Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, the battery comprises a battery monomer, a box body and a protective plate, one side of the battery monomer along a first direction is provided with an electrode terminal, and the box body forms an accommodating space for accommodating the battery monomer; the protective plate is arranged in the accommodating space and is positioned on one side of the battery monomer along the first direction, the protective plate comprises a main body part and a buffer part which are connected with each other, and the buffer part protrudes out of one side of the main body part facing the battery monomer and is opposite to the electrode terminal along the first direction. According to the structure, the buffer part in the protective plate protrudes from one side, facing the battery monomer, of the main body part and is opposite to the electrode terminal along the first direction, so that when the protective plate is impacted and deformed, the buffer part can be in contact with the electrode terminal of the battery monomer with better strength; and the buffer part can buffer the acting force between the protective plate and the battery monomer, so that the electrode terminal of the battery monomer is not easy to deform, the impact resistance of the battery is improved, and the reliability of the battery is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery and an electrical device using the same. Background Art

[0002] Batteries have advantages such as high specific energy and high power density, and are widely used in electronic devices and transportation means, such as mobile phones, laptop computers, battery cars, electric vehicles, electric airplanes, electric ships, and electric tools, etc.

[0003] With the continuous expansion of the application scope of batteries in various fields, the reliability of batteries has increasingly attracted the attention of those skilled in the art. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a battery and an electrical device using the same. The battery has good impact resistance performance, which is beneficial to improving the reliability of the battery.

[0005] In a first aspect, some embodiments of the present application provide a battery, which includes a battery cell, a box body, and a protection plate. An electrode terminal is provided on one side of the battery cell along a first direction; the box body forms an accommodation space for accommodating the battery cell; the protection plate is disposed in the accommodation space and on one side of the battery cell along the first direction. The protection plate includes a main body portion and a buffer portion connected to each other. The buffer portion protrudes from the side of the main body portion facing the battery cell and is opposite to the electrode terminal along the first direction.

[0006] In the above structure, since the buffer portion in the protection plate protrudes from the side of the main body portion facing the battery cell and is opposite to the electrode terminal along the first direction, when the protection plate is impacted and deformed, the buffer portion can contact the electrode terminal of the battery cell with better strength, and the buffer portion can buffer the force between the protection plate and the battery cell, so that the electrode terminal of the battery cell is not easily deformed, which is beneficial to improving the impact resistance performance of the battery, thereby improving the reliability of the battery.

[0007] According to the battery provided by some embodiments of the present application, a pressure relief mechanism is provided on one side of the battery cell along the first direction. The pressure relief mechanism is opposite to the main body portion along the first direction, so that the pressure relief mechanism can communicate the inside of the battery cell with the gap between the battery cell and the main body portion, facilitating the discharge of the internal substances of the battery cell.

[0008] According to the battery provided by some embodiments of the present application, the protection plate includes a plurality of buffer portions spaced apart along a second direction, and the second direction is perpendicular to the first direction; a pressure relief mechanism is provided on one side of the battery cell along the first direction, and the pressure relief mechanism corresponds to the gap between two adjacent buffer portions, so that the gap between two adjacent buffer portions can provide an avoidance space for the pressure relief mechanism, facilitating the operation of the pressure relief mechanism.

[0009] According to the battery provided by some embodiments of the present application, the protection plate is provided with reinforcing ribs, and the reinforcing ribs are connected to two adjacent buffer parts, which not only enables the reinforcing ribs to better strengthen the structure of the protection plate, but also enables the reinforcing ribs to make full use of the space between two adjacent buffer parts.

[0010] According to the battery provided by some embodiments of the present application, the battery further includes a bus bar, at least part of the bus bar is located between the buffer part and the electrode terminal and is connected to the electrode terminal, so that the buffer part can abut against the bus bar, enabling the bus bar to improve the structural strength of the contact position between the buffer part and the battery cell, which is beneficial to reducing the deformation at the electrode terminal when being impacted, beneficial to improving the impact resistance of the battery, and thus improving the reliability of the battery.

[0011] According to the battery provided by some embodiments of the present application, the battery further includes a separator plate, the separator plate is located on the side of the protection plate facing the battery cell and separates the battery cell from the protection plate; the bus bar is fixed to the separator plate, so that when the protection plate is impacted and deformed, the buffer part can abut against the separator plate, which can reduce the impact on the battery cell and is beneficial to reducing the deformation of the battery cell.

[0012] According to the battery provided by some embodiments of the present application, the battery further includes a pressing strip, the pressing strip is connected between the protection plate and the separator plate, so that the protection plate can support and fix the separator plate through the pressing strip to form an integral structure of the battery.

[0013] According to the battery provided by some embodiments of the present application, the pressing strip is bonded to the protection plate, so that the pressing strip can be conveniently connected to the protection plate, which is beneficial to improving the assembly efficiency of the battery and the production efficiency.

[0014] According to the battery provided by some embodiments of the present application, at least one buffer part includes at least two convex parts, the at least two convex parts are arranged at intervals, and the pressing strip is located in the gap between two adjacent convex parts in the buffer part, so that the pressing strip will not interfere with the reinforcing ribs, facilitating the arrangement of the pressing strip.

[0015] According to the battery provided by some embodiments of the present application, a glue-limiting boss is convexly arranged on the surface of the protection plate facing the separator plate, the glue-limiting boss is located between two adjacent convex parts in the buffer part and abuts against the pressing strip to form a glue-containing gap for accommodating the bonding glue between the pressing strip and the protection plate, so that the bonding glue has a sufficient thickness to firmly bond the pressing strip and the protection plate.

[0016] According to the battery provided by some embodiments of the present application, the battery further includes a reinforcing beam, the reinforcing beam is connected to the protection plate and the box body, so that the overall strength of the battery can be improved.

[0017] According to the battery provided by some embodiments of the present application, the protection plate includes two plate bodies and a buffer layer disposed between the two plate bodies. The buffer layer is an elastic structure layer, and the plate body is a composite material part; the plate body includes a connection area and a buffer area. The connection areas of the two plate bodies are stacked and connected, and the buffer layer is located between the buffer areas of the two plate bodies; the main body part includes the connection areas of the two plate bodies, and the buffer part includes the buffer areas of the two plate bodies and the buffer layer.

[0018] According to the battery provided by some embodiments of the present application, the two plate bodies are integrally formed structures, so that the protection plate has good structural integrity and is beneficial to improving the structural strength of the protection plate.

[0019] In a second aspect, some embodiments of the present application provide an electrical device, and the electrical device includes the battery provided by the above technical solution, and the battery is used to provide electrical energy.

[0020] The technical solutions provided by the embodiments of the present disclosure at least bring the following beneficial effects:

[0021] The present application provides a battery, which includes battery cells, a box body, and a protection plate. An electrode terminal is provided on one side of the battery cell along a first direction. The box body forms an accommodation space for accommodating the battery cell; the protection plate is disposed in the accommodation space and on one side of the battery cell along the first direction. The protection plate includes a main body part and a buffer part connected to each other. The buffer part protrudes from one side of the main body part facing the battery cell and faces the electrode terminal along the first direction. In the above structure, since the buffer part in the protection plate protrudes from one side of the main body part facing the battery cell and faces the electrode terminal along the first direction, when the protection plate is impacted and deformed, the buffer part can contact the electrode terminal of the battery cell with better strength, and the buffer part can buffer the force between the protection plate and the battery cell, so that the electrode terminal of the battery cell is not easily deformed, which is beneficial to improving the anti-impact performance of the battery, thereby improving the reliability of the battery.

[0022] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specific embodiments of the present application are specifically exemplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0024] Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0025] Figure 2 Partial structural split view of the battery provided by some embodiments of the present application;

[0026] Figure 3 Schematic structural view of a battery cell in the battery provided by some embodiments of the present application;

[0027] Figure 4 Schematic structural view of a protective plate in the battery provided by some embodiments of the present application;

[0028] Figure 5 Schematic structural view at the protective plate in the battery provided by some embodiments of the present application;

[0029] Figure 6 is Figure 5 The enlarged view of part A in

[0030] Figure 7 Cross-sectional view of the protective plate in the battery provided by some embodiments of the present application.

[0031] The reference numerals in the specific embodiments are as follows:

[0032] 10. Box body; 101. First box body; 102. Second box body; 103. Accommodating space; 20. Battery cell; 201. Electrode terminal; 202. Pressure relief mechanism; 30. Protective plate; 301. Main body part; 302. Buffer part; 3021. Convex part; 303. Reinforcing rib; 304. Glue-limiting boss; 305. Plate body; 3051. Connection area; 3052. Buffer area; 306. Buffer layer; 40. Bus bar; 50. Separator; 60. Pressure strip; 601. Glue-containing gap; 70. Reinforcing beam; 1000. Vehicle; 100. Battery; 200. Controller; 300. Motor; X. First direction; Y. Second direction; Z. Third direction. Specific embodiments

[0033] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and thus are only examples and should not be used to limit the protection scope of the present application.

[0034] 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 ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0035] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0036] In addition, technical terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely applied to electric transportation tools such as electric bicycles, electric motorcycles, electric vehicles, and many fields such as aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0040] 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.

[0041] With the continuous expansion of the application scope of batteries in various fields, people are paying more and more attention to the reliability of batteries. How to improve the reliability of batteries has become an important research direction for those skilled in the art.

[0042] As a device that provides electrical energy in an electrical device, the battery has characteristics such as high specific energy and high power density, which makes it prone to thermal runaway or even explosion when it is impacted and damaged.

[0043] In order to enhance the impact resistance of the battery and improve the reliability of the battery, some embodiments of the present application provide a battery, which includes battery cells, a box body and a protection plate. An electrode terminal is provided on one side of the battery cell along a first direction. The box body forms a receiving space for receiving the battery cell; the protection plate is disposed in the receiving space and on one side of the battery cell along the first direction. The protection plate includes a main body portion and a buffer portion connected to each other. The buffer portion protrudes from the side of the main body portion facing the battery cell and is opposite to the electrode terminal along the first direction. In the above structure, since the buffer portion in the protection plate protrudes from the side of the main body portion facing the battery cell and is opposite to the electrode terminal along the first direction, when the protection plate is impacted and deformed, the buffer portion can contact the electrode terminal of the battery cell with better strength, and the buffer portion can buffer the force between the protection plate and the battery cell, so that the electrode terminal of the battery cell is not easily deformed, which is beneficial to improving the impact resistance of the battery and thus improving the reliability of the battery.

[0044] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator and a planer, etc. The embodiments of the present application do not make special restrictions on the above electrical devices.

[0045] For the convenience of description in the following embodiments, a vehicle is taken as an example of an electrical device in an embodiment of the present application for illustration.

[0046] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of vehicle 1000 provided by some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery 100 is disposed inside vehicle 1000, and the battery 100 can be disposed at the bottom, head, or tail of vehicle 1000. The battery 100 can be used to supply power to vehicle 1000. For example, the battery 100 can serve as the operating power source of vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1000.

[0047] In some embodiments of the present application, the battery 100 can not only serve as the operating power source of vehicle 1000, but also serve as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0048] Some embodiments of the present application provide a battery 100, as Figure 2 shown, the battery 100 includes battery cells 20 (not shown in the figure), a box body 10, and a protection plate 30. An electrode terminal 201 is provided on one side of the battery cell 20 along the first direction X. The box body 10 forms an accommodation space 103 for accommodating the battery cells 20. The protection plate 30 is disposed in the accommodation space 103 and on one side of the battery cell 20 along the first direction X. The protection plate 30 includes a main body portion 301 and a buffer portion 302 connected to each other. The buffer portion 302 protrudes from the side of the main body portion 301 facing the battery cell 20 and is opposite to the electrode terminal 201 along the first direction X.

[0049] The battery cell 20 can be a secondary battery cell 20, which refers to a battery cell 20 that can be activated by charging after discharging to continue to be used. The battery cell 20 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium-metal battery cell, a sodium-metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0050] Exemplarily, the battery cell 20 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 20 of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal-prismatic battery cell, etc.

[0051] When the battery 100 includes a plurality of battery cells 20, the plurality of battery cells 20 are arranged and fixed to form a battery 100 module.

[0052] The electrode terminal 201 can be a component provided on the battery cell 20 for electrically connecting to components outside the battery cell 20, so that the battery cell 20 can be charged and discharged. The electrode terminal 201 can include, but is not limited to, a columnar structure, and those skilled in the art can set it according to the actual situation.

[0053] The electrode terminal 201 is provided on one side of the battery cell 20 in the first direction X, so that components outside the battery cell 20 can be arranged on one side of the battery cell 20 in the first direction X. Exemplarily, the electrode terminal 201 protrudes from the battery cell 20 along the first direction X, so that electrical devices or charging devices outside the battery cell 20 can be conveniently connected to the electrode terminal 201.

[0054] The box body 10 can be a component for providing an accommodation space 103, and the accommodation space 103 is used to accommodate components inside the battery 100 such as the battery cell 20, wire harness, circuit board, etc.

[0055] The protection plate 30 can be a plate-shaped component with protection ability, and is used to protect the battery 100. By arranging the protection plate 30 in the accommodation space 103 and making the protection plate 30 located between the box body 10 and the battery cell 20, the impact received by the box body 10 can be transmitted to the battery cell 20 only after passing through the protection plate 30. By arranging the protection plate 30 on one side of the battery cell 20 along the first direction X, the electrode terminal 201 and the protection plate 30 are located on the same side of the battery cell 20, which is convenient for the electrode terminal 201 to contact the protection plate 30. Among them, the first direction X can be the thickness direction of the protection plate 30.

[0056] The main body portion 301 can be the main structure of the protection plate 30, and it can extend along the extending direction of the side surface of the battery cell 20, so that the protection plate 30 can have a larger area located between the box body 10 and the battery cell 20, playing a better protection role.

[0057] The buffer portion 302 can be a structure provided on the protection plate 30 for buffering the impact force between the protection plate 30 and the battery cell 20. By protruding the buffer portion 302 from the side of the main body portion 301 facing the battery cell 20, the buffer portion 302 is closer to the battery cell 20 than the main body portion 301. When the battery 100 is in an impacted state, the buffer portion 302 can contact the battery cell 20 and buffer the force between the protection plate 30 and the battery cell 20; at the same time, the buffer portion 302 protruding from the side of the main body portion 301 facing the battery cell 20 also enables a gap to be formed between the battery cell 20 and the main body portion 301, which can provide a deformation space for the bottom plate.

[0058] Since the electrode terminal 201 of the battery cell 20 needs to be connected to external devices and usually has a relatively high structural strength, the buffer portion 302 is disposed opposite to the electrode terminal 201 along the first direction X, so that the buffer portion 302 can contact the electrode terminal 201 of the battery cell 20, and deformation is not likely to occur at the contact position (at the electrode terminal 201 of the battery cell 20).

[0059] In the above structure, since the buffer portion 302 in the protective plate 30 protrudes from the side of the main body portion 301 facing the battery cell 20 and is disposed opposite to the electrode terminal 201 along the first direction X, when the protective plate 30 is impacted and deformed, the buffer portion 302 can contact the electrode terminal 201 of the battery cell 20 with better strength, and the buffer portion 302 can buffer the acting force between the protective plate 30 and the battery cell 20, so that the electrode terminal 201 of the battery cell 20 is not easily deformed, which is beneficial to improving the impact resistance of the battery 100, thereby improving the reliability of the battery 100.

[0060] In some embodiments, the box body 10 may include a first box body 101 and a second box body 102, and the first box body 101 and the second box body 102 are covered with each other to define an accommodation space 103 for accommodating components such as the battery cell 20, wiring harness, circuit board, etc. The first box body 101 and the second box body 102 may be of various shapes, for example, a cuboid, a cylinder, etc. Exemplarily, the first box body 101 may be a hollow structure with one side open, and the second box body 102 may also be a hollow structure with one side open. The open side of the second box body 102 is covered with the open side of the first box body 101, then the box body 10 with the accommodation space 103 is formed.

[0061] In some embodiments, as Figure 3 shown, a pressure relief mechanism 202 is provided on one side of the battery cell 20 along the first direction X, and the pressure relief mechanism 202 is disposed opposite to the main body portion 301 along the first direction X.

[0062] The pressure relief mechanism 202 may be a mechanism provided on the battery cell 20 that can discharge the substances in the box body 10 to the outside of the box body 10, and can realize the reduction of the internal pressure of the box body 10 to reduce the possibility of the battery 100 exploding. The pressure relief mechanism 202 may include pressure relief components such as pressure relief nails and explosion-proof valves provided on the battery cell 20. In a state where the internal pressure of the battery cell 20 reaches or exceeds a preset value, the pressure relief component can be opened to communicate the inside and the outside of the battery cell 20 and discharge the discharged substances; the pressure relief mechanism 202 may also include a weak structure formed on the outer shell of the battery cell 20, and the structural strength of the weak structure is lower than that of the surrounding outer shell. In a state where the internal pressure of the battery cell 20 reaches or exceeds a preset value, the weak structure can be broken to communicate the inside and the outside of the battery cell 20 and discharge the discharged substances.

[0063] By arranging the pressure relief mechanism 202 on one side of the battery cell 20 along the first direction X and setting the pressure relief mechanism 202 opposite to the main body portion 301 along the first direction X, the pressure relief mechanism 202 can communicate the interior of the battery cell 20 with the gap between the battery cell 20 and the main body portion 301, facilitating the discharge of substances inside the battery cell 20.

[0064] In some embodiments, the protective plate 30 includes a plurality of buffer portions 302 arranged at intervals along the second direction Y, and the second direction Y is perpendicular to the first direction X; a pressure relief mechanism 202 is provided on one side of the battery cell 20 along the first direction X, and the pressure relief mechanism 202 corresponds to the gap between two adjacent buffer portions 302.

[0065] By providing a plurality of buffer portions 302 and arranging the plurality of buffer portions 302 at intervals along the second direction Y, gaps can be formed between the buffer portions 302. By arranging the pressure relief mechanism 202 on one side of the battery cell 20 along the first direction X and making the pressure relief mechanism 202 correspond to the gap between two adjacent buffer portions 302, the gap between two adjacent buffer portions 302 can provide an avoidance space for the pressure relief mechanism 202, facilitating the operation of the pressure relief mechanism 202.

[0066] The second direction Y is configured to be perpendicular to the first direction X, so that the plurality of buffer portions 302 can be arranged on the side surface of the protective plate 30 perpendicular to the first direction X, making it convenient to arrange the buffer portions 302. Exemplarily, the buffer portion 302 extends along the third direction Z, and the third direction Z can be the direction perpendicular to the second direction Y on the side surface perpendicular to the first direction X, so that the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs, facilitating the arrangement of structures such as the buffer portion 302 in the protective plate 30.

[0067] In some embodiments, as Figure 4 shown, the protective plate 30 is provided with a reinforcing rib 303, and the reinforcing rib 303 is connected to two adjacent buffer portions 302.

[0068] The reinforcing rib 303 can be a rib structure for strengthening the structural strength of the protective plate 30, and it can protrude from the surface of the protective plate 30. By arranging the reinforcing rib 303 in the gap between two adjacent buffer portions 302 and connecting it to two adjacent buffer portions 302, not only can the reinforcing rib 303 better strengthen the structure of the protective plate 30, but also the reinforcing rib 303 can make full use of the space between two adjacent buffer portions 302.

[0069] In some embodiments, as Figure 5 shown, the battery 100 further includes a bus bar 40, and at least a part of the bus bar 40 is located between the buffer portion 302 and the electrode terminal 201 and is connected to the electrode terminal 201.

[0070] The bus bar 40 can be a component for electrically connecting multiple battery cells 20. By connecting to the electrode terminals 201 of the multiple battery cells 20, the multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel manner, so that the multiple battery cells 20 can output electrical energy as a whole module. Exemplarily, the bus bar 40 can be a tab, and the surface of the tab contacts and connects to the electrode terminal 201, enabling the bus bar 40 to be firmly connected to the electrode terminal 201.

[0071] By disposing at least a part of the bus bar 40 between the buffer portion 302 and the electrode terminal 201, the buffer portion 302 can abut against the bus bar 40, enabling the bus bar 40 to improve the structural strength of the contact position between the buffer portion 302 and the battery cell 20, which is beneficial to reducing the deformation at the electrode terminal 201 when being impacted, beneficial to improving the impact resistance of the battery 100, and thus improving the reliability of the battery 100.

[0072] In some embodiments, the battery 100 further includes a separator plate 50. The separator plate 50 is located on the side of the protective plate 30 facing the battery cell 20 and separates the battery cell 20 from the protective plate 30; the bus bar 40 is fixed to the separator plate 50.

[0073] The separator plate 50 can be a component in the battery 100 for separating components such as wire harnesses and circuit boards from the battery cell 20. The separator plate 50 is disposed on the side of the protective plate 30 facing the battery cell 20, such that the separator plate 50 is located between the protective plate 30 and the battery cell 20. When the protective plate 30 is deformed by impact, the buffer portion 302 can abut against the separator plate 50, which can reduce the impact on the battery cell 20 and is beneficial to reducing the deformation of the battery cell 20.

[0074] By fixing the bus bar 40 to the separator plate 50, the separator plate 50 can support the bus bar 40, which is beneficial to improving the overall structural strength and contributing to improving the impact resistance of the battery 100.

[0075] Exemplarily, the housing of the battery cell 20 and the bus bar 40 are respectively connected to two sides of the separator plate 50, and the electrode terminal 201 passes through the separator plate 50 and connects to the bus bar 40. Along the first direction X, the battery cell 20, the separator plate 50, the bus bar 40, and the buffer portion 302 are arranged in sequence.

[0076] In some embodiments, as Figure 6 shown, the battery 100 further includes a pressing strip 60. The pressing strip 60 is connected between the protective plate 30 and the separator plate 50.

[0077] The caulking strip 60 can be a strip-shaped component extending along the third direction Z. By connecting the caulking strip 60 between the protection plate 30 and the isolation plate 50, the protection plate 30 can support and fix the isolation plate 50 through the caulking strip 60, so that the battery 100 forms an integral structure.

[0078] Exemplarily, the caulking strip 60 can be set as a hollow structure, which is beneficial to saving materials and contributing to the light weight of the battery 100. In some embodiments, the caulking strip 60 can be made of rubber, so that the caulking strip 60 has a certain elasticity and can buffer the impact force transmitted from the protection plate 30 to the isolation plate 50.

[0079] In some embodiments, the caulking strip 60 is bonded to the protection plate 30.

[0080] By connecting the caulking strip 60 to the protection plate 30 in a bonding manner, the caulking strip 60 can be conveniently connected to the protection plate 30, which is beneficial to improving the assembly efficiency of the battery 100 and the production efficiency.

[0081] Exemplarily, the caulking strip 60 is bonded to the protection plate 30 through an adhesive. After the adhesive cures, an adhesive layer can be formed between the protection plate 30 and the caulking strip 60, and the adhesive layer maintains the connection between the protection plate 30 and the caulking strip 60 through the adhesive force.

[0082] In some embodiments, at least one buffer portion 302 includes at least two convex portions 3021, the at least two convex portions 3021 are spaced apart, and the caulking strip 60 is located in the gap between two adjacent convex portions 3021 in the buffer portion 302.

[0083] By making at least one buffer portion 302 include at least two convex portions 3021 and making the at least two convex portions 3021 spaced apart, a gap is provided between two adjacent convex portions 3021 in at least one buffer portion 302. By arranging the caulking strip 60 in the gap between two adjacent convex portions 3021 in the buffer portion 302, the caulking strip 60 will not interfere with the reinforcing rib 303, which is convenient for arranging the caulking strip 60.

[0084] In some embodiments, a glue-limiting boss 304 protrudes from the surface of the protection plate 30 facing the isolation plate 50. The glue-limiting boss 304 is located between two adjacent convex portions 3021 in the buffer portion 302 and abuts against the caulking strip 60 so as to form a glue-containing gap 601 for accommodating the adhesive between the caulking strip 60 and the protection plate 30.

[0085] By providing a glue-limiting boss 304 protruding towards the isolation plate 50 between two adjacent convex portions 3021 in the buffer portion 302 of the protection plate 30, when the caulking strip 60 abuts against the glue-limiting boss 304, a glue-containing gap 601 for accommodating the adhesive can be formed between the caulking strip 60 and the protection plate 30, and the adhesive layer is formed in the glue-containing gap 601 and is formed by curing the adhesive in the glue-containing gap 601.

[0086] The height by which the glue-limiting boss 304 protrudes from the surface of the guard plate 30 can limit the thickness of the glue layer. Exemplarily, the height range by which the glue-limiting boss 304 protrudes from the surface of the guard plate 30 can be set to 0.2 mm to 1.1 mm, such that the thickness range of the glue layer is 0.2 mm to 1.1 mm, such that the glue layer not only has sufficient thickness to firmly bond the bead 60 and the guard plate 30, but also can reduce the waste of the bonding glue. In some embodiments, the height range by which the glue-limiting boss 304 protrudes from the surface of the guard plate 30 can be set to 0.3 mm to 1 mm, such that the thickness range of the glue layer is 0.3 mm to 1 mm. The height by which the glue-limiting boss 304 protrudes from the surface of the guard plate 30 can be 0.5 mm, 0.8 mm or 1 mm, such that the glue layer not only has sufficient thickness to firmly bond the bead 60 and the guard plate 30, but also can reduce the waste of the bonding glue.

[0087] Exemplarily, the glue-limiting boss 304 can be integrally formed with the guard plate 30 by means of a molding process, such that the forming of the glue-limiting boss 304 is convenient.

[0088] In some embodiments, the battery 100 further includes a reinforcing beam 70, and the reinforcing beam 70 is connected to the guard plate 30 and the box body 10.

[0089] The reinforcing beam 70 can be a beam body provided in the battery 100 for strengthening the structural strength of the battery 100. By disposing the reinforcing beam 70 in the accommodation space 103 and connecting the reinforcing beam 70 to the guard plate 30 and the box body 10, the overall strength of the battery 100 can be improved.

[0090] In some embodiments, as Figure 7 shown, the guard plate 30 includes two plate bodies 305 and a buffer layer 306 disposed between the two plate bodies 305. The buffer layer 306 is an elastic structural layer, and the plate body 305 is a composite material part; the plate body 305 includes a connection area 3051 and a buffer area 3052. The connection areas 3051 of the two plate bodies 305 are stacked and connected, and the buffer layer 306 is located between the buffer areas 3052 of the two plate bodies 305; the main body part 301 includes the connection areas 3051 of the two plate bodies 305, and the buffer part 302 includes the buffer areas 3052 of the two plate bodies 305 and the buffer layer 306.

[0091] The plate body 305 can be a plate-like structure of the guard plate 30 close to the side surface. By providing the plate bodies 305 on two side surfaces of the guard plate 30 close to the thickness direction of the guard plate 30 itself, not only can the overall structural strength of the guard plate 30 be improved, but also it is convenient to fill buffer materials between the two plate bodies 305, which is beneficial to improving the performance of the guard plate 30.

[0092] The plate body 305 being a composite material part may mean that the plate body 305 is made of a composite material. The composite material may be a material formed by using a thermosetting resin as a matrix and adding continuous fibers therein, so that the plate body 305 has good impact resistance, which is beneficial to improving the protection ability of the guard plate 30.

[0093] The buffer layer 306 may be a structural layer provided in the guard plate 30 for buffering impact force. By sandwiching the buffer layer 306 between two plate bodies 305, the buffer layer 306 can absorb the impact received by the plate body 305, which is beneficial to reducing the impact force transmitted by the guard plate 30 to external components such as the isolation plate 50 and the busbar 40.

[0094] The buffer layer 306 being an elastic structural layer may mean that the buffer layer 306 can undergo elastic deformation, so that the buffer layer 306 can absorb the impact force by means of elastic deformation. Exemplarily, the buffer layer 306 can be made of foam plastic, so that the buffer layer 306 is not only light in weight but also has good impact absorption ability; the buffer layer 306 can also be made of sponge, so that the buffer layer 306 has good elastic deformation ability and can absorb the impact force well.

[0095] The connection area 3051 and the buffer area 3052 respectively refer to different areas of the plate body 305, and the two are connected to form the overall structure of the plate body 305. Among them, the connection area 3051 is the area of the plate body 305 corresponding to the main body part 301 of the guard plate 30. The connection areas 3051 of the two plate bodies 305 in the guard plate 30 are stacked and connected in the thickness direction of the guard plate 30 to form the main body part 301 of the guard plate 30, so that the main body part 301 has strong structural strength. The buffer area 3052 is the area of the plate body 305 corresponding to the buffer part 302 of the guard plate 30. The buffer areas 3052 of the two plate bodies 305 in the guard plate 30 are stacked and spaced in the thickness direction of the guard plate 30, and the buffer layer 306 is sandwiched between them. The buffer layer 306 and the buffer areas 3052 of the two plate bodies 305 form the buffer part 302 of the guard plate 30, so that the buffer part 302 has good buffer ability.

[0096] In some embodiments, the two plate bodies 305 are an integrally formed structure.

[0097] The two plate bodies 305 can be integrally formed by a molding process, so that the guard plate 30 has good structural integrity, which is beneficial to improving the structural strength of the guard plate 30. During the forming process of the guard plate 30, the buffer layer 306 can be placed as an insert in the mold for forming the guard plate 30, so that the buffer layer 306 is directly formed between the two plate bodies 305, making the forming of the guard plate 30 convenient.

[0098] Some embodiments of the present application further provide an electrical device, which includes the battery 100 provided by the above technical solution, and the battery 100 is used to provide electrical energy.

[0099] The electrical device may be any of the foregoing devices or systems that apply the battery 100.

[0100] According to the battery 100 provided by some embodiments of the present application, the battery 100 includes battery cells 20, a box body 10, a protection plate 30, a bus bar 40, a separator 50, a pressing strip 60, and a reinforcing beam 70. The battery cells 20 are disposed in the accommodation space 103 formed by the box body 10. The battery cells 20, the separator 50, the bus bar 40, and the protection plate 30 are sequentially disposed in the accommodation space 103 along the first direction X. The reinforcing beam 70 is located in the accommodation space 103 and is connected to the box body 10 and the separator 50. The electrode terminals 201 of the battery cells 20 pass through the separator 50 and are connected to the bus bar 40. The bus bar 40 and the housings of the battery cells 20 are respectively connected to both sides of the separator 50 in the first direction X. The protection plate 30 includes a main body portion 301 and a buffer portion 302 that are connected to each other. The buffer portion 302 protrudes from the side of the main body portion 301 facing the separator 50 and faces the bus bar 40 along the first direction X. The protection plate 30 includes two plate bodies 305 and a buffer layer 306 disposed between the two plate bodies 305. The connection regions 3051 in the two plate bodies 305 are stacked and connected to form the main body portion 301. The buffer regions 3052 in the two plate bodies 305 sandwich the buffer layer 306 to form the buffer portion 302. The buffer portion 302 includes at least two convex portions 3021 that are spaced apart. The pressing strip 60 is disposed in the gap between two adjacent convex portions 3021 in the buffer portion 302 and is connected to the separator 50 and the protection plate 30.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A battery cell, with an electrode terminal provided on one side along a first direction; A box body, formed with a receiving space for receiving the battery cell; A protective plate is arranged in the accommodating space and located on one side of the battery cell along the first direction. The protective plate includes a main body and a buffer part which are connected to each other. The buffer part protrudes from the side of the main body facing the battery cell and is opposite to the electrode terminal along the first direction.

2. The battery according to claim 1, characterized in that A pressure relief mechanism is provided on one side of the battery cell along the first direction, and the pressure relief mechanism is opposite to the main body along the first direction.

3. The battery according to claim 1, characterized in that The guard plate includes a plurality of buffer portions spaced apart along a second direction, the second direction being perpendicular to the first direction; A pressure relief mechanism is provided on one side of the battery cell along the first direction, and the pressure relief mechanism corresponds to a gap between two adjacent buffer parts.

4. The battery according to claim 1, characterized in that The guard plate is provided with reinforcing ribs, and the reinforcing ribs are connected to two adjacent buffer parts.

5. The battery according to claim 1, characterized in that The battery further includes a current busbar, at least a portion of which is located between the buffer portion and the electrode terminal and connected to the electrode terminal.

6. The battery according to claim 5, characterized in that The battery further comprises an isolating plate, which is located on a side of the guard plate facing the battery cell and separates the battery cell from the guard plate; The current collector is fixed to the isolation plate.

7. The battery according to claim 6, characterized in that The battery further includes a pressure strip connected between the guard plate and the isolation plate.

8. The battery according to claim 7, characterized in that The pressure strip is bonded to the guard plate.

9. The battery according to claim 7, characterized in that At least one of the buffering parts comprises at least two convex parts, the at least two convex parts are arranged at intervals, and the pressure strip is located in the gap between two adjacent convex parts in the buffering part.

10. The battery according to claim 9, characterized in that The surface of the guard plate facing the isolation plate is provided with a glue limiting boss, which is located between two adjacent bosses in the buffer portion and abuts against the pressure strip to form a glue-containing gap for accommodating the adhesive between the pressure strip and the guard plate.

11. The battery according to claim 1, characterized in that The battery further comprises a reinforcing beam connected to the guard plate and the box body.

12. The battery according to claim 1, characterized in that The guard plate comprises two plate bodies and a buffer layer arranged between the two plate bodies, the buffer layer is an elastic structural layer, and the plate body is a composite material member; The plate body comprises a connection area and a buffer area, the connection areas of two plate bodies are stacked and connected, and the buffer layer is located between the buffer areas of the two plate bodies; The main body portion includes the connection area of ​​the two plate bodies, and the buffer portion includes the buffer area of ​​the two plate bodies and the buffer layer.

13. The battery according to claim 12, characterized in that The two plates are an integrally formed structure.

14. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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