CN220456515U - Battery monomer, battery and power consumption device - Google Patents

Abstract

The application provides a battery monomer, battery and power consumption device, this battery monomer include shell, electrode subassembly, electrode terminal, switching component and heat conduction piece, and electrode subassembly holds in the shell, and electrode terminal sets up in the wall of shell, and the switching component is used for electrode subassembly's utmost point ear and electrode terminal of electricity connection, and the heat conduction piece is connected between wall and switching component. In the above structure, since the heat conducting piece is connected between the wall part and the switching member, heat generated on the switching member of the battery cell can be quickly transferred to the wall part of the shell through the heat conducting piece, and then can be quickly diffused outwards, so that the battery cell has stronger heat dissipation capability.

Description

Battery monomer, battery and power consumption device

Technical Field

The present disclosure relates to battery technology, and in particular, to a battery cell, a battery, and an electric device.

Background

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

When the battery works, heat is generated, so that the temperature of the battery is increased, and the normal work of the battery is influenced. How to improve the heat dissipation capacity of the battery cells has been a focus of attention of those skilled in the art.

Disclosure of Invention

In view of the above, the present application provides a battery cell, a battery and an electric device of a battery, where the battery cell has a strong heat dissipation capability.

In a first aspect, embodiments of the present application provide a battery cell including a housing including a wall portion, an electrode assembly housed in the housing, an electrode terminal disposed in the wall portion, a transfer member for electrically connecting the electrode tab and the electrode terminal, and a heat conductive member connected between the wall portion and the transfer member.

In the above structure, since the heat conducting piece is connected between the wall part and the switching member, heat generated on the switching member of the battery cell can be quickly transferred to the wall part of the shell through the heat conducting piece, and then can be quickly diffused outwards, so that the battery cell has stronger heat dissipation capability.

According to some embodiments of the present application, a battery cell is provided, wherein a housing includes a case forming a cavity having an opening, and an end cap covering the opening, and an electrode assembly is disposed in the cavity; the end cap is a wall.

According to some embodiments of the present application, the wall portion includes a first side and a second side disposed opposite to each other, the first side facing the electrode assembly, the second side facing away from the electrode assembly, and the first side being provided with an insulating member. By providing the insulating member on the first side surface so that the wall portion has insulating properties, the electrode assembly and the electrode terminal can be insulated from each other.

According to the battery cell provided by some embodiments of the present application, the heat conducting member is an insulating structure. By configuring the heat conducting member as an insulating structure, the possibility of creating a passage between the switching member and the wall portion is advantageously reduced, and the possibility of occurrence of electric leakage of the battery cell is advantageously reduced.

According to the battery cell provided by some embodiments of the application, the insulating part is provided with the locating hole, the locating hole penetrates through the insulating part along the thickness direction of the insulating part, and the heat conducting piece is arranged in the locating hole and connected with the wall part and the switching component, so that the heat conducting piece arranged in the locating hole can be in contact connection with the wall part and the switching component, and the heat generated by the switching component can be quickly transferred to the first side surface of the wall part, so that the heat can be quickly transferred to the second side surface, and then the heat can be quickly diffused into the air outside.

According to the battery cell provided by some embodiments of the application, the dimension L1 of the heat conducting piece is larger than the dimension L2 of the insulating part along the thickness direction of the insulating part, so that a gap exists between the switching component and the insulating part, and heat dissipation of the switching component can be quickened.

According to the battery cell provided by some embodiments of the application, the heat conducting piece is in interference fit with the positioning hole, so that the possibility of gaps between the heat conducting piece and the inner wall of the positioning hole can be reduced, and the possibility of forming a passage between the electrode assembly in the containing cavity and the wall part is reduced.

According to the battery cell provided by some embodiments of the application, the heat conducting pieces are arranged in a plurality, and the switching component is connected with the wall part through the plurality of heat conducting pieces, so that the switching component can quickly transfer heat to the wall part through the plurality of heat conducting pieces, and the heat dissipation capacity of the switching component is improved.

According to the battery cell provided by some embodiments of the present application, the heat conductive member includes at least one of a heat conductive pad, a heat conductive adhesive, and a heat conductive grease.

According to the battery cell provided by some embodiments of the application, the switching member is provided with the protrusion, the wall portion is provided with the through hole, the through hole penetrates through the wall portion along the thickness direction of the wall portion, at least part of the protrusion is inserted into the through hole, and the electrode terminal covers the through hole and is connected to the protrusion, so that the switching member can be positioned on the wall portion, and the electrode terminal can be connected with the protrusion through the through hole, thereby being convenient for externally conveying electric energy.

In a second aspect, embodiments of the present application further provide a battery, where the battery includes a plurality of battery cells provided in any of the foregoing technical solutions.

In a third aspect, an embodiment of the present application further provides an electrical device, where the electrical device includes a battery or a battery unit provided in any one of the above technical solutions, and the battery is used for providing electrical energy.

The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects:

the application provides a battery monomer, this battery monomer include shell, electrode subassembly, electrode terminal, switching component and heat conduction spare, and electrode subassembly holds in the shell, and electrode terminal sets up in the wall portion of shell, and switching component is used for electrode subassembly's utmost point ear and electrode terminal of electricity connection, and the heat conduction spare is connected between wall portion and switching component. In the above structure, since the heat conducting piece is connected between the wall part and the switching member, heat generated on the switching member of the battery cell can be quickly transferred to the wall part of the shell through the heat conducting piece, and then can be quickly diffused outwards, so that the battery cell has stronger heat dissipation capability.

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

Drawings

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

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

fig. 2 is a schematic diagram of a split structure of a battery according to some embodiments of the present application;

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

fig. 4 is a schematic view of a part of a structure of a battery cell according to some embodiments of the present application;

FIG. 5 is a top view of a portion of a structure of a battery cell according to some embodiments of the present application;

FIG. 6 is a cross-sectional view at A in FIG. 5;

fig. 7 is an enlarged view at B in fig. 6.

Reference numerals in the specific embodiments are as follows:

1. a housing; 11. a wall portion; 111. a first side; 1111. an insulating member; 1112. positioning holes; 112. a second side; 112. a through hole; 12. a housing; 13. an end cap; 14. a cavity; 2. an electrode assembly; 21. a tab; 3. an electrode terminal; 4. a switching member; 41. a protrusion; 5. a heat conductive member; 10. a case; 101. a first case; 102. a second case; 20. a battery cell; 1000. a vehicle; 100. a battery; 200. a controller; 300. a motor.

Detailed Description

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

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

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

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

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

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

In this embodiment of the present application, the battery cell may be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material by charging after discharging the battery cell and continue to use.

The battery cell may be a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, or the like, which is not limited in the embodiment of the present application.

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

In some embodiments, the electrode assembly is a rolled structure. The positive plate and the negative plate are wound into a winding structure.

In some embodiments, the electrode assembly is a lamination stack.

As an example, a plurality of positive electrode sheets and negative electrode sheets may be provided, respectively, and a plurality of positive electrode sheets and a plurality of negative electrode sheets may be alternately stacked.

As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheets are folded to form a plurality of folded sections arranged in a stacked manner, with one positive electrode sheet sandwiched between adjacent folded sections.

As an example, the positive and negative electrode sheets are each folded to form a plurality of folded sections in a stacked arrangement.

As an example, the separator may be provided in plurality, respectively between any adjacent positive electrode sheet or negative electrode sheet.

As an example, the separator may be continuously provided, being disposed between any adjacent positive or negative electrode sheets by folding or winding.

In some embodiments, the electrode assembly may have a cylindrical shape, a flat shape, a polygonal column shape, or the like.

In some embodiments, the electrode assembly is provided with tabs that can conduct current away from the electrode assembly. The tab includes a positive tab and a negative tab.

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

As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, including a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, etc., without particular limitation in the present 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.

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

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

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

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

Because the battery monomer can produce heat when the work, make self temperature rise, battery monomer temperature is too high can not only lead to electrolyte to decompose and bring danger, still can influence battery monomer's overflow ability, reduces battery's performance. How to improve the heat dissipation capacity of the battery cells has been a focus of attention of those skilled in the art.

In order to improve the heat dissipation capacity of a battery cell, embodiments of the present application provide a battery cell, which includes a housing, an electrode assembly, an electrode terminal, a switching member, and a heat conducting element, wherein the electrode assembly is accommodated in the housing, the electrode terminal is disposed on a wall portion of the housing, the switching member is used for electrically connecting a tab and the electrode terminal of the electrode assembly, and the heat conducting element is connected between the wall portion and the switching member. In the above structure, since the heat conducting piece is connected between the wall part and the switching member, heat generated on the switching member of the battery cell can be quickly transferred to the wall part of the shell through the heat conducting piece, and then can be quickly diffused outwards, so that the battery cell has stronger heat dissipation capability.

The battery cell described in the embodiments of the present application is suitable for a battery and an electric device using the battery. The battery cell can be used in, but not limited to, electric devices such as vehicles, ships or aircrafts. The power supply system with the battery cells, batteries and the like disclosed by the application can be used for forming the power utilization device, so that the battery cell and the battery life are beneficial to alleviating and automatically adjusting the expansion force deterioration of the battery, supplementing the consumption of electrolyte and improving the stability of the battery performance.

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

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

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

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

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. Wherein the case 10 is used to provide an accommodation space for the battery cells 20. The number of the battery cells 20 in the battery 100 may be plural, and the plural battery cells 20 may be connected in series, parallel, or series-parallel, and series-parallel refers to that the plural battery cells 20 are connected in both series and parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10.

The case 10 may include a first case 101 and a second case 102, the first case 101 and the second case 102 being covered with each other to define a placement space for accommodating the battery cells 20. The first casing 101 and the second casing 102 may be various shapes, such as a rectangular parallelepiped, a cylinder, and the like. The first case 101 may have a hollow structure with one side opened, and the second case 102 may have a hollow structure with one side opened, and the open side of the second case 102 is closed to the open side of the first case 101 to form the case 10 having a space for placement.

The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

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

Some embodiments of the present application provide a battery cell 20, as shown in fig. 3 and 4, the battery cell 20 includes a housing 1, an electrode assembly 2, an electrode terminal 3, a switching member 4, and a heat conducting element 5, the housing 1 includes a wall portion 11, the electrode assembly 2 is accommodated in the housing 1, the electrode assembly 2 includes a tab 21, the electrode terminal 3 is disposed on the wall portion 11, the switching member 4 is used for electrically connecting the tab 21 and the electrode terminal 3, and the heat conducting element 5 is connected between the wall portion 11 and the switching member 4.

The case 1 may be a case 12 structure of the outer circumference of the battery cell 20, and is wrapped around the outer circumference of the electrode assembly 2, the switching member 4, and the like in the battery cell 20, so as to accommodate and protect the electrode assembly 2, the switching member 4, and the like in the battery cell 20.

Illustratively, the housing 1 includes a shell 12 and an end cap 13, the shell 12 and end cap 13 being interconnected. The wall 11 may be one wall of the housing 12 or may be the end cap 13. The electrode assembly 2 may include a positive electrode sheet, a negative electrode sheet, a separator film, and tabs 21 disposed on the positive and negative electrode sheets, the separator film being disposed between the positive and negative electrode sheets. The electrode assembly 2 is accommodated in the case 1, an electrolyte may be provided in the case 1, and the electrode assembly 2 accommodated in the case 1 may be immersed in the electrolyte.

The electrode terminal 3 may be a member of the battery cell 20 electrically connected to the tab 21, which is a terminal structure for electrical connection to an external device, and is connected to the wall 11 so as to be in good contact with the external device to transmit electric power in the battery cell 20 to the external device or to input electric power of the external device to the battery cell 20. The electrode terminal 3 may include a sheet-shaped conductive member or a block-shaped conductive member, for example, and the structural form of the electrode terminal 3 may be selected by those skilled in the art according to actual circumstances so that it can make good firm contact with external devices.

The switching member 4 may be a member for electrically connecting the tab 21 of the electrode assembly 2 with the electrode terminal 3, and the switching member 4 is electrically connected with the electrode terminal 3 and the tab 21 of the plurality of electrode assemblies 2 in the battery cell 20 such that current of the plurality of electrode assemblies 2 can flow to the electrode terminal 3 through the switching member 4 such that the plurality of electrode assemblies 2 in the battery cell 20 can be synchronously discharged or charged. Illustratively, the adapting member 4 may be made of a metal sheet with low resistivity, such as an aluminum sheet, a copper sheet, a silver sheet, etc., so as to reduce heat generated when a current flows through the adapting member 4 and improve the overcurrent capability of the adapting member 4.

The heat conductive member 5 may refer to a member having good heat conductive ability. By connecting the heat conducting element 5 between the wall 11 and the adapting member 4, the heat generated by the adapting member 4 can be quickly transferred to the wall 11 through the heat conducting element 5, thereby accelerating the diffusion of the heat to the surroundings and being beneficial to reducing the temperature of the adapting member 4.

In the above structure, since the heat conducting member 5 is connected between the wall portion 11 and the switching member 4, the heat generated on the switching member 4 of the battery cell 20 can be rapidly transferred to the wall portion 11 of the housing 1 through the heat conducting member 5, and further can be rapidly diffused outwards, so that the battery cell 20 has a strong heat dissipation capability, and the cycle performance of the battery cell 20 is improved.

In some embodiments, the heat conductive member 5 includes at least one of a heat conductive pad, a heat conductive paste, and a heat conductive grease.

The heat conducting pad is a high-performance gap filling heat conducting material, is mainly used for a transfer interface between components or products, has good viscosity, flexibility, good compression performance and good heat conductivity, and can completely exhaust air between the components so as to achieve sufficient contact and strengthen heat dissipation between the components. By making the heat conductive pad into the heat conductive member 5 so that the heat conductive member 5 is closely connected with the wall portion 11 and the switching member 4, the heat generated by the switching member 4 can be quickly transferred to the wall portion 11.

The heat-conducting adhesive can be heat-conducting silica gel, which is prepared by mixing organic silica gel as a main body, and polymer materials such as filling materials, heat-conducting materials and the like, and has good heat conduction and electrical insulation properties. The heat conducting piece 5 is made of heat conducting glue to connect the wall 11 and the adapting member 4, so that not only can the heat of the adapting member 4 be quickly transferred to the wall 11, but also the adapting member 4 can be connected with the wall 11.

The thermal grease has good thermal conductivity and can be used as a thermal conducting medium to be filled between the components. The heat conductive member 5 is formed using the heat conductive grease so that the heat conductive member 5 has a good heat conductive ability, and can rapidly transfer the heat generated by the switching member 4 to the wall portion 11.

In some embodiments, the thermally conductive member 5 is an insulating structure.

The insulating structure may be a structure having insulating properties, which is advantageous in reducing the possibility of a passage between the switching member 4 and the wall 11 and in reducing the possibility of leakage of the battery cell 20 by configuring the heat conductive member 5 as an insulating structure.

In some embodiments, the case 1 includes a case 12 and an end cap 13, the end cap 13 is a wall 11, the case 12 forms a cavity 14 having an opening, the end cap 13 covers the opening, and the electrode assembly 2 is disposed in the cavity 14.

The casing 12 and the end cover 13 are respectively part of structures in the casing 1, the casing 12 encloses a cavity 14 with an opening, the electrode assembly 2 and other components are arranged in the cavity 14, the end cover 13 seals the opening of the cavity 14, and the cavity 14 is sealed. The end cover 13 is configured as the wall 11 in the foregoing technical solution, the end cover 13 seals the opening of the cavity 14, so that the electrode terminal 3 of the battery cell 20 is disposed on the end cover 13, and the heat conducting member 5 is connected between the end cover 13 and the adapting member 4, so that the electrode terminal 3 of the battery cell 20 is disposed outside the end cover 13.

In some embodiments, as shown in fig. 5 and 6, the wall part 11 includes a first side 111 and a second side 112 that are disposed opposite to each other, the first side 111 facing the electrode assembly 2, the second side 112 facing the electrode terminal 3, and the first side 111 being provided with an insulating member 1111.

The first side 111 and the second side 112 may be two sides of the wall 11 that are disposed at opposite intervals, and between the two sides, the material forming the wall 11 is formed. Wherein the first side 111 is configured to be disposed toward the electrode assembly 2, the second side 112 is configured to be disposed toward the electrode terminal 3, and the wall 11 is located between the electrode assembly 2 and the electrode terminal 3.

The insulating member 1111 may be a structural layer having insulating properties, and by providing the insulating member 1111 on the first side 111 such that the wall portion 11 has insulating properties, the electrode assembly 2 and the electrode terminal 3 can be insulated.

In some embodiments, as shown in fig. 7, the insulating part 1111 is provided with a positioning hole 1112, the positioning hole 1112 penetrates the insulating part 1111 in the thickness direction of the insulating part 1111, and the heat conductive member 5 is provided in the positioning hole 1112 and connected to the wall 11 and the adapter member 4.

The positioning hole 1112 may be a hole-like structure provided on the insulating member 1111 for positioning the heat conductive member 5. By configuring the positioning hole 1112 to penetrate the insulating member 1111, the heat conducting member 5 can be in contact connection with the first side 111 of the wall portion 11 after being disposed in the positioning hole 1112, so that the heat conducting member 5 disposed in the positioning hole 1112 can be in contact connection with the wall portion 11 and the adapting member 4, so that the heat conducting member 5 can quickly transfer the heat generated by the adapting member 4 to the first side 111 of the wall portion 11, so that the heat can be quickly transferred to the second side 112, and further quickly spread into the air outside.

In some embodiments, the dimension L1 of the heat conductive member 5 is greater than the dimension L2 of the insulating member 1111 in the thickness direction of the insulating member 1111.

The dimension L1 of the heat conductive member 5 in the thickness direction of the insulating member 1111 is configured to be larger than the dimension L2 of the insulating member 1111 in the thickness direction of the insulating member 1111 such that a gap exists between the switching member 4 and the insulating member 1111. Since the heat generated by the switching member 4 can be diffused to the gap, the dimension L1 of the heat conductive member 5 in the thickness direction of the insulating part 1111 is larger than the dimension L2 of the insulating part 1111 in the direction, so that the heat dissipation of the switching member 4 can be accelerated, and the heat dissipation capability of the battery cell 20 can be improved.

In some embodiments, the thermally conductive member 5 is an interference fit with the positioning holes 1112.

Because the heat conducting piece 5 is inserted into the positioning hole 1112, the heat conducting piece 5 is in interference fit with the positioning hole 1112, so that the possibility of gaps between the heat conducting piece 5 and the inner wall of the positioning hole 1112 can be reduced, and the possibility of forming a passage between the electrode assembly 2 in the accommodating cavity 14 and the wall part 11 is reduced.

In some embodiments, the heat conducting element 5 is provided in plurality, and the adapting member 4 is connected to the wall 11 by the plurality of heat conducting elements 5.

Through setting up a plurality of heat-conducting pieces 5, switching component 4 is connected with wall portion 11 through a plurality of heat-conducting pieces 5 for switching component 4 can be through a plurality of heat-conducting pieces 5 with quick transfer to wall portion 11, has improved the heat dispersion of switching component 4.

In some embodiments, the adapter member 4 is provided with a protrusion 41, the wall portion 11 is provided with a through hole 112, the through hole 112 penetrates the wall portion 11 in the thickness direction of the wall portion 11, and at least part of the protrusion 41 is inserted into the through hole 112.

The protrusion 41 may be a structure protruding from the switching member 4, and the through hole 112 may be a through hole provided in the wall 11 in the thickness direction of the wall 11, so that not only the switching member 4 can be positioned in the wall 11, but also the electrode terminal 3 can be connected with the protrusion 41 through the through hole 112 by inserting at least part of the protrusion 41 into the through hole 112, thereby facilitating the outward supply of electric energy.

Some embodiments of the present application further provide a battery 100, where the battery 100 includes a plurality of battery cells 20 provided by the foregoing technical solutions, and the plurality of battery cells 20 are stacked.

Some embodiments of the present application further provide an electric device, where the electric device includes the battery 100 or the battery cell 20 provided by the above technical solution, and the battery 100 is used for providing electric energy.

According to some embodiments of the present application, there is provided a battery cell 20, the battery cell 20 including a case 1, an electrode assembly 2, an electrode terminal 3, a switching member 4, and a heat conductive member 5, the case 1 including a wall portion 11, the electrode assembly 2 being accommodated in the case 1, a first side 111 of the wall portion 11 facing the electrode assembly 2 and the switching member 4, a second side 112 facing the electrode terminal 3, the first side 111 being provided with an insulating part 1111 having a positioning hole 1112. The wall portion 11 is provided with a through hole 112, the protrusion 41 of the switching member 4 is inserted into the through hole 112 and connected with the electrode terminal 3, and the switching member 4 is connected with the tab 21 of the electrode assembly 2. The first side 111 of the wall 11 is provided with an insulating part 1111, the insulating part 1111 is provided with a positioning hole 1112, and the heat conducting element 5 is inserted into the positioning hole 1112 and connected with the first side 111 and the adapting member 4, so that heat generated by the adapting member 4 can be quickly transferred to the first side 111 through the heat conducting element 5 and dissipated to the surrounding through the second side 112.

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

Claims (12)

1. A battery cell, comprising:

a housing including a wall portion;

an electrode assembly accommodated in the case, the electrode assembly including a tab;

an electrode terminal provided on the wall portion;

a switching member for electrically connecting the tab and the electrode terminal;

and the heat conducting piece is connected between the wall part and the switching component.

2. The battery cell of claim 1, wherein the housing comprises a shell and an end cap, the shell forming a cavity having an opening, the end cap covering the opening, the electrode assembly disposed in the cavity;

the end cap is the wall.

3. The battery cell of claim 1, wherein the wall portion includes oppositely disposed first and second sides, the first side facing the electrode assembly and the second side facing away from the electrode assembly, the first side being provided with an insulating member.

4. The battery cell according to claim 3, wherein the insulating member is provided with a positioning hole penetrating the insulating member in a thickness direction of the insulating member, and the heat conductive member is disposed in the positioning hole and connected to the wall portion and the switching member.

5. The battery cell according to claim 4, wherein a dimension L1 of the heat conductive member is larger than a dimension L2 of the insulating member in a thickness direction of the insulating member.

6. The battery cell of claim 4, wherein the thermally conductive member is interference fit with the locating hole.

7. The battery cell of claim 1, wherein the thermally conductive member is an insulating structure.

8. The battery cell according to claim 1, wherein the heat conductive member is provided in plurality, and the switching member is connected to the wall portion through the plurality of heat conductive members.

9. The battery cell of claim 1, wherein the thermally conductive member comprises at least one of a thermally conductive pad, a thermally conductive paste, and a thermally conductive grease.

10. The battery cell according to claim 1, wherein the adapter member is provided with a projection, the wall portion is provided with a through hole penetrating the wall portion in a thickness direction of the wall portion, and at least a part of the projection is inserted into the through hole;

the electrode terminal covers the through hole and is connected to the bump.

11. A battery comprising a plurality of cells according to any one of claims 1 to 10.

12. An electrical device comprising a battery cell according to any one of claims 1 to 10 or a battery according to claim 11, said battery being adapted to provide electrical energy.