Battery pack and electric device

Abstract

According to the battery pack, a liquid cooling plate is arranged on one side of a battery pack in a third direction, first end faces of battery monomers in the battery pack face the liquid cooling plate in the third direction and are in direct contact with the liquid cooling plate, terminals are arranged on the first end faces, through holes are formed in the liquid cooling plate, and the through holes are formed in the liquid cooling plate; the terminals of the single batteries are exposed out of the through holes, busbars in the CCS assembly are arranged on one surface, deviating from the battery pack, of the liquid cooling plate, the busbars are in direct contact with one surface, deviating from the battery pack, of the liquid cooling plate, and the busbars are electrically connected with the terminals of the single batteries, so that the electric connection between the busbars and the single batteries is ensured; according to the battery pack, the busbar is cooled through the liquid cooling plate, and the liquid cooling plate can also cool the first end face of the battery monomer, so that the temperatures of the battery monomer and the busbar connected with the battery monomer are effectively controlled, the CCS assembly is enabled to be at a proper working temperature, the data acquisition precision of the CCS assembly is improved, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Art

[0002] The CCS component (integrated busbar) in the battery pack is usually arranged between the battery group and the cover plate to collect relevant data such as the temperature and voltage of the battery cells in the battery pack. The bus in the CCS component is electrically connected to the terminals of the battery cells. During the recycling of the battery cells, a large amount of heat will be generated in the connection area between the bus and the terminal. In addition, the space between the CCS component and the battery pack is small, and heat is easily accumulated. Long-term use will affect the data collection accuracy of the CCS component and even damage the CCS component, affecting the service life 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 heat between the CCS component and the battery group in the current battery pack cannot be dissipated in time, resulting in a decrease in the collection accuracy of the CCS component.

[0004] A first aspect of an embodiment of the present application provides a battery pack, which has a first direction and a third direction intersecting each other, and the battery pack includes: a battery group, including a plurality of battery cells, the battery cells having a first end face, and a terminal is arranged on the first end face; a liquid cooling plate, arranged on one side of the battery pack in the third direction, along the third direction, the first end face faces the liquid cooling plate and is in direct contact with the liquid cooling plate, a flow channel is arranged inside the liquid cooling plate, the flow channel extends along the first direction, a through hole is opened on the liquid cooling plate and passes through the liquid cooling plate along the third direction, the flow channel is arranged at intervals from the through hole, and the terminal is exposed from the through hole; a CCS assembly, including: a bus, at least a part of the bus is arranged on a side of the liquid cooling plate away from the battery pack in the third direction, the bus is in direct contact with the liquid cooling plate, and the bus is electrically connected to the terminal.

[0005] Optionally, the liquid cooling plate includes a first plate and a second plate stacked along the third direction; the first plate is in direct contact with the first end face; the second plate is provided with a groove on a side facing the first plate in the third direction, and the first plate and the second plate are stacked and covered on the groove to define the flow channel inside the groove.

[0006] Optionally, there are multiple buses, and the multiple buses are arranged at intervals along the first direction; the bus includes a main body and a connecting arm, and the main body and the connecting arm are connected; along the third direction, the main body and the liquid cooling plate are arranged at intervals, and the connecting arm is in direct contact with the part of the liquid cooling plate where the flow channel is set.

[0007] Optionally, the busbar also includes a first connecting end and a second connecting end arranged opposite to each other along the first direction, the first connecting end and the second connecting end are respectively connected to the main body; the terminal includes a positive terminal and a negative terminal, the negative terminal surrounds the positive terminal along the circumferential direction of the positive terminal; the positive terminal is protrudingly arranged on the first end surface, the positive terminal is inserted into the through hole, and the negative terminal is arranged on the first end surface, at least a portion of the negative terminal is exposed from the through hole, and the liquid cooling plate is in direct contact with the negative terminal; of the two battery cells adjacent to each other along the first direction, the first connecting end is electrically connected to the positive terminal of one of the battery cells, and the second connecting end passes through the through hole and is electrically connected to the negative terminal of the other battery cell.

[0008] Optionally, the CCS component also includes a first output row and a second output row; along the first direction, the first output row is arranged at one end of the liquid cooling plate, the second output row is arranged at the other end of the liquid cooling plate, and the bus is arranged between the first output row and the second output row; the first output row includes a first connecting row and a first connecting plate stacked along the third direction, and the first connecting row is in direct contact with the liquid cooling plate on a side facing away from the first connecting plate in the third direction; and / or the second output row includes a second connecting row and a second connecting plate stacked along the third direction, and the second connecting row is in direct contact with the liquid cooling plate on a side facing away from the second connecting plate in the third direction.

[0009] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction intersect with each other; the first connecting piece extends along the second direction, and one end of the first connecting piece in the second direction is bent toward the liquid cooling plate to form a first bending portion, and the first bending portion extends along the third direction, and the first bending portion is bent away from the first connecting row at one end in the third direction to form a first connecting portion, and the first connecting portion extends along the second direction; and / or, the second connecting piece extends along the second direction, and one end of the second connecting piece in the second direction is bent toward the liquid cooling plate to form a second bending portion, and the second bending portion extends along the third direction, and the second bending portion is bent away from the second connecting row at one end in the third direction to form a second connecting portion, and the second connecting portion extends along the second direction.

[0010] Optionally, the CCS component further includes a signal acquisition component; the signal acquisition component is arranged on a side of the bus bar facing away from the liquid cooling plate in the third direction; along the third direction, the signal acquisition component is in direct contact with the bus bar, and the signal acquisition component is spaced apart from the liquid cooling plate; an avoidance hole is opened on the signal acquisition component and passes through the signal acquisition component along the third direction, and the avoidance hole and the through hole are arranged opposite to each other along the third direction.

[0011] Optionally, the CCS component also includes a connector, which includes a mounting plate and a socket, wherein the mounting plate is arranged on the side of the first output row away from the bus in the first direction, and the socket is arranged on the mounting plate; one end of the signal acquisition component in the first direction is bent toward the direction close to the liquid cooling plate to form a third bending portion, and the third bending portion extends along the third direction, and the third bending portion is connected to the mounting plate.

[0012] Optionally, the battery pack also includes a box body, which includes two side walls arranged opposite to each other along the first direction, and a liquid inlet and a liquid outlet are spaced apart on one of the side walls; the liquid cooling plate also includes a liquid inlet joint and a liquid outlet joint, and the liquid inlet joint and the liquid outlet joint are respectively connected to the flow channel; along the first direction, the liquid inlet joint and the liquid outlet joint are respectively arranged at two ends of the liquid cooling plate, or, the liquid inlet joint and the liquid outlet joint are arranged at the same end of the liquid cooling plate; the liquid inlet joint is connected to the liquid inlet, and the liquid outlet joint is connected to the liquid outlet.

[0013] A second aspect of an embodiment of the present application provides an electrical device, comprising the battery pack as described above.

[0014] In summary, the embodiment of the present application provides a battery pack and an electrical device having the battery pack, wherein the battery pack is provided with a liquid cooling plate on one side of the battery pack in a third direction, and the first end face of the battery cell in the battery pack faces the liquid cooling plate in the third direction and directly contacts the liquid cooling plate. A terminal is provided on the first end face, and a through hole penetrating the liquid cooling plate is provided on the liquid cooling plate so that the terminal of the battery cell is exposed from the through hole, and a bus bar in the CCS assembly is provided on the side of the liquid cooling plate away from the battery pack, and the bus bar is in direct contact with the side of the liquid cooling plate away from the battery pack, and the bus bar is electrically connected to the terminal of the battery cell, thereby ensuring that the bus bar is electrically connected to the battery cell, while directly cooling the bus bar through the liquid cooling plate, and the liquid cooling plate can also directly cool the first end face of the battery cell, effectively controlling the temperature of the battery cell and the bus bar connected thereto, so that the CCS assembly is at a suitable operating temperature, improving the data acquisition accuracy of the CCS assembly, and improving the service life of the battery pack. In addition, the bus is placed directly on the liquid cooling plate, which can support the bus. There is no need to use additional supporting parts to support the bus, which reduces the manufacturing cost and assembly difficulty of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0017] Figure 2 It is a schematic diagram of the combined structure of the battery pack, the liquid cooling plate and the CCS assembly in the battery pack provided in the embodiment of the present application;

[0018] Figure 3 yes Figure 2 Partial exploded view;

[0019] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at point A;

[0020] Figure 5 is a schematic diagram of the structure of a battery pack in a battery pack provided in an embodiment of the present application;

[0021] Figure 6 It is a schematic diagram of the combined structure of the liquid cooling plate and the CCS assembly in the battery pack provided in the embodiment of the present application;

[0022] Figure 7 yes Figure 6 Partial exploded view;

[0023] Figure 8 is a schematic diagram of the structure of a liquid cooling plate in a battery pack provided in an embodiment of the present application;

[0024] Fig. 9 yes Figure 8 BB section view;

[0025] Fig.10 yes Fig. 9 A schematic diagram of the enlarged structure at C;

[0026] Fig.11 yes Figure 8 Partial exploded view;

[0027] Fig.12 is a schematic diagram of the structure of a bus bar in a battery pack provided in an embodiment of the present application;

[0028] Fig.13 is a schematic diagram of the exploded structure of the first output row in the battery pack provided in an embodiment of the present application;

[0029] Fig.14 is a schematic diagram of the exploded structure of the second output row in the battery pack provided in an embodiment of the present application;

[0030] Fig.15 It is a schematic diagram of the combined structure of the signal acquisition component and the connector in the battery pack provided in the embodiment of the present application;

[0031] Fig.16 yes Fig.15 A schematic diagram of the structure at F of FIG.

[0032] Fig.17 It is a schematic diagram of the structure of a battery cell in a battery pack provided in an embodiment of the present application.

[0033] Description of main reference numerals:

[0034] 1. Battery pack;

[0035] 10. Battery pack, 10a. First side, 10b. Second side, 11. Battery cell, 110. Main body, 111. First end surface, 112. Second end surface, 12. Terminal, 121. Positive terminal, 122. Negative terminal;

[0036] 20, liquid cooling plate, 20a, first end, 20b, second end, 201, flow channel, 21, through hole, 22, first layer plate, 23, second layer plate, 231, groove, 24, liquid inlet connector, 25, liquid outlet connector;

[0037] 30.CCS components;

[0038] 31. busbar, 310. body, 311. first connection end, 312. second connection end, 313. connection arm;

[0039] 32. first output row, 321. third connection end, 322. first connection row, 323. first connection sheet, 3231. first bending portion, 3232. first connection portion;

[0040] 33. second output row, 331. fourth connection end, 332. second connection row, 333. second connection sheet, 3331. second bending portion, 3332. second connection portion;

[0041] 34. signal collection member, 341. avoidance hole, 342. third bending portion;

[0042] 35. Connector, 351. Mounting plate, 352. Socket;

[0043] 40, box body, 41, side wall, 411, liquid inlet, 412, liquid outlet;

[0044] X, first direction, Y, second direction, Z, third direction. DETAILED DESCRIPTION

[0045] 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.

[0046] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, 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.

[0047] 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.

[0048] 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.

[0049] 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%.

[0050] 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.

[0051] In some embodiments of the present application, a battery pack 1 is provided, referring to Figure 2 to Figure 17 The battery pack 1 includes: a battery pack 10, a liquid cooling plate 20 and a CCS assembly 30. Figure 1 The battery pack 1 includes a box body 40, the box body 40 has a receiving cavity inside, and the battery pack 10, the liquid cooling plate 20 and the CCS assembly 30 are respectively arranged in the receiving cavity of the box body 40. The battery pack 1 has a first direction X, a second direction Y and a third direction Z that intersect each other. Figure 1 to Figure 4In the illustrated embodiment, the first direction X, the second direction Y and the third direction Z are orthogonal to each other. The first direction X is the length direction of the box body 40 , the second direction Y is the width direction of the box body 40 , and the third direction Z is the height direction of the box body 40 .

[0052] Reference Figure 2 to Figure 5 The battery pack 10 includes a plurality of battery cells 11, and the plurality of battery cells 11 are arranged along a first direction X and a second direction Y to form the battery pack 10. Fig.17 The battery cell 11 has a first end surface 111. Figure 5 In the illustrated embodiment, the battery pack 10 as a whole has a first surface 10a and a second surface 10b arranged opposite to each other along a third direction Z, and the first end surface 111 of the battery cell 11 is adjacent to the first surface 10a in the third direction Z, or the first end surface 111 is coplanar with the first surface 10a.

[0053] Reference Figure 2 to Figure 4 as well as Figure 6 to Figure 11 The liquid cooling plate 20 is disposed on one side of the battery pack 10 in the third direction Z, referring to Figure 9-10 , a flow channel 201 is provided inside the liquid cooling plate 20, and the flow channel 201 extends along the first direction X, referring to Figure 4 as well as Figure 7 to Figure 10 The liquid cooling plate 20 is provided with a through hole 21 penetrating the liquid cooling plate 20 along the third direction Z, and the through hole 21 and the flow channel 201 are arranged at intervals along the second direction Y. A plurality of through holes 21 arranged at intervals along the first direction X are arranged between two adjacent flow channels 201 in the second direction Y, and the terminals 12 on the battery cells 11 are exposed from the through holes 21. The first end face 111 of the battery cell 11 faces the liquid cooling plate 20 in the third direction Z, and the first end face 111 of the battery cell 11 is in direct and insulated contact with the liquid cooling plate 20. Specifically, the liquid cooling plate 20 is arranged on the first surface 10a of the battery pack 10, and when the first end face 111 is coplanar with the first surface 10a, the liquid cooling plate 20 is in direct and insulated contact with the first end face 111 of the battery cell 11, so as to adjust the temperature of the battery cells 11 in the battery pack 10. Among them, the through holes 21 on the liquid cooling plate 20 correspond to the battery cells 11 in the battery pack 10 in number.

[0054] Reference Figure 2 to Figure 4 as well as Figure 6-7 The CCS assembly 30 includes a bus bar 31 , which is disposed on a side of the liquid cooling plate 20 away from the battery pack 10 in the third direction Z. The bus bar 31 is in direct and insulated contact with the liquid cooling plate 20 , and is electrically connected to the terminal 12 on the battery cell 11 .

[0055] The busbar in the CCS component (integrated busbar) in the battery pack is electrically connected to the terminals of the battery cells to collect relevant data such as the temperature and voltage of the battery cells in the battery pack. During the recycling of the battery cells, a large amount of heat will be generated in the connection area between the busbar and the terminal. The space between the CCS component and the battery pack in the height direction of the battery pack is narrow, and heat is easy to accumulate. Long-term use will affect the data collection accuracy of the CCS component and even damage the CCS component, affecting the service life of the battery pack.

[0056] The battery pack 1 provided in the embodiment of the present application is provided with a liquid cooling plate 20 on one side of the battery pack 10 in the third direction Z, and a through hole 21 is provided on the liquid cooling plate 20 to penetrate the liquid cooling plate 20 in the third direction Z. The first end surface 111 of the battery cell 11 in the battery pack 10 faces the liquid cooling plate 20 and is in direct and insulated contact with the liquid cooling plate 20, and the terminal 12 on the battery cell 11 is exposed from the through hole 21, and the bus bar 31 in the CCS assembly 30 is provided on the side of the liquid cooling plate 20 away from the battery pack 10 in the third direction Z. The bus bar 31 is in direct and insulated contact with the liquid cooling plate 20, and the bus bar 31 is electrically connected to the terminal 12 of the battery cell 11, so that the bus bar 31 is cooled by the liquid cooling plate 20 while ensuring the electrical connection between the bus bar 31 and the battery cell 11, and the liquid cooling plate 20 can also cool the first end surface 111 of the battery cell 11. In the case of high-rate charge and discharge of the battery cell, the bus 31 will emit a large amount of heat. The direct contact between the liquid cooling plate 20 and the bus 31 can take away a large amount of heat, thereby achieving the liquid cooling effect of the bus 31, ensuring that the battery cell 11 is at a suitable operating temperature, and adjusting and controlling the temperature of the connection area between the bus 31 and the terminal 12 of the battery cell 11, avoiding the heat accumulation at the connection between the terminal 12 and the bus 31 of the battery cell 11 during the cycle process, effectively controlling the temperature of the battery cell 11 and the bus 31 connected to it, so that the CCS component 30 is at a suitable operating temperature, improving the data collection accuracy of the CCS component 30, and improving the service life of the battery pack 1. In addition, the bus 31 is directly placed on the liquid cooling plate 20, and the liquid cooling plate 20 can form a support for the bus 31, without the need to use additional support members to support the bus 31, reducing the manufacturing cost and assembly difficulty of the battery pack.

[0057] In some embodiments, reference Figure 4 as well as Figures 9 to 11 The liquid cooling plate 20 includes a first plate 22 and a second plate 23 stacked along a third direction Z, referring to Figure 4 The first layer plate 22 is in direct and insulated contact with the first end surface 111 of the battery cell 11. Fig.10The second layer plate 23 is provided with a groove 231 on one side facing the first layer plate 22 in the third direction Z. The groove 231 extends along the first direction X. The first layer plate 22 and the second layer plate 23 are stacked along the third direction Z. The first layer plate 22 covers the groove 231 to define a flow channel 201 inside the groove 231. Fig. 9 and Fig.10 In the illustrated embodiment, the groove 231 is provided on the second layer plate 23, so that a convex structure is formed on a side of the second layer plate 23 facing away from the first layer plate 22 in the third direction Z, and the convex structure extends along the first direction X, and the first layer plate 22 covers the open end of the groove 231 to form a flow channel 201 inside the groove 231. The structural design of the first layer plate 22 and the second layer plate 23 stacked along the third direction Z can form the first layer plate 22 and the second layer plate 23 separately during the manufacturing process of the liquid cooling plate 20, thereby improving the manufacturing efficiency of the liquid cooling plate 20 and reducing the manufacturing cost, and the groove 231 is provided on the second layer plate 23 to cooperate with the first layer plate 22 to form the flow channel 201, which can ensure the flatness of the first layer plate 22, thereby ensuring the direct contact area between the first layer plate 22 and the first end surface 111 of the battery cell 11, and ensuring the control effect of the liquid cooling plate 20 on the battery cell 11.

[0058] In some embodiments, the first layer 22 and the second layer 23 are respectively made of plastic materials, such as PA12 plastic, so that the liquid cooling plate 20 has good insulation properties, avoiding short circuit between the bus 31 and the battery cell 11 due to the liquid cooling plate 20, and ensuring the service life of the battery pack 10. The first layer 22 and the second layer 23 can be connected into an integrated structure by gluing.

[0059] In some embodiments, the first layer 22 and the second layer 23 can be made of metal, such as aluminum. After the insulating coating is sprayed on the surfaces of the first layer 22 and the second layer 23 or the insulating film is adhered to the surfaces of the first layer 22 and the second layer 23, the first layer 22 and the second layer 23 are laser welded into an integrated structure.

[0060] In some embodiments, reference Figure 7 and Fig.11 The liquid cooling plate 20 further includes a liquid inlet joint 24 and a liquid outlet joint 25. The liquid inlet joint 24 is disposed at one end of the liquid cooling plate 20 in the first direction X. The liquid inlet joint 24 is inserted into the first layer plate 22 and communicates with the internal flow channel 201 of the liquid cooling plate 20. The liquid outlet joint 25 is disposed at the other end of the liquid cooling plate 20 in the first direction X. The liquid outlet joint 25 is inserted into the first layer plate 22 and communicates with the internal flow channel 201 of the liquid cooling plate 20 to realize the flow and circulation of the heat transfer medium in the liquid cooling plate 20. In some other implementations, the liquid inlet joint 24 and the liquid outlet joint 25 are disposed at the same end of the liquid cooling plate 20 in the first direction X.

[0061] In some embodiments, reference Figure 3-4 , Figure 7 as well as Fig.12 The number of the busbars 31 is multiple, and the multiple busbars 31 are arranged at intervals along the first direction X. Along the first direction X, two adjacent busbars 31 are arranged at intervals. The busbar 31 includes a body 310 and a connecting arm 313. Each busbar 31 includes a plurality of bodies 310. Figure 3-4 , Figure 7 as well as Fig.12 In the illustrated embodiment, each busbar 31 includes four bodies 310, which are arranged at intervals along the second direction Y, and two adjacent bodies 310 are connected by a connecting arm 313. Along the third direction Z, the bodies 310 are arranged at intervals with the liquid cooling plate 20, and the connecting arm 313 is in direct and insulated contact with the portion of the liquid cooling plate 20 where the flow channel 201 is arranged. Figure 4 , Fig. 9 and Fig.10 In the embodiment shown, due to the opening of the groove 231 on the second plate 23 of the liquid cooling plate 20, a convex structure is formed on the side of the second plate 23 facing away from the first plate 22 in the third direction Z. Figure 4 In the embodiment shown, the protruding structure supports the connecting arm 313, that is, the connecting arm 313 is in direct and insulated contact with the second layer plate 23 of the liquid cooling plate 20, and the main body 310 in the busbar 31 is spaced apart from the second layer plate 23 of the liquid cooling plate 20 along the third direction Z, so that the main body 310 is electrically connected to the terminal 12 of the battery cell 11, while maintaining the spacing with the first end surface 111 of the battery cell 11 in the third direction Z, so as to avoid the heat accumulation caused by the small spacing between the busbar 31 and the battery cell 11 in the third direction Z. The liquid cooling plate 20 helps to adjust and control the temperature of the busbar 31 through the setting of the connecting arm 313. Among them, the busbar 31 is a metal sheet that is conductive and easy to transmit signals, such as aluminum alloy, copper sheet, nickel sheet, etc., and the material of the connecting arm 313 connecting two adjacent busbars 31 is aluminum alloy, copper sheet, nickel sheet, etc.

[0062] In some embodiments, reference Figure 4 and Fig.17 The terminal 12 on the battery cell 11 includes a positive terminal 121 and a negative terminal 122. The negative terminal 122 surrounds the positive terminal 121 along the circumferential direction of the positive terminal 121. The positive terminal 121 is protrudingly arranged on the first end surface 111 of the battery cell 11, and the negative terminal 122 is arranged on the first end surface 111 of the battery cell 11. Fig.17In the embodiment shown, the battery cell 11 is a cylindrical battery, and the battery cell 11 includes a main body 110 and a terminal 12. The main body 110 includes a first end face 111 and a second end face 112 arranged opposite to each other along a third direction Z. The first end face 111 of the main body 110 is the first end face 111 of the battery cell 11, and the negative terminal 122 of the terminal 12 is arranged on the first end face 111. Figure 4 The positive terminal 121 is inserted into the through hole 21 of the liquid cooling plate 20, and part of the negative terminal 122 is exposed from the through hole of the liquid cooling plate 20. The liquid cooling plate 20 is in direct and insulated contact with the negative terminal 122, thereby controlling the temperature of the battery cell 11 and maintaining the battery cell 11 at a suitable operating temperature.

[0063] In some embodiments, reference Figure 4 and Fig.12 The busbar 31 further includes a first connection end 311 and a second connection end 312 disposed opposite to each other along the first direction X. The first connection end 311 and the second connection end 312 are respectively connected to the body 310. Figure 4 In two battery cells 11 adjacent to each other along the first direction X, the first connection end 311 of the busbar 31 is electrically connected to the positive terminal 121 of one battery cell 11, and the second connection end 312 passes through the through hole 21 and is electrically connected to the negative terminal 122 of the other battery cell 11, as shown in FIG. Figure 4 In the illustrated embodiment, the second connection end 312 of the bus 31 is bent along the third direction Z in a direction close to the battery cell 11 to pass through the through hole 21 and be electrically connected to the negative terminal 122. The first connection end 311 is provided with a connection hole that passes through the bus 31 along the third direction Z. The first connection end 311 is sleeved on the positive terminal 121 through the connection hole to be electrically connected to the positive terminal 121. The second connection end 312 is arc-shaped, the second connection end 312 abuts against the negative terminal 122 along the third direction Z, and the second connection end 312 surrounds the positive terminal 121 along the circumferential direction of the positive terminal 121.

[0064] In some embodiments, reference Figure 4 , along the first direction X, the body 310 between the first connection end 311 and the second connection end 312 and the second layer plate 23 of the liquid cooling plate 20 are spaced apart in the third direction Z. In other implementations, along the first direction X, the body 310 between the first connection end 311 and the second connection end 312 is in direct contact with the second layer plate 23 of the liquid cooling plate 20.

[0065] In some embodiments, reference Figure 3 , Figure 6-7 as well as Figure 13-14 The CCS assembly also includes a first output row 32 and a second output row 33, referring to Figure 3 as well as Figure 6-7, along the first direction X, the first output row 32 is disposed at one end of the liquid cooling plate 20, the second output row 33 is disposed at the other end of the liquid cooling plate 20, and the bus bar 31 is disposed between the first output row 32 and the second output row 33. Figure 8 In the illustrated embodiment, the liquid cooling plate 20 includes a first end 20 a and a second end 20 b disposed opposite to each other along a first direction X, a first output row 32 is disposed at the first end 20 a, and a second output row 33 is disposed at the second end 20 b.

[0066] In some embodiments, reference Fig.13 The first output row 32 includes a first connection row 322 and a first connection sheet 323 stacked along a third direction Z. The first connection row 322 is in direct and insulated contact with the liquid cooling plate 20 on one side away from the first connection sheet 323 in the third direction Z. Specifically, the first connection row 322 is in direct and insulated contact with the second layer plate 23 along the third direction Z, so that the liquid cooling plate 20 can adjust and control the temperature of the first output row 32. The first output row 32 is electrically connected to the battery cell 11 through the first connection row 322. When the battery cell 11 is charged and discharged at a high rate, the first output row 32 will emit a large amount of heat. The liquid cooling plate 20 is in direct contact with the first connection row 322 to take away a large amount of heat, thereby achieving a liquid cooling effect of the first connection row 322 and ensuring that the battery cell 11 is at a suitable operating temperature.

[0067] In some embodiments, reference Fig.14 The second output row 33 includes a second connection row 332 and a second connection sheet 333 stacked along a third direction Z. The second connection row 332 is in direct and insulated contact with the liquid cooling plate 20 on one side away from the second connection sheet 333 in the third direction Z. Specifically, the second connection row 332 is in direct and insulated contact with the second layer plate 23 along the third direction Z, so that the liquid cooling plate 20 can adjust and control the temperature of the second output row 33. The second output row 33 is electrically connected to the battery cell 11 through the second connection row 332. When the battery cell 11 is charged and discharged at a high rate, the second output row 33 will emit a large amount of heat. The liquid cooling plate 20 is in direct contact with the second connection row 332 to take away a large amount of heat, thereby achieving a liquid cooling effect of the second connection row 332 and ensuring that the battery cell 11 is at a suitable operating temperature.

[0068] In some embodiments, reference Figure 6 and Fig.13The first connecting piece 323 extends along the second direction Y, one end of the first connecting piece 323 in the second direction Y is bent toward the direction close to the liquid cooling plate 20 to form a first bending portion 3231, and one end of the first bending portion 3231 in the third direction Z away from the first connecting row 322 is bent toward the direction away from the liquid cooling plate 20 to form a first connecting portion 3232, and the first connecting portion 3232 extends along the second direction Y. The structural design of the first connecting portion 3232 enables the first output row 32 to be connected and conducted with an external installation, and the structural design of the first bending portion 3231 can improve the space utilization of the first output row 32 in the third direction Z. Fig.13 The first connection row 322 is provided with a third connection end 321 on one side in the first direction X. The third connection end 321 is adjacent to the busbar 31 in the first direction X. There are multiple third connection ends 321, which are arranged at intervals along the second direction Y. Along the first direction X, the third connection end 321 passes through the through hole 21 of the liquid cooling plate 20 and is electrically connected to the negative terminal 122 of the adjacent battery cell 11. The positive terminal 121 of the battery cell 11 is electrically connected to the first connection end 311 of the busbar 31, so that the first output row 32 is electrically connected to the busbar 31 through the battery cell 11, and the first output row 32 forms a negative output terminal.

[0069] In some embodiments, reference Figure 7 and Fig.14 The second connecting piece 333 extends along the second direction Y, and one end of the second connecting piece 333 in the second direction Y is bent toward the direction close to the liquid cooling plate 20 to form a second bending portion 3331. The second bending portion 3331 is bent away from the second connecting row 332 in the third direction Z to form a second connecting portion 3332. The second connecting portion 3332 extends along the second direction Y. The structural design of the second connecting portion 3332 enables the second output row 33 to be connected and conducted with the external installation. The structural design of the second bending portion 3331 can improve the space utilization of the second output row 33 in the third direction Z. Fig.14 The second connection row 332 is provided with a fourth connection end 331 on one side of the first direction X. The fourth connection end 331 is adjacent to the busbar 31 in the first direction X. There are multiple fourth connection ends 331, which are arranged at intervals along the second direction Y. Along the first direction X, the fourth connection end 331 passes through the through hole 21 of the liquid cooling plate 20 and is electrically connected to the positive terminal 121 of the adjacent battery cell 11. The negative terminal 122 of the battery cell 11 is electrically connected to the second connection end 312 of the busbar 31, so that the second output row 33 is electrically connected to the busbar 31 through the battery cell 11, and the second output row 33 forms a positive output terminal.

[0070] Thus, the first output row 32, the bus bar 31 and the second output row 33 are electrically connected through the battery cell 11, and the battery pack 10 is electrically connected to the load and the multiple battery cells 11 in the battery pack 10 are electrically connected. Among them, the first output row 32, the bus bar 31 and the second output row 33 constitute the bus bar assembly in the CCS assembly 30. Among them, the load refers to the equipment that receives electric energy in the circuit, which is a general term for various electrical appliances. For example, common loads include electrical equipment that can consume power, such as air conditioners and electric motors on electric vehicles.

[0071] In some embodiments, reference Figure 3 , Figure 6-7 as well as Figure 15-16 The CCS component 30 also includes a signal acquisition component 34, referring to Figure 3 as well as Figure 6-7 The signal collection component 34 is arranged on the side of the bus 31 away from the liquid cooling plate 20 in the third direction Z. Along the third direction Z, the signal collection component 34 is in direct contact with the bus 31. The signal collection component 34 is arranged at a distance from the liquid cooling plate 20. Figure 7 as well as Figure 15-16 The signal collection component 34 is provided with an avoidance hole 341 which penetrates the signal collection component 34 along the third direction Z. The avoidance hole 341 and the through hole 21 of the liquid cooling plate 20 are arranged opposite to each other along the third direction Z, so that the connection between the first connection end 311 of the bus bar 31 and the positive terminal 121 of the battery cell 11 is exposed, and the connection between the second connection end 312 of the bus bar 31 and the negative terminal 122 is exposed, and the connection between the third connection end 321 and the negative terminal 122 of the adjacent battery cell 11 is exposed, and the connection between the fourth connection end 331 and the positive terminal 121 of the adjacent battery cell 11 is exposed, so as to release the heat of the connection. Combined with the liquid cooling of the battery cell 11, the bus bar 31, the first connection row 322 and the second connection row 332 by the liquid cooling plate 20, the battery cell 11 is ensured to be at a suitable operating temperature.

[0072] In some embodiments, the signal acquisition component 34 is a flexible circuit board, and the signal acquisition component 34 is used to collect voltage and temperature data of the first output row 32 , the bus bar 31 , and the second output row 33 .

[0073] In some embodiments, reference Figure 3 , Figure 6-7 as well as Figure 15-16 The CCS assembly 30 further includes a connector 35, the connector 35 includes a mounting plate 351 and a socket 352, the mounting plate 351 is arranged on a side of the first output row 32 away from the bus bar 31 in the first direction X, and the socket 352 is arranged on the mounting plate 351, referring to Figure 15-16One end of the signal collection component 34 in the first direction X is bent toward the direction close to the liquid cooling plate 20 to form a third bending portion 342, the third bending portion 342 extends along the third direction Z, and the third bending portion 342 is connected to the mounting plate 351. The structural design of the third bending portion 342 can improve the space utilization of the CCS component 30 in the third direction Z. The signal collection component 34 is connected to the external temperature collector through the socket 352 of the connector 35 and the external harness end connector.

[0074] In some embodiments, reference Figure 1 The battery pack 1 also includes a box body 40, and the box body 40 includes two side walls 41 arranged opposite to each other along the first direction X, and a liquid inlet 411 and a liquid outlet 412 are arranged on one of the side walls 41 at intervals. The liquid inlet connector 24 of the liquid cooling plate 20 is connected to the liquid inlet 411 through a pipeline, and the liquid outlet connector 25 is connected to the liquid outlet 412 through a pipeline. In order to achieve temperature control of the battery cell 11 in the battery pack 10, the battery pack 1 is also provided with a liquid cooling component in the accommodating cavity of the box body 40. The liquid cooling component can be arranged on the second surface 10b of the battery pack 10 and directly contact the second end surface 112 of the battery cell 11 to achieve a liquid cooling effect on the battery cell 11. The liquid cooling component can also be arranged between two adjacent battery cells 11 in the second direction Y, directly contacting the side wall of the battery cell 11, to achieve a liquid cooling effect on the battery cell 11, and the liquid inlet end of the liquid cooling component is connected to the liquid inlet 411 through a pipeline, and the liquid outlet end is connected to the liquid outlet 412 through a pipeline, thereby forming a liquid cooling system for the battery pack 1, and the liquid inlet connector 24 of the liquid cooling plate 20 is connected to the pipeline connecting the liquid cooling component and the liquid inlet 411, and the liquid outlet connector 25 of the liquid cooling plate 20 is connected to the pipeline connecting the liquid cooling component and the liquid outlet 412, so that the liquid cooling plate 20 is connected to the liquid cooling system of the battery pack 1, forming a circulating liquid cooling flow channel system, which can more efficiently control the temperature of the electrical connection between the battery cell 11 and the bus 31, thereby increasing the service life and operational stability of the battery cell 11.

[0075] The technical solutions provided by the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, 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 application.

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 battery pack (10) comprises a plurality of battery cells (11), wherein the battery cells (11) have a first end surface (111), and a terminal (12) is arranged on the first end surface (111); A liquid cooling plate (20) is arranged on one side of the battery pack (10) in the third direction (Z); along the third direction (Z), the first end surface (111) faces the liquid cooling plate (20) and is in direct contact with the liquid cooling plate (20); a flow channel (201) is arranged inside the liquid cooling plate (20); the flow channel (201) extends along the first direction (X); a through hole (21) is opened on the liquid cooling plate (20) and passes through the liquid cooling plate (20) along the third direction (Z); the flow channel (201) and the through hole (21) are arranged at intervals; and the terminal (12) is exposed from the through hole (21); A CCS assembly (30) comprising: A busbar (31), wherein the busbar (31) is arranged on a side of the liquid cooling plate (20) facing away from the battery pack (10) in the third direction (Z), the busbar (31) is in direct contact with the liquid cooling plate (20), and the busbar (31) is electrically connected to the terminal (12).

2. The battery pack according to claim 1, characterized in that: The liquid cooling plate (20) comprises a first plate (22) and a second plate (23) stacked along the third direction (Z); The first layer plate (22) is in direct contact with the first end surface (111); The second layer plate (23) is provided with a groove (231) on one side facing the first layer plate (22) in the third direction (Z); the first layer plate (22) and the second layer plate (23) are stacked and cover the groove (231) to define the flow channel (201) inside the groove (231).

3. The battery pack according to claim 1, wherein: The number of the busbars (31) is plural, and the plurality of busbars (31) are arranged at intervals along the first direction (X); The busbar (31) comprises a body (310) and a connecting arm (313), wherein the body (310) and the connecting arm (313) are connected; Along the third direction (Z), the main body (310) and the liquid cooling plate (20) are spaced apart, and the connecting arm (313) is in direct contact with a portion of the liquid cooling plate (20) where the flow channel (201) is provided.

4. The battery pack according to claim 3, characterized in that: The busbar (31) further comprises a first connection end (311) and a second connection end (312) arranged opposite to each other along the first direction (X), the first connection end (311) and the second connection end (312) being connected to the body (310) respectively; The terminal (12) comprises a positive terminal (121) and a negative terminal (122), wherein the negative terminal (122) surrounds the positive terminal (121) along a circumferential direction of the positive terminal (121); The positive terminal (121) is protrudingly arranged on the first end surface (111), the positive terminal (121) is inserted into the through hole (21), the negative terminal (122) is arranged on the first end surface (111), at least a portion of the negative terminal (122) is exposed from the through hole (21), and the liquid cooling plate (20) is in direct contact with the negative terminal (122); Of the two battery cells (11) adjacent to each other along the first direction (X), the first connection end (311) is electrically connected to the positive terminal (121) of one of the battery cells (11), and the second connection end (312) passes through the through hole (21) and is electrically connected to the negative terminal (122) of the other of the battery cells (11).

5. The battery pack according to claim 1, wherein: The CCS assembly (30) further comprises a first output row (32) and a second output row (33); Along the first direction (X), the first output row (32) is arranged at one end of the liquid cooling plate (20), the second output row (33) is arranged at the other end of the liquid cooling plate (20), and the bus bar (31) is arranged between the first output row (32) and the second output row (33); The first output row (32) comprises a first connection row (322) and a first connection sheet (323) stacked along the third direction (Z), and a side of the first connection row (322) facing away from the first connection sheet (323) in the third direction (Z) is in direct contact with the liquid cooling plate (20); And / or, the second output row (33) comprises a second connection row (332) and a second connection sheet (333) stacked along the third direction (Z), and the second connection row (332) is in direct contact with the liquid cooling plate (20) on a side facing away from the second connection sheet (333) in the third direction (Z).

6. The battery pack according to claim 5, 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; The first connecting piece (323) extends along the second direction (Y), one end of the first connecting piece (323) in the second direction (Y) is bent in a direction close to the liquid cooling plate (20) to form a first bent portion (3231), the first bent portion (3231) extends along the third direction (Z), one end of the first bent portion (3231) in the third direction (Z) away from the first connecting row (322) is bent in a direction away from the liquid cooling plate (20) to form a first connecting portion (3232), and the first connecting portion (3232) extends along the second direction (Y); And / or, the second connecting piece (333) extends along the second direction (Y), one end of the second connecting piece (333) in the second direction (Y) is bent toward the liquid cooling plate (20) to form a second bending portion (3331), the second bending portion (3331) extends along the third direction (Z), one end of the second bending portion (3331) in the third direction (Z) away from the second connecting row (332) is bent toward the direction away from the liquid cooling plate (20) to form a second connecting portion (3332), and the second connecting portion (3332) extends along the second direction (Y).

7. The battery pack according to claim 1, characterized in that: The CCS component (30) further includes a signal acquisition component (34); The signal collecting component (34) is arranged on a side of the bus bar (31) facing away from the liquid cooling plate (20) in the third direction (Z); Along the third direction (Z), the signal collection component (34) is in direct contact with the bus bar (31), and the signal collection component (34) is spaced apart from the liquid cooling plate (20); The signal collection component (34) is provided with an avoidance hole (341) which passes through the signal collection component (34) along the third direction (Z); the avoidance hole (341) and the through hole (21) are arranged opposite to each other along the third direction (Z).

8. The battery pack according to claim 7, characterized in that: The CCS assembly (30) further comprises a connector (35), the connector (35) comprising a mounting plate (351) and a socket (352), the mounting plate (351) being arranged on a side of the first output row (32) away from the bus bar (31) in the first direction (X), and the socket (352) being arranged on the mounting plate (351); One end of the signal collection component (34) in the first direction (X) is bent in a direction close to the liquid cooling plate (20) to form a third bent portion (342), the third bent portion (342) extends along the third direction (Z), and the third bent portion (342) is connected to the mounting plate (351).

9. The battery pack according to claim 1, characterized in that: The battery pack further comprises a box body (40), the box body (40) comprising two side walls (41) arranged opposite to each other along the first direction (X), and a liquid inlet (411) and a liquid outlet (412) are arranged on one of the side walls (41) at intervals; The liquid cooling plate (20) further comprises a liquid inlet joint (24) and a liquid outlet joint (25), wherein the liquid inlet joint (24) and the liquid outlet joint (25) are respectively connected to the flow channel (201); Along the first direction (X), the liquid inlet joint (24) and the liquid outlet joint (25) are respectively arranged at two ends of the liquid cooling plate (20), or the liquid inlet joint (24) and the liquid outlet joint (25) are arranged at the same end of the liquid cooling plate (20); The liquid inlet joint (24) is in communication with the liquid inlet (411), and the liquid outlet joint (25) is in communication with the liquid outlet (412).

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

Images