Buffer assembly, battery box body, battery and power utilization device

Abstract

The utility model provides a buffer assembly, a battery box body, a battery and an electric device. The buffer assembly is applied to the battery, and comprises a bearing mechanism which comprises a first supporting part and a second supporting part which are oppositely arranged along a first direction; the elastic part is arranged between the first supporting part and the second supporting part, and the elastic part is arranged in an elastic deformation mode in the first direction so that the distance between the first supporting part and the second supporting part in the first direction can be adjusted.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During actual use of the battery, the battery cells may be easily squeezed and damaged due to external force or expansion of the battery cells, which reduces the reliability of the battery and urgently needs improvement. Utility Model Content

[0004] In view of the above problems, the present application provides a buffer assembly, a battery case, a battery and an electrical device, which can improve the problem of battery reliability being reduced due to squeezing and damage of battery cells caused by external force or expansion of battery cells.

[0005] In a first aspect, the present application provides a buffer assembly for use with a battery, comprising: a supporting mechanism, comprising a first supporting component and a second supporting component arranged relative to each other along a first direction; an elastic member, arranged between the first supporting component and the second supporting component, the elastic member being elastically deformable in the first direction so that the spacing between the first supporting component and the second supporting component in the first direction is adjustable.

[0006] In the technical solution of the embodiment of the present application, a buffer assembly is applied to a battery, and the buffer assembly includes a bearing mechanism and a leaf spring, the bearing mechanism includes a first supporting component and a second supporting component that are relatively arranged, at least one of the first supporting component and the second supporting component is used to contact the battery cell, and the bearing mechanism arranged in the battery plays a role of limiting and supporting the battery cell, the elastic member is arranged between the first supporting component and the second supporting component, and the elastic member is elastically deformable in a first direction, so that when an external force impact causes the battery cell to shift, and the battery cell expands, etc., causing the battery cell to squeeze the first supporting component and / or the second supporting component, the buffer assembly can absorb energy through the deformation of the elastic member, thereby reducing the squeezing force between the bearing mechanism and the battery cell, and improving the reliability of the battery.

[0007] In some embodiments, the elastic member is a leaf spring.

[0008] In the technical solution of the embodiment of the present application, a leaf spring is used as an elastic member between the first support component and the second support component. The extended dimension of the leaf spring is larger than that of the spring. The same number of leaf springs can provide a larger elastic force range than that of the spring. Therefore, a leaf spring is arranged between the first support component and the second support component. The leaf spring provides sufficient elastic force for the first support component and the second support component, while reducing the number of elastic members, simplifying the assembly process of the buffer assembly, reducing the cost of the buffer assembly, reducing the weight of the buffer assembly, and improving the energy density of the battery.

[0009] In some embodiments, the buffer assembly also includes a force equalizing mechanism, which includes a first force equalizing component and / or a second force equalizing component. The first force equalizing component and the second force equalizing component are both extended along at least one of the second direction and the third direction, and the second direction intersects with the third direction. The first force equalizing component is arranged between the elastic member and the first support member, and the elastic member is connected to the first support member through the first force equalizing component. The second force equalizing component is connected between the elastic member and the second support member, and the elastic member is connected to the second support member through the second force equalizing component.

[0010] In the technical solution of the embodiment of the present application, the buffer assembly also includes a force equalizing mechanism, which includes a first force equalizing component and / or a second force equalizing component, and the first force equalizing component and the second force equalizing component are both extended along at least one of the second direction and the third direction. The elastic member is connected to the first support component through the first force equalizing component to increase the contact area between the elastic member and the first support component through the first force equalizing component, and reduce the risk of the elastic member piercing through the first support component due to excessive pressure between the elastic member and the first support component; the elastic member is connected to the second support component through the second force equalizing component to increase the contact area between the elastic member and the second support component through the second force equalizing component, and reduce the risk of the elastic member piercing through the second support component due to excessive pressure between the elastic member and the second support component, thereby improving the reliability of the buffer assembly.

[0011] In some embodiments, the elastic member includes two first connecting parts arranged opposite to each other in its extension direction, the first force equalizing member includes a first segment, the two first segments are arranged between the first connecting part and the first supporting member, and the orthographic projection of the first connecting part in the first direction is within the first segment.

[0012] In the technical solution of the embodiment of the present application, the elastic member includes two first connecting parts arranged opposite to each other, the first force equalizing member includes a first segment, the two first segments are arranged between the first connecting part and the first supporting part, and the positive projection of the first connecting part in the first direction is within the first segment to disperse the pressure of the elastic member at the first connecting part on the first supporting part to reduce the risk of the first connecting part piercing through the first supporting part.

[0013] In some embodiments, the first force equalizing member further includes a second segment, the first segment extends along the second direction, the second segment extends along the third direction, and the second segment is connected between the two first segments.

[0014] In the technical solution of the embodiment of the present application, the first force equalizing component also includes a second segment, the first segment extends along the second direction, the second segment extends along the third direction, and the second segment is connected between the two first segments. The contact area between the first force equalizing component and the first support component is increased by connecting the first segment and the second segment to each other, so that the elastic force of the elastic member acting on the first support component is distributed through the first force equalizing component, so that the elastic member provides uniform elastic force to various parts of the first support component.

[0015] In some embodiments, the second segment is connected to the middle of the two first segments in the second direction.

[0016] In the technical solution of the embodiment of the present application, the second segment is connected to the middle parts of the two first segments in the second direction, so that the elastic member provides a more uniform elastic force for the first supporting component.

[0017] In some embodiments, the elastic member includes a second connecting portion connected to the second supporting member, the second force equalizing member includes a third segment, the third segment is arranged between the second connecting portion and the second supporting member, and the orthographic projection of the second connecting portion in the first direction is within the third segment.

[0018] In the technical solution of the embodiment of the present application, the elastic member includes a second connecting portion connected to the second supporting member, the second force equalizing member includes a third segment, the third segment is arranged between the second connecting portion and the second supporting member, and the positive projection of the second connecting portion in the first direction is within the third segment to disperse the pressure of the elastic member on the second supporting member at the second connecting portion to reduce the risk of the second connecting portion piercing through the second supporting member.

[0019] In some embodiments, the second force equalizing member further includes a fourth segment, the third segment extends along the second direction, the fourth segment extends along the third direction, and two fourth segments are disposed at both ends of the third segment.

[0020] In the technical solution of the embodiment of the present application, the second force equalizing component also includes a fourth segment, the third segment extends along the second direction, the fourth segment extends along the third direction, and the two fourth segments are respectively arranged at both ends of the third segment. The third segment and the fourth segment are connected to each other to increase the contact area between the second force equalizing component and the second support component, so that the elastic force of the elastic member acting on the second support component can be distributed through the second force equalizing component, so that the elastic member can provide uniform elastic force to various parts of the second support component.

[0021] In some embodiments, the third segment is connected to the middle of the fourth segment in the third direction.

[0022] In the technical solution of the embodiment of the present application, the third segment is connected to the middle part of the fourth segment in the third direction, so that the elastic member provides a more uniform elastic force for the second supporting component.

[0023] In some embodiments, the first force equalizing member includes a first segment, and the first segment and the third segment extend in the same direction.

[0024] In the technical solution of the embodiment of the present application, the first segment and the third segment have the same extension direction, so that in one buffer component, the structures of the first force equalizing component and the second force equalizing component are the same, the first segment and the third segment can be universal, reducing the number of molds for the force equalizing structure and reducing the cost of the buffer component.

[0025] In a second aspect, the present application further provides a battery box, comprising a box body and a buffer assembly according to any one of the above-mentioned first aspect embodiments, wherein the buffer assembly is disposed in the box body.

[0026] In a third aspect, the present application further provides a battery, comprising a battery cell and a battery case according to the above-mentioned second aspect embodiment, wherein the battery cell is arranged on at least one side of the buffer assembly in a first direction.

[0027] In a fourth aspect, the present application further provides an electrical device, comprising the battery of the above-mentioned third aspect embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of the structure of a battery pack provided in one embodiment of the present application;

[0031] Figure 3 is a structural schematic diagram of a battery module provided by an embodiment of the present application;

[0032] Figure 4 is an exploded view of a buffer component provided by an embodiment of the present application;

[0033] Figure 5 is an exploded view of a buffer component provided by an embodiment of the present application;

[0034] Figure 6It is a structural schematic diagram of an elastic member of a buffer assembly provided in one embodiment of the present application;

[0035] Figure 7 It is a structural schematic diagram of a first force equalizing component of a buffer assembly provided in one embodiment of the present application;

[0036] Figure 8 It is a schematic structural diagram of a second force equalizing component of a buffer assembly provided in one embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Vehicle; 11. Controller; 12. Motor;

[0039] 2. Battery; 21. Battery module; 22. Box; 221. First box portion; 222. Second box portion; 3. Battery cell;

[0040] 4. Buffer component;

[0041] 41. Carrying mechanism; 411. First supporting member; 412. Second supporting member;

[0042] 42, elastic member; 421, first connecting portion; 422, second connecting portion;

[0043] 43. Force balancing mechanism; 431. First force balancing component; 4311. First segment; 4312. Second segment; 432. Second force balancing component; 4321. Third segment; 4322. Fourth segment. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0046] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the 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 on the embodiments of the present application.

[0047] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0051] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0052] When the battery is subjected to external forces or the battery cells in the battery expand during charging, the battery cells will be squeezed and collided with each other, causing damage to the battery cells and reducing the reliability of the battery.

[0053] Based on the above problems, an embodiment of the present application provides a buffer assembly applied to a battery, the buffer assembly includes a bearing mechanism and a leaf spring, the bearing mechanism includes a first supporting member and a second supporting member relatively arranged, at least one of the first supporting member and the second supporting member is used to contact the battery cell, the bearing mechanism arranged in the battery plays a role of limiting and supporting the battery cell, the elastic member is arranged between the first supporting member and the second supporting member, and the elastic member is elastically deformable in a first direction, so that when an external force impact causes the battery cell to shift, and the battery cell expands, etc., causing the battery cell to squeeze the first supporting member and / or the second supporting member, the buffer assembly can absorb energy through the deformation of the elastic member, thereby reducing the squeezing force between the bearing mechanism and the battery cell, and improving the reliability of the battery.

[0054] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0055] The electrical device may be a vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0056] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including a box and electrical equipment using the battery. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.

[0057] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1 provided for some embodiments of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, head or tail of the vehicle 1. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 11 and a motor 12, and the controller 11 is used to control the battery 2 to power the motor 12, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0058] In some embodiments of the present application, the battery 2 can be used not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0059] In order to meet different power requirements, the battery 2 may include a plurality of battery cells, and a battery cell refers to the smallest unit that constitutes a battery module or a battery pack. A plurality of battery cells can be connected in series and / or in parallel via electrode terminals for use in various applications. The battery mentioned in the present application includes a battery module or a battery pack. Among them, a plurality of battery cells can be connected in series, in parallel, or in mixed connection, and mixed connection refers to a mixture of series and parallel connection. In the embodiment of the present application, a plurality of battery cells can directly constitute a battery pack, or they can first constitute a battery module 21, and the battery module 21 can then constitute a battery pack.

[0060] Figure 2 A schematic structural diagram of a battery 2 according to an embodiment of the present application is shown.

[0061] like Figure 2 As shown, the battery includes a box body 22 and a battery cell (not shown), and the battery cell is accommodated in the box body 22.

[0062] The box 22 can be a simple three-dimensional structure such as a single cuboid, a cylinder, or a sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres, which is not limited in the present embodiment. The box 22 can be made of alloy materials such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber plus epoxy resin, which is not limited in the present embodiment.

[0063] The box 22 is used to accommodate the battery cells, and the box 22 can be a variety of structures. In some embodiments, the box 22 can include a first box portion 221 and a second box portion 222, the first box portion 221 and the second box portion 222 cover each other, and the first box portion 221 and the second box portion 222 jointly define a storage space for accommodating the battery cells. The second box portion 222 can be a hollow structure with one end open, the first box portion 221 is a plate-like structure, and the first box portion 221 covers the open side of the second box portion 222 to form a box 22 with a storage space; the first box portion 221 and the second box portion 222 can also be a hollow structure with one side open, and the open side of the first box portion 221 covers the open side of the second box portion 222 to form a box 22 with a storage space. Of course, the first box portion 221 and the second box portion 222 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0064] In order to improve the sealing performance after the first box body 221 and the second box body 222 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body 221 and the second box body 222 .

[0065] Assuming that the first box portion 221 covers the top of the second box portion 222 , the first box portion 221 can also be referred to as an upper box, and the second box portion 222 can also be referred to as a lower box.

[0066] In the battery 2, there can be one or more battery cells. If there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells are connected in series and in parallel. The multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells can be accommodated in the box 22; of course, multiple battery cells can also be connected in series, in parallel, or in mixed connection to form a battery module 21, and the multiple battery modules 21 can be connected in series, in parallel, or in mixed connection to form a whole, and then accommodated in the box 22.

[0067] Figure 3 A schematic structural diagram of a battery module 21 according to an embodiment of the present application is shown.

[0068] In some embodiments, Figure 3 As shown, there are multiple battery cells 3, which are first connected in series, in parallel or in series to form a battery module 21. Multiple battery modules 21 are then connected in series, in parallel or in series to form a whole, and are contained in a box (not shown in the figure).

[0069] The multiple battery cells 3 in the battery module 21 can be electrically connected through a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 3 in the battery module 21 .

[0070] In the present application, the battery cell 3 may include a lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell 3 may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. The battery cell 3 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this. However, for the sake of simplicity, the following embodiments are all described using square battery cells as examples.

[0071] See also Figure 4 , Figure 4 It is a schematic diagram of the structure of a vehicle provided in one embodiment of the present application.

[0072] First, as Figure 4 As shown, the present application provides a buffer assembly 4 applied to a battery, the buffer assembly 4 includes a bearing mechanism 41 and an elastic member 42, the bearing mechanism 41 includes a first support component 411 and a second support component 412 arranged relatively along a first direction X; the elastic member 42 is arranged between the first support component 411 and the second support component 412, the elastic member 42 is elastically deformable in the first direction X, so that the spacing between the first support component 411 and the second support component 412 in the first direction X is adjustable, and the elastic member 42 is a leaf spring.

[0073] In the technical solution of the embodiment of the present application, the buffer component 4 is applied to the battery, and the buffer component 4 includes a bearing mechanism 41 and a leaf spring. The bearing mechanism 41 includes a first support component 411 and a second support component 412 that are relatively arranged. At least one of the first support component 411 and the second support component 412 is used to contact the battery cell. The bearing mechanism 41 arranged in the battery plays a role of limiting and supporting the battery cell. The elastic member 42 is arranged between the first support component 411 and the second support component 412, and the elastic member 42 is elastically deformable in the first direction X, so that when the battery cell is displaced due to external force impact, and the battery cell expands, etc., causing the battery cell to squeeze the first support component 411 and / or the second support component 412, the buffer component 4 can absorb energy through the deformation of the elastic member 42, reduce the squeezing force between the bearing mechanism 41 and the battery cell, and improve the reliability of the battery.

[0074] Optionally, the supporting structure 41 is made of insulating material to improve the insulation reliability between adjacent battery cells.

[0075] Optionally, the elastic member may be at least one of a spring, a leaf spring, a spring sheet or an elastic block.

[0076] Optionally, a plurality of springs are arranged in rows and columns between the first supporting component 411 and the second supporting component 412 .

[0077] In some embodiments, Figure 4 As shown, the elastic member 42 is a leaf spring.

[0078] In these embodiments, a leaf spring is used as the elastic member 42 between the first support component 411 and the second support component 412. The extended dimension of the leaf spring is larger than that of the spring. The same number of leaf springs can provide a larger elastic force range than that of the spring. Therefore, a leaf spring is arranged between the first support component 411 and the second support component 412. The leaf spring provides sufficient elastic force for the first support component 411 and the second support component 412, while reducing the number of elastic members 42, simplifying the assembly process of the buffer component 4, reducing the cost of the buffer component 4, reducing the weight of the buffer component 4, and improving the energy density of the battery.

[0079] The buffer assembly 4 includes a bearing mechanism 41 and an elastic member 42. The bearing mechanism 41 is used to contact the battery cell. The bearing mechanism 41 supports and limits the battery cell. The shape of the bearing mechanism 41 can be flexibly designed. For the convenience of description, the bearing mechanism 41 is taken as an example in which it is rectangular. The elastic member 42 is a leaf spring arranged between the first support component 411 and the second support component 412. When the battery cell squeezes the first support component 411 and / or the second support component 412, the distance between the first support component 411 and the second support component 412 is reduced, and the leaf spring deforms to absorb energy to absorb the squeezing force of the battery cell, so as to increase the life of the battery cell.

[0080] Optionally, a plurality of leaf springs are disposed between the first supporting component 411 and the second supporting component 412 , so that the leaf springs provide uniform elastic force to various locations of the bearing mechanism 41 .

[0081] In the embodiment of the present application, a leaf spring is used as the elastic member 42, and the extension area of ​​the leaf spring is larger than the setting area of ​​the spring. Therefore, one leaf spring can replace several springs. Therefore, when a leaf spring is set between the first support component 411 and the second support component 412, a smaller number of elastic members 42 can be set between the first support component 411 and the second support component 412 to simplify the assembly process of the buffer component 4.

[0082] Optionally, the elastic member 42 between the first supporting member 411 and the second supporting member 412 may include both a leaf spring and a spring, and the leaf spring may be supplemented by the spring so that the elastic member 42 provides uniform elastic force to all parts of the first supporting member 411 and the second supporting member 412 .

[0083] Optionally, in the battery box, the extension direction of the leaf spring is the same as the arrangement direction of the battery cells, so that a single leaf spring can provide elastic force for multiple battery cells, reducing the number of elastic members 42. Exemplarily, the first support member 411 and the second support member 412 are rectangular, the arrangement direction of the battery cells is the length direction of the first support member 411, and the extension direction of the leaf spring is also the length direction of the first support member 411.

[0084] See also Figure 5 , Figure 5 It is an exploded view of a buffer component provided in one embodiment of the present application.

[0085] In some embodiments, Figure 5 As shown, the buffer assembly 4 also includes a force equalizing mechanism 43, which includes a first force equalizing component 431 and / or a second force equalizing component 432. The first force equalizing component 431 and the second force equalizing component 432 are both extended along at least one of the second direction Y and the third direction Z. The second direction Y and the third direction Z intersect. The first force equalizing component 431 is arranged between the elastic member 42 and the first support member 411. The elastic member 42 is connected to the first support member 411 through the first force equalizing component 431. The second force equalizing component 432 is connected between the elastic member 42 and the second support member 412. The elastic member 42 is connected to the second support member 412 through the second force equalizing component 432.

[0086] In these embodiments, the buffer assembly 4 also includes a force equalizing mechanism 43, which includes a first force equalizing component 431 and / or a second force equalizing component 432. The first force equalizing component 431 and the second force equalizing component 432 are both extended along at least one of the second direction Y and the third direction Z. The elastic member 42 is connected to the first support component 411 through the first force equalizing component 431 to increase the contact area between the elastic member 42 and the first support component 411 through the first force equalizing component 431, thereby reducing the risk of the elastic member 42 piercing through the first support component 411 due to excessive pressure between the elastic member 42 and the first support component 411; the elastic member 42 is connected to the second support component 412 through the second force equalizing component 432 to increase the contact area between the elastic member 42 and the second support component 412 through the second force equalizing component 432, thereby reducing the risk of the elastic member 42 piercing through the second support component 412 due to excessive pressure between the elastic member 42 and the second support component 412, thereby improving the reliability of the buffer assembly 4.

[0087] A force equalizing mechanism 43 is arranged between the elastic member 42 and the bearing mechanism 41, and the force equalizing mechanism 43 includes a first force equalizing member 431 and / or a second force equalizing member 432. Specifically, in a buffer assembly 4, the elastic member 42 contacts the first support member 411 through the first force equalizing member 431, and the elastic member 42 contacts the second support member 412 directly; the elastic member 42 contacts the first support member 411 directly, and the elastic member 42 contacts the second support member 412 through the second force equalizing member 432; the elastic member 42 contacts the first support member 411 through the first force equalizing member 431, and the elastic member 42 contacts the second support member 412 through the second force equalizing member 432.

[0088] The properties of the first force equalizing member 431 can be flexibly designed, for example, the first force equalizing member 431 is rectangular, circular, or polygonal, etc. The second force equalizing member 432 is similar.

[0089] Optionally, the first force equalizing member 431 is connected to one of the first supporting member 411 or the elastic member 42 to reduce the risk of displacement of the first force equalizing member 431 during use of the buffer assembly 4. The first force equalizing member 431 can be connected to the first supporting member 411 and the elastic member 42 by welding or riveting. The second force equalizing member 432 is similar.

[0090] Optionally, the first force equalizing member 431 is made of metal to increase the service life of the first force equalizing member 431. The second force equalizing member 432 is similar.

[0091] See also Figure 6 and Figure 7 , Figure 6 It is a structural schematic diagram of an elastic member of a buffer assembly provided in one embodiment of the present application; Figure 7 It is a schematic structural diagram of a first force equalizing component of a buffer assembly provided in one embodiment of the present application.

[0092] In some embodiments, Figures 5 to 7 As shown, the elastic member 42 includes two first connecting parts 421 arranged opposite to each other in its extension direction, the first force equalizing member 431 includes a first segment 4311, the two first segments 4311 are arranged between the first connecting part 421 and the first supporting member 411, and the orthographic projection of the first connecting part 421 in the first direction X is within the first segment 4311.

[0093] In these embodiments, the elastic member 42 includes two first connecting portions 421 arranged opposite to each other, the first force equalizing member 431 includes a first segment 4311, the two first segments 4311 are arranged between the first connecting portion 421 and the first supporting member 411, and the orthographic projection of the first connecting portion 421 in the first direction X is within the first segment 4311 to disperse the pressure of the elastic member 42 on the first supporting member 411 at the first connecting portion 421 to reduce the risk of the first connecting portion 421 piercing through the first supporting member 411.

[0094] The elastic member 42 includes two first connecting parts 421 arranged opposite to each other. The elastic member 42 contacts the first supporting component 411 through the first connecting parts 421. Therefore, the first segment 4311 is arranged between the first connecting part 421 and the first supporting component 411. The first segment 4311 can more fully disperse the pressure of the elastic member 42 on the first supporting component 411.

[0095] The two first segments 4311 have the same structure, size and material, and the two first segments 4311 connected to the same elastic member 42 extend in the same or different directions. Exemplarily, the two first segments 4311 extend along the third direction Z; or one first segment 4311 extends along the third direction Z, and the other first segment 4311 extends along the second direction Y; or the two first segments 4311 extend along the second direction Y and the third direction Z, and the first segments 4311 are in a "cross" shape.

[0096] Optionally, the first segment 4311 extends to the edge of the first supporting component 411 , so that the elastic member 42 can provide uniform elastic force to the first supporting component 411 through the first segment 4311 .

[0097] Optionally, the two first segments 4311 extend toward each other and contact each other, increasing the area of ​​the first segment 4311 so that the elastic member 42 can provide uniform elastic force to the first supporting component 411 through the first segment 4311 .

[0098] In some embodiments, Figures 5 to 7 As shown, the first force equalizing member 431 further includes a second segment 4312 , the first segment 4311 extends along the second direction Y, the second segment 4312 extends along the third direction Z, and the second segment 4312 is connected between the two first segments 4311 .

[0099] In these embodiments, the first force equalizing component 431 also includes a second segment 4312, the first segment 4311 extends along the second direction Y, the second segment 4312 extends along the third direction Z, and the second segment 4312 is connected between the two first segments 4311. The contact area between the first force equalizing component 431 and the first support component 411 is increased by the interconnected first segment 4311 and the second segment 4312, so that the elastic force of the elastic member 42 acting on the first support component 411 is dispersed through the first force equalizing component 431, so that the elastic member 42 provides uniform elastic force to various parts of the first support component 411.

[0100] Optionally, the second segment 4312 extends from the first segment 4311 to the edge of the first supporting member 411 , so as to disperse the elastic force of the elastic member 42 to various locations of the first supporting member 411 through the first force equalizing member 431 , thereby improving the force uniformity of the first supporting member 411 .

[0101] Optionally, the first segment 4311 and the second segment 4312 are manufactured as one piece, or the first segment 4311 and the second segment 4312 are welded together to improve the structural strength of the first force equalizing member 431 .

[0102] In some embodiments, Figures 5 to 7 As shown, the second segment 4312 is connected to the middle parts of the two first segments 4311 in the second direction Y.

[0103] In these embodiments, the second segment 4312 is connected to the middle portions of the two first segments 4311 in the second direction Y, so that the elastic member 42 provides a more uniform elastic force for the first supporting member 411 .

[0104] Optionally, the first segment 4311 and the second segment 4312 are arranged perpendicular to each other, that is, the extension direction of the first segment 4311 is one of the length direction or the width direction of the rectangular first support component 411, and the extension direction of the second segment 4312 is the other of the length direction or the width direction of the rectangular first support component 411, so that the elastic force of the elastic member 42 can be evenly diffused throughout the first support component 411 through the first segment 4311 and the second segment 4312.

[0105] See also Figure 8 , Figure 8 It is a schematic structural diagram of a second force equalizing component of a buffer assembly provided in one embodiment of the present application.

[0106] In some embodiments, Figure 5 , Figure 6 and Figure 8As shown, the elastic member 42 includes a second connecting portion 422 connected to the second supporting member 412, and the second force equalizing member 432 includes a third segment 4321, which is arranged between the second connecting portion 422 and the second supporting member 412, and the positive projection of the second connecting portion 422 in the first direction X is within the third segment 4321.

[0107] In these embodiments, the elastic member 42 includes a second connecting portion 422 connected to the second supporting member 412, the second force equalizing member 432 includes a third segment 4321, the third segment 4321 is arranged between the second connecting portion 422 and the second supporting member 412, and the positive projection of the second connecting portion 422 in the first direction X is within the third segment 4321 to disperse the pressure of the elastic member 42 on the second supporting member 412 in the second connecting portion 422 to reduce the risk of the second connecting portion 422 piercing through the second supporting member 412.

[0108] The elastic member 42 includes a second connecting portion 422. In the extension direction of the elastic member 42, the second connecting portion 422 is located between the two first connecting portions 421. The elastic member 42 contacts the second supporting component 412 through the second connecting portion 422. Therefore, the third segment 4321 is arranged between the second connecting portion 422 and the second supporting component 412. The third segment 4321 can more fully disperse the pressure exerted by the elastic member 42 on the second supporting component 412.

[0109] Exemplarily, the third segment 4321 extends along the third direction Z; or the third segment 4321 extends along the second direction Y; or the third segment 4321 extends along both the second direction Y and the third direction Z, and the third segment 4321 is in a "cross" shape.

[0110] Optionally, the third segment 4321 extends to the edge of the second supporting component 412 , so that the elastic member 42 can provide uniform elastic force to the second supporting component 412 through the third segment 4321 .

[0111] Optionally, the second supporting member 412 , the third segment 4321 and the second connecting portion 422 of the elastic member 42 are fixedly connected to reduce the risk of misalignment of the elastic member 42 during operation of the buffer assembly 4 .

[0112] In some embodiments, Figures 5 to 8 As shown, the second force equalizing member 432 further includes a fourth segment 4322 , the third segment 4321 extends along the second direction Y, the fourth segment 4322 extends along the third direction Z, and two fourth segments 4322 are disposed at both ends of the third segment 4321 .

[0113] In these embodiments, the second force equalizing member 432 further includes a fourth segment 4322. The third segment 4321 extends along the second direction Y, and the fourth segment 4322 extends along the third direction Z. The two fourth segments 4322 are respectively disposed at both ends of the third segment 4321. Through the interconnected third segment 4321 and fourth segment 4322, the contact area between the second force equalizing member 432 and the second support member 412 is increased, so that the elastic force of the elastic member 42 acting on the second support member 412 is dispersed by the second force equalizing member 432, so that the elastic member 42 provides a uniform elastic force for various parts of the second support member 412.

[0114] Optionally, at least one end of the third segment 4321 extends to the edge of the second support member 412, and at least one fourth segment 4322 is disposed at the edge position of the second support member 412, so as to expand the coverage of the second force equalizing member 432, so that the elastic force of the elastic member 42 is evenly diffused to various parts of the second support member 412 through the second force equalizing member 432.

[0115] Optionally, the fourth segment 4322 extends to both ends of the second support member 412 in the third direction Z, and the size of the fourth segment 4322 is increased to expand the coverage of the second force equalizing member 432.

[0116] Optionally, the third segment 4321 and the fourth segment 4322 are integrally formed, or the third segment 4321 and the fourth segment 4322 are welded together to improve the structural strength of the second force equalizing member 432.

[0117] In some embodiments, the buffer assembly 4 includes a bearing mechanism 41, an elastic member 42, and a force equalizing mechanism 43. The force equalizing mechanism 43 includes a first force equalizing member 431 and a second force equalizing member 432. The first force equalizing member 431 includes two first segments 4311 disposed between the first connecting portion 421 and the first support member 411 and extending along the third direction Z, and a second segment 4312 connected between the two first segments 4311 and extending along the second direction Y. The second force equalizing member 432 includes a third segment 4321 disposed between the second connecting portion 422 and the second support member 412 and extending along the third direction Z, and fourth segments 4322 connected to both ends of the third segment 4321 and extending along the second direction Y. The orthographic projection of the force equalizing mechanism 43 in the first direction X is in the shape of a Chinese character '田' (field). The elastic force of the elastic member 42 is evenly dispersed to each edge of the bearing mechanism 41 through the first segment 4311, the second segment 4312, the third segment, and the fourth segment 4322, so as to improve the buffering effect of the buffer assembly 4.

[0118] In some embodiments, such as Figure 5 、 Figure 6 and Figure 8As shown, the third segment 4321 is connected to the middle of the fourth segment 4322 in the third direction Z.

[0119] In these embodiments, the third segment 4321 is connected to the middle portion of the fourth segment 4322 in the third direction Z, so that the elastic member 42 provides a more uniform elastic force for the second supporting component 412 .

[0120] Optionally, the third segment 4321 and the fourth segment 4322 are arranged perpendicular to each other, that is, the extension direction of the third segment 4321 is one of the length direction or the width direction of the rectangular second support component 412, and the extension direction of the fourth segment 4322 is the other of the length direction or the width direction of the rectangular second support component 412, so that the elastic force of the elastic member 42 can be evenly diffused throughout the second support component 412 through the third segment 4321 and the fourth segment 4322.

[0121] In some embodiments, Figures 5 to 8 As shown, the first force equalizing member 431 includes a first segment 4311 , and the first segment 4311 and the third segment 4321 extend in the same direction.

[0122] In these embodiments, the first segment 4311 and the third segment 4321 extend in the same direction, so that in one buffer component 4, the first force equalizing component 431 and the second force equalizing component 432 have the same structure, and the first segment 4311 and the third segment 4321 can be used interchangeably, thereby reducing the number of molds for the force equalizing structure and reducing the cost of the buffer component 4.

[0123] Exemplarily, the first segment 4311 and the third segment 4321 both extend along the third direction Z, and have the same size and shape, so that during the assembly of the buffer component 4, the first segment 4311 and the third segment 4321 can be used interchangeably, reducing preparation costs and processing difficulty.

[0124] In a second aspect, the present application further provides a battery box, comprising a box body and a buffer assembly according to any one of the above-mentioned first aspect embodiments, wherein the buffer assembly is disposed in the box body.

[0125] In a third aspect, the present application further provides a battery, comprising a battery cell and a battery case according to the above-mentioned second aspect embodiment, wherein the battery cell is arranged on at least one side of the buffer assembly in the first direction X.

[0126] In a fourth aspect, the present application further provides an electrical device, comprising the battery of the above-mentioned third aspect embodiment.

[0127] In some embodiments, Figures 1 to 8As shown, the present application provides a buffer assembly 4 for a battery, the buffer assembly 4 includes a bearing mechanism 41, an elastic member 42 and a force equalizing mechanism 43, the bearing mechanism 41 includes a first supporting member 411 and a second supporting member 412 arranged opposite to each other along a first direction X; the elastic member 42 is arranged between the first supporting member 411 and the second supporting member 412, the elastic member 42 is elastically deformable in the first direction X, so that the spacing between the first supporting member 411 and the second supporting member 412 in the first direction X is adjustable, the elastic member 42 is a leaf spring, the elastic member 42 includes two first connecting portions 421 arranged opposite to each other in the extension direction thereof, and the elastic member 42 also includes a second connecting portion 422 connected to the second supporting member 412;

[0128] The force balancing mechanism 43 includes a first force balancing component 431 and a second force balancing component 432. The first force balancing component 431 includes a first segment 4311 and a second segment 4312. The second force balancing component 432 includes a third segment 4321 and a fourth segment 4322. The two first segments 4311 are respectively arranged between the first connecting portion 421 and the first supporting component 411. The orthographic projection of the first connecting portion 421 in the first direction X is within the first segment 4311. The first segment 4311 extends along the second direction Y, and the second segment 4312 extends along the third direction Z. The second segment 4312 is connected between the two first segments 4311, and the second segment 4312 is connected to the middle of the two first segments 4311 in the second direction Y.

[0129] The third segment 4321 is arranged between the second connecting portion 422 and the second supporting member 412, and the orthographic projection of the second connecting portion 422 in the first direction X is within the third segment 4321. The third segment 4321 extends along the second direction Y, and the fourth segment 4322 extends along the third direction Z. Two fourth segments 4322 are arranged at both ends of the third segment 4321, and the third segment 4321 is connected to the middle part of the fourth segment 4322 in the third direction Z.

[0130] In these embodiments, the buffer assembly 4 is applied to the battery, and the buffer assembly 4 includes a bearing mechanism 41 and a leaf spring. The bearing mechanism 41 includes a first supporting component 411 and a second supporting component 412 that are relatively arranged. At least one of the first supporting component 411 and the second supporting component 412 is used to contact the battery cell. The bearing mechanism 41 arranged in the battery plays a role of limiting and supporting the battery cell. The elastic member 42 is arranged between the first supporting component 411 and the second supporting component 412, and the elastic member 42 is elastically deformable in the first direction X, so that when the external force impact causes the battery cell to shift, and the battery cell expands, etc., the battery cell squeezes the first supporting component 411 and / or the second supporting component 412. When the elastic member 42 is deformed, the buffer component 4 can absorb energy through the deformation of the elastic member 42, reduce the squeezing force between the bearing mechanism 41 and the battery cell, and improve the reliability of the battery; and a leaf spring is used as the elastic member 42 between the first support component 411 and the second support component 412. The extension size of the leaf spring is larger than that of the spring. The same number of leaf springs can provide a larger elastic force range than the spring. Therefore, a leaf spring is arranged between the first support component 411 and the second support component 412. The leaf spring provides sufficient elastic force for the first support component 411 and the second support component 412, while reducing the number of elastic members 42, simplifying the assembly process of the buffer component 4, reducing the cost of the buffer component 4, reducing the weight of the buffer component 4, and improving the energy density of the battery.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A buffer assembly, applied to a battery, characterized in that: include: The bearing mechanism comprises a first supporting component and a second supporting component which are arranged opposite to each other along a first direction; An elastic member is arranged between the first supporting member and the second supporting member, and the elastic member is arranged to be elastically deformable in the first direction so that the distance between the first supporting member and the second supporting member in the first direction is adjustable.

2. The buffer assembly according to claim 1, characterized in that: The buffer assembly further includes a force balancing mechanism, the force balancing mechanism includes a first force balancing component and / or a second force balancing component, the first force balancing component and the second force balancing component are both extended along at least one of a second direction and a third direction, the second direction intersects the third direction, The first force equalizing component is arranged between the elastic component and the first supporting component, the elastic component is connected to the first supporting component through the first force equalizing component, the second force equalizing component is connected between the elastic component and the second supporting component, and the elastic component is connected to the second supporting component through the second force equalizing component.

3. The buffer assembly according to claim 2, characterized in that: The elastic member includes two first connecting parts arranged opposite to each other in the extension direction thereof, the first force equalizing member includes a first segment, the two first segments are arranged between the first connecting part and the first supporting member, and the orthographic projection of the first connecting part in the first direction is within the first segment.

4. The buffer assembly according to claim 3, characterized in that: The first force equalizing member further includes a second segment, the first segment extends along the second direction, the second segment extends along the third direction, and the second segment is connected between two of the first segments.

5. The buffer assembly according to claim 4, characterized in that: The second segment is connected to the middle portions of the two first segments in the second direction.

6. The buffer assembly according to any one of claims 3 to 5, characterized in that: The elastic member includes a second connecting portion connected to a second supporting member, the second force equalizing member includes a third segment, the third segment is arranged between the second connecting portion and the second supporting member, and the orthographic projection of the second connecting portion in the first direction is within the third segment.

7. The buffer assembly according to claim 6, characterized in that: The second force equalizing component further includes a fourth segment. The third segment extends along the second direction, the fourth segment extends along the third direction, and two fourth segments are respectively disposed at two ends of the third segment.

8. The buffer assembly according to claim 7, characterized in that: The third segment is connected to the middle portion of the fourth segment in the third direction.

9. The buffer assembly according to claim 6, characterized in that: The first force equalizing member includes the first segment, and the first segment and the third segment extend in the same direction.

10. The buffer assembly according to claim 1, characterized in that: The elastic member is a leaf spring.

11. A battery box, characterized in that: It comprises a box body and a buffer assembly as described in any one of claims 1 to 10, wherein the buffer assembly is arranged in the box body.

12. A battery, characterized in that: It comprises a battery cell and the battery case as claimed in claim 11, wherein the battery cell is arranged on at least one side of the buffer assembly in the first direction.

13. An electrical device, characterized in that: The battery comprising the battery as claimed in claim 12 above.

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