CN222261183U - A cooling system and a battery pack - Google Patents
A cooling system and a battery pack Download PDFInfo
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- CN222261183U CN222261183U CN202420863084.0U CN202420863084U CN222261183U CN 222261183 U CN222261183 U CN 222261183U CN 202420863084 U CN202420863084 U CN 202420863084U CN 222261183 U CN222261183 U CN 222261183U
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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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Abstract
本实用新型属于电池散热技术领域，具体公开了一种冷却系统，包括相变冷却组件和液冷组件。相变冷却组件设置在汇流排上并于远离电池的第一方向延伸，相变冷却组件内部填充有相变介质，通过相变介质吸热后发生相变，以此间接对多个电池的顶部进行冷却。液冷组件设置在多个电池的底部，通过液冷组件能够对电池的底部进行冷却，从而缩小了电池的顶部与底部之间的温差，电池的均温性良好，有利于延长电池的使用寿命。本实用新型还提供一种电池包，包括上述冷却系统，该冷却系统的相变冷却组件可以对电池的顶部进行降温，液冷组件可以对电池的底部同时进行降温，电池顶部与底部之间的温差较小，均温性良好，电池的使用寿命较长，安全性能良好。
The utility model belongs to the technical field of battery heat dissipation, and specifically discloses a cooling system, including a phase change cooling component and a liquid cooling component. The phase change cooling component is arranged on the bus and extends in a first direction away from the battery. The phase change cooling component is filled with a phase change medium, and the phase change occurs after the phase change medium absorbs heat, thereby indirectly cooling the tops of multiple batteries. The liquid cooling component is arranged at the bottom of multiple batteries, and the bottom of the battery can be cooled by the liquid cooling component, thereby reducing the temperature difference between the top and the bottom of the battery. The battery has good temperature uniformity, which is conducive to extending the service life of the battery. The utility model also provides a battery pack, including the above-mentioned cooling system, the phase change cooling component of the cooling system can cool the top of the battery, and the liquid cooling component can cool the bottom of the battery at the same time, the temperature difference between the top and the bottom of the battery is small, the temperature uniformity is good, the battery has a long service life, and the safety performance is good.
Description
Technical Field
The utility model relates to the technical field of battery heat dissipation, in particular to a cooling system and a battery pack.
Background
In recent years, the lithium ion battery has the advantages of high energy density, high charge and discharge efficiency, high response speed and the like due to excellent comprehensive performance, and becomes the fastest-expanding novel energy storage technology at present and is also a main flow route of electrochemical energy storage. As the core requirement of the lithium battery energy storage system, the high safety, low cost and long service life are closely related to the temperature of the lithium battery, so how to effectively control the temperature uniformity of the lithium battery in the use process is a key problem to be solved currently.
The battery pack is used as the minimum integrated unit of the lithium battery energy storage product, and the temperature control technology commonly used at present mainly comprises air cooling and liquid cooling, wherein the liquid cooling is mainly performed in an indirect liquid cooling mode, namely, a liquid cooling plate is arranged at the bottom of the battery pack, and referring to fig. 1, heat of the battery 10 'is indirectly taken away through flowing of fluid media in the liquid cooling plate 11'. However, in the technical scheme, the heat exchange efficiency is not high in an indirect liquid cooling mode, and the heat dissipation is not timely. And because the main position that generates heat of battery 10' is utmost point ear 12', and liquid cooling board 11' arranges in the bottom of battery 10', and battery 10' heat can only dispel the heat through bottom liquid cooling board 11' indirection, can't cool down to utmost point ear 12' position, leads to battery 10' top and bottom's difference in temperature great, and along with the market demand of energy storage high-magnification battery and more several charge and discharge, it is difficult to realize battery 10's difference in temperature management, and battery 10' top temperature can be up to 55 ℃ more, is difficult to maintain at suitable operating temperature, seriously influences battery 10 ''s life and energy storage system's security.
Disclosure of utility model
The utility model aims to provide a cooling system and a battery pack, wherein a heat pipe is arranged at the top of a battery for heat dissipation, and a liquid cooling plate is arranged at the bottom of the battery for heat dissipation, so that the top and the bottom of the battery can realize rapid heat dissipation, the temperature uniformity of the battery is good, the service life is prolonged, and the safety performance is good.
To achieve the purpose, the utility model adopts the following technical scheme:
In one aspect, the present utility model provides a cooling system for dissipating heat from a plurality of batteries, wherein each of the top of each battery includes a tab, and the tabs of two adjacent batteries are connected by a bus bar, the cooling system comprising:
The phase-change cooling assembly is arranged on the bus bar and extends in a first direction away from the battery, a phase-change medium is filled in the phase-change cooling assembly, and the phase-change medium changes phase in the phase-change cooling assembly after absorbing heat of the bus bar;
The liquid cooling assembly is arranged at the bottom of the battery and connected with the bottom of the battery, and a cooling medium flows in the liquid cooling assembly and is used for exchanging heat with the bottom of the battery.
Optionally, the phase change cooling component comprises a plurality of heat pipes, the heat pipes are in one-to-one correspondence with the bus bars, and the bottom end of each heat pipe is connected with one side of the bus bar, which is away from the battery;
In the first direction, the liquid cooling assembly, the plurality of batteries, the plurality of bus bars and the plurality of heat pipes are sequentially arranged.
Optionally, the heat pipe includes a tube shell and a liquid absorption core, a closed accommodating cavity is formed in the tube shell, the liquid absorption core is arranged on the inner wall of the tube shell, the phase change medium is liquid at normal temperature, and the liquid phase change medium is adsorbed on the liquid absorption core.
Optionally, a heat absorbing section, a heat insulating section and a condensing section which are sequentially connected are formed inside the tube shell, and the heat absorbing section is positioned at one end of the tube shell, which is close to the battery.
Optionally, the shell comprises a peripheral side plate, and a top plate and a bottom plate which are arranged at two ends of the peripheral side plate, the liquid suction core is arranged on the peripheral side plate, and the top plate and the bottom plate are round.
Optionally, an insulating weld is formed between the bottom plate of the heat pipe and a side of the busbar facing away from the battery.
Optionally, the liquid cooling assembly includes a liquid cooling plate, the cooling medium flows through the liquid cooling plate, and a plurality of batteries are fixed on the liquid cooling plate.
Optionally, the liquid cooling assembly further comprises a cooling unit, a water inlet pipe and a water return pipe, a water inlet and a water outlet are formed in the liquid cooling plate, two ends of the water inlet pipe are respectively connected with the water inlet and the cooling unit, and two ends of the water return pipe are respectively connected with the water outlet and the cooling unit.
Optionally, a plurality of batteries are stacked in turn along the length direction of the liquid cooling plate, two ends of the plurality of batteries are respectively provided with an end plate, and the end plates are used for fixing the plurality of batteries.
In another aspect, the present utility model provides a battery pack, including a plurality of batteries, and a cooling system in any of the above aspects, wherein the cooling system is used for cooling the top and bottom of the batteries.
The beneficial effects of the utility model are as follows:
The utility model provides a cooling system, which comprises a phase change cooling component and a liquid cooling component. The phase-change cooling assembly is arranged on the busbar and extends in a first direction far away from the batteries, phase-change media are filled in the phase-change cooling assembly, and phase change occurs after heat absorption through the phase-change media, so that the tops of the batteries are cooled indirectly. The liquid cooling subassembly sets up in the bottom of a plurality of batteries, can cool off the bottom of battery through the liquid cooling subassembly to the difference in temperature between the top and the bottom of battery has been reduced, and the samming nature of battery is good, is favorable to prolonging the life of battery.
The utility model also provides a battery pack, which comprises a plurality of batteries and the cooling system, wherein the top of the batteries can be cooled through the heat pipe of the cooling system, the bottom of the batteries can be cooled through the liquid cooling assembly, thermal runaway caused by overhigh temperature of the batteries is avoided, the safety is better, meanwhile, the temperature difference between the top and the bottom of the batteries is smaller, the temperature uniformity is good, and the service life of the batteries is longer.
Drawings
Fig. 1 is a schematic view of a structure of a battery pack according to a conventional art;
Fig. 2 is a schematic structural view of a battery pack provided in an embodiment of the present utility model;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic view of a heat pipe according to an embodiment of the present utility model;
fig. 5 is a cross-sectional view of section B-B of fig. 4.
In the figure:
10', battery, 11', liquid cooling plate, 12', tab;
100. Battery, 110, tab, 120, bus bar, 200, heat pipe, 201, liquid phase change medium, 202, gaseous phase change medium, 210, tube shell, 211, peripheral board, 212, top board, 213, bottom board, 220, liquid absorption core, 300, liquid cooling board, 310, water inlet, 400 and end board.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The present embodiment provides a cooling system, which can be used to simultaneously dissipate heat from the top and the bottom of a plurality of batteries 100, so as to reduce the temperature difference between the top and the bottom of the batteries 100, improve the uniformity of the overall temperature of the batteries 100, and facilitate the extension of the service life of the batteries 100.
As shown in fig. 2 and 3, the top of each battery 100 includes tabs 110, the tabs 110 of two adjacent batteries 100 are connected by a bus bar 120, and the series connection or parallel connection between the adjacent batteries 100 is achieved by the bus bar 120. The cooling system in this embodiment includes a phase change cooling assembly and a liquid cooling assembly. Wherein the phase change cooling element is disposed on the bus bar 120 and extends in a first direction away from the battery 100, as shown in fig. 2, the first direction being a direction from the bottom of the battery 100 toward the top of the battery 100. The heat of the bus bar 120 and the tab 110 can be taken away by the phase change cooling assembly, and the heat of the top of the battery 100 is mostly concentrated at the bus bar 120 and the tab 110, so that the phase change cooling assembly can cool the tops of the plurality of batteries 100. The liquid cooling assembly is arranged at the bottoms of the batteries 100, and the bottoms of the batteries 100 can be cooled through the liquid cooling assembly, so that the temperature difference between the top and the bottom of the batteries 100 is reduced, and the temperature uniformity of the batteries 100 is good.
As an alternative, in this embodiment, the phase-change cooling component is connected to one side of the busbar 120 away from the battery 100, the phase-change cooling component is filled with a phase-change medium, the phase-change medium absorbs heat at the top of the battery 100 (including heat generated by the tab 110 and heat transferred to the busbar 120 by the tab 110) and then turns into a gaseous state, the gaseous phase-change medium 202 diffuses from one end close to the battery 100 to one end far away from the battery 100, condenses at one end far away from the battery 100, and then returns to one end close to the battery 100 again, so that the heat at the top of the battery 100 is taken away, the temperature reduction at the top of the battery 100 is realized, and the heat dissipation effect is good. Further, the liquid cooling assembly is connected with the bottoms of the batteries 100, a cooling medium flows in the liquid cooling assembly, and heat exchange is carried out between the cooling medium and the bottoms of the batteries 100, so that heat at the bottoms of the batteries 100 is taken away, and the bottoms of the batteries 100 are cooled.
Further, the phase-change cooling assembly includes a plurality of heat pipes 200, the plurality of heat pipes 200 are in one-to-one correspondence with the bus bars 120, the bottom end of each heat pipe 200 is connected to one side of the bus bar 120 away from the battery 100, and the phase-change medium undergoes a phase change inside the heat pipe 200 after absorbing the heat of the bus bar 120 and the tab 110. The heat of the top of the battery 100 is indirectly taken away by utilizing the heat dissipation principle of the heat pipe 200, so that the temperature difference between the top and the bottom of the battery 100 is reduced, the temperature uniformity of the battery 100 is maintained, the service life of the battery 100 is prolonged, and the safety performance is improved. And as an alternative, in this embodiment, the liquid cooling assembly, the plurality of batteries 100, the plurality of bus bars 120 and the plurality of heat pipes 200 are sequentially arranged along the first direction in fig. 2, where the plurality of batteries 100 are arranged side by side along the length direction of the liquid cooling assembly, the length direction of the liquid cooling assembly is perpendicular to the first direction, the plurality of bus bars 120 are used for connecting two adjacent batteries 100 in series or parallel, and each bus bar 120 is connected with one heat pipe 200.
Referring to fig. 4 and 5, the heat pipe 200 in this embodiment includes a tube 210 and a wick 220, wherein a closed accommodating cavity is formed in the tube 210, the wick 220 is disposed on an inner wall of the tube 210, the phase-change medium is liquid at normal temperature, and the liquid phase-change medium 201 is adsorbed on the wick 220. Illustratively, the phase change medium that is liquid at normal temperature may be one of hexane, acetone, ethanol, methanol, toluene, or water.
Further, a heat absorbing section, a heat insulating section, and a condensing section, which are sequentially connected, are formed inside the case 210, and the heat absorbing section is located at one end of the case 210 near the battery 100. Specifically, after the heat absorption section absorbs heat, the liquid phase-change medium 201 can be promoted to evaporate into a gas state, the gas phase-change medium 202 is diffused to the condensation section through the heat insulation section and dissipates heat in the condensation section, at this time, the gas phase-change medium 202 is condensed into the liquid phase-change medium 201, and the liquid phase-change medium 201 flows back to the heat absorption section through the liquid suction core 220 on the inner wall of the tube shell 210 for recycling, so that the heat at the top of the battery 100 is continuously dissipated in a recycling manner, the temperature at the top of the battery 100 is reduced, and thermal runaway caused by overhigh local temperature of the battery 100 is avoided.
Optionally, the tube shell 210 is cylindrical and includes a peripheral side plate 211, and a top plate 212 and a bottom plate 213 disposed at two ends of the peripheral side plate 211, where the top plate 212 and the bottom plate 213 are circular, and the peripheral side plate 211 is connected with the top plate 212 and the bottom plate 213 to form a closed accommodating cavity. The wick 220 is disposed on the peripheral plate 211, the heat-absorbing section is disposed on a side close to the bottom plate 213, the condensing section is disposed on a side close to the top plate 212, and a portion between the heat-absorbing section and the condensing section is a heat-insulating section. By arranging the tube shell 210 in a cylindrical shape, the contact area between the condensation section of the heat pipe 200 and the outside is larger, which is favorable for heat dissipation of the heat pipe 200 and quickens heat dissipation.
Illustratively, the bottom plate 213 of the heat pipe 200 is welded with the bus bar 120 at a side facing away from the battery 100 in an insulating manner, so as to fix the heat pipe 200 to the bus bar 120, while ensuring insulation between the heat pipe 200 and the bus bar 120. Specific insulated welding techniques are well known in the art and will not be described in detail herein.
With continued reference to fig. 2, the liquid cooling assembly in this embodiment includes a liquid cooling plate 300, a cooling medium circulates in the liquid cooling plate 300, a plurality of batteries 100 are fixed on the liquid cooling plate 300, the temperature of the cooling medium is lower than the temperature of the bottom of the batteries 100, after the cooling medium exchanges heat with the bottom of the batteries 100, the heat of the bottoms of the batteries 100 is continuously dissipated through the cooling medium in the liquid cooling plate 300, and then the effect of cooling the bottoms of the batteries 100 is achieved.
Further, the liquid cooling assembly further comprises a cooling unit, a water inlet pipe and a water return pipe (not shown in the figure), the liquid cooling plate 300 is provided with a water inlet 310 and a water outlet, two ends of the water inlet pipe are respectively connected with the water inlet 310 and the cooling unit, two ends of the water return pipe are respectively connected with the water outlet and the cooling unit, and a cooling medium circulates in the cooling unit, the water inlet pipe, the liquid cooling plate 300 and the water return pipe. The cooling medium absorbs the heat at the bottom of the battery 100 at the liquid cooling plate 300 and then heats up, and then flows into the cooling unit through the water return pipe, the cooling unit can cool the heated cooling medium, so that the cooling medium entering the liquid cooling plate 300 through the water inlet pipe again can be kept at a lower temperature, and meanwhile, part of the cooling medium can be temporarily stored in the cooling unit. It should be noted that the cooling unit is internally provided with a circulating water pump, and a power source can be provided for the flow of the cooling medium through the circulating water pump. The circulating water pump drives the cooling medium to circulate among the water inlet pipe, the liquid cooling plate 300 and the water return pipe.
With continued reference to fig. 2, a plurality of cells 100 are stacked in sequence along the length direction of the liquid cooling plate 300, and each of both ends of the plurality of cells 100 is provided with one end plate 400, and the end plates 400 are used to fix the plurality of cells 100. Alternatively, the two end plates 400 may be fastened to the liquid cooling plate 300 by bonding or bolting, so that the two end plates 400 clamp and fix the positions of the plurality of cells 100, and the plurality of cells 100 are grouped.
The embodiment also provides a battery pack, including a plurality of batteries 100 to and above-mentioned cooling system, can cool down battery 100's top through this cooling system's heat pipe 200, can cool down battery 100's bottom simultaneously through liquid cooling plate 300, avoided battery 100 high temperature to take place thermal runaway, the security is better, and the difference in temperature between battery 100 top and the bottom is less simultaneously, and the sameness is good, and battery 100's life is longer.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420863084.0U CN222261183U (en) | 2024-04-24 | 2024-04-24 | A cooling system and a battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420863084.0U CN222261183U (en) | 2024-04-24 | 2024-04-24 | A cooling system and a battery pack |
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| CN222261183U true CN222261183U (en) | 2024-12-27 |
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| CN202420863084.0U Active CN222261183U (en) | 2024-04-24 | 2024-04-24 | A cooling system and a battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120749289A (en) * | 2025-09-01 | 2025-10-03 | 能建时代(上海)新型储能技术研究院有限公司 | Thermal management system for battery pack, control method thereof and energy storage system |
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2024
- 2024-04-24 CN CN202420863084.0U patent/CN222261183U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120749289A (en) * | 2025-09-01 | 2025-10-03 | 能建时代(上海)新型储能技术研究院有限公司 | Thermal management system for battery pack, control method thereof and energy storage system |
| CN120749289B (en) * | 2025-09-01 | 2025-12-16 | 能建时代(上海)新型储能技术研究院有限公司 | Thermal management system for battery pack, control method thereof and energy storage system |
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