Battery module cooling structure and battery pack

Abstract

The utility model provides a battery module cooling structure and a battery pack, the battery module cooling structure comprises two liquid cooling plates which are respectively attached to the top surface and the bottom surface of a battery module, and each liquid cooling plate is provided with a liquid inlet and a liquid outlet; the plurality of joints are configured to be connected to the liquid inlets and / or the liquid outlets; each connector is provided with a built-in end communicated with each liquid inlet and / or each liquid outlet, and an external connecting end penetrating through and extending to the outside of the battery pack shell, and each external connecting end is connected to a cooling liquid circulating pipeline in a communicated manner. According to the battery module cooling structure disclosed by the utility model, the connector penetrates through the battery pack shell, and the external connecting end of the connector is arranged outside the battery pack shell, so that the cooling liquid circulating pipeline is connected with the connector outside the battery pack, and the risk of liquid leakage in the battery pack is reduced, thereby improving the safety performance of the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery module cooling structure. The utility model also relates to a battery pack provided with the battery module cooling structure. Background Art

[0002] With the development of electric vehicles, the thermal safety of electric vehicle power batteries has become one of the important performance indicators of electric vehicles. In power batteries, the battery pack shell is equipped with multiple cells arranged in a certain arrangement. When the power battery is working, since each cell is arranged in a relatively small shell, heat will accumulate and cause the temperature in the battery pack to exceed its normal operating temperature. If the heat cannot be dissipated in time, it will cause the battery performance to decay faster, reduce the service life and even cause the battery to catch fire. Therefore, it is particularly important to dissipate the heat of the cells in the battery pack.

[0003] At present, the battery module is usually cooled by a liquid cooling plate abutting against the battery module, and the upper and lower ends of the battery module are provided with liquid cooling plates, which has a better cooling effect when the liquid cooling plate is only provided at the bottom of the battery module. In the prior art, a liquid inlet joint and a liquid outlet joint are provided on the shell of the battery pack, and each liquid inlet and each liquid outlet inside the battery pack are connected to multiple pipes through pipe joints, and connected to the liquid inlet joint and liquid outlet joint on the battery pack shell.

[0004] However, the above method of connecting multiple liquid inlets or liquid outlets in the battery pack to a liquid inlet joint or liquid outlet joint through pipes will result in a large number of pipes connected inside the battery pack. In addition, the pipes are connected by pipe joints. When the battery pack vibrates for a long time, the connection of the pipes in the battery pack is likely to loosen, which may lead to the risk of leakage in the battery pack, making it difficult to ensure the safety performance of the battery pack. Utility Model Content

[0005] In view of this, the utility model aims to provide a method to reduce the risk of leakage inside the battery pack, thereby improving the safety performance of the battery pack.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A battery module cooling structure comprises: two liquid cooling plates respectively abutting against the top and bottom surfaces of the battery module, each of the liquid cooling plates being provided with a liquid inlet and a liquid outlet; a plurality of connectors configured to be connected to each of the liquid inlets and / or each of the liquid outlets; each of the connectors having an internal end connected to each of the liquid inlets and / or each of the liquid outlets, and an external end penetrating through and extending to the outside of the battery pack shell, each of the external ends being connected to a cooling liquid circulation pipeline.

[0008] Furthermore, the multiple joints connecting the liquid inlets are a liquid inlet joint group, and the multiple joints connecting the liquid outlets are a liquid outlet joint group; the liquid inlet joint group and the liquid outlet joint group are arranged at opposite ends of the liquid cooling plate along the width direction of the liquid cooling plate.

[0009] Furthermore, two branch pipes are respectively connected to the liquid inlet joint group and the liquid outlet joint group; the branch pipe includes a main pipe connected to the coolant circulation pipeline, and a plurality of branch pipes formed by branches of the main pipe; each of the branch pipes is connected to each of the joints in the liquid inlet joint group and / or the liquid outlet joint group.

[0010] Furthermore, each of the main pipes is connected to the coolant circulation pipeline via a first three-way joint; and each of the branch pipes is connected to the corresponding main pipe via a second three-way joint.

[0011] Furthermore, each of the external connection ends passes through the same end surface of the battery pack shell.

[0012] Furthermore, a mounting portion is provided on the external connection end; a plurality of mounting holes are provided on the mounting portion, and the external connection end is fixedly connected to the battery pack shell through cooperation between the mounting holes and the connecting piece.

[0013] Furthermore, the connecting member is a bolt.

[0014] Furthermore, a sealing structure surrounding the external connection end is provided between the mounting portion and the battery pack shell.

[0015] Furthermore, any of the liquid cooling plates is integrated on the top wall or the bottom wall of the battery pack shell.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The battery module cooling structure described in the utility model, by providing a joint that passes through the battery pack shell, arranges the external connection end of the joint outside the battery pack shell, so that the coolant circulation pipeline is connected to the joint outside the battery pack, reduces the risk of leakage inside the battery pack, thereby improving the safety performance of the battery pack and has good practicality.

[0018] The multiple joints connecting the liquid inlets and the multiple joints connecting the liquid outlets are divided into two joint groups, namely, a liquid inlet joint group and a liquid outlet joint group, and the two joint groups are arranged at opposite ends of the liquid cooling plate along the width direction of the liquid cooling plate. By arranging the two joint groups separately, when each joint is connected to the coolant circulation pipeline, the pipelines connecting the joints are prevented from crossing each other, thereby facilitating the connection between the joints and the coolant circulation pipeline. At the same time, the length of the connecting pipe is reduced, so that the two liquid cooling plates can be connected to the coolant circulation pipeline.

[0019] The coolant circulation pipeline is connected to the liquid inlet joint group and the liquid outlet joint group through a branch pipeline. The branch pipeline includes a main pipe connected to the coolant circulation pipeline and multiple branch pipes formed by the main pipe branches. Each branch pipe is connected to each joint in each joint group. The length of the pipeline is reduced and the connection operation of the pipeline is simplified, so that the two liquid cooling plates can be connected to the coolant circulation pipeline.

[0020] Each main pipe is connected to the coolant circulation pipeline through the first three-way joint, and each branch pipe is connected to the corresponding main pipe through the second three-way joint. By connecting each pipeline with a three-way joint, it is convenient to connect each pipeline to each other and perform maintenance work.

[0021] The external connection ends of each connector are all passed through the same end face of the battery pack shell, so as to facilitate the connection operation between the branch pipe and the connector, and also facilitate the inspection and maintenance of the connection points of each connector.

[0022] The external connection end is provided with a mounting portion, and the external connection end is fixedly connected to the battery pack housing through the mounting portion, thereby improving the stability of the connection between the external connection portion and the connector and the battery pack housing. At the same time, the mounting portion uses bolts as connecting parts, which has a good fixing effect and can be easily disassembled to facilitate maintenance of the battery pack.

[0023] A sealing structure surrounding the external connection end is provided between the mounting portion and the battery pack shell, which can seal the gap between the mounting portion and the battery pack shell, thereby improving the sealing performance of the battery pack shell.

[0024] Any liquid cooling plate can be integrated on the top wall or the bottom wall of the battery pack housing, which improves the compactness of the battery pack and can reduce the volume of the battery pack to a certain extent.

[0025] Another object of the present invention is to provide a battery pack, in which the battery module cooling structure as described above is provided.

[0026] The battery pack and battery module cooling structure described in the present invention has the same technical effect as the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the battery module cooling structure according to the first embodiment of the present utility model;

[0029] Figure 2This is a schematic diagram of the structure of two liquid cooling plates loaded with battery modules according to the first embodiment of the present utility model;

[0030] Figure 3 For the utility model Figure 2 An enlarged view of the position described in A;

[0031] Figure 4 This is a structural schematic diagram of the assembly of the battery module cooling structure and the battery pack housing according to the first embodiment of the present utility model;

[0032] Figure 5 It is a front view of the assembly of the battery module cooling structure and the battery pack housing according to the first embodiment of the utility model;

[0033] Figure 6 A front view of an implementation form of assembling the battery module cooling structure and the battery pack housing according to the first embodiment of the utility model;

[0034] Figure 7 For the utility model Figure 4 The cross-sectional view shown at position AA;

[0035] Figure 8 For the utility model Figure 4 The cross-sectional view shown at the BB position;

[0036] Description of reference numerals:

[0037] 1. Liquid cooling plate; 101. Liquid inlet; 102. Liquid outlet;

[0038] 2. Connector; 201. Internal end; 202. External end; 203. Mounting part; 204. Mounting hole; 205. Connector; 206. Sealing structure;

[0039] 2a, liquid inlet joint group; 2b, liquid outlet joint group; 3, liquid inlet pipe; 4, liquid outlet pipe; 5, connecting pipe;

[0040] 6. Branch pipeline; 601. Main pipeline; 602. Branch pipeline; 603. First three-way joint; 604. Second three-way joint;

[0041] 7. Battery pack shell; 701. Lower shell; 702. Upper shell. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0043] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0046] Embodiment 1

[0047] This embodiment relates to a battery module cooling structure, which can cool the battery module in the battery pack. Figure 1 , Figure 2 , Figure 3 As shown, the battery module cooling structure of this embodiment includes two liquid cooling plates 1 attached to the top and bottom surfaces of the battery module, and a joint 2 connecting the two liquid cooling plates 1 .

[0048] Among them, each liquid cooling plate 1 is provided with a liquid inlet 101 and a liquid outlet 102, and the connector 2 is set to be multiple and configured on each liquid inlet 101 and each liquid outlet 102, that is, a connector 2 is provided on any liquid inlet 101 or liquid outlet 102. The specifications of each connector 2 are the same, and the connector 2 has an internal end 201 connected to each liquid inlet 101 or each liquid outlet 102, and an external connection end 202 that penetrates and extends to the outside of the battery pack shell 7. The external connection end 202 of each connector 2 is connected to the coolant circulation pipeline.

[0049] It is understandable that, since the external connection end 202 of the connector 2 is connected to the coolant circulation pipeline, there is a certain risk of leakage at the connection between the external connection end 202 and the coolant circulation pipeline compared to an integrated pipeline. In addition, when the battery pack is loaded on the vehicle and is subjected to long-term vibration and impact as the vehicle travels, the risk of leakage at the connection between the external connection end 202 and the coolant circulation pipeline will be significantly increased. At the same time, during the assembly operation of connecting the coolant circulation pipeline to the connector 2, improper operation will also cause a significant increase in the risk of leakage.

[0050] In this embodiment, the external connection end 202 passes through the battery pack shell 7 and extends to the outside of the battery pack shell 7. Only the internal end 201 of the connector 2 is directly connected to the liquid cooling plate 1 inside the battery pack. In the specific implementation, the internal end 201 is directly connected to the liquid inlet 101 or the liquid outlet 102 on the liquid cooling plate 1 by welding, which reduces the use of the connector 2 and the pipeline inside the battery pack, thereby reducing the risk of leakage inside the battery pack. Even if the external connection end 202 outside the battery pack shell 7 leaks, the leaked coolant will not enter the battery pack shell 7 and affect the normal operation of the electrical components in the battery pack, thereby improving the safety performance of the battery pack.

[0051] As mentioned above, Figure 1 , Figure 2 , Figure 4 As shown, by setting the connector 2 to pass through the battery pack shell 7, the external connection end 202 of the connector 2 is arranged outside the battery pack shell 7, so that the coolant circulation pipeline is connected to the connector 2 outside the battery pack, reducing the risk of leakage inside the battery pack, thereby improving the safety performance of the battery pack and having good practicality.

[0052] Based on the above overall introduction, specifically, each liquid inlet 101 and each liquid outlet 102 on the two liquid cooling plates 1 of this embodiment are arranged on two opposite surfaces of the two liquid cooling plates 1, that is, each liquid inlet 101 and each liquid outlet 102 are arranged on the side facing the battery module, thereby avoiding the connector 2 from occupying the internal space of the battery pack and improving the compactness of the battery pack.

[0053] In order to facilitate the connection of the two liquid cooling plates 1 to the cooling liquid circulation pipeline, in this embodiment, Figure 2 , Figure 5 , Figure 6 As shown, the multiple joints 2 connecting each liquid inlet 101 are the liquid inlet joint group 2a, and the multiple joints 2 connecting each liquid outlet 102 are the liquid outlet joint group 2b. The liquid inlet joint group 2a and the liquid outlet joint group 2b are arranged at opposite ends of the liquid cooling plate 1 along the width direction of the liquid cooling plate 1. Figure 7 , Figure 8As shown, the two connectors 2 respectively connected to the liquid inlet 101 or the liquid outlet 102 can be distinguished, and the two connectors 2, i.e., the connector 2 connected to the liquid inlet 101 and the connector 2 connected to the liquid outlet 102, are arranged at two opposite ends of the liquid cooling plate 1. From the length direction of any liquid cooling plate 1, the above two connectors 2 are arranged on the left and right sides relative to the center of the battery pack.

[0054] It can be understood that the coolant circulation pipeline includes an inlet pipe 3 and an outlet pipe 4. If the above-mentioned two types of joints 2 are not separately arranged at the opposite ends of the liquid cooling plate 1, when the inlet pipe 3 or the outlet pipe 4 is connected to the corresponding joint 2, the connecting pipes 5 used to connect the corresponding joints 2 will cross each other, which is not convenient for connecting each liquid cooling plate 1 with the coolant circulation pipeline. At the same time, the crossing of each pipe will increase the use length of the connecting pipe 5, resulting in an increase in the use cost of the battery module cooling structure.

[0055] Therefore, by separately arranging the two types of joints 2, the corresponding liquid inlet pipe 3 and liquid outlet pipe 4 can be arranged near the liquid inlet 101 and the liquid outlet 102 according to the positions of the two types of joints 2, avoiding the problem of the connecting pipes 5 crossing each other, so as to facilitate the connection between the joints 2 and the coolant circulation pipeline, and at the same time reduce the length of the connecting pipe 5, so as to facilitate the connection of the two liquid cooling plates 1 to the coolant circulation pipeline. As an implementation method of connecting the liquid cooling plate 1 to the coolant circulation pipeline, as shown in FIG. Figure 5 As shown, the coolant circulation pipeline can be connected to the two liquid cooling plates 1 through the above-mentioned connecting pipe 5, one end of a connecting pipe 5 is connected to a joint 2, and the other end is connected to the liquid inlet pipe 3 or the liquid outlet pipe 4 corresponding to the joint 2.

[0056] In order to further facilitate the connection of the two liquid cooling plates 1 with the cooling liquid circulation pipeline, as another implementation method of connecting the liquid cooling plates 1 to the cooling liquid circulation pipeline, as shown in FIG. Figure 1 , Figure 4 , Figure 5 As shown, this embodiment also includes two branch pipes 6 connected to the liquid inlet joint group 2a and the liquid outlet joint group 2b respectively, and the branch pipe 6 includes a main pipe 601 connected to the coolant circulation pipeline, and a plurality of branch pipes 602 formed by the main pipe 601, each branch pipe 602 is connected to each joint 2 in the liquid inlet joint group 2a and / or the liquid outlet joint group 2b. Specifically, the branch pipe 6 connected to the liquid inlet pipe 3 is connected to the joint 2 connected to each liquid inlet port 101, and the branch pipe 6 connected to the liquid outlet pipe 4 is connected to the joint 2 connected to each liquid outlet port 102.

[0057] At the same time, since the branch pipe 602 is formed by the branch of the main pipe 601 and is connected to each joint 2 in the liquid inlet joint group 2a or the liquid outlet joint group 2b, the length of the pipeline is reduced compared to the connection method using the connecting pipe 5 as described above. In the process of connecting any joint 2 group, each branch pipe 602 is connected to the corresponding joint 2, and then the main pipe 601 of the branch pipe 6 is connected to the coolant circulation pipeline, which simplifies the connection operation of the pipeline and facilitates the connection of the two liquid cooling plates 1 to the coolant circulation pipeline. In the specific implementation, each liquid cooling plate 1 of this embodiment has only one liquid inlet 101 and one liquid outlet 102, and accordingly, each branch pipe 6 has two branch pipes 602 for connecting the joint 2, and the end of the branch pipe 602 is provided with a female connector 2 that can be quickly connected to the joint 2.

[0058] In order to facilitate the connection and maintenance of each pipeline, Figure 6 As shown, each main pipe 601 of this embodiment is connected to the coolant circulation pipeline through the first three-way joint 603, which is convenient for the connection and installation of the branch pipe 6. At the same time, when a fault occurs between the branch pipe 6 and the liquid inlet pipe 3 or the liquid outlet pipe 4, it can be disassembled and maintained through the first three-way joint 603. In addition, each branch pipe 602 is connected to the corresponding main pipe 601 through the second three-way joint 604, so that each branch pipe 602 is connected to the corresponding main pipe 601, and it is convenient for the disassembly and maintenance of the branch pipe 6. In the specific implementation, the first three-way joint 603 is T-shaped to keep the liquid inlet pipe 3 and the liquid outlet pipe 4 straight, and the second three-way joint 604 is Y-shaped to reduce the flow resistance at the branch of the main pipe 601 and the branch pipe 602 in the branch pipe 6. Of course, the branch pipe 6 of this embodiment can also use an integrally formed pipe joint 2 to reduce the use of the three-way joint 2 and reduce the risk of leakage.

[0059] In order to facilitate the connection of each connector 2 with the coolant circulation pipeline, in this embodiment, each external connection end 202 is penetrated through the same end face of the battery pack shell 7. It can be understood that each external connection end 202 is set to penetrate the same end face of the battery pack shell 7, so that each connector 2 and the branch pipe 6 or connecting pipe 5 connected thereto are located on the same side of the battery pack. In addition to facilitating the connection of each pipe, such a setting can also facilitate the inspection and maintenance of the connection of each connector 2. When leakage occurs at the connector 2, it can be discovered and repaired in time. In specific implementation, the external connection end 202 of each connector 2 is penetrated through one end face of the battery pack shell 7 provided with a terminal panel, so as to facilitate the maintenance of the battery pack.

[0060] Since the external connection end 202 of each connector 2 penetrates the battery pack housing 7, in order to improve the stability of the connection between the connector 2 and the battery pack and prevent the battery pack housing 7 from vibrating and colliding with the external connection end 202, thereby increasing the risk of leakage, such as Figure 3As shown, the external connection end 202 of this embodiment is provided with a mounting portion 203, and the mounting portion 203 is provided with a plurality of mounting holes 204. The external connection end 202 is fixedly connected to the battery pack housing 7 through the cooperation between the mounting holes 204 and the connecting member 205. The arrangement of the mounting portion 203 enables the external connection end 202 to be fixedly connected to the battery pack housing 7, thereby improving the stability of the connection between the connector 2 and the battery pack housing 7.

[0061] In order to facilitate the maintenance and inspection of the liquid cooling plate 1 or other electrical components inside the battery pack shell 7, the connecting piece 205 of this embodiment is a bolt, which has a good fixing effect, and the mounting part 203 is detachably fixed to the battery pack shell 7 by bolts, which is convenient for the disassembly and assembly of the connector 2, thereby facilitating the maintenance and inspection of the inside of the battery pack shell 7.

[0062] Since the external connection end 202 of the connector 2 is arranged to penetrate the battery pack housing 7, in order to improve the sealing performance of the battery pack housing 7, a sealing structure 206 surrounding the external connection end 202 is provided between the mounting portion 203 and the battery pack housing 7 of this embodiment. By providing the sealing structure 206, the gap between the mounting portion 203 and the battery pack housing 7 can be blocked, thereby improving the sealing performance of the battery pack housing 7. In specific implementation, the sealing structure 206 can be made of materials well known to those skilled in the art, such as a sealing ring, a sealing pad, a sealing foam, etc., as long as the gap between the mounting portion 203 and the battery pack housing 7 can be blocked.

[0063] In order to improve the compactness of the battery pack and reduce the volume of the battery pack, in this embodiment, any liquid cooling plate 1 is integrated on the top wall or bottom wall of the battery pack shell 7, so that the liquid cooling plate 1 constitutes a part of the battery pack shell 7, thereby reducing the occupation of the internal space of the battery pack by the cooling structure of the battery module, improving the compactness of the battery pack, and reducing the overall volume of the battery pack to a certain extent. In specific implementation, the battery pack of this embodiment includes a lower shell 701 and an upper shell 702, and the upper shell 702 is buckled on the lower shell 701. The liquid cooling plate 1 located at the bottom of the battery module is integrated in the lower shell 701.

[0064] In summary, the battery module cooling structure of the present embodiment, by providing a connector 2 that passes through the battery pack shell 7, arranges the external connection end 202 of the connector 2 outside the battery pack shell 7, so that the coolant circulation pipeline is connected to the connector 2 outside the battery pack, thereby reducing the risk of leakage inside the battery pack, thereby improving the safety performance of the battery pack and having good practicality.

[0065] Embodiment 2

[0066] The present embodiment relates to a battery pack. In terms of overall structure, the battery pack of the present embodiment is provided with a battery module cooling structure as described in the first embodiment.

[0067] The battery pack of this embodiment, by providing a battery module cooling structure, can reduce the risk of leakage and improve the safety performance of the battery pack compared to the prior art, thus having good practicality.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module cooling structure, characterized in that: include: Two liquid cooling plates are respectively attached to the top and bottom surfaces of the battery module, and each of the liquid cooling plates is provided with a liquid inlet and a liquid outlet; The connector is configured to be configured to be connected to each of the liquid inlets and / or each of the liquid outlets; each of the connectors has an internal end connected to each of the liquid inlets and / or each of the liquid outlets, and an external end that passes through and extends to the outside of the battery pack shell, and each of the external ends is connected to the coolant circulation pipeline.

2. The battery module cooling structure according to claim 1, characterized in that: The plurality of connectors connected to the liquid inlets are a liquid inlet connector group, and the plurality of connectors connected to the liquid outlets are a liquid outlet connector group; The liquid inlet joint group and the liquid outlet joint group are arranged at opposite ends of the liquid cooling plate along the width direction of the liquid cooling plate.

3. The battery module cooling structure according to claim 2, characterized in that: Also includes: Two branch pipes, respectively connected to the liquid inlet joint group and the liquid outlet joint group; The branch pipeline includes a main pipe connected to the coolant circulation pipeline, and a plurality of branch pipes formed by branches of the main pipe; Each of the branch pipes is connected to each of the joints in the liquid inlet joint group and / or the liquid outlet joint group.

4. The battery module cooling structure according to claim 3, characterized in that: Each of the main pipes is connected to the coolant circulation pipeline via a first three-way joint; Each of the branch pipes is connected to the corresponding main pipe via a second three-way joint.

5. The battery module cooling structure according to claim 1, characterized in that: Each of the external connection ends passes through the same end surface of the battery pack shell.

6. The battery module cooling structure according to any one of claims 1 to 5, characterized in that: The external connection end is provided with a mounting portion; The mounting portion is provided with a plurality of mounting holes, and the external connection end is fixedly connected to the battery pack housing through cooperation between the mounting holes and the connecting piece.

7. The battery module cooling structure according to claim 6, characterized in that: The connecting piece is a bolt.

8. The battery module cooling structure according to claim 6, characterized in that: A sealing structure surrounding the external connection end is provided between the mounting portion and the battery pack shell.

9. The battery module cooling structure according to claim 1, characterized in that: Any of the liquid cooling plates is integrated on the top wall or the bottom wall of the battery pack housing.

10. A battery pack, characterized in that: The battery pack is provided with the battery module cooling structure according to any one of claims 1 to 9.

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