Battery and electric device

Abstract

A battery and an electric device. The battery (100) comprises: a case (10), comprising a first beam (13); battery cell groups (30), including first battery cell groups (31) and second battery cell groups (32) that are arranged adjacent to each other in a first direction, wherein each battery cell group among the first battery cell groups and the second battery cell groups comprises multiple battery cells (20) that are stacked in a second direction, each first battery cell group comprises a first surface (311), each second battery cell group comprises a second surface (321), and the first surface and the second surface are adjacent to each other in the first direction and are both perpendicular to a third direction; and crimping members (40), wherein each crimping member is arranged at the abutment between a corresponding first surface and a corresponding second surface so as to be connected to both the first surface and the second surface. The first beam is located at one end of the first battery cell groups and the second battery cell groups in the second direction, and the crimping members extend in the second direction and are arranged spaced from the first beam. The battery further comprises first electrical connectors (50), wherein each first electrical connector is used for electrically connecting a corresponding first battery cell group and a corresponding second battery cell group, and at least a portion of each first electrical connector is located at a gap between a corresponding crimping member and the first beam.

Description

Battery and electric device

[0001] Cross-reference to related applications

[0002] This application is based on the Chinese Patent Application No. 202420685601.X entitled "Battery and electric device" filed on April 03, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a battery and an electric device. BACKGROUND

[0004] At present, in order to simplify the structure of the battery pack, a module-free battery pack appears, wherein, due to the module-free battery pack canceling the module end plate, side plate and other structures, when the battery monomer expands, only the box beam is used to limit and support the battery monomer, which is easy to cause the failure of the box.

[0005] SUMMARY

[0006] In view of the problem, the present application provides a battery and an electric device, which can alleviate the problem that when the battery monomer expands, only the box beam is used to limit and support the battery monomer, which is easy to cause the failure of the box.

[0007] In a first aspect, the present application provides a battery, comprising:

[0008] a box comprising a first beam;

[0009] a battery monomer group comprising a first battery monomer group and a second battery monomer group arranged adjacent along a first direction, the first battery monomer group and the second battery monomer group each comprising a plurality of battery monomers stacked along a second direction, the first battery monomer group comprising a first surface and the second battery monomer group comprising a second surface, the first surface and the second surface being adjacent along the first direction and each being perpendicular to a third direction, the first direction, the second direction and the third direction being perpendicular to each other in pairs; and

[0010] a pressure connecting piece arranged at the abutting position of the first surface and the second surface to be connected to the first surface and the second surface at the same time;

[0011] wherein the first beam is located at one end of the first battery monomer group and the second battery monomer group along the second direction, the pressure connecting piece extends along the second direction and is arranged spaced apart from the first beam, the battery further comprises a first electric connecting piece for electrically connecting the first battery monomer group and the second battery monomer group, at least part of the first electric connecting piece is located at the spacing position between the pressure connecting piece and the first beam.

[0012] By setting at least part of the first electrical connecting member to be located at the interval between the crimping member and the first beam, the crimping member can be avoided from the first electrical connecting member, and the crimping member is not interfered by the position of the first electrical connecting member. By setting the crimping member to be connected to the first surface of the adjacent first battery monomer group and the second surface of the second battery monomer group, the connection of each battery monomer of the adjacent two battery monomer groups can be realized, and each battery monomer can be fixed and limited. When the battery monomer expands and presses the box, the deformation of the box is reduced due to the restraint of the crimping member, the requirement for the strength of the beam structure of the box is reduced, and the risk of failure of the box is also reduced.

[0013] In some embodiments, the battery monomer group further comprises a third battery monomer group and a fourth battery monomer group, and the battery further comprises a partition, the third battery monomer group and the first battery monomer group are oppositely arranged on two sides of the partition along the second direction, the fourth battery monomer group and the second battery monomer group are oppositely arranged on two sides of the partition along the second direction, the third battery monomer group comprises a third surface, the fourth battery monomer group comprises a fourth surface, the third surface and the fourth surface are adjacent along the first direction and are perpendicular to the third direction, and the crimping member extends along the second direction and across the partition to be connected to the third surface and the fourth surface.

[0014] Since the crimping member can cross the partition, the extension of the crimping member is not interfered by the position of the partition, the crimping member can simultaneously press and connect four battery monomer groups adjacent to each other, and the crimping efficiency is improved.

[0015] In some embodiments, the box further comprises a bearing member for bearing the battery monomer group, and the partition comprises a first wall surface away from the bearing member along the third direction, and the minimum distance between the third surface and / or the fourth surface and the bearing member is greater than or equal to the minimum distance between the first wall surface and the bearing member.

[0016] In this way, the third surface and / or the fourth surface can be higher than or equal to the first wall surface of the partition. When the crimping member extends along the second direction and across the partition, the crimping member is bent and directly crosses above the partition in a straight line, and thus the overall structure of the crimping member is simplified.

[0017] In some embodiments, the partition comprises an avoidance slot with an opening facing the third direction, and at least part of the crimping member is located in the avoidance slot.

[0018] When the crimping member extends along the second direction and across the partition, since the crimping member is provided with the avoidance slot, the crimping member can directly cross in a straight line by being partially located in the avoidance slot, and thus the overall structure of the crimping member is also simplified.

[0019] In some embodiments, the battery cell group further includes a third battery cell group and a fourth battery cell group, and the housing further includes a second beam and a third beam. The third battery cell group and the first battery cell group are disposed opposite to each other on both sides of the second beam along a second direction, and the fourth battery cell group and the second battery cell group are disposed opposite to each other on both sides of the second beam along a second direction. The third beam is located on the side of the third battery cell group and the fourth battery cell group away from the second beam along the second direction.

[0020] By setting a second beam between the third battery cell group and the first battery cell group, and between the fourth battery cell group and the second battery cell group, the structural strength of the housing can be improved when there are a large number of battery cells, thereby improving the anti-expansion effect of the housing.

[0021] In some embodiments, the third battery cell group includes a third surface, and the fourth battery cell group includes a fourth surface. The third surface and the fourth surface are adjacent to each other along a first direction and are both perpendicular to the third direction. The battery also includes a locking press-fit member disposed at the adjacent point of the third surface and the fourth surface to connect to both the third surface and the fourth surface simultaneously. The two ends of the locking press-fit member are respectively connected to the second beam and the third beam.

[0022] Since it is no longer affected by the first electrical connection, the locking and pressing member does not need to avoid it. Thus, the two ends of the locking and pressing member can be connected to the second beam and the third beam respectively, without forming a gap between them and the third beam. When the battery cells of the third and fourth battery cell groups expand and put pressure on the second and third beams of the box, the deformation of the second and third beams is reduced due to the restraint of the locking and pressing member. This reduces the requirements for the structural strength of the box beams and also reduces the risk of box failure.

[0023] In some embodiments, the locking crimping member includes a metal connector and an insulating connector, the metal connector being connected to the second beam and the third beam, a portion of the insulating connector being located between the third surface and the metal connector, and a portion of the insulating connector being located between the fourth surface and the metal connector.

[0024] Because metal connectors offer better structural strength, their connection to the second and third beams enhances the overall structural strength of the enclosure, thereby improving its resistance to expansion. Furthermore, by placing insulating connectors between the third surface of the third battery cell assembly and the metal connector, and between the fourth surface of the fourth battery cell assembly and the metal connector, insulation between the metal connectors and the battery cells is achieved, thus improving battery reliability.

[0025] In some embodiments, the insulating connector is bonded to the third and fourth surfaces.

[0026] By setting the insulating connecting piece to be bonded to the third surface and the fourth surface, the contact between the locking and crimping piece and the third and fourth battery monomer groups can be made more closely, thereby fixing and limiting each battery monomer, and improving the crimping reliability.

[0027] In some embodiments, the metal connecting piece is bonded to the insulating connecting piece.

[0028] By bonding, the connection between the metal connecting piece and the insulating connecting piece can be made more closely, thereby improving the insulation reliability.

[0029] In some embodiments, the insulating connecting piece covers at least part of the metal connecting piece.

[0030] By setting the insulating connecting piece to cover at least part of the metal connecting piece, the positional reliability between the insulating connecting piece and the metal connecting piece can be improved, thereby improving the insulation effect between the metal connecting piece and the battery monomer.

[0031] In some embodiments, the crimping piece is bonded to the first surface and the second surface.

[0032] Since the crimping piece is bonded to the first surface and the second surface, the bonding operation is simple and reliable, and is also conducive to the fixation and limitation between the battery monomers.

[0033] In some embodiments, the first battery monomer group includes a first battery monomer directly connected to the first electrical connecting piece, the second battery monomer group includes a second battery monomer directly connected to the first electrical connecting piece, and the crimping piece is completely misaligned with the first battery monomer and / or the second battery monomer in the third direction.

[0034] The crimping piece is not located above the first battery monomer and / or the second battery monomer in the third direction, thereby providing sufficient spacing space between the crimping piece and the first beam for the first electrical connecting piece, and making the first battery monomer and / or the second battery monomer have a larger contact area with the first electrical connecting piece, thereby improving the electrical connection reliability.

[0035] In some embodiments, the crimping piece is made of epoxy glass fiber composite material.

[0036] The crimping piece made of epoxy glass fiber composite material has insulation, can maintain insulation between the battery monomers, improves the reliability of the battery, and the crimping piece made of epoxy glass fiber composite material has high strength and high toughness, thereby improving the crimping effect.

[0037] In a second aspect, a power consuming device is provided, which includes the battery in any of the above embodiments, and the battery is used to provide electrical energy.

[0038] By setting at least part of the first electrical connecting member at a spacing between the crimping member and the first beam, the crimping member can be avoided from the first electrical connecting member, and the crimping member is not interfered by the position of the first electrical connecting member. By setting the crimping member to be connected to the first surface of the adjacent first battery monomer group and the second surface of the second battery monomer group, the connection of each battery monomer of the adjacent two battery monomer groups can be realized, and each battery monomer can be fixed and limited. When the battery monomer expands and presses the box, the deformation of the box is reduced due to the restraint of the crimping member, the requirement for the strength of the beam structure of the box is reduced, and the risk of failure of the box is also reduced.

[0039] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the drawings. In the drawings:

[0041] Fig. 1 is a structural schematic diagram of a vehicle according to one or more embodiments.

[0042] Fig. 2 is an exploded structural schematic diagram of a battery according to one or more embodiments.

[0043] Fig. 3 is an exploded structural schematic diagram of a battery monomer according to one or more embodiments.

[0044] Fig. 4 is a structural schematic diagram of a battery according to one or more embodiments.

[0045] Fig. 5 is a top view structural schematic diagram of the battery shown in Fig. 4.

[0046] Fig. 6 is an A-A cross-sectional structural schematic diagram of the battery shown in Fig. 5.

[0047] Fig. 7 is a partial enlarged schematic diagram of A in the battery shown in Fig. 6.

[0048] Fig. 8 is a partial enlarged schematic diagram of B in the battery shown in Fig. 6.

[0049] The reference signs in the detailed description are as follows: vehicle 1000, battery 100, box body 10, first part 11, second part 12, first beam 13, second beam 15, third beam 16, battery monomer 20, end cover 21, electrode terminal 211, shell 22, battery core assembly 23, battery monomer group 30, first battery monomer group 31, first surface 311, second battery monomer group 32, second surface 321, third battery monomer group 33, third surface 331, fourth battery monomer group 34, fourth surface 341, pressure joint 40, first pressure joint 41, second pressure joint 42, first electrical connection part 50, locking pressure joint 60, metal connecting piece 61, insulating connecting piece 62, controller 200, motor 300. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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 indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0052] Reference herein to "embodiments" means that the specific features, structures or properties described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of the present application, 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, 1 and / or 2, which can mean: 1 alone, 1 and 2 together, and 2 alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or 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 application can be understood according to the specific circumstances.

[0057] At present, in order to simplify the battery PACK structure, improve the space utilization, and at the same time simplify the installation process and save production cost, a widely used CTP technology is constantly innovating and developing. CTP, that is, Cell To PACK (battery-battery pack), is to integrate the battery directly into the battery pack, thereby eliminating the intermediate module architecture, simplifying the PACK structure, and improving the space utilization.

[0058] However, with the removal of the module architecture, some limiting structures of the battery monomer are also cancelled. When the battery monomer expands, only the battery monomer is limited and supported by the box beam, which is easy to cause the box to fail.

[0059] Under normal circumstances, a plurality of battery monomers will be arranged in groups and then arranged side by side in the battery box. In order to improve the structural strength of the box beam and reduce the risk of box failure, a steel pressing strip will be arranged above the battery monomer group. The steel pressing strip can be crimped on the end cover of the battery monomer, and the two ends of the steel pressing strip will also be locked on the box beam for connection. In this way, when the battery monomer expands and exerts pressure on the two ends of the box beam, the deformation of the box beam is reduced due to the restraint of the steel pressing strip, the requirement for the structural strength of the box beam is reduced, and the risk of box failure is reduced.

[0060] However, since adjacent battery monomer groups need to be connected in series or parallel, gaskets are used to connect the end portions of adjacent battery monomer groups. At this time, if the steel pressing strip is connected to the box beam across the gasket, the steel pressing strip will be lifted, causing the gap between the steel pressing strip and the battery monomer to increase, and the steel pressing strip cannot be pressed on the end cover of the battery monomer. If the steel pressing strip does not cross the gasket, the two ends of the steel pressing strip cannot be locked on the box beam at the same time for connection.

[0061] In some embodiments, in order to alleviate the problem that the steel pressing strip is not convenient to arrange due to the gasket connection, so that the deformation of the box beam cannot be effectively reduced, the requirement for the structural strength of the box beam is reduced, and the risk of box failure is reduced, the application designs a battery, which includes a box, a battery monomer group, and a pressing piece. The box includes a first beam, the battery monomer group includes a first battery monomer group and a second battery monomer group arranged adjacent to each other along a first direction, and the first battery monomer group and the second battery monomer group each include a plurality of battery monomers stacked along a second direction. The first battery monomer group includes a first surface, and the second battery monomer group includes a second surface. The first surface and the second surface are adjacent to each other along the first direction and are perpendicular to a third direction. The first direction, the second direction, and the third direction are perpendicular to each other in pairs. The pressing piece is arranged at the abutting portion of the first surface and the second surface to be connected to the first surface and the second surface at the same time. The first beam is located at one end of the first battery monomer group and the second battery monomer group along the second direction, and the pressing piece extends along the second direction and is arranged spaced apart from the first beam. The battery further includes a first electrical connection piece for electrically connecting the first battery monomer group and the second battery monomer group. At least part of the first electrical connection piece is located at the spacing between the pressing piece and the first beam.

[0062] In this way, by arranging at least part of the first electrical connection piece to be located at the spacing between the pressing piece and the first beam, the pressing piece can avoid the first electrical connection piece and be free from the position interference of the first electrical connection piece. By arranging the pressing piece to be connected to the first surface of the adjacent first battery monomer group and the second surface of the second battery monomer group at the same time, the connection of each battery monomer of the adjacent two battery monomer groups can be achieved. When the battery monomers expand and press the box, the deformation of the box is reduced due to the restraint of the pressing piece, the requirement for the structural strength of the box beam is reduced, and the risk of box failure is also reduced.

[0063] The battery of the application is applied to an electric device to alleviate the problem that the steel pressing strip is not convenient to arrange due to the gasket connection, so that the deformation of the box beam cannot be effectively reduced, the requirement for the structural strength of the box beam is reduced, and the risk of box failure is reduced.

[0064] The battery disclosed in the embodiments of the application can be used in, but is not limited to, an electric device such as a vehicle, a ship, or an aircraft.

[0065] The following embodiments are described by taking a vehicle 1000 as an example for convenience of illustration.

[0066] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery 100, which 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 power demand of the vehicle 1000 during starting, navigation, and driving.

[0067] In some embodiments of the present application, 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, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Referring to FIG. 2, FIG. 2 is an exploded view of the battery 100 according to some embodiments of the present application. The battery 100 includes a box body 10 and a battery monomer 20, and the battery monomer 20 is contained in the box body 10. The box body 10 is used to provide a containing space for the battery monomer 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12, and the first part 11 and the second part 12 are mutually covered to jointly define a containing space for containing the battery monomer 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-shaped structure, which is covered on the open side of the second part 12 to jointly define the containing space with the second part 12. Alternatively, the first part 11 and the second part 12 can both be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery 100, the battery monomer 20 can be multiple, and the multiple battery monomers 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery monomers 20 are connected in series and in parallel. The multiple battery monomers 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the multiple battery monomers 20 is contained in the box body 10.

[0070] Each battery cell 20 can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0071] Referring to FIG. 3, FIG. 3 is an exploded structural schematic diagram of the battery cell 20 according to some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. As shown in FIG. 3, the battery cell 20 includes an end cover 21, a shell 22, a cell assembly 23, and other functional components.

[0072] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. In some embodiments, the end cover 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 21 is not easily deformed when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cover 21 can be provided with functional components such as an electrode terminal 211. The electrode terminal 211 can be used to electrically connect with the cell assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating piece can be plastic, rubber, etc.

[0073] The shell 22 is a component used to fit the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the cell assembly 23, the electrolyte, and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, and in some embodiments, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the inside of the shell 22, the end cover 21 is covered on the shell 22. The shell 22 can be various shapes and various sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. In some embodiments, the shape of the shell 22 can be determined according to the specific shape and size of the cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0074] The cell assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more cell assemblies 23 can be contained within the case 22. The cell assembly 23 is mainly composed of positive and negative electrode materials, a separator, and a current collector 231. In some embodiments, the positive electrode material is coated on a battery output pole connector to form a positive electrode tab, the negative electrode material is coated on a battery output pole connector to form a negative electrode tab, the positive electrode tab and the negative electrode tab are wound or stacked, and the separator is disposed between the positive electrode tab and the negative electrode tab, thereby forming the cell assembly 23. The positive electrode tab and the negative electrode tab each have a portion with active material constituting a main body of the cell assembly, and a portion without active material constituting a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at two ends of the main body, respectively. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

[0075] FIG. 4 is a structural schematic diagram of a battery according to one or more embodiments, and FIG. 5 is a top structural schematic diagram of the battery shown in FIG. 4. Referring to FIGS. 4 and 5, the embodiments of the present application provide a battery 100, which includes a box body 10, a battery cell group 30, and a press-fit member 40. The box body 10 includes a first beam 13, the battery cell group 30 includes a first battery cell group 31 and a second battery cell group 32 arranged adjacent to each other along a first direction, and the first battery cell group 31 and the second battery cell group 32 each include a plurality of battery cells 20 stacked along a second direction. The first battery cell group 31 includes a first surface 311, the second battery cell group 32 includes a second surface 321, the first surface 311 and the second surface 321 are adjacent to each other along the first direction and are each perpendicular to a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other two by two. The press-fit member 40 is disposed at the abutting position of the first surface 311 and the second surface 321 to be connected to the first surface 311 and the second surface 321 at the same time. The first beam 13 is located at one end of the first battery cell group 31 and the second battery cell group 32 along the second direction, and the press-fit member 40 extends along the second direction and is disposed spaced apart from the first beam 13. The battery 100 further includes a first electrical connection member 50 for electrically connecting the first battery cell group 31 and the second battery cell group 32, and at least a portion of the first electrical connection member 50 is located at the space between the press-fit member 40 and the first beam 13.

[0076] In some embodiments, the first direction is the Y direction shown in FIG. 4, the second direction is the X direction shown in FIG. 4, and the third direction is the Z direction shown in FIG. 4.

[0077] The first surface 311 of the first battery cell group 31 can be an upper surface of the first battery cell group 31 along the third direction, and the first surface 311 can be formed by combining the upper surfaces of each battery cell 20 of the first battery cell group 31 along the third direction. The upper surface of the battery cell 20 along the third direction can be the top surface of the end cover 21 of the battery cell 20. Similarly, the second surface 321 of the second battery cell group 32 can be an upper surface of the second battery cell group 32 along the third direction, and the second surface 321 can be formed by combining the upper surfaces of each battery cell 20 of the second battery cell group 32 along the third direction.

[0078] The crimping member 40 refers to a structure that can provide a pressing force to an object. In this application, the crimping member 40 is arranged at the abutting position of the first surface 311 and the second surface 321 to simultaneously connect to the first surface 311 and the second surface 321, thereby providing a way to press the first battery cell group 31 and the second battery cell group 32 tightly, which can be that the crimping member 40 is pressed along the third direction to the first surface 311 and the second surface 321 and connected to the first surface 311 and the second surface 321.

[0079] The connection of the crimping member 40 to the first surface 311 and the second surface 321 can be a full-surface connection to the first surface 311 and the second surface 321, or a partial-surface connection to the first surface 311 and the second surface 321, for example, the crimping member 40 is only connected to the partial surface of the two ends along the second direction and the partial surface in the middle of the first surface 311 and the second surface 321.

[0080] The first beam 13 belongs to a part of the box 10, which can be used as a side wall of the box 10, or as an intermediate beam inside the box 10.

[0081] The crimping member 40 is arranged spaced apart from the first beam 13 along the second direction, which means that the crimping member 40 is spaced apart from the first beam 13 along the second direction to form a spacing space.

[0082] The first electrical connection member 50 can be a connecting tab, which is used to connect adjacent first battery cell groups 31 and second battery cell groups 32 in series or in parallel. In some embodiments, the first electrical connection member 50 is used to electrically connect one battery cell 20 of the first battery cell group 31 closest to the first beam 13 along the second direction, and one battery cell 20 of the second battery cell group 32 closest to the first beam 13 along the second direction. At least part of the first electrical connection member 50 is located in the spacing space mentioned above.

[0083] In this way, by arranging at least part of the first electrical connecting member 50 to be located at a spacing between the crimping member 40 and the first beam 13, the crimping member 40 can be arranged to avoid the first electrical connecting member 50, so that the crimping member 40 is not interfered by the position of the first electrical connecting member 50. In addition, by arranging the crimping member 40 to be connected to the first surface 311 of the adjacent first battery monomer group 31 and the second surface 321 of the second battery monomer group 32, the crimping member 40 can be arranged to connect the battery monomers 20 of the adjacent two battery monomer groups 30, so that the battery monomers 20 can be fixed and limited, and when the battery monomers 20 expand to press the box body 10, the battery monomers 20 are limited by the crimping member 40, so that the deformation of the box body 10 is reduced, the requirement for the strength of the beam structure of the box body is reduced, and the risk of failure of the box body 10 is reduced.

[0084] In combination with FIGS. 6 and 7, according to some embodiments of the present application, the crimping member 40 is bonded to the first surface 311 and the second surface 321.

[0085] The crimping member 40 can be bonded to the first surface 311 and the second surface 321 by an adhesive or a bonding member. It should be noted that the material of the adhesive and the bonding member should be insulating, and the bonding member can be double-sided tape. In this way, the crimping member 40 can be arranged to be insulated between the adhesive and the battery monomers 20, so as to improve the use reliability of the battery 100.

[0086] Since the crimping member 40 is bonded to the first surface 311 and the second surface 321, the bonding operation is simple and reliable, and is also beneficial to the fixing and limiting of the battery monomers 20.

[0087] According to some embodiments of the present application, the first battery monomer group 31 includes a first battery monomer directly connected to the first electrical connecting member 50, the second battery monomer group 32 includes a second battery monomer directly connected to the first electrical connecting member 50, and the projection of the crimping member 40 along the third direction is completely dislocated from the first battery monomer and / or the second battery monomer.

[0088] The projection of the crimping member 40 along the third direction from the first battery monomer and / or the second battery monomer can refer to the projection along the third direction towards the box body 10.

[0089] The projection of the crimping member 40 along the third direction from the first battery monomer and / or the second battery monomer means that the first projection area formed by the crimping member 40 is staggered without overlapping between the second projection area formed by the first battery monomer and / or the third projection area formed by the second battery monomer.

[0090] That is, the pressure contact member 40 is not located above the first battery cell and / or the second battery cell along the third direction, so that a sufficient spacing space is provided between the pressure contact member 40 and the first beam 13 for the first electrical connection member 50 to be placed, so that the first battery cell and / or the second battery cell has a larger contact area with the first electrical connection member 50, and the reliability of the electrical connection is improved.

[0091] According to some embodiments of the present application, the pressure contact member 40 is made of epoxy glass fiber composite material.

[0092] The pressure contact member 40 made of epoxy glass fiber composite material has insulation, which can keep insulation between the battery cell 20 and improve the reliability of the battery 100. In addition, the pressure contact member 40 made of epoxy glass fiber composite material has high strength and toughness, which improves the pressure contact effect.

[0093] According to some embodiments of the present application, the battery cell group 30 further comprises a third battery cell group 33 and a fourth battery cell group 34, and the battery 100 further comprises a partition member, the third battery cell group 33 and the first battery cell group 31 are oppositely arranged on two sides of the partition member along the second direction, and the fourth battery cell group 34 and the second battery cell group 32 are oppositely arranged on two sides of the partition member along the second direction. The third battery cell group 33 comprises a third surface 331, and the fourth battery cell group 34 comprises a fourth surface 341, the third surface 331 and the fourth surface 341 are adjacent along the first direction and are both perpendicular to the third direction. The pressure contact member 40 extends along the second direction and across the partition member to be connected to the third surface 331 and the fourth surface 341.

[0094] The partition member refers to a component for partitioning at least two objects. In the embodiments of the present application, the partition member can be part of the box 10, for example, the partition member can be some beam structure inside the box 10 to strengthen the structure of the box 10, for example, the second beam 15 described in the following embodiments. It can also be a component with other functions, such as electrical partition, thermal insulation partition used for the operation reliability of the battery 100.

[0095] The third surface 331 of the third battery cell group 33 can be the upper surface of the third battery cell group 33 along the third direction, and the third surface 331 can be formed by combining the upper surface of each battery cell 20 of the third battery cell group 33 along the third direction. The upper surface of the battery cell 20 along the third direction can be the top surface of the end cover 21 of the battery cell 20. Similarly, the fourth surface 341 of the fourth battery cell group 34 can be the upper surface of the fourth battery cell group 34 along the third direction, and the fourth surface 341 can be formed by combining the upper surface of each battery cell 20 of the fourth battery cell group 34 along the third direction.

[0096] The connection mode of the crimping piece 40 to the third surface 331 and the fourth surface 341 is not limited to adhesion, and the connection of the crimping piece 40 to the third surface 331 and the fourth surface 341 can be full-surface connection to the third surface 331 and the fourth surface 341, or partial-surface connection to the third surface 331 and the fourth surface 341, for example, the crimping piece 40 is connected only to the partial surface of the two ends of the third surface 331 and the fourth surface 341 along the second direction and the partial surface in the middle.

[0097] In this embodiment, since the crimping piece 40 can span the partition piece, the extension of the crimping piece 40 is not disturbed by the position of the partition piece, the crimping piece 40 can simultaneously compress and connect four battery cell groups 30 adjacent to each other, and the crimping efficiency is improved.

[0098] Referring to FIG. 6, in some embodiments, the box body 10 further comprises a bearing piece for bearing the battery cell group 30, the partition piece comprises a first wall surface away from the bearing piece along the third direction, and the minimum distance D1 between the third surface 331 and / or the fourth surface 341 and the bearing piece is greater than or equal to the minimum distance D2 between the first wall surface and the bearing piece.

[0099] The first wall surface of the partition piece can be an upper surface of the partition piece along the third direction.

[0100] In this way, the third surface 331 and / or the fourth surface 341 can be higher than or equal to the first wall surface of the partition piece, when the crimping piece 40 extends along the second direction and spans the partition piece, the crimping piece 40 is bent and can directly span above the partition piece in a straight line, and therefore, the overall structure of the crimping piece 40 is simplified.

[0101] In other embodiments, the partition piece can also comprise an avoidance groove with an opening facing the third direction, and at least part of the crimping piece 40 is located in the avoidance groove.

[0102] In some embodiments, the partition piece can be provided with an avoidance groove on the surface on the same side as the third surface 331 and the fourth surface 341 along the third direction.

[0103] When the crimping piece 40 extends along the second direction and spans the partition piece, since the crimping piece 40 is provided with an avoidance groove, the crimping piece 40 can directly span in a straight line by being partially located in the avoidance groove, and therefore, the overall structure of the crimping piece 40 is also simplified.

[0104] It should be noted that the above avoidance groove can be provided when the maximum distance between the third surface 331 and / or the fourth surface 341 and the bearing piece is less than the minimum distance D2 between the first wall surface and the bearing piece.

[0105] Referring to FIG. 5, FIG. 6 and FIG. 8, according to some embodiments of the present application, the battery cell group 30 further comprises a third battery cell group 33 and a fourth battery cell group 34, and the box 10 further comprises a second beam 15 and a third beam 16, the third battery cell group 33 and the first battery cell group 31 are oppositely arranged on two sides of the second beam 15 along the second direction, the fourth battery cell group 34 and the second battery cell group 32 are oppositely arranged on two sides of the second beam 15 along the second direction, and the third beam 16 is located at an end of the third battery cell group 33 and the fourth battery cell group 34 away from the second beam 15 along the second direction.

[0106] The second beam 15 is located in the middle of the first beam 13 and the third beam 16 along the second direction, and can be used as a middle beam of the box 10, and the third beam 16 and the first beam 13 can be used as side walls of the box 10. Of course, in other embodiments, the third beam 16 and the first beam 13 can also be beam structures located in the box 10.

[0107] By arranging the second beam 15 between the third battery cell group 33 and the first battery cell group 31 and between the fourth battery cell group 34 and the second battery cell group 32, the structural strength of the box 10 can be improved when the number of battery cells 20 of the battery 100 is large, and the anti-expansion effect of the box 10 can be improved.

[0108] In some embodiments, the third battery cell group 33 comprises a third surface 331, the fourth battery cell group 34 comprises a fourth surface 341, and the third surface 331 and the fourth surface 341 are adjacent along the first direction and are both perpendicular to the third direction. The battery 100 further comprises a locking crimping piece 60 arranged at the abutting position of the third surface 331 and the fourth surface 341 to be connected to the third surface 331 and the fourth surface 341 at the same time, and two ends of the locking crimping piece 60 are connected to the second beam 15 and the third beam 16 respectively.

[0109] The difference between the locking crimping piece 60 and the crimping piece 40 is that the two ends of the locking crimping piece 60 can form a connection relationship with the box 10, thereby realizing locking. In some embodiments, the connection relationship between the two ends of the locking crimping piece 60 and the second beam 15 and the third beam 16 can be bolted connection, or welding, etc.

[0110] Since the third battery cell group 33 and the fourth battery cell group 34 are arranged opposite to the first battery cell group 31 and the second battery cell group 32 along the second direction, i.e., the third battery cell group 33 and the first battery cell group 31 are arranged in a row, and the fourth battery cell group 34 and the second battery cell group 32 are arranged in a row adjacent to the row, the first electrical connection 50 can be arranged only at one end between the two rows of battery cell groups 24, i.e., the first electrical connection 50 is arranged at one end of the first battery cell group 31 and the second battery cell group 32 away from the third battery cell group 33 and the fourth battery cell group 34 along the second direction, and the first electrical connection 50 is not arranged at one end of the third battery cell group 33 and the fourth battery cell group 34 away from the first battery cell group 31 and the second battery cell group 32 along the second direction.

[0111] Since the locking and crimping piece 60 is no longer affected by the first electrical connection 50, the locking and crimping piece 60 can be connected to the second beam 15 and the third beam 16 at both ends without forming a spacing space between the third beam 16. When the battery cells 20 of the third battery cell group 33 and the fourth battery cell group 34 expand and press the second beam 15 and the third beam 16 of the box 10, the deformation of the second beam 15 and the third beam 16 is reduced due to the restraint of the locking and crimping piece 60, the requirement for the structural strength of the box beam is reduced, and the risk of failure of the box 10 is reduced.

[0112] According to some embodiments of the present application, the locking and crimping piece 60 includes a metal connecting piece 61 and an insulating connecting piece 62. The metal connecting piece 61 is connected to the second beam 15 and the third beam 16. Part of the insulating connecting piece 62 is located between the third surface 331 and the metal connecting piece 61, and part of the insulating connecting piece 62 is located between the fourth surface 341 and the metal connecting piece 61.

[0113] The metal connecting piece 61 refers to a connecting piece made of a metal material, for example, the metal material can be steel or aluminum alloy material, etc. The insulating connecting piece 62 refers to a connecting piece made of an insulating material, for example, the insulating material can be cross-linked, polyurethane cross-linked, plastic, etc.

[0114] Since the metal connecting piece 61 has better structural strength, by arranging the metal connecting piece 61 connected to the second beam 15 and the third beam 16, the structural strength of the box 10 can be better improved, and the anti-expansion effect is further improved. Moreover, by arranging the insulating connecting piece 62 between the third surface 331 of the third battery cell group 33 and the metal connecting piece 61, and between the fourth surface 341 of the fourth battery cell group 34 and the metal connecting piece 61, the metal connecting piece 61 and the battery cell 20 can be insulated, and the use reliability of the battery 100 is further improved.

[0115] In some embodiments, the insulating connecting piece 62 is bonded to the third surface 331 and the fourth surface 341.

[0116] The insulating connecting piece 62 can be bonded to the third surface 331 and the fourth surface 341 by an adhesive or a bonding piece. It should be noted that the material of the adhesive and the bonding piece should also be insulating, and the bonding piece can be double-sided tape.

[0117] By bonding the insulating connecting piece 62 to the third surface 331 and the fourth surface 341, the contact between the locking and pressing piece 60 and the third battery monomer group 30 and the fourth battery monomer group 34 can be more closely, so as to fix and limit each battery monomer 20, and improve the pressing reliability.

[0118] According to some embodiments of the present application, the metal connecting piece 61 is bonded to the insulating connecting piece 62.

[0119] By bonding, the connection between the metal connecting piece 61 and the insulating connecting piece 62 can be more closely, thereby improving the insulation reliability.

[0120] According to some embodiments of the present application, the insulating connecting piece 62 covers at least part of the metal connecting piece 61.

[0121] The insulating connecting piece 62 covering at least part of the metal connecting piece 61 means that along the circumference of the metal connecting piece 61, the insulating connecting piece 62 covers at least part of the metal connecting piece 61.

[0122] In some embodiments, the insulating connecting piece 62 can be an insulating layer covering the metal connecting piece 61, for example, it can be covered on the outer circumference of the metal connecting piece 61 by a heat shrink process, or it can be bonded to cover the outer circumference of the metal connecting piece 61 in the form of a sheet.

[0123] By setting the insulating connecting piece 62 covering at least part of the metal connecting piece 61, the positional reliability between the insulating connecting piece 62 and the metal connecting piece 61 can be improved, thereby improving the insulation effect between the metal connecting piece 61 and the battery monomer 20.

[0124] Referring to FIGS. 5-8, according to some embodiments of the present application, the battery cell group 30 includes a plurality of first battery cell groups 31, a plurality of second battery cell groups 32, a plurality of third battery cell groups 33, and a plurality of fourth battery cell groups 34. The plurality of first battery cell groups 31 and the plurality of second battery cell groups 32 are alternately arranged along a first direction, and the plurality of third battery cell groups 33 and the plurality of fourth battery cell groups 34 are alternately arranged along the first direction. Each of the first battery cell groups 31 and each of the third battery cell groups 33 are oppositely arranged along a second direction on two sides of the second beam 15, and each of the second battery cell groups 32 and each of the fourth battery cell groups 34 are oppositely arranged along the second direction on two sides of the second beam 15. The first beam 13 is located at an end of the second beam 15 away from the plurality of first battery cell groups 31 and the plurality of second battery cell groups 32 along the second direction.

[0125] A first battery cell group 31 and a second battery cell group 32 adjacent along the first direction, and a third battery cell group 33 opposite to the first battery cell group 31 along the second direction and a fourth battery cell group 34 opposite to the second battery cell group 32 along the second direction combine to form a sub battery cell group. The battery cell group 30 includes at least two sub battery cell groups adjacent along the first direction.

[0126] The crimping member 40 includes a first crimping member 41 and a second crimping member 42. The first crimping member 41 is arranged in one of the sub battery cell groups, and the second crimping member 42 is arranged in another of the sub battery cell groups together with the locking crimping member 60.

[0127] The first crimping member 41 is arranged at the joint of the first surface 311 of the first battery cell group 31 and the second surface 321 of the second battery cell group 32 adjacent to the first battery cell group 31 to be electrically connected to the first surface 311 and the second surface 321. The first crimping member 41 extends along the second direction and is spaced apart from the first beam 13. The first electrical connecting member 50 is arranged to electrically connect the first battery cell group 31 and the second battery cell group 32, and at least part of the first electrical connecting member 50 is arranged at the space between the crimping member 40 and the first beam 13. The first crimping member 41 extends along the second direction and across the second beam 15 to be electrically connected to the third surface 331 and the fourth surface 341.

[0128] The second crimping piece 42 is arranged at the abutting position of the first surface 311 of the first battery monomer group 31 and the second surface 321 of the second battery monomer group 32 adjacent to the first surface 311 to be connected to the first surface 311 and the second surface 321 simultaneously. The first crimping piece 41 extends along the second direction and is arranged at a position spaced apart from the first beam 13. The first electric connecting piece 50 is used to electrically connect the first battery monomer group 31 and the second battery monomer group 32, and at least part of the first electric connecting piece 50 is located at a position spaced apart from the crimping piece 40 and the first beam 13. The locking crimping piece 60 is arranged at the abutting position of the third surface 331 and the fourth surface 341 to be connected to the third surface 331 and the fourth surface 341 simultaneously, and two ends of the locking crimping piece 60 are connected to the second beam 15 and the third beam 16 respectively.

[0129] In this way, various crimping pieces 40 and the cooperation modes of the crimping pieces 40 and the locking crimping piece 60 can be arranged in the battery 100. In addition to the effect of avoiding the first electric connecting piece 50, on the one hand, the first crimping piece 40 can be used to simultaneously press and connect four battery monomer groups 30 adjacent to each other, thereby improving the crimping efficiency. On the other hand, the cooperation mode of the second crimping piece 40 and the locking crimping piece 60 can be used to reduce the deformation of the second beam 15 and the third beam 16, thereby reducing the requirement for the structural strength of the beams of the box body and reducing the risk of failure of the box body 10.

[0130] In some embodiments, the application also provides a power utilization device comprising the battery 100 in any of the above embodiments. The battery 100 is used to provide electric energy.

[0131] By arranging at least part of the first electric connecting piece 50 at a position spaced apart from the crimping piece 40 and the first beam 13, the crimping piece 40 can avoid the first electric connecting piece 50, and the position of the first electric connecting piece 50 does not interfere with the crimping piece 40. By arranging the crimping piece 40 to be connected to the first surface 311 of the first battery monomer group 31 and the second surface 321 of the second battery monomer group 32 simultaneously, the connection of each battery monomer 20 of the two adjacent battery monomer groups 30 can be realized, each battery monomer 20 can be fixed and positioned, and when the battery monomer 20 expands to press the box body 10, the deformation of the box body 10 is reduced due to the restraint of the crimping piece 40, the requirement for the structural strength of the beams of the box body is reduced, and the risk of failure of the box body 10 is reduced.

[0132] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0133] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery, comprising: a case comprising a first beam; a battery cell group comprising a first battery cell group and a second battery cell group adjacently arranged along a first direction, the first battery cell group and the second battery cell group each comprising a plurality of battery cells stacked along a second direction, the first battery cell group comprising a first surface and the second battery cell group comprising a second surface, the first surface and the second surface being adjacent along the first direction and each being perpendicular to a third direction, the first direction, the second direction and the third direction being mutually perpendicular two by two; and a press-fit member arranged at a joint of the first surface and the second surface to simultaneously connect to the first surface and the second surface; wherein the first beam is located at one end of the first battery cell group and the second battery cell group along the second direction, the press-fit member extends along the second direction and is arranged spaced apart from the first beam, the battery further comprises a first electrical connection member for electrically connecting the first battery cell group and the second battery cell group, at least part of the first electrical connection member being located at the spacing between the press-fit member and the first beam.

2. The battery of claim 1, wherein, The battery cell group further comprises a third battery cell group and a fourth battery cell group, the battery further comprises a partition member, the third battery cell group and the first battery cell group are oppositely arranged on two sides of the partition member along the second direction, the fourth battery cell group and the second battery cell group are oppositely arranged on two sides of the partition member along the second direction, the third battery cell group comprises a third surface and the fourth battery cell group comprises a fourth surface, the third surface and the fourth surface are adjacent along the first direction and each is perpendicular to the third direction, the press-fit member extends along the second direction and across the partition member to connect to the third surface and the fourth surface.

3. The battery of claim 2, wherein, The case further comprises a carrier for carrying the battery cell group, the partition member comprises a first wall surface away from the carrier along the third direction, a minimum distance between the third surface and the carrier is greater than or equal to a minimum distance between the first wall surface and the carrier.

4. The battery of claim 2 or 3, wherein, The case further comprises a carrier for carrying the battery cell group, the partition member comprises a first wall surface away from the carrier along the third direction, a minimum distance between the fourth surface and the carrier is greater than or equal to a minimum distance between the first wall surface and the carrier.

5. The battery of claim 2, wherein, The partition member comprises a relief groove with an opening facing the third direction, at least part of the press-fit member is located in the relief groove.

6. The battery of any one of claims 1 to 5, wherein, The battery cell group further comprises a third battery cell group and a fourth battery cell group, the case further comprises a second beam and a third beam, the third battery cell group and the first battery cell group are oppositely arranged on two sides of the second beam along the second direction, the fourth battery cell group and the second battery cell group are oppositely arranged on two sides of the second beam along the second direction, the third beam is located at a side of the third battery cell group and the fourth battery cell group away from the second beam along the second direction.

7. The battery of claim 6, wherein, The third cell group comprises a third surface, the fourth cell group comprises a fourth surface, the third surface and the fourth surface are adjacent along the first direction and are both perpendicular to the third direction, the battery further comprises a locking crimping piece, the locking crimping piece is arranged at the adjacent position of the third surface and the fourth surface to be connected to the third surface and the fourth surface at the same time, and two ends of the locking crimping piece are connected to the second beam and the third beam respectively.

8. The battery of claim 7, wherein, The locking crimping piece comprises a metal connecting piece and an insulating connecting piece, the metal connecting piece is connected to the second beam and the third beam, part of the insulating connecting piece is located between the third surface and the metal connecting piece, and part of the insulating connecting piece is located between the fourth surface and the metal connecting piece.

9. The battery of claim 8, wherein, The insulating connecting piece is bonded to the third surface and the fourth surface.

10. The battery of claim 9, wherein, The metal connecting piece is bonded to the insulating connecting piece.

11. The battery of claim 9, wherein, The insulating connecting piece covers at least part of the metal connecting piece.

12. The battery of any one of claims 1 to 11, wherein, The crimping piece is bonded to the first surface and the second surface.

13. The battery of any one of claims 1 to 12, wherein, The first cell group comprises a first cell directly connected to the first electrical connecting piece, the second cell group comprises a second cell directly connected to the first electrical connecting piece, and the crimping piece is completely dislocated from the first cell in the third direction projection.

14. The battery of any one of claims 1 to 13, wherein, The first cell group comprises a first cell directly connected to the first electrical connecting piece, the second cell group comprises a second cell directly connected to the first electrical connecting piece, and the crimping piece is completely dislocated from the second cell in the third direction projection.

15. The battery of claims 1-14, wherein, The crimping piece is an epoxy glass fiber composite material.

16. An electric device comprising the battery of any one of claims 1-15, the battery being used to provide electric energy.

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