Claims:We claim:
1. A portable power system comprising:
o a housing including;
o a plurality of walls defining an area, wherein at least one of the wall includes a first and second inputs receiving a DC or AC charge and an AC and DC output simultaneously;
o a base member adapted to couple with the plurality of side walls;
o a plurality of power sources giving AC power from the first and second inputs;
o a battery management system secured to the base member with an integrated DC to AC invertor; and
o a plurality of thermal interface material adapted to couple to the plurality of power sources, wherein the plurality of thermal interface material is configured to dissipate excess heat to an outside of the housing.
2. The portable power system of claim 1, wherein the plurality of power sources include lithium-ion batteries.
3. The portable power system of claim 1, wherein the housing is made up of stainless steel/ aluminium or any thermally conductive material.
4. The portable power system of claim 1, wherein the battery management system includes a number of temperature sensors.
5. The portable power system of claim 1, wherein the output provides DC and AC charge.
6. The portable power system of claim 1, wherein the battery management system provides a protection circuit.
7. The portable power system of claim 1, wherein the thermal interface material is made up of a material such as a thermal pad, a pyrolytic graphite sheet, a heat spreader and the like.
8. The portable power system of claim 1, wherein the thermal interface material is phase change material coupled with air cooling to achieve active battery thermal management system.
DATED: 30th Day of October, 2020
AGENT FOR APPLICANT
Dr. Suryawanshi Mohini K.
(IN/PA-2023)

, Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10 and rule 13]

1. TITLE OF THE INVENTION
A PORTABLE POWER SYSTEM

2. APPLICANT:

(a) Name : RANJANS LI-ON ENERGY PRIVATE LIMITED
(b) Nationality : An Indian registered company
(c) Address : Gat No. 1313, Near Dutt Mandir, Wadki, Pune Saswad Road,
Pune- 412308, Maharashtra, India.

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.
Technical Field:
[0001] The present invention relates to a power device under emergency backup power requirements. More particularly, this invention discloses a portable power system.
Background:
[0002] The concept of charging of electronic devices requires power sources. Batteries in these devices may not likely to last long with its increasing functionality. The electronic devices are small and portable, so require portable charging unit as well for multi applications and for convenience too. The current portable devices include multiple components that are essential for the functionality of the portable devices. These components are electronics, electrical, semi-electronics or mechatronics. The purpose of the portable device is to serve the emergency power backup to the electronic device such as laptops, desktops, printers, mobile phones, medical equipments etc. and/or electrical devices such as tube lights, LED lamps, small fans etc. at no power condition.
[0003] U.S. Patent Number 9,099,892 discloses a portable power system for charging of multiple devices. The power system includes an electric battery and an enclosure configured to surround the electric battery. A console is disposed on at least one side of the enclosure. The console includes a first charge input configured to receive a charge from an AC power source, a second charge input configured to receive a charge from a DC power source, and an outlet configured to receive a connector for a device. A battery management system includes controls to regulate a battery charge between the first charge input and the second charge input.
[0004] The problem with the current designs of portable power system mentioned above is the lack of heat extraction system. The power system may generate heat during their functionality and adversely affect life span of batteries held within the portable power system. So, a need exists for a portable power device that overcome the above mentioned issues and provides a system that has better thermal or heat extraction system.
Summary of the Invention:
[0005] A portable power system used to provide back-up power during shortage of grid electricity, disturbance in grid or no access to grid or during travel, etc. The power system includes a housing that secures the multiple components. The housing includes a plurality of walls defining an area. The at least one of the wall includes a first and second inputs receiving a DC charge and an output. The power system includes a plurality of power sources receiving power from the first and second inputs. A battery management system secured to the battery with an integrated DC to AC invertor. The portable power system is used to power simultaneously and/or individually various AC or DC devices. The power system includes a plurality of thermal interface material adapted to couple to the plurality of power sources or battery packs. The plurality of thermal interface material is configured to dissipate excess heat out of the housing. The active thermal management is done by cooling fan, thermal interface material, phase change material, heat sinks, etc.
[0006] An object of the present invention is to provide a portable power system which is made up of stainless steel/Aluminium or any material with good thermal conductivity.
[0007] Another object of the present invention is to provide the plurality of power sources includes lithium-ion batteries.
[0008] Yet another object of the present invention is to provide a battery management system which includes a number of temperature sensors.
[0009] Another object of the present invention is to provide a portable power system having the output which provides DC and AC power.
[0010] Yet another object of the present invention is to provide a portable power system having an effective battery management system which provides a protection to battery.
[0011] Yet another object of the present invention is to provide a portable power system having a thermal interface material such as a thermal pad, a pyrolytic graphite sheets, a heat spreader, and a phase change material and the like.
[0012] Other features and aspects of this invention will be apparent from the following description and the accompanying drawings.
Brief description of the Drawings:
[0013] FIG. 1 illustrates a perspective view of a portable power system in accordance with the present invention;
[0014] FIG. 2 illustrates a top view of the portable power system of FIG. 1 in accordance with the present invention;
[0015] FIG. 3 and 4 illustrates front and side views of the portable power system of FIG.1 in accordance with the present invention.
.

Detailed Description:
[0016] The foregoing objects of the present invention are accomplished by the present invention as described below in the preferred embodiments.
[0017] Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. FIG. 1 refers to a portable power system. The portable power system includes a housing (15). The housing (15) includes an inside and an outside. The inside of the housing (15) may include FRP sheets or electric insulating sheets. The housing (15) is made up of stainless steel/Aluminium or any material with good thermal conductivity. The housing (15) includes a number of walls defining an area. The number of walls includes a pair of side wall. The number of walls further includes a pair of front and rear walls. The one or more side wall include a first and second inputs receiving a DC charge and an output AC and DC. The front and second outputs are universal AC sockets (7). The first and second outputs may be capable of charging the portable power system. The power input using a 12V or 24 VDC nominal renewable energy sources such as solar, wind, hydro-turbine, manual generators and the like charges the power system or battery. The portable power system may accept charges from renewable power sources such as solar panels, wind turbines and other known power sources. The output may also include one or more of 120 VAC, 220 VAC, 5 VDC, 12 VDC or 24 VDC that may be connected. The portable power system may include multiple outputs for charging of other devices. The outputs may be an AC or DC outputs. Multiple devices may be charged simultaneously and/or individually.
[0018] The front wall includes the first and second outputs the AC and DC power output. In this embodiment, the first and second outputs are universal AC socket (7). The front wall includes an enclosure (17). The enclosure (17) provides protection to the front wall of the housing (15). The front wall is coupled to a fan (9). In this embodiment, the fan (9) is an air cooling fan. In some other embodiments, the fan (9) may perform other functions known or used in the art. In some other embodiments, the fan (9) may be replaced by a heat sink, or a thermal interface device, phase change material. The front wall includes one or more air vents (13, 16). The front wall further includes fan vents (16). The number of vents (13, 16) and the fan (9) vents allow the heat dissipated by the thermal interface material (4) to get out of the housing (15) of the portable power source (1). In some other embodiments, the number of vents (13, 16) may be replaced by number of slots, reticulate membrane. The front wall includes a switch (10) that provides power connect or disconnect from the portable power system. The switch (10) may include two positions such as “on” and “off” positions. The front wall further includes an indicator (12). In this embodiment, the indicator (12) is the light emitting diode (LED). The indicator (12) may appear red while the portable power source is charging and may turns green when the charge is complete. In some other embodiments, the indicator (12) may include an audio-visual indicator or display. The charger may be programmed to automatically switch (10) off when the charge is complete. The front wall includes a universal serial bus (USB) for charging mobile phones, tablets etc.(8).
[0019] The rear wall of the housing (15) includes a circuit breaker (11). The housing (15) includes a base member coupled with the number of side walls. The whole housing (15) of the portable power system (1) may be covered at a top surface by a top plate (not shown) opposite to the base member. The portable power system includes a battery management system (3) secured to the battery with an integrated DC to AC invertor (2) (described in detail in FIG.2). The battery management system (3) includes controls to allow a battery charge as well battery higher and lower voltage.
[0020] The number of walls may be welded, bolted, threaded together. The portable power system includes a number of power sources (1) receiving power from the first and second inputs. The power sources or battery (1) are in contact with the thermal interface material. In this embodiment, each power source includes a combination of four batteries. In this embodiment, the power sources (1) are four in number which comprises the battery pack. The number of power sources (1) includes top and side surfaces. In some other embodiments, the number of power sources (1) may vary as the requirements. In this embodiment, the batteries (1) are lithium-ion batteries. In some other embodiments, the batteries (1) may be one or more of an aluminium ion battery, a carbon battery, a lead-acid battery. Further the number of power sources (1) includes a number of a thermal interface material (4) coupled to the number of power sources (1). In some other embodiments, the batteries (1) may be prismatic cells, cylindrical cells, pouch cells or custom designed cells with different cell chemistries such as NMC,LFP,NCA,LCO,LTO and other chemistries by which shape, size and weight may be optimized. The power sources (1) may include a single battery pack composed of single cells in series, or a pack assembled from multiple cells assembled in different series or parallel configurations to determine the battery capacity. A battery control module / battery management system may be provided with the power sources (1) protecting the battery from damage due to over-discharging (low voltage disconnect), over charging, and/or balances the batteries during charging and/or provides an over-temperature means of disconnecting the battery from the charging and discharging circuits. The battery protection module may prevent hazardous battery conditions and to maximize or extend the battery life. In this embodiment, the thermal interface material (4) is four in numbers. In some other embodiments, the number of thermal interface material (4) may vary as per the requirements. In this embodiment, the numbers of thermal interface materials (4) are provided at the top surfaces as well as bottom surface of the power sources (Battery cell) (1). In some other embodiments, number of thermal interface materials (4) may be placed at other sides of the power sources (1). In some other embodiments, the thermal interface (4) may be provided at the top as well as side surfaces of the power sources (1). The thermal interface material (4) may be connected to the number of power sources (1) with some thermal adhesives, thermal grease and the like. The Details of the thermal interface material (4) is described in FIG. 2.
[0021] FIG. 2 illustrates a top view of the portable power system. The integrated DC TO AC inventor includes an invertor DC input and an invertor AC output. The battery management system (BMS) (3) is connected to battery pack (not shown). The battery management system (3) attached to the housing (15) of the portable power system (1). The BMS (3) / protection circuit is connected to the built-in lithium battery to control charging and discharging, cell balancing and battery protection. The power sources (1) are controlled and protected by BMS (3) whether hardware BMS or software BMS, embedded or programmable performing, passive or active cell balancing depends on state of charge, state of health, temperature etc.
[0022] The battery management system (3) includes a number of thermal sensors (not shown). The thermal sensors detect temperature rise because of heat dissipated through the number of power sources (1). As the percentage of heat dissipated exceeds a particular level, the number of thermal interface materials (4) transfers heat to the housing by conduction. Thus, the thermal interface material (4) transfers heat produced by the number of power sources (1) to the outside of the housing (15) through the fan as well (9). More particularly, thermal interface material (4) dissipates heat generated by the number of power sources (1) to the outside of the housing (15) to keep battery temperature within a range of 25°C — 35°C to improve the life and capacity of the power sources (1). In this embodiment, the thermal interface material (4) may use material such as a thermal pad, a pyro lytic graphite sheet, a heat spreader and the like. In some embodiments, the thermal interface material (4) may use phase change material (PCM) such as Fill and flow material, or form stable PCM which is in direct contact with the power sources (1) to absorb heat and dissipate based on temperature. The form stable PCM provides additional safety in case of thermal run away by changing phase from solid to vapour. PCM may be cooled by natural convection (passive thermal management) or air cooling (Active thermal management.) In case of thermal management using PCM the housing (15) may be made up of PLA, polycarbonate, ABS etc.
[0023] The heat generated from the thermal interface material (TIM) (4) is dissipated to the outside by the help of the fan (9). The discharged heat is coming out of the power source through the number of vents (13, 16) at the front wall of the portable power system. The fan (9) allows a flow of heat from the number of vents (16) to the outside of the housing (15) in an efficient manner.
[0024] Referring to FIG. 3 and 4 illustrates front and side views of the portable power system. The enclosure (17) of the portable power system protects various components of the portable power system from undesired changes in the system. During dissipation of the heat through the portable power system, the enclosure (17) of the portable power system uncovers the front wall. In some other embodiments, the enclosure (17) may also include a number of corresponding vents and fans to dissipate heat while protecting the switch (10) from undesirable changes. The enclosure (17) may include a press button to cover or expose the front wall of the portable power system. The enclosure (17) may further include some protrusions which may be disturbed to make the enclosure (17) functional in nature.
[0025] The portable power system provides back-up power during shortage of grid electricity, disturbance in grid or no access to grid or during travel, etc.
[0026] The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.