Battery, electric device, vehicle, and battery cell

Abstract

A battery (100), a battery cell (20), an electric device and a vehicle (1000), the battery (100) comprising a battery cell group (10) and a busbar (30), the battery cell group (10) comprising a plurality of battery cells (20) arranged along a first direction, the battery cell (20) comprising a plurality of electrode lead-out portions (23); in a projection plane perpendicular to the first direction, projections of at least two electrode lead-out portions (23) on the same battery cell (20) at least partially overlap. The battery (100) realizes at least partial overlap of the electrode lead-out portions (23) of the same battery cell (20) in the projection plane perpendicular to the first direction, which is conducive to making the arrangement positions of all the electrode lead-out portions (23) in the battery (100) more concentrated and compact, thereby facilitating the formation of a more regular space in the battery (100) for arranging other devices such as the busbar (30), a sampling assembly (40) and the like in the battery (100), improving the space utilization in the battery (100), and making the arrangement of the busbar (30) more concentrated, facilitating centralized protection of the connection area of the busbar (30).

Description

Battery, electric device, vehicle and battery cell TECHNICAL FIELD

[0001] The embodiments of the present disclosure relate to the technical field of batteries, in particular to a battery, an electric device, a vehicle and a battery cell. BACKGROUND

[0002] In recent years, the new energy industry has developed rapidly. Batteries are an essential part of the new energy industry.

[0003] The battery includes a busbar and a plurality of battery cells. The battery cell is provided with an electrode lead-out part. The busbar electrically connects the electrode lead-out parts of different battery cells to realize the series and parallel connection of the conductive paths of each battery cell. The electrode lead-out part on the battery cell includes two polarities of positive and negative electrodes. The busbar needs to connect the electrode lead-out parts of different polarities on different battery cells.

[0004] Due to the difference in the arrangement positions of the electrode lead-out parts of positive and negative polarities on the same battery cell, the electrode lead-out parts in the entire battery are arranged dispersedly, which is not conducive to the adaptation of other devices in the battery to the positions of the electrode lead-out parts, and increases the assembly difficulty.

[0005] SUMMARY

[0006] Therefore, the embodiments of the present disclosure aim to provide a battery, an electric device, a vehicle and a battery cell which are conducive to the concentrated arrangement of electrode lead-out parts.

[0007] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present disclosure is as follows:

[0008] The embodiments of the present disclosure provide a battery, which comprises:

[0009] A battery cell group comprising a plurality of battery cells arranged along a first direction, the battery cell comprising a plurality of electrode lead-out parts;

[0010] A busbar connected to the electrode lead-out parts of the battery cells arranged adjacent along the first direction;

[0011] In a projection plane perpendicular to the first direction, the projections of the at least two electrode lead-out parts on the same battery cell at least partially overlap.

[0012] The battery in the embodiments of the present disclosure is beneficial to make the arrangement positions of the electrode lead-out portions on the same battery cell more concentrated and compact by making the electrode lead-out portions of the same battery cell at least partially coincide in the projection plane perpendicular to the first direction, thereby being beneficial to form a more regular space in the battery to reserve a more regular space for arranging other devices such as busbars, sampling assemblies and the like in the battery, being beneficial to improve the space utilization in the battery, facilitating the arrangement of various devices in the battery to be neat, being beneficial to improve the production and assembly efficiency of the battery, in addition, the arrangement of the busbars can also be more concentrated, facilitating the concentrated protection of the connection area of the busbars.

[0013] In some embodiments, the projections of the electrode lead-out portions respectively located on two battery cells adjacent along the first direction at least partially coincide in the projection plane perpendicular to the first direction. In this way, the arrangement positions of all the electrode lead-out portions located in the same battery cell group can be made more concentrated and compact, thereby being beneficial to form a more regular space in the battery to reserve a more regular space for arranging other devices such as busbars, sampling assemblies and the like in the battery, being beneficial to improve the space utilization in the battery, facilitating the arrangement of various devices in the battery to be neat, being beneficial to improve the production and assembly efficiency of the battery.

[0014] In some embodiments, the battery cell group includes a first battery cell and a second battery cell adjacent along the first direction, and the electrode lead-out portion includes a first electrode lead-out portion located on the first battery cell and a second electrode lead-out portion located on the second battery cell; in the projection plane perpendicular to the first direction, the projections of the first electrode lead-out portion and the second electrode lead-out portion along the first direction at least partially coincide with each other; and the busbar extends along the first direction to connect the portions of the first electrode lead-out portion and the second electrode lead-out portion whose projections along the first direction coincide. In this way, by making the first electrode lead-out portion and the second electrode lead-out portion at least partially coincide in the first direction, the arrangement of the electrode lead-out portions on the adjacent battery cells can be relatively concentrated, facilitating the electrical connection; and it is also beneficial to shorten the distance between the first electrode lead-out portion and the second electrode lead-out portion which need to be electrically connected by the busbar, thereby reducing the size of the busbar, thereby being beneficial to reduce the resistance of the busbar and improve the overcurrent capacity of the busbar.

[0015] In some embodiments, the first battery cell includes a first edge and a second edge opposite along the first direction, the first edge is closer to the second battery cell than the second edge, and the maximum distance between the first electrode lead-out portion and the first edge is smaller than the maximum distance between the first electrode lead-out portion and the second edge. In this way, it is beneficial to make the first electrode lead-out portion closer to the second electrode lead-out portion along the first direction, and the arrangement of the electrode lead-out portions which need to be connected by the busbar can be more concentrated, thereby being beneficial to further shorten the size of the busbar for electrically connecting the first electrode lead-out portion and the second electrode lead-out portion, thereby being beneficial to further reduce the resistance of the busbar.

[0016] In the same or another embodiment, the second battery cell includes a third edge and a fourth edge opposite to each other along the first direction, the third edge is closer to the first battery cell than the fourth edge, the maximum distance between the second electrode lead-out part and the third edge is less than the maximum distance between the second electrode lead-out part and the fourth edge, thus, it is beneficial to make the second electrode lead-out part closer to the first electrode lead-out part along the first direction, and it is beneficial to make the electrode lead-out parts that need to be electrically connected by the busbar relatively concentrated, and it is beneficial to further shorten the size of the busbar required to electrically connect the first electrode lead-out part and the second electrode lead-out part, thereby further reducing the resistance of the busbar.

[0017] In some embodiments, the first electrode lead-out part includes a first connecting part connected to the busbar;

[0018] The first battery cell includes a first edge and a second edge opposite to each other along the first direction, the first edge is closer to the second battery cell than the second edge, and the maximum distance between the first connecting part and the first edge is less than the maximum distance between the first connecting part and the second edge. Thus, it is beneficial to make the first connecting part closer to the second electrode lead-out part along the first direction, and it is beneficial to further shorten the size of the busbar required to electrically connect the first electrode lead-out part and the second electrode lead-out part, thereby further reducing the resistance of the busbar.

[0019] In some embodiments, the maximum distance between the first connecting part and the first edge is D1, the maximum distance between the first connecting part and the second edge is D2, and D1 and D2 satisfy: D2≥2*D1, D1≥3mm. Thus, on the one hand, it is beneficial to make the first connecting part have enough distance from the first edge so that the first electrode lead-out part can be installed; on the other hand, it makes the first connecting part closer to the second electrode lead-out part in the first direction, which is beneficial to further shorten the size of the busbar required to electrically connect the first electrode lead-out part and the second electrode lead-out part, thereby further reducing the resistance of the busbar.

[0020] In some embodiments, the maximum size of the first battery cell along the first direction is D, the maximum distance between the first connecting part and the first edge is D1, and the maximum distance between the first connecting part and the second edge is D2, and D, D1 and D2 satisfy: D1≥3mm, D2≥0.5*D+3mm. Thus, on the one hand, it is beneficial to make the first connecting part have enough distance from the first edge so that the first electrode lead-out part can be installed; on the other hand, it is beneficial to arrange another electrode lead-out part on the first battery cell on the side of the first electrode lead-out part away from the second battery cell in the first direction, which has a similar size in the first direction as the first electrode lead-out part.

[0021] In some embodiments, in a projection plane perpendicular to the first direction, projections of the first electrode lead portion and the second electrode lead portion along the first direction are at least partially misaligned with each other. In this way, the part where the first electrode lead portion and the second electrode lead portion coincide along the first direction facilitates the electrical connection of the busbar, while the part where the first electrode lead portion and the second electrode lead portion do not coincide along the first direction facilitates the connection of other devices in the battery, such as the tab inside the battery cell or the sampling assembly outside the battery cell, to reduce the probability of interference with the electrical connection of the busbar and the first electrode lead portion.

[0022] In some embodiments, the busbar is connected to the first electrode lead portion and the second electrode lead portion along the second direction, and the third direction is perpendicular to the first direction and the second direction;

[0023] The size of the part of the first electrode lead portion that coincides with the projection of the second electrode lead portion along the first direction along the third direction is L1, and the size of the part of the first electrode lead portion that is misaligned with the projection of the second electrode lead portion along the first direction along the third direction is L2, L1≥L2. In this way, under the condition that the size of the first electrode lead portion along the third direction is constant, the size of the connection area of the busbar and the first electrode lead portion along the third direction can be increased, which is conducive to increasing the size of the busbar along the third direction, and further conducive to increasing the cross-sectional area of the busbar, and reducing the resistance of the busbar.

[0024] In some embodiments, L1≥2*L2. In this way, the size of the busbar along the third direction can be further increased, and the cross-sectional area of the busbar can be further increased, and the resistance of the busbar can be further reduced.

[0025] In some embodiments, the busbar is connected to the first electrode lead portion and the second electrode lead portion along the second direction, and the third direction is perpendicular to the first direction and the second direction;

[0026] The size of the first electrode lead portion along the third direction is greater than the size of the first electrode lead portion along the first direction. In this way, the size of the busbar along the third direction can be increased, thereby increasing the area of the cross section of the busbar perpendicular to the first direction, and the resistance of the busbar can be reduced to improve the current carrying capacity of the busbar and improve the heating problem of the busbar in the current-carrying state.

[0027] In some embodiments, the size of the first electrode lead portion along the third direction is greater than or equal to twice the size of the first electrode lead portion along the first direction. In this way, the size of the busbar along the third direction can be further increased, thereby increasing the area of the cross section of the busbar perpendicular to the first direction, and the resistance of the busbar can be further reduced to improve the current carrying capacity of the busbar and improve the heating problem of the busbar in the current-carrying state.

[0028] In some embodiments, the busbar is connected to the first electrode lead-out part and the second electrode lead-out part along a second direction, the second direction being perpendicular to the first direction;

[0029] A cross section of the busbar perpendicular to the first direction at a portion of the busbar that coincides with the first electrode lead-out part along a projection of the busbar along the second direction is a first cross section, a cross section of the busbar perpendicular to the first direction at a portion of the busbar between the first electrode lead-out part and the second electrode lead-out part is a second cross section, and a minimum thickness of the first cross section along the second direction is less than a minimum thickness of the second cross section along the second direction. In this way, on the one hand, by reducing the size of the portion of the busbar that coincides with the first electrode lead-out part along the projection of the busbar along the second direction, the welding difficulty of the busbar and the first electrode lead-out part is reduced, and the welding strength of the busbar and the first electrode lead-out part is improved. On the other hand, the cross-sectional area of the portion of the busbar that does not need to be welded perpendicular to the first direction is increased, and the flow capacity of the busbar is improved.

[0030] In some embodiments, the busbar includes a plurality of layers of busbar sub-pieces stacked along the second direction and connected to each other, and two adjacent layers of busbar sub-pieces along the second direction are connected at one end along a third direction, the third direction being perpendicular to the first direction and the second direction. In this way, by stacking the plurality of layers of busbar sub-pieces along the second direction, the total size of the busbar along the second direction is increased, and the cross-sectional area of the busbar perpendicular to the first direction is increased, thereby reducing the resistance of the busbar and improving the flow capacity of the busbar.

[0031] In some embodiments, one layer of the plurality of layers of busbar sub-pieces closest to the first electrode lead-out part is connected to the first electrode lead-out part, and the other layers of the plurality of layers of busbar sub-pieces are provided with through holes or through grooves penetrating along the second direction in a region of the other layers that coincides with the first electrode lead-out part along the projection of the busbar along the second direction. In this way, only one busbar sub-piece needs to be welded to the electrode lead-out part during the welding operation of the busbar and the electrode lead-out part, and the heat generated during the welding operation can quickly penetrate through the busbar, thereby improving the welding efficiency and the welding connection strength.

[0032] In some embodiments, the first battery cell further comprises a third electrode lead-out portion, in a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially overlapped in the first direction, and the first electrode lead-out portion and the third electrode lead-out portion are asymmetric about the center of the wall surface. In this way, on the one hand, it can play a certain foolproof role, facilitating the identification of the placement direction of a single battery cell being different from other battery cells, and reducing the probability of short circuit between two adjacent battery cells; on the other hand, the first electrode lead-out portion and the third electrode lead-out portion can be asymmetric on the wall surface, and do not need to be symmetric, so that the position of the electrode lead-out portion can be more flexible, for example, multiple electrode lead-out portions on the same battery cell can be arranged on one side, so as to form a larger free area on the wall surface to arrange other devices in the battery.

[0033] In some embodiments, the second battery cell further comprises a fourth electrode lead-out portion, in a projection plane perpendicular to the first direction, the second electrode lead-out portion and the fourth electrode lead-out portion are at least partially overlapped in the first direction;

[0034] The first electrode lead-out portion and the third electrode lead-out portion are located on the first wall surface of the first battery cell, and the second electrode lead-out portion and the fourth electrode lead-out portion are located on the second wall surface of the second battery cell, and the first wall surface and the second wall surface are in the same direction;

[0035] The relative positions of the second electrode lead-out portion and the fourth electrode lead-out portion on the second wall surface are the same as the relative positions of the first electrode lead-out portion and the third electrode lead-out portion on the first wall surface.

[0036] In this way, it is beneficial to simplify the design of two adjacent battery cells in the battery cell group, reduce the production cost, and at the same time, it is beneficial to reduce the size of the current collecting member connecting the electrode lead-out portions of different battery cells, and reduce the resistance of the battery cell.

[0037] In some embodiments, in a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially misaligned in the first direction. In this way, the creepage distance between the two misaligned parts of the first electrode lead-out portion and the third electrode lead-out portion in the first direction is increased, so that the electrical connection device with high demand for creepage distance in the battery, such as different sampling terminals of the sampling assembly, different polar tabs, etc., can be respectively connected with the misaligned part of the first electrode lead-out portion and the misaligned part of the third electrode lead-out portion, so as to improve the safety of the battery.

[0038] In some embodiments, the current collecting member is connected to the first electrode lead-out portion and the second electrode lead-out portion in the second direction, and the third direction is perpendicular to the first direction and the second direction;

[0039] The first electrode lead-out portion has a first end portion in the third direction, and in a projection plane perpendicular to the first direction, a projection of the first end portion along the first direction is offset from a projection of the third electrode lead-out portion along the first direction. The third electrode lead-out portion has a second end portion in the third direction, and in the projection plane perpendicular to the first direction, a projection of the second end portion along the first direction is offset from the first electrode lead-out portion along the first direction.

[0040] The first battery cell further includes a housing, a first inner connecting piece, and a second inner connecting piece. The first inner connecting piece is located in the housing and connected to the first end portion. The second inner connecting piece is located in the housing and connected to the second end portion.

[0041] In this way, the creepage distance between the first inner connecting piece and the second inner connecting piece is increased, the risk of short circuit is reduced, and the use safety of the battery is improved.

[0042] In some embodiments, the first end portion protrudes toward the third electrode lead-out portion along the first direction, and / or the second end portion protrudes toward the first electrode lead-out portion along the first direction. In this way, the size of the first end portion is increased under the condition that the sizes of the first electrode lead-out portion and the third electrode lead-out portion along the first direction are constant, the size of the connection area between the first end portion and the first inner connecting piece is increased, the overcurrent capacity is improved, and the arrangement of the first electrode lead-out portion and the third electrode lead-out portion is more compact. At the same time, the total outer surface area of the first electrode lead-out portion and the third electrode lead-out portion is increased, the heat generation of the first electrode lead-out portion and the third electrode lead-out portion during current passing is improved, and the use safety of the battery is improved.

[0043] In some embodiments, the battery cell further includes a housing and an electrode assembly. The housing has a containing space. The housing includes a first housing wall. At least part of the electrode assembly is arranged in the containing space.

[0044] The electrode lead-out portion is arranged on the first housing wall along the thickness direction of the first housing wall. The electrode lead-out portion includes the first electrode lead-out portion and the third electrode lead-out portion. At least part of the first electrode lead-out portion is arranged between the third electrode lead-out portion and the first housing wall, and the first electrode lead-out portion and the third electrode lead-out portion are in abutment.

[0045] In this way, the first electrode lead-out portion is directly limited by the first housing wall and the third electrode lead-out portion, which is beneficial to simplify the related components for fixing the first electrode lead-out portion on the battery cell and reduce the number of components.

[0046] In some embodiments, the third electrode lead-out part comprises an electrode terminal and a first insulating piece, the electrode terminal is fixed with the first insulating piece, the first electrode lead-out part is at least partially arranged between the first insulating piece and the first shell wall, and the first insulating piece abuts against the first electrode lead-out part. In this way, the probability of direct electrical conduction between the third electrode lead-out part and the first electrode lead-out part is reduced through the first insulating piece, and at the same time, the risk of short circuit caused by direct electrical conduction between the electrode terminal and the first shell wall is also reduced, thereby improving the use safety of the battery; the first insulating piece plays a positioning role on the first electrode lead-out part.

[0047] In some embodiments, the battery monomer further comprises a second insulating piece, and the second insulating piece is at least partially located between the first electrode lead-out part and the first shell wall. In this way, the risk of short circuit caused by direct electrical conduction between the first electrode lead-out part and the first shell wall is reduced, thereby improving the use safety of the battery.

[0048] In some embodiments, the first insulating piece and the second insulating piece are integrally formed. In this way, the first insulating piece and the second insulating piece are conveniently formed by one-time molding, which is beneficial to improve the production efficiency; and is beneficial to simplify the assembly process and improve the production efficiency of the battery monomer.

[0049] In some embodiments, the first electrode lead-out part comprises a first terminal plate, at least a portion of the first terminal plate is arranged on a side of the first shell wall away from the accommodation space, the electrode terminal comprises a second terminal plate, the second terminal plate is arranged on a side of the first shell wall away from the accommodation space, and the first insulating piece is fixed to the first terminal plate.

[0050] In the thickness direction of the first shell wall, the first terminal plate, the first insulating piece and the second terminal plate partially overlap, the second terminal plate is partially arranged between the first insulating piece and the first shell wall, and the first terminal plate abuts against the first insulating piece. In this way, the abutting part of the first electrode lead-out part and the third electrode lead-out part is located outside the accommodation space, thereby reducing the abutting position of the first electrode lead-out part and the third electrode lead-out part and the probability of interference between the positions at which the electrode assembly is respectively electrically connected with the first electrode lead-out part and the third electrode lead-out part.

[0051] In some embodiments, the first electrode lead-out part further comprises a first terminal disc, at least a portion of the first terminal disc is arranged on a side of the first shell wall facing the accommodation space, and the electrode terminal further comprises a second terminal disc, the second terminal disc is arranged on a side of the first shell wall facing the accommodation space.

[0052] The first terminal disc is at least partially arranged between the second terminal disc and the first shell wall along the wall thickness direction of the first shell wall, or the second terminal disc is at least partially arranged between the first terminal disc and the first shell wall along the wall thickness direction of the first shell wall. In this way, the first electrode lead-out part or the third electrode lead-out part can be further limited along the wall thickness direction of the first shell wall by the first terminal disc, the second terminal disc and the first shell wall.

[0053] In some embodiments, the third electrode lead-out part is provided with a first protruding part, the first electrode lead-out part is provided with a first recessed part, the first protruding part and the first recessed part at least partially overlap along the wall thickness direction of the first shell wall, and the first protruding part and the first recessed part cooperate with each other. In this way, the first electrode lead-out part and the third electrode lead-out part are brought into abutment along the wall thickness direction of the first shell wall by the first protruding part and the second protruding part.

[0054] In some embodiments, the first recessed part includes a first stepped part and a second stepped part, and the second stepped part is arranged on a side of the first stepped part away from the third electrode lead-out part.

[0055] The first protruding part includes a first protruding part provided by the electrode terminal, and a part of the first electrode lead-out part is located between the first protruding part and the first shell wall along the wall thickness direction of the first shell wall, and the first protruding part is at least partially accommodated in a stepped space formed by the first stepped part.

[0056] The first protruding part further includes a first covering part provided by the first insulating member, and a part of the first electrode lead-out part is located between the first covering part and the first shell wall along the wall thickness direction of the first shell wall, and the first covering part is at least partially accommodated in a stepped space formed by the second stepped part.

[0057] In this way, the first electrode lead-out part and the third electrode lead-out part are limited along the wall thickness direction of the first shell wall and perpendicular to the wall thickness direction of the first shell wall by the first stepped part and the second stepped part; and the creepage distance between the first electrode lead-out part and the third electrode lead-out part is increased by the first covering part, the probability of short circuit between the first electrode lead-out part and the third electrode lead-out part caused by foreign matter is reduced, and the use safety of the battery is improved.

[0058] In some embodiments, the height difference between the surface of the side of the first terminal plate away from the first shell wall and the surface of the side of the second terminal plate away from the first shell wall along the wall thickness direction of the first shell wall is greater than or equal to 0 and does not exceed 0.5 mm. In this way, the probability of interference between the first electrode lead-out part and the second electrode lead-out part with other devices electrically connected to each other on the other is reduced.

[0059] In some embodiments, the first terminal plate comprises a first main body portion and a first extension portion connected to each other, the second terminal plate comprises a second main body portion and a second extension portion connected to each other, the first extension portion and the second extension portion are located between the first main body portion and the second main body portion along the length direction of the first shell wall, and the first extension portion and the second extension portion are arranged in length along the width direction of the first shell wall. In this way, the first extension portion and the second extension portion facilitate electrical connection with the busbar, and the large space allowance of the first shell wall in the length direction is utilized to increase the contact area of the first extension portion and the second extension portion with the busbar, respectively. The first extension portion and the second extension portion are arranged in the width direction of the first shell wall, which facilitates more concentrated arrangement of the first extension portion and the second extension portion, and the first main body portion and the second main body portion are used to achieve electrical connection with other devices in the battery such as the sampling assembly, thereby reducing the probability of interference between the first terminal plate and the second terminal plate and other devices in electrical connection.

[0060] In some embodiments, the first electrode lead-out portion further comprises a first terminal disc, at least part of the first terminal disc is arranged on the side of the first shell wall facing the accommodation space, the electrode terminal further comprises a second terminal disc, the second terminal disc is arranged on the side of the first shell wall facing the accommodation space, and the first main body portion and the first terminal disc are directly connected through the first connecting column.

[0061] The second main body portion and the second terminal disc are directly connected through the second connecting column. In this way, the electrical connection between the first terminal plate and the first terminal disc is achieved, and the electrical connection between the second terminal plate and the second terminal disc is achieved, which facilitates the reduction of the through hole on the shell for respectively penetrating the first electrode lead-out portion and the third electrode lead-out portion.

[0062] In some embodiments, the first recess portion is arranged on the side of the first extension portion facing the electrode terminal, and the first protrusion portion is arranged on the side of the second main body portion facing the first electrode lead-out portion. In this way, the second main body portion achieves the limiting and restraining effect of the first extension portion in the thickness direction of the first shell wall, thereby reducing the probability of affecting the normal function of the first extension portion due to warping and other problems.

[0063] In some embodiments, the electrode terminal further comprises a second recess portion, a part of the first electrode lead-out portion forms at least part of a second protrusion portion, the second protrusion portion at least partially overlaps the second recess portion in the wall thickness direction of the first shell wall, and the second protrusion portion and the second recess portion cooperate with each other.

[0064] The second recess is arranged on the side of the second extension part facing the first electrode lead-out part, and the second protrusion is arranged on the side of the first main body part facing the electrode terminal. In this way, the probability of the second extension part being warped and affecting its normal function is reduced, and on the basis of limiting the second extension part, the first electrode lead-out part and the third electrode lead-out part are limited relative to each other, which is conducive to fixing the relative positions of the two.

[0065] In some embodiments, the second recess includes a third step part and a fourth step part, and the fourth step part is arranged on the side of the third step part away from the first electrode lead-out part.

[0066] The second protrusion includes a second extension part arranged on the first electrode lead-out part, and a portion of the electrode terminal is located between the second extension part and the first shell wall in the wall thickness direction of the first shell wall, and the second extension part is at least partially accommodated in the step space formed by the third step part.

[0067] The battery monomer further includes a second insulating part located at least partially between the first electrode lead-out part and the first shell wall, and the second protrusion further includes a second covering part arranged on the second insulating part, and a portion of the electrode terminal is located between the second covering part and the first shell wall in the wall thickness direction of the first shell wall, and the second covering part is at least partially accommodated in the step space formed by the fourth step part.

[0068] In this way, the third step part and the fourth step part are conducive to limiting the first electrode lead-out part and the third electrode lead-out part in the wall thickness direction of the first shell wall and perpendicular to the wall thickness direction of the first shell wall, and further conducive to improving the stability of the interlocking between the first electrode lead-out part and the third electrode lead-out part; the second covering part is conducive to increasing the creepage distance between the first electrode lead-out part and the third electrode lead-out part, reducing the probability of short circuit between the first electrode lead-out part and the third electrode lead-out part due to foreign matter, and improving the use safety of the battery.

[0069] In some embodiments, the second extension part is connected to the second terminal disc through a third connecting column, the first recess is arranged on the side of the first extension part facing the electrode terminal, and the first protrusion is arranged on the side of the second extension part facing the first electrode lead-out part. In this way, the third connecting column is fixed to the second extension part, which indirectly achieves the purpose of preventing the first extension part from being warped.

[0070] In some embodiments, the busbar is connected to the electrode lead-out portion along the second direction, the third direction is perpendicular to the first direction and the second direction, the electrode lead-out portion is located on a first wall surface of the battery monomer, the first wall surface comprises a first boundary and a second boundary opposite along the third direction, and the minimum distance between the electrode lead-out portion and the first boundary is smaller than the minimum distance between the electrode lead-out portion and the second boundary. In this way, the range of the region where the first wall surface is located near the second boundary along the third direction of the electrode lead-out portion is larger, and other devices in the battery can be arranged in this region.

[0071] In some embodiments, the busbar is connected to the electrode lead-out portion along the second direction, the third direction is perpendicular to the first direction and the second direction;

[0072] All electrode lead-out portions on the same battery monomer are located on the same wall surface, and the distance between the two farthest points of the two adjacent electrode lead-out portions on the same battery monomer along the third direction is less than or equal to one half of the maximum size of the wall surface along the third direction.

[0073] In this way, on one wall surface, each electrode lead-out portion is arranged in a concentrated manner, thereby improving the strength of the pole column arrangement region in the wall surface and even the entire wall surface through the cooperation of each electrode lead-out portion, which is conducive to reducing the risk of deformation of the wall surface and improving the use safety of the battery monomer. In addition, it is conducive to the full use of other regions of the wall surface and other wall surfaces, and it is also conducive to the centralized processing of the pole column and other devices in the attached battery during processing and maintenance.

[0074] In some embodiments, the battery further comprises a sampling assembly electrically connected to the battery monomer, and the sampling assembly is located on the same side of the battery monomer along the third direction. In this way, the sampling assembly can be directly extended along the first direction and electrically connected to each battery monomer in the battery monomer group, thereby reducing the possibility of interference between the arrangement of the sampling assembly and the electrode lead-out portion.

[0075] In some embodiments, the sampling assembly and the electrode lead-out portion are located on the first wall surface of the battery monomer. In this way, the sampling assembly and each electrode lead-out portion can be electrically connected, which is conducive to reducing the size required for the sampling assembly to be electrically connected to the electrode lead-out portion, and is conducive to making the overall size of the battery more compact.

[0076] In some embodiments, the first wall surface comprises a first boundary and a second boundary opposite along the third direction, the minimum distance between the electrode lead-out portion and the first boundary is smaller than the minimum distance between the electrode lead-out portion and the second boundary, and the sampling assembly is at least partially located between the electrode lead-out portion and the second boundary. In this way, a larger region for arranging the sampling assembly can be formed on the first wall surface, which is conducive to improving the flexibility of the arrangement of the sampling assembly and reducing the probability of interference between the arrangement of the sampling assembly and the electrode lead-out portion.

[0077] In some embodiments, the battery further comprises a sampling assembly, the busbar is connected to the first electrode lead-out part and the second electrode lead-out part along a second direction, and the third direction is perpendicular to the first direction and the second direction.

[0078] The first electrode lead-out part comprises a first connecting part and a second connecting part in different positions, the first connecting part is connected to the busbar, and the second connecting part is connected to the sampling assembly, and the minimum dimension of the first connecting part along the third direction is greater than the minimum dimension of the second connecting part along the third direction. In this way, under the condition that the size of the electrode lead-out part along the third direction is constant, the first connecting part has a larger size along the third direction than the second connecting part, which is beneficial to the busbar having a larger size along the third direction, thereby reducing the resistance of the busbar and improving the current carrying capacity of the busbar. At the same time, the second connecting part is provided on the electrode lead-out part for connecting the sampling assembly, which reduces the probability of interference between the busbar and the sampling assembly.

[0079] In some embodiments, the second connecting part is located at one end of the first electrode lead-out part along the third direction close to the sampling assembly for connecting the sampling assembly, and the first connecting part is located at the other end of the first electrode lead-out part. In this way, the second connecting part is closer to the sampling assembly in the third direction, thereby facilitating the reduction of the size required for the connection between the sampling assembly and the second connecting part, and further reducing the probability of interference between the sampling assembly and other devices, which causes problems in the collected information.

[0080] In some embodiments, the busbars adjacent to each other along the first direction on the same battery monomer group are projected to coincide along the first direction. In this way, the arrangement of the busbars in the battery can be more concentrated, which is convenient for concentrated protection of the electrical connection area. In some embodiments in which the sampling assembly is connected to the busbar, the busbars on the same battery monomer group can also be arranged along the first direction, which is beneficial to making the parts of the sampling assembly for connecting the busbars extend to the same size of the busbars along the third direction, thereby reducing the design and manufacturing cost of the sampling assembly.

[0081] In some embodiments, the battery comprises a box body, the box body comprises a containing cavity and a first box wall, the first box wall is used for closing the containing cavity, and the first box wall is at least partially protruded from the inner surface to the outer surface to form a recess on the inner surface,

[0082] The recess contains at least part of the electrode lead-out part, so that the shape of the space in the containing cavity is better adapted to the shape of the part of the electrode lead-out part on the battery monomer, which is beneficial to improving the space utilization in the box body. In the same embodiment or other embodiments, the recess contains at least part of the busbar, which reduces the occupation of the space in the containing cavity for arranging the battery monomer by the busbar, and is beneficial to improving the space utilization.

[0083] The battery provided by the embodiments of the present disclosure is used to provide electric energy for the electric device. In this way, the more compact and concentrated arrangement of the electrode lead-out portions facilitates the more compact size of the battery, and further facilitates the more compact size of the electric device.

[0084] The embodiments of the present disclosure also provide a vehicle, which comprises a vehicle frame and the battery as in any one of the preceding embodiments. The battery is arranged on the vehicle frame. The outer surface of the first box wall forms a protrusion corresponding to the area of the recess in the wall thickness direction. The protrusion faces the vehicle frame. In this way, the protrusion in the vehicle frame facilitates the improvement of the space utilization rate in the vehicle, and facilitates the improvement of the battery capacity that can be carried by the vehicle.

[0085] In some embodiments, the vehicle frame has a support beam. The support beam has a slot. The protrusion at least partially extends into the slot. In this way, the protrusion can utilize the internal space of the support beam to improve the utilization rate of the space in the vehicle. The support beam can also transmit the load to the battery to improve the structural rigidity of the vehicle.

[0086] The embodiments of the present disclosure also provide a battery monomer. The battery monomer is used in a battery. The battery monomer is arranged in a plurality in the battery and arranged along a first direction. The battery also comprises a current collector. The battery monomer comprises a plurality of electrode lead-out portions. The battery monomer is configured to connect the current collector to the electrode lead-out portions of the battery monomers arranged adjacent along the first direction. In a projection plane perpendicular to the first direction, the projections of at least two electrode lead-out portions on the battery monomer at least partially overlap.

[0087] The structure of the battery monomer in the embodiments facilitates the more concentrated and compact arrangement of the electrode lead-out portions on the same battery monomer. Therefore, when the battery monomer is applied in the battery, a more regular space can be formed to reserve a more regular space for arranging other devices such as the current collector and the sampling assembly in the battery. This facilitates the improvement of the space utilization rate in the battery, the neat arrangement of various devices in the battery, and the improvement of the production and assembly efficiency of the battery. In addition, the arrangement of the current collector in the battery can also be more concentrated, which facilitates the concentrated protection of the connection area of the current collector.

[0088] In some embodiments, the battery monomer comprises a first electrode lead-out portion. The first electrode lead-out portion comprises a first connection portion for connecting with the current collector. The battery monomer also comprises a first edge and a second edge opposite along the first direction. The maximum distance between the first connection portion and the first edge is smaller than the maximum distance between the first connection portion and the second edge. In this way, when this kind of battery monomer is applied in the battery, the first connection portion is closer to the electrode lead-out portion of another battery monomer in the battery along the first direction. This facilitates the further shortening of the size of the current collector required to realize the electrical connection between the first electrode lead-out portion and the second electrode lead-out portion, and thus facilitates the further reduction of the resistance of the current collector.

[0089] In some embodiments, the battery cell further comprises a third electrode lead-out portion, in a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially overlapped in projection along the first direction, and the first electrode lead-out portion and the third electrode lead-out portion are asymmetrically arranged with respect to the center of the wall surface. In this way, the first electrode lead-out portion and the third electrode lead-out portion can be asymmetrically arranged on the wall surface, and do not need to be symmetrically arranged. The position of the electrode lead-out portion can be more flexible, for example, multiple electrode lead-out portions on the same battery cell can be arranged on one side, so as to form a larger area of free space on the wall surface to arrange other devices in the battery.

[0090] In some embodiments, in a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially misaligned in projection along the first direction. In this way, the creeping distance between the two misaligned portions of the first electrode lead-out portion and the third electrode lead-out portion in projection along the first direction is increased. When such a battery cell is used in a battery, it is beneficial to electrically connect different sampling terminals of a sampling assembly, different polar tabs, and other electrically connecting devices in the battery that require a larger creeping distance, to the misaligned portions of the first electrode lead-out portion and the third electrode lead-out portion, respectively, so as to improve the safety of the battery in use.

[0091] In some embodiments, the current collector is used to connect to the first electrode lead-out portion along the second direction, and the third direction is perpendicular to the first direction and the second direction. The first electrode lead-out portion has a first end portion in the third direction, and in a projection plane perpendicular to the first direction, the projection of the first end portion along the first direction is misaligned with the projection of the third electrode lead-out portion along the first direction. The third electrode lead-out portion has a second end portion in the third direction, and in a projection plane perpendicular to the first direction, the projection of the second end portion along the first direction is misaligned with the projection of the first electrode lead-out portion along the first direction. The battery cell further comprises a housing, a first internal connecting member and a second internal connecting member. The first internal connecting member is located in the housing and connected to the first end portion, and the second internal connecting member is located in the housing and connected to the second end portion. In this way, it is beneficial to increase the creeping distance between the first internal connecting member and the second internal connecting member in the battery cell, reduce the risk of short circuiting between the two, and improve the safety of the battery in use.

[0092] In some embodiments, the first end portion protrudes towards the third electrode lead-out portion in the first direction, and in the same or different embodiments, the second end portion protrudes towards the first electrode lead-out portion in the first direction. In this way, the size of the first end portion can be increased under the condition that the sizes of the first electrode lead-out portion and the third electrode lead-out portion in the first direction are certain, the size of the connecting area between the first end portion and the first inner connecting piece can be increased, the overcurrent capacity can be improved, and the arrangement of the first electrode lead-out portion and the third electrode lead-out portion can be more compact. At the same time, the total outer surface area of the first electrode lead-out portion and the third electrode lead-out portion can be increased, the heat generation of the first electrode lead-out portion and the third electrode lead-out portion during current passing can be improved, and the use safety of the battery can be improved.

[0093] In some embodiments, the battery monomer further comprises a shell and an electrode assembly, the shell has a containing space, the shell comprises a first shell wall, at least part of the electrode assembly is arranged in the containing space; the electrode lead-out portion is arranged on the first shell wall, the electrode lead-out portion comprises a first electrode lead-out portion and a third electrode lead-out portion, at least part of the first electrode lead-out portion is arranged between the third electrode lead-out portion and the first shell wall, and the first electrode lead-out portion abuts against the third electrode lead-out portion. In this way, the limiting effect of the first electrode lead-out portion can be directly realized by the first shell wall and the third electrode lead-out portion, which is beneficial to simplify the related parts for fixing the first electrode lead-out portion on the battery monomer and reduce the number of parts.

[0094] In some embodiments, the third electrode lead-out portion comprises an electrode terminal and a first insulating piece, the electrode terminal is fixed with the first insulating piece, the first electrode lead-out portion is at least partially arranged between the first insulating piece and the first shell wall, and the first insulating piece abuts against the first electrode lead-out portion. In this way, the probability of direct electrical conduction between the third electrode lead-out portion and the first electrode lead-out portion is reduced by the first insulating piece, and at the same time, the risk of short circuit caused by direct electrical conduction between the electrode terminal and the first shell wall is also reduced, thereby improving the use safety of the battery; the first insulating piece plays a positioning role on the first electrode lead-out portion.

[0095] In some embodiments, the battery monomer further comprises a second insulating piece, the second insulating piece is at least partially located between the first electrode lead-out portion and the first shell wall. In this way, the risk of short circuit caused by direct electrical conduction between the first electrode lead-out portion and the first shell wall is reduced, thereby improving the use safety of the battery.

[0096] In some embodiments, the first insulating piece and the second insulating piece are integrally formed. In this way, the first insulating piece and the second insulating piece can be formed by one-time molding, which is beneficial to improve the production efficiency; the assembly process can be simplified, and the production efficiency of the battery monomer can be improved.

[0097] In some embodiments, the first electrode lead-out portion includes a first terminal plate, at least a portion of the first terminal plate is disposed on a side of the first housing wall away from the accommodation space, the electrode terminal includes a second terminal plate, the second terminal plate is disposed on a side of the first housing wall away from the accommodation space, and the first insulating piece is fixed to the first terminal plate;

[0098] In some embodiments, along the wall thickness direction of the first housing wall, the first terminal plate, the first insulating piece, and the second terminal plate partially overlap, the second terminal plate is partially disposed between the first insulating piece and the first housing wall, and the first terminal plate abuts against the first insulating piece. In this way, the abutting part of the first electrode lead-out portion and the third electrode lead-out portion is located outside the accommodation space, reducing the abutting position of the first electrode lead-out portion and the third electrode lead-out portion, and the probability of interference between the position where the electrode assembly is electrically connected to the first electrode lead-out portion and the third electrode lead-out portion, respectively.

[0099] In some embodiments, the first electrode lead-out portion further includes a first terminal disc, at least a portion of the first terminal disc is disposed on a side of the first housing wall facing the accommodation space, and the electrode terminal further includes a second terminal disc, the second terminal disc is disposed on a side of the first housing wall facing the accommodation space;

[0100] In some embodiments, along the wall thickness direction of the first housing wall, the first terminal disc is at least partially disposed between the second terminal disc and the first housing wall; or, along the wall thickness direction of the first housing wall, the second terminal disc is at least partially disposed between the first terminal disc and the first housing wall. In this way, through the first terminal disc, the second terminal disc, and the first housing wall, the first electrode lead-out portion or the third electrode lead-out portion can be further limited in the wall thickness direction of the first housing wall.

[0101] In some embodiments, the third electrode lead-out portion is provided with a first protruding portion, the first electrode lead-out portion is provided with a first recessed portion, the first protruding portion and the first recessed portion at least partially overlap in the wall thickness direction of the first housing wall, and the first protruding portion and the first recessed portion cooperate with each other. In this way, through the first protruding portion and the second protruding portion in the wall thickness direction of the first housing wall, the purpose of abutting the first electrode lead-out portion and the third electrode lead-out portion is achieved.

[0102] In some embodiments, the first recessed portion includes a first stepped portion and a second stepped portion, the second stepped portion is disposed on a side of the first stepped portion away from the third electrode lead-out portion;

[0103] The first protruding portion includes a first protruding portion provided by the electrode terminal, along the wall thickness direction of the first housing wall, a portion of the first electrode lead-out portion is located between the first protruding portion and the first housing wall, and the first protruding portion is at least partially accommodated in a stepped space formed by the first stepped portion;

[0104] The first protruding portion further comprises a first covering portion provided by the first insulating member, and a part of the first electrode lead-out portion is located between the first covering portion and the first shell wall in the wall thickness direction of the first shell wall, and the first covering portion is at least partially accommodated in the step space formed by the second stepped portion.

[0105] In this way, the first stepped portion and the second stepped portion facilitate limiting the first electrode lead-out portion and the third electrode lead-out portion in the wall thickness direction of the first shell wall and perpendicular to the wall thickness direction of the first shell wall; the first covering portion increases the creepage distance between the first electrode lead-out portion and the third electrode lead-out portion, reduces the probability of short circuit between the first electrode lead-out portion and the third electrode lead-out portion due to foreign matter, and improves the use safety of the battery.

[0106] In some embodiments, the height difference between the surface of the side of the first terminal plate away from the shell wall and the surface of the side of the second terminal plate away from the first shell wall is greater than or equal to 0 and does not exceed 0.5 mm in the wall thickness direction of the first shell wall. In this way, the probability of interference between the first electrode lead-out portion and the second electrode lead-out portion and other devices electrically connected to each other on the other is reduced.

[0107] In some embodiments, the first terminal plate comprises a first main portion and a first extension portion connected to each other, and the second terminal plate comprises a second main portion and a second extension portion connected to each other, the first extension portion and the second extension portion are located between the first main portion and the second main portion in the length direction of the first shell wall, and the first extension portion and the second extension portion are arranged in length in the width direction of the first shell wall. In this way, the first extension portion and the second extension portion facilitate electrical connection with the bus member, and the large space of the first shell wall in the length direction is utilized to increase the contact area of the first extension portion and the second extension portion with the bus member; the first extension portion and the second extension portion are arranged in the width direction of the first shell wall, which facilitates the concentration of the arrangement of the first extension portion and the second extension portion, and the electrical connection of the first main portion and the second main portion with other devices such as the sampling assembly in the battery, thereby reducing the probability of interference between the first terminal plate and the second terminal plate and other devices.

[0108] In some embodiments, the electrode terminal further comprises a first terminal plate, at least part of the first terminal plate is arranged on the side of the first housing wall facing the accommodation space, the second electrode terminal further comprises a second terminal plate, the second terminal plate is arranged on the side of the first housing wall facing the accommodation space, the first main body part and the first terminal plate are directly connected through the first connecting column; the second main body part and the second terminal plate are directly connected through the second connecting column; in the second terminal plate, the second connecting column is arranged on the second main body part. In this way, the electrical connection between the first terminal plate and the first terminal plate is realized, the electrical connection between the second terminal plate and the second terminal plate is realized, and the through holes on the housing for respectively penetrating the first electrode lead-out part and the third electrode lead-out part are reduced.

[0109] In some embodiments, the first recess is arranged on the side of the first extension part facing the electrode terminal, and the first protrusion is arranged on the side of the second main body part facing the first electrode lead-out part. In this way, the first extension part is limited and constrained in the thickness direction of the first housing wall through the second main body part, reducing the probability of affecting the normal function of the first extension part due to problems such as warping.

[0110] In some embodiments, the electrode terminal further comprises a second recess, a part of the first electrode lead-out part forms at least part of the second protrusion, the second protrusion at least partially overlaps the second recess in the wall thickness direction of the first housing wall, and the second protrusion and the second recess cooperate with each other;

[0111] The second recess is arranged on the side of the second extension part facing the first electrode lead-out part, and the second protrusion is arranged on the side of the first main body part facing the electrode terminal. In this way, the probability of affecting the normal function of the second extension part due to problems such as warping is reduced, and on the basis of limiting the second extension part, the first electrode lead-out part and the third electrode lead-out part are further limited to each other, which is more conducive to fixing the relative positions of the two.

[0112] In some embodiments, the second recess comprises a third step part and a fourth step part, and the fourth step part is arranged on the side of the third step part away from the first electrode lead-out part;

[0113] The second protrusion comprises a second extension part arranged on the first electrode lead-out part, and a part of the electrode terminal is located between the second extension part and the first housing wall in the wall thickness direction of the first housing wall, and the second extension part is at least partially accommodated in the step space formed by the third step part;

[0114] The battery monomer further comprises a second insulating member located at least partially between the first electrode lead-out portion and the first shell wall, and the second protruding portion further comprises a second covering portion provided by the second insulating member, and a part of the electrode terminal is located between the second covering portion and the first shell wall along the wall thickness direction of the first shell wall, and the second covering portion is at least partially accommodated in the step space formed by the fourth step portion.

[0115] The third step portion and the fourth step portion facilitate the limiting action between the first electrode lead-out portion and the third electrode lead-out portion along the wall thickness direction of the first shell wall and perpendicular to the wall thickness direction of the first shell wall, further facilitating the stability of the interlocking between the first electrode lead-out portion and the third electrode lead-out portion, facilitating the increase of the creepage distance between the first electrode lead-out portion and the third electrode lead-out portion through the second covering portion, reducing the probability of short circuit between the first electrode lead-out portion and the third electrode lead-out portion caused by foreign matter, and improving the use safety of the battery.

[0116] In some embodiments, the second extending portion is connected to the second terminal disc through the third connecting column, the first recessed portion is arranged on the side of the first extending portion facing the electrode terminal, and the first protruding portion is arranged on the side of the second extending portion facing the first electrode lead-out portion. In this way, the third connecting column indirectly achieves the purpose of preventing the first extending portion from being warped by fixing the second extending portion.

[0117] In some embodiments, the current collecting member is connected to the electrode lead-out portion along the second direction, and the third direction is perpendicular to the first direction and the second direction; the electrode lead-out portion is located on the first wall surface of the battery monomer, the first wall surface comprises a first boundary and a second boundary opposite along the third direction, and the minimum distance between the electrode lead-out portion and the first boundary is less than the minimum distance between the electrode lead-out portion and the second boundary. In this way, when such a battery monomer is applied to a battery, it is beneficial to make the range of the region of the first wall surface where the electrode lead-out portion is close to the second boundary along the third direction larger, so as to facilitate the arrangement of other devices in the battery in this region.

[0118] In some embodiments, the current collecting member is connected to the electrode lead-out portion along the second direction, and the third direction is perpendicular to the first direction and the second direction; all the electrode lead-out portions on the same battery monomer are located on the same wall surface, and the distance between the two farthest points of the two adjacent electrode lead-out portions on the same battery monomer along the third direction is less than or equal to one half of the maximum dimension of the wall surface along the third direction. In this way, on one wall surface, each electrode lead-out portion is arranged concentratedly, thereby improving the strength of the pole post arrangement region in the wall surface and even the whole wall surface through the cooperation of each electrode lead-out portion, which is beneficial to reduce the risk of deformation of the wall surface and improve the use safety of the battery monomer. In addition, it is beneficial to fully utilize other regions of the wall surface and other wall surfaces, and it is also beneficial to the centralized processing of the pole posts and other devices attached in the battery during processing and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0119] Fig. 1 is a schematic view of a vehicle as an example of an electric device in an embodiment of the present disclosure;

[0120] Fig. 2 is a schematic view of a battery in an embodiment of the present disclosure;

[0121] Fig. 3 is a schematic view of a battery cell group and bus bars in a first embodiment of the present disclosure;

[0122] Fig. 4 is a schematic view of a battery cell group and bus bars in a second embodiment of the present disclosure;

[0123] Fig. 5 is a schematic view of a battery cell group and bus bars in a third embodiment of the present disclosure;

[0124] Fig. 6 is a partial enlarged view of position A1 in Fig. 3;

[0125] Fig. 7 is a partial enlarged view of position A2 in Fig. 4;

[0126] Fig. 8 is a partial enlarged view of position A3 in Fig. 5;

[0127] Fig. 9 is a partial enlarged view of position A3 in Fig. 5 after removal of one bus bar, and indicates D, D1, D2;

[0128] Fig. 10 is a partial enlarged view of position A3 in Fig. 5 after removal of one bus bar, and indicates D', D3, D4;

[0129] Fig. 11 is an axonometric view of a battery cell group;

[0130] Fig. 12 is a partial enlarged view of position A3 in Fig. 5 after removal of one bus bar, and indicates L1, L2, L4;

[0131] Fig. 13 is a partial enlarged view of position A3 in Fig. 5 after removal of one bus bar, and indicates L3, L4;

[0132] Fig. 14 is a partial enlarged view of position A3 in Fig. 5, and indicates the positions of the cross sections B-B and C-C;

[0133] Fig. 15 is a cross-sectional view of the embodiment of the bus bar in Fig. 14 at position B-B;

[0134] Fig. 16 is a cross-sectional view of the embodiment in Fig. 15 at position C-C;

[0135] Fig. 17 is a cross-sectional view of another embodiment of the bus bar in Fig. 14 at position B-B;

[0136] Fig. 18 is a cross-sectional view of the embodiment in Fig. 17 at position C-C;

[0137] Figure 19 is an isometric view of a busbar in one embodiment of the present disclosure;

[0138] Figure 20 is a schematic view of a battery cell group, and a busbar and sampling assembly in a fourth embodiment of the present disclosure;

[0139] Figure 21 is a schematic view of a battery cell group and busbar in a fifth embodiment of the present disclosure;

[0140] Figure 22 is a schematic view of a battery cell group and busbar in a sixth embodiment of the present disclosure;

[0141] Figure 23 is a partial enlarged view of position A2 in Figure 4, with a first end 2312 and a second end 2331 indicated;

[0142] Figure 24 is a partial enlarged view of position A3 in Figure 5, with a first end 2312 and a second end 2331 indicated;

[0143] Figure 25 is a cutaway view of a battery cell in the embodiment of Figure 21;

[0144] Figure 26 is a partial enlarged view of position D in Figure 25;

[0145] Figure 27 is a schematic view of a first housing wall, a first electrode lead-out portion, and a third electrode lead-out portion in one embodiment of the present disclosure;

[0146] Figure 28 is a cutaway view of position E-E in Figure 27;

[0147] Figure 29 is a partial enlarged view of position G in Figure 28;

[0148] Figure 30 is a cutaway view of position F-F in Figure 27;

[0149] Figure 31 is a partial enlarged view of position H in Figure 28;

[0150] Figure 32 is a schematic view of a first housing wall, a first electrode lead-out portion, and a third electrode lead-out portion in another embodiment of the present disclosure;

[0151] Figure 33 is a schematic view of a battery cell in one embodiment of the present disclosure;

[0152] Figure 34 is a schematic view of a battery cell group, a busbar, and a sampling assembly in one embodiment of the present disclosure;

[0153] Figure 35 is a partial enlarged view of position I in Figure 34;

[0154] Figure 36 is a schematic view of a battery in one embodiment of the present disclosure;

[0155] Fig. 37 is a schematic view of the embodiment in Fig. 36 from another perspective, with part of the box cut away;

[0156] Fig. 38 is a schematic view of a partial enlargement of position J in Fig. 37;

[0157] Fig. 39 is a schematic view of a partial cutaway of a battery in an embodiment of the present disclosure;

[0158] Fig. 40 is a schematic view of the arrangement of a frame and a battery in an embodiment of the present disclosure;

[0159] Fig. 41 is a schematic view of a partial enlargement of position M in Fig. 40. DETAILED DESCRIPTION

[0160] It should be noted that the embodiments and technical features in the present disclosure and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation and illustration of the purpose of the present disclosure, and should not be regarded as an improper limitation on the present disclosure.

[0161] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs; the terminology used in the specification herein is for describing specific embodiments only and is not intended to be limiting of the present disclosure; the terms "comprising," "having," and any variations thereof in the present specification and in the claims are intended to cover a non-exclusive inclusion.

[0162] In the description of the embodiments of the present disclosure, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0163] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0164] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0165] In the description of the embodiments of the present disclosure, as shown in FIGS. 3-14, 20-25, 28, 34, 35 and 38, the direction in which the arrow F1 is located is the "first direction"; as shown in FIGS. 11, 15-19, 25, 28, 37, 40, the direction in which the arrow F2 is located is the "second direction"; as shown in FIGS. 3-13, 19, 23, 24, 27, 33, 34 and 37, the direction in which the arrow F3 is located is the "third direction".

[0166] In the description of the embodiments of the present disclosure, unless explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0167] In the description of the embodiments of the present disclosure, unless explicitly specified and limited, the technical term "contacting" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, which can be contact between two contacting objects without interaction force, or contact between two contacting objects with interaction force.

[0168] At present, batteries are increasingly widely used in life and industry. Batteries are not only used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and in many fields such as aerospace. With the continuous expansion of the application field of batteries, the market demand is also increasing.

[0169] FIG. 2 is a perspective exploded view of the battery 100 provided by the embodiments of the present disclosure. As shown in FIG. 2, the battery 100 includes a box body 50 and at least one battery cell 10.

[0170] The box body 50 includes a top cover 53 and a bottom cover 54, and the top cover 53 covers the bottom cover 54, so as to form an installation space for placing the battery cell 10 between the bottom cover 54 and the top cover 53.

[0171] In the battery 100, the battery cells 10 can be multiple, and the multiple battery cells 10 can be connected in series or in parallel or in a mixed manner. The mixed manner refers to that the multiple battery cells 10 are connected in series and in parallel at the same time. The multiple battery cells 10 can be directly connected in series or in parallel or in a mixed manner, and then the whole of the multiple battery cells 10 is placed in the accommodating space formed by the bottom cover 54 and the top cover 53. Of course, the battery 100 can also be that the multiple battery cells 10 are first connected in series or in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the accommodating space formed by the bottom cover 54 and the top cover 53. The battery 100 can also include other structures, for example, the battery 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 10.

[0172] The battery cell 10 involved in the embodiments of the present disclosure can include an electrode assembly and an electrolyte. The electrode assembly can be composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell 10 can work by moving metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet can include a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated to serve as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode sheet can include a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the negative electrode active material layer protrudes from the current collector with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated to serve as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure. In addition, the battery cell 10 involved in the embodiments of the present disclosure can also be a solid-state battery cell.

[0173] The battery cell 10 can be a secondary battery, which refers to a battery cell 10 that can be activated by charging after discharging to continue to be used.

[0174] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present disclosure are not limited thereto.

[0175] The battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, and the like, and the embodiments of the present disclosure are not particularly limited.

[0176] The battery 100 involved in the embodiments of the present disclosure refers to a single physical module including one or more battery cells 10 to provide higher voltage and capacity.

[0177] The power consuming device involved in the embodiments of the present disclosure is powered by the battery described above, and the power consuming device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0178] In the following embodiments, for the convenience of description, the power consuming device of an embodiment of the present disclosure is taken as a vehicle 1000 for example. The following is described in conjunction with the drawings.

[0179] FIG. 1 is a structural schematic diagram of a vehicle 1000 provided by an embodiment of the present disclosure. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, and the like. As shown in FIG. 1, the vehicle 1000 is internally provided with a battery 100, and the battery 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0180] In some embodiments of the present disclosure, the battery 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0181] The embodiments of the present disclosure are described in detail as follows.

[0182] In a battery, the electrode lead-out portions of the battery cells are usually arranged to protrude from the shell of the battery cell and have a certain height, which makes it necessary to plan a part of the space in the battery to accommodate the electrode lead-out portions. In order to facilitate production, the electrode lead-out portions of different polarities on the same battery cell are usually symmetrically arranged at the two ends of the battery cell along the length direction of the battery cell, which makes it difficult to arrange other components in the battery by using the remaining space on the wall of the battery cell where the electrode lead-out portions are arranged. For example, when the sampling assembly 40 is arranged between the electrode lead-out portions of different polarities, the interference and insulation problems with the electrode lead-out portions on both sides need to be considered, which greatly wastes the space.

[0183] Moreover, the electrode lead-out portions of different polarities are arranged to be relatively dispersed, which is not conducive to the compact arrangement of the busbar and other components in the battery, and is not conducive to improving the space utilization.

[0184] Based on the above problems, the embodiments of the present disclosure provide a battery, which comprises a battery cell group and a busbar. The battery cell group comprises a plurality of electrode lead-out portions. The busbar is connected to the electrode lead-out portions of the battery cells arranged adjacent to each other along a first direction. In a projection plane perpendicular to the first direction, the projections of at least two electrode lead-out portions located on the same battery cell at least partially overlap. In this way, the arrangement positions of the electrode lead-out portions on the same battery cell are more concentrated and compact, which is conducive to more compact arrangement of other components in the battery and the battery cell, thereby improving the space utilization in the battery.

[0185] Specifically, referring to FIGS. 3-5, the embodiments of the present disclosure provide a battery 100, which comprises:

[0186] a battery cell group 10 comprising a plurality of battery cells 20 arranged along a first direction F1, the battery cells 20 comprising a plurality of electrode lead-out portions 23; and a busbar 30 connected to the electrode lead-out portions 23 of the battery cells 20 arranged adjacent to each other along the first direction F1. In a projection plane perpendicular to the first direction F1, the projections of at least two electrode lead-out portions 23 located on the same battery cell 20 at least partially overlap.

[0187] The battery cell group 10 refers to a combination formed by a plurality of battery cells 20 arranged along the first direction F1.

[0188] The electrode lead-out portion 23 can be provided through the shell 24 of the battery cell 20, as shown in FIGS. 26 and 27. A part of the electrode lead-out portion 23 can be located inside the shell 24 to be electrically connected to the electrode assembly 27 inside the shell 24. Another part of the electrode lead-out portion 23 can be located outside the shell 24 to be electrically connected to other components in the battery 100, such as the busbar 30 and the sampling assembly 40.

[0189] The current collector 30 is conductive, and the different electrode lead-out portions 23 on different battery monomers 20 realize series and parallel electrical connection between different battery monomers 20.

[0190] It can be understood that the polarity of the electrode lead-out portion 23 can be negative or positive.

[0191] In the projection plane perpendicular to the first direction F1, the projections of the at least two electrode lead-out portions 23 on the same battery monomer 20 at least partially overlap, that is, on one battery monomer 20, at least two electrode lead-out portions 23 are oppositely arranged along the first direction F1.

[0192] The battery 100 in the embodiment of the present disclosure is beneficial to make the arrangement positions of the electrode lead-out portions 23 on the battery monomer 20 more concentrated and compact, so that when the battery monomer 20 is arranged into a group and applied to the battery 100, a relatively regular space can be formed in the battery 100 to arrange other devices such as the current collector 30 and the sampling assembly 40 in the battery 100, which is beneficial to improve the space utilization in the battery 100, facilitate the arrangement of various devices in the battery 100, and improve the production and assembly efficiency of the battery 100.

[0193] In some embodiments in which the battery monomer 20 is a square cell, the first direction F1 can be the width direction of the battery monomer 20, the second direction can be the height direction F2 of the battery monomer 20, and the third direction F3 can be the length direction of the battery monomer 20.

[0194] In some embodiments, in the projection plane perpendicular to the first direction F1, the projections of the electrode lead-out portions 23 respectively located on two battery monomers 20 adjacent along the first direction F1 at least partially overlap, that is, in the two adjacent battery monomers 20, one electrode lead-out portion 23 on one battery monomer 20 and one electrode lead-out portion 23 on the other battery monomer 20 are oppositely arranged along the first direction F1. This can make the arrangement positions of all the electrode lead-out portions 23 in the same battery monomer group 10 more concentrated and compact, so as to form a relatively regular space in the battery 100 to reserve a more regular space for arranging other devices such as the current collector and the sampling assembly in the battery 100, which is beneficial to improve the space utilization in the battery 100, facilitate the arrangement of various devices in the battery 100, and improve the production and assembly efficiency of the battery 100.

[0195] In some embodiments, referring to FIGS. 3-5, the battery cell group 10 includes a first battery cell 21 and a second battery cell 22 adjacent to each other along a first direction F1, the electrode lead-out portion 23 includes a first electrode lead-out portion 231 located on the first battery cell 21 and a second electrode lead-out portion 232 located on the second battery cell 22; in a projection plane perpendicular to the first direction F1, projections of the first electrode lead-out portion 231 and the second electrode lead-out portion 232 along the first direction F1 at least partially coincide with each other, and the current collector 30 extends along the first direction F1 to connect the first electrode lead-out portion 231 and the second electrode lead-out portion 232 at the part where the projections coincide with each other along the first direction F1.

[0196] The first battery cell 21 and the second battery cell 22 refer to two battery cells 20 adjacent to each other along the first direction F1 in the battery cell group 10.

[0197] The first electrode lead-out portion 231 and the second electrode lead-out portion 232 refer to one electrode lead-out portion 23 located on the first battery cell 21 and one electrode lead-out portion 23 located on the second battery cell 22, respectively. When the first battery cell 21 and the second battery cell 22 are connected in series, the first electrode lead-out portion 231 and the second electrode lead-out portion 232 can have different polarities; when the first battery cell 21 and the second battery cell 22 are connected in parallel, the first electrode lead-out portion 231 and the second electrode lead-out portion 232 can have the same polarity.

[0198] The first battery cell 21 and the second battery cell 22 are electrically connected by the current collector 30 forming a conductive path between the first electrode lead-out portion 231 and the second electrode lead-out portion 232.

[0199] In the projection plane perpendicular to the first direction F1, the projection of the first electrode lead-out portion 231 and the projection of the second electrode lead-out portion 232 at least partially coincide, that is, the first electrode lead-out portion 231 and the second electrode lead-out portion 232 are at least partially arranged opposite to each other along the first direction F1, and the current collector 30 can connect the first electrode lead-out portion 231 and the second electrode lead-out portion 232 along the first direction F1, so that the extension direction of the current collector 30 can be the same as the arrangement direction of each battery cell 20 in the battery cell group 10.

[0200] It can be understood that, according to the formula: R = p * L / S

[0201] In the formula, R is the resistance value; p is the resistivity, which is determined by the material of the busbar 30 itself; L is the length of the extension direction of the busbar 30; and S is the flow cross-sectional area of the busbar 30 perpendicular to the extension direction thereof. When the resistivity and the flow cross-sectional area are constant, the smaller the length of the extension direction of the busbar 30, the smaller the resistance. When the battery monomers 20 are arranged along the first direction F1, the at least partial overlap of the first electrode lead-out portion 231 and the second electrode lead-out portion 232 in the first direction F1 is conducive to shortening the distance between the first electrode lead-out portion 231 and the second electrode lead-out portion 232, and further shortening the extension direction of the busbar 30 for electrically connecting the first electrode lead-out portion 231 and the second electrode lead-out portion 232.

[0202] It can be understood that, in the state where the battery monomers 20 in the battery monomer group 10 are arranged along the first direction F1, the distance between the first electrode lead-out portion 231 and the second electrode lead-out portion 232 is the shortest in the portion where the first electrode lead-out portion 231 and the second electrode lead-out portion 232 overlap along the first direction F1.

[0203] In this way, by making the first electrode lead-out portion 231 and the second electrode lead-out portion 232 at least partially overlap in the first direction F1, the arrangement of the electrode lead-out portions 23 on the adjacent battery monomers 20 can be relatively concentrated, which is conducive to electrical connection. Moreover, this is conducive to shortening the distance between the first electrode lead-out portion 231 and the second electrode lead-out portion 232 that need to be electrically connected by the busbar 30, and further reducing the size of the busbar 30, thereby being conducive to reducing the resistance of the busbar 30 and improving the flow capacity of the busbar 30.

[0204] It should be noted that the first battery monomer 21 and the second battery monomer 22 are used to distinguish two adjacent battery monomers 20 along the first direction F1. The two battery monomers 20 can be battery monomers 20 of the same design specification, or can be battery monomers 20 of different design specifications.

[0205] In some embodiments, referring to FIGS. 3 to 5, the busbar 30 extends along the first direction F1 to electrically connect the first electrode lead-out portion 231 and the second electrode lead-out portion 232.

[0206] That is, the extension direction of the busbar 30 is the same as the arrangement direction of the battery monomers 20.

[0207] In this way, it is conducive to further shortening the size of the busbar 30 for electrically connecting the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby being conducive to further reducing the resistance of the busbar 30.

[0208] In some embodiments, referring to FIG. 6 and FIG. 7, FIG. 6 is a partial enlarged view of A1 in FIG. 3, and FIG. 7 is a partial enlarged view of A2 in FIG. 4. The first battery monomer 21 includes a first edge 21a and a second edge 21b opposite along the first direction F1, the first edge 21a is closer to the second battery monomer 22 than the second edge 21b, and the maximum distance between the first electrode lead-out part 231 and the first edge 21a is less than the maximum distance between the first electrode lead-out part 231 and the second edge 21b. That is, the minimum distance between the first electrode lead-out part 231 and the first edge 21a is S1, the minimum distance between the first electrode lead-out part 231 and the second edge 21b is S2, and S1 < S2.

[0209] The first edge 21a and the second edge 21b are two edges of the outer contour of the first battery monomer 20 at opposite ends along the first direction F1. Among them, the first edge 21a is located on the side of the second edge 21b close to the second battery monomer 20 along the first direction F1.

[0210] In this way, it is beneficial to make the first electrode lead-out part 231 closer to the second electrode lead-out part 232 along the first direction F1, which can make the arrangement of the electrode lead-out parts 23 that need to be point-connected by the busbar 30 more concentrated, and it is beneficial to further shorten the size of the busbar 30 required to electrically connect the first electrode lead-out part 231 and the second electrode lead-out part 232, thereby facilitating further reducing the resistance of the busbar 30.

[0211] In some embodiments, continuing to refer to FIG. 6 and FIG. 7, the second battery monomer 20 includes a third edge 22a and a fourth edge 22b opposite along the first direction F1, the third edge 22a is closer to the first battery monomer 21 than the fourth edge 22b, and the maximum distance between the second electrode lead-out part 232 and the third edge 22a is less than the maximum distance between the second electrode lead-out part 232 and the fourth edge 22b. That is, the minimum distance between the second electrode lead-out part 232 and the third edge 22a is S3, the minimum distance between the second electrode lead-out part 232 and the fourth edge 22b is S4, and S3 < S4.

[0212] The third edge 22a and the fourth edge 22b are two edges of the outer contour of the second battery monomer 22 at opposite ends along the first direction F1. Among them, the third edge 22a is located on the side of the fourth edge 22b close to the first battery monomer 21 along the first direction F1.

[0213] In this way, it is beneficial to make the second electrode lead-out part 232 closer to the first electrode lead-out part 231 along the first direction F1, which can make the arrangement of the electrode lead-out parts 23 that need to be point-connected by the busbar 30 more concentrated, and it is beneficial to further shorten the size of the busbar 30 required to electrically connect the first electrode lead-out part 231 and the second electrode lead-out part 232, thereby facilitating further reducing the resistance of the busbar 30.

[0214] The specific manner in which the current collector 30 is electrically connected to the first electrode lead-out portion 231 and the second electrode lead-out portion 232 is not limited. For example, the current collector 30 is made of a metal material, at least a portion of the first electrode lead-out portion 231 and at least a portion of the second electrode lead-out portion 232 are made of a metal material, and the current collector 30 is fixedly connected to the first electrode lead-out portion 231 and the second electrode lead-out portion 232 by welding to achieve electrical conduction.

[0215] The type of metal material used for the current collector 30, the first electrode lead-out portion 231, and the second electrode lead-out portion 232 is not limited, such as copper, aluminum, etc.

[0216] In some embodiments, referring to FIGS. 8 and 9, FIG. 8 is a partial enlarged view of A3 in FIG. 5, and FIG. 9 is a schematic view of FIG. 8 without the current collector 30 connecting the first electrode lead-out portion 231 and the second electrode lead-out portion 232. The first electrode lead-out portion 231 includes a first connecting portion 2311 connected to the current collector 30; the first battery monomer 20 includes a first edge 21a and a second edge 21b opposite to each other along the first direction F1, the first edge 21a is closer to the second battery monomer 22 than the second edge 21b, and the maximum distance between the first connecting portion 2311 and the first edge 21a is less than the maximum distance between the first connecting portion 2311 and the second edge 21b. That is, the maximum distance between the first connecting portion 2311 and the first edge 21a is D1, the maximum distance between the first connecting portion 2311 and the second edge 21b is D2, and D1 < D2.

[0217] The first connecting portion 2311 is a portion of the first electrode lead-out portion 231 used to achieve electrical connection with the current collector 30.

[0218] In this way, the first connecting portion 2311 is closer to the second electrode lead-out portion 232 along the first direction F1, which is conducive to further shortening the size of the current collector 30 required to achieve electrical connection between the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby facilitating further reduction of the resistance of the current collector 30.

[0219] In some embodiments, D1 and D2 satisfy: D2 ≥ 2 * D1, and D1 ≥ 3 mm.

[0220] In this way, on the one hand, the first connecting portion 2311 has sufficient spacing from the first edge 21a to facilitate installation of the first electrode lead-out portion 231; on the other hand, the first connecting portion 2311 can be closer to the second electrode lead-out portion 232 along the first direction F1, which is conducive to further shortening the size of the current collector 30 required to achieve electrical connection between the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby facilitating further reduction of the resistance of the current collector 30.

[0221] It can be understood that the battery cell 20 has at least two electrode lead-out portions 23, and polarities of the at least two electrode lead-out portions 23 are different.

[0222] In some embodiments, referring to FIG. 9, the first battery cell 21 has a maximum dimension D along the first direction F1, and D, D1 and D2 satisfy: D1≥3mm, D2≥0.5*D+3mm.

[0223] In this way, on the one hand, it is beneficial to make the first connecting portion 2311 have sufficient spacing from the first edge 21a so that the first electrode lead-out portion 231 can be mounted; on the other hand, it is beneficial to arrange another electrode lead-out portion 23 on the first battery cell 20, which has a similar dimension to the first electrode lead-out portion 231 along the first direction F1, on a side of the first electrode lead-out portion 231 away from the second battery cell 20 along the first direction F1.

[0224] In some embodiments, referring to FIG. 10, which is a schematic view of FIG. 8 with the busbar 30 connecting the first electrode lead-out portion 231 and the second electrode lead-out portion 232 removed, the second electrode lead-out portion 232 includes a third connecting portion 2321 connected to the busbar 30; the second battery cell 22 includes a third edge 22a and a fourth edge 22b opposite to each other along the first direction F1, the third edge 22a is closer to the first battery cell 21 than the fourth edge 22b, and a maximum distance between the third connecting portion 2321 and the third edge 22a is smaller than a maximum distance between the third connecting portion 2321 and the fourth edge 22b. That is, the maximum distance between the third connecting portion 2321 and the third edge 22a is D3, and the maximum distance between the third connecting portion 2321 and the fourth edge 22b is D4, and D3

[0225] The third connecting portion 2321, i.e., a portion of the second electrode lead-out portion 232 used to achieve electrical connection with the busbar 30.

[0226] In this way, it is beneficial to make the third connecting portion 2321 closer to the first electrode lead-out portion 231 along the first direction F1, and beneficial to further shorten a dimension required for the busbar 30 to achieve electrical connection between the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby beneficial to further reduce an electrical resistance of the busbar 30.

[0227] In some embodiments, referring to FIG. 10, D4 and D3 satisfy: D4≥2*D3, and D3≥3mm.

[0228] In this way, on the one hand, the third connecting portion 2321 is kept at a sufficient distance from the third edge 22a to allow the second electrode lead-out portion 232 to be mounted; on the other hand, the third connecting portion 2321 is allowed to be closer to the first electrode lead-out portion 231 in the first direction F1, which is conducive to further reducing the size of the busbar 30 required to electrically connect the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby being conducive to further reducing the electrical resistance of the busbar 30.

[0229] In some embodiments, referring to FIG. 10, the maximum size of the first battery cell 20 along the first direction F1 is D', and D', D3 and D4 satisfy: D3≥3mm, D4≥0.5*D'+3mm.

[0230] In this way, on the one hand, the third connecting portion 2321 is kept at a sufficient distance from the third edge 22a to allow the second electrode lead-out portion 232 to be mounted; on the other hand, the third connecting portion 2321 is allowed to be closer to the first electrode lead-out portion 231 in the first direction F1, which is conducive to further reducing the size of the busbar 30 required to electrically connect the first electrode lead-out portion 231 and the second electrode lead-out portion 232, thereby being conducive to further reducing the electrical resistance of the busbar 30.

[0231] In some embodiments, referring to FIGS. 7-10, in a projection plane perpendicular to the first direction F1, the projections of the first electrode lead-out portion 231 and the second electrode lead-out portion 232 along the first direction F1 are at least partially misaligned with each other.

[0232] That is, in the projection plane perpendicular to the first direction F1, a part of the projection of the first electrode lead-out portion 231 coincides with a part of the projection of the second electrode lead-out portion 232, while another part of the projection of the first electrode lead-out portion 231 is located outside the projection range of the second electrode lead-out portion 232.

[0233] In this way, the part of the first electrode lead-out portion 231 and the second electrode lead-out portion 232 that coincide along the first direction facilitates the electrical connection of the busbar 30, while the part of the first electrode lead-out portion 231 and the second electrode lead-out portion 232 that do not coincide along the first direction facilitates the contact of other devices in the battery 100, such as the tab inside the battery cell 20 or the sampling assembly 40 outside the battery cell 20, to reduce the probability of interference with the electrical connection of the busbar 30 and the first electrode lead-out portion 231.

[0234] In some embodiments, referring to FIG. 5 and FIG. 11, FIG. 11 is a perspective view of the structure in FIG. 5 after the busbar 30 is removed, the busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 along the second direction F2. The busbar 30 is not clamped between the first electrode lead-out part 231 and the second electrode lead-out part 232 along the first direction F1, so as to reduce the probability of damage caused by extrusion of the busbar 30 due to relative movement between the first battery monomer 21 and the second battery monomer 22 along the first direction F1, and facilitate assembly so that the busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232, respectively.

[0235] It can be understood that the resistance of the busbar 30 is inversely proportional to the cross-sectional area perpendicular to the current direction.

[0236] It can be understood that the current passes through the busbar 30 along the first direction F1 to transfer between the first electrode lead-out part 231 and the second electrode lead-out part 232, so the size of the cross-sectional area of the busbar 30 perpendicular to the first direction F1 is related to the resistance of the busbar 30, and the cross-sectional area of the busbar 30 perpendicular to the first direction F1 is related to the size along the second direction F2 and the size along the third direction F3 of the cross-section.

[0237] In some embodiments, continuing to refer to FIG. 5, and referring to FIG. 11 and FIG. 12 together, FIG. 12 is a partial top view of the position A3 in FIG. 5 along the second direction F2 after the busbar 30 is arranged. The third direction F3 is perpendicular to the first direction F1 and the second direction F2; the size of the part of the first electrode lead-out part 231 along the third direction F3 that coincides with the projection of the second electrode lead-out part 232 along the first direction F1 is L1, and the size of the part of the first electrode lead-out part 231 along the third direction F3 that is offset from the projection of the second electrode lead-out part 232 along the first direction F1 is L2, L1≥L2.

[0238] The busbar 30 is electrically connected to the part of the first electrode lead-out part 231 that coincides with the projection of the second electrode lead-out part 232 along the first direction.

[0239] In this way, under the condition that the size of the first electrode lead-out part 231 along the third direction F3 is constant, the size of the connection area of the busbar 30 and the first electrode lead-out part 231 along the third direction F3 can be increased, which is beneficial to increase the size of the busbar 30 along the third direction F3, and further beneficial to increase the cross-sectional area of the busbar 30 and reduce the resistance of the busbar 30.

[0240] It should be noted that Fig. 11 is a perspective view of the structure in Fig. 5 after the busbar 30 is removed. In some other embodiments, the structure in Fig. 4 can also be configured as the structure in these embodiments to have the same effect.

[0241] In some embodiments, L1≥2*L2. In this way, the size of the busbar 30 along the third direction F3 is further increased, thereby increasing the flow area of the busbar 30 and further reducing the resistance of the busbar 30.

[0242] It should be noted that Fig. 11 is a perspective view of the structure in Fig. 5 after the busbar 30 is removed. In some other embodiments, the structure in Fig. 4 can also be configured as the structure in these embodiments to have the same effect.

[0243] It can be understood that the size of the busbar 30 along the first direction F1 is positively correlated with the resistance of the busbar 30.

[0244] In some embodiments, referring back to Fig. 11 and also referring to Fig. 13, Fig. 13 is a partial top view of the structure in Fig. 5 along the second direction F2 at the position of A3 after the busbar 30 is arranged. The busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 along the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2. The size of the first electrode lead-out part 231 along the third direction F3 is greater than the size of the first electrode lead-out part 231 along the first direction F1. That is, the size of the first electrode lead-out part 231 along the third direction F3 is L3, the size of the first electrode lead-out part 231 along the first direction F1 is L4, and L3>L4.

[0245] In this way, the size of the busbar 30 along the third direction F3 is increased, thereby increasing the area of the cross section of the busbar 30 perpendicular to the first direction F1, reducing the resistance of the busbar 30, improving the flow capacity of the busbar 30, and improving the heating problem of the busbar 30 in the current-carrying state. It should be noted that Figs. 5 and 13 are examples of the structure in Fig. 5. In some other embodiments, the structures in Figs. 3 and 4 can also be configured as the structures in these embodiments to have the same effect.

[0246] In some embodiments, the size of the first electrode lead-out part 231 along the third direction F3 is greater than or equal to twice the size of the first electrode lead-out part 231 along the first direction F1. That is, L3≥2*L4.

[0247] Therefore, the size of the busbar 30 along the third direction F3 is further increased, the area of the cross section of the busbar 30 perpendicular to the first direction F1 is further increased, the resistance of the busbar 30 is further reduced, the current carrying capacity of the busbar 30 is improved, and the heating problem of the busbar 30 in the current-carrying state is improved. In some other embodiments, the structure in FIGS. 3 and 4 can also be configured as the structure in this embodiment to have the same effect.

[0248] It can be understood that the shape of the busbar 30 itself has a direct impact on the electrical connection effect, especially the welding effect, between the busbar 30 and the first electrode lead-out part 231 and the second electrode lead-out part 232.

[0249] In some embodiments, referring to FIGS. 14, 15, and 16, and FIGS. 17 and 18, FIG. 14 is an enlarged view of the layout at A3 in FIG. 5, FIG. 15 is a sectional view of the busbar 30 at B-B in FIG. 14, and FIG. 16 is a sectional view of the busbar 30 at C-C in FIG. 14. The busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 along the second direction F2 perpendicular to the first direction F1. The cross section of the part of the busbar 30 that coincides with the first electrode lead-out part 231 in the projection along the second direction F2 is a first cross section perpendicular to the first direction F1. The cross section of the part of the busbar 30 between the first electrode lead-out part 231 and the second electrode lead-out part 232 is a second cross section perpendicular to the first direction F1. The minimum thickness of the first cross section along the second direction F2 is less than the minimum thickness of the second cross section along the second direction F2.

[0250] Referring to FIGS. 15 and 16, or referring to FIGS. 17 and 18, the minimum thickness of the first cross section along the second direction F2 is H1, the minimum thickness of the second cross section along the second direction F2 is H2, and H1 < H2. It should be noted that in FIG. 18, the minimum thickness of the second cross section along the second direction F2 is the sum of the thicknesses of H2' and H2''.

[0251] It can be understood that the part of the busbar 30 that coincides with the first electrode lead-out part 231 in the projection along the second direction F2 is the part that needs to be electrically connected between the busbar 30 and the first electrode lead-out part 231, that is, the part that needs to be welded between the busbar 30 and the first electrode lead-out part 231.

[0252] In this way, on the one hand, by reducing the size of the part of the busbar 30 that coincides with the first electrode lead-out part 231 in the projection along the second direction F2 along the second direction F2, the welding difficulty of the busbar 30 and the first electrode lead-out part 231 is reduced, and the welding strength of the busbar 30 and the first electrode lead-out part 231 is improved. On the other hand, the cross-sectional area of the part of the busbar 30 that does not need to be welded perpendicular to the first direction F1 is increased, and the current carrying capacity of the busbar 30 is improved.

[0253] The specific structure of the busbar 30 is not limited to a single layer as in FIGS. 15 and 16, but can also be a multi-layer structure as in FIGS. 17 and 18.

[0254] For example, referring to FIGS. 17 and 18, and FIG. 19, the busbar 30 includes a plurality of layers of sub-busbars 31 stacked along the second direction F2 and connected to each other, and two adjacent layers of sub-busbars 31 along the second direction F2 are connected at one end along a third direction F3, which is perpendicular to both the first direction F1 and the second direction F2.

[0255] That is, the plurality of sub-busbars 31 are arranged along the second direction F2 relative to each other, and electrical conduction is achieved through the portions connected to each other and the portions adhered to each other between the sub-busbars 31.

[0256] In this way, by stacking the plurality of layers of sub-busbars 31 along the second direction F2 relative to each other, the overall size of the busbar 30 along the second direction F2 can be increased, which is conducive to increasing the area of the cross section of the busbar 30 perpendicular to the first direction F1, thereby reducing the electrical resistance of the busbar 30 and improving the current carrying capacity of the busbar 30.

[0257] In some embodiments, referring to FIG. 19, one of the layers of sub-busbars 31 closest to the first electrode lead-out portion 231 is connected to the first electrode lead-out portion 231, which is the first sub-busbar 31b in FIG. 19, and the other layers of sub-busbars 31 are arranged along the second direction F2 to overlap the area of the first electrode lead-out portion 231, and a through hole or a through slot is arranged along the second direction F2, which is the second sub-busbar 31a in FIG. 19, and the through hole or the through slot is shown as K in FIG. 19.

[0258] That is, only the layer of sub-busbars 31 closest to the electrode lead-out portion 23 along the second direction F2 is used for welding with the electrode lead-out portion 23, and the other sub-busbars 31 are only used to form a conductive path, and by arranging a through hole or a through slot along the second direction F2 in the other sub-busbars 31, the side surface of the layer of sub-busbars 31 closest to the electrode lead-out portion 23 along the second direction F2 is exposed to the outside, so that the minimum thickness of the first cross section along the second direction F2 is less than the minimum thickness of the second cross section along the second direction F2.

[0259] In this way, during the operation of welding the sub-busbar 31 with the electrode lead-out portion 23, only one sub-busbar 31 needs to be welded with the electrode lead-out portion 23, so that the heat generated during welding can quickly penetrate through the sub-busbar 31, which is conducive to improving the welding efficiency and improving the connection strength of the welding.

[0260] In some embodiments, referring to FIGS. 20-22, three structures are illustrated. The first battery cell 21 further includes a third electrode lead-out portion 233, and the first electrode lead-out portion 231 and the third electrode lead-out portion 233 at least partially overlap in the first direction F1 in a projection plane perpendicular to the first direction F1. The first electrode lead-out portion 231 and the third electrode lead-out portion 233 are asymmetric about the center of the wall surface.

[0261] The center of the wall surface where the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are located refers to the geometric center of the wall surface where the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are located.

[0262] The first electrode lead-out portion 231 and the third electrode lead-out portion 233 are asymmetric refers to that, taking a straight line passing through the center of the wall surface where the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are located and perpendicular to the wall surface as a rotation axis, after the battery cell 20 is rotated 180° about the rotation axis, the position of the first electrode lead-out portion 231 after rotation and the position of the third electrode lead-out portion 233 after rotation do not respectively coincide with the position of the third electrode lead-out portion 233 before rotation and the position of the first electrode lead-out portion 231 before rotation.

[0263] On the one hand, it can play a certain foolproof role, facilitate the identification of the placement direction of a single battery cell 20 being different from other battery cells 20, and reduce the probability of short circuit between two adjacent battery cells 20; on the other hand, it can be configured so that the first electrode lead-out portion 231 and the second electrode lead-out portion 232 can be offset on the wall surface, so as to form a larger area of free space on the wall surface to arrange other devices in the battery 100.

[0264] In this way, the first electrode lead-out portion 231 and the third electrode lead-out portion 233 can be asymmetric on the wall surface, and do not need to be symmetric, and the position of the electrode lead-out portion 23 can be more flexible, for example, multiple electrode lead-out portions 23 on the same battery cell 20 can be arranged to one side, so as to form a larger area of free space on the wall surface to arrange other devices in the battery 100.

[0265] The first electrode lead-out portion 231 and the third electrode lead-out portion 233 are located on the same battery cell 20, and have different polarities, one of which is a positive electrode and the other of which is a negative electrode.

[0266] In this way, the two battery 100 lead-out portions on a single battery cell 20 at least partially overlap each other in the first direction F1, which is conducive to the centralized arrangement of the electrode lead-out portions on a single battery cell 20, and is conducive to forming a regular area of the wall surface of the battery cell 20 to arrange other devices in the battery 100.

[0267] In some embodiments, referring to FIGS. 20-22, the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are located on the same wall surface of the battery cell 20, so that other wall surfaces of the battery cell 20 cooperate with other battery cells 20 and other devices in the battery 100.

[0268] In some embodiments, referring to FIGS. 20-22, the second battery cell 20 further includes a fourth electrode lead-out portion 234, the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 at least partially coincide in projection along the first direction F1 in a projection plane perpendicular to the first direction F1; the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are both located on the first wall surface 21c of the first battery cell 21, the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 are both located on the second wall surface 22c of the second battery cell 22, the first wall surface 21c and the second wall surface 22c are oriented in the same direction; the relative positions of the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 on the first wall surface 21c are the same as the relative positions of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 on the second wall surface 22c.

[0269] The first wall surface 21c and the second wall surface 22c being oriented in the same direction means that the normal directions of the first wall surface 21c and the second wall surface 22c are the same, and the normal directions of the two wall surfaces point in the same direction.

[0270] It can be understood that the first wall surface 21c and the second wall surface 22c can both be oriented toward one side of the second direction F2.

[0271] The relative distances between the edges of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the first direction F1 and the third direction F3, respectively, can correspond to the relative distances between the edges of the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 in the first direction F1 and the third direction F3, respectively; the relative distances between the edges of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the first direction F1 and the third direction F3 relative to the first wall surface 21c are the same as the relative distances between the edges of the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 in the first direction F1 and the third direction F3. That is, on the first battery cell 21 and the second battery cell 22, the design sizes of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 on the first wall surface 21c are the same as the design sizes of the second electrode lead-out portion 232 and the fourth electrode lead-out portion 234 on the second wall surface 22c.

[0272] Thus, the design of two adjacent battery monomers 20 in the battery monomer group 10 is facilitated, the production cost is reduced, and the size of the electrode lead-out part 23 connected by the busbar 30 is reduced, thereby reducing the resistance of the battery monomer 20.

[0273] In some embodiments, as shown in any one of FIG. 4, FIG. 5, FIG. 21 or FIG. 22, in a projection plane perpendicular to the first direction F1, the first electrode lead-out part 231 can be at least partially misaligned with the third electrode lead-out part 233 in the first direction F1.

[0274] That is, in a projection plane perpendicular to the first direction F1, at least part of the projection of the first electrode lead-out part 231 is located outside the projection range of the third electrode lead-out part 233.

[0275] Thus, the creepage distance between the two misaligned parts of the first electrode lead-out part 231 and the third electrode lead-out part 233 in the first direction is increased, thereby facilitating the electrical connection of the battery 100 to the electrical connection device with a higher requirement for the creepage distance, such as different sampling terminals of the sampling assembly 40, different pole tabs, etc., to improve the safety of the battery 100.

[0276] In some embodiments, the busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 in the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2, as shown in FIG. 23 and FIG. 24, the first electrode lead-out part 231 has a first end part 2312 in the third direction F3, in a projection plane perpendicular to the first direction F1, the projection of the first end part 2312 is misaligned with the projection of the third electrode lead-out part 233, and the third electrode lead-out part 233 has a second end part 2331 in the third direction F3, in a projection plane perpendicular to the first direction F1, the projection of the second end part 2331 is misaligned with the projection of the first electrode lead-out part 231.

[0277] That is, the part of the first electrode lead-out part 231 misaligned with the third electrode lead-out part 233 in the third direction F3 is the first end part 2312, which extends in the first direction F1 and is not blocked by the third electrode lead-out part 233; the part of the third electrode lead-out part 233 misaligned with the first electrode lead-out part 231 in the third direction F3 is the second end part 2331, which extends in the first direction F1 and is not blocked by the first electrode lead-out part 231.

[0278] Therefore, the creepage distance of the first end portion 2312 and the second end portion 2331 is further improved, the utilization of the first wall surface 21c is improved, the overall profile of the first electrode lead-out portion 231 and the overall profile of the second electrode lead-out portion 232 are increased, and the convenience of electrically connecting the first electrode lead-out portion 231 and the second electrode lead-out portion 232 to other devices in the battery 100 and other devices in the battery cell 20 is improved.

[0279] In some embodiments, referring to FIGS. 23 and 24, and referring to FIGS. 13 and 14, FIGS. 25 and 26 show the structure in FIG. 24 as an example, and FIG. 26 is a partial enlarged view of D in FIG. 25. The first battery cell 21 further includes a housing 24, a first internal connecting piece 25, and a second internal connecting piece 26. The first internal connecting piece 25 is located in the housing 24 and connected to the first end portion 2312. The second internal connecting piece 26 is located in the housing 24 and connected to the second end portion 2331. It should be noted that the first battery cell 21 in FIG. 23 can also be provided with the structure in this embodiment.

[0280] The specific type of the first internal connecting piece 25 is not limited, for example, a tab or a transition piece electrically connected to the tab, so that the first electrode lead-out portion 231 is electrically connected to the electrode assembly 27 through the first internal connecting piece 25.

[0281] The specific type of the second internal connecting piece 26 is not limited, for example, a tab or a transition piece electrically connected to the tab, so that the third electrode lead-out portion 233 is electrically connected to the electrode assembly 27 through the second internal connecting piece 26.

[0282] It can be understood that the electrode polarity of the first internal connecting piece 25 is different from that of the second internal connecting piece 26.

[0283] Therefore, the creepage distance between the first internal connecting piece 25 and the second internal connecting piece 26 is increased, and the use safety of the battery 100 is improved.

[0284] In some embodiments, referring to FIG. 24, the first end portion 2312 protrudes toward the third electrode lead-out portion 233 along the first direction F1. Therefore, the size of the first end portion 2312 is increased under the condition that the size of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 along the first direction F1 is constant, the size of the connection region between the first end portion 2312 and the first internal connecting piece 25 is increased, the overcurrent capacity is improved, and the arrangement of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 is more compact.

[0285] In some embodiments, referring to FIG. 24, in a projection plane perpendicular to the third direction F3, at least part of the projection of the first end portion 2312 is located in the projection of the portion of the third electrode lead-out portion 233 other than the second end portion 2331, to further facilitate the arrangement of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 to be more compact.

[0286] In some embodiments, referring to FIG. 24, the second end portion 2331 protrudes towards the first electrode lead-out portion 231 along the first direction F1.

[0287] In this way, it is beneficial to increase the size of the second end portion 2331 under the condition that the sizes of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 along the first direction F1 are certain, to increase the size of the connection area between the second end portion 2331 and the second inner connecting member 26, to improve the overcurrent capacity, to facilitate the arrangement of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 to be more compact, and at the same time, to increase the total outer surface area of the first electrode lead-out portion 231 and the third electrode lead-out portion 233, to improve the heat generation of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 during the passage of current, and to improve the use safety of the battery 100.

[0288] In some embodiments, referring to FIG. 12, in a projection plane perpendicular to the third direction F3, at least part of the projection of the second end portion 2331 is located in the projection of the portion of the first electrode lead-out portion 231 other than the first end portion 2312, to further facilitate the arrangement of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 to be more compact.

[0289] In some embodiments, the electrode lead-out portion 23 can be limited and fixed in various directions.

[0290] In some embodiments, referring to FIGS. 25-29, the battery monomer 20 further comprises a shell 24 and an electrode assembly 27, the shell 24 has an accommodation space 24a, the shell 24 comprises a first shell wall 241, and the electrode assembly 27 is arranged in the accommodation space 24a along the wall thickness direction of the first shell wall 241; the electrode lead-out portion 23 is arranged on the first shell wall 241, and the electrode lead-out portion 23 comprises a first electrode lead-out portion 231 and a third electrode lead-out portion 233, at least part of the first electrode lead-out portion 231 is arranged between the third electrode lead-out portion 233 and the first shell wall 241, and the first electrode lead-out portion 231 abuts against the third electrode lead-out portion 233.

[0291] The shell 24 is used to form at least part of the outer contour surface of the battery monomer 20. The accommodation space 24a in the shell 24 provides mounting space and protection for other devices in the battery monomer 20.

[0292] In some embodiments, the electrolyte can be stored in the accommodation space 24a, and an electrochemical reaction occurs between the electrode assembly 27 and the electrolyte to realize the charging and discharging function of the battery cell 20.

[0293] The shell wall refers to the physical structure of each inner wall of the shell 24 forming the accommodation space 24a.

[0294] The first shell wall 241 refers to any shell wall of the shell 24.

[0295] The electrode lead-out portion 23 penetrates the first shell wall 241 to electrically connect the electrode lead-out portion 23 with the electrode assembly 27, and part of the electrode lead-out portion 23 is located outside the shell 24 to electrically connect the electrode lead-out portion 23 with other devices in the battery 100.

[0296] At least part of the first electrode lead-out portion 231 is arranged between the third electrode lead-out portion 233 and the first shell wall 241, that is, a gap is formed between at least part of the third electrode lead-out portion 233 and the first shell wall 241, and at least part of the first electrode lead-out portion 231 is located in the gap formed by the two, so that the third electrode lead-out portion 233 and the first shell wall 241 can stop the first electrode lead-out portion 231 in the opposite direction of the two.

[0297] In this way, the first shell wall 241 and the third electrode lead-out portion 233 can directly limit the first electrode lead-out portion 231, which is beneficial to simplify the related parts for fixing the first electrode lead-out portion 231 on the battery cell 20 and reduce the number of parts.

[0298] In some embodiments, the thickness direction of the first shell wall 241 is the second direction F2.

[0299] It can be understood that the first wall surface 21c is the surface of the first shell wall 241 away from the accommodation space 24a.

[0300] In some embodiments, referring to FIGS. 28 and 29, part of the third electrode lead-out portion 233 is spaced apart from the first shell wall 241 in the second direction F2 to stop the first electrode lead-out portion 231 in the second direction F2.

[0301] In some embodiments, the polarity between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 can be different, and the shell 24 is made of a metal material and thus has electrical conductivity.

[0302] In some embodiments, referring to FIGS. 28 and 29, the third electrode lead-out portion 233 includes an electrode terminal 2332 and a first insulating member 2333, the electrode terminal 2332 is fixed with the first insulating member 2333, the first electrode lead-out portion 231 is at least partially arranged between the first insulating member 2333 and the first housing wall 241, and the first insulating member 2333 abuts against the first electrode lead-out portion 231.

[0303] The electrode terminal 2332 has electrical conductivity, is used to electrically connect with the electrode assembly 27, and a part of the electrode terminal 2332 is located outside the housing 24 so as to electrically connect with other devices in the battery 100.

[0304] The first insulating member 2333 has insulation.

[0305] In the present embodiment, the third electrode lead-out portion 233 is stopped and positioned between the first insulating member 2333 and the first housing wall 241, and the first insulating member 2333 separates the electrode terminal 2332 from the first electrode lead-out portion 231.

[0306] In this way, the first insulating member 2333 reduces the probability of direct electrical conduction between the third electrode lead-out portion 233 and the first electrode lead-out portion 231, and also reduces the risk of short circuit caused by direct electrical conduction between the electrode terminal 2332 and the first housing wall 241, thereby improving the use safety of the battery 100.

[0307] In some embodiments, referring to FIG. 29, the battery monomer 20 further includes a second insulating member 28, the second insulating member 28 is at least partially located between the first electrode lead-out portion 231 and the first housing wall 241. That is, the second insulating member 28 separates the first electrode lead-out portion 231 from the first housing wall 241.

[0308] The second insulating member 28 has insulation.

[0309] In this way, the second insulating member 28 reduces the risk of short circuit caused by direct electrical conduction between the first electrode lead-out portion 231 and the first housing wall 241, thereby improving the use safety of the battery 100.

[0310] The specific materials of the first insulating member 2333 and the second insulating member 28 are not limited, for example, engineering plastics.

[0311] In some embodiments, the first insulating member 2333 and the second insulating member 28 are integrally formed. That is, the first insulating member 2333 and the second insulating member 28 are different parts of the same integral component.

[0312] Therefore, the first insulating member 2333 and the second insulating member 28 are formed by one-time molding, which facilitates improving production efficiency, simplifying assembly process, and improving production efficiency of the battery monomer 20.

[0313] In some embodiments, referring to FIGS. 25-29, the first electrode lead-out portion 231 includes a first terminal plate 2314, at least a portion of the first terminal plate 2314 is disposed on a side of the first housing wall 241 away from the accommodation space 24a, the electrode terminal 2332 includes a second terminal plate 2332a, the second terminal plate 2332a is disposed on a side of the first housing wall 241 away from the accommodation space 24a, and the first insulating member 2333 is fixed to the first terminal plate 2314.

[0314] In the wall thickness direction of the first housing wall 241, the first terminal plate 2314, the first insulating member 2333, and the second terminal plate 2332a partially overlap, and the second terminal plate 2332a is partially disposed between the first insulating member 2333 and the first housing wall 241, and the first terminal plate 2314 abuts against the first insulating member 2333.

[0315] It can be understood that, due to the overlap of the first terminal plate 2314 and the first insulating member 2333 in the wall thickness direction of the first housing wall 241, the first terminal plate 2314 abuts against the first insulating member 2333 at least in the wall thickness direction of the first housing wall 241.

[0316] In these embodiments, the first terminal plate 2314 and the second terminal plate 2332a are located outside the housing 24, so that the first terminal plate 2314 and the second terminal plate 2332a are both used to electrically connect with other components in the battery 100, such as the busbar 30.

[0317] Therefore, the abutting part of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 is located outside the accommodation space 24a, which reduces the abutting position of the first electrode lead-out portion 231 and the third electrode lead-out portion 233, and the probability of interference between the abutting position and the position where the electrode assembly 27 is electrically connected with the first electrode lead-out portion 231 and the third electrode lead-out portion 233, respectively.

[0318] In some embodiments, referring to FIGS. 25 and 26, the first electrode lead-out portion 231 further includes a first terminal disc 2315, at least a portion of the first terminal disc 2315 is disposed on a side of the first housing wall 241 facing the accommodation space 24a, and the electrode terminal 2332 further includes a second terminal disc 2332b, the second terminal disc 2332b is disposed on a side of the first housing wall 241 facing the accommodation space 24a.

[0319] The first terminal plate 2315 is disposed at least partially between the second terminal plate 2332b and the first housing wall 241 along the wall thickness direction of the first housing wall 241, or the second terminal plate 2332b is disposed at least partially between the first terminal plate 2315 and the first housing wall 241 along the wall thickness direction of the first housing wall 241.

[0320] In these embodiments, the first terminal plate 2315 and the second terminal plate 2332b are located inside the housing 24, so that both the first terminal plate 2315 and the second terminal plate 2332b are used for electrical connection with the electrode assembly 27.

[0321] The first terminal plate 2315 is disposed at least partially between the second terminal plate 2332b and the first housing wall 241, and a portion of the first terminal plate 2315 is constrained by the second terminal plate 2332b and the first housing wall 241 along the wall thickness direction of the first housing wall 241.

[0322] The second terminal plate 2332b is disposed at least partially between the first terminal plate 2315 and the first housing wall 241, and a portion of the second terminal plate 2332b is constrained by the first terminal plate 2315 and the first housing wall 241 along the wall thickness direction of the first housing wall 241.

[0323] In this way, the first terminal plate 2315, the second terminal plate 2332b, and the first housing wall 241 can further limit the first electrode lead-out portion 231 or the third electrode lead-out portion 233 along the wall thickness direction of the first housing wall 241.

[0324] It can be understood that the first housing wall 241 is provided with at least two through holes communicating with the accommodation space 24a, one of which is used for the first electrode lead-out portion 231 to pass through, and the other of which is used for the second electrode lead-out portion 232 to pass through.

[0325] It can be understood that, in the projection plane perpendicular to the second direction F2, the projection of the through hole through which the first electrode lead-out portion 231 passes is at least partially located within the projection range of the first terminal plate 2314 and within the projection range of the first terminal plate 2315.

[0326] In the projection plane perpendicular to the second direction F2, the projection of the through hole through which the first electrode lead-out portion 231 passes is at least partially located within the projection range of the first terminal plate 2314 and within the projection range of the first terminal plate 2315.

[0327] In some embodiments, referring to FIG. 29, the third electrode lead-out portion 233 is provided with a first protruding portion 233a, and the first electrode lead-out portion 231 is provided with a first recessed portion 231a, the first protruding portion 233a and the first recessed portion 231a at least partially overlap in the wall thickness direction of the first housing wall 241, and the first protruding portion 233a and the first recessed portion 231a are matched with each other.

[0328] The first recessed portion 231a can form one or more recessed spaces for accommodating at least part of the first protruding portion 233a, and the inner wall of the recessed space formed by the first recessed portion 231a abuts against the first protruding portion 233a.

[0329] In this way, the first protruding portion 233a and the second protruding portion 231d achieve the purpose of abutting the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the wall thickness direction of the first housing wall 241.

[0330] In some embodiments, the first recessed portion 231a includes a first step portion 231b and a second step portion 231c, and the second step portion 231c is arranged on the side of the first step portion 231b away from the third electrode lead-out portion 233.

[0331] The first protruding portion 233a includes a first protruding portion provided on the electrode terminal 2332, and in the wall thickness direction of the first housing wall 241, part of the first electrode lead-out portion 231 is located between the first protruding portion and the first housing wall 241, and the first protruding portion is at least partially accommodated in the step space formed by the first step portion 231b.

[0332] The first protruding portion 233a further includes a first covering portion 2333a provided on the first insulating member 2333, and in the wall thickness direction of the first housing wall 241, part of the first electrode lead-out portion 231 is located between the first covering portion 2333a and the first housing wall 241, and the first covering portion 2333a is at least partially accommodated in the step space formed by the second step portion 231c.

[0333] Referring to FIG. 29, the first step portion 231b refers to the part of the first electrode lead-out portion 231 in the dashed line frame indicated by the mark 231b in the figure, and the second step portion 231c refers to the part of the first electrode lead-out portion 231 in the dashed line frame indicated by the mark 231c in the figure.

[0334] The step space formed by the first step portion 231b refers to the space formed by the physical structure of the first step portion 231b.

[0335] It can be understood that the step space formed by the first step portion 231b can limit the first protruding portion 2332c in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241.

[0336] The step space formed by the second step portion 231c refers to the space formed by the physical structure of the second step portion 231c.

[0337] It can be understood that the step space formed by the second step portion 231c can limit the first protruding portion 2332c in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241.

[0338] The first protruding portion 2332c can be separated from the first recessed portion 231a in the thickness direction of the first shell wall 241 by the first covering portion 2333a, so as to facilitate increasing the distance between the surface of the first protruding portion 2332c away from the first shell wall 241 in the thickness direction of the first shell wall 241 and the surface of the first electrode lead-out portion 231 away from the first shell wall 241 in the thickness direction of the first shell wall 241.

[0339] In this way, the first step portion 231b and the second step portion 231c facilitate limiting the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241, and increasing the creepage distance between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 by the first covering portion 2333a, thereby reducing the probability of short circuit between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 due to foreign matter and improving the use safety of the battery 100.

[0340] In some embodiments, referring to FIG. 29, the first protruding portion 2332c is part of the second terminal plate 2332a.

[0341] In some embodiments, referring to FIG. 29, part of the first covering portion 2333a is located in the step space formed by the first step portion 231b, so as to separate the first protruding portion 2332c and the first recessed portion 231a.

[0342] In some embodiments, in the thickness direction of the first shell wall 241, the height difference between the surface of the first terminal plate 2314 away from the first shell wall 241 and the surface of the second terminal plate 2332a away from the first shell wall 241 is greater than or equal to 0 and does not exceed 0.5 mm.

[0343] Thus, the probability of interference with other devices electrically connected to each other between the first electrode lead-out portion 231 and the second electrode lead-out portion 232 is reduced.

[0344] In some embodiments, referring to FIG. 29, along the wall thickness direction of the first housing wall 241, the first terminal plate 2314 is at least partially disposed between the second terminal plate 2332a and the first housing wall 241.

[0345] Thus, the first terminal plate 2314 is limited by the second terminal plate 2332a and the first housing wall 241.

[0346] It can be understood that the wall thickness direction of the first housing wall 241 is the second direction F2.

[0347] It can be understood that at least part of the first insulating member 2333 is located between the first terminal plate 2314 and the second terminal plate 2332a, and the second insulating member 28 is located between the second terminal plate 2332a and the first housing wall 241.

[0348] It can be understood that part of the first terminal plate 2314 forms the first end portion 2312, and another part forms the first connecting portion 2311; part of the second terminal plate 2332a forms the second end portion 2331.

[0349] In some embodiments, referring to FIG. 29, along the wall thickness direction of the first housing wall 241, the surface of the side of the first covering portion 2333a away from the first housing wall 241 is in the same plane as the surface of the side of the first terminal plate 2314 away from the first housing wall 241.

[0350] That is, along the wall thickness direction of the first housing wall 241, part of the surface of the first covering portion 2333a is flush with part of the surface of the first terminal plate 2314.

[0351] Thus, the probability of interference with other devices connected to the first terminal plate 2314 by the first covering portion 2333a is reduced.

[0352] In some embodiments, referring to FIG. 29, along the wall thickness direction of the first housing wall 241, the surface of the side of the first covering portion 2333a away from the first housing wall 241 is in the same plane as the surface of the side of the second terminal plate 2332a away from the first housing wall 241.

[0353] That is, along the wall thickness direction of the first housing wall 241, part of the surface of the first covering portion 2333a is flush with part of the surface of the second terminal plate 2332a.

[0354] In this way, the probability of the first cover portion 2333a interfering with other devices connected to the second terminal plate 2332a is reduced.

[0355] In some embodiments, referring to FIGS. 27 and 28, the first terminal plate 2314 includes a first body portion 2314a and a first extension portion 2314b connected to each other, and the second terminal plate 2332a includes a second body portion 2332e and a second extension portion 2332f connected to each other. The first extension portion 2314b and the second extension portion 2332f are located between the first body portion 2314a and the second body portion 2332e along the length direction of the first shell wall 241, and the first extension portion 2314b and the second extension portion 2332f are arranged in length along the width direction of the first shell wall 241.

[0356] The length direction of the first shell wall 241 refers to the length direction in the three-dimensional size of the first shell wall 241, i.e., the direction of the longest size.

[0357] The width direction of the first shell wall 241 refers to the straight line direction perpendicular to the length direction of the first shell wall 241 and the thickness direction of the first shell wall 241.

[0358] The first extension portion 2314b extends toward the second body portion 2332e along the length direction of the first shell wall 241, and the second extension portion 2332f extends toward the first body portion 2314a along the length direction of the first shell wall 241.

[0359] In this way, the first extension portion 2314b and the second extension portion 2332f facilitate electrical connection with the busbar 30, and the large space allowance of the first shell wall 241 in the length direction thereof is utilized to increase the contact area of the first extension portion 2314b and the second extension portion 2332f with the busbar 30, respectively. The first extension portion 2314b and the second extension portion 2332f are arranged in length along the width direction of the first shell wall 241, which facilitates more concentrated arrangement of the first extension portion 2314b and the second extension portion 2332f, and the first body portion 2314a and the second body portion 2332e are used to achieve electrical connection with other devices in the battery 100 such as the sampling assembly 40, thereby reducing the probability of interference between the first terminal plate 2314 and the second terminal plate 2332a and other devices in electrical connection.

[0360] In some embodiments, the length direction of the first shell wall 241 is the third direction F3, and the width direction of the first shell wall 241 is the first direction F1.

[0361] It can be understood that, in some embodiments, the first body portion 2314a forms the first end portion 2312, the first extension portion 2314b forms the first connection portion 2311, and the second body portion 2332e forms the second end portion 2331.

[0362] It can be understood that the first extension part 2314b and the second extension part 2332f are spaced apart along the first direction F1.

[0363] It can be understood that the size of each of the first extension part 2314b and the second extension part 2332f along the first direction F1 can only be small, so as to facilitate reducing the size of the battery monomer 20 along the first direction F1, and at the same time, facilitate reducing the size of the busbar 30 connected with the first extension part 2314b and the second extension part 2332f respectively along the first direction F1, so as to reduce the resistance of the busbar 30.

[0364] In some embodiments, referring to FIGS. 25 and 26, the first electrode lead-out part 231 further comprises a first terminal plate 2315, at least part of the first terminal plate 2315 is arranged on the side of the first shell wall 241 facing the accommodation space, the electrode terminal 2332 further comprises a second terminal plate 2332b, the second terminal plate 2332b is arranged on the side of the first shell wall 241 facing the accommodation space 24a, the first main body part 2314a and the first terminal plate 2315 are directly connected through a first connecting column 2316; the second main body part 2332e and the second terminal plate 2332b are directly connected through a second connecting column 2332g.

[0365] In this way, the electrical connection between the first terminal plate 2314 and the first terminal plate 2315 is realized, and the electrical connection between the second terminal plate 2332a and the second terminal plate 2332b is realized, which is conducive to reducing the through hole on the shell 24 for respectively penetrating the first electrode lead-out part 231 and the third electrode lead-out part 233.

[0366] It can be understood that part of the first shell wall 241 is located between the first main body part 2314a and the first terminal plate 2315, thereby realizing the limiting of the first main body part 2314a and the first terminal plate 2315 along the thickness direction of the first shell wall 241, thereby playing a positioning and restraining role on the first main body part 2314a; part of the first shell wall 241 is located between the second main body part 2332e and the second terminal plate 2332b, thereby realizing the limiting of the second main body part 2332e and the second terminal plate 2332b along the thickness direction of the first shell wall 241, thereby playing a positioning and restraining role on the second main body part 2332e.

[0367] The first extension part 2314b is far away from the first main body part 2314a, so it is less affected by the constraint, and is prone to problems such as warping in the thickness direction of the first shell wall 241, therefore, the first extension part 2314b needs to be further constrained.

[0368] In some embodiments, referring to FIGS. 27-29, the first recess 231a is arranged on the side of the first extension 2314b facing the electrode terminal 2332, and the first protrusion 233a is arranged on the side of the second main body 2332e facing the first electrode lead-out portion 231.

[0369] In this way, the second main body 2332e achieves the limiting and restraining effect of the first extension 2314b in the thickness direction of the first shell wall 241, thereby reducing the probability of the first extension 2314b being warped and affecting its normal function.

[0370] The second extension 2332f is less affected by the restraint and is more likely to be warped in the thickness direction of the first shell wall 241, so the second extension 2332f needs to be further restrained.

[0371] In some embodiments, referring to FIGS. 27, 30 and 31, the electrode terminal 2332 is further provided with a second recess 2332d, a portion of the first electrode lead-out portion 231 forms at least part of a second protrusion 231d, the second protrusion 231d at least partially overlaps the second recess 2332d in the thickness direction of the first shell wall 241, and the second protrusion 231d and the second recess 2332d cooperate with each other.

[0372] The second recess 2332d is arranged on the side of the second extension 2332f facing the first electrode lead-out portion 231, and the second protrusion 231d is arranged on the side of the first main body 2314a facing the electrode terminal 2332.

[0373] The first recess 231a of the first electrode lead-out portion 231 is located between the first protrusion 233a of the third electrode lead-out portion 233 and the first shell wall 241, and the second recess 2332d of the third electrode lead-out portion 233 is located between the second protrusion 231d of the first electrode lead-out portion 231 and the first shell wall 241, thereby achieving interlocking between the first electrode lead-out portion 231 and the third electrode lead-out portion 233.

[0374] In this way, the probability of the second extension 2332f being warped and affecting its normal function is reduced, and on the basis of achieving the limiting of the second extension 2332f, the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are further limited to each other, which is more conducive to fixing the relative positions of the two.

[0375] In some embodiments, referring to FIG. 31, the second recess 2332d includes a third stepped portion 2332h and a fourth stepped portion 2332j, and the fourth stepped portion 2332j is arranged on a side of the third stepped portion 2332h away from the first electrode lead-out portion 231;

[0376] The second protrusion 231d includes a second protruding portion 231e arranged on the first electrode lead-out portion 231, and a portion of the electrode terminal 2332 is located between the second protruding portion 231e and the first shell wall 241 along the thickness direction of the first shell wall 241, and the second protruding portion 231e is at least partially accommodated in the stepped space formed by the third stepped portion 2332h;

[0377] The battery monomer 20 further includes a second insulating member 28, and the second insulating member 28 is at least partially located between the first electrode lead-out portion 231 and the first shell wall 241. The second protrusion 231d further includes a second covering portion 28a arranged on the second insulating member 28, and a portion of the electrode terminal 2332 is located between the second covering portion 28a and the first shell wall 241 along the thickness direction of the first shell wall 241, and the second covering portion 28a is at least partially accommodated in the stepped space formed by the fourth stepped portion 2332j.

[0378] The third stepped portion 2332h refers to the portion belonging to the third electrode lead-out portion 233 in the dashed box indicated by 2332h in the figure; and the fourth stepped portion 2332j refers to the portion belonging to the third electrode lead-out portion 233 in the dashed box indicated by 2332j in the figure.

[0379] The stepped space formed by the third stepped portion 2332h refers to the space formed by the physical structure of the third stepped portion 2332h.

[0380] It can be understood that the stepped space formed by the third stepped portion 2332h can limit the second protruding portion 231e along the thickness direction of the first shell wall 241 and perpendicular to the thickness direction of the first shell wall 241.

[0381] The stepped space formed by the fourth stepped portion 2332j refers to the space formed by the physical structure of the fourth stepped portion 2332j.

[0382] It can be understood that the stepped space formed by the fourth stepped portion 2332j can limit the second covering portion 28a along the thickness direction of the first shell wall 241 and perpendicular to the thickness direction of the first shell wall 241.

[0383] Thus, the third step portion 2332h and the fourth step portion 2332j facilitate the limiting effect between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the wall thickness direction of the first shell wall 241 and perpendicular to the wall thickness direction of the first shell wall 241, further facilitating the stability of the interlocking between the first electrode lead-out portion 231 and the third electrode lead-out portion 233; the second cover portion 28a facilitates increasing the creepage distance between the first electrode lead-out portion 231 and the third electrode lead-out portion 233, reducing the probability of short circuit between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 due to foreign matter, and improving the use safety of the battery 100.

[0384] In some embodiments, referring to FIG. 31, the second extension portion 231e is part of the first terminal plate 2314.

[0385] In some embodiments, referring to FIG. 31, part of the second cover portion 28a is located in the step space formed by the third step portion 2332h, to separate the second protrusion portion 231d and the second recess portion 2332d.

[0386] In some embodiments, referring to FIGS. 27 and 31, the second extension portion 2332f is connected to the second terminal plate 2332b through the third connecting column 2332i, the first recess portion 231a is arranged on the side of the first extension portion 2314b facing the electrode terminal 2332, and the first protrusion portion 233a is arranged on the side of the second extension portion 2332f facing the first electrode lead-out portion 231.

[0387] Thus, the fixing of the second extension portion 2332f by the third connecting column 2332i indirectly achieves the purpose of preventing the first extension portion 2314b from being warped.

[0388] The fixing manner of the third connecting column 2332i relative to the first shell wall 241 is not limited, for example, riveting, etc.

[0389] In some embodiments, referring to FIG. 33, the current collector 30 is connected to the electrode lead-out portion 23 along the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2; the electrode lead-out portion 23 is located on the first wall surface 21c of the battery monomer 20, the first wall surface 21c includes a first boundary 21d and a second boundary 21e opposite along the third direction F3, and the minimum distance between the electrode lead-out portion 23 and the first boundary 21d is less than the minimum distance between the electrode lead-out portion 23 and the second boundary 21e. That is, the minimum distance between the electrode lead-out portion 23 and the first boundary 21d is L5, the minimum distance between the electrode lead-out portion 23 and the second boundary 21e is L6, and L5 < L6.

[0390] It should be noted that the minimum distance between the electrode lead-out part 23 and the first boundary 21d refers to the distance between the closest point of all electrode lead-out parts 23 on the first wall surface 21c to the first boundary 21d; the minimum distance between the electrode lead-out part 23 and the second boundary 21e refers to the distance between the closest point of all electrode lead-out parts 23 on the first wall surface 21c to the second boundary 21e.

[0391] In this way, it is beneficial to make the range of the first wall surface 21c located in the region where the electrode lead-out part 23 is close to the second boundary 21e along the third direction F3 larger, so as to facilitate the arrangement of other devices in the battery 100 in this region.

[0392] In some embodiments, referring to FIG. 33, the busbar 30 is connected to the electrode lead-out part 23 along the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2.

[0393] All electrode lead-out parts 23 on the same battery monomer 20 are located on the same wall surface, and the distance between the two farthest points of two adjacent electrode lead-out parts 23 on the same battery monomer 20 along the third direction F3 is less than or equal to one half of the maximum size of the wall surface along the third direction F3. That is, the distance between the two farthest points of two adjacent electrode lead-out parts 23 on the same battery monomer 20 along the third direction F3 is L7, and the maximum size of the wall surface along the third direction F3 is L8, L7≤L8.

[0394] In this way, on one wall surface, each electrode lead-out part 23 is arranged in a concentrated manner, so that through the cooperation of each electrode lead-out part 23, the strength of the pole post arrangement region in the wall surface and even the entire wall surface can be improved, which is beneficial to reduce the risk of deformation of the wall surface and improve the use safety of the battery monomer 20. In addition, it is beneficial to fully utilize other regions of the wall surface and other wall surfaces, and it is also beneficial to the centralized processing of the pole posts and other devices attached to the battery 100 during processing and maintenance.

[0395] In some embodiments, referring to FIG. 34, the battery 100 further comprises a sampling assembly 40, which is electrically connected to the battery monomer 20. The sampling assembly 40 can be located on the same side of all electrode lead-out parts 23 along the third direction F3.

[0396] The sampling assembly 40 is used to collect temperature, voltage and other information of the battery monomer 20 by being electrically connected to the battery monomer 20, and transmit these information to the battery management system (BMS) in the battery 100, so as to monitor the working state of the battery monomer 20.

[0397] In these embodiments, all the electrode lead-out portions 23 are arranged on the same side of the sampling assembly 40 along the third direction F3, and the sampling assembly 40 can be located on the same wall of the battery monomer 20 as all the electrode lead-out portions 23, or can be located on different walls. In this way, it is beneficial for the sampling assembly 40 to extend directly along the first direction F1 and achieve electrical connection with each battery monomer 20 in the battery monomer group 10, reducing the possibility of interference between the arrangement of the sampling assembly 40 and the electrode lead-out portions 23.

[0398] In some embodiments, referring to FIG. 34, the sampling assembly 40 and the electrode lead-out portion 23 are both located on the first wall 21c of the battery monomer 20. That is, the sampling assembly 40 and the electrode lead-out portion 23 are both located on the same wall of the battery monomer 20, which facilitates electrical connection between the sampling assembly 40 and each electrode lead-out portion 23, is beneficial for reducing the size of the sampling assembly 40 required to achieve electrical connection with the electrode lead-out portion 23, and is beneficial for making the overall size of the battery 100 more compact. It should be noted that the sampling assembly 40 of the present embodiment can also be arranged in the structures of the embodiments of FIGS. 3-5 and FIGS. 20-22, and can also have the excellent effects described in the present embodiment.

[0399] In some embodiments, continuing to refer to FIGS. 33 and 34, the first wall 21c includes a first boundary 21d and a second boundary 21e opposite along the third direction F3, the minimum distance between the electrode lead-out portion 23 and the first boundary 21d is less than the minimum distance between the electrode lead-out portion 23 and the second boundary 21e, and the sampling assembly 40 is at least partially located between the electrode lead-out portion 23 and the second boundary 21e.

[0400] In this way, a larger area for arranging the sampling assembly 40 can be formed on the first wall 21c, which is beneficial for improving the flexibility of the arrangement of the sampling assembly 40 and reducing the probability of interference between the arrangement of the sampling assembly 40 and the electrode lead-out portion 23. It should be noted that the sampling assembly 40 of the present embodiment can also be arranged in the structure of FIGS. 20 and 22, and can also have the excellent effects described in the present embodiment.

[0401] It can be understood that during the charging and discharging process of the battery monomer 20, the electrode lead-out portion 23 generates heat, and therefore the sampling assembly 40 needs to be able to collect temperature change information generated by the battery 100.

[0402] In some embodiments in which the sampling assembly 40 is provided, and the busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 along the second direction F2, the third direction F3 is perpendicular to the first direction F1 and the second direction F2, please refer to FIG. 34, and refer to FIG. 23 as well, the first electrode lead-out part 231 comprises a first connecting part 2311 and a second connecting part 2313 which are different in position, the first connecting part 2311 is connected to the busbar 30, and the second connecting part 2313 is connected to the sampling assembly 40, the minimum dimension of the first connecting part 2311 along the third direction F3 is greater than the minimum dimension of the second connecting part 2313 along the third direction F3.

[0403] It can be understood that the sampling assembly 40 has a lower requirement on the overcurrent capacity of the current than the busbar 30.

[0404] In this way, under the condition that the size of the electrode lead-out part 23 along the third direction F3 is constant, the first connecting part 2311 has a greater size along the third direction F3 than the second connecting part 2313, which is conducive to the busbar 30 having a greater size along the third direction F3, thereby being conducive to reducing the resistance of the busbar 30 and improving the overcurrent capacity of the busbar 30, and at the same time, the second connecting part 2313 is provided on the electrode lead-out part 23 for connecting the sampling assembly 40, which reduces the probability of interference between the busbar 30 and the sampling assembly 40.

[0405] It can be understood that a part of the sampling assembly 40 can be connected to the second connecting part 2313 along the second direction F2.

[0406] It can be understood that the second connecting part 2313 can be the first main part 2314a and the first end part 2312 in the foregoing.

[0407] In some embodiments, please refer to FIG. 35, the second connecting part 2313 is located at one end of the first electrode lead-out part 231 along the third direction F3 close to the sampling assembly 40 for connecting the sampling assembly 40, and the first connecting part 2311 is located at the other end of the first electrode lead-out part 231.

[0408] That is, the second connecting part 2313 is located between the first connecting part 2311 and the sampling assembly 40 along the third direction F3.

[0409] In this way, the second connecting part 2313 is closer to the sampling assembly 40 along the third direction F3, thereby being conducive to reducing the size required for the connection between the sampling assembly 40 and the second connecting part 2313, and further being conducive to reducing the probability of interference between the sampling assembly 40 and other devices causing problems in the collected information.

[0410] It can be understood that, during the current flowing through the busbar 30, heat will be generated due to the resistance of the busbar 30 itself.

[0411] In some embodiments, the sampling assembly 40 can also be connected to the busbar 30 to obtain some information required by the battery detection, such as at least one of voltage information, current information, and temperature information.

[0412] In some other embodiments, the sampling assembly 40 can be connected to both the busbar 30 and the electrode lead 23 to obtain some information required by the battery 100 detection, such as at least one of voltage information, current information, and temperature information, respectively.

[0413] In some embodiments in which the sampling assembly 40 is connected to the busbar 30, referring to FIG. 35, the busbars 30 adjacent to each other in the first direction F1 on the same battery monomer group 10 are projected to coincide in the first direction F1.

[0414] In this way, the arrangement of the busbars 30 in the battery 100 can be more concentrated, facilitating concentrated protection of the electrical connection area, saving the use of protective materials and reducing costs, and in some embodiments in which the sampling assembly 40 is connected to the busbar 30, the busbars 30 on the same battery monomer group 10 can be arranged in the first direction F1, which is conducive to making the size of each part of the sampling assembly 40 for connecting to the busbar 30 extending to each busbar 30 in the third direction F3 substantially the same, which is conducive to reducing the design and manufacturing costs of the sampling assembly 40.

[0415] It can be understood that, in the battery 100, there can be only one battery monomer group 10, or there can be multiple battery monomer groups 10.

[0416] In some embodiments, referring to FIGS. 36-39, the battery 100 includes a box 50, the box 50 including a receiving cavity 50a and a first box wall 51 for enclosing the receiving cavity 50a, and the first box wall 51 protrudes from an inner surface to an outer surface at least in part to form a recess 511 on the inner surface.

[0417] The battery monomer group 10 is located in the receiving cavity 50a. The space in the recess 511 is in communication with the receiving cavity 50a.

[0418] In this way, at least part of other devices in the battery 100 can be accommodated in the space of the recess 511, which is conducive to making the space for arranging the battery monomer 20 in the receiving cavity 50a more regular and improving the space utilization in the box 50.

[0419] In some embodiments, the first box wall 51 is the top cover 53.

[0420] In some embodiments, the electrode lead-out portion 23 protrudes from the surface of the battery cell 20.

[0421] In some embodiments, referring to FIG. 39, the recessed portion 511 can accommodate at least part of the electrode lead-out portion 23. In this way, the space shape in the accommodation cavity 50a is better adapted to the shape of the part of the electrode lead-out portion 23 outside the battery cell 20, which is conducive to improving the space utilization in the box body 50.

[0422] In some embodiments, referring to FIG. 39, the recessed portion 511 accommodates at least part of the busbar 30. In this way, the space occupied by the busbar 30 in the space in the accommodation cavity 50a for arranging the battery cell 20 is reduced, which is conducive to improving the space utilization.

[0423] It should be noted that FIG. 39 is only an example of some embodiments, and in other embodiments, the recessed portion 511 can not simultaneously accommodate the busbar 30 and the electrode lead-out portion 23 or other components in the battery 100, but can only accommodate one of them.

[0424] The embodiments of the present disclosure also provide a battery 100, which includes the battery 100 of any one of the preceding embodiments.

[0425] In this way, the more compact and concentrated arrangement of the electrode lead-out portion 23 is conducive to making the size of the battery 100 more compact, and thus is conducive to making the size of the electric device more compact.

[0426] The embodiments of the present disclosure also provide a vehicle 1000, referring to FIGS. 40 and 41, the vehicle 1000 includes a vehicle frame 400 and the battery 100 of any one of the preceding embodiments, the battery 100 is arranged on the vehicle frame 400, and the outer surface of the first box wall 51 forms a protruding portion 512 corresponding to the area of the recessed portion 511 in the wall thickness direction, and the protruding portion 512 faces the vehicle frame 400.

[0427] The vehicle frame 400 is at least part of the body-in-white of the vehicle 1000, and the vehicle frame 400 is provided with an accommodation compartment 400a.

[0428] The protruding portion 512 faces the vehicle frame 400, that is, at least part of the protruding portion 512 is located in the space of the accommodation compartment 400a.

[0429] In this way, the protruding portion 512 in the vehicle frame 400 is conducive to improving the space utilization in the vehicle 1000 and is conducive to improving the capacity of the battery 100 that can be carried by the vehicle 1000.

[0430] The accommodation compartment 400a can be a passenger compartment, a trunk, or the like.

[0431] In some embodiments, referring to FIG. 41, the vehicle frame 400 has a support beam 401, and the support beam 401 has a slot 401a, and the convex portion 512 is at least partially inserted into the slot 401a.

[0432] The support beam 401 is used to support other structures in the vehicle 1000 and improve the overall structural rigidity of the vehicle frame 400.

[0433] In this way, the convex portion 512 can utilize the internal space of the support beam 401 to improve the utilization of the internal space of the vehicle 1000, and the support beam 401 can also load the battery 100 to improve the structural rigidity of the vehicle.

[0434] The specific type of the support beam 401 is not limited, for example, a door sill, a side beam, etc.

[0435] The embodiments of the present disclosure also provide a battery cell 20, referring to FIGS. 3-5, the battery cell 20 is used in the battery 100, the battery cell 20 is configured as a plurality of and arranged along a first direction F1 in the battery 100, and the battery further includes a busbar 30;

[0436] The battery cell 20 includes a plurality of electrode lead-out portions 23, and the battery cell 20 is configured to connect the busbar 30 to the electrode lead-out portions 23 of the battery cells 20 arranged adjacent along the first direction F1.

[0437] In a projection plane perpendicular to the first direction F1, the projections of the at least two electrode lead-out portions 23 on the battery cell 20 at least partially overlap.

[0438] The structure of the battery cell 20 in the embodiments of the present disclosure is beneficial to make the arrangement position of the electrode lead-out portions 23 more concentrated and compact, beneficial to form a relatively regular space in the battery 100 when the battery cell 20 is arranged into a group and applied to the battery 100, so as to arrange other devices such as the busbar 30 and the sampling assembly 40 in the battery 100, beneficial to improve the space utilization in the battery 100, beneficial to make the arrangement of various devices in the battery 100 neat, and beneficial to improve the production and assembly efficiency of the battery 100. In addition, the arrangement of the busbar 30 in the battery 100 can also be more concentrated, which is beneficial to the concentrated protection of the connection area of the busbar 30.

[0439] In some embodiments, referring to FIG. 9 and FIG. 10, the battery cell 20 includes the first electrode lead-out part 231, the first electrode lead-out part 231 includes the first connecting part 2311 for connecting with the busbar 30, the battery cell 20 includes the first edge 21a and the second edge 21b opposite to each other along the first direction F1, the maximum distance between the first connecting part 2311 and the first edge 21a is less than the maximum distance between the first connecting part 2311 and the second edge 21b. That is, the maximum distance between the first connecting part 2311 and the first edge 21a is D1, the maximum distance between the first connecting part 2311 and the second edge 21b is D2, and D1 < D2.

[0440] In this way, it is beneficial to make the first electrode lead-out part 231 more close to other battery cells 20 in the battery 100 along the first direction F1, and it is beneficial to further shorten the size of the busbar 30 required to realize the electrical connection between the first electrode lead-out part 231 and the second electrode lead-out part 232, thereby further reducing the resistance of the busbar 30.

[0441] In some embodiments, referring to FIG. 20 to FIG. 22, which are three structures for illustration. The first battery cell 21 further includes the third electrode lead-out part 233, the first electrode lead-out part 231 and the third electrode lead-out part 233 at least partially coincide in projection along the first direction F1. The first electrode lead-out part 231 and the third electrode lead-out part 233 are asymmetric structures about the center of the wall surface.

[0442] In this way, the first electrode lead-out part 231 and the third electrode lead-out part 233 can be asymmetric structures on the wall surface, and do not need to be symmetric structures. The position of the electrode lead-out part 23 can be more flexible, for example, multiple electrode lead-out parts 23 on the same battery cell 20 can be arranged to one side to form a larger area of free space on the wall surface to arrange other devices in the battery 100.

[0443] In some embodiments, referring to any one of FIG. 4, FIG. 5, FIG. 21 or FIG. 22, the first electrode lead-out part 231 can be at least partially misaligned with the third electrode lead-out part 233 in projection along the first direction F1.

[0444] In this way, the creepage distance of the misaligned part of the first electrode lead-out part 231 relative to the third electrode lead-out part 233 is increased, and the creepage distance of the misaligned part of the third electrode lead-out part 233 relative to the first electrode lead-out part 231 is increased, thereby facilitating the electrical connection of devices with greater requirements for creepage distance in the battery 100 with the misaligned part of the first electrode lead-out part 231 and the misaligned part of the third electrode lead-out part 233, respectively, to improve the safety of the battery 100.

[0445] In some embodiments in which the busbar 30 is connected to the first electrode lead-out part 231 and the second electrode lead-out part 232 along the second direction F2, the third direction is perpendicular to the first direction F1 and the second direction F2, referring to FIG. 23 and FIG. 24, the first electrode lead-out part 231 has a first end part 2312 in the third direction F3, in a projection plane perpendicular to the first direction F1, the projection of the first end part 2312 is misaligned with the projection of the third electrode lead-out part 233, the third electrode lead-out part 233 has a second end part 2331 in the third direction F3, in a projection plane perpendicular to the first direction F1, the projection of the second end part 2331 is misaligned with the projection of the first electrode lead-out part 231.

[0446] In this way, the creepage distance of the first end part 2312 and the second end part 2331 is further improved, the utilization of the first wall surface 21c is improved, the overall profile of the first electrode lead-out part 231 and the overall profile of the second electrode lead-out part 232 are increased, and the convenience of the electrical connection between the first electrode lead-out part 231 and the second electrode lead-out part 232 and other devices in the battery 100 and other devices in the battery cell 20 is improved.

[0447] In some embodiments, referring to FIG. 24, the first end part 2312 protrudes towards the third electrode lead-out part 233 along the first direction F1. In this way, the size of the first end part 2312 is increased under the condition that the size of the first electrode lead-out part 231 and the third electrode lead-out part 233 along the first direction F1 is constant, the size of the connection area between the first end part 2312 and the first inner connecting part 25 is increased, the overcurrent capacity is improved, and the arrangement of the first electrode lead-out part 231 and the third electrode lead-out part 233 is more compact.

[0448] In some embodiments, referring to FIG. 24, the second end part 2331 protrudes towards the first electrode lead-out part 231 along the first direction F1.

[0449] In this way, the size of the second end part 2331 is increased under the condition that the size of the first electrode lead-out part 231 and the third electrode lead-out part 233 along the first direction F1 is constant, the size of the connection area between the second end part 2331 and the second inner connecting part 26 is increased, the overcurrent capacity is improved, and the arrangement of the first electrode lead-out part 231 and the third electrode lead-out part 233 is more compact. At the same time, the total outer surface area of the first electrode lead-out part 231 and the third electrode lead-out part 233 is increased, the heat generation of the first electrode lead-out part 231 and the third electrode lead-out part 233 during the current passing process is improved, and the use safety of the battery 100 is improved.

[0450] In some embodiments, referring to FIGS. 25-29, the battery cell 20 further includes a housing 24 having a receiving space 24a, and an electrode assembly 27 disposed in the receiving space 24a. The electrode lead-out portion 23 is disposed on a first housing wall 241 of the housing 24 along a wall thickness direction of the first housing wall 241. The electrode lead-out portion 23 includes a first electrode lead-out portion 231 and a third electrode lead-out portion 233. At least a portion of the first electrode lead-out portion 231 is disposed between the third electrode lead-out portion 233 and the first housing wall 241. The first electrode lead-out portion 231 abuts against the third electrode lead-out portion 233.

[0451] In this way, the first housing wall 241 and the third electrode lead-out portion 233 can directly limit the first electrode lead-out portion 231, which is conducive to simplifying the related components for fixing the first electrode lead-out portion 231 on the battery cell 20 and reducing the number of components.

[0452] In some embodiments, referring to FIGS. 28 and 29, the third electrode lead-out portion 233 includes an electrode terminal 2332 and a first insulating member 2333. The electrode terminal 2332 is fixed to the first insulating member 2333. The first electrode lead-out portion 231 is at least partially disposed between the first insulating member 2333 and the first housing wall 241. The first insulating member 2333 abuts against the first electrode lead-out portion 231.

[0453] In this way, the first insulating member 2333 reduces the probability of direct electrical conduction between the third electrode lead-out portion 233 and the first electrode lead-out portion 231, and also reduces the risk of short circuit caused by direct electrical conduction between the electrode terminal 2332 and the first housing wall 241, thereby improving the safety of the battery 100.

[0454] In some embodiments, referring to FIG. 29, the battery cell 20 further includes a second insulating member 28. The second insulating member 28 is at least partially located between the first electrode lead-out portion 231 and the first housing wall 241. That is, the second insulating member 28 separates the first electrode lead-out portion 231 and the first housing wall 241.

[0455] In this way, the second insulating member 28 reduces the risk of short circuit caused by direct electrical conduction between the first electrode lead-out portion 231 and the first housing wall 241, thereby improving the safety of the battery 100.

[0456] In some embodiments, the first insulating member 2333 and the second insulating member 28 are integrally formed. That is, the first insulating member 2333 and the second insulating member 28 are different parts of the same integral component.

[0457] Therefore, the first insulating member 2333 and the second insulating member 28 are formed by one-time molding, which facilitates improving production efficiency, simplifying assembly process, and improving production efficiency of the battery monomer 20.

[0458] In some embodiments, referring to FIGS. 25-29, the first electrode lead-out portion 231 includes a first terminal plate 2314, at least a portion of the first terminal plate 2314 is disposed on a side of the first housing wall 241 away from the accommodation space 24a, the electrode terminal 2332 includes a second terminal plate 2332a, the second terminal plate 2332a is disposed on a side of the first housing wall 241 away from the accommodation space 24a, and the first insulating member 2333 is fixed to the first terminal plate 2314.

[0459] In the wall thickness direction of the first housing wall 241, the first terminal plate 2314, the first insulating member 2333, and the second terminal plate 2332a partially overlap, and the second terminal plate 2332a is partially disposed between the first insulating member 2333 and the first housing wall 241, and the first terminal plate 2314 abuts against the first insulating member 2333.

[0460] It can be understood that, due to the overlap of the first terminal plate 2314 and the first insulating member 2333 in the wall thickness direction of the first housing wall 241, the first terminal plate 2314 abuts against the first insulating member 2333 at least in the wall thickness direction of the first housing wall 241.

[0461] In these embodiments, the first terminal plate 2314 and the second terminal plate 2332a are located outside the housing 24, so that the first terminal plate 2314 and the second terminal plate 2332a are both used to electrically connect with other components in the battery 100, such as the busbar 30.

[0462] Therefore, the abutting part of the first electrode lead-out portion 231 and the third electrode lead-out portion 233 is located outside the accommodation space 24a, which reduces the abutting position of the first electrode lead-out portion 231 and the third electrode lead-out portion 233, and the probability of interference between the abutting position and the position where the electrode assembly 27 is electrically connected with the first electrode lead-out portion 231 and the third electrode lead-out portion 233, respectively.

[0463] In some embodiments, referring to FIGS. 25 and 26, the first electrode lead-out portion 231 further includes a first terminal disc 2315, at least a portion of the first terminal disc 2315 is disposed on a side of the first housing wall 241 facing the accommodation space 24a, and the electrode terminal 2332 further includes a second terminal disc 2332b, the second terminal disc 2332b is disposed on a side of the first housing wall 241 facing the accommodation space 24a.

[0464] Along the wall thickness direction of the first housing wall 241, the first terminal plate 2315 is at least partially disposed between the second terminal plate 2332b and the first housing wall 241; or, along the wall thickness direction of the first housing wall 241, the second terminal plate 2332b is at least partially disposed between the first terminal plate 2315 and the first housing wall 241.

[0465] In these embodiments, the first terminal plate 2315 and the second terminal plate 2332b are located inside the housing 24 such that both the first terminal plate 2315 and the second terminal plate 2332b are used for electrical connection with the electrode assembly 27.

[0466] The first terminal block 2315 is at least partially disposed between the second terminal block 2332b and the first housing wall 241. This can be because a portion of the first terminal block 2315 is constrained by the second terminal block 2332b and the first housing wall 241 along the wall thickness direction of the first housing wall 241.

[0467] The second terminal block 2332b is at least partially disposed between the first terminal block 2315 and the first housing wall 241. Specifically, a portion of the second terminal block 2332b may be constrained by the first terminal block 2315 and the first housing wall 241 along the wall thickness direction of the first housing wall 241.

[0468] Thus, the first terminal block 2315, the second terminal block 2332b, and the first housing wall 241 can further limit the first electrode lead-out portion 231 or the third electrode lead-out portion 233 along the wall thickness direction of the first housing wall 241.

[0469] It is understood that at least two through holes are provided on the first housing wall 241 to connect the receiving space 24a. One through hole is used for the first electrode lead-out portion 231 to pass through, and the other through hole is used for the second electrode lead-out portion 232 to pass through.

[0470] It is understood that, in the projection plane perpendicular to the second direction F2, the projection of the through hole through which the first electrode lead-out portion 231 passes is at least partially located within the projection range of the first terminal plate 2314 and within the projection range of the first terminal disk 2315.

[0471] In the projection plane perpendicular to the second direction F2, the projection of the through hole through which the first electrode lead-out portion 231 passes is at least partially located within the projection range of the first terminal plate 2314 and within the projection range of the first terminal disk 2315.

[0472] In some embodiments, referring to FIG. 29, the third electrode lead-out portion 233 is provided with a first protruding portion 233a, and the first electrode lead-out portion 231 is provided with a first recessed portion 231a, the first protruding portion 233a and the first recessed portion 231a at least partially overlap along the wall thickness direction of the first housing wall 241, and the first protruding portion 233a and the first recessed portion 231a are matched with each other.

[0473] The first recessed portion 231a can form one or more recessed spaces for accommodating at least part of the first protruding portion 233a, and the inner wall of the recessed space formed by the first recessed portion 231a abuts against the first protruding portion 233a.

[0474] In this way, the first protruding portion 233a and the second protruding portion 231d achieve the purpose of abutting the first electrode lead-out portion 231 and the third electrode lead-out portion 233 along the wall thickness direction of the first housing wall 241.

[0475] In some embodiments, the first recessed portion 231a includes a first stepped portion 231b and a second stepped portion 231c, and the second stepped portion 231c is arranged on the side of the first stepped portion 231b away from the third electrode lead-out portion 233.

[0476] The first protruding portion 233a includes a first protruding portion 2332c provided by the electrode terminal 2332, and along the wall thickness direction of the first housing wall 241, part of the first electrode lead-out portion 231 is located between the first protruding portion 2332c and the first housing wall 241, and the first protruding portion 2332c is at least partially accommodated in the stepped space formed by the first stepped portion 231b.

[0477] The first protruding portion 233a further includes a first covering portion 2333a provided by the first insulating member 2333, and along the wall thickness direction of the first housing wall 241, part of the first electrode lead-out portion 231 is located between the first covering portion 2333a and the first housing wall 241, and the first covering portion 2333a is at least partially accommodated in the stepped space formed by the second stepped portion 231c.

[0478] Referring to FIG. 29, the first stepped portion 231b refers to the part of the first electrode lead-out portion 231 in the dashed line frame indicated by the mark 231b in the figure, and the second stepped portion 231c refers to the part of the first electrode lead-out portion 231 in the dashed line frame indicated by the mark 231c in the figure.

[0479] The stepped space formed by the first stepped portion 231b refers to the space formed by the physical structure of the first stepped portion 231b.

[0480] It can be understood that the step space formed by the first step portion 231b can limit the first protruding portion 2332c in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241.

[0481] The step space formed by the second step portion 231c refers to the space formed by the physical structure of the second step portion 231c.

[0482] It can be understood that the step space formed by the second step portion 231c can limit the first protruding portion 2332c in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241.

[0483] The first protruding portion 2332c can be separated from the first recessed portion 231a in the thickness direction of the first shell wall 241 by the first covering portion 2333a, so as to facilitate increasing the distance between the surface of the first protruding portion 2332c away from the first shell wall 241 in the thickness direction of the first shell wall 241 and the surface of the first electrode lead-out portion 231 away from the first shell wall 241 in the thickness direction of the first shell wall 241.

[0484] In this way, the first step portion 231b and the second step portion 231c facilitate limiting the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the thickness direction of the first shell wall 241 and the direction perpendicular to the thickness direction of the first shell wall 241, and increasing the creepage distance between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 by the first covering portion 2333a, thereby reducing the probability of short circuit between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 due to foreign matter and improving the use safety of the battery 100.

[0485] In some embodiments, referring to FIG. 29, the first protruding portion 2332c is part of the second terminal plate 2332a.

[0486] In some embodiments, referring to FIG. 29, part of the first covering portion 2333a is located in the step space formed by the first step portion 231b, so as to separate the first protruding portion 2332c and the first recessed portion 231a.

[0487] In some embodiments, in the thickness direction of the first shell wall 241, the height difference between the surface of the first terminal plate 2314 away from the first shell wall 241 and the surface of the second terminal plate 2332a away from the first shell wall 241 is greater than or equal to 0 and does not exceed 0.5 mm.

[0488] Therefore, the probability of interference between the first electrode lead-out portion 231 and the second electrode lead-out portion 232 and other devices electrically connected to each other on the other one is reduced.

[0489] In some embodiments, referring to FIGS. 27 and 28, the first terminal plate 2314 includes a first main body portion 2314a and a first extension portion 2314b connected to each other, and the second terminal plate 2332a includes a second main body portion 2332e and a second extension portion 2332f connected to each other. The first extension portion 2314b and the second extension portion 2332f are located between the first main body portion 2314a and the second main body portion 2332e along the length direction of the first housing wall 241, and the first extension portion 2314b and the second extension portion 2332f are arranged in length along the width direction of the first housing wall 241.

[0490] Therefore, the first extension portion 2314b and the second extension portion 2332f facilitate the electrical connection with the busbar 30, and the first extension portion 2314b and the second extension portion 2332f are arranged in length along the width direction of the first housing wall 241, which facilitates the arrangement of the first extension portion 2314b and the second extension portion 2332f to be more concentrated. The first main body portion 2314a and the second main body portion 2332e are electrically connected to other devices in the battery 100, such as the sampling assembly 40, which reduces the probability of interference between the first terminal plate 2314 and other devices and the second terminal plate 2332a and other devices, respectively.

[0491] In some embodiments, referring to FIGS. 25 and 26, the first electrode lead-out portion 231 further includes a first terminal disc 2315, at least a portion of the first terminal disc 2315 is arranged on the side of the first housing wall 241 facing the accommodation space, and the electrode terminal 2332 further includes a second terminal disc 2332b arranged on the side of the first housing wall 241 facing the accommodation space 24a. The first main body portion 2314a and the first terminal disc 2315 are directly connected by a first connecting column 2316, and the second main body portion 2332e and the second terminal disc 2332b are directly connected by a second connecting column 2332g.

[0492] Therefore, the electrical connection between the first terminal plate 2314 and the first terminal disc 2315 is achieved, and the electrical connection between the second terminal plate 2332a and the second terminal disc 2332b is achieved, which facilitates the reduction of the through hole on the housing 24 for respectively penetrating the first electrode lead-out portion 231 and the third electrode lead-out portion 233.

[0493] In some embodiments, referring to FIGS. 27-29, the first recess 231a is arranged on the side of the first extension 2314b facing the electrode terminal 2332, and the first protrusion 233a is arranged on the side of the second main body 2332e facing the first electrode lead-out portion 231.

[0494] In this way, the second main body 2332e achieves the limiting and restraining effect of the first extension 2314b in the thickness direction of the first shell wall 241, thereby reducing the probability of the first extension 2314b being warped and affecting its normal function.

[0495] In some embodiments, referring to FIGS. 27, 30 and 31, the electrode terminal 2332 is further provided with a second recess 2332d, a portion of the first electrode lead-out portion 231 forms at least part of a second protrusion 231d, the second protrusion 231d and the second recess 2332d at least partially overlap in the thickness direction of the first shell wall 241, and the second protrusion 231d and the second recess 2332d cooperate with each other.

[0496] The second recess 2332d is arranged on the side of the second extension 2332f facing the first electrode lead-out portion 231, and the second protrusion 231d is arranged on the side of the first main body 2314a facing the electrode terminal 2332.

[0497] The first recess 231a of the first electrode lead-out portion 231 is located between the first protrusion 233a of the third electrode lead-out portion 233 and the first shell wall 241, and the second recess 2332d of the third electrode lead-out portion 233 is located between the second protrusion 231d of the first electrode lead-out portion 231 and the first shell wall 241, thereby achieving interlocking between the first electrode lead-out portion 231 and the third electrode lead-out portion 233.

[0498] In this way, the probability of the second extension 2332f being warped and affecting its normal function is reduced, and on the basis of achieving the limiting of the second extension 2332f, the first electrode lead-out portion 231 and the third electrode lead-out portion 233 are further limited to each other, which is more conducive to fixing the relative positions of the two.

[0499] In some embodiments, referring to FIG. 31, the second recess 2332d includes a third step portion 2332h and a fourth step portion 2332j, and the fourth step portion 2332j is arranged on the side of the third step portion 2332h away from the first electrode lead-out portion 231.

[0500] The second protruding portion 231d includes a second protruding portion 231e provided on the first electrode lead-out portion 231, and a portion of the electrode terminal 2332 is located between the second protruding portion 231e and the first housing wall 241 in the thickness direction of the first housing wall 241, and the second protruding portion 231e is at least partially accommodated in a step space formed by the third stepped portion 2332h;

[0501] The battery cell 20 further includes a second insulating member 28 located at least partially between the first electrode lead-out portion 231 and the first housing wall 241, and the second protruding portion 231d further includes a second covering portion 28a provided on the second insulating member 28, and a portion of the electrode terminal 2332 is located between the second covering portion 28a and the first housing wall 241 in the thickness direction of the first housing wall 241, and the second covering portion 28a is at least partially accommodated in a step space formed by the fourth stepped portion 2332j.

[0502] The third stepped portion 2332h refers to the portion belonging to the third electrode lead-out portion 233 in the dashed line frame indicated by 2332h in the figure; and the fourth stepped portion 2332j refers to the portion belonging to the third electrode lead-out portion 233 in the dashed line frame indicated by 2332j in the figure.

[0503] The step space formed by the third stepped portion 2332h refers to the space formed by the physical structure of the third stepped portion 2332h.

[0504] It can be understood that the step space formed by the third stepped portion 2332h can limit the second protruding portion 231e in the thickness direction of the first housing wall 241 and the direction perpendicular to the thickness direction of the first housing wall 241.

[0505] The step space formed by the fourth stepped portion 2332j refers to the space formed by the physical structure of the fourth stepped portion 2332j.

[0506] It can be understood that the step space formed by the fourth stepped portion 2332j can limit the second covering portion 28a in the thickness direction of the first housing wall 241 and the direction perpendicular to the thickness direction of the first housing wall 241.

[0507] Thus, the third step portion 2332h and the fourth step portion 2332j facilitate the limiting effect between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 in the wall thickness direction of the first housing wall 241 and perpendicular to the wall thickness direction of the first housing wall 241, further facilitating the stability of the interlocking between the first electrode lead-out portion 231 and the third electrode lead-out portion 233; the second covering portion 28a facilitates increasing the creepage distance between the first electrode lead-out portion 231 and the third electrode lead-out portion 233, reducing the probability of short circuit between the first electrode lead-out portion 231 and the third electrode lead-out portion 233 due to foreign matter, and improving the use safety of the battery 100.

[0508] In some embodiments, referring to FIG. 33, the current collector 30 is connected to the electrode lead-out portion 23 along the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2; the electrode lead-out portion 23 is located on the first wall surface 21c of the battery monomer 20, the first wall surface 21c includes a first boundary 21d and a second boundary 21e opposite along the third direction F3, and the minimum distance between the electrode lead-out portion 23 and the first boundary 21d is less than the minimum distance between the electrode lead-out portion 23 and the second boundary 21e. That is, the minimum distance between the electrode lead-out portion 23 and the first boundary 21d is L5, the minimum distance between the electrode lead-out portion 23 and the second boundary 21e is L6, and L5 < L6.

[0509] Thus, it is beneficial to make the range of the first wall surface 21c located in the region of the electrode lead-out portion 23 close to the second boundary 21e along the third direction F3 larger, and facilitate arranging other devices in the battery 100 in this region.

[0510] In some embodiments, referring to FIG. 33, the current collector 30 is connected to the electrode lead-out portion 23 along the second direction F2, and the third direction F3 is perpendicular to the first direction F1 and the second direction F2;

[0511] All the electrode lead-out portions 23 on the same battery monomer 20 are located on the same wall surface, and the distance between the two farthest points of the two adjacent electrode lead-out portions 23 on the same battery monomer 20 along the third direction F3 is less than or equal to half of the maximum size of the wall surface along the third direction F3. That is, the distance between the two farthest points of the two adjacent electrode lead-out portions 23 on the same battery monomer 20 along the third direction F3 is L7, and the maximum size of the wall surface along the third direction F3 is L8, and L7 ≤ L8.

[0512] In this way, on one wall surface, the electrode lead-out portions 23 are arranged in a concentrated manner, and thus, by the cooperation of the electrode lead-out portions 23, the strength of the region in which the electrode lead-out portions 23 are provided in the wall surface, or even the entire wall surface, can be improved, which is conducive to reducing the risk of deformation of the wall surface and improving the use safety of the battery monomer 20. In addition, it is conducive to the full use of other regions of the wall surface and other wall surfaces, and it is also conducive to the centralized processing of the electrode lead-out portions 23 and other devices in the attached battery 100 during processing and maintenance.

[0513] The various embodiments / implementation forms provided by the present disclosure can be combined with each other without producing contradictions.

[0514] The above is only a preferred embodiment of the present disclosure and is not intended to limit the embodiments in the present disclosure. For those skilled in the art, the embodiments of the present disclosure can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure shall be included in the protection scope of the embodiments of the present disclosure. Industrial applicability

[0515] The embodiments of the present disclosure provide a battery, a power utilization device, a vehicle and a battery monomer which are conducive to realizing concentrated arrangement of electrode lead-out portions.

Claims

1. A battery, wherein, The battery comprises: a battery cell group comprising a plurality of battery cells arranged along a first direction, the battery cells comprising a plurality of electrode lead-out portions; a current collector connected to the electrode lead-out portions of the battery cells arranged adjacently along the first direction; in a projection plane perpendicular to the first direction, projections of at least two electrode lead-out portions on a same battery cell at least partially overlap.

2. The battery of claim 1, wherein, in a projection plane perpendicular to the first direction, projections of the electrode lead-out portions on two battery cells adjacently arranged along the first direction at least partially overlap.

3. The battery of claim 2, wherein, The battery cell group comprises a first battery cell and a second battery cell adjacently arranged along the first direction, the electrode lead-out portions comprise a first electrode lead-out portion on the first battery cell and a second electrode lead-out portion on the second battery cell, in a projection plane perpendicular to the first direction, projections of the first electrode lead-out portion and the second electrode lead-out portion along the first direction at least partially overlap each other; The current collector extends along the first direction to connect the first electrode lead-out portion and the second electrode lead-out portion at a position where the projections of the first electrode lead-out portion and the second electrode lead-out portion along the first direction overlap each other.

4. The battery of claim 3, wherein, The first battery cell comprises a first edge and a second edge opposite to each other along the first direction, the first edge is closer to the second battery cell than the second edge, a maximum distance between the first electrode lead-out portion and the first edge is smaller than a maximum distance between the first electrode lead-out portion and the second edge. The second battery cell comprises a third edge and a fourth edge opposite to each other along the first direction, the third edge is closer to the first battery cell than the fourth edge, a maximum distance between the second electrode lead-out portion and the third edge is smaller than a maximum distance between the second electrode lead-out portion and the fourth edge.

5. The battery of claim 3 or 4, wherein, The first electrode lead-out portion comprises a first connecting portion connected to the current collector. The first battery cell comprises a first edge and a second edge opposite to each other along the first direction, the first edge is closer to the second battery cell than the second edge, a maximum distance between the first connecting portion and the first edge is smaller than a maximum distance between the first connecting portion and the second edge.

6. The battery of claim 5, wherein, The maximum distance between the first connecting portion and the first edge is D1, the maximum distance between the first connecting portion and the second edge is D2, D2≥2*D1 and D1≥3mm.

7. The battery of claim 5, wherein, The maximum dimension of the first battery cell along the first direction is D, the maximum distance between the first connecting portion and the first edge is D1, the maximum distance between the first connecting portion and the second edge is D2, D1≥3mm and D2≥0.5*D+3mm.

8. The battery of any one of claims 3-7, wherein, In a projection plane perpendicular to the first direction, projections of the first electrode lead-out portion and the second electrode lead-out portion along the first direction at least partially misalign with each other.

9. The battery of claim 8, wherein, The current collector is connected to the first electrode lead-out portion and the second electrode lead-out portion along a second direction, a third direction perpendicular to the first direction and the second direction. A dimension of a portion of the first electrode lead-out part that coincides with a projection of the second electrode lead-out part along the first direction along the third direction is L1, and a dimension of a portion of the first electrode lead-out part that is misaligned with the projection of the second electrode lead-out part along the first direction along the third direction is L2, and L1≥L2.

10. The battery of claim 9, wherein, L1≥2*L2.

11. The battery of any one of claims 3-10, wherein, The busbar is connected to the first electrode lead-out part and the second electrode lead-out part along a second direction, and the third direction is perpendicular to the first direction and the second direction. A dimension of the first electrode lead-out part along the third direction is greater than a dimension of the first electrode lead-out part along the first direction.

12. The battery of claim 11, wherein, A dimension of the first electrode lead-out part along the third direction is greater than or equal to twice a dimension of the first electrode lead-out part along the first direction.

13. The battery of any one of claims 3-12, wherein, The busbar is connected to the first electrode lead-out part and the second electrode lead-out part along a second direction, and the second direction is perpendicular to the first direction. A cross section of a portion of the busbar that coincides with a projection of the first electrode lead-out part along the second direction is a first cross section, and a cross section of a portion of the busbar between the first electrode lead-out part and the second electrode lead-out part is a second cross section, and a minimum thickness of the first cross section along the second direction is less than a minimum thickness of the second cross section along the second direction.

14. The battery of any one of claims 3-13, wherein, The busbar is connected to the first electrode lead-out part and the second electrode lead-out part along a second direction, and the second direction is perpendicular to the first direction. The busbar includes a plurality of layers of busbar sub-pieces that are stacked along the second direction and connected to each other, and two adjacent layers of busbar sub-pieces along the second direction are connected at one end along a third direction, and the third direction is perpendicular to the first direction and the second direction.

15. The battery of claim 14, wherein, A layer of the plurality of layers of busbar sub-pieces closest to the first electrode lead-out part is connected to the first electrode lead-out part, and other layers of the plurality of layers of busbar sub-pieces are provided with through holes or through slots that penetrate along the second direction in a region that projects onto the first electrode lead-out part along the second direction.

16. The battery of any one of claims 3 to 15, wherein, The first battery monomer further includes a third electrode lead-out part, and in a projection plane perpendicular to the first direction, the first electrode lead-out part and the third electrode lead-out part at least partially coincide in projection along the first direction.

17. The battery of claim 16, wherein, The second battery monomer further includes a fourth electrode lead-out part, and in a projection plane perpendicular to the first direction, the second electrode lead-out part and the fourth electrode lead-out part at least partially coincide in projection along the first direction. The first electrode lead-out part and the third electrode lead-out part are located on a first wall surface of the first battery monomer, and the second electrode lead-out part and the fourth electrode lead-out part are located on a second wall surface of the second battery monomer, and the first wall surface and the second wall surface face the same direction. The relative positions of the second electrode lead-out part and the fourth electrode lead-out part on the second wall surface are the same as the relative positions of the first electrode lead-out part and the third electrode lead-out part on the first wall surface.

18. The battery of claim 16 or 17, wherein, In a projection plane perpendicular to the first direction, a projection of the first electrode lead-out portion and a projection of the third electrode lead-out portion along the first direction are at least partially misaligned.

19. The battery of claim 18, wherein, The busbar is connected to the first electrode lead-out portion and the second electrode lead-out portion along a second direction, and a third direction is perpendicular to the first direction and the second direction. The first electrode lead-out portion has a first end portion in the third direction, and in a projection plane perpendicular to the first direction, a projection of the first end portion is misaligned with a projection of the third electrode lead-out portion, and the third electrode lead-out portion has a second end portion in the third direction, and in a projection plane perpendicular to the first direction, a projection of the second end portion is misaligned with a projection of the first electrode lead-out portion. The first battery monomer further comprises a shell, a first internal connecting member and a second internal connecting member, the first internal connecting member is located in the shell and connected to the first end portion, and the second internal connecting member is located in the shell and connected to the second end portion.

20. The battery of claim 19, wherein, The first end portion protrudes towards the third electrode lead-out portion along the first direction, and / or the second end portion protrudes towards the first electrode lead-out portion along the first direction.

21. The battery of any one of claims 1-20, wherein, The battery monomer further comprises a shell and an electrode assembly, the shell has a containing space, the shell comprises a first shell wall, and at least part of the electrode assembly is arranged in the containing space. In a thickness direction of the first shell wall, the electrode lead-out portion is arranged between the third electrode lead-out portion and the first shell wall, and the first electrode lead-out portion and the third electrode lead-out portion abut.

22. The battery of claim 21, wherein, The third electrode lead-out portion comprises an electrode terminal and a first insulating member, the electrode terminal is fixed with the first insulating member, the first electrode lead-out portion is at least partially arranged between the first insulating member and the first shell wall, and the first insulating member abuts the first electrode lead-out portion.

23. The battery of claim 22, wherein, The battery monomer further comprises a second insulating member, and the second insulating member is at least partially arranged between the first electrode lead-out portion and the first shell wall.

24. The battery of claim 23, wherein, The first insulating member and the second insulating member are integrally formed.

25. The battery of any one of claims 22-24, wherein, The first electrode lead-out portion comprises a first terminal plate, at least part of the first terminal plate is arranged on a side of the first shell wall away from the containing space, the electrode terminal comprises a second terminal plate, the second terminal plate is arranged on a side of the first shell wall away from the containing space, and the first insulating member is fixed to the first terminal plate. In a thickness direction of the first shell wall, the first terminal plate, the first insulating member and the second terminal plate partially overlap, the second terminal plate is at least partially arranged between the first insulating member and the first shell wall, and the first terminal plate abuts the first insulating member.

26. The battery of claim 25, wherein, The first electrode lead-out portion further includes a first terminal plate, at least a portion of the first terminal plate being disposed on a side of the first housing wall facing the accommodation space, and the electrode terminal further includes a second terminal plate, at least a portion of the second terminal plate being disposed on a side of the first housing wall facing the accommodation space. In a wall thickness direction of the first housing wall, the first terminal plate is at least partially disposed between the second terminal plate and the first housing wall; or In a wall thickness direction of the first housing wall, the second terminal plate is at least partially disposed between the first terminal plate and the first housing wall.

27. The battery of claim 25 or 26, wherein, The third electrode lead-out portion is provided with a first protruding portion, the first electrode lead-out portion is provided with a first recessed portion, the first protruding portion and the first recessed portion at least partially overlap in a wall thickness direction of the first housing wall, and the first protruding portion and the first recessed portion are matched with each other.

28. The battery of claim 27, wherein, The first recessed portion includes a first stepped portion and a second stepped portion, the second stepped portion being disposed on a side of the first stepped portion away from the third electrode lead-out portion. The first protruding portion includes a first extending portion provided by the electrode terminal, in a wall thickness direction of the first housing wall, a portion of the first electrode lead-out portion is located between the first extending portion and the first housing wall, and the first extending portion is at least partially accommodated in a stepped space formed by the first stepped portion. The first protruding portion further includes a first covering portion provided by the first insulating member, in a wall thickness direction of the first housing wall, a portion of the first electrode lead-out portion is located between the first covering portion and the first housing wall, and the first covering portion is at least partially accommodated in a stepped space formed by the second stepped portion.

29. The battery of any one of claims 25-28, wherein, In a wall thickness direction of the first housing wall, a height difference between a surface of a side of the first terminal plate away from the housing wall and a surface of a side of the second terminal plate away from the first housing wall is greater than or equal to 0 and does not exceed 0.5 mm.

30. The battery of any one of claims 27-29, wherein, The first terminal plate includes a first main body portion and a first extending portion connected to each other, the second terminal plate includes a second main body portion and a second extending portion connected to each other, in a length direction of the first housing wall, the first extending portion and the second extending portion are located between the first main body portion and the second main body portion, and the first extending portion and the second extending portion are arranged in a width direction of the first housing wall.

31. The battery of claim 30, wherein, The first electrode lead-out portion further includes a first terminal plate, the first terminal plate being disposed on a side of the first housing wall facing the accommodation space, and the electrode terminal further includes a second terminal plate, at least a portion of the second terminal plate being disposed on a side of the first housing wall facing the accommodation space, the first main body portion and the first terminal plate being directly connected through a first connecting column; The second main body portion and the second terminal plate are directly connected through a second connecting column.

32. The battery of claim 30 or 31, wherein, The first recessed portion is disposed on a side of the first extending portion facing the electrode terminal, and the first protruding portion is disposed on a side of the second main body portion facing the first electrode lead-out portion.

33. The battery of any one of claims 30-32, wherein, The electrode terminal is further provided with a second recess, a portion of the first electrode lead-out part forms at least part of a second protrusion, the second protrusion at least partially overlaps the second recess in the wall thickness direction of the first shell wall, and the second protrusion and the second recess cooperate with each other; The second recess is arranged on the side of the second extension part facing the first electrode lead-out part, and the second protrusion is arranged on the side of the first main body part facing the electrode terminal.

34. The battery of claim 33, wherein, The second recess includes a third step part and a fourth step part, and the fourth step part is arranged on the side of the third step part away from the first electrode lead-out part; The second protrusion includes a second extension part provided by the first electrode lead-out part, and a portion of the electrode terminal is located between the second extension part and the first shell wall in the wall thickness direction of the first shell wall, and the second extension part is at least partially accommodated in the step space formed by the third step part; The battery monomer further includes a second insulating part, the second insulating part is at least partially located between the first electrode lead-out part and the first shell wall, the second protrusion further includes a second covering part provided by the second insulating part, and a portion of the electrode terminal is located between the second covering part and the first shell wall in the wall thickness direction of the first shell wall, and the second covering part is at least partially accommodated in the step space formed by the fourth step part.

35. The battery of any one of claims 31-34, wherein, The second extension part is connected to the second terminal disc through a third connecting column, the first recess is arranged on the side of the first extension part facing the electrode terminal, and the first protrusion is arranged on the side of the second extension part facing the first electrode lead-out part.

36. The battery of any one of claims 1-35, wherein, The current collecting part is connected to the electrode lead-out part in a second direction, and a third direction is perpendicular to the first direction and the second direction; The electrode lead-out part is located on a first wall surface of the battery monomer, the first wall surface includes a first boundary and a second boundary opposite in the third direction, and the minimum distance between the electrode lead-out part and the first boundary is less than the minimum distance between the electrode lead-out part and the second boundary.

37. The battery of any one of claims 1-36, wherein, The current collecting part is connected to the electrode lead-out part in a second direction, and a third direction is perpendicular to the first direction and the second direction; All the electrode lead-out parts on the same battery monomer are located on the same wall surface, and the distance between the two farthest points of the two adjacent electrode lead-out parts in the third direction on the same battery monomer is less than or equal to half of the maximum size of the wall surface in the third direction.

38. The battery of claim 37, wherein, The battery further includes a sampling assembly electrically connected to the battery monomer, and the sampling assembly is located on the same side of all the electrode lead-out parts in the third direction.

39. The battery of claim 38, wherein, The sampling assembly and the electrode lead-out part are located on a first wall surface of the battery monomer.

40. The battery of claim 39, wherein, The first wall surface comprises a first boundary and a second boundary opposite along the third direction, a minimum distance between the electrode lead-out portion and the first boundary is smaller than a minimum distance between the electrode lead-out portion and the second boundary, and the sampling assembly is at least partially located between the electrode lead-out portion and the second boundary.

41. The battery of any one of claims 3-40, wherein, The battery further comprises a sampling assembly, and the busbar is connected to the first electrode lead-out portion and the second electrode lead-out portion along a second direction, and a third direction is perpendicular to the first direction and the second direction. The first electrode lead-out portion comprises a first connecting portion and a second connecting portion in different positions, the first connecting portion is connected to the busbar, and the second connecting portion is connected to the sampling assembly, and a minimum dimension of the first connecting portion along the third direction is greater than a minimum dimension of the second connecting portion along the third direction.

42. The battery of claim 41, wherein, The second connecting portion is located at one end of the first electrode lead-out portion close to the sampling assembly along the third direction for connecting the sampling assembly, and the first connecting portion is located at the other end of the first electrode lead-out portion.

43. The battery of any one of claims 1-42, wherein, Busbars located adjacent along the first direction on the same battery monomer group are projected to coincide along the first direction.

44. The battery of any one of claims 1-43, wherein, The battery comprises a box body comprising a containing cavity and a first box wall for closing the containing cavity, and an inner surface of the first box wall is at least partially protruded to an outer surface to form a recess on the inner surface, The recess contains at least part of the electrode lead-out portion, and / or the recess contains at least part of the busbar.

45. An electrical device, comprising: The battery as claimed in any one of claims 1-44 is used to provide electric energy for the electric device.

46. A vehicle, wherein, The vehicle comprises a vehicle frame and the battery as claimed in any one of claims 44, the battery is arranged on the vehicle frame, an outer surface of the first box wall forms a convex portion corresponding to a region of the recess along a wall thickness direction, and the convex portion faces the vehicle frame.

47. The vehicle of claim 46, wherein, The vehicle frame has a support beam with a slot, and the convex portion at least partially extends into the slot.

48. A battery cell, wherein, The battery monomer is used in a battery, the battery monomer is configured as a plurality in the battery and arranged along a first direction, and the battery further comprises a busbar, The battery monomer comprises a plurality of electrode lead-out portions, and the battery monomer is configured to connect the busbar to the electrode lead-out portions of the battery monomers arranged adjacent along the first direction; In a projection plane perpendicular to the first direction, projections of at least two electrode lead-out portions located on the battery monomer at least partially coincide.

49. The battery cell of claim 48, wherein, The battery monomer comprises a first electrode lead-out portion comprising a first connecting portion for connecting the busbar, and the battery monomer further comprises a first edge and a second edge opposite along the first direction, and a maximum distance between the first connecting portion and the first edge is smaller than a maximum distance between the first connecting portion and the second edge.

50. The battery cell of claim 49, wherein, The battery cell further includes a third electrode lead-out portion, in a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially coincident in projection along the first direction, the first electrode lead-out portion and the third electrode lead-out portion are asymmetric structures about the center of the wall surface.

51. The battery cell of claim 50, wherein, In a projection plane perpendicular to the first direction, the first electrode lead-out portion and the third electrode lead-out portion are at least partially misaligned in projection along the first direction.

52. The battery cell of claim 51, wherein, The busbar is used to be connected to the first electrode lead-out portion along the second direction, the third direction is perpendicular to the first direction and the second direction two by two; The first electrode lead-out portion has a first end portion in the third direction, in a projection plane perpendicular to the first direction, the projection of the first end portion is misaligned with the projection of the third electrode lead-out portion, the third electrode lead-out portion has a second end portion in the third direction, in a projection plane perpendicular to the first direction, the projection of the second end portion is misaligned with the projection of the first electrode lead-out portion; The battery cell further includes a housing, a first internal connecting member and a second internal connecting member, the first internal connecting member is located in the housing and connected to the first end portion, and the second internal connecting member is located in the housing and connected to the second end portion.

53. The battery cell of claim 52, wherein, The first end portion protrudes towards the third electrode lead-out portion along the first direction, and / or the second end portion protrudes towards the first electrode lead-out portion along the first direction.

54. The battery cell of any one of claims 48-53, wherein, The battery cell further includes a housing and an electrode assembly, the housing has a containing space, the housing includes a first housing wall, and at least part of the electrode assembly is arranged in the containing space; In the direction of the wall thickness of the first housing wall, the electrode lead-out portion is arranged on the first housing wall, the electrode lead-out portion includes a first electrode lead-out portion and a third electrode lead-out portion, at least part of the first electrode lead-out portion is arranged between the third electrode lead-out portion and the first housing wall, and the first electrode lead-out portion and the third electrode lead-out portion are in abutment.

55. The battery cell of claim 54, wherein, The third electrode lead-out portion includes an electrode terminal and a first insulating member, the electrode terminal is fixed with the first insulating member, the first electrode lead-out portion is at least partially arranged between the first insulating member and the first housing wall, and the first insulating member is in abutment with the first electrode lead-out portion.

56. The battery cell of claim 55, wherein, The battery cell further includes a second insulating member, the second insulating member is at least partially located between the first electrode lead-out portion and the first housing wall.

57. The battery cell of claim 56, wherein, The first insulating member and the second insulating member are integrally formed.

58. The battery cell of any one of claims 55-57, wherein, The first electrode lead-out portion includes a first terminal plate, at least part of the first terminal plate is arranged on the side of the first housing wall away from the containing space, the electrode terminal includes a second terminal plate, the second terminal plate is arranged on the side of the first housing wall away from the containing space, and the first insulating member is fixed to the first terminal plate; The first terminal plate, the first insulating member, and the second terminal plate partially overlap in a wall thickness direction of the first housing wall, and the second terminal plate is partially disposed between the first insulating member and the first housing wall, and the first terminal plate abuts against the first insulating member.

59. The battery cell of claim 58, wherein, The first electrode lead-out portion further includes a first terminal disc, at least a portion of the first terminal disc being disposed on a side of the first housing wall facing the accommodation space, and the electrode terminal further includes a second terminal disc, the second terminal disc being disposed on a side of the first housing wall facing the accommodation space, In a wall thickness direction of the first housing wall, the first terminal disc is at least partially disposed between the second terminal disc and the first housing wall; or, In a wall thickness direction of the first housing wall, the second terminal disc is at least partially disposed between the first terminal disc and the first housing wall.

60. The battery cell of claim 58 or 59, wherein, The third electrode lead-out portion is provided with a first protruding portion, the first electrode lead-out portion is provided with a first recessed portion, the first protruding portion and the first recessed portion at least partially overlap in a wall thickness direction of the first housing wall, and the first protruding portion and the first recessed portion are matched with each other.

61. The battery cell of claim 60, wherein, The first recessed portion includes a first stepped portion and a second stepped portion, the second stepped portion being disposed on a side of the first stepped portion away from the third electrode lead-out portion; The first protruding portion includes a first extending portion provided by the electrode terminal, in a wall thickness direction of the first housing wall, a portion of the first electrode lead-out portion is located between the first extending portion and the first housing wall, and the first extending portion is at least partially accommodated in a stepped space formed by the first stepped portion; The first protruding portion further includes a first covering portion provided by the first insulating member, in a wall thickness direction of the first housing wall, a portion of the first electrode lead-out portion is located between the first covering portion and the first housing wall, and the first covering portion is at least partially accommodated in a stepped space formed by the second stepped portion.

62. The battery cell of any one of claims 58-61, wherein, In a wall thickness direction of the first housing wall, a height difference between a surface of a side of the first terminal plate away from the housing wall and a surface of a side of the second terminal plate away from the first housing wall is greater than or equal to 0 and does not exceed 0.5 mm.

63. The battery cell of any one of claims 60-62, wherein, The first terminal plate includes a first main body portion and a first extending portion connected to each other, the second terminal plate includes a second main body portion and a second extending portion connected to each other, in a length direction of the first housing wall, the first extending portion and the second extending portion are located between the first main body portion and the second main body portion, and the first extending portion and the second extending portion are arranged in a width direction of the first housing wall.

64. The battery cell of claim 63, wherein, The first electrode lead-out portion further includes a first terminal disc, at least a portion of the first terminal disc being disposed on a side of the first housing wall facing the accommodation space, and the electrode terminal further includes a second terminal disc, the second terminal disc being disposed on a side of the first housing wall facing the accommodation space, the first main body portion and the first terminal disc being directly connected through a first connecting column; The second main body part and the second terminal plate are directly connected by a second connecting column.

65. The battery cell of claim 64, wherein, The first recess part is arranged on a side of the first extension part facing the electrode terminal, and the first protrusion part is arranged on a side of the second main body part facing the first electrode lead-out part.

66. The battery cell of claim 65, wherein, The electrode terminal is further provided with a second recess part, a portion of the first electrode lead-out part forms at least part of a second protrusion part, the second protrusion part at least partially overlaps the second recess part in a wall thickness direction of the first shell wall, and the second protrusion part and the second recess part are mutually matched; The second recess part is arranged on a side of the second extension part facing the first electrode lead-out part, and the second protrusion part is arranged on a side of the first main body part facing the electrode terminal.

67. The battery cell of claim 66, wherein, The second recess part comprises a third step part and a fourth step part, and the fourth step part is arranged on a side of the third step part away from the first electrode lead-out part; The second protrusion part comprises a second protruding part provided by the second electrode cell terminal, and in the wall thickness direction of the first shell wall, a portion of the electrode terminal is located between the second protruding part and the first shell wall, and the second protruding part is at least partially accommodated in a step space formed by the third step part; The battery cell further comprises a second insulating member, the second insulating member is at least partially located between the first electrode lead-out part and the first shell wall, the second protrusion part further comprises a second covering part provided by the second insulating member, in the wall thickness direction of the first shell wall, a portion of the electrode terminal is located between the second covering part and the first shell wall, and the second covering part is at least partially accommodated in a step space formed by the fourth step part.

68. The battery cell of any one of claims 64-67, wherein, The second extension part is connected with the second terminal plate by a third connecting column, the first recess part is arranged on a side of the first extension part facing the electrode terminal, and the first protrusion part is arranged on a side of the second extension part facing the first electrode lead-out part.

69. The battery cell of any one of claims 48-68, wherein, The current collecting member is connected with the electrode lead-out part in a second direction, and a third direction is perpendicular to the first direction and the second direction. The electrode lead-out part is located on a first wall surface of the battery cell, the first wall surface comprises a first boundary and a second boundary opposite to each other in the third direction, and the minimum distance between the electrode lead-out part and the first boundary is smaller than the minimum distance between the electrode lead-out part and the second boundary.

70. The battery cell of any one of claims 48-69, wherein, The current collecting member is connected with the electrode lead-out part in a second direction, and a third direction is perpendicular to the first direction and the second direction. All the electrode lead-out parts on the same battery cell are located on the same wall surface, and the distance between the two farthest points of the two adjacent electrode lead-out parts on the same battery cell in the third direction is less than or equal to half of the maximum size of the wall surface in the third direction.

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