Battery pack liquid cooling plate assembly and battery pack

Abstract

The application relates to the technical field of batteries, in particular to a battery pack liquid cooling plate assembly and a battery pack. The battery pack liquid cooling plate assembly comprises a liquid inlet pipeline, a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate and a liquid outlet pipeline. Along a first preset direction, the first liquid cooling plate and the second liquid cooling plate are arranged on the two sides of the third liquid cooling plate respectively, and form a plurality of mounting spaces, and the mounting spaces are used for mounting battery cells; the liquid inlet pipeline is in communication with the first liquid cooling plate; the liquid outlet pipeline is in communication with the second liquid cooling plate; and the third liquid cooling plate is in communication with the two lateral liquid cooling plates respectively. It can be seen that the lateral and longitudinal liquid cooling plates are arranged in the application, the cooling effect is greatly improved, the adapter component is arranged in the application, the lateral liquid cooling plates and the third liquid cooling plate on the two sides are connected together in cooperation with the sealing ring, the joints and pipeline components are removed, the connecting structure is simplified, the space utilization is improved, and the weight is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack liquid cooling plate assembly and a battery pack. Background Technology

[0002] Compared to automotive battery packs, aircraft battery packs have higher requirements for space utilization and energy density. Therefore, it is often necessary to arrange multiple layers and rows of cells inside the aircraft battery pack to improve energy density. To ensure the performance of the cells, liquid cooling plates are required. However, according to the current cooling structure of battery packs in the industry, liquid cooling plates are only placed on the top or bottom of the overall structure composed of multiple layers and rows of cells, resulting in poor cooling effect. Utility Model Content

[0003] The purpose of this application is to provide a battery pack liquid cooling plate assembly and a battery pack, which to a certain extent solves the technical problem of the urgent need to develop a liquid cooling plate structure that is suitable for use in aircraft battery packs, has a good cooling effect on the battery cells, and occupies little space.

[0004] This application provides a battery pack liquid cooling plate assembly, including: an inlet pipe, a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate, and an outlet pipe; wherein, along a first preset direction, the first liquid cooling plate and the second liquid cooling plate are respectively disposed on both sides of the third liquid cooling plate, forming a plurality of mounting spaces, and the mounting spaces are used for mounting battery cells; the inlet pipe is connected to the first liquid cooling plate; The liquid outlet pipe is connected to the second liquid cooling plate; the third liquid cooling plate is connected to the first liquid cooling plate and the second liquid cooling plate respectively, so that the cooling liquid enters through the liquid inlet pipe, flows through the first liquid cooling plate, the third liquid cooling plate and the second liquid cooling plate in sequence, and finally flows out through the liquid outlet pipe.

[0005] In the above technical solution, the battery pack liquid cooling plate assembly further includes a first adapter assembly, and the first adapter assembly includes a first adapter member and a first sealing ring; wherein, the first adapter member forms a first flow guiding cavity, the liquid inlet of the first flow guiding cavity is connected to the liquid outlet of the first liquid cooling plate, and the liquid outlet of the first flow guiding cavity is connected to the liquid inlet of the third liquid cooling plate. At least one of the liquid outlet of the first liquid cooling plate and the liquid inlet of the third liquid cooling plate is provided in a protruding state and inserted into the first flow guide cavity, and a first sealing ring in a compressed state is provided between the first flow guide cavity and the inner wall of the first flow guide cavity.

[0006] In any of the above technical solutions, the inlet of the first flow guide cavity of the first adapter component is connected to the outlet of the first liquid cooling plate by welding.

[0007] In any of the above technical solutions, further, one of the liquid inlet of the first flow guide cavity of the first adapter component and the liquid outlet of the first liquid cooling plate is arranged in a protruding state.

[0008] In any of the above technical solutions, the inlet of the first flow guide cavity of the first adapter component is arranged opposite to the outlet of the first liquid cooling plate.

[0009] In any of the above technical solutions, the liquid outlet of the first flow guide cavity of the first transition component is arranged opposite to the liquid inlet of the third liquid cooling plate.

[0010] In any of the above technical solutions, the first adapter is further disposed within the corresponding installation space, and along the second preset direction, the end of the first adapter closer to the installation space is disposed.

[0011] In any of the above technical solutions, the liquid outlet of the first liquid cooling plate and the liquid inlet of the third liquid cooling plate are located in the same installation space and are arranged close to each other.

[0012] In any of the above technical solutions, the battery pack liquid cooling plate assembly further includes a second adapter assembly, and the second adapter assembly includes a second adapter member and a second sealing ring; wherein, the second adapter member forms a second flow guiding cavity, the liquid inlet of the second flow guiding cavity is connected to the liquid outlet of the third liquid cooling plate, and the liquid outlet of the second flow guiding cavity is connected to the liquid inlet of the second liquid cooling plate. At least one of the liquid inlet of the second liquid cooling plate and the liquid outlet of the third liquid cooling plate is provided in a protruding state and inserted into the second flow guide cavity, and a second sealing ring in a compressed state is provided between the second flow guide cavity and the inner wall of the second flow guide cavity.

[0013] In any of the above technical solutions, the outlet of the second flow guide cavity of the second adapter component is further connected to the inlet of the second liquid cooling plate by welding.

[0014] In any of the above technical solutions, one of the liquid outlet of the second flow guide cavity of the second adapter component and the liquid inlet of the second liquid cooling plate is further configured as a protrusion.

[0015] In any of the above technical solutions, the inlet of the second flow guide cavity of the second transition component is arranged opposite to the outlet of the third liquid cooling plate.

[0016] In any of the above technical solutions, the outlet of the second flow guide cavity of the second transition component is arranged opposite to the inlet of the second liquid cooling plate.

[0017] In any of the above technical solutions, the second adapter is further disposed within the corresponding installation space, and along the second preset direction, the end of the second adapter is disposed near the installation space.

[0018] In any of the above technical solutions, the liquid inlet of the second liquid cooling plate and the liquid outlet of the third liquid cooling plate are located in the same installation space and are arranged close to each other.

[0019] In any of the above technical solutions, further, along the third preset direction, a portion of the third liquid cooling plate forms an inlet channel, another portion of the third liquid cooling plate forms an outlet channel, and the inlet channel and the outlet channel are connected through a connecting channel in the third liquid cooling plate to form a U-shaped channel; The inlet of the liquid inlet channel is connected to the outlet of the first liquid cooling plate, and the outlet of the liquid outlet channel is connected to the inlet of the second liquid cooling plate.

[0020] In any of the above technical solutions, the number of liquid inlet channels is multiple, and they are arranged sequentially at intervals along the third preset direction.

[0021] In any of the above technical solutions, the number of liquid outlet channels is multiple, and they are arranged sequentially at intervals along the third preset direction.

[0022] In any of the above technical solutions, the first liquid cooling plate further comprises a U-shaped first liquid cooling channel.

[0023] In any of the above technical solutions, the second liquid cooling plate further comprises a U-shaped second liquid cooling channel.

[0024] In any of the above technical solutions, the liquid inlet pipe is further disposed at one end of the first liquid cooling plate along a second preset direction.

[0025] In any of the above technical solutions, the liquid outlet pipe is further disposed at one end of the second liquid cooling plate along a second preset direction.

[0026] In any of the above technical solutions, the first liquid cooling plate and the second liquid cooling plate are respectively arranged on opposite sides adjacent to the third liquid cooling plate.

[0027] In any of the above technical solutions, the first liquid cooling plate is further provided with the installation space on both sides along the third preset direction.

[0028] In any of the above technical solutions, the second liquid cooling plate is further provided with the installation space on both sides along the third preset direction.

[0029] In any of the above technical solutions, the first liquid cooling plate and the third liquid cooling plate are further arranged perpendicularly.

[0030] In any of the above technical solutions, the second liquid cooling plate is further arranged perpendicularly to the third liquid cooling plate.

[0031] In any of the above technical solutions, the first liquid cooling plate and the second liquid cooling plate are both arranged parallel to the first preset direction, and the third liquid cooling plate is arranged parallel to the third preset direction.

[0032] In any of the above technical solutions, the first liquid cooling plate and the second liquid cooling plate are located on the same straight line.

[0033] In any of the above technical solutions, a waist-shaped hole is further formed on the side of the first liquid cooling plate and the second liquid cooling plate that is opposite to each other along the first preset direction, and the waist-shaped hole extends along the first preset direction.

[0034] In any of the above technical solutions, further, there are two third liquid cooling plates, which are arranged sequentially along the width direction of the third liquid cooling plates. Along the width direction of the third liquid cooling plates, one of the third liquid cooling plates is disposed on one side of the first liquid cooling plate and the second liquid cooling plate, and the other third liquid cooling plate is disposed on the opposite side of the first liquid cooling plate and the second liquid cooling plate. The two third liquid cooling plates are symmetrically arranged with respect to the first liquid cooling plate and the second liquid cooling plate. The first liquid cooling plate is connected to one of the third liquid cooling plates, the second liquid cooling plate is connected to the other third liquid cooling plate, and the two third liquid cooling plates are connected together.

[0035] This application also provides a battery pack, including battery cells and a battery pack liquid cooling plate assembly as described in any of the above technical solutions. A plurality of battery cells are stacked sequentially along a second preset direction within the mounting space formed by the first, second, and third liquid cooling plates in the battery pack liquid cooling plate assembly. Therefore, it possesses all the beneficial technical effects of this battery pack liquid cooling plate assembly, which will not be elaborated further here.

[0036] In the above technical solution, the first liquid cooling plate is further bonded to the adjacent battery cell by thermally conductive structural adhesive.

[0037] In any of the above technical solutions, the second liquid cooling plate is further bonded to the adjacent battery cell by a thermally conductive structural adhesive.

[0038] In any of the above technical solutions, the third liquid cooling plate is further bonded to the adjacent battery cell by thermally conductive structural adhesive.

[0039] Compared with the prior art, the beneficial effects of this application are as follows: The battery pack liquid cooling plate assembly provided in this application includes a first liquid cooling plate, a second liquid cooling plate, and a third liquid cooling plate. The first, second, and third liquid cooling plates enclose multiple installation spaces, and the battery cells in each installation space can be cooled by the first, second, and third liquid cooling plates, greatly improving the cooling effect. Moreover, the first, second, and third liquid cooling plates abut against the bottom, top, and sides of each row of battery cells, greatly saving space and improving space utilization. Furthermore, the transverse liquid cooling plates on both sides of the third liquid cooling plate are assembled and connected with the third liquid cooling plate to form a complete flow path. This reduces the number of components, reduces the space occupied, improves space utilization, and also helps to reduce weight. In this application, a first adapter component, in conjunction with a sealing ring, is used to directly connect the liquid outlet of the first liquid cooling plate and the liquid inlet of the third liquid cooling plate. A second adapter component, in conjunction with a sealing ring, is used to directly connect the liquid outlet of the second liquid cooling plate and the liquid inlet of the third liquid cooling plate. This eliminates the need for connectors and pipes, simplifies the connection structure, improves space utilization, and reduces weight. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the battery pack liquid cooling plate assembly provided in the embodiments of this application; Figure 2 This is another structural schematic diagram of the battery pack liquid cooling plate assembly provided in an embodiment of this application; Figure 3 Another structural schematic diagram of the battery pack liquid cooling plate assembly provided in the embodiments of this application; Figure 4 Another structural schematic diagram of the battery pack liquid cooling plate assembly provided in the embodiments of this application; Figure 5 for Figure 4 A sectional view along section AA; Figure 6 Another structural schematic diagram of the battery pack liquid cooling plate assembly provided in the embodiments of this application; Figure 7 for Figure 6 A sectional view along section BB; Figure 8 for Figure 7 A magnified structural diagram at point C; Figure 9 Another structural schematic diagram of the battery pack liquid cooling plate assembly provided in the embodiments of this application; Figure 10 for Figure 9 A sectional view along section DD; Figure 11 This is a schematic diagram of the internal structure of the battery pack provided in an embodiment of this application; Figure 12 This is another internal structure diagram of the battery pack provided in an embodiment of this application; Figure 13 This is a state diagram of the battery pack internals of the battery pack liquid cooling plate assembly provided in an embodiment of this application.

[0042] Figure label: 1-Liquid inlet pipe, 2-First liquid cooling plate, 21-Liquid inlet of the first liquid cooling plate, 22-First liquid cooling channel, 23-Liquid outlet of the first liquid cooling plate, 3-First adapter assembly, 31-First adapter component, 32-First sealing ring, 33-First guide cavity, 4-Third liquid cooling plate, 41-Liquid inlet of the third liquid cooling plate, 42-Liquid inlet channel, 43-Connecting channel, 44-Liquid outlet channel, 45-Liquid outlet of the third liquid cooling plate, 5-Second adapter assembly, 51-Second adapter component, 52-Second sealing ring, 53-Second guide cavity, 6-Second liquid cooling plate, 61-Liquid inlet of the second liquid cooling plate, 62-Second liquid cooling channel, 63-Liquid outlet of the second liquid cooling plate, 7-Liquid outlet pipe, 8-Battery cell, 11-Oval hole, 12-Installation space, a-First preset direction, b-Second preset direction, c-Third preset direction. Detailed Implementation

[0043] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0044] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0045] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0046] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The following reference Figures 1 to 13 This application describes a battery pack liquid cooling plate assembly and a battery pack according to some embodiments thereof.

[0049] Example 1 See Figures 1 to 4 , Figures 11 to 13 As shown, an embodiment of this application provides a battery pack liquid cooling plate assembly, including: a first liquid cooling plate 2, a second liquid cooling plate 6, a third liquid cooling plate 4, an inlet pipe 1, and an outlet pipe 7; wherein, along a first preset direction a, the first liquid cooling plate 2 and the second liquid cooling plate 6 are respectively disposed on both sides of the third liquid cooling plate 4, forming a plurality of mounting spaces 12, and the mounting spaces 12 are used to mount battery cells 8; the inlet pipe 1 is connected to the first liquid cooling plate 2; The liquid outlet pipe 7 is connected to the second liquid cooling plate 6; the third liquid cooling plate 4 is connected to the first liquid cooling plate 2 and the second liquid cooling plate 6 respectively, so that the cooling liquid enters through the liquid inlet pipe 1, flows through the first liquid cooling plate 2, the third liquid cooling plate 4 and the second liquid cooling plate 6 in sequence, and finally flows out through the liquid outlet pipe 7.

[0050] As can be seen from the structure described above, the battery pack liquid cooling plate assembly provided in this application includes a first liquid cooling plate 2, a second liquid cooling plate 6, and a third liquid cooling plate 4. The first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4 enclose multiple installation spaces 12. The battery cells 8 in each installation space 12 can be cooled by the first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4, which greatly improves the cooling effect. Moreover, the first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4 can be set close to the battery cells 8, which greatly saves space and improves space utilization. Furthermore, the first liquid cooling plate 2 and the second liquid cooling plate 6 on both sides of the third liquid cooling plate 4 are assembled and connected together with the third liquid cooling plate 4 to form a complete flow path. This can reduce the number of parts, reduce the space occupied, improve space utilization, and also reduce weight. Furthermore, preferably, the first liquid cooling plate 2 and the third liquid cooling plate 4 are arranged perpendicularly to meet the actual use requirements, but of course, it is not limited to this.

[0051] Furthermore, preferably, the second liquid cooling plate 6 is arranged perpendicularly to the third liquid cooling plate 4 to meet the usage requirements, but of course, it is not limited to this.

[0052] Further, preferably, in Figure 1 In the original text, the first preset direction 'a' is horizontal. However, in actual use, the liquid cooling plate assembly of this battery pack is rotated 90° during installation, meaning the first preset direction 'a' becomes vertical (see reference). Figure 13 Therefore, the first preset direction 'a' is selected based on actual needs and is not limited to the aforementioned horizontal and vertical directions.

[0053] Furthermore, preferably, the first liquid cooling plate 2 and the second liquid cooling plate 6 are parallel to the first preset direction a, for example... Figure 1 In the horizontal direction, the third liquid cooling plate 4 is parallel to the third preset direction c, for example. Figure 1 Regarding the vertical direction setting, it should be noted that the third preset direction c changes depending on the installation orientation of the liquid cooling plate assembly of this battery pack. It is not limited to the vertical direction mentioned above; for example, it can also be the horizontal direction, etc. The specific direction should be selected according to actual needs.

[0054] Furthermore, preferably, the liquid inlet pipe 1 is connected to the liquid inlet 21 of the first liquid cooling plate, and the liquid outlet pipe 7 is connected to the liquid outlet 63 of the second liquid cooling plate.

[0055] In this embodiment, preferably, as follows: Figures 1 to 4 , Figures 6 to 8 As shown, the battery pack liquid cooling plate assembly also includes a first adapter assembly 3, and the first adapter assembly 3 includes a first adapter member 31 and a first sealing ring 32; wherein, the first adapter member 31 forms a first flow guiding cavity 33, the liquid inlet of the first flow guiding cavity 33 is connected to the liquid outlet 23 of the first liquid cooling plate, and the liquid outlet of the first flow guiding cavity 33 is connected to the liquid inlet 41 of the third liquid cooling plate; At least one of the liquid outlet 23 of the first liquid cooling plate and the liquid inlet 41 of the third liquid cooling plate is provided in a protruding state and inserted into the first flow guide cavity 33. A first sealing ring 32 in a compressed state is provided between the first flow guide cavity 33 and the inner wall of the first flow guide cavity 33 to perform a sealing function. As can be seen from the structure described above, in this application, the first adapter component 31, together with the sealing ring, directly connects the liquid outlet 23 of the first liquid cooling plate and the liquid inlet 41 of the third liquid cooling plate, eliminating the need for joints and pipes, simplifying the connection structure, improving space utilization, and reducing weight.

[0056] Furthermore, preferably, the inlet of the first flow guide cavity 33 of the first adapter component 31 is connected to the outlet 23 of the first liquid cooling plate by welding. The outlet of the second flow guide cavity 53 of the first adapter component 31 can be inserted into the protruding inlet of the third liquid cooling plate 4, which is more convenient for assembly, especially for the individual transportation of parts, and assembly and use after arriving at the destination. Furthermore, preferably, the first adapter component 31 is a cuboid structure, and the first flow guide cavity 33 is a square chamber. The inlet and outlet of the first adapter component 31 are both oriented perpendicular to their corresponding side walls. It should be noted that: it is not limited to this, other structures can also be adopted, for example: the liquid outlet 23 of the first liquid cooling plate and the liquid inlet 41 of the third liquid cooling plate are both set to be protruding, and the liquid inlet of the first flow guide cavity 33 of the first adapter component 31 and the protruding liquid outlet of the first liquid cooling plate 2 are inserted together, and the liquid outlet of the first flow guide cavity 33 of the first adapter component 31 and the protruding liquid inlet of the third liquid cooling plate 4 are inserted together. That is to say, both are assembled by a plug-in structure. The specific choice depends on the actual needs. Preferably, the first adapter component 31 needs to be designed as an L-shaped structure, then the first flow guide cavity 33 is also L-shaped or only the first flow guide cavity 33 is designed as L-shaped. Of course, it is not limited to this. The first adapter component 31 can be welded to both the first liquid cooling plate 2 and the third liquid cooling plate 4, instead of using the aforementioned plug-in structure. However, the welding process between the first adapter component 31 and the third liquid cooling plate 4 in the vertical plane is relatively difficult to operate and is prone to leaks.

[0057] Furthermore, preferably, the liquid inlet of the first flow guide cavity 33 of the first adapter component 31 is in a protruding state, which facilitates welding with the liquid outlet 23 of the first liquid cooling plate and facilitates processing and manufacturing. Of course, it is not limited to this, and the liquid outlet 23 of the first liquid cooling plate can also be set in a protruding state, depending on the actual needs.

[0058] In this embodiment, preferably, as follows: Figure 8 As shown, the liquid inlet of the first flow guide cavity 33 of the first adapter component 31 is opposite to the liquid outlet 23 of the first liquid cooling plate. It can be seen that the two interfaces are set nearby, which facilitates assembly and saves materials.

[0059] In this embodiment, preferably, as follows: Figure 8 As shown, the liquid outlet of the first flow guide cavity 33 of the first adapter component 31 is positioned opposite to the liquid inlet 41 of the third liquid cooling plate, with two interfaces located nearby, which facilitates assembly and saves materials.

[0060] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the first adapter component 31 is disposed in the corresponding installation space 12, and along the second preset direction b, the first adapter component 31 is disposed at one end close to the installation space 12. Integrating the first adapter component 31 at the end of the installation space 12 avoids occupying the space of the battery cell 8, which helps to improve space utilization and increase energy density in a limited space.

[0061] Further, preferably, Figure 1 In this context, the second preset direction b is horizontal and perpendicular to the first preset direction a. Of course, it is not limited to this. As the direction of the liquid cooling plate assembly of this battery pack is reversed, the second preset direction b will also change. The specific direction can be selected according to actual needs.

[0062] Further, preferably, the first preset direction a is the width direction of the first liquid cooling plate 2 and the second liquid cooling plate 6, the second preset direction b is the length direction of the first liquid cooling plate 2 and the second liquid cooling plate 6, and the third preset direction c, as described below, is the width direction of the third liquid cooling plate 4. Of course, this is not limited to these specific directions; the first preset direction a can also be the length direction of the first liquid cooling plate 2 and the second liquid cooling plate 6, and the second preset direction b can also be the width direction of the first liquid cooling plate 2 and the second liquid cooling plate 6, etc., depending on actual needs.

[0063] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the liquid outlet 23 of the first liquid cooling plate and the liquid inlet 41 of the third liquid cooling plate are located in the same installation space 12 and are arranged close to each other. This reduces the distance between them, thereby reducing the size of the second adapter 51 and the space occupied.

[0064] It should be noted that: it is not limited to this, other structures can also be adopted, for example: the first adapter 31 is disposed below the first liquid cooling plate 2, and the liquid inlet of the first adapter 31 is disposed at the top of the first adapter 31, and the liquid outlet 23 of the first liquid cooling plate is disposed on the lower surface of the first liquid cooling plate 2. In this embodiment, preferably, as follows: Figures 1 to 4 , Figures 6 to 8 As shown, the battery pack liquid cooling plate assembly also includes a second adapter assembly 5, and the second adapter assembly 5 includes a second adapter member 51 and a second sealing ring 52; wherein, the second adapter member 51 forms a second flow guiding cavity 53, the liquid inlet of the second flow guiding cavity 53 is connected to the liquid outlet 45 of the third liquid cooling plate, and the liquid outlet of the second flow guiding cavity 53 is connected to the liquid inlet 61 of the second liquid cooling plate; At least one of the liquid inlet 61 of the second liquid cooling plate and the liquid outlet 45 of the third liquid cooling plate is provided in a protruding state and inserted into the second flow guide cavity 53, and a second sealing ring 52 in a compressed state is provided between the liquid inlet 61 of the second liquid cooling plate and the inner wall of the second flow guide cavity 53. As can be seen from the structure described above, in this application, the second adapter component 51, together with the sealing ring, directly connects the liquid outlet 63 of the second liquid cooling plate and the liquid inlet 41 of the third liquid cooling plate, eliminating the need for joints and pipes, simplifying the connection structure, improving space utilization, and reducing weight.

[0065] Furthermore, preferably, the outlet of the second flow guide cavity 53 of the second adapter component 51 is connected to the inlet 61 of the second liquid cooling plate by welding. The inlet of the second flow guide cavity 53 of the second adapter component 51 can be inserted into the protruding outlet of the third liquid cooling plate 4, which is more convenient for assembly, especially for the individual transportation of parts to the destination for assembly and use. Furthermore, preferably, the second adapter component 51 is a cuboid structure, and the second flow guide cavity 53 is a square chamber. The openings of the inlet and outlet of the second adapter component 51 are both set perpendicular to their corresponding side walls. It should be noted that: it is not limited to this, other structures can also be adopted, for example: the liquid inlet 61 of the second liquid cooling plate and the liquid outlet 45 of the third liquid cooling plate are both set to be protruding, and the liquid outlet of the first flow guide cavity 33 of the first adapter component 31 and the protruding liquid inlet of the second liquid cooling plate 6 are inserted together, and the liquid inlet of the first flow guide cavity 33 of the first adapter component 31 and the protruding liquid outlet of the third liquid cooling plate 4 are inserted together. That is to say, both sides are assembled by a plug-in structure. The specific choice depends on the actual needs. Preferably, the second adapter component 51 needs to be designed as an L-shaped structure, then the second flow guide cavity 53 is also L-shaped or only the second flow guide cavity 53 is designed as L-shaped. Of course, it is not limited to this. The second adapter 51 can also be welded to both the second liquid cooling plate 6 and the third liquid cooling plate 4, instead of using the aforementioned plug-in structure. However, the welding process between the second adapter 51 and the third liquid cooling plate 4 in the vertical plane is relatively difficult to operate and is prone to leaks. Furthermore, preferably, the liquid outlet of the second flow guide cavity 53 of the second adapter 51 is in a protruding state, which facilitates welding with the liquid inlet 61 of the second liquid cooling plate and is also convenient for processing and manufacturing. Of course, it is not limited to this, and the liquid inlet 61 of the second liquid cooling plate can also be set in a protruding state, depending on the actual needs.

[0066] In this embodiment, preferably, as follows: Figure 8 As shown, the inlet of the second flow guide cavity 53 of the second adapter component 51 is opposite to the outlet 45 of the third liquid cooling plate, and the two interfaces are set nearby, which facilitates assembly and saves materials. In this embodiment, preferably, as follows: Figure 8 As shown, the liquid outlet of the second flow guide cavity 53 of the second adapter component 51 is opposite to the liquid inlet 61 of the second liquid cooling plate, and the two interfaces are set nearby, which facilitates assembly and saves materials. In this embodiment, preferably, as follows: Figures 1 to 3As shown, the second adapter component 51 is disposed in the corresponding installation space 12, and along the second preset direction b, the second adapter component 51 is disposed at one end close to the installation space 12. The second adapter component 51 is integrated into the end of the installation space 12 formed by the second liquid cooling plate 6 and the third liquid cooling plate 4, so as to avoid occupying the space of the battery cell 8, which helps to improve the space utilization rate and increase the energy density in a limited space. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the liquid inlet 61 of the second liquid cooling plate and the liquid outlet 45 of the third liquid cooling plate are located in the same installation space 12 and are arranged close to each other. This reduces the distance between them, thereby reducing the size of the second adapter 51 and the space occupied. In this embodiment, preferably, as follows: Figure 9 and Figure 10 As shown, along the third preset direction c, a portion of the third liquid cooling plate 4 forms an inlet channel 42, and another portion of the third liquid cooling plate 4 forms an outlet channel 44. The inlet channel 42 and the outlet channel 44 are connected by a connecting channel 43 in the third liquid cooling plate 4 to form a U-shaped channel. The inlet of the liquid inlet channel 42 is connected to the outlet 23 of the first liquid cooling plate, and preferably, the inlet of the liquid inlet channel 42 is connected to the outlet of the first guide cavity 33 of the first transition member 31, thereby realizing the connection between the inlet of the liquid inlet channel 42 and the outlet 23 of the first liquid cooling plate. The outlet of the liquid outlet channel 44 is connected to the inlet 61 of the second liquid cooling plate, and preferably, the outlet of the liquid outlet channel 44 is connected to the inlet of the second guide cavity 53 of the second transition member 51, thereby realizing the connection between the outlet of the liquid outlet channel 44 and the inlet 61 of the second liquid cooling plate. As can be seen from the structure described above, the coolant entering the third liquid cooling plate 4 flows along the inlet channel 42, the connecting channel 43 and the outlet channel 44, thereby achieving all-round cooling of the upper battery cell 8 and the lower battery cell 8, improving the cooling effect, and the coolant flows in an orderly manner without causing turbulence.

[0067] It should be noted that the arrangement is not limited to the above-mentioned configuration of an inlet channel 42 at the top and an outlet channel 44 at the bottom. Alternatively, an outlet channel 44 can be provided at the top, and an inlet channel 42 at the bottom. Furthermore, when the first liquid cooling plate 2 and the second liquid cooling plate 6 are flush and at the same horizontal height, the first transition member 31 needs to be moved accordingly below the first liquid cooling plate 2, and the second transition member 51 needs to be moved accordingly above the second liquid cooling plate 6. Of course, this is not the only possibility; when an outlet channel 44 is provided at the top and an inlet channel 42 at the bottom... Alternatively, the first liquid cooling plate 2 and the second liquid cooling plate 6 can be designed to be non-aligned, meaning they are not on the same horizontal plane. In other words, the second horizontal coolant is raised, and the first liquid cooling plate 2 is lowered. The first transition component 31 can still be located above the first liquid cooling plate 2, and the second transition component 51 can still be located below the second liquid cooling plate 6. Alternatively, the height of the inlet channel and the outlet channel 44 can be changed to ensure that the first transition component 31 can still be located above the first liquid cooling plate 2, and the second transition component 51 can still be located below the second liquid cooling plate 6.

[0068] In addition, it should be noted that the specific structure of the flow channel in the third liquid cooling plate 4 is not limited to the above, and can be set arbitrarily according to actual needs, and the positions of other structural components such as the positions of the first transition component 31 and the second transition component 51 can be adjusted accordingly.

[0069] In this embodiment, preferably, as follows: Figure 10 As shown, there are multiple inlet channels 42, arranged sequentially at intervals along the third preset direction c, and each inlet channel 42 is connected to the end connecting channel 43 to accelerate the flow rate and flow area of ​​the coolant. Of course, it is not limited to this; only one inlet channel 42 may be provided, depending on the actual needs. Further, preferably, in Figure 1 In the middle, the third preset direction c is set perpendicular to the first preset direction a and the second preset direction b respectively, and preferably, the third preset direction c is the height direction of the third liquid cooling plate 4, that is, the vertical direction.

[0070] In this embodiment, preferably, as follows: Figure 10 As shown, there are multiple outlet channels 44, which are sequentially spaced along the third preset direction c. Each inlet channel 42 is connected to the end connecting channel 43, thereby accelerating the flow rate and flow area of ​​the coolant. Of course, this is not the only option; only one inlet channel 42 may be provided, depending on the actual needs.

[0071] In this embodiment, preferably, as follows: Figure 5As shown, the first liquid cooling plate 2 has a U-shaped first liquid cooling channel 22. By designing the U-shaped first cooling channel, the coolant can flow along this channel through the entire first liquid cooling plate 2, which increases the cooling area, improves the uniformity of cooling, and enhances the cooling effect. In this embodiment, preferably, as follows: Figure 5 As shown, the second liquid cooling plate 6 has a U-shaped second liquid cooling channel 62. By designing the U-shaped second cooling channel, the coolant can flow along this channel through the entire second liquid cooling plate 6, which increases the cooling area, improves the uniformity of cooling, and enhances the cooling effect. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the liquid inlet pipe 1 is located at one end of the first liquid cooling plate 2 along the second preset direction b. Integrating the liquid inlet pipe 1 into the end area of ​​the first liquid cooling plate 2 avoids occupying the space of the battery cell 8 and helps to improve space utilization. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the liquid outlet pipe 7 is located at one end of the second liquid cooling plate 6 along the second preset direction b. Integrating the liquid outlet pipe 7 into the end area of ​​the first liquid cooling plate 2 avoids occupying the space of the battery cell 8 and helps to improve space utilization. It should be noted that: in Figures 1 to 3 As shown, along the second preset direction b, the liquid inlet pipe 1 and the liquid outlet pipe 7 are located at the same end. Of course, this is not the only possibility; they can be located at opposite ends along the second preset direction b. For example, if the liquid inlet pipe 1 is located at the front end of the first liquid cooling plate 2 along the second preset direction b, then the liquid outlet pipe 7 is located at the rear end of the second liquid cooling plate 6 along the second preset direction b. Alternatively, if the liquid inlet pipe 1 is located at the rear end of the first liquid cooling plate 2 along the second preset direction b, then the liquid outlet pipe 7 is located at the front end of the second liquid cooling plate 6 along the second preset direction b. The specific choice depends on the actual needs.

[0072] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the first liquid cooling plate 2 and the second liquid cooling plate 6 are respectively arranged on opposite sides of the third liquid cooling plate 4. As can be seen from the structure described above, the first liquid cooling plate 2 and the second liquid cooling plate 6 are arranged adjacent to the third liquid cooling plate 4. This means that only the liquid inlet and outlet are opened, which can effectively reduce the length of the first transition component 31 and the second transition component 51, thus helping to reduce the space occupied and improve the space utilization rate. In this embodiment, preferably, as follows: Figures 1 to 3 , Figure 11 and Figure 12As shown, the first liquid cooling plate 2 has installation spaces 12 on both sides along the third preset direction c, indicating that the first liquid cooling plate 2 can simultaneously cool the battery cells 8 on both sides. This improves the cooling effect while reducing the number of liquid cooling plates, thus increasing space utilization and reducing weight. It should be noted that, not only that, but also that the first liquid cooling plate 2 has installation spaces 12 on only one side along the third preset direction c, depending on actual needs.

[0073] In this embodiment, preferably, as follows: Figures 1 to 3 , Figure 11 and Figure 12 As shown, the second liquid cooling plate 6 has installation spaces 12 on both sides along the third preset direction c, indicating that the second liquid cooling plate 6 can simultaneously cool the battery cells 8 on both sides. This improves the cooling effect while reducing the number of liquid cooling plates, thus increasing space utilization and reducing weight. It should be noted that, not only that, but also, along the third preset direction c, the second liquid cooling plate 6 may have installation spaces 12 on only one side, depending on actual needs. As described above, this application includes a first liquid cooling plate 2, a second liquid cooling plate 6, and a third liquid cooling plate 4, forming four installation spaces 12. These four installation spaces 12 are arranged in a square array along a first preset direction a and a third preset direction c, forming a grid-like space. Each installation space 12 can accommodate a battery cell 8, improving space utilization and energy density. Furthermore, the first liquid cooling plate 2 cools the battery cells 8 in the two adjacent installation spaces 12 on its left and right sides, the second liquid cooling plate 6 cools the battery cells 8 in the two adjacent installation spaces 12 on its left and right sides, and the third liquid cooling plate 4 cools the battery cells 8 in all four installation spaces 12 simultaneously. Therefore, the battery cells 8 in all four installation spaces 12 are effectively cooled. In addition, it should be noted that each installation space 12 can accommodate not only one row of battery cells 8, but also multiple battery cells 8, with multiple rows of battery cells 8 arranged sequentially along the first preset direction a.

[0074] It should be noted that each third liquid cooling plate 4 is not limited to having one first liquid cooling plate 2 and one second liquid cooling plate 6, but may also have multiple first liquid cooling plates 2 and / or multiple second liquid cooling plates 6. That is, one third liquid cooling plate 4 may be equipped with multiple first liquid cooling plates 2 and / or multiple second liquid cooling plates 6. When there are multiple first liquid cooling plates 2, the multiple first liquid cooling plates 2 are arranged sequentially at intervals along the third preset direction c to form an installation space 12 arranged sequentially at intervals along the third preset direction c for installing the battery cell 8. Each first liquid cooling plate 2 is connected to the liquid inlet pipe 1. Each of the first liquid cooling plates 2 is equipped with the aforementioned first adapter component 31 and sealing ring. Each first liquid cooling plate 2 is connected to the third liquid cooling plate 4 through a corresponding adapter component. When there are multiple second liquid cooling plates 6, the multiple second liquid cooling plates 6 are arranged sequentially at intervals along the third preset direction c to form an installation space 12 arranged sequentially at intervals along the third preset direction c for installing the battery cells 8. Each second liquid cooling plate 6 is connected to the liquid outlet pipe 7. Each second liquid cooling plate 6 is equipped with the aforementioned second adapter component 51 and sealing ring. Each second liquid cooling plate 6 is connected to the third liquid cooling plate 4 through a corresponding adapter component. In this case, more than two layers of battery cells 8 can be installed, and each layer of battery cells 8 can be effectively cooled.

[0075] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, a waist-shaped hole 11 is formed on the side of the first liquid cooling plate 2 and the second liquid cooling plate 6 that is opposite to each other along the first preset direction a, and the waist-shaped hole 11 extends along the first preset direction a. Correspondingly, a plurality of battery cells 8 that are stacked together in sequence along the second preset direction b are provided with side plates, and threaded holes are formed on the side plates, so that fastening components such as screws or bolts can be installed in the waist-shaped hole 11 and the threaded holes. Moreover, the waist-shaped hole 11 can also be selected with a locking position according to actual needs to correspond to battery cells 8 of different lengths.

[0076] It should be noted that in this embodiment, the number of third liquid cooling plates 4 is one. Of course, it is not limited to this. The number of third liquid cooling plates 4 can also be multiple. For example, the number of third liquid cooling plates 4 can also be two. When the number of third liquid cooling plates 4 is two, they are arranged sequentially along the aforementioned third preset direction c. Along the third preset direction c, one of the third liquid cooling plates 4 is arranged on one side of the first liquid cooling plate 2 and the second liquid cooling plate 6, and the other third liquid cooling plate 4 is arranged on the opposite side of the first liquid cooling plate 2 and the second liquid cooling plate 6. The two third liquid cooling plates 4 are symmetrically arranged with respect to the first liquid cooling plate 2 and the second liquid cooling plate 6. The first liquid cooling plate 2 is connected to one of the third liquid cooling plates 4, and the second liquid cooling plate 6 is connected to the other third liquid cooling plate 4. The two third liquid cooling plates 4 are also connected.

[0077] Example 2 See Figures 11 to 13 As shown, Embodiment 2 of this application also provides a battery pack, including the battery pack liquid cooling plate assembly described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the battery pack liquid cooling plate assembly. The same technical features and beneficial effects will not be repeated here.

[0078] In this embodiment, preferably, as follows: Figures 1 to 13 As shown, the battery pack also includes battery cells 8. Multiple battery cells 8 are installed in the mounting space 12 formed by the first liquid cooling plate 2, the second liquid cooling plate 6 and the third liquid cooling plate 4 in the battery pack liquid cooling plate assembly. They are stacked together in sequence along the second preset direction b. As can be seen from the structure described above, the battery pack provided in this application is provided with a first liquid cooling plate 2, a second liquid cooling plate 6, and a third liquid cooling plate 4. The first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4 surround multiple installation spaces 12. The battery cells 8 in each installation space 12 can be cooled by the first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4, which greatly improves the cooling effect. Moreover, the first liquid cooling plate 2, the second liquid cooling plate 6, and the third liquid cooling plate 4 respectively abut against the bottom, top, and side of each row of battery cells 8, which greatly saves space and improves space utilization. Furthermore, the transverse liquid cooling plates on both sides of the third liquid cooling plate 4 are assembled and connected with the third liquid cooling plate 4 to form a complete flow path. This can reduce the number of parts, reduce the space occupied, improve space utilization, and also reduce weight.

[0079] In this embodiment, preferably, the first liquid cooling plate 2 and the adjacent battery cell 8 are bonded together with thermally conductive structural adhesive, which serves to fix the first liquid cooling plate 2. Moreover, the bonding operation is simple. In addition, the thermally conductive structural adhesive can also play a role in rapid heat conduction. In this embodiment, preferably, the second liquid cooling plate 6 is bonded to the adjacent battery cell 8 with thermally conductive structural adhesive, which serves to fix the second liquid cooling plate 6. Moreover, the bonding operation is simple. In addition, the thermally conductive structural adhesive can also play a role in rapid heat conduction. In this embodiment, preferably, the third liquid cooling plate 4 is bonded to the adjacent battery cell 8 with thermally conductive structural adhesive, which serves to fix the third liquid cooling plate 4. Moreover, the bonding operation is simple. In addition, the thermally conductive structural adhesive can also play a role in rapid heat conduction. In addition, it should be noted that the two battery modules, the first liquid cooling plate 2, the second liquid cooling plate 6 and the third liquid cooling plate 4 are assembled together as a whole structure. Multiple such structures can be set in a battery pack, depending on the actual needs. Furthermore, the number of battery modules, the number of first liquid cooling plates 2 and second liquid cooling plates 6 in each whole structure can be found in Embodiment 1, and will not be detailed here.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack liquid cooling plate assembly, characterized in that, include: The system includes an inlet pipe, a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate, and an outlet pipe; wherein, along a first preset direction, the first liquid cooling plate and the second liquid cooling plate are respectively disposed on both sides of the third liquid cooling plate, forming multiple installation spaces, and the installation spaces are used to install battery cells; the inlet pipe is connected to the first liquid cooling plate. The liquid outlet pipe is connected to the second liquid cooling plate; the third liquid cooling plate is connected to the first liquid cooling plate and the second liquid cooling plate respectively, so that the cooling liquid enters through the liquid inlet pipe, flows through the first liquid cooling plate, the third liquid cooling plate and the second liquid cooling plate in sequence, and finally flows out through the liquid outlet pipe.

2. The battery pack liquid cooling plate assembly according to claim 1, characterized in that, The battery pack liquid cooling plate assembly further includes a first adapter assembly, and the first adapter assembly includes a first adapter member and a first sealing ring; wherein, the first adapter member forms a first flow guiding cavity, the liquid inlet of the first flow guiding cavity is connected to the liquid outlet of the first liquid cooling plate, and the liquid outlet of the first flow guiding cavity is connected to the liquid inlet of the third liquid cooling plate. At least one of the liquid outlet of the first liquid cooling plate and the liquid inlet of the third liquid cooling plate is provided in a protruding state and inserted into the first flow guide cavity, and a first sealing ring in a compressed state is provided between the first flow guide cavity and the inner wall of the first flow guide cavity.

3. The battery pack liquid cooling plate assembly according to claim 2, characterized in that, The inlet of the first flow guide cavity of the first adapter component is connected to the outlet of the first liquid cooling plate by welding; and / or One of the liquid inlet of the first flow guiding cavity of the first adapter component and the liquid outlet of the first liquid cooling plate is provided in a protruding state; and / or The inlet of the first flow guiding cavity of the first adapter component is positioned opposite to the outlet of the first liquid cooling plate; and / or The liquid outlet of the first flow guiding cavity of the first transition component is positioned opposite to the liquid inlet of the third liquid cooling plate; and / or The first adapter component is disposed within the corresponding installation space, and along the second preset direction, the end of the first adapter component closer to the installation space is disposed; and / or The liquid outlet of the first liquid cooling plate and the liquid inlet of the third liquid cooling plate are located in the same installation space and are arranged close to each other.

4. The battery pack liquid cooling plate assembly according to claim 2, characterized in that, The battery pack liquid cooling plate assembly further includes a second adapter assembly, and the second adapter assembly includes a second adapter member and a second sealing ring; wherein, the second adapter member forms a second flow guiding cavity, the liquid inlet of the second flow guiding cavity is connected to the liquid outlet of the third liquid cooling plate, and the liquid outlet of the second flow guiding cavity is connected to the liquid inlet of the second liquid cooling plate. At least one of the liquid inlet of the second liquid cooling plate and the liquid outlet of the third liquid cooling plate is provided in a protruding state and inserted into the second flow guide cavity, and a second sealing ring in a compressed state is provided between the second flow guide cavity and the inner wall of the second flow guide cavity.

5. The battery pack liquid cooling plate assembly according to claim 4, characterized in that, The outlet of the second flow guide cavity of the second adapter component is connected to the inlet of the second liquid cooling plate by welding; and / or One of the liquid outlet of the second flow guide cavity of the second adapter component and the liquid inlet of the second liquid cooling plate is configured to be in a protruding state; and / or The inlet of the second flow guiding cavity of the second transition component is positioned opposite to the outlet of the third liquid cooling plate; and / or The outlet of the second flow guiding cavity of the second transition component is positioned opposite to the inlet of the second liquid cooling plate; and / or The second adapter component is disposed within the corresponding installation space, and along a second preset direction, the end of the second adapter component closer to the installation space is disposed; and / or The liquid inlet of the second liquid cooling plate and the liquid outlet of the third liquid cooling plate are located in the same installation space and are arranged close to each other.

6. The battery pack liquid cooling plate assembly according to claim 1, characterized in that, Along the third preset direction, a portion of the third liquid cooling plate forms an inlet channel, and another portion of the third liquid cooling plate forms an outlet channel. The inlet channel and the outlet channel are connected through a connecting channel within the third liquid cooling plate to form a U-shaped channel. The inlet of the liquid inlet channel is connected to the outlet of the first liquid cooling plate, and the outlet of the liquid outlet channel is connected to the inlet of the second liquid cooling plate.

7. The battery pack liquid cooling plate assembly according to claim 6, characterized in that, The number of liquid inlet channels is multiple, and they are arranged sequentially at intervals along the third preset direction; and / or The number of liquid outlet channels is multiple, and they are arranged sequentially at intervals along the third preset direction.

8. The battery pack liquid cooling plate assembly according to any one of claims 1 to 7, characterized in that, The first liquid cooling plate forms a U-shaped first liquid cooling channel; and / or The second liquid cooling plate forms a U-shaped second liquid cooling channel; and / or The liquid inlet pipe is located at one end of the first liquid cooling plate along a second preset direction; and / or The liquid outlet pipe is located at one end of the second liquid cooling plate along a second preset direction; and / or The first liquid cooling plate and the second liquid cooling plate are respectively disposed on opposite sides adjacent to the third liquid cooling plate; and / or The first liquid cooling plate has mounting spaces on both sides along the third preset direction; and / or The second liquid cooling plate has mounting spaces on both sides along the third preset direction; and / or The first liquid cooling plate is perpendicular to the third liquid cooling plate; and / or The second liquid cooling plate is arranged perpendicularly to the third liquid cooling plate; and / or The first liquid cooling plate and the second liquid cooling plate are both arranged parallel to a first preset direction, and the third liquid cooling plate is arranged parallel to a third preset direction; and / or The first liquid cooling plate and the second liquid cooling plate are located on the same straight line; and / or The first liquid cooling plate and the second liquid cooling plate have waist-shaped holes formed on the side opposite to each other along the first preset direction, and the waist-shaped holes extend along the first preset direction; and / or The number of third liquid cooling plates is two, and they are arranged sequentially along a third preset direction. Along the third preset direction, one of the third liquid cooling plates is located on one side of the first liquid cooling plate and the second liquid cooling plate, and the other third liquid cooling plate is located on the opposite side of the first liquid cooling plate and the second liquid cooling plate. The two third liquid cooling plates are symmetrically arranged with respect to the first liquid cooling plate and the second liquid cooling plate. The first liquid cooling plate is connected to one of the third liquid cooling plates, the second liquid cooling plate is connected to the other third liquid cooling plate, and the two third liquid cooling plates are connected together.

9. A battery pack, characterized in that, The battery pack includes battery cells and a battery pack liquid cooling plate assembly as described in any one of claims 1 to 8; wherein, a plurality of battery cells are installed in the mounting space formed by the first liquid cooling plate, the second liquid cooling plate and the third liquid cooling plate in the battery pack liquid cooling plate assembly, and are stacked sequentially along a second preset direction.

10. The battery pack according to claim 9, characterized in that, The first liquid cooling plate is bonded to the adjacent battery cell using thermally conductive structural adhesive; and / or The second liquid cooling plate is bonded to the adjacent battery cell using thermally conductive structural adhesive; and / or The third liquid cooling plate is bonded to the adjacent battery cell using thermally conductive structural adhesive.

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