CN216389437U

CN216389437U - Current collecting component, battery monomer, battery and electric equipment

Info

Publication number: CN216389437U
Application number: CN202123160953.9U
Authority: CN
Inventors: 苏华圣; 邢承友; 李全坤; 王鹏; 杨道伟; 金海族
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-26
Anticipated expiration: 2031-12-15

Abstract

The embodiment of the application provides a current collecting component, a single battery, a battery and electric equipment, and belongs to the technical field of batteries. The battery cell has two output poles with opposite polarities for outputting electric energy. The current collecting component comprises two current collectors, an insulator and a limiting structure. The two current collectors are oppositely arranged along the width direction of the current collecting component and are respectively connected with the two output electrodes. The insulator is used for connecting the two current collectors, and the insulator is at least partially located between the two current collectors along the width direction so as to isolate the two current collectors in an insulating mode. The limiting structure is used for limiting the current collector to be separated from the insulator along the width direction. Two mass flow bodies in the mass flow component pass through the insulator and connect, and two mass flow bodies are kept apart by the insulator insulation, breaks away from the insulator through limit structure restriction mass flow component along the width direction of mass flow component for two mass flow bodies are difficult for breaking away from the insulator, reduce two mass flow bodies overlap joint each other, and cause the risk of the inside short circuit of battery monomer, improve the free security of battery.

Description

Current collecting component, battery monomer, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a current collecting component, a battery monomer, a battery and electric equipment.

Background

With the development of new energy technology, batteries are more and more widely used, such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

In the single battery, both the performance of the single battery and the safety of the single battery need to be considered, and if the safety of the single battery is low, the single battery has potential safety hazards such as fire and explosion. Therefore, how to improve the safety of the battery cell is an urgent problem to be solved in the battery technology.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a current collecting component, a single battery, a battery and electric equipment, and can effectively improve the safety problem of the single battery.

In a first aspect, embodiments of the present application provide a current collecting member for a battery cell, the battery cell having two output poles with opposite polarities for outputting electric energy, the current collecting member including: the two current collectors are oppositely arranged along the width direction of the current collecting component and are used for respectively connecting the two output electrodes; the insulator is used for connecting the two current collectors, and is at least partially positioned between the two current collectors along the width direction so as to isolate the two current collectors in an insulating way; and the limiting structure is used for limiting the current collector to be separated from the insulator along the width direction.

Among the above-mentioned technical scheme, two mass flow bodies pass through the insulator and connect, and two mass flow bodies are kept apart by the insulator insulation, and the width direction who follows the mass flow component through limit structure restriction mass flow component breaks away from the insulator for two mass flow bodies are difficult for breaking away from the insulator, reduce two mass flow bodies overlap joint each other, and cause the risk of the inside short circuit of battery monomer, improve the free security of battery.

In some embodiments, the limiting structure comprises a limiting portion and a concave portion, one of the limiting portion and the concave portion is disposed on the current collector, and the other is disposed on the insulator; the limiting part is used for being in plug-in fit with the concave part so as to limit the current collector to be separated from the insulator along the width direction.

Among the above-mentioned technical scheme, through spacing portion and concave part grafting cooperation, restrict the mass flow body and break away from the insulator along the width direction of the mass flow component, simple structure easily the shaping manufacturing can effectively improve the fastness after mass flow body is connected with the insulator.

In some embodiments, the insulator is provided with a limiting groove, and one end of the current collector is clamped in the limiting groove along the width direction so as to limit the current collector to move relative to the insulator along the thickness direction of the current collecting member.

Among the above-mentioned technical scheme, the one end joint of the mass flow component is in the spacing inslot of insulator, and the spacing groove plays limiting displacement to the mass flow component to the relative insulator of thickness direction along the mass flow component of restriction mass flow removes, makes the mass flow component along the width direction and the thickness direction of mass flow component all be difficult for detaching the insulator.

In some embodiments, the stopper structure comprises: a recess disposed on the current collector; and the limiting part is arranged on the insulator, at least part of the limiting part is positioned in the limiting groove and is in plug-in fit with the concave part so as to limit the current collector to be separated from the insulator along the width direction.

Among the above-mentioned technical scheme, insert the concave part of locating the mass flow body through the spacing portion on the insulator to and the one end joint of the mass flow component is in the spacing inslot of insulator, makes the mass flow body along the width direction and the thickness direction of the mass flow component all be difficult for detaching the insulator.

In some embodiments, the recess is a first through hole penetrating through a surface of the current collector in the thickness direction.

Among the above-mentioned technical scheme, the concave part is through-hole structure, easily processing, and the concave part can provide more accommodation space for spacing portion, and spacing portion is difficult for taking place elastic deformation because of the mass flow body and breaks away from in the concave part, strengthens limit structure to the spacing ability of the mass flow body, further improves the fastness after the mass flow body is connected with the insulator.

In some embodiments, the limiting groove includes two groove sidewalls, the two groove sidewalls are disposed opposite to each other along the thickness direction, and two ends of the limiting portion are respectively fixed to the two groove sidewalls.

Among the above-mentioned technical scheme, the both ends of spacing portion are fixed in two groove side walls of spacing groove respectively, strengthen the joint strength of spacing portion and insulator, reduce because of spacing portion and insulator fracture, and cause the mass flow body to break away from the risk of spacing groove.

In some embodiments, the recess is recessed in a thickness direction of the current collecting member.

Among the above-mentioned technical scheme, the concave part is sunken along the thickness direction of collecting the current component for spacing portion also extends along the thickness direction of collecting the current component, and spacing portion cooperates with the concave part in order to restrict the mass flow body and break away from the insulator along the width direction of collecting the current component, and simple structure reduces the shaping degree of difficulty of concave part and spacing portion.

In some embodiments, a plurality of limiting structures arranged along the extending direction of the current collecting member are arranged between the current collector and the insulator.

Among the above-mentioned technical scheme, through set up a plurality of limit structure between mass flow body and insulator, can further improve the fastness after mass flow body is connected with the insulator for the mass flow body is more difficult for breaking away from the insulator.

In some embodiments, the current collecting member includes a plurality of the insulators arranged at intervals in an extending direction of the current collecting member; the current collector is configured to be bendable at a gap region between adjacent two of the insulators.

Among the above-mentioned technical scheme, a plurality of insulators are arranged along the extending direction interval of the mass flow component for the mass flow body is buckled more easily in the clearance region between two adjacent insulators, is convenient for buckle into beta structure with the mass flow component, with the space that reduces the mass flow component and occupy battery monomer inside.

In some embodiments, the insulator is an injection molded piece that is injection molded between the two current collectors.

Among the above-mentioned technical scheme, the insulator is the injection molding, and the shaping is simple, and the insulator after the shaping is in the same place with the mass flow body adhesion, can improve the fastness after mass flow body and insulator are connected.

In a second aspect, an embodiment of the present application provides a battery cell, including: an electrode assembly having two tabs with opposite polarities; the polarity of the two output electrodes is opposite, and the two output electrodes are used for outputting the electric energy of the single battery; and the current collecting member provided by any one of the embodiments of the first aspect, wherein one current collector is used for connecting one tab and one output electrode, and the other current collector is used for connecting the other tab and the other output electrode.

In some embodiments, the two tabs are formed at the same end of the electrode assembly.

Among the above-mentioned technical scheme, two utmost point ears are formed in electrode subassembly with one side, are convenient for and are connected with two mass flow collectors, realize homonymy play utmost point ear, reduce the space that utmost point ear occupy, are favorable to improving the free energy density of battery.

In some embodiments, the current collector has a weld region for welding with the tab, the weld region having an abutment surface for abutment with the tab, the insulator not extending beyond the abutment surface.

Among the above-mentioned technical scheme, the insulator does not surpass the mass flow body and utmost point ear welded and leans on the face, when avoiding the mass flow body and utmost point ear welding, insulator and utmost point ear interfere, and make and lean on the face and can't lean on the condition in utmost point ear to lean on.

In some embodiments, the electrode assembly has a central bore, and the insulator has a second through-hole disposed opposite the central bore.

In the technical scheme, the second through hole in the insulator is opposite to the central hole of the electrode assembly, so that the current collecting component can be accurately installed.

In a third aspect, an embodiment of the present application provides a battery, including: any one of the embodiments of the second aspect provides a battery cell; and the box body is used for accommodating the battery monomer.

In a fourth aspect, an embodiment of the present application provides an electric device, including the battery provided in any one of the embodiments of the third aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

fig. 2 is an exploded view of a battery provided in accordance with some embodiments of the present application;

fig. 3 is an exploded view of a battery cell provided in some embodiments of the present application;

fig. 4 is a schematic structural view of the current collecting member shown in fig. 3;

FIG. 5 is an exploded view of the current collecting member shown in FIG. 3;

fig. 6 is a schematic view of the connection of the current collecting member shown in fig. 3 to two output poles;

FIG. 7 is a schematic view of the connection of the current collector and the insulator shown in FIG. 4;

fig. 8 is an exploded view of the current collector and insulator shown in fig. 4;

fig. 9 is a schematic view of a current collector and an insulator according to further embodiments of the present disclosure;

fig. 10 is a schematic view of a current collector coupled to an insulator according to further embodiments of the present disclosure;

fig. 11 is a schematic view of a current collector coupled to an insulator according to still other embodiments of the present disclosure;

fig. 12 is a top view of the current collecting member shown in fig. 4;

fig. 13 is a schematic structural view of the current collector shown in fig. 12;

fig. 14 is a flow chart of a method of manufacturing a current collecting member provided by some embodiments of the present application;

fig. 15 is a schematic block diagram of a manufacturing apparatus of a current collecting member provided in some embodiments of the present application.

Icon: 10-a box body; 11-a first part; 12-a second part; 20-a battery cell; 21-a housing; 22-an electrode assembly; 221-pole ear; 23-end caps; 231-electrode terminals; 24-a current collecting member; 241-a current collector; 2411-welding zone; 2411 a-an abutting surface; 242-an insulator; 2421-a second via; 2422-a limit groove; 2422 a-slot side wall; 243-limit structure; 2431-a limiting part; 2432-a concave portion; 100-a battery; 200-a controller; 300-a motor; 1000-a vehicle; 2000-manufacturing equipment; 2100-a first providing device; 2200-a second providing means; 2300-assembling the device; x-width direction; y-direction of extension; z-thickness direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are also not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive pole piece, a negative pole piece and an isolating membrane. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece includes anodal mass flow body and anodal active substance layer, and anodal active substance layer coats in anodal mass flow body's surface, and the anodal mass flow body protrusion in the anodal mass flow body that has coated anodal active substance layer of uncoated anodal active substance layer, and the anodal mass flow body that does not coat anodal active substance layer is as anodal utmost point ear. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative pole mass flow body, and the negative pole mass flow body protrusion in the negative pole mass flow body of coating the negative pole active substance layer not coating the negative pole active substance layer, and the negative pole mass flow body of not coating the negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters, and also needs to consider the safety of the battery.

For a general battery cell, the battery cell has two output electrodes with opposite polarities, and the two output electrodes are electrically connected to a positive electrode tab and a negative electrode tab of an electrode assembly, respectively, to output electric energy of the battery cell. The two output poles are positioned at two opposite ends of the battery monomer, and in the two output poles, two output stages can be both electrode terminals; one output electrode may be an electrode terminal, and the other output electrode may be an end cap or a case.

In order to better realize the electrical connection between the output electrode and the tab, a current collecting member is generally disposed in the battery cell, and the output electrode and the tab are connected together through the current collecting member. Because the two output electrodes of the single battery are respectively positioned at the two ends of the single battery, the two current collecting components connected with the two output electrodes are respectively positioned at the two ends of the electrode assembly, and the two current collecting components occupy a larger space in the shell to influence the energy density of the single battery.

In order to improve the energy density of the single battery, the two output electrodes of the single battery can be arranged at the same end of the single battery, so that the two current collecting members are positioned at the same side of the electrode assembly, and thus, only a space for installing the current collecting members needs to be reserved at one side of the electrode assembly, and the energy density of the single battery can be improved. However, the inventors have found that, in such a battery cell, since the two current collecting members are located on the same side of the electrode assembly, the two current collecting members are easily overlapped together due to vibration or collision of the battery cell, resulting in internal short circuit of the battery cell, resulting in ignition, explosion, etc. of the battery cell, and the safety of the battery cell is poor.

In view of this, embodiments of the present application provide a current collecting member, in which a current collecting member is provided as an insulator and two current collectors, the insulator is provided between the two current collectors, and a limiting structure is provided between the insulator and the current collectors to limit the current collectors from being separated from the insulator in a width direction of the current collecting member.

In such collection flow component, two mass flow bodies pass through the insulator and connect, and two mass flow bodies are kept apart by the insulator insulation, breaks away from the insulator through limit structure restriction collection flow component along the width direction of collection flow component for two mass flow bodies are difficult for breaking away from the insulator, reduce two mass flow bodies 241 overlap joint each other, and cause the risk of the inside short circuit of battery monomer, improve the free security of battery.

The current collecting member described in the embodiments of the present application is applicable to a battery cell, a battery, and an electric device using the battery.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

For convenience of explanation, the following embodiments will be described by taking an electric device as an example of a vehicle.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure, a battery 100 is disposed inside the vehicle 1000, and the battery 100 may be disposed at a bottom portion, a head portion, or a tail portion of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000.

The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

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

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure, in which the battery 100 includes a case 10 and a battery cell 20, and the case 10 is used for accommodating the battery cell 20.

The case 10 is a component for accommodating the battery cell 20, the case 10 provides an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, and the first portion 11 and the second portion 12 cover each other to define a receiving space for receiving the battery cell 20. The first and second portions 11 and 12 may be in various shapes, such as rectangular parallelepiped, cylindrical, etc. The first portion 11 may be a hollow structure with one side open, the second portion 12 may also be a hollow structure with one side open, and the open side of the second portion 12 is covered on the open side of the first portion 11, thereby forming the box body 10 with a receiving space. The first portion 11 may have a hollow structure with one side opened, the second portion 12 may have a plate-like structure, and the second portion 12 may cover the opened side of the first portion 11 to form the case 10 having an accommodating space. The first part 11 and the second part 12 may be sealed by a sealing element, which may be a sealing ring, a sealant or the like.

In the battery 100, one or more battery cells 20 may be provided. If there are a plurality of battery cells 20, the plurality of battery cells 20 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to that the plurality of battery cells 20 are connected in series or in parallel. A plurality of battery cells 20 may be connected in series, in parallel, or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in series-parallel to form a whole, and may be accommodated in the case 10. Or all the battery cells 20 may be directly connected in series or in parallel or in series-parallel, and the whole of all the battery cells 20 is accommodated in the case 10.

In some embodiments, the battery 100 may further include a bus member, and the plurality of battery cells 20 may be electrically connected to each other through the bus member, so as to connect the plurality of battery cells 20 in series or in parallel or in series-parallel. The bus member may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, or the like.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 20 according to some embodiments of the present disclosure, in which the battery cell 20 includes a case 21, an electrode assembly 22, an end cap 23, and a current collecting member 24.

The case 21 is a member for accommodating the electrode assembly 22, and the case 21 may be a hollow structure having one end formed with an opening. The housing 21 may be in various shapes, such as a cylinder, a rectangular parallelepiped, or the like. The material of the housing 21 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc.

The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. The electrode assembly 22 has two tabs 221, the two tabs 221 having opposite polarities, i.e., one tab 221 is a positive electrode tab and the other tab 221 is a negative electrode tab, and the two tabs 221 may be formed at the same end of the electrode assembly 22.

The end cap 23 is a member that covers an opening of the case 21 to isolate the internal environment of the battery cell 20 from the external environment. The end cap 23 covers an opening of the case 21, the end cap 23 and the case 21 together define a sealed space for accommodating the electrode assembly 22, the electrolyte and other components, and the end cap 23 and the case 21 may be hermetically connected by a sealing member. The shape of the end cap 23 can be adapted to the shape of the housing 21, for example, the housing 21 has a rectangular parallelepiped structure, the end cap 23 has a rectangular plate structure adapted to the housing 21, and for example, the housing 21 has a cylindrical structure, and the end cap 23 has a circular plate structure adapted to the housing 21. The end cap 23 may be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.

The end cap 23 may be provided with an electrode terminal 231, and the electrode terminal 231 is used to be electrically connected to the electrode assembly 22 to output electric power of the battery cell 20. One or two electrode terminals 231 may be provided on the end cap 23. If there is one electrode terminal 231 on the end cap 23, the end cap 23 and the electrode terminal 231 are electrically connected to two tabs 221 of the electrode assembly 22, respectively, so that the end cap 23 and the electrode terminal 231 respectively serve as two output electrodes with opposite polarities of the battery cells 20. As shown in fig. 3, if there are two electrode terminals 231 on the end cap 23, the two electrode terminals 231 may be a positive electrode terminal and a negative electrode terminal, respectively, which are electrically connected to two tabs 221 of the electrode assembly 22, respectively, so that the positive electrode terminal and the negative electrode terminal are respectively two opposite output electrodes of the battery cell 20.

In the embodiment in which the plurality of battery cells 20 in the battery 100 are electrically connected by the bus bar member to realize the series connection, the parallel connection, or the series-parallel connection of the plurality of battery cells 20, the output electrode of the battery cell 20 is used to be connected with the bus bar member. For example, two battery cells 20 are connected in series, and the positive electrode terminal and the negative electrode terminal on the end cap 23 are respectively two output terminals of the battery cells 20, the positive electrode terminal of one battery cell 20 is connected to the negative electrode terminal of the other battery cell 20 through a bus member.

The current collecting member 24 is a part connecting the electrode assembly 22 and both output poles of the battery cell 20. In the embodiment in which the end cap 23 and the electrode terminal 231 are both output electrodes of the battery cell 20, one tab 221 of the electrode assembly 22 and the end cap 23 and the other tab 221 of the electrode assembly 22 and the electrode terminal 231 are connected by the same current collecting member 24. In the embodiment in which the positive electrode terminal and the negative electrode terminal are both output electrodes of the battery cell 20, one tab 221 of the electrode assembly 22 and the positive electrode terminal and the other tab 221 and the negative electrode terminal are connected by the current collecting member 24.

The specific structure of the current collecting member 24 will be described in detail below with reference to the accompanying drawings.

Referring to fig. 4-6, fig. 4 is a schematic structural diagram of the current collecting member 24 shown in fig. 3, fig. 5 is an exploded view of the current collecting member 24 shown in fig. 3, and fig. 6 is a schematic connection diagram of the current collecting member 24 shown in fig. 3 and two output poles, in an embodiment of the present invention, a current collecting member 24 is provided for a battery cell 20, and the battery cell 20 has two output poles with opposite polarities for outputting electric energy. The current collecting member 24 includes an insulator 242, a limiting structure 243, and two current collectors 241. The two current collectors 241 are oppositely arranged in the width direction X of the current collecting member 24 to connect the two output poles, respectively. The insulator 242 is used to connect the two current collectors 241, and the insulator 242 is at least partially located between the two current collectors 241 in the width direction X to insulate and isolate the two current collectors 241. The limiting structure 243 is used for limiting the current collector 241 from separating from the insulator 242 along the width direction X.

The current collector 241 is a conductive portion of the current collecting member 24, and the current collector 241 may be a sheet metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, or the like.

The two current collectors 241 are respectively connected to two output electrodes, and the current collectors 241 may be welded to the output electrodes. The two current collectors 241 are also respectively connected to two tabs 221 of the electrode assembly 22, and the current collectors 241 may be welded to the tabs 221. In an embodiment where the end cap 23 and the electrode terminal 231 serve as both output electrodes of the battery cell 20, one current collector 241 of the current collecting member 24 connects the end cap 23 and one tab 221 of the electrode assembly 22, and the other current collector 241 of the current collecting member 24 connects the electrode terminal 231 and the other tab 221 of the electrode assembly 22. As shown in fig. 6, in an embodiment in which two electrode terminals 231 are used as two output electrodes of the battery cell 20, one current collector 241 of the current collecting member 24 connects one electrode terminal 231 and one tab 221 of the electrode assembly 22, and the other current collector 241 of the current collecting member 24 connects the other electrode terminal 231 and the other tab 221 of the electrode assembly 22.

For example, with continued reference to fig. 4 and 5, the current collector 241 has a welding zone 2411 for welding with the tab 221, the welding zone 2411 has an abutting surface 2411a for abutting with the tab 221, and the insulator 242 does not extend beyond the abutting surface 2411 a. In order to avoid the situation that the abutting surface 2411a cannot abut against the tab 221 due to interference between the insulator 242 and the tab 221 when the current collector 241 is welded to the tab 221.

The current collector 241 is formed with a projection at the land 2411, the surface of the projection forming the abutting surface 2411 a. The projection may be a V-shaped structure.

The insulator 242 is an insulating portion in the current collecting member 24, and the insulator 242 performs an insulating function between the two current collectors 241, so that the two current collectors 241 have a distance in the width direction X of the current collecting member 24 to insulate and separate the two current collectors 241. The insulator 242 is made of an insulating material, such as plastic or rubber.

Illustratively, a second through-hole 2421 is provided on the insulator 242, and the second through-hole 2421 is configured to be disposed opposite to the central hole of the electrode assembly 22.

The limiting structure 243 limits the current collector 241 from separating from the insulator 242 along the width direction X, and the limiting structure 243 may be in various structural forms as long as the current collector 241 can be limited from separating from the insulator 242 along the width direction X. One or more limiting structures 243 between the current collector 241 and the insulator 242 may be provided.

After the current collecting members 24 are mounted in the battery cells 20, the current collecting members 24 may have a spread flat structure, for example, the current collecting members 24 have a substantially flat plate shape, and if the current collecting members 24 have a circular disk-shaped structure, the radial direction of the current collecting members 24 may be understood as the width direction X of the current collecting members 24; the current collecting member 24 may also be a folded structure, for example, the current collecting member 24 may be an elongated structure after being unfolded, and the current collecting member 24 may be folded into multiple layers, and the width direction X of the current collecting member 24 is perpendicular to the length direction of the unfolded current collecting member 24.

In the embodiment of the application, the two current collectors 241 are connected through the insulator 242, the two current collectors 241 are insulated and isolated by the insulator 242, and the current collecting member 24 is limited by the limiting structure 243 to be separated from the insulator 242 along the width direction X of the current collecting member 24, so that the two current collectors 241 are not easily separated from the insulator 242, the risk of internal short circuit of the battery cell 20 due to overlapping of the two current collectors 241 is reduced, and the safety of the battery cell 20 is improved.

In addition, because the two current collectors 241 are connected through the insulator 242, under the limiting effect of the limiting structure 243, the two current collectors 241 are not easily separated from the insulator 242, so that the whole current collecting member 24 has good integrity and is convenient to mount, the current collectors 241 and the insulator 242 are not easily separated in the mounting process, and the assembly efficiency of the battery cell 20 is improved.

In some embodiments, referring to fig. 7 and 8, fig. 7 is a schematic connection diagram of the current collector 241 and the insulator 242 shown in fig. 4, fig. 8 is an exploded view of the current collector 241 and the insulator 242 shown in fig. 4, the limiting structure 243 includes a limiting portion 2431 and a concave portion 2432, one of the limiting portion 2431 and the concave portion 2432 is disposed on the current collector 241, and the other is disposed on the insulator 242. The limiting portion 2431 is used for being in plug-in fit with the concave portion 2432 to limit the current collector 241 from being separated from the insulator 242 along the width direction X.

Taking the example where the limiting portion 2431 is provided on the insulator 242 and the concave portion 2432 is provided on the current collector 241, the concave portion 2432 may be a hole portion provided on the current collector 241, and the concave portion 2432 may be a blind hole provided on the current collector 241 or a first through hole penetrating through the surface of the current collector 241 in the thickness direction Z. The recess 2432 may be a circular, square hole, or the like. It can be understood that if the recessed portion 2432 is a circular hole, the limiting portion 2431 is a cylindrical structure matching with the recessed portion 2432, and if the recessed portion 2432 is a square hole, the limiting portion 2431 is a quadrangular structure matching with the recessed portion 2432.

In this embodiment, the limiting portion 2431 and the concave portion 2432 are inserted and matched to limit the current collector 241 from separating from the insulator 242 along the width direction X of the current collecting member 24, so that the structure is simple, the forming and manufacturing are easy, and the firmness after the connection between the current collector 241 and the insulator 242 can be effectively improved.

In some embodiments, with continued reference to fig. 7 and 8, the insulator 242 is provided with a limiting groove 2422, and one end of the current collector 241 is clamped in the limiting groove 2422 along the width direction X to limit the current collector 241 from moving relative to the insulator 242 along the thickness direction Z of the current collecting member 24.

It can be understood that both ends of the insulating member in the width direction X are provided with the limiting grooves 2422, and one current collector 241 is correspondingly clamped in the limiting grooves 2422. The notch of the stopper groove 2422 is located on the end surface of the current collector 241 in the width direction X.

In the present embodiment, one end of the current collecting member 24 is clamped in the limiting groove 2422 of the insulator 242, and the limiting groove 2422 limits the current collecting member 24 to limit the current collector 241 from moving relative to the insulator 242 along the thickness direction Z of the current collecting member 24, so that the current collector 241 is not easily separated from the insulator 242 along the width direction X and the thickness direction Z of the current collecting member 24. In addition, because the end of the current collecting member 24 is clamped in the limiting groove 2422 of the insulator 242, the thickness of the portion of the current collecting member 24 located in the limiting groove 2422 is smaller than the thickness of the insulator 242, so that the insulator 242 has a better insulating effect between the two current collectors 241.

In some embodiments, the limit structure 243 includes a recessed portion 2432 and a limit portion 2431. The recess 2432 is provided in the current collector 241. The limiting portion 2431 is disposed on the insulator 242, and at least a portion of the limiting portion 2431 is located in the limiting groove 2422 and is in inserting engagement with the concave portion 2432 to limit the current collector 241 from separating from the insulator 242 along the width direction X.

The limit portion 2431 and the insulator 242 may be an integrally formed structure. The concave portion 2432 may be a hole provided in the current collector 241, and the concave portion 2432 may be a blind hole provided in the current collector 241 or a through hole penetrating through the surface of the current collector 241 in the thickness direction Z.

The limiting part 2431 on the insulator 242 is inserted into the concave part 2432 of the current collector 241, and one end of the current collecting member 24 is clamped in the limiting groove 2422 of the insulator 242, so that the current collector 241 is not easy to separate from the insulator 242 along the width direction X and the thickness direction Z of the current collecting member 24.

In some embodiments, with continued reference to fig. 7 and 8, the recess 2432 is a first through hole that penetrates through the surface of the current collector 241 in the thickness direction Z.

The recess 2432 is a through-hole structure, and the recess 2432 penetrates through two surfaces of the current collector 241 opposite to each other in the thickness direction Z.

Illustratively, the first through-hole on the current collector 241 is a circular hole.

In this embodiment, the concave portion 2432 is a through-hole structure, and is easy to process, and the concave portion 2432 can provide more accommodating spaces for the limiting portion 2431, and the limiting portion 2431 is not easy to be separated from the concave portion 2432 due to elastic deformation of the current collector 241, so that the limiting capability of the limiting structure 243 on the current collector 241 is enhanced, and the firmness of the current collector 241 after being connected with the insulator 242 is further improved.

In some embodiments, the limiting groove 2422 includes two groove sidewalls 2422a, the two groove sidewalls 2422a are disposed opposite to each other along the thickness direction Z, and both ends of the limiting part 2431 are respectively fixed to the two groove sidewalls 2422 a.

The groove side wall 2422a is a groove wall in which the stopper groove 2422 is arranged in the thickness direction Z of the current collecting member 24, and the groove side wall 2422a may be a flat surface.

In the embodiment, two ends of the limiting portion 2431 are respectively fixed to the two groove sidewalls 2422a of the limiting groove 2422, so that the connection strength between the limiting portion 2431 and the insulator 242 is enhanced, and the risk that the current collector 241 is separated from the limiting groove 2422 due to the fracture of the limiting portion 2431 and the insulator 242 is reduced.

In another embodiment, referring to fig. 9, fig. 9 is a schematic connection diagram of the current collector 241 and the insulator 242 according to another embodiment of the present disclosure, where one end of the limiting portion 2431 is fixed to one slot sidewall 2422a of the limiting slot 2422, and the other end of the limiting portion 2431 is spaced from the other slot sidewall 2422a of the limiting slot 2422. The limiting portion 2431 has elastic deformation capability, and when the current collector 241 is clamped into the limiting groove 2422, the limiting portion 2431 is elastically deformed, and after the limiting portion 2431 is aligned with the concave portion 2432, the limiting portion 2431 is restored to be deformed and clamped into the concave portion 2432.

In other embodiments, the current collector 241 and the insulator 242 may have other arrangements, for example, referring to fig. 10, fig. 10 is a schematic connection diagram of the current collector 241 and the insulator 242 according to still other embodiments of the present application, the current collector 241 and the insulator 242 may be stacked, the limiting portion 2431 is a convex portion protruding from the surface of the insulator, and the convex portion is matched with the concave portion 2432.

In some embodiments, referring to fig. 7-10, the recess 2432 is recessed along the thickness direction Z of the current collecting member 24. That is, the depth direction of the recessed portion 2432 coincides with the thickness direction Z of the current collecting member 24.

Taking the concave portion 2432 as an example of a first through hole provided on the current collecting member 24, the axial direction of the first through hole is the thickness direction Z of the current collecting member 24.

The concave portion 2432 is concave in the thickness direction Z of the current collecting member 24, so that the limiting portion 2431 also extends in the thickness direction Z of the current collecting member 24, the limiting portion 2431 and the concave portion 2432 are matched to limit the current collector 241 to be separated from the insulator 242 in the width direction X of the current collecting member 24, the structure is simple, and the forming difficulty of the concave portion 2432 and the limiting portion 2431 is reduced.

In other embodiments, referring to fig. 11, fig. 11 is a schematic connection diagram of a current collector 241 and an insulator 242 according to still other embodiments of the present disclosure, and the concave portion 2432 may also extend along the width direction X of the current collecting member 24.

Illustratively, the concave portion 2432 is a tapered groove provided at one end of the insulator 242 in the width direction X of the current collecting member 24, and the limiting portion 2431 is a tapered body provided at one end of the current collector 241 in the width direction X of the current collecting member 24, and the tapered body is engaged with the tapered groove to limit the current collector 241 from being detached from the insulator 242 in the width direction X of the current collecting member 24.

In some embodiments, referring to fig. 12, fig. 12 is a top view of the current collecting member 24 shown in fig. 4, and a plurality of limiting structures 243 arranged along the extending direction Y of the current collecting member 24 are disposed between the current collector 241 and the insulator 242.

After the current collecting members 24 are unfolded, the longitudinal direction of the current collecting members 24 is the extending direction Y of the current collecting members 24.

Referring to fig. 13, fig. 13 is a schematic structural view of the current collector 241 shown in fig. 12, taking the concave portion 2432 in the limiting structure 243 as an example of a first through hole disposed on the current collector 241, since there are a plurality of limiting structures 243 and a plurality of first through holes on the current collector 241, the plurality of first through holes are arranged at intervals along the extending direction Y of the current collecting member 24.

In this embodiment, by providing the plurality of limiting structures 243 between the current collector 241 and the insulator 242, the firmness of the connection between the current collector 241 and the insulator 242 can be further improved, so that the current collector 241 is less likely to be separated from the insulator 242.

In some embodiments, with continued reference to fig. 12, the current collecting member 24 includes a plurality of insulators 242, and the plurality of insulators 242 are spaced apart along the extending direction Y of the current collecting member 24. The current collector 241 is configured to be bendable in a gap region between two adjacent insulators 242.

The plurality of insulators 242 are arranged at intervals in the extending direction Y of the current collecting member 24, that is, a gap exists between every adjacent two insulators 242 in the extending direction Y of the current collecting member 24.

In the embodiment in which the second through holes 2421 are provided on the insulator 242, the second through holes 2421 may be provided for one insulator 242, for example, the second through holes 2421 may be provided for one insulator 242 closest to the electrode assembly 22 after the current collecting member 24 is bent; it is also possible that a plurality of insulators 242 are provided with second through holes 2421, and after the current collecting member 24 is bent, the second through holes 2421 of each adjacent two insulators 242 are oppositely disposed.

In the present embodiment, the plurality of insulators 242 are arranged at intervals along the extending direction Y of the current collecting member 24, so that the current collectors 241 are more easily bent in the gap regions between two adjacent insulators 242, and the current collecting member 24 is conveniently bent into a folded structure, so as to reduce the space occupied by the current collecting member 24 inside the battery cell 20.

In other embodiments, there may be one insulator 242 in the current collecting member 24, and the insulator 242 is continuously arranged between two current collectors 241 along the extending direction Y of the current collecting member 24.

In some embodiments, the insulator 242 is an injection molded piece that is injection molded between the two current collectors 241.

In the embodiment where the limiting structure 243 includes the limiting portion 2431 and the concave portion 2432, taking the example where the concave portion 2432 is disposed on the current collector 241, after the insulator 242 is injection molded, the limiting portion 2431 accommodated in the concave portion 2432 is naturally formed on the insulator 242.

The insulator 242 is an injection molded part, so that the molding is simple, the molded insulator 242 and the current collector 241 are adhered together, and the firmness of the connection between the current collector 241 and the insulator 242 can be improved.

The embodiment of the present application provides a battery cell 20, which includes an electrode assembly 22, two output electrodes, and a current collecting member 24 provided in any one of the above embodiments. The electrode assembly 22 has two tabs 221, and the polarities of the two tabs 221 are opposite. The two output poles have opposite polarities and are used for outputting the electric energy of the battery cell 20. One current collector 241 is used to connect one tab 221 to one output electrode, and the other current collector 241 is used to connect the other tab 221 to the other output electrode.

In some embodiments, two tabs 221 are formed at the same end of the electrode assembly 22.

Taking two output electrodes as two electrode terminals 231 disposed on the end cap 23 as an example, two tabs 221 are formed at one end of the electrode assembly 22 facing the end cap 23.

The two tabs 221 located at the same end of the electrode assembly 22 can be connected with the two current collectors 241 of the current collecting member 24, so that the tabs 221 are led out from the same side, the space occupied by the tabs 221 is reduced, and the energy density of the battery cell 20 is improved.

In some embodiments, the current collector 241 has a weld zone 2411 for welding with the tab 221, the weld zone 2411 has an abutting surface 2411a for abutting with the tab 221, and the insulator 242 does not extend beyond the abutting surface 2411 a.

Exemplarily, the current collector 241 is formed with a protrusion at the welding area 2411, and a surface of the protrusion forms the abutting surface 2411 a. The protruding portion may be a V-shaped structure to increase the welding range of the current collector 241 and the tab 221.

Since the insulator 242 does not exceed the abutting surface 2411a where the current collector 241 and the tab 221 are welded, the situation that the abutting surface 2411a cannot abut against the tab 221 due to interference between the insulator 242 and the tab 221 when the current collector 241 and the tab 221 are welded is avoided.

In some embodiments, the electrode assembly 22 has a central bore, and the insulator 242 has a second through-hole 2421 disposed opposite the central bore 2421.

Taking electrode assembly 22 as a wound structure as an example, a center hole is formed at the winding center position of electrode assembly 22.

In the present embodiment, the second through-hole 2421 of the insulator 242 is disposed opposite to the central hole of the electrode assembly 22, enabling accurate mounting of the current collecting member 24. During the installation process, after the second through hole 2421 is aligned with the central hole, the current collector 241 may be connected to the tab 221, for example, by welding. In addition, the second through hole 2421 on the insulator 242 may also serve as a pressure relief channel when the battery cell 20 is thermally runaway, so that the battery cell 20 is not easily obstructed by the current collecting member 24 when discharging the exhaust outward.

The embodiment of the application provides a battery 100, which comprises a box body 10 and a battery cell 20 provided by any one of the above embodiments, wherein the box body 10 is used for accommodating the battery cell 20.

The embodiment of the present application provides an electric device, including the battery 100 provided in any one of the above embodiments.

Referring to fig. 3 and 4, an embodiment of the present application provides a cylindrical battery including a case 21, an electrode assembly 22, an end cap 23, a positive electrode terminal, a negative electrode terminal, and a current collecting member 24. The electrode assembly 22 is received in the case 21, and one end of the electrode assembly 22 forms a positive electrode tab and a negative electrode tab. The end cap 23 covers an opening at one end of the housing 21. The positive electrode terminal and the negative electrode terminal are both arranged on the end cover 23 and respectively form two output poles with opposite polarities of the cylindrical battery. The current collecting member 24 is located in the case 21 on a side of the electrode assembly 22 facing the end cap 23, and the positive electrode tab and the positive electrode terminal and the negative electrode tab and the negative electrode terminal are connected by the same current collecting member 24.

The current collecting member 24 includes an insulator 242, a limiting structure 243, and two current collectors 241. The current collectors 241 are oppositely arranged in the width direction X of the current collecting member 24, one current collector 241 being for connecting a positive electrode tab and a positive electrode terminal, and the other current collector 241 being for connecting a negative electrode tab and a negative electrode terminal. The insulator 242 is used to connect the two current collectors 241, and the insulator 242 is at least partially located between the two current collectors 241 in the width direction X to insulate and isolate the two current collectors 241. The limiting structure 243 is used for limiting the current collector 241 from separating from the insulator 242 along the width direction X.

In such a cylindrical battery, the current collecting member 24 is used to realize the same-side tab 221, and a space for installing the current collecting member 24 is reserved on only one side of the electrode assembly 22 in the case 21, so that the case 21 can provide more space for the electrode assembly 22, which is beneficial to improving the energy density of the battery cell 20. In the current collecting member 24, the two current collectors 241 are connected through the insulator 242, the two current collectors 241 are insulated and isolated by the insulator 242, and the current collecting member 24 is limited by the limiting structure 243 to be separated from the insulator 242 along the width direction X of the current collecting member 24, so that the two current collectors 241 are not easily separated from the insulator 242, the risk of internal short circuit of the battery cell 20 due to overlapping of the two current collectors 241 is reduced, and the safety of the battery cell 20 is improved.

Referring to fig. 14, fig. 14 is a flowchart illustrating a method for manufacturing a current collecting member 24 according to some embodiments of the present disclosure, where the present disclosure provides a method for manufacturing a current collecting member 24, including:

s100: providing two current collectors 241;

s200: providing an insulator 242;

s300: the insulator 242 is attached to the two current collectors 241 such that the two current collectors 241 are oppositely arranged in the width direction X of the current collecting member 24, and the insulator 242 is located at least partially between the two current collectors 241 in the width direction X to insulate and isolate the two current collectors 241.

A limiting structure 243 is formed between the insulator 242 and the current collector 241, and the limiting structure 243 is used for limiting the current collector 241 to be separated from the insulator 242 along the width direction X.

In the above method, step S100 and step S200 are not limited. Step S200 may be executed first, and then step S100 may be executed; step S100 may be performed first, and then step S200 may be performed.

In some embodiments, step S300 includes: the insulator 242 is injection molded between the two current collectors 241, and the limiting structure 243 is formed during the molding process of the insulator 242.

Taking the current collector 241 with the concave portion 2432 as an example, after the insulator 242 is injection molded between two current collectors 241, the limiting portion 2431 accommodated in the concave portion 2432 is naturally formed on the insulator 242, so that the limiting structure 243 in which the limiting portion 2431 is engaged with the concave portion 2432 is formed.

It should be noted that, regarding the structure of the current collecting member 24 manufactured by the manufacturing method provided in each of the above embodiments, reference may be made to the current collecting member 24 provided in each of the above embodiments, and details are not described herein again.

Referring to fig. 15, fig. 15 is a schematic block diagram of a manufacturing apparatus 2000 for a current collecting member 24 according to some embodiments of the present disclosure, and the present disclosure further provides a manufacturing apparatus 2000 for a current collecting member 24, where the manufacturing apparatus 2000 includes a first providing device 2100, a second providing device 2200, and an assembling device 2300.

The first providing apparatus is for providing two current collectors 241. The second supply device is used to supply the insulator 242. An assembling device 2300 for connecting the insulator 242 to the two current collectors 241 such that the two current collectors 241 are oppositely arranged along the width direction X of the current collecting member 24 and the insulator 242 is at least partially located between the two current collectors 241 in the width direction X to insulate and isolate the two current collectors 241.

It should be noted that, regarding the structure of the current collecting member 24 manufactured by the manufacturing apparatus 2000 provided in the above embodiments, reference may be made to the current collecting member 24 provided in each of the foregoing embodiments, and details are not described herein again.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The above embodiments are merely for illustrating the technical solutions of the present application and are not intended to limit the present application, and those skilled in the art can make various modifications and variations of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A current collecting member for a battery cell having two output poles of opposite polarities for outputting electric energy, the current collecting member comprising:

the two current collectors are oppositely arranged along the width direction of the current collecting component and are used for respectively connecting the two output electrodes;

the insulator is used for connecting the two current collectors, and is at least partially positioned between the two current collectors along the width direction so as to isolate the two current collectors in an insulating way;

and the limiting structure is used for limiting the current collector to be separated from the insulator along the width direction.

2. The current collecting member according to claim 1, wherein the stopper structure includes a stopper portion and a recessed portion, one of which is provided to the current collector and the other of which is provided to the insulator;

the limiting part is used for being in plug-in fit with the concave part so as to limit the current collector to be separated from the insulator along the width direction.

3. The current collecting member according to claim 1, wherein the insulator is provided with a limiting groove, and one end of the current collector is clamped in the limiting groove along the width direction so as to limit the current collector to move relative to the insulator along the thickness direction of the current collecting member.

4. The current collecting member of claim 3, wherein the retaining structure comprises:

a recess disposed on the current collector;

and the limiting part is arranged on the insulator, at least part of the limiting part is positioned in the limiting groove and is in plug-in fit with the concave part so as to limit the current collector to be separated from the insulator along the width direction.

5. The current collecting member according to claim 4, wherein the recess is a first through hole that penetrates through a surface of the current collector in the thickness direction.

6. The current collecting member according to claim 5, wherein the stopper groove includes two groove side walls, the two groove side walls are disposed opposite to each other in the thickness direction, and both ends of the stopper portion are fixed to the two groove side walls, respectively.

7. The current collecting member according to claim 4, wherein the recess is recessed in a thickness direction of the current collecting member.

8. The current collecting member according to any one of claims 1 to 7, wherein a plurality of stopper structures are provided between the current collector and the insulator, the stopper structures being arranged along an extending direction of the current collecting member.

9. The current collecting member according to any one of claims 1 to 7, wherein the current collecting member includes a plurality of the insulators arranged at intervals in an extending direction of the current collecting member;

the current collector is configured to be bendable at a gap region between adjacent two of the insulators.

10. The current collecting member of any one of claims 1 to 7, wherein the insulator is an injection molded part injection molded between the two current collectors.

11. A battery cell, comprising:

an electrode assembly having two tabs with opposite polarities;

the polarities of the two output electrodes are opposite, and the two output electrodes are used for outputting the electric energy of the battery cells; and

the current collecting member as claimed in any one of claims 1 to 10, one current collector for connecting one tab to one output electrode and the other current collector for connecting the other tab to the other output electrode.

12. The battery cell as recited in claim 11, wherein the two tabs are formed at the same end of the electrode assembly.

13. The battery cell as recited in claim 11, wherein the current collector has a weld region for welding with the tab, the weld region having an abutment surface for abutment with the tab, the insulator not extending beyond the abutment surface.

14. The battery cell according to any one of claims 11-13, wherein the electrode assembly has a central aperture, and the insulator has a second through-hole disposed therein, the second through-hole being disposed opposite the central aperture.

15. A battery, comprising:

a battery cell according to any one of claims 11-14;

and the box body is used for accommodating the battery monomer.

16. An electrical device comprising the battery of claim 15.