Battery assembly, battery cooling system and battery pack

Abstract

The utility model discloses a battery assembly, a battery cooling system and a battery pack. The battery assembly comprises a plurality of battery cooling units which are arranged side by side. The battery cooling unit comprises a battery monomer and a heat conducting piece, the battery monomer is provided with a through hole, and one end of the heat conducting piece penetrates through the through hole. At least two battery cooling units exist in the plurality of battery cooling units and are adjacent to each other, and the heat conduction pieces of the two battery cooling units are flexibly connected. At least two battery cooling units exist in the plurality of battery cooling units and are adjacent to each other, the cooling pipes of the two battery cooling units are flexibly connected, and the length of the battery assembly can be shortened through flexible connection, so that deformation or cracking of the battery assembly is avoided, stable cooling of the battery assembly is facilitated, and the service life of the battery assembly is prolonged. And the battery assembly is at a proper temperature.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium battery production, and particularly relates to a battery assembly, a battery cooling system and a battery pack. Background Art

[0002] In the related art, a lithium battery assembly includes a plurality of lithium battery monomers and heat conducting rods. Each heat conducting rod passes through a lithium battery monomer, and the plurality of lithium battery monomers are arranged side by side, and adjacent two heat conducting rods are connected.

[0003] However, the lithium battery assembly has the disadvantages of deformation and cracking. Summary of the Utility Model

[0004] This application expects to provide a battery assembly, a battery cooling system and a battery pack, at least for avoiding the deformation or cracking of the battery assembly, enabling the battery assembly to be stably cooled, and keeping the battery assembly at an appropriate temperature.

[0005] The utility model provides a battery assembly, including: a plurality of battery cooling units arranged side by side. Each battery cooling unit includes: a battery monomer and a heat conducting member. The battery monomer is provided with a through hole, and one end of the heat conducting member passes through the through hole.

[0006] Among at least two of the plurality of battery cooling units, and the two are adjacent, the heat conducting members of the two are flexibly connected.

[0007] As an implementable manner, the heat conducting members between any adjacent two of the plurality of battery cooling units are flexibly connected.

[0008] As an implementable manner, the heat conducting members between adjacent two of a part of the plurality of battery cooling units are flexibly connected, and the heat conducting members between adjacent two of the remaining part are rigidly connected, and the rigid connection and the flexible connection are arranged alternately.

[0009] As an implementable manner, the heat conducting members between adjacent two of a part located in the middle of the plurality of battery cooling units are flexibly connected, and the heat conducting members between adjacent two of the remaining part located at both ends are rigidly connected.

[0010] As an implementable manner, it further includes a hose. The heat conducting members of the two are flexibly connected through the hose. The hose includes a metal hose, a rubber hose and a plastic hose.

[0011] As an implementable manner, the hose is hermetically connected to the heat conducting member.

[0012] As an implementable manner, the hose is a three-way pipe, and the three-way pipe is located in the middle of the plurality of battery cooling units.

[0013] The present utility model provides a battery cooling system, which includes a cooling circulation mechanism and a plurality of the above-mentioned battery modules. The plurality of battery modules are arranged in parallel. The cooling circulation mechanism includes a water inlet pipe and a water return pipe;

[0014] The water inlet pipe, the plurality of battery modules arranged in parallel, and the water return pipe are connected in series in sequence.

[0015] As an implementable mode, for any two adjacent ones among the plurality of battery modules arranged in parallel, the battery cells of one are located between two adjacent battery cells of the other, and there is heat transfer between the battery cells of the one and the area between the two adjacent battery cells of the other, and / or,

[0016] the battery cells of the other are located between two adjacent battery cells of the one, and there is heat transfer between the battery cells of the other and the area between the two adjacent battery cells of the one.

[0017] The present utility model provides a battery pack, which includes a control system and the above-mentioned battery cooling system. The control system is used to control the start-stop and circulation of the battery cooling system.

[0018] In the above solution, at least two of several battery cooling units exist and are adjacent to each other. The cooling pipes of the two are flexibly connected. The flexible connection can adjust the shortening of the length of the battery module, thus avoiding deformation or cracking of the battery module, helping the battery module to be cooled stably, and enabling the battery module to be at an appropriate temperature. A plurality of battery modules are arranged in parallel. The water inlet pipe, the plurality of battery modules arranged in parallel, and the water return pipe are connected in series in sequence. Among them, the pump body drives the coolant in the water return pipe and the water inlet pipe to circulate. Each battery cell of one of two adjacent first battery modules can transfer heat to the metal hose in the other, further improving the problem of temperature rise in the middle during battery charging or discharging. Or, in each battery module, the metal hose located in the middle of the battery module is a three-way pipe, so that two coolant circulation circuits can be formed, which helps to improve the cooling efficiency of the battery and further improve the problem of temperature rise in the middle during battery charging or discharging. Description of the Drawings

[0019] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present application will become more obvious:

[0020] Figure 1 It is a schematic structural diagram of a battery cooling unit provided by an embodiment of the present utility model;

[0021] Figure 2Schematic diagram of the first battery module provided by an embodiment of the present utility model;

[0022] Figure 3 Schematic diagram of the second battery module provided by an embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the third battery module provided by an embodiment of the present utility model;

[0024] Figure 5 Schematic diagram of the fourth battery module provided by an embodiment of the present utility model;

[0025] Figure 6 Schematic diagram of the first battery cooling system provided by an embodiment of the present utility model;

[0026] Figure 7 Schematic diagram of the second battery cooling system provided by an embodiment of the present utility model;

[0027] Figure 8 Schematic diagram of the third battery cooling system provided by an embodiment of the present utility model;

[0028] Battery module 100, first battery module 100a, second battery module 100b, third battery module 100c;

[0029] Battery cooling unit 10, first battery cooling unit 10a, first battery cell 111, first heat conduction tube 121, second battery cooling unit 10b, second battery cell 112, second heat conduction tube 122, third battery cooling unit 10c, third battery cell 113, third heat conduction tube 123, fourth battery cooling unit 10d, fourth battery cell 114, fourth heat conduction tube 124, fifth battery cooling unit 10e, sixth battery cooling unit 10f;

[0030] Battery cell 11, outer shell 1101, upper annular cover plate 1102, lower annular cover plate 1103, heat conduction tube 12;

[0031] Hose 20, first metal hose 21, second metal hose 22, third metal hose 23;

[0032] Cooling circulation mechanism 200, water inlet pipe 201, water return pipe 202, pump body 203;

[0033] Two-way flexible joint 301, three-way flexible joint 302. Detailed implementation manners

[0034] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. In addition, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0036] At least refer to Figures 1 - 8 As shown, an example of the present utility model provides a battery assembly 100, which includes: a plurality of battery cooling units 10 arranged side by side.

[0037] The battery cooling unit 10 includes: a battery cell 11 and a heat conducting member, and the battery cell 11 is provided with a through hole.

[0038] Wherein, as Figure 1 shown, the battery cell 11 includes an outer housing 1101, an inner housing (not shown due to occlusion), an upper annular cover plate 1102 and a lower annular cover plate 1103. Both the outer housing 1101 and the inner housing are cylindrical, and the through hole of the inner housing is the above-mentioned through hole. The diameter of the outer housing 1101 is larger than that of the inner housing, that is, the battery cell 11 as a whole forms an annular structure. The inner housing is coaxially arranged inside the outer housing 1101 and defines a winding core chamber with the outer housing 1101. The upper annular cover plate 1102 covers the upper opening of the winding core chamber, and the lower annular cover plate 1103 covers the lower opening of the winding core chamber. Among them, the winding core (not shown due to occlusion) is arranged in the winding core chamber.

[0039] Of course, it can be understood that the formation method of the through hole of the battery cell 11 can also include other methods, and this embodiment does not limit this.

[0040] One end of the heat conducting member passes through the through hole of the battery cell 11, so that the heat generated by the winding core of the battery cell 11 can be transferred to the external environment through the heat conducting member to reduce the temperature of the battery cell 11.

[0041] Wherein, the heat conducting member and the through hole can be connected by insertion, bonding, welding,......

[0042] Among the plurality of battery cooling units 10, at least two of them exist and are adjacent to each other, and the heat conducting members between the two are flexibly connected.

[0043] The heat conducting member can be a heat conducting tube 12 or a heat conducting column. The following embodiments will be described with the heat conducting member being the heat conducting tube 12:

[0044] The flexible connection can be understood as that one heat conduction tube 12 and another heat conduction tube 12 are connected through a hose 20. The hose 20 includes a plastic hose, a rubber hose and a metal hose. The metal hose can be a corrosion-resistant corrugated hose or a corrosion-resistant plastic-coated hose.

[0045] In a specific embodiment, as Figure 2 shown, a battery assembly 100 includes six battery cooling units 10: a first battery cooling unit 10a to a sixth battery cooling unit 10f. The first battery cooling unit 10a to the sixth battery cooling unit 10f are arranged side by side in the left-to-right direction. It can be understood that in other embodiments, a single battery assembly 100 may also include 4, 7, 8, etc. battery cooling units 10, which are determined according to the actual battery capacity and are not limited herein.

[0046] Among them, the heat conduction tubes 12 of the second battery cooling unit 10b and the heat conduction tubes 12 of the third battery cooling unit 10c are flexibly connected through a corrugated hose.

[0047] The heat conduction tubes 12 of the first battery cooling unit 10a and the heat conduction tubes 12 of the second battery cooling unit 10b are rigidly connected. The rigid connection can be a threaded connection, an insertion connection, a snap connection, or other connection methods between the heat conduction tubes 12 of the first battery cooling unit 10a and the heat conduction tubes 12 of the second battery cooling unit 10b.

[0048] The heat conduction tubes 12 of the third battery cooling unit 10c and the heat conduction tubes 12 of the fourth battery cooling unit 10d are rigidly connected; the heat conduction tubes 12 of the fourth battery cooling unit 10d and the heat conduction tubes 12 of the fifth battery cooling unit 10e are rigidly connected; the heat conduction tubes 12 of the fifth battery cooling unit 10e and the heat conduction tubes 12 of the sixth battery cooling unit 10f are rigidly connected. The heat of the coolant flowing in the heat conduction tube 12 and the heat generated by the core of each battery cooling unit 10 are transferred to the external environment, thereby improving the problem of temperature rise in the middle during battery charging or discharging.

[0049] When the first battery cooling unit 10a in the battery assembly 100 generates a displacement in the left-right direction, the first battery cooling unit 10a moves to the right, so that the first battery cooling unit 10a drives the second battery unit to move to the right. Since the heat conduction tubes 12 of the second battery cooling unit 10b and the heat conduction tubes 12 of the third battery cooling unit 10c are flexibly connected through a corrugated hose, the length of the corrugated hose is shortened, so that the distance between the second battery cooling unit 10b and the third battery cooling unit 10c is shortened. This avoids deformation or cracking of the battery assembly 100, helps the battery assembly 100 to cool stably, and enables the battery assembly 100 to be at an appropriate temperature.

[0050] Of course, it can be understood that other battery cooling units 10 in the battery assembly 100 can also be displaced in the left - right direction, and the corrugated hoses between the second battery cooling unit 10b and the third battery cooling unit 10c can prevent deformation or cracking of the battery assembly 100.

[0051] In practical applications, among the first battery cooling unit 10a to the sixth battery cooling unit 10f, the first battery cooling unit 10a and the sixth battery cooling unit 10f are located on the outermost sides of the battery assembly 100 and are prone to displacement in the left - right direction. To suppress deformation or cracking of the battery assembly 100 in a timely manner, the following structure of the battery assembly 100 is proposed in this embodiment:

[0052] Optionally, any two adjacent ones among several battery cooling units 10 are flexibly connected.

[0053] In a specific embodiment, as Figure 3 shown, the heat conduction tube 12 of the first battery cooling unit 10a is flexibly connected to the heat conduction tube 12 of the second battery cooling unit 10b; the heat conduction tube 12 of the second battery cooling unit 10b is flexibly connected to the heat conduction tube 12 of the third battery cooling unit 10c; the heat conduction tube 12 of the third battery cooling unit 10c is flexibly connected to the heat conduction tube 12 of the fourth battery cooling unit 10d; the heat conduction tube 12 of the fourth battery cooling unit 10d is flexibly connected to the heat conduction tube 12 of the fifth battery cooling unit 10e; the heat conduction tube 12 of the fifth battery cooling unit 10e is flexibly connected to the heat conduction tube 12 of the sixth battery cooling unit 10f.

[0054] When the first battery cooling unit 10a or the sixth battery cooling unit 10f has a large displacement in the left - right direction, the flexible connections at the middle positions can further compensate for the displacement to avoid deformation or cracking of the battery assembly 100.

[0055] Optionally, some of the adjacent ones among several battery cooling units 10 are flexibly connected, and the remaining adjacent ones are rigidly connected, and the rigid connections and the flexible connections are arranged alternately.

[0056] In a specific embodiment, as Figure 4As shown, there is a flexible connection between the heat conduction tubes 12 of the first battery cooling unit 10a and the heat conduction tubes 12 of the second battery cooling unit 10b; there is a rigid connection between the heat conduction tubes 12 of the second battery cooling unit 10b and the heat conduction tubes 12 of the third battery cooling unit 10c; there is a flexible connection between the heat conduction tubes 12 of the third battery cooling unit 10c and the heat conduction tubes 12 of the fourth battery cooling unit 10d; there is a rigid connection between the heat conduction tubes 12 of the fourth battery cooling unit 10d and the heat conduction tubes 12 of the fifth battery cooling unit 10e; there is a flexible connection between the heat conduction tubes 12 of the fifth battery cooling unit 10e and the heat conduction tubes 12 of the sixth battery cooling unit 10f.

[0057] Optionally, there is a flexible connection between adjacent ones of a part of the battery cooling units 10 located in the middle, and a rigid connection between adjacent ones of the remaining parts located at both ends.

[0058] In a specific embodiment, as Figure 5 shown, there is a flexible connection between the heat conduction tubes 12 of the first battery cooling unit 10a and the heat conduction tubes 12 of the second battery cooling unit 10b; there is a flexible connection between the heat conduction tubes 12 of the second battery cooling unit 10b and the heat conduction tubes 12 of the third battery cooling unit 10c; there is a rigid connection between the heat conduction tubes 12 of the third battery cooling unit 10c and the heat conduction tubes 12 of the fourth battery cooling unit 10d; there is a flexible connection between the heat conduction tubes 12 of the fourth battery cooling unit 10d and the heat conduction tubes 12 of the fifth battery cooling unit 10e; there is a flexible connection between the heat conduction tubes 12 of the fifth battery cooling unit 10e and the heat conduction tubes 12 of the sixth battery cooling unit 10f.

[0059] When the first battery cooling unit 10a or the sixth battery cooling unit 10f generates a large displacement in the left - right direction, the flexible connections between the second battery cooling unit 10b and the third battery cooling unit 10c, and between the fourth battery cooling unit 10d and the fifth battery cooling unit 10e can further compensate for the displacement to avoid deformation or cracking of the battery assembly 100.

[0060] As an implementable manner, any one of a metal hose, a rubber hose, and a plastic hose is hermetically connected to the heat conduction tube 12.

[0061] Any one of a metal hose, a rubber hose, and a plastic hose is connected to the heat conduction tube 12 through a hoop structure connection, an interference connection, or a threaded connection. In this way, it is avoided that the coolant in the heat conduction tube 12 leaks from the connection between the hose 20 and the heat conduction tube 12.

[0062] Furthermore, any one of a metal hose, a rubber hose, and a plastic hose is threadedly connected to the heat conduction tube 12, and a seal is provided between the two. For example, the seal can be a sealing tape or a sealing ring, etc.

[0063] The present utility model embodiment also provides a battery cooling system, which includes a cooling circulation mechanism 200 and a plurality of battery modules 100.

[0064] Specifically, as Figure 6 shown, a plurality of battery modules 100 are arranged in parallel. The cooling circulation mechanism 200 includes a water inlet pipe 201, a water return pipe 202 and a pump body 203. The water inlet pipe 201, the plurality of battery modules 100 arranged in parallel, and the water return pipe 202 are connected in series in sequence. Among them, the pump body 203 drives the coolant in the water return pipe 202 and the water inlet pipe 201 to circulate.

[0065] In a specific embodiment, as Figure 6 shown, the battery cooling system includes three battery modules 100: a first battery module 100a, a second battery module 100b and a third battery module 100c. The structure of each battery module 100 is the same. It can be understood that in other embodiments, the battery cooling system may also include 4, 5, 6, 7, 8, etc. battery modules 100, which are determined according to the actual battery capacity and are not limited herein.

[0066] The first battery module 100a includes a first battery cooling unit 10a to a fourth battery cooling unit 10d. The first battery cooling unit 10a includes a first battery cell 111 and a first heat conduction pipe 121; the second battery cooling unit 10b includes a second battery cell 112 and a second heat conduction pipe 122; the third battery cooling unit 10c includes a third battery cell 113 and a third heat conduction pipe 123; the fourth battery cooling unit 10d includes a fourth battery cell 114 and a fourth heat conduction pipe 124.

[0067] The first heat conduction pipe 121 and the second heat conduction pipe 22 are connected through a first metal hose 21; the second heat conduction pipe 22 and the third heat conduction pipe 123 are connected through a second metal hose 22; the third heat conduction pipe 123 and the fourth heat conduction pipe 124 are connected through a third metal hose 23.

[0068] For the first battery module 100a, as Figure 6 shown, the first battery cell 111 in the first battery module 100a is located between the first battery cooling unit 10a and the second battery cooling unit 10b in the second battery module 100b, and the first battery cooling unit 10a in the first battery module 100a is in direct or indirect contact with the first metal hose 21 in the second battery module 100b to achieve heat transfer between the two.

[0069] Similarly, in the first battery assembly 100a, the second battery cell 112 is located between the second battery cooling unit 10b and the third battery cooling unit 10c in the second battery assembly 100b, and the second battery cell 112 in the first battery assembly 100a is in direct or indirect contact with the second metal hose 22 in the second battery assembly 100b. The third battery cell 113 in the first battery assembly 100a is located between the third battery cooling unit 10c and the fourth battery cooling unit 10d in the second battery assembly 100b, and the third battery cell 113 in the first battery assembly 100a is in direct or indirect contact with the third metal hose 23 in the second battery assembly 100b.

[0070] In addition, the fourth battery cell 114 in the first battery assembly 100a is located between the fourth battery cooling unit 10d and the return water pipe 202 in the second battery assembly 100b, and the fourth battery cell 114 in the first battery assembly 100a is in direct or indirect contact with the fourth heat conduction pipe 124 in the second battery assembly 100b.

[0071] In the first battery assembly 100a, the heat generated by the coolant flowing through the first heat conduction pipe 121 to the third heat conduction pipe 123 and the core of each battery cooling unit 10 is transferred to the external environment, thereby improving the problem of the middle part temperature rise during battery charging or discharging. At the same time, the first battery cell 111 transfers heat to the first metal hose 21 of the second battery assembly 100b, the second battery cell 112 transfers heat to the second metal hose 22 of the second battery assembly 100b, the third battery cell 113 transfers heat to the third metal hose 23 of the second battery assembly 100b, and the fourth battery cell 114 transfers heat to the fourth heat conduction pipe 124 of the second battery assembly 100b, further improving the problem of the middle part temperature rise during battery charging or discharging.

[0072] For the second battery assembly 100b and the third battery assembly 100c, as Figure 6 shown, they are described with reference to the above-mentioned first battery assembly 100a, so details are not repeated here.

[0073] Further, the second metal hose 22 in the first battery assembly 100a may be a tee; the second metal hose 22 in the second battery assembly 100b may be a tee; the second metal hose 22 in the third battery assembly 100c may be a tee. Since in each battery assembly 100, the second metal hose 22 is located in the middle of the battery assembly 100, therefore, when connecting with a tee hose in the middle of the battery assembly 100, there can be two flow directions of the coolant. One is that the coolant flows out from both ends of the pump body 203 respectively, converges at the middle of the battery assembly 100 through the tee and then returns to the pump body 203; the other is that the coolant flows out from the middle of the battery assembly 100 through the tee and is branched, and then converges and returns to the pump body 203 respectively from both ends of the pump body 203. In this way, two identical coolant circulation loops can be formed, which helps to improve the cooling efficiency of the battery and further improve the problem of temperature rise in the middle during battery charging or discharging.

[0074] Of course, it can be understood that in some embodiments, the first metal hose 21 in each battery assembly 100 may be a tee; or, the third metal hose 23 in each battery assembly 100 may be a tee.

[0075] Meanwhile, in some embodiments, each battery cell in the first battery assembly 100a may not have heat transfer with the metal hose in the second battery assembly 200b, as Figure 7 shown. Of course, it can be understood that in some embodiments, as Figure 8 shown, the water inlet pipe 201 is connected to the first battery assembly 100a through a two-way flexible joint 301; the water inlet pipe 201 is connected to the second battery assembly 100b through a three-way flexible joint 302; the water inlet pipe 201 is connected to the third battery assembly 100c through a three-way flexible joint 302; the water return pipe 202 is connected to the first battery assembly 100a through a two-way flexible joint 301; the water return pipe 202 is connected to the second battery assembly 100b through a three-way flexible joint 302; the water return pipe 202 is connected to the third battery assembly 100c through a three-way flexible joint 302. Two-way flexible joints 301 are provided at the bends of the water inlet pipe 201 and the water return pipe 202. Among them, the two-way flexible joint 301 can be a two-way plastic hose or a two-way rubber hose; the three-way flexible joint 302 can be a three-way plastic hose or a three-way rubber hose. In this way, displacement can be compensated through the two-way flexible joint 301 and the three-way flexible joint 302 to avoid deformation or cracking of the entire battery cooling system.

[0076] The exemplary embodiment of the present utility model further provides a battery pack, including a control system and the above-mentioned battery cooling system, and the control system is used to control the start-stop and circulation of the battery cooling system. This battery pack has the advantages of the battery cooling system, so it will not be elaborated here.

[0077] The present utility model example further provides an electrical device, which can be an electric vehicle, an electric toy, a notebook, etc. The electrical device includes the above-mentioned battery pack. Since the electrical device has the advantages of the battery pack, it will not be elaborated herein.

[0078] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the above text is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0079] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solution formed by mutually replacing the above features with the (but not limited to) technical features having similar functions disclosed in the present application.

Claims

1. A battery assembly (100), characterized in that: include: A plurality of battery cooling units (10) are arranged side by side, the battery cooling units (10) comprising: a battery cell (11) and a heat conducting member, the battery cell (11) being provided with a through hole, one end of the heat conducting member passing through the through hole, There are at least two of the battery cooling units (10), and the two are adjacent to each other, and the heat conducting members of the two are flexibly connected.

2. The battery assembly (100) according to claim 1, characterized in that: The heat conducting members of any two adjacent ones of the plurality of battery cooling units (10) are flexibly connected.

3. The battery assembly (100) according to claim 1, characterized in that: The heat conducting members of two adjacent parts of a portion of the battery cooling units (10) are flexibly connected, and the heat conducting members of two adjacent parts of the remaining portion are rigidly connected, and the rigid connection and the flexible connection are alternately arranged.

4. The battery assembly (100) according to claim 1, characterized in that: The adjacent heat conducting members of a portion of the battery cooling units (10) located in the middle are flexibly connected, and the adjacent heat conducting members of the remaining portions located at both ends are rigidly connected.

5. The battery assembly (100) according to any one of claims 1 to 4, characterized in that: Also includes a hose (20), The heat conducting parts of the two are flexibly connected via the hose (20), and the hose (20) includes a metal hose, a rubber hose, or a plastic hose.

6. The battery assembly (100) according to claim 5, characterized in that: The hose (20) is sealedly connected to the heat conducting member.

7. The battery assembly (100) according to claim 5, characterized in that: The hose (20) is a three-way pipe, and the three-way pipe is located in the middle of a plurality of the battery cooling units (10).

8. A battery cooling system, characterized in that: The invention comprises a cooling circulation mechanism (200) and a plurality of battery assemblies (100) according to any one of claims 1 to 7, wherein the plurality of battery assemblies (100) are arranged in parallel, and the cooling circulation mechanism (200) comprises a water inlet pipe (201) and a water return pipe (202); The water inlet pipe (201), the plurality of battery assemblies (100) arranged in parallel, and the water return pipe (202) are sequentially connected in series.

9. The battery cooling system according to claim 8, characterized in that: Any two adjacent battery cells (11) of a plurality of battery assemblies (100) arranged in parallel, the battery cell (11) of one is located between two adjacent battery cells (11) of the other, and regional heat transfer occurs between the battery cell (11) of the one and the two adjacent battery cells (11) of the other, or / and, The battery cell (11) of the other one is located between two adjacent battery cells (11) of the one, and regional heat transfer is performed between the battery cell (11) of the other one and the two adjacent battery cells (11) of the one.

10. A battery pack, characterized in that: It comprises a control system and the battery cooling system according to claim 8 or 9, wherein the control system is used to control the start, stop and cycle of the battery cooling system.

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