CN118336268A - Battery cell modules, battery packs and energy storage boxes - Google Patents

Battery cell modules, battery packs and energy storage boxes Download PDF

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Publication number
CN118336268A
CN118336268A CN202410535693.8A CN202410535693A CN118336268A CN 118336268 A CN118336268 A CN 118336268A CN 202410535693 A CN202410535693 A CN 202410535693A CN 118336268 A CN118336268 A CN 118336268A
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CN
China
Prior art keywords
battery
battery cell
shell
heat dissipation
tab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410535693.8A
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Chinese (zh)
Inventor
曾宪荣
吴宇豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jingke Energy Storage Co ltd
Original Assignee
Zhejiang Jingke Energy Storage Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Jingke Energy Storage Co ltd filed Critical Zhejiang Jingke Energy Storage Co ltd
Priority to CN202410535693.8A priority Critical patent/CN118336268A/en
Publication of CN118336268A publication Critical patent/CN118336268A/en
Pending legal-status Critical Current

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

本申请公开了一种电芯模块、电池包及储能箱，该电芯模块包括电芯、外壳和散热件，电芯包括壳体、端盖和电芯本体，电芯本体收容于壳体内，端盖盖合于壳体，外壳具有容纳腔，电芯收容于容纳腔内，端盖还盖合于外壳，且端盖与壳体、外壳分别连接，散热件收容于容纳腔内，且散热件位于壳体的至少两个外侧面。本申请使单个电芯上集成散热件，进而实现了电芯的有效散热与冷却，有利于提高整个电芯模块的散热效果，使整个电芯模块能够在合理的温度下工作。

The present application discloses a battery module, a battery pack and an energy storage box. The battery module includes a battery cell, a shell and a heat sink. The battery cell includes a shell, an end cover and a battery body. The battery body is accommodated in the shell, and the end cover is covered on the shell. The shell has a receiving cavity, and the battery cell is accommodated in the receiving cavity. The end cover is also covered on the shell, and the end cover is connected to the shell and the shell respectively. The heat sink is accommodated in the receiving cavity, and the heat sink is located on at least two outer sides of the shell. The present application integrates a heat sink on a single battery cell, thereby realizing effective heat dissipation and cooling of the battery cell, which is conducive to improving the heat dissipation effect of the entire battery module, so that the entire battery module can work at a reasonable temperature.

Description

Battery core module, battery pack and energy storage box
Technical Field
The application relates to the technical field of lithium ion batteries, in particular to a battery cell module, and a battery pack and an energy storage box comprising the battery cell module.
Background
The lithium ion battery has the advantages of green environmental protection, high energy density, high output voltage, small self-discharge and the like, and is widely applied to various living scenes, such as the automobile industry. Along with the development of scientific technology, the requirements of people on lithium ion batteries are also higher and higher, and especially the requirements on the safety performance of the lithium ion batteries are more urgent.
The battery module often generates more heat during operation, and if the heat is accumulated continuously, the normal operation of the battery module is adversely affected. Therefore, the battery module needs to be subjected to heat dissipation and cooling, so that the battery module works at a proper temperature, and the working stability and reliability of the battery module are ensured.
At present, through the mode that is provided with the liquid cooling board in the bottom of battery module, carry out heat transfer heat dissipation to battery module, however this kind of mode is to battery module whole dispel the heat, and it causes the inhomogeneous condition of temperature easily, and the cooling effect is relatively poor to influence battery module's normal work easily.
Disclosure of Invention
In order to overcome the problems of the prior art, the main object of the present application is to provide a battery cell module, a battery pack and an energy storage box, which can improve the cooling effect of a single battery cell.
In order to achieve the above purpose, the present application specifically adopts the following technical scheme:
the application provides a cell module, which comprises:
The battery cell comprises a shell, an end cover and a battery cell body, wherein the battery cell body is contained in the shell, and the end cover is covered on the shell;
The shell is provided with an accommodating cavity, the battery cell is accommodated in the accommodating cavity, the end cover is covered on the shell, and the end cover is respectively connected with the shell and the shell;
the heat dissipation piece is accommodated in the accommodating cavity and is positioned on at least two outer side surfaces of the shell.
According to the embodiment, the radiating piece is integrated on the single battery cell, so that the effective heat dissipation and cooling of the battery cell are realized, and the heat dissipation effect of the whole battery cell module is improved.
In some embodiments, the heat dissipation elements are provided in plurality, and the plurality of heat dissipation elements are respectively located on the outer surface of the peripheral side part of the shell and the outer surface of the bottom. According to the embodiment, the radiating pieces are arranged on the outer surfaces of the shell, so that heat generated by the battery cell can be conducted to the radiating pieces through the surfaces of the battery cell, the radiating area of the battery cell is further increased, and the battery cell can be cooled rapidly.
In some embodiments, the cell module further comprises a thermally conductive member disposed between the housing and the heat sink. According to the embodiment, the heat conducting piece is arranged between the shell and the heat radiating piece, so that heat generated by the battery cell can be quickly conducted to the heat radiating piece through the heat conducting piece, and the battery cell is quickly cooled. In some embodiments, the thermally conductive member is provided as a thermally conductive pad, a thermally conductive adhesive, or a thermally conductive tape.
In some embodiments, the heat dissipation element is a liquid cooling plate, the cell module further includes a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are respectively connected with the liquid cooling plate, and the liquid inlet pipe and the liquid outlet pipe are respectively arranged in the shell in a penetrating manner. This implementation is through establishing the radiating part as the liquid cooling board, and is connected liquid cooling board and feed liquor pipe, drain pipe to make the liquid cooling board can be connected with outside liquid cooling mechanism through feed liquor pipe, drain pipe, and then can provide the coolant liquid to the liquid cooling board through outside liquid cooling mechanism, the coolant liquid carries out the heat exchange with the electric core again, in order to take away the heat that the electric core produced.
In some embodiments, the cell body includes a tab, and the heat sink covers at least a portion of the tab. According to the embodiment, the heat dissipation piece covers at least part of the area of the tab, so that heat generated by the tab is dissipated, and the temperature of the tab can be reduced rapidly.
In some embodiments, the tab includes a positive tab and a negative tab, the positive tab being made of an aluminum material and the negative tab being made of a copper material;
The contact area of the heat dissipation piece and the positive electrode lug is larger than that of the heat dissipation piece and the negative electrode lug. According to the embodiment, the contact area between the positive electrode tab and the radiating piece is increased, namely, the heat exchange area between the positive electrode tab and the radiating piece is increased, so that heat generated by the positive electrode tab can be rapidly radiated, and further different radiating requirements of the positive electrode tab and the negative electrode tab are met, and a uniform radiating effect is achieved.
In some embodiments, the end cover includes a cover plate, a positive post and a negative post, the cover plate covers the housing and the shell, the cover plate is respectively connected with the housing and the housing, the positive post and the negative post are respectively arranged on the cover plate in a penetrating manner, the positive post is electrically connected with the positive tab, and the negative post is electrically connected with the negative tab.
Correspondingly, the application also provides a battery pack, which comprises a bottom cover, an upper cover and a plurality of battery cell modules according to any embodiment, wherein the upper cover is connected with the bottom cover to form an accommodating space, the battery cell modules are respectively arranged in the accommodating space, and the battery cell modules are electrically connected.
In some embodiments, the battery pack further comprises a liquid cooling assembly, the liquid cooling assembly is disposed in the accommodating space, the heat dissipation member is disposed as a liquid cooling plate, and the liquid cooling plate is connected with the liquid cooling assembly.
Correspondingly, the application provides an energy storage box, which comprises a box body, an energy storage converter, a battery management system and a plurality of battery packs, wherein the battery packs are arranged in any embodiment, the energy storage converter, the battery management system and the battery packs are respectively arranged in the box body, the energy storage converter is electrically connected with the battery packs, and the battery management system is connected with the battery packs and is used for monitoring and controlling the states of the battery packs in real time.
Compared with the prior art, the battery cell module comprises the battery cell, the shell and the heat dissipation piece, the battery cell comprises the shell, the end cover and the battery cell body, the battery cell body is accommodated in the shell, the end cover is covered on the shell, the shell is provided with the accommodating cavity, the battery cell is accommodated in the accommodating cavity, the end cover is covered on the shell, the end cover is respectively connected with the shell and the shell, the heat dissipation piece is accommodated in the accommodating cavity, and the heat dissipation piece is positioned on at least two outer sides of the shell, so that the heat dissipation piece is integrated on a single battery cell, further, the effective heat dissipation and cooling of the battery cell are realized, the heat dissipation effect of the whole battery cell module is improved, the whole battery cell module can work at reasonable temperature, and meanwhile, the cooling structure is not arranged in the battery pack any more, and the space for accommodating the battery cell in the battery pack can be increased.
Drawings
Fig. 1 is a perspective view of a battery cell module according to an embodiment of the present application.
Fig. 2 is an exploded perspective view of a battery cell module according to an embodiment of the present application.
Fig. 3 is an exploded perspective view of the battery cell of fig. 2.
Fig. 4 is an exploded perspective view of a battery module according to another embodiment of the present application.
Fig. 5 is a perspective view of a battery pack according to an embodiment of the present application.
Fig. 6 is an exploded perspective view of the battery pack of fig. 5.
Fig. 7 is a perspective view of an energy storage tank according to an embodiment of the present application.
The attached drawings are identified:
1. A housing; 11. a receiving chamber; 2. a battery cell; 21. a housing; 211. a first side; 212. a second side; 213. a third side; 214. a fourth side; 215. a bottom surface; 22. an end cap; 221. a cover plate; 222. a positive electrode post; 223. a negative electrode column; 23. a cell body; 231. a positive electrode tab; 232. a negative electrode tab; 3. a heat sink; 4. a liquid inlet pipe; 5. a liquid outlet pipe; 100. a cell module; 200. a battery pack; 201. a bottom cover; 202. an upper cover; 203. a battery module; 300. an energy storage tank; 301. a box body.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, and the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, it should be understood that the terms "upper", "lower", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
Referring to fig. 1 and 2, fig. 1 is a perspective view of a battery cell module according to an embodiment of the present application, and fig. 2 is a perspective exploded view of the battery cell module according to the embodiment of the present application. The embodiment of the application discloses a battery cell module 100, which comprises a shell 1, a battery cell 2 and a heat dissipation piece 3, wherein the shell 1 is provided with a containing cavity 11, the battery cell 2 is contained in the containing cavity 11, and the top of the battery cell 2 is connected with the shell 1. The heat sink 3 is accommodated in the accommodation chamber 11 and located at the outer surface of the battery cell 2, i.e., the heat sink 3 is located between the outer surface of the battery cell 2 and the inner surface of the housing 1. According to the embodiment, the heat dissipation piece 3 is integrated on the outer surface of the battery cell 2, so that the cooling effect of the single battery cell 2 can be effectively improved, the cooling effect of the whole battery cell module 100 is improved, and the working stability and reliability of the battery cell module 100 are ensured.
Referring to fig. 3, fig. 3 is an exploded perspective view of the battery cell of fig. 2. The battery cell 2 includes a housing 21, an end cover 22, and a battery cell body 23, where the housing 21 may be a hollow structure with an opening at one end to form a containing portion with an opening, the battery cell body 23 is contained in the containing portion of the housing 21, the end cover 22 covers the opening of the housing 21, and the end cover 22 is connected with the housing 21. The housing 1 may be a hollow structure having one end opened to form a receiving chamber 11 having an opening, the receiving chamber 11 having a volume larger than that of the receiving portion of the case 21. The battery cell 2 is accommodated in the accommodating cavity 11, the end cover 22 is further covered at the opening of the housing 1, and the end cover 22 is further connected with the housing 1, so that the end cover 22 and the housing 1 together define a space for accommodating the battery cell body 23 and the heat dissipation member 3, that is, the battery cell 2 and the housing 1 share one end cover 22, so that the battery cell 2 body and the heat dissipation member 3 are sealed in the accommodating cavity 11 through the housing 1 and the end cover 22, and the battery cell 2 and the heat dissipation member 3 are integrated into a whole through the housing 1. The present embodiment simplifies the structure of the cell module 100 by sharing one end cap 22 for the housing 1 and the cell 2, and facilitates assembly.
With continued reference to fig. 2, in order to improve the heat dissipation effect, the heat dissipation elements 3 are provided in plurality, the plurality of heat dissipation elements 3 are all accommodated in the accommodating cavity 11, part of the heat dissipation elements 3 are disposed around the circumference of the housing 21, and part of the heat dissipation elements 3 are located on the outer surface of the bottom of the housing 21, that is, the plurality of heat dissipation elements 3 are respectively located on the outer surfaces of the peripheral side parts of the housing 21 and the outer surface of the bottom. In this embodiment, the heat dissipation elements 3 are disposed on each outer surface of the housing 21, so that the heat dissipation effect of the single battery cell 2 is improved.
Specifically, the case 21 has a first side 211, a second side 212, a third side 213, a fourth side 214, and a bottom 215, the first side 211, the second side 212, the third side 213, the fourth side 214, and the bottom 215 are connected to each other to enclose a housing portion that can be used to house the cell body 23, the first side 211 and the second side 212 are disposed opposite to each other, and the third side 213 and the fourth side 214 are disposed opposite to each other. The heat dissipation element 3 is located on the first side 211, the second side 212, the third side 213, the fourth side 214 and the bottom 215, and the shape and the area of the heat dissipation element 3 located on the first side 211 are matched with the shape and the area of the first side 211, the shape and the area of the heat dissipation element 3 located on the second side 212 are matched with the shape and the area of the second side 212, the shape and the area of the heat dissipation element 3 located on the third side 213 are matched with the shape and the area of the third side 213, the shape and the area of the heat dissipation element 3 located on the fourth side 214 are matched with the shape and the area of the fourth side 214, and the shape and the area of the heat dissipation element 3 located on the bottom 215 are matched with the shape and the area of the bottom 215.
In some embodiments, two sides of the heat dissipation element 3 located on the first side 211 are respectively in close contact with the inner walls corresponding to the first side 211 and the housing 1, two sides of the heat dissipation element 3 located on the second side 212 are respectively in close contact with the inner walls corresponding to the second side 212 and the housing 1, two sides of the heat dissipation element 3 located on the third side 213 are respectively in close contact with the inner walls corresponding to the third side 213 and the housing 1, two sides of the heat dissipation element 3 located on the fourth side 214 are respectively in close contact with the inner walls corresponding to the fourth side 214 and the housing 1, and two sides of the heat dissipation element 3 located on the bottom 215 are respectively in close contact with the inner walls corresponding to the bottom 215 and the housing 1, so that the heat exchange effect between the heat dissipation element and the battery cell 2 is better, and the battery cell 2 and the heat dissipation element 3 can be more firmly assembled in the housing 1, and shaking of the heat dissipation element 3 during the movement of the battery cell module 100 is prevented.
In this embodiment, the outer surfaces of the peripheral side parts and the outer surfaces of the bottom of the battery cell 2 are both provided with the heat dissipation members 3, and it is understood that in other embodiments, the heat dissipation members 3 may be disposed only on the outer surfaces of the side parts of the battery cell 2, and the heat dissipation members 3 may be disposed on two side surfaces with larger areas of the housing 21, for example.
In order to improve the heat transfer efficiency between the battery cell 2 and the heat sink 3, the battery cell module 100 further includes a heat conducting member (not shown in the figure) disposed between the housing 21 and the heat sink 3, wherein the heat conducting member may be a heat conducting pad, a heat conducting adhesive or a heat conducting tape. In this embodiment, the heat conducting member is disposed between the battery core 2 and the heat dissipating member 3, so that heat generated on the battery core 2 can be quickly conducted to the heat dissipating member 3 through the heat conducting member, and then the heat is taken away through the heat dissipating member 3.
With continued reference to fig. 3, the battery core body 23 includes a battery core assembly and a tab, the battery core assembly is disposed in the housing 21, the tab includes a positive tab 231 and a negative tab 232, and the positive tab 231 and the negative tab 232 are electrically connected with the battery core assembly respectively. The end cover 22 includes a cover plate 221, a positive electrode post 222, a negative electrode post 223, a first insulating sleeve (not shown in the figure) and a second insulating sleeve (not shown in the figure), the cover plate 221 may be shaped to match the shape of the housing 1 to match the housing 1, cover the openings of the housing 21 and the housing 1, and the cover plate 221 is connected to the housing 21 and the housing 1 respectively. The positive pole 222 and the negative pole 223 are respectively arranged on the cover plate 221 in a penetrating way, and the positive pole 222 is electrically connected with the positive pole tab 231, and the negative pole 223 is electrically connected with the negative pole tab 232, so that electric energy is output or input from or into the battery core body 23 through the positive pole 222, the positive pole tab 231, the negative pole 223 and the negative pole tab 232. The first insulating sleeve is arranged on the cover plate 221 in a penetrating manner and sleeved on the positive pole 222, and the second insulating sleeve is arranged on the cover plate 221 in a penetrating manner and sleeved on the negative pole 223, so that short circuit between the positive pole 222 and the negative pole 223 is prevented.
Specifically, the cell assembly is the component of the cell unit in which the electrochemical reaction occurs. One or more battery cell assemblies may be housed within the housing 21. The cell assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally arranged between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode plate and the negative electrode plate with active substances form the main body part of the battery cell assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances form the electrode lugs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. In the charge and discharge process of the battery cell, the positive electrode active material and the negative electrode active material react with the electrolyte, and the electrode lugs are connected with the electrode terminals to form a current loop.
In some embodiments, the cover plate 221 may be made of a material having a certain hardness and strength (e.g., aluminum alloy), so that the end cap 22 is not easily deformed when the end cap is extruded and bumped, so that the cell module 100 can have a higher structural strength and improved safety. Of course, the material of the end cap 22 may be various, such as copper, iron stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.
In some embodiments, the end cap 22 further includes a pressure relief mechanism and an insulator, which may be provided on the cover plate 221, so that the internal pressure may be relieved by the pressure relief mechanism when the internal pressure or temperature of the cell module 100 reaches a threshold. An insulator may be provided inside the cover 221 for isolating the electrical connection components within the housing from the cover to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.
When the battery cell 2 works, the tab and the nearby area can generate larger heat. In order to make the heat dissipation of the battery cell 2 uniform, in this embodiment, the heat dissipation member 3 covers at least a part of the area of the tab, so that the heat generated by the tab is dissipated by making the heat dissipation member 3 cover at least a part of the area of the tab, thereby reducing the possibility of uneven heat on the battery cell 2.
In this embodiment, the material of the housing 1 may be a material with good heat conduction performance, such as aluminum, copper, etc., and the material of the housing 21 may be copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The positive electrode tab 231 is made of aluminum material, the negative electrode tab 232 is made of copper material, and the contact area between the heat sink 3 and the positive electrode tab 231 is larger than the contact area between the heat sink 3 and the negative electrode tab 232. Because the heat generated by the positive electrode tab 231 is greater than the heat generated by the negative electrode tab 232 when the battery cell 2 is in operation, aiming at the uneven heat generated by the two electrode tabs, the contact area of the heat dissipation piece 3 and the positive electrode tab 231 is greater than the contact area of the heat dissipation piece 3 and the negative electrode tab 232, namely, the heat exchange area between the positive electrode tab 231 and the heat dissipation piece 3 is increased, so that the heat at the positive electrode tab 231 can be rapidly dissipated, further different heat dissipation requirements of the positive electrode tab 231 and the negative electrode tab 232 are met, and a uniform heat dissipation effect is realized.
In some embodiments, the heat dissipation element 3 may be a heat dissipation plate made of a material with good heat conduction performance, for example, copper has a heat conduction coefficient of about 400W/(m·k), and the heat dissipation element 3 may be a heat dissipation plate made of copper, a thickness of the heat dissipation plate may be 10 mm-20 mm, a shape of the heat dissipation plate may be honeycomb, or a surface of the heat dissipation plate may be distributed with a plurality of protruding points to enhance a heat dissipation effect, so that heat generated by the battery cell is rapidly dissipated; the heat sink 3 may be a liquid cooling plate, or the heat sink 3 may be a semiconductor refrigerator.
When the battery cell 2 works, the heat generated by each part of the battery cell is unequal, for example, the heat generated by the first side 211 and the second side 212 of the battery cell 2 is smaller, and the heat generated by the middle parts of the first side 211 and the second side 212 is larger than the heat generated by two sides of the battery cell. The third side 213, the fourth side 214 and the bottom 215 of the cell 2 generate a larger amount of heat. In order to make the heat dissipation of the battery cell 2 uniform, the heat dissipation effect of each heat dissipation member 3 or each part of the heat dissipation member 3 is different, so that the heat dissipation effect corresponds to the amount of heat generated by each part of the battery cell 2. For example, if the heat sink 3 is a heat sink made of copper, the thickness of the heat sinks located at the third side 213, the fourth side 214, and the bottom 215 is greater than the thickness of the heat sinks located at the first side 211 and the second side 212, and the heat dissipation effect of the heat sinks located at the middle of the first side 211 and the second side 212 is greater than the heat dissipation effect of both sides thereof. If the heat dissipation element 3 is a liquid cooling plate, the liquid cooling pipelines inside the liquid cooling plates located on the third side 213, the fourth side 214 and the bottom 215 are more than the liquid cooling pipelines inside the liquid cooling plates located on the first side 211 and the second side 212, the heat dissipation effect is better, and the liquid cooling pipelines in the middle of the liquid cooling plates located on the first side 211 and the second side 212 are more than the liquid cooling pipelines on the two sides of the liquid cooling plates, so that the heat dissipation effect is better.
In order to further improve the heat dissipation and cooling effect of the battery cell 2, the battery cell module 100 may further include other heat dissipation mechanisms to further dissipate heat of the battery cell 2 through the other heat dissipation mechanisms. For example, the casing 1 may further be provided with an air inlet and an air outlet, so that the air flow is blown by the fan to flow through the interior of the casing 1 to take away heat, so as to further improve the heat dissipation and cooling effects of the battery cell 2.
According to the embodiment, the radiating piece 3 is integrated on the single battery cell 2, so that the effective heat dissipation and cooling of the battery cell 2 are realized, the heat dissipation effect of the whole battery cell module 100 is improved, the heat dissipation is more uniform, the situation that the battery cell module 100 has uneven heat is reduced, and the whole battery cell module 100 can work at a reasonable temperature.
Based on the above embodiment, the present application further discloses another specific implementation manner, and the difference between this embodiment and the above embodiment is that, referring to fig. 4, fig. 4 is a perspective exploded view of a battery cell module provided by another embodiment of the present application, in this embodiment, the heat dissipation element 3 is a liquid cooling plate, the battery cell module 100 further includes a liquid inlet pipe 4 and a liquid outlet pipe 5, the liquid inlet pipe 4 and the liquid outlet pipe 5 are respectively disposed through the housing 1, and both the liquid inlet pipe 4 and the liquid outlet pipe 5 are connected with the liquid cooling plate.
When the battery cell 2 works, cooling liquid with lower temperature can flow into the liquid cooling plate through the liquid inlet pipe 4, so that the cooling liquid in the liquid cooling plate can exchange heat with the battery cell 2, the temperature of the battery cell 2 is reduced, and the cooling liquid with increased temperature can flow away through the liquid outlet pipe 5, namely, the cooling liquid can take away the battery cell 2 to generate heat.
According to the embodiment, the liquid cooling plate is arranged, the liquid cooling plate is provided with a pipeline for cooling water or other cooling media to flow, heat emitted by the battery cell 2 can be taken away along with the flow of the cooling media, so that the effect of heat dissipation and cooling is achieved, and the liquid inlet pipe 4 and the liquid outlet pipe 5 are arranged, so that other external devices can be conveniently connected, and the circulation of the cooling water is achieved.
Based on the foregoing embodiments, the embodiment of the present application further discloses a battery pack, and referring to fig. 5 and 6, fig. 5 is a perspective view of the battery pack provided in the embodiment of the present application, and fig. 6 is a perspective exploded view of the battery pack in fig. 5, where the battery pack includes a bottom cover 201, an upper cover 202, a battery module 203, and an exhaust valve. The upper cover 202 and the lower cover 201 are coupled to each other to define a receiving space for receiving the battery module 203, and the battery module 203 is mounted in the receiving space formed by the upper cover 202 and the lower cover 201. An exhaust valve is provided at the upper cover 202 and/or the lower cover 201 such that gas generated from the battery module 203 can be exhausted through the exhaust valve.
The battery module 203 includes a plurality of battery cell modules 100 described in the foregoing embodiments, and each battery cell module 100 is electrically connected to form the battery module 203, where each battery cell module 100 may be connected in series or parallel or in parallel, and the series-parallel refers to that a plurality of battery cell modules 100 are connected in series or parallel. The plurality of battery cells 100 may be directly connected in series, in parallel or in series-parallel, and then the battery modules 203 are formed by integrating the plurality of battery cells 100. In some embodiments, the battery module 203 may further include a bus member for making electrical connection between the plurality of battery cells 100.
In order to improve the heat dissipation effect of the battery pack 200, the battery pack 200 further includes a liquid cooling assembly (not shown) installed in the receiving space formed by the upper cover 202 and the bottom cover 201 to be capable of performing heat exchange with the battery module 203 through the liquid cooling assembly, thereby cooling the entire battery pack 200.
In this embodiment, the heat dissipation element 3 is a liquid cooling plate, the cell module 100 further includes a liquid inlet pipe 4 and a liquid outlet pipe 5, the liquid inlet pipe 4 and the liquid outlet pipe 5 are respectively penetrating through the housing 1, and the liquid inlet pipe 4 and the liquid outlet pipe 5 are respectively connected with the liquid cooling plate and the liquid cooling assembly, so that the cooling liquid in the liquid cooling plate and the cooling liquid in the liquid cooling assembly can flow mutually.
In this embodiment, since each cell module 100 is integrated with a corresponding liquid cooling plate, and the battery pack 200 is further integrated with a liquid cooling assembly, the heat dissipation effect of the single cell 2 can be improved through the liquid cooling plate, the heat dissipation effect of the whole battery pack 200 can be effectively improved through the liquid cooling plate and the liquid cooling assembly, and the possibility of uneven temperature of the battery pack 200 is reduced.
Based on the above embodiments, the embodiments of the present application further disclose an energy storage tank, referring to fig. 7, fig. 7 is a perspective view of the energy storage tank provided by the embodiments of the present application, where the energy storage tank 300 includes a tank 301, an energy storage converter (not shown in the drawings), a battery management system (not shown in the drawings), and a plurality of battery packs 200 as described in the above embodiments. The box 301 has an installation space, and the energy storage converter, the battery management system and the battery packs 200 are respectively installed in the installation space of the box 301, and the energy storage converter is electrically connected with the battery packs, and the energy storage converter is used for realizing the conversion of alternating current and direct current in the charging and discharging processes of the battery packs 200, and the battery management system is connected with the battery packs 200 and is used for monitoring and controlling the states of the battery packs 200 in real time.
For example, when the battery pack 200 needs to be charged, the ac power provided by the external power source may be converted into the dc power by the energy storage converter and charged into the battery pack 200; when the battery pack 200 is required to provide alternating current power for external electric appliances, the direct current provided by the battery pack 200 can be converted into alternating current power through the energy storage converter and provided for the external electric appliances, and if the external electric appliances need direct current power, the battery pack 200 can also be used for directly providing power for the external electric appliances without converting the direct current power into alternating current power.
According to the embodiment, each battery pack 200 is integrated with the corresponding liquid cooling plate through the corresponding liquid cooling plate, so that the heat dissipation effect of the single battery 2 can be improved through the liquid cooling plates, the heat dissipation effect of the single battery pack 200 can be effectively improved through the liquid cooling plates and the liquid cooling assembly, and the heat dissipation effect of the whole energy storage box 300 is improved.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (11)

1. A battery cell module, comprising:
The battery cell comprises a shell, an end cover and a battery cell body, wherein the battery cell body is contained in the shell, and the end cover is covered on the shell;
The shell is provided with an accommodating cavity, the battery cell is accommodated in the accommodating cavity, the end cover is covered on the shell, and the end cover is respectively connected with the shell and the shell;
the heat dissipation piece is accommodated in the accommodating cavity and is positioned on at least two outer side surfaces of the shell.
2. The battery cell module of claim 1, wherein a plurality of heat dissipation elements are provided, and the plurality of heat dissipation elements are respectively positioned on the outer surface of the peripheral side part of the housing and the outer surface of the bottom.
3. The battery cell module of claim 1, further comprising a thermally conductive member disposed between the housing and the heat sink.
4. The cell module of claim 3, wherein the thermally conductive member is provided as a thermally conductive pad, a thermally conductive adhesive, or a thermally conductive tape.
5. The cell module of claim 1, wherein the heat sink is a liquid cooling plate, the cell module further comprises a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are respectively connected with the liquid cooling plate, and the liquid inlet pipe and the liquid outlet pipe are respectively arranged in the housing in a penetrating manner.
6. The cell module of any one of claims 1-5, wherein the cell body comprises a tab, and the heat sink covers at least a portion of the tab.
7. The cell module of claim 6, wherein the tab comprises a positive tab and a negative tab, the positive tab being made of an aluminum material and the negative tab being made of a copper material;
the contact area of the heat dissipation piece and the positive electrode lug is larger than that of the heat dissipation piece and the negative electrode lug.
8. The battery cell module of claim 7, wherein the end cap comprises a cover plate, a positive post and a negative post, the cover plate covers the housing and the shell, the cover plate is respectively connected with the housing and the shell, the positive post and the negative post are respectively arranged on the cover plate in a penetrating manner, the positive post is electrically connected with the positive tab, and the negative post is electrically connected with the negative tab.
9. A battery pack, characterized by comprising a bottom cover, an upper cover and a plurality of battery cell modules according to any one of claims 1-8, wherein the upper cover and the bottom cover are connected to form a containing space, a plurality of battery cell modules are respectively arranged in the containing space, and a plurality of battery cell modules are electrically connected.
10. The battery pack of claim 9, further comprising a liquid cooling assembly disposed in the receiving space, the heat sink being configured as a liquid cooling plate, the liquid cooling plate being coupled to the liquid cooling assembly.
11. An energy storage box, which is characterized by comprising a box body, an energy storage converter, a battery management system and a plurality of battery packs according to claim 9 or 10, wherein the energy storage converter, the battery management system and the battery packs are respectively arranged in the box body, the energy storage converter is electrically connected with the battery packs, and the battery management system is connected with the battery packs and is used for monitoring and controlling the states of the battery packs in real time.
CN202410535693.8A 2024-04-29 2024-04-29 Battery cell modules, battery packs and energy storage boxes Pending CN118336268A (en)

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Application Number Priority Date Filing Date Title
CN202410535693.8A CN118336268A (en) 2024-04-29 2024-04-29 Battery cell modules, battery packs and energy storage boxes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410535693.8A CN118336268A (en) 2024-04-29 2024-04-29 Battery cell modules, battery packs and energy storage boxes

Publications (1)

Publication Number Publication Date
CN118336268A true CN118336268A (en) 2024-07-12

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Application Number Title Priority Date Filing Date
CN202410535693.8A Pending CN118336268A (en) 2024-04-29 2024-04-29 Battery cell modules, battery packs and energy storage boxes

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119253132A (en) * 2024-09-30 2025-01-03 江苏同启新能源科技有限公司 A centralized high-efficiency liquid-cooled energy storage container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119253132A (en) * 2024-09-30 2025-01-03 江苏同启新能源科技有限公司 A centralized high-efficiency liquid-cooled energy storage container

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