Battery and electric device

Abstract

A battery (100) and an electric device. The battery (100) comprises a battery cell (20), a box (10) and a protective plate (30), wherein an electrode terminal (201) is provided on one side of the battery cell (20) in a first direction (X); the box (10) is provided with an accommodating space (103) for accommodating the battery cell (20); and the protective plate (30) is arranged in the accommodating space (103) and is located on one side of the battery cell (20) in the first direction (X), and the protective plate (30) comprises a main body portion (301) and a cushioning portion (302), which are connected to each other, the cushioning portion (302) protruding from the side of the main body portion (301) facing the battery cell (20) and being opposite the electrode terminal (201) in the first direction (X). In the above structure, the cushioning portion (302) of the protective plate (30) protrudes from the side of the main body portion (301) facing the battery cell (20) and is opposite the electrode terminal (201) in the first direction (X), so that when the protective plate (30) is impacted and deforms, the cushioning portion (302) can come into contact with the electrode terminal (201) of the battery cell (20) having a good strength, and the cushioning portion (302) can cushion the action forces between the protective plate (30) and the battery cell (20), causing the electrode terminal (201) of the battery cell (20) to be less prone to deforming, and thereby facilitating an improvement in the impact resistance of the battery (100), as well as improving the reliability of the battery (100).

Description

Batteries and electrical devices CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202420286218.7, filed on February 6, 2024, entitled “Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0003] Batteries have the advantages of high specific energy and high power density. They are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, and electric tools.

[0004] As the application scope of batteries continues to expand in various fields, the reliability of batteries has attracted more and more attention from technicians in this field. Summary of the Invention

[0005] In view of the above problems, the present application provides a battery and an electrical device, wherein the battery has good impact resistance and is conducive to improving the reliability of the battery.

[0006] In the first aspect, some embodiments of the present application provide a battery, which includes a battery cell, a case and a protective plate, wherein the battery cell is provided with an electrode terminal on one side along a first direction; the case is formed with a accommodating space for accommodating the battery cell; the protective plate is arranged in the accommodating space and is located on one side of the battery cell along the first direction, the protective plate includes a main body and a buffer portion that are interconnected, the buffer portion protruding from the side of the main body facing the battery cell and opposite to the electrode terminal along the first direction.

[0007] In the above structure, since the buffer portion in the protective plate protrudes from the side of the main body facing the battery cell and is opposite to the electrode terminal along the first direction, when the protective plate is deformed by impact, 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 protective plate and the battery cell, making it difficult for the electrode terminal of the battery cell to deform, which is beneficial to improving the impact resistance of the battery and thus improving the reliability of the battery.

[0008] According to the battery provided in some embodiments of the present application, 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, so that the pressure relief mechanism can connect the interior of the battery cell with the gap between the battery cell and the main body, thereby facilitating the discharge of substances inside the battery cell.

[0009] According to the battery provided in some embodiments of the present application, the protective plate includes a plurality of buffer portions spaced apart along a second direction, where 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 the two adjacent buffer portions can provide avoidance space for the pressure relief mechanism, thereby facilitating the operation of the pressure relief mechanism.

[0010] According to the battery provided in some embodiments of the present application, the guard plate is provided with a reinforcing rib, which is connected to two adjacent buffer parts. This not only enables the reinforcing rib to better reinforce the structure of the guard plate, but also enables the reinforcing rib to fully utilize the space between the two adjacent buffer parts.

[0011] According to the battery provided in some embodiments of the present application, the battery also includes a busbar, at least a portion of which is located between the buffer portion and the electrode terminal and connected to the electrode terminal, so that the buffer portion can offset the busbar, so that the busbar can improve the structural strength of the contact position between the buffer portion and the battery cell, which is beneficial to reducing the deformation at the electrode terminal when impacted, and is beneficial to improving the impact resistance of the battery, thereby improving the reliability of the battery.

[0012] According to the battery provided in some embodiments of the present application, the battery also includes an isolation plate, which is located on the side of the protective plate facing the battery cell and separates the battery cell and the protective plate; the busbar is fixed to the isolation plate, so that when the protective plate is deformed by impact, the buffer portion can be against the isolation plate, which can reduce the impact on the battery cell and help reduce the deformation of the battery cell.

[0013] According to the battery provided in some embodiments of the present application, the battery further includes a pressure strip connected between the protective plate and the isolation plate, so that the protective plate can support and fix the isolation plate through the pressure strip, so that the battery forms an integral structure.

[0014] According to the battery provided in some embodiments of the present application, the pressure strip is adhered to the protective plate, so that the pressure strip can be conveniently connected to the protective plate, which is beneficial to improving the assembly efficiency of the battery and improving production efficiency.

[0015] According to the battery provided in some embodiments of the present application, at least one buffer portion includes at least two protrusions, and the at least two protrusions are arranged at intervals. The pressure strip is located in the gap between two adjacent protrusions in the buffer portion, so that the pressure strip does not interfere with the reinforcing rib, thereby facilitating the arrangement of the pressure strip.

[0016] According to the battery provided in some embodiments of the present application, a glue-limiting boss is provided on the surface of the protective plate facing the isolation plate. The glue-limiting boss is located between two adjacent bosses in the buffer portion and abuts against the pressure strip to form a glue-containing gap between the pressure strip and the protective plate to accommodate the adhesive glue, so that the adhesive glue has sufficient thickness to firmly bond the pressure strip and the protective plate.

[0017] According to the battery provided in some embodiments of the present application, the battery further includes a reinforcing beam, which is connected to the guard plate and the box body, so that the overall strength of the battery can be improved.

[0018] According to the battery provided in some embodiments of the present application, the protective plate includes 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 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 includes the connection area of ​​the two plate bodies, and the buffer portion includes the buffer areas of the two plate bodies and the buffer layer.

[0019] According to the battery provided in some embodiments of the present application, the two plates are integrally formed, so that the structural integrity of the guard plate is good, which is conducive to improving the structural strength of the guard plate.

[0020] In a second aspect, some embodiments of the present application provide an electrical device, which includes a battery provided by the above technical solution, and the battery is used to provide electrical energy.

[0021] The technical solutions provided by the embodiments of the present disclosure bring at least the following beneficial effects:

[0022] The present application provides a battery comprising a battery cell, a housing, and a protective plate. The battery cell is provided with an electrode terminal on one side thereof along a first direction. The housing is formed with a storage space for accommodating the battery cell. The protective plate is disposed in the storage space and is located on one side of the battery cell along the first direction. The protective plate comprises a main body portion and a buffer portion, which are interconnected. 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, because the buffer portion of the protective 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 protective plate is deformed by an impact, the buffer portion can contact the electrode terminal of the battery cell with greater strength. The buffer portion can also buffer the force between the protective plate and the battery cell, making the electrode terminal of the battery cell less susceptible to deformation. This improves the impact resistance of the battery and thereby enhances the reliability of the battery.

[0023] 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

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0025] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0026] FIG2 is a partial structural exploded view of a battery provided in some embodiments of the present application;

[0027] FIG3 is a schematic structural diagram of a battery cell in a battery provided in some embodiments of the present application;

[0028] FIG4 is a schematic structural diagram of a protective plate in a battery provided in some embodiments of the present application;

[0029] FIG5 is a schematic structural diagram of a protective plate in a battery provided by some embodiments of the present application;

[0030] Figure 6 is an enlarged view of point A in Figure 5;

[0031] FIG7 is a cross-sectional view of a protective plate in a battery provided by some embodiments of the present application.

[0032] The accompanying drawings in the specific implementation manner are as follows:

[0033] 10. Box body; 101. First box body; 102. Second box body; 103. Accommodation space; 20. Battery cell; 201. Electrode terminal; 202. Pressure relief mechanism; 30. Guard plate; 301. Main body; 302. Buffering part; 3021. Protrusion; 303. Reinforcing rib; 304. Glue-limiting boss; 305. Plate body; 3051. Connection area; 3052. Buffer zone; 306. Buffer layer; 40. Busbar; 50. Isolation plate; 60. Pressing 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. DETAILED DESCRIPTION

[0034] The following 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 more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0037] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As battery applications continue to expand, market demand is also growing.

[0041] 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.

[0042] As the application scope of batteries continues to expand 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.

[0043] As a device that provides electrical energy in electrical devices, batteries have the characteristics of high specific energy and high power density, which makes them prone to thermal runaway and even explosion when impacted and damaged.

[0044] To enhance the impact resistance and improve the reliability of a battery, some embodiments of the present application provide a battery comprising a battery cell, a housing, and a protective plate. The battery cell is provided with an electrode terminal on one side along a first direction, and the housing forms a storage space for accommodating the battery cell. The protective plate is disposed in the storage space and is located on one side of the battery cell along the first direction. The protective plate comprises a main body portion and a buffer portion that are interconnected. 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, because the buffer portion of the protective 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 protective plate is deformed by an impact, the buffer portion can contact the electrode terminal of the battery cell with greater strength. The buffer portion can also buffer the force between the protective plate and the battery cell, making the electrode terminal of the battery cell less susceptible to deformation, which is beneficial for improving the impact resistance of the battery and thereby improving the reliability of the battery.

[0045] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0046] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0047] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The 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 or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0048] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0049] Some embodiments of the present application provide a battery 100, as shown in Figure 2, the battery 100 includes a battery cell 20 (not shown in the figure), a box body 10 and a protective plate 30, the battery cell 20 is provided with an electrode terminal 201 on one side along the first direction X, and the box body 10 is formed with a accommodating space 103 for accommodating the battery cell 20; the protective plate 30 is arranged in the accommodating space 103 and is located on one side of the battery cell 20 along the first direction X, the protective plate 30 includes a main body 301 and a buffer portion 302 that are interconnected, the buffer portion 302 protrudes from the side of the main body 301 facing the battery cell 20 and is opposite to the electrode terminal 201 along the first direction X.

[0050] The battery cell 20 may be a secondary battery cell 20. A secondary battery cell 20 refers to a battery cell 20 that can be recharged to activate the active material after discharge and continue to be used. The battery cell 20 may 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, or the like.

[0051] Exemplarily, the battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell 20 of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal battery cells. Polygonal battery cells are, for example, hexagonal battery cells.

[0052] 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.

[0053] The electrode terminal 201 may be a component provided on the battery cell 20 for electrically connecting to components outside the battery cell 20 to facilitate charging and discharging of the battery cell 20. The electrode terminal 201 may include but is not limited to a columnar structure, and those skilled in the art may configure it according to actual conditions.

[0054] The electrode terminal 201 is disposed on one side of the battery cell 20 in the first direction X, so that components external to 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 an electrical device or charging device external to the battery cell 20 can be conveniently connected to the electrode terminal 201 .

[0055] The box body 10 may be a component for providing an accommodation space 103 for accommodating components located inside the battery 100 , such as the battery cells 20 , a wiring harness, and a circuit board.

[0056] The protective plate 30 can be a plate-shaped component with protective capabilities, used to protect the battery 100. By placing the protective plate 30 in the accommodating space 103 and between the housing 10 and the battery cell 20, any impact on the housing 10 is transmitted to the battery cell 20 only after passing through the protective plate 30. By placing the protective plate 30 on one side of the battery cell 20 along the first direction X, the electrode terminal 201 and the protective plate 30 are located on the same side of the battery cell 20, facilitating contact between the electrode terminal 201 and the protective plate 30. The first direction X can be the thickness direction of the protective plate 30.

[0057] The main body 301 may be the main structure of the guard plate 30 , which may extend along the extension direction of the side surface of the battery cell 20 so that the guard plate 30 may have a larger area to be located between the box body 10 and the battery cell 20 , thereby providing better protection.

[0058] The buffer portion 302 may be a structure provided on the protective plate 30 for buffering the impact force between the protective plate 30 and the battery cell 20. By protruding the buffer portion 302 from the side of the main body 301 facing the battery cell 20, the buffer portion 302 is closer to the battery cell 20 than the main body 301. This allows the buffer portion 302 to contact the battery cell 20 and buffer the force between the protective plate 30 and the battery cell 20 when the battery 100 is subjected to an impact. At the same time, the protrusion of the buffer portion 302 from the side of the main body 301 facing the battery cell 20 also creates a gap between the battery cell 20 and the main body 301, providing space for the bottom plate to deform.

[0059] Since the electrode terminal 201 of the battery cell 20 needs to be connected to an external device, it usually has a high structural strength. The buffer portion 302 is arranged relative 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, making it difficult for deformation to occur at the contact position (at the electrode terminal 201 of the battery cell 20).

[0060] In the above structure, since the buffer portion 302 in the protective plate 30 protrudes from the side of the main body 301 facing the battery cell 20 and is opposite to the electrode terminal 201 along the first direction X, when the protective plate 30 is deformed by impact, 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 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 and thus improving the reliability of the battery 100.

[0061] In some embodiments, the housing 10 may include a first housing 101 and a second housing 102, which cover each other to define a storage space 103 for accommodating components such as battery cells 20, wiring harnesses, and circuit boards. The first housing 101 and the second housing 102 may have various shapes, such as a rectangular parallelepiped, a cylinder, etc. For example, the first housing 101 may be a hollow structure with one side open, and the second housing 102 may also be a hollow structure with one side open. The open side of the second housing 102 covers the open side of the first housing 101, thereby forming the housing 10 having the storage space 103.

[0062] In some embodiments, as shown in FIG. 3 , a pressure relief mechanism 202 is provided on one side of the battery cell 20 along the first direction X. The pressure relief mechanism 202 is opposite to the main body 301 along the first direction X.

[0063] The pressure relief mechanism 202 may be a mechanism provided on the battery cell 20 that enables the discharge of substances within the housing 10 to the outside of the housing 10, thereby reducing the internal pressure of the housing 10 and reducing the possibility of explosion of the battery 100. The pressure relief mechanism 202 may include pressure relief components such as pressure relief pins and explosion-proof valves provided on the battery cell 20. When the pressure inside the battery cell 20 reaches or exceeds a preset value, the pressure relief components may open to connect the interior of the battery cell 20 with the exterior of the battery cell 20, thereby discharging the discharged substances. The pressure relief mechanism 202 may also include a weakened structure formed on the outer shell of the battery cell 20, the structural strength of the weakened structure being lower than the structural strength of the surrounding outer shell. When the pressure inside the battery cell 20 reaches or exceeds a preset value, the weakened structure may rupture to connect the interior of the battery cell 20 with the exterior of the battery cell 20, thereby discharging the discharged substances.

[0064] By arranging the pressure relief mechanism 202 on one side of the battery cell 20 along the first direction X and arranging the pressure relief mechanism 202 opposite to the main body 301 along the first direction X, the pressure relief mechanism 202 can connect the interior of the battery cell 20 with the gap between the battery cell 20 and the main body 301, thereby facilitating the discharge of substances inside the battery cell 20.

[0065] In some embodiments, the protective plate 30 includes a plurality of buffer portions 302 spaced apart along a second direction Y, where 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 .

[0066] By providing multiple buffer portions 302 and spacing the buffer portions 302 in 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 aligning the pressure relief mechanism 202 with the gap between two adjacent buffer portions 302, the gap between two adjacent buffer portions 302 provides space for the pressure relief mechanism 202 to escape, facilitating its operation.

[0067] The second direction Y is configured to be perpendicular to the first direction X, allowing multiple buffers 302 to be disposed on the side of the guard plate 30 perpendicular to the first direction X, thereby facilitating the arrangement of the buffers 302. For example, the buffers 302 extend along a third direction Z, which can be a direction perpendicular to the second direction Y on the side perpendicular to the first direction X. This allows the first direction X, the second direction Y, and the third direction Z to be mutually perpendicular, facilitating the arrangement of structures such as the buffers 302 in the guard plate 30.

[0068] In some embodiments, as shown in FIG. 4 , the guard plate 30 is provided with a reinforcing rib 303 , and the reinforcing rib 303 is connected to two adjacent buffer portions 302 .

[0069] The reinforcing rib 303 may be a convex rib structure for reinforcing the structural strength of the guard plate 30, and may protrude from the surface of the guard plate 30. By arranging the reinforcing rib 303 in the gap between two adjacent buffer portions 302 and connecting the reinforcing rib 303 to the two adjacent buffer portions 302, the reinforcing rib 303 not only better reinforces the structure of the guard plate 30 but also fully utilizes the space between the two adjacent buffer portions 302.

[0070] In some embodiments, as shown in FIG. 5 , the battery 100 further includes a current bus 40 , at least a portion of which is located between the buffer portion 302 and the electrode terminal 201 and connected to the electrode terminal 201 .

[0071] The busbar 40 is a component used to electrically connect multiple battery cells 20. By connecting to the electrode terminals 201 of the multiple battery cells 20, the busbar 40 allows the multiple battery cells 20 to be connected in series, parallel, or in a mixed manner, so that the multiple battery cells 20 function as a single module and output electrical energy. For example, the busbar 40 may be a tab, the surface of which contacts and connects to the electrode terminals 201, ensuring a secure connection between the busbar 40 and the electrode terminals 201.

[0072] By arranging at least a portion of the busbar 40 between the buffer portion 302 and the electrode terminal 201, the buffer portion 302 can be offset against the busbar 40, so that the busbar 40 can 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 of the electrode terminal 201 when impacted, and is beneficial to improving the impact resistance of the battery 100, thereby improving the reliability of the battery 100.

[0073] In some embodiments, the battery 100 further includes an isolation plate 50 . The isolation plate 50 is located on a side of the protective plate 30 facing the battery cell 20 and separates the battery cell 20 from the protective plate 30 . The busbar 40 is fixed to the isolation plate 50 .

[0074] The isolation plate 50 may be a component of the battery 100 used to separate components such as wiring harnesses and circuit boards from the battery cells 20. The isolation plate 50 is disposed on the side of the protective plate 30 facing the battery cells 20, so that the isolation plate 50 is located between the protective plate 30 and the battery cells 20. When the protective plate 30 is deformed by an impact, the buffer portion 302 can abut against the isolation plate 50, thereby reducing the impact on the battery cells 20 and facilitating deformation of the battery cells 20.

[0075] By fixing the current collector 40 to the isolation plate 50 , the isolation plate 50 can support the current collector 40 , which is beneficial to improving the overall structural strength and helping to improve the impact resistance of the battery 100 .

[0076] Illustratively, the shell of the battery cell 20 and the busbar 40 are respectively connected to the two sides of the isolation plate 50, and the electrode terminal 201 passes through the isolation plate 50 and is connected to the busbar 40. Along the first direction X, the battery cell 20, the isolation plate 50, the busbar 40 and the buffer part 302 are arranged in sequence.

[0077] In some embodiments, as shown in FIG. 6 , the battery 100 further includes a pressure strip 60 , which is connected between the guard plate 30 and the isolation plate 50 .

[0078] The pressure strip 60 can be a long strip component extending along the third direction Z. By connecting the pressure strip 60 between the guard plate 30 and the isolation plate 50, the guard plate 30 can support and fix the isolation plate 50 through the pressure strip 60, so that the battery 100 forms an integral structure.

[0079] For example, the bead 60 can be configured as a hollow structure, which is beneficial for saving materials and contributing to the lightweighting of the battery 100. In some embodiments, the bead 60 can be made of rubber, so that the bead 60 has a certain elasticity and can buffer the impact force transmitted from the guard plate 30 to the isolation plate 50.

[0080] In some embodiments, the bead 60 is bonded to the guard plate 30 .

[0081] The holding strip 60 is connected to the guard plate 30 by bonding, so that the holding strip 60 can be conveniently connected to the guard plate 30 , which is beneficial to improving the assembly efficiency of the battery 100 and improving production efficiency.

[0082] Exemplarily, the bead 60 is bonded to the guard plate 30 by adhesive. After the adhesive is cured, an adhesive layer can be formed between the guard plate 30 and the bead 60 . The adhesive layer maintains the connection between the guard plate 30 and the bead 60 through adhesive force.

[0083] In some embodiments, at least one buffer portion 302 includes at least two convex portions 3021 , and the at least two convex portions 3021 are spaced apart. The pressing strip 60 is located in the gap between two adjacent convex portions 3021 in the buffer portion 302 .

[0084] By having at least one buffer portion 302 include at least two protrusions 3021, and by having at least two protrusions 3021 spaced apart, a gap is provided in at least one buffer portion 302 between two adjacent protrusions 3021. By arranging the bead 60 in the gap between two adjacent protrusions 3021 in the buffer portion 302, the bead 60 does not interfere with the reinforcing rib 303, thereby facilitating the placement of the bead 60.

[0085] In some embodiments, a glue-limiting boss 304 is protruded from the surface of the guard plate 30 facing the isolation plate 50. The glue-limiting boss 304 is located between two adjacent bosses 3021 in the buffer portion 302 and abuts against the pressure strip 60 to form a glue-containing gap 601 between the pressure strip 60 and the guard plate 30 for accommodating the adhesive.

[0086] By setting a glue-limiting boss 304 protruding toward the isolation plate 50 between two adjacent protrusions 3021 in the buffer portion 302 of the protective plate 30, the molding 60 is pressed against the glue-limiting boss 304 to form a glue-containing gap 601 for accommodating the adhesive glue between the molding 60 and the protective plate 30, and the glue layer is formed in the glue-containing gap 601 and is formed by the curing of the adhesive glue in the glue-containing gap 601.

[0087] The height of the adhesive limiting boss 304 protruding from the surface of the guard plate 30 can limit the thickness of the adhesive layer. For example, the height of the adhesive limiting boss 304 protruding from the surface of the guard plate 30 can be set to a range of 0.2 mm to 1.1 mm, so that the thickness of the adhesive layer ranges from 0.2 mm to 1.1 mm, so that the adhesive layer has sufficient thickness to firmly bond the bead 60 and the guard plate 30 while reducing the waste of adhesive. In some embodiments, the height of the adhesive limiting boss 304 protruding from the surface of the guard plate 30 can be set to a range of 0.3 mm to 1 mm, so that the thickness of the adhesive layer ranges from 0.3 mm to 1 mm. The height of the adhesive limiting boss 304 protruding from the surface of the guard plate 30 can be 0.5 mm, 0.8 mm, or 1 mm, so that the adhesive layer has sufficient thickness to firmly bond the bead 60 and the guard plate 30 while reducing the waste of adhesive.

[0088] For example, the glue limiting boss 304 can be formed integrally with the guard plate 30 by using a compression molding process, so that the glue limiting boss 304 can be easily molded.

[0089] In some embodiments, the battery 100 further includes a reinforcement beam 70 , which is connected to the guard plate 30 and the box body 10 .

[0090] The reinforcement beam 70 may be a beam body provided in the battery 100 for reinforcing the structural strength of the battery 100. By providing the reinforcement beam 70 in the accommodation space 103 and connecting the reinforcement beam 70 to the guard plate 30 and the box body 10, the overall strength of the battery 100 can be improved.

[0091] In some embodiments, as shown in Figure 7, the guard plate 30 includes two plate bodies 305 and a buffer layer 306 arranged 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 zone 3052, the connection area 3051 of the two plate bodies 305 are stacked and connected, and the buffer layer 306 is located between the buffer zones 3052 of the two plate bodies 305; the main body 301 includes the connection area 3051 of the two plate bodies 305, and the buffer part 302 includes the buffer zones 3052 of the two plate bodies 305 and the buffer layer 306.

[0092] The plate body 305 can be a plate-like structure near the side of the guard plate 30. By setting the plate body 305 on the two sides near the thickness direction of the guard plate 30 itself, the overall structural strength of the guard plate 30 can be improved, and the guard plate 30 can also be filled with buffer material between the two plate bodies 305, which is conducive to improving the performance of the guard plate 30.

[0093] The plate body 305 is a composite material part, which may mean that the plate body 305 is made of composite material. The composite material can be a material with a thermosetting resin as a matrix and continuous fibers added therein, so that the plate body 305 has good impact resistance, which is beneficial to improving the protective ability of the guard plate 30.

[0094] The buffer layer 306 can be a structural layer provided in the guard plate 30 for buffering impact forces. By sandwiching the buffer layer 306 between the two plates 305, the buffer layer 306 can absorb the impact on the plates 305, thereby reducing the impact force transmitted from the guard plate 300 to external components such as the isolation plate 50 and the manifold 40.

[0095] The buffer layer 306 being an elastic structural layer may mean that the buffer layer 306 is elastically deformable, allowing the buffer layer 306 to absorb impact force through elastic deformation. For example, the buffer layer 306 may be made of foam plastic, making the buffer layer 306 not only lightweight but also having good impact absorption capabilities. The buffer layer 306 may also be made of sponge, which has good elastic deformation capabilities and can effectively absorb impact force.

[0096] The connection area 3051 and the buffer area 3052 refer to different regions of the plate body 305, which are interconnected to form the overall structure of the plate body 305. The connection area 3051 corresponds to the main body 301 of the guard plate 30. The connection areas 3051 of the two plates 305 of the guard plate 30 are stacked and connected in the thickness direction of the guard plate 30, forming the main body 301 of the guard plate 30, thus providing strong structural strength to the main body 301. The buffer areas 3052 correspond to the buffer areas 302 of the guard plate 30. The buffer areas 3052 of the two plates 305 of the guard plate 30 are stacked and spaced apart in the thickness direction of the guard plate 30, with a buffer layer 306 sandwiched between them. The buffer layer 306 and the buffer areas 3052 of the two plates 305 form the buffer area 302 of the guard plate 30, providing excellent cushioning capabilities.

[0097] In some embodiments, the two plates 305 are an integrally formed structure.

[0098] The two plates 305 can be integrally formed using a compression molding process, which improves the structural integrity of the guard plate 30 and helps to improve the structural strength of the guard plate 30. During the molding process of the guard plate 30, the buffer layer 306 can be placed as an insert in the mold forming the guard plate 30, so that the buffer layer 306 is directly molded between the two plates 305, making the molding of the guard plate 30 easier.

[0099] Some embodiments of the present application also provide an electric device, which includes the battery 100 provided by the above technical solution, and the battery 100 is used to provide electric energy.

[0100] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0101] According to some embodiments of the present application, a battery 100 is provided, which includes a battery cell 20, a housing 10, a protective plate 30, a current bus 40, a separator 50, a pressure strip 60, and a reinforcing beam 70. The battery cell 20 is disposed in a receiving space 103 formed by the housing 10. The battery cell 20, the separator 50, the current bus 40, and the protective plate 30 are sequentially arranged in the receiving space 103 along a first direction X. The reinforcing beam 70 is located in the receiving space 103 and connected to the housing 10 and the separator 50. The electrode terminals 201 of the battery cell 20 pass through the separator 50 and are connected to the current bus 40. The current bus 40 and the housing of the battery cell 20 are respectively connected to both sides of the separator 50 in the first direction X. The protective plate 30 includes a main body 301 and a buffer 302 that are connected to each other. The buffer 302 protrudes from the side of the main body 301 facing the separator 50 and is opposite to the current bus 40 in the first direction X. The protective plate 30 includes two plate bodies 305 and a buffer layer 306 arranged between the two plate bodies 305. The connection areas 3051 in the two plate bodies 305 are stacked and connected to form the main body 301. The buffer zones 3052 in the two plate bodies 305 are sandwiched with the buffer layer 306 to form a buffer portion 302. The buffer portion 302 includes at least two spaced-apart protrusions 3021. The pressure strip 60 is arranged in the gap between two adjacent protrusions 3021 in the buffer portion 302 and is connected to the isolation plate 50 and the protective plate 30.

[0102] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 comprising: A battery cell, having an electrode terminal provided on one side along a first direction; A box body is formed with a receiving space for receiving the battery cell; A protective plate is arranged in the accommodating space and is located on one side of the battery cell along the first direction. The protective plate includes a main body and a buffer part that 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, wherein 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 or 2, wherein 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 portions.

4. The battery according to any one of claims 1 to 3, wherein: The guard plate is provided with a reinforcing rib, and the reinforcing rib is connected to two adjacent buffer parts.

5. The battery according to any one of claims 1 to 4, wherein The battery further includes a current bus bar, 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, wherein The battery further includes an isolation 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, wherein The battery further includes a pressure strip connected between the guard plate and the isolation plate.

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

9. The battery according to claim 7 or 8, wherein At least one of the buffering parts includes at least two convex parts, and the at least two convex parts are arranged at intervals. The pressure strip is located in the gap between two adjacent convex parts in the buffering part.

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

11. The battery according to any one of claims 1 to 10, wherein: The battery further includes a reinforcing beam connected to the guard plate and the box body.

12. The battery according to any one of claims 1 to 11, wherein: The guard plate includes two plate bodies and a buffer layer arranged between the two plate bodies, the buffer layer is an elastic structural layer, and the plate bodies are composite materials; The plate body includes 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, wherein The two plates are an integrally formed structure.

14. An electrical device comprising the battery according to any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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