The present disclosure relates to the field of battery operated system and in particular, relates to sensor less control of charging/discharging of internal or external battery/battery bank in a system through a renewable energy source such as MPPT based solar products or PWM based solar products or Solar charge controllers or solar retrofit solution with solar chargers hereafter referred to as Converter A and other bidirectional power conversion AC-DC or DC-AC or DC-DC hereafter referred as Converter B using a communication interface such as RS232 or RS485 or CAN or such communication interfaces.
BACKGROUND
[0002] Offline Solar Power Conditioning Unit (PCU) utilizes solar power to charge battery and power loads. The battery used in typical systems varies from 50Ah to 250AH in most common applications. Therefore, total battery current charging the battery should be limited according to AH of the battery using various methods. One of the methods is to incorporate a costly Hall Effect sensor in the path of the battery and limit this current through A. Generally, renewable sources are connected to Converter A - Battery and Converter B. An external current sensor is used to estimate and control max current in the battery. Typically, max current may or may not be set from GUI (Graphical User Interface) provided as part of system. The max permissible charging current from A and B is limited to the current value set by a user. However, the external current sensor is costly and requires more space. Additionally,

assembly or installation of the external current sensor is a complex process.
OBJECT OF THE DISCLOSURE
[0003] A primary object of the present disclosure is to provide a method to perform battery charging in solar power conditioning unit with converter A and converter B without need of an additional sensor.
[0004] Another object of the present disclosure is to limit charging load current during backup by converter A using communication interface.
[0005] Yet another object of the present disclosure is to estimate battery current using microcontroller firmware of converter A.
[0006] Yet another object of the present disclosure is to limit maximum battery current without use of the additional sensor.
SUMMARY
[0007] In an aspect, the present disclosure provides a solar power conditioning unit for estimating battery current. The solar power conditioning unit includes a set of hardware elements. In addition, the solar power conditioning unit includes a converter A and converter B. The converter A and converter B perform a smart bi-directional communication between each other for estimating the battery current during backup.
[0008] In an embodiment of the present disclosure, the smart bi-directional communication between the converter B and the converter A facilitates limiting of charging load current during backup.

[0009] In an embodiment of the present disclosure, the smart bi-directional communication between the converter B and the converter A facilitates sharing of charging current for optimum use from the converter B.
[0010] In an embodiment of the present disclosure, the set of hardware elements includes a solar panel for receiving solar energy or other renewable sources. The solar panel is made up of one or more photo-voltaic cells.
[0011] In an embodiment of the present disclosure, the set of hardware elements includes a battery for storing solar energy received by a renewable source.
[0012] In an embodiment of the present disclosure, the set of hardware elements includes the B for converting DC current stored in a battery to AC current. The AC current is utilized by a load connected to converter B.
[0013] In an embodiment of the present disclosure, the solar power conditioning unit includes a GUI installed inside a computing device. The GUI facilitates operating the solar power conditioning unit.
STATEMENT OF THE DISCLOSURE
[0014] The present disclosure provides a solar power conditioning unit for estimating battery current. The solar power conditioning unit includes a set of hardware elements. In addition, the solar power conditioning unit includes a converter A and converter B. The converter A and converter B perform a smart bi-directional communication between each other for estimating the battery current during backup.

BRIEF DESCRIPTION OF FIGURES
[0015] Having thus described the disclosure in general terms, reference will now be made to the accompanying figures, wherein:
[0016] FIG. 1 illustrates a general overview of sensor less control of battery charging in solar power conditioning unit with converter A and converter B using communication interface, in accordance with various embodiments of the present disclosure; and
[0017] FIG. 2 illustrates a block diagram of a computing device, in accordance with various embodiments of the present disclosure.
[0018] It should be noted that the accompanying figures are intended to present illustrations of exemplary embodiments of the present disclosure. These figures are not intended to limit the scope of the present disclosure. It should also be noted that accompanying figures are not necessarily drawn to scale.
DETAILED DESCRIPTION
[0019] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present technology. However, it will be apparent to one skilled in the art that the present technology can be practiced without these specific details. In other instances, structures and devices are shown in block diagram form only in order to avoid obscuring the present technology.
[0020] Reference in this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present technology. The appearance of the phrase "in

one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Moreover, various features are described which may be exhibited by some embodiments and not by others. Similarly, various requirements are described which may be requirements for some embodiments but no other embodiments.
[0021] Moreover, although the following description contains many specifics for the purposes of illustration, anyone skilled in the art will appreciate that many variations and/or alterations to said details are within the scope of the present technology. Similarly, although many of the features of the present technology are described in terms of each other, or in conjunction with each other, one skilled in the art will appreciate that many of these features can be provided independently of other features. Accordingly, this description of the present technology is set forth without any loss of generality to, and without imposing limitations upon, the present technology.
[0022] FIG. 1 illustrates a general overview of sensor less control of battery charging in solar power conditioning unit 100 with converter A 104 and an A and converter B 106 using communication interface, in accordance with various embodiments of the present disclosure. In general, converter is an integrated system that provides facility to charge a battery pack through either a solar panel or grid. The power conditioning unit 100 includes a set of hardware elements 112. The set of hardware elements 112 includes a solar panel 102, the converter A 104, the converter B 106, and a battery 108. The converter B 106 includes a GUI 110. The solar power conditioning unit 100 also includes the mains 114 and a load 116. In an

example of the present disclosure, the converter A 104 can be a MPPT charger and the converter B 106 can be an inverter.
[0023] The set of hardware elements 112 includes the solar panel 102. In general, solar panels are used to convert solar energy into electrical energy. In addition, solar panels perform this conversion using an array of photo-voltaic cells. The photo-voltaic cells receive solar energy and convert it into electrical energy through semiconductor diodes. Further, solar panels require continuous exposure to sunlight to produce energy. Furthermore, solar panels work regularly without breakage.
[0024] The solar panel 102 receives solar energy. The solar panel 102 is made up of one or more photo-voltaic cells installed into a framework. The set of hardware elements 112 includes the converter A 104. The converter A 104 is connected to the solar panel 102. The converter A 104 changes voltage of the solar panel 102 to battery level through an electrical conversion unit.
[0025] The converter A 104 utilizes the solar energy produced as per requirement. In an embodiment of the present disclosure, voltage of the solar panel 102 is independent of voltage level of the battery 108. The load 116 is the external electrical device which is using the energy supplied by the solar power conditioning unit 100.
[0026] The converter A 104 is connected to the battery 108. The battery 108 stores the solar energy for use by the converter B 106. The battery 108 acts as a buffer for storage of charge produced by the solar panel 102. In general, solar energy keeps varying according to cloud formation, shadow, time of day, and the like. In addition, load 116 connected to the converter B 106 has variations in loading pattern. In an embodiment of

the present disclosure, the converter A 104 is responsible to charge the battery 108 using an estimation algorithm.
[0027] The converter A 104 and the estimation algorithm between the converter B 106 and converter A 104 helps reduce the hardware components significantly. In general, the hardware components, such as amp meter, hall effect sensor and the like have their own reliability and longevity issues that reduces the life of the system. These components are also financially exhaustive. The PCU environment 100 collectively with converter A 104 and converter B 106 eliminates the need of the hardware components and performs the same process with an estimation algorithm that predicts the charge required by the battery 108 and reduces total hardware elements, increases the longevity of the system and saves financial resources.
[0028] In an embodiment of the present disclosure, the converter A 104 automatically detects the current required by the battery 108 depending on the specification of the battery 108 as provided by the manufacturer. The estimation is done with the help of a method which may utilize an estimation algorithm embedded in the GUI 110. The method saves the battery 108 from over voltage, over charging and the like. As the battery 108 is an expensive component of the system, the sensor-less converter A 104 thus contributes towards the longevity of the battery 108.
[0029] In an example of the present disclosure, the maximum current supplied by the converter A 104 is 60A, the load current is 20A and the set charging current for the battery is 10A, then the serial communication between the A converter 104, the battery 108 and the converter B 106, with utilization of the estimation algorithm dictates the converter A 104 to only provide 30A as output current out of which only 10A will go into the battery 108, previously, without the algorithm in place the current out

would have been 40A. In another example of the present disclosure, the maximum current supplied by the converter A 104 is 60A, the load current is 30A and the set charging current is 10A, the converter A 104 output current will be 40A out of which only 10A will go to the battery 108 as set and the rest 30A will power the load. In absence of the algorithm, the battery current would have been 30A which is not favorable for longevity of the battery 108 component.
[0030] The converter B 106 connects to the battery 108. In an embodiment of the present disclosure, the converter B 106 is responsible to convert DC (Direct Current) stored in the battery 108 to AC (Alternating Current) used by the load 116. The load 116 connected to the converter B 106 utilizes the AC current.
[0031] In an embodiment of the present disclosure, the battery 108 provides charge to the converter B 106 to be used by load 116. In another embodiment of the present disclosure, the converter B 106 connects to the converter A 104 for internal and continuous control and communication.
[0032] The solar converter B 106 includes the GUI 110. In general, GUI (Graphical User Interface) is a type of user interface through which users interact with electronic devices via visual indicator representations. The GUI 110 facilitates end user to operate the solar power conditioning unit 100
[0033] In an embodiment of the present disclosure, the GUI 110 is used in cohesion with algorithm to eliminate use of an external hall effect sensor. In general, hall effect sensor is a type of sensor that detects presence and magnitude of a magnetic field using hall effect. In addition, hall effect sensors are used to control charging functionality of battery pack.

[0034] The converter B 106 and the converter A 104 perform a smart bi-directional communication between each other to estimate the battery current during backup. In an embodiment of the present disclosure, the smart bi-directional communication between the converter B 106 and the converter A 104 facilitates limiting of charging load current during backup. In an embodiment of the present disclosure, the smart bi-directional communication between the converter B 106 and the converter A 104 facilitates sharing of charging current for optimum use from the converter B 106.
[0035] The GUI 110 is an interactive interface. In an embodiment of the present disclosure, the GUI 110 limits use of maximum current required by the battery 108 depending upon load conditions, the type and specification of the battery 108 and can be set manually by the consumer through the GUI 110 that is installed in the converter B 106. The GUI 110 facilitates to eliminate need of hall effect sensor to limit charging current required by the battery 108. In an embodiment of the present disclosure, the plurality of consumers can set the appropriate required current by the battery 108 depending on ampere hours(Ah) of the battery 108. In general, the ampere hours(Ah) is the battery capacity and decides the backup hours by the battery. In addition, the GUI 110 ensures proper functioning of the battery 108.
[0036] The solar power conditioning unit 100 performs a method, the method includes estimation of battery current. The method includes a first step of charging the battery 108 at the solar power conditioning unit 100 with the converter A 104 that executes the estimation algorithm for the required battery current. The method includes a second step of a smart bi-directional communication performed between the converter A 104 and the converter B 106 for estimation and limiting the charging current required. A communication network performs the smart

bi-directional current. The method includes a third step, allows user to set the charging current required by the battery 108 through the GUI 110. A computing device in the power conditioning unit 100 includes the GUI 110.
[0037] The electrical energy required to charge the battery 108 is generated by the solar panel 102 at the power conditioning unit 100. The battery 108 stores the generated charge through the converter A 104 for utilization by the load 116 attached to the converter B 106. The converter B 106 converts the direct current stored in the battery 108 into alternating current for utilization by the load 116. The converter B 106 is in continuous communication with the converter A 104 for smooth functioning.
[0038] The GUI 110 is installed in a computing device. In an example, the computing device is a portable computing device. In an example, the portable computing device includes laptop, smart phone, tablet, smart watch, and the like. In another embodiment of the present disclosure, the computing device is a fixed computing device. In an example, the fixed computing device includes a desktop, a workstation PC, mainframe, and the like.
[0039] The computing device performs computing operations based on a suitable operating system installed inside the computing device. In general, operating system is system software that manages computer hardware and software resources and provides common services for computer programs. In addition, the operating system acts as an interface for software installed inside the computing device to interact with hardware components of the computing device.
[0040] In an embodiment of the present disclosure, the operating system installed inside the computing device is a mobile operating system. In an

embodiment of the present disclosure, the computing device performs computing operations based on any suitable operating system designed for the portable computing device. In an example, the mobile operating system includes but may not be limited to Windows operating system from Microsoft, Android operating system from Google, iOS operating system from Apple, Symbian operating system from Nokia, Bada operating system from Samsung Electronics and BlackBerry operating system from BlackBerry. However, the operating system is not limited to above mentioned operating systems. In an embodiment of the present disclosure, the computing device operates on any version of particular operating system of above-mentioned operating systems.
[0041] In another embodiment of the present disclosure, the computing device performs computing operations based on any suitable operating system designed for fixed computing device. In an example, the operating system installed inside the computing device is Windows from Microsoft. In another example, the operating system installed inside the computing device is macOS from Apple. In yet another example, the operating system installed inside the computing device is Linux based operating system. In yet another example, the operating system installed inside the computing device may be one of UNIX, Kali Linux, and the like. However, the operating system is not limited to above mentioned operating systems. In an embodiment of the present disclosure, the computing device operates on any version of particular operating system of above-mentioned operating systems.
[0042] FIG. 2 illustrates a block diagram of a computing device 200, in accordance with various embodiments of the present disclosure. The hardware elements of the computing device 200 are identical to hardware elements of the converter B 106. The computing device 200 includes a bus 202 that directly or indirectly couples the following devices: a

memory 204, one or more processors 206, one or more presentation components 208, one or more input/output (I/O) ports 210, one or more input/output components 212, and an illustrative power supply 214. The bus 202 represents what may be one or more busses (such as an address bus, data bus, or combination thereof). Although the various blocks of FIG. 2 are shown with lines for the sake of clarity, in reality, delineating various components is not so clear, and metaphorically, the lines would more accurately be grey and fuzzy. For example, one may consider a presentation component such as a display device to be an I/O component. Also, processors have memory. The inventors recognize that such is the nature of the art, and reiterate that the diagram of FIG. 2 is merely illustrative of an exemplary computing device 200 that can be used in connection with one or more embodiments of the present invention. The distinction is not made between such categories as "workstation," "server," "laptop," "hand-held device," etc., as all are contemplated within the scope of FIG. 2 and reference to "computing device."
[0043] The computing device 200 typically includes a variety of computer-readable media. The computer-readable media can be any available media that can be accessed by the computing device 200 and includes both volatile and nonvolatile media, removable and non-removable media. By way of example, and not limitation, the computer-readable media may comprise computer storage media and communication media. The computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, program modules or other data. The computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage

devices, or any other medium which can be used to store the desired information and which can be accessed by the computing device 200. The communication media typically embodies computer-readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media. The term "modulated data signal" means a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. By way of example, and not limitation, communication media includes wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media. Combinations of any of the above should also be included within the scope of computer-readable media.
[0044] The memory 204 includes computer-storage media in the form of volatile and/or nonvolatile memory. The memory 204 may be removable, non-removable, or a combination thereof. Exemplary hardware devices include solid-state memory, hard drives, optical-disc drives, etc. The computing device 200 includes the one or more processors that read data from various entities such as the memory 204 or I/O components 212. The one or more presentation components 208 present data indications to a user or other device. Exemplary presentation components include a display device, speaker, printing component, vibrating component, etc. The one or more I/O ports 210 allow the computing device 200 to be logically coupled to other devices including the one or more I/O components 212, some of which may be built in. Illustrative components include a microphone, joystick, game pad, satellite dish, scanner, printer, wireless device, etc.
[0045] The foregoing descriptions of specific embodiments of the present technology have been presented for purposes of illustration and

description. They are not intended to be exhaustive or to limit the present technology to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the present technology and its practical application, to thereby enable others skilled in the art to best utilize the present technology and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the spirit or scope of the claims of the present technology.


We Claim:

1. A method for estimating current required in a battery (108), the method
comprising:
charging, at a solar power conditioning unit (100), the battery (108) with execution of an estimation algorithm by an converter A (104), wherein the converter A (104) is connected to the battery (108);
performing, at the solar power conditioning unit (100), a smart bi-directional communication between the converter B and the converter A for estimating and limiting charging current of the battery during backup, wherein the smart bi-directional communication is performed through a network; and
allowing, at the solar power conditioning unit (100), a user to set charging load current of the battery (108) with utilization of a GUI (110), wherein the GUI (110) is installed inside a computing device associated with the solar power conditioning unit (100).
2. The method as claimed in claim 1, further comprising generating electrical energy from solar energy with facilitation of a solar panel (102) at the solar power conditioning unit (100), wherein the solar panel comprises one or more photo-voltaic cells.
3. The method as claimed in claim 1, further comprising storing generated electrical energy in the battery (108) for utilization by an converter B (106) at the solar power conditioning unit (100);
4. The method as claimed in claim 1, wherein the smart bi-directional communication between the converter B (106) and the converter A (104)

facilitates sharing of charging load current for optimum use from an converter B (106).
5. The method as claimed in claim 1, wherein the converter B (106) is utilized for converting a DC current stored in the battery (108) to an AC current, wherein the AC current is utilized by a load connected to an converter B (106).
6. The method as recited in claim 1, wherein the converter B (106) connects to the converter A (104) for internal and continuous control and communication.
7. The method as claimed in claim 1, wherein the GUI (110) facilitates operating of the solar conditioning unit (100) by distributing charging current to the battery (108) based on charging load current set by the user, wherein the GUI (110) facilitates the user for operating the solar power conditioning unit (100).
8. The method as claimed in claim 1, wherein the GUI (110) is used in cohesion with the estimation algorithm to eliminate use of an external hall effect sensor to limit charging current required by the battery (108).
9. The method as claimed in claim 1, wherein the converter A (104) is a sensor-less A that contributes towards longevity of the battery (108).