Battery and electric device

Abstract

A battery (100) and an electric device (200). The battery (100) comprises: a frame (10); a plurality of battery cells (20), the plurality of battery cells (20) are all arranged in the frame (10), and the plurality of battery cells (20) are stacked along a first direction; and the buffer structures (30) are arranged between at least two adjacent battery monomers (20) and / or between the battery monomer (20) at the outermost end and the frame (10) along the first direction.

Description

Batteries and electrical devices Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery and an electrical device having the battery. Background Art

[0002] In the related art, a plurality of battery cells are arranged in a shell of an existing battery. When the volume of the battery cells expands greatly, a large expansion force is generated. The expansion force acts on the battery frame and easily causes the battery frame to deform.

[0003] Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, an embodiment of the present application provides a battery in which, when a battery cell in the battery expands, the battery cell moves along the stacking direction of the battery cell, thereby reducing the squeezing force on the frame.

[0005] The embodiment of the present application also provides an electrical device.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0007] frame;

[0008] A plurality of battery cells, each of which is disposed in the frame and stacked along a first direction;

[0009] A buffer structure is provided along the first direction between at least two adjacent battery cells and / or between the outermost battery cell and the frame.

[0010] In the above technical solution, a buffer structure is provided between two adjacent battery cells and / or between the outermost battery cell and the frame. When the battery cell expands, the battery cell is subjected to the expansion extrusion force and moves along the stacking direction of the battery cell, and the buffer structure is compressed. Compared with the prior art, this can reduce the expansion extrusion force on the battery cell and the extrusion force on the frame, thereby greatly reducing the risk of frame deformation and improving battery reliability.

[0011] In some embodiments, a buffer structure is provided between the outermost battery cell and the frame, and the buffer structure abuts against adjacent battery cells and the frame.

[0012] In the above technical solution, on the one hand, the buffer structure can be firmly arranged between the battery cell located at the outermost end and the frame by abutting the adjacent battery cells and the frame. In addition, the buffer structure can support the battery cell so that multiple battery cells can be reliably assembled in the frame, reducing the risk of the battery cell shaking in the frame. On the other hand, the buffer structure between the battery cell located at the outermost end and the frame can better reduce the extrusion force on the frame.

[0013] In some embodiments, along the first direction, an orthographic projection of the housing of the battery cell is located within an orthographic projection of the buffer structure.

[0014] In the above technical solution, the outer shell projection of the battery cell is located within the outer projection of the buffer structure, so that the buffer structure can be set up with sufficient area. When the battery cell expands, the battery cell moves toward the buffer structure, so that the battery cell can be squeezed into the buffer structure, and the buffer structure can absorb more expansion force, which can further reduce the expansion extrusion force on the battery cell and the extrusion force on the frame, thereby reducing the risk of deformation of the frame due to force.

[0015] In some embodiments, the buffer structure has a first surface and a second surface opposite to each other, the first surface and the second surface are respectively planes, and the first surface and the second surface are in contact with adjacent battery cells and the frame, respectively.

[0016] In the above technical solution, by setting the first surface and the second surface, both the first surface and the second surface are planes, the buffer structure and the battery cell can be in surface contact, and the buffer structure and the frame can be in surface contact. When the battery cell moves along the first direction, the battery cell and the buffer structure can be evenly stressed, reducing the stress concentration on the battery cell and the buffer structure.

[0017] In some embodiments, the buffer structure has a through hole therein.

[0018] In the above technical solution, by setting through holes, the buffer structure is facilitated to be compressed, so that the buffer structure can better absorb the expansion force. In addition, by setting through holes, the weight of the buffer structure can be reduced, which is conducive to realizing the lightweight design of the battery. At the same time, it can also reduce the materials used in the production of the buffer structure, reduce the production cost of the buffer structure, and thus reduce the production cost of the battery.

[0019] In some embodiments, the through hole is plural.

[0020] In the above technical solution, by setting a plurality of through holes, it is more conducive to the compression of the buffer structure, so that the buffer structure can better absorb the expansion force. Moreover, by setting a plurality of through holes, the weight of the buffer structure can be further reduced, which is more conducive to realizing the lightweight design of the battery. At the same time, it can also further reduce the materials used in the production of the buffer structure, further reduce the production cost of the buffer structure, and thus further reduce the production cost of the battery.

[0021] In some embodiments, the through-hole is a strip-shaped structure and extends along a second direction perpendicular to the first direction.

[0022] In the above technical solution, by extending the through holes along the second direction, the setting area of ​​the through holes can be increased, which is more conducive to the compression of the buffer structure, so that the buffer structure can better absorb the expansion force, and can further reduce the weight of the buffer structure, which is more conducive to achieving a lightweight design of the battery.

[0023] In some embodiments, the plurality of through holes are parallel to each other.

[0024] In the above technical solution, by arranging multiple through holes in parallel with each other, the structural strength of each area of ​​the buffer structure can be made substantially the same. When the buffer structure is squeezed, the compression amount of each area of ​​the buffer structure can be made substantially the same.

[0025] In some embodiments, the plurality of through holes are spaced apart along a third direction perpendicular to the first direction, and the second direction is perpendicular to the third direction.

[0026] In the above technical solution, by arranging multiple through holes at intervals along the third direction, the structural strength of each area of ​​the buffer structure can be further made roughly the same. When the buffer structure is squeezed, the compression amount of each area of ​​the buffer structure is roughly the same.

[0027] In some embodiments, the cross-sectional shape of the through-hole is circular or polygonal.

[0028] In the above technical solution, by setting the cross-sectional shape of the through hole to be circular or polygonal, the through hole can better absorb compressive deformation and reduce the stress on the battery cell and the frame.

[0029] In some embodiments, a through hole is provided in the buffer structure, and the buffer structure has a first surface and a second surface opposite to each other along a first direction. The cross-sectional shape of the through hole is a long strip. The through hole is located between the first surface and the second surface. From the first surface to the second surface, the through hole is arranged obliquely between the first surface and the second surface.

[0030] In the above technical solution, the through holes are arranged obliquely between the first surface and the second surface, which helps to compress the buffer structure when the battery cell expands.

[0031] In some embodiments, the cross section of the through hole has a longest hole sidewall opposite to the first surface, and the angle formed between the hole sidewall and the first surface or the second surface is α, satisfying the relationship: 40°≤α≤50°.

[0032] In the above technical solution, by setting 40°≤α≤50°, when the battery cell expands, it is more conducive to the compression of the buffer structure, and when the volume of the battery cell decreases, it is convenient for the buffer structure to rebound and return to its original shape.

[0033] In some embodiments, a height of an end portion of the through hole close to the first surface is lower than a height of an end portion of the through hole close to the second surface, and the first surface is used to abut against the battery cell.

[0034] In the above technical solution, the height of the end of the through hole close to the first surface is lower than the height of the end of the through hole close to the second surface. After the first surface contacts the battery cell, when the battery cell expands, the buffer structure is compressed, causing the battery cell to have a downward movement tendency, which can reduce the risk of the battery cell moving upward.

[0035] In some embodiments, the buffer structure has a first surface and a second surface opposite to each other along a first direction, and a supporting boss is provided on the first surface or the second surface, and the supporting boss abuts against an adjacent battery cell or frame.

[0036] In the above technical solution, by providing a supporting boss on the first surface or the second surface, when the battery cell moves along the first direction, the buffer structure is facilitated to deform.

[0037] In some embodiments, there are multiple supporting bosses.

[0038] In the above technical solution, by providing a plurality of supporting bosses, the deformation of the buffer structure is more facilitated when the battery cell moves along the first direction.

[0039] In some embodiments, at least two supporting bosses are configured as strip-shaped bosses parallel to each other.

[0040] In the above technical solution, by constructing at least two supporting bosses as parallel strip bosses, the structural strength of each area of ​​the buffer structure can be roughly the same. When the buffer structure is squeezed, the buffer structure is subjected to uniform force, so that the compression amount of each area of ​​the buffer structure is roughly the same.

[0041] In some embodiments, the compressive deformation of the buffer structure is A, which satisfies the relationship: 10%≤A≤60%.

[0042] In the above technical solution, by setting 10%≤A≤60%, it is possible to prevent the buffer structure from being over-compressed, and the buffer structure can rebound after being compressed.

[0043] In some embodiments, the material of the buffer structure includes one or more of polymer rubber, polyurethane foam, pine elastic board or fiber cotton.

[0044] In the above technical solution, by setting the manufacturing material of the buffer structure to at least one of polymer rubber parts, polyurethane foam parts, pine elastic plates, and fiber cotton, the buffer structure can be made compressible and elastic, and the buffer structure can rebound after being compressed.

[0045] In some embodiments, the plurality of battery cells are movable along the first direction.

[0046] In some embodiments, multiple battery cells are movable along a first direction. When a battery cell expands, the battery cell is subjected to the expansion squeezing force and moves along the stacking direction of the battery cell. The buffer structure is compressed, which can reduce the squeezing force on the frame and greatly reduce the risk of frame deformation. In addition, the expansion squeezing force on the battery cell can be reduced, reducing the risk of the battery cell being squeezed and damaged, thereby further improving battery reliability.

[0047] In some embodiments, the frame and the plurality of battery cells are guided and cooperated to enable the plurality of battery cells to move along the first direction.

[0048] In the above technical solution, during the movement of the battery cells, the frame cooperates with the plurality of battery cell guides to enable the battery cells to move along the first direction, thereby reducing the risk of battery cell deviation.

[0049] In some embodiments, the frame includes: a first end limiter and a second end limiter. In a first direction, the first end limiter and the second end limiter are respectively located at both ends of the battery cell, and multiple battery cells are located between the first end limiter and the second end limiter.

[0050] In the above technical solution, by providing the first end stopper and the second end stopper, the first end stopper and the second end stopper can limit the battery cell in the first direction.

[0051] In some embodiments, the frame also includes: a guide limit member, which is connected between the first end limit member and the second end limit member to fix the first end limit member and the second end limit member to be fixedly connected, and the guide limit member is guided and cooperated with multiple battery cells so that the battery cells can move along the first direction.

[0052] In the above technical solution, by providing a guide limiter, the guide limiter cooperates with multiple battery cells to guide the battery cells, so that the battery cells can move along the first direction, reducing the risk of the battery cells being deflected after being subjected to expansion force.

[0053] In some embodiments, the guide limit plate includes: a first limit plate, a second limit plate, a third limit plate and a fourth limit plate. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all connected between the first end limit plate and the second end limit plate and are located on the outside of the battery cell. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are respectively opposite to different surfaces of the battery cell, and the first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all abutted against the battery cell for limitation.

[0054] In the above technical solution, the first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate simultaneously limit and guide the battery cell. When the battery cell moves due to the expansion force, the battery cell can be moved along the battery cell stacking direction.

[0055] In some embodiments, the guide limit member includes: a limit slide rail, the limit slide rail defines a guide space, the limit slide rail is connected between the first end limit member and the second end limit member, and the shoulders of multiple battery cells are assembled in the guide space so that the battery cells abut against the limit slide rail for limitation.

[0056] In the above technical solution, after the battery is assembled, the shoulder of the battery cell is assembled in the guide space. When the battery cell abuts against the limiting slide rail, the limiting slide rail can limit the movement of the battery cell so that the battery cell can only move in the stacking direction.

[0057] In some embodiments, there are multiple limiting slide rails, and at least two shoulders of each battery cell are correspondingly provided with limiting slide rails, and the shoulders are located in corresponding guide spaces.

[0058] In the above technical solution, the battery cells are guided simultaneously by multiple limiting slides, so that the battery cells can only move along the battery cell stacking direction, further reducing the risk of battery cell deviation. In addition, the battery cells are supported by multiple limiting slides, so that the battery cells can be firmly installed in the frame.

[0059] In some embodiments, the two shoulders below the battery cell are respectively provided with a limiting slide rail to form an exhaust gap between the two limiting slide rails, and the exhaust gap is opposite to the explosion-proof valve of the battery cell.

[0060] In the above technical solution, by setting the exhaust gap, when the battery cell experiences thermal runaway, the explosion-proof valve opens, and the exhaust gap helps the material ejected from the explosion-proof valve to be discharged from the battery cell faster.

[0061] In some embodiments, the limiting slide rail includes: a first plate and a second plate, the first plate and the second plate are connected, and an angle is formed between the first plate and the second plate so that the limiting slide rail defines a guide space.

[0062] In the above technical solution, the angle formed between the first plate and the second plate allows the limiting slide rail to define the guide space, which can achieve the effect of the limiting slide rail defining the guide space and make the limiting slide rail structure setting reasonable.

[0063] In some embodiments, the first plate and the second plate are perpendicular.

[0064] In the above technical solution, the first plate and the second plate are arranged vertically. After the limiting slide rail and the battery cell are assembled, the first plate and the second plate can reliably limit the battery cell, thereby improving the reliability of the battery.

[0065] In some embodiments, the first plate abuts against the end surface of the battery cell to limit its position, and the second plate abuts against the side surface of the battery cell to limit its position.

[0066] In the above technical solution, the first plate body abuts and limits the end surface of the battery cell, and the second plate body abuts and limits the side surface of the battery cell, so that each limiting slide rail can limit the battery cell in the Y and Z directions, thereby improving the reliability of the battery.

[0067] In some embodiments, the battery further includes: an electrical connector, the electrical connector including a first connecting portion, a second connecting portion and an elastic segment, the first connecting portion and the second connecting portion are respectively connected to the electrode terminals of the corresponding battery cells, and the elastic segment is connected between the first connecting portion and the second connecting portion.

[0068] In the above technical solution, the elastic segment is connected between the first connecting portion and the second connecting portion. When the battery cell moves in the first direction, the elastic segment stretches, reducing the risk of tearing or disconnection at the connection between the electrical connector and the electrode terminal, improving the connection reliability between the electrical connector and the electrode terminal, and improving the operating reliability of the battery.

[0069] In some embodiments, the elastic segment has a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment is connected between the second connecting segment and the first connecting portion, and the third connecting segment is connected between the second connecting segment and the second connecting portion.

[0070] In the above technical solution, by providing the first connecting segment, the second connecting segment and the third connecting segment, the elastic segment can be made elastic and retractable.

[0071] In some embodiments, a dimension of the second connecting segment in a width direction of the electrical connector is greater than a dimension of the second connecting segment in a length direction of the electrical connector.

[0072] In the above technical solution, the second connecting section is extended in the width direction of the electrical connector by making the width L1 of the second connecting section larger than the length L2 of the second connecting section. This makes the electrical connector more retractable.

[0073] In some embodiments, the first connection segment is smaller in the width direction of the electrical connector than in the length direction of the electrical connector and / or the third connection segment is smaller in the width direction of the electrical connector than in the length direction of the electrical connector.

[0074] In the above technical solution, the dimension L3 of the first connecting section in the width direction of the electrical connector is smaller than the dimension L4 of the first connecting section in the length direction of the electrical connector, so that the first connecting section is extended in the length direction of the electrical connector, which can further make the elastic section elastic and improve the telescopic performance of the electrical connector. Moreover, the dimension L5 of the third connecting section in the width direction of the electrical connector is smaller than the dimension L6 of the third connecting section in the length direction of the electrical connector, so that the third connecting section is extended in the length direction of the electrical connector, further improving the telescopic performance of the electrical connector and being more conducive to the telescopic performance of the electrical connector.

[0075] In some embodiments, the second connecting segment includes: a plurality of first segments and at least one second segment, the plurality of first segments are sequentially spaced apart in the length direction of the electrical connector, and a second segment is connected between any two adjacent first segments.

[0076] In the above technical solution, by providing multiple first segments and at least one second segment, the elastic segment can be made elastic and the electrical connector can be made retractable, thereby reducing the risk of the electrical connector being unable to retract when the battery cell moves.

[0077] In some embodiments, at least one first segment has a dimension L7 in the electrical connector width direction that is greater than a dimension L8 in the electrical connector length direction, and a second segment has a dimension L9 in the electrical connector width direction that is less than a dimension L10 in the electrical connector length direction.

[0078] In the above technical solution, by having at least one first segment having a dimension in the width direction of the electrical connector that is larger than that of the first segment in the length direction of the electrical connector, and having a dimension in the width direction of the electrical connector that is smaller than that of the second segment in the length direction of the electrical connector, at least one first segment can be extended in the width direction of the electrical connector and the second segment can be extended in the length direction of the electrical connector, the elastic segment can be made elastic, and the electrical connector can be made stretchable, thereby reducing the risk of the electrical connector being unable to stretch when the battery cell moves.

[0079] In some embodiments, at least two first segments are parallel to each other.

[0080] In the above technical solution, by having at least two first sections parallel to each other, the second connecting section can be constructed into a bent structure, which can improve the elasticity of the second connecting section and thus improve the elasticity of the electrical connector.

[0081] In some embodiments, in the length direction of the electrical connector, the second segment located at the outermost end is staggered with the adjacent first connecting segment and / or third connecting segment in the width direction of the electrical connector.

[0082] In the above technical solution, by staggering the second segment at the outermost end and the adjacent first connecting segment and / or third connecting segment in the width direction of the electrical connector, the elasticity of the electrical connector can be further increased, facilitating the expansion and contraction of the electrical connector.

[0083] In some embodiments, the first connecting segment and the third connecting segment are staggered in the width direction of the electrical connector.

[0084] In the above technical solution, by staggering the first connecting segment and the third connecting segment, the elastic segment can be made elastic and have telescopic properties, which is conducive to deformation of the elastic segment and further prevents the electrical connector from being disconnected from the corresponding electrode terminal.

[0085] In some embodiments, in the length direction of the electrical connector, the first connecting segment and the third connecting segment correspond to each other.

[0086] In the above technical solution, by arranging the first connecting section and the third connecting section correspondingly in the length direction of the electrical connector, the deformation of the elastic section can be increased, and the retractability of the electrical connector can be improved.

[0087] In some embodiments, the elastic segment is configured as a helical structure.

[0088] In the above technical solution, the elastic section can be configured to be similar to a coil spring shape, so that the elastic section has elasticity and is stretchable, thereby making the electrical connector stretchable.

[0089] In some embodiments, the first connecting portion, the second connecting portion and the elastic segment are integrally formed.

[0090] In the above technical solution, by integrally forming the first connecting part, the second connecting part and the elastic segment, the connection strength between the first connecting part, the second connecting part and the elastic segment can be improved, and the elastic segment can be prevented from separating from the first connecting part and the second connecting part. In addition, there is no need to produce electrical connectors separately, which can reduce the number of molds developed and reduce manufacturing costs.

[0091] In some embodiments, the elastic segment has a plurality of notched grooves, which penetrate the elastic segment in the thickness direction of the elastic segment, and the plurality of notched grooves are spaced apart in sequence in the length direction of the electrical connector, and at least one of the notched grooves extends to a side edge of the elastic segment in the width direction of the electrical connector.

[0092] In the above technical solution, by providing multiple notches, the elastic section can be made elastic. When the battery cell moves, the elastic section expands and contracts, reducing the risk of tearing or disconnection at the connection between the electrical connector and the electrode terminal of the corresponding battery cell.

[0093] In some embodiments, a dimension of each notch in a width direction of the electrical connector is greater than a dimension of each notch in a length direction of the electrical connector.

[0094] In the above technical solution, by making the dimension of each notch in the width direction of the electrical connector larger than the dimension of the notch in the length direction of the electrical connector, the notch can be set as a strip-shaped notch, which facilitates deformation of the elastic section when the first connecting part and the second connecting part are subjected to force.

[0095] In some embodiments, the notch grooves are provided on both sides of the elastic segment in the width direction of the electrical connector.

[0096] In the above technical solution, by providing notches on both sides of the elastic section, the electrical connector can be made retractable, thereby improving the working performance of the electrical connector.

[0097] In a second aspect, an embodiment of the present application further provides an electrical device comprising the above-mentioned battery.

[0098] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] FIG1 is a schematic diagram of an electrical device according to an embodiment of the present application;

[0100] FIG2 is a schematic diagram of a battery according to an embodiment of the present application;

[0101] FIG3 is a schematic diagram of a battery according to an embodiment of the present application;

[0102] FIG4 is a schematic diagram of a battery according to an embodiment of the present application from another angle;

[0103] FIG5 is a schematic diagram of a battery according to an embodiment of the present application from another angle;

[0104] FIG6 is a schematic diagram of a battery according to an embodiment of the present application from another angle;

[0105] FIG7 is a schematic diagram of a buffer structure according to a first embodiment of the present application;

[0106] FIG8 is a schematic diagram of a buffer structure according to an embodiment of the present application from another angle;

[0107] FIG9 is a cross-sectional view at point BB in FIG7 ;

[0108] FIG10 is a schematic diagram of a buffer structure according to a second embodiment of the present application;

[0109] Figure 11 is an enlarged view of point C in Figure 9;

[0110] FIG12 is a schematic diagram of a buffer structure according to a third embodiment of the present application;

[0111] FIG13 is a schematic diagram of a buffer structure according to the third embodiment of the present application from another angle;

[0112] FIG14 is a schematic diagram of a first end stopper according to an embodiment of the present application;

[0113] FIG15 is a schematic diagram of a position-limiting slide rail according to an embodiment of the present application;

[0114] FIG16 is an enlarged view of point D in FIG14;

[0115] FIG17 is a schematic diagram of an electrical connector according to a first embodiment of the present application;

[0116] FIG18 is a schematic diagram of an electrical connector according to a second embodiment of the present application;

[0117] FIG19 is a schematic diagram of a battery cell according to an embodiment of the present application. DETAILED DESCRIPTION

[0118] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0119] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0120] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0121] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0122] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0123] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0124] The term "plurality" used in this application refers to two or more (including two).

[0125] The battery 100 mentioned in the embodiment of the present application may include one or more battery cells 20 to provide a single physical module with higher voltage and capacity. When there are multiple battery cells 20, the multiple battery cells 20 are connected in series, parallel or hybrid via electrical connectors 40.

[0126] In some embodiments, the battery 100 may be a battery module. When there are multiple battery cells 20 , the multiple battery cells 20 are arranged and fixed to form a battery module.

[0127] In some embodiments, the battery 100 may be a battery pack, which includes a case and battery cells 20 . The battery cells 20 or battery modules are housed in the case.

[0128] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0129] In some embodiments, the battery 100 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0130] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0131] The battery cell 20 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 metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the present application.

[0132] A battery cell 20 typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell 20, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0133] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0134] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0135] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0136] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0137] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0138] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium.

[0139] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0140] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0141] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0142] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0143] In some embodiments, the electrode assembly is a laminate structure.

[0144] In some embodiments, the battery cell 20 may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0145] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0146] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter component. The electrode terminal may be provided on an end cap or on the housing.

[0147] In some embodiments, the housing is provided with an explosion-proof valve 23. The explosion-proof valve 23 is used to release the internal pressure of the battery cell.

[0148] As an example, the battery cell 20 may be a cylindrical battery cell 20, a prismatic battery cell 20, a soft-pack battery cell 20, or a battery cell 20 of another shape. Prismatic battery cells 20 include prismatic battery cells 20, blade-shaped battery cells 20, and polygonal prismatic cells. Polygonal prismatic cells, for example, hexagonal prismatic cells, are not particularly limited in this embodiment of the present application. Referring to FIG. 4 , this embodiment of the present application uses a prismatic battery cell 20 as an example.

[0149] New energy vehicles have experienced rapid growth in recent years. Batteries, as the power source, play an irreplaceable and crucial role in electric vehicles. Batteries consist of a housing and multiple cells contained within it. As core components of new energy vehicles, batteries are subject to stringent requirements in terms of both safety and cycle life.

[0150] The inventors discovered that when existing batteries are charging, the volume of the battery cells expands significantly, resulting in a large expansion force. After the expansion force acts on adjacent battery cells, the battery cells are squeezed and easily crushed. In addition, the expansion force acts on the battery frame, which easily causes the battery frame to deform, affecting the battery cycle life.

[0151] Based on the above considerations, in order to solve the problem of the battery frame being squeezed and deformed when the battery is charging, the inventor has designed a battery after in-depth research. A buffer structure is provided between two adjacent battery cells and / or between the outermost battery cell and the frame. When the battery cell expands, the battery cell is subjected to the expansion squeezing force and moves along the stacking direction of the battery cell 20, and the buffer structure is compressed. Compared with the existing technology, the expansion squeezing force on the battery cell can be reduced, and the squeezing force on the frame can also be reduced, which greatly reduces the risk of frame deformation, thereby improving the battery reliability and the battery cycle life.

[0152] The battery disclosed in the embodiments of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships, or aircraft, which is beneficial to expanding the scope of application of the battery.

[0153] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0154] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0155] In some embodiments of the present application, the battery can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0156] The following describes a battery 100 according to an embodiment of the present application with reference to FIG. 1 to FIG. 19 .

[0157] As shown in Figures 2-5 , a battery 100 according to an embodiment of the present application includes a frame 10, a buffer structure 30, and a plurality of battery cells 20. The plurality of battery cells 20 are disposed within the frame 10 and are stacked along a first direction. Along the first direction, a buffer structure 30 is disposed between at least two adjacent battery cells 20 and / or between the outermost battery cell 20 and the frame 10.

[0158] When the battery 100 is a battery pack, the frame 10 can be the box structure of the battery 100, or the frame 10 can be a portion of the box structure of the battery 100. When the battery 100 is a battery module (i.e., a battery assembly), the frame 10 can be the first end stopper and the second end stopper of the battery module, or the frame 10 can be the first end stopper, the second end stopper, and the guide stopper mentioned below of the battery module, or the frame 10 can be the first end stopper, the second end stopper, and the side plate structure of the battery module, with the side plate structure connecting the first end stopper and the second end stopper to form the frame 10 surrounding the multiple battery cells 20.

[0159] The buffer structure 30 may be a buffer pad. Any structural member that can provide the buffer structure 30 with an elastic buffering effect may be constructed as the buffer structure 30 .

[0160] Multiple battery cells 20 are disposed within the frame 10. The multiple battery cells 20 are stacked sequentially along the thickness direction of the battery cells 20. The thickness direction of the battery cells 20 may be a first direction. When the battery 100 is placed in the orientation shown in FIG. 2 , the first direction refers to the X direction in FIG. Along the stacking direction (first direction) of the battery cells 20, i.e., along the X direction of the battery 100 in FIG. 2 , a buffer structure 30 is disposed between at least two adjacent battery cells 20 and / or between the outermost battery cell 20 and the frame 10. Alternatively, it may be understood that a buffer structure 30 is disposed between at least two adjacent battery cells 20, or between the outermost battery cell 20 and the frame 10 along the first direction, or between at least two adjacent battery cells 20 and between the outermost battery cell 20 and the frame 10. The present embodiment takes the buffer structure 30 disposed between the outermost battery cell 20 and the frame 10 along the first direction as an example.

[0161] As shown in Figure 2, the large surfaces of two adjacent battery cells 20 are positioned facing each other. The buffer structure 30 is compressible and has a certain degree of elasticity, absorbing force when compressed. When a battery cell 20 expands, its volume increases, and the buffer structure 30 is compressed to absorb the expansion force. Compared with the prior art, this can reduce the compressive force exerted on the battery cell 20, reducing the risk of damage to the battery cell 20. It can also reduce the compressive force exerted on the frame 10, significantly reducing the risk of deformation of the frame 10, thereby improving the reliability of the battery 100 and increasing the cycle life of the battery 100.

[0162] In the above technical solution, a buffer structure 30 is provided between two adjacent battery cells 20 and / or between the outermost battery cell 20 and the frame 10. When the battery cell 20 expands, the battery cell 20 moves along the first direction after being subjected to the expansion extrusion force, and the buffer structure 30 is compressed. Compared with the prior art, this can reduce the expansion extrusion force on the battery cell 20 and the extrusion force on the frame 10, thereby greatly reducing the risk of deformation of the frame 10 and improving the reliability of the battery 100.

[0163] According to some embodiments of the present application, as shown in FIG. 2 to FIG. 5 , a buffer structure 30 is provided between the outermost battery cell 20 and the frame 10 , and the buffer structure 30 abuts against adjacent battery cells 20 and the frame 10 .

[0164] The outermost battery cell 20 refers to the battery cell 20 located outermost in the first direction. A buffer structure 30 is disposed between the outermost battery cell 20 and the frame 10. The buffer structure 30 abuts against both the adjacent battery cell 20 and the frame 10. After the buffer structure 30 is disposed between the outermost battery cell 20 and the frame 10, the surface of the buffer structure 30 facing the battery cell 20 abuts against the battery cell 20, and the surface of the buffer structure 30 facing the frame 10 abuts against the frame 10. This allows the buffer structure 30 to be securely disposed between the outermost battery cell 20 and the frame 10. Furthermore, the buffer structure 30 supports the battery cell 20, allowing multiple battery cells 20 to be securely assembled within the frame 10 and reducing the risk of the battery cells 20 shaking within the frame 10. Furthermore, the buffer structure between the outermost battery cell 20 and the frame 10 can effectively reduce the compressive forces exerted on the frame 10.

[0165] According to some embodiments of the present application, along the first direction, the orthographic projection of the housing of the battery cell 20 is located within the orthographic projection of the buffer structure 30 .

[0166] That is, along the stacking direction of the battery cells 20, in other words, along the X direction in Figure 2, the orthographic projection of the outer shell of the battery cell 20 is located within the orthographic projection of the buffer structure 30. The orthographic projection area of ​​the buffer structure 30 is greater than or equal to the orthographic projection area of ​​the outer shell of the battery cell 20. When the orthographic projection area of ​​the buffer structure 30 is greater than the orthographic projection area of ​​the outer shell of the battery cell 20, the orthographic projection of the outer shell of the battery cell 20 is located within the orthographic projection of the buffer structure 30. When the orthographic projection area of ​​the buffer structure 30 is equal to the orthographic projection area of ​​the outer shell of the battery cell 20, the orthographic projection of the outer shell of the battery cell 20 and the orthographic projection of the buffer structure 30 overlap.

[0167] In the above technical solution, the outer shell projection of the battery cell 20 is located within the outer projection of the buffer structure 30, so that the setting area of ​​the buffer structure 30 can be sufficient. When the battery cell 20 expands, the battery cell 20 moves toward the buffer structure 30, so that the battery cell 20 can be squeezed into the buffer structure 30, and the buffer structure 30 can absorb more expansion force, which can further reduce the expansion extrusion force on the battery cell 20 and the extrusion force on the frame 10, thereby reducing the risk of deformation of the frame 10 due to force.

[0168] According to some embodiments of the present application, the buffer structure 30 has a first surface 31 and a second surface 32 opposite to each other. The first surface 31 and the second surface 32 are planes, and the first surface 31 and the second surface 32 are in contact with the adjacent battery cells 20 and the frame 10 respectively.

[0169] As shown in Figure 5, in the thickness direction of the buffer structure 30, the buffer structure 30 has a first surface 31 and a second surface 32 relative to each other, and the first surface 31 and the second surface 32 are both planes. The first surface 31 of the buffer structure 30 located between the outermost battery cell 20 and the frame 10 contacts the adjacent battery cell 20, and the second surface 32 contacts the adjacent frame 10.

[0170] In the above technical solution, by setting the first surface 31 and the second surface 32, the buffer structure 30 and the battery cell 20 can be in surface contact, and the buffer structure 30 and the frame 10 can also be in surface contact. When the battery cell 20 moves along the first direction, the battery cell 20 and the buffer structure 30 can be evenly stressed, reducing the stress concentration on the battery cell 20 and the buffer structure 30.

[0171] According to some embodiments of the present application, as shown in FIG. 7 and FIG. 10 , the buffer structure 30 has a through hole 33 therein.

[0172] The through holes 33 absorb compressive deformation. When the battery cells 20 expand and move along the stacking direction, the provision of through holes 33 facilitates compression of the buffer structure 30, allowing the buffer structure 30 to better absorb the expansion force. Furthermore, the provision of through holes 33 reduces the weight of the buffer structure 30, facilitating a lightweight design for the battery 100. This also reduces the material used to produce the buffer structure 30, thereby lowering the production cost of the buffer structure 30 and, consequently, the battery 100.

[0173] According to some embodiments of the present application, as shown in FIG. 7 and FIG. 10 , there are multiple through holes 33 .

[0174] When the battery cells 20 expand and move along the stacking direction, the provision of multiple through-holes 33 facilitates compression of the buffer structure 30, allowing it to better absorb the expansion force. Furthermore, the provision of multiple through-holes 33 further reduces the weight of the buffer structure 30, further facilitating a lightweight design for the battery 100. Furthermore, the material used in producing the buffer structure 30 can be further reduced, further reducing the production cost of the buffer structure 30 and, consequently, the battery 100.

[0175] According to some embodiments of the present application, as shown in FIG. 7 and FIG. 10 , the through hole is a strip-shaped structure and extends along a second direction perpendicular to the first direction.

[0176] The through hole 33 is a strip-shaped structure, which can also be understood as a long strip-shaped hole. The through hole 33 has a certain length and is arranged to extend along a second direction perpendicular to the first direction, as shown in Figures 7 and 10. The second direction can be the Y direction or the Z direction in Figures 7 and 10. This application uses the second direction as the Y direction in Figures 7 and 10 as an example for description. As an example, the through hole 33 extends in the second direction to the end of the buffer structure 30.

[0177] In the above technical solution, by extending the through hole 33 along the second direction, the setting area of ​​the through hole 33 can be increased, which is more conducive to the compression of the buffer structure 30, so that the buffer structure 30 can better absorb the expansion force, and can further reduce the weight of the buffer structure 30, which is more conducive to achieving a lightweight design of the battery 100.

[0178] According to some embodiments of the present application, as shown in FIG. 9 and FIG. 10 , the plurality of through holes 33 are parallel to each other.

[0179] Among them, multiple through holes 33 can all extend along the second direction, and any two through holes 33 are parallel to each other. In the above technical solution, by setting multiple through holes 33 parallel to each other, the structural strength of each area position of the buffer structure 30 can be made roughly the same. When the buffer structure 30 is squeezed, the compression amount of each area position of the buffer structure 30 is made roughly the same.

[0180] According to some embodiments of the present application, the plurality of through holes 33 are arranged at intervals along a third direction perpendicular to the first direction, and the second direction is perpendicular to the third direction.

[0181] As shown in Figures 7 and 10, the third direction can be the Y direction or the Z direction in Figures 7 and 10. If the second direction is the Y direction in Figure 7, the third direction is the Z direction in Figure 7. If the second direction is the Z direction in Figure 7, the third direction is the Y direction in Figure 7. This application uses the second direction as the Y direction in Figures 7 and 10 and the third direction as the Z direction in Figures 7 and 10 as an example for description. As an example, multiple through holes 33 are arranged in sequence along the third direction, and the spacing distance between any two adjacent through holes 33 is the same.

[0182] In the above technical solution, by arranging multiple through holes 33 spaced apart along the third direction, the structural strength of each area of ​​the buffer structure 30 can be further made roughly the same. When the buffer structure 30 is squeezed, the compression amount of each area of ​​the buffer structure 30 is roughly the same.

[0183] According to some embodiments of the present application, the cross-sectional shape of the through hole 33 is circular or polygonal.

[0184] It should be noted that the through hole 33 is configured as a hole with a circular cross-section, or the through hole 33 is configured as a hole with a polygonal cross-section, and the polygon can be a triangle, a quadrilateral, a pentagon, an I-shape, or the like.

[0185] In the above technical solution, by setting the cross-sectional shape of the through hole 33 to be circular or polygonal, the through hole 33 can better absorb compressive deformation and reduce the stress on the battery cell 20 and the frame 10 .

[0186] According to some embodiments of the present application, as shown in Figures 10 and 11, the buffer structure 30 has a first surface 31 and a second surface 32 opposite to each other along a first direction, the cross-sectional shape of the through hole 33 is a long strip, and the through hole 33 is located between the first surface 31 and the second surface 32. From the first surface 31 to the second surface 32, the through hole 33 is arranged obliquely between the first surface 31 and the second surface 32.

[0187] The first surface 31 can be a plane or a surface with certain convex and concave shapes, and the second surface 32 can be a plane or a surface with certain convex and concave shapes. This application uses the example of both the first surface 31 and the second surface 32 being planes for illustration. The through hole 33 is located between the first surface 31 and the second surface 32, and is arranged obliquely between the first surface 31 and the second surface 32 from the first surface 31 to the second surface 32.

[0188] In the above technical solution, the through holes 33 are arranged obliquely between the first surface 31 and the second surface 32 , which facilitates the compression of the buffer structure 30 when the battery cell 20 expands.

[0189] According to some embodiments of the present application, as shown in Figure 11, the cross-section of the through hole 33 has the longest hole side wall 34 opposite to the first surface 31, and the angle formed between the hole side wall 34 and the first surface 31 or the second surface 32 is α, satisfying the relationship: 40°≤α≤50°.

[0190] The through hole 33 has a sidewall 34 opposite the first surface 31. The sidewall 34 may be a plane. The angle α formed between the sidewall 34 and the first surface 31 or the second surface 32 satisfies the relationship: 40°≤α≤50°. This application uses the angle α formed between the sidewall 34 and the first surface 31 as an example for illustration. α can be set to values ​​such as 40°, 45°, or 50°.

[0191] In the above technical solution, by setting 40°≤α≤50°, when the battery cell 20 expands, it is more conducive to the compression of the buffer structure 30, and when the volume of the battery cell 20 decreases, it is convenient for the buffer structure 30 to rebound and return to its original shape.

[0192] According to some embodiments of the present application, as shown in FIG. 10 , the height of the end of the through hole 33 close to the first surface 31 is lower than the height of the end of the through hole 33 close to the second surface 32 , and the first surface 31 is used to abut the battery cell 20 .

[0193] As shown in FIG10 , the end of the elongated through hole 33 near the first surface 31 is set at a height that is higher or lower than the end of the elongated through hole 33 near the second surface 32. When the buffer structure 30 is assembled in the battery 100, the first surface 31 of the buffer structure 30 is positioned opposite the battery cell 20 at the end, and the second surface 32 of the buffer structure 30 is positioned opposite the frame 10. Because the lower end of the through hole 33 is positioned near the first surface 31 and the upper end of the through hole 33 is positioned near the second surface 32, when the battery cell 20 expands, the buffer structure 30 is compressed, causing the battery cell 20 to tend to move downward, thereby reducing the risk of the battery cell 20 moving upward.

[0194] According to some embodiments of the present application, as shown in Figures 12 and 13, the buffer structure 30 has a first surface 31 and a second surface 32 opposite to each other along a first direction, and the first surface 31 or the second surface 32 is provided with a supporting boss 35, which abuts against the adjacent battery cell 20 or frame 10.

[0195] Among them, the first surface 31 or the second surface 32 is provided with a supporting boss 35, and the supporting boss 35 abuts against the adjacent battery cell 20 or the frame 10. It should be noted that when the first surface 31 is provided with a supporting boss 35, the buffer structure 30 is assembled in the battery 100, and the supporting boss 35 abuts against the battery cell 20 at the end. When the second surface 32 is provided with a supporting boss 35, the buffer structure 30 is assembled in the battery 100, and the supporting boss 35 abuts against the frame 10. This application is explained by taking the second surface 32 provided with the supporting boss 35 as an example. Among them, after the buffer structure 30 is assembled in the battery 100, the first surface 31 is in surface contact with the battery cell 20, and the supporting boss 35 abuts against the frame 10.

[0196] In the above technical solution, by providing a support boss 35 on the first surface 31 or the second surface 32, when the battery cell 20 moves along the first direction, it is beneficial for the buffer structure 30 to deform. The buffer structure 30 is assembled in the battery 100, and the support boss 35 abuts against the frame 10, which can reduce the abutment area between the frame 10 and the buffer structure 30, and can reduce the wear of the frame 10 and the buffer structure 30. If the support boss 35 abuts against the battery cell 20, the abutment area between the battery cell 20 and the buffer structure 30 can be reduced, and the wear of the battery cell 20 and the buffer structure 30 can be reduced.

[0197] According to some embodiments of the present application, as shown in FIG. 12 and FIG. 13 , there are multiple supporting bosses 35 .

[0198] The provision of a plurality of supporting bosses 35 facilitates deformation of the buffer structure 30 when the battery cell 20 moves along the first direction.

[0199] According to some embodiments of the present application, as shown in FIG12 , at least two supporting bosses 35 are configured as strip-shaped bosses parallel to each other.

[0200] As shown in FIG12 , the cross-section of the support boss 35 is triangular, but the present application is not limited thereto, and the cross-sectional shape of the support boss 35 may also be other shapes. By way of example, the plurality of support bosses 35 are arranged along the Y direction in FIG12 , which can also be understood as the plurality of support bosses 35 extending along the second direction and being parallel to each other. By way of example, the plurality of support bosses 35 are spaced apart in sequence along the third direction.

[0201] In the above technical solution, by constructing at least two supporting bosses 35 as strip bosses parallel to each other, the structural strength of each area of ​​the buffer structure 30 can be roughly the same. When the buffer structure 30 is squeezed, the buffer structure 30 is subjected to uniform force, so that the compression amount of each area of ​​the buffer structure 30 is roughly the same.

[0202] According to some embodiments of the present application, the compressive deformation of the buffer structure 30 is A, which satisfies the relationship: 10%≤A≤60%.

[0203] The thickness of the buffer structure 30 when uncompressed is d1, and the thickness of the buffer structure 30 when compressed is d2. The compressive deformation A of the buffer structure 30 is calculated using the formula (d1-d2) / d1, where 10%≤A≤60%. For example, A is 10%, 20%, 30%, 40%, 50%, 60%, etc. The test method for d1 can be to disassemble the battery 100, remove the buffer structure 30 from the battery 100, and measure the thickness of the buffer structure 30 when uncompressed. The test method for d2 can be to assemble the buffer structure 30 into the battery 100, complete the assembly of the battery 100, and measure the thickness of the buffer structure 30 when compressed during the charge and discharge process. It should be noted that when the battery 100 is fully charged, the expansion force on the buffer structure 30 is the greatest, and the compressive deformation of the buffer structure 30 is the greatest. When the battery 100 is fully discharged, the compressive deformation of the buffer structure 30 is the smallest.

[0204] In the above technical solution, by setting 10%≤A≤60%, it is possible to prevent the buffer structure 30 from being over-compressed, and the buffer structure 30 can rebound after being compressed.

[0205] According to some embodiments of the present application, the material of the buffer structure 30 includes one or more of a polymer rubber member, a polyurethane foam member, a pine elastic board, or fiber cotton.

[0206] Among them, the manufacturing material of the buffer structure 30 is at least one of polymer rubber parts, polyurethane foam parts, pine elastic plates, and fiber cotton. When the manufacturing material of the buffer structure 30 is multiple of polymer rubber parts, polyurethane foam parts, pine elastic plates, and fiber cotton, multiple materials can be stacked to form the buffer structure 30.

[0207] In the above technical solution, by setting the manufacturing material of the buffer structure 30 to at least one of polymer rubber parts, polyurethane foam parts, pine elastic plates, and fiber cotton, the buffer structure 30 can be made compressible and elastic, and the buffer structure 30 can rebound after being compressed.

[0208] According to some embodiments of the present application, the plurality of battery cells 20 are movable along a first direction.

[0209] When the battery cells 20 expand, they are subjected to the expansion and compression force, causing the multiple battery cells 20 to move in the first direction. In the above technical solution, the battery cells 20 can move in the first direction after being subjected to the expansion and compression force, and the buffer structure 30 is compressed to absorb the expansion force. Compared with the prior art, this can further reduce the expansion and compression force on the battery cells 20, further reducing the risk of the battery cells 20 being crushed. It can also reduce the compression force on the frame 10, greatly reducing the risk of deformation of the frame 10, thereby improving the reliability of the battery 100 and increasing the cycle life of the battery 100.

[0210] According to some embodiments of the present application, the frame 10 and the plurality of battery cells 20 are guided and matched so that the plurality of battery cells 20 can move along a first direction.

[0211] Among them, when the battery cell 20 expands, the battery cell 20 is subjected to the expansion force. Under the action of the expansion force, the two battery cells 20 move away from each other. During the movement of the battery cell 20, the frame 10 cooperates with the guidance of multiple battery cells 20 to enable the battery cell 20 to move along the stacking direction of the battery cell 20, thereby reducing the risk of the battery cell 20 being offset.

[0212] According to some embodiments of the present application, as shown in Figures 3-5, the frame 10 includes: a first end limiter 11 and a second end limiter 12. In a first direction, the first end limiter 11 and the second end limiter 12 are respectively located at both ends of the battery cell 20, and multiple battery cells 20 are located between the first end limiter 11 and the second end limiter 12.

[0213] As an example, the first end stopper 11 and the second end stopper 12 can both be configured as flat plates, but the present application is not limited thereto. The specific structural shapes of the first end stopper 11 and the second end stopper 12 can be reasonably selected based on actual usage needs. For example, at least one of the first end stopper 11 and the second end stopper 12 can be configured as a stopper rod. A buffer structure 30 is provided between the first end stopper 11 and the adjacent battery cell 20, and between the second end stopper 12 and the adjacent battery cell 20.

[0214] In the above technical solution, by providing the first end stopper 11 and the second end stopper 12 , the first end stopper 11 and the second end stopper 12 can stop the battery cell 20 in the first direction.

[0215] According to some embodiments of the present application, the frame 10 also includes: a guide limit member 13, which is connected between the first end limit member 11 and the second end limit member 12 to fix the first end limit member 11 and the second end limit member 12 to be fixedly connected, and the guide limit member 13 is guided and cooperated with multiple battery cells 20 so that the battery cells 20 can move along the first direction.

[0216] The first end stopper 11 and the second end stopper 12 are fixedly connected by a guide stopper 13. The guide stopper 13 guides and cooperates with the multiple battery cells 20. During the movement of the battery cells 20, the battery cells 20 can move along the first direction, reducing the risk of the battery cells 20 shifting due to the expansion force. It should be noted that the specific structure of the guide stopper 13 can be appropriately configured based on actual usage, as long as the guide stopper 13 guides and cooperates with the battery cells 20 to allow the battery cells 20 to move along the stacking direction.

[0217] According to some embodiments of the present application, the guide limit plate 13 includes: a first limit plate, a second limit plate, a third limit plate and a fourth limit plate. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all connected between the first end limit plate 11 and the second end limit plate 12 and are located on the outside of the battery cell 20. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are respectively opposite to different surfaces of the battery cell 20, and the first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all abutted against the battery cell 20 for limitation.

[0218] As an example, one end of the first limiting plate, one end of the second limiting plate, one end of the third limiting plate and one end of the fourth limiting plate are all connected to the first end limiting member 11, and the other end of the first limiting plate, the other end of the second limiting plate, the other end of the third limiting plate and the other end of the fourth limiting plate are all connected to the second end limiting member 12. The first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate are all plate-shaped structures. The first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate are all extended along the first direction. Among them, as shown in Figure 3, taking the placement direction of the battery 100 in Figure 3 as an example, the first limiting plate can be arranged opposite to the upper surface of the battery cell 20, the second limiting plate can be arranged opposite to the lower surface of the battery cell 20, and the third limiting plate and the fourth limiting plate are respectively arranged opposite to the two side surfaces of the battery cell 20. The first limiting plate, the second limiting plate, the third limiting plate and the fourth limiting plate simultaneously limit and guide the battery cell 20 . When the battery cell 20 moves due to the expansion force, the battery cell 20 can be moved along the stacking direction of the battery cells 20 .

[0219] According to some embodiments of the present application, as shown in Figures 3, 4, 5 and 16, the guide limit member 13 includes: a limit slide rail 14, the limit slide rail 14 defines a guide space 141, the limit slide rail 14 is connected between the first end limit member 11 and the second end limit member 12, and the shoulders 21 of multiple battery cells 20 are assembled in the guide space 141 so that the battery cells 20 abut against the limit slide rail 14 for limitation.

[0220] The limiting slide rail 14 extends along the stacking direction of the battery cells 20. One end of the limiting slide rail 14 is connected to the first end limit member 11, and the other end of the limiting slide rail 14 is connected to the second end limit member 12. As shown in Figure 19, the battery cell 20 has a side surface and two end surfaces. The side surface is connected between the two end surfaces. The side surface has a large surface and a narrow surface. The connection between the narrow surface and the two end surfaces forms a shoulder 21 of the battery cell 20. Taking the square battery cell 20 in Figure 19 as an example, the square battery cell 20 has four shoulders 21. In the above technical solution, after the battery 100 is assembled, the shoulder 21 of the battery cell 20 is assembled in the guide space 141. When the battery cell 20 abuts the limiting slide rail 14, the limiting slide rail 14 can limit the movement of the battery cell 20 so that the battery cell 20 can only move in the stacking direction.

[0221] According to some embodiments of the present application, as shown in FIG. 3 to FIG. 5 , there are multiple limiting slide rails 14 , and at least two shoulders 21 of each battery cell 20 are correspondingly provided with limiting slide rails 14 , and the shoulders 21 are located in corresponding guide spaces 141 .

[0222] Among them, the number of limiting slide rails 14 is greater than or equal to two, for example: the two shoulders 21 located below the battery cell 20 are respectively provided with a limiting slide rail 14, or the two diagonally opposite shoulders 21 on the battery cell 20 are respectively provided with a limiting slide rail 14, or each shoulder 21 of the battery cell 20 is correspondingly provided with a limiting slide rail 14. This application takes the example of each shoulder 21 of the battery cell 20 being provided with a limiting slide rail 14, and the shoulder 21 of the battery cell 20 is located in the corresponding guide space 141.

[0223] As shown in FIG3 , four limiting slide rails 14 can be provided. There are four shoulders 21 of the battery cell 20 , and each of the four shoulders 21 of the battery cell 20 is provided with a corresponding limiting slide rail 14 .

[0224] In the above technical solution, when the battery cell 20 is moved by the expansion force, the battery cell 20 is guided at the same time by multiple limiting slide rails 14, so that the battery cell 20 can only move along the stacking direction of the battery cell 20, further reducing the risk of the battery cell 20 being offset. In addition, by supporting the battery cell 20 with multiple limiting slide rails 14, the battery cell 20 can be firmly installed in the frame 10.

[0225] According to some embodiments of the present application, as shown in Figure 6, the two shoulders 21 located below the battery cell 20 are respectively provided with a limiting slide rail 14 to form an exhaust gap 142 between the two limiting slide rails 14, and the exhaust gap 142 is opposite to the explosion-proof valve 23 of the battery cell 20.

[0226] As shown in Figures 3 and 6, the two shoulders 21 below the battery cell 20 are respectively provided with a limiting slide rail 14, and an exhaust gap 142 is formed between the two limiting slide rails 14 corresponding to the two shoulders 21 below the battery cell 20. The exhaust gap 142 is located below the battery cell 20, and the explosion-proof valve 23 of the battery cell 20 is set downward, and the explosion-proof valve 23 of the battery cell 20 is set corresponding to the exhaust gap 142. When thermal runaway occurs in the battery cell 20, the explosion-proof valve 23 opens, and the exhaust gap is conducive to the faster discharge of the material ejected from the explosion-proof valve 23 from the battery cell 20, which is conducive to the excretion of the battery 100.

[0227] According to some embodiments of the present application, the battery 100 includes: a tray, the tray is used to support the battery cell 20, the battery cell 20 is installed on the tray, and the tray is provided with an exhaust gap 142. When the battery cell 20 has thermal runaway, the explosion-proof valve 23 opens, and the material ejected from the explosion-proof valve 23 is discharged from the battery 100 through the exhaust gap 142, which is conducive to the excretion of the battery 100.

[0228] According to some embodiments of the present application, as shown in Figures 15 and 16, the limiting slide rail 14 includes: a first plate body 143 and a second plate body 144, the first plate body 143 and the second plate body 144 are connected, and an angle is formed between the first plate body 143 and the second plate body 144 so that the limiting slide rail 14 defines a guide space 141.

[0229] The first plate 143 and the second plate 144 are fixedly connected, and the first plate 143 and the second plate 144 can be integrally formed. The angle formed between the first plate 143 and the second plate 144 can be an acute angle, an obtuse angle, or a right angle, as long as the angle is formed between the first plate 143 and the second plate 144. The angle between the first plate 143 and the second plate 144 can be specifically set according to actual needs.

[0230] In the above technical solution, by forming an angle between the first plate 143 and the second plate 144 , the limiting slide rail 14 can define the guide space 141 , and the structure of the limiting slide rail 14 can be reasonably set.

[0231] According to some embodiments of the present application, the first plate 143 and the second plate 144 are perpendicular.

[0232] It should be noted that the first plate 143 and the second plate 144 are approximately perpendicular, or the first plate 143 and the second plate 144 are completely perpendicular. The limiting slide rail 14 is constructed as an "L"-shaped structure. At the shoulder 21 of the battery cell 20, since the narrow surface and end surface of the battery cell 20 are relatively flat, the narrow surface and the end surface are approximately perpendicular or vertical. By vertically arranging the first plate 143 and the second plate 144, after the limiting slide rail 14 and the battery cell 20 are assembled, the first plate 143 and the second plate 144 can reliably limit the battery cell 20, thereby improving the reliability of the battery 100.

[0233] According to some embodiments of the present application, as shown in FIG. 6 , the first plate 143 abuts against the end surface of the battery cell 20 for position limiting, and the second plate 144 abuts against the side surface of the battery cell 20 for position limiting.

[0234] Among them, the end faces of the battery cell 20 are the upper end face and the lower end face in the Z direction in Figure 6, the first plate body 143 of the limiting slide rail 14 set corresponding to the upper end face and the upper end face of the battery cell 20 are abutted and limited, and the first plate body 143 of the limiting slide rail 14 set corresponding to the lower end face and the lower end face of the battery cell 20 are abutted and limited, and the side faces of the battery cell 20 are the two side faces in the Y direction in Figure 6, and the second plate body 144 of the limiting slide rail 14 set corresponding to the corresponding side faces and the corresponding side faces of the battery cell 20 are abutted and limited.

[0235] In the above technical solution, by abutting and limiting the end face of the battery cell 20 with the first plate 143 and abutting and limiting the side face of the battery cell 20 with the second plate 144, each limiting slide rail 14 can limit the battery cell 20 in the Y direction and the Z direction, thereby better improving the reliability of the battery 100.

[0236] According to some embodiments of the present application, as shown in Figures 17 and 18, the battery 100 also includes: an electrical connector 40, the electrical connector 40 includes a first connecting portion 41, a second connecting portion 42 and an elastic segment 43, the first connecting portion 41 and the second connecting portion 42 are respectively connected to the electrode terminals 22 of the corresponding battery cells 20, and the elastic segment 43 is connected between the first connecting portion 41 and the second connecting portion 42.

[0237] The electrical connector 40 is a metal component that is connected between two battery cells 20 to achieve electrical connection between the two battery cells 20. The first connecting portion 41 is connected to the electrode terminal 22 of one of the two electrically connected battery cells 20, and the second connecting portion 42 is connected to the electrode terminal 22 of one of the two electrically connected battery cells 20 to achieve electrical connection between the two battery cells 20.

[0238] As an example, as shown in Figures 17 and 18, the first connecting portion 41 has a first connecting area 411, which is connected to the electrode terminal 22 of the battery cell 20, for example, by welding the first connecting area 411 to the electrode terminal 22. The second connecting portion 42 has a second connecting area 421, which is connected to the electrode terminal 22 of the battery cell 20, for example, by welding the second connecting area 421 to the electrode terminal 22. Because the electrical connector 40 is connected between two battery cells 20, when the battery cells 20 move in the stacking direction, if the electrical connector 40 lacks elasticity, the connection between the electrical connector 40 and the electrode terminal may tear or break.

[0239] In the present application, an elastic segment 43 is connected between the first connecting portion 41 and the second connecting portion 42. The elastic segment 43 has a certain degree of elasticity. When the battery cell 20 moves in the first direction, the elastic segment 43 extends, reducing the risk of tearing or disconnecting the connection between the electrical connector 40 and the electrode terminal 22, improving the reliability of the connection between the electrical connector 40 and the electrode terminal 22, and enhancing the operational reliability of the battery 100. When the battery cell 20 is not subjected to expansion force, the elastic force of the buffer structure 30 can cause the battery cell 20 to move in the return direction, and the elastic segment 43 can recover its elastic deformation.

[0240] According to some embodiments of the present application, as shown in Figure 17, the elastic segment 43 has a first connecting segment 431, a second connecting segment 432 and a third connecting segment 433, the first connecting segment 431 is connected between the second connecting segment 432 and the first connecting portion 41, and the third connecting segment 433 is connected between the second connecting segment 432 and the second connecting portion 42.

[0241] Among them, after the first connecting section 431 is connected between the second connecting section 432 and the first connecting part 41, the second connecting section 432 and the first connecting part 41 are separated, and a gap is formed between the second connecting section 432 and the first connecting part 41; after the third connecting section 433 is connected between the second connecting section 432 and the second connecting part 42, the second connecting section 432 and the second connecting part 42 are separated, and a gap is formed between the second connecting section 432 and the second connecting part 42, which can make the elastic section 43 elastic and the elastic section 43 can be stretched and retracted.

[0242] According to some embodiments of the present application, as shown in FIG. 17 , a dimension of the second connecting segment 432 in a width direction of the electrical connector 40 is greater than a dimension of the second connecting segment 432 in a length direction of the electrical connector 40 .

[0243] Among them, by making the second connecting section 432 in the width direction of the electrical connector 40 larger than the second connecting section 432 in the length direction of the electrical connector 40 L1, the second connecting section 432 is extended in the width direction of the electrical connector 40. After the first connecting section 431 is connected between the second connecting section 432 and the first connecting part 41 and the third connecting section 433 is connected between the second connecting section 432 and the second connecting part 42, the elastic section 43 can be made elastic, so that the electrical connector 40 has retractable properties.

[0244] According to some embodiments of the present application, as shown in Figure 17, the dimension of the first connecting segment 431 in the width direction of the electrical connector 40 is smaller than the dimension of the first connecting segment 431 in the length direction of the electrical connector 40 and / or the dimension of the third connecting segment 433 in the width direction of the electrical connector 40 is smaller than the dimension of the third connecting segment 433 in the length direction of the electrical connector 40.

[0245] Among them, the dimension L3 of the first connecting section 431 in the width direction of the electrical connector 40 is smaller than the dimension L4 of the first connecting section 431 in the length direction of the electrical connector 40, or the dimension L5 of the third connecting section 433 in the width direction of the electrical connector 40 is smaller than the dimension L6 of the third connecting section 433 in the length direction of the electrical connector 40, or the dimension L3 of the first connecting section 431 in the width direction of the electrical connector 40 is smaller than the dimension L4 of the first connecting section 431 in the length direction of the electrical connector 40 and the dimension L5 of the third connecting section 433 in the width direction of the electrical connector 40 is smaller than the dimension L6 of the third connecting section 433 in the length direction of the electrical connector 40. This application is explained by taking the example that the dimension of the first connecting section 431 in the width direction of the electrical connector 40 is smaller than the dimension of the first connecting section 431 in the length direction of the electrical connector 40 and the dimension of the third connecting section 433 in the width direction of the electrical connector 40 is smaller than the dimension of the third connecting section 433 in the length direction of the electrical connector 40.

[0246] Furthermore, by making the dimension of the first connecting segment 431 in the width direction of the electrical connector 40 smaller than the dimension of the first connecting segment 431 in the length direction of the electrical connector 40, the first connecting segment 431 is extended in the length direction of the electrical connector 40, which can further make the elastic segment 43 elastic and improve the telescopic performance of the electrical connector 40. Furthermore, by making the dimension of the third connecting segment 433 in the width direction of the electrical connector 40 smaller than the dimension of the third connecting segment 433 in the length direction of the electrical connector 40, the third connecting segment 433 is extended in the length direction of the electrical connector 40, which further improves the telescopic performance of the electrical connector 40 and is more conducive to the telescopic performance of the electrical connector 40.

[0247] According to some embodiments of the present application, as shown in Figure 18, the second connecting section 432 includes: multiple first segments 4321 and at least one second segment 4322, the multiple first segments 4321 are spaced apart in sequence in the length direction of the electrical connector 40, and a second segment 4322 is connected between any two adjacent first segments 4321.

[0248] The number of first segments 4321 provided is greater than or equal to two, for example, the number of first segments 4321 provided is two, three, or four. This application uses the example of two first segments 4321 and one second segment 4322 as an example. The second segment 4322 is connected between the two first segments 4321, one of the two first segments 4321 is connected to the first connecting segment 431, and the other of the two first segments 4321 is connected to the third connecting segment 433.

[0249] In the above technical solution, by providing multiple first segments 4321 and at least one second segment 4322 , the elastic segment 43 can be made elastic, and the electrical connector 40 can be made retractable, thereby reducing the risk that the electrical connector 40 cannot be retracted when the battery cell 20 moves.

[0250] According to some embodiments of the present application, at least one first segment 4321 has a larger dimension in the width direction of the electrical connector 40 than the first segment 4321 has in the length direction of the electrical connector 40, and the second segment 4322 has a smaller dimension in the width direction of the electrical connector 40 than the second segment 4322 has in the length direction of the electrical connector 40.

[0251] In this application, the dimension L7 of the plurality of first segments 4321 in the width direction of the electrical connector 40 is greater than the dimension L8 of the first segment 4321 in the length direction of the electrical connector 40. By making the dimension L7 of the first segment 4321 in the width direction of the electrical connector 40 greater than the dimension L8 of the first segment 4321 in the length direction of the electrical connector 40, and the dimension L9 of the second segment 4322 in the width direction of the electrical connector 40 is smaller than the dimension L10 of the second segment 4322 in the length direction of the electrical connector 40, the plurality of first segments 4321 are extended in the width direction of the electrical connector 40, and the second segments 4322 are extended in the length direction of the electrical connector 40, the elastic segment 43 can be made elastic, and the electrical connector 40 can be made retractable, thereby reducing the risk that the electrical connector 40 cannot be retracted when the battery cell 20 moves.

[0252] According to some embodiments of the present application, at least two first segments 4321 are parallel to each other.

[0253] The plurality of first segments 4321 extend in the width direction of the electrical connector 40. For example, the plurality of first segments 4321 are parallel to each other. By having at least two first segments 4321 parallel to each other, the second connecting segment 432 can be configured as a bent structure, which can increase the elasticity of the second connecting segment 432 and, therefore, the elasticity of the electrical connector 40.

[0254] According to some embodiments of the present application, in the length direction of the electrical connector 40 , the second segment 4322 located at the outermost end is staggered with the adjacent first connecting segment 431 and / or third connecting segment 433 in the width direction of the electrical connector 40 .

[0255] In which, in the length direction of the electrical connector 40, the second segment 4322 located at the end is staggered with the adjacent first connecting segment 431 or the third connecting segment 433 in the width direction of the electrical connector 40, or in the length direction of the electrical connector 40, the second segment 4322 located at the end is staggered with the adjacent first connecting segment 431 and the third connecting segment 433 in the width direction of the electrical connector 40.

[0256] In the above technical solution, by staggering the second segment 4322 at the outermost end with the adjacent first connecting segment 431 and / or third connecting segment 433 in the width direction of the electrical connector 40, the elasticity of the electrical connector 40 can be further increased, making it easier for the electrical connector 40 to expand and contract.

[0257] According to some embodiments of the present application, in the width direction of the electrical connector 40 , the first connecting section 431 and the third connecting section 433 are staggered.

[0258] By staggering the first connecting section 431 and the third connecting section 433 in the width direction of the electrical connector 40, the elastic section 43 can be made elastic and have telescopic properties, which is conducive to deformation of the elastic section 43 and further prevents the electrical connector 40 from being disconnected from the corresponding electrode terminal.

[0259] According to some embodiments of the present application, as shown in FIG. 18 , in the length direction of the electrical connector 40 , the first connecting section 431 and the third connecting section 433 correspond to each other.

[0260] As shown in Figure 18, the example of two first segments 4321 and one second segment 4322 is used for illustration. When two first segments 4321 are provided, with one second segment 4322 connected between the two first segments 4321, if the first connecting segment 431 and the third connecting segment 433 are staggered in the width direction of the electrical connector 40, that is, the first connecting segment 431 and the third connecting segment 433 do not correspond in the length direction of the electrical connector 40, the deformation of the elastic segment 43 is small, resulting in a small amount of expansion and contraction of the electrical connector 40. However, by arranging the first connecting segment 431 and the third connecting segment 433 in correspondence in the length direction of the electrical connector 40, the deformation of the elastic segment 43 can be increased, thereby improving the expandability of the electrical connector 40.

[0261] According to some embodiments of the present application, the elastic section 43 may be configured as a spiral structure.

[0262] In this embodiment, the elastic section 43 may be configured to be similar to a coil spring shape, so that the elastic section 43 has elasticity and is stretchable, thereby making the electrical connector 40 stretchable.

[0263] According to some embodiments of the present application, the first connection part 41, the second connection part 42 and the elastic segment 43 are integrally formed. In this technical solution, by integrally forming the first connection part 41, the second connection part 42 and the elastic segment 43, the connection strength between the first connection part 41, the second connection part 42 and the elastic segment 43 can be improved, and the elastic segment 43 can be prevented from separating from the first connection part 41 and the second connection part 42. In addition, there is no need to produce the electrical connector 40 separately, which can reduce the number of molds developed and reduce manufacturing costs.

[0264] According to some embodiments of the present application, as shown in Figures 17 and 18, the elastic segment 43 has a plurality of notched grooves 434, and the plurality of notched grooves 434 penetrate the elastic segment 43 in the thickness direction of the elastic segment 43. The plurality of notched grooves 434 are spaced apart in sequence in the length direction of the electrical connector 40, and at least one notched groove 434 extends to a side edge of the elastic segment 43 in the width direction of the electrical connector 40.

[0265] As shown in Figures 17 and 18 , the electrical connector 40 includes a first connecting portion 41, a second connecting portion 42, and an elastic segment 43. The first connecting portion 41 and the second connecting portion 42 are respectively connected to the electrode terminals 22 of the corresponding battery cells 20. The elastic segment 43 is connected between the first connecting portion 41 and the second connecting portion 42. The elastic segment 43 has a plurality of notches 434. The plurality of notches 434 penetrate the elastic segment 43 in the thickness direction of the elastic segment 43. The plurality of notches 434 are sequentially spaced along the length of the electrical connector 40, and at least one notch 434 extends to a side edge of the elastic segment 43 in the width direction of the electrical connector 40. The provision of the plurality of notches 434 makes the elastic segment 43 elastic. When the battery cells 20 move, the elastic segment 43 expands and contracts, reducing the risk of tearing or disconnection at the connection between the electrical connector 40 and the electrode terminals of the corresponding battery cells 20.

[0266] According to some embodiments of the present application, notch grooves 434 are provided on both sides of the elastic section 43 in the width direction of the electrical connector 40 .

[0267] As shown in FIG. 17 and FIG. 18 , notches 434 are provided on both side edges of the elastic section 43 in the width direction of the electrical connector 40 . This arrangement enables the electrical connector 40 to be retractable and improves the working performance of the electrical connector 40 .

[0268] According to some embodiments of the present application, a dimension of each notch groove 434 in the width direction of the electrical connector 40 is greater than a dimension of the notch groove 434 in the length direction of the electrical connector 40 .

[0269] By making the notch groove 434 in the width direction of the electrical connector 40 larger than the notch groove 434 in the length direction of the electrical connector 40, the notch groove 434 is constructed as a long strip groove. The notch groove 434 can be set as a strip-shaped notch groove 434, which facilitates the deformation of the elastic section 43 when the first connecting part 41 and the second connecting part 42 are subjected to force.

[0270] It should be noted that the width direction of the electrical connector 40 is the front-to-back direction in FIG. 17 and FIG. 18 , and the length direction of the electrical connector 40 is the left-to-right direction in FIG. 17 and FIG. 18 .

[0271] The present application further provides an electric device 200 , which includes the battery 100 of the above embodiment. The battery 100 can be used to provide electric energy for the electric device 200 .

[0272] Some embodiments of the present application are described below with reference to FIG. 2 to FIG. 4 .

[0273] The battery 100 includes a frame 10, a buffer structure 30, and multiple battery cells 20. The buffer structure 30 is disposed between the frame 10 and the battery cells 20 at the ends. For example, the frame 10 includes a first end stopper 11, a second end stopper 12, and multiple limiting rails 14. The multiple battery cells 20 are disposed between the first end stopper 11 and the second end stopper 12. The buffer structure 30 is disposed between the first end stopper 11 and the battery cells 20 at the ends, and the buffer structure 30 is disposed between the second end stopper 12 and the battery cells 20 at the ends. The multiple limiting rails 14 are connected between the first end stopper 11 and the second end stopper 12 to securely assemble the first and second end stoppers 11 and 12. Furthermore, the multiple limiting rails 14 are respectively assembled with the shoulders 21 at different positions on the battery cells 20. The multiple limiting rails 14 can guide and limit the battery cells 20, allowing the battery cells 20 to move along the stacking direction of the battery cells 20.

[0274] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0275] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0276] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery comprising: frame; A plurality of battery cells, each of which is disposed within the frame and stacked along a first direction; A buffer structure is provided along the first direction between at least two adjacent battery cells and / or between the outermost battery cell and the frame.

2. The battery according to claim 1, wherein The buffer structure is provided between the outermost battery cell and the frame, and the buffer structure abuts against the adjacent battery cell and the frame.

3. The battery according to claim 1 or 2, wherein Along the first direction, the orthographic projection of the housing of the battery cell is located within the orthographic projection of the buffer structure.

4. The battery according to claim 2, wherein The buffer structure has a first surface and a second surface opposite to each other. The first surface and the second surface are respectively planes. The first surface and the second surface are in contact with the adjacent battery cells and the frame, respectively.

5. The battery according to any one of claims 1 to 4, wherein The buffer structure has a through hole therein.

6. The battery according to claim 5, wherein There are multiple through holes.

7. The battery according to claim 6, wherein The through hole is a strip-shaped structure and extends along a second direction perpendicular to the first direction.

8. The battery according to claim 7, wherein The plurality of through holes are parallel to each other.

9. The battery according to claim 7 or 8, wherein The plurality of through holes are arranged at intervals along a third direction perpendicular to the first direction, and the second direction is perpendicular to the third direction.

10. The battery according to any one of claims 5 to 9, wherein The cross-section of the through hole is circular or polygonal.

11. The battery according to any one of claims 1 to 10, wherein: The buffer structure has a through hole therein, and the buffer structure has a first surface and a second surface opposite to each other along the first direction. The cross-sectional shape of the through hole is a long strip. The through hole is located between the first surface and the second surface. From the first surface to the second surface, the through hole is arranged obliquely between the first surface and the second surface.

12. The battery according to claim 11, wherein The cross section of the through hole has the longest hole side wall opposite to the first surface, and the angle formed between the hole side wall and the first surface or the second surface is α, which satisfies the relationship: 40°≤α≤50°.

13. The battery according to claim 11, wherein The height of the end portion of the through hole close to the first surface is lower than the height of the end portion of the through hole close to the second surface, and the first surface is used to abut against the battery cell.

14. The battery according to any one of claims 1 to 3 and 5 to 13, wherein The buffer structure has a first surface and a second surface opposite to each other along the first direction. The first surface or the second surface is provided with a supporting boss, and the supporting boss abuts against the adjacent battery cell or the frame.

15. The battery according to claim 14, wherein There are multiple supporting bosses.

16. The battery according to claim 15, wherein At least two of the supporting bosses are configured as strip-shaped bosses parallel to each other.

17. The battery according to any one of claims 1 to 16, wherein The compressive deformation amount of the buffer structure is A, which satisfies the relationship: 10%≤A≤60%.

18. The battery according to any one of claims 1 to 17, wherein The material of the buffer structure includes one or more of polymer rubber parts, polyurethane foam parts, pine elastic boards or fiber cotton.

19. The battery according to any one of claims 1 to 18, wherein The plurality of battery cells are movable along the first direction.

20. The battery according to any one of claims 1 to 19, wherein The frame is guided and matched with the plurality of battery cells so that the plurality of battery cells can move along the first direction.

21. The battery according to any one of claims 1 to 20, wherein The frame includes: a first end limiter and a second end limiter. In the first direction, the first end limiter and the second end limiter are respectively located at both ends of the battery cell, and a plurality of the battery cells are located between the first end limiter and the second end limiter.

22. The battery according to claim 21, wherein The frame also includes: a guide limiter, which is connected between the first end limiter and the second end limiter so that the first end limiter and the second end limiter are fixedly connected, and the guide limiter cooperates with the guides of the plurality of battery cells so that the battery cells can move along the first direction.

23. The battery according to claim 22, wherein The guide limit plate includes: a first limit plate, a second limit plate, a third limit plate and a fourth limit plate. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all connected between the first end limit plate and the second end limit plate and are located on the outside of the battery cell. The first limit plate, the second limit plate, the third limit plate and the fourth limit plate are respectively opposite to different surfaces of the battery cell, and the first limit plate, the second limit plate, the third limit plate and the fourth limit plate are all in contact with the battery cell for limitation.

24. The battery according to claim 22, wherein The guide limit member includes: a limit slide rail, the limit slide rail defines a guide space, the limit slide rail is connected between the first end limit member and the second end limit member, and multiple battery cells are assembled in the guide space so that the battery cells abut against the limit slide rail for limitation.

25. The battery according to claim 24, wherein There are a plurality of limiting slide rails, and at least two shoulders of each battery cell are correspondingly provided with the limiting slide rails, and the shoulders are located in the corresponding guide spaces.

26. The battery according to claim 24 or 25, wherein The two shoulders below the battery cell are respectively provided with one limiting slide rail to form an exhaust gap between the two limiting slide rails, and the exhaust gap is opposite to the explosion-proof valve of the battery cell.

27. The battery according to any one of claims 24 to 26, wherein The limiting slide rails each include: a first plate and a second plate, the first plate and the second plate are connected, and an angle is formed between the first plate and the second plate so that the limiting slide rail defines the guide space.

28. The battery according to claim 27, wherein The first plate and the second plate are perpendicular.

29. The battery according to claim 27 or 28, wherein The first plate body abuts against the end surface of the battery cell to limit its position, and the second plate body abuts against the side surface of the battery cell to limit its position.

30. The battery according to any one of claims 1 to 29, wherein The battery further includes an electrical connector including a first connecting portion, a second connecting portion, and an elastic segment, wherein the first connecting portion and the second connecting portion are respectively connected to the electrode terminals of the corresponding battery cells, and the elastic segment is connected between the first connecting portion and the second connecting portion.

31. The battery according to claim 30, wherein The elastic section has a first connecting section, a second connecting section, and a third connecting section. The first connecting section is connected between the second connecting section and the first connecting portion, and the third connecting section is connected between the second connecting section and the second connecting portion.

32. The battery according to claim 31, wherein The dimension of the second connecting section in the width direction of the electrical connector is greater than the dimension of the second connecting section in the length direction of the electrical connector.

33. The battery according to claim 32, wherein The first connecting segment has a smaller dimension in the width direction of the electrical connector than the first connecting segment in the length direction of the electrical connector and / or the third connecting segment has a smaller dimension in the width direction of the electrical connector than the third connecting segment in the length direction of the electrical connector.

34. The battery according to claim 31, wherein The second connecting section includes: a plurality of first segments and at least one second segment. The plurality of first segments are sequentially spaced apart in the length direction of the electrical connector, and the second segment is connected between any two adjacent first segments.

35. The battery according to claim 34, wherein At least one of the first segments has a dimension in the width direction of the electrical connector that is larger than that of the first segment in the length direction of the electrical connector, and the dimension of the second segment in the width direction of the electrical connector is smaller than that of the second segment in the length direction of the electrical connector.

36. The battery according to claim 34 or 35, wherein At least two of the first segments are parallel to each other.

37. The battery according to any one of claims 34 to 36, wherein In the length direction of the electrical connector, the second segment located at the outermost end is staggered with the adjacent first connecting segment and / or the third connecting segment in the width direction of the electrical connector.

38. The battery according to any one of claims 31 to 37, wherein In the width direction of the electrical connector, the first connecting section and the third connecting section are staggered.

39. The battery according to any one of claims 31 to 37, wherein In the length direction of the electrical connector, the first connecting section and the third connecting section correspond to each other.

40. The battery according to claim 30, wherein The elastic section is configured as a spiral structure.

41. The battery according to any one of claims 30 to 40, wherein The first connecting portion, the second connecting portion and the elastic section are integrally formed.

42. The battery according to any one of claims 30 to 41, wherein The elastic segment has a plurality of notched grooves, which penetrate the elastic segment in the thickness direction of the elastic segment, are spaced apart in sequence in the length direction of the electrical connector, and at least one notched groove extends to a side edge of the elastic segment in the width direction of the electrical connector.

43. The battery according to claim 42, wherein The dimension of each notch in the width direction of the electrical connector is greater than the dimension of each notch in the length direction of the electrical connector.

44. The battery according to claim 42 or 43, wherein In the width direction of the electrical connector, the notch grooves are provided on both sides of the elastic section.

45. An electrical device, wherein: Comprising a battery according to any one of claims 1-44.

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