Battery pack and vehicle

Abstract

The invention relates to the technical field of power batteries, in particular to a battery pack and a vehicle. The battery pack comprises a battery module, a shell, a cooling assembly and a first heat insulation layer, the battery module is arranged in the shell, the cooling assembly is arranged at the bottom of the battery module, and the micro-channel pipe group is adopted for heat dissipation, so that the heat dissipation area can be greatly increased, and the cooling performance of the battery module is further improved; the cooling assembly is located between the battery module and the supporting piece set, direct contact between the cooling assembly and the bottom of the shell is avoided, the contact area of the cooling assembly and the supporting piece set is small, the heat exchange area of the battery module and the external environment is reduced, meanwhile, the first heat insulation layer is arranged at the bottom of the micro-channel pipe set, and the bottom heat preservation performance is improved; and the thermal insulation performance of the battery pack is further improved. According to the vehicle provided by the invention, the battery pack is arranged, so that the continuous and stable operation of the vehicle is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery pack and a vehicle. Background Art

[0002] With the increasing maturity of new energy technology and basic supporting facilities, the sales of new energy vehicles have increased exponentially, and electric vehicles have become the first choice for families to purchase as a means of transportation. The battery pack is the core energy source of electric vehicles, providing driving power for the entire vehicle.

[0003] A suitable working temperature is crucial for a battery pack. When a battery pack is in an environment with too high or too low a temperature for a long time, it will affect the performance of the battery cell and even produce some irreversible electrochemical reactions, which will directly affect the battery life. Therefore, a thermal management method is required to control the temperature of the battery pack within the optimal working range. Aluminum profiles are generally used in the prior art. When designing the structure, it is necessary to consider the structural strength and heat dissipation requirements. Affected by the structural strength, the profile wall thickness and flow channel size are large, and the heat dissipation efficiency is not high. The battery cell is generally in direct contact with the lower box through a thermally conductive structural adhesive. The metal lower box is more likely to exchange heat with the surrounding environment, and the heat dissipation area of ​​the lower box is large, which greatly affects the thermal insulation performance of the battery pack. Therefore, there is an urgent need for a battery pack to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a battery pack to solve the problems of low heat dissipation efficiency and poor thermal insulation performance of the battery pack.

[0005] Another object of the present invention is to provide a vehicle, which ensures continuous and stable operation of the vehicle by providing the above-mentioned battery pack.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A battery pack, including a battery module, wherein the battery pack includes:

[0008] A housing, wherein the battery module is arranged inside the housing, and a support member group is arranged inside the housing, and the support member group is used to support the battery module;

[0009] A cooling assembly, the cooling assembly is located between the battery module and the support member group, the cooling assembly includes a microchannel tube group, the battery module is located on one side of the microchannel tube group, and the fluid in the microchannel tube group flows along a first horizontal direction;

[0010] A first heat insulation layer is disposed on the other side of the microchannel tube group.

[0011] Furthermore, the battery pack also includes a second thermal insulation layer, and the second thermal insulation layer is coated on the inner wall of the shell.

[0012] Furthermore, the microchannel tube group is provided in plurality, and the plurality of microchannel tube groups are arranged at intervals along a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction;

[0013] The cooling assembly further includes a temperature averaging plate, which is located between the battery module and the plurality of microchannel tube groups, and the plurality of microchannel tube groups are arranged on the temperature averaging plate.

[0014] Furthermore, each of the microchannel tube groups includes a plurality of microchannel tubes that are interconnected and in close contact, the plurality of microchannel tubes are arranged along the second horizontal direction, and the wall thickness of each microchannel tube is not greater than 0.3 mm.

[0015] Further, the microchannel tube group has a first end and a second end along the first horizontal direction, and the plurality of microchannel tube groups include a liquid inlet channel and a liquid outlet channel, the liquid inlet end of the liquid inlet channel and the liquid outflow end of the liquid outlet channel are both located at the first end, the liquid outflow end of the liquid inlet channel and the liquid inflow end of the liquid outlet channel are both located at the second end, and the liquid outflow end of the liquid inlet channel is connected to the liquid inlet end of the liquid outlet channel.

[0016] Furthermore, the cooling component also includes a first collecting pipe and a second collecting pipe, the first collecting pipe is arranged at the first end, the first collecting pipe is connected to the liquid inlet end of the liquid inlet channel, the first collecting pipe is connected to the liquid outflow end of the liquid outlet channel, and the second collecting pipe is arranged at the second end, and the second collecting pipe connects the liquid outflow end of the liquid inlet channel with the liquid inlet end of the liquid outlet channel.

[0017] Furthermore, the battery module and the temperature equalizing plate are bonded together by thermally conductive adhesive.

[0018] Furthermore, the support member group includes a plurality of support members, and the plurality of support members are arranged in the shell at intervals along the first horizontal direction, and the battery module is fixed on the support members.

[0019] Furthermore, the shell includes a first shell and a second shell, the second shell is detachably arranged at the bottom of the first shell, and two ends of the support member group are arranged on two opposite side walls of the second shell.

[0020] A vehicle comprises a chassis and a battery pack as described in any of the above solutions, wherein the battery pack is fixedly mounted on the chassis. Advantageous effects of the present invention include:

[0021] The present invention provides a battery pack, which includes a battery module, a shell, a cooling assembly and a first thermal insulation layer. The battery module is arranged inside the shell, and a support member group is arranged inside the shell, and the support member group is used to support the battery module; the cooling assembly is located between the battery module and the support member group, and the cooling assembly includes a microchannel tube group, and the battery module is located on one side of the microchannel tube group; the first thermal insulation layer is arranged on the other side of the microchannel tube group. The cooling assembly is arranged at the bottom of the battery module, and the microchannel tube group is used for heat dissipation, which can greatly increase the heat dissipation area, enhance the heat dissipation efficiency, and thus improve the cooling performance of the battery module. A support member group is arranged inside the shell, and the support member group can support the battery module. The cooling assembly is located between the battery module and the support member group, avoiding direct contact between the cooling assembly and the bottom of the shell, and the contact area between the cooling assembly and the support member group is small, which reduces the heat exchange area between the battery module and the external environment, and at the same time, the first thermal insulation layer is arranged at the bottom of the microchannel tube group, which greatly improves the bottom insulation performance, thereby improving the insulation performance of the battery pack.

[0022] An embodiment of the present invention further provides a vehicle, comprising a chassis and the above-mentioned battery pack, wherein the battery pack is fixedly mounted on the chassis. The battery pack is arranged to ensure continuous and stable operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of a battery pack provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the structure of a cooling assembly provided by an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional view of a cooling assembly provided by an embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the second shell and the support member group of the cooling assembly of the present invention.

[0027] In the figure:

[0028] 1. Shell; 11. First shell; 12. Second shell; 121. First side plate; 122. Second side plate; 123. Third side plate; 13. Support member;

[0029] 2. Cooling assembly; 21. Microchannel tube group; 211. Microchannel tube; 22. Temperature plate; 23. First manifold; 231. Liquid inlet; 232. Liquid outlet; 24. Second manifold;

[0030] 3. The first insulation layer;

[0031] 4. Second insulation layer;

[0032] 100. Battery module. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] Combine the following Figure 1-Figure 4 The technical solution of the present invention is further illustrated through specific implementation methods.

[0038] Embodiment 1

[0039] In order to improve the heat dissipation efficiency of the battery pack and enhance the thermal insulation performance of the battery pack, an embodiment of the present invention provides a battery pack, which includes a battery module 100, a shell 1, a cooling assembly 2 and a first thermal insulation layer 3. Among them, the battery module 100 is arranged inside the shell 1, and a support member group is arranged inside the shell 1, and the support member group is used to support the battery module 100; the cooling assembly 2 is located between the battery module 100 and the support member group, and the cooling assembly 2 includes a microchannel tube group 21, and the battery module 100 is located on one side of the microchannel tube group 21, and the fluid in the microchannel tube group 21 flows along the first horizontal direction; the first thermal insulation layer 3 is arranged on the other side of the microchannel tube group 21.

[0040] In detail, in this embodiment, the battery pack adopts bottom liquid cooling, a cooling assembly 2 is arranged at the bottom of the battery module 100, and a microchannel tube group 21 is used for heat dissipation, which can greatly increase the heat dissipation area, enhance the heat dissipation efficiency, and thus improve the cooling performance of the battery module 100. A support member group is arranged inside the shell 1, and the support member group can support the battery module 100. The cooling assembly 2 is located between the battery module 100 and the support member group, which avoids direct contact between the cooling assembly 2 and the bottom of the shell 1, and the contact area between the cooling assembly 2 and the support member group is small, which reduces the heat exchange area between the battery module 100 and the external environment. At the same time, a first thermal insulation layer 3 is arranged at the bottom of the microchannel tube group 21, which greatly improves the thermal insulation performance of the bottom, thereby improving the thermal insulation performance of the battery pack.

[0041] Furthermore, the battery pack also includes a second thermal insulation layer 4, which is coated on the inner wall of the shell 1. The second thermal insulation layer 4 is arranged on the inner wall of the shell 1 to insulate the side of the battery module 100, further improving the thermal insulation performance of the battery pack as a whole. In this embodiment, the second thermal insulation layer 4 is made of aerogel, which is arranged on the inner wall of the shell 1 to reduce the heat exchange between the side of the battery pack shell 1 and the external environment.

[0042] Furthermore, if Figure 2-Figure 3 As shown, a plurality of microchannel tube groups 21 are provided, and the plurality of microchannel tube groups 21 are arranged at intervals along the second horizontal direction, wherein the first horizontal direction is perpendicular to the second horizontal direction; the cooling assembly 2 also includes a temperature equalizing plate 22, and the temperature equalizing plate 22 is located between the battery module 100 and the plurality of microchannel tube groups 21, and the plurality of microchannel tube groups 21 are arranged on the temperature equalizing plate 22. Specifically, the plurality of microchannel tube groups 21 are arranged at intervals at the bottom of the temperature equalizing plate 22, and the battery module 100 is located at the top of the temperature equalizing plate 22. By providing the temperature equalizing plate 22, the plurality of microchannel tube groups 21 can be connected, and support can be provided for the plurality of microchannel tube groups 21, thereby improving the overall structural strength of the microchannel tube groups 21, and facilitating the design of the thin-walled microchannel tube groups 21 to enhance the cooling effect. It should be noted that, in the present embodiment, the first horizontal direction is consistent with the length extension direction of the shell 1, and the second horizontal direction is consistent with the width extension direction of the shell 1.

[0043] In this embodiment, the battery module 100 is bonded to the temperature equalizing plate 22 by means of thermally conductive adhesive. The thermally conductive adhesive has excellent thermal conductivity and good adhesion. The battery module 100 is bonded to the temperature equalizing plate 22 by means of the thermally conductive adhesive. Heat is transferred from the battery module 100 to the temperature equalizing plate 22 through the thermally conductive adhesive, thereby ensuring the effectiveness of heat transfer and further ensuring the cooling effect.

[0044] Furthermore, the microchannel tube group 21 includes a plurality of microchannel tubes 211 that are interconnected and in close contact, and the plurality of microchannel tubes 211 are arranged along the second horizontal direction, and the wall thickness of each microchannel tube 211 is not greater than 0.3 mm. In this embodiment, the microchannel tube 211 is made of aluminum, and the wall thickness of the aluminum microchannel tube 211 is not greater than 0.3 mm, preferably 0.3 mm. A specific flow channel scheme is designed by roll bending, and the structural design of the microchannel tube 211 can greatly increase the heat dissipation area.

[0045] Furthermore, the temperature averaging plate 22 is made of an aluminum plate with a thickness of 0.5 mm, and the aluminum plate is brazed and connected to the plurality of microchannel tubes 211, so that the temperature averaging plate 22 and the microchannel tubes 211 are less deformed, thereby ensuring the cooling effect.

[0046] In this embodiment, the microchannel tube group 21 has a first end and a second end along the first horizontal direction, and the plurality of microchannel tube groups 21 include a liquid inlet channel and a liquid outlet channel, the liquid inlet end of the liquid inlet channel and the liquid outlet end of the liquid outlet channel are both located at the first end, the liquid outlet end of the liquid inlet channel and the liquid inlet end of the liquid outlet channel are both located at the second end, and the liquid outlet end of the liquid inlet channel is connected to the liquid outlet end of the liquid outlet channel. Specifically, a part of the plurality of microchannel tube groups 21 is a liquid inlet channel, and another part is a liquid outlet channel, and the number of the liquid inlet channel and the liquid outlet channel is the same. In this embodiment, 10 microchannel tube groups 21 are arranged, of which 5 microchannel tube groups 21 located on one side are liquid inlet channels, and 5 microchannel tube groups 21 located on the other side are liquid outlet channels. The liquid inlet and the liquid outlet are arranged at the same end of the microchannel tube group 21, and the liquid outflow end of the liquid inlet channel is connected to the liquid inflow end of the liquid outlet channel, so that the liquid inlet channel and the liquid outlet channel are combined to form a U-shaped channel. The liquid inlet and the liquid outlet are arranged at the same end, which is beneficial to reducing the temperature difference between the liquid inlet and the liquid outlet, so that the temperature consistency inside the battery module 100 is good and the cooling efficiency is high.

[0047] Further, the cooling assembly 2 further includes a first header 23 and a second header 24, the first header 23 is arranged at the first end, the first header 23 is connected to the liquid inlet end of the liquid inlet channel, the first header 23 is connected to the liquid outflow end of the liquid outlet channel, and the second header 24 is arranged at the second end, and the second header 24 connects the liquid outflow end of the liquid inlet channel with the liquid inflow end of the liquid outlet channel. Specifically, a liquid inlet 231 and a liquid outlet 232 are arranged on the first header 23, and the liquid inlet 231 and the liquid outlet 232 are arranged at intervals along the second horizontal direction, and the positions of the liquid inlet 231 and the liquid outlet 232 can be interchanged, and this embodiment does not impose specific restrictions. The liquid inlet 231 is connected to the liquid inlet channel, and the liquid outlet 232 is connected to the liquid outlet channel. A baffle is arranged inside the first manifold 23 to separate the liquid inlet 231 from the liquid outlet 232. The second manifold 24 connects the liquid outflow end of the liquid inlet channel with the liquid inflow end of the liquid outlet channel. This arrangement facilitates the inflow and outflow of the coolant in the microchannel tube group 21.

[0048] In order to facilitate the processing of the shell 1, in this embodiment, the shell 1 includes a first shell 11 and a second shell 12. The second shell 12 is detachably arranged at the bottom of the first shell 11, and the support member group is arranged on the two opposite side walls of the second shell 12. In this embodiment, the first shell 11 is located at the upper part of the battery pack and is made of galvanized steel plate with a fire resistance temperature of 1200°C, which improves the fire resistance level of the battery pack; the second shell 12 is located at the lower part of the battery pack and is made of high-strength steel to ensure the structural strength of the battery pack. The second shell 12 is preferably made of 1180DP high-strength steel with a thickness of 1.2mm. The ultra-thin plate effectively reduces the weight of the shell 1, thereby reducing the material cost. At the same time, the high temperature resistance level of 1180DP high-strength steel can reach 1200°C, which improves the high temperature resistance level of the battery pack. The first shell 11 and the second shell 12 improve the fire and explosion resistance of the battery pack, ensure the structural strength of the battery pack, and greatly improve the safety performance of the battery pack.

[0049] In this embodiment, the first shell 11 and the second shell 12 are connected by bolts, the first shell 11 has a first accommodating cavity, the second shell 12 has a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are placed opposite to each other, and the battery module 100 is located in the space after the first accommodating cavity and the second accommodating cavity are placed opposite to each other.

[0050] Furthermore, if Figure 4As shown, the second shell 12 includes a bottom plate, a first side plate 121, a second side plate 122 and two third side plates 123. The first side plate 121 and the third side plate 123 are relatively arranged on both sides of the bottom plate along the first horizontal direction, and the two third side plates 123 are relatively arranged on the other two sides of the bottom plate along the second horizontal direction. The bottom plate and the first side plate 121, the second side plate 122 and the two third side plates 123 are surrounded by a second accommodating cavity. The first side plate 121, the second side plate 122 and the two third side plates 123 are all formed by a roll bending process. The first side plate 121, the second side plate 122 and the two third side plates 123 are connected by laser welding to form a frame of the second shell 12, which ensures the connection strength between the first side plate 121, the second side plate 122 and the two third side plates 123 and the overall sealing performance of the second shell 12.

[0051] Furthermore, the support member group includes a plurality of support members 13, which are arranged at intervals on the inner side wall of the housing 1 along the first horizontal direction, and the battery module 100 is fixed on the support members 13. A plurality of support members 13 are arranged to support the battery module 100, and the cooling assembly 2 is located between the battery module 100 and the support members 13, so as to avoid direct contact between the cooling assembly 2 and the bottom plate of the second housing 12, and reduce the heat exchange between the battery module 100 and the external environment through the second housing 12. Furthermore, the material of the support member 13 is 1180DP high-strength steel, which improves the fireproof and explosion-proof performance of the battery pack, thereby improving the safety performance of the battery pack.

[0052] Furthermore, the second heat insulation layer 4 is a heat-insulating foam. The heat-insulating foam is arranged below the microchannel tube 211 and between two adjacent support members 13. The heat-insulating foam can not only support the cooling assembly 2, but also reduce the direct contact between the cooling assembly 2 and the external environment, thereby improving the heat-insulating performance of the battery pack.

[0053] An embodiment of the present invention further provides a vehicle, comprising a chassis and the above-mentioned battery pack, wherein the battery pack is fixedly mounted on the chassis. The battery pack is arranged to ensure continuous and stable operation of the vehicle.

[0054] Embodiment 2

[0055] The structures of the housing 1, cooling assembly 2 and first heat insulation layer 3 in this embodiment are the same as those in the first embodiment, except that the battery pack is provided with two layers of battery modules 100. In order to improve the overall space utilization and energy density of the power battery, it is usually necessary to integrate the two layers of battery modules 100 into one battery pack.

[0056] In this embodiment, the battery module 100 is provided with two layers, including an upper battery module 100 and a lower battery module 100, and the two battery modules 100 are stacked in the vertical direction. Correspondingly, two groups of cooling components 2 are provided, one of which is provided at the bottom of the upper battery module 100, and the other is provided at the bottom of the lower battery module 100. The first shell 11 has a first accommodating cavity, the second shell 12 has a second accommodating cavity, the upper battery module 100 is located in the first accommodating cavity, the lower battery module 100 is located in the second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are placed opposite to each other. Two groups of support member groups are provided, and the two groups of support member groups are arranged on two opposite side walls of the second shell 12 at intervals in the vertical direction. The battery pack of this structure greatly improves the thermal insulation performance of the bottom battery module 100, so that the temperature difference consistency between the upper and lower battery modules 100 is good.

[0057] Furthermore, the support member group includes a first support member group and a second support member group, the two ends of the first support member group are respectively arranged on the upper end surfaces of the two third side plates 123, and are fixed to the two third side plates 123 by bolts, the upper battery module 100 is fixed to the first support member group, the two ends of the second support member group are arranged near the bottom of the two third side plates 123, and are fixedly connected to the bottom plate, and the lower battery module 100 is fixed to the second support member group. The first support member group and the second support member group can ensure that the battery module 100 is firmly and reliably fixed, thereby ensuring the stability of the battery pack performance.

[0058] In some other embodiments, the battery module 100 may also be provided with three layers, and the three-layer battery module 100 is stacked in the vertical direction, and correspondingly, the support member group and the cooling assembly 2 are provided corresponding to the number of layers of the battery module 100. The specific number of layers of the battery module 100 is not specifically limited here, and can be set according to the usage scenario.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery pack, comprising a battery module (100), characterized in that: The battery pack comprises: A housing (1), the battery module (100) being arranged inside the housing (1), a support member group being arranged inside the housing (1), the support member group being used to support the battery module (100); A cooling assembly (2), the cooling assembly (2) being located between the battery module (100) and the support member assembly, the cooling assembly (2) comprising a microchannel tube assembly (21), the battery module (100) being located on one side of the microchannel tube assembly (21), and a fluid in the microchannel tube assembly (21) flowing along a first horizontal direction; A first heat insulation layer (3), wherein the first heat insulation layer (3) is arranged on the other side of the microchannel tube group (21).

2. The battery pack according to claim 1, characterized in that: The battery pack further comprises a second heat insulating layer (4), wherein the second heat insulating layer (4) is coated on the inner side wall of the shell (1).

3. The battery pack according to claim 1, characterized in that: A plurality of the microchannel tube groups (21) are provided, and the plurality of the microchannel tube groups (21) are arranged at intervals along a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction; The cooling assembly (2) further comprises a temperature averaging plate (22), wherein the temperature averaging plate (22) is located between the battery module (100) and the plurality of microchannel tube groups (21), and the plurality of microchannel tube groups (21) are arranged on the temperature averaging plate (22).

4. The battery pack according to claim 3, characterized in that: Each of the microchannel tube groups (21) comprises a plurality of microchannel tubes (211) that are interconnected and in close contact, the plurality of microchannel tubes (211) are arranged along the second horizontal direction, and the wall thickness of each microchannel tube (211) is not greater than 0.3 mm.

5. The battery pack according to claim 3, characterized in that: The microchannel tube group (21) has a first end and a second end along the first horizontal direction, and the plurality of microchannel tube groups (21) include a liquid inlet channel and a liquid outlet channel, the liquid inlet end of the liquid inlet channel and the liquid outlet end of the liquid outlet channel are both located at the first end, the liquid outlet end of the liquid inlet channel and the liquid inlet end of the liquid outlet channel are both located at the second end, and the liquid outlet end of the liquid inlet channel is connected to the liquid inlet end of the liquid outlet channel.

6. The battery pack according to claim 5, characterized in that: The cooling assembly (2) further comprises a first collecting pipe (23) and a second collecting pipe (24), wherein the first collecting pipe (23) is arranged at the first end, the first collecting pipe (23) is connected to the liquid inlet end of the liquid inlet channel, the first collecting pipe (23) is connected to the liquid outlet end of the liquid outlet channel, and the second collecting pipe (24) is arranged at the second end, the second collecting pipe (24) connects the liquid outlet end of the liquid inlet channel with the liquid inlet end of the liquid outlet channel.

7. The battery pack according to claim 3, characterized in that: The battery module (100) and the temperature equalizing plate (22) are bonded together by means of heat-conducting adhesive.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The support member group comprises a plurality of support members (13), the plurality of support members (13) being arranged in the housing (1) at intervals along the first horizontal direction, and the battery module (100) being fixed on the support members (13).

9. The battery pack according to any one of claims 1 to 7, characterized in that: The shell (1) comprises a first shell (11) and a second shell (12); the second shell (12) is detachably arranged at the bottom of the first shell (11); and the two ends of the support member group are arranged on two opposite side walls of the second shell (12).

10. A vehicle, characterized in that It comprises a chassis and a battery pack as described in any one of claims 1 to 9, wherein the battery pack is fixed to the chassis.

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