Battery Pack and Vehicle

Abstract

The present application provides a battery pack and a vehicle. The vehicle includes the battery pack, and the battery pack includes at least two battery cells, an assemblable frame assembly, connection pieces, an insulating and heat-conducting member, and a heat dissipation member. The at least two battery cells are arranged along the thickness direction of the battery cells, and pole columns are respectively arranged at opposite ends of each battery cell along its length direction. The assemblable frame assembly surrounds the at least two battery cells circumferentially. The assemblable frame assembly includes longitudinal beams, cross beams, and connecting members. Two opposite longitudinal beams are respectively connected at both ends of the cross beam through the connecting members. The connection pieces connect the same-side pole columns of adjacent two battery cells. The heat dissipation member extends along the thickness direction of the battery cells. The heat dissipation member is connected to the connection pieces through the insulating and heat-conducting member. A first flow channel is arranged in the heat dissipation member and extends along the thickness direction of the battery cells. The insulating and heat-conducting member is used for conducting the heat generated by the battery cells to the heat dissipation member. The first flow channel of the heat dissipation member allows a cooling liquid to flow through to dissipate heat from the battery cells. Both ends of the heat dissipation member are respectively connected to two opposite longitudinal beams.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack and a vehicle. Background Art

[0002] With the development of charging technology, the technology for improving the battery charging speed is constantly progressing. When the charging system performs fast charging, the current carried by the connecting piece in the battery pack is increased compared with that in the normal charging mode, which will cause the overcurrent temperature of the connecting piece itself to rise; at the same time, fast charging will also cause the temperature of the current collector of the battery cell to rise, and the temperature of the current collector is transmitted to the terminal post and then to the connecting piece. Since the heat dissipation speed of the connecting piece itself in the traditional battery pack is slow, the temperature of the connecting piece will also rise, which limits the fast charging ability of the device using the battery pack, and the increase in the temperature of the connecting piece is likely to cause the temperature difference between the battery cells in the battery pack to increase and shorten the service life of the battery pack. In addition, in the prior art, the frame that plays a role in supporting and protecting the battery cells is usually integral, so the production accuracy requirements are very high, and thus the production deviation tolerance is very small, which is not conducive to production and manufacturing. Summary of the Invention

[0003] Therefore, the present application provides a battery pack and a vehicle to solve the above technical problems.

[0004] In a first aspect of the present application, a battery pack is provided, including:

[0005] At least two battery cells, the at least two battery cells are arranged along the thickness direction of the battery cells, and pole posts are respectively arranged at opposite ends of each battery cell along its length direction, wherein the length direction is perpendicular to the thickness direction;

[0006] An assemblable frame assembly, the assemblable frame assembly is circumferentially arranged around the at least two battery cells, the assemblable frame assembly includes longitudinal beams, cross beams and connecting pieces, the longitudinal beams extend along the length direction, the cross beams extend along the thickness direction, and both ends of the cross beam are respectively connected to two opposite longitudinal beams through the connecting pieces;

[0007] Connecting pieces, the connecting pieces connect the same-side pole posts of adjacent two battery cells;

[0008] Insulating and heat-conducting members, the insulating and heat-conducting members extend along the thickness direction of the battery cells;

[0009] A heat dissipation component, the heat dissipation component extends along the thickness direction of the battery cell, the heat dissipation component is connected to the connection piece through the insulating and heat-conducting component, a first flow channel is arranged in the heat dissipation component, the first flow channel extends along the thickness direction of the battery cell, the insulating and heat-conducting component is used to conduct the heat generated by the battery cell to the heat dissipation component, the first flow channel of the heat dissipation component allows a cooling liquid to flow through to dissipate heat from the battery cell, and two opposite longitudinal beams are respectively connected to both ends of the heat dissipation component.

[0010] The second aspect of the present application provides a vehicle, including the above battery pack.

[0011] In the present application, the connection piece connects the same-side pole columns of two adjacent battery cells, the insulating and heat-conducting component is arranged between the connection piece and the heat dissipation component, and a first flow channel is arranged in the heat dissipation component. Therefore, when the cooling liquid flows through the first flow channel, it can dissipate heat from the connection piece, thereby further reducing the temperatures of the pole column and the battery cell connected to the connection piece, prolonging the service life of the battery pack, and improving the fast charging ability of the vehicle; at the same time, the frame that plays a role in supporting and protecting the battery cell is an assembled frame component, and the longitudinal beam and the cross beam in the assembled frame component are connected through the connecting piece. Therefore, the production dimension accuracy requirements for the longitudinal beam and the cross beam can be appropriately reduced, the tolerance of production dimension deviation is increased, which is more conducive to production and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is an exploded view of the structure of a battery pack provided by an embodiment of the present application;

[0014] Figure 2 It is a schematic diagram of the structure of a battery pack provided by an embodiment of the present application;

[0015] Figure 3 is Figure 1 a partial enlarged view of part C in;

[0016] Figure 4 It is an exploded view of the structure of a battery cell provided by an embodiment of the present application;

[0017] Figure 5 It is a schematic diagram of the connection between the pole column of a battery cell and a connection piece provided by an embodiment of the present application;

[0018] Figure 6Schematic diagram of the left cross-section of the heat dissipation component provided by an embodiment of the present application;

[0019] Figure 7 is Figure 2 Schematic diagram of the cross-section at the battery packs D1 - D2 in

[0020] Figure 8 Top view of the battery pack without battery cells provided by an embodiment of the present application;

[0021] Figure 9 Another embodiment of the present application Figure 2 Schematic diagram of the cross-section at the battery packs D1 - D2 in

[0022] Figure 10 Structural block diagram of the vehicle in an embodiment of the present application. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0024] In the description of the present application, unless otherwise clearly defined and limited, the term "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two components; it may be a communication connection; it may be an electrical connection. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific circumstances.

[0025] Please refer to Figures 1 - 6 , Figure 1 Exploded structural diagram of the battery pack provided by an embodiment of the present application; Figure 2 Structural diagram of the battery pack provided by an embodiment of the present application; Figure 3 is Figure 1 Partial enlarged view of part C in Figure 4 Exploded structural diagram of the battery cell provided by an embodiment of the present application; Figure 5 Schematic diagram of the connection between the battery cell terminal and the connecting piece provided by an embodiment of the present application; Figure 6 Schematic diagram of the left cross-section of the heat dissipation component provided by an embodiment of the present application.

[0026] As Figures 1 - 6 shown, the battery pack 1 includes:

[0027] At least two battery cells, the at least two battery cells being arranged along the thickness direction A of the battery cell 10, and pole posts 11 being respectively arranged at opposite ends of each battery cell 10 along its length direction B, wherein the length direction B is perpendicular to the thickness direction A.

[0028] An assemblable frame assembly 20, the assemblable frame assembly 20 circumferentially surrounding the at least two battery cells, the assemblable frame assembly 20 including longitudinal beams 21, cross beams 22 and connecting members 23 (as Figure 3 shown), the longitudinal beams 21 extending along the length direction B, the cross beams 22 extending along the thickness direction A, and two opposite longitudinal beams 21 being respectively connected at both ends of the cross beam 22 through the connecting members 23.

[0029] A connecting piece 30 (as Figure 4 and Figure 5 shown), the connecting piece 30 connecting the same-side pole posts 11 of two adjacent battery cells 10.

[0030] An insulating and heat-conducting member 40, the insulating and heat-conducting member 40 extending along the thickness direction A of the battery cell 10.

[0031] A heat-dissipating member 50, the heat-dissipating member 50 extending along the thickness direction A of the battery cell 10, the heat-dissipating member 50 being connected to the connecting piece 30 through the insulating and heat-conducting member 40, a first flow channel 51 (as Figure 6 shown) being arranged in the heat-dissipating member 50, the first flow channel 51 extending along the thickness direction A of the battery cell 10, the insulating and heat-conducting member 40 being used for conducting the heat generated by the battery cell 10 to the heat-dissipating member 50, the first flow channel 51 of the heat-dissipating member 50 allowing a cooling liquid to flow through to dissipate heat from the battery cell 10, and both ends of the heat-dissipating member 50 being respectively connected to two opposite longitudinal beams 21.

[0032] In this application, if there is no other heat dissipation system in the battery pack 1, the battery cells 10 in the battery pack 1 can only dissipate heat by themselves. During charging and discharging, the temperature of the battery cells 10 rises, and temperature unevenness will occur among the battery cells 10. Moreover, if the temperature of the battery cells 10 is too high, the interfacial stability of the positive and negative electrodes will be reduced. This leads to a significantly higher degradation rate of the battery cells 10 with higher temperature than that of the battery cells 10 with lower temperature, thereby shortening the lifespan of the entire battery pack 1. Therefore, the factors affecting the lifespan of the battery pack 1 are not only the standard lifespan values of the individual battery cells 10 in the standard environment, but also the different change values of the lifespans among the battery cells 10 due to temperature unevenness in the battery pack 1 after multiple battery cells 10 are integrated into the battery pack 1. In this application, the heat dissipation component 50 containing the first flow channel 51 is connected to the connection piece 30 through the insulating heat conducting component 40. Since the heat inside the battery cell 10 will be conducted to the connection piece 30, when the cooling liquid flows through the first flow channel 51 of the heat dissipation component 50, the connection piece 30 can be dissipated heat, and further, the battery cell 10 can be dissipated heat. Therefore, the heat dissipation component 50 containing the first flow channel 51 can dissipate heat for each battery cell 10 in the battery pack 1, reduce the temperature of the battery cells 10, and extend the lifespan of the battery cells 10. In addition, since the heat dissipation effect of the heat dissipation component 50 is better than that of the battery cells 10 dissipating heat by themselves, heat dissipation through the heat dissipation component 50 is the main heat dissipation path for the battery cells 10 in the battery pack 1. Thus, heat dissipation through the heat dissipation component 50 can also reduce the temperature difference among the battery cells 10 in the battery pack 1, and further reduce the difference in the change values of the lifespans among the battery cells 10 due to temperature unevenness among the battery cells 10 in the battery pack 1, thereby extending the service life of the battery pack 1. At the same time, the frame that supports and protects the battery cells 10 is the assembled frame assembly 20. The longitudinal beam 21 and the cross beam 22 in the assembled frame assembly 20 are connected through the connecting piece 23. Therefore, the production dimension accuracy requirements for the longitudinal beam 21 and the cross beam 22 can be appropriately reduced, and the production dimension tolerance degree can be increased, which is more conducive to production and manufacturing.

[0033] Among them, the longitudinal beam 21 and the cross beam 22 can be made of metal materials, such as: aluminum alloy or steel; or high-strength composite materials, etc.

[0034] As Figures 4 - 6 shown, in a specific embodiment, the battery cell 10 not only includes the pole column 11, but also includes the pole core 12, the current collector 13, the cover plate 14, and the housing 15. During fast charging, the temperature of the pole core 12 and the current collector 13 rises and is transmitted to the connection piece 30. Therefore, when the cooling liquid flows through the first flow channel 51, heat can be dissipated from the connection piece 30, and further, heat can be dissipated for the pole core 12 and the current collector 13.

[0035] Please refer to again Figure 1 、 Figure 4 and Figure 5, wherein the insulating and heat-conducting member 40 can be, but is not limited to, heat-conducting structural adhesive, heat-conducting silica gel, heat-conducting silicone grease, or other materials suitable for insulating and heat-conducting and having adhesiveness.

[0036] Wherein, the connection mode between the connecting piece 30 and the pole column 11 is welding. The connecting piece 30 is used to conduct adjacent two battery cells 10. The connecting piece 30 can be made of aluminum alloy material. The connection surface between the connecting piece 30 and the pole column 11 can be a flat surface (that is, a surface without protrusions and depressions). It can be understood that in some other embodiments, the connecting piece 30 can also be made of other conductive materials.

[0037] Wherein, the battery cell 10 can be a rechargeable secondary battery cell, a lithium iron phosphate battery cell or a ternary lithium battery cell. The battery cell part of the battery pack 1 can be composed of one or several of rechargeable secondary battery cells, lithium iron phosphate battery cells or ternary lithium battery cells. The battery pack 1 includes at least two battery cells, and the at least two battery cells are in a series and / or parallel relationship. That is, when the battery pack 1 includes only two battery cells, these two battery cells can be in a series relationship or a parallel relationship. When the battery pack 1 includes three or more battery cells, these battery cells can all be in a series relationship, all be in a parallel relationship, or some be in a series relationship and some be in a parallel relationship.

[0038] Further, in one embodiment, as Figure 6 shown, the heat dissipation member 50 is a corrugated pipe. The corrugated pipe can be extruded and formed from aluminum alloy material, or can be made of other materials.

[0039] As Figure 1 and Figure 3 shown, in one embodiment, the connecting member 23 further includes a first connecting member 231, a second connecting member 232 and a third connecting member 233. One of the first connecting member 231 and the second connecting member 232 is fixedly connected to the longitudinal beam 21, and the other is fixedly connected to the cross beam 22. The first connecting member 231 is provided with a first blind hole 2310, the second connecting member 232 is provided with a first through hole 2320 corresponding to the first blind hole 2310, and the third connecting member 233 passes through the first through hole 2320 and inserts into the first blind hole 2310 to connect the first connecting member 231 and the second connecting member 232.

[0040] Among them, the third connecting member 233 may be an element such as a bolt or a screw. The first connecting member 231, the second connecting member 232 and the third connecting member 233 may all be multiple. Specifically, one of the first connecting members 231 is fixed at each end of each cross beam 22, and the second connecting member 232 is fixedly arranged on the longitudinal beam 21. The third connecting member 233 passes through the first through hole 2320 and is inserted into the first blind hole 2310 to connect the first connecting member 231 and the second connecting member 232, thereby connecting the cross beam 22 and the longitudinal beam 21.

[0041] Further, the second connecting member 232 includes a top plate 2321, a bottom plate 2322, a through hole side plate 2323 and an adjacent plate 2324 adjacent to the through hole side plate 2323. The through hole side plate 2323 and the adjacent plate 2324 are located between the top plate 2321 and the bottom plate 2322. The first through hole 2320 is arranged on the through hole side plate 2323. A first opening 2325 is provided on one side of the second connecting member 232 opposite to the through hole side plate 2323.

[0042] Since the third connecting member 233 passes through the first through hole 2320 and is inserted into the first blind hole 2310 to connect the first connecting member 231 and the second connecting member 232, but there is still a gap between the third connecting member 233 and the first through hole 2320. Therefore, during the assembly process, it is necessary to fill the gap between the third connecting member 233 and the first through hole 2320 with gel. Therefore, the first opening 2325 is provided to facilitate filling the gap between the third connecting member 233 and the first through hole 2320 with gel.

[0043] Among them, the first blind hole 2310 may be one or multiple (two or more), and the number of the first blind holes 2310 is the same as that of the first through holes 2320.

[0044] Further, when the second connecting member 232 is fixedly connected to the longitudinal beam 21 and the first connecting member 231 is fixedly connected to the cross beam 22, the second connecting member 232 includes an end connecting member 234 and a middle connecting member 235; the end connecting member 234 includes one of the adjacent plates 2324, and a second opening 2326 communicating with the first opening 2325 is provided on one side of the end connecting member 234 opposite to the adjacent plate 2324; the middle connecting member 235 includes two adjacent plates 2324.

[0045] In this embodiment, the end connector 234 only includes one adjacent plate 2324. A second opening 2326 communicating with the first opening 2325 is provided on the side of the end connector 234 opposite to the adjacent plate 2324. The opening of the end connector 234 is larger than that of the middle connector 235, which is more convenient for the operator to seal the gap between the third connector 233 and the first blind hole 2310 with gel. It can be understood that in some other embodiments, the end connector 234 may also include two adjacent plates 2324, that is, there is only the first opening 2325.

[0046] Further, the end connector 234 further includes an intermediate plate 2327. One side of the intermediate plate 2327 is connected to the adjacent plate 2324, and the other side is connected to the through-hole side plate 2323. The presence of the intermediate plate 2327 can strengthen the strength of the end connector 234.

[0047] Please refer to Figure 1 、 Figure 6 and Figure 7 , Figure 7 which is Figure 2 a schematic cross-sectional view at the battery packs D1 - D2 in

[0048] In one embodiment, the longitudinal beam 21 includes a first longitudinal beam 211 and a second longitudinal beam 212. The first longitudinal beam 211 and the second longitudinal beam 212 extend along the thickness direction A and are respectively located on both sides of the length direction B of the at least two battery cells. A second flow channel 2110 is provided in the first longitudinal beam 211, and a third flow channel 2120 is provided in the second longitudinal beam 212; the second flow channel 2110, the first flow channel 51 and the third flow channel 2120 are internally connected in sequence.

[0049] In this embodiment, a second flow channel 2110 is provided in the first longitudinal beam 211, and a third flow channel 2120 is provided in the second longitudinal beam 212. Both ends of the heat sink 50 are respectively connected to the first longitudinal beam 211 and the second longitudinal beam 212. The second flow channel 2110 of the first longitudinal beam 211 and the third flow channel 2120 of the second longitudinal beam 212 are both connected to the first flow channel 51 of the heat sink 50 to form a flow channel path. Therefore, the coolant can dissipate heat from the battery cells 10 in the battery pack 1 when flowing through the first flow channel 51, the second flow channel 2110 and the third flow channel 2120.

[0050] Among them, the assemblable frame assembly 20 may include a plurality of cross beams 22. The assemblable frame assembly 20 formed by connecting the plurality of cross beams 22 to the first longitudinal beam 211 and the second longitudinal beam 212 has higher strength. The battery cells 10 are located inside the assemblable frame assembly 20, which can better protect the battery cells 10 and prevent the battery cells 10 from being crushed.

[0051] Further, in one embodiment, ribs 213 are provided in the second flow channel 2110 and the third flow channel 2120, and the ribs 213 extend along the length direction B.

[0052] In this embodiment, providing ribs 213 in the second flow channel 2110 and the third flow channel 2120 can enhance the strength of the first longitudinal beam 211 and the second longitudinal beam 212. When the first longitudinal beam 211 and the second longitudinal beam 212 are squeezed, it ensures that the first longitudinal beam 211, the second longitudinal beam 212, and the battery cell 10 located between the first longitudinal beam 211 and the second longitudinal beam 212 are not squeezed and damaged.

[0053] Among them, multiple ribs 213 are provided in both the second flow channel 2110 and the third flow channel 2120. The multiple ribs 213 divide the second flow channel 2110 into multiple small flow channels. The cross-section of the second flow channel 2110 can be one or a combination of several of triangle, rectangle, circle, or ellipse. Similarly, the multiple ribs 213 also divide the third flow channel 2120 into multiple small flow channels, and the cross-section of the third flow channel 2120 can also be one or a combination of several of triangle, rectangle, circle, or ellipse.

[0054] Please refer to Figure 1 and Figures 6 - 8 for Figure 8 which is a top view of a battery pack without a battery cell provided by an embodiment of the present application.

[0055] As Figure 1 , Figure 6 , Figure 7 and Figure 8 shown, further, the battery pack 1 further includes a liquid inlet 26 and a liquid outlet 27, and the liquid inlet 26 and the liquid outlet 27 are provided on the assemblable frame assembly 20.

[0056] In a specific embodiment, a liquid inlet 26 can be provided on the side surface of the first longitudinal beam 211 of the assemblable frame assembly 20 away from the battery cell 10, and a liquid outlet 27 can be provided on the side surface of the second longitudinal beam 212 of the assemblable frame assembly 20 away from the battery cell 10. The coolant enters the second flow channel 2110 from the liquid inlet 26, flows through the second flow channel 2110, the first flow channel 51, and the third flow channel 2120 in sequence, and then flows out from the liquid outlet 27. It can be understood that multiple liquid inlets 26 can also be provided on the first longitudinal beam 211, and multiple liquid outlets 27 can be provided on the second longitudinal beam 212.

[0057] Furthermore, since a plurality of the rib strips 213 are provided in both the second flow channel 2110 and the third flow channel 2120, the plurality of rib strips 213 divide the second flow channel 2110 into a plurality of small flow channels. Corresponding to each small flow channel, a corresponding liquid inlet 26 can be provided on the first longitudinal beam 211. According to actual needs, an external pipeline can be connected to one or more of the liquid inlets 26, and the coolant flows into the corresponding small flow channels from the one or more liquid inlets 26. The plurality of rib strips 213 also divide the third flow channel 2120 into a plurality of small flow channels. Similarly, corresponding to each small flow channel, a corresponding liquid outlet 27 can be provided on the second longitudinal beam 212. According to actual needs, an external pipeline can be connected to one or more of the liquid outlets 27.

[0058] In one embodiment, a fourth flow channel (not labeled) is further provided in the cross beam 22, and the liquid inlet 26 and the liquid outlet 27 can also be provided on the cross beam 22.

[0059] In one embodiment, a first interface 2111 is provided on the first longitudinal beam 211, a second interface 2121 is provided on the second longitudinal beam 212, a third interface 52 and a fourth interface 53 are provided on the heat sink 50, and the assemblable frame assembly 20 includes a first joint assembly 24 and a second joint assembly 25. The first joint assembly 24 connects the first interface 2111 and the third interface 52, and the second joint assembly 25 connects the fourth interface 53 and the second interface 2121, so that the second flow channel 2110, the first flow channel 51, and the third flow channel 2120 are internally connected in sequence.

[0060] Furthermore, the first joint assembly 24 includes a first longitudinal beam joint 241 and a first heat sink joint 242. The first longitudinal beam joint 241 is provided at the first interface 2111 of the first longitudinal beam 211, and the first heat sink joint 242 is provided at the third interface 52 of the heat sink 50. The first longitudinal beam joint 241 is connected to the first heat sink joint 242. The second joint assembly 25 includes a second longitudinal beam joint 251 and a second heat sink joint 252. The second longitudinal beam joint 251 is provided at the second interface 2121 of the second longitudinal beam 212, and the second heat sink joint 252 is provided at the fourth interface 53 of the heat sink 50. The second longitudinal beam joint 251 is connected to the second heat sink joint 252.

[0061] In one embodiment, one of the first longitudinal beam connectors 241 and the first heat sink connector 242 is a first male head, and the other is a first female head, and the first longitudinal beam connector 241 is directly docked with the first heat sink connector 242; one of the second longitudinal beam connectors 251 and the second heat sink connector 252 is a second male head, and the other is a second female head, and the second longitudinal beam connector 251 is directly docked with the second heat sink connector 252.

[0062] In this embodiment, the direct docking of the first longitudinal beam connector 241 and the first heat sink connector 242 can save pipelines, thereby saving the internal space of the battery pack 1 and improving the volume energy density and mass energy density of the battery pack 1.

[0063] Please refer to Figure 9 , Figure 9 which is a schematic cross-sectional view of the battery pack at D1-D2 in another embodiment of the present application Figure 2 ;

[0064] As Figure 9 shown, in another embodiment, similar to the first embodiment, but different from the first embodiment, the first joint assembly 24 further includes a first pipeline 243, and the first pipeline 243 connects the first longitudinal beam connector 241 and the first heat sink connector 242; the second joint assembly 25 further includes a second pipeline 253, and the second pipeline 253 connects the second longitudinal beam connector 251 and the second heat sink connector 252.

[0065] Wherein, the shapes and sizes of the first longitudinal beam connector 241 and the first heat sink connector 242 may be the same, and the two ends of the first pipeline 243 are adapted to the shapes and sizes of the first longitudinal beam connector 241 and the first heat sink connector 242; similarly, the shapes and sizes of the second longitudinal beam connector 251 and the second heat sink connector 252 may also be the same, and the two ends of the second pipeline 253 are adapted to the shapes and sizes of the second longitudinal beam connector 251 and the second heat sink connector 252.

[0066] Please refer to Figure 1 again. In one embodiment, the battery pack 1 includes at least two groups of battery cells, each group of battery cells includes at least two battery cells, and the at least two groups of battery cells are arranged along the length direction B of the battery cell 10, and a heat sink 50 is arranged between adjacent two groups of battery cells.

[0067] Please refer to Figure 10 , Figure 10 which is a structural block diagram of a vehicle in one embodiment of the present application.

[0068] As Figure 10As shown, in one embodiment, the battery pack 1 of the vehicle 100 described above.

[0069] The above is the implementation manner of the embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A battery pack, characterized in that, Comprising: At least two battery cells, the at least two battery cells being arranged along the thickness direction of the battery cells, and pole columns being respectively arranged at opposite ends of each battery cell along its length direction, wherein the length direction is perpendicular to the thickness direction; An assemblable frame assembly, the assemblable frame assembly being circumferentially arranged around the at least two battery cells, the assemblable frame assembly including longitudinal beams, cross beams and connecting members, the longitudinal beams extending along the length direction, the cross beams extending along the thickness direction, and two opposite longitudinal beams being respectively connected by the connecting members at both ends of the cross beam; A connecting piece, the connecting piece connecting the same-side pole columns of two adjacent battery cells, and the connecting piece being in a straight plate shape; An insulating and heat-conducting member, the insulating and heat-conducting member extending along the thickness direction of the battery cell, and the insulating and heat-conducting member being connected to the end face side of the battery cell having the pole column; A heat-dissipating member, the heat-dissipating member extending along the thickness direction of the battery cell, the heat-dissipating member being arranged on the end face side of the battery cell having the pole column, being arranged parallel to the plane where the connecting piece is located and being connected to the connecting piece through the insulating and heat-conducting member, and the pole column, the connecting piece and the heat-dissipating member are all located on the same side of the battery cell, a first flow channel is arranged in the heat-dissipating member, the first flow channel extending along the thickness direction of the battery cell, the insulating and heat-conducting member is used for conducting the heat generated by the battery cell to the heat-dissipating member, the first flow channel of the heat-dissipating member allows a cooling liquid to flow through to dissipate heat from the battery cell on the end face side of the battery cell having the pole column, and both ends of the heat-dissipating member are respectively connected to two opposite longitudinal beams.

2. The battery pack according to claim 1, wherein The connecting member includes a first connecting member, a second connecting member and a third connecting member, one of the first connecting member and the second connecting member is fixedly connected to the longitudinal beam, and the other is fixedly connected to the cross beam; the first connecting member is provided with a first blind hole, the second connecting member is provided with a first through hole corresponding to the first blind hole, and the third connecting member passes through the first through hole and is inserted into the first blind hole to connect the first connecting member and the second connecting member.

3. The battery pack according to claim 2, wherein, The second connecting member includes a top plate, a bottom plate, a through-hole side plate and an adjacent plate adjacent to the through-hole side plate, the through-hole side plate and the adjacent plate are located between the top plate and the bottom plate, the first through hole is arranged on the through-hole side plate, and a first opening is arranged on one side of the second connecting member opposite to the through-hole side plate.

4. The battery pack according to claim 3, wherein, When the second connecting member is fixedly connected to the longitudinal beam and the first connecting member is fixedly connected to the cross beam, the second connecting member includes an end connecting member and a middle connecting member; the end connecting member includes one adjacent plate, and a second opening communicating with the first opening is arranged on one side of the end connecting member opposite to the adjacent plate; the middle connecting member includes two adjacent plates.

5. The battery pack according to claim 1, characterized in that, The longitudinal beam includes a first longitudinal beam and a second longitudinal beam. The first longitudinal beam and the second longitudinal beam extend along the thickness direction and are respectively located on both sides of the at least two battery cells in the length direction. A second flow channel is provided in the first longitudinal beam; a third flow channel is provided in the second longitudinal beam, and the second flow channel and the first flow channel are sequentially communicated with the inside of the third flow channel respectively.

6. The battery pack according to claim 5, wherein, Ribs are provided in both the second flow channel and the third flow channel, and the ribs extend along the length direction.

7. The battery pack according to claim 1, characterized in that The battery pack further includes a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are arranged on the assemblable frame assembly.

8. The battery pack according to claim 5, characterized in that, A first interface is provided on the first longitudinal beam, a second interface is provided on the second longitudinal beam, a third interface and a fourth interface are provided on the heat dissipation member. The assemblable frame assembly includes a first joint assembly and a second joint assembly. The first joint assembly connects the first interface and the third interface, and the second joint assembly connects the second interface and the fourth interface. Both ends of the first flow channel are communicated with the inside of the two second flow channels respectively through the first joint assembly and the second joint assembly.

9. The battery pack according to claim 8, characterized in that, The first joint assembly includes a first longitudinal beam joint and a first heat dissipation member joint. The first longitudinal beam joint is arranged at the first interface of the first longitudinal beam, and the first heat dissipation member joint is arranged at the third interface of the heat dissipation member. The first longitudinal beam joint is connected to the first heat dissipation member joint; the second joint assembly includes a second longitudinal beam joint and a second heat dissipation member joint. The second longitudinal beam joint is arranged at the second interface of the second longitudinal beam, and the second heat dissipation member joint is arranged at the fourth interface of the heat dissipation member. The second longitudinal beam joint is connected to the second heat dissipation member joint.

10. The battery pack according to claim 9, characterized in that, One of the first longitudinal beam joint and the first heat dissipation member joint is a first male head, and the other is a first female head, and the first longitudinal beam joint and the first heat dissipation member joint are directly butted; one of the second longitudinal beam joint and the second heat dissipation member joint is a second male head, and the other is a second female head, and the second longitudinal beam joint and the second heat dissipation member joint are directly butted.

11. The battery pack according to claim 9, characterized in that, The first joint assembly further includes a first pipeline, and the first pipeline connects the first longitudinal beam joint and the first heat dissipation member joint; the second joint assembly further includes a second pipeline, and the second pipeline connects the second longitudinal beam joint and the second heat dissipation member joint.

12. The battery pack according to claim 1, wherein The heat dissipation member is a corrugated pipe.

13. The battery pack according to claim 1, wherein The battery pack includes at least two groups of battery cells, each group of battery cells includes at least two battery cells, the at least two groups of battery cells are arranged along the length direction of the battery cells, and the heat dissipation member is arranged between adjacent two groups of battery cells.

14. A vehicle, characterized in that, Including the battery pack according to any one of claims 1 to 13.

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