Battery cell, battery and electrical apparatus

Abstract

A battery cell (20), the battery cell (20) comprising: a casing (22), the casing (22) comprising a bottom wall (221), a top plate (223) and a plurality of side walls (222), the side walls (222) being connected to the top plate (223) and the bottom wall (221), and the bottom wall (221), the plurality of side walls (222) and the top plate (223) forming an accommodation space; a battery core (21), provided in the accommodation space; and supporting plates (23), arranged in the accommodation space and clamped between the side walls (222) and the battery core (21).

Description

Battery cells, batteries and electrical devices

[0001] This application claims priority to Chinese Patent Application No. 2023224908323, filed on September 13, 2023, entitled “Battery Cell, Battery and Electric Device,” the entire contents of which are incorporated herein by reference.

Technical field

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

[0003] Batteries, as the core power supply for electrical devices, have a significant impact on their reliability and safety. When impact strikes a device, the battery can easily deform, even damaging the internal cells, impacting the user's safety. Therefore, improving the safety and reliability of battery cells is an urgent issue.

[0004] [Summary of the invention]

[0005] In a first aspect, the present application provides a battery cell. The battery cell comprises a housing comprising a bottom wall, a top plate, and a plurality of side walls, the plurality of side walls connecting the top plate and the bottom wall, the bottom wall, the plurality of side walls, and the top plate forming a receiving space; a battery cell disposed in the receiving space; and a support plate disposed in the receiving space and clamped between the side walls and the battery cell.

[0006] In the above manner, the battery cell, the support plate and the shell form a whole. The support plate can support the battery cell and limit the movement of the battery cell in the shell, thereby reducing the possibility of the battery cell's tab being torn off.

[0007] In some embodiments, the support plate includes at least two side support plates, which are located on opposite sides of the battery core and disposed between the battery core and the side wall.

[0008] Through the above method, the side support plate arranged between the battery cell and the side wall can support the battery cell in the left and right directions, limit the movement of the battery cell in the left and right directions, thereby reducing the possibility of the tab being torn off due to the movement of the battery cell, and effectively protecting the connection between the tab and the battery cell.

[0009] In some embodiments, a bottom support plate is further included. The bottom support plate is located on a side of the battery core adjacent to at least two side support plates and is disposed between the battery core and the side wall.

[0010] Through the above method, the bottom support plate arranged between the battery cell and the side wall can support the battery cell in the up and down directions, limit the movement of the battery cell in the up and down directions, thereby reducing the possibility of the tab being torn off due to the movement of the battery cell, and effectively protecting the connection between the tab and the battery cell.

[0011] In some embodiments, one end of the two side support plates close to the bottom support plate is respectively connected to the bottom support plate.

[0012] In this way, the side support plate is connected to the bottom support plate as a whole. The support plate can play a guiding role when the battery cell is installed into the shell, making it easier to install the battery cell into the shell and limiting the movement of the battery cell on both sides.

[0013] In some embodiments, the two side support plates are integrally formed with the bottom support plate.

[0014] This arrangement ensures a stable connection between the side support plate and the bottom support plate, thereby enabling the support plate to better support the battery cells.

[0015] In some embodiments, the side panels are of equal thickness to the bottom panel.

[0016] Through the above method, the side support plate and the bottom support plate have similar strengths, so that the force is evenly distributed, thereby making the support plate structure more stable and easier to process and form.

[0017] In some embodiments, a first rounded corner is formed on the inner side of the connection between the side support plate and the bottom support plate, and a second rounded corner is formed on the outer side of the connection between the side support plate and the bottom support plate, and the radius of the first rounded corner is not less than the difference between the radius of the second rounded corner and the thickness of the side support plate or the bottom support plate.

[0018] By providing the first and second rounded corners in this manner, the battery cell can be guided when placed into the housing, making it easier to install the battery cell. Furthermore, the radius of the first rounded corner is no less than the difference between the radius of the second rounded corner and the thickness of the side support plate or the bottom support plate, ensuring a reasonable thickness at the junction of the side support plate and the bottom support plate and reducing stress concentration.

[0019] In some embodiments, a third rounded corner is formed on the inner side of the side wall of the housing, and the radius of the second rounded corner is greater than or equal to the radius of the third rounded corner.

[0020] By adopting the above-mentioned method, the stress generated when the battery cell is placed in the shell can be further reduced, the stress between the battery cell, the support plate and the shell can be improved, and the structural strength of the battery cell can be increased.

[0021] In some embodiments, the support plate has a first side facing the bottom wall and a second side facing away from the battery cell, a fourth rounded corner is formed at the connection between the first side and the second side, a fifth rounded corner is formed on the inner side of the connection between the side wall and the bottom wall of the shell, and the radius of the fourth rounded corner is greater than or equal to the radius of the fifth rounded corner.

[0022] By providing the fourth and fifth fillets in this manner, stress concentration can be reduced, thereby lowering the impact on battery cell assembly accuracy. Furthermore, the radius of the fourth fillet is greater than or equal to the radius of the fifth fillet, facilitating the insertion of the support plate into the housing and thus facilitating processing.

[0023] In some embodiments, the side wall includes a first side wall, a second side wall and a third side wall connected in sequence, the first side wall and the third side wall are arranged opposite to each other, a pole is arranged on the first side wall, the bottom support plate is located between the battery cell and the third side wall, and the side support plate is located between the battery cell and the second side wall.

[0024] Through the above method, the bottom support plate and the side support plate can better limit the shaking of the battery cell in the up, down, left and right directions, reducing the risk of the tab breakage.

[0025] In some embodiments, the bottom wall and the plurality of side walls are integrally formed to form a battery box, and the top plate covers the opening of the battery box, and the top plate is the wall with the largest area in the shell.

[0026] In the above manner, the battery cell can be installed into the accommodating space from the side of the shell with the largest area, and the battery box can well accommodate the battery cell.

[0027] In some embodiments, a flange edge is connected to the side of the side wall away from the bottom wall, and the flange edge extends from the end of the side wall away from the bottom wall to the outside of the accommodating space. The top plate is connected to the flange edge of the shell and cooperates with the shell to accommodate the battery cell.

[0028] Through the above method, the distance between the connection position of the top plate and the flange edge and the battery cell is increased, which is beneficial to reduce the probability of battery cell damage caused by light leakage during the connection process of the top plate and the flange edge; in addition, it can also reduce the damage to the battery cell caused by particulate matter falling into the battery cell, thereby protecting the battery cell and improving the reliability and safety of the battery cell.

[0029] In some embodiments, the battery cell includes a main body and a tab, and the length of the side support plate is greater than or equal to the length of the side surface on which the main body and the support plate are disposed.

[0030] Through the above method, the side support plate can fully support the battery cell and increase the force-bearing area of ​​the battery cell.

[0031] In some embodiments, the battery cell includes a main body and tabs, and there are multiple support plates located on one side of the battery cell. The length of each support plate is smaller than the length of the side surface where the main body and the support plate are abutted, and the support plates are spaced apart from each other.

[0032] By providing multiple side support plates at intervals on one side of the battery cell, compared to providing a single side support plate on one side of the battery cell, this saves material and thus reduces costs. Installing a battery cell with multiple side support plates in a battery cell can effectively reduce the weight of the battery cell.

[0033] In some embodiments, the outer surface of the battery cell is wrapped with an insulating film, and the support plate is hot-fused onto the insulating film.

[0034] In the above manner, the support plate is fixed to the insulating film, the support plate will not be displaced, and the stability of the support plate is enhanced.

[0035] In some embodiments, the support plate is connected to the housing.

[0036] In this way, the support plate is fixed to the housing and does not move, thereby enhancing the stability of the support plate. In some embodiments, the height of the support plate along the bottom wall toward the top plate is no greater than the height of the battery cell.

[0037] This arrangement can reduce the impact of the support plate's height along the bottom wall toward the top plate on the effective connection between the cell side walls, the bottom wall, and the top plate. While supporting the cell, the support plate does not increase the height of the battery cell, thereby effectively protecting the cell.

[0038] In some embodiments, the support plate is elastic, and when the battery cell is located in the accommodating space, the battery cell compresses the support plate.

[0039] Through the above method, the support plate can better support the battery cell and facilitate the battery cell to be installed into the shell.

[0040] In a second aspect, the present application provides a battery, which includes the battery cell in the above embodiment.

[0041] In a third aspect, the present application provides an electrical device, which includes the battery of the above embodiment, and the battery is used to power the electrical device.

[0042] 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

[0043] 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 numerals are used throughout the drawings to represent the same components. In the drawings:

[0044] FIG1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0045] FIG2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments;

[0046] FIG3 is a schematic structural diagram of a battery cell according to one or more embodiments;

[0047] FIG4 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments;

[0048] FIG5 is a cross-sectional view of a battery cell according to one or more embodiments;

[0049] FIG6 is an enlarged schematic diagram of D in FIG5 ;

[0050] 7 is another cross-sectional view of a battery cell according to one or more embodiments;

[0051] FIG8 is an enlarged schematic diagram of B in FIG7;

[0052] FIG9 is another cross-sectional view of a battery cell according to one or more embodiments;

[0053] FIG10 is an enlarged schematic diagram of C in FIG9 .

[0054] The accompanying drawings in the specific implementation manner are as follows:

[0055] 1000, vehicle; 200, controller; 300, motor; 100, battery; 10, housing; 11, first part; 12, second part;

[0056] 20. Battery cell; 21. Battery cell; 211. Main body; 212. Tab; 22. Shell; 221. Bottom wall; 222. Side wall; 2221. First side wall; 2222. Second side wall; 2223. Third side wall; 223. Top plate; 224. Post; 225. Flange; 23. Support plate; 231. Bottom support plate; 232. Side support plate; 233. First side surface; 234. Second side surface; 235. Third side surface; 236. Fourth side surface; 24. Battery box; 241. Opening; R1. First fillet; R2. Second fillet; R3. Third fillet; R4. Fourth fillet; R5. Fifth fillet. [Specific implementation method]

[0057] The following embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only used as examples and are not intended to limit the scope of protection of the present application.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0059] In the description of the embodiments of the present application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise clearly and specifically defined, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0060] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0061] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0062] 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0063] 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; 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.

[0064] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace.

[0065] The present application provides an electric device, which may include but is not limited to mobile phones, tablets, computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles and spacecraft, etc. Among them, the electric device may include a battery, and the electric device may provide electric energy through the battery to achieve the corresponding function of the electric device. Among them, the electric device may include a battery, and the electric device may provide electric energy through the battery to achieve the corresponding function of the electric device.

[0066] Batteries encounter various complex operating conditions during use. When the battery vibrates, it causes the individual cells to vibrate, which in turn causes the battery cells to vibrate up and down, left and right. Cell vibration can easily cause tabs to break, disrupting the current circuit and affecting battery performance. To minimize the impact of vibration on the battery cells, related technologies incorporate reinforcements or buffers on the outside of the battery to improve overall safety. However, this approach presents some challenges, such as increased overall battery weight and reduced cell strength.

[0067] Based on the above considerations, in order to solve the technical problems existing in battery cells in the prior art, the present application proposes a battery cell that can limit the vibration of the battery cell, reduce the possibility of tab breakage, and facilitate the installation of the battery cell into the shell.

[0068] The present application provides an electrical device, which may include but is not limited to mobile phones, tablets, computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft. The electrical device may include a battery, which may provide electrical energy to the device to achieve its corresponding function.

[0069] 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.

[0070] Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle according to one or more embodiments.

[0071] The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head, or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further 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, to meet the power requirements for starting, navigating, and driving the vehicle 1000.

[0072] 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.

[0073] In order to improve the performance of electrical devices, the present application also provides a battery 100, see Figure 2, which is a schematic diagram of the decomposed structure of the battery according to one or more embodiments. The shape of the battery 100 includes but is not limited to a square. In other embodiments, the shape of the battery 100 can also be cylindrical, square or any other shape. The battery 100 can be an energy storage device, etc. The energy storage device is a type of battery 100, which can be used as a power grid, or in scenarios such as home life or business, for storing and / or releasing electrical energy. The energy storage device can be an energy storage cabinet, an energy storage container, etc.

[0074] In some embodiments, the battery 100 may include a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 is used to provide a storage space for the battery cell 20 and may have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other and together define a storage space for the battery cell 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, with the first portion 11 overlapping the open side of the second portion 12, so that the first portion 11 and the second portion 12 together define a storage space. The first portion 11 and the second portion 12 may also each be a hollow structure with one end open, with the open side of the first portion 11 overlapping the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0075] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 may be housed within the housing 10. Alternatively, the battery 100 may be constructed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a complete battery module, and then housed within the housing 10. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0076] Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0077] Battery 100 can be manufactured in two ways: laminated and wound. Laminated batteries offer uniform current collection, low internal resistance, and high specific power, but they require extremely high mold precision, high equipment investment, and a relatively complex process, resulting in low production efficiency. Wound batteries are simple to manufacture, with moderate equipment precision requirements during the production and assembly processes. They offer high production efficiency and low cost. In terms of performance, wound batteries offer excellent high and low temperature performance, rapid charging, an extremely long lifespan, stable high output voltage, a sturdy structure, and strong shock resistance.

[0078] Please refer to Figures 3 and 4. Figure 3 is a schematic diagram of the structure of a battery cell according to one or more embodiments; Figure 4 is a schematic diagram of the exploded structure of a battery cell according to one or more embodiments. A battery cell 20 is the smallest unit that makes up a battery. As shown in Figure 4, the battery cell 20 of this embodiment includes a battery cell 21, a housing 22, and a support plate 23.

[0079] The housing 22 includes a bottom wall 221, a top plate 223, and multiple side walls 222. The multiple side walls 222 connect the top plate 223 and the bottom wall 221. The bottom wall 221, the multiple side walls 222, and the top plate 223 form a storage space. The battery cell 21 is disposed in the storage space. The support plate 23 is disposed in the storage space and is sandwiched between the side walls 222 and the battery cell 21.

[0080] Specifically, the battery cell 21 is a component in the battery cell 20 where electrochemical reactions occur.

[0081] The shell 22 is a component for forming the internal environment of the battery cell 20, wherein the internal environment formed can be used to accommodate the battery cell 21, electrolyte and other components. One or more battery cells 21 can be contained in the shell 22. The shell 22 includes a bottom wall 221, a side wall 222 and a top plate 223. The bottom wall 221, the side wall 222 and the top plate 223 can be independent components, and an opening is provided at the connection between the side wall 222 and the bottom wall 221 and the top plate 223. The top plate 223 and the side wall 222 cover the opening through the opening to form the internal environment of the battery cell 20. Without limitation, the bottom wall 221 and the side wall 222 can be integrally formed, that is, the bottom wall 221 and the side wall 222 form a common connection surface before other components are inserted into the shell, and when the interior of the shell 22 needs to be encapsulated, the top plate 223 is then covered with the shell 22. In other embodiments, the top plate 223 and the side wall 222 may be integrally formed, that is, the top plate 223 and the side wall 222 form a common connection surface before other components are inserted into the shell. When the interior of the shell 22 needs to be encapsulated, the bottom wall 221 covers the shell 22.

[0082] The housing 22 can have a variety of shapes and sizes, including but not limited to a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. The shape of the housing 22 can be determined based on the specific shape and size of the battery cell 21. The housing 22 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0083] The support plate 23 is used to support the battery cells 21. The support plate 23 is placed between the side wall 222 and the side of the adjacent battery cell 21. There is at least one support plate 23, and the number of support plates 23 can be one, two, three, or more. The shape of the support plate 23 corresponds to the shape of the side of the adjacent battery cell 21. For example, if the side of a battery cell 21 is plate-shaped, the support plate 23 adjacent to the side of the battery cell 21 should have a corresponding plate shape. When the battery cell 20 is subjected to an external impact, the support plate 23 can absorb some of the impact force, reducing the impact on the battery cell 21.

[0084] In one embodiment, the side surfaces of the battery cell 21 and the sidewalls 222 are interference-fitted to hold the support plate 23 , thereby achieving a secure connection between the battery cell 21 , the housing 22 , and the support plate 23 , thereby enabling the support plate 23 to better support the battery cell 21 .

[0085] In the above manner, the battery cell 20 is formed into a whole by the battery cell 21, the support plate 23 and the shell 22. The support plate 23 can support the battery cell 21 and limit the movement of the battery cell 21 in the shell 22, thereby reducing the possibility of the tab 212 of the battery cell 21 being torn off.

[0086] In one embodiment, the support plate 23 is a plastic plate.

[0087] Due to the stable nature of the plastic plate, the support plate 23 is placed on the side of the battery cell 21, and the support plate 23 does not react with the electrolyte. The plastic plate is easy to bond and can also reduce the probability of internal short circuits in the battery cell 20.

[0088] Please refer to Figures 5 and 6 . Figure 5 is a cross-sectional view of a battery cell according to one or more embodiments; Figure 6 is an enlarged schematic diagram of D in Figure 5 . In conjunction with Figures 3 and 4 , according to some embodiments of the present application, the support plate 23 includes at least two side support plates 232 . The side support plates 232 are located on opposite sides of the battery cell 21 and are disposed between the battery cell 21 and the side wall 222 .

[0089] Specifically, the side support plates 232 are used to support the opposite sides of the battery cell 21. The opposite sides of the battery cell 21 can be the left and right sides. A side support plate 232 is provided on each side of the battery cell 21. The side support plates 232 are disposed adjacent to the bottom support plate 231 and are disposed between the battery cell 21 and the side wall 222. The side support plates 232 can fix the positions of the opposite sides of the battery cell 21, limiting movement of the battery cell 21 in the opposite directions.

[0090] In the above manner, the side support plate 232 arranged between the battery cell 21 and the side wall 222 can support the battery cell 21 in the left and right directions, limit the movement of the battery cell 21 in the left and right directions, thereby reducing the possibility of the tab 212 being torn off due to the movement of the battery cell 21, and effectively protecting the connection between the tab 212 and the battery cell 21.

[0091] According to some embodiments of the present application, a bottom support plate 231 is further included. The bottom support plate 231 is located on a side of the battery cell 21 adjacent to at least two side support plates 232 and is disposed between the battery cell 21 and the side wall 222 .

[0092] The bottom support plate 231 is used to support the battery cell 21. The bottom support plate 231 is located in the accommodating space. A bottom support plate 231 is located on a side of the battery cell 21 that is adjacent to at least two side support plates 232. For example, the bottom support plate 231 is located on the lower side of the battery cell 21. The shape of the bottom support plate 231 matches the shape of one side of the adjacent battery cell 21. For example, the lower side of the battery cell 21 is plate-shaped, and the bottom support plate 231 is plate-shaped corresponding thereto. In other embodiments, when a raised pole lug 212 is provided on the upper side of the battery cell 21, a bottom support plate 231 may also be provided on the side of the battery cell 21 close to the pole lug 212, that is, the bottom support plate 231 is located on the upper side of the battery cell 21. The bottom support plate 231 close to the pole lug 212 can wrap the raised pole lug 212. The bottom support plate 231 is disposed between the battery cell 21 and the side wall 222 to facilitate the installation of the battery cell 21 into the housing 22 , reduce the extrusion deformation at the connection between the battery cell 21 and the housing 22 , and limit the movement of the battery cell 21 up and down.

[0093] In the above manner, the bottom support plate 231 arranged between the battery cell 21 and the side wall 222 can support the battery cell 21 in the up and down directions, limit the movement of the battery cell 21 in the up and down directions, thereby reducing the possibility of the tab 212 being torn off due to the movement of the battery cell 21, and effectively protecting the connection between the tab 212 and the battery cell 21.

[0094] Please refer to Figures 7 and 8. Figure 7 is another cross-sectional view of a battery cell according to one or more embodiments; Figure 8 is an enlarged view of area B in Figure 7. In conjunction with Figures 3 to 6, according to some embodiments of the present application, the ends of the two side support plates 232 proximal to the bottom support plate 231 are respectively connected to the bottom support plate 231.

[0095] Specifically, one end of the two side support plates 232 can be respectively connected to the opposite sides of the bottom support plate 231. The other ends of the two side support plates 232 can extend in the same direction. The bottom support plate 231 is used to support the battery cell 21. The bottom support plate 231 is located in the accommodating space. The bottom support plate 231 can be arranged on the side of the battery cell 21 away from the pole tab 212. The bottom support plate 231 can also be arranged on the side of the battery cell 21 close to the pole tab 212. Or a bottom support plate 231 is respectively arranged on the side of the battery cell 21 away from the pole tab 212 and the side of the battery cell 21 close to the pole tab 212. The shape of the bottom support plate 231 matches the shape of one side of the adjacent battery cell 21.

[0096] The side support plates 232 are used to support the opposite sides of the battery cell 21. The opposite sides of the battery cell 21 are the same as the opposite sides of the bottom support plate 231. The side support plates 232 are arranged adjacent to the bottom support plate 231. The bottom support plate 231 is located between the two side support plates 232.

[0097] One end of each of the two side support plates 232 is connected to opposite sides of the bottom support plate 231, and the other ends of the two side support plates 232 extend in the same direction. Therefore, the support plate 23 can be in a "U" shape. For example, the bottom support plate 231 is disposed on the side of the battery cell 21 away from the tab 212, and the side support plates 232 are disposed on opposite sides of the battery cell 21, extending along the opposite sides of the battery cell 21.

[0098] By such arrangement, the side support plate 232 is connected to the bottom support plate 231 as a whole, and the support plate 23 can play a guiding role when the battery cell 21 is installed into the shell 22, thereby facilitating the installation of the battery cell 21 into the shell 22 and limiting the movement of the battery cell 21 on two opposite sides.

[0099] According to some embodiments of the present application, the two side support plates 232 are integrally formed with the bottom support plate 231. The support plates 23 are installed in the housing 22 before the battery cells 21 are installed in the housing 22. After the battery cells 21 are installed in the housing, the support plates 23 support the battery cells 21. The angle between the side support plates 232 and the bottom support plate 231 includes, but is not limited to, 45 degrees, 90 degrees, 135 degrees, etc.

[0100] This arrangement allows a stable connection between the side support plate 232 and the bottom support plate 231, so that the support plate 23 can better support the battery cell 21. According to some embodiments of the present application, the side support plate 232 and the bottom support plate 231 have the same thickness.

[0101] Specifically, the side support plates 232 and the bottom support plate 231 have the same thickness, and therefore have similar strength. After the battery cells 21 are installed in the housing 22, the side support plates 232 and the bottom support plate 231 are subjected to the same extrusion force, resulting in the same amount of compression, which can evenly distribute the extrusion force.

[0102] By such arrangement, the side support plate 232 and the bottom support plate 231 have similar strengths, so that the force is evenly distributed, thereby making the support plate 23 more structurally stable and easier to process and shape.

[0103] According to some embodiments of the present application, a first rounded corner R1 is formed on the inner side of the connection between the side support plate 232 and the bottom support plate 231. A second rounded corner R2 is formed on the outer side of the connection between the side support plate 232 and the bottom support plate 231. The radius of the first rounded corner R1 is not less than the difference between the radius of the second rounded corner R2 and the thickness of the side support plate 232 or the bottom support plate 231.

[0104] Specifically, the support plate 23 is disposed in the accommodating space, and the battery cell 21 is located within the support plate 23. The connection between the side support plate 232 and the bottom support plate 231 is formed at a first rounded corner R1 facing the battery cell 21. The connection between the side support plate 232 and the bottom support plate 231 is formed at a second rounded corner R2 facing the side wall 222.

[0105] The radius of the first fillet R1 is greater than or equal to the difference between the radius of the second fillet R2 and the thickness of the side support plate 232 or the bottom support plate 231, so that the thickness of the connection between the side support plate 232 and the bottom support plate 231 is within a normal range and will not be too thin or too thick. At the same time, it can effectively alleviate the stress concentration at the connection between the side support plate 232 and the bottom support plate 231 and will not affect the installation accuracy of the battery cell 20.

[0106] In this manner, the provision of the first rounded corner R1 and the second rounded corner R2 can serve as a guide when the battery cell 21 is placed into the housing 22, making it easier to install the battery cell 21. Furthermore, the radius of the first rounded corner R1 is not less than the difference between the radius of the second rounded corner R2 and the thickness of the side support plate 232 or the bottom support plate 231. This ensures a reasonable thickness at the connection between the side support plate 232 and the bottom support plate 231 and reduces stress concentration.

[0107] According to some embodiments of the present application, a third rounded corner R3 is formed on the inner side of the side wall 222 of the housing 22. The radius of the second rounded corner R2 is greater than or equal to the radius of the third rounded corner R3.

[0108] Specifically, the side of the sidewall 222 facing the battery cell 21 is configured as a third rounded corner R3. After the tray 23 is installed in the housing 22, the tray 23 is positioned adjacent to the sidewall 222 of the housing 22, so that the second rounded corner R2 of the tray 23 is adjacent to the third rounded corner R3 of the housing 22. The radius of the second rounded corner R2 is greater than or equal to the radius of the third rounded corner R3. When the tray 23 is placed in the housing 22, the connection between the sidewall 222 and the bottom wall 221 can better connect with the third rounded corner R3 of the sidewall 222, thereby improving the structural strength of the battery cell 20.

[0109] By adopting the above-mentioned method, the stress generated when the battery cell 21 is placed in the housing 22 can be further reduced, the stress between the battery cell 21 , the support plate 23 and the housing 22 can be improved, and the structural strength of the battery cell 20 can be enhanced.

[0110] In one embodiment, the radius of the third rounded corner R3 is 1 mm, so the radius of the second rounded corner R2 is greater than or equal to 1 mm. The radius of the second rounded corner R2 includes but is not limited to 1 mm, 1.1 mm, 1.2 mm, 1.25 mm, 1.3 mm, 1.5 mm, 1.7 mm, 1.8 mm, 2 mm, 3 mm, etc.

[0111] Please refer to Figures 9 and 10. Figure 9 is another cross-sectional view of a battery cell according to one or more embodiments; Figure 10 is an enlarged schematic diagram of section C in Figure 9. In conjunction with Figures 3 to 8, according to some embodiments of the present application, the support plate 23 has a first side surface 233 facing the bottom wall 221 and a second side surface 234 facing away from the battery cell 21. A fourth rounded corner R4 is formed at the junction of the first side surface 233 and the second side surface 234. A fifth rounded corner R5 is formed on the inner side of the junction between the side wall 222 and the bottom wall 221 of the housing 22. The radius of the fourth rounded corner R4 is no greater than the radius of the fifth rounded corner R5.

[0112] Specifically, the first side surface is adjacent to the second side surface. A fourth fillet R4 is provided at the connection between the first side surface 233 and the second side surface 234 of the support plate 23. In one embodiment, the support plate 23 may further include a third side surface 235 opposite the first side surface 233 and a fourth side surface 236 opposite the second side surface 234. A fourth fillet R4 is provided at the connection between the first side surface 233 and the fourth side surface 236. A fourth fillet R4 is provided at the connection between the second side surface 234 and the third side surface 235. A fourth fillet R4 is provided between the third side surface 235 and the fourth side surface 236. Four fourth fillets R4 are provided on the outer surface of the support plate 23. A fifth fillet R5 is formed at the connection between the side wall 222 and the bottom wall 221 of the housing 22 on the side facing the accommodating cavity. The radius of the fifth fillet R5 is less than or equal to the radius of the fourth fillet R4.

[0113] By providing the fourth and fifth fillets R4 and R5 in the above manner, stress concentration can be effectively reduced, thereby lowering the impact on the assembly accuracy of the battery cell 20. Furthermore, the radius of the fourth fillet R4 is greater than or equal to the radius of the fifth fillet R5, facilitating the insertion of the support plate 23 into the housing 22 and thus facilitating the processing operation.

[0114] In one embodiment, the radius of the fifth rounded corner R5 is 0.2 mm, so the radius of the fourth rounded corner R4 is greater than or equal to 0.2 mm. The radius of the second rounded corner R2 includes, but is not limited to, 0.2 mm, 0.21 mm, 0.22 mm, 0.25 mm, 0.3 mm, 0.31 mm, 0.35 mm, 0.4 mm, 0.41 mm, 0.45 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1 mm, etc.

[0115] According to some embodiments of the present application, the sidewalls include a first sidewall, a second sidewall, and a third sidewall connected in sequence. The first sidewall and the third sidewall are disposed opposite each other. A pole 224 is disposed on the first sidewall 2221. The bottom support plate 231 is located between the battery cell 21 and the third sidewall 2223. The side support plate 232 is located between the battery cell 21 and the second sidewall 2222.

[0116] Specifically, there may be two second side walls 2222. The two second side walls 2222 are respectively located on opposite sides of the first side wall 2221. One end of the second side wall 2222 is connected to the first side wall 2221, and the other end is connected to the third side wall 2223.

[0117] In the above manner, the bottom support plate 231 and the side support plate 232 can better limit the shaking of the battery cell 21 in the up, down, left and right directions, thereby reducing the risk of the tab 212 being broken.

[0118] According to some embodiments of the present application, the bottom wall 221 and the multiple side walls 222 are integrally formed to form the battery box 24 , and the top plate 223 covers the opening 241 of the battery box 24 . The top plate 223 is the wall with the largest area in the shell 22 .

[0119] In the above manner, the battery cell 21 can be installed into the accommodating space from the side of the shell 22 with the largest area, and the battery box 24 can well accommodate the battery cell 21.

[0120] According to some embodiments of the present application, a flange edge 225 is connected to the side of the side wall 222 away from the bottom wall 221, and the flange edge 225 extends from the end of the side wall 222 away from the bottom wall 221 to the outside of the accommodating space. The top plate 223 is connected to the flange edge 225 of the shell 22, and cooperates with the shell 22 to accommodate the battery cell 21.

[0121] Specifically, a flange 225 is connected to the side of the sidewall 222 of the housing 22 away from the bottom wall 221. The flange 225 and the sidewall 222 can be separate components. Alternatively, the flange 225 and the sidewall 222 can be integrally formed. The flange 225 extends from the end of the sidewall 222 away from the bottom wall 221 and extends outwardly toward the accommodating space, so that the flange 225 is located on the outer periphery of the sidewall 222.

[0122] The top plate 223 can be plate-shaped. It covers the opening of the housing and is connected to the flange 225 of the housing 22. The top plate 223 is connected to the end of the flange 225 that faces away from the battery cells 21. The location of the connection between the top plate 223 and the flange 225 depends on the shape of the flange 225 and the top plate 223 and is not limited here.

[0123] Through the above method, the distance between the connection position of the top plate 223 and the flange edge 225 and the battery cell 21 is increased, which is beneficial to reducing the probability of damage to the battery cell 21 due to light leakage during the connection process of the top plate 223 and the flange edge 225; in addition, it can also reduce the damage to the battery cell 21 caused by particulate matter falling into the battery cell 21, thereby protecting the battery cell 21 and improving the reliability and safety of the battery cell 20.

[0124] According to some embodiments of the present application, the battery cell 21 includes a body 211 and a tab 212 , and a length L3 of the support plate 23 is greater than or equal to a length L4 of a side surface where the body 211 and the support plate 23 are abutted.

[0125] Specifically, the tab 212 can be arranged at one end of the main body 211. The main body 211 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the main body 211. The tab 212 is composed of the parts of the positive electrode sheet and the negative electrode sheet without active substances. The tab 212 includes a positive electrode tab and a negative electrode tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body 211 or respectively at both ends of the main body 211. During the charge and discharge process of the battery, the positive electrode active substance and the negative electrode active substance react with the electrolyte, and the tab 212 connects the pole 224 to form a current loop.

[0126] The direction of the length L3 of the support plate 23 is the same as the direction of the length L4 of the side surface of the main body 211 and the support plate 23 .

[0127] In one embodiment, the sidewall 222 includes a first sidewall 2221, a second sidewall 2222, and a third sidewall 2223, which are sequentially connected. The first sidewall 2221 and the third sidewall 2223 are disposed opposite each other. The second sidewall 2222 is disposed between the first sidewall 2221 and the third sidewall 2223. The support plate 23 is disposed between the first sidewall 2221 and the main body 211. Along a direction parallel to the bottom wall 221 and the first sidewall 2221, the length L3 of the support plate 23 is greater than or equal to the length L4 of the side surface of the main body 211 where the support plate 23 is disposed in contact.

[0128] In another specific embodiment, the sidewall 222 includes a first sidewall 2221, a second sidewall 2222, and a third sidewall 2223, which are connected in sequence. The first sidewall 2221 and the third sidewall 2223 are disposed opposite each other. The second sidewall 2222 is disposed between the first sidewall 2221 and the third sidewall 2223. The support plate 23 is disposed between the second sidewall 2222 and the main body 211. Along a direction parallel to the bottom wall 221 and the second sidewall 2222, the length L3 of the support plate 23 is greater than or equal to the length L4 of the side surface of the main body 211 where the support plate 23 is disposed in contact.

[0129] Through the above method, when the battery cell 20 vibrates frequently or strongly, the support plate 232 can fully support the battery cell 21, increase the force-bearing area of ​​the battery cell 21, and reduce the impact of vibration on the battery cell 21.

[0130] According to some embodiments of the present application, the battery cell 21 includes a main body 211 and a tab 212, and there are multiple support plates 23 located on one side of the battery cell 21. The length L3 of each support plate 23 is smaller than the length L4 of the side surface on which the main body 211 and the support plate 23 are abutted, and the battery cells are spaced apart from each other.

[0131] Specifically, adjacent support plates 23 are spaced apart. The support plates 23 do not overlap. The support plates 23 are non-overlappingly attached to the surface of the main body 211. The length L3 of the support plates 23 is in the same direction as the length L4 of the side surface of the main body 211 where the support plates 23 are attached.

[0132] In one embodiment, the sidewall 222 includes a first sidewall 2221, a second sidewall 2222, and a third sidewall 2223, which are sequentially connected. The first sidewall 2221 and the third sidewall 2223 are disposed opposite each other. The second sidewall 2222 is disposed between the first sidewall 2221 and the third sidewall 2223. A plurality of support plates 23 are disposed between the first sidewall 2221 and the main body 211. Along a direction parallel to the bottom wall 221 and the first sidewall 2221, the length L3 of the support plates 23 is less than the length L4 of the side surface of the main body 211 where the support plates 23 are disposed in contact.

[0133] In another specific embodiment, the sidewall 222 includes a first sidewall 2221, a second sidewall 2222, and a third sidewall 2223, which are connected in sequence. The first sidewall 2221 and the third sidewall 2223 are disposed opposite each other. The second sidewall 2222 is disposed between the first sidewall 2221 and the third sidewall 2223. A plurality of support plates 23 are disposed between the second sidewall 2222 and the main body 211. Along a direction parallel to the bottom wall 221 and the second sidewall 2222, the length L3 of the support plates 23 is less than the length L4 of the side surface of the main body 211 where the support plates 23 are disposed in contact.

[0134] Disposing multiple side support plates 232 at intervals on one side of the battery cell 21 saves material and thus reduces costs compared to disposing a single side support plate 232 on one side of the battery cell 21. Installing a battery cell 21 with multiple side support plates 232 within a battery cell 20 can effectively reduce the weight of the battery cell 20.

[0135] According to some embodiments of the present application, the outer surface of the battery cell 21 is wrapped with an insulating film (not shown in the figure), and the support plate 23 is hot-fused onto the insulating film.

[0136] Specifically, an insulating film is wrapped around the outside of the battery cell 21 and fixedly connected to the battery cell 21. The insulating film is similar to plastic paper. The battery cell 21 wrapped with the insulating film is placed in the housing 22. The insulating film is then heat-fused to the support plate 23, ensuring a stable connection between the battery cell 21 and the support plate 23. Methods for heat-fusion of the insulating film to the support plate 23 include, but are not limited to, using hot melt adhesive or electric heating.

[0137] In the above manner, the support plate 23 is fixed to the insulating film, and the support plate 23 will not be displaced, thereby enhancing the stability of the support plate 23.

[0138] According to some embodiments of the present application, the support plate 23 is connected to the housing 22. Specifically, the support plate 23 is fixedly connected to the side wall 222 of the housing 22. Connection methods include but are not limited to welding, bonding, and hot melt connection.

[0139] In the above manner, the support plate 23 is fixed to the housing 22 , and the support plate 23 does not move, thereby enhancing the stability of the support plate 23 .

[0140] According to some embodiments of the present application, along the bottom wall 221 toward the top plate 223 , the height of the support plate 23 is no greater than the height of the battery cell 21 .

[0141] Specifically, the height of the support plate 23 is aligned with the height of the battery cell 21. On either side of the height of the battery cell 21, the battery cell 21 is connected to the bottom wall 221 and the top plate 223, respectively. The height of the battery cell 21 is greater than or equal to the height of the support plate 23. This arrangement reduces the impact of the support plate 23's height on the effective connection between the bottom wall 221 and the top plate 223 on either side of the height of the battery cell 21. While supporting the battery cell 21, the support plate 23 does not increase the height of the battery cell 20, thereby effectively protecting the battery cell 21.

[0142] In one embodiment, the height L1 of the support plate 23 is no greater than 10 mm.

[0143] Specifically, the height L1 of the support plate 23 is not greater than 10 mm, including but not limited to 10 mm, 9.5 mm, 9 mm, 8 mm, 7 mm, 6 mm, 5 mm, 4 mm, 3 mm, 2 mm, 1 mm, 0.5 mm, etc. The height L1 of the support plate 23 is not greater than the height of the battery cell 21, so the height of the battery cell 21 is greater than or equal to 10 mm.

[0144] In the above manner, the height L1 of the support plate 23 is no greater than 10 mm, which facilitates reasonable setting of the height of the support plate 23 and facilitates processing operations.

[0145] According to some embodiments of the present application, referring to FIG. 6 , the thickness L2 of the support plate 23 is not greater than 1 mm.

[0146] Specifically, the thickness of the bottom support plate 231 and the side support plate 232 is greater than or equal to 1 mm, including but not limited to 1 mm, 2 mm, 3.5 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 1 cm, 1 decimeter, etc.

[0147] In the above manner, the thickness L2 of the support plate 23 is no greater than 1 mm, which facilitates reasonable setting of the thickness L2 of the support plate 23 and facilitates processing operations.

[0148] According to some embodiments of the present application, the support plate 23 is elastic, and when the battery cell 21 is located in the accommodating space, the battery cell 21 compresses the support plate 23 .

[0149] Specifically, the dimension of the support plate 23 along the direction of the battery cell 21 toward the side wall 222 is the thickness of the support plate 23. When the support plate 23 is not installed in the shell 22, the thickness of the support plate 23 is greater than the distance between the battery cell 21 and the side wall 222 of the shell 22. The support plate 23 has a certain elasticity and can be compressed and rebounded. The support plate 23 can be installed in the shell 22 before the battery cell 21 is installed in the shell 22. When the battery cell 21 is placed in the shell 22, the support plate 23 will be compressed to facilitate the battery cell 21 to enter the shell 22. After the battery cell 21 is placed in the shell 22, the support plate 23 rebounds, and the battery cell 21 fits tightly against the support plate 23. At the same time, the support plate 23 supports the battery cell 21, and the battery cell 21 forms an interference fit with the side wall 222 of the shell 22. When the battery cell 20 vibrates, the support plate 23 can buffer the impact of the vibration on the battery cell 21, and play a certain protective role for the battery cell 21.

[0150] The material of the support plate 23 includes but is not limited to sponge, polypropylene, etc. For example, it can be irradiated cross-linked polypropylene foam (IXPP), microcellular polypropylene (MPP), etc.

[0151] In the above manner, the support plate 23 can better support the battery cell 21 and facilitate the installation of the battery cell 21 into the housing 22 .

[0152] According to some embodiments of the present application, a battery 100 is provided, comprising a battery cell 20 as described in any of the above embodiments. An energy storage device is a type of battery 100 and can be used as a power grid, or in household or commercial settings, to store and / or release electrical energy. The energy storage device can be an energy storage cabinet, an energy storage container, or the like.

[0153] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 100 described in any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.

[0154] The power-consuming device may be a mobile phone, a computer, a car, or any of the aforementioned devices or systems using the battery 100 .

[0155] Finally, in a specific application scenario, the battery cell 20 includes a battery cell 21, a shell 22, and a support plate 23. The shell 22 includes a bottom wall 221, side walls 222, and a top plate 223. The side walls 222 connect the top plate 223 and the bottom wall 221. The bottom wall 221, the side walls 222, and the top plate 223 form a storage space. The battery cell 21 is disposed in the storage space. The support plate 23 is disposed in the storage space. The support plate 23 is clamped between the side walls 222 and the battery cell 21. The support plate 23 includes a bottom support plate 231 and two side support plates 232 connected to the bottom support plate 231. One end of the two side support plates 232 is connected to opposite sides of the bottom support plate 231, respectively. The other ends of the two side support plates 232 extend in the same direction. The side support plates 232 are perpendicular to the bottom support plate 231. The thickness of the side support plates 232 is equal to that of the bottom support plate 231. A first rounded corner R1 is formed on the inner side of the connection between the side support plate 232 and the bottom support plate 231. A second rounded corner R2 is formed on the outer side of the connection between the side support plate 232 and the bottom support plate 231. The radius of the first rounded corner R1 is not less than the difference between the radius of the second rounded corner R2 and the thickness of the side support plate 232 or the bottom support plate 231. A third rounded corner R3 is formed on the inner side of the side wall 222 of the shell 22. The radius of the second rounded corner R2 is not greater than the radius of the third rounded corner R3. A fourth rounded corner R4 is formed on the outer surface of the support plate 23. A fifth rounded corner R5 is formed on the inner side of the connection between the side wall 222 and the bottom wall 221 of the shell 22. The radius of the fourth rounded corner R4 is not greater than the radius of the fifth rounded corner R5. The height of the support plate 23 is not greater than the height of the battery cell 21. The height L1 of the support plate 23 is not greater than 10 mm. The thickness L2 of the support plate 23 is not greater than 1 mm.

[0156] The battery cell 20 is formed into a whole by the battery cell 21 , the support plate 23 and the shell 22 . The support plate 23 can support the battery cell 21 and limit the movement of the battery cell 21 in the shell 22 , thereby reducing the possibility of the tab 212 of the battery cell 21 being torn off.

[0157] 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 cell, characterized in that: The battery cell comprises: A housing, the housing comprising a bottom wall, a top plate, and a plurality of side walls, the side walls connecting the top plate and the bottom wall, the bottom wall, the plurality of side walls, and the top plate forming an accommodating space; A battery cell is disposed in the accommodating space; The support plate is arranged in the accommodating space and clamped between the side wall and the battery core.

2. The battery cell according to claim 1, wherein: The support plate includes at least two side support plates, which are located on opposite sides of the battery core and arranged between the battery core and the side wall.

3. The battery cell according to claim 2, characterized in that: It also includes a bottom support plate, which is located on a side of the battery core adjacent to at least two of the side support plates and is arranged between the battery core and the side wall.

4. The battery cell according to claim 3, characterized in that One end of the two side supporting plates close to the bottom supporting plate is respectively connected to the bottom supporting plate.

5. The battery cell according to claim 4, characterized in that The two side supporting plates are integrally formed with the bottom supporting plate.

6. The battery cell according to claim 4 or 5, characterized in that: The side supporting plate and the bottom supporting plate have the same thickness.

7. The battery cell according to any one of claims 4 to 6, characterized in that: A first rounded corner is formed on the inner side of the connection between the side support plate and the bottom support plate, and a second rounded corner is formed on the outer side of the connection between the side support plate and the bottom support plate. The radius of the first rounded corner is not less than the difference between the radius of the second rounded corner and the thickness of the side support plate or the bottom support plate.

8. The battery cell according to claim 7, characterized in that A third rounded corner is formed on the inner side of the side wall of the shell, and the radius of the second rounded corner is greater than or equal to the radius of the third rounded corner.

9. The battery cell according to any one of claims 1 to 8, characterized in that: The support plate has a first side surface facing the bottom wall and a second side surface away from the battery cell, a fourth rounded corner is formed at the connection between the first side surface and the second side surface, a fifth rounded corner is formed on the inner side of the connection between the side wall and the bottom wall of the shell, and the radius of the fourth rounded corner is greater than or equal to the radius of the fifth rounded corner.

10. The battery cell according to any one of claims 3 to 8, characterized in that: The side wall includes a first side wall, a second side wall and a third side wall connected in sequence, the first side wall is arranged opposite to the third side wall, a pole is arranged on the first side wall, the bottom support plate is located between the battery cell and the third side wall, and the side support plate is located between the battery cell and the second side wall.

11. The battery cell according to any one of claims 1 to 10, characterized in that: The bottom wall and the plurality of side walls are integrally formed to form a battery box. The top plate covers the opening of the battery box. The top plate is the wall with the largest area in the shell.

12. The battery cell according to any one of claims 1 to 11, characterized in that: A flange is connected to one side of the side wall away from the bottom wall. The flange extends from one end of the side wall away from the bottom wall toward the outside of the accommodating space. The top plate is connected to the flange of the shell.

13. The battery cell according to any one of claims 1 to 12, characterized in that: The battery core includes a main body and a tab, and the length of the support plate is greater than or equal to the length of the side surface where the main body and the support plate are placed against each other.

14. The battery cell according to any one of claims 1 to 12, characterized in that: The battery cell includes a main body and tabs. There are multiple support plates located on one side of the battery cell. The length of each support plate is smaller than the length of the side surface where the main body and the support plate are abutted, and the support plates are spaced apart from each other.

15. The battery cell according to any one of claims 1 to 14, characterized in that: The outer surface of the battery core is wrapped with an insulating film, and the support plate is hot-fused on the insulating film.

16. The battery cell according to any one of claims 1 to 14, characterized in that: The supporting plate is connected to the shell.

17. The battery cell according to any one of claims 1 to 16, characterized in that: Along the bottom wall toward the top plate, the height of the support plate is no greater than the height of the battery core.

18. The battery cell according to any one of claims 1 to 17, characterized in that: The supporting plate is elastic, and when the battery core is located in the accommodating space, the battery core compresses the supporting plate.

19. A battery, characterized in that: The battery comprises the battery cell according to any one of claims 1 to 18.

20. An electrical device, characterized in that: The electric device comprises the battery as claimed in claim 19, and the battery is used to power the electric device.

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