Battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle, the battery pack comprising a single battery and a heat transfer piece, the single battery comprising a shell, an electric core and a plurality of pole columns, the shell defining an accommodating space inside, the electric core being arranged in the accommodating space, the shell having at least a first surface and a second surface, the pole columns being arranged in the electric core and extending out of the shell from the first surface, at least one of the pole columns being a sheet-shaped body; the heat transfer piece being capable of transferring heat on the single battery close to the first surface to the second surface. By designing at least a part of the pole columns as a sheet-shaped structure, the sheet-shaped pole columns have the characteristic of large outer surface area, and are used in cooperation with the heat transfer piece, so that the heat near the pole columns can be led out and transferred to the position near the second surface, thereby improving the heat dissipation effect of the battery pack, and further enabling the battery pack to have better fast charging capacity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and in particular, the present application relates to a battery pack and a vehicle having the same. BACKGROUND

[0002] In recent years, with the driving of new energy policy, super charging technology has entered a new stage of standard setting and industrial application to solve the problems of "range anxiety and slow charging". Among them, lithium batteries are used in power batteries, energy storage batteries and the like due to their high energy density, cycle times and other advantages. However, the existing power battery system will generate a large amount of heat when fast charging, and the heat dissipation capacity is poor, which limits the fast charging capacity of the conventional power battery system.

[0003] Therefore, it is necessary to develop a new battery pack that can solve the heat dissipation problem caused by fast charging. SUMMARY

[0004] One object of the present application is to provide a battery pack that can solve the technical problem of poor heat dissipation effect of the battery pack in the prior art, which limits the fast charging capacity.

[0005] According to a first aspect of the present application, a battery pack is provided, comprising: a single battery, the single battery comprising a shell, an electric core and a plurality of pole columns, the shell defining an accommodation space therein, the electric core being arranged in the accommodation space, the shell having at least a first surface and a second surface, the pole columns being arranged in the electric core and extending out of the shell from the first surface, at least one of the pole columns being a sheet body; a heat transfer member, the heat transfer member being capable of transferring heat on the single battery close to the first surface to the second surface.

[0006] According to an embodiment of the present application, the shell has an edge extending along a first direction, a second direction and a third direction, the first direction and the second direction defining a first plane, the first direction and the third direction defining a second plane, and the second direction and the third direction defining a third plane; the first surface is connected with the second surface, and the first surface is parallel to the third plane, and the second surface is parallel to the second plane.

[0007] According to an embodiment of the present application, the surface area of the second surface is greater than the surface area of the first surface.

[0008] According to an embodiment of the present application, the heat transfer member comprises: a heat conduction member, the heat conduction member being arranged on the first surface and being in heat conduction connection with the pole column, the heat conduction member extending towards the position where the second surface is located to transfer the heat of the pole column to the second surface.

[0009] According to an embodiment of the present application, the number of the single cells is multiple, and the heat-conducting member is respectively connected in heat conduction with the pole columns of two single cells arranged adjacently.

[0010] According to an embodiment of the present application, the heat transfer member further comprises a first connecting portion, a second connecting portion and a third connecting portion connected in sequence, the first connecting portion, the second connecting portion and the third connecting portion cooperatively form an accommodating groove for accommodating the heat-conducting member, the first connecting portion is connected with the pole column of one of the two single cells, the second connecting portion is connected with the pole column of the other of the two single cells, and the third connecting portion is located between the first connecting portion and the second connecting portion and connected with the first connecting portion and the second connecting portion respectively.

[0011] According to an embodiment of the present application, the heat transfer member further comprises a fourth connecting portion arranged at the end of the third connecting portion close to the second surface, and the fourth connecting portion is connected in heat conduction with the heat-conducting member and the second surface respectively.

[0012] According to an embodiment of the present application, the battery pack further comprises a heat sink, at least a portion of the heat sink is arranged opposite to the first surface and can exchange heat with the pole column.

[0013] According to an embodiment of the present application, the heat sink comprises at least one tubular member, the tubular member has a first fluid passage for cooling fluid to flow, and a portion of the tubular member forms at least a portion of the heat transfer member.

[0014] According to an embodiment of the present application, the battery pack further comprises a cooler, and the cooler is connected in heat conduction with the second surface.

[0015] According to an embodiment of the present application, the cooler has a second fluid passage for cooling fluid to flow, and the cooler is connected in heat conduction with the heat transfer member.

[0016] According to an embodiment of the present application, the number of the coolers is two, and the single cells are located between the two coolers.

[0017] According to an embodiment of the present application, the pole column is parallel to the third plane.

[0018] According to a second aspect of the present application, a vehicle is provided, which comprises the battery pack of any of the above embodiments.

[0019] According to an embodiment of the present application, on one hand, the overcurrent area is increased by using the sheet-shaped pole column, and on the other hand, the heat transfer member is used to realize the rapid heat dissipation of the position near the first surface, especially the position of the pole column, so that the purpose of rapid charging of the battery pack is achieved.

[0020] Other features of the present application, its nature and advantages will become more apparent from the detailed description of exemplary embodiments of the application which follows, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0022] Figure 1 is a partial exploded view of a single cell of one embodiment provided by the present application;

[0023] Figure 2 is an assembly view of a pole and current collector of one embodiment provided by the present application;

[0024] Figure 3 is a structural view of a single cell of one embodiment provided by the present application;

[0025] Figure 4 is a structural view of a single cell of one embodiment provided by the present application; Figure 3

[0026] Figure 5 is a structural view of a single cell of one embodiment provided by the present application;

[0027] Figure 6 is a structural view of a single cell of one embodiment provided by the present application;

[0028] Figure 7 is a structural view of a single cell of one embodiment provided by the present application; Figure 5 Figure 6

[0029] Figure 8 is a structural view of a single cell of one embodiment provided by the present application;

[0030] Figure 9 is a structural view of a single cell of one embodiment provided by the present application;

[0031] Figure 10 is a structural view of a single cell of one embodiment provided by the present application; Figure 8 Figure 9

[0032] Figure 11 is an assembly view of a single cell and a heat dissipation assembly of one embodiment provided by the present application;

[0033] Figure 12 is a partial exploded view of a battery pack of another embodiment provided by the present application;​​​​​

[0034] Figure 13 is an assembly view of a single battery and an explosion-proof valve according to an embodiment provided by the present application;

[0035] Figure 14 is a structural view of a corner of a connecting piece according to an embodiment provided by the present application;

[0036] Figure 15 is a structural view of another corner of a connecting piece according to an embodiment provided by the present application;

[0037] Figure 16 is a cooperation view of a second heat-conducting piece and two single batteries according to an embodiment provided by the present application;

[0038] Figure 17 is Figure 16 is an enlarged view of the A area shown in the circle;

[0039] Figure 18 is an assembly view of a pole and a cover plate according to an embodiment provided by the present application.

[0040] Reference Signs

[0041] Battery pack 1000;

[0042] Explosion-proof valve 1; exhaust direction 11;

[0043] Single battery 2; shell 21; side plate 211; cover plate 212; first surface 213; second surface 214; battery cell 22; battery cell body 221; current collector 222;

[0044] Pole group 3; positive pole 31; negative pole 32; pole 33; first connecting section 331; second connecting section 332;

[0045] First cooler 41; second cooler 42; second heat-conducting piece 43; first heat-conducting piece 44; heat sink 45; connecting piece 46; first connecting part 461; second connecting part 462; third connecting part 463; fourth connecting part 464. DETAILED DESCRIPTION

[0046] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values are not limiting to the scope of the present application unless specifically stated otherwise.

[0047] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.

[0048] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art(s) can not be discussed in detail herein. However, where appropriate, the techniques, methods, and apparatus should be considered as being part of the specification.

[0049] In all of the compositions shown and discussed herein, any specific numerical value should be interpreted as merely an example, and not a limitation. Other examples of the exemplary embodiments can have different values.

[0050] It should be noted that like reference numerals and letters refer to like items throughout the attached drawings, and thus, once an item is defined in one drawing, it is not necessary that it be further discussed in the remaining drawings.

[0051] A battery pack 1000 according to embodiments of the present application is described below in conjunction with the accompanying drawings.

[0052] As shown in Figures 1 to 18 , the present application provides a battery pack 1000, which includes a single battery 2 and a heat transfer piece.

[0053] Specifically, the single battery 2 includes a shell 21, an electric core 22, and a plurality of pole columns 33. The shell 21 defines an accommodation space inside, and the electric core 22 is arranged in the accommodation space. The shell 21 has at least a first surface 213 and a second surface 214. The pole columns 33 are arranged on the electric core 22 and extend out of the shell 21 from the first surface 213. At least one of the pole columns 33 is a sheet body. The heat transfer piece can transfer heat on the single battery 2 close to the first surface 213 to the second surface 214.

[0054] In other words, as shown in Figure 1 , the battery pack 1000 according to embodiments of the present application mainly consists of a single battery 2 and a heat transfer piece. The single battery 2 mainly consists of a shell 21, an electric core 22, and a plurality of pole columns 33. The shell 21 has an accommodation space, which can play a containing role and can accommodate the electric core 22 inside. The outer surface of the shell 21 can include at least a first surface 213 and a second surface 214. The pole columns 33 are arranged on the electric core 22. Specifically, the pole columns 33 can extend out of the shell 21 from the first surface 213, realizing the leading-out of the pole columns 33.

[0055] The number of the pole posts 33 is at least two, when the number of the pole posts 33 is two, one pole post 33 can be the positive pole post 31, and the other pole post 33 can be the negative pole post 32. For the convenience of description, one positive pole post 31 and one negative pole post 32 can be defined as one pole group. For one pole group, the positive pole post 31 and the negative pole post 32 can be arranged on the same first surface 213, or the positive pole post 31 and the negative pole post 32 can be arranged on different first surfaces 213, which is not limited herein. When the number of the pole groups is multiple, the multiple pole groups can be arranged on the same side or different sides of the shell 21, which is not limited herein. That is to say, as long as the pole post 33 is arranged on the first surface 213, it belongs to the protection scope of the present application.

[0056] It should be noted that, as shown in Figures 1 to 17 At least one pole post 33 is a sheet structure, which can be at least a part or the whole of the pole post 33, which is not limited herein. For example, the battery cell 22 includes at least one battery cell body 221 and a current collector 222 connected to the corresponding battery cell body 221. Each battery cell body 221 can include a positive pole sheet, a separator and a negative pole sheet. The current collector 222 corresponding to each battery cell body 221 can be divided into a positive pole current collector and a negative pole current collector. The positive pole current collector is connected to the positive pole post 31, and the negative pole current collector is connected to the negative pole post 32. Among them, the pole group 3 includes but is not limited to the following cases: case one, only the positive pole post 31 in one pole group 3 is a sheet-shaped pole post 33; case two, only the negative pole post 32 in one pole group 3 is a sheet-shaped pole post 33; case three, the positive pole post 31 and the negative pole post 32 in one pole group 3 are both sheet-shaped pole posts 33.

[0057] Optionally, the pole post 33 can include a first connecting section 331 and a second connecting section 332, wherein the first connecting section 331 can be used to connect with the current collector 222, and the second connecting section 332 can be connected with the first connecting section 331, and the second connecting section 332 can be used to connect with an external electrical equipment, wherein the first connecting section 331 and / or the second connecting section 332 are sheet-shaped bodies.

[0058] That is to say, the first connecting section 331 and the second connecting section 332 are connected respectively, the first connecting section 331 can be used to connect with the current collector 222, for example, to connect with the positive pole current collector or the negative pole current collector, wherein it should be noted that the tab of the battery cell 22 of the present application can be the convergence of the positive and negative pole foils, and the current collector 222 can be a structure formed after the tab is welded, at this time the current collector 222 and the tab can be two different states of the same substance. It should be noted that whether the tab and the current collector 222 are separately arranged or belong to the same structure, they all belong to the protection scope of the present application.

[0059] The first end of the second connecting section 332 is connected with the first connecting section 331, and the second end of the second connecting section 332 is used to be connected with the external electrical equipment. For example, the second connecting section 332 is located at the left side of the first connecting section 331, the right end of the first connecting section 331 can be connected with the positive current collector or the negative current collector, the left end of the first connecting section 331 can be connected with the right end of the second connecting section 332, and the left end of the second connecting section 332 can be connected with the external electrical equipment.

[0060] In addition, at least one of the first connecting section 331 and the second connecting section 332 is a sheet-shaped body, that is, the pole 33 includes the following three cases: case one, only the first connecting section 331 is a sheet-shaped body; case two, only the second connecting section 332 is a sheet-shaped body; and case three, both the first connecting section 331 and the second connecting section 332 are sheet-shaped bodies.

[0061] The conventional pole in the prior art is a cylindrical body, the conventional pole is arranged at the end of the battery cell, and the diameter of the cylindrical body needs to be smaller than the thickness of the battery cell. The surface area of the cylindrical body is related to the diameter of the cylindrical body, and therefore the surface area of the cylindrical body is small. In comparison, at least a part of the pole 33 in the present application is a sheet-shaped body structure, the thickness of the sheet-shaped body is small, and the sizes of the sheet-shaped body in multiple directions can be different from each other. For example, even if the thickness of the sheet-shaped body is smaller than the thickness of the battery cell 22, the sheet-shaped body can expand the sizes in other directions to increase the total area of the pole 33. For example, when the thickness direction of the sheet-shaped body is the front-back direction, the sheet-shaped body can expand the sizes in the length direction and the height direction. When at least the first connecting section 331 adopts the sheet-shaped body structure, not only the area of the pole 33 can be increased, but also the overcurrent area of the current collector 222 can be increased. The conventional pole in the prior art is led out through a connecting sheet, and the conventional connecting sheet design will also be limited by the overcurrent area and will generate a large amount of heat. In the present embodiment, by adopting the sheet-shaped structure, the area of the pole 33 is increased to improve the heat dissipation effect, and the overcurrent area is increased to reduce the amount of heat generated, thereby solving the technical problem that the fast charging capability of the battery with the conventional pole in the prior art is limited.

[0062] That is, when the pole 33 in the present embodiment adopts the sheet-shaped structure, not only the area of the pole 33 can be increased, but also the overcurrent area of the current collector 222 can be increased. By increasing the area of the pole 33, the pole 33 can be quickly dissipated, and by increasing the overcurrent area, the amount of heat generated is reduced, thereby helping the single battery 2 to improve the charging efficiency, improve the fast charging capability of the single battery 2, realize the fast charging of the battery pack 1000, and provide power for vehicles and the like as a power battery.

[0063] The battery pack 1000 of the present application further comprises a heat transfer member for transferring heat near the first surface 213 of the single battery 2 to the vicinity of the second surface 214, that is, the heat near the pole post 33 can be transferred to other positions through the heat transfer member, and the heat near the pole post 33 can be quickly dissipated.

[0064] Therefore, the battery pack 1000 of the present application can improve the overcurrent area by using the sheet-shaped pole post 33, and can quickly dissipate heat near the pole post 33 by using the heat transfer member, thereby achieving the purpose of quickly charging the battery pack 1000.

[0065] Optionally, the pole post 33 is an integrally formed member, for example, the pole post 33 can be prepared by an integrally forming process, for example, by stamping, etc., and the pole post 33 comprises the first connecting section 331 and the second connecting section 332 at the same time. In the present embodiment, by using the integrally formed pole post 33, the processing and production are facilitated, for example, the step of connecting the first connecting section 331 and the second connecting section 332 together can be omitted.

[0066] In some specific embodiments of the present application, as shown in Figure 2 and Figure 3 The pole post 33 is a rectangular member, for example, the first connecting section 331 and the second connecting section 332 can be combined to form a rectangular member, and the rectangular member is a plate-shaped member. For example, the first connecting section 331 and the second connecting section 332 can extend along the same plane, the first connecting section 331 is located on the left side of the second connecting section 332, and the first connecting section 331 and the second connecting section 332 extend along the horizontal direction and are located on the same horizontal plane.

[0067] In the present embodiment, by using the pole post 33 with a rectangular structure, the pole post 33 can be connected with the current collector 222 and the external electrical equipment, for example, one side of the rectangular member is connected with the current collector 222, and a large enough overcurrent area is ensured. In addition, by using the rectangular member, the area of the pole post 33 and the overcurrent area of the current collector 222 can be increased at the same time, thereby further improving the fast charging capability of the single battery 2.

[0068] In addition, when the pole post 33 is a rectangular member, the spacing between the two sides of the pole post 33 in the thickness direction is uniform, for example, the length direction of the pole post 33 extends along the horizontal direction, and the thickness direction extends along the vertical direction, and for multiple positions on the pole post 33, the spacing between the upper surface and the lower surface of the pole post 33 is the same. In the present embodiment, by using the sheet-shaped pole post 33 with uniform thickness, the processing efficiency is improved.

[0069] According to one embodiment of the present application, the shell 21 has edges extending along a first direction, a second direction and a third direction, the first direction and the second direction defining a first plane, the first direction and the third direction defining a second plane, and the second direction and the third direction defining a third plane; the first surface 213 is connected with the second surface 214, and the first surface 213 is parallel to the third plane, and the second surface 214 is parallel to the second plane.

[0070] That is, the shell 21 extends along the first direction, the second direction and the third direction respectively, i.e. has a first edge, a second edge and a third edge, wherein the first edge extends along the first direction, the second edge extends along the second direction, and the third edge extends along the third direction. A first plane can be defined by the first direction and the second direction, a second plane can be defined by the first direction and the third direction, and a third plane can be defined by the second direction and the third direction. For example, the first direction is the x-axis direction, the third direction is the y direction, and the second direction is the z-axis direction, at this time the first plane is the xz plane, the second plane is the xy plane, and the third plane is the yz plane. At this time, the shell 21 can be a cube, the first direction can be the length direction, the second direction can be the up-down direction, and the third direction can be the front-back direction.

[0071] That is, as shown in FIG. 1, the shell 21 has a first surface 213, a second surface 214 and a third surface 215, wherein the first surface 213 is connected with the second surface 214, and the second surface 214 is connected with the third surface 215. Figure 1 , Figure 3 , Figures 5 to 10As shown, the size of the battery cell 22 in the first direction is greater than the size in the second direction, and the pole group 3 is arranged at the end of the battery cell body 221 in the first direction. For example, the battery cell 22 is a conventional battery cell structure, and the shape is a cuboid. The length direction of the battery cell 22 is parallel to the first direction, the height direction of the battery cell 22 is parallel to the second direction, and the thickness direction of the battery cell 22 is parallel to the third direction. In the embodiment, the number of pole groups 3 on one battery cell body 221 can be one or more, and the pole groups 3 are arranged at the end of the battery cell body 221 in the first direction. It should be noted that when the number of pole groups 3 is more than one, the embodiment includes the case that one pole group 3 is at one end of the battery cell body 221 in the first direction, and another pole group 3 is at the other end of the battery cell body 221 in the first direction; also includes the case that a plurality of pole groups 3 are located at the same end of the battery cell body 221 in the first direction; in addition, the number of battery cell bodies 221 is more than one, and the pole group 3 of each battery cell body 221 is located at the end of the corresponding battery cell body 221 in the first direction, and the like, which will not be repeated here. In addition, in the embodiment, whether the positive pole 31 and the negative pole 32 corresponding to one pole group 3 are located at the same end of the battery cell body 221 in the first direction is not limited. That is, the embodiment includes the case that the positive pole 31 and the negative pole 32 of one pole group 3 on one battery cell body 221 are located at different sides of the battery cell body 221; and the case that a plurality of pole groups 3 are provided on one battery cell body 221, the positive poles 31 of the plurality of pole groups 3 are located at one side of the battery cell body 221, and the negative poles 32 of the plurality of pole groups 3 are located at the other side of the battery cell body 221, that is, the same side of the battery cell body 221 in the first direction is of the same polarity; also includes the case that a plurality of pole groups 3 are provided on one battery cell body 221, and the same side of the battery cell body 221 in the first direction is of different polarity, and the like.

[0072] That is, by arranging the pole group 3 at the end of the battery cell body 221 in the first direction, that is, on the first surface 213, on the one hand, it avoids the need to reserve space on the outside of the battery cell body 221 in the second direction to extend the heat dissipation path; on the other hand, it is beneficial to increase the maximum size range of the battery cell body 221 in the second direction and improve the battery capacity.

[0073] In the embodiment, by limiting the relative position relationship between the first surface 213 and the second surface 214, the heat transfer direction of the heat transfer member can be further limited, and the heat aggregation near the first surface 213 is avoided to affect the heat dissipation effect near the pole 33.

[0074] In some embodiments of the present application, the surface area of the second surface 214 is greater than the surface area of the first surface 213. That is, in the present embodiment, the pole 33 is arranged on the first surface 213 with a smaller area, and the heat near the first surface 213 is transferred to the second surface 214 with a larger area by the heat transfer member, which can expand the heat dissipation area and further improve the heat dissipation effect.

[0075] For example, the shell 21 can include a side plate 211 and a cover plate 212, the side plate 211 encloses a receiving space which can be used to accommodate the battery cell 22, and the receiving space can be closed by the cover plate 212. A through mounting hole is formed on the cover plate 212, and the pole 33 of the present application can pass through the mounting hole and be connected with the current collector 222 at the end of the battery cell body 221. At this time, the cover plate 212 is provided with a first surface 213 which can serve as an end face. The side plate 211 is provided with a second surface 214, as well as a front side and a rear side which are parallel to the first plane, and the second surface 214 can serve as a top face or a bottom face. At this time, since at least a part of the pole 33 is in a sheet structure, the pole 33 can be sheet-shapedly led out through the end face of the shell 21 by cooperation of the pole 33 with the current collector 222 and the battery cell body 221, and the total number of the sheet-shapedly led-out poles 33 led out through the end face can be one but is not limited to one. In addition, when the areas of the front side and the rear side are respectively greater than the area of the second surface 214, and the area of the second surface 214 is greater than the area of the first surface 213, and the shape of the shell 21 is substantially the same as the shape of the battery cell body 221, the front side and the rear side can be defined as large faces, and the second surface 214 can be defined as a small face.

[0076] In addition, when the pole 33 is located at the side of the battery cell body 221 in the first direction, the explosion-proof valve 1 can be designed on the side face of the battery cell body 221 in the second direction, or on the side face in the third direction. In the present embodiment, by avoiding arranging the explosion-proof valve 1 on the side of the battery cell body 221 in the first direction, more space can be reserved for the sheet-shaped pole 33 of the present application, which facilitates further expansion of the area of the pole 33. It should be noted that the side of the explosion-proof valve 1 away from the battery cell body 221 can be provided with a cooler, for example, a cooler is arranged above the explosion-proof valve 1, and optionally, an avoiding structure is arranged on the cooler to avoid blocking the opening of the explosion-proof valve 1. As shown in Figure 13 the exhaust direction 11 of the explosion-proof valve 1 can first be upward and then outward. In the general conventional winding or laminated core battery structure of the prior art, the side cover plate needs to reserve positions for the poles, the explosion-proof valve, the liquid injection hole, etc., and is limited by the height space of the cover plate. The pole tab and the pole have a small overcurrent area, high heat generation, and limited fast charging. In the present embodiment, the explosion-proof valve 1 is avoided from being arranged on the first surface 213 together with the pole 33, which can increase the area of the sheet-shaped pole 33.

[0077] In addition, the size of the explosion-proof valve 1 can be increased according to the space of the cell body 221 in the second direction and the third direction, and the number of explosion-proof valves 1 can be increased, thereby improving the system thermal safety of the battery pack 1000.

[0078] Furthermore, the explosion-proof valve 1 can be positioned on the smaller surface. Since the expansion rate of the larger surface is more likely to be greater than that of the smaller surface, limiting the installation position of the explosion-proof valve 1 avoids squeezing the larger surface due to its placement, thus improving safety performance. In addition, when multiple individual battery cells 2 are arranged along a third direction, one second surface 214 of each individual battery cell 2 can be located on the same side. In this case, the installation position of the explosion-proof valve 1 can also be set on the same side, improving structural compactness and facilitating installation.

[0079] In some specific embodiments of this application, such as Figure 3 , Figure 5 As shown, the positive terminal 31 of the terminal group 3 is located at one end of the cell body 221 in the first direction, and the negative terminal 32 is located at the other end of the cell body 221 in the first direction.

[0080] For example, when the first direction extends along the left-right direction, and there is only one terminal block 3 on the cell body 221, the terminal block 3 includes a positive terminal block 31 and a negative terminal block 32. The positive terminal block 31 is located at the left end of the cell body 221, and the negative terminal block 32 is located at the right end of the cell body 221, thus forming a double-sided single-terminal structure. For example, when the length direction of the cell body 221 extends along the left-right direction, with a positive terminal block 31 located on the left side of the cell body 221 and a negative terminal block 32 located on the right side of the cell body 221, the current direction inside the cell body 221 during charging is from left to right.

[0081] When there are multiple terminal post groups 3 on the cell body 221, there are also multiple positive terminal posts 31 and negative terminal posts 32. Each positive terminal post 31 is located on the left side of the cell body 221, and each negative terminal post 32 is located on the right side of the cell body 221. That is, multiple positive terminal posts 31 are simultaneously arranged on the left side of the cell body 221, and multiple negative terminal posts 32 are simultaneously arranged on the right side of the cell body 221. For example, if the length of the cell body 221 extends in the left-right direction, and there are two terminal post groups 3, for ease of explanation, the two terminal post groups 3 are divided into a first terminal post group and a second terminal post group. The positive terminal posts 31 of the first terminal post group and the second terminal post group are respectively located on the left side of the cell body 221, and the negative terminal posts 32 of the first terminal post group and the second terminal post group are respectively located on the right side of the cell body 221. Figure 4 and Figure 7As shown, the current direction inside the battery cell body 221 is from left to right when charging. It can be seen that in the embodiment, the battery cell body 221 has different polarity on the opposite side in the first direction and the same polarity on the same side.

[0082] In some embodiments of the present application, as Figure 5 As shown, the number of the pole group 3 on one battery cell body 221 is multiple, and the multiple pole groups 3 are distributed in the second direction. For example, the second direction of the battery cell body 221 extends in the up-down direction, and the multiple pole groups 3 are distributed in the up-down direction. When the number of the pole group 3 is two, the positive pole 31 of the first pole group is above the positive pole 31 of the second pole group, and the negative pole 32 of the first pole group is above the negative pole 32 of the second pole group. It should be noted that in the embodiment, the multiple pole groups 3 can be on the same side or on the opposite side of the battery cell body 221 in the first direction, which is not limited herein. In the embodiment, the battery cell body 221 has the same polarity on the same side in the first direction and different polarity on the same side.

[0083] In some embodiments of the present application, the positive pole 31 and the negative pole 32 of the pole group 3 are arranged at the same end of the battery cell body 221 in the first direction. For example, the first direction of the battery cell 22 is the left-right direction, and one pole group 3 is arranged on one battery cell body 221, and the positive pole 31 and the negative pole 32 of the pole group 3 are arranged on the left side or the right side of the battery cell body 221, which is determined according to the position of the current collector 222. By arranging the positive pole 31 and the negative pole 32 of the pole group 3 on the same side of the battery cell body 221, on the one hand, it is beneficial to the centralized arrangement of the pole 33, and on the other hand, it is beneficial to the arrangement of the multiple battery cell bodies 221 in the first direction. For example, the number of the battery cell bodies 221 is two, which are divided into a first battery cell body and a second battery cell body, and the first battery cell body is located on the left side of the second battery cell body, and the pole group 3 of the first battery cell body is located on the leftmost side of the first battery cell body, and the pole group of the second battery cell body is located on the rightmost side of the second battery cell body. In the embodiment, the battery cell body 221 has different polarity on the same side in the first direction.

[0084] According to an embodiment of the present application, as Figure 9As shown, there are two battery cell bodies 221, which are sequentially distributed along a first direction. Each battery cell body 221 has at least one terminal post group 3. In the first direction, the terminal post group 3 of one battery cell body 221 is located at one end of the battery cell 22, and the terminal post group 3 of the other battery cell body 221 is located at the other end of the battery cell. For ease of explanation, the two battery cell bodies 221 are defined as the first battery cell body and the second battery cell body, which are sequentially distributed along the first direction. The terminal post group 3 corresponding to the first battery cell body can be located at the leftmost side of the first battery cell body, and the terminal post group 3 corresponding to the second battery cell body can be located at the rightmost side of the second battery cell body. In this case, the positive terminal post 31 and the negative terminal post 32 of the terminal post group 3 of the first battery cell body are located on the left side of the first battery cell body in the first direction, and the positive terminal post 31 and the negative terminal post 32 of the terminal post group 3 of the second battery cell body are located on the right side of the second battery cell body in the first direction.

[0085] Optionally, such as Figure 9 As shown, when there are two terminal post groups 3, for ease of explanation, the two terminal post groups 3 are defined as the first terminal post group and the second terminal post group. The first terminal post group corresponds to the first cell body, and the second terminal post group corresponds to the second cell body. The positive terminal post 31 and the negative terminal post 32 of the first terminal post group are located on the left side of the first cell body, and the positive terminal post 31 and the negative terminal post 32 of the second terminal post group are located on the right side of the second cell body, as shown. Figure 10 As shown, during charging, the current conduction direction inside the battery cell is as follows: from the positive terminal 31 of the first terminal group on the left, through the interior of the first battery cell body, back to the negative terminal 32 of the first terminal group. From the positive terminal 31 of the second terminal group on the right, through the interior of the second battery cell body, back to the negative terminal 32 of the second terminal group.

[0086] As can be seen, the battery cell body 221 has a structure with multiple sheet-like lead-out terminals 33 on the same side, and the positive terminal 31 and negative terminal 32 can be designed on the same side or opposite sides. For the same polarity design on the same side, the terminals 33 can be flexibly distributed on the cover plate 212 according to their actual required size and the height that can be manufactured. For the design with different polarities on the same side, not only can the current flow of the current collector 222 be increased, but the current direction can also be changed, shortening the current conduction path and effectively reducing heat generation.

[0087] In some specific embodiments of this application, the pole post 33 is welded to the corresponding current collector 222, thereby improving the connection strength between the pole post assembly 3 and the corresponding current collector 222.

[0088] According to one embodiment of this application, such as Figure 2 As shown, the pole 33 is in contact with the corresponding current collector 222 surface, and the flow area is increased by using a larger contact area.

[0089] In addition, as shown in Figure 18 The maximum length of the pole 33 can be defined as L1, the length of the cover plate 212 can be defined as L2, the gap between the pole 33 and the cover plate 212 can be defined as L3, the gap between two adjacent poles 33 can be defined as L4, and the number of poles 33 can be defined as N. The following formula can be used to determine the number and size of the sheet-shaped poles 33 on the cover plate 212: L1 = (L2 - L3 * 2 - (N - 1) L4) / N.

[0090] According to an embodiment of the present application, the heat transfer member includes a first heat conduction member 44 arranged on the first surface 213 and in thermal contact with the pole 33. The first heat conduction member 44 extends towards the position of the second surface 214 to transfer heat from the pole 33 to the second surface 214. In other words, since the first heat conduction member 44 extends substantially towards the second surface 214 and is in thermal contact with the pole 33, the heat near the first surface 213 can be transferred to the second surface 214 by arranging the pole 33 in thermal contact with the first heat conduction member 44. It should be noted that the heat transfer member in the present application can not only transfer heat from the pole 33, but also from the current collector and other components, that is, it can transfer heat from the pole 33 itself and the surrounding area.

[0091] In some embodiments of the present application, as shown in Figure 12 The number of single batteries 2 is multiple, and the first heat conduction member 44 is in thermal contact with the poles 33 of two adjacent single batteries 2, respectively. In other words, one first heat conduction member 44 can be used with two single batteries 2 at the same time, that is, two adjacent single batteries 2 can share one first heat conduction member 44, which improves the compactness of the structure.

[0092] Optionally, the plurality of single batteries 2 are arranged in sequence along a third direction, and the third direction can be the thickness direction of the single battery 2. The first heat conduction member 44 can be in heat conduction connection with the pole posts 33 of two single batteries 2 arranged adjacently in the third direction. For example, in the third direction, the number of single batteries 2 is two, which are divided into a first single battery and a second single battery, the first single battery has a first pole post group, and the second single battery has a second pole post group, one pole post 33 of the first pole post group is located on the left side of the first single battery, and one pole post 33 of the second pole post group is also located on the left side of the second single battery. Since the first single battery and the second single battery are arranged in sequence along the third direction, at least one pole post 33 of the first single battery and at least one pole post 33 of the second single battery are arranged adjacently in the third direction, and a gap is formed therebetween. The first heat conduction member 44 is arranged at the position of the gap, and one first heat conduction member 44 can realize heat conduction to the pole posts 33 of the two single batteries at the same time. Optionally, in the second direction, the length of the first heat conduction member 44 can be the same as or greater than the length of the pole post 33, and when the length is the same, the heat dissipation effect on the pole post 33 can be ensured, and when the length is greater than the length of the pole post 33, the heat of the pole post 33 can be transferred to a larger range.

[0093] Further, the first heat conduction member 44 is in surface contact with the pole post 33, which can increase the heat transfer effect.

[0094] In some embodiments of the present application, as shown in Figure 12 The battery pack 1000 further includes a connecting member 46, at least a part of the connecting member 46 is located between the heat sink 45 and the pole post 33, and is in heat conduction connection with the heat sink 45 and the pole post 33, respectively. By arranging the connecting member 46, the difficulty in installation and low firmness of the heat dissipation member and the pole post 33 are solved. When the pole post 33 is connected with the heat sink 45 through the connecting member 46, the heat sink 45 can be located on the outside of the connecting member 46, and the pole post 33 can be located on the inside of the connecting member 46.

[0095] According to one embodiment of the present application, the heat transfer member further comprises a first connecting portion 461, a second connecting portion 462 and a third connecting portion 463 connected in sequence, i.e. the connecting member 46 comprises the first connecting portion 461, the second connecting portion 462 and the third connecting portion 463. The first connecting portion 461, the second connecting portion 462 and the third connecting portion 463 cooperatively form a receiving groove, the connecting member 46 comprising the first connecting portion 461, the second connecting portion 462 and the third connecting portion 463 can cooperatively form a "Fang" shaped member, the receiving groove is used for accommodating the heat conducting member, the first connecting portion 461 is connected with the pole 33 of one of the two single batteries 2, the second connecting portion 462 is connected with the pole 33 of the other of the two single batteries 2, and the third connecting portion 463 is located between the first connecting portion 461 and the second connecting portion 462 and connected with the first connecting portion 461 and the second connecting portion 462 respectively.

[0096] That is, as shown in Figures 14 to 16 the connecting member 46 comprises the first connecting portion 461, the second connecting portion 462 and the third connecting portion 463, the first connecting portion 461 is connected with the pole 33 of one of the two single batteries 2 arranged adjacent in the third direction, the second connecting portion 462 is connected with the pole 33 of the other of the two single batteries 2 arranged adjacent in the third direction, the third connecting portion 463 is connected with the first connecting portion 461 and the second connecting portion 462 respectively, and cooperatively forms a receiving groove, the receiving groove is used for accommodating the first heat conducting member 44. For example, the third direction is the front-back direction, the first connecting portion 461 and the second connecting portion 462 can be distributed apart along the front-back direction, the third connecting portion 463 can be located between the first connecting portion 461 and the second connecting portion 462, and the rear end of the third connecting portion 463 is connected with the first connecting portion 461, and the front end of the third connecting portion 463 is connected with the second connecting portion 462. The first heat conducting member 44 is located between the first connecting portion 461 and the second connecting portion 462 and is in heat conducting connection with the first connecting portion 461, the second connecting portion 462 and the third connecting portion 463 respectively. In addition, the third connecting portion 463 is in heat conducting connection with the heat sink 45.

[0097] According to one embodiment of the present application, the heat transfer member further comprises a fourth connecting portion 464, the fourth connecting portion 464 is arranged at the end of the third connecting portion 463 close to the second surface 214, and the fourth connecting portion 464 is in heat conducting connection with the heat conducting member and the second surface 214 respectively.

[0098] That is, as shown in Figures 14 to 16As shown, the connecting piece 46 further comprises a fourth connecting portion 464, which is located on the same side of the third connecting portion 463 as the first connecting portion 461 and the second connecting portion 462, and is arranged at at least one end of the third connecting portion 463 in the second direction. The fourth connecting portion 464 can play a limiting role on the first heat conduction piece 44. Alternatively, the number of the fourth connecting portion 464 is two, one fourth connecting portion 464 is located at the upper end of the third connecting portion 463, and the other fourth connecting portion 464 is located at the lower end of the third connecting portion 463. As can be seen, through the first connecting portion 461, the second connecting portion 462, the third connecting portion 463 and the fourth connecting portion 464, the heat of the first heat conduction piece 44 can be conducted in multiple directions, so that the heat can be timely and efficiently transmitted to the heat spreader 45. For example, the fourth connecting portion 463 is in heat conduction connection with the cooler.

[0099] In some embodiments of the present application, the battery pack 1000 further comprises a heat spreader 45, at least a portion of which is arranged opposite to the first surface 213 and can exchange heat with the pole 33.

[0100] That is, the heat dissipation assembly comprises the heat spreader 45, which is located on the side of the pole 33 away from the cell body 221 in the first direction and is in heat conduction connection with the pole 33. That is, the heat spreader 45 is designed outside the pole 33, which can reduce the temperature rise of the pole 33.

[0101] According to one embodiment of the present application, the heat spreader 45 comprises at least one tubular piece, the tubular piece has a first fluid passage inside for the cooling fluid to flow, and a portion of the tubular piece forms at least a portion of the heat transfer piece. By adopting the structure of the tubular piece, the tubular piece has a relatively long length, which is beneficial on the one hand to enable one tubular piece to correspond to multiple poles 33, or even to multiple single batteries 2. For example, a portion of the tubular piece extends in the third direction, and multiple single batteries 2 are also arranged in the third direction in sequence, so that one tubular piece can correspond to the poles 33 of multiple single batteries 2. In this embodiment, by adopting the tubular piece as at least a portion of the heat spreader 45, not only can the extension direction of the tubular piece be easily controlled, but also when the tubular piece is at least a portion of the heat transfer piece, the heat near the pole 33 can be easily led out through the extension direction of the tubular piece; and moreover, it is beneficial to correspond to multiple poles 33 by one tubular piece, thereby improving the compactness of the structure and the utilization rate of parts. In addition, since the tubular piece has the first fluid passage inside, the fluid for cooling can be filled in the first fluid passage, and the exchange of heat between the heat spreader 45 and the pole 33 can be realized through the fluid with a temperature difference.

[0102] Optionally, the number of the tubular members is multiple, for example, the number of the tubular members is four, the four tubular members are arranged in sequence along the second direction, and a part of each tubular member can be arranged opposite to the first surface 213, wherein each two tubular members can form a loop. In the embodiment, by adopting multiple tubular members, the range of heat dissipation and temperature control can be increased.

[0103] In some embodiments of the present application, the battery pack 1000 further comprises a cooler which is in heat conduction connection with the second surface 214. By arranging the cooler near the second surface 214, the heat near the second surface 214 can be dissipated, and heat exchange of the heat gathered near the second surface 214 can be realized through the cooler. In addition, the cooler can also exchange heat of the second surface 214 itself. That is, by arranging the cooler near the second surface 214, not only the temperature near the first surface 213, especially the temperature near the pole 33, can be controlled through the heat transfer member cooperating with the cooler, and the pole 33 near the pole 33 can be timely dissipated, but also the second surface 214 can be dissipated, and the temperature of multiple positions on the shell 21 can be controlled.

[0104] According to an embodiment of the present application, the cooler is provided with a second fluid channel for the cooling fluid to flow, and the cooler is in heat conduction connection with the heat transfer member. That is, the cooler is provided with the second fluid channel, and the cooling fluid is loaded in the second fluid channel. Since the cooling fluid has a temperature difference with the second surface 214, and the fluid flow can be realized by cooperating with the fluid inlet and outlet, the heat near the second surface 214 can be quickly exchanged.

[0105] In addition, the cooler is provided with the second fluid channel, the radiator 45 is provided with the first fluid channel, and the second fluid channel is in communication with the first fluid channel. At this time, the cooler can be used as a liquid cooling plate. By loading the fluid in the radiator 45 and realizing the communication between the radiator 45 and the cooler, the heat dissipation effect of the position near the pole 33 can be improved.

[0106] According to an embodiment of the present application, the number of the coolers is two, and the single battery 2 is located between the two coolers. That is, one cooler is located on one side of the single battery 2 and corresponds to one second surface 214, and another cooler is located on the other side of the single battery 2 and corresponds to another second surface 214. It should be noted that one second surface 214 can correspond to one or multiple coolers, for example, two coolers are located on the upper side of the single battery 2, and one cooler is located on the lower side of the single battery 2. That is, as long as at least one cooler is arranged on each side of the single battery 2, no matter the number of the coolers corresponding to one side of the single battery 2 is one or multiple, it belongs to the protection scope of the present application.

[0107] For example, as shown in FIG. 6, the number of the tubular members is four, and the four tubular members are arranged in sequence along the second direction.Figure 11 As shown, the heat dissipation assembly includes two coolers, for the convenience of description, the two coolers are defined as a first cooler 41 and a second cooler 42, the first cooler 41 is arranged at one end of the single battery 2 in the second direction, and the second cooler 42 is arranged at the other end of the single battery 2 in the second direction. When the first direction extends in the horizontal direction and the second direction extends in the vertical direction, the first cooler 41 can be located above the single battery 2, and the second cooler 42 can be located below the single battery 2. The upper part of the single battery 2 can be heat-conducted by the first cooler 41, and the lower part of the single battery 2 can be heat-conducted by the second cooler 42.

[0108] As can be seen, in the embodiment, through the cooperation of the first cooler 41 and the second cooler 42, not only can a double-sided cooling sandwich cooling structure be formed on the single battery 2 to reduce the temperature difference in the height direction of the single battery 2, but also the prior art battery pack adopts a conventional single-sided cooling mode on the top or the bottom when achieving higher rate fast charging, which can cause a large temperature difference in the height direction of the single battery. In addition, the first cooler 41 and the second cooler 42 are arranged on the outer sides of the single battery 2 in the second direction in the embodiment, heat dissipation in the second direction is achieved, heat dissipation in the first direction is achieved in cooperation with the sheet-shaped pole 33, and heat near the pole 33 can be led out to the second surface 214 in cooperation with the heat transfer member, that is, multi-directional heat dissipation of the single battery 2 can be achieved.

[0109] In some specific embodiments of the present application, as shown in Figure 11 The heat dissipation assembly further includes a second heat-conducting member 43, and the second heat-conducting member 43 is in heat-conducting connection with the single battery 2 and the cooler respectively. That is, heat exchange between the single battery 2 and the cooler can be achieved through the second heat-conducting member 43. In the embodiment, by arranging the second heat-conducting member 43, on the one hand, damage to the single battery 2 caused by direct contact between the cooler and the single battery 2 is avoided, and on the other hand, the cooler does not need to be designed to be too large. In addition, when the number of single batteries 2 is multiple, one second heat-conducting member 43 can correspond to multiple single batteries 2.

[0110] According to one embodiment of the present application, as shown in Figure 11 The cooler and the second heat-conducting member 43 are sheet-shaped bodies respectively, and the second heat-conducting member 43 is in surface contact with the cooler and the single battery 2 respectively. For example, the upper end surface of the second heat-conducting member 43 is in contact with the lower end surface of the cooler, and the lower end surface of the second heat-conducting member 43 is in contact with the upper end surface of the single battery 2 respectively. The heat conduction area is improved through surface contact, and the force balance and heat dissipation balance of multiple positions on the single battery 2 are improved, and when the number of single batteries 2 is multiple, the force balance and heat dissipation balance of multiple single batteries 2 are improved.

[0111] According to an embodiment of the present application, the battery pack 1000 further comprises a tray, a receiving space is defined in the tray, the single battery 2 is located in the receiving space, and the heat transfer member, the heat sink 45, the cooler, and the like can also be located in the receiving space, as shown in Figure 11 and Figure 12 As shown, the heat sink 45 and the cooler are respectively in heat conduction connection with different positions on the single battery 2. By adopting the heat transfer member, the heat near the first surface 213 can be timely conducted out, the heat dissipation efficiency is improved, and the realization of rapid charging is facilitated.

[0112] According to an embodiment of the present application, at least one end of the receiving space is open along the axial direction thereof, and the cooler serves as the bottom plate or the top plate of the tray. For example, the first cooler 41 serves as the top plate of the tray, and the second cooler 42 serves as the bottom plate of the tray, which can improve the heat dissipation effect, and also can avoid the excessive height occupation space caused by the existence of the top plate, the bottom plate, the first cooler 41, and the second cooler 42 in the height direction at the same time.

[0113] According to an embodiment of the present application, the pole 33 is parallel to the third plane, for example, the length direction of the pole 33 extends along the second direction, and the height direction of the pole 33 extends along the first direction. That is to say, the pole 33 has a length direction and a height direction, the length direction of the pole 33 can be parallel to the second direction, and the height direction of the pole 33 can be parallel to the first direction. In the embodiment, by limiting the length direction and the height direction of the pole 33, the pole 33 is respectively connected with the current collector 222 and the external electrical equipment. In addition, by making the pole 33 parallel to the third plane, the contact area between the pole 33 and the first heat conduction member 44 is increased, and the heat transfer efficiency between the pole 33 and the first heat conduction member 44 is increased.

[0114] According to an embodiment of the present application, the connecting member 46 is welded with the pole 33, and the welding manner can increase the connection reliability. Further, the side surface of the sheet-shaped pole 33 is in surface contact with the connecting member 46, for example, the length direction of the pole 33 extends along the up-down direction, the height direction extends along the left-right direction, and the side surface of the pole 33 in the thickness direction of the cell body 221 is in contact with the side surface of the connecting member 46, which can increase the welding bonding area of the pole 33 and the connecting member 46. Alternatively, the connecting member 46 is bonded with the heat sink 45, which can improve the assembly efficiency.

[0115] Further, the first heat conduction member 44 is also in heat conduction connection with the current collector 222 corresponding to the pole 33, which improves the heat dissipation effect of the current collector 222.

[0116] Optionally, at least one end of the connecting piece 46 is in heat conduction connection with the cooler in the second direction. The first heat conduction piece 44 can be made of high-thermal-conductivity material, and when the first heat conduction piece 44 is arranged between the cover plate 212 and the connecting piece 46, the third connecting portion 463 can lead heat upward and / or downward along the cover plate 212 to the cooler, thereby increasing the heat dissipation amount. The heat of the pole piece 33 and the current collector 222 can be taken away by the connecting piece 46 as a whole, thereby improving the fast-charging capability, and the specific heat dissipation paths include but are not limited to the following:

[0117] Heat dissipation path one: current collector 222→first heat conduction piece 44→connecting piece 46→second heat conduction piece 43→cooler.

[0118] Heat dissipation path two: current collector 222→first heat conduction piece 44→connecting piece 46→heat sink 45.

[0119] In summary, according to the pole piece 33, the single battery 2 and the battery pack 1000 of the embodiments of the present application, the new sheet-shaped pole piece 33 structure and the design of the heat transfer piece matched with the high-thermal-conductivity path are adopted, thereby improving the large-ratio fast-charging capability. Different from the traditional two-pole battery cell with one positive pole and one negative pole, the sheet-shaped pole piece 33 is adopted in the present application, the space of the cover plate 212 is greatly utilized, the heat dissipation area of the current collector 222 is increased, and the overcurrent capacity of the battery cell 22 is improved; meanwhile, the design of the heat transfer piece and the design of the cooler and the heat sink are combined, for example, the cooler is arranged on two sides, the connecting piece 46 is matched with the heat sink 45, and the first heat conduction piece 44 is arranged between the connecting piece 46 and the cover plate 212 to take away the temperature rise of the pole piece 33, thereby improving the fast-charging capability of the power battery as a whole.

[0120] The present application also provides a vehicle including the battery pack 1000 of any of the above embodiments. Since the battery pack 1000 has good heat dissipation effect and improves the fast-charging capability, the vehicle of the present application also has the advantage of high fast-charging capability, and details are not repeated here.

[0121] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, but not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: A single battery cell includes a casing, a cell, and a plurality of terminals. The casing defines a receiving space, the cell is disposed in the receiving space, the casing has at least a first surface and a second surface, the terminals are disposed in the cell and extend from the first surface out of the casing, and at least one terminal is a sheet-like body. A heat transfer element capable of transferring heat from the single cell near the first surface to the second surface; The heat transfer component includes a heat-conducting component, which is disposed on the first surface and thermally connected to the electrode post. The heat-conducting component extends toward the location of the second surface to transfer the heat of the electrode post to the second surface. The number of individual cells is multiple, and the heat-conducting element is thermally connected to the terminals of two adjacent individual cells respectively. There is a gap between two adjacent terminals, and the heat-conducting element is disposed in the gap.

2. The battery pack according to claim 1, characterized in that, The housing has edges extending along a first direction, a second direction, and a third direction, the first direction and the second direction defining a first plane, the first direction and the third direction defining a second plane, and the second direction and the third direction defining a third plane; The first surface is connected to the second surface, and the first surface is parallel to the third plane, while the second surface is parallel to the second plane.

3. The battery pack according to claim 2, characterized in that, The surface area of ​​the second surface is greater than the surface area of ​​the first surface.

4. The battery pack according to claim 1, characterized in that, The heat transfer component further includes a first connecting portion, a second connecting portion, and a third connecting portion connected in sequence. The first connecting portion, the second connecting portion, and the third connecting portion cooperate to form a receiving groove for accommodating the heat-conducting component. The first connecting portion is connected to the terminal of one of the two individual cells, the second connecting portion is connected to the terminal of the other of the two individual cells, and the third connecting portion is located between the first connecting portion and the second connecting portion and is connected to both the first connecting portion and the second connecting portion.

5. The battery pack according to claim 4, characterized in that, The heat transfer component further includes a fourth connecting portion, which is located at the end of the third connecting portion near the second surface. The fourth connecting portion is thermally connected to the heat-conducting component and the second surface, respectively.

6. The battery pack according to any one of claims 1-5, characterized in that, Also includes: A heat sink, at least a portion of which is disposed opposite to the first surface and is capable of heat exchange with the pole post.

7. The battery pack according to claim 6, characterized in that, The radiator includes at least one tubular member having a first fluid passage for the flow of cooling fluid, and a portion of the tubular member being formed as at least a portion of the heat transfer element.

8. The battery pack according to any one of claims 1-5, characterized in that, Also includes: A cooler that is thermally connected to the second surface.

9. The battery pack according to claim 8, characterized in that, The cooler is provided with a second fluid channel for the flow of cooling fluid, and the cooler is thermally connected to the heat transfer element.

10. The battery pack according to claim 8, characterized in that, The number of coolers is two, and the individual battery is located between the two coolers.

11. The battery pack according to claim 2, characterized in that, The pole is parallel to the third plane.

12. A vehicle, characterized in that, Includes the battery pack described in any one of claims 1-11.

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