Battery pack upper cover, first battery pack, second battery pack and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and provides a battery pack upper cover, a first battery pack, a second battery pack and electric equipment. The first battery pack comprises a shell, at least one battery cell module and a cooling structure, each battery cell module comprises a plurality of first battery cells, and the plurality of first battery cells are arranged in the shell along a first direction; the cooling structure comprises a plurality of first cooling plates, the plurality of first cooling plates are arranged at intervals in the first direction, and each first cooling plate is inserted between every two adjacent first battery cells so as to cool the first battery cells. According to the first battery pack provided by the invention, a good heat dissipation effect on the first battery cell in the first battery pack is realized.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack upper cover, a first battery pack, a second battery pack, and an electrical device. Background Art

[0002] Batteries are used to provide electrical energy for electric vehicles. As the required voltage of electric vehicles increases, the cooling requirements for batteries also increase.

[0003] A battery includes a plurality of battery cell modules and a cooling component. Each battery cell module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence in the battery cell module. The cooling component includes a cooling plate, and the cooling plate is located at the top or bottom of the battery cell module. The heat generated by the battery cells is discharged through the cooling plate. As the number of battery cells in the battery cell module increases and the energy density of the battery cells increases, the heat dissipation of the battery cell module gradually increases.

[0004] In the related art, the cooling effect of the cooling component is relatively low. Summary of the Utility Model

[0005] The present application provides a battery pack upper cover, a first battery pack, a second battery pack, and an electrical device, which improves the cooling effect on the first battery cells in the first battery pack.

[0006] The present application provides a first battery pack, including: a housing, at least one battery cell module, and a cooling structure. Each battery cell module includes a plurality of first battery cells, and the plurality of first battery cells are arranged in the housing along a first direction; the cooling structure includes a plurality of first cooling plates, the plurality of first cooling plates are arranged at intervals along the first direction, and each first cooling plate is respectively inserted between two adjacent first battery cells to be in contact with at least one first battery cell to cool the first battery cell.

[0007] In a possible implementation manner, for the first battery pack provided by the present application, each first battery cell has a top end and a bottom end in the height direction of the housing; wherein, there is an included angle between the height direction and the first direction; both ends of the first cooling plate in the height direction of the housing extend to the top end and the bottom end of the first battery cell respectively.

[0008] In a possible implementation manner, for the first battery pack provided by the present application, the cooling structure further includes a second cooling plate, and the second cooling plate is opposite to the bottom wall of the housing; the plurality of first cooling plates are all arranged on the second cooling plate, each first cooling plate has a first flow channel inside, the second cooling plate has a second flow channel inside, each first flow channel is communicated with the second flow channel, and each first flow channel and the second flow channel form a cooling loop.

[0009] In a possible implementation, for the first battery pack provided by the present application, each first cooling plate includes a first liquid inlet and a first liquid outlet. The first liquid inlet and the first liquid outlet are located at both ends of the first cooling plate and are communicated with a first flow channel, and both the first liquid inlet and the first liquid outlet are communicated with a second flow channel.

[0010] In a possible implementation, for the first battery pack provided by the present application, a plurality of fins are arranged in the first cooling plate, and the plurality of fins form a plurality of first flow channels.

[0011] In a possible implementation, for the first battery pack provided by the present application, a first cooling plate is inserted between two adjacent first battery cells along a first direction, and the first cooling plate is attached to the surface of the first battery cell.

[0012] In a possible implementation, for the first battery pack provided by the present application, at least two first battery cells are arranged between two adjacent first cooling plates, and a heat insulation member is provided between the at least two first battery cells.

[0013] In a possible implementation, for the first battery pack provided by the present application, a first explosion-proof valve is provided on the first battery cell, a pole is provided on the first battery cell, and the first explosion-proof valve and the pole are located on different surfaces of the first battery cell.

[0014] In a possible implementation, for the first battery pack provided by the present application, the first battery cell includes a first surface and a second surface opposite to each other along a first direction, a third surface and a fourth surface opposite to each other along a second direction, and a fifth surface and a sixth surface opposite to each other along a third direction; at least one of the first surface and the second surface is attached to the first cooling plate; the pole is provided on the third surface or the fourth surface; the fifth surface faces the second cooling plate and is attached to the second cooling plate, the sixth surface faces the bottom wall of the housing, and the first explosion-proof valve is provided on the sixth surface.

[0015] In a possible implementation, for the first battery pack provided by the present application, the number of the first explosion-proof valves is multiple.

[0016] In a possible implementation, for the first battery pack provided by the present application, a first discharge channel is provided on the bottom wall of the housing, a second discharge channel and a second explosion-proof valve are provided on two side walls of the housing opposite to each other along the first direction, and the first explosion-proof valve on each first battery cell is aligned with and communicated with the first discharge channel; the first discharge channel, the second discharge channel and the second explosion-proof valve are communicated with each other.

[0017] In a possible implementation, for the first battery pack provided by the present application, the housing includes a bottom case and an upper cover. The bottom case includes a bottom wall and side walls, the bottom wall and the side walls enclose a receiving space of the bottom case, and the upper cover is covered on the bottom case.

[0018] In a possible implementation manner, for the first battery pack provided by the present application, the upper cover is a cover body formed by connecting a second cooling plate and a first cooling plate.

[0019] In a possible implementation manner, for the first battery pack provided by the present application, the number of battery cell modules is multiple. A partition is provided in the bottom case, and the partition divides the accommodation space of the bottom case into multiple sub-accommodation spaces. One or more battery cell modules are placed in each sub-accommodation space; the second explosion-proof valves correspond to the sub-accommodation spaces one by one.

[0020] The present application also provides a battery pack upper cover, including a cover plate and a plurality of cooling plates arranged on the cover plate. The plurality of cooling plates are used to be inserted between adjacent second battery cells to cool the second battery cells.

[0021] In a possible implementation manner, for the battery pack upper cover provided by the present application, the cover plate is a liquid cooling plate with a cooling channel inside.

[0022] The present application also provides a second battery pack, including a housing and at least one battery cell module. The housing includes a bottom case and an upper cover covered on the bottom case. The upper cover is the above-mentioned battery pack upper cover, and the cover plate of the battery pack upper cover is connected to the bottom case; each battery cell module includes a plurality of second battery cells, and the plurality of second battery cells are arranged in the housing along a first direction; each of the cooling plates of the battery pack upper cover is respectively inserted between two adjacent second battery cells to cool the second battery cells.

[0023] The present application also provides an electrical device, including the above-mentioned first battery pack or the above-mentioned second battery pack.

[0024] For the first battery pack provided by the present application, by providing a housing, at least one battery cell module and a cooling structure, each battery cell module includes a plurality of first battery cells, and the plurality of first battery cells are arranged in the housing along a first direction; the cooling structure includes a plurality of first cooling plates, the plurality of first cooling plates are arranged at intervals along the first direction, and each of the first cooling plates is respectively inserted between two adjacent first battery cells to cool the first battery cells. A plurality of first cooling plates are inserted in the battery cell module, and the first cooling plates can be in contact with (or adjacent to) the plurality of first battery cells in the battery cell module. Thus, the area of contact (or proximity) between the first cooling plates and the battery cell module can be increased, thereby improving the cooling effect on the first battery cells. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Schematic diagram of the cell module and the cooling component in a battery of the related art;

[0027] Figure 2 Schematic diagram of the first battery pack provided by an embodiment of the present application;

[0028] Figure 3 Explosion diagram of the first battery pack provided by an embodiment of the present application;

[0029] Figure 4 Schematic diagram of the cooling structure and the first cell in the first battery pack provided by an embodiment of the present application;

[0030] Figure 5 Schematic diagram of the first cell in the first battery pack provided by an embodiment of the present application;

[0031] Figure 6 Schematic diagram of the first cooling plate in the first battery pack provided by an embodiment of the present application;

[0032] Figure 7 Internal structure schematic diagram of the first cooling plate in the first battery pack provided by an embodiment of the present application;

[0033] Figure 8 is Figure 3 Enlarged view of part A in

[0034] Figure 9 is Figure 6 Enlarged view of part B in

[0035] Figure 10 is Figure 6 Enlarged view of part C in

[0036] Figure 11 Another schematic diagram of the cooling structure and the first cell in the first battery pack provided by an embodiment of the present application;

[0037] Figure 12 Another schematic diagram of the cooling structure and the first cell in the first battery pack provided by an embodiment of the present application;

[0038] Figure 13 Another schematic diagram of the first cell in the first battery pack provided by an embodiment of the present application;

[0039] Figure 14 Another schematic diagram of the first battery pack provided by an embodiment of the present application;

[0040] Figure 14a is a view taken along the Figure 14 D-D plane in

[0041] Figure 14bSchematic diagram of the discharge path of gas or liquid in the first battery pack provided by the embodiment of the present application;

[0042] Figure 15 Schematic diagram of the structure of the battery pack upper cover provided by the embodiment of the present application;

[0043] Figure 16 Usage state diagram of the battery pack upper cover provided by the embodiment of the present application.

[0044] Explanation of reference numerals:

[0045] 10 - battery cell module; 11 - battery cell; 20 - cooling plate;

[0046] 100 - first battery pack;

[0047] 110 - housing;

[0048] 111 - bottom wall; 1111 - first discharge channel;

[0049] 112 - side wall; 1121 - second discharge channel; 1122 - second explosion-proof valve;

[0050] 113 - accommodation space; 1131 - sub-accommodation space;

[0051] 114 - partition board;

[0052] 120 - battery cell module;

[0053] 121 - first battery cell; 121a - first surface; 121b - second surface; 121c - third surface; 121d - fourth surface; 121e - fifth surface; 121f - sixth surface;

[0054] 1211 - first explosion-proof valve; 1212 - terminal post;

[0055] 130 - cooling structure;

[0056] 131 - first cooling plate; 1311 - first flow channel; 1312 - first outer shell; 1313 - first liquid inlet; 1314 - first liquid outlet; 1315 - fin;

[0057] 132 - second cooling plate; 1321 - second flow channel; 1322 - second outer shell; 1323 - total liquid inlet; 1324 - total liquid outlet;

[0058] 140 - heat insulation member;

[0059] 200 - battery pack upper cover; 210 - cover plate; 220 - cooling plate;

[0060] 300 - second battery pack; 310 - bottom case; 311 - second battery cell;

[0061] A - Top;

[0062] B - Bottom;

[0063] X - First direction;

[0064] Y - Second direction;

[0065] Z - Third direction. Detailed implementation manners

[0066] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0067] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or indirectly connected through an intermediate medium, or the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0068] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 should not be construed as a limitation to the present application.

[0069] The terms "first", "second", "third" (if any) in the description and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0070] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or service tool that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or service tool.

[0071] Batteries are used to provide electric energy for electric vehicles. As the voltage required by electric vehicles increases, the heat dissipation of batteries also increases, and the cooling requirements for batteries also increase accordingly. Batteries include multiple battery modules and cooling components.

[0072] Figure 1 A schematic diagram of the structure of a battery cell module and a cooling assembly in a battery of related technology.

[0073] See also Figure 1 As shown, the battery cell module 10 includes a plurality of battery cells 11 , and the plurality of battery cells 11 are arranged in sequence in the battery cell module 10 .

[0074] The cooling assembly includes two cooling plates 20, which are located at the upper and lower ends of the battery module 10. Two end surfaces of the plurality of battery cells 11 are in contact with the cooling plates 20 respectively, and the heat generated by the battery cells 11 is discharged through the two cooling plates 20.

[0075] As the number of cells 11 in the cell module 10 increases and the density of the cells 11 increases, the heat dissipation of the cell module 10 gradually increases. When the heat generated by the cell 11 is discharged through the heat sinks 20 located at both ends of the cell module 10, the contact surface between the heat sink 20 and the cell 11 is only the two end surfaces with smaller areas in the cell 11, so the cooling effect on the cell module 10 is relatively low.

[0076] Based on this, the present application provides a battery pack cover, a first battery pack, a second battery pack and an electrical device, which achieves a good heat dissipation effect on the first battery cell in the first battery pack.

[0077] Figure 2 A schematic diagram of the structure of the first battery pack provided in the embodiment of the present application Figure 1 , Figure 3 An exploded schematic diagram of a first battery pack provided in an embodiment of the present application, Figure 4 A schematic diagram of the structure of the cooling structure and the first battery cell in the first battery pack provided in an embodiment of the present application, Figure 5 A schematic diagram of the structure of a first battery cell in a first battery pack provided in an embodiment of the present application.

[0078] in, Figure 4 A view in which the cooling structure is separated from the first battery cells and a view in which the cooling structure is inserted between the first battery cells are shown in order to clearly show the relative positions of the cooling structure and the first battery cells.

[0079] See Figures 2 to 5 As shown, the first battery pack 100 provided by the embodiment of the present application includes a housing 110, at least one battery cell module 120, and a cooling structure 130. Each battery cell module 120 includes a plurality of first battery cells 121, and the plurality of first battery cells 121 are arranged in the housing 110 along the first direction X. The cooling structure 130 includes a plurality of first cooling plates 131, and the plurality of first cooling plates 131 are arranged at intervals along the first direction X. See Figure 4 As shown, each of the first cooling plates 131 is respectively inserted between two adjacent first battery cells 121 to be in contact with at least one first battery cell 121 for cooling the first battery cell 121.

[0080] The housing 110 can be a cuboid or a cube. In the Figure 2 and Figure 3 shown embodiment, the housing 110 is a cuboid. The housing 110 includes a first direction X, a second direction Y, and a height direction Z. One of the first direction X and the second direction Y is the length direction, and the other is the width direction.

[0081] The housing 110 includes a bottom case and an upper cover. The bottom case includes a bottom wall 111 and side walls 112. The bottom wall 111 and the side walls 112 enclose an accommodation space 113 of the bottom case, and the battery cell module 120 is located in the accommodation space 113. The battery cell module 120 can be one or more. In the Figure 3 shown embodiment, four battery cell modules 120 are shown. The upper cover can be covered on the bottom case to support and protect the battery cell module 120 in the housing 110.

[0082] A partition 114 is provided in the bottom case. The partition 114 divides the accommodation space 113 of the bottom case into a plurality of sub-accommodation spaces 1131, and one or more battery cell modules 120 are placed in each sub-accommodation space 1131. For example Figure 3 in, one battery cell module 120 is placed in each sub-accommodation space 1131.

[0083] The partition 114 can extend along the first direction X or the second direction Y. In the Figure 3 shown, there is a partition 114 extending along the first direction X and a partition 114 extending along the second direction Y in the bottom case. The two partitions 114 cross each other to divide the accommodation space 113 into four sub-accommodation spaces 1131, and one battery cell module 120 is placed in each sub-accommodation space 113.

[0084] Each battery cell module 120 includes a plurality of first battery cells 121. Please continue to see Figures 3 to 5As shown, the first battery cell 121 can be in a blade structure. For convenience of description, the first direction is defined as the X direction, the second direction is defined as the Y direction, and the third direction is defined as the Z direction. Among them, the Z direction can be the height direction of the first battery pack or the first battery cell. A plurality of first battery cells 121 are arranged along the first direction X.

[0085] Heat is generated when the first battery cell 121 is charged and discharged. Therefore, a cooling structure 130 needs to be provided to cool the first battery cell 121.

[0086] Please continue to refer to Figure 3 and Figure 4 As shown, the cooling structure 130 includes a plurality of first cooling plates 131. The first cooling plates 131 can be cold plates made of materials with relatively high thermal conductivity such as metal, and the first cooling plates 131 can also be liquid cooling plates.

[0087] Refer to Figure 4 As shown, each of the first cooling plates 131 is inserted between two adjacent first battery cells 121. For example, one first cooling plate 131 can be inserted every other first battery cell 121, or one first cooling plate 131 can be inserted every two first battery cells 121, or one first cooling plate 131 can be inserted every three first battery cells 121. In Figure 4 one, one first cooling plate 131 is inserted every two first battery cells 121, and one first cooling plate 131 can take away the heat of two adjacent first battery cells 121. Thus, when a plurality of first cooling plates 131 can be inserted in the battery cell module 120, the first cooling plates 131 can be in contact with (or adjacent to) a plurality of first battery cells 121 in the battery cell module 120. Thus, the effective cooling area between the first cooling plates 131 and the battery cell module 120 can be increased, thereby improving the cooling effect on the first battery cells 121 and enabling the first battery pack to have a good heat dissipation effect.

[0088] In addition, the size of the first battery cell 121 in the first direction X is small, while the sizes in the second direction Y and the height direction Z are large. The first cooling plates 131 are inserted between two adjacent first battery cells along the first direction, so that the area of contact (or proximity) between the first cooling plates 131 and the first battery cells 121 is large, further improving the cooling efficiency of the first cooling plates 131.

[0089] The first battery pack 100 provided by the embodiment of the present application is provided with a housing 110, at least one battery cell module 120 and a cooling structure 130. Each battery cell module 120 includes a plurality of first battery cells 121, and the plurality of first battery cells 121 are arranged in the housing 110 along the first direction X; the cooling structure 130 includes a plurality of first cooling plates 131, and the plurality of first cooling plates 131 are arranged at intervals along the first direction X, and each first cooling plate 131 is respectively inserted between two adjacent first battery cells 121 to cool the first battery cells 121. By inserting a plurality of first cooling plates 131 into the battery cell module 120, the first cooling plates 131 can be in contact with (or adjacent to) a plurality of first battery cells 121 in the battery cell module 120. Thus, the area of contact (or proximity) between the first cooling plates 131 and the battery cell module 120 can be increased, thereby improving the cooling effect on the first battery cells and enabling the first battery pack to have a good heat dissipation effect.

[0090] Please continue to refer to Figure 4 As shown, each first battery cell 121 has a top end A and a bottom end B in the height direction Z of the housing 110, and both ends of the first cooling plate 131 in the height direction Z of the housing 110 respectively extend to the top end A and the bottom end B of the first battery cell 121.

[0091] The dimension of the first cooling plate 131 in the height direction Z is the first dimension D1, and the distance between the top end A and the bottom end B of the first battery cell 121 is the second dimension D2. The first dimension D1 can be half of the second dimension D2, or the first dimension D1 can also be close to the second dimension D2. Thus, when the first cooling plate 131 is inserted between two adjacent first battery cells 121, both ends of the first cooling plate 131 in the height direction Z of the housing 110 respectively extend to the top end A and the bottom end B of the first battery cell 121, so as to increase the area of contact (or proximity) between the first cooling plate 131 and the first battery cell 121, and further improve the cooling effect of the first cooling plate 131 on the first battery cell 121.

[0092] Figure 6 It is a schematic structural view of the first cooling plate in the first battery pack provided by the embodiment of the present application. Figure 7 It is a schematic internal structural view of the first cooling plate in the first battery pack provided by the embodiment of the present application. Figure 8 It is Figure 3 The enlarged view at A in

[0093] Refer to Figure 3 、 Figures 6 to 8As shown, the cooling structure 130 includes a second cooling plate 132. The second cooling plate 132 is opposite to the bottom wall 111 of the housing 110 in the height direction Z. A plurality of first cooling plates 131 are all arranged on the second cooling plate 132. For example, one end of each of the plurality of first cooling plates 131 can be connected to the second cooling plate 132. By providing the second cooling plate 132, the second cooling plate 132 can exchange heat with the first cooling plates 131. In addition, the second cooling plate 132 can also contact the first battery cell 121 to cool the first battery cell 121.

[0094] Wherein, in order to further improve the cooling effect of the cooling structure 130, in the embodiments of the present application, each of the first cooling plates 131 has a first flow channel 1311 therein, and the second cooling plate 132 has a second flow channel 1321 therein. Each of the first flow channels 1311 is communicated with the second flow channel 1321, and each of the first flow channels 1311 and the second flow channel 1321 form a cooling loop. A coolant can be provided in the cooling loop to cool the first battery cell 121. The flow channels in the first cooling plate 131 and the second cooling plate 132 enable the circulating flow of the coolant, thereby enhancing the cooling effect.

[0095] Please continue to refer to Figure 3 and Figure 4 As shown, the second cooling plate 132 of the cooling structure 130 can be opposite to the bottom wall 111 of the housing 110, and the second cooling plate 132 can contact (or be adjacent to) one side of the top A of the plurality of first battery cells 121. Thus, the area of contact (or adjacency) between the cooling structure 130 and the first battery cells 121 is further increased, thereby improving the cooling efficiency.

[0096] The plurality of first cooling plates 131 can be connected to the second cooling plate 132 by welding. The first cooling plates 131 and the second cooling plate 132 form an integral body. When assembling the first battery pack 100, the plurality of first cooling plates 131 can be inserted between adjacent first battery cells 121 at the same time, so that the assembly efficiency of the first battery pack 100 is relatively high.

[0097] The first cooling plates 131 and the second cooling plate 132 can both be liquid cooling plates. There is coolant in the liquid cooling plates. As the coolant flows, heat can be carried away, thereby achieving the cooling effect of the liquid cooling plates.

[0098] Refer to Figure 7 As shown, the first cooling plate 131 includes a first outer shell 1312 and a first flow channel 1311 located in the first outer shell 1312, and the second cooling plate 132 includes a second outer shell 1322 and a second flow channel 1321 located in the second outer shell 1322.

[0099] Each first flow channel 1311 in each first cooling plate 131 is communicated with the second flow channel 1321 in the second cooling plate. Please continue to refer toFigure 8 As shown, the end of the second flow channel 1321 has a total liquid inlet 1323 and a total liquid outlet 1324. The coolant enters the second flow channel 1321 from the total liquid inlet 1323, is distributed from the second flow channel 1321 to a plurality of first flow channels 1311. After the coolant absorbs the heat generated by the first battery cell 121, it converges back into the second flow channel 1321 and flows out from the total liquid outlet 1324, taking away the heat generated by the first battery cell 121 through the flow of the coolant.

[0100] In Figure 2 and Figure 3 In the illustrated embodiment, the cover formed by connecting the second cooling plate 132 and the first cooling plate 131 can serve as the upper cover of the first battery pack. In some other embodiments, the upper cover of the first battery pack 100 can also be provided on the second cooling plate 132.

[0101] Next, the specific structure of the first cooling plate 131 will be described.

[0102] Figure 9 For Figure 6 the enlarged view at position B in Figure 10 For Figure 6 the enlarged view at position C in

[0103] Refer to Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, each first cooling plate 131 includes a first liquid inlet 1313 and a first liquid outlet 1314. The first liquid inlet 1313 and the first liquid outlet 1314 are located at both ends of the first cooling plate 131 and are in communication with the first flow channel 1311. Both the first liquid inlet 1313 and the first liquid outlet 1314 are in communication with the second flow channel 1321.

[0104] The first liquid inlet 1313 and the first liquid outlet 1314 are located at both ends of the first cooling plate 131 along the second direction Y. A part of the second flow channel 1321 is aligned and in communication with the first liquid inlet 1313, and another part of the second flow channel 1321 is aligned and in communication with the first liquid outlet 1314. The coolant in the second flow channel 1321 enters the first cooling plate 131 from the first liquid inlet 1313 and flows in the first flow channel 1311 along the second direction Y (the flow direction of the coolant is shown by the dotted line with an arrow in Figure 7 ), and then returns to the second flow channel 1321 from the first liquid outlet 1314. By providing the first liquid inlet 1313 and the first liquid outlet 1314 on the first cooling plate 131 and making the first liquid inlet 1313 and the first liquid outlet 1314 in communication with the second flow channel 1321, it is possible to avoid setting up additional connecting pipes to connect the first flow channel 1311 and the second flow channel 1321, thereby simplifying the internal structure of the cooling structure 130.

[0105] Please continue to refer to Figure 7 As shown, a plurality of fins 1315 are provided in the first cooling plate 131, and the plurality of fins 1315 form a plurality of first flow channels 1311.

[0106] The fins 1315 extend along the second direction Y in the first outer shell 1312, and the plurality of fins 1315 are arranged at intervals along the height direction Z. The space between two adjacent fins 1315 forms a plurality of first flow channels 1311. The heat of the first battery cell 121 is transferred to the plurality of fins 1315 through the first outer shell 1312, and is transferred to the coolant in the first flow channels 1311 through the fins 1315. By providing the fins 1315, the distribution of the coolant in the first outer shell 1312 can be made more uniform.

[0107] Figure 11 This is another schematic structural diagram of the cooling structure and the first battery cell in the first battery pack provided by the embodiment of the present application. In Figure 11 it, the first cooling plate 131 is partially inserted between the first battery cells 121 to clearly show the relative positions of the first cooling plate 131 and the first battery cells 121.

[0108] Refer to Figure 11 As shown, a first cooling plate 131 is inserted between two adjacent first battery cells 121 along the first direction X, and the first cooling plate 131 is in contact with the surface of the first battery cell 121.

[0109] When the cooling structure 130 is used to dissipate heat from the first battery cell 121 with a large heat dissipation amount, a first cooling plate 131 can be inserted every other first battery cell 121, so that the first cooling plates 131 are arranged on both opposite sides of each first battery cell 121 along the first direction X. Thus, the heat dissipation efficiency of the cooling structure 130 can be improved.

[0110] The surfaces of the first cooling plate 131 and the first battery cell 121 are both flat surfaces. The first cooling plate 131 is in contact with the surface of the first battery cell 121, which can improve the rate of heat transfer.

[0111] Figure 12 This is yet another schematic structural diagram of the cooling structure and the first battery cell in the first battery pack provided by the embodiment of the present application. In Figure 11 it, the first cooling plate 131 and the heat insulation member 140 are both partially inserted between the first battery cells 121 to clearly show the relative positions of the first cooling plate 131, the first battery cell 121, and the heat insulation member 140.

[0112] Refer to Figure 12 As shown, two first battery cells 121 are arranged between two adjacent first cooling plates 131, and a heat insulation member 140 is provided between the two first battery cells 121.

[0113] When the cooling structure 130 is used to dissipate heat from the first battery cell 121 with a relatively small heat dissipation amount, a first cooling plate 131 can be inserted every two first battery cells 121. An insulating member 140 is provided between these two first battery cells 121, and the insulating member 140 can be made of compressible insulating gel. The heat of the two first battery cells 121 is separated by the intermediate insulating member 140 and dissipated through the first cooling plates 131 on both sides of the two first battery cells 121.

[0114] Next, the specific structure of the first battery cell 121 and the specific arrangement manner of the first battery cell 121 in the housing 110 will be described.

[0115] Figure 13 Another structural schematic diagram of the first battery cell in the first battery pack provided by the embodiment of the present application.

[0116] See Figure 5 and Figure 13 As shown, a first explosion-proof valve 1211 is provided on the first battery cell 121, and a pole 1212 is provided on the first battery cell 121, and the first explosion-proof valve 1211 and the pole 1212 are located on different surfaces of the first battery cell 121.

[0117] The pole 1212 can include a positive pole and a negative pole. The positive pole and the negative pole can be located on the same surface of the first battery cell 121 or on different surfaces of the first battery cell 121. The first explosion-proof valve 1211 and the pole 1212 are located on different surfaces of the first battery cell 121. Thus, the distance between the first explosion-proof valve 1211 and the pole 1212 can be made relatively far, avoiding damage to the pole 1212 or other electronic components connected to the pole 1212 by the liquid or gas ejected from the first explosion-proof valve 1211.

[0118] Please continue to see Figure 3 、 Figure 5 and Figure 13 As shown, the first battery cell 121 includes a first surface 121a and a second surface 121b opposite to each other in the first direction X, a third surface 121c and a fourth surface 121d opposite to each other in the second direction Y, and a fifth surface 121e and a sixth surface 121f opposite to each other in the third direction Z. At least one of the first surface 121a and the second surface 121b is in contact with the first cooling plate 131. The pole 1212 is provided on the third surface 121c or the fourth surface 121d. The fifth surface 121e faces the second cooling plate 132 and is in contact with the second cooling plate 132. The sixth surface 121f faces the bottom wall 111 of the housing 110, and the first explosion-proof valve 1211 is provided on the sixth surface 121f. In this way, the first explosion-proof valve 1211 is far from the pole 1212 and is provided on a different surface of the first battery cell 121.

[0119] The surface areas of the first surface 121a and the second surface 121b of the first battery cell 121 are relatively large. At least one of the first surface 121a or the second surface 121b is attached to the first cooling plate 131, which can result in a relatively large contact area between the first battery cell 121 and the first cooling plate 131.

[0120] The pole column 1212 is disposed on the third surface 121c or the fourth surface 121d. The fifth surface 121e can also be attached to the second cooling plate 132. The first explosion-proof valve 1211 needs to avoid the pole column 1212 and needs to be far away from the cooling structure 130. Therefore, the first explosion-proof valve 1211 can be disposed on the sixth surface 121f. The pole column 1212 and the first explosion-proof valve 1211 are reasonably arranged on the surface of the first battery cell 121, so that the cooling efficiency and the safety performance of the first battery cell 121 are relatively high.

[0121] The number of the first explosion-proof valves 1211 can be set according to the gas discharge volume and the liquid discharge volume of the first battery cell 121. The first explosion-proof valve 1211 can be one or multiple. Multiple first explosion-proof valves 1211 can be spaced apart on the sixth surface 121f.

[0122] Figure 14 Another structural schematic diagram of the first battery pack provided by the embodiment of the present application; Figure 14a For along Figure 14 The view sectioned along the D-D plane in; Figure 14b A schematic diagram of the gas or liquid discharge path in the first battery pack provided by the embodiment of the present application. Among them, Figure 14 And Figure 14a The cooling structure 130 and the battery cell module 120 in one sub-accommodation space 1131 are omitted in to clearly show the first discharge channel 1111.

[0123] See Figure 14 、 Figure 14a And Figure 14b As shown, a first discharge channel 1111 is provided on the bottom wall 111 of the housing 110. Second discharge channels 1121 and second explosion-proof valves 1122 are provided on two side walls 112 of the housing 110 opposite to each other along the first direction X. The first explosion-proof valve 1211 on each first battery cell 121 is aligned with and communicated with the first discharge channel 1111. The first discharge channel 1111, the second discharge channel 1121 and the second explosion-proof valve 1122 are communicated with each other.

[0124] The first discharge channel 1111 can be a groove provided on the bottom wall 111 and extending along the first direction X. The first discharge channel 1111 and the first explosion-proof valve 1211 are aligned along the height direction Z. When there are multiple first explosion-proof valves 1211 on each first battery cell 121, multiple first discharge channels 1111 need to be provided on the bottom wall 111.

[0125] On two side walls 112 opposite to each other along the first direction X, a second discharge channel 1121 is further provided, and a second explosion-proof valve 1122 is further provided on a side of the side wall 112 away from the accommodation space 113.

[0126] The gas or liquid discharged from the first battery cell 121 sprays out from the first explosion-proof valve 1211, flows along the first direction X in the first discharge channel 1111 to the second discharge channel 1121, and then is discharged through the second explosion-proof valve 1122. It can be seen that the entire discharge path of the gas or liquid is far away from the pole column 1212, avoiding damage to the pole column 1212 during discharge.

[0127] It should be noted that the second explosion-proof valves 1122 and the sub-accommodation spaces 113 are in one-to-one correspondence, that is, a second explosion-proof valve 1122 is provided on each sub-accommodation space 113, whereby the gas or liquid in each sub-accommodation space 113 can be discharged in time.

[0128] Figure 15 It is a schematic structural diagram of the battery pack upper cover provided by the embodiment of the present application. Figure 16 It is a usage state diagram of the battery pack upper cover provided by the embodiment of the present application.

[0129] See Figure 15 As shown, the embodiment of the present application further provides a battery pack upper cover 200, including a cover plate 210 and a plurality of cooling plates 220 arranged on the cover plate 210. The plurality of cooling plates 220 are used to be inserted between adjacent second battery cells 311 to cool the second battery cells 311.

[0130] A plurality of cooling plates 220 are arranged on the cover plate 210 at intervals. There is an included angle between the cooling plates 220 and the cover plate 210. In Figure 15 and Figure 16 In the shown embodiment, the cooling plates 220 can be perpendicular to the cover plate 210. The cooling plates 220 can be cold plates made of materials with relatively high thermal conductivity such as metal, and the cooling plates 220 can also be liquid cooling plates. The cover plate 210 can also be a cold plate made of materials with relatively high thermal conductivity such as metal, and the cover plate 210 can also be a liquid cooling plate with cooling channels inside. When both the cover plate 210 and the cooling plates 220 are liquid cooling plates, the coolant channels in the cover plate 210 can be communicated with the coolant channels in the cooling plates 220.

[0131] The embodiment of the present application further provides a second battery pack 300. See Figure 15 and Figure 16As shown, the second battery pack 300 may include a housing, which includes a bottom case 310 and an upper cover. The upper cover may be the battery pack upper cover 200 provided in the above embodiments. The battery pack upper cover 200 is covered on the bottom case 310. At least one battery cell module is disposed in the bottom case 310. Each battery cell module may include a plurality of second battery cells 311. The plurality of second battery cells 311 are arranged in the housing along the first direction X.

[0132] When the battery pack upper cover 200 is installed on the bottom case 310, the cover plate 210 of the battery pack upper cover 200 is connected to the bottom case 310. The cooling plate 220 of the battery pack upper cover 200 may be inserted between adjacent second battery cells 311 to dissipate heat from the second battery cells 311.

[0133] The embodiment of the present application further provides an electrical device, which includes at least one of the above-mentioned first battery pack 100 or second battery pack 300. The electrical device may be a vehicle or other devices powered by a battery pack. Among them, the vehicle may be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A first battery pack, characterized in that: include: A housing (110); At least one battery cell module (120), each of the battery cell modules (120) comprising a plurality of first battery cells (121), the plurality of first battery cells (121) being arranged in a first direction (X) within the housing (110); A cooling structure (130), the cooling structure (130) comprising a plurality of first cooling plates (131), the plurality of first cooling plates (131) being arranged at intervals along the first direction (X), and each of the first cooling plates (131) being respectively inserted between two adjacent first battery cells (121) so as to fit with at least one of the first battery cells (121) so as to cool the first battery cell (121).

2. The first battery pack according to claim 1, characterized in that: Each of the first battery cells (121) has a top end (A) and a bottom end (B) in the height direction of the shell; Both ends of the first cooling plate (131) in the height direction of the housing (110) extend to the top end (A) and the bottom end (B) of the first battery cell (121), respectively.

3. The first battery pack according to claim 2, characterized in that: The cooling structure (130) further comprises a second cooling plate (132), wherein the second cooling plate (132) is opposite to the bottom wall (111) of the housing (110); Multiple first cooling plates (131) are arranged on the second cooling plate (132), each of the first cooling plates (131) has a first flow channel (1311), the second cooling plate (132) has a second flow channel (1321), each of the first flow channels (1311) is connected to the second flow channel (1321), and each of the first flow channels (1311) and the second flow channel (1321) forms a cooling circuit.

4. The first battery pack according to claim 3, characterized in that: Each of the first cooling plates (131) includes a first liquid inlet (1313) and a first liquid outlet (1314), wherein the first liquid inlet (1313) and the first liquid outlet (1314) are located at two ends of the first cooling plate (131) and are connected to the first flow channel (1311), and the first liquid inlet (1313) and the first liquid outlet (1314) are both connected to the second flow channel (1321).

5. The first battery pack according to claim 3, characterized in that: A plurality of fins (1315) are arranged in the first cooling plate (131), and the plurality of fins (1315) form a plurality of the first flow channels (1311).

6. The first battery pack according to any one of claims 1 to 5, characterized in that: A first cooling plate (131) is inserted between two adjacent first battery cells (121) along the first direction (X), and the first cooling plate (131) is in contact with the surface of the first battery cell (121).

7. The first battery pack according to any one of claims 1 to 5, characterized in that: At least two of the first battery cells (121) are arranged between two adjacent first cooling plates (131), and a heat insulating member (140) is provided between the at least two first battery cells (121).

8. The first battery pack according to any one of claims 3 to 5, characterized in that: The first battery core (121) is provided with a first explosion-proof valve (1211), the first battery core (121) has a pole (1212), and the first explosion-proof valve (1211) and the pole (1212) are located on different surfaces of the first battery core (121).

9. The first battery pack according to claim 8, characterized in that: The first battery cell (121) comprises a first surface (121a) and a second surface (121b) opposite to each other along the first direction X, a third surface (121c) and a fourth surface (121d) opposite to each other along the second direction (Y), and a fifth surface (121e) and a sixth surface (121f) opposite to each other along the third direction (Z); At least one of the first surface (121a) and the second surface (121b) is in contact with the first cooling plate (131); The pole (1212) is arranged on the third surface (121c) or the fourth surface (121d); The fifth surface (121e) faces the second cooling plate (132) and is in contact with the second cooling plate (132), the sixth surface (121f) faces the bottom wall (111) of the shell (110), and the first explosion-proof valve (1211) is arranged on the sixth surface (121f).

10. The first battery pack according to claim 9, characterized in that: The number of the first explosion-proof valves (1211) is multiple.

11. The first battery pack according to claim 10, characterized in that: A first discharge channel (1111) is provided on the bottom wall (111) of the shell (110); a second discharge channel (1121) and a second explosion-proof valve (1122) are provided on two side walls (112) of the shell (110) opposite to each other along the first direction (X); the first explosion-proof valve (1211) on each of the first battery cells (121) is aligned with the first discharge channel (1111) and is in communication with the first discharge channel (1111); the first discharge channel (1111), the second discharge channel (1121) and the second explosion-proof valve (1122) are in communication with each other.

12. The first battery pack according to claim 11, characterized in that: The housing (110) comprises a bottom shell and an upper cover, the bottom shell comprises a bottom wall (111) and a side wall (112), the bottom wall (111) and the side wall (112) are arranged to form a receiving space (113) of the bottom shell, and the upper cover is arranged on the bottom shell.

13. The first battery pack according to claim 12, characterized in that: The upper cover is a cover body formed by connecting the second cooling plate (132) and the first cooling plate (131).

14. The first battery pack according to claim 12, characterized in that: There are multiple battery cell modules (120); a partition (114) is provided in the bottom shell; the partition (114) divides the storage space (113) of the bottom shell into multiple sub-storage spaces (1131); each of the sub-storage spaces (1131) is used to place one or more battery cell modules (120); and the second explosion-proof valve (1122) corresponds to the sub-storage space (1131) one by one.

15. A battery pack cover, characterized in that: It comprises a cover plate (210) and a plurality of cooling plates (220) arranged on the cover plate (210); the plurality of cooling plates (220) are used to be inserted between adjacent second battery cells (311) to cool the second battery cells (311).

16. The battery pack cover according to claim 15, characterized in that: The cover plate (210) is a liquid cooling plate having a cooling channel inside.

17. A second battery pack, characterized in that: include: A shell, the shell comprising a bottom shell (310) and an upper cover arranged on the bottom shell (310), the upper cover being the battery pack upper cover (200) according to any one of claims 15 to 16, and the cover plate (210) of the battery pack upper cover (200) being connected to the bottom shell (310); At least one battery cell module, each of the battery cell modules comprising a plurality of second battery cells (311), the plurality of second battery cells (311) being arranged in the housing along a first direction (X); Each cooling plate (220) of the battery pack upper cover (200) is respectively inserted between two adjacent second battery cells (311) to cool the second battery cells (311).

18. An electrical equipment, characterized in that: It comprises the first battery pack (100) according to any one of claims 1 to 14 or the second battery pack (300) according to claim 17.

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