CN220510173U - Battery cell casing, battery cell, battery and electricity utilization device - Google Patents

Abstract

The application provides a single shell of battery, battery monomer, battery and power consumption device, this single shell of battery include casing and end cover, and the casing is formed with the accommodation space that has the opening, is equipped with the baffle in the accommodation space, and the baffle is connected in the casing and separates accommodation space into two at least holding chambeies that are used for holding electrode assembly, and the end cover lid closes in the opening and is connected with casing and baffle. Because this battery cell's shell can hold two at least electrode assemblies, and the baffle is shared by two at least holding chamber that hold electrode assembly, can reduce this battery cell's shell material and with the connection process of end cover, be favorable to reducing the cost of battery.

Description

Battery cell casing, battery cell, battery and electricity utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer shell, a battery monomer, a battery and an electric device.

Background

The battery has the advantages of high specific energy, high power density and the like, and is widely used in electronic equipment such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy automobiles, electric toy ships, electric toy airplanes, electric tools and the like.

With the increasing range of battery use, how to reduce the cost of batteries is becoming more and more of an interest to those skilled in the art.

Disclosure of Invention

In view of the foregoing, the present application provides a battery cell housing, a battery cell, a battery, and an electric device, where the battery cell housing has a low cost.

In a first aspect, the application provides a battery cell housing, the battery cell housing includes a housing and an end cover, the housing is formed with an accommodation space with an opening, a partition board is arranged in the accommodation space, the partition board is connected to the housing and divides the accommodation space into at least two accommodation cavities for accommodating electrode assemblies, the end cover covers the opening of the accommodation space and is connected with the housing and the partition board, the end cover includes at least two cover parts, the cover parts correspond to the opening of the accommodation cavities, the cover parts are provided with electrode terminals, and the electrode terminals are used for being electrically connected with the electrode assemblies.

Because this battery cell's shell can hold two at least electrode assemblies, and the baffle is shared by two at least holding chamber that hold electrode assembly, can reduce this battery cell's shell material and with the connection process of end cover, be favorable to reducing the cost of battery.

According to the battery cell casing provided by some embodiments of the application, the sealing cover part is provided with the pressure relief hole, and the pressure relief hole is used for communicating the inside and the outside of the cavity, so that the release substance in the cavity can be released through the pressure relief hole.

According to the battery cell casing provided by some embodiments of the present application, the end cover includes a connection structure, the connection structure is disposed between two adjacent cover portions, and the separator is connected to the connection structure.

According to the battery cell casing provided by some embodiments of the application, the connecting structure comprises the connecting hole, the connecting hole penetrates through the end cover along the thickness direction of the end cover, and the partition plate is inserted into the connecting hole and connected with the end cover, so that the partition plate is convenient to connect with the end cover.

According to the battery monomer shell provided by some embodiments of the application, the partition plate is provided with the connecting part, the connecting part is arranged at the end part of the partition plate, which is close to the end cover, and the connecting part is in sealing connection with the connecting hole, so that the partition plate can be in sealing connection with the connecting hole conveniently.

According to the battery monomer shell provided by some embodiments of the application, the inner wall of the connecting hole is provided with the first inclined plane, and the first inclined plane faces the outer side of the accommodating space, so that a first inclined groove can be formed between the first inclined plane and the partition plate, the first inclined groove is convenient to position during welding, a molten pool can be formed during welding to accommodate molten substances, and improvement of welding quality is facilitated.

According to the battery cell casing provided by some embodiments of the application, the opening part of the shell is provided with the connecting surface, the connecting surface is positioned on the inner side of the opening end face of the shell and is wound in the accommodating space, and the end cover is connected to the connecting surface, so that the accommodating space can form a sealing structure.

According to the battery monomer shell provided by some embodiments of the application, the side of the end cover deviating from the accommodation space is flush with the opening end face of the shell, the edge of the end cover is provided with the second inclined plane, and the second inclined plane faces the outer side of the accommodation space, so that a second inclined groove is formed between the second inclined plane and the shell at the opening of the shell, the second inclined groove is convenient for positioning during welding, a molten pool can be formed during welding to accommodate molten substances, and the improvement of welding quality is facilitated.

In a second aspect, some embodiments of the present application further provide a battery cell, where the battery cell includes a housing of the battery cell provided in any one of the foregoing aspects and at least two electrode assemblies, and the at least two electrode assemblies are respectively accommodated in at least two cavities formed by the housing of the battery cell.

In a third aspect, some embodiments of the present application further provide a battery, where the battery includes the battery cell provided by the above technical solution.

In a fourth aspect, some embodiments of the present application further provide an electrical device, where the electrical device includes a battery provided by the foregoing technical solution, and the battery is used to provide electrical energy.

The application provides a single shell of battery, this single shell of battery include casing and end cover, and the casing is formed with the accommodation space that has the opening, is equipped with the baffle in the accommodation space, and the baffle is connected in the casing and separates accommodation space into two at least appearance chambeies that are used for holding electrode assembly, and the end cover lid closes in the opening and is connected with casing and baffle. Because this battery cell's shell can hold two at least electrode assemblies, and the baffle is shared by two at least holding chamber that hold electrode assembly, can reduce this battery cell's shell material and with the connection process of end cover, be favorable to reducing the cost of battery.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

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 figures. In the drawings:

FIG. 1 is a schematic illustration of a vehicle provided in some embodiments of the present application;

FIG. 2 is a split schematic of a battery provided in some embodiments of the present application;

fig. 3 is a schematic diagram of a split structure of a battery cell according to some embodiments of the present disclosure;

fig. 4 is a schematic structural view of an accommodating space formed by a case of a battery cell according to some embodiments of the present application;

FIG. 5 is a schematic structural view of an end cap of a battery cell provided in some embodiments of the present application;

FIG. 6 is a cross-sectional view at A-A in FIG. 3;

fig. 7 is a schematic view of a structure of a battery cell before welding a casing and an end cap according to some embodiments of the present disclosure;

fig. 8 is an enlarged view at B in fig. 7;

fig. 9 is a schematic structural view of a battery cell after welding a housing and an end cap according to some embodiments of the present disclosure;

fig. 10 is an enlarged view at C in fig. 7.

Reference numerals in the specific embodiments are as follows:

1. a vehicle; 2. a battery; 3. a controller; 4. a motor; 5. a case; 51. a first case; 52. a second case; 53. a cavity; 6. a housing; 61. an accommodation space; 611. a cavity; 62. a connection surface; 7. a partition plate; 71. a connection part; 8. an end cap; 81. a cover part; 811. a pressure relief hole; 812. an electrode terminal; 813. a second inclined surface; 8131. a second bevel; 82. a connection structure; 821. a connection hole; 8211. a first inclined surface; 8212. a first bevel; 9. an electrode assembly; 10. and (3) a battery cell.

Detailed Description

Embodiments of the technical solutions 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 solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present application should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements 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.

Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or be integrated; 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 the specific circumstances.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Currently, the more widely the battery is used in view of the development of market situation. The 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, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.

The battery cell may be a secondary battery cell, and the secondary battery cell refers to a battery cell that can activate an active material by charging after discharging the battery cell and continue to use.

The battery cell can be lithium ion battery cell, sodium lithium ion battery cell, lithium metal battery cell, sodium metal battery cell, lithium sulfur battery cell, magnesium ion battery cell, nickel-hydrogen battery cell, nickel-cadmium battery cell, lead storage battery cell, etc.

The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the electrode assembly is a wound structure or a lamination stack. Alternatively, the electrode assembly is a cylindrical rolled structure.

In some embodiments, the battery cell may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like.

As examples, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, including a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, or the like.

In some embodiments, the battery may be a battery module, and when there are a plurality of battery cells, the plurality of battery cells are arranged and fixed to form one battery module.

In some embodiments, the battery may be a battery pack including a case and a battery cell, the battery cell or battery module being housed in the case.

In some embodiments, the tank may be part of the chassis structure of the vehicle. For example, a portion of the tank may become at least a portion of the floor of the vehicle, or a portion of the tank may become at least a portion of the cross member and the side member of the vehicle.

In some embodiments, the battery may be an energy storage device. The energy storage device comprises an energy storage container, an energy storage electric cabinet and the like.

In the related art, in order to improve the tightness of the battery cell, the casing of the battery cell is generally formed into an integral structure by a welded connection method. However, the welding connection mode is long in time and complex in operation, so that the cost of the shell of the battery cell is high, and people in the technical field of batteries pay attention to how to simplify the assembly of the shell of the battery cell to reduce the cost of the shell of the battery cell.

In order to reduce the cost of a battery, the embodiment of the application provides a single shell of the battery, which comprises a shell body and an end cover, wherein the shell body is formed with an accommodating space with an opening, a partition plate is arranged in the accommodating space, the partition plate is connected with the shell body and divides the accommodating space into at least two accommodating cavities for accommodating an electrode assembly, and the end cover covers the opening and is connected with the shell body and the partition plate. Because the single shell of the battery can accommodate at least two electrode assemblies, the separator is shared by at least two accommodating cavities for accommodating the electrode assemblies, the materials of the single shell of the battery and the connecting procedure with the end cover can be reduced, and the manufacturing cost of the single shell of the battery can be reduced.

The housing of the battery cell described in the embodiments of the present application is suitable for a battery and for an electric device using the battery.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

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

Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.

As shown in fig. 1, the interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the present application, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

Fig. 2 is an exploded view of a battery provided in some embodiments of the present application. As shown in fig. 2, the battery 2 includes a case 5 and a battery cell 10, and the battery cell 10 is accommodated in the case 5. Wherein the case 5 is used to provide an accommodation space for the battery cell 10. The number of the battery cells 10 in the battery 2 may be plural, and the plural battery cells 10 may be connected in series or parallel or in series-parallel, and the series-parallel refers to that the plural battery cells 10 are connected in series or parallel. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 10 is accommodated in the box body 5; of course, the battery 2 may be a battery module formed by connecting a plurality of battery cells 10 in series or parallel or series-parallel connection, and a plurality of battery modules are connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 5.

The case 5 may include a first case 51 and a second case 52, and the first case 51 and the second case 52 are covered with each other to define a cavity 53 for receiving the battery cell 10. The first casing 51 and the second casing 52 may be various shapes, such as a rectangular parallelepiped, a cylinder, and the like. The first case 51 may have a hollow structure with one side opened, and the second case 52 may have a hollow structure with one side opened, and the open side of the second case 52 is closed to the open side of the first case 51 to form the case 5 having the cavity 53.

The battery 2 may also include other structures, for example, the battery 2 may also include a bus member for making electrical connection between the plurality of battery cells 10.

Some embodiments of the present application provide a case of a battery cell 10, as shown in fig. 3, the case of the battery cell 10 includes a case 6 and an end cap 8, as shown in fig. 4, the case 6 is formed with a receiving space 61 having an opening, a separator 7 is disposed in the receiving space 61, the separator 7 is connected to the case 6 and divides the receiving space 61 into at least two receiving chambers 611 for receiving the electrode assembly 9, and the end cap 8 is covered on the opening of the receiving space 61 and connected with the case 6 and the separator 7.

The housing 6, the partition 7 and the end cap 8 are respectively different components in the casing, and the two components are mutually connected to form the casing. The housing 6 may be a main body structure in a case, which may be configured as a cylindrical structure having an opening to enclose an accommodating space 61 having an opening. The accommodation space 61 may be used to accommodate other components in the battery cell 10 such as the electrode assembly 9, and substances such as an electrolyte.

The separator 7 may be a member in the case of the battery cell 10, which is disposed in the receiving space 61, for dividing the receiving space 61 into at least two receiving chambers 611, each of which is for receiving the electrode assembly 9. By connecting the separator 7 to the inner wall surface of the receiving space 61 to partition the receiving space 61 into at least two receiving cavities 611, the receiving space 61 formed by the outer case of the battery cell 10 can receive at least two electrode assemblies 9, and the two electrode assemblies 9 located at both sides of the separator 7 share the separator 7 therebetween.

The end cap 8 may be a member for covering the opening of the accommodating space 61, and the covering of the opening can form a sealed space in the accommodating space 61, and form a sealed structure in the outer case of the battery cell 10, which is advantageous in improving the reliability of the battery cell 10. By sealingly connecting the end cap 8 with the housing 6 and the partition 7, the partition 7 is located between the two closed cavities 611 and is shared by the two cavities 611.

In the above structure, since the case of the battery cell 10 can accommodate at least two electrode assemblies 9, and the separator 7 is shared by at least two receiving chambers 611 accommodating the electrode assemblies 9, the materials of the case of the battery cell 10 and the connection process with the end cap 8 can be reduced, which is advantageous in reducing the cost of the battery 2.

In some embodiments, as shown in fig. 5, the end cap 8 includes at least two cover parts 81, the cover parts 81 corresponding to openings of the receiving cavity 611, the cover parts 81 being provided with electrode terminals 812, the electrode terminals 812 being for electrical connection with the electrode assembly 9.

The cover portions 81 may be part of the area on the end cover 8, the end cover 8 covers the opening of the accommodating space 61, the number of the cover portions 81 is equal to the number of the accommodating cavities 611, and the cover portions 81 are correspondingly covered at the openings of the accommodating cavities 611 one by one, so that each accommodating cavity 611 forms an independent closed space.

By providing the electrode terminal 812 on each cap portion 81, the electrode terminal 812 in each cavity 611 can be electrically connected with the electrode terminal 812 on the corresponding cap portion 81, so that the electrode assemblies 9 can be electrically connected with external devices, and the charging or discharging of each electrode assembly 9 is facilitated.

In some embodiments, the cover 81 is provided with a pressure relief hole 811, the pressure relief hole 811 communicating the inside and outside of the cavity 611.

The pressure release hole 811 may be a hole-like structure formed in the cover portion 81, penetrating the cover portion 81 in the thickness direction of the cover portion 81 to communicate the inside and the outside of the cavity 611, so that the release material inside the cavity 611 can be released through the pressure release hole 811.

In some embodiments, the end cap 8 includes a connection structure 82, the connection structure 82 being disposed between two adjacent cap portions 81, the partition 7 being connected to the connection structure 82.

The connection structure 82 may be a structure in the end cap 8 for connection with the partition 7. The connecting structure 82 is arranged between the two adjacent cover parts 81, so that the connecting structure 82 corresponds to the partition 7 positioned between the two adjacent cover parts 81, and the partition 7 is convenient to connect with the connecting structure 82.

Illustratively, the connection structure 82 includes a connection hole 821 penetrating the end cap 8 in the thickness direction of the end cap 8, and the partition 7 is inserted into the connection hole 821 and connected with the end cap 8.

The connection hole 821 may be a hole-like structure provided on the end cover 8, so that the partition 7 can be inserted into the connection hole 821 by making the connection structure 82 include the connection hole 821, so that the connection of the partition 7 and the end cover 8 is facilitated.

For example, the connection hole 821 may be a through hole penetrating the end cap 8 in the thickness direction of the end cap 8, and a portion of the separator 7 may be inserted into the connection hole 821 for temporary positioning and then connected with the end cap 8, and the connection hole 821 of this type allows an operator to connect the separator 7 inserted into the connection hole 821 to the end cap 8 from the outside of the case of the battery cell 10. The connecting hole 821 may be a blind hole with an opening direction facing the accommodating space 61, and a portion of the partition 7 may be inserted into the connecting hole 821 first, and then connected with the end cover 8 after being temporarily positioned, and the connecting hole 821 of this type makes the end cover 8 have a strong sealing property.

In some embodiments, the partition 7 may be connected to the inner wall of the connection hole 821 by welding to achieve connection of the partition 7 with the end cap 8. In other embodiments, the partition 7 may be sealed and adhered to the inner wall of the connection hole 821 by using adhesive, so that the connection between the partition 7 and the end cap 8 is facilitated.

In some embodiments, as shown in fig. 6, the partition 7 is provided with a connection portion 71, the connection portion 71 is provided at an end of the partition 7 near the end cap 8, and the connection portion 71 is sealingly connected in the connection hole 821.

The connecting portion 71 may be a portion of the partition 7 for connecting with the connecting hole 821, and by disposing the connecting portion 71 at an end of the partition 7 near the end cap 8, the connecting portion 71 can be conveniently inserted into the connecting hole 821, so that the partition 7 can be conveniently and sealingly connected to the connecting hole 821.

In some embodiments, the inner wall of the connection hole 821 is provided with a first inclined surface 8211, and the first inclined surface 8211 faces the outer side of the receiving space 61.

The first inclined surface 8211 may be a plane provided on the inner wall surface of the connection hole 821 to intersect the axial direction of the connection hole 821. As shown in fig. 7 and 8, by providing the first inclined surface 8211 on the inner wall surface of the connection hole 821 penetrating the end cap 8 and making the first inclined surface 8211 face the outer side of the accommodation space 61, the first inclined surface 8211 and the partition 7 can form the first inclined surface opening 8212 therebetween, and as shown in fig. 9, the first inclined surface opening 8212 is not only convenient for positioning at the time of welding, but also can form a molten pool to accommodate a molten material at the time of welding, which is advantageous for improving the welding quality. Since the partition 7 is shared by the cavities 611 on both sides thereof, the partition 7 can be hermetically connected to the end cover 8 by only using one weld when being welded to the end cover 8.

For example, the partition 7 may be connected to the end cover 8 by laser welding, so that a good welding quality is provided between the partition 7 and the end cover 8, which is beneficial to improving the connection firmness of the partition 7 and the end cover 8.

In some embodiments, the opening of the housing 6 is provided with a connection surface 62, the connection surface 62 is located inside the opening end surface of the housing 6 and is wound around the accommodating space 61, and the end cover 8 is connected to the connection surface 62.

The connecting surface 62 may be a surface of the housing 6 sealed by the end cover 8, and the connecting surface 62 is disposed at the opening of the housing 6, and the connecting surface 62 is wound around the accommodating space 61, so that the edge portion of the housing 6 around the accommodating space 61 can be connected with the end cover 8, so that the accommodating space 61 can form a sealing structure.

By arranging the connection surface 62 inside the opening end surface of the case 6, the protruding distance of the end cover 8 in the opening direction of the case 6 can be reduced, which is advantageous for not only reducing the size of the battery cell 10 in the opening direction, but also reducing the possibility of collision between external components and the end cover 8.

In some embodiments, the sealing connection between the housing 6 and the end cap 8 may be achieved by welding the end cap 8 and the housing 6 after the end cap 8 is attached to the connection surface 62.

In some embodiments, the side of the end cap 8 facing away from the accommodation space 61 is flush with the open end face of the housing 6, and the edge of the end cap 8 is provided with a second slope 813, the second slope 813 facing towards the outside of the accommodation space 61.

By arranging the side surface of the end cover 8 facing away from the accommodating space 61 to be flush with the opening end surface of the housing 6, the end cover 8 is not easy to protrude from the housing 6, which is not only beneficial to improving the aesthetic property of the outer shell of the battery cell 10, but also beneficial to further reducing the size of the battery cell 10 in the opening direction.

The second slope 813 may be a plane provided on the edge of the end cap 8 to intersect the thickness direction of the end cap 8. By providing the second slope 813 at the edge of the end cap 8 and making the second slope 813 face the outer side of the accommodating space 61 as shown in fig. 10, the second slope 8131 can be formed between the second slope 813 and the housing 6 at the opening of the housing 6, as shown in fig. 9, the second slope 8131 is convenient for positioning during welding, and can form a molten pool to accommodate molten materials during welding, thereby being beneficial to improving welding quality.

Some embodiments of the present application further provide a battery cell 10, where the battery cell 10 includes a housing of the battery cell 10 provided in the foregoing technical solution and at least two electrode assemblies 9, and the at least two electrode assemblies 9 are respectively accommodated in at least two accommodating cavities 611 formed by the housing of the battery cell 10.

Since at least two electrode assemblies 9 in the battery cell 10 are respectively accommodated in at least two accommodating chambers 611 formed by the outer casing of the battery cell 10 provided in the above-mentioned technical scheme, the battery cell 10 has lower cost

Some embodiments of the present application further provide a battery 2, where the battery 2 includes the battery cell 10 provided by the above technical solution.

Some embodiments of the present application further provide an electric device, where the electric device includes the battery 2 provided by any one of the above technical solutions, and the battery 2 is used for providing electric energy.

The powered device may be any of the aforementioned devices or systems employing the battery 2.

According to some embodiments of the present application, there is provided a case of a battery cell 10, the case of the battery cell 10 including a case 6, a separator 7, and an end cap 8, the case 6 forming a receiving space 61 having an opening, the separator 7 being located in the receiving space 61 and dividing the receiving space 61 into at least two receiving chambers 611 for receiving an electrode assembly 9. The end cap 8 covers the opening of the accommodating space 61 and comprises at least two cover portions 81 and a connecting structure 82 positioned between two adjacent cover portions 81, the connecting structure 82 comprises a connecting hole 821 penetrating through the end cap 8, the connecting portion 71 in the partition 7 is inserted into the connecting hole 821 and is in sealing connection with the connecting hole 821, and the cover portions 81 are provided with pressure release holes 811 communicating the inside and the outside of the accommodating cavity 611. The opening part of casing 6 is equipped with connecting surface 62, and connecting surface 62 is located the inboard of the opening terminal surface of casing 6 and around locating accommodation space 61, and end cover 8 laminating is connected in connecting surface 62, and the side that end cover 8 deviates from accommodation space 61 and the opening terminal surface parallel and level of casing 6.

The inner wall of the connection hole 821 is provided with a first inclined surface 8211 facing the outside of the accommodation space 61, and a first inclined surface 8212 capable of functioning as a molten pool at the time of welding is formed between the first inclined surface 8211 and the partition 7. The edge of the end cap 8 is provided with a second slope 813 facing the outside of the accommodating space 61, and a second slope 8131 capable of being used as a molten pool during welding is formed between the second slope 813 and the housing 6.

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 present application has been described in detail with reference to the foregoing embodiments, it should 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 embodiments, and are intended to be included within the scope of the 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 (11)

1. A housing for a battery cell, comprising:

a case formed with an accommodating space having an opening, the accommodating space having a separator provided therein, the separator being connected to the case and dividing the accommodating space into at least two accommodating chambers for accommodating the electrode assemblies;

the end cover is covered on the opening of the accommodating space and is connected with the shell and the partition plate, the end cover comprises at least two cover parts, the cover parts correspond to the opening of the accommodating cavity, the cover parts are provided with electrode terminals, and the electrode terminals are used for being electrically connected with the electrode assembly.

2. The battery cell casing according to claim 1, wherein the cover portion is provided with a pressure release hole that communicates the inside and the outside of the cavity.

3. The battery cell casing of claim 1, wherein the end cap includes a connection structure disposed between adjacent two of the cover portions, the separator being connected to the connection structure.

4. The battery cell casing of claim 3, wherein the connection structure includes a connection hole penetrating the end cap in a thickness direction of the end cap, and the separator is inserted into the connection hole and connected with the end cap.

5. The battery cell casing of claim 4, wherein the separator is provided with a connection portion disposed at an end of the separator adjacent to the end cap, the connection portion being sealingly connected in the connection hole.

6. The battery cell casing of claim 4, wherein the inner wall of the connection hole is provided with a first inclined surface, the first inclined surface facing the outside of the receiving space.

7. The battery cell casing according to claim 1, wherein a connection surface is provided at the opening of the case, the connection surface is located inside the opening end surface of the case and around the accommodating space, and the end cap is connected to the connection surface.

8. The battery cell casing of claim 7, wherein a side of the end cap facing away from the receiving space is flush with the open end face of the housing, and the end cap rim is provided with a second bevel facing outward of the receiving space.

9. A battery cell, comprising:

a casing of a battery cell according to any one of claims 1 to 8;

at least two electrode assemblies are respectively accommodated in at least two accommodating cavities formed by the outer shell of the battery cell.

10. A battery comprising the battery cell of claim 9.

11. An electrical device comprising a battery as claimed in claim 10, said battery being arranged to provide electrical energy.