CN220306447U

CN220306447U - Battery monomer, battery and power consumption device

Info

Publication number: CN220306447U
Application number: CN202322687141.2U
Authority: CN
Inventors: 苏华圣; 郑于炼; 李志尧; 王鹏; 金海族
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-01-05
Anticipated expiration: 2033-10-08

Abstract

The application is applicable to the technical field of batteries, and provides a battery monomer, battery and power consumption device, and power consumption device includes the battery, and the battery includes the battery monomer, and the battery monomer includes shell, electrode assembly, electrode terminal and switching structure. The electrode terminal is disposed in the case. The electrode assembly is disposed within the housing. The switching structure is arranged in the shell and is connected with the electrode terminal and the electrode assembly in a conducting way. At least part of the switching structure is arranged at the end side of the electrode assembly along the first direction, and a first through hole communicated with the electrode assembly is arranged in a penetrating way along the first direction. The dimension of the first through hole along the second direction is larger than the dimension of the first through hole along the third direction. At least part of the switching structure is provided with a first through hole communicated with the electrode assembly, so that gas generated by the electrode assembly can be far away from the electrode assembly through the first through hole, the risk that the gas generated by the electrode assembly is accumulated in the electrode assembly can be reduced, and the exhaust effect of the electrode assembly can be improved.

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

The battery cell may include a case, an electrode assembly, an electrode terminal, and a switching structure for conductively connecting the tab and the electrode terminal of the electrode assembly.

In some cases the transfer structure is typically disposed between the end side of the electrode assembly and the housing. Thus, the gas generated by the electrode assembly is difficult to be blocked by the switching structure, so that the electrode assembly is difficult to be far away under the blocking effect of the switching structure, and then the gas is difficult to flow to the pressure release mechanism on the shell for release. As such, the gas generated from the electrode assembly has a risk of accumulating in the electrode assembly, so that the exhaust effect of the electrode assembly is affected.

Disclosure of Invention

In view of the above, embodiments of the present application provide a battery cell, a battery, and an electric device, which can improve the technical problem of poor exhaust effect of an electrode assembly.

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

a housing;

an electrode terminal provided to the case;

an electrode assembly disposed within the housing;

the switching structure is arranged in the shell and is connected with the electrode terminal and the electrode assembly in a conducting way; at least part of the switching structure is arranged at the end side of the electrode assembly along the first direction, and a first through hole communicated with the electrode assembly is arranged in a penetrating way along the first direction;

The size of the first through hole along the second direction is larger than the size of the first through hole along the third direction, the first direction and the second direction are intersected, the first direction and the third direction are intersected, and the second direction and the third direction are intersected.

The battery monomer that this application embodiment provided sets up in electrode assembly along the terminal side of first direction through the at least part of switching structure, and link up along first direction and be provided with the first through-hole that communicates in electrode assembly for electrode assembly produced gas can be kept away from electrode assembly through first through-hole. And, by the size design of the first through hole, the size of the first through hole along the second direction can be increased on the basis of maintaining the size of the first through hole along the third direction, namely, the size of the first through hole is increased. Thus, the exhaust effect of the electrode assembly can be improved, the risk that gas generated by the electrode assembly is accumulated in the electrode assembly is reduced, and the exhaust effect of the battery cell can be improved.

In some embodiments, the electrode assembly is provided with a central hole, and the first through hole is disposed opposite to the central hole in the first direction.

Through setting up the centre bore of electrode assembly and first through-hole relatively, on the one hand can improve electrode assembly's exhaust effect, on the other hand can realize the location to the switching structure in the battery cell.

In some embodiments, one side or two opposite sides of the first through hole along the second direction are provided with second through holes;

the at least one second through hole is communicated with the first through hole, and/or the at least one second through hole is distributed with the first through hole at intervals.

By the arrangement, on one hand, the through hole on the switching structure can be in any shape, and on the other hand, the exhaust effect of the electrode assembly and the electrolyte infiltration effect can be improved.

In some embodiments, the switching structure is further provided with a first switching part and a second switching part, wherein the first switching part and the second switching part are distributed at intervals along a third direction and are connected to the electrode assembly in a conducting manner; the first through holes are arranged between the first switching part and the second switching part at intervals.

By the arrangement, the conducting connection part of the switching structure and the electrode assembly has larger overcurrent capacity, and the part of the switching structure used for conducting connection with the electrode assembly avoids the first through hole.

In some embodiments, the switching structure further includes a connection part conductively connected to the electrode terminal, the first through hole is disposed at the connection part, and the first switching part and the second switching part are both connected to the connection part; the first transfer portion is provided to protrude with respect to the connection portion along a first direction toward one side of the electrode assembly, and/or the second transfer portion is provided to protrude with respect to the connection portion along the first direction toward one side of the electrode assembly.

By the arrangement, the conducting connection relation between the electrode lug of the electrode assembly and the first transfer part can be better realized and maintained; and/or, the connection relation between the electrode lug of the electrode assembly and the second switching part can be better realized and maintained.

In some embodiments, the first transfer portion is disposed recessed with respect to the connection portion along a side of the first direction away from the electrode assembly; and/or, the second transfer part is concavely arranged relative to the connecting part along one side of the first direction away from the electrode assembly.

In this way, the first switching part is arranged to protrude from the connecting part along the first direction towards one side of the electrode assembly; and/or facilitating the protruding arrangement of the second switching part with respect to the connecting part along the first direction toward one side of the electrode assembly.

In some embodiments, the first transfer portion and the first through hole are increasingly disposed in a distance along the third direction in a direction in which a center of the first transfer portion along the second direction extends toward the opposite ends;

and/or, in the direction that the center of the second adapting part extends towards the opposite ends along the second direction, the distance between the second adapting part and the first through hole along the third direction is gradually increased.

Through adopting above-mentioned technical scheme for the switching structure has great spatial layout second through-hole in the relative both sides of first through-hole along the second direction, thereby is convenient for improve electrode assembly's exhaust effect and electrolyte to electrode assembly's infiltration effect.

In some embodiments, the first through hole is at a distance of 0.1mm or more from the first transition; and/or the distance between the first through hole and the second switching part is more than 0.1 mm.

The arrangement is convenient for forming the first switching part and/or the second switching part on the switching structure.

In some embodiments, the first through hole is at a distance of 0.2mm or more from the first transition; and/or the distance between the first through hole and the second switching part is more than 0.2 mm.

In some embodiments, the housing is provided with a pressure relief mechanism, the first through hole being in communication with the pressure relief mechanism.

Through first through-hole and relief mechanism intercommunication for the gaseous flow to relief mechanism that can flow through first through-hole of electrode assembly production to realize releasing through relief mechanism, thereby realize the pressure release of battery monomer.

In some embodiments, the switching structure comprises a first switching piece and a second switching piece arranged on the first switching piece, wherein at least part of the first switching piece is arranged on the end side of the electrode assembly along the first direction, and a first through hole is formed through the first switching piece along the first direction; the first adapter is connected to the electrode assembly in a conducting manner; the second adapter is connected to the electrode terminal in a conductive manner and is arranged at intervals from the first through hole.

Through setting up first adaptor and second adaptor, the switching structure of being convenient for switches on and connects in electrode assembly and electrode terminal. And, the second adaptor sets up with first through-hole interval, and first through-hole of being convenient for is discharged to improve electrode assembly's exhaust effect.

In some embodiments, the second adapter is bent with respect to the first adapter and at least partially spaced apart from one end of the first through hole away from the electrode assembly in the first direction.

The second adapter is convenient to be abutted against the electrode terminal so as to realize and maintain the conductive connection between the electrode terminal and the second adapter. At least part of the second transfer piece is positioned at one end of the first through hole far away from the electrode assembly along the first direction at intervals, and the second transfer piece can avoid the first through hole better.

In some embodiments, the housing is provided with a pressure relief mechanism, the pressure relief mechanism and the first through hole being distributed sequentially along the second direction; the second adapter is provided with a first end side used for being connected with the first adapter, the first end side is arranged at one side of the first through hole far away from the pressure release mechanism along the second direction at intervals, and the second adapter and the first adapter are enclosed to form an exhaust space for communicating the first through hole and the pressure release mechanism; the second direction intersects the first direction.

The first end side of the second adapter is arranged on one side, far away from the pressure relief mechanism, of the first through hole along the second direction, so that the connection part of the second adapter and the first adapter can not block the flow of gas between the first through hole and the pressure relief mechanism as much as possible, and the exhaust effect of the electrode assembly can be improved.

In some embodiments, the battery cell further includes an insulating structure disposed within the housing and at least partially disposed between a side of the switching structure remote from the electrode assembly in the first direction and the housing.

Through setting up insulation structure, can realize the insulation between switching structure and the shell to improve the single reliability of battery.

In some embodiments, the insulating structure comprises:

an insulating member at least partially disposed between one side of the switching structure, which is away from the electrode assembly in the first direction, and the case;

the insulation boss is arranged on one side of the insulation piece, facing the switching structure along the first direction, and is propped against the switching structure along the first direction.

Therefore, the switching structure can be propped against the lug of the electrode assembly under the propping action of the insulation boss, so that the conductive connection between the switching structure and the electrode assembly is convenient to realize and maintain.

In some embodiments, the insulating boss is provided with a recess, at least part of which extends through the insulating boss in the first direction towards one side of the adapter structure.

In this way, the electrolyte in the grooves can flow to the electrode assembly to infiltrate the electrode assembly, and the electrolyte infiltration effect of the electrode assembly is improved.

In some embodiments, the housing is provided with a pressure relief mechanism, the insulating member is provided with an exhaust slot opposite to the pressure relief mechanism in a first direction, the insulating boss is provided with an avoidance slot for avoiding the exhaust slot and communicating with the first through hole, and the pressure relief mechanism and the electrode assembly are oppositely arranged through the exhaust slot and the avoidance slot.

So set up, the gaseous flow that the electrode assembly of being convenient for produced to release through relief mechanism to can improve electrode assembly's exhaust effect, with the single pressure release effect of improvement battery, make the single battery have higher reliability.

In some embodiments, the housing is provided with first walls at opposite ends in the first direction, at least one of the first walls being provided with a liquid injection hole, the liquid injection hole being in communication with the first through hole.

By the arrangement, the electrolyte can infiltrate the electrode assembly as much as possible, so that the electrolyte can be prevented from being detained in the switching structure without infiltrating the electrode assembly, and the electrolyte infiltrating effect can be improved.

In some embodiments, the electrode terminals are provided in two and divided into a first electrode terminal and a second electrode terminal; the shell is internally provided with a first switching structure and a second switching structure, and the first switching structure and/or the second switching structure are/is a switching structure; the first switching structure and the second switching structure are respectively arranged at two opposite ends of the electrode assembly along the first direction, and the first electrode terminal and the second electrode terminal are respectively arranged at two opposite ends of the shell along the first direction; the first switching structure is connected with the first electrode terminal and the electrode assembly in a conducting way, and the second switching structure is connected with the second electrode terminal and the electrode assembly in a conducting way.

By adopting the technical scheme, the two opposite ends of the shell along the first direction are respectively provided with the first electrode terminal and the second electrode terminal, the first electrode terminal is connected with the electrode assembly in a conducting way through the first switching structure, and the second electrode terminal is connected with the electrode assembly in a conducting way through the second switching structure.

In some embodiments, the battery cells are cylindrical.

So arranged, the battery cell is a cylindrical battery cell.

In a second aspect, embodiments of the present application provide a battery, including a battery cell.

The battery provided by the embodiment of the application can improve the exhaust effect of the battery through adopting the battery monomer related to the above, and further can improve the exhaust effect of the battery.

In a third aspect, embodiments of the present application provide an electrical device including a battery cell or a battery.

The power consumption device provided by the embodiment of the application can improve the exhaust effect of the battery through adopting the battery monomer or the battery related to the power consumption device, and then can improve the exhaust effect of the battery, so that the power consumption device has higher reliability.

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 of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a top view of a battery cell provided in some embodiments of the present application;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is an enlarged view at C in FIG. 4;

FIG. 7 is an exploded schematic view of a battery cell provided in some embodiments of the present application;

FIG. 8 is a partial block diagram of a battery cell according to some embodiments of the present application;

fig. 9 is a block diagram of a switching structure of a battery cell according to some embodiments of the present disclosure;

fig. 10 is a block diagram of a switching structure of a battery cell according to other embodiments of the present disclosure;

fig. 11 is a block diagram of a switching structure of a battery cell according to still other embodiments of the present application;

FIG. 12 is an exploded view of the structure of FIG. 8;

fig. 13 is a perspective view of an insulation structure of a battery cell according to some embodiments of the present application;

fig. 14 is a view showing a structure of the insulating structure shown in fig. 13, and a structure of the end cap, the electrode terminal, and the pressure release mechanism.

Wherein, each reference sign in the figure:

1000-vehicle; 100-cell; 200-a controller; 300-motor; 10-battery cell; 20-a box body; 201-accommodation space; 21-a first part; 22-a second part; 11-an electrode assembly; 1101-central aperture; 12-a housing; 1201-liquid injection hole; 121-a housing; 122-end caps; 122 A-A first wall; 123-a pressure release mechanism; 13-electrode terminals; 13 A-A first electrode terminal; 13 b-a second electrode terminal; 14-switching structure; 14 A-A first switching structure; 14 b-a second switching structure; 1401-a first through hole; 1402-a second via; 1403-exhaust space; 141-a first adapter; 1411-a first transition; 1412-second transition; 1413-connecting portion; 142-a second adapter; 1421-a first end side; 15-an insulating structure; 15 A-A first insulating structure; 15 b-a second insulating structure; 1501-grooves; 1502-exhaust slots; 1503-avoidance groove; 151-insulating member; 152-insulating bosses; l1-a first dimension; l2-a second dimension; l3-a first distance; l4-a second distance; z-a first direction; y-a second direction; x-third direction.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify 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 present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present application, the meaning of "plurality" is two or more, and "two or more" includes two unless specifically defined otherwise. Accordingly, "multiple sets" means more than two sets, including two sets.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can 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 terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, the term "and/or" is merely an association relation describing an associated object, and means that three relations may exist, for example, a and/or B may mean: there are three cases, a, B, a and B simultaneously. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. 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.

In the related art, a battery cell may generally include a case, an electrode assembly, an electrode terminal, and a switching structure, both of which are disposed in an internal environment defined by the case. The switching structure may be connected to the tab and the electrode terminal of the electrode assembly in a conductive manner, but is not limited to, welding, so as to achieve the conduction between the electrode assembly and the electrode terminal. In this way, the switching structure can realize overcurrent between the electrode assembly and the electrode terminal.

In some cases, the switching structure is generally disposed between the end side of the electrode assembly and the housing. Thus, the gas generated by the electrode assembly is difficult to be blocked by the switching structure, so that the electrode assembly is difficult to be far away under the blocking effect of the switching structure, and then the gas is difficult to flow to the pressure release mechanism on the shell for release. As such, the gas generated from the electrode assembly has a risk of accumulating in the electrode assembly, so that the exhaust effect of the electrode assembly is affected, thereby affecting the exhaust effect of the entire battery cell.

Based on the above considerations, the embodiments of the present application provide a battery cell, a battery and an electric device, wherein at least a portion of the switching structure is disposed on an end side of the electrode assembly along the first direction, and a first through hole communicated with the electrode assembly is disposed along the first direction, so that gas generated by the electrode assembly can be far away from the electrode assembly through the first through hole. And, by the size design of the first through hole, the size of the first through hole along the second direction can be increased on the basis of maintaining the size of the first through hole along the third direction, namely, the size of the first through hole is increased. Thus, the exhaust effect of the electrode assembly can be improved, the risk that gas generated by the electrode assembly is accumulated in the electrode assembly is reduced, and the exhaust effect of the battery cell can be improved.

In some embodiments, the battery cells and batteries according to embodiments of the present application may be used in power devices that use the battery cells or batteries as a power source.

The electric device according to the embodiment of the application may be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, a vehicle, a ship, a spacecraft, and the like. Among them, the electric toy may include fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy, etc. Spacecraft may include airplanes, rockets, space shuttles, spacecraft, and the like. According to the power source division, 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 an extended range vehicle. The vehicles can be front-drive automobiles, rear-drive automobiles or four-drive automobiles according to the driving mode.

In other embodiments, the battery cells and batteries according to embodiments of the present application may also be used in energy storage devices. The energy storage device can be an energy storage container, an energy storage electric cabinet and the like.

The battery to which embodiments of the present application relate may be a single physical module including one or more battery cells to provide higher voltage and capacity. When a plurality of battery cells are arranged, the plurality of battery cells are connected in series, in parallel or in series-parallel through the converging component, and the series-parallel refers to that the plurality of battery cells are connected in series or in parallel.

In some embodiments, the battery may be a battery module. When a plurality of battery cells are provided, the plurality of battery cells are arranged and fixed to form a battery module. As one example, a plurality of battery cells may be fixed by a tie or the like to form a battery module. As one example, a plurality of battery cells may also be fixed by end plates, side plates, or the like to form a battery module.

In other embodiments, the battery may be a battery pack, which may include a case and a battery cell. As one example, the battery cells may be directly accommodated in the case. As an example, the battery cells may be formed into a battery module and then accommodated in a case.

The battery cell according to the embodiment of the present application refers to a minimum unit for storing and outputting electric energy. The battery cell can be a secondary battery or a primary battery. The battery cell may be, but is not limited to, a metal battery, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped.

For convenience of description, the embodiments of the present application will be described with reference to an electric device as an example of a vehicle.

In some embodiments, referring to fig. 1, fig. 1 is a schematic diagram of a vehicle 1000 according to some embodiments of the present application. The battery 100 is provided in the vehicle 1000, and the battery 100 may be provided at the bottom or at the head or at the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, such as for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

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

In some embodiments, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 20 and a plurality of battery cells 10. The case 20 has a structure having a receiving space 201 therein, and the case 20 may have various structures. In some embodiments, the case 20 may include a first portion 21 and a second portion 22, where the first portion 21 and the second portion 22 are mutually covered and together define the accommodating space 201.

Referring to fig. 2, the first portion 21 may be a hollow structure having an opening at one end, the second portion 22 may be a plate-shaped structure, and the second portion 22 covers the opening side of the first portion 21, so that the first portion 21 and the second portion 22 together define the accommodating space 201. Alternatively, each of the first portion 21 and the second portion 22 may be a hollow structure having an opening at one end, and the opening side of the first portion 21 is engaged with the opening side of the second portion 22, so that the first portion 21 and the second portion 22 together define the accommodating space 201.

The case 20 formed by the first portion 21 and the second portion 22 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In some embodiments, referring to fig. 2, the plurality of battery cells 10 may be formed into a single unit by serial connection, parallel connection or series-parallel connection, and then the single unit formed by the plurality of battery cells 10 is directly received in the receiving space 201 of the case 20. In other embodiments, the plurality of battery cells 10 may be connected in series, parallel or series-parallel, and arranged to form a plurality of battery modules, and the plurality of battery modules may be connected in series, parallel or series-parallel to form a whole and be accommodated in the accommodating space 201 of the case 20.

In some embodiments, the housing 20 of the battery 100 may be part of the chassis structure of the vehicle 1000. For example, a portion of the tank 20 may become at least a portion of the chassis of the vehicle 1000, or a portion of the tank 20 may become at least a portion of the cross and side rails of the vehicle 1000.

In some embodiments, please refer to fig. 3 and fig. 4 together, fig. 3 is a top view of a battery cell 10 provided in some embodiments of the present application, specifically, fig. 3 is a schematic diagram of the battery cell 10 provided in some embodiments of the present application under a view angle in a first direction Z referred to below, and fig. 4 is a cross-sectional view along A-A of fig. 3. Among them, the battery cell 10 may include an electrode assembly 11 and a case 12.

The electrode assembly 11 is a component in which electrochemical reactions occur in the battery cell 10. The electrode assembly 11 is mainly formed by winding or stacking a positive electrode plate and a negative electrode plate, and a diaphragm is arranged between the positive electrode plate and the negative electrode plate. The portions of the positive electrode sheet and the negative electrode sheet having active materials constitute the main body portion of the electrode assembly 11, and the portions of the positive electrode sheet and the negative electrode sheet having no active materials constitute the tabs, respectively. The tab of the positive pole piece is a positive pole tab, the tab of the negative pole piece is a negative pole tab, and the positive pole tab and the negative pole tab can be located at one end of the main body part together or located at two opposite ends of the main body part respectively.

In the battery cell 10, the number of the electrode assemblies 11 may be one or more.

In some cases, the electrode assembly 11 may also be referred to as a bare cell, a wound body, a laminate body, or the like.

In some embodiments, the battery cell 10 may also include an electrolyte that serves to conduct ions between the positive and negative electrode sheets. Among other things, the electrolytes according to embodiments of the present application may be liquid, gel-like or solid.

In some embodiments, referring to fig. 4, the case 12 may include a case 121 and an end cap 122, the case 121 and the end cap 122 being members for defining together an internal environment of the battery cell 10, the case 121 and the end cap 122 defining an internal environment for accommodating the electrode assembly 11 and the electrolyte. Wherein housing 121 and end cap 122 may be separate components. Specifically, the casing 121 has an opening, and the end cap 122 covers the opening of the casing 121 to define the internal environment of the battery cell 10 together with the casing 121, and isolate the internal environment of the battery cell 10 from the external environment. Alternatively, the case 121 and the end cap 122 may be integrally formed, and specifically, a common connection surface may be formed between the end cap 122 and the case 121 before the electrode assembly 11 is put into the case, and when the electrode assembly 11 needs to be packaged after the electrode assembly 11 is put into the case, the end cap 122 is then covered on the case 121.

Wherein the number of end caps 122 may be one. Alternatively, as shown in fig. 4, the number of the end caps 122 may be two, and two end caps 122 are provided at opposite ends of the housing 121, respectively.

Among them, the case 121 may be cylindrical, square, etc., and may be specifically determined according to the specific shape and size of the electrode assembly 11. Moreover, the materials of the housing 121 and the end cap 122 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

In some embodiments, referring to fig. 3 and 4 together, the battery cell 10 may further include an electrode terminal 13. The electrode terminal 13 refers to a member having conductive properties, and the electrode terminal 13 serves as a current transmission terminal of the battery cell 10 for transmitting current. Wherein the electrode terminal 13 may be, but is not limited to, a post.

The electrode terminal 13 is conductively connected to the electrode assembly 11. Specifically, the electrode terminal 13 is conductively connected to the tab of the electrode assembly 11. The electrode terminal 13 may be directly connected to the tab by welding, bonding, or the like. Alternatively, a switching structure 14 may be disposed between the electrode terminal 13 and the tab, and the switching structure 14 may implement switching between the electrode terminal 13 and the tab so as to enable overcurrent, thereby indirectly implementing conductive connection between the electrode terminal 13 and the tab.

The via structure 14 is a metal structure with conductive properties, such as, but not limited to, copper bars.

In some embodiments, referring to fig. 4, the number of the electrode terminals 13 is two, and the two electrode terminals 13 are respectively a positive electrode terminal and a negative electrode terminal, the positive electrode terminal is in conductive connection with the positive electrode tab of the electrode assembly 11, and the negative electrode terminal is in conductive connection with the negative electrode tab of the electrode assembly 11.

In some embodiments, referring to fig. 4, the electrode terminal 13 is disposed at the case 12. Specifically, the electrode terminal 13 may be provided in the case 121 of the case 12, or may be provided in the end cap 122 of the case 12. Wherein the positive electrode terminal and the negative electrode terminal may be simultaneously provided to the case 121. Alternatively, as shown in fig. 4, the positive electrode terminal and the negative electrode terminal are provided at the same time to the end cap 122. Alternatively, one of the positive electrode terminal and the negative electrode terminal is provided to the case 121, and the other is provided to the end cap 122.

Wherein the positive electrode terminal and the negative electrode terminal may be disposed at the same end of the case 12. Alternatively, as shown in fig. 4, the positive electrode terminal and the negative electrode terminal may be provided separately at opposite ends of the case 12.

In some embodiments, referring to fig. 4, the battery cell 10 may further include the following plastic. The lower plastic is a plastic part, and is mainly used for being arranged in the internal environment of the battery cell 10 to play a role in insulation.

The lower plastic is disposed in the casing 12 and at the end of the electrode assembly 11 having the tab 112, so as to insulate between the casing 12 and the switching structure 14, and also insulate between the casing 12 and the electrode assembly 11.

In some embodiments, referring to fig. 4, there may be two lower plastics, one of which is disposed on the side of the electrode assembly 11 having the positive electrode tab, and the other of which is disposed on the side of the electrode assembly 11 having the negative electrode tab.

Referring to fig. 3 to 6 together, fig. 5 is an enlarged view of B in fig. 4, fig. 6 is an enlarged view of C in fig. 4, and fig. 5 and 6 each show a schematic view of the electrode terminal 13, the switching structure 14, the insulating structure 15, the end cap 122, the partial case 121 and the partial electrode assembly 11 of the battery cell 10. The electrode terminal 13, the switching structure 14 and the insulating structure 15 shown in fig. 5 are a first electrode terminal 13a, a first switching structure 14a and a first insulating structure 15a, respectively, and the electrode terminal 13, the switching structure 14 and the insulating structure 15 shown in fig. 6 are a second electrode terminal 13b, a second switching structure 14b and a second insulating structure 15b, respectively. The battery cell 10 provided in the embodiment of the present application includes a case 12, an electrode terminal 13, an electrode assembly 11, and a switching structure 14. The electrode terminal 13 is provided to the case 12. The electrode assembly 11 is disposed within the case 12. The switching structure 14 is disposed in the case 12, and the switching structure 14 is electrically connected to the electrode terminal 13 and the electrode assembly 11. At least part of the transfer structure 14 is disposed at an end side of the electrode assembly 11 along the first direction Z, and a first through hole 1401 is provided therethrough along the first direction Z. The first through-hole 1401 communicates with the electrode assembly 11.

The connection structure 14 is connected to the electrode terminal 13 and the electrode assembly 11 in a conductive manner, that is, the connection structure 14 is connected to the electrode terminal 13 in a conductive manner, and the connection structure 14 is also connected to the electrode assembly 11 in a conductive manner. The connection structure 14 is electrically connected to the electrode terminal 13, which means that the connection structure 14 is connected to the electrode terminal 13, and the connection structure 14 is electrically connected to the electrode terminal 13. The connection structure 14 is electrically connected to the electrode assembly 11, which means that the connection structure 14 is connected to the electrode assembly 11, and the connection structure 14 is electrically connected to the electrode assembly 11. Based on this, the switching structure 14 may implement overcurrent between the electrode assembly 11 and the electrode terminal 13. The conductive connection may include, but is not limited to, one or more of welding, bonding, and the like. Welding may include, but is not limited to, one or more of laser welding, ultrasonic welding, penetration welding, and the like.

The switching structure 14 is in conductive connection with the electrode assembly 11, specifically, the switching structure 14 is in conductive connection with the tab of the electrode assembly 11.

At least a portion of the adapting structure 14 is disposed at an end side of the electrode assembly 11 along the first direction Z, and a first through hole 1401 is formed therethrough along the first direction Z, which means that at least a portion of the adapting structure 14 is disposed at an end side of the electrode assembly 11 along the first direction Z, and the at least a portion (i.e., a portion of the adapting structure 14 disposed at an end side of the electrode assembly 11 along the first direction Z) is formed therethrough along the first direction Z. The first through hole 1401 is a through hole penetrating through at least a portion of the adapting structure 14 along the first direction Z. The first through-hole 1401 is in communication with the electrode assembly 11, meaning that the first through-hole 1401 may be in communication with the electrode assembly 11 such that gas generated in the electrode assembly 11 may pass through the first through-hole 1401. Based on this, the first through-hole 1401 is opposite to and communicates with the electrode assembly 11 in the first direction Z.

The adaptor structure 14 may be provided with one first through hole 1401, or may be provided with a plurality of first through holes 1401 distributed at intervals. When the number of the first through holes 1401 is plural, the plurality of first through holes 1401 may improve the exhaust effect of the electrode assembly 11.

It is understood that the first direction Z is the distribution direction of at least part of the switching structure 14 and the electrode assembly 11. In some cases, the first direction Z may be a length direction or a height direction of the battery cell 10.

As shown in fig. 4, the housing 12 is provided with two first walls 122a, and the two first walls 122a are disposed opposite to each other in the first direction Z. Wherein the electrode assembly 11 is disposed within the case 12 such that the electrode assembly 11 is disposed between the two first walls 122a along the first direction Z. The adapter structure 14 is disposed within the housing 12 such that the adapter structure 14 is also disposed between the two first walls 122a along the first direction Z. Wherein the first wall 122a refers to the solid wall of the housing 12.

At least a portion of the switching structure 14 is disposed at an end side of the electrode assembly 11 along the first direction Z, which means that at least a portion of the switching structure 14 and the electrode assembly 11 are sequentially distributed along the first direction Z. Specifically, at least a portion of the switching structure 14 is disposed between the electrode assembly 11 and the first wall 122a in the first direction Z.

Wherein, as shown in fig. 4, both first walls 122a may be provided to the end cap 122. Alternatively, both the first walls 122a may be provided to the housing 121. Alternatively, one of the first walls 122a is disposed on the end cap 122, and the other first wall 122a is disposed on the housing 121.

The electrode terminal 13 according to the embodiment of the present application may be a positive electrode terminal or a negative electrode terminal. When the electrode terminal 13 is a positive electrode terminal, the switching structure 14 is electrically connected to the positive electrode terminal and the positive tab of the electrode assembly 11. When the electrode terminal 13 is a negative electrode terminal, the switching structure 14 is connected to the negative electrode terminal and the negative electrode tab of the electrode assembly 11.

It should be further noted that, the battery cell 10 includes the electrode terminal 13, the electrode assembly 11 and the switching structure 14, which means that the battery cell 10 includes at least one electrode terminal 13, at least one electrode assembly 11 and at least one switching structure 14.

Based on this, in some possible designs, as shown in fig. 4 to 6, the battery cell 10 may include two electrode terminals 13 and two switching structures 14, the two electrode terminals 13 being a first electrode terminal 13a and a second electrode terminal 13b, respectively, the two switching structures 14 being a first switching structure 14a and a second switching structure 14b, respectively, the first switching structure 14a being conductively connected to the electrode assembly 11 and the first electrode terminal 13a, and the second switching structure 14b being conductively connected to the electrode assembly 11 and the second electrode terminal 13b. As shown in fig. 4 to 6, at least part of the first switching structure 14a and at least part of the second switching structure 14b are provided at opposite ends of the electrode assembly 11 in the first direction Z; alternatively, at least part of the first switching structure 14a and at least part of the second switching structure 14b are disposed at the same end of the electrode assembly 11 in the first direction Z. As shown in fig. 4 to 6, the first adapting structure 14a and the second adapting structure 14b are each provided with a first through hole 1401 penetrating therethrough along the first direction Z; alternatively, the first adapting structure 14a or the second adapting structure 14b is provided with a first through hole 1401 therethrough.

In other possible designs, the battery cell 10 may include two electrode terminals 13 and one switching structure 14, the two electrode terminals 13 being a first electrode terminal 13a and a second electrode terminal 13b, respectively, and the switching structure 14 being a first switching structure 14a. The first switching structure 14a is conductively connected to the first electrode terminal 13a and the electrode assembly 11, and the first switching structure 14a is provided with a first through hole 1401 therethrough in the first direction Z.

The first electrode terminal 13a may be a positive electrode terminal, and the second electrode terminal 13b may be a negative electrode terminal. Alternatively, the first electrode terminal 13a may be a negative electrode terminal, and the second electrode terminal 13b may be a positive electrode terminal.

The electrode terminal 13 is provided in the case 12, and the electrode terminal 13 may be provided in the first wall 122a, or the electrode terminal 13 may be provided in a wall of the case 12 other than the first wall 122 a. When the battery cell 10 includes two electrode terminals 13, the two electrode terminals 13 may be disposed at the same first wall 122a; or may be separately provided on the two first walls 122a; may be provided on any other wall of the housing 12 than the first wall 122a; one of the electrode terminals 13 may be provided on the first wall 122a, and the other electrode terminal 13 may be provided on the other wall of the case 12 than the first wall 122 a.

The battery unit 10 provided in this embodiment is disposed at the end side of the electrode assembly 11 along the first direction Z through at least part of the switching structure 14, and a first through hole 1401 communicated with the electrode assembly 11 is disposed through along the first direction Z, so that the first through hole 1401 penetrates through at least part of the switching structure 14 along the first direction Z and is located at the end side of the electrode assembly 11 along the first direction Z. In this way, the gas generated from the electrode assembly 11 may be separated from the electrode assembly 11 through the first through-hole 1401, so that the risk of the gas generated from the electrode assembly 11 accumulating in the electrode assembly 11 may be reduced, the exhaust effect of the electrode assembly 11 may be improved, and thus the exhaust effect of the battery cell 10 may be improved.

It should be noted that, at least a portion of the through-structure 14 is disposed at an end side of the electrode assembly 11 along the first direction Z, and a first through hole 1401 is disposed therethrough along the first direction Z, so that the first through hole 1401 may be connected to the electrode assembly 11, and in particular, the first through hole 1401 may be opposite to the electrode assembly 11 along the first direction Z. In this way, the electrolyte may flow to the electrode assembly 11 through the first through-hole 1401 to infiltrate the electrode assembly 11. Thus, the problem that the electrolyte is retained in the switching structure 14 and is difficult to flow to the electrode assembly 11 can be improved, so that the electrolyte can flow to the electrode assembly 11 better, and the effect of the electrolyte infiltrating the electrode assembly 11 can be improved.

In some embodiments, please refer to fig. 4-7 in conjunction with other figures. Fig. 7 is an exploded view of a battery cell 10 according to some embodiments of the present application. The electrode assembly 11 is provided with a central hole 1101, and a first through-hole 1401 is disposed opposite to the central hole 1101 in a first direction Z.

The center hole 1101 is an opening provided at a middle position of the electrode assembly 11. The center hole 1101 penetrates at least one end of the electrode assembly 11 in the first direction Z such that the center hole 1101 may be opposite to the first through hole 1401 in the first direction Z.

In some possible designs, the pole piece and separator are wound to form a generally cylindrical electrode assembly 11 such that the pole piece and separator are circumscribed with the central aperture 1101 described above. The center hole 1101 penetrates opposite ends of the electrode assembly 11 in the axial direction of the electrode assembly 11, and a center axis of the electrode assembly 11 passes through the center hole 1101. Wherein the axial direction of the electrode assembly 11 is parallel to the axial direction of the central hole 1101 and parallel to the first direction Z.

By providing the central hole 1101 of the electrode assembly 11 opposite to the first through hole 1401, on the one hand, gas generated from the electrode assembly 11 may flow to the first through hole 1401 through the central hole 1101, so that the electrode assembly 11 may be more rapidly separated from the electrode assembly 11, the risk of gas generated from the electrode assembly 11 accumulating in the electrode assembly 11 may be reduced, the exhaust effect of the electrode assembly 11 may be improved, and the exhaust effect of the battery cell 10 may be improved. On the other hand, the first through hole 1401 and the central hole 1101 may be opposite to each other, so as to position the adaptor structure 14 in the battery cell 10, thereby facilitating the assembly operation of the battery cell 10 and improving the assembly accuracy of the battery cell 10.

Here, the first through hole 1401 is disposed opposite to the central hole 1101 along the first direction Z, which means that at least one first through hole 1401 is disposed opposite to at least one central hole 1101 along the first direction Z. It is understood that the number of the electrode assemblies 11 may be one or more in the battery cell 10. When the number of electrode assemblies 11 is one, the central hole 1101 of the electrode assembly 11 is disposed opposite to the one or more first through holes 1401 in the first direction Z. When the number of electrode assemblies 11 is plural, the center hole 1101 of one of the electrode assemblies 11 is disposed opposite to the one or more first through holes 1401 in the first direction Z; alternatively, the center holes 1101 of the plurality of electrode assemblies 11 are disposed opposite to the same first through hole 1401 in the first direction Z; alternatively, the central holes 1101 of the plurality of electrode assemblies 11 are disposed opposite to the plurality of first through holes 1401 along the first direction Z, respectively, and the number of the central holes 1101 may be the same as or different from the number of the first through holes 1401, wherein at least the case where each central hole 1101 is disposed opposite to each first through hole 1401 along the first direction Z is included.

The case where the first through-hole 1401 is disposed opposite to the central hole 1101 of the electrode assembly 11 in the first direction Z, on the basis that the positioning effect is not required, the first through-hole 1401 and the central hole 1101 are disposed opposite to each other in the first direction Z may be arbitrarily selected from the above-mentioned various cases.

On the basis that the first through hole 1401 is disposed opposite to the central hole 1101 of the electrode assembly 11 along the first direction Z for achieving the positioning effect of the adapting structure 14, a condition that one central hole 1101 is disposed opposite to one first through hole 1401 along the first direction Z is required to be satisfied. As one example, the number of the center hole 1101 and the first through holes 1401 is one, and the first through holes 1401 are disposed opposite to the center hole 1101 in the first direction Z. As another example, the number of the center holes 1101 and the first through holes 1401 is plural, and each of the first through holes 1401 is correspondingly disposed opposite to each of the center holes 1101 in the first direction Z. Thus, a positioning effect can be achieved.

In some embodiments, please refer to fig. 8 and fig. 9 together, in combination with other figures. Fig. 8 is a mating structure diagram of an end cover 122, an electrode terminal 13, an insulating structure 15, a switching structure 14, a pressure release mechanism 123 and the like of a battery cell 10 according to some embodiments of the present application, and fig. 9 is a perspective structure diagram of the switching structure 14 of the battery cell 10 according to some embodiments of the present application. The size of the first through-hole 1401 in the second direction Y is larger than the size of the first through-hole 1401 in the third direction X. The first direction Z and the second direction Y are intersected, the first direction Z and the third direction X are intersected, and the second direction Y and the third direction X are intersected.

The first through-hole 1401 has a first dimension L1 along the second direction Y, and the first through-hole 1401 has a second dimension L2 along the third direction X. The first dimension L1 is greater than the second dimension L2 such that the first through-hole 1401 is a bar-shaped hole. The first through hole 1401 may be an elliptical, rectangular, or waist-shaped through hole.

The first direction Z and the second direction Y intersect, which means that the second direction Y is not parallel to the first direction Z, that is, the first direction Z and the second direction Y may form an included angle greater than 0 ° and less than 180 °. The first direction Z and the second direction Y may or may not be perpendicular to each other. The first direction Z and the second direction Y may be directions intersecting on the same plane, or may be directions on planes different from each other, and a projection of the second direction Y on the plane in which the first direction Z is located may intersect with the first direction Z. The meaning of the intersection of the first direction Z and the third direction X, and the meaning of the intersection of the second direction Y and the third direction X may refer to the explanation of the intersection of the first direction Z and the second direction Y, and the description thereof will not be repeated here.

It should be noted here that the three directions of the first direction Z, the second direction Y, and the third direction X are not simultaneously in one plane. As one example, the first direction Z and the second direction Y are perpendicular, the first direction Z and the third direction X are perpendicular, and the second direction Y and the third direction X are perpendicular. That is, when the electrode assembly 11 has a cylindrical shape, the second direction Y and the third direction X are two mutually perpendicular radial directions of the electrode assembly 11.

By providing the size of the first through-hole 1401 in the second direction Y to be larger than the size of the first through-hole 1401 in the third direction X, the size of the first through-hole 1401 in the second direction Y can be increased while maintaining the size of the first through-hole 1401 in the third direction X. In this manner, the size of the first through-hole 1401 may be increased to improve the exhaust effect of the electrode assembly 11 and the wetting effect of the electrolyte on the electrode assembly 11.

In some embodiments, please refer to fig. 10 and fig. 11 together, in combination with other figures. Fig. 10 is a perspective view of a switching structure 14 of a battery cell 10 according to another embodiment of the present application, and fig. 11 is a perspective view of a switching structure 14 of a battery cell 10 according to another embodiment of the present application. The first through hole 1401 is provided with second through holes 1402 on opposite sides in the second direction Y; alternatively, the first through-hole 1401 is provided with the second through-hole 1402 on one side in the second direction Y.

The second through hole 1402 is disposed in the adapting structure 14 and is a through hole penetrating through the adapting structure 14. Specifically, as shown in fig. 10 and 11, the second through hole 1402 penetrates the adapting structure 14 along the first direction Z.

In some possible designs, referring to fig. 10, and in combination with other figures, at least one second via 1402 is spaced apart from the first via 1401. In other possible designs, referring to fig. 11, and in combination with other figures, at least one second through hole 1402 communicates with the first through hole 1401. In still other possible designs, the number of second through holes 1402 is plural, at least one second through hole 1402 is spaced apart from the first through hole 1401, and at least one second through hole 1402 communicates with the first through hole 1401.

It should be noted that, in the case where at least one second through hole 1402 is spaced apart from the first through hole 1401, the number of the second through holes 1402 may be one or more. When the number of the second through holes 1402 is one, the second through holes 1402 are spaced apart from the first through holes 1401. When the number of the second through holes 1402 is plural, as shown in fig. 10, among the plural second through holes 1402, each second through hole 1402 is spaced apart from the first through hole 1401; or, among the plurality of second through holes 1402, a part of the second through holes 1402 are spaced apart from the first through holes 1401, and another part of the second through holes 1402 are communicated with the first through holes 1401.

In the case where at least one second through hole 1402 communicates with the first through hole 1401, the number of the second through holes 1402 is one or more. When the number of the second through holes 1402 is one, the second through holes 1402 communicate with the first through holes 1401. When the number of the second through holes 1402 is plural, as shown in fig. 11, each of the second through holes 1402 communicates with the first through hole 1401 among the plurality of second through holes 1402; or, among the plurality of second through holes 1402, a part of the second through holes 1402 are communicated with the first through holes 1401, and another part of the second through holes 1402 are distributed at intervals from the first through holes 1401.

It is also to be noted that the second through hole 1402 communicates with the first through hole 1401, so that the second through hole 1402 and the first through hole 1401 can communicate to constitute through holes of various shapes. As an example, as shown in fig. 11, the first through-hole 1401 may communicate with the second through-holes 1402 on opposite sides in the second direction Y, such that the first through-hole 1401 and the second through-holes 1402 communicate to constitute an "H" shaped through-hole. As another example, the first through-hole 1401 may communicate with the second through-hole 1402 on one side thereof in the second direction Y, such that the first through-hole 1401 and the second through-hole 1402 communicate to constitute a "T" shaped through-hole. Of course, the first through hole 1401 and the second through hole 1402 may be connected to each other to form an "S" shaped through hole, an anisotropic shape, or the like.

By providing the second through hole 1402, the through hole provided on the adapting structure 14 can be any shape. Also, the gas generated from the electrode assembly 11 may be further separated from the electrode assembly 11 through the second through-holes 1402, so that the exhaust effect of the electrode assembly 11 may be improved. In addition, the electrolyte may infiltrate the electrode assembly 11 through the second through-holes 1402, so that the infiltration effect of the electrolyte on the electrode assembly 11 may be improved.

In some embodiments, please refer to fig. 8-11 in conjunction with other figures. The switching structure 14 is further provided with a first switching portion 1411 and a second switching portion 1412, and the first switching portion 1411 and the second switching portion 1412 are spaced apart along the third direction X. The first transfer portion 1411 is conductively connected to the electrode assembly 11, and the second transfer portion 1412 is also conductively connected to the electrode assembly 11. In the third direction X, the first through hole 1401 is provided between the first and second adapter 1411 and 1412 at intervals.

Each of the first and second transfer portions 1411 and 1412 refers to a portion of the transfer structure 14 for conductive connection with the electrode assembly 11. The first adapter 1411 may be connected to the electrode assembly 11 by welding or bonding, and the second adapter 1412 may be connected to the electrode assembly 11 by welding or bonding.

Wherein, the first switching part 1411 and the second switching part 1412 are both disposed at an end side of the electrode assembly 11 in the first direction Z.

By providing the first switching part 1411 and the second switching part 1412, the switching structure 14 has more conductive connection between the electrode assembly 11 and the structure, so that the conductive connection between the switching structure 14 and the electrode assembly 11 has larger overcurrent capability. The first through holes 1401 are arranged between the first switching part 1411 and the second switching part 1412 at intervals along the third direction X, so that the part of the switching structure 14 used for conducting connection with the electrode assembly 11 is avoided from the first through holes 1401 on the basis of ensuring that the conducting connection part of the switching structure 14 and the electrode assembly 11 has larger overcurrent capacity.

Based on the above-described structure, the first through holes 1401 are disposed between the first and second transfer portions 1411 and 1412 at intervals along the third direction X, so that the size of the first through holes 1401 along the third direction X is restricted from increasing.

By providing the size of the first through-hole 1401 in the second direction Y to be larger than the size of the first through-hole 1401 in the third direction X, the size of the first through-hole 1401 in the second direction Y can be increased to increase the size of the first through-hole 1401. In this way, the problem of the smaller aperture of the first through-hole 1401 can be improved, so that the amount of exhaust of the first through-hole 1401 can be increased, i.e., the exhaust effect of the first through-hole 1401 can be improved, to improve the exhaust effect of the electrode assembly 11.

The number of the first through holes 1401 may be set to be plural, so that the plurality of first through holes 1401 may be flexibly laid out between the first and second transfer portions 1411 and 1412, i.e., the plurality of first through holes 1401 may be laid out at any position of the transfer structure 14 between the first and second transfer portions 1411 and 1412. For example, at least two first through holes 1401 may be spaced apart in the second direction Y or may be spaced apart in the third direction X. Thus, the ratio of the arrangement of the first through holes 1401 at the position between the first and second switching parts 1411 and 1412 of the switching structure 14 can be increased, contributing to an improved exhaust effect of the electrode assembly 11.

By providing the first through-hole 1401 and the second through-hole 1402, the second through-hole 1402 and the first through-hole 1401 are sequentially distributed in the second direction Y. In this way, the layout of the second through holes 1402 can be made as free from the restriction of the first and second switching parts 1411 and 1412 in the third direction X as possible, thereby contributing to the improvement of the exhaust effect of the electrode assembly 11.

It should be noted here that, when the adapting structure 14 is provided with a through hole at a position between the first adapting portion 1411 and the second adapting portion 1412, the through hole may be divided into the first through hole 1401 or the first through hole 1401 and the second through hole 1402 according to circumstances. Note that, when the above-described through holes are used for achieving the positioning effect, there is a case where one first through hole 1401 and a corresponding one central hole 1101 are arranged opposite to each other in the first direction Z in the divided first through holes 1401. When the size of the through hole in the second direction Y is smaller than the largest size of the through hole in the third direction X, the through hole needs to be divided into a first through hole 1401 and a second through hole 1402 in the second direction Y, so that the size of the first through hole 1401 in the second direction Y is larger than the size of the first through hole 1401 in the third direction X. When the through holes are divided into the first through hole 1401 and the second through hole 1402, the divided first through hole 1401 and second through hole 1402 need to be distributed in sequence along the second direction Y.

In some embodiments, please refer to fig. 8-11 in conjunction with other figures. The switching structure 14 further includes a connection portion 1413, and the connection portion 1413 is conductively connected to the electrode terminal 13. The first through hole 1401 is disposed at the connection portion 1413, and the first adapter portion 1411 and the second adapter portion 1412 are connected to the connection portion 1413. The first transfer portion 1411 is provided to protrude in the first direction Z toward one side of the electrode assembly 11 with respect to the connection portion 1413; alternatively, the second switching part 1412 is convexly provided with respect to the connection part 1413 toward one side of the electrode assembly 11 in the first direction Z; alternatively, as shown in fig. 8 to 11, the first switching part 1411 is provided to protrude with respect to the connection part 1413 toward one side of the electrode assembly 11 in the first direction Z, and the second switching part 1412 is provided to protrude with respect to the connection part 1413 toward one side of the electrode assembly 11 in the first direction Z.

At least part of the connection portion 1413 is provided on the end side of the electrode assembly 11 in the first direction Z, and the first through-hole 1401 is provided to penetrate therethrough in the first direction Z.

The connection portion 1413 is connected to the electrode terminal 13 in a conductive manner, and the connection portion 1413 may be directly connected to the electrode terminal 13, or a second adapter 142 described below may be further provided between the connection portion 1413 and the electrode terminal 13.

The first transfer portion 1411 is arranged to protrude toward one side of the electrode assembly 11 along the first direction Z relative to the connection portion 1413, so that the first transfer portion 1411 can abut against the tab of the electrode assembly 11 along the first direction Z, and the conductive connection relationship between the tab of the electrode assembly 11 and the first transfer portion 1411 can be better realized and maintained.

By the second switching part 1412 protruding toward one side of the electrode assembly 11 along the first direction Z with respect to the connection part 1413, the second switching part 1412 can abut against the tab of the electrode assembly 11 along the first direction Z, so that the conductive connection relationship between the tab of the electrode assembly 11 and the second switching part 1412 can be better achieved and maintained.

In some embodiments, please refer to fig. 12 in conjunction with other figures. Fig. 12 is an exploded view of the structure shown in fig. 8, and fig. 12 shows electrode terminals 13, end caps 122, pressure release mechanism 123, insulating structure 15, and switching structure 14 of battery cell 10 provided in some embodiments of the present application. The first transfer portion 1411 is concavely disposed with respect to the connection portion 1413 along a side of the first direction Z remote from the electrode assembly 11; alternatively, the second switching part 1412 is concavely disposed with respect to the connection part 1413 along the side of the first direction Z away from the electrode assembly 11; alternatively, as shown in fig. 12, the first switching part 1411 is concavely disposed with respect to the connection part 1413 on a side away from the electrode assembly 11 in the first direction Z, and the second switching part 1412 is concavely disposed with respect to the connection part 1413 on a side away from the electrode assembly 11 in the first direction Z.

The first switching part 1411 is concavely arranged relative to the connecting part 1413 on the side far away from the electrode assembly 11 along the first direction Z, so that the first switching part 1411 is convexly arranged relative to the connecting part 1413 on the side facing the electrode assembly 11 along the first direction Z, and the weight of the switching structure 14 can be reduced, so that the energy density of the battery cell 10 can be improved.

The second adapting part 1412 is concavely disposed with respect to the connection part 1413 along the first direction Z at a side far from the electrode assembly 11, so that the second adapting part 1412 is convexly disposed with respect to the connection part 1413 along the first direction Z toward a side of the electrode assembly 11, and the weight of the adapting structure 14 can be reduced, so that the energy density of the battery cell 10 can be improved.

In some embodiments, please refer to fig. 8-12 in conjunction with other figures. In a direction in which the first transition 1411 extends toward opposite ends in the center of the second direction Y, the distance between the first transition 1411 and the first through-hole 1401 in the third direction X is gradually increased. Alternatively, in a direction in which the second adapter 1412 extends toward opposite ends along the center of the second direction Y, the distance between the second adapter 1412 and the first through hole 1401 along the third direction X increases. Alternatively, as shown in fig. 8 to 12, in a direction in which the first transfer portion 1411 extends toward opposite ends in the center of the second direction Y, the distance between the first transfer portion 1411 and the first through hole 1401 in the third direction X is gradually increased, and in a direction in which the second transfer portion 1412 extends toward opposite ends in the center of the second direction Y, the distance between the second transfer portion 1412 and the first through hole 1401 in the third direction X is gradually increased.

As shown in fig. 9, fig. 9 shows a first distance L3 and a second distance L4. The first distance L3 is a distance between the center of the first adaptor 1411 along the second direction Y and the first through hole 1401 in the third direction X, and is a minimum distance between the first adaptor 1411 and the first through hole 1401 in the third direction X. The second distance L4 is a distance between the center of the second adapter 1412 along the second direction Y and the first through hole 1401 in the third direction X, and is a minimum distance between the second adapter 1412 and the first through hole 1401 in the third direction X.

In a direction in which the first transfer portion 1411 extends toward opposite ends in the center of the second direction Y, the distance between the first transfer portion 1411 and the first through hole 1401 in the third direction X is gradually increased, meaning that the distance between the first transfer portion 1411 and the first through hole 1401 in the third direction X is gradually increased from the center of the first transfer portion 1411 in the second direction Y toward opposite ends. That is, the farther the first transfer portion 1411 is from the center in the second direction Y, the greater the distance from the first through-hole 1401 in the third direction X; the closer the first transfer portion 1411 is to the center in the second direction Y, the smaller the distance from the first through-hole 1401 in the third direction X.

In the direction in which the second adapter 1412 extends toward opposite ends along the center of the second direction Y, the distance between the second adapter 1412 and the first through hole 1401 along the third direction X increases, which means that the distance between the second adapter 1412 and the first through hole 1401 along the third direction X increases gradually from the center of the second adapter 1412 along the second direction Y toward opposite ends. That is, the farther the second adapter 1412 is from the center in the second direction Y, the greater the distance from the first through hole 1401 in the third direction X; the closer the second adapter 1412 is to the center in the second direction Y, the smaller the distance from the first through hole 1401 in the third direction X.

By adopting the above technical scheme, the transfer structure 14 has larger space layout second through holes 1402 on two opposite sides of the first through hole 1401 along the second direction Y, so as to facilitate improving the exhaust effect of the electrode assembly 11 and the infiltration effect of the electrolyte on the electrode assembly 11.

In some embodiments, please refer to fig. 9 in conjunction with other figures. The distance between the first through hole 1401 and the first transfer portion 1411 is 0.1mm or more. Alternatively, the distance between the first through hole 1401 and the second adapter 1412 is 0.1mm or more. Alternatively, the distance between the first through hole 1401 and the first transfer portion 1411 is 0.1mm or more, and the distance between the first through hole 1401 and the second transfer portion 1412 is 0.1mm or more.

The distance between the first through hole 1401 and the first transfer portion 1411 is 0.1mm or more, which means that the minimum distance between the first through hole 1401 and the first transfer portion 1411 is 0.1mm or more. The minimum distance between the first through hole 1401 and the first transfer portion 1411 is a first distance L3, which is the dimension of the first through hole 1401 along the third direction X toward the edge of the first transfer portion 1411 and the first transfer portion 1411 along the third direction X. The first distance L3 is 0.1mm or more, and specifically may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, etc.

The distance between the first through hole 1401 and the second adapter 1412 is 0.1mm or more, which means that the minimum distance between the first through hole 1401 and the second adapter 1412 is 0.1mm or more. The minimum distance between the first through hole 1401 and the second adapting portion 1412 is the second distance L4, which is the dimension of the first through hole 1401 along the third direction X toward the edge of the second adapting portion 1412 and the second adapting portion 1412 along the third direction X. The second distance L4 is 0.1mm or more, and specifically may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, etc.

The first through hole 1401 and the first switching part 1411 have a certain distance therebetween, so that the first switching part 1411 is formed conveniently, and the switching structure 14 and the electrode assembly 11 are connected in a conductive manner.

The first through hole 1401 and the second switching part 1412 have a certain distance, so that the second switching part 1412 is formed conveniently, and the switching structure 14 is connected with the electrode assembly 11 in a conductive way.

In some embodiments, please refer to fig. 9 in conjunction with other figures. The distance between the first through hole 1401 and the first transfer portion 1411 is 0.2mm or more. Alternatively, the distance between the first through hole 1401 and the second adapter 1412 is 0.2mm or more. Alternatively, the distance between the first through hole 1401 and the first transfer portion 1411 is 0.2mm or more, and the distance between the first through hole 1401 and the second transfer portion 1412 is 0.2mm or more.

The distance between the first through hole 1401 and the first transfer portion 1411 is 0.2mm or more, and the first distance L3 is 0.2mm or more, and specifically, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, and the like may be used.

The distance between the first through hole 1401 and the second adapter 1412 is 0.2mm or more, and the second distance L4 is 0.2mm or more, specifically, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, etc.

By adopting the above technical scheme, a larger distance can be provided between the first through hole 1401 and the first switching portion 1411, so that the first switching portion 1411 is formed conveniently, and the switching structure 14 and the electrode assembly 11 are connected in a conductive manner.

By adopting the above technical solution, a larger distance can be further provided between the first through hole 1401 and the second adapting portion 1412, so as to facilitate the formation of the second adapting portion 1412, and facilitate the conductive connection between the adapting structure 14 and the electrode assembly 11.

In some embodiments, please refer to fig. 8 in conjunction with other figures. The housing 12 is provided with a pressure relief mechanism 123, and a first through hole 1401 communicates with the pressure relief mechanism 123.

The pressure release mechanism 123 is a member that can release the internal pressure of the battery cell 10 when the internal pressure or temperature of the battery cell 10 reaches a threshold value. For example, when the battery cell 10 is operating normally, the gas pressure inside the battery cell 10 is smaller than the opening pressure value of the pressure release mechanism 123, the pressure release mechanism 123 is in a closed state, and the gas inside the battery cell 10 and the gas outside are not communicated with each other. When the battery cell 10 is thermally out of control under the action of internal and external factors such as overcharge, overdischarge, overheat, mechanical collision and the like, a large amount of high-temperature and high-pressure gas is generated in the battery cell 10, so that the pressure in the battery cell 10 is higher than the opening pressure value of the pressure relief mechanism 123, the pressure relief mechanism 123 is changed from the closed state to the open state, and the high-temperature and high-pressure gas in the battery cell 10 can be discharged out of the battery cell 10 through the pressure relief mechanism 123.

The pressure release mechanism 123 may be a weak structure provided in the housing 12, or the pressure release mechanism 123 may be a pressure valve or the like. When the pressure release mechanism 123 is of a weak structure, the structural strength of the pressure release mechanism 123 is lower than that of other positions of the housing 12. In this way, when thermal runaway occurs in the battery cell 10, the high-temperature and high-pressure gas generated by the battery cell 10 may break the pressure release mechanism 123 to be released outside the battery cell 10. As one example, pressure relief mechanism 123 may be integrally formed with housing 12. For example, the pressure release mechanism 123 is a score provided in the housing 12. As another example, the pressure relief mechanism 123 may also be provided separately from and connected to the housing 12.

The pressure release mechanism 123 is provided in the casing 12, and the pressure release mechanism 123 may be provided in the casing 121, or the pressure release mechanism 123 may be provided in the end cover 122. The pressure release mechanism 123 may be provided on the first wall 122a of the housing 12, or may be provided on other walls of the housing 12 than the first wall 122 a. When the pressure release mechanism 123 is disposed on the first walls 122a, one of the first walls 122a may be provided with the pressure release mechanism 123, or both of the first walls 122a may be provided with the pressure release mechanism 123.

The first through hole 1401 and the pressure release mechanism 123 are in communication, which means that a medium such as gas or liquid can flow between the first through hole 1401 and the pressure release mechanism 123.

The first through-hole 1401 and the pressure release mechanism 123 are communicated, so that gas generated by the electrode assembly 11 can flow to the pressure release mechanism 123 through the first through-hole 1401 to be released through the pressure release mechanism 123, thereby realizing the pressure release of the battery cell 10. In this way, thermal runaway protection of the battery cell 10 may be achieved to improve the reliability performance of the battery cell 10.

In some embodiments, please refer to fig. 5-12 in conjunction with other figures. The adapter structure 14 includes a first adapter 141 and a second adapter 142 disposed on the first adapter 141, at least a portion of the first adapter 141 is disposed on an end side of the electrode assembly 11 along the first direction Z, and a first through hole 1401 is disposed therethrough along the first direction Z. The first tab 141 is conductively connected to the electrode assembly 11. The second adaptor 142 is conductively connected to the electrode terminal 13, and the second adaptor 142 is spaced apart from the first through hole 1401.

The first tab 141 refers to a portion of the switching structure 14 for conductive connection with the electrode assembly 11, and the second tab 142 refers to a portion of the switching structure 14 for conductive connection with the electrode terminal 13. It will be appreciated that both the first and second adapters 141 and 142 have conductive properties. The second adaptor 142 is disposed on the first adaptor 141, so that the second adaptor 142 and the first adaptor 141 are in communication. Based on this, the first and second adapters 141 and 142 are electrically connected to the electrode assembly 11, and the second adapter 142 is electrically connected to the electrode terminal 13, and the first and second adapters 141 and 142 are electrically connected to indirectly realize the electrical connection between the electrode terminal 13 and the electrode assembly 11.

As shown in fig. 5 to 12, the first through hole 1401 penetrates the first adapter 141 in the first direction Z. The first adaptor 141 is provided with the first adaptor 1411 and the second adaptor 1412, and the first adaptor 141 further includes the connecting portion 1413. Wherein the second adapter 142 is connected to at least one of the connection portion 1413, the first adapter 1411, and the second adapter 1412.

By providing the first and second transfer members 141 and 142, the transfer structure 14 is facilitated to be conductively connected to the electrode assembly 11 and the electrode terminal 13. And, the second adapter 142 is spaced apart from the first through-hole 1401 to facilitate the exhaustion of the first through-hole 1401, thereby improving the exhaustion effect of the electrode assembly 11.

In some embodiments, please refer to fig. 5-12 in conjunction with other figures. The second adapter 142 is bent with respect to the first adapter 141, and at least a portion of the second adapter 142 is spaced apart from one end of the first through hole 1401, which is remote from the electrode assembly 11 in the first direction Z.

The second adaptor 142 is bent and arranged relative to the first adaptor 141, so that the second adaptor 142 has a certain elastic property relative to the first adaptor 141. In this way, the second adapter 142 is facilitated to abut against the electrode terminal 13 to achieve and maintain the conductive connection of the electrode terminal 13 and the second adapter 142. At least a portion of the second adapter 142 is spaced apart from one end of the first through hole 1401, which is far away from the electrode assembly 11 in the first direction Z, so that the second adapter 142 can better avoid the first through hole 1401, thereby facilitating the exhaust of the first through hole 1401 and improving the exhaust effect of the electrode assembly 11. In addition, the second adapter 142 is also facilitated to be conductively connected to the electrode terminal 13 on the first wall 122 a.

In some embodiments, please refer to fig. 12 in conjunction with other figures. In order to enhance the abutting effect of the second adapter 142 against the electrode terminal 13, the second adapter 142 itself may also be provided in a curved shape to enhance its elastic performance.

In some embodiments, please refer to fig. 5-12 in conjunction with other figures. The housing 12 is provided with a pressure release mechanism 123, the pressure release mechanism 123 and the first through hole 1401 being distributed in sequence along the second direction Y. The second adaptor 142 is provided with a first end side 1421, and the first end side 1421 is used for being connected with the first adaptor 141. The first end side 1421 is located at a side of the first through hole 1401 away from the pressure release mechanism 123 along the second direction Y, and the second adapter 142 and the first adapter 141 enclose to form an exhaust space 1403, where the exhaust space 1403 is communicated with the first through hole 1401 and the pressure release mechanism 123.

In some possible designs, the pressure relief mechanism 123 may be linearly distributed with the first throughbore 1401 along the second direction Y. For example, the pressure release mechanism 123 is disposed on a side wall of the housing 12 along the second direction Y, instead of the first wall 122a. In other possible designs, as shown in fig. 8 and 12, the pressure relief mechanism 123 may be spaced apart from the first throughbore 1401 along the first direction Z and spaced apart from the first throughbore 1401 along the second direction Y. For example, as shown in fig. 8 and 12, the pressure release mechanism 123 is disposed on the first wall 122a of the housing 12 along the first direction Z, and the pressure release mechanism 123 and the first through hole 1401 are spaced apart along the second direction Y.

The exhaust space 1403 is a space communicating with the pressure release mechanism 123 and the first through hole 1401, respectively. As an example, as shown in fig. 5 to 8 and 12, at least a portion of the second adapter 142 is located at an end of the first through hole 1401 away from the electrode assembly 11 in the first direction Z to enclose the first adapter 141 to form the exhaust space 1403, such that the exhaust space 1403 is located at an end of the first through hole 1401 away from the electrode assembly 11 in the first direction Z and is in communication with the first through hole 1401 and the pressure relief mechanism 123.

The exhaust space 1403 is formed by enclosing the second adapter piece 142 and the first adapter piece 141, and the exhaust space 1403 is communicated with the first through hole 1401 and the pressure release mechanism 123, so that the gas generated by the electrode assembly 11 can flow to the pressure release mechanism 123 through the first through hole 1401 and the exhaust space 1403 in sequence, and release is realized through the pressure release mechanism 123. By disposing the first end side 1421 of the second adapter 142 on the side of the first through hole 1401 away from the pressure release mechanism 123 in the second direction Y, the connection between the second adapter 142 and the first adapter 141 can be made as free as possible from blocking the flow of gas between the first through hole 1401 and the pressure release mechanism 123, so that the exhaust effect of the electrode assembly 11 can be improved.

In addition, the pressure release mechanism 123 and the first through hole 1401 are sequentially distributed along the second direction Y, and the first end side 1421 of the second adapter 142 is disposed on the side of the first through hole 1401 away from the pressure release mechanism 123 along the second direction Y, so that the first through hole 1401 can be as close to the pressure release mechanism 123 as possible on the basis that the size of the first through hole 1401 along the second direction Y is larger than the size of the first through hole 1401 along the third direction X, so that the first through hole 1401 has a larger size along the second direction Y, so as to guide the gas of the electrode assembly 11 to the pressure release mechanism 123. In this way, the exhaust effect of the electrode assembly 11 can be improved.

In some embodiments, please refer to fig. 4-6 in conjunction with other figures. The battery cell 10 further includes an insulating structure 15, the insulating structure 15 is disposed in the housing 12, and at least a portion of the insulating structure 15 is disposed between a side of the switching structure 14 away from the electrode assembly 11 along the first direction Z and the housing 12.

The insulating structure 15 refers to a member for achieving an insulating effect between the housing 12 and the relay structure 14. The insulating structure 15 may be a plastic piece, for example, the lower plastic referred to above. The insulating structure 15 may be a structural member made of other materials having insulating properties.

The insulating structure 15 is disposed within the housing 12 such that at least a portion of the insulating structure 15 is disposed between the two first walls 122a along the first direction Z.

At least a portion of the insulating structure 15 is disposed between the side of the switching structure 14 remote from the electrode assembly 11 and the case 12 in the first direction Z, meaning that at least a portion of the insulating structure 15 is disposed between the switching structure 14 and the first wall 122a in the first direction Z to separate the switching structure 14 and the first wall 122a in the first direction Z, thereby achieving insulation between the switching structure 14 and the case 12.

It should be noted that the battery cell 10 includes an insulating structure 15, which means that the battery cell 10 includes at least one insulating structure 15. In some possible designs, the battery cell 10 may include an insulating structure 15, and the insulating structure 15 may be a first insulating structure 15a or a second insulating structure 15b. In other possible designs, as shown in fig. 4 to 6, the battery cell 10 may also include two insulating structures 15, the two insulating structures 15 being a first insulating structure 15a and a second insulating structure 15b, respectively. Wherein at least a portion of the first insulating structure 15a is disposed between the first switching structure 14a and the first wall 122a along the first direction Z, and at least a portion of the second insulating structure 15b is disposed between the second switching structure 14b and the first wall 122a along the first direction Z.

By providing the insulating structure 15, insulation between the switching structure 14 and the housing 12 can be achieved to improve the reliability of the battery cell 10.

In some embodiments, please refer to fig. 5-8, 12-14 in combination with other figures. Fig. 13 is a perspective view of an insulating structure 15 of a battery cell 10 according to some embodiments of the present application, and fig. 14 is a mating structure of the insulating structure 15, an electrode terminal 13, a pressure release mechanism 123, and an end cover 122 of the battery cell 10 according to some embodiments of the present application. The insulating structure 15 includes an insulating member 151 and an insulating boss 152. At least a portion of the insulating member 151 is disposed between a side of the switching structure 14 remote from the electrode assembly 11 in the first direction Z and the case 12. The insulation boss 152 is disposed on a side of the insulation member 151 facing the adapting structure 14 along the first direction Z, and abuts against the adapting structure 14 along the first direction Z.

The insulating member 151 and the insulating boss 152 are both members of the insulating structure 15, and have insulating properties.

At least a portion of the insulating member 151 is disposed between the side of the switching structure 14 remote from the electrode assembly 11 and the case 12 in the first direction Z, meaning that at least a portion of the insulating member 151 is disposed between the switching structure 14 and the first wall 122a in the first direction Z to separate the switching structure 14 and the first wall 122a in the first direction Z, thereby achieving insulation between the switching structure 14 and the case 12.

The insulation boss 152 abuts against the adaptor structure 14 along the first direction Z, specifically, the insulation boss 152 abuts against the first adaptor 141 along the first direction Z. Wherein the insulation boss 152 may abut against at least one of the connection portion 1413, the first transfer portion 1411, and the second transfer portion 1412 of the first transfer member 141 in the first direction Z.

The insulating boss 152 is arranged on one side of the insulating piece 151 facing the switching structure 14 along the first direction Z, and the switching structure 14 is abutted against the switching structure 14 along the first direction Z, so that the switching structure 14 can be abutted against the tab of the electrode assembly 11 under the abutting action of the insulating boss 152, and the conductive connection between the switching structure 14 and the electrode assembly 11 is convenient to achieve and maintain.

In some embodiments, please refer to fig. 5-8, 13 and 14 in combination with other figures. The insulating boss 152 is provided with a recess 1501, at least part of the recess 1501 extending through the insulating boss 152 towards one side of the interposer fabric 14 in the first direction Z.

By providing the grooves 1501, a weight reduction effect of the insulating structure 15 can be achieved to help increase the energy density of the battery cell 10. And, at least part of the grooves 1501 penetrate through the insulating boss 152 toward one side of the switching structure 14 in the first direction Z, so that the electrolyte in the grooves 1501 may flow to the electrode assembly 11 to infiltrate the electrode assembly 11. In this manner, the problem of electrolyte accumulation within the insulating structure 15 may be ameliorated to help improve the effect of electrolyte wetting the electrode assembly 11.

In some embodiments, the recess 1501 may be in communication with the first throughbore 1401. In this way, the electrolyte in the grooves 1501 may flow to the electrode assembly 11 through the first through holes 1401 to infiltrate the electrode assembly 11, and also helps to improve the infiltration effect of the electrode assembly 11.

In some embodiments, please refer to fig. 8, 12-14 in conjunction with other figures. The housing 12 is provided with a pressure relief mechanism 123, and the insulating member 151 is provided with a vent groove 1502, the vent groove 1502 being opposite to the pressure relief mechanism 123 in the first direction Z. The insulating boss 152 is provided with a relief groove 1503, the relief groove 1503 is used to relieve the exhaust groove 1502, and the relief groove 1503 communicates with the first through hole 1401. The pressure release mechanism 123 is disposed opposite the electrode assembly 11 through the exhaust groove 1502 and the escape groove 1503.

The exhaust groove 1502 refers to a through groove of the insulating member 151 for opposing the pressure release mechanism 123 in the first direction Z. Specifically, as shown in fig. 8 and 12 to 14, the pressure release mechanism 123 is disposed on the first wall 122a of the housing 12, the exhaust slot 1502 penetrates the insulating member 151 along the first direction Z, and the exhaust slot 1502 is opposite to the pressure release mechanism 123 along the first direction Z.

The escape groove 1503 is a groove for escaping the exhaust groove 1502 formed by the insulating boss 152, and the escape groove 1503 communicates with the exhaust groove 1502. Specifically, as shown in fig. 8, 12 to 14, the escape groove 1503 and the exhaust groove 1502 are disposed in communication in the first direction Z.

The pressure release mechanism 123 and the electrode assembly 11 are oppositely arranged through the exhaust groove 1502 and the avoidance groove 1503, which means that the pressure release mechanism 123 and the exhaust groove 1502 are opposite along the first direction Z, the exhaust groove 1502 and the avoidance groove 1503 are sequentially distributed and communicated along the first direction Z, the avoidance groove 1503 is opposite to the electrode assembly 11 along the first direction Z, and the pressure release mechanism 123 is opposite to the electrode assembly 11 along the first direction Z.

As shown in fig. 8 and 12 to 14, the first adapter 141 and the second adapter 142 define the exhaust space 1403, and the exhaust space 1403 is communicated with the first through hole 1401 and is communicated with the escape groove 1503, so that the first through hole 1401 is communicated with the escape groove 1503.

By adopting the above technical solution, the gas generated by the electrode assembly 11 can flow to the pressure release mechanism 123 along the first direction Z through the avoiding groove 1503 and the exhaust groove 1502 in sequence, so as to be released through the pressure release mechanism 123. The gas generated from the electrode assembly 11 may also flow to the pressure relief mechanism 123 through the first through hole 1401, the exhaust space 1403, the escape groove 1503, and the exhaust groove 1502 in this order to be released through the pressure relief mechanism 123. So set up, the gas that the electrode assembly 11 of being convenient for produced flows to relief mechanism 123 to release through relief mechanism 123, can improve the exhaust effect of electrode assembly 11, with the pressure release effect of improving battery cell 10, make battery cell 10 have higher reliability.

In some embodiments, please refer to fig. 3, fig. 7 and fig. 12 in combination with other figures. The housing 12 is provided with first walls 122a at opposite ends in the first direction Z, at least one of the first walls 122a being provided with a liquid injection hole 1201, the liquid injection hole 1201 being in communication with the first through hole 1401.

The filling hole 1201 refers to an opening provided in the first wall 122a for allowing electrolyte to enter the internal environment of the battery cell 10. Wherein both first walls 122a are provided with a filling hole 1201, or wherein one of the first walls 122a is provided with a filling hole 1201.

By adopting the above technical scheme, electrolyte can be injected into the battery cell 10 through the injection hole 1201, and at this time, the electrolyte can be directly injected into the electrode assembly 11 through the injection hole 1201 to infiltrate the electrode assembly 11. Electrolyte may also be injected into the electrode assembly 11 through the first through-hole 1401 to infiltrate the electrode assembly 11. By arranging in this way, the electrolyte can infiltrate the electrode assembly 11 as much as possible, so that the electrolyte can be prevented from stagnating in the switching structure 14 without infiltrating the electrode assembly 11, and the effect of the electrolyte infiltrating the electrode assembly 11 can be improved.

In some embodiments, please refer to fig. 4-6 in conjunction with other figures. The electrode terminals 13 are provided in two and divided into a first electrode terminal 13a and a second electrode terminal 13b. The housing 12 is provided with a first adapting structure 14a and a second adapting structure 14b, and at least one of the first adapting structure 14a and the second adapting structure 14b is the adapting structure 14. The first and second switching structures 14a and 14b are respectively provided at opposite ends of the electrode assembly 11 in the first direction Z, and the first and second electrode terminals 13a and 13b are respectively provided at opposite ends of the case 12 in the first direction Z. The first switching structure 14a is conductively connected to the first electrode terminal 13a and the electrode assembly 11, and the second switching structure 14b is conductively connected to the second electrode terminal 13b and the electrode assembly 11.

As can be appreciated, the first electrode terminal 13a and the second electrode terminal 13b are respectively disposed on two first walls 122a of the case 12, the first switching structure 14a is disposed between the electrode assembly 11 and one of the first walls 122a along the first direction Z, and the second switching structure 14b is disposed between the electrode assembly 11 and the other first wall 122a along the first direction Z.

When the first transfer structure 14a is the transfer structure 14, the first transfer structure 14a is provided with a first through hole 1401 communicating with the electrode assembly 11 in the first direction Z. When the second transfer structure 14b is the transfer structure 14, the second transfer structure 14b is provided with a first through hole 1401 communicating with the electrode assembly 11 along the first direction Z. As can be appreciated, the first switching structure 14a is provided with a first through hole 1401 communicating with the electrode assembly 11 therethrough in the first direction Z; alternatively, the second adapting structure 14b is provided with a first through hole 1401 therethrough along the first direction Z; alternatively, as shown in fig. 4 to 6, the first and second switching structures 14a and 14b are each provided with a first through hole 1401 therethrough along the first direction Z.

By adopting the above technical solution, the opposite ends of the casing 12 along the first direction Z are respectively provided with the first electrode terminal 13a and the second electrode terminal 13b, and the first electrode terminal 13a is in conductive connection with the electrode assembly 11 through the first switching structure 14a, and the second electrode terminal 13b is in conductive connection with the electrode assembly 11 through the second switching structure 14 b.

In some embodiments, please refer to fig. 2-4 and fig. 7 in combination with other drawings. The battery cell 10 has a cylindrical shape.

Wherein, the electrode assembly 11 and the shell 12 are both cylindrical.

So arranged, the cell 10 is a cylindrical cell.

Please refer to fig. 2 in combination with other figures. The battery 100 provided in the embodiment of the present application includes a battery cell 10. The battery cell 10 in this embodiment is the same as the battery cell 10 in the previous embodiment, and specific reference is made to the description of the battery cell 10 in the previous embodiment, which is not repeated here.

The battery 100 provided in the embodiment of the present application can improve the exhaust effect of the battery cell 10 by adopting the battery cell 10 related to the above, and further can improve the exhaust effect of the battery 100.

Referring to fig. 1, an electrical device provided in an embodiment of the present application includes a battery cell 10 or a battery 100. The battery cell 10 and the battery 100 in the present embodiment are the same as the battery cell 10 and the battery 100 in the previous embodiment, and refer to the related descriptions of the battery cell 10 and the battery 100 in the previous embodiment, which are not repeated here.

According to the power utilization device, through the adoption of the battery cell 10 or the battery 100, the exhaust effect of the battery cell 10 can be improved, and then the exhaust effect of the battery 100 can be improved, so that the power utilization device has higher reliability.

As one of the embodiments of the present application, as shown in fig. 4 to 14, the battery cell 10 includes a case 12, an electrode assembly 11, an electrode terminal 13, and a switching structure 14. The electrode terminal 13 is disposed in the case 12, and the electrode assembly 11 and the switching structure 14 are disposed in the case 12. The electrode assembly 11 is provided with a center hole 1101 therethrough in the first direction Z. The switching structure 14 includes a first switching member 141 and a second switching member 142 disposed on the first switching member 141, at least a portion of the first switching member 141 is disposed on an end side of the electrode assembly 11 along the first direction Z, and a first through hole 1401 is disposed therethrough along the first direction Z. The first through hole 1401 is disposed opposite to the central hole 1101 in the first direction Z. The first adapter 141 is provided with first adapter portions 1411 and second adapter portions 1412 that are spaced apart along the third direction X. In the third direction X, the first through hole 1401 is provided between the first and second adapter 1411 and 1412 at intervals. The size of the first through-hole 1401 in the second direction Y is larger than the size of the first through-hole 1401 in the third direction X. The first and second transfer portions 1411 and 1412 are welded to the tabs of the electrode assembly 11, and the second transfer member 142 is welded to the electrode terminal 13.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. A battery cell, comprising:

a housing;

an electrode terminal provided to the case;

an electrode assembly disposed within the housing;

the switching structure is arranged in the shell and is connected with the electrode terminal and the electrode assembly in a conducting manner; at least part of the switching structure is arranged at the end side of the electrode assembly along the first direction, and a first through hole communicated with the electrode assembly is arranged in a penetrating way along the first direction;

2. The battery cell of claim 1, wherein the electrode assembly is provided with a central aperture, the first through-hole being disposed opposite the central aperture along the first direction.

3. The battery cell according to claim 1, wherein one side or opposite sides of the first through hole along the second direction are provided with second through holes;

at least one second through hole is communicated with the first through hole, and/or at least one second through hole is distributed with the first through hole at intervals.

4. The battery cell according to claim 1, wherein the switching structure is further provided with a first switching part and a second switching part, the first switching part and the second switching part are distributed at intervals along the third direction and are connected to the electrode assembly in a conductive manner; the first through holes are arranged between the first switching part and the second switching part at intervals.

5. The battery cell as defined in claim 4, wherein the switching structure further comprises a connection part conductively connected to the electrode terminal, the first through hole is provided in the connection part, and the first switching part and the second switching part are both connected to the connection part; the first transfer part is provided to protrude with respect to the connection part toward one side of the electrode assembly in the first direction, and/or the second transfer part is provided to protrude with respect to the connection part toward one side of the electrode assembly in the first direction.

6. The battery cell as recited in claim 5, wherein the first transition portion is recessed relative to the connection portion along a side of the first direction away from the electrode assembly; and/or, the second transfer part is concavely arranged relative to the connecting part along one side of the first direction away from the electrode assembly.

7. The battery cell according to claim 4, wherein the first transfer portion and the first through hole are disposed at increasing distances along the third direction in a direction in which a center of the first transfer portion along the second direction extends toward opposite ends;

and/or, in the direction that the center of the second adapting part along the second direction extends to the opposite ends, the distance between the second adapting part and the first through hole along the third direction is gradually increased.

8. The battery cell according to claim 4, wherein a distance between the first through hole and the first transfer portion is 0.1mm or more; and/or, the distance between the first through hole and the second switching part is more than 0.1 mm.

9. The battery cell according to claim 8, wherein a distance between the first through hole and the first transfer portion is 0.2mm or more; and/or, the distance between the first through hole and the second switching part is more than 0.2 mm.

10. The battery cell of any one of claims 1-9, wherein the housing is provided with a pressure relief mechanism, the first through-hole being in communication with the pressure relief mechanism.

11. The battery cell according to any one of claims 1 to 9, wherein the switching structure includes a first switching member and a second switching member provided to the first switching member, at least part of the first switching member being provided to an end side of the electrode assembly in the first direction, and the first through hole being provided therethrough in the first direction; the first adapter is connected to the electrode assembly in a conductive manner; the second adapter is connected to the electrode terminal in a conducting manner and is arranged at intervals with the first through hole.

12. The battery cell of claim 11, wherein the second adapter is folded relative to the first adapter and at least partially spaced apart from one end of the first through hole away from the electrode assembly in the first direction.

13. The battery cell of claim 11, wherein the housing is provided with a pressure relief mechanism, the pressure relief mechanism and the first through-hole being distributed sequentially along a second direction; the second adapter is provided with a first end side used for being connected with the first adapter, the first end side is arranged at one side of the first through hole away from the pressure relief mechanism along the second direction at intervals, and the second adapter and the first adapter are enclosed to form an exhaust space communicated with the first through hole and the pressure relief mechanism; the second direction intersects the first direction.

14. The battery cell of any one of claims 1-9, further comprising an insulating structure disposed within the housing and at least partially between a side of the transfer structure remote from the electrode assembly in the first direction and the housing.

15. The battery cell of claim 14, wherein the insulating structure comprises:

an insulating member at least partially disposed between one side of the switching structure away from the electrode assembly in the first direction and the case;

the insulation boss is arranged on one side, facing the switching structure, of the insulation piece along the first direction, and abuts against the switching structure along the first direction.

16. The battery cell of claim 15, wherein the insulating boss is provided with a groove at least partially through the insulating boss toward one side of the adapter structure in the first direction.

17. The battery cell as recited in claim 15, wherein the housing is provided with a pressure relief mechanism, the insulator is provided with a vent slot opposite to the pressure relief mechanism in the first direction, the insulating boss is provided with a relief slot for relieving the vent slot and communicating with the first through hole, and the pressure relief mechanism is disposed opposite to the electrode assembly through the vent slot and the relief slot.

18. The battery cell of any one of claims 1-9, wherein the housing is provided with first walls at opposite ends along the first direction, at least one of the first walls being provided with a fluid injection hole, the fluid injection hole being in communication with the first through hole.

19. The battery cell according to any one of claims 1 to 9, wherein the electrode terminals are provided in two and divided into a first electrode terminal and a second electrode terminal; a first switching structure and a second switching structure are arranged in the shell, and the first switching structure and/or the second switching structure are/is the switching structure; the first switching structure and the second switching structure are respectively arranged at two opposite ends of the electrode assembly along the first direction, and the first electrode terminal and the second electrode terminal are respectively arranged at two opposite ends of the shell along the first direction; the first switching structure is connected to the first electrode terminal and the electrode assembly in a conductive manner, and the second switching structure is connected to the second electrode terminal and the electrode assembly in a conductive manner.

20. The battery cell of any one of claims 1-9, wherein the battery cell is cylindrical.

21. A battery comprising a cell according to any one of claims 1-20.

22. An electrical device comprising a battery cell according to any one of claims 1-20 or a battery according to claim 21.