CN220963569U - Battery monomer, battery and power consumption device - Google Patents

Abstract

The application is suitable for the technical field of batteries, and provides a battery monomer, a battery and an electricity utilization device. The battery unit comprises a shell, an electrode assembly and a supporting part, wherein the shell is provided with a first wall, a weak part and a pressure relief area are arranged on the first wall, and the area covered or surrounded by the weak part is the pressure relief area; the electrode assembly is arranged in the shell; the supporting component is arranged in the shell and is positioned between the first wall and the main body part of the electrode assembly, the supporting component is provided with a first area corresponding to the pressure relief area at least partially, the first area is provided with first ventilation holes and first reinforcing structures, the first ventilation holes are communicated with two sides of the supporting component in the thickness direction, and the first reinforcing structures are used for reinforcing the strength of the first area. The battery monomer, the battery and the power utilization device can provide the flatness of the supporting part, reduce the risk of deformation of the supporting part and facilitate assembly.

Description

Battery monomer, battery and power consumption device

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery monomer, a battery and an electric device.

Background

In order to ensure the safety and reliability of the battery cell, an explosion-proof valve is usually arranged on the shell of the battery cell. In order to facilitate rapid discharge of the gas, ventilation holes are generally formed in a supporting part in the housing, so that the gas in the housing flows to the explosion-proof valve when the gas pressure in the housing is high. This may result in the rigidity of the support member at the position where the ventilation holes are provided being lower than the rigidity of the other positions, affecting the flatness of the support member.

Disclosure of Invention

In view of the above, the present application provides a battery cell, a battery and an electric device, which aim to solve the technical problem of poor flatness of a supporting member.

In a first aspect, an embodiment of the present application provides a battery cell, including: the shell is provided with a first wall, a weak part and a pressure relief area are arranged on the first wall, and the area covered or surrounded by the weak part is the pressure relief area; an electrode assembly disposed within the housing; and the support part is arranged in the shell and is positioned between the first wall and the main body part of the electrode assembly, the support part is provided with a first area at least partially corresponding to the pressure relief area, the first area is provided with a first ventilation hole and a first reinforcing structure, the first ventilation hole is communicated with two sides of the thickness direction of the support part, and the first reinforcing structure is used for reinforcing the strength of the first area.

According to the battery monomer, the first air holes and the first reinforcing structures are arranged in the first area, which at least partially corresponds to the pressure relief area, in the supporting component, so that the rigidity of the first area of the supporting component can be enhanced, the rigidity difference between the first area of the supporting component and the rigidity of other areas is smaller, the flatness of the supporting component can be improved to a certain extent, the use requirement is met, and the supporting component is not easy to deform after being molded, so that the assembly is convenient.

In some embodiments, at least a portion of the first reinforcing structure is located in an area of the first region corresponding to the pressure relief area location. At least part of the first reinforcing structure is positioned in the region corresponding to the pressure relief region in the first region, and at least part of the first reinforcing structure is adjacent to the first air holes, so that the rigidity of the position of the support part where the first air holes are formed can be enhanced to a certain extent, and the planeness of the support part can be improved.

In some embodiments, all of the first reinforcing structure is located in an area of the first area corresponding to the pressure relief area location. All of the first reinforcing structure is located in the region corresponding to the pressure relief region in the first region, and can be arranged close to the first air holes, so that the rigidity of the position of the first air holes formed in the supporting part can be enhanced to a certain extent, and the flatness of the supporting part can be improved.

In some embodiments, at least a portion of the first reinforcing structure extends in a first direction that is parallel to or disposed at an acute angle to a length direction of the support member. Because the arrangement of the first ventilation holes generally enables the two ends of the supporting component in the length direction to tilt, the first reinforcing structure extends at least partially along the first direction X to enhance the rigidity of the supporting component in the length direction, so that the flatness of the supporting component can be improved to a certain extent.

In some embodiments, the first reinforcing structure comprises a bar-shaped structure extending along the first direction. The first reinforced structure adopts the structure that this embodiment provided, simple structure, the preparation of being convenient for.

In some embodiments, the first ventilation holes are provided in plurality, and the first reinforcing structure is provided between at least two adjacent first ventilation holes. Since the rigidity of the gap between two adjacent first ventilation holes is generally low, the first reinforcing structure is arranged at the gap to improve the rigidity of the gap, so that the flatness of the support part can be improved to a certain extent.

In some embodiments, the first reinforcing structure is disposed between any two adjacent first ventilation holes. The rigidity of the gap between two adjacent first air holes is generally lower, and the rigidity of the corresponding position of the first air holes in the supporting component can be improved by arranging the first reinforcing structure at each gap, so that the flatness of the supporting component can be improved to a certain extent.

In some embodiments, the support member is further provided with a second reinforcing structure extending along a third direction, where the second reinforcing structure is used to enhance the strength of the support member in the third direction, and the third direction is disposed at an angle with the first direction. The provision of the second reinforcing structure may enhance the rigidity and flatness of the support member in the third direction Z to some extent.

In some embodiments, the second reinforcing structure includes two spaced apart reinforcing portions. The second additional strengthening adopts the structure that this embodiment provided, simple structure, the processing of being convenient for.

In some embodiments, two of the stiffeners are connected by the first stiffener structure. The first reinforcing structure and the second reinforcing structure can be integrally formed, and the rigidity and the flatness of the supporting part can be further improved.

In some embodiments, the first region is provided with the first reinforcing structure along both ends of the support member in the width direction. By adopting the scheme provided by the embodiment, the rigidity of the end part of the first area in the width direction of the supporting part can be enhanced to a certain extent, so that the rigidity and the flatness of the supporting part in the width direction are increased.

In some embodiments, the reinforcement extends in the width direction of the support member to two oppositely disposed sides of the support member and encloses a closed structure with the first reinforcement structure at the end of the first region. By adopting the structure provided by the embodiment, the structure formed by the reinforcing part and the corresponding first reinforcing structure can form an integral structure, so that the reinforcing part and the corresponding first reinforcing structure are convenient to be processed and molded together, and are separated from each other relatively, the rigidity of the reinforcing part and the corresponding first reinforcing structure can be further enhanced, and the planeness of the supporting part is improved.

In some embodiments, a third reinforcing structure connecting the first reinforcing structure and the reinforcing portion is further provided on the first region, the third reinforcing structure being located within the closed structure. The third reinforcing structure is located in the closed structure and connected with the first reinforcing structure and the reinforcing part, so that the supporting strength of the closed structure can be further enhanced, and the planeness of the supporting part can be improved.

In some embodiments, the closed structure has at least one apex angle at which the third reinforcing structure is located. In this embodiment, the third reinforcing structure is disposed at the top corner, so that the supporting strength at the top corner of the closed structure can be improved, and the flatness of the supporting member can be improved.

In some embodiments, the reinforcing portion, the first reinforcing structure and the third reinforcing structure are all bar-shaped structures, and the three structures enclose a triangular structure. The reinforcing part, the first reinforcing structure and the third reinforcing structure are bar-shaped structures, and the structure is simple and convenient to design and process. The three are enclosed into a triangular structure, so that the structure is stable, the supporting strength of the top angle of the closed structure is improved, and the planeness of the supporting part can be improved.

In some embodiments, the area of the first region is greater than the area of the pressure relief region. Compared with the area of the first area equal to the area of the pressure relief area, the first area and the first reinforcing structure provided by the embodiment can enable the area of the first area to be larger than the area of the pressure relief area, and the coverage area of the first reinforcing structure is larger, so that the rigidity of the supporting part can be further enhanced, and the planeness of the supporting part is improved.

In some embodiments, the width of the first region is greater than or equal to the width of the region of the support member corresponding to the pressure relief region along the length of the support member; along the width direction of the supporting component, two ends of the first area respectively extend to two opposite side surfaces in the supporting component. The first area in this embodiment spans the support member in the width direction of the support member, and with this arrangement, the area of the first area can be made larger, and the coverage area of the first reinforcing structure is made larger, so that the rigidity of the support member can be further enhanced, and the flatness of the support member can be improved.

In some embodiments, the first vent is located in an area of the first area corresponding to the pressure relief area. The first bleeder vent is arranged in the region corresponding to the pressure relief region in the first region, can be closer to the pressure relief region, namely, is closer to the explosion-proof valve, so that when the air pressure in the shell is higher, the gas on the electrode assembly side can quickly reach the explosion-proof valve through the first bleeder vent, and the pressure relief speed of the battery is higher.

In some embodiments, the supporting member is further provided with a second ventilation hole, the second ventilation hole is communicated with two sides of the thickness direction of the supporting member, and at least part of the second ventilation hole is located in the first area. When the air pressure in the shell is higher, the air at the side of the electrode assembly can quickly reach the pressure release area through the first air holes and the second air holes, so that the pressure release speed of the battery cell is higher.

In some embodiments, the cross-sectional area of the second vent is smaller than the cross-sectional area of the first vent. Because the first bleeder vent is located the position that is close to the pressure release district, is main exhaust passage, and the second bleeder vent is auxiliary exhaust passage, and the cross sectional area of second bleeder vent is less than the cross sectional area of first bleeder vent, can make the rigidity influence of second bleeder vent to supporting part less to make supporting part's rigidity can maintain in predetermineeing the within range, make supporting part's planarization higher.

In some embodiments, the first reinforcement structure is located on a side of the support member adjacent to the first wall and abuts the first wall, and the support member abuts the main body portion of the electrode assembly. By adopting the scheme provided by the embodiment, the supporting function and the limiting function of the supporting component on the electrode assembly can be enhanced to a certain extent, so that the electrode assembly is not easy to shake after being assembled, the risk of hard collision between the electrode assembly and the shell can be reduced to a certain extent, and the stability of the service performance of the battery can be improved.

In some embodiments, the first wall is an end cap of the housing. The first wall is an end cover of the shell, so that the processing of the weak part and the installation of the explosion-proof valve are facilitated.

In some embodiments, the battery cell includes an insulating member, the insulating member is located between the first wall and the supporting member, a gas accommodating groove is provided in a region corresponding to the pressure relief area, the bottom of the gas accommodating groove protrudes toward the supporting member, and the first reinforcing structure abuts against the outer wall of the gas accommodating groove. The battery monomer adopts the structure that this embodiment provided, simple structure, the equipment of being convenient for, and can satisfy the use needs, and simultaneously supporting part can form stable contact with insulating part, and can carry out better spacing to electrode assembly, reduces its risk of taking place to rock, and can reduce the electrode assembly and invert the time and take place the risk of hard collision with supporting part, can improve battery performance's stability to a certain extent.

In some embodiments, the support member is a single piece. The support component adopts an integral piece to assemble with a plurality of pieces, has a simplified structure and high overall performance, ensures that the support component has a stable structure and is convenient to process and assemble.

In some embodiments, the support member is an insulator. The support part adopts the insulating part to reduce the risk that the electrode assembly is electrically connected with the shell through the support part, and the reliability of the single battery is improved to a certain extent.

In some embodiments, the support member is a resilient member. The supporting part adopts the elastic piece, can reduce the risk that electrode assembly and supporting part take place hard collision and take place wearing and tearing in the use to can improve the reliability of battery monomer performance to a certain extent.

In a second aspect, an embodiment of the present application provides a battery, including a battery cell provided in any one of the embodiments above. The battery provided by the embodiment of the application comprises the battery monomer according to any scheme, so that the supporting part has higher flatness, and the service performance of the battery is stable.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery provided in any one of the foregoing embodiments. The power utilization device provided by the embodiment of the application comprises the battery according to any scheme, so that the supporting part has higher flatness, and the service performance of the power utilization device is stable.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the application;

Fig. 2 is an exploded view of a battery according to some embodiments of the present application;

Fig. 3 is a schematic exploded view of a battery cell according to some embodiments of the present application;

Fig. 4 is a schematic view showing a partial cross-sectional structure of a battery cell according to some embodiments of the present application;

fig. 5 is a schematic view showing a partial structure of a first wall of a battery cell according to some embodiments of the present application;

fig. 6 is a partial schematic structural view of a support member in a battery cell according to some embodiments of the present application;

fig. 7 is a partial schematic structural view of a support member in a battery cell according to other embodiments of the present application;

fig. 8 is a partial schematic structural view of a support member in a battery cell according to other embodiments of the present application;

Fig. 9 is a partial schematic structural view of a support member in a battery cell according to other embodiments of the present application;

fig. 10 is a partial schematic structural view of a support member in a battery cell according to some embodiments of the present application;

fig. 11 is a schematic structural view of an end cap in a battery cell according to some embodiments of the present application;

fig. 12 is a schematic view of an exploded structure of an end cap in a battery cell according to some embodiments of the present application;

Fig. 13 is a schematic view of a partial cross-sectional structure of an end cap in a battery cell according to some embodiments of the application.

Reference numerals in the specific embodiments are as follows:

1000. A vehicle;

100. a battery; 200. a controller; 300. a motor;

10. A case; 11. a first portion; 12. a second portion;

20. A battery cell; 21. an end cap; 21a, electrode terminals; 22. a housing; 23. an electrode assembly; 23a, pole lugs; 23b, a main body portion; 26. a housing; 26a, a first wall; 26b, weaknesses; 26c, a pressure relief area; 27. an explosion-proof valve; 28. a support member; 29. a first region;

211. A cover plate; 212. an insulating member; 213. a mounting area; 214. a gas accommodating groove; 281. a first ventilation hole; 282. a first reinforcing structure; 283. a second ventilation hole; 284. a second reinforcing structure; 284a, reinforcement; 285. a third reinforcing structure;

X, a first direction; y, the length direction of the supporting component; z, third direction; A. a second direction; B. the width direction of the support member.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The battery cell is the smallest unit constituting the battery. In order to ensure the safety and reliability of the battery cell, a pressure relief area is usually arranged on the housing of the battery cell. When the explosion-proof valve is arranged in the battery cell, the explosion-proof valve is arranged in the pressure relief area, the shell of the battery cell can be directly provided with a notch, and the area surrounded by the notch is the pressure relief area.

Some battery cells may be provided with support members within the housing to define the position of the electrode assembly within the housing and prevent it from shifting within the housing. Because this supporting part generally sets up in same one side of shell with the pressure release district for reduce the adverse effect of supporting part to the exhaust, when for the atmospheric pressure is great in the shell, other can pass the supporting part and reach the region that the pressure release district was located as early as possible to lie in the electrode assembly side, generally can set up the bleeder vent on the supporting part, in order to pass for the gas. And thus the rigidity of the position where the ventilation holes are formed in the support member is made smaller than that of the other positions. And because the supporting part is generally thinner and longer, the common ventilation holes are arranged at the middle part, the rigidity of the middle structure of the supporting part is weaker than that of the two ends, and the supporting part is easy to deform after injection molding, has poorer flatness and is unfavorable for assembly.

In order to alleviate the above problems, the embodiment of the application provides a battery cell, wherein a first ventilation hole and a first reinforcing structure are arranged in a first area, which corresponds to the position of a pressure relief area, in a support part, so that the rigidity of the first area of the support part can be enhanced, the rigidity of the first area of the support part is smaller than the rigidity of other areas, the flatness of the support part can be improved to a certain extent, the use requirement is met, and the support part is not easy to deform after being molded, and is convenient to assemble.

The battery cell disclosed by the embodiment of the application can be used for an electric device using a battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like. In some cases, the battery cells may also be directly loaded without a case or housing, i.e., without forming a battery pack, with the structure of the vehicle body itself serving as a fixed structure of the battery cells.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 20 according to some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 generally includes a housing 26, an electrode assembly 23, and other functional components. Wherein the housing 26 is a closed structure that forms the internal environment of the battery cell 20, and generally includes the end cap 21 and the housing 22. The housing 22 and the end cap 21 may be two separate members, and an opening may be provided in the housing 22, and the housing may be formed by closing the end cap 21 at the opening. The housing 26 may be, but not limited to, an integral structure, i.e., the end cap 21 and the housing 22 are integral, specifically, the end cap 21 and the housing 22 may form a common connection surface before other components are put into the housing, and when the interior of the housing 22 needs to be sealed, the end cap 21 is covered with the housing 22.

The end cap 21 refers to a member that is covered at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 22 to fit the housing 22. Alternatively, the end cap 21 may be made of a material having a certain hardness and strength, such as an aluminum alloy, so that the end cap 21 is not easily deformed when being extruded and collided, so that the battery cell 20 can have a higher structural strength, and the safety performance can be improved. The end cap 21 may be provided with a functional member such as an electrode terminal 21 a. The electrode terminal 21a may be used to be electrically connected with the electrode assembly 23 for outputting or inputting electric power of the battery cell 20. In some embodiments, the end cap 21 may also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 21, which may be used to isolate electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The case 22 is an assembly for cooperating with the end cap 21 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to accommodate the electrode assembly 23, the electrolyte, and other components. The housing 22 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 22 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 may be contained within the housing 22. The electrode assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode sheets having the active material layer constitute the main body portion 23b of the electrode assembly 23, and the portions of the positive and negative electrode sheets having no active material layer constitute the tab 23a, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion 23b together or at both ends of the main body portion 23 b. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

According to some embodiments of the present application, referring to fig. 3 and 4, a battery cell 20 is provided. The battery cell 20 includes a case 26, an electrode assembly 23, and a support member 28.

The housing 26 has a first wall 26a. The first wall 26a is provided with a weak portion 26b and a pressure relief area 26c, and the area covered or surrounded by the weak portion 26b is the pressure relief area 26c. The electrode assembly 23 is disposed within the housing 26. The support member 28 is provided in the case 26 between the first wall 26a and the main body portion 23b of the electrode assembly 23. The support member 28 has a first region 29 that corresponds at least in part to the location of the relief zone 26c. The first region 29 is provided with a first ventilation hole 281 and a first reinforcing structure 282. The first ventilation holes 281 communicate with both sides of the supporting member 28 in the thickness direction. The first reinforcing structure 282 is used to strengthen the strength at the first region 29.

As previously described, the housing 26 is a closed structure that is used to create the internal environment of the battery cell 20 and generally includes the end cap 21 and the housing 22. The housing 22 and the end cap 21 may be two independent components or may be an integrated structure, which is not described herein. Wherein the housing 22 generally has a plurality of side walls and a bottom wall, and the end caps are generally single plates or composite plates having a certain thickness. The first wall 26a may be a side wall of the housing 22 or a bottom wall of the housing 22, or may be an end cover, and may be specifically set according to the use requirement.

In addition to the case 26, the electrode assembly 23 and the support member 28, some battery cells 20 are provided with an explosion-proof valve 27 on the case 26. In this case, in order to mount the explosion-proof valve 27, a through hole is generally formed in the case 26, and the explosion-proof valve 27 is mounted in the through hole or at the outer end of the through hole, and the region where the through hole for mounting the explosion-proof valve 27 is located is the weak portion 26b and the pressure relief region 26c. In other embodiments, the battery unit 20 may not be provided with an additional explosion-proof valve 27 on the housing 26, but a notch is provided on the housing 26, and when the air pressure in the housing 26 is high, the air can break through the notch to realize pressure relief, and the part where the notch is located is a weak portion 26b, and the area surrounded by the notch is a pressure relief area 26c.

Therefore, the area covered or surrounded by the weak portion 26b is the pressure relief area 26c, and as shown in fig. 4, when the weak portion 26b is a through hole, the pressure relief area 26c is the area where the weak portion 26b is located, and is also the area covered by the weak portion 26b, according to the arrangement mode of the weak portion 26 b; as shown in fig. 5, when the weakened portion 26b has a bar-shaped structure such as a score, the pressure release area 26c is an area surrounded by the weakened portion 26 b.

As described above, the main body portion 23b of the electrode assembly 23 is a portion of the electrode assembly 23 including the positive electrode sheet having the active material layer and the negative electrode sheet having the active material layer, and is also a portion of the electrode assembly 23 excluding the tab 23 a.

The at least partial correspondence in position means that the position of at least a part of the first region 29 corresponds to the position of at least a part of the relief region 26 c.

The first ventilation holes 281 may be holes, microporous structures, openings, etc. formed on the supporting member 28, and may be specifically determined according to the use requirement. The first ventilation holes 281 communicating with both sides of the thickness direction of the support member 28 means that the first ventilation holes 281 are through holes penetrating the support member 28 in the thickness direction of the support member 28. Through the first ventilation holes 281, the gas at the side of the body part 23b of the electrode assembly 23 may flow into the space between the support member 28 and the first wall 26 a.

The first reinforcing structure 282 may be a reinforcing rib, a reinforcing block, or the like protruding from the surface of the first region 29, or may be a fiber, a composite material, or the like disposed in a corresponding portion of the first region 29, or may be other structures, specifically, may be determined according to the use requirement, so long as the structure can increase the strength and rigidity of the supporting member 28.

According to the battery cell 20 provided by the embodiment of the application, the first ventilation holes 281 and the first reinforcing structures 282 are arranged in the first region 29 of the supporting component 28, which corresponds to the pressure release region 26c at least partially, so that the rigidity of the first region 29 can be enhanced, the rigidity of the first region 29 of the supporting component 28 is smaller than that of other regions, the flatness of the supporting component 28 can be improved to a certain extent, the use requirement is met, and the supporting component 28 is not easy to deform after being molded, so that the assembly is convenient.

In some embodiments, at least a portion of the first reinforcing structure 282 is located in an area of the first region 29 that corresponds to the location of the pressure relief region 26 c.

At least a portion of the first reinforcing structure 282 is located in the first region 29 in a region corresponding to the location of the relief region 26c, including: first, a part of the first reinforcing structure 282 is located in a region corresponding to the pressure release region 26c in the first region 29, and the other part is located in other regions of the first region 29; second, the entirety of the first reinforcing structure 282 is located in the first region 29 in a region corresponding to the location of the relief region 26 c.

Because the first ventilation holes 281 generally correspond to the pressure relief area 26c or are disposed adjacent to the pressure relief area 26c, at least a portion of the first reinforcing structure 282 is located in the area of the first area 29 corresponding to the pressure relief area 26c, so that at least a portion of the first reinforcing structure 282 is disposed adjacent to the first ventilation holes 281, and therefore, the rigidity of the support member 28 at the position where the first ventilation holes 281 are formed can be enhanced to a certain extent, and the flatness of the support member 28 can be improved.

In some embodiments, all of the first reinforcing structure 282 is located in the first region 29 in a region corresponding to the location of the pressure relief region 26 c.

As described above, the first ventilation holes 281 generally correspond to the pressure relief area 26c, or are disposed adjacent to the pressure relief area 26c, and all of the first reinforcing structures 282 are located in the area of the first area 29 corresponding to the pressure relief area 26c, so that the first reinforcing structures 282 are disposed adjacent to the first ventilation holes 281, thereby enhancing the rigidity of the support member 28 at the position where the first ventilation holes 281 are provided to a certain extent, and further enhancing the flatness of the support member 28.

As shown in fig. 6, in some embodiments, at least a portion of the first reinforcing structure 282 extends along a first direction X that is parallel to the length of the support member 28 or disposed at an acute angle to the length of the support member 28.

The first reinforcing structure 282 may be a regular shape or an irregular shape, and when the first reinforcing structure 282 is a regular shape, it may be a long strip structure, a rectangle, or the like, or it may be a triangle, a five-pointed star, or the like, which may be specifically determined according to the use requirement.

Extending at least part of the first reinforcing structure 282 along the first direction X includes: first, all of the first reinforcing structures 282 extend along the first direction X, and the first reinforcing structures 282 may be elongated structures; second, a portion of the first reinforcing structure 282 extends along the first direction X, and other portions extend along other directions, for example, the first reinforcing structure 282 may be triangular, five-pointed, etc., and only one protruding portion of the first reinforcing structure 282 may extend along the first direction X, and other portions may extend along another same direction or different directions.

Since the first ventilation holes 281 generally enable the two ends of the supporting member 28 in the length direction to tilt, the first reinforcing structure 282 extends at least partially along the first direction X to enhance the rigidity of the supporting member 28 in the length direction, so as to improve the flatness of the supporting member 28 to a certain extent.

As shown in fig. 6, in some embodiments, the first reinforcing structure 282 comprises a bar-shaped structure extending along the first direction X.

By bar-shaped structures is meant that the structure has a dimension in the first direction X that is significantly larger than its dimension in the other direction, e.g. the structure has a dimension in the first direction X that is 10 times, 20 times or other multiple of the dimension in the other direction.

The first reinforcing structure 282 adopts the structure provided in this embodiment, and has a simple structure and is convenient to prepare.

As shown in fig. 6, in some embodiments, the first ventilation holes 281 are provided in plurality. At least two adjacent first ventilation holes 281 are provided with a first reinforcing structure 282.

Plural means greater than or equal to two. In this embodiment, a gap exists between any two adjacent first ventilation holes 281. At least two of the first reinforcement structures 282 disposed between two adjacent first ventilation holes 281 include the following cases: first, only one gap is provided with a first reinforcing structure 282; the second, n gaps are all provided with the first reinforcing structures 282, n is smaller than the total number of the gaps, namely, is smaller than the total number of the first ventilation holes 281 minus a value corresponding to 1; third, all gaps are provided with a first reinforcing structure 282.

Since the rigidity at the gap between the adjacent two first ventilation holes 281 is generally low, the first reinforcement structure 282 is provided at the location where the rigidity can be improved, so that the flatness of the support member 28 can be improved to some extent.

As shown in fig. 6, in some embodiments, a first reinforcing structure 282 is disposed between any two adjacent first ventilation holes 281.

As described above, the rigidity of the gaps between two adjacent first ventilation holes 281 is generally low, and the first reinforcing structures 282 disposed at each gap can improve the rigidity of the corresponding positions of the first ventilation holes 281 in the support member 28, so as to improve the flatness of the support member 28 to some extent.

As shown in fig. 7, in some embodiments, the support member 28 is further provided with a second reinforcing structure 284 extending in the third direction Z. The second reinforcing structure 284 is used to enhance the strength of the support member 28 in a third direction Z disposed at an angle to the first direction X.

The second reinforcing structure 284 may be a reinforcing rib, a reinforcing block, or the like protruding from the surface of the first region 29, may be a fiber, a composite material, or the like disposed in a corresponding portion of the first region 29, or may be other structures, particularly as required, so long as the structure can increase the rigidity of the support member 28. The second reinforcing structure 284 may be regular or irregular in shape, as may be desired for use. The structure and shape of the second reinforcing structure 284 may be the same as or different from the structure and shape of the first reinforcing structure 282, and may be specifically determined according to the use requirement.

The arrangement of the included angle means that the included angle is non-zero, and the third direction Z is not parallel to the first direction X.

The provision of the second reinforcement structure 284 may enhance the rigidity and flatness of the support member 28 in the third direction Z to some extent.

As shown in fig. 7, in some embodiments, the second reinforcing structure 284 includes two spaced apart reinforcing portions 284a.

The reinforcement 284a is a member that can increase the rigidity of the support member 28, and may be a reinforcing rib, a reinforcing block, or the like. The spacing means that there is a gap between the two reinforcing portions 284 a.

The second reinforcing structure 284 adopts the structure provided by the embodiment, and has simple structure and convenient processing.

As shown in fig. 7, in some embodiments, two reinforcements 284a are connected by a first reinforcement structure 282.

Thus, the first reinforcing structure 282 and the second reinforcing structure 284 may be integrally formed, and the rigidity and flatness of the support member 28 may be further improved.

As shown in fig. 8, in some embodiments, the first region 29 is provided with first reinforcing structures 282 along both ends of the support member 28 in the width direction B.

Both ends of the first region 29 in the width direction B of the support member 28 refer to both ends of the first region 29 in the width direction of the support member 28.

With the arrangement provided by the present embodiment, the rigidity of the end portion of the first region 29 in the width direction of the support member 28 can be enhanced to some extent, thereby increasing the rigidity and flatness of the support member 28 in the width direction.

As shown in fig. 7, in some embodiments, the reinforcement 284a extends along the width direction B of the support member 28 to two oppositely disposed sides of the support member 28 and encloses a closed structure with the first reinforcement structure 282 at the end of the first region 29.

The two oppositely disposed sides in the present embodiment refer to the two oppositely disposed sides of the supporting member 28 in the width direction.

The first reinforcing structure 282 located at the end of the first region 29 refers to the first reinforcing structure 282 located at the end of the first region 29 in the width direction of the support member 28. The closed structure means that the side wall of the cavity enclosed by the connection between the reinforcement 284a and the first reinforcement 282 has no opening.

By adopting the structure provided by the embodiment, the structure formed by the reinforcing part 284a and the corresponding first reinforcing structure 282 can form an integral structure, so that the reinforcing part 284a and the corresponding first reinforcing structure 282 are convenient to be processed and molded together, and are arranged separately relative to each other, so that the rigidity of the reinforcing part 284a and the corresponding first reinforcing structure 282 can be further enhanced, and the flatness of the supporting part 28 can be improved.

As shown in fig. 9, in some embodiments, a third reinforcing structure 285 is further provided on the first region 29 to connect the first reinforcing structure 282 and the reinforcing portion 284a, and the third reinforcing structure 285 is located within the closed structure.

The third reinforcing structure 285 may be a reinforcing rib, a reinforcing block, or the like protruding from the surface of the first region 29, may be a fiber, a composite material, or the like disposed in a corresponding portion of the first region 29, or may be other structures, specifically, may be determined according to the use requirement, as long as the structure can increase the rigidity of the supporting member 28. The third reinforcing structure 285 may be regular or irregular in shape, and may be specific to the needs of use. The structure and shape of the third reinforcement structure 285 may be the same as or different from the structure and shape of the first reinforcement structure 282, and may be specifically determined according to the use requirement.

The third reinforcement structure 285 is positioned within the closed structure and is connected to the first reinforcement structure 282 and the reinforcement 284a, so that the supporting strength of the closed structure can be further enhanced, and thus the flatness of the supporting member 28 can be improved.

As shown in fig. 9, in some embodiments, the enclosed structure has at least one apex angle at which a third reinforcing structure 285 is located.

Since the first reinforcing structure 282 and the reinforcing portion 284a have various arrangements, the closed structure may have various arrangements, such as a ring structure, a rectangular structure, an irregular structure, etc. For closed structures with top corners, stress concentration is easy to occur at the top corners. The third reinforcing structure 285 is provided at the top corner in this embodiment, so that the supporting strength at the top corner of the closed structure can be improved, and thus the flatness of the supporting member 28 can be improved.

As shown in fig. 9, in some embodiments, the reinforcing portion 284a, the first reinforcing structure 282 and the third reinforcing structure 285 are each in a strip-shaped structure, and the three enclose a triangular structure.

The reinforcing portion 284a, the first reinforcing structure 282 and the third reinforcing structure 285 are bar-shaped structures, and are simple in structure and convenient to design and process. The three enclose a triangular structure, and the structure is stable, so that the supporting strength at the top angle of the closed structure can be improved, and the flatness of the supporting part 28 can be improved.

In some embodiments, the area of the first region 29 is greater than the area of the relief region 26 c.

The area of the first region 29 being larger than the area of the pressure relief region 26c means that the first region 29 includes not only a region corresponding to the position of the pressure relief region 26c and having an equivalent area but also other regions connected to the above-mentioned region. The location and area of the other regions may be determined according to the use requirements and are not limited solely herein.

Compared with the area of the first region 29 being equal to the area of the pressure relief region 26c, the first region 29 and the first reinforcing structure 282 provided in this embodiment can make the area of the first region 29 larger than the area of the pressure relief region 26c, and the coverage area of the first reinforcing structure 282 larger, so that the rigidity of the supporting member 28 can be further enhanced, and the flatness of the supporting member 28 can be improved.

In some embodiments, the width of the first region 29 along the length Y of the support member 28 is greater than or equal to the width of the region of the support member 28 corresponding to the relief region 26 c;

The both ends of the first region 29 extend to the opposite side surfaces of the support member 28 in the width direction B of the support member 28, respectively.

The support member 28 is generally a three-dimensional structure having a longitudinal direction, a width direction, and a thickness direction, and the dimension in the longitudinal direction is generally greater than the dimension in the width direction. The above-described two side surfaces extending to the opposite sides of the support member 28 refer to two side surfaces extending to the support member 28 in the width direction.

The width of the first region 29 refers to the dimension of the first region 29 in the length direction of the support member 28.

The region of the support member 28 corresponding to the relief region 26c is a region of the support member 28 that is disposed opposite the relief region 26c, and has the same area and the same shape. The width of the region of the support member 28 corresponding to the relief region 26c refers to the dimension of the region of the support member 28 corresponding to the relief region 26c in the length direction of the support member 28.

With this arrangement, the first region 29 in the present embodiment spans the support member 28 in the width direction of the support member 28, so that the area of the first region 29 is larger and the coverage area of the first reinforcing structure 282 is larger, thereby further enhancing the rigidity of the support member 28 and improving the flatness of the support member 28.

In some embodiments, the first ventilation holes 281 are located in the first region 29 corresponding to the position of the pressure release region 26 c.

The first ventilation holes 281 are located in the region corresponding to the pressure relief region 26c in the first region 29, and can be closer to the pressure relief region 26c, that is, closer to the explosion-proof valve 27, so that when the air pressure in the casing 26 is high, the air on the electrode assembly 23 side can quickly reach the explosion-proof valve 27 through the first ventilation holes 281, and the pressure relief speed of the battery is high.

As shown in fig. 10 and 9, in some embodiments, the supporting member 28 is further provided with a second ventilation hole 283. The second ventilation holes 283 communicate with both sides of the supporting member 28 in the thickness direction. At least a portion of the second ventilation hole 283 is located in the first region.

The second vent 283 is a small hole or opening for providing gas permeability in the material or structure. The shape, structure, size, etc. of the second ventilation holes 283 may be the same as or different from the shape, structure, size, etc. of the first ventilation holes 281, and may be specifically set according to the use requirement. The second vent 283 is generally positioned adjacent to the venting area.

When the air pressure in the case is high due to the arrangement of the second ventilation holes 283, the air on the electrode assembly 23 side can quickly reach the pressure release area through the first ventilation holes 281 and the second ventilation holes 283, so that the pressure release speed of the battery cell 20 is faster.

As shown in fig. 10 and 9, in some embodiments, the cross-sectional area of the second vent 283 is smaller than the cross-sectional area of the first vent 281.

The first ventilation holes 281 and the second ventilation holes 283 are through holes penetrating the supporting member 28 in the thickness direction of the supporting member 28.

The cross-sectional area in this embodiment refers to an area of a cross section obtained by cutting the first ventilation holes 281 or the second ventilation holes 283 in a plane perpendicular to the thickness direction of the support portion.

Because the first ventilation hole 281 is located near the pressure relief area and is a main ventilation channel, the second ventilation hole 283 is an auxiliary ventilation channel, and the cross-sectional area of the second ventilation hole 283 is smaller than that of the first ventilation hole 281, the influence of the second ventilation hole 283 on the rigidity of the support member 28 is smaller, so that the rigidity of the support member 28 can be maintained within a preset range, and the flatness of the support member 28 is higher.

As shown in fig. 4, in some embodiments, the first reinforcing structure 282 is located on a side of the support member 28 proximate the first wall 26a and abuts the first wall 26 a. The support member 28 abuts against the main body portion 23b of the electrode assembly 23.

The first reinforcing structure 282 being located on the side of the support member 28 adjacent to the first wall 26a means that the first reinforcing structure 282 is located on the opposite side of the support member 28 from the first wall 26 a. The main body portion 23b of the electrode assembly 23 refers to a main portion of the electrode assembly 23, and is also a portion of the electrode assembly 23 other than the tab 23 a.

Abutting means that the surfaces of two objects are brought together so that they can keep their relative positions unchanged by force. The abutment with the first wall 26a means that the surface of the first reinforcing structure 282 is in contact with the inner wall of the first wall 26a, and the relative position of the two can be maintained under the action of force without great change. The abutment of the support member 28 with the main body portion 23b of the electrode assembly 23 means that the surface of the support member 28 is in contact with the main body portion 23b of the electrode assembly 23, and the relative positions of the two can be maintained under the action of force without significant change.

By adopting the scheme provided by the embodiment, the supporting function and the limiting function of the supporting part 28 on the electrode assembly 23 can be enhanced to a certain extent, so that the electrode assembly 23 is not easy to shake after being assembled, and the risk of hard collision between the electrode assembly 23 and the shell 26 can be reduced to a certain extent, so that the stability of the service performance of the battery 100 is improved.

In some embodiments, the first wall 26a is an end cap 21 of the housing 26.

As described above, the end cap 21 may be a separate member or may be a member at least partially separated from the housing 22 in the initial state. The initial state refers to a state before the end cap is not sealingly connected to the housing 26. The first wall 26a is an end cap of the housing 26 to facilitate the processing of the frangible portion and the installation of the explosion proof valve 27.

As shown in fig. 12 and 13, in some embodiments, the battery cell 20 includes an insulating member 212. The insulating member 212 is located between the first wall 26a and the support member 28. The insulating member 212 is provided with a gas accommodating groove 214 in a region corresponding to the pressure relief region, the bottom of the gas accommodating groove 214 protrudes toward the supporting member 28, and the first reinforcing structure 282 abuts against the outer wall of the gas accommodating groove 214.

The insulating member 212 refers to a member for isolating current conduction, and its main function is to prevent current conduction in an undesired direction, and is typically made of an insulating material such as plastic, rubber, or the like. At the same time, the insulating member 212 also generally has a certain elasticity.

The fact that the gas accommodating groove 214 is formed in the region corresponding to the pressure relief region position of the insulating part 212 means that the gas accommodating groove 214 is formed in the region corresponding to the pressure relief region position of the insulating part 212, a space for accommodating gas exists between the bottom surface of the gas accommodating groove 214 and the surface of the pressure relief region, and the size of the space is determined according to design requirements.

The first reinforcing structure 282 abuts against the outer wall of the gas accommodating groove 214, so that the supporting function of the supporting member 28 can be enhanced to some extent, and the risk of shaking of the electrode assembly 23 in the case 26 can be reduced.

The battery monomer 20 adopts the structure that this embodiment provided, simple structure, the equipment of being convenient for, and can satisfy the use needs, and simultaneously the supporting part 28 can form stable contact with insulating part 212, and can carry out better spacing to electrode assembly 23, reduces its risk of taking place to rock, and can reduce the risk of taking place hard collision with supporting part 28 when electrode assembly 23 inverts, can improve battery 100 performance's stability to a certain extent.

In some embodiments, the support member 28 is a single piece.

The integral piece can be a single piece body manufactured through an integral molding process, or can be a single piece body formed by combining a plurality of parts or components. The support member 28 has a simplified structure and improved overall performance compared to a multi-piece assembly using an integral piece, resulting in a stable structure of the support member 28 for ease of processing and assembly.

In some embodiments, the support member 28 is an insulator. An insulator means a component for isolating the conduction of electric current, the main function of which is to prevent the conduction of electric current in unwanted directions, and is usually made of an insulating material such as plastic, rubber, etc.

The use of the insulating member for the support member 28 can reduce the risk of the electrode assembly 23 being electrically connected to the case 26 through the support member 28, and improve the reliability of use of the battery cell 20 to some extent.

In some embodiments, the support member 28 is a resilient member.

An elastic member is a mechanical member having elastic deformation characteristics, and is generally made of an elastic material such as rubber or polymer. The support member 28 is an elastic member, and the support member 28 is capable of being reversibly elastically deformed when subjected to an external force, and is substantially restored to its original shape after the external force is removed. Such elastic deformation may be used to store and release energy, provide cushioning and dampening functions, adjust and maintain force and displacement relationships between components, and the like. The above-mentioned restoration to the original shape means that the supporting member 28 may be restored to the original state in all or a half of the regions after the external force is removed, or the aberration between the restored state and the original state is not large, for example, the thickness of a certain region is a before the supporting member 28 receives the external force, and after the external force is removed again, the thickness of the region becomes a1, a1-a is less than or equal to a b, and b may be any ratio of more than 0 and less than or equal to 20%, or may be other ratio, and may be specific according to the use requirement.

The support member 28 is an elastic member, so that the risk of abrasion caused by hard collision between the electrode assembly 23 and the support member 28 during use can be reduced, and the reliability of the service performance of the battery cell 20 can be improved to a certain extent.

According to some embodiments of the application, the application further provides a battery, including the battery cell according to any of the above schemes.

The battery provided by the embodiment of the application comprises the battery monomer according to any scheme, so that the supporting part has higher flatness, and the service performance of the battery is stable.

According to some embodiments of the application, the application further provides an electric device, including a battery according to any of the above schemes. The battery is used for providing electric energy for the electric device.

The powered device may be any of the aforementioned devices or systems employing batteries.

The power utilization device provided by the embodiment of the application comprises the battery according to any scheme, so that the supporting part has higher flatness, and the service performance of the power utilization device is stable.

As shown in fig. 3 to 13, according to some embodiments of the present application, a battery cell 20 is provided. The battery cell 20 includes a case 26, an electrode assembly 23, and a support member 28.

The housing 26 has a first wall 26a. The first wall 26a is provided with a weak portion 26b and a pressure relief area 26c, and the area covered or surrounded by the weak portion 26b is the pressure relief area 26c. The electrode assembly 23 is disposed within the housing 26. The support member 28 is provided in the case 26 between the first wall 26a and the main body portion 23b of the electrode assembly 23. The support member 28 has a first region 29 that corresponds at least in part to the location of the relief zone 26c. The first region 29 is provided with a first ventilation hole 281 and a first reinforcing structure 282. The first ventilation holes 281 communicate with both sides of the supporting member 28 in the thickness direction. The first reinforcing structure 282 is used to strengthen the first region 29.

All of the first reinforcing structure 282 is located in the first region 29 in a region corresponding to the location of the relief region 26 c. The first reinforcing structure 282 includes a bar-shaped structure extending along the first direction X.

The first ventilation holes 281 are provided in plurality. A first reinforcing structure 282 is disposed between any two adjacent first ventilation holes 281.

The support member 28 is further provided with a second reinforcing structure 284 extending in the third direction Z. The second reinforcing structure 284 is used for reinforcing the strength of the supporting member 28 in a third direction Z, which is disposed at an angle to the first direction X and parallel to the width direction B of the supporting member 28.

The second reinforcing structure 284 includes two reinforcing portions 284a disposed at intervals. The reinforcement 284a is a bar-shaped structure extending in the width direction B of the support member 28. The first region 29 is provided with first reinforcing structures 282 at both ends in the width direction B of the support member 28. The reinforcement 284a extends in the width direction B of the support member 28 to two oppositely disposed sides of the support member 28 and encloses a closed structure with the first reinforcement structure 282 at the end of the first region 29.

The area of the first region 29 is larger than the area of the relief region 26 c. The width of the first region 29 is greater than or equal to the width of the region of the support member 28 corresponding to the relief region 26c along the length direction Y of the support member 28; the both ends of the first region 29 extend to the opposite side surfaces of the support member 28 in the width direction B of the support member 28, respectively.

The first ventilation holes 281 are located in the first region 29 corresponding to the pressure release region 26 c. The support member 28 is further provided with a second ventilation hole 283. The second ventilation holes 283 communicate with both sides of the supporting member 28 in the thickness direction. At least a portion of the second ventilation hole 283 is located in the first region. The cross-sectional area of the second airing hole 283 is smaller than that of the first airing hole 281. The second ventilation holes 283 are provided with two groups, which are respectively arranged at two sides of the first ventilation holes 281. Each set of second ventilation holes 283 is provided with a plurality of second ventilation holes 283.

The first wall 26a is an end cap 21 of the housing 26. The battery cell 20 includes an insulating member 212. The insulating member 212 is located between the first wall 26a and the support member 28. The insulating member 212 is provided with a gas accommodating groove 214 in a region corresponding to the pressure relief region, the bottom of the gas accommodating groove 214 protrudes toward the supporting member 28, and the first reinforcing structure 282 abuts against the outer wall of the gas accommodating groove 214.

The support member 28 is a top bracket, which is an integral plastic piece. The insulating member 212 is a lower plastic, and is an integral plastic member. The first reinforcing structure is a reinforcing rib.

After assembly, the lower plastic explosion-proof valve area boss is spaced from the lower plastic side boss by a distance H1, and the height of the first reinforcing structure on the support member 28 is H2, H1 being equal to H2.

By adopting the scheme provided by the embodiment, the rigidity of the region where the first ventilation holes are formed in the supporting part is equivalent to the rigidity of other regions, so that the flatness of the supporting part meets the use requirement, the supporting part is not easy to deform, and the assembly is convenient.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (30)

1. A battery cell, comprising:

The shell is provided with a first wall, a weak part and a pressure relief area are arranged on the first wall, and the area covered or surrounded by the weak part is the pressure relief area;

An electrode assembly disposed within the housing; and

The support part is arranged in the shell and is positioned between the first wall and the main body part of the electrode assembly, the support part is provided with a first area at least partially corresponding to the pressure relief area, the first area is provided with first ventilation holes and first reinforcing structures, the first ventilation holes are communicated with two sides of the thickness direction of the support part, and the first reinforcing structures are used for reinforcing the strength of the first area.

2. The battery cell of claim 1, wherein at least a portion of the first reinforcement structure is located in a region of the first region that corresponds to the location of the relief region.

3. The battery cell of claim 1, wherein all of the first reinforcement structure is located in a region of the first region corresponding to the location of the relief region.

4. The battery cell of claim 1, wherein a plurality of first vent holes are provided, and wherein the first reinforcement structure is provided between at least two adjacent first vent holes.

5. The battery cell as defined in claim 4, wherein the first reinforcing structure is disposed between any two adjacent first ventilation holes.

6. The battery cell of claim 1, wherein at least a portion of the first reinforcement structure extends in a first direction that is parallel to or disposed at an acute angle to a length direction of the support member.

7. The battery cell of claim 6, wherein the first reinforcement structure comprises a bar-shaped structure extending along the first direction.

8. The battery cell of claim 6, wherein a plurality of first vent holes are provided, and wherein the first reinforcement structure is provided between at least two adjacent first vent holes.

9. The battery cell as recited in claim 8, wherein the first reinforcing structure is disposed between any two adjacent first vent holes.

10. The battery cell of any one of claims 6-9, wherein the support member is further provided with a second reinforcing structure extending along a third direction, the second reinforcing structure configured to enhance the strength of the support member in the third direction, the third direction being disposed at an angle to the first direction.

11. The battery cell of claim 10, wherein the second reinforcement structure comprises two spaced apart reinforcements.

12. The battery cell of claim 11, wherein two of the reinforcement sections are connected by the first reinforcement structure.

13. The battery cell as defined in claim 11, wherein the first region is provided with the first reinforcing structure at both ends in the width direction of the support member.

14. The battery cell as recited in claim 13, wherein the reinforcement extends in a width direction of the support member to two oppositely disposed sides of the support member and encloses a closed structure with the first reinforcement structure at an end of the first region.

15. The battery cell of claim 14, wherein a third reinforcing structure is further provided on the first region that connects the first reinforcing structure and the reinforcing portion, the third reinforcing structure being located within the enclosed structure.

16. The battery cell of claim 15, wherein the enclosure structure has at least one top corner, and the third reinforcing structure is located at the top corner.

17. The battery cell of claim 15 or 16, wherein the reinforcement, the first reinforcement structure, and the third reinforcement structure are each in a bar-shaped structure, and form a triangular structure.

18. The battery cell of any one of claims 1-9, wherein the first region has an area greater than an area of the pressure relief region.

19. The battery cell according to any one of claims 1 to 9, wherein a width of the first region is greater than or equal to a width of a region of the support member corresponding to the pressure release region along a length direction of the support member;

Along the width direction of the supporting component, two ends of the first area respectively extend to two opposite side surfaces in the supporting component.

20. The battery cell of any one of claims 1-9, wherein the first vent is located in a region of the first region corresponding to the location of the pressure relief region.

21. The battery cell as recited in any one of claims 1-9, wherein the support member is further provided with a second vent hole, the second vent hole being in communication with both sides of the support member in a thickness direction thereof, and at least a portion of the second vent hole being located in the first region.

22. The battery cell of claim 21, wherein the second vent has a cross-sectional area that is smaller than the cross-sectional area of the first vent.

23. The battery cell of any one of claims 1-9, wherein the first reinforcement structure is located on a side of the support member adjacent to the first wall and in abutment with the first wall, the support member in abutment with the body portion of the electrode assembly.

24. The battery cell of any one of claims 1-9, wherein the first wall is an end cap of the housing.

25. The battery cell as recited in any one of claims 1-9, wherein the battery cell comprises an insulating member located between the first wall and the support member, a gas accommodating groove is provided in a region of the insulating member corresponding to the pressure relief region, a bottom of the gas accommodating groove protrudes toward the support member, and the first reinforcing structure abuts against an outer wall of the gas accommodating groove.

26. The battery cell of any one of claims 1-9, wherein the support member is a unitary piece.

27. The battery cell of any one of claims 1-9, wherein the support member is an insulator.

28. The battery cell of any one of claims 1-9, wherein the support member is an elastic member.

29. A battery comprising the battery cell of any one of claims 1-28.

30. An electrical device comprising the battery of claim 29.