CN220492166U

CN220492166U - Battery monomer, battery and power consumption device

Info

Publication number: CN220492166U
Application number: CN202323080610.0U
Authority: CN
Inventors: 石胜云; 郭志君; 王鹏; 李川
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-11-15
Filing date: 2023-11-15
Publication date: 2024-02-13
Anticipated expiration: 2033-11-15

Abstract

The application provides a battery monomer, a battery and an electricity utilization device. A battery cell comprising: the shell is provided with an accommodating space, one end of the shell is provided with a first opening, and the first opening is communicated with the accommodating space; the shell is also provided with a second opening which is communicated with the accommodating space; the cover plate is used for being matched and covered on the second opening. Through set up the second opening on the free casing of battery, electrode assembly installs in the casing after, can be through the electrolyte of second opening filling, electrolyte filling speed is fast, and electrolyte can wrap up electrode assembly fast moreover to infiltration electrode assembly promotes infiltration speed, can reduce moreover because of infiltration slow interfacial problem and lead to the risk that battery monomer performance is poor.

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

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

In the production of the battery cell, it is necessary to fill the casing with an electrolyte. The current battery monomer is from annotating liquid Kong Jiazhu electrolyte, and the filling time is long, soaks slowly, influences battery monomer preparation efficiency.

Disclosure of Invention

An objective of the embodiments of the present application is to provide a battery cell, a battery and an electric device, so as to solve the problems of long time for injecting electrolyte and slow infiltration in the related art.

In a first aspect, embodiments of the present application provide a battery cell, including:

the shell is provided with an accommodating space, one end of the shell is provided with a first opening, and the first opening is communicated with the accommodating space; the shell is also provided with a second opening which is communicated with the accommodating space;

an end cap covering the first opening;

the cover plate is used for being matched and covered on the second opening.

In the technical scheme of this embodiment, through set up the second opening on the free casing of battery, electrode assembly installs behind the casing, can be through the electrolyte of second opening filling, and electrolyte filling speed is fast, and electrolyte can wrap up electrode assembly fast moreover to infiltration electrode assembly promotes infiltration speed, can reduce moreover because of infiltration slow interfacial problem and lead to the risk that the monomer performance of battery is poor.

In some embodiments, the second opening is provided at an end of the housing remote from the first opening.

The second opening is arranged on the shell and far away from the first opening, so that electrolyte is convenient to fill, and electrolyte is also convenient to infiltrate the electrode assembly.

In some embodiments, the housing includes two first side walls disposed opposite to each other and two second side walls disposed opposite to each other, the second side walls being adjacent to the first side walls, ends of the second openings extending to outer surfaces of the first side walls, support structures being disposed on the two second side walls, respectively, and adapting structures adapted to be connected with the support structures being disposed on opposite sides of the cover plate, respectively.

Providing a support structure on the second side wall and an adapter structure on a side of the cap plate to support the cap plate on the case through the cooperation of the support structure and the adapter structure, so as to mount the electrode assembly into the case; and the end of the second opening extends to the outer surface of the first side wall so as to mount the cover plate from one side of the shell, thereby facilitating the connection of the supporting structure and the adapting structure.

In some embodiments, the support structure comprises a sliding rail provided on the second side wall, and the adapting structure comprises a sliding groove provided on the cover plate; or the supporting structure comprises a sliding groove arranged on the second side wall, and the adapting structure comprises a sliding rail arranged on the cover plate;

The sliding rail is arranged in the sliding groove in a sliding way.

Through the cooperation of slide rail and spout to insert the second opening with the apron slip, the apron of being convenient for is installed on the casing, and the casing supports the apron.

In some embodiments, the walls of the chute are U-shaped or, alternatively, the walls of the chute are L-shaped.

The sliding rail is arranged in the sliding groove by using the sliding groove with the U-shaped groove wall, so that the sliding rail can be clamped to position the two opposite sides of the cover plate, and the cover plate can be supported conveniently.

The chute with the L-shaped chute wall is used, so that the chute is convenient to process and manufacture, and the cover plate and the shell can be assembled in an adapting way.

In some embodiments, one end of the second opening extends to an outer surface of one first side wall, and the other first side wall is provided with a support plate for supporting a corresponding end of the cover plate.

Extending one end of the second opening to the outer surface of one first side wall so as to insert the cover plate; and a support plate is provided on the other first side wall to support the corresponding end of the cap plate and can be matched with the support structure to more stably support the cap plate, thereby facilitating the installation of the electrode assembly.

In some embodiments, the cover plate is provided with a slot for inserting the support plate; or, the supporting plate is provided with a slot for inserting the corresponding end of the cover plate.

A slot is provided in one of the cover plate or the support plate for insertion of a corresponding end of the other for positioning and supporting the cover plate.

In some embodiments, opposite ends of the second opening extend to outer surfaces of the two first sidewalls, respectively, and each first sidewall abuts against a corresponding end of the cover plate.

Two opposite ends of the second opening extend to the outer surfaces of the two first side walls respectively, and the cover plate can be inserted into the second opening from one of the first side walls, so that the cover plate is convenient to install; the first side wall is abutted against the cover plate so as to be matched with the supporting structure to fix the cover plate.

In some embodiments, one end of the cover plate is provided with a step part, and the step part forms a positioning groove, and the positioning groove corresponds to the first side wall.

Through setting up the step in the one end of apron, insert the opening at the apron, make the one end of apron reach another second lateral wall to make the second lateral wall stretch into the constant head tank, then can fix a position the apron, the installation of apron of being convenient for.

In some embodiments, the end cap or housing is provided with a fill port.

And the end cover or the shell is provided with a liquid injection hole so as to supplement electrolyte and improve the performance of the battery monomer.

In a second aspect, embodiments of the present application provide a battery, including a battery cell as described in the above embodiments.

In a third aspect, embodiments of the present application provide an electrical device including a battery as described in the above embodiments.

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

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required for the description of the embodiments or exemplary techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

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

FIG. 5 is a schematic top view of a housing according to some embodiments of the present application;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is an enlarged view of portion C of FIG. 6;

FIG. 8 is an enlarged view of portion D of FIG. 6;

FIG. 9 is a schematic cross-sectional view taken along line B-B of FIG. 5;

FIG. 10 is an enlarged view of portion E of FIG. 9;

FIG. 11 is a schematic view of a first side wall of a housing mated with a cover plate according to some embodiments of the present disclosure;

FIG. 12 is a schematic view of a support structure coupled to an adapter structure according to some embodiments of the present application;

FIG. 13 is an exploded view of a housing according to further embodiments of the present application;

FIG. 14 is a schematic cross-sectional structural view of a housing according to some embodiments of the present application;

fig. 15 is an exploded view of a battery cell according to some embodiments of the present application;

fig. 16 is an exploded view of a battery cell according to other embodiments of the present application;

FIG. 17 is a schematic cross-sectional structural view of a housing according to some embodiments of the present application;

FIG. 18 is a schematic cross-sectional view of a housing according to further embodiments of the present application;

fig. 19 is a schematic cross-sectional structural view of a housing according to further embodiments of the present application.

Wherein, each reference numeral in the figure mainly marks:

1000-vehicle; 1001-battery; 1002-a controller; 1003-motor;

100-box body; 101-a first part; 102-a second part;

200-battery cells; 10-an electrode assembly; 11-electrode lugs;

20-a housing; 201-a liquid injection hole; 21-a housing; 211-a first end; 212-a second end; 213-a first sidewall; 2131-a support plate; 214-a second sidewall; 2141-a support structure; 2142-extensions; 215-a first opening; 216-a second opening; 217-cover plate; 2171-adaptation structure; 2172-step; 2173-positioning groove; 2174-step; 22-end caps;

31-a transfer sheet; 32-electrode terminals; 33-a pressure release mechanism;

41-sliding rails; 42-sliding grooves; 43-slot;

x-length direction; y-width direction; z-height direction.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit 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 and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. 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. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

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 present 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 any suitable manner.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: 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" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two). The meaning of "a number" is one or more than one unless specifically defined otherwise.

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.

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, when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element unless explicitly stated and limited otherwise. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of embodiments of the present application, the technical term "adjacent" refers to in close proximity unless explicitly specified and defined otherwise. For example A ₁ 、A ₂ And three parts B, A ₁ Distance from B is greater than A ₂ Distance from B, then A ₂ Comparative A ₁ For A ₂ Closer to B, i.e. A ₂ Adjacent to B, also known as B adjacent to A ₂ . For another example, when there are a plurality of C-parts, the C-parts are C ₁ 、C ₂ ……C _N When one of the C-parts, e.g. C ₂ Closer to the B-component than to the other C-components, then B is adjacent to C ₂ C can also be said to be ₂ Adjacent B.

In the embodiment of the application, the step-shaped refers to a shape or structure which takes a step-up or step-down form and is similar to the characteristic shape of a step.

The battery cell in the embodiment of the application includes, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, and the like. The shape of the battery cell includes, but is not limited to, a cylinder, a flat body, a rectangular parallelepiped, or other shape, etc. The battery cells are typically packaged, including but not limited to, being divided into: cylindrical battery cells, prismatic battery cells, and pouch battery cells.

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. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells to some extent. In some cases, the battery cells may be used directly, i.e., the battery may not include a case, which is not limited herein.

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

The battery cell in the embodiment of the application includes an electrode assembly and a case in which the electrode assembly is mounted to protect the electrode assembly through the case.

The electrode assembly, also called a cell, is a component for storing and releasing electric energy, and is composed of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly operates primarily by means of metal ions moving between the positive and negative electrode sheets. The positive plate comprises a positive current collector and a positive active material layer, wherein the positive active material layer is coated on the surface of the positive current collector, a part of the positive current collector, which is not coated with the positive active material layer, protrudes out of the part, which is coated with the positive active material layer, of the positive current collector, and the part, which is not coated with the positive active material layer, is used as a positive electrode lug, or a metal conductor is welded and led out of the positive current collector to be used as the positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the part of the negative electrode current collector, which is not coated with the negative electrode active material layer, protrudes out of the part coated with the negative electrode active material layer, the part of the negative electrode current collector, which is not coated with the negative electrode active material layer, is used as a negative electrode tab, or a metal conductor is welded and led out of the negative electrode current collector to be used as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. It is understood that in the electrode assembly, the number of positive electrode tabs may be one, and the number of negative electrode tabs may be one. That is, two groups of tabs are provided on the electrode assembly, each group includes at least one tab, one group of tabs is a positive tab, and the other group of tabs is a negative tab.

The electrode assembly may be a rolled structure or a laminated structure. The embodiments of the present application are not limited thereto. The winding structure is characterized in that the lugs are welded on the current collector and are arranged in the sequence of positive plates, diaphragms, negative plates and diaphragms; and winding to form a cylindrical or square battery cell. The lamination type structure is characterized in that a tab is led out of a current collector, a positive plate, a negative plate and a diaphragm are arranged in sequence from the positive plate to the diaphragm to the negative plate to the diaphragm, and the positive plate, the diaphragm and the negative plate are laminated layer by layer to form a lamination type battery cell; wherein the membrane may be cut and laminated directly with the membrane sheet, or the membrane may not be cut and laminated with a Z-fold. The separator may be made of PP (Polypropylene) or PE (Polyethylene). The diaphragm is the insulating film of setting between positive plate and negative plate, and its main roles are: the positive electrode and the negative electrode are isolated, electrons in the battery cannot pass through freely, short circuit is prevented, and ions in the electrolyte can pass through freely between the positive electrode and the negative electrode, so that a loop is formed between the positive electrode and the negative electrode. The positive and negative electrode sheets are collectively referred to as electrode sheets, also referred to as electrodes. The positive electrode tab and the negative electrode tab are collectively referred to as tabs.

After the electrode assembly is manufactured, it is necessary to mount the electrode assembly in a case and inject an electrolyte so that the electrode assembly is immersed in the electrolyte and the electrode assembly can sufficiently absorb the electrolyte. The electrolyte can provide partial active ions which are used as conductive ions in the charge and discharge processes; in addition, the electrolyte also provides an ion channel or a carrier, so that ions can freely move in the ion channel to realize electric conduction between the pole pieces. Thus, the casing is provided with a filling hole for filling the electrolyte into the casing.

After the electrode assembly is manufactured, it is also necessary to mount the electrode assembly in a case and inject an electrolyte so that the electrode assembly is immersed in the electrolyte and the electrode assembly can sufficiently absorb the electrolyte. It is common at present to provide a filling hole in the housing to fill the housing with electrolyte. However, the electrolyte filling speed is low, after the electrolyte is filled, the electrode assembly is required to be soaked after being dispersed through the end face of the electrode assembly, the lubrication speed is low, the manufacturing efficiency of the battery monomer can be affected, the electrolyte filling speed can affect the soaking effect of the electrolyte, poor electrolyte soaking is caused, the contact area between the electrolyte and the pole piece can be reduced due to poor electrolyte soaking, and therefore interface impedance is increased. This limits the rate of current transfer between the electrolyte and the pole pieces, reducing the cell performance. Poor electrolyte infiltration may lead to non-uniform gas generation in the electrolyte. These gases may accumulate inside the battery cells, forming bubbles, increasing the pressure inside the battery cells, which may cause safety problems. Poor electrolyte infiltration can also lead to uneven distribution of active materials on the pole piece surface. This can lead to reduced utilization of the active material on the pole piece, affecting the energy density and cycling stability of the cell. Poor electrolyte impregnation may cause impurities in the electrolyte to accumulate inside the battery cells. These impurities may react with the material of the electrode sheet to form a solid electrolyte interface layer, increasing the resistance and reducing the performance of the battery cell. The slow wetting of the battery cells with electrolyte may lead to interface problems affecting the performance, safety and cycle life of the battery cells.

Based on the above-mentioned consideration, in order to solve the problems of low electrolyte filling speed, long filling time and low infiltration speed of the battery cell, the embodiment of the application provides a battery cell, and the second opening is formed in the housing of the battery cell, so that after the electrode assembly is installed in the housing, the electrolyte can be filled from the second opening, thereby improving the electrolyte filling speed and improving the electrolyte filling efficiency; and the electrolyte can be used for immersing the electrode assembly rapidly, so that the electrode assembly can infiltrate the electrolyte better, the infiltration efficiency of the electrolyte is improved, and the risk of poor performance of the battery monomer due to interface problems caused by slow infiltration is reduced.

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, such as an energy storage power supply system applied to hydraulic power, firepower, wind power, solar power stations and the like. The power device may be, but is not limited to, a cell phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric automobile, a ship, a spacecraft, and the like. 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, an embodiment of the present application provides an electric device, which is described by taking a vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present 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 1001 is provided in the interior of the vehicle 1000, and the battery 1001 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 1001 may be used for power supply of the vehicle 1000, for example, the battery 1001 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a motor 1003, the controller 1002 being configured to control the battery 1001 to power the motor 1003, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 1001 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 1001 according to some embodiments of the present application. The battery 1001 includes a case 100 and a battery cell 200, and the battery cell 200 is accommodated in the case 100. The case 100 is used to provide an accommodating space for the battery cell 200, and the case 100 may have various structures. In some embodiments, the case 100 may include a first portion 101 and a second portion 102, the first portion 101 and the second portion 102 being overlapped with each other, the first portion 101 and the second portion 102 together defining an accommodating space for accommodating the battery cell 200. The second portion 102 may be a hollow structure with one end opened, the first portion 101 may be a plate-shaped structure, and the first portion 101 covers the opening side of the second portion 102, so that the first portion 101 and the second portion 102 together define an accommodating space; the first portion 101 and the second portion 102 may be hollow structures each having an opening at one side, and the opening side of the first portion 101 is engaged with the opening side of the second portion 102. Of course, the case 100 formed by the first portion 101 and the second portion 102 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc. The plurality of battery cells 200 are placed in the box 100 formed by buckling the first portion 101 and the second portion 102 after being connected in parallel or in series-parallel.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an exploded structure of a battery cell 200 according to some embodiments of the present disclosure. Referring to fig. 4 to 10, fig. 4 is an exploded view of a housing 21 according to some embodiments of the present application. Fig. 5 is a schematic top view of a housing 21 according to some embodiments of the present application. Fig. 6 is a schematic cross-sectional view taken along line A-A in fig. 5. Fig. 7 is an enlarged view of a portion C in fig. 6. Fig. 8 is an enlarged view of a portion D in fig. 6. Fig. 9 is a schematic sectional view of the structure taken along line B-B in fig. 5. Fig. 10 is an enlarged view of a portion E in fig. 9.

According to some embodiments of the present application, there is provided a battery cell 200 comprising: a housing 21, wherein a containing space is formed in the housing 21, a first opening 215 is formed at one end of the housing 21, and the first opening 215 is communicated with the containing space; the shell 21 is also provided with a second opening 216, and the second opening 216 is communicated with the accommodating space; a cover plate 217 for fitting over the second opening 216.

The case 21 is provided with an inner space to accommodate the electrode assembly, the electrolyte, and other components. The housing 21 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 21 may be determined according to the specific shape and size of the battery cell 200. The material of the housing 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.

The first opening 215 is an opening structure provided at one end of the housing 21.

One end of the case 21 is provided with a first opening 215, and the first opening 215 communicates with the receiving space so that the electrode assembly is mounted into the case 21 through the first opening 215.

The second opening 216 is an opening structure provided in the housing 21. The second opening 216 communicates with the accommodating space so as to fill the accommodating space with the electrolyte through the second opening 216 to increase the filling speed of the electrolyte.

The cover plate 217 is a plate structure for fitting over the second opening 216 so that after filling the electrolyte in the case 21, the cover plate 217 can be fitted over the second opening 216 to seal the second opening 216.

In the technical scheme of this embodiment, through set up the second opening 216 on the casing 21 of battery monomer 200, electrode assembly 10 installs in casing 21 back, can fill electrolyte through the second opening 216, and electrolyte filling speed is fast, and electrolyte can wrap up electrode assembly 10 fast moreover to well infiltration electrode assembly 10 promotes infiltration speed, can reduce moreover because of infiltration slow interfacial problem and lead to the risk of battery monomer 200 performance failure.

In some embodiments, the cover 217 may be welded to the housing 21 to connect the cover 217 to the housing 21 to seal the second opening 216.

In some embodiments, the cover 217 may also be attached to the housing 21 by a structural adhesive to seal the second opening 216. The structural adhesive has high strength, can bear large load, is ageing-resistant, fatigue-resistant and corrosion-resistant, has stable performance in the expected service life and is suitable for bearing strong structural member adhesion.

In some embodiments, the battery cell 200 includes an electrode assembly 10, and the electrode assembly 10 is mounted to the receiving space of the case 21. The electrode assembly 10 is a component that stores and releases electric energy in the battery cell 200.

In some embodiments, the battery cell 200 includes an end cap 22, the end cap 22 covering the first opening 215 of the housing 21. The end cap 22 is mated with the case 21 to constitute the housing 20 of the battery cell 200, that is, the battery cell 200 includes the housing 20, and the housing 20 includes the end cap 22 and the case 21.

The end cap 22 refers to a member that is covered at the first opening 215 of the case 21 to isolate the inner environment of the battery cell 200 from the outer environment. The shape of the end cap 22 may be adapted to the shape of the housing 21 to fit over the housing 21. Alternatively, the end cap 22 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cap 22 is not easy to deform when being extruded and collided, so that the battery cell 200 can have a higher structural strength, and the reliability can be improved. The material of the end cap 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment.

The case 21 is an assembly for cooperating with the end cap 22 to form an internal environment of the battery cell 200, wherein the formed internal environment may be used to accommodate the electrode assembly 10, electrolyte, and other components. The housing 21 and the end cap 22 may be separate components such that the end cap 22 covers the first opening 215 of the housing 21 to form the interior environment of the battery cell 200.

After the electrode assembly 10 is mounted in the case 21, the end cap 22 may be placed over the first opening 215 of the case 21, and then the electrolyte may be filled into the case 21 through the second opening 216, so that the electrolyte filling speed is high.

In some embodiments, the end cap 22 or the housing 21 is provided with a fill port 201.

The filling hole 201 is a hole structure provided in the case 20 of the battery cell 200.

Since electrolyte is filled into the case 21 to infiltrate the electrode assembly 10 with the electrolyte, the electrode assembly 10 may lower the level of the electrolyte in the case 21 after absorbing the electrolyte, and the electrolyte filling hole 201 is provided in the end cap 22 or the case 21 to supplement the electrolyte and improve the performance of the battery cell 200. In addition, in the process of soaking the electrode assembly 10 to absorb the electrolyte, the cover plate 217 can be sealed on the second opening 216, and the electrode assembly 10 does not need to wait for complete electrolyte absorption, so that the manufacturing efficiency of the battery cell 200 can be improved.

In some embodiments, the case 20 is provided with an electrode terminal 32, and the electrode terminal 32 is connected to the tab 11 of the electrode assembly 10. The electrode terminal 32 refers to a conductive member provided on the case 20, and the electrode terminal 32 is connected to the tab 11 of the electrode assembly 10 to output electric energy of the battery cell 200 or to charge the battery cell 200. The battery cell 200 has two electrode terminals 32, the two electrode terminals 32 are connected to the positive and negative tabs of the electrode assembly 10, the electrode terminal 32 connected to the positive tab is a positive electrode terminal, and the electrode terminal 32 connected to the negative tab is a negative electrode terminal. The electrode assembly 10 is connected with the electrode terminal 32 to form a battery cell 200.

In some embodiments, the electrode terminal 32 is disposed on the end cap 22 such that the electrode terminal 32 is connected with the tab 11 of the electrode assembly 10. Of course, in some embodiments, the electrode terminals 32 may also be provided on the case 21 so as to position the electrode terminals 32.

In some embodiments, the battery cell 200 includes a tab 31, and the tab 31 connects the tab 11 with the electrode terminal 32.

The switching sheet 31 refers to a conductive member provided in the battery cell 200. The switching tab 31 connects the tab 11 and the electrode terminal 32 so as to achieve electrical connection of the tab 11 and the electrode terminal 32. The number of the switching pieces 31 is generally two, two switching pieces 31 correspond to two electrode terminals 32, each switching piece 31 is connected to a corresponding electrode terminal 32, and each switching piece 31 is connected to a corresponding tab 11, that is, each tab 11 is connected to a corresponding electrode terminal 32 through a switching piece 31, so as to facilitate connection of the tab 11 to the electrode terminal 32.

In some embodiments, a pressure relief mechanism 33 is provided on the housing 20, the pressure relief mechanism 33 being configured to relieve the internal pressure of the battery cell 200.

Since the battery cell 200 generally contains a certain amount of gas inside, when the battery cell 200 is charged or discharged, a solution in the electrolyte may undergo a gas generation or absorption reaction. The generation of these gases may cause the gas pressure inside the battery cell 200 to rise, thereby causing the battery cell 200 to expand and deform. During the charge or discharge of the battery cell 200, the positive and negative electrode materials chemically react to form new compounds. These chemical reactions are accompanied by volume changes, which cause the volume of the internal materials of the battery cell 200 to change, thereby swelling and deforming the battery. When the battery cell 200 is overcharged or overdischarged, chemical reaction inside the battery cell 200 is out of control, excessive gas is generated or structural damage of an electrode material is caused, thereby causing expansion and deformation of the battery cell 200. The battery cell 200 is charged or discharged in a high temperature environment, which accelerates the progress of internal chemical reactions, increasing the generation of gas and the change in volume. The high temperature also causes swelling of the substances inside the battery cell 200, and also causes swelling deformation of the battery cell 200.

The pressure release mechanism 33 such as an explosion-proof valve and an explosion-proof sheet is arranged on the shell 20 of the battery cell 200, and when the temperature or pressure of the battery cell 200 exceeds a safety threshold, the gas or liquid in the battery cell 200 can be released, so that the pressure in the battery cell 200 is reduced, and the risk of explosion of the battery cell 200 is reduced. This may improve the safety performance of the battery cell 200 and reduce potential safety risks.

In some embodiments, a pressure relief mechanism 33 is provided on the end cap 22 to facilitate the placement of the pressure relief mechanism 33. Of course, in some embodiments, the pressure relief mechanism 33 may also be provided on the housing 21, so as to provide for a positional layout of the pressure relief mechanism 33.

Referring to fig. 3, the housing 20 defines an outer shape of the battery cell 200, and the battery cell 200 has a height direction, a length direction and a width direction. The height direction of the battery cell 200 is also the height direction of the housing 20 and the case 21, the length direction of the battery cell 200 is also the length direction of the housing 20 and the case 21, and the width direction of the battery cell 200 is also the width direction of the housing 20 and the case 21. In the figure, the Z direction is the height direction of the battery cell 200, the X direction is the length direction of the battery cell 200, and the Y direction is the width direction of the battery cell 200. The two ends of the housing 21 along the height direction Z are a first end 211 and a second end 212, respectively. The portion of the housing 21 located on the side in the height direction Z is a side wall of the housing 21, and the side wall of the housing 21 is also a side wall of the accommodating space. One surface of the side wall, which is away from the accommodating space, is the outer surface of the side wall. The side walls of the housing 21 include two first side walls 213 and two second side walls 214, the two first side walls 213 are disposed opposite to each other, the two second side walls 214 are disposed opposite to each other, and the two second side walls 214 are disposed on opposite sides of the first side walls 213, and similarly, the two first side walls 213 are disposed on opposite sides of the second side walls 214, and each first side wall 213 is adjacent to each second side wall 214. In some embodiments, two first sidewalls 213 may be located at both ends of the housing 21 in the length direction X, and two second sidewalls 214 are located at both ends of the housing 21 in the width direction Y, that is, the distance between the outer surfaces of the two first sidewalls 213 is the length of the housing 21 and the distance between the outer surfaces of the two second sidewalls 214 is the width of the housing 21. Of course, in some embodiments, two first sidewalls 213 may be located at both ends of the width direction Y of the housing 21, and two second sidewalls 214 are located at both ends of the length direction X of the housing 21, that is, the distance between the outer surfaces of the two first sidewalls 213 is the width of the housing 21, and the distance between the outer surfaces of the two second sidewalls 214 is the length of the housing 21. In the following embodiments of the present application, two first sidewalls 213 may be located at two ends of the housing 21 in the length direction X, and two second sidewalls 214 are located at two ends of the housing 21 in the width direction Y.

In some embodiments, the second opening 216 is provided at an end of the housing 21 remote from the first opening 215.

Since the first opening 215 is disposed at one end of the housing 21 and the second opening 216 is disposed at the other end of the housing 21, the first opening 215 and the second opening 216 are disposed at opposite ends of the housing 21, respectively, such as the first opening 215 is disposed at the first end 211 of the housing 21 and the second opening 216 is disposed at the second end 212 of the housing 21.

Since the electrode assembly 10 is mounted in the case 21 from the first opening 215, the second opening 216 is provided at the second end 212 of the case 21, and the height of the electrode assembly 10 is generally smaller than that of the case 20, the battery cell 200 is inverted, so that the electrode assembly 10 is located at a distance from the end surface of the second end 212 of the case 21 to facilitate electrolyte filling.

The provision of the second opening 216 in the housing 21 remote from the first opening 215 facilitates filling of the electrolyte and also facilitates wetting of the electrode assembly 10 by the electrolyte.

In some embodiments, the second end 212 of the housing 21 may be entirely disposed as the second opening 216, and then the second end 212 of the housing 21 may be formed in an open shape to facilitate filling with electrolyte. Of course, the second opening 216 may be formed in the end surface of the second end 212 of the housing 21.

Referring to fig. 15 and 16, fig. 15 is a schematic structural diagram of a battery cell 200 according to some embodiments of the present disclosure, wherein a cover 217 is separated from a housing 21. Fig. 15 is a schematic structural diagram of a battery cell 200 according to other embodiments of the present application, wherein a cover 217 is separated from a housing 21.

In some embodiments, a second opening 216 may also be provided in a side wall of the housing 21, as in fig. 15, with the second opening 216 provided in the first side wall 213 of the housing 21. As in fig. 16, a second opening 216 is provided in the second side wall 214 of the housing 21. Which can all be filled with electrolyte from the second opening 216 into the housing 21 to increase the rate of electrolyte filling.

Referring to fig. 9 and 10, and referring to fig. 12, 13, and 17 to 19, fig. 12 is a schematic structural diagram of connection between a support structure 2141 and an adapting structure 2171 according to some embodiments of the present application. Fig. 13 is an exploded view of a housing 21 according to some embodiments of the present application. Fig. 17 is a schematic cross-sectional structure of a housing 21 provided in some embodiments of the present application. Fig. 18 is a schematic cross-sectional view of a housing 21 according to other embodiments of the present application. Fig. 19 is a schematic cross-sectional view of a housing 21 provided in further embodiments of the present application.

In some embodiments, the housing 21 includes two first sidewalls 213 disposed opposite to each other and two second sidewalls 214 disposed opposite to each other, the second sidewalls 214 are adjacent to the first sidewalls 213, ends of the second openings 216 extend to outer surfaces of the first sidewalls 213, the two second sidewalls 214 are respectively provided with a support structure 2141, and opposite sides of the cover plate 217 are respectively provided with an adapting structure 2171 adapted to be connected with the support structure 2141.

The first side wall 213 and the second side wall 214 are side walls of the housing 21 on the side in the height direction Z.

The support structure 2141 is a structure disposed on the second sidewall 214 for supporting the cover plate 217. The two second sidewalls 214 are respectively provided with a supporting structure 2141, and then each second sidewall 214 is provided with a supporting structure 2141.

The adapting structure 2171 refers to a structure provided on the cover plate 217 for being cooperatively connected with the supporting structure 2141. The cover plate 217 is provided with an adapter structure 2171 on opposite sides.

A support structure 2141 is provided on the second side wall 214, and an adapter structure 2171 is provided at a side of the cover 217 to support the cover 217 on the case 21 by the support structure 2141 being engaged with the adapter structure 2171 so as to mount the electrode assembly 10 into the case 21; while the end of the second opening 216 extends to the outer surface of the first side wall 213 for mounting the cover plate 217 from one side of the housing 21 for facilitating the connection of the support structure 2141 with the adapter structure 2171.

In some embodiments, when the second opening 216 is provided on a side wall of the housing 21, the structure 2141 may also be supported on side walls on opposite sides of the second opening 216 to support the cover plate 217.

In some embodiments, when the second opening 216 is located on a side of the housing 21 adjacent to the first opening 215, four sides of the second opening 216 constitute the first and second sidewalls described above.

In some embodiments, the support structure 2141 includes a sliding rail 41 disposed on the second sidewall 214, and the adapting structure 2171 includes a sliding slot 42 disposed on the cover plate 217; or the supporting structure 2141 includes a sliding slot 42 provided on the second side wall 214, and the adapting structure 2171 includes a sliding rail 41 provided on the cover plate 217; the slide rail 41 is slidably disposed in the slide groove 42.

The slide rail 41 is a plate-like structure, a bar-like structure, or the like provided with a certain length.

The slide groove 42 is a groove structure into which the slide rail 41 is inserted.

The sliding rail 41 is slidably disposed in the sliding groove 42, so as to realize the mating connection between the support structure 2141 and the adapting structure 2171.

The sliding rail 41 is disposed on the second side wall 214, and the sliding groove 42 is disposed on the corresponding first side wall 213. Of course, the sliding rail 41 is disposed on the first side wall 213, and the sliding slot 42 is disposed on the corresponding second side wall 214.

The cover plate 217 is slidably inserted into the second opening 216 by the engagement of the slide rail 41 with the slide groove 42, so that the cover plate 217 is mounted on the housing 21, and the housing 21 supports the cover plate 217.

Referring to fig. 10, 12 and 13, the second side wall 214 is provided with a sliding rail 41 to form a supporting structure 2141, and the sliding rail 41 may be a plate-like or strip-like structure disposed on an inner surface of the second side wall 214 to reduce the size and volume of the sliding rail 41, thereby reducing the space occupied by the housing 21. Correspondingly, the cover 217 is provided with slide grooves 42 on opposite sides thereof to form an adapting structure 2171. In assembly, the slide rail 41 is inserted into the slide groove 42 and the cover plate 217 is slid to mount the cover plate 217 on the housing 21 and cover the second opening 216, and the side wall of the slide groove 42 and thus the cover plate 217 is supported by the slide rail 41.

In some embodiments, the sliding rail 41 is disposed at the second end 212 of the second side wall 214, and the sliding rail 41 has a plate-shaped structure, so that the second end 212 of the second side wall 214 can be bent to form the sliding rail 41, which is convenient for processing and manufacturing. Of course, the sliding rail 41 may be manufactured separately and then welded or adhered to the second sidewall 214.

Referring to fig. 17 to 19, a chute 42 is disposed on the second sidewall 214 to form a support structure 2141. Accordingly, the slide rails 41 are disposed on opposite sides of the cover 217 to form the adapting structure 2171. At the time of assembly, the slide rail 41 is inserted into the slide groove 42 and the cover plate 217 is slid to mount the cover plate 217 on the housing 21 and cover the second opening 216, and the slide rail 41 and thus the cover plate 217 are supported by the side wall of the slide groove 42.

In some embodiments, the sliding rail 41 may be a thinned structure on the corresponding side of the cover 217, that is, the thickness of the sliding rail 41 may be smaller than the thickness of the rest of the cover 217, so that the sliding groove 42 on the second side wall 214 may be relatively smaller, so as to reduce the space occupied by the sliding groove 42 and further reduce the volume of the housing 21. Of course, in some embodiments, a portion of the side edge of the cover plate 217 may also be used directly as the slide rail 41.

In some embodiments, referring to fig. 10, 13, 17 and 18, the walls of the chute 42 are U-shaped.

The groove wall surface means a surface of the side wall forming the chute 42. All of the slot wall surfaces of the slot 42 cooperate to define the configuration of the slot 42. The groove wall of the chute 42 is in a U shape, so that the chute 42 is in a U-shaped groove, the U-shaped groove means that the cross section of the chute 42 is in a U shape, and two opposite sides of the chute structure are provided with side walls.

The groove wall surface is provided with the U-shaped sliding groove 42, and the sliding rail 41 is arranged in the sliding groove 42, so that the sliding rail can clamp the two opposite surfaces of the cover plate 217 to be positioned, and the cover plate 217 can be supported conveniently.

In some embodiments, referring to fig. 10 and 13, when the chute 42 is disposed on the cover plate 217, the chute 42 may be disposed at a middle portion of the corresponding side of the cover plate 217 in the thickness direction, so as to facilitate forming a U-shaped chute structure on the cover plate 217.

In some embodiments, referring to fig. 17 and 18, when the chute 42 is provided on the second sidewall 214, as in fig. 17, the chute 42 may be provided directly on the inner surface of the second sidewall 214. As shown in fig. 18, an extension portion may be provided on the inner surface of the second sidewall 214 at the middle portion of the extension portion in the thickness direction, so as to facilitate the formation of a U-shaped groove structure on the cover plate 217. The extension portion may be formed by bending the second end 212 of the second sidewall 214, so as to facilitate processing and manufacturing. Of course, the extension may be welded or adhered to the second sidewall 214 after being separately manufactured.

In some embodiments, referring to fig. 12 and 19, the slot wall of the slot 42 is L-shaped.

The groove wall surface means a surface of the side wall forming the chute 42. All of the slot wall surfaces of the slot 42 cooperate to define the configuration of the slot 42.

The groove wall surface of the chute 42 is L-shaped, which means that the chute 42 has only two groove wall surfaces, and the two groove wall surfaces form an L-shape, so that the portion of the chute 42 is in a stepped structure.

The groove wall surface is provided with the L-shaped chute 42, so that the chute 42 is convenient to process and manufacture, and the cover plate 217 can be assembled with the shell 21 in an adapting way.

In some embodiments, the sliding groove 42 is disposed on the cover 217, as shown in fig. 12, the sliding groove 42 may be disposed on a corresponding side of the cover 217, so that the corresponding side of the cover 217 forms a stepped structure for convenience in processing and manufacturing.

In some embodiments, the chute 42 is disposed on the second side wall 214, as shown in fig. 19, an extension portion 2142 may be disposed on an inner surface of the second side wall 214, and the chute 42 is disposed on an edge of the inner surface of the extension portion 2142, so that a side edge of the extension portion 2142 away from the second side wall 214 forms a stepped structure to support the cover plate 217, which is convenient for processing and manufacturing.

Referring to fig. 4, fig. 6 to fig. 8, and fig. 11, fig. 11 is a schematic structural diagram illustrating a mating connection between the first sidewall 213 and the cover 217 according to some embodiments of the present application.

In some embodiments, one end of the second opening 216 extends to an outer surface of one first sidewall 213, and the other first sidewall 213 is provided with a support plate 2131 for supporting a corresponding end of the cover plate 217.

Since the first side walls 213 are two, the two first side walls 213 are located at opposite sides of the housing 21, respectively. The second opening 216 extends from the outer surface of one first sidewall 213 to the outer surface of the other first sidewall 213, and when the cover plate 217 is inserted from the direction of one first sidewall 213 and pushed toward the other first sidewall 213, the cover plate 217 is covered on the second opening 216.

The support plate 2131 refers to a plate-like or bar-like structure provided on the first sidewall 213. The manner in which the support plate 2131 is formed on the first sidewall 213 may be varied, for example, it may be separately formed and then fixed on the inner surface of the first sidewall 213; or may be formed by bending the second end 212 of the first sidewall 213; it may be integrally formed with the first sidewall 213 when the housing 21 is stamped or cast.

Extending one end of the second opening 216 to an outer surface of one of the first side walls 213 for inserting the cover plate 217; and a support plate 2131 is provided on the other first sidewall 213 to support a corresponding end of the cap plate 217, and may be engaged with the support structure 2141 to more stably support the cap plate 217, facilitating the installation of the electrode assembly 10.

In some embodiments, the cover plate 217 is provided with a slot 43 into which the support plate 2131 is inserted.

The slot 43 is a slot structure provided on the cover plate 217 at a side corresponding to the support plate 2131. Since the support plate 2131 is inserted into the slot 43 and the cover plate 217 is covered on the second opening 216, the support plate 2131 is positioned at one end of the second opening 216, the slot 43 may be disposed at the middle of the thickness direction of the cover plate 217, so that after the support plate 2131 is inserted into the slot 43, opposite sides of the cover plate 217 may be defined by opposite sidewalls of the slot 43 to position the corresponding end of the cover plate 217 and support the cover plate 217 and thus the corresponding end of the cover plate 217.

In some embodiments, slots 43 may also be provided on support plate 2131, and insertion of the corresponding ends of cover plate 217 into slots 43 on support plate 2131 may also serve to position and support the corresponding ends of cover plate 217.

A slot 43 is provided in one of the cover plate 217 or the support plate 2131 for insertion of a corresponding end of the other for positioning and supporting the cover plate 217.

In some embodiments, when one second sidewall 214 is provided with a support plate 2131 for supporting one end of the cover plate 217, the corresponding end of the other second sidewall 214 abuts against the cover plate 217 to position the cover plate 217 so as to fix the cover plate 217 on the housing 21.

In some embodiments, the support plate 2131 may also be used to support the corresponding end of the cover plate 217 to support the cover plate 217 for ease of manufacturing.

In some embodiments, referring to fig. 13 and also referring to fig. 8, opposite ends of the second opening 216 extend to outer surfaces of the two first sidewalls 213, respectively, and each first sidewall 213 abuts against a corresponding end of the cover 217.

Opposite ends of the second opening 216 are extended to outer surfaces of the two first sidewalls 213, respectively, and the cover plate 217 may be inserted into the second opening 216 from one of the first sidewalls 213, facilitating installation of the cover plate 217. Since the support structure 2141 cooperates with the adapting structure 2171 to support the cover plate 217 on the housing 21, the first side wall 213 abuts against the cover plate 217, so that friction between the support structure 2141 and the adapting structure 2171 can be increased to better fix the cover plate 217, and risk of the cover plate 217 sliding out is reduced, so that the first side wall 213 cooperates with the support structure 2141 to fix the cover plate 217.

In some embodiments, referring to fig. 11, a step 2172 is formed at one end of the cover 217, and the step 2172 forms a positioning groove 2173, and the first sidewall 213 extends into the positioning groove 2173.

The stepped portion 2172 is a stepped portion provided at one end of the cover 217. The step 2172 has an L-shaped groove structure, which forms a positioning groove 2173, and when the first sidewall 213 extends into the positioning groove 2173, two groove walls of the positioning groove 2173 are respectively matched with the end surface and the inner surface of the first sidewall 213 for positioning.

By providing the step portion 2172 at one end of the cover plate 217, inserting the second opening 216 into the cover plate 217, allowing one end of the cover plate 217 to reach the other second side wall 214 and allowing the second side wall 214 to extend into the positioning groove 2173, the cover plate 217 can be positioned, and the cover plate 217 can be conveniently mounted.

Referring to fig. 14, fig. 14 is a schematic cross-sectional structure of a housing 21 according to some embodiments of the present application. In some embodiments, the cover 217 may also directly cover the second opening 216, so as to facilitate the manufacturing and assembly of the housing 21 and the cover 217.

In some embodiments, the edge of the cover plate 217 may be provided with a step 2174, where the step 2174 is a stepped portion of the edge of the cover plate 217 to mate with the sidewall of the second opening 216, such as the second sidewall 214 in fig. 14, to position the cover plate 217 to facilitate capping the cover plate 217 over the second opening 216.

According to some embodiments of the present application, there is provided a battery cell 200 including a case 20 and an electrode assembly 10, the electrode assembly 10 being mounted in the case 20. The housing 20 includes a shell 21 and an end cap 22, wherein a first opening 215 is provided at one end of the shell 21, and the end cap 22 covers the first opening 215. The other end of the case 21 is provided with a second opening 216, and after the electrode assembly 10 is mounted in the case 21, electrolyte can be filled from the second opening 216 to increase the filling speed of the electrolyte and the soaking speed of the electrode assembly 10, and then the end cap 22 is sealed over the second opening 216. The slide rails 41 may be provided on opposite side walls of the case 21, and the slide grooves 42 may be provided on opposite sides of the cover plate 217, respectively, the slide rails 41 may be placed in the slide grooves 42, and the cover plate 217 may be slidably mounted on the case 21 so that the cover plate 217 covers the second opening 216, or the cover plate 217 may be supported by the case 21 so that the electrode assembly 10 is mounted in the case 21.

According to some embodiments of the present application, there is also provided a battery comprising a battery cell according to any of the above aspects.

According to some embodiments of the present application, there is also provided an electrical device comprising a battery according to any of the above aspects.

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

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

1. A battery cell, comprising:

the shell is provided with an accommodating space, one end of the shell is provided with a first opening, and the first opening is communicated with the accommodating space; the shell is also provided with a second opening, and the second opening is communicated with the accommodating space;

An end cap covering the first opening;

the cover plate is used for being matched with the sealing cover on the second opening;

the shell comprises two first side walls and two second side walls, wherein the two first side walls are oppositely arranged, the two second side walls are oppositely arranged, the second side walls are adjacent to the first side walls, the end parts of the second openings extend to the outer surfaces of the first side walls, supporting structures are respectively arranged on the two second side walls, and adapting structures which are connected with the supporting structures in an adapting mode are respectively arranged on the two opposite sides of the cover plate.

2. The battery cell of claim 1, wherein the second opening is disposed at an end of the housing remote from the first opening.

3. The battery cell of claim 1, wherein the support structure comprises a slide rail disposed on the second sidewall, and the adapter structure comprises a chute disposed on the cover plate; or the supporting structure comprises a sliding groove arranged on the second side wall, and the adapting structure comprises a sliding rail arranged on the cover plate;

the sliding rail is arranged in the sliding groove in a sliding way.

4. The battery cell as recited in claim 3, wherein the chute wall of the chute is U-shaped or the chute wall of the chute is L-shaped.

5. The battery cell as recited in any one of claims 1-4, wherein one end of the second opening extends to an outer surface of one of the first side walls, and the other of the first side walls is provided with a support plate that supports a corresponding end of the cover plate.

6. The battery cell as recited in claim 5, wherein the cover plate is provided with a slot into which the support plate is inserted; or, the supporting plate is provided with a slot for inserting the corresponding end of the cover plate.

7. The battery cell of any one of claims 1-4, wherein opposite ends of the second opening extend to outer surfaces of two of the first side walls, respectively, each of the first side walls abutting a corresponding end of the cover plate.

8. The battery cell as recited in claim 7, wherein one end of the cover plate is provided with a step portion, the step portion forming a positioning groove, the positioning groove being extended into the corresponding first sidewall.

9. The battery cell of any one of claims 1-4, wherein the end cap or the housing is provided with a fill port.

10. A battery comprising a battery cell according to any one of claims 1-9.

11. An electrical device comprising the battery of claim 10.