Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and belongs to the technical field of batteries, a liquid cooling plate in the battery pack is internally provided with a first flow channel, one end of the liquid cooling plate is provided with a liquid inlet end and a liquid outlet end, a first plate body and a second plate body are arranged, the first plate body is internally provided with a second flow channel, and the first plate body is connected with the liquid cooling plate; a first flow channel is arranged in the first plate body to communicate the second flow channel with the liquid inlet end, a third flow channel is arranged in the second plate body, the second plate body is connected with the liquid cooling plate to communicate the third flow channel with the liquid outlet end, the first plate body and the second plate body are adopted to replace a liquid inlet pipe and a liquid outlet pipe in an existing liquid cooling plate, and the cross section, intersecting with the first direction, of the first plate body is square. And the cross section of the second plate body, which intersects with the first direction, is square to form a flat structure design, so that the space ratio in the second direction is reduced, and the space utilization rate in the battery pack along the second direction is improved, thereby further improving the space utilization rate in the battery pack along the second direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a power utilization device. BACKGROUND

[0002] In the existing battery pack, in order to improve the space utilization rate inside the box, a current collector is arranged at the same end of multiple liquid cooling plates, the liquid inlet end and the liquid outlet end are arranged on the current collector, the liquid inlet ends of the multiple liquid cooling plates are connected through a liquid inlet pipe, and the liquid outlet ends of the multiple liquid cooling plates are connected through a liquid outlet pipe, so that the centralized liquid supply and liquid outlet of the multiple liquid cooling plates are realized. The structural design of the current collector, the liquid inlet pipe and the liquid outlet pipe occupies a large space inside the box along the length direction of the liquid cooling plate, which affects the space utilization rate of the battery pack. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a battery pack and a power utilization device to solve the problem of large space occupied by the liquid cooling plate liquid inlet and liquid outlet structural design in the existing battery pack.

[0004] The first aspect of the embodiment of the present application provides a battery pack with a first direction, a second direction and a third direction intersecting with each other, the battery pack comprising: a liquid cooling plate extending along the second direction, and internally provided with a first flow channel for the flow of a heat-conducting fluid, the liquid cooling plate being provided at one end along the second direction with a liquid inlet end and a liquid outlet end respectively communicating with the first flow channel; a first plate body extending along the first direction, the cross section of the first plate body intersecting with the first direction being square, the first plate body being internally provided with a second flow channel, the first plate body being connected with the liquid cooling plate, and the second flow channel being in communication with the liquid inlet end; a second plate body extending along the first direction, the cross section of the second plate body intersecting with the first direction being square, the second plate body being internally provided with a third flow channel, the second plate body being connected with the liquid cooling plate, and the third flow channel being in communication with the liquid outlet end; and the first plate body and the second plate body being arranged along the third direction.

[0005] Optionally, the first plate body has a size L1 mm along the first direction, a size W1 mm along the second direction and a size H1 mm along the third direction, and satisfies W1 < L1 and W1 < H1; and / or, the second plate body has a size L2 mm along the first direction, a size W2 mm along the second direction and a size H2 mm along the third direction, and satisfies W2 < L2 and W2 < H2.

[0006] Optionally, along the second direction, part of the first plate body protrudes in the direction close to the liquid cooling plate to form a first protruding portion, and / or part of the second plate body protrudes in the direction close to the liquid cooling plate to form a second protruding portion.

[0007] Optionally, the first protruding portion defines a first cavity inside, and the second protruding portion defines a second cavity inside; the first protruding portion and the second protruding portion are arranged along the third direction, and the first cavity and the second cavity are communicated along the third direction.

[0008] Optionally, the liquid cooling plate comprises a first segment, a second segment and a third segment, the first segment and the second segment are arranged apart along the first direction; along the second direction, the same end of the first segment and the second segment is connected by the third segment, the liquid inlet end is arranged at one end of the first segment away from the third segment, and the liquid outlet end is arranged at one end of the second segment away from the third segment; the first plate body is connected with the first segment to communicate the second flow channel with the liquid inlet end; and the second plate body is connected with the second segment to communicate the third flow channel with the liquid outlet end.

[0009] Optionally, the battery pack further comprises an end plate arranged on the same side of the first plate body and the second plate body along the first direction, the end plate is internally provided with a liquid supply flow channel and a liquid return flow channel arranged apart along the third direction; the end plate is connected with the first plate body, the liquid supply flow channel is communicated with the second flow channel, the end plate is connected with the second plate body, and the liquid return flow channel is communicated with the third flow channel; the end plate is connected with the liquid cooling plate, the liquid supply flow channel is communicated with the liquid inlet end, and the liquid return flow channel is communicated with the liquid outlet end.

[0010] Optionally, the end plate comprises a liquid supply end plate and a liquid return end plate arranged apart along the third direction, the liquid supply flow channel is arranged inside the liquid supply end plate, and the liquid return flow channel is arranged inside the liquid return end plate; the liquid supply end plate is connected with the first plate body to communicate the liquid supply flow channel with the second flow channel, and the liquid supply end plate is connected with the liquid cooling plate to communicate the liquid supply flow channel with the liquid inlet end; the liquid return end plate is connected with the second plate body to communicate the liquid return flow channel with the third flow channel, and the liquid return end plate is connected with the liquid cooling plate to communicate the liquid return flow channel with the liquid outlet end; the liquid supply end plate has a dimension L3 mm along the first direction, a dimension W3 mm along the second direction, and a dimension H3 mm along the third direction, and satisfies W3 < L3 and W3 < H3.

[0011] And / or, the liquid return end plate has a dimension L4 mm along the first direction, a dimension W4 mm along the second direction, and a dimension H4 mm along the third direction, and satisfies W4 < L4 and W4 < H4.

[0012] Optionally, the battery pack further comprises a busbar, the busbar is internally provided with a first channel and a second channel arranged at intervals along the third direction; the number of the first plate bodies is plural, the first plate bodies are arranged at intervals along the first direction, two adjacent first plate bodies are connected by a busbar, the second flow channel communicates with the first channel; the number of the second plate bodies is plural, the second plate bodies are arranged at intervals along the first direction, two adjacent second plate bodies are connected by a busbar, the third flow channel communicates with the second channel; the busbar is connected with the liquid cooling plate, the first channel communicates with the liquid inlet end, and the second channel communicates with the liquid outlet end.

[0013] Optionally, the busbar comprises a first busbar and a second busbar arranged along the third direction, the first channel is arranged inside the first busbar, and the second channel is arranged inside the second busbar; the first busbar is connected with the first plate body to communicate the first channel with the second flow channel, and the first busbar is connected with the liquid cooling plate to communicate the first channel with the liquid inlet end; the second busbar is connected with the second plate body to communicate the second channel with the third flow channel, and the second busbar is connected with the liquid cooling plate to communicate the second channel with the liquid outlet end; the first busbar has a size L5 mm along the first direction, a size W5 mm along the second direction, and a size H5 mm along the third direction, and satisfies W5 < L5 and W5 < H5; and / or, the second busbar has a size L6 mm along the first direction, a size W6 mm along the second direction, and a size H6 mm along the third direction, and satisfies W6 < L6 and W6 < H6.

[0014] The second aspect of the embodiments of the present application provides a power utilization device comprising the battery pack as described above.

[0015] In summary, embodiments of the present application provide a battery pack and an electrical device having the same. A liquid cooling plate within the battery pack is provided with a first flow channel for flowing a heat transfer fluid. One end of the liquid cooling plate along a second direction is provided with a liquid inlet and a liquid outlet, each of which is connected to the first flow channel. A first plate and a second plate are provided. A second flow channel is provided within the first plate, connecting the first plate to the liquid cooling plate to connect the second flow channel to the liquid inlet. A third flow channel is provided within the second plate, connecting the second plate to the liquid cooling plate to connect the third flow channel to the liquid outlet. Heat transfer fluid is supplied to the liquid cooling plate through the first plate, and the heat transfer fluid is discharged from the liquid cooling plate through the second plate. The first and second plates are used to replace the liquid inlet and outlet pipes in existing liquid cooling systems. Furthermore, the first plate has a square cross-section intersecting the first direction, and the second plate has a square cross-section intersecting the first direction, forming a flattened structural design. This reduces the space occupied in the second direction, improves the space utilization within the battery pack along the second direction, and further improves the space utilization within the battery pack along the second direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0018] Figure 2 This is a schematic structural diagram of the battery pack provided in an embodiment of the present application with the box removed;

[0019] Figure 3 This is a schematic structural diagram of the battery pack provided in an embodiment of the present application with the box and battery cells removed;

[0020] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at point A;

[0021] Figure 5 yes Figure 3 A schematic diagram of the enlarged structure at point B;

[0022] Figure 6 yes Figure 3 Schematic diagram of the enlarged structure at C;

[0023] Figure 7 Schematic diagram of the structure of the liquid cooling plate in the battery pack provided in the embodiment of the present application;

[0024] Figure 81 is a schematic diagram of a first angle of view of a combination of a first plate, a second plate, a liquid supply end plate, a liquid return end plate, a first manifold plate, and a second manifold plate in a battery pack provided in an embodiment of the present application;

[0025] Figure 9 is a schematic diagram of a second angle of view of the combination of the first plate, the second plate, the liquid supply end plate, the liquid return end plate, the first manifold plate, and the second manifold plate in the battery pack provided in an embodiment of the present application;

[0026] Figure 10 is a schematic structural diagram of the first plate in the battery pack provided in an embodiment of the present application;

[0027] Figure 11 Schematic diagram of the structure of the second plate in the battery pack provided in an embodiment of the present application;

[0028] Figure 12 This is a schematic structural diagram of a liquid supply end plate in a battery pack provided in an embodiment of the present application from a first angle;

[0029] Figure 13 This is a schematic structural diagram of a second angle of view of a liquid supply end plate in a battery pack provided in an embodiment of the present application;

[0030] Figure 14 This is a schematic structural diagram of a first angle of a liquid return end plate in a battery pack provided in an embodiment of the present application;

[0031] Figure 15 2 is a schematic structural diagram of a second angle of the liquid return end plate in the battery pack provided in an embodiment of the present application;

[0032] Figure 16 This is a schematic structural diagram of a first angle of view of a first busbar in a battery pack provided in an embodiment of the present application;

[0033] Figure 17 yes Figure 16 A schematic structural diagram of a second angle of the first busbar shown;

[0034] Figure 18 This is a schematic structural diagram of a first angle of view of a second busbar in a battery pack provided in an embodiment of the present application;

[0035] Figure 19 yes Figure 18 A schematic structural diagram of a second busbar at a second angle is shown.

[0036] Description of main reference numerals:

[0037] 1. Battery pack;

[0038] 10. Liquid cooling plate, 101. First flow channel, 102. Liquid inlet end, 103. Liquid outlet end, 11. First section, 12. Second section, 13. Third section, 110. First liquid cooling plate, 120. Second liquid cooling plate, 130. Third liquid cooling plate;

[0039] 20. First plate body, 200. First plate group, 201. Second flow channel, 21. First protruding part, 210. First cavity, 202. First end face;

[0040] 30. Second plate body, 300. Second plate group, 301. Third flow channel, 31. Second protruding part, 310. Second cavity, 302. Second end face;

[0041] 40. End plate, 41. Liquid supply end plate, 410. Liquid supply flow channel, 411. Liquid supply connector, 412. First body, 413. First connecting part, 414. First through hole, 415. First recess, 4151. First groove bottom, 416. Liquid supply pipe, 42. Liquid return end plate, 420. Liquid return flow channel, 421. Liquid return connector, 422. Second body, 423. Second connecting part, 424. Second through hole, 425. Second recess, 4251. Second groove bottom, 426. Liquid return pipe;

[0042] 50. Converging plate, 51. First converging plate, 510. First channel, 511. Third body, 512. Third connecting part, 513. Third through hole, 514. Third recess, 5141. Third groove bottom, 52. Second converging plate, 520. Second channel, 521. Fourth body, 522. Fourth connecting part, 523. Fourth through hole, 524. Fourth recess, 5241. Fourth groove bottom;

[0043] 60. Battery cell;

[0044] 70. Box body, 701. Containing cavity, 71. Side wall, 711. Opening, 72. Tray;

[0045] X. First direction, Y. Second direction, Z. Third direction. DETAILED DESCRIPTION

[0046] In order to make the purposes, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described in the present specification are only for the purpose of explaining the present application, and are not intended to limit the present application.

[0047] In the description of the application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0048] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0050] In the embodiments of the application, "parallel" means that the angle formed by straight lines, straight lines and surfaces, or surfaces is -1°-1°. In addition, "perpendicular" means that the angle formed by straight lines, straight lines and surfaces, or surfaces is 89°-91°. Equal distance or equal angle means that the tolerance range is -1%-1%.

[0051] The present embodiment provides an electrical device including a battery pack 1, which serves as a power source for the electrical device. The electrical device may be, but is not limited to, a mobile device (e.g., a mobile phone, a laptop computer, etc.), an electric vehicle (e.g., a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an electric bicycle, an electric scooter, an electric golf cart, an electric truck, etc.), an electric train, a ship, a satellite, an energy storage system, etc.

[0052] In some embodiments of the present application, a battery pack 1 is provided, referring to Figures 1-11 The battery pack 1 includes: a liquid cooling plate 10, a first plate body 20 and a second plate body 30. The battery pack 1 has a first direction X, a second direction Y and a third direction Z that intersect each other. Figures 1-19 In the illustrated embodiment, the first direction X, the second direction Y, and the third direction Z are orthogonal to each other.

[0053] Reference Figures 1-7 The liquid cooling plate 10 extends along the second direction Y. A first flow channel 101 for the flow of a heat transfer fluid is provided within the liquid cooling plate 10. A liquid inlet 102 and a liquid outlet 103 are provided at one end of the liquid cooling plate 10 along the second direction Y, each of which is in communication with the first flow channel 101. There are multiple liquid cooling plates 10, each spaced apart along the first direction X. Battery cells 60 are provided on two adjacent liquid cooling plates along the first direction X. The battery cells 60 abut against the liquid cooling plates 10 along the first direction X. The liquid inlet end 102 and the liquid outlet end 103 are arranged at the same end of the liquid cooling plate 10 along the second direction Y, and the liquid inlet end 102 and the liquid outlet end 103 are arranged at intervals along the third direction Z. The first flow channel 101 includes a liquid inlet flow channel and a liquid outlet flow channel arranged at intervals along the third direction Z. The liquid inlet flow channel and the liquid outlet flow channel extend along the second direction Y respectively. One end of the liquid inlet flow channel along the second direction Y is connected to the liquid inlet end 102, and the other end is connected to the liquid outlet flow channel on the inner side of the liquid cooling plate 10. One end of the liquid outlet flow channel along the second direction Y is connected to the liquid outlet end 103, and the other end is connected to the liquid inlet flow channel on the inner side of the first liquid cooling plate 10. The heat transfer fluid enters the liquid inlet flow channel through the liquid inlet end 102, and then discharges the liquid cooling plate 10 through the liquid outlet flow channel and the liquid outlet end 103, thereby circulating the heat transfer fluid in the first flow channel 101 to control the temperature of the battery cell 60.

[0054] Reference Figures 1-6 as well as Figures 8-10 The first plate 20 extends along the first direction X, and the cross section of the first plate 20 intersecting the first direction X is square. Figures 1-6 as well as Figures 8-10In the embodiment shown, the cross section of the first plate 20 perpendicular to the first direction X is rectangular. In other implementations, the cross section of the first plate 20 perpendicular to the first direction X may also be square or rhombus-shaped, which can be selected according to actual use requirements. A second flow channel 201 is provided inside the first plate 20. The first plate 20 is connected to the liquid cooling plate 10, and the second flow channel 201 is connected to the liquid inlet end 102. The liquid inlet ends 102 of two adjacent liquid cooling plates 10 along the first direction X are connected through the second flow channel 201 in the first plate 20. Figure 10 The first plate body 20 has two first end surfaces 202 arranged opposite to each other along the first direction X. The cross section of the first plate body 20 perpendicular to the first direction X is a cross section parallel to the first end surface 202 .

[0055] Reference Figures 1-6 、 Figures 8-9 as well as Figure 11 The second plate 30 extends along the first direction X, and the cross section of the second plate 30 intersecting the first direction X is square. Figures 1-6 as well as Figures 8-9 as well as Figure 11 In the embodiment shown, the cross section of the second plate 30 perpendicular to the first direction X is rectangular. In some other implementations, the cross section of the second plate 30 perpendicular to the first direction X may also be square or rhombus, which can be selected according to actual use requirements. A third flow channel 301 is provided inside the second plate 30. The second plate 30 is connected to the liquid cooling plate 10, and the third flow channel 301 is connected to the liquid outlet 103. The liquid outlets 103 of two adjacent liquid cooling plates 10 along the first direction X are connected through the third flow channel 301 in the second plate 30. Figure 11 The second plate body 30 has two second end surfaces 302 arranged opposite to each other along the first direction X. The cross section of the second plate body 30 perpendicular to the first direction X is a cross section parallel to the second end surface 302 .

[0056] The first plate 20 and the second plate 30 are arranged along the third direction Z. Specifically, in some implementations, the first plate 20 and the second plate 30 may be spaced apart along the third direction Z. In some implementations, the first plate 20 and the second plate 30 may be stacked along the third direction Z.

[0057] In existing battery packs, in order to improve the space utilization inside the box, a current collector is usually set at the same end of multiple liquid cooling plates, and a liquid inlet end and a liquid outlet end are integrated on the current collector. The liquid inlets of multiple liquid cooling plates are connected through a liquid inlet pipe, and the liquid outlet ends of multiple liquid cooling plates are connected through a liquid outlet pipe to achieve centralized liquid supply and discharge of multiple liquid cooling plates. Usually, the liquid inlet pipe and the liquid outlet pipe are arranged along the height direction of the box, and the liquid cooling plate and the current collector are connected along the length direction of the box. The combined design of the current collector, the liquid inlet pipe and the liquid outlet pipe occupies more space in the length direction of the box, affecting the space utilization of the battery pack.

[0058] The battery pack 1 provided in the embodiment of the present application is provided with a liquid cooling plate 10 extending along the second direction Y in the battery pack 1, a first flow channel 101 for the flow of a heat-conducting fluid is provided inside the liquid cooling plate 10, and one end of the liquid cooling plate 10 along the second direction Y is provided with a liquid inlet end 102 and a liquid outlet end 103 respectively connected to the first flow channel 101, and a first plate body 20 and a second plate body 30 are provided, the first plate body 20 extends along the first direction X, and a second flow channel 201 for the flow of a heat-conducting fluid is provided inside the first plate body 20, the first plate body 20 is connected to the liquid cooling plate 10, and the second plate body 30 is provided. The second flow channel 201 is connected to the liquid inlet end 102, the second plate body 30 extends along the first direction X, and a third flow channel 301 for the flow of heat transfer fluid is provided inside the second plate body 30. The second plate body 30 is connected to the liquid cooling plate 10, and the third flow channel 301 is connected to the liquid outlet end 103. The first plate body 20 and the second plate body 30 are arranged along the third direction Z, and the liquid inlet end 102 and the liquid outlet end 103 are arranged at the same end of the liquid cooling plate 10 along the second direction Y, so that the first plate body 20 and the second plate body 30 are arranged on the same side of the liquid cooling plate 10 along the second direction Y, and the third flow channel 301 is connected to the liquid cooling plate 10 along the second direction Y. A plate body 20 is connected to the liquid cooling plate 10, and a second plate body 30 is connected to the liquid cooling plate 10, so that a heat transfer fluid is provided to the liquid cooling plate 10 through the first plate body 20, and the heat transfer fluid in the liquid cooling plate 10 is discharged through the second plate body 30. In addition, the cross section of the first plate body 20 intersecting the first direction X is square, and the cross section of the second plate body 30 intersecting the first direction X is square, so that the first plate body 20 and the second plate body 30 form a flat structure in the battery pack 1, thereby reducing the space occupied in the second direction Y and improving the space utilization of the battery pack 1 in the second direction Y. The utilization rate is high, and the design of arranging the first plate body 20 and the second plate body 30 along the third direction Z makes the first plate body 20 and the second plate body 30 independent of each other, and the first plate body 20 and the second plate body 30 do not interfere with each other or interfere with each other very little. When the battery pack 1 shakes and causes the liquid cooling plate 10 to shake, the connection stability between the second flow channel 201 in the first plate body 20 and the liquid inlet end 102 can be guaranteed, and the connection stability between the third flow channel 301 in the second plate body 30 and the liquid outlet end 103 can be guaranteed, thereby ensuring the stability and safety of the battery pack 1.

[0059] In some embodiments, reference Figures 1-7The liquid cooling plate 10 includes a first section 11, a second section 12, and a third section 13. The first section 11 and the second section 12 are spaced apart along the first direction X. The first section 11 and the second section 12 are connected at the same end along the second direction Y by the third section 13, forming a U-shaped structure of the liquid cooling plate 10. The liquid inlet end 102 is provided at the end of the first section 11 away from the third section 13 along the second direction Y, and the liquid outlet end 103 is provided at the end of the second section 12 away from the third section 13 along the second direction Y. Liquid inlet channels and liquid outlet channels are respectively provided inside the first section 11 and the second section 12. The liquid inlet channel in the first section 11 is connected to the liquid inlet channel in the second section 12 in the third section 13, and the liquid outlet channel in the first section 11 is connected to the liquid outlet channel in the second section 12 in the third section 13. The first plate 20 is connected to the first section 11 to connect the second flow channel 201 with the liquid inlet 102. The second plate 30 is connected to the second section 12 to connect the third flow channel 301 with the liquid outlet 103. The U-shaped structure of the liquid cooling plate 10 improves the ease of assembly between the first and second plates 20, 30, and the liquid cooling plate 10. The first and second sections 11, 12 are spaced apart along the first direction X, allowing the first and second plates 20, 30 to be staggered along the first direction X. This ensures the stability of the connection between the first plate 20 and the first section 11, the connection between the second plate 30 and the second section 12, and the stability of the battery pack 1 during use.

[0060] In some embodiments, reference Figure 10 The first plate 20 has a dimension L1 mm along the first direction X, that is, the distance between the two surfaces of the first plate 20 arranged opposite to each other along the first direction X is L1 mm, that is, the distance between the two first end surfaces 202 is L1 mm. In other words, the length of the first plate 20 is L1 mm. The first plate 20 also has a dimension W1 mm ​​along the second direction Y, that is, the distance between the two surfaces of the first plate 20 arranged opposite to each other along the second direction Y is W1 mm. In other words, the thickness of the first plate 20 is W1 mm. The first plate 20 also has a dimension H1 mm along the third direction Z, that is, the distance between the two surfaces of the first plate 20 arranged opposite to each other along the third direction Z is H1 mm. In other words, the height of the first plate 20 is H1 mm, satisfying: W1<L1, W1

[0061] In some embodiments, reference Figure 10 ​, H1

[0062] In some embodiments, referring to Figure 11 , the second plate body 30 has a dimension L2 mm along the first direction X, i.e., the distance between two surfaces of the second plate body 30 arranged oppositely along the first direction X is L2 mm, i.e., the distance between two second end faces 302 is L2 mm, in other words, the length of the second plate body 30 is L2 mm, the second plate body 30 also has a dimension W2 mm along the second direction Y, i.e., the distance between two surfaces of the second plate body 30 arranged oppositely along the second direction Y is W2 mm, in other words, the thickness of the second plate body 30 is W2 mm, the second plate body 30 also has a dimension H2 mm along the third direction Z, i.e., the distance between two surfaces of the second plate body 30 arranged oppositely along the third direction Z is H2 mm, in other words, the height of the second plate body 30 is H2 mm, and satisfies: W2

[0063] In some embodiments, referring to Figure 11 , H2

[0064] In some embodiments, referring to Figures 2-6 and Figures 8-10 , along the second direction Y, part of the first plate body 20 protrudes in the direction close to the liquid cooling plate 10 to form a first protruding portion 21, the arrangement of the first protruding portion 21 can adjust the length of the first plate body 20 along the first direction X, so that the first plate body 20 can be adapted to the connection between the liquid cooling plates 10 with different distances along the first direction X, and ensure the connection stability between the first plate body 20 and the liquid cooling plate 10, and the structure design of the first protruding portion 21 protruding close to the liquid cooling plate 10 can increase the contact area between the first plate body 20 and the adjacent battery monomer 60, increase the heat exchange area, and improve the temperature control effect on the adjacent battery monomer 60.

[0065] In some embodiments, referring to Figures 2-6 and Figures 8-9 and Figure 11Along the second direction Y, part of the second plate 30 protrudes toward the liquid cooling plate 10 to form a second protrusion 31. The provision of the second protrusion 31 can adjust the length of the second plate 30 along the first direction X, so that the second plate 30 can adapt to the connection between the liquid cooling plates 10 with different spacings along the first direction X, ensuring the connection stability between the second plate 30 and the liquid cooling plate 10. In addition, the structural design of the second protrusion 31 protruding toward the liquid cooling plate 10 can increase the contact area between the second plate 30 and the adjacent battery cells 60, increase the heat exchange area, and improve the temperature control effect of the adjacent battery cells 60.

[0066] In some embodiments, reference Figure 2 The first protrusion 21 defines a first cavity 210 therein, and the second protrusion 31 defines a second cavity 310 therein. The first protrusion 21 and the second protrusion 31 are arranged along the third direction Z, and the first cavity 210 and the second cavity 310 are connected along the third direction Z. As a result, the first protrusion 21 and the second protrusion 31 cooperate with each other to increase the contact area and heat exchange area with the adjacent battery cells 60, thereby improving the temperature control effect of the adjacent battery cells 60 and improving the space utilization along the second direction Y, thereby avoiding the situation where the first protrusion 21 and the second protrusion 31 are spaced apart along the first direction X, resulting in more space being occupied in the second direction Y.

[0067] In some embodiments, reference Figures 2-4 、 Figures 8-9 as well as Figures 12-15 The battery pack 1 also includes an end plate 40, referring to Figures 2-4 as well as Figures 8-9 The end plate 40 is arranged on the same side of the first plate body 20 and the second plate body 30 along the first direction X. A liquid supply channel 410 and a liquid return channel 420 are provided inside the end plate 40 and are arranged at intervals along the third direction Z. The end plate 40 is connected to the first plate body 20, the liquid supply channel 410 is connected to the second channel 201, the end plate 40 is connected to the second plate body 30, the liquid return channel 420 is connected to the third channel 301, the end plate 40 is connected to the liquid cooling plate 10, the liquid supply channel 410 is connected to the liquid inlet end 102, and the liquid return channel 420 is connected to the liquid outlet end 103. The end plate 40 is arranged so that the liquid cooling plate 10, the first plate body 20 and the second plate body 30 are respectively connected to the end plate 40, which can form a centralized liquid supply to the liquid cooling plate 10 and the first plate body 20, and the heat-conducting fluid flowing out of the liquid cooling plate 10 through the liquid outlet 103 and the heat-conducting fluid in the second plate body 30 can be collected in the return liquid channel 420 of the end plate 40 and then discharged, thereby improving the liquid supply and drainage efficiency, and the end plate 40 can also reduce the space occupancy rate in the second direction Y, thereby improving the space utilization rate of the battery pack 1 in the second direction Y.

[0068] In some embodiments, the part of the end plate 40 corresponding to the liquid supply channel 410 is connected to the first section 11 of the liquid cooling plate 10 to communicate the liquid supply channel 410 with the liquid inlet end 102, and the part of the end plate 40 corresponding to the liquid return channel 420 is connected to the second section 12 to communicate the liquid return channel 420 with the liquid outlet end 103.

[0069] In some embodiments, referring to Figures 2-4 , Figures 8-9 and Figures 12-15 , the end plate 40 comprises a liquid supply end plate 41 and a liquid return end plate 42 spaced apart along the third direction Z, referring to Figures 12-13 , the liquid supply channel 410 is arranged inside the liquid supply end plate 41, referring to Figures 14-15 , the liquid return channel 420 is arranged inside the liquid return end plate 42, referring to Figures 2-4 and Figures 8-9 , the liquid supply end plate 41 is connected to the first plate body 20 to communicate the liquid supply channel 410 with the second channel 201, and the liquid supply end plate 41 is connected to the liquid cooling plate 10 to communicate the liquid supply channel 410 with the liquid inlet end 102, specifically, the liquid supply end plate 41 is connected to the first section 11 to communicate the liquid supply channel 410 with the liquid inlet end 102. The liquid return end plate 42 is connected to the second plate body 30 to communicate the liquid return channel 420 along the third channel 301, and the liquid return end plate 42 is connected to the liquid cooling plate 10 to communicate the liquid return channel 420 with the liquid outlet end 103, specifically, the liquid return end plate 42 is connected to the second section 12 to communicate the liquid return channel 420 with the liquid outlet end 103. By dividing the end plate 40 into the liquid supply end plate 41 and the liquid return end plate 42 arranged along the third direction Z and independent of each other, the liquid supply end plate 41 and the liquid return end plate 42 do not interfere with each other or interfere less, and when the battery pack 1 shakes to cause the liquid cooling plate 10 to shake, the connection stability between the liquid supply end plate 41 and the first plate body 20 and the first section 11 can be ensured, and the connection stability between the liquid return end plate 42 and the second plate body 30 and the second section 12 can be ensured, thereby ensuring the use stability and safety of the battery pack 1.

[0070] In some embodiments, referring to Figure 3 , the number of the liquid cooling plates 10 is multiple, and the multiple liquid cooling plates 10 are arranged spaced apart along the first direction X, specifically, the multiple liquid cooling plates 10 comprise a first liquid cooling plate 110 and a second liquid cooling plate 120 arranged spaced apart along the first direction X, and further comprise at least one third liquid cooling plate 130 arranged between the first liquid cooling plate 110 and the second liquid cooling plate 120. The liquid supply end plate 41 is connected to the first section 11 of the first liquid cooling plate 110, and the liquid supply end plate 41 is connected to the first plate body 20 adjacent along the first direction X, the liquid return end plate 42 is connected to the second section 12 of the first liquid cooling plate 110, and the liquid return end plate 42 is connected to the second plate body 30 adjacent along the first direction X.

[0071] In some embodiments, referring toFigure 12 The liquid supply end plate 41 has a dimension L3 mm along the first direction X, i.e., the distance between two surfaces of the liquid supply end plate 41 arranged opposite to each other along the first direction X is L3 mm, in other words, the length of the liquid supply end plate 41 is L3 mm, the liquid supply end plate 41 also has a dimension W3 mm along the second direction Y, i.e., the distance between two surfaces of the liquid supply end plate 41 arranged opposite to each other along the second direction Y is W3 mm, in other words, the thickness of the liquid supply end plate 41 is W3 mm, the liquid supply end plate 41 also has a dimension H3 mm along the third direction Z, i.e., the distance between two surfaces of the liquid supply end plate 41 arranged opposite to each other along the third direction Z is H3 mm, in other words, the height of the liquid supply end plate 41 is H3 mm, and W3 < L3 and W3 < H3 are satisfied, so that the dimension of the liquid supply end plate 41 in the second direction Y is minimized under the premise of ensuring the flow of the heat-conducting fluid in the liquid supply flow channel 410, the flat structure design of the liquid supply end plate 41 is realized, and the space occupancy in the second direction Y is reduced, thereby improving the space utilization of the battery pack 1 in the second direction Y.

[0072] In some embodiments, referring to Figures 8-9 and Figures 12-13 , the liquid supply end plate 41 is provided with a liquid supply pipe 416 on the side thereof facing away from the liquid cooling plate 10 along the second direction Y, the liquid supply pipe 416 is in communication with the liquid supply flow channel 410, referring to Figures 1-4 , the liquid supply end plate 41 is provided with a liquid supply connector 411 on the side thereof facing away from the liquid cooling plate 10 along the second direction Y, the liquid supply connector 411 is sleeved on the liquid supply pipe 416 to facilitate liquid supply to the liquid supply flow channel 410.

[0073] In some embodiments, referring to Figures 8-9 and Figures 12-13 , the liquid supply end plate 41 comprises a first body 412 and a first connecting portion 413, the liquid supply flow channel 410 is arranged inside the first body 412, L3, W3 and H3 are the dimensions of the first body 412, i.e., the cross section of the first body 412 perpendicular to the first direction X is rectangular, the liquid supply end plate 41 is connected to the adjacent first plate body 20 through the first body 412 to connect the liquid supply flow channel 410 and the second flow channel 201, the first connecting portion 413 is arranged on the side of the first body 412 facing the first liquid cooling plate 110 along the second direction Y, the first connecting portion 413 is connected to the first section 11, referring to Figures 12-13 , the first connecting portion 413 is provided with a first through hole 414 penetrating the first connecting portion 413 along the second direction Y, the first through hole 414 is in communication with the liquid supply flow channel 410, and the liquid supply flow channel 410 is in communication with the liquid inlet end 102 on the first liquid cooling plate 110 through the first through hole 414. Referring to Figure 13The first connecting part 413 is provided with a first groove 415 on one side of the first connecting part 413 away from the first body 412 along the second direction Y, the first groove 415 has a first groove bottom 4151, the first section 11 of the first liquid cooling plate 110 is inserted into the first groove 415, the first groove bottom 4151 extends along the third direction Z, and the first through hole 414 penetrates one end of the first groove bottom 4151 along the third direction Z to communicate with the liquid supply channel 410. The provision of the first connecting part 413 can improve the connection stability between the liquid supply end plate 41 and the first section 11 of the first liquid cooling plate 110 in the liquid cooling plate 10, the provision of the first body 412, and the provision that the size W3 of the three sizes L3, W3 and H3 of the first body 412 along the second direction Y is the smallest, thereby reducing the space occupancy of the first body 412 along the second direction Y and improving the space utilization of the battery pack 1 along the second direction Y.

[0074] In some embodiments, with reference to Figure 14 The liquid return end plate 42 has a size L4 mm along the first direction X, that is, the distance between the two surfaces of the liquid return end plate 42 arranged oppositely along the first direction X is L4 mm, in other words, the length of the liquid return end plate 42 is L4 mm, the liquid return end plate 42 also has a size W4 mm along the second direction Y, that is, the distance between the two surfaces of the liquid return end plate 42 arranged oppositely along the second direction Y is W4 mm, in other words, the thickness of the liquid return end plate 42 is W4 mm, the liquid return end plate 42 also has a size H4 mm along the third direction Z, that is, the distance between the two surfaces of the liquid return end plate 42 arranged oppositely along the third direction Z is H4 mm, in other words, the height of the liquid return end plate 42 is H4 mm, and W4 < L4 and W4 < H4 are satisfied, thereby reducing the size of the liquid return end plate 42 along the second direction Y as much as possible under the premise of ensuring the flow of the heat-conducting fluid in the liquid return channel 420, realizing the flat structure design of the liquid return end plate 42, thereby reducing the space occupancy along the second direction Y and improving the space utilization of the battery pack 1 along the second direction Y.

[0075] In some embodiments, with reference to Figure 8 and Figures 14-15 The liquid return end plate 42 is provided with a liquid return pipe 426 on one side of the liquid return end plate 42 away from the liquid cooling plate 10 along the second direction Y, the liquid return pipe 426 communicates with the liquid supply channel 410, with reference to Figures 1-4 The liquid return end plate 42 is provided with a liquid return connector 421 on one side of the liquid return end plate 42 away from the liquid cooling plate 10 along the second direction Y, the liquid return connector 421 is sleeved on the liquid return pipe 426 to facilitate liquid supply to the liquid return channel 420.

[0076] In some embodiments, with reference to Figures 8-9 and Figures 14-15The liquid return end plate 42 comprises a second body 422 and a second connecting portion 423, the liquid return flow channel 420 is arranged inside the second body 422, L4, W4 and H4 are the dimensions of the second body 422, that is, the cross section of the second body 422 perpendicular to the first direction X is rectangular, the liquid return end plate 42 is connected to the adjacent second plate body 30 through the second body 422 to communicate the liquid return flow channel 420 and the third flow channel 301, the second connecting portion 423 is arranged on one side of the second body 422 facing the first liquid cooling plate 110 along the second direction Y, the second connecting portion 423 is connected with the second section 12, for reference Figures 14-15 The second connecting portion 423 is provided with a second through hole 424 penetrating through the second connecting portion 423 along the second direction Y, the second through hole 424 communicates with the liquid return flow channel 420, and the liquid return flow channel 420 communicates with the liquid outlet end 103 on the first liquid cooling plate 110 through the second through hole 424. For reference Figure 15 The second connecting portion 423 is provided with a second groove 425 on the side away from the second body 422 along the second direction Y, the second groove 425 has a second groove bottom 4251, the second section 12 of the first liquid cooling plate 110 is inserted into the second groove 425, the second groove bottom 4251 extends along the third direction Z, and the second through hole 424 penetrates through one end of the second groove bottom 4251 along the third direction Z to communicate with the liquid return flow channel 420. The provision of the second connecting portion 423 can improve the connection stability between the liquid return end plate 42 and the second section 12 of the first liquid cooling plate 110 in the liquid cooling plate 10, the provision of the second body 422, and the provision of the three dimensions L4, W4 and H4 of the second body 422 along the second direction Y, the dimension W4 along the second direction Y is the smallest, thereby reducing the space occupancy of the second body 422 along the second direction Y and improving the space utilization of the battery pack 1 along the second direction Y.

[0077] In some embodiments, for reference Figures 8-9 The first body 412 and the second body 422 are arranged along the third direction Z, and the first body 412 and the second body 422 are arranged along the first direction X, specifically, the first body 412 and the second body 422 are staggered along the first direction X, thereby ensuring the connection stability between the first body 412 and the first section 11, ensuring the connection stability between the second body 422 and the second section 12, and ensuring the use stability of the battery pack 1.

[0078] In some embodiments, for reference Figures 1-6 , Figures 8-9 and Figures 16-19 The battery pack 1 further comprises a bus bar 50, the bus bar 50 is internally provided with a first channel 510 and a second channel 520 arranged along the third direction Z, the first channel 510 and the second channel 520 respectively penetrate through the bus bar 50 along the first direction X, for reference Figures 1-6 and Figures 8-9The number of the first plate bodies 20 is multiple, the multiple first plate bodies 20 are arranged at intervals along the first direction X, two adjacent first plate bodies 20 are connected through a bus bar 50, the second flow channel 201 is communicated with the first channel 510, the number of the second plate bodies 30 is multiple, the multiple second plate bodies 30 are arranged at intervals along the first direction X, two adjacent second plate bodies 30 are connected through a bus bar 50, the third flow channel 301 is communicated with the second channel 520, and the bus bar 50 is connected with the liquid cooling plate 10. The first channel 510 is communicated with the liquid inlet end 102, and the second channel 520 is communicated with the liquid outlet end 103. The arrangement of the bus bar 50 makes two adjacent first plate bodies 20 connected through the bus bar 50, two adjacent second plate bodies 30 connected through the bus bar 50, and the liquid cooling plate 10 connected with the bus bar 50, so that one liquid cooling plate 10, two first plate bodies 20 and two second plate bodies 30 can be integrated through one bus bar 50, the integration degree is high, the space utilization is improved, and the bus bar 50 can also reduce the space occupation in the second direction Y, and improve the space utilization of the battery pack 1 in the second direction Y.

[0079] In some embodiments, the part of the bus bar 50 corresponding to the first channel 510 is connected with the first section 11 of the liquid cooling plate 10 to communicate the first channel 510 with the liquid inlet end 102, and the part of the bus bar 50 corresponding to the second channel 520 is connected with the second section 12 to communicate the second channel 520 with the liquid outlet end 103.

[0080] In some embodiments, referring to Figures 2-4 , Figures 8-9 and Figures 16-19 , the bus bar 50 includes a first bus bar 51 and a second bus bar 52 arranged along the third direction Z, referring to Figures 16-17 , the first channel 510 is arranged inside the first bus bar 51, referring to Figures 18-19 , the second channel 520 is arranged inside the second bus bar 52, referring to Figures 2-4 and Figures 8-9The two adjacent first plate bodies 20 are connected by a first convergence plate 51 to connect the first channel 510 with the second flow channel 201. The first convergence plate 51 is connected to the liquid cooling plate 10 to connect the first channel 510 with the liquid inlet end 102. Specifically, the first convergence plate 51 is connected to the first section 11 to connect the first channel 510 with the liquid inlet end 102. The two adjacent second plate bodies 30 are connected by a second convergence plate 52 to connect the second channel 520 with the liquid outlet end 103. Specifically, the second convergence plate 52 is connected to the second section 12 to connect the second channel 520 with the liquid outlet end 103. The busbar 50 is divided into a first busbar 51 and a second busbar 52 which are arranged along the third direction Z and are independent of each other, so that the first busbar 51 and the second busbar 52 do not interfere with each other or interfere with each other less. When the battery pack 1 shakes and causes the liquid cooling plate 10 to shake, the connection stability between the first busbar 51 and the first plate body 20 and the first section 11 can be guaranteed, and the connection stability between the second busbar 52 and the second plate body 30 and the second section 12 can be guaranteed, thereby ensuring the stability and safety of the battery pack 1.

[0081] In some embodiments, reference Figure 3 A busbar 50 corresponds to the first third liquid cooling plate 130 . Specifically, the first busbar 51 is connected to the first section 11 of the third liquid cooling plate 130 , and the second busbar 52 is connected to the second section 12 of the third liquid cooling plate 130 .

[0082] In some embodiments, reference Figure 16 The first busbar 51 has a dimension of L5 mm along the first direction X, that is, the distance between the two surfaces of the first busbar 51 opposite to each other along the first direction X is L5 mm. In other words, the length of the first busbar 51 is L5 mm. The first busbar 51 also has a dimension of W5 mm along the second direction Y, that is, the distance between the two surfaces of the first busbar 51 opposite to each other along the second direction Y is W5 mm. In other words, the thickness of the first busbar 51 is W5 mm. The first busbar 51 also has a dimension of H5 mm along the third direction Z, that is, the distance between the two surfaces of the first busbar 51 opposite to each other along the third direction Z is H5 mm. In other words, the height of the first busbar 51 is H5 mm, satisfying the following conditions: W5<L5, W5<H5. Therefore, under the premise of ensuring the flow of the heat transfer fluid in the first channel 510, the dimension of the first busbar 51 in the second direction Y is minimized, and a flat structure design of the first busbar 51 is realized, thereby reducing the space occupancy in the second direction Y and improving the space utilization of the battery pack 1 in the second direction Y.

[0083] In some implementations, reference Figures 8-9 as well as Figures 12-13The first manifold 51 includes a third body 511 and a third connecting portion 512. The first channel 510 is provided inside the third body 511 and passes through the third body 511 along the first direction X. L5, W5, and H5 are the dimensions of the third body 511. Specifically, the cross section of the third body 511 perpendicular to the first direction X is rectangular. The first manifold 51 is connected to the adjacent first plate 20 through the third body 511 to connect the first channel 510 with the second flow channel 201. The third connecting portion 512 is provided on a side of the third body 511 facing the third liquid cooling plate 130 along the second direction Y. The third connecting portion 512 is connected to the first section 11. Figures 16-17 The third connection portion 512 is provided with a third through hole 513 that passes through the third connection portion 512 along the second direction Y. The third through hole 513 is connected to the first channel 510. The first channel 510 is connected to the liquid inlet end 102 on the third liquid cooling plate 130 through the third through hole 513. Figure 17 The third connecting portion 512 defines a third groove 514 on a surface facing away from the third body 511 along the second direction Y. The third groove 514 has a third groove bottom 5141. The first section 11 of the third liquid cooling plate 130 is inserted into the third groove 514. The third groove bottom 5141 extends along the third direction Z. The third through-hole 513 penetrates one end of the third groove bottom 5141 along the third direction Z to communicate with the first channel 510. The provision of the third connecting portion 512 improves the connection stability between the first manifold 51 and the first section 11 of the third liquid cooling plate 130 in the liquid cooling plate 10. The provision of the third body 511, with dimension W5 along the second direction Y being the smallest of the three dimensions L5, W5, and H5 of the third body 511, reduces the space occupied by the third body 511 in the second direction Y, thereby improving the space utilization of the battery pack 1 in the second direction Y.

[0084] In some embodiments, reference Figure 18, the second bus plate 52 has a size L6 mm along the first direction X, that is, the distance between two surfaces of the second bus plate 52 arranged opposite along the first direction X is L6 mm, in other words, the length of the second bus plate 52 is L6 mm, the second bus plate 52 also has a size W6 mm along the second direction Y, that is, the distance between two surfaces of the second bus plate 52 arranged opposite along the second direction Y is W6 mm, in other words, the thickness of the second bus plate 52 is W6 mm, the second bus plate 52 also has a size H6 mm along the third direction Z, that is, the distance between two surfaces of the second bus plate 52 arranged opposite along the third direction Z is H6 mm, in other words, the height of the second bus plate 52 is H6 mm, and the following conditions are met: W6 < L6, W6 < H6, so as to reduce the size of the second bus plate 52 in the second direction Y as much as possible under the premise of ensuring the flow of the heat conducting fluid in the second channel 520, realize the flat structure design of the second bus plate 52, thereby reducing the space occupancy in the second direction Y and improving the space utilization of the battery pack 1 in the second direction Y.

[0085] In some embodiments, with reference to Figures 8-9 and Figures 18-19 , the second bus plate 52 includes a fourth body 521 and a fourth connecting part 522, the second channel 520 is arranged inside the fourth body 521 and penetrates through the fourth body 521 along the first direction, L6, W6 and H6 are the sizes of the fourth body 521, that is, the cross section of the fourth body 521 perpendicular to the first direction X is rectangular, the second bus plate 52 is connected with the adjacent second plate body 30 through the fourth body 521 to connect the second channel 520 and the third flow channel 301, the fourth connecting part 522 is arranged on one side of the fourth body 521 facing the third liquid cooling plate 130 along the second direction Y, the fourth connecting part 522 is connected with the second section 12, with reference to Figures 18-19 , the fourth connecting part 522 is provided with a fourth through hole 523 penetrating through the fourth connecting part 522 along the second direction Y, the fourth through hole 523 is communicated with the second channel 520, and the second channel 520 is communicated with the liquid outlet end 103 on the third liquid cooling plate 130 through the fourth through hole 523. With reference to Figure 19, the fourth connecting part 522 is provided with a fourth groove 524 on one side of the fourth body 521 away from the fourth body 521 along the second direction Y, the fourth groove 524 has a fourth groove bottom 5241, the second section 12 of the third liquid cooling plate 130 is inserted into the fourth groove 524, the fourth groove bottom 5241 extends along the third direction Z, and the fourth through hole 523 penetrates one end of the fourth groove bottom 5241 along the third direction Z to communicate with the second channel 520. The fourth connecting part 522 can improve the connection stability between the second bus bar 52 and the second section 12 of the third liquid cooling plate 130 in the liquid cooling plate 10. The fourth body 521 is provided, and the size W6 of the three sizes L6, W6 and H6 of the fourth body 521 along the second direction Y is the smallest, thereby reducing the space occupancy of the fourth body 521 along the second direction Y and improving the space utilization of the battery pack 1 along the second direction Y.

[0086] In some embodiments, with reference to Figures 8-9 , the third body 511 and the fourth body 521 are arranged along the third direction Z, and the third body 511 and the fourth body 521 are arranged apart along the first direction X, specifically, the third body 511 and the fourth body 521 are staggered along the first direction X, thereby ensuring the connection stability between the third body 511 and the first section 11, ensuring the connection stability between the fourth body 521 and the second section 12, and ensuring the use stability of the battery pack 1.

[0087] In some embodiments, with reference to Figure 3 and Figure 8 , a plurality of first plate bodies 20 are sequentially connected to form a first plate group 200 along the first direction X through the first bus bar 51, the liquid supply end plate 41 is connected to one end of the first plate group 200 along the first direction X, and the other end of the first plate group 200 along the first direction X is connected to one first bus bar 51, which is connected to the first section 11 of the second liquid cooling plate 120. A plurality of second plate bodies 30 are sequentially connected to form a second plate group 300 along the first direction X through the second bus bar 52, the liquid return end plate 42 is connected to one end of the second plate group 300 along the first direction X, and the other end of the second plate group 300 along the first direction X is connected to one second bus bar 52, which is connected to the second section 12 of the second liquid cooling plate 120.

[0088] In some embodiments, with reference to Figure 1 , the battery pack 1 further comprises a box body 70, the box body 70 is internally provided with an accommodating cavity 701, an opening 711 communicating with the accommodating cavity 701 is formed on the side wall 71 of the box body 70, the liquid cooling plate 10, the first plate body 20, the second plate body 30, the end plate 40, the bus bar 50 and the battery cell 60 are all arranged in the accommodating cavity 701, and the liquid supply connector 411 and the liquid return connector 421 are respectively inserted into the opening 711.

[0089] In some embodiments, with reference toFigure 2 The battery pack 1 further comprises a tray 72, which is arranged in the accommodating cavity 701, and the battery cell 60 is a cylindrical battery, and the battery cell 60 is arranged on the tray 72.

[0090] The above describes the technical solutions provided by the embodiments of the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples; the above embodiment descriptions are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above descriptions should not be understood as limiting the present application.

Claims

1. A battery pack having a first direction, a second direction, and a third direction intersecting each other, characterized in that: The battery pack includes: a liquid cooling plate extending along the second direction, having a first flow channel provided therein for the flow of a heat-conducting fluid, and a liquid inlet and a liquid outlet provided at one end of the liquid cooling plate along the second direction, each of the liquid cooling plate and the first flow channel being connected thereto; a first plate extending along the first direction, wherein a cross section of the first plate intersecting the first direction is square, wherein a second flow channel is provided inside the first plate, wherein the first plate is connected to the liquid cooling plate, and wherein the second flow channel is connected to the liquid inlet; a second plate extending along the first direction, the cross section of the second plate intersecting the first direction being square, a third flow channel being provided inside the second plate, the second plate being connected to the liquid cooling plate, and the third flow channel being in communication with the liquid outlet; The first plate and the second plate are arranged along the third direction.

2. The battery pack according to claim 1, wherein: The first plate has a dimension L1 mm along the first direction, a dimension W1 mm ​​along the second direction, and a dimension H1 mm along the third direction, satisfying: W1<L1, W1<H1; And / or, the second plate has a dimension L2 mm along the first direction, a dimension W2 mm along the second direction, and a dimension H2 mm along the third direction, satisfying: W2<L2, W2<H2.

3. The battery pack according to claim 1, wherein: Along the second direction, part of the first plate body protrudes toward the liquid cooling plate to form a first protrusion, and / or part of the second plate body protrudes toward the liquid cooling plate to form a second protrusion.

4. The battery pack according to claim 3, wherein: A first cavity is defined inside the first protrusion, and a second cavity is defined inside the second protrusion; The first protrusion and the second protrusion are arranged along the third direction, and the first cavity and the second cavity are communicated along the third direction.

5. The battery pack according to claim 1, wherein: The liquid cooling plate includes a first section, a second section, and a third section, wherein the first section and the second section are spaced apart along the first direction; Along the second direction, the same end of the first section and the second section is connected through the third section, the liquid inlet end is provided at the end of the first section away from the third section, and the liquid outlet end is provided at the end of the second section away from the third section; The first plate is connected to the first section to connect the second flow channel and the liquid inlet end; The second plate is connected to the second section to connect the third flow channel and the liquid outlet.

6. The battery pack according to claim 1, wherein: The battery pack further includes an end plate, the end plate being disposed on the same side of the first plate body and the second plate body along the first direction, and the end plate having a liquid supply channel and a liquid return channel spaced apart along the third direction; The end plate is connected to the first plate body, the liquid supply channel is connected to the second channel, the end plate is connected to the second plate body, and the liquid return channel is connected to the third channel; The end plate is connected to the liquid cooling plate, the liquid supply channel is communicated with the liquid inlet end, and the liquid return channel is communicated with the liquid outlet end.

7. The battery pack according to claim 6, wherein: The end plate includes a liquid supply end plate and a liquid return end plate spaced apart along the third direction, the liquid supply flow channel is provided inside the liquid supply end plate, and the liquid return flow channel is provided inside the liquid return end plate; The liquid supply end plate is connected to the first plate body to connect the liquid supply channel and the second channel, and the liquid supply end plate is connected to the liquid cooling plate to connect the liquid supply channel and the liquid inlet end; The liquid return end plate is connected to the second plate body to connect the liquid return flow channel and the third flow channel, and the liquid return end plate is connected to the liquid cooling plate to connect the liquid return flow channel and the liquid outlet end; The liquid supply end plate has a dimension L3 mm along the first direction, a dimension W3 mm along the second direction, and a dimension H3 mm along the third direction, satisfying: W3<L3, W3<H3; And / or, the liquid return end plate has a dimension of L4 mm along the first direction, a dimension of W4 mm along the second direction, and a dimension of H4 mm along the third direction, satisfying: W4<L4, W4<H4.

8. The battery pack according to claim 1, wherein: The battery pack further includes a busbar, wherein a first channel and a second channel are provided inside the busbar and are spaced apart along the third direction; There are multiple first plates, which are spaced apart along the first direction, two adjacent first plates are connected by a busbar, and the second flow channel is connected to the first channel; there are multiple second plates, which are spaced apart along the first direction, two adjacent second plates are connected by a busbar, and the third flow channel is connected to the second channel; The confluence plate is connected to the liquid cooling plate, the first channel is communicated with the liquid inlet end, and the second channel is communicated with the liquid outlet end.

9. The battery pack according to claim 8, wherein: The busbar includes a first busbar and a second busbar arranged along the third direction, the first channel is provided inside the first busbar, and the second channel is provided inside the second busbar; The first confluence plate is connected to the first plate body to connect the first channel and the second flow channel, and the first confluence plate is connected to the liquid cooling plate to connect the first channel and the liquid inlet end; The second manifold is connected to the second plate body to connect the second channel and the third flow channel, and the second manifold is connected to the liquid cooling plate to connect the second channel and the liquid outlet; The first busbar has a dimension of L5 mm along the first direction, a dimension of W5 mm along the second direction, and a dimension of H5 mm along the third direction, satisfying: W5<L5, W5<H5; And / or, the second busbar has a dimension of L6 mm along the first direction, a dimension of W6 mm along the second direction, and a dimension of H6 mm along the third direction, satisfying: W6<L6, W6<H6.

10. An electrical device, characterized in that: The invention comprises a battery pack according to any one of claims 1 to 9.

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