Battery pack and vehicle

Abstract

The application discloses a battery pack and a vehicle, the battery pack comprising a single battery, the single battery comprising a shell, an electric core and a plurality of pole columns, the shell having at least a first surface and a second surface, the shell defining an accommodating space inside, the electric core being arranged in the accommodating space, the electric core comprising a pole piece and a pole lug arranged on the pole piece, the pole column being arranged on the electric core and extending out of the shell from the first surface, the pole column comprising a first connecting piece, a protruding part and a second connecting piece, the first connecting piece being connected with the pole lug, the protruding part being arranged on the side of the first connecting piece away from the pole lug, the second connecting piece having a mounting through hole along the thickness direction of the second connecting piece, and the protruding part penetrating through the mounting through hole; and a heat transfer piece, the heat transfer piece performing heat transfer with the second connecting piece and the protruding part respectively, and the heat transfer piece being capable of transferring heat on the single battery close to the first surface to the second surface. The battery pack of the application can improve the heat dissipation effect of the pole column, thereby improving the fast charging capacity of the battery pack.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically, this application relates to a battery pack and a vehicle having the battery pack. Background Technology

[0002] Existing power battery systems use traditional cylindrical terminals. Since there is no heat dissipation structure on the outside of the terminals, the battery heats up significantly, which limits the battery's fast charging capability and hinders the development of batteries. Summary of the Invention

[0003] One objective of this application is to provide a battery pack that can solve the technical problem of limited fast charging capability of batteries in the prior art.

[0004] According to a first aspect of this application, a battery pack is provided, the battery pack comprising: a single battery cell, the single battery cell including a housing, a cell and a plurality of terminals, the housing having at least a first surface and a second surface, the housing defining an accommodating space, the cell being disposed in the accommodating space, the cell including an electrode and a tab disposed on the electrode, the terminal being disposed on the cell and extending from the first surface out of the housing, the terminal including a first connector, a protrusion and a second connector, the first connector being connected to the tab, the protrusion being disposed on the side of the first connector away from the tab, the second connector having a mounting through hole along its thickness direction, the protrusion passing through the mounting through hole; and a heat transfer member, the heat transfer member transferring heat to the second connector and the protrusion respectively, the heat transfer member being capable of transferring heat from the single battery cell near the first surface to the second surface.

[0005] According to an embodiment of this application, the heat transfer element contacts the second connector and the protruding surface, respectively.

[0006] According to an embodiment of this application, 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, the second surface is parallel to the second plane, and the surface area of ​​the second surface is greater than the surface area of ​​the first surface.

[0007] According to an embodiment of this application, in the third direction, the number of poles is multiple, and the heat transfer element includes: a first heat-conducting element, which is located between two adjacent poles and respectively transfers heat to the two poles.

[0008] According to an embodiment of this application, the heat transfer element includes: a radiator, at least a portion of which is disposed opposite to the first surface and is capable of heat exchange with the pole post, the radiator including at least one tubular member having a first fluid channel for cooling fluid to flow through.

[0009] According to an embodiment of this application, the heat transfer element further includes a second heat-conducting element, which is located between the heat sink and the electrode post, and on the orthographic projection of the first surface, one of the second heat-conducting elements covers at least two electrode posts.

[0010] According to an embodiment of this application, the battery pack further includes a mounting portion, which is disposed on the side of the second heat-conducting member near the heat sink and is used to mount the heat sink.

[0011] According to an embodiment of this application, the mounting portion has a mounting groove recessed inward along its surface, the mounting groove being used to mount the tubular member.

[0012] According to an embodiment of this application, the heat transfer component includes a cooler, which transfers heat to the second surface and the radiator respectively, and the cooler has a second fluid channel for cooling fluid to flow through it, and the second fluid channel is in communication with the first fluid channel.

[0013] According to an embodiment of this application, the number of coolers is two, and the single cell is located between the two coolers.

[0014] According to a second aspect of this application, a vehicle is provided that includes the battery pack of any of the above embodiments.

[0015] According to one embodiment of this disclosure, by using a single battery cell and a heat transfer component in combination, the heat of the first surface where the terminal post is located is guided to the vicinity of the second surface, thereby achieving rapid cooling of the terminal post, improving the cooling effect of the single battery cell, improving cooling efficiency, and improving fast charging capability.

[0016] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0018] Figure 1 This is a partial exploded view of a single cell battery according to an embodiment provided in this application;

[0019] Figure 2 yes Figure 1 A magnified view of area A, indicated by the center circle;

[0020] Figure 3 This is a schematic diagram of the assembly of the tab and the post according to one embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the current flow direction of a single cell battery according to an embodiment of this application;

[0022] Figure 5 This is a partial exploded view of a battery pack according to yet another embodiment provided in this application;

[0023] Figure 6 This is a schematic diagram of the current flow direction of a single cell battery according to an embodiment of this application;

[0024] Figure 7 This is a partial structural diagram of a battery pack according to an embodiment of this application;

[0025] Figure 8 yes Figure 7 The center circle shows an enlarged view of area B;

[0026] Figure 9 This is an assembly diagram of a heat sink according to an embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the mounting section and the first heat-conducting element according to one embodiment of this application;

[0028] Figure 11 This is an assembly diagram of the mounting section, the first heat-conducting component, and the pole post according to one embodiment of this application;

[0029] Figure 12 This is an assembly diagram of the first heat-conducting component and the two pole pieces of this application;

[0030] Figure 13 This is a partial exploded view of a battery pack according to an embodiment of this application;

[0031] Figure 14 yes Figure 13 A magnified view of region C, shown in the middle circle.

[0032] Figure Labels

[0033] Battery pack 1000;

[0034] 2. Single battery cell; 21. Casing; 211. Side plate; 212. Cover plate; 22. Cell; 221. Electrode; 222. Terminal assembly; 3. Positive terminal; 31. Negative terminal; 32. Terminal; 33. First connector; 331. Protrusion; 332. Second connector; 333. Third connector; 334.

[0035] First cooler 41; Second cooler 42;

[0036] Mounting part 43; Mounting groove 431;

[0037] First heat-conducting component 44; radiator 45; second heat-conducting component 46. Detailed Implementation

[0038] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0041] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0043] The battery pack 1000 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0044] like Figures 1 to 14 As shown, this application provides a battery pack 1000, which includes a single battery cell 2 and a heat transfer element.

[0045] Specifically, the single battery cell 2 includes a housing 21, a cell 22, and a plurality of terminals 33. The housing 21 has at least a first surface and a second surface, and a receiving space is defined inside the housing 21. The cell 22 is disposed in the receiving space and includes an electrode 221 and a tab 222 disposed on the electrode 221. The terminals 33 are disposed on the cell 22 and extend out of the housing 21 from the first surface. The terminals 33 include a first connector 331, a protrusion 332, and a second connector 333. The first connector 331 is connected to the tab 222. The protrusion 332 is disposed on the side of the first connector 331 away from the tab 222. The second connector 333 has a mounting through hole along its thickness direction. The protrusion 332 passes through the mounting through hole. A heat transfer member transfers heat to the second connector 333 and the protrusion 332 respectively. The heat transfer member can transfer heat on the single battery cell 2 near the first surface to the second surface.

[0046] In other words, the battery pack 1000 according to the embodiments of this application mainly consists of individual battery cells 2 and heat transfer components. The individual battery cell 2 includes a housing 21, a cell 22, and at least one terminal block 3. The housing 21 has a receiving space, the cell 22 is located within the receiving space of the housing 21, and the terminal block 3 is disposed on the cell 22 and extends out of the housing 21. The terminal block 3 includes a positive terminal block 31 and a negative terminal block 32. The number of terminal blocks 3 on an individual battery cell 2 can be one or more. The number of individual battery cells 2 can also be one or more, and is not limited here. The cell 22 includes an electrode plate 221 and a tab 222, with the tab 222 disposed on the electrode plate 221.

[0047] The outer surface of the housing 21 includes a first surface and a second surface. The electrode post 33 is disposed on the cell 22 and extends out of the housing 21 from the first surface. That is, the electrode post 33 corresponds to the first surface and extends out of the first surface.

[0048] In this application, the positive electrode post 31 and the negative electrode post 32 can be cylindrical electrode posts 33. Specifically, as shown... Figure 11 and Figure 14 As shown, the pole post 33 includes a first connector 331, a protrusion 332, and a second connector 333. The first connector 331 can be connected to the tab 222. The protrusion 332 is provided on the first connector 331 and located on the side of the first connector 331 away from the tab 222. The second connector 333 has a through mounting hole through which the protrusion 332 can pass. The housing 21 can be divided into a side plate 211 and a cover plate 212. The cover plate 212 has a first surface and a through hole. The first connector 331 of the pole post 33 is installed in the through hole, and the protrusion 332 passes through the mounting hole of the second connector 333. In this case, the first connector 331 can be located inside the cover plate 212, and the second connector 333 can be located outside the cover plate 212.

[0049] Furthermore, the heat transfer component can transfer heat from the location near the first surface of the individual battery cell 2 to the vicinity of the second surface. That is, the heat transfer component can be thermally connected to the individual battery cell 2, for example, thermally connected to the casing 21 or thermally connected to the terminal post 33, without limitation. Thermal connection in this application refers to heat transfer between components, including not only direct connections but also indirect connections, without limitation. Specifically, the heat transfer component can transfer heat between itself and the second connector 333 and the protrusion 332 respectively, thereby drawing out heat near the terminal post 33, which facilitates a rapid temperature drop near the terminal post 33 and thus promotes fast charging.

[0050] Optionally, the battery pack 1000 may also include a tray, within which a receiving space is defined, the receiving space having a accommodating function and capable of accommodating a single battery cell 2.

[0051] Therefore, the battery pack according to the embodiments of this application, by using a single battery cell 2 and a heat transfer component in combination, guides the heat of the first surface where the terminal post 33 is located to the vicinity of the second surface, thereby achieving rapid cooling of the terminal post 33, thereby improving the cooling effect of the single battery cell, improving cooling efficiency, and improving fast charging capability.

[0052] According to one embodiment of this application, the heat transfer member is in surface contact with the second connector 333 and the protrusion 332, respectively. By adopting a surface-to-surface contact method, the contact area can be increased, thereby further improving the heat transfer efficiency. In addition, when the battery pack 1000 is subjected to an impact, uneven pressure from the heat transfer member 333 on the surrounding second connector 333 and protrusion 332 can be avoided.

[0053] In some specific embodiments of this application, the housing 21 has edges extending along a first direction, a second direction, and a third direction. The first direction and the second direction define a first plane, the first direction and the third direction define a second plane, and the second direction and the third direction define a third plane. A first surface is connected to a second surface, and the first surface is parallel to the third plane. The second surface is parallel to the second plane, and the surface area of ​​the second surface is greater than the surface area of ​​the first surface.

[0054] In other words, such as Figure 1As shown, the housing 21 has a first edge extending along a first direction, a second edge extending along a second direction, and a third edge extending along a third direction. The first and second directions can be used to define a first plane, the first and third directions can be used to define a second plane, and the second and third directions can be used to define a third plane. For example, if the first direction is the X-axis, the second direction is the Z-axis, and the third direction is the Y-axis, then the first plane is the XZ plane, the second plane is the XY plane, and the third plane is the YZ plane.

[0055] Furthermore, the first surface is connected to the second surface, i.e., the first surface and the second surface are mated. The first surface is parallel to the third plane, and the area of ​​the second surface is larger than the surface area of ​​the first surface. For example, the first surface is parallel to the YZ plane, and the second surface is parallel to the XY plane. Optionally, the housing 21 also has a third surface, which can be parallel to the XZ plane. When the shape of the cell 22 is a cuboid, the number of the first, second, and third surfaces can each be two. The second surface extends horizontally, and the first and third surfaces extend vertically. The two third surfaces are spaced apart in the front-back direction, the two first surfaces are spaced apart in the left-right direction, and the two second surfaces are spaced apart in the up-down direction. In this case, the electrode post 33 is led out from the first surface on the side.

[0056] It should be noted that when the surface area of ​​the second surface is greater than the surface area of ​​the first surface, the following situations may be included: the dimension of the housing 21 in the first direction is greater than the dimension in the second direction and the third direction, that is, the length of the first edge is greater than the length of the second edge and the third edge.

[0057] According to one embodiment of this application, the electrode assembly 3 is located on the side of the single cell 2 in the first direction, that is, the electrode assembly 3 is disposed on the first surface. Since the dimension of the single cell 2 in the first direction is larger than the dimension in the second direction, and the area of ​​the first surface is smaller than the area of ​​the second surface, disposing of the electrode assembly 3 on the side in the first direction avoids the space of the single cell 2 extending in the second direction being reduced due to the electrode assembly 3 being disposed on the side in the second direction, and also avoids occupying the space on the side extending in the first direction, thereby improving the battery capacity. It should be noted that here, the positive electrode 31 and the negative electrode 32 of the electrode assembly 3 can be located at opposite ends of the single cell 2 in the first direction, or the positive electrode 31 and the negative electrode 32 of the electrode assembly 3 can be located at one end of the single cell 2 in the first direction.

[0058] In some specific embodiments of this application, in the first direction, such as Figure 4 and Figure 6As shown, multiple terminals 33 are provided on the same end of the single cell 2. By increasing the number of terminals 33 on the same side of the single cell 2, the total area of ​​the terminals 33 can be increased, and the current flow area between the terminals 33 and the current collector of the single cell 2 can be increased, thereby improving the fast charging capability of the battery pack 1000 of this application.

[0059] In some specific embodiments of this application, such as Figure 7 As shown, the cooler is a plate-shaped body, and the side of the cooler is arranged opposite to the outer surface of the housing 21. By adopting a surface-to-surface arrangement, the heat exchange area can be expanded, the heat exchange efficiency can be improved, and the heat generation of the single cell 2 can be quickly controlled.

[0060] Optionally, the single cell 2 has a large surface, a side surface, and a top surface. The top surface is a small surface, the large surface is a third surface, the side surface is a first surface, and the top surface is a second surface. The area of ​​the large surface is larger than the area of ​​the small surface and the side surface. By connecting the top surface to the cooler for heat conduction, the large surface can be prevented from being squeezed due to its large degree of thermal expansion. In addition, when there are multiple single cells 2, the multiple single cells 2 are arranged side by side, and one cooler can correspond to multiple single cells 2, reducing production costs.

[0061] According to one embodiment of this application, the receiving space of the tray is open at least one end along its axial direction, and the cooler serves as the bottom or top plate of the tray. That is, the cooler can be a liquid-cooled plate, and the liquid-cooled plate can also serve as the bottom and / or top plate of the tray.

[0062] According to one embodiment of this application, in the third direction, there are multiple electrode posts 33, and the heat transfer element includes a first heat-conducting element 44, which is located between two adjacent electrode posts 33 and respectively transfers heat to the two electrode posts 33. The two adjacent electrode posts 33 may belong to one single cell 2 or to different single cells 2.

[0063] For example, such as Figure 7 As shown, any two of the third direction, the second direction, and the first direction are perpendicular to each other. There are multiple individual cells 2, arranged sequentially along the third direction. There is a gap between the terminals 33 of adjacent individual cells 2. Figure 11 and Figure 12As shown, the first heat-conducting element 44 is disposed in the gap and is thermally connected to both terminals 33. The first direction can be the length direction of the individual battery cell 2, the second direction can be the height direction of the individual battery cell 2, and the third direction can be the thickness direction of the individual battery cell 2. That is, multiple individual batteries 2 are arranged sequentially along the third direction, each individual battery cell 2 has a terminal 33, and there can be a gap between the terminal 33 of two adjacent cells. The first heat-conducting element 44 can be disposed within this gap, and heat transfer between the two terminals 33 can be achieved through one first heat-conducting element 44.

[0064] Furthermore, when the first heat-conducting element 44 is fitted with the pole post 33, the pole post 33 can be installed on the housing 21 through the second connector 333. The second connector 333 is thermally connected to the first heat-conducting element 44, which is beneficial to realize the heat transfer between the first heat-conducting element 44 and the pole post 33 located in the gap.

[0065] According to one embodiment of this application, such as Figure 11 and Figure 14 As shown, the second connector 333 is a plate-shaped component. For example, the second connector 333 extends in the vertical direction, the cover plate 212 also extends in the vertical direction, and the first heat-conducting component 44 also extends in the vertical direction. By using a plate-shaped component, the contact area between the second connector 333 and the first heat-conducting component 44 can be increased, and the connection between the second connector 333 and the cover plate 212 can be strengthened while occupying less space.

[0066] According to one embodiment of this application, the pole post 33 further includes a third connector 334. The third connector 334 is disposed on the outside of the cover plate 212 and located between the cover plate 212 and the second connector 333. By providing the third connector 333, the firmness of the second connector 333 can be improved, preventing the second connector 333 and the cover plate 212 from shaking due to the existence of a gap. Optionally, the second connector 333 and the third connector 334 can be plate-shaped parts, further ensuring the installation firmness between the pole post 33 and the cover plate 212.

[0067] In some specific embodiments of this application, such as Figure 8 and Figure 9 As shown, the heat transfer component includes a heat sink 45, at least a portion of which is disposed opposite to the first surface and is capable of heat exchange with the terminal post 33. The heat sink 45 includes at least one tubular member with a first fluid channel for the flow of cooling fluid. In other words, by providing the heat sink 45, the temperature near the terminal post 33 can be controlled, thereby improving the fast charging capability of the battery pack 1000 using the terminal post 33 of this application.

[0068] According to one embodiment of this application, such as Figure 9 and Figure 14As shown, the heat transfer component also includes a second heat conductor 46, which is located between the radiator 45 and the pole post 33. On the orthographic projection of the first surface, one second heat conductor 46 covers at least two pole posts 33.

[0069] In other words, the second heat-conducting element 46 can be thermally connected to the heat sink 45 and the pole 33 respectively. The second heat-conducting element 46 can transfer heat. By using the second heat-conducting element 46 between the heat sink 45 and the pole 33, on the one hand, the complex connection structure caused by the direct connection between the heat sink 45 and the pole 33 can be avoided. On the other hand, the structure can be simplified by having the second heat-conducting element 46 correspond to multiple poles 33.

[0070] Optionally, the inner surface of the second heat-conducting element 46 can be in contact with the electrode 33 and the first heat-conducting element 44, and the outer surface of the second heat-conducting element 46 can be disposed opposite to the heat sink 45. Thus, heat transfer between the first heat-conducting element 44, at least one electrode 33, and the heat sink 45 can be achieved simultaneously through the second heat-conducting element 46.

[0071] In some specific embodiments of this application, such as Figure 10 As shown, the battery pack 1000 also includes a mounting portion 43, which is located on the side of the second heat-conducting member 46 near the heat sink 45 and is used to mount the heat sink 45. That is, as... Figure 10 As shown, the second heat-conducting component 46 has a mounting portion 43 on the side near the heat sink 45, such as... Figure 9 As shown, the mounting part 43 can be used to mount the heat sink 45. During assembly, the heat sink 45 can be mounted on the mounting part 43, thereby limiting the degree of freedom between the heat sink 45 and the second heat-conducting element 46. The mounting part 43 includes, but is not limited to, a snap-fit ​​structure, which improves assembly efficiency.

[0072] Optionally, the mounting surface of the mounting part 43 can be fitted with the outer surface of the second heat-conducting element 46. By adopting a surface-to-surface fitting method, the installation firmness, heat conduction efficiency and heat conduction effect are improved.

[0073] In some specific embodiments of this application, the mounting portion 43 has a mounting groove 431 recessed inward along its surface, which is used to mount tubular components. That is, by providing the mounting groove 431 on the mounting portion 43, the heat sink 45 can be a long strip-shaped component, which can be snapped into the mounting groove 431. In other words, during assembly, the long strip-shaped heat sink 45 can be snapped into the mounting groove 431. Optionally, there can be multiple heat sinks 45, each corresponding to a different mounting groove 431. Increasing the number of heat sinks 45 improves heat dissipation. Furthermore, providing multiple mounting portions 43 on a single second heat-conducting component 46 simplifies the structure. Optionally, the multiple heat sinks 45 are spaced apart along the second direction, with the electrode post 33 located at the end of the cell 22 in the first direction. This facilitates increasing the maximum size of the cell 22 in the second direction, increasing battery capacity, and allows the casing 21 to have a larger area for thermal connection with the cooler.

[0074] According to one embodiment of this application, the heat transfer element includes a cooler. In this embodiment, the positional relationship between the terminal post 33 and the cooler is not limited. The terminal post 33 can be located at the end of the single cell 2 in the first direction or at the end in the second direction. That is to say, as long as the heat near the terminal post 33 can be cooled by the cooler, it falls within the protection scope of this application.

[0075] According to another embodiment of this application, the heat transfer component includes a cooler that transfers heat to both the second surface and the radiator 45. The cooler has a second fluid channel for the flow of cooling fluid, and this second fluid channel is connected to a first fluid channel. In this embodiment, the cooler can transfer heat between the second surface and the radiator 45. The second fluid channel within the cooler allows cooling fluid to flow, improving heat dissipation efficiency. Furthermore, the second fluid channel is connected to the first fluid channel, meaning that the cooling medium can flow between the first and second fluid channels, enhancing heat exchange and facilitating the transfer of heat from the first surface to the vicinity of the second surface.

[0076] According to one embodiment of this application, the number of coolers is at least two, with the individual battery 2 located between the two coolers. For ease of explanation, the coolers can be divided into a first cooler 41 and a second cooler 42, wherein the first cooler 41 is located on one side of the individual battery 2, and the second cooler 42 is located on the other side of the individual battery 2. By cooperating with the first cooler 41 and the second cooler 42, a double-sided cooling structure can be formed, thereby reducing the temperature difference between the two sides of the individual battery 2.

[0077] In this embodiment, by employing at least two coolers in combination, double-sided cooling is achieved, thereby improving the cooling of the single battery cell 2 using the electrode post 33 of this application, improving cooling efficiency, and improving fast charging capability.

[0078] In some specific embodiments of this application, such as Figure 1 As shown, the first cooler 41 can be disposed at one end of the single cell 2 in the second direction, and the second cooler 42 can be disposed at the other end of the single cell 2 in the second direction. For example, if the first direction of the single cell 2 is the length direction and the second direction is the height direction, disposing the first cooler 41 on the upper side of the single cell 2 and the second cooler 42 on the lower side of the single cell 2 can reduce the temperature difference in the height direction of the single cell 2.

[0079] In some specific embodiments of this application, a single cell 2 includes a plurality of electrode groups 3, which are located on the same side or opposite side of the single cell 2.

[0080] For example, a single cell 2 includes an electrode assembly 3, which includes a positive electrode 31 and a negative electrode 32. The positive electrode 31 and the negative electrode 32 can be located on the same side or opposite sides of the single cell 2. Regardless of whether they are located on the same side or opposite sides of the single cell 2, the two coolers can be arranged on both sides of the single cell 2. They can be located simultaneously on the same side in the first direction or the second direction, or they can be located on opposite sides in the first direction or the second direction; no limitation is made here.

[0081] When a single cell 2 includes multiple electrode groups 3, the multiple electrode groups 3 can be located on the same side or opposite sides of the single cell 2, without limitation. For example, Figure 6 As shown, a single cell 2 has two terminal sets 3, divided into a first terminal set and a second terminal set. The positive terminal 31 and negative terminal 32 of the first terminal set and the second terminal set are located on the same side of the single cell 2, or as shown in the diagram. Figure 4 As shown, the positive electrode 31 of the first electrode group and the positive electrode 31 of the second electrode group are located on one side of the single cell 2, and the negative electrode 32 of the first electrode group and the negative electrode 32 of the second electrode group are located on the other side of the single cell 2.

[0082] When there are multiple individual cells 2, each individual cell 2 includes at least one set of terminals 3. For example, if there are two individual cells 2, and they are distributed sequentially along the first direction, for ease of explanation, the two individual cells 2 are referred to as a first individual cell and a second individual cell, as follows: Figure 12 As shown, the terminal block 3 of the first single cell is located on the left side of the first single cell, and the terminal block 3 of the second single cell is located on the right side of the second single cell.

[0083] In summary, the battery pack 1000 according to the embodiments of this application can quickly cool down the heat near the terminal post 33 of this application through the heat transfer member. In addition, by using two coolers, the single cell 2 with the terminal post 33 of this application can be cooled on both sides, reducing the temperature difference between the two sides of the single cell 2, improving the heat dissipation effect, and helping to improve the fast charging capability of the single cell 2 using the conventional terminal post 33.

[0084] This application also proposes a vehicle that includes the battery pack 1000 of any of the above embodiments. Since the battery pack 1000 has good heat dissipation and improves fast charging capability, the vehicle of this application also has the advantage of high fast charging capability, which will not be elaborated upon here.

[0085] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: A single-cell battery includes a casing, a cell, and multiple terminals. The casing has at least a first surface and a second surface, and defines an accommodating space within the casing. The cell is disposed within the accommodating space and includes an electrode sheet and a tab disposed on the electrode sheet. The terminals are disposed on the cell and extend from the first surface out of the casing. Each terminal includes a first connector, a protrusion, and a second connector. The first connector is connected to the tab, and the protrusion is disposed on the side of the first connector away from the tab. The second connector has a mounting through hole along its thickness direction, and the protrusion passes through the mounting through hole. A heat transfer element, which transfers heat to the second connector and the protrusion respectively, and the heat transfer element is capable of transferring heat from the single cell near the first surface to the second surface; The heat transfer component includes: a radiator, at least a portion of which is disposed opposite to the first surface and is capable of heat exchange with the pole post; the radiator includes at least one tubular component and has a first fluid channel for cooling fluid to flow through; and a cooler, which transfers heat to the second surface and the radiator respectively, and has a second fluid channel for cooling fluid to flow through, the second fluid channel being connected to the first fluid channel. 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; The number of individual battery cells is multiple, and the multiple individual battery cells are distributed along a third direction. Along this third direction, the number of electrode posts is multiple, and the heat transfer component further includes: A first heat-conducting element is located between the terminals of two adjacent individual cells and transfers heat to the terminals of the two individual cells respectively. A second heat-conducting element is located between the heat sink and the electrode post. On the orthographic projection of the first surface, one of the second heat-conducting elements covers at least two electrode posts.

2. The battery pack according to claim 1, characterized in that, The heat transfer element contacts the second connector and the protruding surface, respectively.

3. The battery pack according to claim 1, 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, Also includes: The mounting part is located on the side of the second heat-conducting element near the heat sink and is used to mount the heat sink.

5. The battery pack according to claim 4, characterized in that, The mounting portion has a mounting groove recessed inward along its surface for mounting the tubular component.

6. The battery pack according to claim 1, characterized in that, The number of coolers is two, and the individual battery is located between the two coolers.

7. A vehicle, characterized in that, Includes the battery pack described in any one of claims 1-6.

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