DESC:SYSTEM TO WAKE UP AT LEAST ONE BATTERY PACK OF AN UNINTERRUPTED POWER SUPPLY
CROSS REFERENCE TO RELATED APPLICTIONS
The present application claims priority from Indian Provisional Patent Application No. 202421002170 filed on 11-01-2024, the entirety of which is incorporated herein by a reference.
TECHNICAL FIELD
The present disclosure generally relates to uninterrupted power supply systems. Further, the present disclosure particularly relates to a system to wake up at least one battery pack from a deep discharge state.
BACKGROUND
Uninterrupted power supply plays a significant role in making sure the continuous operation of critical devices during power outages. The systems often comprise a power source, one or more battery packs, and a management arrangement. Battery packs within such systems serve as a primary energy reserve, providing backup power when external supply sources fail. However, prolonged inactivity or insufficient management can cause battery packs to enter a deep discharge state, adversely affecting their readiness for use.
Deep discharge occurs when the voltage level of a battery pack drops below a critical threshold due to extended periods without recharging or monitoring. Such states compromise the capacity of the battery pack and pose challenges in reactivating the battery pack for subsequent operations. Conventional systems address said issue by employing standard charging mechanisms or manual interventions to restore the voltage levels. However, such methods often fail to respond effectively to deeply discharged states, leading to permanent damage or reduced lifespan of the battery packs.
Monitoring arrangements are frequently implemented in uninterrupted power supply systems to detect battery discharge levels. Such arrangements typically involve continuous voltage assessments using sensors or circuits integrated within the system. While monitoring helps identify the occurrence of deep discharge, the energy consumption of continuous monitoring circuits often leads to further depletion of the battery pack, exacerbating the discharge problem. Additionally, inaccuracies in voltage measurement caused by environmental fluctuations, such as temperature variations, reduce the reliability of conventional monitoring approaches.
Another technique involves wakeup mechanisms that depend on external power sources to initiate the reactivation process for battery packs. Such mechanisms are activated only when the external power supply is restored, leaving the system ineffective during extended power outages. Furthermore, existing systems lack the capability to efficiently handle multiple battery packs, which is important for uninterrupted power supply systems designed for high-demand applications.
Conventional wakeup arrangements also face challenges in achieving prompt and efficient reactivation of battery packs from a deep discharge state. The reliance on general charging systems, manual interventions, or periodic monitoring creates inefficiencies, especially in scenarios where the uninterrupted power supply system must be immediately operational. Moreover, such arrangements do not incorporate provisions for optimising the power source or assuring effective management of multiple battery packs in a coordinated manner.
Thus, there is a need for an arrangement within uninterrupted power supply systems that effectively addresses the limitations of conventional approaches. The arrangement should provide a mechanism capable of waking up at least one battery pack from a deep discharge state without dependency on external power restoration or continuous monitoring. The proposed solution should also cater to scenarios involving multiple battery packs, enabling their readiness for operation in an efficient and coordinated manner.
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SUMMARY
The aim of the present disclosure is to provide a system to wake up at least one battery pack of an uninterrupted power supply, making sure readiness for operation in an efficient and coordinated manner.
The present disclosure relates to a system to wake up at least one battery pack of an uninterrupted power supply. The system comprises a power source, at least one battery pack, and a wakeup unit. The wakeup unit is structured to wake up at least one battery pack from a deep discharge state, enabling restoration of normal operation. The power source delivers energy to initiate the recovery process for the at least one battery pack, while the wakeup unit manages the necessary conditions to bring the battery pack out of the deep discharge state.
In another aspect, the system comprising a wakeup unit with a voltage sensing unit. The voltage sensing unit monitors the voltage level of at least one battery pack during the wake-up process. The voltage sensing unit identifies when the voltage level of the battery pack exceeds a predefined threshold and ceases the wake-up process to prevent overcharging or damage to the battery pack. The voltage sensing unit is integrated to assure that the wake-up process is conducted within safe operational limits by actively monitoring voltage levels and acting promptly upon detection of threshold values.
In another aspect, the system comprising a wakeup unit that comprises a power conversion unit and a switch. The power conversion unit connects the power source to at least one battery pack and converts the input power to a form suitable for charging the battery pack. The power conversion unit delivers energy to charge the battery pack up to a pre-set level determined based on operational requirements. A switch within the wakeup unit disconnects the power source from the battery pack when a voltage level greater than a predefined threshold is detected.
In another aspect, the system comprising a wakeup unit capable of reconnecting the power source to at least one battery pack. The wakeup unit performs reconnection when the battery pack is charged up to a pre-set level, ensuring the readiness of the battery pack for subsequent operations. The reconnection process is managed by the wakeup unit in a manner that coordinates with other system components.
In another aspect, the system comprising a wakeup unit capable of identifying at least one faulty battery pack. The wakeup unit isolates the faulty battery pack from the wake-up process to prevent unnecessary energy consumption and enable efficient operation. The wakeup unit employs diagnostic features to detect and exclude faulty battery packs, enabling the system to focus recovery efforts on operational battery packs while maintaining overall safety and reliability of the system.
BRIEF DESCRIPTION OF DRAWINGS
The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific methods and instrumentalities disclosed herein. Moreover, those in the art will understand that the drawings are not to scale. Wherever possible, like elements have been indicated by identical numbers.
Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:
FIG. 1 illustrates a system 100 to wake up at least one battery pack of an uninterrupted power supply, in accordance with the embodiments of the present disclosure.
FIG. 2 illustrates the wakeup unit 106, in accordance with the embodiments of the present disclosure.
FIG. 3 illustrates a method 300 for waking up at least one battery pack of an uninterrupted power supply system, in accordance with the embodiments of the present disclosure.
FIG. 4 illustrates a method 400 for disconnecting and reconnecting a power source 102 to at least one battery pack 104 during a wake-up process, in accordance with the embodiments of the present disclosure.
FIG. 5 illustrates a method 500 for identifying and isolating a faulty battery pack 104 within at least one battery pack 104 during a wake-up process, in accordance with the embodiments of the present disclosure.
In the accompanying drawings, an underlined number is employed to represent an item over which the underlined number is positioned or an item to which the underlined number is adjacent. A non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
DETAILED DESCRIPTION
The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognise that other embodiments for carrying out or practising the present disclosure are also possible.
The description set forth below in connection with the appended drawings is intended as a description of certain embodiments of a motor of an electric vehicle and is not intended to represent the only forms that may be developed or utilised. The description sets forth the various structures and/or functions in connection with the illustrated embodiments; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimised to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
The terms “comprise”, “comprises”, “comprising”, “include(s)”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, system that includes a list of components or steps does not comprise only those components or steps but may include other components or steps not expressly listed or inherent to such setup or system. In other words, one or more elements in a system or apparatus preceded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings, and which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
The present disclosure will be described herein below with reference to the accompanying drawings. In the following description, well known functions or constructions are not described in detail since they would obscure the description with unnecessary detail.
As used herein, the term "deep discharge" refers to the condition where a rechargeable battery or battery pack is discharged to a low state of charge, typically below a specified threshold, which can cause potential damage to the battery's long-term performance and functionality. Deep discharge occurs when the battery's voltage drops to a critically low level, often below 20% of its nominal voltage, due to prolonged use or failure to recharge in a timely manner. This condition can lead to irreversible capacity loss, decreased efficiency, and reduced cycle life of battery cells. Recharging a deeply discharged battery presents particular challenges, as the electronics of the charging unit rely on the use of charging current to activate the charging process. In cases of deep discharge, the battery voltage may be so low that the charging unit’s circuitry cannot detect it or trigger the charging process, preventing the battery from accepting charge. Additionally, deep discharge can impair the battery's ability to accept current, leading to slower recharging or, in some cases, failure to initiate charging altogether. Furthermore, when recharging such a battery, there is an increased risk of overheating, internal short-circuiting, or thermal runaway if the battery’s protection mechanisms are compromised.
As used herein, the term "power source" refers to a component or device that provides electrical energy required to charge a battery pack or operate a system. A power source converts one form of energy, such as chemical, mechanical, or solar, into electrical energy that can be used for charging or powering energy storage units. Examples of power sources include grid power, solar power, or another battery with a higher capacity. A power source may deliver direct current (DC) or alternating current (AC), depending on architecture. For instance, grid power may be used to charge a battery pack in a stationary application, while a solar panel generates electricity using solar radiation to charge a battery pack in off-grid systems. Similarly, a higher-capacity battery can serve as a power source to recharge a smaller battery pack in portable or mobile applications.
As used herein, the term "battery pack" refers to an energy storage device comprising one or more interconnected rechargeable cells. A battery pack stores electrical energy in chemical form and releases the stored energy as electrical energy when required by the system. Battery packs may incorporate a variety of different cell chemistries, including lithium-ion (Li-ion), lithium iron phosphate (LiFePO4), nickel-metal hydride (NiMH), lead-acid, and solid-state batteries, among others, depending on the specific application and performance requirements. Examples of battery packs include lithium-ion battery packs used in electric vehicles, lead-acid battery packs for uninterrupted power supplies, and nickel-metal hydride battery packs in hybrid electric vehicles. A battery pack typically comprises individual cells arranged in series or parallel configurations to achieve the desired voltage and capacity. Additionally, a battery pack may incorporate various safety features such as thermal protection, short-circuit prevention mechanisms, and a battery management system to monitor voltage, current, and temperature, ensuring the safe and efficient operation of the energy storage device.
As used herein, the term "wakeup unit" refers to a component responsible for activating or restoring the operation of an energy storage device, such as a battery pack, from a non-functional or low-energy state. The wakeup unit performs necessary operations, including monitoring the state of the battery pack, initiating energy transfer processes, and controlling the reactivation sequence. For example, a wakeup unit in an uninterrupted power supply system may detect the voltage level of a battery pack, supply controlled electrical pulses, and gradually charge the battery pack to recover from a deep discharge state.
As used herein, the term "voltage sensing unit" refers to a device or circuit measures and monitor the voltage levels of an electrical component or system. The voltage sensing unit detects changes in voltage and provides data to enable further actions or adjustments. Examples of voltage sensing units comprise voltage dividers, operational amplifiers, or microcontroller-based sensing circuits. For instance, a voltage sensing unit in a power management system may continuously measure the voltage of a battery pack to determine the state of charge. Various devices and circuits can be used to determine voltage or other battery parameters, depending on the specific application and requirements. These devices include, but are not limited to, voltage dividers, operational amplifiers, analog-to-digital converters (ADC), and microcontroller-based sensing circuits. Additionally, voltage sensing units may be integrated with other sensors to measure a variety of battery parameters, such as temperature, current, and state of charge (SOC). These parameters provide a view of the battery’s performance and health. For instance, a voltage sensing unit in a power management system may continuously measure the voltage of a battery pack to determine its state of charge and ensure that it operates within safe voltage limits. Other systems may also monitor the rate of voltage change to detect potential issues such as rapid discharge or abnormal fluctuations, providing early warnings for battery management and protection.
As used herein, the term "switch" refers to an electrical or electronic device that controls the connection or disconnection of electrical circuits. The switch can be operated manually or automatically, depending on the application. Examples of switches comprise mechanical switches, relays, transistors, or solid-state switches.
As used herein, the term "power conversion unit" refers to a device or system that modifies electrical power from one form to another to suit the requirements of the connected load or system. Power conversion comprises operations such as voltage regulation, current control, or frequency adjustment. Examples of power conversion units comprise DC-DC converters, inverters, rectifiers, or AC-DC power supplies.
FIG. 1 illustrates a system 100 to wake up at least one battery pack of an uninterrupted power supply, in accordance with the embodiments of the present disclosure. The system 100 comprises a power source 102. The power source 102 provides electrical energy required for operating various components of the system 100 and for charging the at least one battery pack 104. The power source 102 may comprise any device or arrangement capable of converting energy into an electrical form. For instance, the power source 102 may comprise an alternating current (AC) power supply, a direct current (DC) power supply, or renewable energy sources such as solar panels or wind turbines. The power source 102 may also comprise devices such as transformers, converters, or inverters that modify the input energy to a suitable output format for use within the system 100. The power source 102 may further comprise mechanisms to regulate voltage, current, or frequency to assure consistent power delivery. In an example, the power source 102 may incorporate a power management unit for monitoring and controlling the energy supplied to the components of the system 100. The power source 102 may operate in conjunction with energy storage devices to provide backup energy during interruptions in the primary power supply. The power source 102 may interface with the wakeup unit 106 to supply energy required for waking up the at least one battery pack 104 from a deep discharge state. Such an arrangement affirms the availability of a reliable source of energy to perform necessary operations within the system 100. The power source 102 may additionally comprise safety features, such as overload protection or short-circuit prevention, to protect connected components. The power sources can be selected from lithium-ion batteries, fuel cells, generators, or grid-connected power supplies.
In an embodiment, the system 100 comprises at least one battery pack 104. The at least one battery pack 104 serves as an energy storage unit that provides backup power when the power source 102 is unavailable or insufficient. The at least one battery pack 104 may comprise one or more interconnected rechargeable battery cells arranged in series, parallel, or a combination of both configurations to achieve desired voltage and capacity levels. The at least one battery pack 104 may be selected from lithium-ion cells, nickel-metal hydride cells, or lead-acid cells. The at least one battery pack 104 may comprise protective features, such as thermal management systems, short-circuit protection mechanisms, and cell balancing circuits, to enhance reliability and lifespan. The at least one battery pack 104 may comprise a battery management system to monitor and control parameters such as voltage, current, temperature, and state of charge. Such monitoring enables the at least one battery pack 104 to deliver energy consistently and safely during operation. The at least one battery pack 104 may interact with the wakeup unit 106, which detects and manages the deep discharge state of the battery pack 104. A deep discharge state refers to a condition where the voltage level of the at least one battery pack 104 drops below a threshold, compromising the performance or usability. The at least one battery pack 104 may comprise connectors or terminals that facilitate energy transfer and communication with other components of the system 100. Examples of applications for the at least one battery pack 104 comprise uninterrupted power supply systems, electric vehicles, and renewable energy storage systems. The at least one battery pack 104 may be designed for repeated charging and discharging cycles, making suitable for long-term energy storage and reliable backup power supply.
In an embodiment, the system 100 comprises a wakeup unit 106. The wakeup unit 106 is responsible for reactivating the at least one battery pack 104 from a deep discharge state. The wakeup unit 106 performs operations such as monitoring the voltage level of the at least one battery pack 104, initiating recovery processes, and managing energy transfer to restore the operational state of the battery pack 104. The wakeup unit 106 may comprise components such as a voltage sensing unit, a pulse generator, a power conversion circuit, and control logic to execute the wake-up process. The wakeup unit 106 may monitor the voltage level of the at least one battery pack 104 to determine whether the voltage level has reached a predefined threshold requiring recovery. Upon detection of a deep discharge state, the wakeup unit 106 may initiate a controlled recovery process. For instance, the wakeup unit 106 may generate a series of electrical pulses using the pulse generator to stimulate the battery pack 104 and restore the functionality. The wakeup unit 106 may also incorporate a power conversion circuit to regulate the voltage or current supplied to the battery pack 104 during the recovery process. Such regulation prevents overcharging or damage to the battery pack 104. The wakeup unit 106 may comprise a timer circuit to introduce a delay in the recovery process, allowing the power source 102 to stabilize before initiating energy transfer. Additionally, the wakeup unit 106 may comprise communication interfaces to enable remote monitoring or control of the wake-up process. The wakeup units may be utilized in systems used in uninterrupted power supplies, automotive battery recovery systems, and renewable energy storage systems. The wakeup unit 106 may operate in coordination with the power source 102 and the at least one battery pack 104 to achieve efficient and reliable restoration of the battery pack 104 from a deep discharge state. In one embodiment, the predefined threshold can be selected from 2.5V, 2.4V, 2.3V, 2.2V, 2.0V per cell. Alternatively, the predefined threshold can be 10%, 15%, 20%, or 25% of the original capacity of the cell.
In an exemplary scenario where Mr. John is using a battery pack 104 as part of a home Uninterrupted Power Supply (UPS) unit, and battery pack 104 is not recharged for two, the battery enters a state of deep discharge. In a deep discharge state, the voltage level of the battery pack 104 falls so low that the on-board charging infrastructure of the UPS, which relies on electrical energy from the battery pack to initiate the charging process, is unable to function. This situation is problematic because the onboard charging infrastructure of the UPS requires a minimal electrical energy level from the battery pack 104 to initiate the charging process. In deeply discharged state, the battery pack 104 is incapable of providing the necessary energy to start charging, rendering conventional systems ineffective. The inclusion of wakeup unit 106 in the charging system 100 of UPS overcomes limitations of existing charging infrastructure. The wakeup unit 106, when integrated into the UPS, comprises a voltage sensing unit and a power conversion unit 204 that operates in conjunction with a power source 102. Upon detecting a deeply discharged state, the wakeup unit 106 activates to deliver energy from the power source 102 to the battery pack 104, gradually increasing its voltage to a pre-set level, such as 2.5 volts per cell for a lithium-ion battery pack. Once the voltage sensing unit detects that the voltage of the battery pack 104 has exceeded the predefined threshold, such as 3.0 volts per cell, the switch 202 disconnects the power source 102 from the battery pack 104 and the wakeup unit 106 ceases operation. Subsequently, the onboard charging unit of UPS resumes charging the battery pack 104 to full capacity using its standard charging protocol. Thus, the system 100 enables the recovery of deeply discharged battery packs 104, which would otherwise be non-functional in traditional setups. By bridging the gap between deep discharge and normal charging, wakeup unit 106 enables extended battery life and reduces the need for battery replacement, leading to cost savings for users.
In an embodiment, the wakeup unit 106 may comprise a voltage sensing unit that monitors the voltage level of at least one battery pack 104. The voltage sensing unit operates by continuously or intermittently measuring the electrical potential of the battery pack 104, enabling detection of conditions that warrant termination of the wake-up process. When the voltage level of the battery pack 104 surpasses a predefined threshold, the voltage sensing unit initiates an interruption in the wake-up process to avoid overcharging or further stress on the battery cells. The voltage sensing unit is integrated into the overall wakeup unit 106 structure, establishing a connection to the power source 102 and the battery pack 104 through electrical pathways. The connection facilitates real-time voltage measurement, providing accurate data on the current state of the battery pack 104. The threshold for termination of the wake-up process is pre-set within the voltage sensing unit and is adaptable to meet various operational requirements. The voltage sensing unit employs electronic components to achieve voltage readings and reliable operation under a wide range of environmental conditions.
FIG. 2 illustrates the wakeup unit 106, in accordance with the embodiments of the present disclosure. The wakeup unit 106 may comprise a power conversion unit 204 and a switch 202, each of which plays a distinct role in the operation of the system 100. The power conversion unit 204 manage connection or disconnection of power source 102 to at least one battery pack 104 and for converting input AC power to DC power. The power conversion unit 204 delivers a controlled charging current to the battery pack 104 until the battery reaches a pre-set voltage level. The power conversion unit 204 operates using a set of rectifiers and electronic components to efficiently transform the AC power supplied by the power source 102 into DC power suitable for charging the battery pack 104. The transformation process involves filtering mechanisms to stabilize the output and eliminate fluctuations in the supplied current, enabling safe and stable charging conditions for the battery pack 104. The power conversion unit 204 is further integrated with sensors that monitor the charging process, including the real-time voltage and current levels, to prevent overcharging and potential damage to the battery packs 104.
In an embodiment, the switch 202 within the wakeup unit 106 disconnects the power source 102 from the battery pack 104 upon detecting that the voltage level of the battery pack 104 exceeds a predefined threshold. The switch 202 operates in coordination with the voltage sensing unit to provide signal for timely disconnection, thus safeguarding the battery pack 104 from excessive charging. The switch 202 may employ solid-state components, such as transistors or relays, to enable fast and reliable disconnection with minimal energy loss. The integration of the switch 202 into the wakeup unit 106 enables establishments of electrical connections that allow seamless operation alongside the power conversion unit. The switch 202 remains in a closed state during the charging process, allowing the power source 102 to deliver energy to the battery pack 104. Once the voltage sensing unit detects a voltage level beyond the predefined threshold, the switch 202 transitions to an open state, effectively halting the flow of current to the battery pack 104. In an embodiment, once the battery pack 104 or a cell thereof reaches the predefined charging level, the switch 202 disables the power supply from the power source 102 to the battery pack 104. This disconnection occurs to prevent overcharging and ensure the safety of the battery pack 104. When the cell or battery pack 104 reaches the predefined charging level, the regular charging unit can be activated to enable charging at a higher current or in turbo charging mode. Unless the wakeup unit 106 charges the battery pack 102 at pre-set level from deep discharged state, the regular charging unit cannot be activated to charge battery pack 102. The switch 202 operates in coordination with the voltage sensing unit to provide the signal for timely disconnection, thus enable activation of the battery pack 104 from deep discharge. The switch 202 may employ solid-state components, such as transistors or relays, to enable fast and reliable disconnection with minimal energy loss. The integration of the switch 202 into the wakeup unit 106 enables the establishment of electrical connections that allow seamless operation alongside the power conversion unit. The switch 202 remains in a closed state during the charging process, allowing the power source 102 to deliver energy to the battery pack 104. Once the voltage sensing unit detects a voltage level beyond the predefined threshold, the switch 202 transitions to an open state, effectively halting the flow of current to the battery pack 104.
In an embodiment, the wakeup unit 106 may reconnect the power source 102 to each battery pack 104 once the at least one battery pack 104 is charged up to the pre-set level. The pre-set level represents a specific voltage or state of charge at which the battery pack 104 is considered ready for operation. The reconnection process restores the electrical connection between the power source 102 and the battery pack 104, enabling the battery pack 104 to resume the role within the system 100. The reconnection may be achieved through a switch or relay controlled by the wakeup unit 106. The wakeup unit 106 monitors the charging status of the battery pack 104 and activates the reconnection mechanism when the pre-set level is reached. The reconnection process may comprise safety checks, such as verifying the stability of the power source 102 or making sure that the battery pack 104 does not exhibit any fault conditions. The reconnection mechanism may comprise features such as current-limiting circuits to prevent sudden inrush currents during the transition. For example, a solid-state relay may gradually ramp up the connection to avoid abrupt changes in current flow.
In an embodiment, the wakeup unit 106 may be is configured to identify at least one faulty battery pack 104 and isolates the identified faulty battery pack 104 from the wake-up process. Fault identification involves monitoring parameters such as voltage, current, or temperature to detect deviations from normal operating conditions. The wakeup unit 106 may comprise sensors or diagnostic circuits to measure said parameters and compare them with predefined thresholds. For example, a battery pack 104 exhibiting a voltage below a critical limit or overheating during the charging process may be classified as faulty. Once a fault is detected, the wakeup unit 106 activates isolation mechanisms, such as relays or switches, to disconnect the faulty battery pack 104 from the wake-up process. Isolation prevents further damage to the faulty battery pack 104 and affirm that the available energy is focused on restoring functional battery packs 104. The wakeup unit 106 may also generate alerts or status reports indicating the presence of a fault for maintenance purposes.
In an embodiment, the wakeup unit 106 may determine an optimal current to be supplied to the at least one battery pack 104 for waking up the at least one battery pack 104. The determination of the optimal current involves analyzing parameters such as the state of charge, internal resistance, and temperature of the battery pack 104. The wakeup unit 106 may comprise control circuitry to calculate the appropriate current level based on said parameters. For example, a microcontroller may process input data from sensors to dynamically adjust the current output of the power conversion unit. Supplying an optimal current minimizes the risk of overcharging or overheating while accelerating the recovery of the battery pack 104. The wakeup unit 106 may store predefined current profiles for different types of battery packs 104 and select the appropriate profile during the wake-up process.
In an embodiment, the wakeup unit 106 may comprise a dynamic impedance matching unit configured to adjust the impedance between the power source 102 and the at least one battery pack 104 based on real-time voltage and current measurements. The dynamic impedance matching unit optimizes energy transfer by assuring that the impedance of the power source 102 and the battery pack 104 are compatible. The dynamic impedance matching unit may comprise components such as variable resistors, capacitors, or active electronic elements that modify impedance in response to control signals. Sensors within the wakeup unit 106 measure voltage and current at various points in the circuit, providing data for real-time adjustments. For example, if the internal resistance of the battery pack 104 increases during the wake-up process, the dynamic impedance matching unit compensates by modifying the output characteristics of the power source 102.
In an embodiment, the dynamic impedance matching unit may optimize energy transfer efficiency by adapting power transfer parameters in response to the internal resistance of the at least one battery pack 104. Internal resistance affects the energy transfer process by causing power loss and limiting the charging rate. The dynamic impedance matching unit continuously monitors the internal resistance of the battery pack 104 and adjusts parameters such as voltage, current, or frequency to reduce losses. For example, the circuit may increase the voltage to overcome higher resistance while maintaining a constant current. The circuit may comprise feedback loops to monitor the effects of adjustments and refine the settings for improved performance.
In an embodiment, the dynamic impedance matching unit may incorporate an adaptive feedback loop to continuously monitor and modify the impedance values during the wake-up process. The adaptive feedback loop comprises sensors, controllers, and actuators that work together to maintain optimal impedance matching. Sensors measure parameters such as voltage, current, or temperature and transmit the data to the controller. The controller processes the data and generates control signals to adjust the impedance matching circuit. The adaptive feedback loop enables the wakeup unit 106 to respond to dynamic changes in the battery pack 104 or the power source 102.
FIG. 3 illustrates a method 300 for waking up at least one battery pack of an uninterrupted power supply system, in accordance with the embodiments of the present disclosure. At step 302, the voltage sensing unit detects a voltage level of the at least one battery pack 104. The voltage sensing unit monitors the electrical potential across the terminals of the at least one battery pack 104 and generates an output indicative of the measured voltage. Said output is used to determine the current state of the battery pack 104, particularly in identifying whether the battery pack 104 is in a deep discharge state. The voltage sensing unit may comprise components such as resistive voltage dividers, analog-to-digital converters, and microcontroller-based circuits. For example, a resistive divider reduces the voltage to a measurable range, while an analog-to-digital converter translates the voltage into a digital signal for processing. The voltage sensing unit may operate continuously or periodically, depending on the requirements of the system 100, to provide real-time updates on the condition of the battery pack 104.
At step 304, the wakeup unit 106 initiates the wake-up process when the detected voltage level of the at least one battery pack 104 falls below a predefined threshold. The predefined threshold represents the minimum allowable voltage required to maintain the operational readiness of the battery pack 104. Upon identifying that the voltage has dropped below the threshold, the wakeup unit 106 activates the recovery process by enabling other components within the system 100. The recovery process may comprise signalling the pulse generator to prepare for energy delivery. The initiation of the wake-up process makes sure that the deeply discharged battery pack 104 is restored to a functional state before being reintegrated into the system 100.
At step 306, the pulse generator supplies controlled electrical pulses to the at least one battery pack 104 to initiate recovery from deep discharge. The pulses are delivered with specific characteristics, including amplitude, frequency, and duration, tailored to the requirements of the battery pack 104. The pulse generator may comprise components such as oscillators, timing circuits, and switching elements to regulate the generation and delivery of the pulses. For instance, an oscillator generates a periodic signal, which is shaped and amplified by switching devices to produce pulses suitable for reactivating the battery pack 104. The controlled pulses gradually restore the charge within the battery pack 104, stimulating the electrochemical processes and increasing the voltage level to recover from the deep discharge state. Sensors may monitor the response of the battery pack 104 during said process, providing feedback to dynamically adjust the pulse parameters.
FIG. 4 illustrates a method 400 for disconnecting and reconnecting a power source 102 to at least one battery pack 104 during a wake-up process, in accordance with the embodiments of the present disclosure. At step 402, the method 400 involves connecting the power source 102 to at least one battery pack 104 through the power conversion unit 204 that operates to charge the battery pack 104 up to a pre-set voltage level. The power conversion unit 204 serves the purpose of transforming the input power from the power source 102 into a form suitable for charging the battery pack 104, specifically converting AC power into DC power. The power conversion unit 204 incorporates rectifiers and filters that eliminate voltage fluctuations and ensure stable delivery of electrical energy. The power conversion unit 204 is connected to the power source 102 via electrical pathways, allowing for continuous energy flow during the charging process. The pre-set voltage level is determined based on the optimal charging specifications for the battery pack 104, making sure that the cells within the battery pack 104 receive the appropriate voltage to recover from a deep discharge state. During the charging process, sensors integrated within the power conversion unit 204 monitor the real-time voltage and current levels to enable consistent energy delivery.
At step 404, the method 400 further involves disconnecting the power source 102 from the battery pack 104 via the switch 202 when the detected voltage level of the battery pack 104 exceeds a predefined threshold. The switch 202 is electrically linked to the power source 102 and the battery pack 104. The voltage level is continuously monitored by a voltage sensing unit that operates in conjunction with the switch 202. Upon detecting a voltage level above the predefined threshold, the sensing unit sends a signal to the switch 202, causing it to transition to an open state. The disconnection halts the flow of current from the power source 102 to the battery pack 104, preventing overcharging and potential damage to the battery cells. The switch 202 employs solid-state components, such as MOSFETs or relays, that enable rapid and reliable operation under varying electrical conditions.
In an embodiment, the method may comprise reconnecting the power source 102 to the at least one battery pack 104 once the at least one battery pack 104 is charged to the pre-set level. The pre-set level represents the desired state of charge or voltage required for the battery pack 104 to resume the normal operation within the system 100. The reconnection is achieved through a controlled process that re-establishes the electrical connection between the power source 102 and the battery pack 104. A switch, such as a mechanical switch, relay, or solid-state device, may facilitate the reconnection. The wakeup unit 106 monitors the charging process and determines when the pre-set level is reached by analyzing parameters such as voltage or state of charge of the battery pack 104. Once the wakeup unit 106 confirms that the pre-set level is reached, said wakeup unit 106 sends a signal to the switch to close the circuit and reconnect the power source 102 to the battery pack 104. The reconnection process may comprise safety measures, such as gradual ramp-up circuits or current-limiting mechanisms, to prevent sudden inrush currents that could damage the battery pack 104 or other components in the system 100. For example, a solid-state switch may employ pulse-width modulation to gradually increase the energy transfer rate, enabling a smooth transition. The reconnection may also involve a verification step to make sure the power source 102 is stable and the battery pack 104 is free from fault conditions before resuming normal operation. Additionally, the wakeup unit 106 may coordinate with other components of the system 100, such as load controllers or power distribution units, to synchronize the reconnection process with the overall functionality of the system 100. The coordinated process allows the battery pack 104 to reintegrate seamlessly into the system and contribute to the energy storage and supply functions.
FIG. 5 illustrates a method 500 for identifying and isolating a faulty battery pack 104 within at least one battery pack 104 during a wake-up process, in accordance with the embodiments of the present disclosure. At step 502, the method involves identifying a faulty battery pack 104 within the at least one battery pack 104. The identification process begins by monitoring key parameters of each battery pack 104, such as voltage, current, and temperature, to detect deviations from predefined normal operating ranges. Sensors within the wakeup unit 106 collect real-time data for the parameters, which is then analyzed by control circuitry or a microcontroller. A battery pack 104 may be deemed faulty if the voltage falls below a critical threshold, exhibits excessive current leakage, or shows abnormal temperature behavior indicative of internal damage. For example, a lithium-ion battery pack 104 experiencing rapid self-discharge or overheating during operation may be classified as faulty. The wakeup unit 106 may compare the measured parameters with predefined fault thresholds stored in memory to identify irregularities. Additional diagnostic checks, such as internal resistance measurements, may also be performed to verify the health of the battery pack 104. Once a battery pack 104 is identified as faulty, the wakeup unit 106 flags said battery pack 104 for isolation from the wake-up process.
At step 504, the method comprises isolating the identified faulty battery pack 104 from the wake-up process. Isolation involves disconnecting the faulty battery pack 104 from the power source 102 and the remaining battery packs 104 within the system 100 to prevent further energy transfer. The Isolation is achieved using switches or relays controlled by the wakeup unit 106. Upon identifying a fault, the wakeup unit 106 signals the respective switch associated with the faulty battery pack 104 to open. The isolation step protects the remaining battery packs 104 and the overall system 100 from damage caused by the faulty battery pack 104. The wakeup unit 106 may also deactivate any recovery processes, such as pulse generation, that were initiated for the faulty battery pack 104. Additionally, the wakeup unit 106 may generate an alert or log diagnostic data indicating the fault, which can be used for maintenance or replacement of the battery pack 104. The isolation process assures that energy is directed exclusively to functional battery packs 104 during the wake-up process, maximizing the reliability and efficiency of the system 100.
In an industrial setting, a system 100 is implemented as part of an uninterrupted power supply for a data center. The system 100 comprises a power source 102 that supplies 48 volts of direct current, derived from a grid-connected AC power supply and converted using an inverter. The power source 102 is connected to at least one battery pack 104 that is configured to store for energy storage to supply energy to various components such as server, lighting arrangement etc. The battery pack 104 consists of lithium-ion cells configured to provide 48 volts at a capacity of 100 ampere-hours. Generally, battery pack 102 get charged from power grid. In event of poor maintenance (e.g., non-charging for prolong time such as 2-4 weeks or 1-4 months etc.) leads to deep discharge the battery pack 104. The wakeup unit 106 is integrated into the system 100 to manage recovery processes when the battery pack 104 enters a deep discharge state due to prolonged inactivity or excessive energy draw during an outage.
During a power outage, the battery pack 104 experiences significant depletion, with the voltage dropping to 40 volts, below the predefined threshold of 44 volts. The wakeup unit 106 detects said condition using a voltage sensing unit that continuously monitors the voltage level of the battery pack 104. Upon identifying the low voltage condition, the wakeup unit 106 activates a pulse generator to supply controlled electrical pulses to the battery pack 104. The pulses are configured with an amplitude of 5 volts and a frequency of 1 Hz to gradually restore the electrochemical activity of battery pack 104. Over a recovery period of 30 minutes, the voltage level of the battery pack 104 rises to 44 volts, reaching the pre-set threshold for normal operation. Once the battery pack 104 reaches the pre-set threshold, the wakeup unit 106 reconnects the power source 102 to the battery pack 104.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the terms “disposed,” “mounted,” and “connected” are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected, either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Modifications to embodiments and combination of different embodiments of the present disclosure described in the foregoing are possible without departing from the scope of the present disclosure as defined by the accompanying claims. Expressions such as “comprising”, “comprising”, “incorporating”, “have”, “is” used to describe and claim the present disclosure are intended to be construed in a non- exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural where appropriate.
Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the present disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
,CLAIMS:WE CLAIM:
1. A system 100 to wake up at least one battery pack 104 of an uninterrupted power supply, the system comprises:
? a power source 102;
? at least one battery pack 104; and
? a wakeup unit 106, wherein the wakeup unit 106 is configured to wake up the least one battery pack 104 from deep discharge.
2. The system 100 as claimed in claim 1, wherein the wakeup unit 106 comprising a voltage sensing unit that detects a voltage level of the at least one battery pack 104 and ceases a wake-up process when the detected voltage level falls above a predefined threshold.
3. The system 100 as claimed in claim 1, wherein the wakeup unit 106 comprises:
a power conversion unit 204 that connects the power source 102 to at least one battery pack 104, wherein the power conversion unit 204 charges the at least one battery pack 104 up to a pre-set level; and
a switch 202 that disconnects the power source 102 to each battery pack 104, upon detection of detected voltage level greater than the predefined threshold;
4. The system 100 as claimed in claim 4, wherein the wakeup unit 106 reconnects the power source 102 to each battery pack 104 once the at least one battery pack 104 is charged up to the pre-set level.
5. The system 100 as claimed in claim 1, wherein the wakeup unit 106 is configured to identify at least one faulty battery pack 104 and isolates the identified faulty battery pack 104 from the wake-up process.
6. The system 100 as claimed in claim 1, wherein the wakeup unit 106 determines an optimal current to be supplied to the at least one battery pack 104 for waking up the at least one battery pack 104.
7. The system 100 as claimed in claim 1, wherein the wakeup unit 106 comprises a dynamic impedance matching unit configured to adjust the impedance between the power source 102 and the at least one battery pack 104 based on real-time voltage and current measurements.
8. The system 100 as claimed in claim 7, wherein the dynamic impedance matching unit optimizes energy transfer efficiency by adapting power transfer parameters in response to the internal resistance of the at least one battery pack 104.
9. The system 100 as claimed in claim 7, wherein the dynamic impedance matching unit incorporates an adaptive feedback loop to continuously monitor and modify the impedance values during the wake-up process.
10. A method for waking up at least one battery pack 104 of an uninterrupted power supply system 100, the method comprising:
detecting, via a voltage sensing unit, a voltage level of the at least one battery pack 104;
initiating a wake-up process when the detected voltage level falls below a predefined threshold; and
supplying controlled electrical pulses to the at least one battery pack 104 using a pulse generator to initiate recovery from deep discharge.
11. The method as claimed in claim 10, further comprising:
connecting the power source 102 to the at least one battery pack 104 through the power conversion unit 204 configured to charge the at least one battery pack 104 up to a pre-set level; and
disconnecting the power source 102 from the at least one battery pack 104 via a switch 202, upon detection of detected voltage level greater than the predefined threshold.
12. The method as claimed in claim 11, further comprising reconnecting the power source 102 to the at least one battery pack 104 once the at least one battery pack 104 is charged to the pre-set level.
13. The method as claimed in claim 10, further comprising:
identifying a faulty battery pack 104 within the at least one battery pack 104; and
isolating the identified faulty battery pack 104 from the wake-up process.