Battery liquid cooling device, battery liquid cooling module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery liquid cooling device, a battery liquid cooling module and a battery pack, the battery liquid cooling device comprises a liquid cooling plate between battery cells and a first quick connecting pipe; the liquid cooling plates between the battery cells are clamped between the adjacent battery cells, and the liquid cooling plates between the battery cells are parallel to the maximum cross section of the battery stack; a plurality of first liquid cooling storage cavities for storing cooling liquid are formed in the inter-cell liquid cooling plate, and each first liquid cooling storage cavity penetrates through the length direction of the inter-cell liquid cooling plate; and the first end of the first quick connecting pipe is communicated with the first liquid cooling storage cavity. The inter-cell liquid cooling plates are vertically clamped between the adjacent cells, and the inter-cell liquid cooling plates are parallel to the maximum cross section of the cell stack, so that the contact area between the inter-cell liquid cooling plates and the cells can be maximized, and high speed and high efficiency of heat dissipation are realized; therefore, the technical requirements of continuously increasing energy storage of the lithium ion battery with high capacity and high charge-discharge rate are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a battery liquid cooling device, battery liquid cooling module and battery pack. BACKGROUND

[0002] Lithium ion battery as one of electrochemical energy storage mainstay, in recent years, the installed capacity of electrochemical energy storage is more and more big, and along with the installed capacity and battery capacity increase, lithium ion battery thermal management and thermal safety protection demand are watched closely.Typical thermal management technology mainly has air cooling, liquid cooling, heat pipe cooling and phase change cooling four kinds of schemes, wherein, liquid cooling thermal management technical scheme is on the comprehensive performance such as heat dissipation performance, cost, has greater potential in lithium ion battery thermal management application.

[0003] However, the existing lithium ion battery liquid cooling structure mainly concentrates in the thickness section of the battery cell, and there is a problem of small heat dissipation area and limited heat dissipation speed. Moreover, most of the lithium ion battery energy storage thermal management schemes translate the liquid cooling thermal management scheme and device of lithium ion power battery, that is, an independent external cooling liquid storage tank is used, under the action of lithium ion battery energy storage itself power supply and micro pump, lithium ion battery and external cooling liquid are forced to exchange heat, but this scheme has the limitations of relatively complex lithium ion battery energy storage structure and relatively low energy storage energy effective power utilization rate.

[0004] Finally, with the large-scale of lithium ion battery energy storage, the large capacity of lithium ion battery energy storage cell and the rapid charging and discharging rate, the requirement of lithium ion battery energy storage thermal management technology is higher and higher, that is, it needs to meet the requirements of low space ratio of non-direct energy storage components, high effective power utilization rate and intelligent thermal management technology. INVENTION CONTENTS

[0005] (I) technical problem to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a battery liquid cooling device, battery liquid cooling module and battery pack to meet the thermal management and thermal safety protection requirements of lithium ion battery energy storage module and its battery pack.

[0007] (II) technical scheme

[0008] In order to achieve the above-mentioned purpose, the battery liquid cooling module of the utility model comprises:

[0009] The inter-battery cell liquid cooling plate can be clamped between adjacent battery cells;The inter-battery cell liquid cooling plate is provided with a plurality of first liquid cooling storage cavities for storing cooling liquid, and each first liquid cooling storage cavity penetrates the length direction of the inter-battery cell liquid cooling plate;And,

[0010] A first quick connecting pipe, a first end of the first quick connecting pipe is communicated with the first liquid cooling storage cavity.

[0011] Optionally, the inter-battery cell liquid cooling plate is vertically arranged.

[0012] Optionally, the inter-battery cell liquid cooling plate is vertically arranged.

[0013] Optionally, the first liquid cooling storage cavities are straight-through type liquid storage cavities and are arranged in parallel and in a height direction.

[0014] Optionally, the first liquid cooling storage cavities are return type liquid storage cavities, and liquid outlets and return liquid inlets of all the return type liquid storage cavities are concentrated on the same side of the inter-battery cell liquid cooling plate.

[0015] Optionally, the first liquid cooling storage cavities in the inter-battery cell liquid cooling plate are arranged in two rows.

[0016] The inter-battery cell liquid cooling plate is pasted with heat-conducting buffer pads on both front and back surfaces, or cavities are formed between the two rows of first liquid cooling storage cavities, and heat-conducting buffer pads are arranged in the cavities.

[0017] In addition, the utility model also provides a battery liquid cooling module which comprises a battery stack and the above-mentioned battery liquid cooling device, the battery stack comprises a plurality of battery cells arranged in sequence, and the inter-battery cell liquid cooling plate is parallel to the maximum cross section of the battery stack.

[0018] Optionally, the battery liquid cooling module comprises a plurality of battery stacks.

[0019] A second end of the first quick connecting pipe is communicated with the first liquid cooling storage cavity in the adjacent battery stack, or the battery liquid cooling device further comprises an inter-battery stack liquid cooling plate which is vertically arranged, is located between the adjacent battery stacks or is located on one side of the battery stack, is provided with a second liquid cooling storage cavity, and the second end of the first quick connecting pipe is communicated with the second liquid cooling storage cavity.

[0020] Optionally, the front and back surfaces of the inter-battery stack liquid cooling plate are preformed with liquid storage cavity liquid inlets and outlets which are staggered in position, the end of the inter-battery stack liquid cooling plate is further preformed with an inter-battery stack screw fastening mounting hole, and the height of the inter-battery stack liquid cooling plate is greater than the height of the battery stack.

[0021] Optionally, a battery cell end liquid cooling plate is arranged on the outermost battery cell of the battery stack, the battery cell end liquid cooling plate is provided with a third liquid cooling storage cavity, the battery liquid cooling device further comprises a second quick connecting pipe, and the second quick connecting pipe is communicated with the third liquid cooling storage cavity in the adjacent battery stack.

[0022] The electric core end liquid cooling plate is provided with an end screw fastening mounting hole in advance.

[0023] Optionally, the first quick connection pipe and the second quick connection pipe each comprise a flexible connection pipe and a pair of quick connection heads corresponding to the end of the flexible connection pipe.

[0024] Further, the utility model provides a battery pack, it includes shell and the above-mentioned battery liquid cooling module of setting in the shell.

[0025] (Three) beneficial effects

[0026] In the utility model, the liquid cooling plate between the electric cores is clamped between the adjacent electric cores, and the liquid cooling plate between the electric cores is parallel to the maximum cross section of the battery stack, so that the contact area of the liquid cooling plate between the electric cores and the electric cores is maximized to achieve high speed and high efficiency of heat dissipation, thereby meeting the technical requirements of the growing high capacity, high rate of lithium ion battery energy storage.

[0027] Specifically, compared with the prior art, the utility model also has the following beneficial effects:

[0028] 1. Control cost:

[0029] All liquid cooling plate bodies adopt integrated casting process, which can reduce the cost compared with stamping and brazing; the liquid cooling plate and the heat-conducting buffer pad are combined, the composite liquid cooling plate directly participates in the production of the battery stack, and the process flow is shortened; the liquid cooling is in parallel mode in the electric core, and the liquid cooling is in series mode between the battery stacks, and the cooling flow in the liquid cooling plate is realized by utilizing the temperature difference between the electric cores and the battery stacks, thereby avoiding or reducing the need for external cooling liquid pumping devices and connecting pipelines;

[0030] 2. Improve the safety of the electric core: the liquid cooling plate is arranged on the maximum cross section of the battery stack, which maximizes the heat dissipation efficiency and speed of the battery stack and the battery pack; the series liquid cooling mode between the battery stacks greatly reduces the temperature difference in the battery pack and improves the temperature consistency; the liquid cooling plate is arranged between the battery stacks, and the liquid cooling plate contains cooling liquid, thereby forming strong physical and chemical isolation between the battery stacks; under the effect of multiple combinations, the thermal protection safety of the lithium ion battery energy storage is improved.

[0031] 3. Improve the service life and safety performance of the battery: the temperature difference between the electric cores and the battery stacks is reduced, the battery temperature consistency is improved, the battery is ensured to be in the best working temperature range, and finally the service life and safety performance of the electric core and the battery stack are improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structure schematic view of the battery liquid cooling module in the first embodiment of the utility model.

[0033] Figure 2 is another perspective view of the structure of the battery liquid cooling module in the second embodiment of the utility model; Figure 1

[0034] Figure 3 is an enlarged schematic view of the liquid cooling plate between the battery cells in the utility model;

[0035] Figure 4 is an enlarged schematic view of the quick connecting pipe in the utility model;

[0036] Figure 5 is a structural schematic view of the battery liquid cooling module in the second embodiment of the utility model;

[0037] Figure 6 is a structural schematic view of the battery liquid cooling module in the third embodiment of the utility model;

[0038] Figure 7 is another perspective view of the structure of the battery liquid cooling module in the second embodiment of the utility model; Figure 6

[0039] Figure 8 is a structural schematic view of the battery liquid cooling module in the fourth embodiment of the utility model;

[0040] Figure 9 is an enlarged schematic view of the liquid cooling plate between the battery cells in the utility model;

[0041] Figure 10 is another perspective view of the structure of the battery liquid cooling module in the second embodiment of the utility model; Figure 9

[0042] Figure 11 is an enlarged schematic view of the liquid cooling plate between the battery cells in another embodiment of the utility model;

[0043] Figure 12 is an enlarged schematic view of the liquid cooling plate between the battery cells in the utility model adopting the back type liquid storage cavity;

[0044] Figure 13 is a structural schematic view of the battery liquid cooling module in the fifth embodiment of the utility model;

[0045] Figure 14 is another perspective view of the structure of the battery liquid cooling module in the second embodiment of the utility model; Figure 13

[0046]

Explanation of reference numerals

[0047] 1: liquid cooling plate between battery cells; 101: first liquid cooling storage cavity; 102: heat-conducting buffer pad;

[0048] ​​​​2: quick connecting pipe; 21: first quick connecting pipe; 22: second quick connecting pipe; 201: quick connecting head; 202: flexible connecting pipe;

[0049] 3: battery cell;

[0050] 4: battery cell end liquid cooling plate; 401: third liquid cooling storage cavity; 402: end screw fastening mounting hole;

[0051] 5: binding belt;

[0052] 6: inter-battery stack liquid cooling plate; 601: liquid storage cavity inlet and outlet; 602: inter-stack screw fastening mounting hole. DETAILED DESCRIPTION

[0053] In order to better explain the utility model, so as to facilitate understanding, below combining with the drawings, through specific embodiment, the utility model is described in detail.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), if the specific posture changes, the directional indications also change accordingly.

[0055] In addition, in the utility model, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0056] In the utility model, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; "connection" can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0057] Reference is made to Figures 1 to 5The utility model provides a kind of battery liquid cooling device, it specifically can include inter-battery cell liquid cooling plate 1 and first quick connecting pipe 21.In addition, the utility model further provides a kind of battery liquid cooling module, it specifically can include battery stack and above-mentioned battery liquid cooling device.Wherein, battery stack includes multiple sequentially arranged battery cell 3.Inter-battery cell liquid cooling plate 1 is clamped between adjacent battery cell 3, and inter-battery cell liquid cooling plate 1 is parallel to the maximum cross section of battery stack (for example, Figure 1 And Figure 2 Inter-battery cell liquid cooling plate 1 adopts vertical setting mode in middle), so that the contact area between inter-battery cell liquid cooling plate 1 and battery cell 3 maximization is realized high speed and high efficiency of heat dissipation, to meet the technical requirements of growing high capacity, high rate of lithium ion battery energy storage of charge and discharge.

[0058] Inter-battery cell liquid cooling plate 1 is equipped with multiple first liquid cooling storage cavities 101 for storing cooling liquid, each first liquid cooling storage cavity 101 is through the length direction of inter-battery cell liquid cooling plate 1, wherein, the shape of first liquid cooling storage cavity 101 cross section can be preferably circular or square.The first end of first quick connecting pipe 21 is communicated with first liquid cooling storage cavity 101, and the second end of first quick connecting pipe 21 can be communicated with the first liquid cooling storage cavity 101 of adjacent battery stack or other liquid cooling device, so that inter-battery cell liquid cooling plate 1 is connected in series between two battery stacks, and multiple inter-battery cell liquid cooling plates 1 in the same battery stack are parallel to each other.In actual operation, when it is needed to inject cooling liquid into first liquid cooling storage cavity 101, cooling liquid can be injected into the side of first liquid cooling storage cavity 101 without connecting first quick connecting pipe 21, and the injection port is plugged after injection is completed.

[0059] As Figure 3 Indicated, inter-battery cell liquid cooling plate 1 can preferably be pasted with heat-conducting buffer pad 102 on both front and back, to fill the flatness gap of inter-battery cell liquid cooling plate 1 and battery cell 3 combination surface, ensure the heat dissipation efficiency and rate of inter-battery cell liquid cooling plate 1.In addition, multiple battery cell 3 can preferably be fixed by binding band 5, so that heat-conducting buffer pad 102 is compressed, ensure that inter-battery cell liquid cooling plate 1 and battery cell 3 are closely attached.

[0060] In the preferred embodiment, the plurality of first liquid cooling storage cavities 101 are straight-through type cavities parallel to each other and arranged at intervals along the height direction of the battery cell 3, corresponding to the entire height direction of the battery cell 3, so as to achieve better heat dissipation effect. The injection amount of the cooling liquid in a single first liquid cooling storage cavity 101 and the remaining liquid cooling storage cavities is 75% to 95% of the corresponding internal cavity volume, and the cooling liquid is added with low-boiling organic additives, such as acetaldehyde, acetic acid, or a mixture of the two. Each liquid cooling storage cavity is subjected to negative pressure treatment before the cooling liquid is added, and a certain negative pressure is still maintained in the liquid cooling storage cavity after the cooling liquid is injected, so as to further reduce the boiling point of the cooling liquid additive, and the low-boiling organic additive in the cooling liquid can be more easily vaporized. The low-boiling organic additive is vaporized by the heat generated by the charging and discharging of the battery cell 3, and the resulting heat can drive the cooling liquid in the liquid cooling storage cavity to form an internal circulation between the battery stacks, and under the action of heat conduction and heat convection, the heat balance between the battery stacks and between the battery stacks is achieved, and the temperature difference is reduced.

[0061] Referring to Figures 6 to 8 , the battery liquid cooling module can include a plurality of battery stacks. For example, in Figure 6 and Figure 7 , the second end of the first quick connection pipe 21 communicates with the first liquid cooling storage cavity 101 in the adjacent battery stack. Alternatively, in Figure 1 and Figure 8 , the battery liquid cooling device further includes a vertically arranged inter-battery stack liquid cooling plate 6 located between adjacent battery stacks or on one side of the battery stack (at this time, the inter-battery stack liquid cooling plate 6 can also be considered as part of the battery pack shell), and the second liquid cooling storage cavity is provided in the inter-battery stack liquid cooling plate 6. The second end of the first quick connection pipe 21 communicates with the second liquid cooling storage cavity, so as to form a series connection of the inter-battery stack liquid cooling plate 6 and the first liquid cooling storage cavity 101. In a battery pack composed of two or more battery stacks, in order to further improve the thermal safety between the battery stacks, it is preferred to add an inter-battery stack liquid cooling plate 6 between the battery stacks to achieve thermal isolation between the two battery stacks.

[0062] In the preferred embodiment, the plurality of first liquid cooling storage cavities 101 are straight-through type cavities parallel to each other and arranged at intervals along the height direction of the battery cell 3, corresponding to the entire height direction of the battery cell 3, so as to achieve better heat dissipation effect. The injection amount of the cooling liquid in a single first liquid cooling storage cavity 101 and the remaining liquid cooling storage cavities is 75% to 95% of the corresponding internal cavity volume, and the cooling liquid is added with low-boiling organic additives, such as acetaldehyde, acetic acid, or a mixture of the two. Each liquid cooling storage cavity is subjected to negative pressure treatment before the cooling liquid is added, and a certain negative pressure is still maintained in the liquid cooling storage cavity after the cooling liquid is injected, so as to further reduce the boiling point of the cooling liquid additive, and the low-boiling organic additive in the cooling liquid can be more easily vaporized. The low-boiling organic additive is vaporized by the heat generated by the charging and discharging of the battery cell 3, and the resulting heat can drive the cooling liquid in the liquid cooling storage cavity to form an internal circulation between the battery stacks, and under the action of heat conduction and heat convection, the heat balance between the battery stacks and between the battery stacks is achieved, and the temperature difference is reduced.

[0063] In addition, in a more preferred embodiment, the cell end liquid cooling plate 4 is arranged on the outermost cell 3 of the battery stack, and the third liquid cooling storage cavity 401 is arranged in the cell end liquid cooling plate 4 to meet the heat dissipation requirements of the two outermost cells of the battery stack. The battery liquid cooling device further comprises a second quick connection pipe 22, which communicates the third liquid cooling storage cavities 401 in adjacent battery stacks to form a series connection of the cell end liquid cooling plate 4 between two battery stacks. The inter-cell liquid cooling plate 1 and the cell end liquid cooling plate 4 are manufactured by casting process. The cell end liquid cooling plate 4 is provided with an end screw fastening mounting hole 402, and the cell end liquid cooling plate 4 can also be used as a battery stack mounting and fixing end plate to facilitate the assembly of the battery stack.

[0064] Again referring to Figure 1 and Figure 4 , the quick connection pipe 2 comprises a first quick connection pipe 21 and a second quick connection pipe 22, which can preferably comprise a flexible connection pipe 202 and a pair of quick connection heads 201 connected to the end of the flexible connection pipe 202. During charging and discharging of the cell, even if the inter-cell liquid cooling plate 1 in the battery stack is displaced, the inter-battery stack liquid cooling plate 6 can be firmly connected to the inter-cell liquid cooling plate 1 by the first quick connection pipe 21 without falling off. Among them, the flexible connection pipe 202 is composed of two layers of materials, the outer layer is a metal pipe, and the inner layer is a flexible high polymer material pipe, for example, a rubber pipe; optimally, the quick connection head 201 connected to the liquid cooling plate is partially connected to the liquid cooling storage cavity interface, and the connection length of the quick plug-in is constrained by the flexible connection pipe 202, so as to form a process limit of the connection length.

[0065] In addition, in other embodiments, referring to Figures 12 to 14 , the plurality of first liquid cooling storage cavities 101 are all back type liquid storage cavities (for example, U type) to meet the structural feature requirements of square cell or similar blade cell. The liquid outlet and the liquid return of all back type liquid storage cavities are concentrated on the same side of the inter-cell liquid cooling plate 1. The inter-cell liquid cooling plate 1 of the blade cell stack adopts the back type liquid storage cavity, and the liquid outlet and the liquid return of the back type liquid storage cavity are arranged on the non-pole side to avoid the connection of the cell pole and the Busbar in series and parallel.

[0066] Referring to Figures 9 to 11In another embodiment, the plurality of first liquid cooling storage cavities 101 arranged in two rows in the inter-cell liquid cooling plate 1 to form a double-layer structure to adapt to different cell monomer capacity and charge-discharge rate conditions. The inter-cell liquid cooling plate 1 of the double-layer structure is pasted with a heat-conducting buffer pad 102 on both front and back surfaces, or a cavity is formed between the two rows of first liquid cooling storage cavities 101 to perform internal thermal isolation of the liquid cooling plate and the battery stack, and the heat-conducting buffer pad 102 is arranged in the cavity to increase the adhesion between the inter-cell liquid cooling plate 1 and the cell 3 and the thermal safety isolation between the cells.

[0067] Further, the utility model also provides a battery pack which comprises a shell and the above-mentioned battery liquid cooling module arranged in the shell. The inter-cell liquid cooling plate 1 is clamped between adjacent cells 3, and the inter-cell liquid cooling plate 1 is parallel to the maximum cross section of the battery stack, so that the contact area between the inter-cell liquid cooling plate 1 and the cell 3 is maximized to realize high speed and high efficiency of heat dissipation, thereby meeting the technical requirements of the growing high-capacity, high-rate charge-discharge lithium ion battery energy storage.

[0068] It should be understood that the above description of the specific embodiments of the utility model is only for the purpose of illustrating the technical route and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, but the utility model is not limited to the above specific implementation. Any changes or modifications made within the scope of the claims of the utility model should be covered within the protection scope of the utility model.

Claims

1. A battery liquid cooling device characterized by comprising: The battery liquid cooling device comprises: An inter-battery cell liquid cooling plate (1) capable of being clamped between adjacent battery cells (3); a plurality of first liquid cooling storage cavities (101) for storing cooling liquid are arranged in the inter-battery cell liquid cooling plate (1), each of the first liquid cooling storage cavities (101) penetrating the length direction of the inter-battery cell liquid cooling plate (1); and A first quick connection pipe (21) having a first end communicating with the first liquid cooling storage cavities (101).

2. The battery liquid cooling apparatus according to claim 1, characterized by, The inter-battery cell liquid cooling plate (1) is vertically arranged; And / or, the inter-battery cell liquid cooling plate (1) is pasted with heat-conducting buffer pads (102) on both front and back surfaces.

3. The battery liquid cooling apparatus according to claim 2, characterized by The plurality of first liquid cooling storage cavities (101) are straight-through type liquid storage cavities parallel to each other and arranged in a height direction. Alternatively, the plurality of first liquid cooling storage cavities (101) are return type liquid storage cavities, and the liquid outlet and the liquid return of all the return type liquid storage cavities are concentrated on the same side of the inter-battery cell liquid cooling plate (1).

4. The battery liquid cooling apparatus according to claim 1, characterized by The plurality of first liquid cooling storage cavities (101) arranged in the inter-battery cell liquid cooling plate (1) are arranged in two rows. The inter-battery cell liquid cooling plate (1) is pasted with heat-conducting buffer pads (102) on both front and back surfaces, or cavities are formed between the two rows of first liquid cooling storage cavities (101), and heat-conducting buffer pads (102) are arranged in the cavities.

5. A battery liquid-cooled module, characterized by, The battery liquid cooling module comprises a battery stack and the battery liquid cooling device according to any one of claims 1-4, the battery stack comprising a plurality of battery cells (3) arranged in sequence; and the inter-battery cell liquid cooling plate (1) is parallel to the maximum cross section of the battery stack.

6. The battery liquid-cooled module of claim 5, wherein, The battery liquid cooling module comprises a plurality of battery stacks. The second end of the first quick connection pipe (21) communicates with the first liquid cooling storage cavities (101) in adjacent battery stacks; or the battery liquid cooling device further comprises an inter-battery stack liquid cooling plate (6) vertically arranged, the inter-battery stack liquid cooling plate (6) being located between adjacent battery stacks or on one side of the battery stack, the inter-battery stack liquid cooling plate (6) being provided with a second liquid cooling storage cavity, and the second end of the first quick connection pipe (21) communicating with the second liquid cooling storage cavity.

7. The battery liquid-cooled module of claim 6, wherein, The front and back surfaces of the inter-battery stack liquid cooling plate (6) are preformed with liquid storage cavity inlet and outlet ports (601) staggered in position; the end of the inter-battery stack liquid cooling plate (6) is further preformed with an inter-battery stack screw fastening mounting hole (602); and the height of the inter-battery stack liquid cooling plate (6) is greater than the height of the battery stack.

8. The battery liquid-cooled module of claim 6, wherein, A battery cell end liquid cooling plate (4) is arranged on the outermost battery cell (3) of the battery stack, the battery cell end liquid cooling plate (4) being provided with a third liquid cooling storage cavity (401); and the battery liquid cooling device further comprises a second quick connection pipe (22) communicating with the third liquid cooling storage cavities (401) in adjacent battery stacks. The battery cell end liquid cooling plate (4) is preformed with an end screw fastening mounting hole (402).

9. The battery liquid-cooled module of claim 8, wherein, The first quick connection pipe (21) and the second quick connection pipe (22) each comprise a flexible connection pipe (202) and a pair of quick connection heads (201) connected to the end of the flexible connection pipe (202) one by one.

10. A battery pack, characterized by, The battery pack comprises a shell and a battery liquid cooling module according to any one of claims 5-9 arranged in the shell.

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