CN113571799A - Energy storage liquid cooling battery package - Google Patents
Energy storage liquid cooling battery package Download PDFInfo
- Publication number
- CN113571799A CN113571799A CN202110810581.5A CN202110810581A CN113571799A CN 113571799 A CN113571799 A CN 113571799A CN 202110810581 A CN202110810581 A CN 202110810581A CN 113571799 A CN113571799 A CN 113571799A
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- Prior art keywords
- liquid cooling
- side liquid
- battery
- battery pack
- energy storage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention belongs to the technical field of power batteries, and particularly relates to an energy storage liquid cooling battery pack. The battery module fixing device comprises a bottom liquid cooling plate and a plurality of battery modules arranged on the bottom liquid cooling plate, wherein the plurality of battery modules are bound together through fixing belts; all be equipped with side liquid cooling board in each battery module, a plurality of side liquid cooling boards are parallelly connected. The battery module comprises a plurality of battery cells which are respectively arranged at two sides of the side liquid cooling plate; a plurality of electric cores are connected in series in sequence through the connecting row. According to the invention, the bottom liquid cooling plate is used for mainly dissipating heat, and the side liquid cooling plate plays a role in temperature equalization, so that the temperature difference between the upper part and the lower part of the battery pack is obviously reduced, the temperature consistency of the battery pack is improved, and the energy density of the battery pack is improved, thereby achieving the purpose of high-rate operation.
Description
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to an energy storage liquid cooling battery pack.
Background
With the rapid development of economy, the demand of various industries on electricity is increasing. At present, container type energy storage products are developed gradually maturely, and have urgent needs for improving the energy density of container type energy storage, and the liquid cooling can improve the energy density of the container type energy storage and can also ensure the temperature consistency of the battery pack.
In the prior art, the energy storage battery pack mainly adopts air cooling, and the consistency of air cooling temperature is poor due to physical parameters such as low specific heat capacity, low density, poor heat conduction and the like of air; traditional battery package also has the mode that adopts the liquid cooling to dispel the heat, generally all is the technical scheme who uses for reference power battery, at battery package bottom cooling, and this kind of mode one-way heat conduction, the heat conductivility is poor, and the upper and lower difference in temperature is very big during heating or heat dissipation. At present, the battery pack adopting liquid cooling is mostly a large battery core, the height of the battery core is higher, and the larger the height is, the larger the temperature difference is. Therefore, the temperature difference between the upper part and the lower part is large due to the unidirectional heat transfer at the bottom, so that the problems that the temperature consistency of the battery pack is poor and the battery pack cannot run at high multiplying power are caused.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an energy storage liquid-cooled battery pack, so as to solve the problems that the temperature uniformity of the battery pack is poor and the battery pack cannot operate at high rate due to the large temperature difference caused by the unidirectional heat transfer of the existing liquid-cooled battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides an energy storage liquid cooling battery pack, which comprises a bottom liquid cooling plate and a plurality of battery modules arranged on the bottom liquid cooling plate, wherein the battery modules are bound together through a fixing belt; each all be equipped with side liquid cooling plate in the battery module, it is a plurality of side liquid cooling plate connects in parallel.
In one possible implementation manner, the battery module includes a plurality of battery cells, and the plurality of battery cells are respectively arranged on two sides of the side liquid cooling plate; the plurality of battery cores are sequentially connected in series through the connecting row.
In a possible implementation manner, clamping plates are arranged at two ends of the battery module along the length direction, and the clamping plates are bound with the battery core through the fixing belts.
In one possible implementation, the side liquid cooling plate is provided with a side liquid cooling plate water outlet and a side liquid cooling plate water inlet;
side liquid cooling plate water outlets of the side liquid cooling plates are connected in parallel;
and the side liquid cooling plate water inlets of the side liquid cooling plates are connected in parallel.
In one possible implementation, the side liquid cooling plate water outlet and the side liquid cooling plate water inlet are located on the same side of the side liquid cooling plate, the side liquid cooling plate water outlet is located on the upper portion of the side liquid cooling plate, and the side liquid cooling plate water inlet is located on the lower portion of the side liquid cooling plate.
In one possible implementation, the height of the side liquid cooling plate is the same as the height of the battery cell.
In one possible implementation, the thickness of the side liquid cooling plate is less than the thickness of the bottom liquid cooling plate.
In one possible implementation manner, a plurality of the battery modules are sequentially connected in series through a main connection bank.
In a possible implementation manner, a heat-conducting adhesive layer is encapsulated between every two adjacent battery modules.
In one possible implementation, the fixing band is a steel band or an aluminum band.
According to the energy storage liquid cooling battery pack provided by the embodiment of the invention, the bottom liquid cooling plate is used as the main cooling plate, and the side liquid cooling plate plays a role in temperature equalization, so that the temperature difference between the upper part and the lower part of the battery pack is obviously reduced, the temperature consistency of the battery pack is improved, the energy density of the battery pack is improved, and the purpose of high-rate operation is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an energy storage liquid-cooled battery pack according to an embodiment of the invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is an isometric view of an energy storage liquid cooled battery pack in an embodiment of the invention;
fig. 4 is an exploded view of a plurality of battery modules according to an embodiment of the present invention;
fig. 5 is an isometric view of a single battery module in the practice of the invention;
fig. 6 is a schematic structural diagram of a battery cell in an embodiment of the present invention;
in the figure: 1 is electric core, 2 is the fixed band, 3 is side liquid cooling board delivery port, 4 is side liquid cooling board, 5 is side liquid cooling board water inlet, 6 is bottom liquid cooling board, 7 is the run-on board, 8 is total run-on board, 9 is the splint, 10 is the battery module, 11 is the heat-conducting adhesive layer, 12 is total positive pole, 13 is total negative pole, 14 is total feed liquor pipe, 15 is total drain pipe.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
According to the energy storage liquid cooling battery pack provided by the embodiment of the invention, the bottom liquid cooling is adopted to play a main role in heat dissipation, and the side liquid cooling plays a role in temperature equalization, so that the temperature difference between the upper part and the lower part of the battery pack is obviously reduced, the temperature consistency of the battery pack is improved, and the purpose of high-rate operation is realized. Referring to fig. 1 to 3, the energy storage liquid-cooled battery pack comprises a bottom liquid-cooled plate 6 and a plurality of battery modules 10 arranged on the bottom liquid-cooled plate 6, wherein the plurality of battery modules 10 are bound together by a fixing band 2, so that the overall structural stability of the battery pack is improved; all be equipped with side liquid cooling plate 4 in each battery module 10, a plurality of side liquid cooling plates 4 are parallelly connected, make the flow in each side liquid cooling plate 4 the same, can guarantee the uniformity of the difference in temperature between side liquid cooling plate 4, and then reduced the difference in temperature between the battery module 10, improved the cooling effect.
Referring to fig. 2 and 3, in the embodiment of the invention, each battery module 10 is provided with the total connection bar 8, and the plurality of battery modules 10 are connected in series in sequence through the total connection bar 8 to form a battery pack with a total positive electrode 12 and a total negative electrode 13 and high energy density. Further, as shown in fig. 4, a heat-conducting adhesive layer 11 is encapsulated between two adjacent battery modules 10, and the heat-conducting adhesive layer 11 specifically adopts heat-conducting silicone grease, so that the interior of the battery pack is uniformly heated, and the temperature field consistency of the battery pack is improved. Because the heat-conducting silicone grease has elasticity and mechanical property, the defect of rigid contact between battery modules in the traditional battery pack is overcome, the buffer effect is achieved, the influence of external impact on internal batteries and components is reduced, and the anti-seismic property of the battery pack is improved. And because the heat-conducting silicone grease has stronger hydrophobicity, the heat-conducting adhesive layer 11 encapsulated between two adjacent battery modules 10 can also achieve the effect of protecting internal electronic elements from water or vapor erosion, and the waterproof and dustproof performance of the battery pack is improved.
Referring to fig. 4, 5, and 6, in an embodiment of the present invention, a battery module 10 includes a plurality of battery cells 1, the battery cells 1 are respectively arranged on two sides of a side liquid cooling plate 4, positive electrodes and negative electrodes of the battery cells 1 located on the same side of the side liquid cooling plate 4 are sequentially connected in series through a connection bar 7, and then are connected in series with the battery cells 1 on the other side, so as to form a single battery module 10 formed by connecting the plurality of battery cells 1 in series.
In the embodiment of the invention, referring to fig. 2 and 5, the clamping plates 9 are arranged at two ends of the battery module 10, the clamping plates 9 are perpendicular to the side liquid cooling plate 4, and the clamping plates 9 at two sides can improve the structural stability of the battery module 10. Referring to fig. 3, the side liquid cooling plates 4 are provided with side liquid cooling plate water outlets 3 and side liquid cooling plate water inlets 5, and the side liquid cooling plate water outlets 3 of the plurality of side liquid cooling plates 4 are connected in parallel and then connected with the main liquid outlet pipe 15; the side liquid cooling plate water inlets 5 of the plurality of side liquid cooling plates 4 are connected with the total liquid inlet pipe 14 after being connected in parallel, so that the flow in the three side liquid cooling plates 4 is the same, the consistency of the temperature difference between the side liquid cooling plates 4 can be ensured, the temperature difference between the battery modules 10 is further reduced, and the cooling effect is improved.
Further, the side liquid cooling plate water outlet 3 and the side liquid cooling plate water inlet 5 are located on the same side of the side liquid cooling plate 4, so that the integration level is improved, the size is reduced, the overall structure performance is good, the inlet and outlet design of the integrated type improves the safety reliability and the assembly performance of the battery pack, and the production beat and the production efficiency are improved.
Furthermore, the water outlet 3 of the side liquid cooling plate is positioned at the upper part of the side liquid cooling plate 4, and the water inlet 5 of the side liquid cooling plate is positioned at the lower part of the side liquid cooling plate 4, so that cooling water flows from bottom to top, the problems of high temperature at the lower part of the electric core 1 and large temperature difference between the top and the bottom are solved, the heat dissipation efficiency can be further improved, and heat generated by the electric core 1 can be dissipated in time; and meanwhile, the temperature difference between the upper part and the lower part of the battery cell 1 is balanced.
Referring to fig. 6, in the embodiment of the present invention, the height of the battery cell 1 is relatively high, so that the temperature difference between the upper side and the lower side is relatively large, and the temperature difference between the upper side and the lower side can be effectively balanced after the side liquid cooling plate 4 is used. Further, the height of the side liquid cooling plate 4 is the same as that of the battery cell 1, so that the side surface of the battery cell 1 is in full contact with the side liquid cooling plate 4, and the cooling effect is improved.
In the embodiment of the invention, the bottom liquid cooling plate 6 is provided with three battery modules 10, and the three battery modules 10 are bound together by the two fixing belts 2 arranged up and down, so that the overall structure of the battery pack is more stable. Specifically, the fixing band 2 is a steel band or an aluminum band. Because the surface of the battery module 10 is uneven and has a cambered surface, the surface contact of two adjacent battery modules 10 is not good, after the two adjacent battery modules 10 are bound by the fixing belt 2, the adjacent battery modules 10 are in full contact, and the temperature field consistency of the battery pack is further improved. Simultaneously, bind the back through fixed band 2, make electric core 1 and the side liquid cooling plate 4 full contact of the inboard liquid cooling plate 4 both sides of each battery module 10 to improve electric core 1's radiating effect.
Further, three side liquid cooling plate water inlets 5 of three side liquid cooling plates 4 are connected with a total liquid inlet pipe 14 after being connected in parallel, and three side liquid cooling plate water outlets 3 are connected with a total liquid outlet pipe 15 after being connected in parallel, so that the flow in the three side liquid cooling plates 4 is the same, the consistency of the temperature difference between the side liquid cooling plates 4 can be ensured, the temperature difference between the battery modules 10 is further reduced, and the cooling effect is improved.
Further, the thickness of the side liquid-cooled plate 4 is smaller than the thickness of the bottom liquid-cooled plate 6. Because of bottom liquid cooling board 6 plays main radiating effect, through increasing its thickness, improve the flow of cooling water in bottom liquid cooling board 6 to improve the radiating effect in bottom. The thickness of the side liquid cooling plate 4 is relatively thin, so that the purpose of balancing the internal temperature can be achieved, and the temperature difference between the upper part and the lower part of the battery pack is reduced.
According to the energy storage liquid cooling battery pack provided by the embodiment of the invention, the bottom liquid cooling plate is adopted for mainly dissipating heat, and the side liquid cooling plate plays a role in temperature equalization, so that the temperature difference between the upper part and the lower part of the battery pack is obviously reduced, the temperature consistency of the battery pack is improved, the energy density of the battery pack is improved, and the purpose of high-rate operation is realized.
Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The energy storage liquid cooling battery pack is characterized by comprising a bottom liquid cooling plate (6) and a plurality of battery modules (10) arranged on the bottom liquid cooling plate (6), wherein the battery modules (10) are bound together through fixing belts (2); all be equipped with side liquid cooling board (4) in each battery module (10), a plurality of side liquid cooling board (4) are parallelly connected.
2. The energy storage liquid-cooled battery pack according to claim 1, wherein the battery module (10) comprises a plurality of battery cells (1), and the plurality of battery cells (1) are respectively arranged on two sides of the side liquid-cooled plate (4); the plurality of battery cores (1) are sequentially connected in series through a connecting bar (7).
3. The energy storage liquid-cooled battery pack according to claim 2, wherein clamping plates (9) are respectively arranged at two ends of the battery module (10) in the length direction, and the clamping plates (9) are bound with the battery core (1) through the fixing belt (2).
4. The energy storage liquid cooled battery pack of claim 2, wherein the side liquid cooled plate (4) is provided with a side liquid cooled plate water outlet (3) and a side liquid cooled plate water inlet (5);
the side liquid cooling plate water outlets (3) of the side liquid cooling plates (4) are connected in parallel;
and the side liquid cooling plate water inlets (5) of the plurality of side liquid cooling plates (4) are connected in parallel.
5. The energy storage liquid cooled battery pack of claim 4, wherein the side liquid cooled plate water outlet (3) and the side liquid cooled plate water inlet (5) are located on the same side of the side liquid cooled plate (4), and wherein the side liquid cooled plate water outlet (3) is located on the upper portion of the side liquid cooled plate (4) and the side liquid cooled plate water inlet (5) is located on the lower portion of the side liquid cooled plate (4).
6. The energy storing liquid cooled battery pack according to claim 2, characterized in that the height of the side liquid cooled plate (4) is the same as the height of the electric core (1).
7. The energy storage liquid cooled battery pack of claim 1, wherein the side liquid cooled plates (4) have a thickness less than the thickness of the bottom liquid cooled plate (6).
8. The energy storage liquid-cooled battery pack according to claim 1, characterized in that a plurality of the battery modules (10) are connected in series one after the other by a main connection bank (8).
9. The energy storage liquid-cooled battery pack according to claim 1, wherein a heat conducting glue layer (11) is encapsulated between two adjacent battery modules (10).
10. The energy storage liquid cooled battery pack according to claim 1, wherein the securing strap (2) is a steel or aluminum strap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810581.5A CN113571799A (en) | 2021-07-15 | 2021-07-15 | Energy storage liquid cooling battery package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810581.5A CN113571799A (en) | 2021-07-15 | 2021-07-15 | Energy storage liquid cooling battery package |
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| Publication Number | Publication Date |
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| CN113571799A true CN113571799A (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110810581.5A Pending CN113571799A (en) | 2021-07-15 | 2021-07-15 | Energy storage liquid cooling battery package |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284643A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Multi-row module structure |
| CN115548563A (en) * | 2022-10-25 | 2022-12-30 | 楚能新能源股份有限公司 | Modular battery plug-in box structure, battery and module assembling method |
| CN115692932A (en) * | 2022-11-15 | 2023-02-03 | 重庆三峡时代能源科技有限公司 | Heavy truck power battery pack |
| CN118248998A (en) * | 2024-05-27 | 2024-06-25 | 山东电工时代能源科技有限公司 | Liquid cooling energy storage battery device of side liquid cooling mode |
-
2021
- 2021-07-15 CN CN202110810581.5A patent/CN113571799A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284643A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Multi-row module structure |
| CN115548563A (en) * | 2022-10-25 | 2022-12-30 | 楚能新能源股份有限公司 | Modular battery plug-in box structure, battery and module assembling method |
| CN115692932A (en) * | 2022-11-15 | 2023-02-03 | 重庆三峡时代能源科技有限公司 | Heavy truck power battery pack |
| CN118248998A (en) * | 2024-05-27 | 2024-06-25 | 山东电工时代能源科技有限公司 | Liquid cooling energy storage battery device of side liquid cooling mode |
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