Battery pack and electric device

Abstract

According to the battery pack, a current collecting piece is arranged on the first face of a liquid cooling plate, a first cavity and a second cavity are formed in the current collecting piece, a first liquid outlet and a second liquid outlet are formed in the first wall of the current collecting piece, the second liquid inlet is communicated with the first liquid inlet, the second liquid outlet is communicated with the first liquid outlet, and the second liquid outlet is communicated with the second liquid outlet; an opening is formed in the second wall, the portion, located on the periphery of the first liquid outlet, of the first wall is connected with the first face in a sealed mode through the opening, and the portion, located on the periphery of the first liquid inlet, of the first wall is connected with the first face in a sealed mode through the opening. Therefore, sealing of the communication position of the first liquid outlet and the second liquid outlet and sealing of the communication position of the first liquid inlet and the second liquid inlet are achieved, the situation of liquid leakage in the circulating liquid inlet and outlet process of the heat-conducting medium is avoided, the heat conduction effect of the liquid cooling plate is guaranteed, the service life of the battery pack is prolonged, and the use safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and an electric device. Background Art

[0002] The existing assembly between the liquid cooling plate and the current collecting box is to weld the outer periphery of the current collecting box to the liquid cooling plate. The welding process can easily cause deformation of the current collecting box and the liquid cooling plate, affecting the flatness of the contact surface between the liquid cooling plate and the current collecting box, and easily cause gaps to appear between the liquid inlet and outlet on the current collecting box and the liquid inlet and outlet on the liquid cooling plate, thereby increasing the risk of liquid inlet and liquid outlet cross-flow and leakage of the heat transfer medium, affecting the thermal conduction effect of the liquid cooling plate, and affecting the service life and safety of the battery pack. Utility Model Content

[0003] The purpose of the present application is to provide a battery pack and an electrical device to solve the problem that the liquid cooling plate in the current battery pack has the risk of cross-flow and leakage, which affects the safety and service life of the battery pack.

[0004] A first aspect of an embodiment of the present application provides a battery pack, the battery pack having a first direction and a third direction intersecting each other, the battery pack comprising: a liquid cooling plate, a flow channel for a heat-conducting medium to flow is provided inside the liquid cooling plate, the flow channel extends along the first direction, the liquid cooling plate comprises a first surface and a second surface arranged opposite to each other along the third direction, a first liquid inlet and a first liquid outlet respectively connected to the flow channel are provided on the first surface; a current collecting member is provided on the first surface, a first chamber and a second chamber arranged at intervals along the first direction are provided inside the current collecting member, the current collecting member comprises a first wall and a second wall arranged opposite to each other along the third direction; the first wall abuts against the first surface, the first wall is in contact with the first surface, and the first wall is in contact with the first surface. A second liquid inlet connected to the first chamber and a second liquid outlet connected to the second chamber are provided on a wall, the second liquid inlet is connected to the first liquid inlet, and the second liquid outlet is connected to the first liquid outlet; an opening is provided on the second wall, the first chamber and the second chamber are connected to the openings respectively, the second liquid inlet and the second liquid outlet are respectively arranged opposite to the opening along the third direction, so that the first wall located at the periphery of the second liquid inlet is sealedly connected to the first surface through the opening, and the first wall located at the periphery of the second liquid outlet is sealedly connected to the first surface through the opening; a first blocking member is sealedly connected to the opening.

[0005] Optionally, the opening includes a first opening and a second opening, the first opening is connected to the first chamber, and the second opening is connected to the second chamber; the first opening and the second liquid inlet are arranged relative to each other along the third direction, so that the first wall located at the periphery of the second liquid inlet is sealedly connected to the first surface located at the periphery of the first liquid inlet through the first opening; the second opening and the second liquid outlet are arranged relative to each other along the third direction, so that the first wall located at the periphery of the second liquid outlet is sealedly connected to the first surface located at the periphery of the first liquid outlet through the second opening.

[0006] Optionally, the battery pack also includes a liquid inlet pipe and a liquid outlet pipe; the second wall is provided with a liquid inlet port connected to the first chamber and a liquid outlet port connected to the second chamber, the liquid inlet pipe is inserted into the liquid inlet port to provide heat-conducting medium to the first chamber, and the liquid outlet pipe is inserted into the liquid outlet port to discharge the heat-conducting medium in the second chamber.

[0007] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction intersect each other; a cavity is provided inside the current collecting member, and a first partition is provided in the cavity, and the first partition extends along the second direction to divide the cavity into the first chamber and the second chamber; or, the number of the current collecting members is two, and the two current collecting members are arranged on the first surface at intervals along the first direction, one of the current collecting members has the first chamber inside, and the other current collecting member has the second chamber inside.

[0008] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction intersect each other; the liquid cooling plate includes a third surface and a fourth surface arranged opposite to each other along the first direction; at least one second partition is provided inside the liquid cooling plate, the second partition extends along the first direction, and the opposite ends of the second partition along the first direction are respectively connected to the third surface and the fourth surface to form at least two of the flow channels arranged at intervals along the second direction inside the liquid cooling plate.

[0009] Optionally, a third partition is provided inside the flow channel, and the third partition extends along the first direction, and one end of the third partition along the first direction is connected to the third surface, and a first gap exists between the other end and the fourth surface; the third partition divides the flow channel into a liquid inlet section and a liquid outlet section which are spaced apart along the second direction, and the liquid inlet section and the liquid outlet section are connected through the first gap; the liquid inlet section is connected to the first liquid inlet, and the liquid outlet section is connected to the first liquid outlet.

[0010] Optionally, at least one fourth partition is provided inside the liquid inlet section, the fourth partition extends along the first direction, and there are second gaps between the opposite ends of the fourth partition along the first direction and the third surface and the fourth surface respectively, and the fourth partition divides the liquid inlet section into at least two liquid inlet channels spaced apart along the second direction, and at least two of the liquid inlet channels are connected through the second gap; and / or, at least one fourth partition is provided inside the liquid outlet section, the fourth partition extends along the first direction, and there are second gaps between the opposite ends of the fourth partition along the first direction and the third surface and the fourth surface respectively, and the fourth partition divides the liquid outlet section into at least two liquid outlet channels spaced apart along the second direction, and at least two of the liquid outlet channels are connected through the second gap.

[0011] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction intersect each other; the battery pack also includes a box, a connector and a fixing member, a housing chamber is provided inside the box, the box includes a first end wall and a second end wall arranged opposite to each other along the third direction, and a mounting hole is provided on the first end wall and passes through the first end wall along the third direction; the liquid cooling plate is arranged in the housing chamber, and the liquid cooling plate and the first end wall are arranged at intervals along the third direction; the number of the liquid cooling plates is at least two, at least two of the liquid cooling plates are arranged at intervals along the second direction, and grooves are respectively provided on the second surfaces of at least two of the liquid cooling plates on adjacent sides along the second direction; the connecting member is arranged between the first end wall and the liquid cooling plate, and the opposite ends of the connecting member along the second direction are respectively inserted into the grooves, and the fixing member passes through the mounting hole along the third direction and is inserted into the connecting member to fix the at least two liquid cooling plates to the first end wall.

[0012] Optionally, the connecting member includes a main body and two protrusions, the two protrusions are spaced apart on a side of the main body facing away from the first end wall in the third direction, the two protrusions are spaced apart along the second direction, and the protrusions are inserted in the groove; a fixing hole is provided on the main body and passes through the main body along the third direction, the fixing hole is connected with the mounting hole along the third direction, and the fixing member is inserted in the mounting hole and the fixing hole.

[0013] Optionally, the liquid cooling plate also includes a second sealing member and a third sealing member; the liquid cooling plate includes a third surface and a fourth surface arranged opposite to each other along the first direction, the third surface is provided with a first through hole connected to the flow channel, and the fourth surface is provided with a second through hole connected to the flow channel; the second sealing member is inserted into the first through hole to seal the third surface, and the third sealing member is inserted into the second through hole to seal the fourth surface.

[0014] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction intersect each other; the current collecting part includes a third wall and a fourth wall arranged opposite to each other along the second direction, and the current collecting part also includes a fourth blocking part and a fifth blocking part; the third wall is provided with a third through hole connected to the first chamber and a fourth through hole connected to the second chamber, and the fourth wall is provided with a fifth through hole connected to the first chamber and a sixth through hole connected to the second chamber; the fourth blocking part is respectively inserted into the third through hole and the fourth through hole, and the fifth blocking part is respectively inserted into the fifth through hole and the sixth through hole.

[0015] A second aspect of an embodiment of the present application provides an electrical device, comprising the battery pack as described above.

[0016] In summary, the embodiments of the present application provide a battery pack and an electrical device having the battery pack, wherein the battery pack is configured by arranging a current collecting member on the first surface of a liquid cooling plate, arranging a first chamber and a second chamber arranged at intervals inside the current collecting member, and providing a second liquid inlet connected to the first chamber and a second liquid outlet connected to the second chamber on the first wall of the current collecting member, the second liquid inlet is connected to the first liquid inlet on the liquid cooling plate, and the second liquid outlet is connected to the first liquid outlet on the liquid cooling plate, thereby separating the liquid inlet and the liquid outlet in the current collecting member to avoid cross-flow and ensure the heat conduction effect of the liquid cooling plate. An opening is provided on the second wall of the current collecting member, and the first chamber and the second chamber are connected with the openings respectively, so that the first wall located at the periphery of the first liquid outlet can be sealedly connected to the first surface through the opening, and the first wall located at the periphery of the first liquid inlet can be sealedly connected to the first surface through the opening, so that the sealing of the connection between the first liquid outlet and the second liquid outlet and the sealing of the connection between the first liquid inlet and the second liquid inlet are achieved on the premise that the first liquid outlet is connected to the second liquid outlet and the first liquid inlet is connected to the second liquid inlet, thereby avoiding leakage during the circulation of the heat transfer medium in and out, ensuring the heat conduction effect of the liquid cooling plate, and improving the service life and safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at B;

[0021] Figure 4 is a structural schematic diagram of a combination of a liquid cooling plate and a current collector in a battery pack provided in an embodiment of the present application at a first angle;

[0022] Figure 5 yes Figure 4 Side view of

[0023] Figure 6 It is a structural schematic diagram of a combination of a liquid cooling plate and a current collector in a battery pack provided in an embodiment of the present application at a second angle and an enlarged structural schematic diagram at position C;

[0024] Figure 7 is a structural schematic diagram of a combination of a liquid cooling plate and a current collector in a battery pack provided by an embodiment of the present application from a third angle;

[0025] Figure 8 yes Figure 7 A schematic diagram of a structure in which some connecting parts are removed;

[0026] Fig. 9 yes Figure 4 DD section view;

[0027] Fig.10 yes Fig. 9 A schematic diagram of the structure at E of FIG.

[0028] Fig.11 yes Figure 5 FF section view;

[0029] Fig.12 is a schematic structural diagram of a liquid cooling plate in a battery pack provided in an embodiment of the present application at a first angle;

[0030] Fig.13 is a schematic structural diagram of a second angle of a liquid cooling plate in a battery pack provided in an embodiment of the present application;

[0031] Fig.14 is a schematic structural diagram of a current collector in a battery pack provided in an embodiment of the present application at a first angle;

[0032] Fig.15 is a schematic structural diagram of a current collector in a battery pack provided in an embodiment of the present application at a second angle;

[0033] Fig.16 yes Fig.14 GG section view;

[0034] Fig.17 is a schematic diagram of the structure of the connector in the battery pack provided in the embodiment of the present application;

[0035] Fig.18 is a schematic structural diagram of a second blocking member in a battery pack provided in an embodiment of the present application;

[0036] Fig.19 It is a schematic diagram of the structure of the third blocking member in the battery pack provided in the embodiment of the present application.

[0037] Description of main reference numerals:

[0038] 1. Battery pack;

[0039] 10. Liquid cooling plate, 10a. First liquid cooling plate, 10b. Second liquid cooling plate, 101. First surface, 102. Second surface, 1021. Groove, 103. Third surface, 1031. First through hole, 104. Fourth surface, 1041. Second through hole, 11. Channel, 111. Liquid inlet section, 1111. Liquid inlet channel, 112. Liquid outlet section, 1121. Liquid outlet channel, 12. First liquid inlet, 13. First liquid outlet, 14. Second partition, 15. Third partition, 151. First gap, 16. Fourth partition, 161. Second gap, 17. Second blocking member, 171. First blocking portion, 18. Third blocking member, 181. Second blocking portion;

[0040] 20. current collecting member, 200. cavity, 201. first chamber, 202. second chamber, 203. first partition, 21. first wall, 211. second liquid inlet, 212. second liquid outlet, 22. second wall, 220. opening, 221. first opening, 222. second opening, 223. liquid inlet port, 224. liquid outlet port, 23. third wall, 231. third through hole, 232. fourth through hole, 24. fourth wall, 241. fifth through hole, 242. sixth through hole, 25. fourth blocking member, 26. fifth blocking member;

[0041] 30. first blocking member, 40. liquid inlet pipe, 41. liquid inlet terminal, 50. liquid outlet pipe, 51. liquid outlet terminal;

[0042] 60. box body, 601. accommodating cavity, 602. supporting beam, 61. first end wall, 611. mounting hole, 62. second end wall, 621. third opening, 63. third end wall, 64. fourth end wall;

[0043] 70, connecting piece, 701, body, 702, protrusion, 703, fixing hole, 71, fixing piece;

[0044] 80. Insulation layer;

[0045] X, first direction, Y, second direction, Z, third direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and beneficial effects of this application more clear, the following further describes this application in detail in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining this application, not for limiting this application.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the application examples, "parallel" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. In addition, "perpendicular" means that the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles refer to a state where the tolerance range is -1% to 1%.

[0051] This embodiment provides an electric device, including a battery pack 1, the battery pack 1 serving as a power supply for the electric device. The electric device may be, but is not limited to, a mobile device (such as a mobile phone, a laptop computer, etc.), an electric vehicle (such as 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 to 19 The battery pack 1 includes: a liquid cooling plate 10, a current collector 20 and a first blocking member 30. The battery pack 1 has a first direction X, a second direction Y and a third direction Z intersecting each other. Figures 1 to 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 Figure 1-2 as well as Figures 4 to 13 , please refer to Fig.11 , a flow channel 11 for the flow of heat-conducting medium is provided inside the liquid cooling plate 10, and the flow channel 11 extends along the first direction X, referring to Figures 4 to 8 as well as Figure 12-13 The liquid cooling plate 10 includes a first surface 101 and a second surface 102 arranged opposite to each other along a third direction Z. Figure 12 to Figure 15 The liquid cooling plate 10 further includes a third surface 103 and a fourth surface 104 arranged opposite to each other along the first direction X, referring to Fig.12 A first liquid inlet 12 and a first liquid outlet 13 which are respectively connected to the flow channel 11 are formed on the first surface 101 of the liquid cooling plate 10 .

[0054] Reference Figure 1 , Figures 4 to 6 , Fig. 9 as well as Figure 14 to Figure 16 , please refer to Figure 1 , Figure 4 , Figure 6 as well as Fig. 9 The current collecting member 20 is disposed on the first surface 101 of the liquid cooling plate 10, and the current collecting member 20 extends along the second direction Y. Fig.16 The current collecting member 20 is provided with a first chamber 201 and a second chamber 202 spaced apart along the first direction X, referring to Fig. 9 as well as Figure 14 to Figure 16The current collecting member 20 includes a first wall 21 and a second wall 22 arranged opposite to each other along the third direction Z. Fig. 9 The first wall 21 of the current collector 20 abuts against the first surface 101 of the liquid cooling plate 10. In other words, the first wall 21 and the first surface 101 overlap along the third direction Z. Figure 14 to Figure 16 The first wall 21 is provided with a second liquid inlet 211 communicating with the first chamber 201 and a second liquid outlet 212 communicating with the second chamber 202. The second liquid inlet 211 is communicated with the first liquid inlet 12 provided on the first surface 101 of the liquid cooling plate 10, and the second liquid outlet 212 is communicated with the first liquid outlet 13 provided on the first surface 101 of the liquid cooling plate 10. Fig.14 An opening 220 is provided on the second wall 22 of the current collecting member 20, the first chamber 201 and the second chamber 202 are respectively communicated with the opening 220, the second liquid inlet 211 and the second liquid outlet 212 are respectively arranged opposite to the opening 220 along the third direction Z. Specifically, the second liquid inlet 211 and the opening 220 are arranged opposite to each other along the third direction Z, so that the first wall 21 located at the periphery of the second liquid inlet 211 is sealedly connected to the first surface 101 of the liquid cooling plate 10 through the opening 220; specifically, the first wall 21 located at the periphery of the second liquid inlet 211 is sealedly connected to the first surface 101 located at the periphery of the first liquid inlet 12 through the opening 220. The second liquid outlet 212 and the opening 220 are arranged opposite to each other along the third direction Z, so that the first wall 21 located at the periphery of the second liquid outlet 212 is sealedly connected to the first surface 101 of the liquid cooling plate 10 through the opening 220. Specifically, the first wall 21 located at the periphery of the second liquid outlet 212 is sealedly connected to the first surface 101 located at the periphery of the first liquid outlet 13 through the opening 220.

[0055] Reference Figure 1 , Figure 4 , Figure 6 as well as Fig. 9 The blocking member 30 is sealingly connected to the opening 220 to form a seal for the first chamber 201 and the second chamber 202 .

[0056] In existing battery packs, in order to ensure the smooth flow of the heat-conducting medium in the liquid cooling plate, it is necessary to set a collecting box on the liquid cooling plate. The function of the collecting box is to centrally manage the supply and return of the heat-conducting medium from the supply source. Specifically, the externally supplied heat-conducting medium enters the flow channel of the liquid cooling plate through the collecting box and exchanges heat with the battery cells in the battery pack to adjust the temperature of the battery cells. The heat-conducting medium after the heat exchange is centralized and returned to the external supply source through the collecting box to realize the circulation of the heat-conducting medium. The existing assembly method between the collecting box and the liquid cooling plate is to weld the outer periphery of the collecting box and the liquid cooling plate together. This method of full welding of the outer ring accumulates high heat during the welding process, which can easily cause deformation of the collecting box and / or the liquid cooling plate, affecting the flatness of the contact surface between the collecting box and the liquid cooling plate, and further causing a gap between the liquid inlet on the liquid cooling plate and the liquid inlet on the collecting box, and causing a gap between the liquid outlet on the liquid cooling plate and the liquid outlet on the collecting box, which in turn causes cross-flow of the liquid inlet and liquid outlet (i.e., return liquid) of the heat conduction cutoff and an increased risk of leakage of the heat transfer medium, affecting the heat conduction effect between the liquid cooling plate and the battery cell, and affecting the service life and safety of the battery pack.

[0057] In the battery pack 1 provided in the embodiment of the present application, the current collector 20 is arranged on the first surface 101 of the liquid cooling plate 10, and the first wall 21 of the current collector 20 is in contact with the first surface 101 of the liquid cooling plate 10. A first chamber 201 and a second chamber 202 are arranged at intervals inside the current collector 20, and a second liquid inlet 211 communicating with the first chamber 201 and a second liquid outlet 212 communicating with the second chamber 202 are opened on the first wall 21, and the second liquid inlet 211 is connected to the first liquid inlet 12 on the first surface 101 of the liquid cooling plate 10, and the second liquid outlet 212 is connected to the first liquid outlet 13 on the first surface 101 of the liquid cooling plate 10, thereby separating the liquid inlet passage (located in the first chamber 201) and the liquid outlet passage (located in the second chamber 202) between the current collector 20 and the liquid cooling plate 10; and an opening 220 is opened on the second wall 22 of the current collector 20, so that the first chamber 201 and the second chamber 202 are connected. The chambers 202 are respectively connected to the openings 220, so that the first wall 21 located at the periphery of the second liquid inlet 211 can be sealed and connected to the first surface 101 of the liquid cooling plate 10 through the openings 220, and the first wall 21 located at the periphery of the second liquid outlet 212 can be sealed and connected to the first surface 101 of the liquid cooling plate 10 through the openings 220. In other words, it is only necessary to seal and connect the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 through the openings 220 to form a partial seal, and to seal and connect the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 through the openings 220 to form a partial seal. Compared with the existing assembly method of sealing the outer periphery of the current collecting member 20 and the first surface 101 of the liquid cooling plate 10 as a whole, the local sealing effectively reduces the probability of deformation of the current collecting member 20 and / or the liquid cooling plate 10 during the sealing process, thereby ensuring the flatness of the first wall 21 of the current collecting member 20 and the first surface 101 of the liquid cooling plate 10, and reducing the risk of cross-flow between liquid entering the first chamber 201 and liquid exiting the second chamber 202. Moreover, the connection between the second liquid inlet 211 and the first liquid inlet 12 is sealed, and the connection between the second liquid outlet 212 and the first liquid outlet 13 is sealed, so that the heat-conducting medium in the first chamber 201 can only enter the liquid cooling plate 10 through the first liquid inlet 12, and the heat-conducting medium in the liquid cooling plate 10 after heat exchange can only enter the second chamber 202 through the first liquid outlet 13, further reducing the risk of cross-flow between the liquid inlet of the first chamber 201 and the liquid outlet of the second chamber 202 and the risk of leakage of the heat-conducting medium. Moreover, the setting of the first blocking member 30 can form a blockage for the opening 220, ensuring the sealing of the first chamber 201 and the second chamber 202, thereby ensuring the heat conduction effect between the liquid cooling plate 10 and the battery cell, and improving the service life and safety of the battery pack 1. Moreover, the structural design of the current collector 20 can reduce the use of faucets and quick-connect plugs in the battery pack 1, and reduce the manufacturing cost of the battery pack 1.

[0058] In some embodiments, the first blocking member 30 is welded to the opening 220 to form a fixed connection. After the connection between the second liquid inlet 211 and the first liquid inlet 12 is sealed, the first blocking member 30 is welded to the opening 220 to seal.

[0059] In some embodiments, the first blocking member 30 is detachably connected to the opening 220 . For example, the first blocking member 30 covers the opening 220 , and a sealing ring is provided between the first blocking member 30 and the opening 220 to achieve a sealed connection, which is convenient for subsequent care and maintenance.

[0060] In some embodiments, reference Fig.14 The opening 220 includes a first opening 221 and a second opening 222. The first opening 221 is connected to the first chamber 201. The first opening 221 and the second liquid inlet 211 are arranged opposite to each other along the third direction Z, so that the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 are sealed and connected through the first opening 221. The second opening 222 is connected to the second chamber 202. The second opening 222 and the second liquid outlet 212 are arranged opposite to each other along the third direction Z, so that the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 are sealed and connected through the second opening 222. The interval arrangement of the first opening 221 and the second opening 222 can form an opening design that connects the first chamber 201 and the second chamber 202 respectively, avoiding the situation that one opening spans the first chamber 201 and the second chamber 202, thereby ensuring the strength of the current collecting member 20.

[0061] In some embodiments, the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 are welded and connected through the first opening 221 to seal the connection between the second liquid inlet 211 and the first liquid inlet 12. Specifically, the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 can be sealed and connected by laser welding through the first opening 221. Specifically, the laser welding is performed by segment welding. Compared with the outer circle full welding, the segment welding has a short weld and relatively low heat accumulated during the welding process, which effectively reduces the deformation problem of the collector 20 and the liquid cooling plate 10 caused by welding.

[0062] In some embodiments, the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 are welded and connected through the second opening 222 to seal the connection between the second liquid outlet 212 and the first liquid outlet 13. Specifically, the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 can be sealed by laser welding through the second opening 222. Specifically, the laser welding is performed by segment welding.

[0063] In some embodiments, the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 are glued together through the first opening 221 to seal the connection between the second liquid inlet 211 and the first liquid inlet 12. Specifically, a glue gun can be used to spray glue between the first wall 21 located at the periphery of the second liquid inlet 211 and the first surface 101 located at the periphery of the first liquid inlet 12 through the first opening 221 to achieve a sealed connection.

[0064] In some embodiments, the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 are glued together through the second opening 222 to seal the connection between the second liquid outlet 212 and the first liquid outlet 13. Specifically, a glue gun can be used to spray glue between the first wall 21 located at the periphery of the second liquid outlet 212 and the first surface 101 located at the periphery of the first liquid outlet 13 through the second opening 222 to achieve a sealed connection.

[0065] In some embodiments, reference Fig.12 The number of the first liquid inlet 12 on the liquid cooling plate 10 is multiple, and they are arranged on the first surface 101 at intervals along the second direction Y. The second liquid inlet 211 on the first wall 21 of the current collector 20 corresponds to the first liquid inlet 12 in number. One first opening 221 is arranged opposite to at least one second liquid inlet 211 along the third direction Z. Fig.14 In the illustrated embodiment, the first openings 221 correspond one to one with the second liquid inlets 211 in number. In other implementations, one first opening 221 may correspond to a plurality of second liquid inlets 211 , which may be selected according to actual use requirements.

[0066] In some embodiments, reference Fig.12 The number of the first liquid outlets 13 on the liquid cooling plate 10 is multiple, and they are arranged on the first surface 101 at intervals along the second direction Y. The second liquid outlets 212 on the first wall 21 of the current collector 20 correspond to the first liquid outlets 13 in number. One second opening 222 is arranged opposite to at least one second liquid outlet 212 along the third direction Z. Specifically, Fig.14In the illustrated embodiment, the second openings 222 correspond one to one with the second liquid outlets 212 in number. In other implementations, one second opening 222 may correspond to a plurality of second liquid outlets 212 , which may be selected according to actual use requirements.

[0067] In some embodiments, the flow uniformity of the liquid cooling plate 10 between adjacent battery cells in the second direction Y can be adjusted by adjusting the inner diameters of the first liquid inlet 12 and the first liquid outlet 13 on the liquid cooling plate 10 . Meanwhile, the improved flow uniformity also reduces the pressure drop of the liquid cooling plate 10 .

[0068] In some embodiments, reference Fig.16 The current collector 20 has a cavity 200 disposed therein, and a first partition 203 is disposed in the cavity 200. The first partition 203 extends along the second direction Y, and the first partition 203 divides the cavity 200 into a first chamber 201 and a second chamber 202 spaced apart along the first direction X. The first partition 203 can form a first chamber 201 and a second chamber 202 that are independent of each other in one current collector 20, thereby reducing the manufacturing cost of the current collector 20.

[0069] In some embodiments, there are two current collecting parts 20, and the two current collecting parts 20 are arranged on the first surface 101 of the liquid cooling plate 10 at intervals along the first direction X. A first chamber 201 is provided inside one current collecting part 20, and a second chamber 202 is provided inside the other current collecting part 20, thereby completely separating the first chamber 201 and the second chamber 202, further avoiding cross-flow between the liquid inlet in the first chamber 201 and the liquid outlet in the second chamber 202.

[0070] In some embodiments, reference Figure 1 The battery pack 1 also includes a liquid inlet pipe 40 and a liquid outlet pipe 50, referring to Fig.14The second wall 22 of the current collector 20 is provided with a liquid inlet port 223 communicating with the first chamber 201 and a liquid outlet port 224 communicating with the second chamber 202. The liquid inlet pipe 40 is inserted into the liquid inlet port 223 to provide a heat-conducting medium to the first chamber 201. Specifically, the heat-conducting medium provided by the liquid inlet pipe 40 enters the flow channel 11 of the liquid cooling plate 10 through the second liquid inlet port 211 and the first liquid inlet port 12 to conduct heat with the battery cells in the battery pack 1. The liquid outlet pipe 50 is inserted into the liquid outlet port 224 to discharge the heat-conducting medium in the second chamber 202. Specifically, the heat-conducting medium in the flow channel 11 of the liquid cooling plate 10 after heat conduction enters the second chamber 202 through the first liquid outlet port 13 and the second liquid outlet port 212, and is discharged through the liquid outlet pipe 50. The arrangement of the liquid inlet pipe 40 and the liquid outlet pipe 50 can cooperate with the current collecting member 20 to centrally supply the heat-conducting medium to the liquid cooling plate 10, and can cooperate with the current collecting member 20 to centrally discharge the heat-conducting medium after the heat exchange, thereby reducing the use of faucets and quick-connect plugs in the battery pack 1, reducing the manufacturing cost of the battery pack 1, and improving the space utilization inside the battery pack 1.

[0071] In some embodiments, reference Figure 1 and Figure 2 The battery pack 1 also includes a box body 60, and a receiving cavity 601 is provided inside the box body 60. The box body 60 includes a first end wall 61 and a second end wall 62 that are arranged opposite to each other along the third direction Z. The second end wall 62 is provided with a third opening 621 that communicates with the receiving cavity 601. Figure 1 The box body 60 also includes a third end wall 63 and a fourth end wall 64 arranged opposite to each other along the first direction X. The liquid inlet pipe 40 and the liquid outlet pipe 50 are respectively inserted on the third end wall 63. The liquid inlet pipe 40 and the liquid outlet pipe 50 are arranged at intervals along the second direction Y. The end of the liquid inlet pipe 40 away from the liquid inlet port 223 is located outside the box body 60, and the end of the liquid outlet pipe 50 away from the liquid outlet port 224 is located outside the box body 60.

[0072] In some embodiments, reference Fig.11 At least one second partition 14 is provided inside the liquid cooling plate 10, and the second partition 14 extends along the first direction X. The opposite ends of the second partition 14 along the first direction X are respectively connected to the third surface 103 and the fourth surface 104 of the liquid cooling plate 10, so as to form at least two flow channels 11 spaced apart along the second direction Y inside the liquid cooling plate 10, as shown in FIG. Fig.11In the illustrated embodiment, the number of second partitions 14 inside each liquid cooling plate 10 is two, and the two second partitions 14 are arranged at intervals along the second direction Y to form three independent flow channels 11 arranged at intervals along the second direction Y inside the liquid cooling plate 10. The design of the second partition 14 can increase the number of flow channels 11 inside the liquid cooling plate 10, thereby improving the utilization efficiency of the heat transfer medium inside the liquid cooling plate 10. Among them, the first liquid inlet 12 on the liquid cooling plate 10 corresponds to the flow channel 11 in number, and the first liquid outlet 13 corresponds to the flow channel 11 in number.

[0073] In some embodiments, reference Fig.11 A third partition 15 is provided inside the flow channel 11 of the liquid cooling plate 10. The third partition 15 extends along the first direction X. One end of the two opposite ends of the third partition 15 along the first direction X is connected to the third surface 103 of the liquid cooling plate 10, and a first gap 151 exists between the other end and the fourth surface 104. The third partition 15 divides the flow channel 11 into a liquid inlet section 111 and a liquid outlet section 112 spaced apart along the second direction Y. The liquid inlet section 111 and the liquid outlet section 112 are connected through the first gap 151. The liquid inlet section 111 is connected to the first liquid inlet 12 of the liquid cooling plate 10, and the liquid inlet section 111 corresponds to the first liquid inlet 12 in number. The liquid outlet section 112 is connected to the first liquid outlet 13, and the liquid outlet section 112 corresponds to the first liquid outlet 13 in number. Specifically, Fig.11 In the illustrated embodiment, the third partitions 15 correspond to the flow channels 11 in number. The third partitions 15 can separate the flow channel 11 into a liquid inlet section 111 and a liquid outlet section 112 connected at one end in the first direction X, thereby ensuring the smooth flow of the heat-conducting medium in the flow channel 11 and avoiding excessive mixing of the inlet and outlet liquids, thereby ensuring the heat conduction efficiency between the liquid cooling plate 10 and the battery cells.

[0074] In some embodiments, reference Fig.11 At least one fourth partition 16 is provided inside the liquid inlet section 111 of the flow channel 11. The fourth partition 16 extends along the first direction X. There are second gaps 161 between the opposite ends of the fourth partition 16 along the first direction X and the third surface 103 and the fourth surface 104, respectively. In other words, there is a second gap 161 between one end of the fourth partition 16 in the first direction X and the third surface 103, and there is a second gap 161 between the other end of the fourth partition 16 in the first direction X and the fourth surface 104. The fourth partition 16 divides the liquid inlet section 111 into at least two liquid inlet flow channels 1111 spaced apart along the second direction Y, and at least two liquid inlet flow channels 1111 are connected through the second gap 161. Specifically, Fig.11In the illustrated embodiment, the number of fourth partitions 16 in the liquid inlet section 111 is two, and the two fourth partitions 16 are arranged in the liquid inlet section 111 at intervals along the second direction Y to form three liquid inlet channels 1111 arranged in the liquid inlet section 111 at intervals along the second direction Y. The design of multiple liquid inlet channels 1111 in the liquid inlet section 111 can improve the uniformity of the flow of the heat-conducting medium in the liquid inlet section 111.

[0075] In some embodiments, reference Fig.11 At least one fourth partition 16 is provided inside the liquid outlet section 112 of the flow channel 11. The fourth partition 16 extends along the first direction X. There are second gaps 161 between the opposite ends of the fourth partition 16 along the first direction X and the third surface 103 and the fourth surface 104, respectively. In other words, there is a second gap 161 between one end of the fourth partition 16 in the first direction X and the third surface 103, and there is a second gap 161 between the other end of the fourth partition 16 in the first direction X and the fourth surface 104. The fourth partition 16 divides the liquid outlet section 112 into at least two liquid outlet channels 1121 spaced apart along the second direction Y, and at least two liquid outlet channels 1121 are connected through the second gap 161. Specifically, Fig.11 In the illustrated embodiment, the number of fourth partitions 16 in the liquid outlet section 112 is two, and the two fourth partitions 16 are arranged in the liquid outlet section 112 at intervals along the second direction Y to form three liquid outlet channels 1121 arranged in the liquid outlet section 112 at intervals along the second direction Y. The design of multiple liquid outlet channels 1121 in the liquid outlet section 112 can improve the uniformity of the flow of the heat-conducting medium in the liquid outlet section 112.

[0076] In some embodiments, reference Figure 2-Figure 3 , Figure 5 to Figure 11 as well as Fig.17 The battery pack 1 also includes a connecting member 70 and a fixing member 71, referring to Figure 3 The first end wall 61 of the box body 60 is provided with a mounting hole 611 penetrating the first end wall 61 along the third direction Z. Figure 1 and Figure 2 The liquid cooling plate 10 is disposed in the accommodating cavity 601 of the box body 60, and the liquid cooling plate 10 and the first end wall 61 of the box body 60 are spaced apart along the third direction Z. Figure 1-2 , Figure 4 , Figure 6 to Figure 8 as well as Figure 11 to Figure 13 The number of the liquid cooling plates 10 is at least two, and at least two liquid cooling plates 10 are arranged at intervals along the second direction Y. Figure 3-4 as well as Fig.10 In the embodiment shown, at least two liquid cooling plates 10 include a first liquid cooling plate 10a and a second liquid cooling plate 10b. Figure 3 , Figure 8 , Fig.10 and Fig.13, the second surfaces 102 of at least two liquid cooling plates 10 are respectively provided with grooves 1021 on two adjacent sides along the second direction Y. Specifically, the second surface 102 of the first liquid cooling plate 10a is provided with a groove 1021 on one side adjacent to the second liquid cooling plate 10b in the second direction Y, and the second surface 102 of the second liquid cooling plate 10b is provided with a first groove 1021 on one side adjacent to the first liquid cooling plate 10a in the second direction Y. Figure 3 The connecting member 70 is disposed between the first end wall 61 of the box body 60 and the liquid cooling plate 10, referring to Figure 3 and Fig.10 , the two ends of the connecting member 70 oppositely arranged along the second direction Y are respectively inserted into the groove 1021. Specifically, one end of the connecting member 70 in the second direction Y is inserted into the groove 1021 of the second surface 102 of the first liquid cooling plate 10a, and the other end of the connecting member 70 in the second direction Y is inserted into the groove 1021 of the second surface 102 of the second liquid cooling plate 10b. Figure 3 The fixing member 71 passes through the mounting hole 611 on the first end wall 61 along the third direction Z and is inserted into the connecting member 70 to fix at least two liquid cooling plates 10 to the first end wall 61. The matching design of the connecting member 70 and the fixing member 71 can fix two adjacent liquid cooling plates 10 in the second direction Y to the first end wall 61 of the box body 60, improve the installation stability between the liquid cooling plates 10 and the box body 60, and ensure the heat conduction efficiency between the battery cells of the liquid cooling plates 10.

[0077] In some embodiments, reference Figure 1 A support beam 602 is provided inside the box body 60 , and the support beam 602 extends along the first direction X. The first liquid cooling plate 10 a and the second liquid cooling plate 10 b are arranged on both sides of the support beam 602 in the second direction Y.

[0078] In some embodiments, reference Figure 3 , Fig.10 and Fig.17 The connecting member 70 includes a body 701 and two protrusions 702. The two protrusions 702 are arranged at intervals on a side of the body 701 away from the first end wall 61 in the third direction Z. The two protrusions 702 are arranged at intervals along the second direction Y. The body 701 is provided with a fixing hole 703 that passes through the body 701 along the third direction Z. Figure 3 The fixing hole 703 is connected to the mounting hole 611 along the third direction Z, and the fixing member 71 is inserted into the mounting hole 611 and the fixing hole 703 .

[0079] In some embodiments, the fixing member 71 is a screw or a bolt.

[0080] In some embodiments, reference Figures 4 to 8 , Fig.11 as well as Figure 18-19The liquid cooling plate 10 further includes a second blocking member 17 and a third blocking member 18, referring to Fig.11 and Fig.12 The third surface 103 of the liquid cooling plate 10 is provided with a first through hole 1031 communicating with the flow channel 11. Specifically, there are a plurality of first through holes 1031, which are arranged at intervals along the second direction Y. The liquid inlet section 111 and the liquid outlet section 112 of the flow channel 11 are respectively communicated with the first through holes 1031, and the second gaps 161 adjacent to the third surface 103 in the first direction X are respectively communicated with the first through holes 1031. Fig.11 and Fig.13 The fourth surface 104 of the liquid cooling plate 10 is provided with a second through hole 1041 communicating with the flow channel 11. Specifically, the number of the second through holes 1041 is multiple and is arranged at intervals along the second direction Y. The first gap 151 and the second gap 161 adjacent to the fourth surface 104 in the first direction X are respectively communicated with the second through holes 1041. Figures 4 to 8 as well as Fig.11 The second blocking member 17 is inserted into the first through hole 1031 to block the third surface 103, and the third blocking member 18 is inserted into the second through hole 1041 to block the fourth surface 104. The second blocking member 17 and the third blocking member 18 are arranged to block the two opposite ends of the liquid cooling plate 10 in the first direction X, thereby ensuring the sealing of the liquid cooling plate 10, and further ensuring the heat conduction efficiency between the liquid cooling plate 10 and the battery cell. Moreover, the liquid cooling plate 10 only needs to insert the second blocking member 17 and the third blocking member 18 at both ends after the overall molding to achieve the overall sealing of the liquid cooling plate 10, and the manufacturing process is simple and the manufacturing cost is low.

[0081] In some embodiments, the liquid cooling plate 10 is formed by a profile extrusion process. Specifically, the liquid cooling plate 10 is made by an aluminum extrusion profile processing process, which has a simple manufacturing process and a low manufacturing cost. After the liquid cooling plate 10 is formed, a second sealing member 17 and a third sealing member 18 are inserted at opposite ends in the first direction X to achieve overall sealing of the liquid cooling plate 10.

[0082] In some embodiments, reference Fig.18 The second blocking member 17 is provided with a first blocking portion 171 , and the number of the first blocking portions 171 is multiple. The second blocking member 17 extends along the second direction Y, and the multiple first blocking portions 171 are arranged at intervals along the second direction Y. The first blocking portions 171 correspond to the first through holes 1031 in number.

[0083] In some embodiments, reference Fig.19 The third blocking member 18 is provided with a second blocking portion 181, and the number of the second blocking portions 181 is multiple. The third blocking member 18 extends along the second direction Y, and the multiple second blocking portions 181 are arranged at intervals along the second direction Y. The second blocking portions 181 correspond to the second through holes 1041 in number.

[0084] In some embodiments, reference Figure 4 , Figure 6 , Fig. 9 as well as Fig.14 and Fig.15 The current collecting member 20 includes a third wall 23 and a fourth wall 24 arranged opposite to each other along the second direction Y, referring to Figure 4 The current collecting member 20 also includes a fourth blocking member 25, referring to Figure 6 The current collecting member 20 also includes a fifth blocking member 26, referring to Fig.14 The third wall 23 is provided with a third through hole 231 communicating with the first chamber 201 and a fourth through hole 232 communicating with the second chamber 202. Fig.15 The fourth wall 24 is provided with a fifth through hole 241 communicating with the first chamber 201 and a sixth through hole 242 communicating with the second chamber 202. Figure 4 A fourth blocking member 25 is inserted into the third through hole 231 and the fourth through hole 232, respectively. Figure 6 , a fifth blocking member 26 is inserted into the fifth through hole 241 and the sixth through hole 242, respectively. The fourth blocking member 25 and the fifth blocking member 26 are provided to block the two opposite ends of the current collecting member 20 in the second direction Y, thereby ensuring the sealing of the current collecting member 20, and further ensuring the sealing between the current collecting member 20 and the liquid cooling plate 10. Moreover, the current collecting member 20 only needs to be provided with the fourth blocking member 25 and the fifth blocking member 26 at both ends after the overall molding, so that the overall sealing of the current collecting member 20 can be achieved, and the manufacturing process is simple and the manufacturing cost is low.

[0085] In some embodiments, the current collecting component 20 is formed by a profile extrusion process. Specifically, the current collecting component 20 is made by an aluminum extrusion profile processing process, which has a simple manufacturing process and a low manufacturing cost. The fourth sealing component 25 and the fifth sealing component 26 are inserted at the opposite ends of the formed current collecting component 20 in the second direction Y to achieve overall sealing of the current collecting component 20.

[0086] On the other hand, the utility model further provides an electrical device, including a battery pack as described in any of the above embodiments, and the electrical device can be an electric car, electrical equipment, etc.

[0087] The technical solutions provided by the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the present invention are explained in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, the battery pack having a first direction (X) and a third direction (Z) intersecting each other, characterized in that: The battery pack comprises: A liquid cooling plate (10), wherein a flow channel (11) for a heat-conducting medium to flow is provided inside the liquid cooling plate (10), the flow channel (11) extending along the first direction (X), the liquid cooling plate (10) comprising a first surface (101) and a second surface (102) arranged opposite to each other along the third direction (Z), the first surface (101) being provided with a first liquid inlet (12) and a first liquid outlet (13) respectively connected to the flow channel (11); A current collecting member (20) is arranged on the first surface (101), wherein a first chamber (201) and a second chamber (202) are arranged in the interior of the current collecting member (20) and are arranged at intervals along the first direction (X), and the current collecting member (20) comprises a first wall (21) and a second wall (22) which are arranged opposite to each other along the third direction (Z); The first wall (21) is in contact with the first surface (101); a second liquid inlet (211) communicating with the first chamber (201) and a second liquid outlet (212) communicating with the second chamber (202) are formed on the first wall (21); the second liquid inlet (211) is in communication with the first liquid inlet (12); and the second liquid outlet (212) is in communication with the first liquid outlet (13); The second wall (22) is provided with an opening (220), the first chamber (201) and the second chamber (202) are respectively connected to the opening (220), and the second liquid inlet (211) and the second liquid outlet (212) are respectively arranged opposite to the opening (220) along the third direction (Z), so that the first wall (21) located at the periphery of the second liquid inlet (211) is sealedly connected to the first surface (101) through the opening (220), and the first wall (21) located at the periphery of the second liquid outlet (212) is sealedly connected to the first surface (101) through the opening (220); A first blocking member (30) is sealingly connected to the opening (220).

2. The battery pack according to claim 1, characterized in that: The opening (220) comprises a first opening (221) and a second opening (222), the first opening (221) being in communication with the first chamber (201), and the second opening (222) being in communication with the second chamber (202); The first opening (221) and the second liquid inlet (211) are arranged opposite to each other along the third direction (Z), so that the first wall (21) located at the periphery of the second liquid inlet (211) and the first surface (101) located at the periphery of the first liquid inlet (12) are sealed and connected through the first opening (221); The second opening (222) and the second liquid outlet (212) are arranged opposite to each other along the third direction (Z), so that the first wall (21) located at the periphery of the second liquid outlet (212) and the first surface (101) located at the periphery of the first liquid outlet (13) are sealed and connected via the second opening (222).

3. The battery pack according to claim 1, wherein: The battery pack further comprises a liquid inlet pipe (40) and a liquid outlet pipe (50); The second wall (22) is provided with a liquid inlet port (223) connected to the first chamber (201) and a liquid outlet port (224) connected to the second chamber (202); the liquid inlet pipe (40) is inserted into the liquid inlet port (223) to provide a heat-conducting medium to the first chamber (201); and the liquid outlet pipe (50) is inserted into the liquid outlet port (224) to discharge the heat-conducting medium in the second chamber (202).

4. The battery pack according to claim 3, characterized in that: The battery pack further has a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other; A cavity (200) is provided inside the current collecting member (20), a first partition (203) is provided inside the cavity (200), and the first partition (203) extends along the second direction (Y) to separate the cavity (200) into the first chamber (201) and the second chamber (202); Alternatively, the number of the current collecting parts (20) is two, and the two current collecting parts (20) are arranged on the first surface (101) at intervals along the first direction (X), one of the current collecting parts (20) is provided with the first chamber (201) inside, and the other of the current collecting parts (20) is provided with the second chamber (202) inside.

5. The battery pack according to claim 1, wherein: The battery pack further has a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other; The liquid cooling plate (10) comprises a third surface (103) and a fourth surface (104) arranged opposite to each other along the first direction (X); At least one second partition (14) is provided inside the liquid cooling plate (10), and the second partition (14) extends along the first direction (X). The opposite ends of the second partition (14) along the first direction (X) are respectively connected to the third surface (103) and the fourth surface (104), so as to form at least two flow channels (11) spaced apart along the second direction (Y) inside the liquid cooling plate (10).

6. The battery pack according to claim 5, characterized in that: A third partition (15) is provided inside the flow channel (11), and the third partition (15) extends along the first direction (X). One end of the third partition (15) along the first direction (X) is connected to the third surface (103), and a first gap (151) exists between the other end and the fourth surface (104); The third partition plate (15) divides the flow channel (11) into a liquid inlet section (111) and a liquid outlet section (112) arranged at intervals along the second direction (Y); the liquid inlet section (111) and the liquid outlet section (112) are connected via the first gap (151); The liquid inlet section (111) is in communication with the first liquid inlet (12), and the liquid outlet section (112) is in communication with the first liquid outlet (13).

7. The battery pack according to claim 6, characterized in that: At least one fourth partition (16) is provided inside the liquid inlet section (111), the fourth partition (16) extends along the first direction (X), and second gaps (161) are respectively provided between the opposite ends of the fourth partition (16) along the first direction (X) and the third surface (103) and the fourth surface (104), the fourth partition (16) divides the liquid inlet section (111) into at least two liquid inlet channels (1111) spaced apart along the second direction (Y), and at least two of the liquid inlet channels (1111) are connected via the second gap (161); And / or, at least one fourth partition (16) is provided inside the liquid outlet section (112), the fourth partition (16) extends along the first direction (X), and second gaps (161) are respectively provided between the opposite ends of the fourth partition (16) along the first direction (X) and the third surface (103) and the fourth surface (104), the fourth partition (16) divides the liquid outlet section (112) into at least two liquid outlet channels (1121) spaced apart along the second direction (Y), and at least two of the liquid outlet channels (1121) are connected via the second gap (161).

8. The battery pack according to claim 1, wherein: The battery pack further has a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other; The battery pack further comprises a box (60), a connecting member (70) and a fixing member (71); a receiving chamber (601) is provided inside the box (60); the box (60) comprises a first end wall (61) and a second end wall (62) which are arranged opposite to each other along the third direction (Z); a mounting hole (611) is provided on the first end wall (61) and passes through the first end wall (61) along the third direction (Z); The liquid cooling plate (10) is arranged in the accommodating cavity (601), and the liquid cooling plate (10) and the first end wall (61) are arranged at intervals along the third direction (Z); The number of the liquid cooling plates (10) is at least two, at least two of the liquid cooling plates (10) are arranged at intervals along the second direction (Y), and grooves (1021) are respectively provided on two adjacent sides of the second surfaces (102) of at least two of the liquid cooling plates (10) along the second direction (Y); The connecting member (70) is arranged between the first end wall (61) and the liquid cooling plate (10), and the two opposite ends of the connecting member (70) along the second direction (Y) are respectively inserted into the groove (1021), and the fixing member (71) passes through the mounting hole (611) along the third direction (Z) and is inserted into the connecting member (70) to fix at least two of the liquid cooling plates (10) to the first end wall (61).

9. The battery pack according to claim 8, characterized in that: The connecting member (70) comprises a body (701) and two protrusions (702), the two protrusions (702) being arranged at intervals on a side of the body (701) facing away from the first end wall (61) in the third direction (Z), the two protrusions (702) being arranged at intervals along the second direction (Y), and the protrusions (702) being inserted into the groove (1021); The main body (701) is provided with a fixing hole (703) which passes through the main body (701) along the third direction (Z); the fixing hole (703) is connected to the mounting hole (611) along the third direction (Z); and the fixing member (71) is inserted into the mounting hole (611) and the fixing hole (703).

10. The battery pack according to claim 1, wherein: The liquid cooling plate (10) further comprises a second blocking member (17) and a third blocking member (18); The liquid cooling plate (10) comprises a third surface (103) and a fourth surface (104) arranged opposite to each other along the first direction (X); the third surface (103) is provided with a first through hole (1031) communicating with the flow channel (11); and the fourth surface (104) is provided with a second through hole (1041) communicating with the flow channel (11); The second blocking member (17) is inserted into the first through hole (1031) to block the third surface (103), and the third blocking member (18) is inserted into the second through hole (1041) to block the fourth surface (104).

11. The battery pack according to claim 1, wherein: The battery pack further has a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other; The current collecting member (20) comprises a third wall (23) and a fourth wall (24) arranged opposite to each other along the second direction (Y), and the current collecting member (20) further comprises a fourth blocking member (25) and a fifth blocking member (26); The third wall (23) is provided with a third through hole (231) communicating with the first chamber (201) and a fourth through hole (232) communicating with the second chamber (202); the fourth wall (24) is provided with a fifth through hole (241) communicating with the first chamber (201) and a sixth through hole (242) communicating with the second chamber (202); The fourth blocking member (25) is inserted into the third through hole (231) and the fourth through hole (232), respectively, and the fifth blocking member (26) is inserted into the fifth through hole (241) and the sixth through hole (242), respectively.

12. An electrical device, characterized in that: The invention comprises a battery pack as claimed in any one of claims 1 to 11.

Images