Buffer structure for battery cell, battery cell assembly, battery and power equipment

Abstract

The utility model discloses a buffer structure for a battery cell, a battery cell assembly, a battery and power equipment, the buffer structure comprises a first buffer piece, a first corner and a second corner are formed on the first buffer piece, a first inclined surface is formed on the first corner, a second inclined surface is formed on the second corner, and the first inclined surface is provided with a first groove; the first inclined face and the second inclined face are obliquely arranged in the thickness direction of the first buffering piece in the direction away from each other. The second buffer part is arranged on one side of the first buffer part and forms a first matching surface and a second matching surface, the first matching surface is attached to the first inclined surface, and the second matching surface is attached to the second inclined surface. According to the buffer structure disclosed by the utility model, the first inclined surface and the second inclined surface are respectively and obliquely arranged along the thickness direction of the first buffer piece in the direction far away from each other, so that the buffer structure can generate force opposite to the stress direction along the inclined directions of the first inclined surface and the second inclined surface when being stressed, and the battery cell is fixed on the battery shell.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a buffer structure for a battery cell, a battery cell assembly, a battery and a power device. Background Art

[0002] Among the related technologies, CTP integration technology is the mainstream development direction of the current industry. The CTP integrated structure is a parallel arrangement of cells, which directly forms a battery pack, greatly increasing the space utilization and energy density of the battery pack. However, under current technical conditions, the buffer material between the cells in the CTP integrated structure is a single homogeneous material. The friction generated by the buffer material after the cell is compressed is evenly distributed on the cell plane. Therefore, the cell also needs to be bonded to the box with a thermally conductive structural adhesive to improve the stability and reliability of the CTP integrated battery. However, there will be problems such as difficulty in removing the cell and difficulty in repairing the cell. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a buffer structure for a battery cell. According to the buffer structure of the utility model, the first inclined surface and the second inclined surface are respectively arranged in a direction away from each other along the thickness direction of the first buffer member, so that when the buffer structure is subjected to force, a force opposite to the direction of force can be generated along the inclined direction of the first inclined surface and the second inclined surface, thereby fixing the battery cell on the battery housing.

[0004] The present application also proposes a battery cell assembly having the above buffer structure.

[0005] The present application also provides a battery having the above-mentioned battery cell.

[0006] The present application also proposes a power device having the battery.

[0007] According to the utility model, the buffer structure for the battery cell includes: a first buffer member, a first corner and a second corner are formed on the first buffer member, a first inclined surface is formed on the first corner, a second inclined surface is formed on the second corner, the first inclined surface and the second inclined surface are respectively arranged obliquely along the thickness direction of the first buffer member in a direction away from each other; a second buffer member, the second buffer member is arranged on one side of the first buffer member and is formed with a first mating surface and a second mating surface, the first mating surface is in contact with the first inclined surface, and the second mating surface is in contact with the second inclined surface.

[0008] According to the buffer structure of the utility model, a first inclined surface and a second inclined surface are formed on the first buffer component, and the first inclined surface and the second inclined surface are respectively inclined along the thickness direction of the first buffer component in a direction away from each other. The second buffer component is arranged on one side of the first buffer component and is formed with a first mating surface and a second mating surface. The first mating surface is in contact with the first inclined surface, and the second inclined surface is in contact with the second mating surface. The buffer structure is arranged on the battery cell. When the battery cell is subjected to a force from the same inclination direction as the first inclination direction or the second inclination direction, the buffer structure in the present application can generate a force in the opposite direction to the force applied to the battery cell along the inclination direction of the first inclination direction or the second inclination direction, and the force generated by the buffer structure is proportional to the magnitude of the force applied to the battery cell, thereby fixing the battery cell in the shell and improving the stability and reliability of the battery cell in the shell.

[0009] According to an embodiment of the present invention, the first inclined surface and the second inclined surface have opposite inclination directions in the thickness direction of the first buffer member.

[0010] According to one embodiment of the utility model, the first buffer is constructed as a polygon, and a plurality of corners are sequentially arranged on the outer circumference of the first buffer, wherein two adjacent corners are constructed as the first corner and the second corner; or two corners arranged at intervals are constructed as the first corner and the second corner.

[0011] According to one embodiment of the utility model, the first angle is respectively formed with the first inclined surfaces on both sides in the thickness direction; the second angle is respectively formed with the second inclined surfaces on both sides in the thickness direction; wherein the second buffer is constructed into two and respectively arranged on both sides in the thickness direction of the first buffer, and the surfaces of the two second buffers facing the first buffer are respectively formed with the first mating surface and the second mating surface.

[0012] According to an embodiment of the present utility model, the first buffer component is configured as an elastic component.

[0013] According to an embodiment of the present invention, the second buffer component is made of hard plastic material.

[0014] The battery cell assembly according to the utility model is briefly described below.

[0015] The battery cell assembly according to the utility model includes the buffer structure described in any one of the above embodiments. The battery cell assembly includes a battery cell, and the second buffer member is attached to the battery cell. Since the battery according to the utility model is provided with the buffer structure described in any one of the above embodiments, the battery cell of the battery cell assembly is easy to disassemble, and the maintenance of the battery cell is more convenient and quick, with low maintenance cost, so that the battery cell assembly has a longer service life, good stability, strong reliability and high safety.

[0016] According to an embodiment of the present invention, the battery core further includes: a heat conducting member, wherein the heat conducting member is disposed at the bottom of the battery core.

[0017] The battery according to the utility model is briefly described below.

[0018] The battery according to the utility model is provided with the battery cell assembly described in any one of the above embodiments. Since the battery according to the utility model is provided with the battery cell assembly described in any one of the above embodiments, the battery according to the present application has low difficulty in disassembling the battery cell, and the repair and maintenance is more convenient and quick, and the repair cost is low, so that the battery has a long service life, good stability, strong reliability and high safety.

[0019] The power equipment according to the utility model is briefly described below.

[0020] The power equipment according to the utility model is provided with a battery as described in any one of the above embodiments. Since the power equipment according to the utility model is provided with a battery as described in any one of the above embodiments, the power equipment according to the present application has a long service life, good safety and high reliability.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a buffer structure according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a battery cell assembly of a buffer structure according to an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of a battery cell and a buffer structure after being bonded together according to a buffer structure of one embodiment of the utility model.

[0026] Reference numerals:

[0027] Buffer structure 1;

[0028] A first buffer 11, a first inclined surface 111, and a second inclined surface 112;

[0029] The second buffer member 12, the first mating surface 121, and the second mating surface 122;

[0030] Battery cell assembly 2;

[0031] Battery core 13 , end plate 14 , heat conducting member 15 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] Among the related technologies, CTP integration technology is the mainstream development direction of the current industry. The CTP integrated structure is a parallel arrangement of cells, which directly forms a battery pack, greatly increasing the space utilization and energy density of the battery pack. However, under current technical conditions, the buffer material between the cells in the CTP integrated structure is a single homogeneous material. The friction generated by the buffer material after the cell is compressed is evenly distributed on the cell plane. Therefore, the cell also needs to be bonded to the box with a thermally conductive structural adhesive to improve the stability and reliability of the CTP integrated battery. However, there will be problems such as difficulty in removing the cell and difficulty in repairing the cell.

[0034] Reference below Figure 1-Figure 3 A buffer structure for a battery cell according to an embodiment of the utility model is described.

[0035] According to the utility model, the buffer structure 1 for the battery cell 13 includes: a first buffer member 11 and a second buffer member 12, the first buffer member 11 is formed with a first angle and a second angle, the first angle is formed with a first inclined surface 111, and the second angle is formed with a second inclined surface 112, the first inclined surface 111 and the second inclined surface 112 are respectively arranged along the thickness direction of the first buffer member 11 in a direction away from each other; the second buffer member 12 is arranged on one side of the first buffer member 11 and is formed with a first mating surface 121 and a second mating surface 122, the first mating surface 121 is in contact with the first inclined surface 111, and the second mating surface 122 is in contact with the second inclined surface 112.

[0036] In some specific embodiments, the buffer structure 1 includes a first buffer member 11 and a second buffer member 12 that are sequentially connected and fitted together, the first buffer member 11 is formed with a first angle and a second angle, and the first angle and the second angle are respectively formed with a first inclined surface 111 and a second inclined surface 112, the first inclined surface 111 and the second inclined surface 112 are respectively inclined in a direction away from each other along the thickness direction of the first buffer member 11, a second buffer member 12 is also pasted on one side of the first buffer member 11, the second buffer member 12 has the same shape and size as the first buffer member 11, a first mating surface 121 having the same inclination direction as the first inclined surface 111 is formed on the second buffer member 12, and a first mating surface 122 having the same inclination direction as the first inclined surface 111 is also formed on the second buffer member 12. The second bevel 112 has the same inclination direction as the second mating surface 122, the first mating surface 121 is in contact with the first bevel 111, and the second bevel 112 is in contact with the second mating surface 122. The buffer structure 1 is arranged on the battery cell 13. When the battery cell 13 is subjected to a force from the same inclination direction as the first bevel 111 or the second bevel 112, the buffer structure 1 in the present application can generate a force in the opposite direction to the force applied to the battery cell 13 along the inclination direction of the first bevel 111 or the second bevel 112, and the force generated by the buffer structure 1 is proportional to the magnitude of the force applied to the battery cell 13, thereby fixing the battery cell 13 in the shell and improving the stability and reliability of the battery cell 13 in the shell.

[0037] According to the buffer structure 1 of the utility model, a first inclined surface 111 and a second inclined surface 112 are formed on the first buffer part 11. The first inclined surface 111 and the second inclined surface 112 are respectively inclined along the thickness direction of the first buffer part 11 in a direction away from each other. The second buffer part 12 is arranged on one side of the first buffer part 11 and is formed with a first matching surface 121 and a second matching surface 122. The first matching surface 121 is in contact with the first inclined surface 111, and the second inclined surface 112 is in contact with the second matching surface 122. The buffer structure 1 is arranged on the battery cell 13. When the battery cell 13 is subjected to a force from the same inclination direction as the first inclined surface 111 or the second inclined surface 112, the buffer structure 1 in the present application can generate a force in the opposite direction to the force applied to the battery cell 13 along the inclination direction of the first inclined surface 111 or the second inclined surface 112, and the force generated by the buffer structure 1 is proportional to the magnitude of the force applied to the battery cell 13, thereby fixing the battery cell 13 on the shell, thereby improving the stability and reliability of the battery cell 13 in the shell.

[0038] According to an embodiment of the utility model, the first inclined surface 111 and the second inclined surface 112 are inclined in opposite directions in the thickness direction of the first buffer 11. When the battery cell 13 is subjected to a force in the same direction as the first inclined surface 111 or the second inclined surface 112, the buffer structure 1 in the present application can generate a force in the opposite direction to the force applied to the battery cell 13 along the inclined direction of the first inclined surface 111 or the second inclined surface 112, and because the first inclined surface 111 and the second inclined surface 112 are inclined in opposite directions, the buffer structure 1 in the present application can generate forces in two different directions, thereby better fixing the battery cell 13 on the shell, and further improving the stability and reliability of the battery cell 13 in the shell.

[0039] According to one embodiment of the utility model, the first buffer member 11 is constructed as a polygon, and a plurality of corners are arranged in sequence on the outer periphery of the first buffer member 11, wherein two adjacent corners are constructed as the first corner and the second corner, or two corners arranged at intervals are constructed as the first corner and the second corner, and first inclined surfaces 111 are respectively formed on the plurality of first corners, and second inclined surfaces 112 are respectively formed on the plurality of second corners, and the inclination directions of the plurality of first inclined surfaces 111 and the plurality of second inclined surfaces 112 are opposite, so that the first buffer member 11 can generate forces in multiple different directions.

[0040] In some specific embodiments, the first buffer member 11 and the second buffer member 12 are both constructed as a square structure, and four corners are formed in sequence on the outer periphery of the square. The first corner and the second corner can be constructed as two respectively, and the two corners on the diagonal of the square are constructed as the first corner and the second corner respectively. The first inclined surface 111 and the second inclined surface 112 formed on the first corner and the second corner have opposite inclination directions, so that the buffer structure 1 can generate forces in four directions.

[0041] According to one embodiment of the utility model, a first bevel 111 is formed on both sides of the first corner in the thickness direction; a second bevel 112 is formed on both sides of the second corner in the thickness direction; wherein the second buffer member 12 is constructed into two and is respectively arranged on both sides of the first buffer member 11 in the thickness direction, and the surfaces of the two second buffer members 12 facing the first buffer member 11 are respectively formed with a first mating surface 121 and a second mating surface 122.

[0042] In some specific embodiments, a first angle and a second angle are formed on the first buffer member 11, and first inclined surfaces 111 are formed on both sides of the first angle in the thickness direction of the first buffer member 11, and second inclined surfaces 112 are formed on both sides of the second angle in the thickness direction of the first buffer member 11, respectively. The second buffer member 12 is constructed in two pieces, and the two second buffer members 12 are respectively attached to both sides of the thickness direction of the first buffer member 11, and first mating surfaces 121 and second mating surfaces 122 are respectively formed on the two second buffer members 12, and the two first mating surfaces 121 are respectively attached to the corresponding first inclined surfaces 111, and the two second mating surfaces 122 are respectively attached to the corresponding second mating surfaces 122, so that the buffer structure 1 is composed of the second buffer member 12, the first buffer member 11, and the second buffer member 12 which are attached in sequence, and the double-layer design of the second buffer member 12 increases the friction force generated by the second buffer member 12 after being subjected to force, and the direction of the friction force is opposite to the force direction of the second buffer member 12, thereby improving the stability and reliability of the battery cell 13 located in the shell.

[0043] According to an embodiment of the utility model, the first buffer member 11 can be constructed as an elastic member, and the elastic member can be constructed as silicone rubber, polyurethane, PI foam, MPP, melamine, etc. Since the first buffer member 11 is constructed as an elastic member, the elastic member has the performance of being deformed when subjected to force and being able to generate a force in the opposite direction of the force received. When the buffer structure 1 is arranged between multiple battery cells 13, the multiple battery cells 13 can be compressed a certain distance along the arrangement direction of the battery cells 13, thereby reducing the overall length of the multiple battery cells 13, so that the multiple battery cells 13 can be more conveniently placed in the shell. When the external force is removed and the elastic member returns to its original state, the original length between the multiple battery cells 13 is restored, thereby reducing the difficulty of disassembly and assembly of the battery cells 13 and improving the disassembly and assembly efficiency of the battery cells 13.

[0044] According to one embodiment of the utility model, the second buffer 12 can be constructed of a hard plastic material. The hard plastic material has the advantages of high strength, high hardness, excellent wear resistance and corrosion resistance. On the one hand, hard plastic has little wear during long-term use due to its own characteristics, and can be used for a long time to reduce manufacturing costs. In addition, the friction coefficient of hard plastic gradually increases with the increase of pressure. On the other hand, the hard plastic material can protect the first buffer 11, effectively preventing the first buffer 11 from being damaged by wear and consumption, extending the service life of the first buffer 11, and at the same time improving the stability and reliability of the first buffer 11 after long-term use.

[0045] In addition, the second buffer member 12 may also be made of materials such as PC, PBT, epoxy board, and PA.

[0046] The battery cell assembly 2 according to the present utility model is briefly described below.

[0047] The battery cell assembly 2 according to the utility model includes the buffer structure 1 described in any one of the above embodiments. Since the buffer structure 1 described in any one of the above embodiments is provided on the battery according to the utility model, the battery cell of the battery cell assembly 2 is easy to disassemble, and the maintenance of the battery cell is more convenient and quick, and the maintenance cost is low, so that the battery cell assembly 2 has a longer service life, good stability, strong reliability, and high safety.

[0048] In some specific embodiments, the battery cell assembly 2 is composed of a battery cell and a buffer structure 1, and the battery cell is constructed in multiples. A plurality of buffer structures 1 are arranged between two adjacent battery cells in the width direction of the battery cell assembly 2. The buffer structure 1 is assembled by applying thermosetting glue on the second buffer member 12, and then the side of the second buffer member 12 coated with thermosetting glue is in contact with at least part of the outer surface of the battery cell, thereby realizing the assembly of the battery cell and the buffer structure 1. An end plate 14 and a shell are also arranged in the battery cell assembly 2. The end plate 14 is arranged at the end of the battery cell. A plurality of buffer structures 1 are also arranged between the end plate 14 and the battery cell. When the battery cell assembly 2 is assembled, a tooling clamp is used. The end plate 14 is held, and pressure is applied toward the width direction of the battery cell assembly 2. Since the buffer structure 1 is provided with an elastic first buffer member 11, the first buffer member 11 can be deformed by force, so the pre-assembled battery cells can be compressed a certain distance along the width direction of the telecommunication assembly, so that the pre-assembled battery cells can be assembled into the shell more conveniently. After the external force is removed, the battery cells assembled into the shell are provided with pressure toward the width direction of the battery cell assembly 2 (i.e., the battery cell compression direction) due to the rebound force generated by the first buffer member 11 returning to its original state, thereby fixing the battery cells on the inner wall of the shell along the width direction of the battery cell assembly 2.

[0049] In addition, when the battery cell 13 is subjected to forces from other directions, since the outer surface of the buffer structure 1 is formed with multiple inclined surfaces extending in different directions, the friction force applied to the battery cell 13 in the opposite direction to the force applied to the battery cell 13 can be provided, and the friction force generated is proportional to the force applied to the battery cell 13, so that the battery cell 13 can be fixed to the inner wall of the shell in different directions, thereby achieving the fixation of the battery cell 13 and the assembly of the battery cell assembly 2. According to one embodiment of the utility model, the battery cell assembly 2 also includes a heat conductor 15, which is arranged at the bottom of the battery cell 13.

[0050] In some specific embodiments, the battery cell assembly 2 is also provided with a heat conductive member 15, which is provided between the battery cell 13 and the bottom plate of the shell. In the present application, the heat conductive member 15 is not sticky and no longer plays a role in fixing the battery cell 13. The heat conductive member 15 only has the function of quickly and effectively conducting the heat generated by the battery cell 13 to avoid overheating of a battery cell 13 in the battery cell assembly 2 and ensure the normal and safe operation of the battery cell 13. The heat conductive member 15 is in close contact with the battery cell 13, so that the heat generated by the battery cell 13 can be quickly conducted from the battery cell 13 to the heat conductive member 15. The heat conductive member 15 disperses the heat to the external environment to keep the temperature of the battery cell 13 within a reasonable range, thereby improving the safety and reliability of the battery cell assembly 2 during operation.

[0051] In addition, when the battery cell assembly 2 needs to be repaired, the end plate 14 can be clamped by a tool and compressed a certain distance along the arrangement direction of the battery cell 13. Since there is no structural bonding at the bottom of the battery cell 13, the battery cell 13 can be directly taken out of the shell to facilitate maintenance of the battery cell 13.

[0052] The battery according to the utility model is briefly described below.

[0053] The battery according to the utility model is provided with the battery cell assembly 2 described in any one of the above embodiments. Since the battery according to the utility model is provided with the battery cell assembly 2 described in any one of the above embodiments, the battery according to the present application has low difficulty in disassembling the battery cell, and the repair and maintenance is more convenient and quick, and the repair cost is low, so that the battery has a long service life, good stability, strong reliability and high safety.

[0054] The power equipment according to the utility model is briefly described below.

[0055] The power equipment according to the utility model is provided with a battery as described in any one of the above embodiments. Since the power equipment according to the utility model is provided with a battery as described in any one of the above embodiments, the power equipment according to the present application has a long service life, good safety and high reliability.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0057] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0058] In the description of the present invention, "plurality" means two or more.

[0059] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0060] In the description of the present invention, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. In the description of this specification, descriptions with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention.

[0061] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A buffer structure for a battery cell, characterized in that: include: A first buffer member, wherein a first corner and a second corner are formed on the first buffer member, a first inclined surface is formed on the first corner, a second inclined surface is formed on the second corner, and the first inclined surface and the second inclined surface are respectively arranged in a direction away from each other along a thickness direction of the first buffer member; The second buffer is arranged on one side of the first buffer and is formed with a first matching surface and a second matching surface, the first matching surface is in contact with the first inclined surface, and the second matching surface is in contact with the second inclined surface.

2. The buffer structure for a battery cell according to claim 1, characterized in that: The first inclined surface and the second inclined surface have opposite inclination directions in the thickness direction of the first buffer member.

3. The buffer structure for a battery cell according to claim 2, characterized in that: The first buffer is configured as a polygon, and a plurality of corners are sequentially arranged on the outer circumference of the first buffer, wherein two adjacent corners are configured as the first corner and the second corner; or two corners disposed at intervals are configured as the first corner and the second corner.

4. The buffer structure for a battery cell according to claim 3, characterized in that: The first inclined surfaces are respectively formed on both sides of the first corner in the thickness direction; The second angle is formed with the second inclined surface on both sides in the thickness direction; wherein The second buffer components are structured in two pieces and are respectively arranged on two sides of the first buffer component in the thickness direction. The first matching surface and the second matching surface are respectively formed on the surfaces of the two second buffer components facing the first buffer component.

5. The buffer structure for a battery cell according to claim 1, characterized in that: The first buffer member is configured as an elastic member.

6. The buffer structure for a battery cell according to claim 1, characterized in that: The second buffer component is made of hard plastic material.

7. A battery cell assembly, characterized in that: include: Battery cells; A buffer structure, wherein the buffer structure is constructed as the buffer structure described in any one of claims 1 to 6, and the second buffer member is attached to the battery cell.

8. The battery cell assembly according to claim 7, characterized in that: Also includes: A heat conducting member is arranged at the bottom of the battery core.

9. A battery, characterized in that: A battery core assembly comprising any one of claims 7 to 8.

10. A power device, characterized in that: A battery comprising the battery of claim 9.

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