Battery pack and electric device

Abstract

The utility model relates to a battery pack and an electric device, and relates to the field of batteries. A battery pack of the battery pack is arranged in a box body; the battery pack comprises at least two first battery monomers, the size of the first battery monomers in the third direction is smaller than the sizes of the first battery monomers in the first direction and the second direction, and first pole columns are arranged on the two sides of the first battery monomers in the first direction respectively; one side of the first liquid cooling plate in the third direction is connected with one side of the first battery monomer in the third direction; a second liquid cooling plate is arranged between two adjacent first battery monomers in the first direction, and a first avoiding through hole is formed in the position, corresponding to the first pole column, of the second liquid cooling plate; and the two adjacent first pole columns of the two adjacent first battery monomers are electrically connected and are respectively inserted into the second liquid cooling plate through the first avoiding through holes. The battery pack provided by the utility model solves the technical problems of large occupied space and low heat dissipation efficiency of the battery pack in the prior art.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery pack and an electrical device. Background Technology

[0002] As the power source for new energy vehicles, the stability, reliability, and safety of power batteries are of paramount importance. Currently, battery packs on the market contain multiple cells, which are connected to liquid cooling plates via components such as thermal pads or thermal adhesives. The function of the liquid cooling plates is to confine the coolant and isolate it from the external environment, thereby achieving the cooling function of the battery cells.

[0003] Traditional battery cells are designed vertically, meaning the height of the cells is aligned vertically with the battery pack. This results in a large battery pack height, which in turn occupies a significant amount of space in the vehicle's Z-axis, reducing passenger comfort. Furthermore, the cells generate a lot of heat at the terminals, and existing liquid cooling plates are ineffective at dissipating heat from these areas. Utility Model Content

[0004] The purpose of this application is to provide a battery pack and power supply device to alleviate the technical problems of large space occupation and low heat dissipation efficiency of battery packs in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] In a first aspect, the battery pack provided by this utility model includes a housing, a battery pack, a first liquid cooling plate, and a second liquid cooling plate; the battery pack is installed inside the housing.

[0007] The battery pack includes at least two first battery cells. Each first battery cell has a first direction, a second direction, and a third direction that are perpendicular to each other. The at least two first battery cells are arranged along the first direction. The size of the first battery cell in the third direction is smaller than the size of the first battery cell in the first direction and the second direction. Each first battery cell has a first electrode post on both sides of the first direction.

[0008] The first liquid cooling plate is connected to the first battery cell on the third-party side;

[0009] A second liquid cooling plate is provided between two adjacent first battery cells along the first direction. The second liquid cooling plate is connected to the first liquid cooling plate. A first clearance through hole is provided on the second liquid cooling plate at the position corresponding to the first electrode post.

[0010] Along the first direction, two adjacent first battery cells are electrically connected to each other and are respectively inserted into the second liquid cooling plate through the first clearance through hole.

[0011] In conjunction with the first aspect, in the first embodiment of the first aspect provided by this utility model, the two sidewalls of the second liquid cooling plate along the first direction respectively contact the sidewalls of the two first battery cells adjacent to it along the first direction.

[0012] The second liquid cooling plate is provided with a first liquid cooling channel, which is arranged around the first clearance through hole in the circumferential direction to dissipate heat from the first pole post.

[0013] In conjunction with the first aspect, in a second embodiment of the first aspect provided by this utility model, the dimension of the first clearance through hole in the first direction is greater than or equal to the dimension of the first pole post in the first direction.

[0014] In conjunction with the first aspect, in a third embodiment of the first aspect provided by this utility model, the first battery cell is provided with a first pressure relief device on one side along the first direction, the side wall of the second liquid cooling plate is provided with a first air inlet at a position corresponding to the first pressure relief device, and the interior of the second liquid cooling plate is provided with a first pressure relief and exhaust channel communicating with the first air inlet.

[0015] In conjunction with the third embodiment of the first aspect, the fourth embodiment of the first aspect provided by this utility model further includes a third liquid cooling plate, and the battery pack includes at least two second battery cells. The size of the second battery cell in the third direction is smaller than the size of the second battery cell in the first direction and the second direction. The second battery cell is provided with second pole posts on both sides of the first direction.

[0016] The first liquid cooling plate is provided between the second battery cell and the first battery cell in the third party;

[0017] The third liquid cooling plate is provided between two adjacent second battery cells along the first direction. The third liquid cooling plate is connected to the first liquid cooling plate. A second clearance through hole is provided on the third liquid cooling plate at a position corresponding to the position of the second electrode post.

[0018] Along the first direction, two adjacent second battery cells are electrically connected to each other and are respectively inserted into the third liquid cooling plate through the second clearance through hole.

[0019] In conjunction with the fourth embodiment of the first aspect, the fifth embodiment of the first aspect provided by this utility model is that the second battery cell is provided with a second pressure relief device on one side along the first direction, the side wall of the third liquid cooling plate is provided with a second air inlet at a position corresponding to the second pressure relief device, and the interior of the third liquid cooling plate is provided with a second pressure relief and exhaust channel connected to the second air inlet.

[0020] The second pressure relief device corresponds to the second air inlet.

[0021] In conjunction with the fifth embodiment of the first aspect, the sixth embodiment of the first aspect provided by this utility model is that the second liquid cooling plate and the third liquid cooling plate are integrally disposed.

[0022] In conjunction with the first aspect, in the seventh embodiment of the first aspect provided by this utility model, along the third direction, one side of the first battery cell is connected to the bottom wall of the housing, and the other side is connected to the first liquid cooling plate, and a second liquid cooling channel is provided in the bottom wall of the housing.

[0023] In conjunction with the first aspect, in the eighth embodiment of the first aspect provided by this utility model, along the third direction, one side of the first liquid cooling plate is connected to the bottom wall of the housing, and the other side is connected to the first battery cell.

[0024] Secondly, the electrical device provided by this utility model includes the battery pack described in any of the first aspects above.

[0025] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:

[0026] The battery pack provided by this utility model includes a housing, a battery pack, a first liquid cooling plate, and a second liquid cooling plate; the battery pack is installed inside the housing; the housing provides support and fixation for the battery pack.

[0027] The battery pack includes at least two first battery cells, each having a first direction, a second direction, and a third direction that are perpendicular to each other. The at least two first battery cells are arranged along the first direction. The size of the first battery cell in the third direction is smaller than the size of the first battery cell in the first and second directions. The first battery cell has a first terminal post on each side of the first direction. This allows the first battery cells to be installed in a flat position, reducing the space occupied by the battery pack in the third direction and solving the problem of large space occupation of battery packs in the prior art. Furthermore, the battery pack can be stacked in the third direction, improving the space utilization of the battery pack.

[0028] The first liquid cooling plate is connected to the first battery cell on the third-direction side; a second liquid cooling plate is provided between two adjacent first battery cells along the first direction, and the second liquid cooling plate is connected to the first liquid cooling plate. The first liquid cooling plate and the second liquid cooling plate simultaneously dissipate heat from the first battery cells. The design of the dual liquid cooling plates increases the heat dissipation area of ​​the first battery cells and improves the heat dissipation efficiency of the battery pack.

[0029] The second liquid cooling plate has a first clearance through hole at the position corresponding to the first electrode post; wherein, along the first direction, two adjacent first electrode posts of two adjacent first battery cells are electrically connected and are respectively inserted into the second liquid cooling plate through the first clearance through hole; the first electrode post is inserted into the second liquid cooling plate through the first clearance through hole, so that the second liquid cooling plate dissipates heat from the first electrode post, thereby achieving targeted heat dissipation of key heat-generating parts of the first battery cell, improving the heat dissipation efficiency of the battery pack, and increasing the charging rate. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 An exploded view of the battery pack provided in an embodiment of this application;

[0032] Figure 2 Cross-sectional view of the second liquid cooling plate in the battery pack provided in the embodiments of this application. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the structure of the first battery cell in the battery pack provided in the embodiments of this application;

[0034] Figure 4 Three views of the first battery cell in the battery pack provided in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the second liquid cooling plate in the battery pack provided in an embodiment of this application;

[0036] Figure 6 Cross-sectional view of the second liquid cooling plate in the battery pack provided in the embodiments of this application. Figure 2 ;

[0037] Figure 7 A perspective view of the second liquid cooling plate in the battery pack provided in an embodiment of this application;

[0038] Figure 8This is a schematic diagram of the structure of the battery pack housing provided in an embodiment of this application;

[0039] Figure 9 A cross-sectional view of a first embodiment of the first liquid cooling plate in a battery pack provided in this application;

[0040] Figure 10 This is a cross-sectional view of a second embodiment of the first liquid cooling plate in the battery pack provided in this application.

[0041] icon:

[0042] 110 - First battery cell; 111 - First terminal post; 112 - First pressure relief device; 113 - First liquid filling port; 120 - Second battery cell; 121 - Second terminal post; 123 - Second liquid filling port;

[0043] 200 - First liquid cooling plate;

[0044] 300 - Second liquid cooling plate; 310 - First clearance through hole; 320 - First liquid cooling channel; 330 - First air inlet; 340 - First pressure relief exhaust channel;

[0045] 400 - Third liquid cooling plate; 410 - Second clearance through hole; 420 - Second air inlet; 430 - Second pressure relief exhaust channel;

[0046] 600- Enclosure;

[0047] Y - First direction; X - Second direction; Z - Third direction. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0049] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] Example 1

[0052] Please see Figure 1 The battery pack provided by this utility model includes a housing 600, a battery pack, a first liquid cooling plate 200, and a second liquid cooling plate 300; the battery pack is installed inside the housing 600; the battery pack includes at least two first battery cells 110, each first battery cell 110 having a first direction Y, a second direction X, and a third direction Z that are perpendicular to each other; at least two first battery cells 110 are arranged along the first direction Y; the size of the first battery cell 110 in the third direction Z is smaller than the size of the first battery cell 110 in the first direction Y and the second direction X; the first battery cell 110 has a first liquid cooling plate 300 on each side of the first direction Y. Terminal 111; First liquid cooling plate 200 is connected to first battery cell 110 on the third direction Z side; Second liquid cooling plate 300 is provided between two adjacent first battery cells 110 along the first direction Y, and the second liquid cooling plate 300 is connected to the first liquid cooling plate 200. First clearance through hole 310 is provided on the second liquid cooling plate 300 at the position corresponding to the first terminal 111; wherein, along the first direction Y, two adjacent first terminals 111 of two adjacent first battery cells 110 are electrically connected and are respectively inserted into the second liquid cooling plate 300 through the first clearance through hole 310.

[0053] Specifically, see Figure 1 The first battery cell 110 is arranged in N columns and M rows, that is, the first battery cell 110 is arranged in N columns along the second direction X and in M ​​rows along the first direction Y, and a second liquid cooling plate 300 is installed between two adjacent rows. When using this battery pack, the third direction Z is arranged along the vertical direction of the battery pack. Preferably, insulating adhesive and heat insulation pads are attached between the two sides of the second liquid cooling plate 300 and the first battery cell 110 to provide insulation and heat insulation; of course, the insulating adhesive and heat insulation pads need to avoid the first clearance through hole 310.

[0054] The battery pack is installed inside the housing 600, which provides support and fixation for the battery pack. The size of the first battery cell 110 in the third direction Z is smaller than that in the first direction Y and the second direction X. The first battery cell 110 has first terminals 111 on both sides in the first direction Y, enabling the first battery cell 110 to be installed horizontally, reducing the space occupied by the battery pack in the third direction Z, and solving the problem of large space occupation of battery packs in the prior art. The first liquid cooling plate 200 is connected to the first battery cell 110 in the third direction Z on one side. A second liquid cooling plate 300 is provided between two adjacent first battery cells 110 along the first direction Y, and the second liquid cooling plate 300 is connected to the first liquid cooling plate 200. The first liquid cooling plate 200 and the second liquid cooling plate 300 simultaneously dissipate heat from the first battery cell 110. The design of the dual liquid cooling plates increases the heat dissipation area of ​​the first battery cell 110 and improves the heat dissipation efficiency of the battery pack. Along the first direction Y, two adjacent first battery cells 110 are electrically connected to two adjacent first terminals 111 and are respectively inserted into the second liquid cooling plate 300 through the first clearance through hole 310. The first terminal 111 is inserted into the second liquid cooling plate 300 through the first clearance through hole 310, so that the second liquid cooling plate 300 dissipates heat from the first terminal 111, thereby achieving targeted heat dissipation of the key heat-generating parts of the first battery cell 110, improving the heat dissipation efficiency of the battery pack, and increasing the charging rate.

[0055] The structure and shape of the battery pack are described in detail below:

[0056] In the optional solution provided by this utility model embodiment, the two side walls of the second liquid cooling plate 300 along the first direction Y respectively contact the side walls of the two adjacent first battery cells 110 along the first direction Y; the second liquid cooling plate 300 is provided with a first liquid cooling channel 320, which is arranged around the first clearance through hole 310 in the circumferential direction to dissipate heat from the first electrode post 111.

[0057] Specifically, coolant is provided in the first liquid cooling channel 320. Furthermore, in this embodiment, see... Figure 2 The first clearance through hole 310 is square, and the first liquid cooling channel 320 is arranged around the outer periphery of the first clearance through hole 310 in a square shape. Of course, the shape of the first clearance through hole 310 can be set to other shapes that are compatible with the first pole post 111, such as a circle, which should also be within the protection scope of this utility model embodiment.

[0058] The two sidewalls of the second liquid cooling plate 300 contact the sidewalls of the two adjacent first battery cells 110 along the first direction Y, respectively, increasing the contact area between the second liquid cooling plate 300 and the two adjacent first battery cells 110, thus realizing the heat dissipation function of the second liquid cooling plate 300 for the two adjacent first battery cells 110. The first liquid cooling channel 320 is arranged around the circumference of the first clearance through hole 310. Because the two adjacent first terminals 111 of the two adjacent first battery cells 110 along the first direction Y are electrically connected and are respectively inserted into the second liquid cooling plate 300 through the first clearance through hole 310, the first liquid cooling channel 320 surrounds the outer periphery of the first terminals 111 after assembly, further improving the heat dissipation effect of the second liquid cooling plate 300 on the first terminals 111 and improving the thermal management capability of the battery pack.

[0059] In the optional solution provided by this utility model embodiment, the dimension of the first clearance through hole 310 in the first direction Y is greater than or equal to the dimension of the first pole post 111 in the first direction Y.

[0060] Specifically, in this embodiment, see Figures 2 to 4 The size of the first clearance through hole 310 in the first direction Y is equal to the size of the first pole post 111 in the first direction Y, and the shape of the first clearance through hole 310 is the same as the shape of the first pole post 111, so that the outer wall of the first pole post 111 fits with the inner wall of the first clearance through hole 310, increasing the contact area between the first pole post 111 and the first clearance through hole 310, and enhancing the heat dissipation effect of the second liquid cooling plate 300 on the first pole post 111.

[0061] The first clearance through hole 310 has a dimension in the first direction Y that is greater than or equal to the dimension of the first terminal post 111 in the first direction Y, so that the first terminal post 111 of the first battery cell 110 can pass through the first clearance through hole 310 and be electrically connected to the first terminal post 111 of the adjacent first battery cell 110, thus avoiding the problem that the first terminal post 111 cannot be inserted into the second liquid cooling plate 300.

[0062] In the optional solution provided by the present utility model embodiment, the first battery cell 110 is provided with a first pressure relief device 112 on one side along the first direction Y, the side wall of the second liquid cooling plate 300 is provided with a first air inlet 330 at a position corresponding to the first pressure relief device 112, and the interior of the second liquid cooling plate 300 is provided with a first pressure relief and exhaust channel 340 connected to the first air inlet 330.

[0063] Specifically, see Figure 3 The first pressure relief device 112 is located on the side wall of the first battery cell 110 and is spaced apart from the first terminal post 111. This ensures that the first pressure relief device 112 of the battery pack no longer faces upwards toward the passenger compartment, improving the safety of the cockpit. The other side wall of the first battery cell 110 is provided with a first liquid injection port 113. See also... Figure 5 Each second liquid cooling plate 300 is provided with multiple first air inlets 330, which are spaced apart along the second direction X, and each of the multiple first air inlets 330 corresponds to a multiple row of first battery cells 110. See also Figure 6 The first air inlet 330 is connected to the first pressure relief exhaust channel 340 so that the gas entering from the first air inlet 330 can be discharged through the first pressure relief exhaust channel 340, and multiple first air inlets 330 can be integrated into the first pressure relief exhaust channel 340 for discharge, thereby reducing the volume of the second liquid cooling plate 300.

[0064] The first battery cell 110 has a first pressure relief device 112 on its side wall, which allows gas to be discharged through the first pressure relief device 112 in the event of thermal runaway, and also reduces the space occupied by the first battery cell 110. The second liquid cooling plate 300 has a first air inlet 330 opposite to the first pressure relief device 112 and connected to the first pressure relief exhaust channel 340, which allows the gas discharged from the first pressure relief device 112 to be discharged from the battery pack, thus preventing thermal runaway.

[0065] In the optional embodiment of this utility model, the battery pack further includes a third liquid cooling plate 400, and the battery group includes at least two second battery cells 120. The size of the second battery cell 120 in the third direction Z is smaller than the size of the second battery cell 120 in the first direction Y and the second direction X. The second battery cell 120 is provided with second terminals 121 on both sides of the first direction Y; in the third direction Z...

[0066] A first liquid cooling plate 200 is provided between the second battery cell 120 and the first battery cell 110; a third liquid cooling plate 400 is provided between two adjacent second battery cells 120 along the first direction Y, the third liquid cooling plate 400 is connected to the first liquid cooling plate 200, and a second clearance through hole 410 is provided on the third liquid cooling plate 400 at a position corresponding to the second electrode post 121; wherein, along the first direction Y, two adjacent second electrode posts 121 of two adjacent second battery cells 120 are electrically connected and are respectively inserted into the third liquid cooling plate 400 through the second clearance through hole 410.

[0067] Specifically, see Figure 1 The battery pack comprises two layers of battery cells: an upper layer of first battery cell 110 and a lower layer of second battery cell 120. Both the second battery cell 120 and the first battery cell 110 are installed horizontally. A third liquid cooling plate 400 is installed between two adjacent second battery cells 120 along the first direction Y. Preferably, insulating adhesive and heat insulation pads are attached between the sides of the third liquid cooling plate 400 and the second battery cells 120 to provide insulation and heat insulation; of course, the insulating adhesive and heat insulation pads need to avoid the second clearance through hole 410.

[0068] The second battery cell 120 is installed horizontally, similar to the first battery cell 110, reducing its space occupation. Furthermore, the second battery cell 120 increases the rated voltage and rated capacity of the battery pack. The third liquid cooling plate 400 provides heat dissipation for the second battery cell 120 and specifically dissipates heat from the second terminal 121 of the second battery cell 120, thereby improving the heat dissipation effect of the second battery cell 120.

[0069] In the optional solution provided by this utility model embodiment, the second battery cell 120 is provided with a second pressure relief device on one side along the first direction Y, the side wall of the third liquid cooling plate 400 is provided with a second air inlet 420 at a position corresponding to the second pressure relief device, and the interior of the third liquid cooling plate 400 is provided with a second pressure relief and exhaust channel 430 connected to the second air inlet 420; the second pressure relief device corresponds to the second air inlet 420.

[0070] Specifically, in this embodiment, the second battery cell 120 and the first battery cell 110 are identical in shape and structure. The only difference is that the first battery cell 110 is installed on the upper layer and the second battery cell 120 is installed on the lower layer. This avoids the problems of complicated installation procedures and high error rates caused by the different structures of the two battery cells.

[0071] Along the first direction Y, the two opposite sidewalls of the second battery cell 120 are provided with a second pressure relief device and a second liquid injection port 123, which enables the second battery cell 120 to discharge gas through the second pressure relief device in the event of thermal runaway, and also reduces the space occupied by the second battery cell 120. The third liquid cooling plate 400 is provided with a second air inlet 420 opposite to the second pressure relief device and communicating with the second pressure relief exhaust channel 430, so as to discharge the gas discharged from the second pressure relief device out of the battery pack and avoid thermal runaway.

[0072] In the optional embodiment of this utility model, the second liquid cooling plate 300 and the third liquid cooling plate 400 are integrally arranged.

[0073] Specifically, see Figure 6 and Figure 7The liquid cooling plate is formed by processing a plate-shaped material, which has a second liquid cooling plate 300 and a third liquid cooling plate 400. In a first embodiment, the first pressure relief device 112 of the first battery cell 110 is oriented in the first direction Y, and the second pressure relief device of the second battery cell 120 is oriented in the same direction Y. The first air inlet 330 and the second air inlet 420 are spaced apart, and the first pressure relief exhaust channel 340 and the second pressure relief exhaust channel 430 are connected. This achieves the function of the second liquid cooling plate 300 and the third liquid cooling plate 400 being integrally formed, and simultaneously cooling and venting the first battery cell 110 and the second battery cell 120. In the second embodiment, the first pressure relief device 112 of the first battery cell 110 is oriented in the same direction Y as the second pressure relief device of the second battery cell 120 in the same direction Y. The first air inlet 330 and the second air inlet 420 are spaced apart, and the first pressure relief exhaust channel 340 and the second pressure relief exhaust channel 430 are separated. This achieves the function of integrating the second liquid cooling plate 300 and the third liquid cooling plate 400, which can simultaneously cool and exhaust the first battery cell 110 and the second battery cell 120. In the third embodiment, the first pressure relief device 112 of the first battery cell 110 is oriented in the opposite direction Y to the second pressure relief device of the second battery cell 120 in the first direction Y. The first air inlet 330 and the second air inlet 420 are located on both sides of the liquid cooling plate and are spaced apart along the third direction Z. The first pressure relief exhaust channel 340 is connected to the second pressure relief exhaust channel 430. This achieves the function of integrating the second liquid cooling plate 300 and the third liquid cooling plate 400, and simultaneously cooling and venting the first battery cell 110 and the second battery cell 120. For the fourth embodiment, see [link to fourth embodiment]. Figure 6 The first pressure relief device 112 of the first battery cell 110 is oriented in the first direction Y opposite to the orientation of the second pressure relief device of the second battery cell 120 in the first direction Y. The first air inlet 330 and the second air inlet 420 are respectively located on both sides of the liquid cooling plate and are spaced apart along the third direction Z. The first pressure relief exhaust channel 340 and the second pressure relief exhaust channel 430 are separated. This realizes that the second liquid cooling plate 300 and the third liquid cooling plate 400 are integrated, which can simultaneously cool and exhaust the first battery cell 110 and the second battery cell 120. Also, if the battery cell on one side of the liquid cooling plate experiences thermal runaway, it will not affect the battery cell on the other side of the liquid cooling plate.

[0074] The second liquid cooling plate 300 and the third liquid cooling plate 400 are integrated into one unit, which saves installation steps, improves installation accuracy and reduces production costs.

[0075] In the optional solution provided by this utility model embodiment, along the third direction Z, one side of the first battery cell 110 is connected to the bottom wall of the housing 600, and the other side is connected to the first liquid cooling plate 200. A second liquid cooling channel is provided in the bottom wall of the housing 600.

[0076] Specifically, this implementation method is based on the case where only the first battery cell 110 is provided, the upper and lower sides of the first battery cell 110 are respectively the first liquid cooling plate 200 and the bottom wall of the housing 600, and the bottom wall of the housing 600 is provided with a second liquid cooling channel to achieve heat dissipation on both the upper and lower sides of the first battery cell 110.

[0077] The first liquid cooling plate 200 and the second liquid cooling channel simultaneously dissipate heat from the upper and lower sides of the first battery cell 110, thereby improving heat dissipation efficiency.

[0078] In another implementation, along the third direction Z, one side of the first liquid cooling plate 200 is connected to the bottom wall of the housing 600, and the other side is connected to the first battery cell 110.

[0079] Specifically, this implementation method is also based on the case of only setting the first battery cell 110. First, the first liquid cooling plate 200 is installed inside the housing 600 and attached to the bottom wall of the housing 600. Then, the first battery cell 110 and other components are installed inside the housing 600 to reduce the weight of the housing 600 and reduce the cost of the battery pack.

[0080] In another implementation, along the third direction Z, one side of the first liquid cooling plate 200 is connected to the first battery cell 110, and the other side is connected to the second battery cell 120. The side of the second battery cell 120 facing away from the first liquid cooling plate 200 is connected to the bottom wall of the housing 600. A second liquid cooling channel is provided in the bottom wall of the housing 600.

[0081] Specifically, see Figure 1 and Figure 8 The housing 600 includes a top cover, a frame, and a bottom protective plate. The top cover is located on the top of the frame, and the bottom protective plate is installed on the bottom of the frame. The first battery cell 110, the first liquid cooling plate 200, and the second battery cell 120 are all located inside the frame. A second liquid cooling channel is provided inside the bottom protective plate.

[0082] This implementation is based on the simultaneous arrangement of a first battery cell 110 and a second battery cell 120. The upper and lower sides of the first battery cell 110 are respectively the top cover and the first liquid cooling plate 200, and the upper and lower sides of the second battery cell 120 are respectively the first liquid cooling plate 200 and the bottom wall of the housing 600. A second liquid cooling channel is provided in the bottom wall of the housing 600 to achieve heat dissipation for the first battery cell 110 and the second battery cell 120.

[0083] In the optional solution provided by this utility model embodiment, the first liquid cooling plate 200 is provided with a flow channel.

[0084] Specifically, see Figure 9 and Figure 10The first liquid cooling plate 200 adopts a flexible component or a flexible design, and has internal flow channels with irregular polygonal cross-sections, for example... Figure 9 In a first embodiment of the first liquid cooling plate 200, the flow channel is configured as a parallelogram, or for example... Figure 10 In a second embodiment of the first liquid cooling plate 200, the cross-sections of two adjacent flow channels are different, and both are irregular polygons.

[0085] The flow channel of the first liquid cooling plate 200 can withstand the volume expansion that occurs during the charging and discharging of the battery cells, and the first liquid cooling plate 200 can cool the battery cells over a large area, improve the thermal management performance of the battery pack, and achieve the effect of rapid cooling or heating.

[0086] Example 2

[0087] The electrical device provided in this embodiment includes the battery pack described in Embodiment 1, and therefore also possesses all the beneficial effects of Embodiment 1, which will not be repeated here.

[0088] The electrical devices provided in this embodiment of the utility model include, but are not limited to, vehicles or ship hulls.

[0089] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack, characterized in that, include: The enclosure (600), battery pack, first liquid cooling plate (200), and second liquid cooling plate (300); the battery pack is installed inside the enclosure (600); The battery pack includes at least two first battery cells (110), each first battery cell (110) having a first direction (Y), a second direction (X), and a third direction (Z) that are perpendicular to each other. The at least two first battery cells (110) are arranged along the first direction (Y). The size of the first battery cell (110) in the third direction (Z) is smaller than the size of the first battery cell (110) in the first direction (Y) and the second direction (X). The first battery cell (110) has a first terminal post (111) on each side of the first direction (Y). The first liquid cooling plate (200) is connected to the first battery cell (110) on the third direction (Z) side; A second liquid cooling plate (300) is provided between two adjacent first battery cells (110) along the first direction (Y). The second liquid cooling plate (300) is connected to the first liquid cooling plate (200). A first clearance through hole (310) is provided on the second liquid cooling plate (300) at a position corresponding to the first electrode post (111). Along the first direction (Y), two adjacent first electrode posts (111) of two adjacent first battery cells (110) are electrically connected and are respectively inserted into the second liquid cooling plate (300) through the first clearance through hole (310).

2. The battery pack according to claim 1, characterized in that, The two sidewalls of the second liquid cooling plate (300) along the first direction (Y) respectively contact the sidewalls of the two first battery cells (110) adjacent to it along the first direction (Y); The second liquid cooling plate (300) is provided with a first liquid cooling channel (320), which is arranged around the first clearance through hole (310) to dissipate heat from the first pole post (111).

3. The battery pack according to claim 1, characterized in that, The dimension of the first clearance through hole (310) in the first direction (Y) is greater than or equal to the dimension of the first pole post (111) in the first direction (Y).

4. The battery pack according to claim 1, characterized in that, The first battery cell (110) is provided with a first pressure relief device (112) on one side along the first direction (Y), and the side wall of the second liquid cooling plate (300) is provided with a first air inlet (330) at a position corresponding to the first pressure relief device (112), and the interior of the second liquid cooling plate (300) is provided with a first pressure relief and exhaust channel (340) that communicates with the first air inlet (330).

5. The battery pack according to claim 4, characterized in that, The battery pack also includes a third liquid cooling plate (400), and the battery pack includes at least two second battery cells (120). The size of the second battery cell (120) in the third direction (Z) is smaller than the size of the second battery cell (120) in the first direction (Y) and the second direction (X). The second battery cell (120) is provided with second pole posts (121) on both sides of the first direction (Y). The first liquid cooling plate (200) is provided between the second battery cell (120) and the first battery cell (110) in the third direction (Z); A third liquid cooling plate (400) is provided between two adjacent second battery cells (120) along the first direction (Y). The third liquid cooling plate (400) is connected to the first liquid cooling plate (200). A second clearance through hole (410) is provided on the third liquid cooling plate (400) at a position corresponding to the second electrode post (121). Along the first direction (Y), two adjacent second battery cells (120) are electrically connected to two adjacent second terminals (121) and are respectively inserted into the third liquid cooling plate (400) through the second clearance through hole (410).

6. The battery pack according to claim 5, characterized in that, The second battery cell (120) is provided with a second pressure relief device on one side along the first direction (Y), and the side wall of the third liquid cooling plate (400) is provided with a second air inlet (420) at a position corresponding to the second pressure relief device. The interior of the third liquid cooling plate (400) is provided with a second pressure relief and exhaust channel (430) that communicates with the second air inlet (420). The second pressure relief device corresponds to the second air inlet (420). 。 7. The battery pack according to claim 6, characterized in that, The second liquid cooling plate (300) and the third liquid cooling plate (400) are integrally formed.

8. The battery pack according to claim 1, characterized in that, Along the third direction (Z), one side of the first battery cell (110) is connected to the bottom wall of the housing (600), and the other side is connected to the first liquid cooling plate (200). A second liquid cooling channel is provided in the bottom wall of the housing (600).

9. The battery pack according to claim 1, characterized in that, Along the third direction (Z), one side of the first liquid cooling plate (200) is connected to the bottom wall of the housing (600), and the other side is connected to the first battery cell (110).

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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