CN217158442U - Buffer piece, battery and power consumption device - Google Patents

Abstract

The application discloses bolster, battery and electric installation relates to battery technical field. Wherein, this bolster includes: the first member and the second member are oppositely arranged in a first direction and are spliced to form the buffer piece; the first member includes: the first body and the two first connecting parts are arranged at two end parts of the first body; the second member includes: the second body and two second connecting parts are arranged at two end parts of the second body; the first connecting portion and the second connecting portion are in concave-convex matching and clamping connection so as to fix the first component and the second component. This application technical scheme can be effectively split type blotter connect the poor problem of reliability.

Description

Buffer piece, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a buffer piece, a battery and an electric device.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

The battery generally includes a plurality of battery cells arranged side by side and end plates respectively located at two ends of the plurality of battery cells; during the use of the battery, the battery cells in the battery generate expansion force, and the excessive expansion force can cause the battery to be scattered.

At present, in order to alleviate the influence of the expansion force of the battery monomers on the battery, a buffer pad is usually added between two adjacent battery monomers, but the connection reliability of the existing split type buffer pad is poor, and the fixing mode is complicated.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application provides a battery cell, a battery and an electric device, which can solve the problem of poor connection reliability of a separate type cushion pad.

In a first aspect, the present application provides a buffer for a battery, comprising: the first member and the second member are oppositely arranged in a first direction and are spliced to form a buffer piece; the first member includes: the first body and the two first connecting parts are arranged at two end parts of the first body; the second member includes: the second main body and the two second connecting parts are arranged at the two end parts of the second main body; the first connecting portion and the second connecting portion are in concave-convex fit and clamped to fix the first member and the second member.

In the technical scheme of the embodiment of the application, the buffer part is formed by splicing a first member and a second member which are oppositely arranged, and the buffer part can absorb the assembly tolerance among single batteries in the assembly process by utilizing the elasticity of the buffer part, so that the assembly size precision of the whole battery can be ensured to the maximum extent; first component and second component set up first connecting portion and second connecting portion respectively and connect, and first connecting portion and second connecting portion realize spacing of all directions through the mode of unsmooth cooperation and joint to realize the reliable fixed of first component and second component, can improve the intensity and the reliability of bolster, and need not additionally adopt modes such as splice, simplified the fixed mode of first component and second component.

In some embodiments, the buffer comprises a hollow frame structure. When the buffer member is applied to the battery, the hollow part formed by splicing the first member and the second member can absorb the expansion force generated by the single battery in time, so that the buffer member meets the requirement of the expansion force of the single battery, and the service life of the battery is ensured; and the first member and the second member are independent structures and can be formed by using less materials, so that the overall structure of the buffering member is simple, the used materials are less, the cost can be reduced, and the resources are saved.

In some embodiments, the first connecting portion protrudes from the first body in a first direction; the second connecting part protrudes out of the second main body along the first direction; the first connecting part and the second connecting part have the same width in the second direction and are oppositely arranged in the third direction; the first direction, the second direction and the third direction are mutually vertical pairwise. In the bolster of this application embodiment, first connecting portion and second connecting portion can be outstanding respectively in first main part and second main part, and first connecting portion and second connecting portion set up relatively in the third direction, realize the cooperation joint through the concave-convex structure that sets up on first connecting portion and the second connecting portion.

In some embodiments, the surface of the first connecting portion opposite to the surface of the second connecting portion in the third direction is a first surface, and the first surface is provided with a first protrusion and a first groove in sequence along the first direction; the surface of the second connecting part, which is opposite to the first surface, is a second surface, and a second groove and a second bulge which are respectively matched with the first bulge and the first groove are sequentially arranged on the second surface; wherein, the first bulge is matched and clamped with the second groove, and/or the second bulge is matched and clamped with the first groove. According to the design, the first connecting part and the second connecting part can realize the limiting in at least the first direction through the matching of the first protrusion and the second groove and the matching of the second protrusion and the first groove, and realize the limiting in other directions through the matching of the first protrusion and the second groove and/or the matching of the second protrusion and the first groove.

In some embodiments, the first protrusion and the first groove are located between two edges of the first surface that are opposite in the second direction; the second protrusion and the second groove are located between two edges of the second surface facing in the second direction. According to the design, the first connecting part and the second connecting part can be limited in the first direction and the second direction simultaneously through the matching of the first protrusion and the second groove and the matching of the second protrusion and the first groove.

In some embodiments, the side wall of the first protrusion is provided with a convex or concave first clamping portion, the side wall of the second groove is provided with a concave or convex second clamping portion, and the first clamping portion and the second clamping portion are matched and clamped to limit the relative movement of the first clamping portion and the second clamping portion in the third direction; and/or, the bellied lateral wall of second is provided with protruding or bellied third joint portion, and the lateral wall of first recess is provided with sunken or bellied fourth joint portion, and third joint portion and fourth joint portion cooperation and joint to the relative motion of restriction two in the third direction. Such design can make first connecting portion and second connecting portion joint to realize first connecting portion and second connecting portion spacing in the third direction, thereby realize the reliable fixed of first component and second component.

In some embodiments, the first clamping portion and the second clamping portion have a triangular cross-sectional shape and include a first clamping surface and a second clamping surface, the first clamping surface is parallel to the first surface, and the second clamping surface is an inclined surface; the distance between the second clamping surface and the side surface of the first connecting part abutting against the second main body is gradually increased from one end of the second clamping surface, which is far away from the first surface, to one end of the second clamping surface, which is close to the first surface; wherein the cross-section is parallel to the first and third directions. In such design, can make the convenient joint of first joint portion and second joint portion, simplify the fixed mode of first component and second component, and can effectively restrict the relative motion of first connecting portion and second connecting portion in the third direction.

In some embodiments, the cross-sectional shapes of the third clamping portion and the fourth clamping portion are triangular, and include a third clamping surface and a fourth clamping surface, the third clamping surface is parallel to the first surface, and the fourth clamping surface is an inclined surface; the distance between the fourth clamping surface and the first connecting part and the first side surface of the second main body is gradually increased from one end of the fourth clamping surface close to the first surface to one end of the fourth clamping surface far away from the first surface; wherein the cross-section is parallel to the first and third directions. In such design, can make the convenient joint of third joint portion and fourth joint portion, simplify the fixed mode of first component and second component, and can effectively restrict the relative motion of first connecting portion and second connecting portion in the third direction.

In some embodiments, the first connecting portion protrudes from the first main body along the first direction, the second connecting portion is formed by recessing the second main body towards the second end face of the first main body, and the first connecting portion and the second connecting portion are in concave-convex fit and clamping connection; or the second connecting part protrudes out of the second main body along the first direction, the first connecting part is formed by the first main body sinking towards the first end face of the second main body, and the first connecting part and the second connecting part are matched in a concave-convex mode and clamped. In the bolster of this application embodiment, first connecting portion and second connecting portion can be for unsmooth complex form to further cooperate the joint through the joint structure that sets up on first connecting portion and the second connecting portion, in order to realize fixedly.

In some embodiments, the first connecting portion is spaced from each edge of the first end surface by a first preset distance; the second connecting portion and each edge of the second end face are respectively spaced by a first preset distance. So make first connecting portion and second connecting portion when the cooperation, realize the two spacing in second direction and third direction.

In some embodiments, a side surface of the first connecting portion perpendicular to the first end surface is a first side surface, and a convex or concave fifth clamping portion is arranged on the first side surface; the side surface of the second connecting part, which is perpendicular to the second end surface, is a second side surface, and a concave or convex sixth clamping part is arranged on the second side surface; the fifth clamping part and the sixth clamping part are matched and clamped to limit the relative movement of the fifth clamping part and the sixth clamping part in the first direction. Such design can first connecting portion and second connecting portion joint to realize first connecting portion and second connecting portion spacing on the first direction, thereby realize the reliable fixed of first component and second component.

In some embodiments, the cross sections of the fifth clamping portion and the sixth clamping portion are formed in a triangle shape, and include a fifth clamping surface and a sixth clamping surface, the fifth clamping surface is parallel to the first end surface, and the sixth clamping surface is an inclined surface; the distance between the sixth clamping surface and the first side surface or the second side surface where the sixth clamping surface is located is gradually reduced from one end close to the first end surface to one end far away from the first end surface. In such design, can make the convenient joint of fifth joint portion and sixth joint portion, simplify the fixed mode of first component and second component, and can effectively restrict the relative motion of first connecting portion and second connecting portion in the first direction.

In some embodiments, the two first connecting portions of the first member are oppositely disposed in the second direction, and the two second connecting portions of the second member are oppositely disposed in the second direction; or, the two first connecting parts of the first component are arranged in an staggered mode in the second direction, and the two second connecting parts of the second component are arranged in an staggered mode in the second direction. In the buffer of the embodiment of the present application, the positions where the first member and the second member are connected may be opposite in the second direction; alternatively, the positions where the first member and the second member are connected may be staggered in the second direction.

In some embodiments, the first body and the second body are the same shape; alternatively, the first body and the second body are different in shape. The main body parts of the first member and the second member may be of the same structure to form a hollow frame structure buffer by splicing; alternatively, the body portions of the first and second members may be of different configurations, complementary to one another, to form a hollow frame-structured buffer.

In a second aspect, the present application provides a battery comprising: a plurality of battery cells; in the above embodiment, the buffer member is disposed between the adjacent battery cells.

In a third aspect, the present application provides an electric device comprising the battery in the above embodiments.

The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the above and other objects, features, and advantages of the present application more clearly understood.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is an exploded view of a battery cell according to some embodiments of the present disclosure;

FIG. 4 is a schematic view of a buffer according to some embodiments of the present application;

FIG. 5 is a schematic axial side view of a buffer according to some embodiments of the present application;

FIG. 6 is an exploded view of a buffer according to some embodiments of the present application;

FIG. 7 is an exploded view of a buffer according to some embodiments of the present application;

FIG. 8 is a schematic view of a first member of a buffer according to some embodiments of the present application;

FIG. 9 is an enlarged partial view of the portion A of FIG. 8;

FIG. 10 is a schematic view of another angle of the first member of the buffer of some embodiments of the present application;

FIG. 11 is a schematic view of another angle of the first member of the buffer according to some embodiments of the present application;

FIG. 12 is a schematic view of another angle of the first member of the buffer of some embodiments of the present application;

fig. 13 is a schematic cross-sectional view illustrating a first connection portion and a second connection portion of a buffer according to some embodiments of the present application;

FIG. 14 is a schematic axial side view of a bumper member according to other embodiments of the present application;

FIG. 15 is an exploded view of another embodiment of a buffer of the present application;

FIG. 16 is an enlarged view of the portion B in FIG. 15;

fig. 17 is a schematic cross-sectional view illustrating a first connection portion and a second connection portion of a buffer according to another embodiment of the present application.

The reference numbers in the detailed description are as follows:

vehicle 10, controller 11, motor 12;

the battery 20, the case 21, the first portion 211, the second portion 212, the housing chamber 22;

battery cell 30, case 31, end cap 32, electrode assembly 33;

a buffer 40, a first member 41, a second member 42;

a first body 411, a first end surface 411a, a first connecting portion 412, a first surface 412a, a first protrusion 413, a first groove 414, a first clamping portion 415, a fourth clamping portion 416, and a fifth clamping portion 417;

a second body 421, a second end surface 421a, a second connecting portion 422, a second surface 422a, a second protrusion 423, a second groove 424, a second clamping portion 425, a third clamping portion 426, a sixth clamping portion 427, and a hollow portion 43;

a first clamping surface 40a, a second clamping surface 40b, a third clamping surface 40c, a fourth clamping surface 40d, a fifth clamping surface 40e and a sixth clamping surface 40 f;

a first direction X, a second direction Y and a third direction Z.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: there are three cases of A, A and B, and B. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

During the use of the battery 20, the battery 20 may be loose due to the expansion force generated by the battery cells 30 in the battery 20. At present, in order to relieve the influence of the expansion force of the single cells on the battery 20, a buffer pad is generally added between two battery cells 30; the traditional cushion is generally formed into a one-piece type clip frame structure, the inventor notices that the traditional cushion needs to be formed by cutting off the material of the middle part of a flat sheet, and the cushion formed by the cutting mode wastes more than 50 percent of raw materials, and some of the raw materials even reach 80 percent, thereby not only improving the manufacturing cost of the cushion, but also greatly wasting resources.

In order to reduce the problem of resource waste, the applicant researches and discovers that the cushion can be designed into a split structure, specifically, the cushion is designed into two parts, the two parts can be formed by separately cutting sheets and splicing the sheets to form a frame structure, so that the utilization rate of the sheets can be improved to the maximum extent, and the cost and the resource waste are reduced; two parts of the cushion pad can be fixed by gluing, but the problems of poor positioning and assembling precision and complex fixing mode exist.

Based on the above consideration, in order to solve the problem that the fixing mode of the split type cushion pad is low in reliability and is relatively cumbersome, the inventor conducts intensive research, a buffer 40 is designed, the buffer is of a split type structure, and comprises a first component 41 and a second component 42 which are independent of each other, the first component 41 and the second component 42 can be spliced relatively to form the buffer 40, the first component 41 and the second component 42 respectively comprise two first connecting portions 412 and two second connecting portions 422, the corresponding first connecting portions 412 and the corresponding second connecting portions 422 are in concave-convex fit and clamped, the fixing of the first component 41 and the second component 42 can be realized, in such a buffer component, the first component 41 and the second component 42 can be accurately positioned and reliably connected through the concave-convex fit and clamped fixing mode, and the auxiliary fixing through the splicing is not needed, the connecting mode is simple, and the operation is convenient.

The embodiment of the present application provides an electric device using a battery 20 as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

For convenience of description, the following embodiments will be described by taking a vehicle 10 as an example of an electric device according to an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 10 according to some embodiments of the present disclosure. The vehicle 10 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The interior of the vehicle 10 is provided with a battery 20, and the battery 20 may be provided at the bottom or at the head or tail of the vehicle 10. The battery 20 may be used for power supply of the vehicle 10, for example, the battery 20 may serve as an operation power source of the vehicle 10. The vehicle 10 may also include a controller 11 and a motor 12, with the controller 11 being used to control the battery 20 to power the motor 12, for example, for start-up, navigation, and operational power requirements while traveling of the vehicle 10.

In some embodiments of the present application, the battery 20 may be used not only as an operating power source for the vehicle 10, but also as a driving power source for the vehicle 10, instead of or in part of fuel or natural gas to provide driving power for the vehicle 10.

Referring to fig. 2, fig. 2 is an exploded view of a battery 20 according to some embodiments of the present disclosure. The battery 20 includes a case 21 and a battery cell 30, and the battery cell 30 is accommodated in the case 21. The box 21 is used to provide a receiving space for the battery cell 30, and the box 21 may have various structures. In some embodiments, the case 21 may include a first portion 211 and a second portion 212, the first portion 211 and the second portion 212 cover each other, and the first portion 211 and the second portion 212 together define the receiving cavity 22 for receiving the battery cell 30. The second portion 212 may be a hollow structure with an open end, the first portion 211 may be a plate-shaped structure, and the first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 jointly define the accommodating cavity 22; the first portion 211 and the second portion 212 may be hollow structures with one side opened, and the opening side of the first portion 211 is covered on the opening side of the second portion 212. Of course, the case 21 formed by the first portion 211 and the second portion 212 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 20, there may be a plurality of battery cells 30, and the plurality of battery cells 30 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 30. The plurality of battery monomers 30 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 30 is accommodated in the box body 21; of course, the battery 20 may also be a battery module formed by connecting a plurality of battery cells 30 in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole and are accommodated in the box 21. The battery 20 may further include other structures, for example, the battery 20 may further include a bus member for achieving electrical connection between the plurality of battery cells 30; a buffer member 40 disposed between adjacent battery cells 30 may be further included to mitigate the influence of the expansion force of the battery cells 30 on the battery.

Wherein each battery cell 30 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 30 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, fig. 3 is an exploded schematic view of a battery cell 30 according to some embodiments of the present disclosure. The battery cell 30 refers to the smallest unit constituting the battery 20. As shown in fig. 3, the battery cell 30 includes an end cap 32, a case 31, an electrode assembly 33, and other functional components.

The end cap 32 refers to a member that covers an opening of the case 31 to isolate the internal environment of the battery cell 30 from the external environment. Without limitation, the shape of the end cap 32 may be adapted to the shape of the housing 31 to fit the housing 31. Alternatively, the end cap 32 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 32 is not easily deformed when being extruded and collided, and the single battery 30 may have a higher structural strength and an improved safety performance. The end cap 32 may be provided with functional components such as electrode terminals. The electrode terminals may be used to electrically connect with the electrode assembly 33 for outputting or inputting electric power of the battery cell 30. In some embodiments, the end cap 32 may further include a pressure relief mechanism for relieving the internal pressure of the battery cell 30 when the internal pressure or temperature reaches a threshold value. The material of the end cap 32 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in the embodiments of the present invention. In some embodiments, insulation may also be provided on the inside of the end cap 32, which may be used to isolate the electrical connection components within the housing 31 from the end cap 32 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The case 31 is an assembly for mating with the end cap 32 to form an internal environment of the battery cell 30, wherein the formed internal environment may be used to house the electrode assembly 33, electrolyte, and other components. The housing 31 and the end cap 32 may be separate components, and an opening may be formed in the housing 31, and the end cap 32 may cover the opening at the opening to form the internal environment of the battery cell 30. Without limitation, the end cap 32 and the housing 31 may be integrated, and specifically, the end cap 32 and the housing 31 may form a common connecting surface before other components are inserted into the housing, and when it is necessary to seal the interior of the housing 31, the end cap 32 covers the housing 31. The housing 31 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 31 may be determined according to the specific shape and size of the electrode assembly 33. The material of the housing 31 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The electrode assembly 33 is a component of the battery cell 30 in which electrochemical reactions occur. One or more electrode assemblies 33 may be contained within the case 31. The electrode assembly 33 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portions of the electrode assembly 33, and the portions of the positive and negative electrode tabs having no active material each constitute a tab. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 20, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

Referring to fig. 3, and with further reference to fig. 4-17, according to some embodiments of the present application, as shown therein, there is provided a buffer 40 for a battery 20, the buffer 40 comprising: a first member 41 and a second member 42 which are oppositely arranged in the first direction X and are spliced to form a buffer 40; the first member 41 includes: a first body 411 and two first connection parts 412 provided at both end parts of the first body 411; the second member 42 includes: a second body 421 and two second connection parts 422 disposed at two ends of the second body 421; the first connection portion 412 and the second connection portion 422 are concavo-convex fitted and snap-fitted to fix the first member 41 and the second member 42.

Taking fig. 4 and 5 as an example, as shown in the drawings, the X direction is the longitudinal direction of the cushion member 40, the Y direction is the width direction of the cushion member 40, and the Z direction is the thickness direction of the cushion member 40.

The buffer member 40 provided by the application is applied to the battery 20, is specifically arranged between two adjacent battery cells 30 of the battery 20, is made of a buffer material, can relieve the influence of the expansion force of the battery cells 30 on the battery 20, and can absorb the assembly tolerance between the battery cells 30 in the assembly process, so that the assembly size precision of the whole battery 20 can be ensured to the greatest extent; the buffer member 40 is of a split structure and comprises a first member 41 and a second member 42 which are independent from each other, and through the design of the split structure, the first member 41 and the second member 42 are both of independent structures, but not limited to the first member and the second member being formed by separately cutting sheets, and both the first member 41 and the second member can be rapidly formed by using less materials, so that the first member 41 and the second member 42 are simple in structure and less in material consumption, and the utilization rate of the materials can be improved to the maximum extent; the first member 41 and the second member 42 may be relatively spliced to form the buffer 40, the first member 41 includes a first body 411 and two first connection portions 412 located at two ends of the first body 411, the second member 42 includes a second body 421 and two second connection portions 422 located at two ends of the second body 421, and the shapes of the first body 411 and the second body 421 may be the same, for example: referring to fig. 4, the first body 411 and the second body 421 may be respectively configured as an "Contraband" shape and oppositely configured in the first direction X, or the first body 411 and the second body 421 may have different shapes but may be complementary to each other to form the buffer member 40; the two first connecting portions 412 and the two second connecting portions 422 correspond to each other respectively, and are in concave-convex fit and clamped connection, so that the limit of the two in the first direction X, the second direction Y and the third direction Z can be realized, the first member 41 and the second member 42 can be fixed without additional modes such as fit gluing, the first member 41 and the second member 42 can be reliably fixed by using a simpler and more convenient and easier-to-operate mode, and the precision of fixed connection of the first member 41 and the second member 42 can be ensured.

The "concave-convex matching" of the first connection portion 412 and the second connection portion 422 may refer to that the first connection portion 412 and the second connection portion 422 are respectively a convex structure and a concave structure formed opposite to the first body 411 and the second body 421 and are matched with each other, or may also refer to that the convex structure and the concave structure are respectively arranged on the first connection portion 412 and the second connection portion 422 to realize matching, which will be described in detail below.

The shape of the buffer member 40 may be rectangular, in order to ensure that the size of the buffer member 40 does not exceed the size range of the battery cell 30 when the buffer member 40 is pressed between the battery cells 30, the sizes of the buffer member 40 in the first direction X and the second direction Y may be reasonably determined according to the height size and the width size of the battery cell 30, respectively, and the size of the buffer member 40 in the third direction Z may be calculated according to the assembly gap and the assembly pretightening force of the battery cell 30 in the battery 20.

Fig. 8 and 10 are schematic axial side views of the first member 41 at different angles, and fig. 11 and 12 are schematic structural views of the first member 41 at two opposite viewing angles.

In the buffer member 40 of the embodiment of the application, the buffer member 40 can absorb the assembly tolerance between the battery cells 30 in the assembly process by using the elasticity of the buffer member 40, so that the assembly dimensional accuracy of the whole battery 20 can be ensured to the greatest extent; and split type structure is favorable to improving material utilization, first component 41 and second component 42 set up first connecting portion 412 and second connecting portion 42 respectively, first connecting portion 412 and second connecting portion 422 are spacing through the mode realization all directions of unsmooth cooperation and joint to realize the reliable fixed of first component 41 and second component 42, can improve the intensity and the reliability of bolster 40, and need not additionally adopt modes such as splice, simplified the fixed mode of first component 41 and second component 42.

According to some embodiments of the present application, optionally, please continue to refer to fig. 4, 5 and 14, as shown in the drawings, the buffer member 40 includes a hollow frame structure.

The first member 41 and the second member 42 may be spliced to form a hollow frame structure, specifically, a rectangular frame structure, and the hollow portion 43 may also be rectangular in shape, and the size thereof may be set according to the range of the expansion region of the battery cell 30; when the buffer member 40 is applied to the battery 20, the hollow part 43 formed by the first member 41 and the second member 42 of the buffer member 40 can absorb the expansion force generated by the battery cell 30 in time, so that the buffer member 40 can meet the requirement of the expansion force of the battery cell 30, and the service life of the battery 20 is ensured.

Such a design is advantageous in terms of ensuring the service life of the battery 20, reducing the manufacturing cost of the buffer member 40, and saving resources.

According to some embodiments of the present application, optionally, please continue to refer to fig. 5 to 13, as shown in the drawings, the first connecting portion 412 protrudes from the first main body 411 along the first direction X; the second connection portion 422 protrudes from the second body 421 along the first direction X; the first connection portion 412 and the second connection portion 422 have the same width in the second direction Y, and are disposed opposite to each other in the third direction Z; the first direction X, the second direction Y and the third direction Z are mutually perpendicular in pairs.

The first connecting portion 412 may protrude from the first body 411 in the first direction X, correspondingly, the second connecting portion 422 may protrude from the second body 421 in the first direction X, and the first connecting portion 412 and the second connecting portion 422 are oppositely disposed in the third direction Z, and may be in a complementary relationship, and the shapes and the sizes of the two portions may be respectively equal, so that after the first connecting portion 412 and the second connecting portion 422 are connected, the positions of the first body 411 and the second body 421 in the first direction X are opposite; the first connecting portion 412 and the second connecting portion 422 can be further matched and clamped by the concave-convex structures.

In the buffer 40 of the embodiment of the application, the first connecting portion 412 and the second connecting portion 422 can protrude from the first main body 411 and the second main body 421 respectively, and the first connecting portion 412 and the second connecting portion 422 are arranged oppositely in the third direction Z, so that the first connecting portion 412 and the second connecting portion 422 are connected in a matched manner by the concave-convex structures.

According to some embodiments of the present application, optionally, referring to fig. 6 to 13, as shown in the drawings, a surface of the first connection portion 412 opposite to the second connection portion 422 in the third direction Z is a first surface 412a, and the first surface 412a is sequentially provided with a first protrusion 413 and a first groove 414 along the first direction X; a surface of the second connection part 422 opposite to the first surface 412a is a second surface 422a, and a second groove 424 and a second protrusion 423 which are respectively matched with the first protrusion 413 and the first groove 414 are sequentially arranged on the second surface 422 a; wherein the first protrusion 413 and the second groove 424 are matched and clamped, and/or the second protrusion 423 and the first groove 414 are matched and clamped.

The first connecting portion 412 and the second connecting portion 422 are oppositely arranged in the third direction Z, the opposite surfaces of the first connecting portion 412 and the second connecting portion 422 are respectively a first surface 412a of the first connecting portion 412 and a second surface 422a of the second connecting portion 422, the first surface 412a of the first connecting portion 412 is sequentially provided with a first protrusion 413 and a first groove 414 along the first direction X, correspondingly, the second surface 422a of the second connecting portion 422 is sequentially provided with a second protrusion 423 and a second groove 424 along the first direction X, the first protrusion 413 and the second groove 424 can be in concave-convex fit, the second protrusion 423 and the first groove 414 can be in concave-convex fit, at least, the relative movement of the first member 41 and the second member 42 in the first direction X can be limited, the clamping and fixing can be realized through the clamping structure arranged on the first protrusion 413 and the second groove 424, and/or the clamping and fixing can be realized through the clamping structure arranged on the second protrusion 423 and the first groove 414, the first member 41 and the second member 42 are limited in other directions, so that the first member 41 and the second member 42 are fixed; the clamping manner of the first protrusion 413 and the second groove 424 is not limited to one, and similarly, the clamping manner of the second protrusion 423 and the first groove 414 is not limited to one, which will be described in detail below; referring to fig. 9, as shown in the drawings, the cross-sectional shapes of the first protrusion 413 and the first groove may be rectangular, and the cross-sectional shapes of the second protrusion 423 and the second groove 424 may be rectangular, where the cross-section refers to an X-Y cross-section, and further, the shapes and the sizes of the first protrusion 413 and the second protrusion 423 may be respectively equal.

The first connection part 412 and the second connection part 422 are designed to be capable of realizing the limit in at least the first direction X by the matching of the first protrusion 413 and the second groove 424 and the matching of the second protrusion 423 and the first groove 414, and realizing the limit in other directions for the first member 41 and the second member 42 by the concave-convex matching and the clamping of the structures on the first protrusion 413 and the second groove 424 and/or the concave-convex matching and the clamping of the structures on the second protrusion 423 and the first groove 414, so as to fix the first member 41 and the second member 42.

According to some embodiments of the present application, optionally, referring to fig. 6, the first protrusion 413 and the first groove 414 are located between two opposite edges of the first surface 412a along the second direction Y; the second protrusion 423 and the second groove 424 are located between both edges of the second surface 422a in the second direction Y pair.

To facilitate the connection and fixation of the first connection part 412 and the second connection part 422, the first protrusion 413 and the first groove 414 may not be disposed at the edge of the first surface 412a in the second direction Y, and the second protrusion 423 and the second groove 424 may not be disposed at the edge of the second surface 422a in the second direction Y, so that the first protrusion 413 and the second groove 424, and the second protrusion 423 and the first groove 414 cooperate to simultaneously limit the first connection part 412 and the second connection part 422 in the first direction X and the second direction Y. To facilitate the connection and fixation of the first connection part 412 and the second connection part 422, the first protrusion 413 and the first groove 414 may not be disposed at the edge of the first surface 412a in the second direction Y, and the second protrusion 423 and the second groove 424 may not be disposed at the edge of the second surface 422a in the second direction Y, so that the first protrusion 413 and the second groove 424, and the second protrusion 423 and the first groove 414 cooperate to simultaneously limit the first connection part 412 and the second connection part 422 in the first direction X and the second direction Y. Most preferably, the centers of the first protrusion 413 and the first groove 414 in the second direction Y may be set to correspond to the center of the first surface 412a in the second direction Y, and the centers of the second protrusion 423 and the second groove 424 in the second direction Y may be set to correspond to the center of the second surface 422a in the second direction Y, and the sizes of the first protrusion 413, the first groove 414, the second protrusion 423, and the second groove 424 in the second direction Y are smaller than the sizes of the first surface 412a and the second surface 422a in the second direction Y.

The first connection part 412 and the second connection part 422 are designed to be capable of simultaneously limiting in the first direction X and the second direction Y by the cooperation of the first protrusion 413 and the second groove 424, and the cooperation of the second protrusion 423 and the first groove 414.

According to some embodiments of the present application, optionally, please refer to fig. 9 and 13, as shown in the drawings, a sidewall of the first protrusion 413 is provided with a first convex or concave clamping portion 415, a sidewall of the second groove 424 is provided with a second concave or convex clamping portion 425, and the first clamping portion 415 and the second clamping portion 425 are matched and clamped to limit the relative movement of the two in the third direction Z; and/or a side wall of the second protrusion 423 is provided with a convex or concave third clamping part 426, a side wall of the first groove 414 is provided with a concave or convex fourth clamping part 416, and the third clamping part 426 and the fourth clamping part 416 are matched and clamped to limit relative movement of the two parts in the third direction Z.

In order to limit the first connecting portion 412 and the second connecting portion 422 in the third direction Z, a first clamping portion 415 protruding or recessed relative to at least one side wall of the first protrusion 413 may be disposed on at least one side wall of the first protrusion 413, and correspondingly, a second clamping portion 425 in concave-convex fit with the first clamping portion 415 is disposed on at least one side wall of the second groove 424, so that relative movement of the first connecting portion 412 and the second connecting portion 422 in the third direction Z is limited by concave-convex fit of the first clamping portion 415 and the second clamping portion 425; or, a third clamping portion 426 protruding or recessed relative to at least one side wall of the second protrusion 423 may be further provided, correspondingly, a fourth clamping portion 416 that is in concave-convex fit with the third clamping portion 426 may be provided on at least one side wall of the first groove 414, and the relative movement of the first connecting portion 412 and the second connecting portion 422 in the third direction Z is limited by the concave-convex fit of the third clamping portion 426 and the fourth clamping portion 416; alternatively, referring to fig. 13, as shown in the figure, the first clamping portion 415, the second clamping portion 425, the third clamping portion 426 and the fourth clamping portion 416 may be disposed at the same time, so as to further improve the reliability of connection and fixation between the first connection portion 412 and the second connection portion 422.

Referring to fig. 6 and 13, when the shapes and sizes of the first body 411 and the second body 421 are the same, and the shapes and sizes of the first protrusion 413 and the second protrusion 423 are the same, the first clamping portion 415 and the third clamping portion 426 may be set to have the same shape and corresponding positions, and the second clamping portion 425 and the fourth clamping portion 416 may be set to have the same shape and corresponding positions, so that the first member 41 and the second member 42 may form the same structure, which may reduce the processing difficulty, improve the processing efficiency, further improve the material utilization rate, and reduce the manufacturing cost of the cushion member 40.

Such a design enables the first connection portion 412 and the second connection portion 422 to be clamped, and realizes the position limitation of the first connection portion 412 and the second connection portion 422 in the third direction Z, thereby realizing the reliable fixation of the first member 41 and the second member 42.

According to some embodiments of the present application, optionally, referring to fig. 13, as shown in the drawing, the cross-sectional shapes of the first clamping portion 415 and the second clamping portion 425 are triangular, and include a first clamping surface 40a and a second clamping surface 40b, the first clamping surface 40a is parallel to the first surface 412a, and the second clamping surface 40b is an inclined surface; the distance between the second engaging surface 40b and the side of the first connecting portion 412 abutting against the second body 421 gradually increases from the end thereof away from the first surface 412a to the end thereof close to the first surface 412 a; wherein the cross section is parallel to the first direction X and the third direction Z.

In order to realize the clamping fixation of the first clamping portion 415 and the second clamping portion 425 in the third direction Z, the cross-sectional shapes of the first clamping portion 415 and the second clamping portion 425 may be set to be triangular, where the cross-section specifically refers to an X-Z cross-section, and one of the first clamping portion 415 and the second clamping portion 425 is a concave structure and the other is a convex structure, for example: the first clamping portion 415 may be disposed on a side surface of the first protrusion 413 facing the first main body 411 and configured as a concave structure, and the second clamping portion 425 is disposed on a groove wall of the second groove 424 facing the second main body 421 and configured as a convex structure, when the two are clamped, the convex structure may be deformed by its own elasticity to achieve connection with the concave structure; the first clamping portion 415 and the second clamping portion 425 each include a first clamping surface 40a and a second clamping surface 40b, the first clamping surface 40a and the second clamping surface 40b of the first clamping portion 415 are connected to the side wall of the first protrusion 413, the first clamping surface 40a and the second clamping surface 40b of the second clamping portion 425 are connected to the groove wall of the second groove 424, wherein the first clamping surface 40a is a horizontal plane parallel to the first surface 412a, the second clamping surface 40b is an inclined plane, an included angle formed by the inclined plane and the first clamping surface 40a is an acute angle, and the inclined direction is: the distance between the second clamping surface 40b and the side surface of the first connecting portion 412 abutting against the second main body 421 is gradually increased from one end of the second clamping surface 40b far away from the first surface 412a to the other end of the second clamping surface, the first member 41 and the second member 42 can be spliced from the third direction Z by the arrangement of the inclined second clamping surface 40b, the first connecting portion 412 and the second connecting portion 422 are connected to play a guiding role, the first connecting portion 412 and the second connecting portion 422 can be conveniently clamped from the third direction Z, and the first connecting portion 412 and the second connecting portion 422 can be prevented from generating relative movement in the third direction Z after clamping.

In such a design, the first clamping part 415 and the second clamping part 425 can be conveniently clamped, and the fixing mode of the first member 41 and the second member 42 is simplified.

According to some embodiments of the present application, optionally, referring to fig. 13 again, as shown in the drawings, the cross-sectional shapes of the third clamping portion 426 and the fourth clamping portion 416 are triangular, and include a third clamping surface 40c and a fourth clamping surface 40d, the third clamping surface 40c is parallel to the first surface 412a, and the fourth clamping surface 40d is an inclined surface; the distance between the fourth engaging surface 40d and the first side surface of the first connecting portion 412 abutting against the second body 421 gradually increases from one end close to the first surface 412a to one end far away from the first surface 412 a; wherein the cross section is parallel to the first direction X and the third direction Z.

In order to realize the clamping fixation of the third clamping portion 426 and the fourth clamping portion 416 in the third direction Z, the cross-sectional shapes of the third clamping portion 426 and the fourth clamping portion 416 may be set to be triangular, where the cross-section specifically refers to an X-Z cross-section, and one of the third clamping portion 426 and the fourth clamping portion 416 is a concave structure and the other is a convex structure, for example: the third clamping portion 426 may be disposed on a side surface of the second protrusion 423 facing the second main body 421, and is configured as a concave structure, and the fourth clamping portion 416 is disposed on a groove wall of the first groove 414 facing the first main body 411, and is configured as a convex structure, when the two are clamped, the convex structure may deform by using its own elasticity to achieve connection with the concave structure; the third clamping portion 426 and the fourth clamping portion 416 each include a third clamping surface 40c and a fourth clamping surface 40d, the third clamping surface 40c and the fourth clamping surface 40d of the third clamping portion 426 are connected to the side wall of the second protrusion 423, the third clamping surface 40c and the fourth clamping surface 40d of the fourth clamping portion 416 are connected to the groove wall of the first groove 414, wherein the third clamping surface 40c is a horizontal plane parallel to the first surface 412a, the fourth clamping surface 40d is an inclined plane, an included angle formed between the inclined plane and the third clamping surface 40c is an acute angle, and the inclined direction is: the distance between the fourth clamping surface 40d and the side surface of the first connecting portion 412 abutting against the second main body 421 is gradually increased from one end of the second clamping surface 40b close to the first surface 412a to the other end, the first member 41 and the second member 42 can be spliced from the third direction Z by the arrangement of the inclined fourth clamping surface 40d, and the first connecting portion 412 and the second connecting portion 422 are connected to play a guiding role, so that the first connecting portion 412 and the second connecting portion 422 can be conveniently clamped from the third direction Z, and the first connecting portion 412 and the second connecting portion 422 can be prevented from generating relative movement in the third direction Z after clamping.

When the first clip portion 415 is disposed on the sidewall of the first protrusion 413, the second clip portion 425 is disposed on the sidewall of the second recess 424, and the third clip portion 426 is disposed on the sidewall of the second protrusion 423, and the fourth clip portion 416 is disposed on the sidewall of the first recess 414, the first clip portion 415 and the third clip portion 426 may be disposed in the same shape, and the second clip portion 425 and the fourth clip portion 416 may be disposed in the same shape, for example: first joint portion 415 and third joint portion 426 can set up to the shape, the same sunk structure of size, second joint portion 425 and fourth joint portion 416 can set up to the shape, the same protruding structure of size, if set up first main part 411 and second main part 421 into the same structure simultaneously, can make first component 41 and second component 42 identical, thereby can only process the structure of a shape, can reduce the processing degree of difficulty, improve machining efficiency, can further save material and cost.

In such a design, the third clamping portion 426 and the fourth clamping portion 416 can be conveniently clamped, and the fixing mode of the first member 41 and the second member 42 is simplified.

According to some embodiments of the present application, optionally, referring to fig. 14 to 16, as shown in the drawings, the first connecting portion 412 protrudes out of the first main body 411 along the first direction X, the second connecting portion 422 is formed by the second main body 421 being recessed toward the second end surface 421a of the first main body 411, and the first connecting portion 412 and the second connecting portion 422 are concave-convex matched and clamped; or, the second connection portion 422 protrudes out of the second main body 421 along the first direction X, the first connection portion 412 is formed by the first main body 411 being recessed toward the first end surface 411a of the second main body 421, and the first connection portion 412 and the second connection portion 422 are in concave-convex fit and clamped.

The first connection part 412 and the second connection part 422 may adopt a concave-convex fit form, specifically; the first connection portion 412 may protrude from the protruding structure of the first body 411 along the first direction X, and the second connection portion 422 is a recessed structure formed on the second end surface 421a of the second body 421 facing the first body 411; alternatively, the first connecting portion 412 may be a concave structure formed on the first end surface 411a of the first main body 411 facing the second main body 421, and the second connecting portion 422 is a convex structure protruding from the second main body 421 along the first direction X; can make first connecting portion 412 and the unsmooth cooperation of second connecting portion 422, realize the two spacing in at least one orientation to the joint structure of the accessible setting on first connecting portion 412 and second connecting portion 422 realizes the joint of the two. The cross-sectional shapes of the first connection portion 412 and the second connection portion 422 may be, but are not limited to, rectangular, and the cross-section herein specifically refers to a Y-Z cross-section.

In the buffer 40 of the embodiment of the present application, the first connecting portion 412 and the second connecting portion 422 can be in a concave-convex matching manner, and the clamping structure arranged on the first connecting portion 412 and the second connecting portion 422 is further matched and clamped to realize fixation.

According to some embodiments of the present application, optionally, referring to fig. 16, as shown in the figure, the first connecting portion 412 is spaced apart from each edge of the first end surface 411a by a first preset distance, respectively; the second connecting portion 422 is spaced apart from each edge of the second end surface 421a by a first predetermined distance.

In order to enable the first connection portion 412 and the second connection portion 422 to be in concave-convex fit to achieve the limit of the first connection portion 412 and the second connection portion 422 in the second direction Y and the third direction Z, the first connection portion 412 may be disposed not adjacent to each edge of the first end surface 411a, and the first connection portion 412 and each edge of the first end surface 411a may be spaced by a first preset distance, correspondingly, the second connection portion 422 may be disposed not adjacent to each edge of the second end surface 421a, and the stacked connection portion and each edge of the second end surface 421a may be spaced by a first preset distance, where the size of the first preset distance is not limited specifically; therefore, the first connection part 412 and the second connection part 422 can be limited from relative movement in the second direction Y and the third direction Z by the concave-convex matching.

Therefore, the first connecting part 412 and the second connecting part 422 are matched and simultaneously realize the limit of the first connecting part 412 and the second connecting part in the second direction Y and the third direction Z.

According to some embodiments of the present application, optionally, please continue to refer to fig. 16 and 17, as shown in the drawings, a side of the first connecting portion 412 perpendicular to the first end surface 411a is a first side surface, and a convex or concave fifth clamping portion 417 is disposed on the first side surface; the side surface of the second connecting portion 422 perpendicular to the second end surface 421a is a second side surface, and a concave or convex sixth clamping portion 427 is arranged on the second side surface; the fifth and sixth catching portions 417 and 427 are fitted and caught to restrict relative movement therebetween in the first direction X.

The side of the first connection portion 412 perpendicular to the first end surface 411a is a first side, and the side of the second connection portion 422 perpendicular to the second end surface 421a is a second side, as described above, for example, the cross-sectional shapes of the first connection portion 412 and the second connection portion 422 are rectangular, and the first connection portion 412 and the second connection portion 422 respectively have four first sides and four second sides; in order to limit the first connection portion 412 and the second connection portion 422 in the first direction X, a fifth clamping portion 417 protruding or recessed relative to at least one first side surface of the first connection portion 412 may be disposed, and a corresponding sixth clamping portion 427 disposed on a corresponding second side surface of the second connection portion 422 and in concave-convex fit with the fifth clamping portion 417 may be disposed. The cross-sectional shapes of the fifth clamping portion 417 and the sixth clamping portion 427 can be, but are not limited to, semicircular, circular arc, triangular, etc., and the cross-section herein specifically refers to a Y-Z cross-section.

Such a design enables the first connection portion 412 and the second connection portion 422 to be clamped, and realizes the position limitation of the first connection portion 412 and the second connection portion 422 in the first direction X, thereby realizing the reliable fixation of the first member 41 and the second member 42.

According to some embodiments of the present application, optionally, referring to fig. 17, as shown in the drawing, the cross sections of the fifth clamping portion 417 and the sixth clamping portion 427 are formed in a triangle shape, including a fifth clamping surface 40e and a sixth clamping surface 40f, the fifth clamping surface 40e is parallel to the first end surface 411a, and the sixth clamping surface 40f is an inclined surface; the distance between the sixth engaging surface 40f and the first side surface or the second side surface is gradually decreased from the end close to the first end surface 411a to the end far from the first end surface 411 a.

In order to realize the clamping fixation of the fifth clamping portion 417 and the sixth clamping portion 427 in the first direction X, the cross-sectional shapes of the fifth clamping portion 417 and the sixth clamping portion 427 may be set to be triangular, where the cross-section is specifically an X-Z cross-section, and one of the fifth clamping portion 417 and the sixth clamping portion 427 is a concave structure and the other is a convex structure, for example: the fifth clamping portion 417 and the sixth clamping portion 427 can be arranged to be convex structures, and when the fifth clamping portion 417 and the sixth clamping portion 427 are clamped, the convex structures can be elastically deformed by themselves to realize connection with the concave structures; the fifth clamping portion 417 and the sixth clamping portion 427 each include a fifth clamping surface 40e and a sixth clamping surface 40f, wherein the fifth clamping surface 40e is a vertical surface parallel to the first end surface 411a and the second end surface 421a, the sixth clamping surface 40f is an inclined surface, an included angle formed by the inclined surface and the fifth clamping surface 40e is an acute angle, and the inclined direction is: the distance between the sixth clamping surface 40f and the first side surface or the second side surface where the sixth clamping surface is located is gradually reduced from one end close to the first end surface 411a and the second end surface 421a to one end far away from the first end surface 411a and the second end surface 421a, and by the arrangement of the inclined sixth clamping surface 40f, the first member 41 and the second member 42 can be spliced in the first direction X, and can play a role in guiding when the first connecting portion 412 and the second connecting portion 422 are connected, so that the first connecting portion 412 and the second connecting portion 422 can be conveniently clamped in the first direction X, and the first connecting portion 412 and the second connecting portion 422 can be prevented from generating relative movement in the first direction X after clamping.

In such a design, the fifth snap-in portion 417 and the sixth snap-in portion 427 can be conveniently snapped, and the fixing manner of the first member 41 and the second member 42 is simplified.

According to some embodiments of the present application, optionally, the two first connection portions 412 of the first member 41 are oppositely disposed in the second direction Y, and the two second connection portions 422 of the second member 42 are oppositely disposed in the second direction Y; alternatively, the two first connection portions 412 of the first member 41 are disposed alternately in the second direction Y, and the two second connection portions 422 of the second member 42 are disposed alternately in the second direction Y; wherein the second direction Y is perpendicular to the first direction X.

The two first connecting portions 412 of the first member 41 may be oppositely disposed in the second direction Y, and correspondingly, the two second connecting portions 422 of the second member 42 are oppositely disposed in the second direction Y, in this case, the first member 41 and the second member 42 may be respectively disposed in an "Contraband" shape structure, and the sizes of the two in the first direction X may be the same or different, that is, the first body 411 and the second body 421 may be the same or different structures; alternatively, the positions of the two first connecting portions 412 of the first member 41 in the second direction Y may be staggered, and correspondingly, the positions of the two second connecting portions 422 of the second member 42 in the second direction Y are also staggered, in which case, the first body 411 and the second body 421 may have the same structure or different structures.

In the buffer 40 of the embodiment of the present application, the positions where the first member 41 and the second member 42 are connected may be opposite in the second direction Y; alternatively, the positions where the first member 41 and the second member 42 are connected may be staggered in the second direction Y.

According to some embodiments of the present application, the present application also provides a battery 20 including the battery cell 30 of any of the above aspects.

According to some embodiments of the present application, the present application further provides an electrical device, including the battery 20 of any of the above aspects, and the battery 20 is used for providing electrical energy for the electrical device. The powered device may be any of the aforementioned devices or systems that employ the battery 20.

According to some embodiments of the present application, referring to fig. 5 to 7, there is provided a buffer 40 for a battery 20, the buffer 40 is a hollow frame structure formed by splicing a first member 41 and a second member 42, the first member 41 includes a first body 411 and two first connecting portions 412 located at two ends of the first body 411, the second member 42 includes a second body 421 and two second connecting portions 422 located at two ends of the second body 421, the first member 41 and the second member 42 are of identical structures, the first body 411 and the second body 421 are shaped like "Contraband" and are oppositely arranged, the positions of the two first connecting portions 412 in a second direction Y correspond, and the positions of the two second connecting portions 422 in the second direction Y correspond; since the first connection portion 412 and the second connection portion 422 have the same shape, only the shape of the first connection portion 412 is described below, the first connection portion 412 protrudes from the first main body 411 along the first direction X, a first protrusion 413 and a first groove 414 are sequentially disposed along the first direction X on a first surface 412a of the first connection portion 412 opposite to the second connection portion 422, the first protrusion 413 and the first groove 414 are located between two opposite edges of the first surface 412a along the second direction Y, the center of the first protrusion 413 and the first groove 414 in the second direction Y is located on the center line of the first surface 412a in the second direction Y, and the first protrusion 413 and the first groove 414 can be in concave-convex fit with the second groove 424 and the second protrusion 423 of the second connection portion 422 to limit the relative movement of the first connection portion 412 and the second connection portion 422 in the first direction X; to achieve the position limitation of the first connection part 412 and the second connection part 422 in the third direction Z, a recessed first catching portion 415 is provided on a side wall of the first protrusion 413 facing the first body 411, a fourth clamping portion 416 is provided on a groove wall of the first groove 414 facing the first body 411, a convex second clamping part 425 is arranged on the corresponding groove wall of the second groove 424, a concave third clamping part 426 is arranged on the side wall of the second protrusion 423, the cross section of each clamping part in the X-Z cross section is triangular, and includes a clamping surface parallel to the first surface 412a and the second surface 422a, and an angled clamping surface, the inclined clamping surface can play a role in guiding when the first connecting part 412 and the second connecting part 422 are connected, so that the first connecting part 412 and the second connecting part 422 can be conveniently clamped from the third direction Z, and can prevent the first connecting part 412 and the second connecting part 422 from generating relative movement in the third direction Z after clamping.

According to some embodiments of the present application, referring to the drawings, the present application provides a battery 20, which may include a plurality of battery cells 30 and a buffer member 40 in any of the above solutions, where the buffer member 40 is disposed between two adjacent battery cells 30, and is capable of alleviating an influence of an expansion force of the battery cells 30 on the battery 20, and absorbing an assembly tolerance between the battery cells 30 in an assembly process, so as to ensure an assembly size precision of the entire battery 20 to the maximum extent, and a hollow portion 43 of the buffer member 40 is capable of absorbing the expansion force generated by the battery cells 30 in time, so that the buffer member 40 can meet an expansion force requirement of the battery cells 30, so as to ensure a service life of the battery 20, and the buffer member 40 has a stable and reliable structure, saves materials, and is capable of reducing a cost of the battery 20 to the maximum extent; the battery 20 can be used as a power supply system of the electric device, which is beneficial to improving the stability of the power supply system.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (16)

1. A buffer for a battery, comprising:

the first member and the second member are oppositely arranged in a first direction and are spliced to form the buffer piece;

the first member includes: the first body and the two first connecting parts are arranged at two end parts of the first body;

the second member includes: the second body and two second connecting parts are arranged at two end parts of the second body;

the first connecting portion and the second connecting portion are in concave-convex matching and clamping connection so as to fix the first component and the second component.

2. The buffer of claim 1,

the buffer comprises a hollow frame structure.

3. The buffer of claim 1 or 2,

the first connecting part protrudes out of the first main body along the first direction;

the second connecting part protrudes out of the second main body along the first direction;

the first connecting part and the second connecting part have the same width in the second direction and are oppositely arranged in the third direction;

wherein the first direction, the second direction and the third direction are mutually perpendicular in pairs.

4. The buffer of claim 3,

the surface of the first connecting part, which is opposite to the surface of the second connecting part in the third direction, is a first surface, and the first surface is sequentially provided with a first bulge and a first groove along the first direction;

the surface of the second connecting part, which is opposite to the first surface, is a second surface, and a second groove and a second protrusion which are respectively matched with the first protrusion and the first groove are sequentially arranged on the second surface;

the first protrusion and the second groove are matched and clamped, and/or the second protrusion and the first groove are matched and clamped.

5. The buffer of claim 4,

the first protrusion and the first groove are positioned between two opposite edges of the first surface along the second direction;

the second protrusion and the second groove are located between two edges of the second surface that are opposite in the second direction.

6. The buffer of claim 5,

the side wall of the first bulge is provided with a convex or concave first clamping part, the side wall of the second groove is provided with a concave or convex second clamping part, and the first clamping part and the second clamping part are matched and clamped to limit the relative movement of the first clamping part and the second clamping part in the third direction; and/or the presence of a gas in the gas,

the bellied lateral wall of second is provided with protruding or sunken third joint portion, the lateral wall of first recess is provided with sunken or bellied fourth joint portion, third joint portion with fourth joint portion cooperation and joint to the restriction two is in relative motion in the third direction.

7. The buffer of claim 6,

the first clamping portion and the second clamping portion are triangular in cross section and comprise a first clamping surface and a second clamping surface, the first clamping surface is parallel to the first surface, and the second clamping surface is an inclined surface;

the distance between the second clamping surface and the side surface of the second main body against which the first connecting part abuts is gradually increased from one end of the second clamping surface, which is far away from the first surface, to one end of the second clamping surface, which is close to the first surface;

wherein the cross-section is parallel to the first direction and the third direction.

8. The buffer of claim 6,

the cross sections of the third clamping part and the fourth clamping part are triangular and comprise a third clamping surface and a fourth clamping surface, the third clamping surface is parallel to the first surface, and the fourth clamping surface is an inclined surface;

the distance between the fourth clamping surface and the side surface of the second main body, which is abutted against the first connecting part, is gradually increased from one end of the fourth clamping surface, which is close to the first surface, to one end of the fourth clamping surface, which is far away from the first surface;

wherein the cross-section is parallel to the first direction and the third direction.

9. The buffer of claim 1,

the first connecting part protrudes out of the first main body along the first direction, the second connecting part is formed by the second main body sinking towards the second end face of the first main body, and the first connecting part and the second connecting part are in concave-convex fit and clamped; or the like, or, alternatively,

the second connecting part protrudes out of the second main body along the first direction, the first connecting part is formed by the first main body sinking towards the first end face of the second main body, and the first connecting part and the second connecting part are matched in a concave-convex mode and clamped.

10. The buffer of claim 9,

the first connecting part and each edge of the first end face are respectively separated by a first preset distance;

the second connecting portion and each edge of the second end face are respectively spaced by the first preset distance.

11. The buffer of claim 10,

the side surface of the first connecting part, which is perpendicular to the first end surface, is a first side surface, and a convex or concave fifth clamping part is arranged on the first side surface;

the side surface of the second connecting part, which is perpendicular to the second end surface, is a second side surface, and a concave or convex sixth clamping part is arranged on the second side surface;

and the fifth clamping part and the sixth clamping part are matched and clamped to limit the relative movement of the fifth clamping part and the sixth clamping part in the first direction.

12. The buffer of claim 11,

the cross sections of the fifth clamping part and the sixth clamping part are triangular and comprise a fifth clamping surface and a sixth clamping surface, the fifth clamping surface is parallel to the first end surface, and the sixth clamping surface is an inclined surface;

the distance between the sixth clamping surface and the first side surface or the second side surface where the sixth clamping surface is located is gradually reduced from one end close to the first end surface to one end far away from the first end surface.

13. The buffer of claim 1,

the two first connecting parts of the first component are oppositely arranged in a second direction, and the two second connecting parts of the second component are oppositely arranged in the second direction; or the like, or, alternatively,

the two first connecting parts of the first component are arranged in an interlaced mode in a second direction, and the two second connecting parts of the second component are arranged in an interlaced mode in the second direction;

wherein the second direction is perpendicular to the first direction.

14. The buffer of claim 1,

the first body and the second body are the same in shape; or the like, or, alternatively,

the first body and the second body are different in shape.

15. A battery, comprising:

a plurality of battery cells;

the cushioning member of any of claims 1-14, disposed between adjacent ones of the cells.

16. An electric device, comprising:

the battery of claim 15.

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