Buffer component, module, battery and electrical device

Abstract

The present application provides a buffer component, a module, a battery and an electrical device, wherein the buffer component includes a component body, the component body at least having a first surface and a second surface arranged opposite to each other; the first surface and the second surface include a bonding area for contacting with an external component, and the end surface of at least part of the bonding area extends in a direction away from the external component to form a deformation release area. In the buffer component of the present application, the bonding area and the deformation release area are arranged in different planes, and when arranged between external components, a receiving space is formed. After the external component expands, it can squeeze into the receiving space and disperse the pressure, so that the buffer component is not easily squeezed out.

Description

Technical Field

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

[0002] The battery module has a plurality of battery cells electrically connected to each other, and two battery cells are electrically connected together through a connecting sheet. Buffer pads are usually arranged between adjacent battery cells to provide initial pre-tightening force for the battery cells.

[0003] During the battery cell cyclic swelling process, the middle area of ​​the battery swells more, which will tend to squeeze the cushion outward, causing the cushion to be squeezed and deformed, and eventually squeezed out between the battery cells. After the cushion is squeezed out, the appearance of the battery is abnormal and the external structure is easily damaged. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present application provides a buffer component, a module, a battery and an electrical device, which can solve the problem that when the external components expand, the buffer components between adjacent external components are squeezed out, resulting in the failure of the buffer components.

[0005] According to the first aspect of the present application, a buffer component is provided, comprising: a component body, the component body having at least a first surface and a second surface arranged opposite to each other; the first surface and the second surface include a bonding area for contacting an external component, and the end surface of at least part of the bonding area extends in a direction away from the external component to form a deformation release area.

[0006] In the technical solution of the embodiment of the present application, the first surface and the second surface of the buffer component are respectively facing the external components on both sides, and are bonded to the external components on both sides through the bonding areas of the first surface and the second surface. The setting of the deformation release area can form an accommodating space between the first surface, the second surface and the external components. After the external components expand and deform, they can squeeze into the accommodating space, releasing and dispersing the pressure borne by the component body, thereby preventing the buffer component from being squeezed out between the external components due to excessive pressure.

[0007] In some embodiments, the deformation release zone is located in the middle area of ​​the component body in the extension direction, and the bonding area is located on both sides of the middle area; the end surface of the deformation release zone is lower than the end surfaces of the bonding areas on both sides thereof. The deformation release zone and the bonding area form a concave structure, thereby forming an accommodation space, and the external component can be squeezed into the accommodation space after expansion and deformation.

[0008] In some embodiments, the position where the deformation release area is connected to the bonding area is in an arc transition. The technical solution of this embodiment can avoid the formation of sharp edges and corners on the component body, so as to avoid the problem of stress concentration on the external parts.

[0009] In some embodiments, the deformation release area and the bonding area are spaced apart in the extension direction of the component body, and are wavy in shape as a whole. The wavy structure can avoid sharp edges and corners, so that when the battery cell presses the component body, the pressure can be relatively dispersed on the curved surface to avoid stress concentration on the battery cell.

[0010] In some embodiments, a coating layer is provided on the first surface and the second surface of the component body, and the coating layer is provided on the bonding area and extends to cross the deformation release area. The coating layers on the first surface and the second surface are used to bond the component body to the external components on both sides, strengthen the connection strength, and facilitate installation.

[0011] In some embodiments, in the initial state, the bonding area is configured to be bonded to the external component; the deformation release area is configured not to be bonded to the external component. In the scheme where the deformation release area is lower than the bonding area, in the initial state, the deformation release area is not bonded to the external component to form a receiving space, and the external component is bonded to the deformation release area after expansion and deformation.

[0012] In some embodiments, the deformation release area is an inclined surface, and the inclined surface extends from the inside to the outside in a direction perpendicular to the extension direction of the component body in a manner of gradually moving away from the external component. The inclined deformation release area has a larger bonding area with the external component, which can increase the structural strength when the deformation release area is bonded to the external component.

[0013] In some embodiments, the deformation release area is located in the middle area of ​​the bonding area, and the end surface of the deformation release area is higher than the end surface of the bonding area, forming a step surface at the connection position of the two. The deformation release area is higher than the bonding area, which can concentrate more pressure when the external component expands on the deformation release area and disperse the pressure borne by the bonding area. The thickness of the deformation release area is relatively thick, the ability to bear pressure is relatively strong, and it is not easy to deform.

[0014] In some embodiments, in the initial state, the bonding area and the deformation release area of ​​the component body are both bonded to the external component. The bonding area and the deformation release area are bonded to the external component at the same time, and the bonding area is large, so that the component body and the external component have a strong connection strength.

[0015] In some embodiments, the buffer member is a frame structure, and the deformation release zone is arranged on at least part of the side of the frame structure. When the external component, such as a battery cell, expands, the middle part bulges outward to squeeze the frame structure, and the squeezing force on the frame structure is dispersed from the middle to the surroundings, and there is a mutual restraint force between the sides of the frame structure, so that the force on the frame structure is balanced, so that it is not easy to be squeezed out between the external components.

[0016] In some embodiments, the deformation release area is arranged on the side edges of the frame structure on two opposite sides; and the rest of the frame structure is the bonding area.

[0017] According to a second aspect of the present application, a module is provided, comprising at least a first external component and a second external component, and a buffer component, wherein the buffer component is bonded between the first external component and the second external component.

[0018] According to a third aspect of the present application, a battery is further provided, comprising at least two battery cells and a buffer member, wherein the buffer member is bonded between two adjacent battery cells.

[0019] In some embodiments, the buffer member is bonded to the edge of the battery cell. When the battery cell expands, the middle part bulges outward, generating a stronger squeezing force, while the squeezing force at the edge is relatively small. Therefore, the pressure on the buffer member when bonded to the edge of the battery cell is relatively small.

[0020] According to a fourth aspect of the present application, there is also provided an electrical device, comprising a battery, wherein the battery is used to provide electrical energy.

[0021] The buffer component provided by the present application bears the pressure of the external components on both sides respectively through the first surface and the second surface, thereby playing a buffering role between the external components; the external components are bonded to the bonding areas of the first surface and the second surface in the initial state, and because the deformation release area and the bonding area are not on the same plane, a holding space is formed between the external component and the first surface and the second surface, and the external component applies pressure to the bonding area after expansion and deformation, and its expanded part can be squeezed into the holding space and release part of the pressure; the deformation release area can also bear the pressure of the external components, so that the pressure of the external components is dispersed on the component body, thereby avoiding the buffer component from bearing excessive pressure locally and being squeezed out between the external components.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 is an exploded view of a battery provided in one embodiment of the present application;

[0025] Figure 2 is a schematic structural diagram of a buffer component provided in one embodiment of the present application;

[0026] Figure 3is a side view of a buffer member provided in one embodiment of the present application;

[0027] Figure 4 is a schematic structural diagram of a buffer component provided in one embodiment of the present application;

[0028] Figure 5 It is a schematic diagram of the structure of the adhesive layer provided in one embodiment of the present application;

[0029] Figure 6 It is a structural schematic diagram of a component body and a rubber coating provided in one embodiment of the present application;

[0030] Figure 7 It is a structural schematic diagram of a component body and a rubber coating provided in one embodiment of the present application;

[0031] Figure 8 is a cross-sectional view of a coating layer provided in one embodiment of the present application;

[0032] Fig. 9 is a schematic structural diagram of a buffer component provided in one embodiment of the present application;

[0033] Fig.10 It is a schematic diagram of a battery expansion state provided in one embodiment of the present application.

[0034] Figures 1 to 10 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0035] 1. Component body; 11. First surface; 12. Second surface; 101. Adhesive area; 102. Deformation release area; 2. Adhesive layer; 21. Base material; 22. Adhesive film; 3. Battery cell. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0042] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0043] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0044] The present application provides a buffer component, including a component body, wherein the component body has at least two oppositely disposed first surfaces and second surfaces, wherein the first surface and the second surface are respectively used to bear the pressure of different external components and can play a buffering role between the external components.

[0045] The buffer member can be applied between external components that need buffer protection. Under certain conditions, the external components expand and deform, causing compression on the buffer member. In order to prevent the buffer member from being squeezed out after the external components expand, in the technical solution of this application, deformation release areas are set on the first surface and the second surface of the buffer member. When the external components expand under certain conditions, they expand toward the deformation release area to disperse the pressure borne by the component body, thereby preventing the buffer member from being squeezed out between the external parts.

[0046] The external components may be, but are not limited to, metal or non-metal materials that expand under heat, batteries, airbags, and other devices. Among them, the battery can be used to supply power to electrical equipment such as industrial systems and vehicles. Specifically, the electrical equipment may be mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, and the like.

[0047] The above-mentioned external components are only examples and are not limited in this application. Those skilled in the art can apply the buffer component to other external components as needed. In the following embodiments, this application takes the external component as a battery as an example to introduce in detail the specific structure and principle of the buffer component of this application.

[0048] The battery may include a plurality of battery cells connected by electrical connection, and the buffer member is arranged between two adjacent battery cells. The battery cell gradually expands during the charge and discharge cycle, squeezing the buffer member. The expansion area of ​​the battery cell is located in the middle of the battery cell, and when it expands, it forms an extrusion force from the inside to the outside on the buffer member.

[0049] See attached Figures 1 to 3 , Figure 1 Shown is an exploded view of a battery. Figure 2 FIG. 1 is a schematic diagram of the overall structure of the buffer component disclosed in this embodiment. Figure 3 It is a side view of the buffer component disclosed in this embodiment. The component body 1 includes at least a first surface 11 and a second surface 12 arranged opposite to each other, which are respectively used to correspond to different battery cells 3. The first surface 11 and the second surface 12 include a bonding area 101, which is used to contact the battery cell 3 and bear the pressure of the battery cell 3. The component body 1 has a certain elastic deformation ability, and when the external parts are collided or dropped, it can play a buffering role between adjacent external parts. The material of the component body 1 includes but is not limited to rubber, resin, etc.

[0050] The first surface 11 and the second surface 12 include a bonding area 101 for contacting the battery cell, and the component body 1 is bonded to the battery cell 3 through the bonding area 101. The end surface of at least part of the bonding area 101 extends in a direction away from the battery cell 3 to form a deformation release area 102. The bonding area 101 and the deformation release area 102 are located on different planes, both facing the corresponding battery cell 3, but at different distances from the battery cell 3.

[0051] In the initial state, the battery cell 3 is connected to the bonding area 101 and forms a certain accommodation space with the deformation release area; after the battery cell 3 expands under certain conditions, the expanded part squeezes into the accommodation space to avoid excessive pressure on the bonding area 101 and being squeezed out between the battery cells 3. In addition, after the expanded part of the battery cell 3 squeezes into the accommodation space, the pressure can be further dispersed to the deformation release area 102 to prevent the component body 1 from being locally subjected to excessive pressure.

[0052] In some embodiments, reference Figure 2 , Figure 3 The bonding area 101 and the deformation release area 102 on the first surface 11 and the bonding area 101 and the deformation release area 102 on the second surface 12 can be symmetrically arranged so that the areas where the battery cells 3 on both sides apply pressure to the component body 1 correspond, and the component body 1 can be evenly stressed.

[0053] The component body 1 can be configured as a sheet, strip, rod or frame structure. The bonding area 101 and the deformation release area 102 are adjacently arranged, for example, the bonding area 101 and the deformation release area 102 are respectively arranged at the two ends close to the component body 1, or the bonding area 101 and the deformation release area 102 are alternately arranged on the component body 1. The above-mentioned component body 1 structure and the relative positions of the bonding area 101 and the deformation release area 102 are examples and are not limited thereto.

[0054] In some embodiments, reference Figure 2 , Figure 3 The deformation release area 102 can be arranged in the middle area in the extension direction of the component body 1, and the bonding area 101 is arranged on both sides of the deformation release area 102, and the end surface of the deformation release area 102 is lower than the end surfaces of the bonding areas 101 on both sides thereof. Among them, the end surfaces of the bonding area 101 and the end surfaces of the deformation release area 102 are both facing the corresponding battery cell 3. The bonding area 101 and the deformation release area 102 form a concave structure.

[0055] The bonding areas 101 on both sides are connected to the battery cell 3. In the initial state, there is a holding space between the battery cell 3 and the deformation release area 102. After the battery cell 3 expands, pressure is applied to the bonding areas 101 on both sides, and the expanded part squeezes into the holding space, dispersing the pressure to the deformation release area 102 to avoid the pressure being concentrated in the bonding area 101.

[0056] In some embodiments, reference Figure 3 , the position where the deformation release area 102 and the bonding area 101 are connected is an arc transition to avoid forming sharp edges and corners. When the battery cell 3 squeezes the component body 1, the pressure is easily concentrated at the connection between the deformation release area 102 and the bonding area 101, and a large reaction force is caused to the battery cell 3, which is easy to cause damage to the battery cell 3. After the position where the deformation release area 102 and the bonding area 101 are connected is set to an arc transition structure, sharp edges and corners can be avoided, reducing the damage caused by the reaction force of this part to the battery cell 3.

[0057] In some embodiments, reference Figure 4In the structural schematic diagram of the buffer member shown in FIG. 1 , the deformation release area 102 and the bonding area 101 are spaced apart in the extension direction of the member body 1, and the deformation release area 102 is lower than the bonding area 101. The end faces of the deformation release area 102 and the bonding area 101 can be planes or curved surfaces, so that the whole is formed into a sawtooth shape or a wave shape. In the initial state of the battery cell, the bonding area 101 is in contact with the battery cell 3, and a receiving space is formed between the deformation release area 102 and the battery cell 3. After the battery cell 3 expands, it squeezes into the receiving space, thereby dispersing the pressure applied to the bonding area 101. In addition, the deformation release area 102 and the bonding area 101 on the first surface 11 and the second surface 12 can be symmetrically distributed so that the member body 1 is evenly stressed, so as to avoid being squeezed by the battery cells 3 on both sides and deviating to one side due to uneven stress, causing the member body 1 to be squeezed out between the battery cells 3.

[0058] The deformation release area 102 and the bonding area 101 are set to be a wave shape composed of a curved surface, which can avoid sharp edges and corners, so that when the battery cell 3 presses the component body 1, the pressure can be relatively dispersed on the curved surface to avoid stress concentration on the battery cell 3. The wavy curved surface can be set to a curved surface of a sine curve structure, and the bonding area 101 is located at the peak of the sine curve structure, and the portion below the bonding area 101 is the deformation release area 102.

[0059] The wavy curved surface can also be composed of multiple curved surfaces, which are connected along the extension direction of the component body 1 and protrude toward the corresponding battery cell 3. The bonding area 101 is located in the protruding part in the middle of the curved surface, and the deformation release area 102 is located on both sides of the curved surface. On the wavy curved surface composed of multiple curved surfaces, the bonding area 101 can be made denser, thereby increasing the bonding area with the battery cell 3 and increasing the connection strength.

[0060] Figure 5 The schematic diagram of the structure of the adhesive layer is shown. Figure 6 , Figure 7 The structure diagram of the component body and the adhesive layer is shown. Figure 5-7 , a coating layer 2 is provided on the first surface 11 and the second surface 12 of the component body 1, and the first surface 11 and the second surface 12 can be bonded to the battery cell 3 through the coating layer 2. The coating layer 2 is at least provided in the bonding area 101, and the battery cell 3 is bonded to the bonding area 101 through the coating layer 2. The coating layer 2 can be set to a shape adapted to the component body 1, and the coating layer 2 can fit the first surface 11 and the second surface 12, and cover the bonding area 101 and the deformation release area 102 at the same time. The coating layer 2 includes but is not limited to adhesives, adhesive strips, etc., and those skilled in the art can make a selection based on the prior art.

[0061] Figure 8A cross-sectional view of the adhesive layer is shown. In some embodiments, Figure 8 The adhesive layer 2 is arranged in the bonding area 101 and extends to cross the deformation release area 102. The adhesive layer 2 includes a substrate 21 and an adhesive film 22. The adhesive film 22 is arranged on opposite sides of the substrate 21 to form a double-sided adhesive. One layer of the adhesive film 22 of the adhesive layer 2 is bonded to the bonding area 101, and the other layer of the adhesive film 22 is bonded to the battery cell 3. The material of the substrate 21 includes but is not limited to PET, PC, PE, etc., and the material of the adhesive film 22 includes but is not limited to PA, PO, EVA, etc. Those skilled in the art can make a selection based on the existing technology.

[0062] In some embodiments, reference Figure 6 , Figure 7 In the initial state, the bonding area 101 is configured to be bonded to the battery cell 3, the deformation release area 102 is lower than the bonding area 101, and the adhesive layer 2 crosses the deformation release area 102, so the deformation release area 102 is configured so that the battery cell 3 is not bonded. When the battery cell 3 expands, its expanded part squeezes and deforms the adhesive layer 2, and squeezes into the accommodation space at the deformation release area 102, and the battery cell 3 can be bonded to the deformation release area 102 through the adhesive layer 2. The deformation release area 102 can both disperse the pressure applied by the battery cell 3 and increase the bonding area with the battery cell 3, thereby strengthening the connection strength between the battery cell 3 and the component body 1. The adhesive force of the adhesive layer 2 can overcome the pressure applied by the battery cell 3 to the component body 1, so that the component body 1 is not squeezed out between two adjacent battery cells 3.

[0063] Fig. 9 FIG. 1 is a schematic diagram of a structure of a buffer component. In some embodiments, referring to Fig. 9 , the deformation release area 102 is an inclined surface, and the inclined surface extends from the inside to the outside in a manner of gradually moving away from the battery cell 3 in a direction perpendicular to the extension direction of the component body 1. In this embodiment, in the initial state, both the bonding area 101 and the deformation release area 102 can be bonded to the battery cell 3. The inclined surface has a larger area than the plane, and can provide a larger bonding area for the deformation release area 102, thereby increasing the bonding strength between the deformation release area 102 and the battery cell 3.

[0064] In a specific embodiment, referring to Fig. 9, the deformation release zone 102 is located in the middle area of ​​the bonding zone 101, or in other words, the deformation release zone 102 is located in the middle area of ​​the extension direction of the component body 1, and the bonding zone 101 is located on both sides of the deformation release zone 102. And the end face of the deformation release zone 102 is higher than the end face of the bonding zone 101, and a step surface is formed at the connection between the two. The structure at the deformation release zone 102 is relatively thick, with strong structural strength and bearing capacity, and is not easy to deform. In addition, the pressure of the battery cell 3 is more concentrated in the deformation release zone 102, so that the deformation release zone 102 can bear more pressure, reduce the load of the bonding zone 101, so that the bonding zone 101 can not be squeezed out between the battery cells 3.

[0065] In a specific embodiment, in the initial state, the bonding area 101 and the deformation release area 102 of the component body 1 are both bonded to the battery cell 3. The surface of the battery cell 3 has a certain elasticity, so in the initial state, the battery cell 3 can be bonded to the bonding area 101 and the deformation release area 102 at the same time. At the step surface, a certain accommodation space can be formed between the bonding area 101 and the battery cell 3, and the battery cell 3 can be squeezed into the accommodation space after expansion and deformation, so as to disperse the pressure applied to the deformation release area 102 to a certain extent.

[0066] In a specific embodiment, referring to Fig. 9 The deformation release area 102 and the bonding area 101 of the first surface 11 and the second surface 12 are symmetrically arranged, so that the deformation release area 102 forms a wedge-shaped structure protruding from the first surface 11 and the second surface 12. The thicker side of the wedge-shaped structure has a relatively higher structural strength and a relatively stronger bearing capacity.

[0067] In some embodiments, reference Figure 2 , Figure 4 , Fig. 9 The buffer component can be a frame structure, the first surface 11 and the second surface 12 are both frame-shaped planes, the deformation release area 102 is arranged on at least part of the side of the frame structure, and the bonding area 101 is also arranged on at least part of the side of the frame structure. The component body 1 can be set to any frame structure, such as circular, triangular, rectangular, etc., and there is no specific limitation in this application. The frame structure can be an integrally processed structure, or a structure in which each side is fixedly connected, and its connection method includes but is not limited to bonding, hot melt connection, screw fixing, etc.

[0068] Fig.10The diagram shows the battery expansion state. When two adjacent battery cells 3 expand, the middle part bulges toward the buffer component, causing pressure perpendicular to the first surface 11 and the second surface 12, as well as pressure radiating from the middle to the surroundings. After the middle part of the battery cell 3 expands, it can squeeze the inner side of the side of the buffer component outward. The side edges of the buffer component of the frame structure have mutually restrictive binding forces, and the pressure of the battery cell 3 on the buffer component is dispersed to the surroundings, and the overall force is relatively balanced, thereby effectively preventing the buffer component from being squeezed out.

[0069] The bonding area 101 and the deformation release area 102 can fully cover the first surface 11 and the second surface 12 of the frame structure, and the relative position between the bonding area 101 and the deformation release area 102 can be set arbitrarily, and the present application does not limit this. For example, when the frame structure is rectangular, the bonding area 101 is set on two opposite sides, and the deformation release area 102 is set on the other two opposite sides.

[0070] In some embodiments, reference Figure 2 , Figure 4 , Fig. 9 , the deformation release area 102 is arranged on the sides of the frame structure on both sides, and the rest of the frame structure is the bonding area 101. Specifically, the deformation release area 102 can be arranged in the middle area of ​​the two sides of the frame structure, or it can be arranged on the two sides of the frame structure at intervals from the bonding area 101. In this embodiment, the bonding area 101 can have a larger area to ensure stable bonding with the battery elevator 3; the deformation release area 102 is distributed more dispersedly, which can disperse the pressure of the battery cell 3.

[0071] In a specific embodiment, referring to Figure 2 The buffer member is a rectangular frame structure, the deformation release area 102 is arranged in the middle area of ​​the two opposite sides thereof, the bonding area 101 is arranged in the rest of the frame structure, and the bonding area 101 and the deformation release area 102 on the first surface 11 and the second surface 12 are symmetrically arranged. The end surface of the deformation release area 102 is lower than the end surface of the bonding area 101, and a receiving space is formed above the deformation release area 102. The adhesive layer 2 is arranged in the bonding area 101 of the first surface 11 and the second surface 12, and extends to cross the deformation release area 102.

[0072] In the initial state, the battery cell 3 is bonded to the bonding area 101 through the adhesive layer 2, and is not bonded to the deformation release area 102; after the battery cell 3 expands, it squeezes the frame structure from the middle to the surrounding areas, so that the force on the frame structure is relatively balanced, and part of the pressure is dispersed to the deformation release area 102 to release the pressure, thereby effectively preventing the buffer component from being squeezed out from between the battery cells 3.

[0073] In another specific embodiment, referring to Figure 4 The buffer member is a rectangular frame structure, in which the bonding area 101 and the deformation release area 102 are spaced apart in the extension direction of the side on the opposite sides, and the whole is wavy, and the other two sides are set as the bonding area 101, and the bonding area 101 and the deformation release area 102 on the first surface 11 and the second surface 12 are symmetrically arranged. The end surface of the deformation release area 102 is lower than the end surface of the bonding area 101. The adhesive layer 2 is arranged on the bonding area 101 of the first surface 11 and the second surface 12, and extends to cross the deformation release area 102.

[0074] In the initial state, the battery cell 3 is bonded to the bonding area 101 through the adhesive layer 2, and is not bonded to the deformation release area 102; after the battery cell 3 expands, it squeezes the frame structure from the middle to the surrounding areas, so that the force on the frame structure is relatively balanced, and part of the pressure is dispersed to the deformation release area 102, and the pressure is released, thereby effectively preventing the buffer component from being squeezed out from between the battery cells 3.

[0075] In another specific embodiment, referring to Fig. 9 , the buffer member is a rectangular frame structure, the deformation release area 102 is arranged in the middle area of ​​the opposite sides, and the bonding area 101 is arranged in the rest of the frame structure. The end face of the deformation release area 102 is an inclined surface higher than the end face of the bonding area 101, and a step surface is formed at the connection position of the two, and the inclined surface extends from the inside to the outside in a manner gradually away from the battery cell 3 in the extension direction perpendicular to the side. The bonding area 101 and the deformation release area 102 on the first surface 11 and the second surface 12 are symmetrically arranged so that a wedge-shaped structure with a relatively thick inner side and a relatively thin outer side is formed at the deformation release area 102. The adhesive layer 2 is arranged on the bonding area 101 and the deformation release area 102 of the first surface 11 and the second surface 12. In the initial state, the bonding area 101 and the deformation release area 102 are bonded to the battery cells 3 on both sides through the adhesive layer 2.

[0076] On the inner side of the side of the buffer component, the deformation release area 102 has a larger area. After the battery cell 3 expands, the pressure can be relatively concentrated in the deformation release area 102, reducing the pressure borne by the bonding area 101. The wedge-shaped structure is relatively thick on the inner side of the side, with high structural strength, not easy to deform, and can bear greater pressure, so it is not easy to be squeezed out between the battery cells 3.

[0077] The present application also provides a module, comprising at least a first external component and a second external component, and the above-mentioned buffer component, wherein the buffer component is bonded between the first external component and the second external component, and can buffer vibration when the module is hit or falls, thereby protecting the first external component and the second external component.

[0078] The present application also provides a battery, comprising at least two battery cells 3 and the above-mentioned buffer member. The buffer member is bonded between two adjacent battery cells 3 to play a buffering role and buffer vibration when the battery is hit or dropped.

[0079] A shell is provided on the outside of the battery cell 3. When the battery cell 3 expands, the restraining force at the middle position of the shell is weaker, and the restraining force at the edge position is stronger. Therefore, the middle part of the battery cell 3 bulges outward, and the generated extrusion force is stronger. In some embodiments, the buffer component is bonded to the edge position of the battery cell 3, and the edge position of the battery cell 3 expands relatively less, so the pressure borne by the buffer component is relatively small.

[0080] Since the component body 1 has a certain elastic deformation capacity and can be deformed after being squeezed by the battery cell 3, in some embodiments, the deformation buffer zone 102 of the component body 1 is constructed to be squeezed by the battery cell 3 to the same thickness as other positions of the buffer component in the later stage of the expansion of the battery cell 3. For example, in an embodiment in which the deformation buffer zone 102 and the bonding area 101 are wavy as a whole, the deformation buffer zone 102 can be as thick as the bonding area 101 after being squeezed and deformed by the battery cell 3.

[0081] The battery also includes a box body arranged outside the battery cells 3. The bottom of the battery cells 3 can be bonded to the bottom plate of the box body by structural adhesive, and the buffer member is arranged between the sides of adjacent battery cells 3. When the battery is assembled, the structural adhesive is applied on the bottom of the box body, and then the battery cells 3 are placed in the box body. The structural adhesive has slight fluidity in a short time, and can overflow into the gaps between the battery cells 3 after being squeezed by the battery cells 3. The buffer member can play a role in blocking the structural adhesive, preventing the structural adhesive from overflowing into the gaps between the adjacent battery cells 3, and directly bonding the adjacent battery cells 3 together.

[0082] In the battery of the present application, the buffer member is set as a frame structure, and the deformation buffer zone 102 is set on opposite sides of the frame structure. The deformation buffer zones 102 on both sides are respectively oriented to the left and right sides of the battery cell 3 to prevent the structural glue at the bottom of the battery cell 3 from overflowing into the battery cells 3 through the deformation buffer zone 102.

[0083] The present application also provides an electrical device, including the above-mentioned battery, the battery is used to provide electrical energy. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.

[0084] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present application is defined by the appended claims.

Claims

1. A buffer member, characterized in that: include: A component body, the component body having at least a first surface and a second surface arranged opposite to each other; the first surface and the second surface include a bonding area for contacting with an external component, and end surfaces at least part of the bonding area extend in a direction away from the external component to form a deformation release area; The deformation release area and the bonding area are spaced apart and distributed in the extension direction of the component body, and are wavy in shape as a whole.

2. The buffer member according to claim 1, characterized in that: The deformation release zone is located in the middle area in the extension direction of the component body, and the bonding areas are located on both sides of the middle area; the end surface of the deformation release zone is lower than the end surfaces of the bonding areas on both sides thereof.

3. The buffer member according to claim 1, characterized in that: The position where the deformation release area is connected to the bonding area is in an arc transition.

4. The buffer member according to any one of claims 1 to 3, characterized in that: An adhesive coating is provided on the first surface and the second surface of the component body. The adhesive coating is provided in the bonding area and extends to cross the deformation release area.

5. The buffer member according to any one of claims 1 to 3, characterized in that: In an initial state, the bonding area is configured to be bonded to the external component; and the deformation release area is configured not to be bonded to the external component.

6. The buffer member according to any one of claims 1 to 3, characterized in that: The deformation release area is an inclined surface, and the inclined surface extends from the inside to the outside in a direction perpendicular to the extension direction of the component body in a manner of gradually moving away from the external component.

7. The buffer member according to any one of claims 1 to 3, characterized in that: The deformation release zone is located in the middle area of ​​the bonding zone, and the end surface of the deformation release zone is higher than the end surface of the bonding zone, forming a step surface at the connection position of the two.

8. The buffer member according to any one of claims 1 to 3, characterized in that: In an initial state, the bonding area and the deformation release area of ​​the component body are both bonded to the external component.

9. The buffer member according to any one of claims 1 to 3, characterized in that: The buffer component is a frame structure, and the deformation release area is arranged on at least a part of the side of the frame structure.

10. The buffer member according to any one of claims 1 to 3, characterized in that: The deformation release area is arranged on the side edges of the frame structure at two opposite sides; the remaining part of the frame structure is the bonding area.

11. A module, characterized in that: The invention comprises at least a first outer component and a second outer component, and a buffer member according to any one of claims 1 to 10, wherein the buffer member is bonded between the first outer component and the second outer component.

12. A battery, characterized in that: The invention comprises at least two battery cells and the buffer member according to any one of claims 1 to 10, wherein the buffer member is bonded between two adjacent battery cells.

13. The battery according to claim 12, characterized in that The buffer member is bonded to the edge of the battery cell.

14. The battery according to claim 12 or 13, characterized in that: The deformation relief area is configured to be pressed by the battery cell to have the same thickness as other positions of the buffer member in a later stage of expansion of the battery cell.

15. An electrical device, characterized in that: include: The battery according to any one of claims 12 to 14, wherein the battery is used to provide electrical energy.

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