Battery and electric device

Abstract

The utility model provides a battery and an electric device. The battery comprises a single battery body and a buffer assembly, the buffer assembly and the single battery body are arranged in the first direction, the buffer assembly comprises a conduction frame and a plurality of elastic parts, the elastic parts are arranged at intervals and used for applying elastic force to the single battery body, and the conduction frame is connected to the elastic parts. According to the invention, the energy density, the assembly efficiency and the reliability of the battery can be effectively improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In batteries, buffer components are usually provided to provide expansion buffer space for battery cells. The buffer components themselves have a certain structural complexity and will occupy a part of the internal space of the battery, which will affect the energy density, assembly efficiency and reliability of the battery. Therefore, how to effectively improve the energy density, assembly efficiency and reliability of the battery is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and an electrical device that can effectively improve the energy density, assembly efficiency and reliability of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, which includes a battery cell and a buffer assembly, wherein the buffer assembly and the battery cell are arranged along a first direction, the buffer assembly includes a conductive frame and a plurality of elastic members, the plurality of elastic members are arranged at intervals and used to apply elastic force to the battery cell, and the conductive frame is connected to the plurality of elastic members.

[0006] The above technical solution connects multiple elastic parts to each other by setting a conductive frame. On the one hand, it can reduce the number of elastic parts in the buffer assembly while maintaining the buffering performance of the buffer assembly, so as to reduce the structural complexity of the buffer assembly and simplify the assembly process, thereby improving the overall assembly efficiency of the battery and reducing the overall product cost of the battery; on the other hand, the reduction in the number of elastic parts in the buffer assembly can also reduce the overall mass of the buffer assembly, thereby reducing the mass proportion of the buffer assembly in the battery, thereby increasing the energy density of the battery; on yet another hand, multiple elastic parts are linked to each other and share the expansion force from the battery cell, which can reduce the risk of damage to the battery cell due to excessive contact pressure between the elastic parts and the battery cell, thereby improving the reliability of the battery.

[0007] In some embodiments of the first aspect, the conductive frame includes a connecting member and a plurality of supporting members, the plurality of supporting members are interconnected by the connecting member, the plurality of supporting members are arranged in one-to-one correspondence with the plurality of elastic members, and the supporting member is arranged at one end of the elastic member facing the battery cell.

[0008] The above technical solution configures the conductive frame to include a bearing member and a connecting member. The bearing member can increase the force-bearing area of ​​the conductive frame. On the one hand, it can improve the effect of the connecting frame on the conduction of the expansion force of the battery cell. On the other hand, it can reduce the risk of damage to the battery cell due to excessive contact pressure between the conductive frame and the battery cell.

[0009] In some embodiments of the first aspect, the connecting member includes a plurality of connecting rods, and any two adjacent bearing members among the plurality of bearing members are connected via the connecting rods.

[0010] The above technical solution can further improve the linkage between multiple elastic members, thereby improving the effect of the connector on transmitting the expansion force of the battery cell, and further reducing the risk of damage to the battery cell due to excessive contact pressure between the elastic member and the battery cell.

[0011] In some embodiments of the first aspect, in the first direction, the bearing member covers the elastic member.

[0012] The above technical solution can further increase the force-bearing area of ​​the carrier. On the one hand, it can further improve the transmission effect of the connecting frame on the expansion force of the battery cell; on the other hand, it can further reduce the risk of damage to the battery cell due to excessive contact pressure between the carrier and the battery cell.

[0013] In some embodiments of the first aspect, a convex portion is provided on one side of the carrier close to the elastic member, the elastic member is provided with a positioning hole matching the convex portion, and the convex portion is inserted into the positioning hole.

[0014] The above technical solution can limit the risk of relative movement between the bearing member and the elastic member in a direction perpendicular to the first direction by arranging a convex portion on the bearing member, and the convex portion is plugged into the positioning hole, thereby improving the reliability of the buffer assembly.

[0015] In some embodiments of the first aspect, the bearing member and the connecting member are an integrally formed structure.

[0016] On the one hand, there is no need to connect the carrier and the connecting member through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the carrier and the connecting member through an additional connection process, the carrier and the connecting member in an integrated structure have a higher connection firmness.

[0017] In some embodiments of the first aspect, the battery cell includes a first region and a second region, the first region surrounds the second region, the plurality of elastic members include a first elastic member and a second elastic member, the first elastic member abuts against the first region, the second elastic member abuts against the second region, and the elastic coefficient of the second elastic member is greater than the elastic coefficient of the first elastic member.

[0018] The above technical solution arranges elastic parts with different elastic coefficients in areas with different expansion forces of the battery cells, so that the buffer assembly can provide different degrees of resistance to areas with different expansion forces of the battery cells, and can further improve the buffering effect of the buffer assembly on the battery cells.

[0019] In some embodiments of the first aspect, the number of the first elastic members is greater than the number of the second elastic members.

[0020] In this way, the above technical solution can further improve the buffering effect of the buffer assembly on the battery cell by specifically arranging different numbers of elastic members in areas with different spans of the battery cell.

[0021] In some embodiments of the first aspect, the number of the conductive frames is two, and the two conductive frames are respectively disposed on two opposite sides of the plurality of elastic members along the first direction.

[0022] The above technical solution enables the two opposite sides of the multiple elastic members along the first direction to be linked to each other through the conductive frame, thereby further improving the force conduction effect between the multiple elastic members, and further improving the buffering effect of the buffer assembly on the battery cell.

[0023] In some embodiments of the first aspect, the buffer assembly further includes a support component disposed between the buffer assembly and the battery cell.

[0024] The above technical solution sets a support component, which can further increase the contact area between the buffer assembly and the battery cell. On the one hand, it can further reduce the risk of damage to the battery cell due to excessive contact pressure between the buffer assembly and the battery cell; on the other hand, it can further improve the uniformity of force conduction between the battery cell and the buffer assembly.

[0025] In some embodiments of the first aspect, a positioning groove is formed on the supporting component, and at least a portion of the buffer assembly is disposed in the positioning groove.

[0026] The positioning groove can position the buffer assembly, and during the assembly process of the battery, it is convenient to align the position between the buffer assembly and the supporting component, which is helpful to reduce the assembly time, thereby further improving the overall assembly efficiency of the battery.

[0027] In some embodiments of the first aspect, there are multiple positioning grooves, and the multiple positioning grooves correspond to the multiple elastic members one by one, so as to further improve the position alignment efficiency between the buffer assembly and the support component.

[0028] In some embodiments of the first aspect, a projection of the support component along the first direction covers a projection of the buffer component along the first direction.

[0029] The above technical solution can further increase the force-bearing area of ​​the support component. On the one hand, it can further improve the transmission effect of the support component on the expansion force of the battery cell and the elastic force of the buffer component; on the other hand, it can further reduce the risk of damage to the battery cell due to excessive contact pressure between the support component and the battery cell.

[0030] In some embodiments of the first aspect, the support member includes a flexible body.

[0031] The flexible body can be deformed quickly to transmit the pressure to the buffer assembly, which can improve the transmission efficiency of the expansion force of the battery cell. At the same time, the flexible body can be adaptively deformed according to the shape of the battery cell and the elastic body in the buffer assembly, so as to maintain the elastic member squeezing the surface of the battery cell, improve the uniformity of the force on the battery cell, and reduce the generation of squeezing dead angles.

[0032] In some embodiments of the first aspect, the conductive frame is fixedly connected to the elastic member.

[0033] The above technical solution can reduce the risk of relative movement between the conductive frame and the elastic member, and improve the reliability of the buffer assembly.

[0034] In some embodiments of the first aspect, the elastic member includes a spring. Compared with other elastic members such as rubber blocks, the spring has strong replaceability and high reliability, which is conducive to improving the reliability of the buffer assembly as a whole.

[0035] In some embodiments of the first aspect, the battery cell comprises a pouch battery cell.

[0036] By providing a buffer assembly, a buffer function can be better provided to the soft-pack battery cell, so as to maintain the performance of the soft-pack battery cell and increase the life of the soft-pack battery cell.

[0037] In a second aspect, the present application provides an electrical device, which includes a battery provided by any embodiment of the first aspect, and the battery is used to provide electrical energy.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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:

[0040] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0041] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0042] Figure 3 A schematic diagram of a partial explosion structure of a battery provided in some embodiments of the present application;

[0043] Figure 4 A schematic structural diagram of another battery buffer assembly provided in some embodiments of the present application;

[0044] Figure 5 A schematic diagram of an exploded structure of a buffer assembly of another battery provided in some embodiments of the present application;

[0045] Figure 6 A schematic diagram of a partial explosion structure of another battery provided in some embodiments of the present application;

[0046] Figure 7 A schematic structural diagram of a buffer assembly of a battery provided in some embodiments of the present application;

[0047] Figure 8 A schematic diagram of an exploded structure of a buffer assembly and a support component of a battery provided in some embodiments of the present application.

[0048] The reference numerals in the specific implementation manner are as follows:

[0049] 1. Vehicle; 2. Battery; 21. End plate; 3. Controller; 4. Motor; 5. Battery cell; 51. First area; 52. Second area; 6. Buffer assembly; 7. Support component;

[0050] 10. Conducting frame; 11. Connecting member; 111. Connecting rod; 12. Carrying member; 121. Protrusion; 20. Elastic member; 20a. First elastic member; 20b. Second elastic member; 201. Positioning hole; 30. Positioning groove; X. First direction. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0053] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0057] The term "plurality" used in the present application refers to two or more (including two).

[0058] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0059] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-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 may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0060] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0061] In some embodiments, the battery may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0062] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0063] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0064] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0065] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0066] In batteries, a buffer assembly is usually provided to provide expansion buffer space for battery cells. In order to form a more uniform support for the battery cells, a large number of elastic parts are usually provided in the buffer assembly to provide elastic force to different areas of the battery cells. On the one hand, a large number of elastic parts will make the structure of the buffer assembly more complex and the assembly process more complicated, which will seriously affect the assembly efficiency of the battery and make the product cost of the battery higher; on the other hand, a large number of elastic parts will also make the overall mass of the buffer assembly larger, thereby increasing the mass proportion of the buffer assembly in the battery, thereby affecting the energy density of the battery; on the other hand, a large number of elastic parts are independently abutted against the battery cells. During the expansion process of the battery cells, there are differences in the amount of expansion between different areas of the battery cells, which makes it easy for the contact pressure between individual elastic parts and the battery cells to be too large, resulting in the risk of damage due to excessive local stress in the battery cells, thereby affecting the reliability of the battery.

[0067] Based on the above considerations, the present application designs a battery, which includes a battery cell and a buffer assembly. The buffer assembly and the battery cell are arranged along a first direction. The buffer assembly includes a conductive frame and multiple elastic members. The multiple elastic members are arranged at intervals and are used to apply elastic force to the battery cell. The conductive frame is connected to the multiple elastic members.

[0068] The multiple elastic members of the above technical solution are connected to each other through the conductive frame, so that the multiple elastic members can be linked to each other. During the expansion of the battery cell, when the battery cell applies an expansion force to one of the multiple elastic members and causes it to produce elastic deformation, the elastic member will drive the other elastic members to produce elastic deformation together through the conductive frame during the elastic deformation process, so that part of the expansion force from the battery cell on the elastic member will be transmitted to the other elastic members through the conductive frame.

[0069] In this way, on the one hand, the number of elastic parts in the buffer assembly can be reduced while maintaining the buffering performance of the buffer assembly, so as to reduce the structural complexity of the buffer assembly and simplify the assembly process, thereby improving the overall assembly efficiency of the battery and reducing the overall product cost of the battery; on the other hand, the reduction in the number of elastic parts in the buffer assembly can also reduce the overall mass of the buffer assembly, thereby reducing the mass proportion of the buffer assembly in the battery, thereby increasing the energy density of the battery; on still another hand, multiple elastic parts are linked to each other and share the expansion force from the battery cell, which can reduce the risk of damage to the battery cell due to excessive contact pressure between the elastic parts and the battery cell, thereby improving the reliability of the battery.

[0070] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0071] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. 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, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include 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, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0072] 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 battery boxes and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0073] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0074] Continue to refer Figure 1 The vehicle 1 is provided with a battery 2 inside, and the battery 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery 2 can be used for powering the vehicle 1, for example, the battery 2 can be used as an operating power source for the vehicle 1.

[0075] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0076] In some embodiments of the present application, the battery 2 can not only serve as an operating power source for the vehicle 1, but also serve 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.

[0077] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application, Figure 3 A schematic diagram of a partial explosion structure of a battery provided in some embodiments of the present application.

[0078] Continue to refer Figures 2 to 3 An embodiment of the present application provides a battery 2, which includes a battery cell 5 and a buffer assembly 6. The buffer assembly 6 and the battery cell 5 are arranged along a first direction X. The buffer assembly 6 includes a conductive frame 10 and a plurality of elastic members 20. The plurality of elastic members 20 are arranged at intervals and are used to apply elastic force to the battery cell 5. The conductive frame 10 is connected to the plurality of elastic members 20.

[0079] In the battery 2, the battery cell 5 may be one or more. If there are more than one battery cell 5, the multiple battery cells 5 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 5 are both connected in series and in parallel. Exemplarily, the battery 2 may include a battery cell 5 and two end plates 21. If there is one battery cell 5, the two end plates 21 are respectively arranged on both sides of the battery cell 5 along the first direction X; if there are more than one battery cell 5, the multiple battery cells 5 are arranged along the first direction X, and the two end plates 21 are respectively arranged on both sides of the multiple battery cells 5 along the first direction X.

[0080] The buffer assembly 6 can provide expansion buffer space for the battery cell 5. The buffer assembly 6 can be arranged between two adjacent battery cells 5 along the first direction X, or the buffer assembly 6 can be arranged between the battery cell 5 and the end plate 21. Optionally, the buffer assembly 6 can be detachably connected to the battery cell 5, or can be fixedly connected to the battery cell 5. In the case where the buffer assembly 6 is fixedly connected to the battery cell 5, the buffer assembly 6 can be directly connected to the battery cell 5, or can be restricted to the battery cell 5 by other components. As an example, the connection method between the buffer assembly 6 and the battery cell 5 can be but not limited to bolt connection, welding, riveting, clamping or bonding, etc.

[0081] The multiple elastic members 20 are connected to each other through the conductive frame 10, so that the multiple elastic members 20 can be linked to each other. When the battery cell 5 expands, when the battery cell 5 applies an expansion force to one of the multiple elastic members 20 and causes it to elastically deform, the elastic member 20 drives the other elastic members 20 to elastically deform together through the conductive frame 10 during the elastic deformation process, so that part of the expansion force from the battery cell 5 on the elastic member 20 is transmitted to the other elastic members 20 through the conductive frame 10.

[0082] As an example, the number of the elastic members 20 may be, but is not limited to, two, three, four, five or more.

[0083] Optionally, the elastic member 20 may be detachably connected to the conductive frame 10, or may be fixedly connected to the conductive frame 10. In the case where the elastic member 20 is fixedly connected to the conductive frame 10, the elastic member 20 may be directly connected to the conductive frame 10, or may be restricted to the conductive frame 10 by other components. As an example, the connection method between the elastic member 20 and the conductive frame 10 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0084] Optionally, the elastic member 20 may be, but is not limited to, made of spring steel, rubber, silicone, polyurethane, polyolefin, etc. As an example, the elastic member 20 is a spring, which may be, but is not limited to, a disc spring, an annular spring, a leaf spring, a spiral spring, a truncated cone scroll spring, or a torsion bar spring.

[0085] Optionally, the conductive frame 10 may be but is not limited to being made of metal or non-metal materials. For example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metal material may be polyethylene, polypropylene, polyvinyl chloride or wood, etc.

[0086] The above technical solution connects multiple elastic members 20 to each other by setting a conductive frame 10. On the one hand, it can reduce the number of elastic members 20 in the buffer assembly 6 while maintaining the buffering performance of the buffer assembly 6, so as to reduce the structural complexity of the buffer assembly 6 and simplify the assembly process, thereby improving the overall assembly efficiency of the battery 2 and reducing the overall product cost of the battery 2; on the other hand, the reduction in the number of elastic members 20 in the buffer assembly 6 can also reduce the overall mass of the buffer assembly 6, thereby reducing the mass proportion of the buffer assembly 6 in the battery 2, thereby improving the energy density of the battery 2; on the other hand, the multiple elastic members 20 are linked to each other and share the expansion force from the battery cell 5, which can reduce the risk of damage to the battery cell 5 due to excessive contact pressure between the elastic member 20 and the battery cell 5, thereby improving the reliability of the battery 2.

[0087] In some embodiments, the conductive frame 10 includes a connector 11 and multiple carriers 12 . The multiple carriers 12 are interconnected through the connector 11 . The multiple carriers 12 are arranged in a one-to-one correspondence with the multiple elastic members 20 . The carriers 12 are arranged at one end of the elastic member 20 facing the battery cell 5 .

[0088] The bearing member 12 may be detachably connected to the connecting member 11, or may be fixedly connected to the connecting member 11. In the case where the bearing member 12 is fixedly connected to the connecting member 11, the bearing member 12 may be directly connected to the connecting member 11, or may be restricted to the connecting member 11 by other components. As an example, the connection method between the bearing member 12 and the connecting member 11 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0089] The number of the bearing members 12 may be, but is not limited to, two, three, four, five or more, and the number of the bearing members 12 matches the number of the elastic members 20. As an example, when the number of the elastic members 20 is two, the number of the bearing members 12 is two; as another example, when the number of the elastic members 20 is five, the number of the bearing members 12 is five.

[0090] Optionally, the projection shape of the carrier 12 along the first direction X may be, but is not limited to, a circle, a triangle, a rectangle, a trapezoid, an ellipse, or the like.

[0091] The above technical solution configures the conductive frame 10 to include a bearing member 12 and a connecting member 11. The bearing member 12 can increase the force-bearing area of ​​the conductive frame 10. On the one hand, it can improve the effect of the connecting frame on the conduction of the expansion force of the battery cell 5. On the other hand, it can reduce the risk of damage to the battery cell 5 due to excessive contact pressure between the conductive frame 10 and the battery cell 5.

[0092] In some embodiments, the connecting member 11 includes a plurality of connecting rods 111 , and any two adjacent bearing members 12 among the plurality of bearing members 12 are connected via the connecting rods 111 .

[0093] Exemplarily, two carriers 12 being adjacent means that there is no obstacle on a straight path between the two carriers 12. The number of the connecting rods 111 may be, but is not limited to, two, three, four, five or more.

[0094] The above technical solution can further improve the linkage between multiple elastic members 20, thereby improving the effect of the connector 11 transmitting the expansion force of the battery cell 5, and further reducing the risk of damage to the battery cell 5 due to excessive contact pressure between the elastic member 20 and the battery cell 5.

[0095] Figure 4 A schematic structural diagram of another battery buffer assembly provided in some embodiments of the present application.

[0096] Continue to refer Figure 4 In some embodiments, in the first direction X, the carrier 12 covers the elastic member 20 .

[0097] Exemplarily, the supporting member 12 covering the elastic member 20 in the first direction X means that the projection of the elastic member 20 in the first direction X is located within the projection of the supporting member 12 in the first direction X.

[0098] The above technical solution can further increase the force-bearing area of ​​the carrier 12. On the one hand, it can further improve the transmission effect of the connecting frame on the expansion force of the battery cell 5; on the other hand, it can further reduce the risk of damage to the battery cell 5 due to excessive contact pressure between the carrier 12 and the battery cell 5.

[0099] Figure 5 A schematic diagram of an exploded structure of a buffer assembly of another battery provided in some embodiments of the present application.

[0100] Continue to refer Figure 5 In some embodiments, a convex portion 121 is provided on one side of the carrier 12 close to the elastic member 20 , and a positioning hole 201 matching the convex portion 121 is opened in the elastic member 20 , and the convex portion 121 is inserted into the positioning hole 201 .

[0101] Exemplarily, the protrusion 121 protrudes from a side surface of the carrier 12 close to the elastic member 20 , and the protrusion 121 extends along the first direction X. The protrusion 121 cooperates with the positioning hole 201 to limit the risk of relative movement between the carrier 12 and the elastic member 20 perpendicular to the first direction X.

[0102] The protrusion 121 may be detachably connected to the carrier 12, or may be fixedly connected to the carrier 12. In the case where the protrusion 121 is fixedly connected to the carrier 12, the protrusion 121 may be directly connected to the carrier 12, or may be restricted to the carrier 12 by other components. As an example, the connection method between the protrusion 121 and the carrier 12 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0103] Optionally, the protrusion 121 and the carrier 12 are integrally formed. On the one hand, there is no need to connect the protrusion 121 and the carrier 12 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the protrusion 121 and the carrier 12 through an additional connection process, the protrusion 121 and the carrier 12 in an integral structure have a higher connection firmness.

[0104] Optionally, the protrusion 121 may be, but is not limited to, made of metal or non-metal material, for example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metal material may be polyethylene, polypropylene, polyvinyl chloride or wood, etc. As an example, the protrusion 121 and the carrier 12 are made of the same material to simplify the manufacturing process and help reduce costs.

[0105] The above technical solution provides a protrusion 121 on the carrier 12. The protrusion 121 is inserted into the positioning hole 201 to limit the risk of relative movement between the carrier 12 and the elastic member 20 along the direction perpendicular to the first direction X, thereby improving the reliability of the buffer assembly 6.

[0106] In some embodiments, the carrier 12 and the connector 11 are an integrally formed structure.

[0107] On the one hand, there is no need to connect the carrier 12 and the connecting member 11 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the carrier 12 and the connecting member 11 through an additional connection process, the carrier 12 and the connecting member 11 in an integrated structure have a higher connection firmness.

[0108] Figure 6 A schematic diagram of a partial explosion structure of another battery provided in some embodiments of the present application.

[0109] Continue to refer Figure 6In some embodiments, the battery cell 5 includes a first region 51 and a second region 52, the first region 51 surrounds the second region 52, and the plurality of elastic members 20 include a first elastic member 20a and a second elastic member 20b. The first elastic member 20a abuts against the first region 51, the second elastic member 20b abuts against the second region 52, and the elastic coefficient of the second elastic member 20b is greater than the elastic coefficient of the first elastic member 20a.

[0110] Exemplarily, the elastic coefficient refers to the ratio between the elastic force and the deformation generated by the elastic member 20 within a unit length, which can represent the response degree of the elastic member 20 to the external load. In other words, the elastic member 20 with a larger elastic coefficient requires a larger force to produce a unit deformation. Among them, the elastic coefficient of the elastic member 20 is mainly measured and obtained using Hooke's law F=k*x, k is the elastic coefficient of the elastic member 20, F is the elastic force of the elastic member 20, and x is the elastic deformation generated by the elastic member 20. Specifically, the specific measurement method can be but is not limited to the suspension method, Young's modulus method, sonic method or bending method and other measurement methods, which will not be repeated here.

[0111] The first region 51 can be understood as the circumferential edge region of the battery cell 5, and the second region 52 can be understood as the middle region of the battery cell 5. It can be understood that during the expansion of the battery cell 5, the expansion force of the second region 52 of the battery cell 5 is greater than the expansion force of the first region 51 of the battery cell 5. In this way, the first elastic member 20a with a reduced elastic coefficient is provided for the first region 51 of the battery cell 5, and the second elastic member 20b with a higher elastic coefficient is provided for the second region 52 of the battery cell 5, which can reduce the deformation difference of the multiple elastic members 20 during the expansion of the battery 2.

[0112] Optionally, the number of the first elastic member 20a may be one or more, and the number of the second elastic member 20b may be one or more.

[0113] The above technical solution arranges elastic members 20 with different elastic coefficients in areas with different expansion forces of the battery cells 5 in a targeted manner, so that the buffer assembly 6 can provide different degrees of resistance to areas with different expansion forces of the battery cells 5, thereby further improving the buffering effect of the buffer assembly 6 on the battery cells 5.

[0114] In some embodiments, the number of the first elastic members 20 a is greater than the number of the second elastic members 20 b .

[0115] As described above, the first region 51 can be understood as the circumferential edge region of the battery cell 5, and the second region 52 can be understood as the middle region of the battery cell 5. It can be understood that the span of the first region 51 of the battery cell 5 is greater than the span of the second region 52 of the battery cell 5. In other words, the first region 51 of the battery cell 5 is more dispersed, and the second region 52 of the battery cell 5 is more concentrated. In this way, if you want to make the first region 51 of the battery cell 5 more evenly supported, you need to set more first elastic members 20a.

[0116] In this way, the above technical solution can further improve the buffering effect of the buffer assembly 6 on the battery cell 5 by specifically arranging different numbers of elastic members 20 in areas with different spans of the battery cell 5 .

[0117] Figure 7 A schematic structural diagram of a buffer assembly of a battery provided in some embodiments of the present application.

[0118] Continue to refer Figure 7 In some embodiments, the number of the conductive frames 10 is two, and the two conductive frames 10 are respectively disposed on two opposite sides of the plurality of elastic members 20 along the first direction X.

[0119] Exemplarily, the elastic member 20 may be detachably connected to the two conductive frames 10 , may be fixedly connected to the two conductive frames 10 , or may be detachably connected to one of the two conductive frames 10 and fixedly connected to the other of the two conductive frames 10 .

[0120] The above technical solution enables the two opposite sides of the multiple elastic members 20 along the first direction X to be linked to each other through the conductive frame 10, thereby further improving the force conduction effect between the multiple elastic members 20, and further improving the buffering effect of the buffer assembly 6 on the battery cell 5.

[0121] Figure 8 A schematic diagram of an exploded structure of a buffer assembly and a support component of a battery provided in some embodiments of the present application.

[0122] Continue to refer Figure 8 In some embodiments, the buffer assembly 6 further includes a supporting component 7 , and the supporting component 7 is disposed between the buffer assembly 6 and the battery cell 5 .

[0123] Exemplarily, the number of support components 7 can be one, and one support component 7 is connected to one of the two opposite sides of the buffer component 6 along the first direction X; the number of support components 7 can be two, and the two support components 7 are respectively connected to the two opposite sides of the buffer component 6 along the first direction X.

[0124] The support component 7 may be connected to the conductive frame 10 or to the elastic member 20. As an example, the number of the support component 7 is one, and the one support component 7 is connected to the side of the conductive frame 10 facing away from the elastic member 20; as another example, the number of the support component 7 is one, and the one support component 7 is connected to the side of the elastic member 20 facing away from the conductive frame 10; as another example, the number of the support components 7 is two, and one of the two support components 7 is connected to the side of the elastic member 20 facing away from the conductive frame 10, and the other support component 7 is connected to the side of the conductive frame 10 facing away from the elastic member 20.

[0125] Optionally, the support component 7 can be detachably connected to the buffer component 6, or can be fixedly connected to the buffer component 6. In the case where the support component 7 is fixedly connected to the buffer component 6, the support component 7 can be directly connected to the buffer component 6, or can be restricted to the buffer component 6 by other components. As an example, the connection method between the support component 7 and the buffer component 6 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0126] Optionally, the support member 7 may be, but is not limited to, a plate-shaped structure, a block-shaped structure or a columnar structure. The support member 7 may be, but is not limited to, made of metal or non-metal material, for example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metal material may be polyethylene, polypropylene, polyvinyl chloride or wood, etc.

[0127] The above technical solution arranges a support component 7, and the support component 7 is arranged between the buffer assembly 6 and the battery cell 5. The support component 7 can further increase the contact area between the buffer assembly 6 and the battery cell 5. On the one hand, it can further reduce the risk of damage to the battery cell 5 due to excessive contact pressure between the buffer assembly 6 and the battery cell 5; on the other hand, it can further improve the uniformity of force conduction between the battery cell 5 and the buffer assembly 6.

[0128] In some embodiments, a positioning groove 30 is formed on the supporting component 7 , and at least a portion of the buffer assembly 6 is disposed in the positioning groove 30 .

[0129] The positioning groove 30 is recessed relative to the side of the support component 7 close to the buffer component 6. The positioning groove 30 can position the buffer component 6, and during the assembly process of the battery 2, it is convenient to align the position between the buffer component 6 and the support component 7, which is conducive to reducing the assembly time, thereby further improving the overall assembly efficiency of the battery 2.

[0130] Optionally, the projection shape of the positioning groove 30 along the first direction X may be, but is not limited to, a circle, a triangle, a rectangle, a trapezoid or an ellipse.

[0131] In some embodiments, there are multiple positioning grooves 30 , and the multiple positioning grooves 30 correspond one-to-one to the multiple elastic members 20 to further improve the position alignment efficiency between the buffer component 6 and the support component 7 .

[0132] In some embodiments, a projection of the support component 7 along the first direction X covers a projection of the buffer component 6 along the first direction X.

[0133] Exemplarily, the projection of the supporting component 7 along the first direction X covers the projection of the buffer assembly 6 along the first direction X, which means that the projection of the buffer assembly 6 along the first direction X is located within the projection of the supporting component 7 along the first direction X.

[0134] The above technical solution can further increase the force-bearing area of ​​the support component 7. On the one hand, it can further improve the transmission effect of the support component 7 on the expansion force of the battery cell 5 and the elastic force of the buffer component 6; on the other hand, it can further reduce the risk of damage to the battery cell 5 due to excessive contact pressure between the support component 7 and the battery cell 5.

[0135] In some embodiments, the support member 7 comprises a flexible body.

[0136] For example, when the battery cell 5 expands during the cycle, the flexible body can be deformed quickly to transmit the pressure to the buffer assembly 6, which can improve the transmission efficiency of the expansion force of the battery cell 5. At the same time, the flexible body can be adaptively deformed according to the shape of the battery cell 5 and the elastic body in the buffer assembly 6, so as to maintain the elastic member 20 squeezing the surface of the battery cell 5, improve the uniformity of the force on the battery cell 5, and reduce the generation of squeezing dead corners.

[0137] In some embodiments, the conductive frame 10 is fixedly connected to the elastic member 20 .

[0138] For example, the elastic member 20 may be directly connected to the conductive frame 10, or may be restricted on the conductive frame 10 through other components. For example, the connection between the elastic member 20 and the conductive frame 10 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0139] The above technical solution can reduce the risk of relative movement between the conductive frame 10 and the elastic member 20 and improve the reliability of the buffer assembly 6 .

[0140] In some embodiments, the elastic member 20 is a spring. Compared with other elastic members 20 such as rubber blocks, the spring has strong replaceability and high reliability, which is beneficial to improving the reliability of the buffer assembly 6 as a whole.

[0141] As an example, the spring may be, but is not limited to, a disc spring, an annular spring, a leaf spring, a helical spring, a truncated cone scroll spring, a torsion bar spring, or the like.

[0142] In some embodiments, the battery cell 5 includes a soft-pack battery cell. By providing the buffer assembly 6, a buffer function can be better provided to the soft-pack battery cell to maintain the performance of the soft-pack battery cell and to increase the life of the soft-pack battery cell.

[0143] According to some embodiments of the present application, the present application further provides an electrical device, comprising a battery 2 according to any of the above schemes, wherein the battery 2 is used only to provide electrical energy.

[0144] In order to better understand the battery 2 provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery 2 in practical application is provided here for illustration.

[0145] The embodiment of the present application provides a battery 2, the battery 2 includes a soft-pack battery cell and a buffer assembly 6, the buffer assembly 6 and the soft-pack battery cell are arranged along a first direction X, the buffer assembly 6 includes a conductive frame 10 and a plurality of springs, the plurality of springs are arranged at intervals and are used to apply elastic force to the soft-pack battery cell. The conductive frame 10 includes a plurality of connecting rods 111 and a plurality of bearing members 12, any two adjacent bearing members 12 among the plurality of bearing members 12 are connected by the connecting rod 111, the plurality of bearing members 12 are arranged one by one with the plurality of springs, and the bearing member 12 is arranged at one end of the spring facing the soft-pack battery cell.

[0146] The above technical solution connects multiple springs to each other by setting a conductive frame 10. On the one hand, it can reduce the number of springs in the buffer assembly 6 while maintaining the buffering performance of the buffer assembly 6, so as to reduce the structural complexity of the buffer assembly 6 and simplify the assembly process, thereby improving the overall assembly efficiency of the battery 2 and reducing the overall product cost of the battery 2; on the other hand, the reduction in the number of springs in the buffer assembly 6 can also reduce the overall mass of the buffer assembly 6, thereby reducing the mass proportion of the buffer assembly 6 in the battery 2, thereby improving the energy density of the battery 2; on the other hand, the multiple springs are linked to each other and share the expansion force from the battery cell 5, which can reduce the risk of damage to the soft-pack battery cell due to excessive contact pressure between the spring and the soft-pack battery cell, thereby improving the reliability of the battery 2.

[0147] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0148] 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 battery, characterized in that: include: Battery cells; The buffer assembly is arranged along the first direction with the battery cell, and comprises a conductive frame and a plurality of elastic members, wherein the plurality of elastic members are arranged at intervals and used to apply elastic force to the battery cell, and the conductive frame is connected to the plurality of elastic members.

2. The battery according to claim 1, characterized in that The conductive frame includes a connecting member and a plurality of bearing members, the plurality of bearing members are connected to each other through the connecting member, the plurality of bearing members are arranged in one-to-one correspondence with the plurality of elastic members, and the bearing member is arranged at one end of the elastic member facing the battery cell.

3. The battery according to claim 2, characterized in that The connecting member includes a plurality of connecting rods, and any two adjacent bearing members among the plurality of bearing members are connected via the connecting rods.

4. The battery according to claim 2, characterized in that In the first direction, the supporting member covers the elastic member.

5. The battery according to claim 2, characterized in that A convex portion is arranged on one side of the bearing member close to the elastic member, a positioning hole matching the convex portion is opened on the elastic member, and the convex portion is plugged into the positioning hole.

6. The battery according to claim 2, characterized in that The bearing member and the connecting member are an integrally formed structure.

7. The battery according to claim 1, characterized in that The battery cell includes a first area and a second area, the first area surrounds the second area, and the plurality of elastic members include a first elastic member and a second elastic member; The first elastic member abuts against the first region, the second elastic member abuts against the second region, and the elastic coefficient of the second elastic member is greater than the elastic coefficient of the first elastic member.

8. The battery according to claim 7, characterized in that The number of the first elastic members is greater than the number of the second elastic members.

9. The battery according to claim 1, characterized in that The number of the conducting frames is two, and the two conducting frames are respectively arranged on two opposite sides of the plurality of elastic members along the first direction.

10. The battery according to claim 1, characterized in that The buffer assembly further includes a supporting component disposed between the buffer assembly and the battery cell.

11. The battery according to claim 10, characterized in that The supporting component is provided with a positioning groove, and at least a part of the buffer component is arranged in the positioning groove.

12. The battery according to claim 11, characterized in that There are multiple positioning grooves, and the multiple positioning grooves correspond to the multiple elastic members one by one.

13. The battery according to claim 10, characterized in that The projection of the supporting component along the first direction covers the projection of the buffer component along the first direction.

14. The battery according to claim 10, characterized in that The supporting member includes a flexible body.

15. The battery according to claim 1, characterized in that The conductive frame is fixedly connected to the elastic member.

16. The battery according to claim 1, characterized in that The elastic member includes a spring.

17. The battery according to any one of claims 1 to 16, characterized in that: The battery cells include soft-pack battery cells.

18. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 17, wherein the battery is used to provide electrical energy.

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