CN116454517A

CN116454517A - Battery monomer, battery, electric equipment and manufacturing equipment and method of battery monomer

Info

Publication number: CN116454517A
Application number: CN202210023684.1A
Authority: CN
Inventors: 阮启成; 谢仁鑫
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2023-07-18

Abstract

The application provides a battery monomer, a battery, electric equipment and manufacturing equipment and method of the battery monomer, and relates to the technical field of batteries. The battery cell includes a housing, an electrode assembly, a first tube, and a second tube; the first and second tubes are for containing a fluid medium; an electrode assembly is accommodated in the housing, the electrode assembly having a positive electrode tab and a negative electrode tab; the first pipe is arranged in the shell and connected with the positive electrode tab, and is provided with a first output part which at least partially extends out of the shell; the second pipe is arranged in the shell and connected with the negative electrode lug, and the second pipe is provided with a second output part which at least partially extends out of the shell; the first output part and the second output part are used for outputting the electric energy of the battery unit. The first pipe and the second pipe can strengthen the control capability to the inside temperature of the battery monomer, and the heat generated when the first output part and the second output part flow excessively can be taken away through the fluid medium in the first pipe and the second pipe, so that the whole temperature regulation of the battery monomer is realized.

Description

Battery monomer, battery, electric equipment and manufacturing equipment and method of battery monomer

Technical Field

The application relates to the technical field of batteries, in particular to a battery cell, a battery, electric equipment and manufacturing equipment and method of the battery cell.

Background

At present, smart phones, tablet personal computers, electric automobiles and the like are rapidly developed, and the application of lithium ion batteries is increasingly wide, so that higher requirements are also put forward for the lithium ion batteries.

The existing battery has some defects in structural design, so that the service life of the battery is short, and potential safety hazards exist. For example, the battery can generate a large amount of heat in the charge and discharge process, if the heat cannot be well emitted, thermal runaway can be generated, and explosion of the battery can be caused; in addition, if the battery is in an environment with too low a temperature, normal use of the battery may be affected. Therefore, how to adjust the temperature of the battery in a reasonable manner so as to reasonably and thermally manage the battery is a problem to be solved in the technical field of batteries.

Disclosure of Invention

The embodiment of the application provides a battery monomer, a battery, electric equipment and manufacturing equipment and method of the battery monomer, so as to solve the problem of poor temperature management capability of the battery monomer.

In a first aspect, embodiments herein provide a battery cell comprising a housing, an electrode assembly, a first tube, and a second tube; the electrode assembly is accommodated in the shell and is provided with a positive electrode tab and a negative electrode tab; the first pipe is arranged in the shell and connected with the positive electrode tab, is used for containing fluid medium and is provided with a first output part at least partially extending out of the shell; the second pipe is arranged in the shell and connected with the negative electrode tab, the second pipe is used for containing fluid medium, and the second pipe is provided with a second output part which at least partially extends out of the shell; the first output part and the second output part are used for outputting the electric energy of the battery unit.

In the technical scheme, the first pipe and the second pipe are arranged in the shell, and when the fluid medium in the first pipe and the second pipe is a cooling medium, the temperature in the battery monomer can be reduced, and the heat accumulation in the battery monomer can be effectively improved; when the fluid medium in the first pipe and the second pipe is heating medium, the temperature inside the battery monomer can be quickly increased, so that the battery monomer can normally supply power in the environment with lower temperature, and therefore, the first pipe and the second pipe are arranged in the shell, and the control capability of the temperature inside the battery monomer can be enhanced. And the first pipe and the second pipe respectively form a first output part and a second output part for outputting electric energy, so that the first output part and the second output part have larger current carrying capacity, and heat generated when the first output part and the second output part flow excessively can be taken away through fluid media in the first pipe and the second pipe, thereby realizing the integral temperature regulation of the battery monomer, enhancing the temperature control capacity of the battery monomer and further improving the reliability and the safety performance of the battery monomer.

In some embodiments of the first aspect of the present application, the electrode assembly has a first end and a second end arranged opposite in a first direction, the positive tab is disposed at the first end, and the negative tab is disposed at the second end; the first tube is at least partially located at the first end and connected with the positive electrode tab, and the second tube is at least partially located at the second end and connected with the negative electrode tab.

Among the above-mentioned technical scheme, anodal utmost point ear and negative pole utmost point ear set up in relative first end and second end, and first pipe is located first end and is connected with anodal utmost point ear at least partially, and the second pipe is located the second end and is connected with negative pole utmost point ear at least partially, and first pipe and second pipe of being convenient for rationally arrange in the shell, can not the mutual interference between first pipe and the second pipe, reduces the risk of battery monomer internal short circuit, improves battery monomer's security performance.

In some embodiments of the first aspect of the present application, the first tube includes a first connection portion and two first output portions, the two first output portions are communicated through the first connection portion, and the positive electrode tab is connected with the first connection portion; the second pipe comprises a second connecting part and two second output parts, the two second output parts are communicated through the second connecting part, and the negative electrode lug of the electrode assembly is connected with the second connecting part.

Among the above-mentioned technical scheme, first pipe includes two first output portions, and the second pipe includes two second output portions, makes things convenient for battery monomer and other parts to be connected in order to export battery monomer's electric energy, also can improve overcurrent capacity and improve battery monomer electric energy output's stability.

In some embodiments of the first aspect of the present application, the first pipe has a first inlet end into which the fluid medium flows and a first outlet end from which the fluid medium flows, the first inlet end and the first outlet end being respectively disposed on the two first output portions; the second pipe is provided with a second inlet end for the inflow of the fluid medium and a second outlet end for the outflow of the fluid medium, and the second inlet end and the second outlet end are respectively arranged on the two output parts.

According to the technical scheme, the fluid medium enters the first pipe from the first inlet end of the first pipe and is discharged from the first outlet end, the fluid medium enters the second pipe from the second inlet end of the second pipe and is discharged from the second outlet end of the second pipe, and the fluid medium flows in the first pipe and the second pipe, so that the temperature inside the battery cell is regulated, and the regulation mode is simple and convenient, rapid and efficient.

In some embodiments of the first aspect of the present application, the battery cell includes a plurality of electrode assemblies stacked along a second direction, the positive electrode tab and the negative electrode tab are disposed at opposite ends of the electrode assemblies along the first direction, and the second direction is perpendicular to the first direction; the positive electrode lugs of each electrode assembly are connected with the first pipe, and the negative electrode lugs of each electrode assembly are connected with the second pipe.

In the above technical scheme, the battery monomer includes a plurality of electrode assemblies, can improve the free capacity of battery, and the anodal utmost point ear and the first union coupling of every electrode assembly, the negative pole utmost point ear and the second union coupling of every electrode assembly to make the free electric energy of battery can be through first output and the stable output of second output.

In some embodiments of the first aspect of the present application, the first connecting portion extends at least partially from an electrode assembly located at one end in the second direction to an electrode assembly located at the other end in the second direction of the plurality of electrode assemblies; the second connection part extends at least partially from an electrode assembly located at one end in the second direction to an electrode assembly located at the other end in the second direction among the plurality of electrode assemblies.

In the above technical scheme, the first connecting portion of the first pipe extends from the electrode assembly at one end in the second direction to the electrode assembly at the other end in the second direction, and the second connecting portion of the second pipe extends from the electrode assembly at one end in the second direction to the electrode assembly at the other end in the second direction, so that the first connecting portion and the second connecting portion can both pass through each electrode assembly, the coverage area of the first pipe and the second pipe is increased, and the temperature regulation capability of the first pipe and the second pipe for the inside of the battery cell is improved.

In some embodiments of the first aspect of the present application, the first output portion and the second output portion each extend outside the housing along the second direction.

In the above technical scheme, the first output part and the second output part extend to the outside of the shell along the second direction, so that the size of the battery cell in other directions can be reduced, the space occupied by the battery cell in other directions is reduced, and the space placement of the battery cell is facilitated.

In some embodiments of the first aspect of the present application, the first output portion and the second output portion each extend along a third direction outside the housing, and the first direction, the second direction, and the third direction are perpendicular to each other.

In the technical scheme, the first output part and the second output part extend out of the shell along the third direction, so that the situation that the space arrangement of the battery monomer is influenced due to the fact that the size of the battery monomer in a certain direction is overlarge is avoided.

In some embodiments of the first aspect of the present application, the housing comprises a shell and an end cap; the housing has an opening; the end cover is used for sealing the opening, and is provided with a through hole; wherein the first and second output portions extend from the through hole to outside the housing.

In the above technical scheme, the first output part and the second output part extend from the through hole on the end cover to the outside of the shell, are sequentially adapted to the assembly process of the battery cell, are convenient for the assembly of the battery cell, and do not reduce the structural strength of the shell.

In a second aspect, embodiments of the present application provide a battery, including the battery cell provided in any embodiment of the first aspect.

In the above technical scheme, the first pipe and the second pipe are arranged in the shell of the battery monomer, so that the control capability of the internal temperature of the battery monomer can be enhanced, and the control capability of the internal temperature of the battery is enhanced. And the first pipe and the second pipe form a first output part and a second output part for outputting electric energy respectively, namely the first output part and the second output part have larger current carrying capacity, and heat generated when the first output part and the second output part flow excessively can be taken away through fluid media in the first pipe and the second pipe, so that the whole temperature regulation of the battery is realized, and the reliability and the safety performance of the battery are improved.

In some embodiments of the second aspect of the present application, the battery comprises a plurality of battery cells; the first tube of each cell communicates with the second tube, and the first tubes of adjacent two cells communicate with the second tube to form a first series channel containing a fluid medium.

According to the technical scheme, the first pipe and the second pipe of each battery cell are communicated, the first pipes of two adjacent battery cells are communicated with the second pipe to form the first serial channels for containing the fluid medium, the fluid medium can circulate in the first serial channels and sequentially flow through the first pipe and the second pipe of each battery cell, so that the temperature of each battery cell is regulated, and the temperature regulation is convenient and quick.

In some embodiments of the second aspect of the present application, the battery further includes a first communication pipe through which the first pipe and the second pipe of two adjacent battery cells communicate to form the first serial passage.

In the technical scheme, the first pipes and the second pipes of the two adjacent battery monomers are communicated through the first communication pipe, so that the first pipes and the second pipes of the battery monomers are conveniently connected in series to form a first serial channel, and the battery is convenient to assemble.

In some embodiments of the second aspect of the present application, the first communication tube is an insulating tube; the battery also comprises a first conductive piece, wherein the first output parts and the second output parts of two adjacent battery monomers are connected through the first conductive piece so as to realize the serial connection of the two adjacent battery monomers.

In the above technical scheme, the first communication pipe is an insulating pipe, and the first output part and the second output part of two adjacent battery monomers are connected through the first conductive piece, so that the series connection of the two adjacent battery monomers is realized, and the risk of internal short circuit of the battery monomers can be reduced.

In some embodiments of the second aspect of the present application, the first communication pipe is a conductive pipe, so as to realize the serial connection of the two adjacent battery cells.

Among the above-mentioned technical scheme, first connecting pipe is the electrically conductive pipe, and two adjacent battery monomer are realized establishing ties through first connecting pipe, and first connecting pipe can make fluidic medium circulate between two adjacent battery monomer, can also realize that these two adjacent battery monomer establish ties, has reduced the free inner structure of battery, can improve packaging efficiency.

In some embodiments of the second aspect of the present application, the battery comprises a plurality of battery cells; the first tubes of the plurality of battery cells are in communication in sequence to form a second series channel containing a fluid medium, and the second tubes of the plurality of battery cells are in communication in sequence to form a third series channel containing a fluid medium.

According to the technical scheme, the first pipes of the two adjacent battery monomers are sequentially communicated to form the second serial channels, the second pipes of the two adjacent battery monomers are sequentially communicated to form the second serial channels, then fluid medium can circulate in the second serial channels and the third serial channels, the fluid medium sequentially flows through the first pipes and the second pipes of each battery monomer, temperature regulation of each battery monomer is achieved, and the temperature regulation is convenient and rapid.

In some embodiments of the second aspect of the present application, the battery includes a second communication tube and a third communication tube; the first pipe of one battery cell is communicated with the first pipe of the other battery cell through the second communicating pipe to form the second serial passage, and the second pipe of the one battery cell is communicated with the second pipe of the other battery cell through the third communicating pipe to form the third serial passage.

In the above technical scheme, the first pipes of two adjacent battery monomers are communicated through the second communicating pipe, so that the first pipes of the battery monomers are conveniently connected in series to form a second serial channel, the second pipes of two adjacent battery monomers are communicated through the third communicating pipe, and the second pipes of the battery monomers are conveniently connected in series to form a third serial channel, thereby facilitating the assembly of the battery.

In some embodiments of the second aspect of the present application, the second communication tube and the third communication tube are both conductive tubes to realize parallel connection of the adjacent two battery cells.

In the above technical scheme, the second communicating pipe and the third communicating pipe are all conductive pipes, and two adjacent battery monomers are connected in series through the second communicating pipe and the third communicating pipe, so that fluid medium can circulate between two adjacent battery monomers, the two adjacent battery monomers can be connected in parallel, the internal structure of the battery monomers is reduced, and the assembly efficiency can be improved.

In some embodiments of the second aspect of the present application, the second communication tube and the third communication tube are both insulating tubes; the battery also comprises a second conductive piece and a third conductive piece, wherein the first output part of one battery monomer is connected with the first output part of the other battery monomer through the second conductive piece, and the second output part of the one battery monomer is connected with the second output part of the other battery monomer through the third conductive piece, so that the two adjacent battery monomers are connected in parallel.

In the above technical scheme, the second communicating pipe and the third communicating pipe are insulating pipes, the first output parts of two adjacent battery monomers are connected through the second conductive piece, and the second output parts of two adjacent battery monomers are connected through the third conductive piece, so that the two adjacent battery monomers are connected in parallel, and the risk of internal short circuit of the battery monomers can be reduced.

In a third aspect, embodiments of the present application provide a powered device, including a battery provided by embodiments of the second aspect, where the battery is configured to provide electrical energy.

In the above technical scheme, the electric equipment provides electric energy through the battery that the second aspect embodiment provided, can effectively adjust the inside temperature of battery to guarantee battery power supply reliability, improve the power consumption safety.

In a fourth aspect, embodiments of the present application provide an apparatus for manufacturing a battery cell, including a providing device and an assembling device; the providing device is used for providing a shell, an electrode assembly, a first pipe and a second pipe, wherein the electrode assembly is provided with a positive electrode tab and a negative electrode tab, and the first pipe and the second pipe are used for containing fluid media; the assembly device is configured to dispose an electrode assembly within the housing, dispose the first tube within the housing and connect with the positive electrode tab such that the first tube has a first output portion that extends at least partially outside the housing, and dispose the second tube within the housing and connect with the negative electrode tab such that the first tube has a second output portion that extends at least partially outside the housing; the first output part and the second output part are opposite in polarity and are used for outputting the electric energy of the battery cell.

In a fifth aspect, embodiments of the present application provide a method for manufacturing a battery cell, including:

providing a housing, an electrode assembly having a positive tab and a negative tab, a first tube and a second tube, each for containing a fluid medium;

Disposing the electrode assembly within the housing;

the first pipe is arranged in the shell and connected with the positive electrode tab, so that the first pipe is provided with a first output part which at least partially extends out of the shell;

disposing the second tube within the housing and connecting with the negative tab such that the first tube has a second output portion extending at least partially outside the housing;

the first output part and the second output part are opposite in polarity and are used for outputting the electric energy of the battery cell.

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

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a battery provided in some embodiments of the present application;

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

FIG. 4 is a schematic illustration of the connection of an electrode assembly to a first tube and a second tube provided in some embodiments of the present application;

FIG. 5 is an isometric view of an electrode assembly provided in some embodiments of the present application after connection to a first tube and a second tube;

fig. 6 is a schematic structural view of a battery cell (the housing of the case is not shown) according to other embodiments of the present application;

fig. 7 is a schematic structural view of a battery cell (showing a housing of a case) according to other embodiments of the present application;

FIG. 8 is a schematic structural view of an end cap provided in some embodiments of the present application;

fig. 9 is a schematic structural view of a battery according to further embodiments of the present application;

fig. 10 is a schematic structural view of a battery according to other embodiments of the present application;

fig. 11 is a schematic structural view of a battery provided in further embodiments of the present application;

fig. 12 is a schematic structural view of a manufacturing apparatus for a battery cell according to some embodiments of the present application;

fig. 13 is a flowchart of a method for manufacturing a battery cell according to some embodiments of the present application.

Icon: 1000-vehicle; 100-cell; 10-a box body; 11-accommodation space; 12-a first part; 13-a second part; 20-battery cells; 21-a housing; 211-a housing; 2111-opening; 212-end caps; 2121-through holes; 2122-pressure release mechanism; 2123-priming holes; 22-electrode assembly; 221-positive electrode tab; 222-a negative electrode tab; 223-first end; 224-second end; 22 a-a first head-end electrode assembly; 22 b-a first trailing electrode assembly; 23-a first tube; 231-a first output; 2311-a first inlet end; 2312-a first outlet end; 232-a first connection; 2321-a first bending section; 2322-a second bending section; 2323-a third bending section; 2324-fourth bending section; 2325-a fifth bending section; 24-a second tube; 241-a second output; 2411-a second inlet end; 2412-a second outlet end; 242-a second connection; 2421-sixth bending section; 2422-seventh bending section; 2423-eighth bending section; 2424-a ninth bend; 2425-tenth bending section; 25-a first adapter; 26-a second adapter; 27-a first clamping member; 28-a second clamping member; 29-tie-down; 210-insulating seal; 30-a first communication pipe; 40-a first conductive member; 50-a second communicating tube; 60-a third communicating tube; 200-a controller; 300-motor; 2000-manufacturing equipment of battery cells; 2100-providing means; 2200-assembling the device; x-a first direction; y-a second direction; z-third direction.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present application, it should be noted that, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is conventionally put in use of the product of the application, or the orientation or positional relationship that is conventionally understood by those skilled in the art, merely for convenience of describing the present application and simplifying the description, and is not indicative or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

Along with the progress of battery monomer charge and discharge, battery monomer heat can gather gradually, and the inside temperature of battery monomer can rise gradually, if not in time reduces the inside temperature of battery monomer, and the inside temperature of battery monomer rises to the reliability that can influence the battery to a certain extent, still can cause the safety problem when serious. And when the battery is charged and discharged through the electrode terminal, the electrode terminal can generate heat, so that the influence on the reliability and safety performance of the battery cell is further increased. And under the condition that the temperature of the use environment of the battery monomer is very low, the viscosity of the electrolyte is reduced, the conductivity is reduced, and the activity of active substances is also reduced, so that the working performance of the battery monomer can be influenced, and the internal temperature of the battery monomer needs to be improved to ensure that the battery monomer can normally supply power.

The inventor finds that in order to realize the temperature regulation of the battery monomer, a water cooling pipe can be arranged outside the shell of the battery monomer, and the temperature of the battery monomer can only be controlled by reducing the temperature of the battery monomer or increasing the temperature of the battery monomer, so that the temperature control capability of the battery monomer is weak. In order to improve the control capability of the temperature inside the battery cell, the water cooling pipe can be arranged inside the battery cell, and the arrangement can adjust the temperature inside the battery cell, but the heat generated by the electrode terminal in the process of charging and discharging the battery cell through the electrode terminal is difficult to release, so that the thermal management capability of the battery cell is poor.

Based on the above-mentioned consideration, this application embodiment provides a battery monomer, first pipe and second pipe set up in the shell and first pipe and second pipe form the first output portion and the second output portion of output electric energy respectively, when the fluid medium in first pipe and the second pipe is coolant, can reduce the inside temperature of battery monomer, the inside heat gathering of effectual improvement battery monomer, when the fluid medium in first pipe and the second pipe is heating medium, can improve the inside temperature of battery monomer fast, so that battery monomer can normally supply power in the lower environment of temperature, consequently, first pipe and second pipe set up in the shell, can strengthen the controllability to the inside temperature of battery monomer.

And the first pipe and the second pipe respectively form a first output part and a second output part for outputting electric energy, so that the first output part and the second output part have larger current carrying capacity, and heat generated when the first output part and the second output part flow excessively can be taken away through fluid media in the first pipe and the second pipe, thereby realizing the integral temperature regulation of the battery monomer, enhancing the temperature control capacity of the battery monomer and further improving the reliability and the safety performance of the battery monomer.

The battery cell disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. The power supply system with the electric equipment can be formed by the battery monomer, the battery and the like, so that the temperature control capability of the battery monomer is enhanced, and the reliability and the safety performance of the battery monomer are improved.

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 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 equipment in particular.

For convenience of description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The 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 a schematic structural diagram 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.

The case 10 is used to provide an accommodating space 11 for the battery cells 20. In some embodiments, the case 10 may include a first portion 12 and a second portion 13, the first portion 12 and the second portion 13 being overlapped with each other to define a receiving space 11 for receiving the battery cell 20. Of course, the connection between the first portion 12 and the second portion 13 may be sealed by a sealing member (not shown), which may be a sealing ring, a sealant, or the like.

The first portion 12 and the second portion 13 may be of various shapes, such as a rectangular parallelepiped, a cylinder, etc. The first portion 12 may be a hollow structure with one side opened to form a receiving cavity, and the second portion 13 may be a hollow structure with one side opened to form a receiving cavity, and the opening side of the second portion 13 is closed to the opening side of the first portion 12, so as to form the case 10 having the receiving space 11. Of course, the first portion 12 may be a hollow structure with one side opened to form the accommodating chamber, the second portion 13 may be a plate-like structure, and the second portion 13 may be covered on the opening side of the first portion 12 to form the case 10 having the accommodating space 11.

In the battery 100, the number of the battery cells 20 may be one or a plurality. If there are multiple battery cells 20, the multiple battery cells 20 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to that there are both series connection and parallel connection among the multiple battery cells 20. 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, a plurality of battery cells 20 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form a whole and be accommodated in the case 10. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc. Fig. 2 exemplarily shows a case where the battery cell 20 has a rectangular parallelepiped shape.

Referring to fig. 3 and 4 in combination, fig. 3 is a schematic structural diagram of a battery cell 20 according to some embodiments of the present application, and fig. 4 is a schematic connecting diagram of an electrode assembly 22, a first tube 23 and a second tube 24 according to some embodiments of the present application. Some embodiments of the present application provide a battery cell 20, the battery cell 20 including a housing 21, an electrode assembly 22, a first tube 23, and a second tube 24; the electrode assembly 22 is accommodated in the case 21, and the electrode assembly 22 has a positive electrode tab 221 and a negative electrode tab 222; the first tube 23 is disposed in the housing 21 and connected to the positive electrode tab 221, the first tube 23 is for containing a fluid medium, and the first tube 23 has a first output portion 231 extending at least partially outside the housing 21; the second tube 24 is disposed in the housing 21 and connected to the negative tab 222, the second tube 24 is configured to accommodate a fluid medium, and the second tube 24 has a second output portion 241 extending at least partially outside the housing 21; the first output unit 231 and the second output unit 241 are used to output the electric power of the battery cell 20.

The case 21 includes a housing 211 and an end cap 212, one end of the housing 211 being provided with an opening 2111, and the end cap 212 for closing the opening 2111 of the housing 211 to accommodate the electrode assembly 22 inside the case 21.

The housing 21 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like. The shape of the case 21 may be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 has a cylindrical structure, the case 21 may alternatively have a cylindrical structure; if the electrode assembly 22 has a rectangular parallelepiped structure, the case 21 may alternatively have a rectangular parallelepiped structure. Fig. 3 and 4 exemplarily show a case where the case 21 and the electrode assembly 22 are rectangular parallelepiped.

The material of the housing 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which is not particularly limited in the embodiment of the present application.

Electrode assembly 22 includes electrode assembly 22 may include a positive electrode sheet (not shown), a negative electrode sheet (not shown), and a separator (not shown). The electrode assembly 22 may be a wound structure formed by winding a positive electrode sheet, a separator, and a negative electrode sheet, or may be a stacked structure formed by stacking a positive electrode sheet, a separator, and a negative electrode sheet. The electrode assembly 22 further includes a positive electrode tab 221 and a negative electrode tab 222, and may be a positive electrode current collector without a positive electrode active material layer in the positive electrode sheet as the positive electrode tab 221, and may be a negative electrode current collector without a negative electrode active material layer in the negative electrode sheet as the negative electrode tab 222.

The battery cell 20 may include one electrode assembly 22, or may include a plurality of electrode assemblies 22. Wherein, the plurality refers to two or more.

The first tube 23 is disposed in the housing 21, which means that the first tube 23 is disposed in the housing 21 except for a portion extending to the housing 21 as the first output portion 231; the second pipe 24 is disposed in the housing 21, which means that the second pipe 24 is disposed in the housing 21 except for a portion extending to the housing 21 as the second output portion 241.

The first tube 23 and the second tube 24 are each pipes made of conductive material, and the fluid medium may be insulating oil or other medium that is not conductive. The fluid medium may be a cooling medium for reducing the temperature of the battery cells 20; the bulk medium may be a heating medium for elevating the internal temperature of the battery cell 20.

The connection of the first tube 23 to the positive electrode tab 221 may be a direct connection, such as direct welding of the first tube 23 to the positive electrode tab 221. The connection between the first tube 23 and the positive electrode tab 221 may also be an indirect connection, for example, the battery cell 20 further includes a first adaptor 25, and the positive electrode tab 221 and the first tube 23 are electrically connected through the first adaptor 25. In some embodiments, the electrode assembly 22 has a plurality of positive tabs 221, the first adaptor 25 may be interposed between the positive tabs 221 of the electrode assembly 22, the positive tab 221 closest to the first adaptor 25 of the plurality of positive tabs 221 may be directly electrically connected to the first adaptor 25, and another portion of the plurality of positive tabs 221 may be electrically connected to the positive tab 221 closest to the first adaptor 25 by being electrically connected to the first adaptor 25, thereby achieving indirect electrical connection to the first adaptor 25. In an embodiment in which the electrode assembly 22 is a wound electrode assembly, the first tab 25 may be inserted into a winding center hole of the electrode assembly 22.

The connection of the second tube 24 to the negative tab 222 may be a direct connection, such as a direct welding of the second tube 24 to the negative tab 222. The connection between the second tube 24 and the negative tab 222 may also be an indirect connection, for example, the battery cell 20 further includes a second adapter 26, and the negative tab 222 and the second tube 24 are electrically connected through the second adapter 26. In some embodiments, the electrode assembly 22 has a plurality of negative tabs 222, the second adapter 26 may be interposed between the negative tabs 222 of the electrode assembly 22, the negative tab 222 closest to the second adapter 26 of the plurality of negative tabs 222 is directly electrically connected to the second adapter 26, and another portion of the plurality of negative tabs 222 may be electrically connected to the negative tab 222 closest to the second adapter 26, thereby achieving indirect electrical connection to the second adapter 26. In embodiments in which electrode assembly 22 is a rolled electrode assembly, second adapter 26 may be inserted into a rolled central bore of electrode assembly 22.

The portion of the first tube 23 extending out of the housing 21 forms a first output portion 231, the portion of the second tube 24 extending out of the housing 21 forms a second output portion 241, and the first output portion 231 and the second output portion 241 are used to output the electric power of the battery cell 20, so that the battery cell 20 may not be additionally provided with an electrode terminal. Wherein the first tube 23 may extend from the housing 211 of the housing 21 to form the first output 231, and the first tube 23 may also extend from the end cap 212 of the housing 21 to form the first output 231; the second tube 24 may extend from the housing 211 of the housing 21 to form a second output portion 241, and the second tube 24 may also extend from the end cap 212 of the housing 21 to form a second output portion 241.

The first pipe 23 and the second pipe 24 are arranged in the shell 21, when the fluid medium in the first pipe 23 and the second pipe 24 is a cooling medium, the temperature in the battery cell 20 can be reduced, and the heat accumulation in the battery cell 20 can be effectively improved; when the fluid medium in the first tube 23 and the second tube 24 is a heating medium, the temperature inside the battery cell 20 can be quickly increased, so that the battery cell 20 can normally supply power in an environment with low temperature, and therefore, the first tube 23 and the second tube 24 are arranged in the housing 21, and the control capability of the temperature inside the battery cell 20 can be enhanced. And, the first pipe 23 and the second pipe 24 respectively form a first output part 231 and a second output part 241 for outputting electric energy, so that the first output part 231 and the second output part 241 have larger current carrying capacity, and heat generated when the first output part 231 and the second output part 241 overflow can be taken away through fluid media in the first pipe 23 and the second pipe 24, thereby realizing the overall temperature regulation of the battery cell 20, enhancing the temperature management and control capability of the battery cell 20, and further improving the reliability and the safety performance of the battery cell 20.

The first and second tubes 23 and 24 are arranged in different manners according to the arrangement of the positive and negative tabs 221 and 222 of the electrode assembly 22. As shown in fig. 5, in some embodiments, the electrode assembly 22 has a first end 223 and a second end 224 disposed opposite in the first direction X, the positive tab 221 is disposed at the first end 223, and the negative tab 222 is disposed at the second end 224; the first tube 23 is at least partially positioned at the first end 223 and connected to the positive tab 221, and the second tube 24 is at least partially positioned at the second end 224 and connected to the negative tab 222.

Alternatively, as shown in fig. 4 and 5, the first tube 23 may be partially positioned at the first end 223, and another portion may extend from the first end 223 to between the first end 223 and the second end 224 and extend from between the first end 223 and the second end 224 to outside the housing 21 to form the first output 231 between the first end 223 and the second end 224. The second tube 24 may be partially located at the second end 224, with another portion extending from the second end 224 to between the first end 223 and the second end 224, and from between the first end 223 and the second end 224 to outside the housing 21 to form a second output 241 between the first end 223 and the second end 224.

Of course, as shown in fig. 6, the first tube 23 may be located entirely at the first end 223, and a portion of the first tube 23 extends outside the housing 21 at the first end 223 to form the first output portion 231. The second tube 24 may be entirely located at the second end 224, with a portion of the second tube 24 extending outside the housing 21 at the second end 224 to form a second output 241.

It should be noted that, in some embodiments, the positive electrode tab 221 and the negative electrode tab 222 may be disposed at the same end of the electrode assembly 22 in the first direction X, and at least a portion of the first tube 23 and at least a portion of the second tube 24 are disposed at one ends of the positive electrode tab 221 and the negative electrode tab 222 and are electrically connected to the positive electrode tab 221 and the negative electrode tab 222, respectively.

The positive pole tab 221 and the negative pole tab 222 are arranged at the first end 223 and the second end 224 which are opposite, the first pipe 23 is at least partially positioned at the first end 223 and connected with the positive pole tab 221, the second pipe 24 is at least partially positioned at the second end 224 and connected with the negative pole tab 222, the first pipe 23 and the second pipe 24 are conveniently and reasonably arranged in the shell 21, the first pipe 23 and the second pipe 24 cannot interfere with each other, the risk of internal short circuit of the battery cell 20 is reduced, and the safety performance of the battery cell 20 is improved.

As shown in fig. 5, in some embodiments, the first tube 23 includes a first connection portion 232 and two first output portions 231, the two first output portions 231 are communicated through the first connection portion 232, and the positive electrode tab 221 is connected to the first connection portion 232; the second tube 24 includes a second connection portion 242 and two second output portions 241, the two second output portions 241 being communicated through the second connection portion 242, and the negative electrode tab 222 of the electrode assembly 22 being connected to the second connection portion 242.

In the present embodiment, the first connection portion 232 of the first tube 23 and the second connection portion 242 of the second tube 24 are both located within the housing 21. The two first output portions 231 are respectively connected to two ends of the first connection portion 232 along the extending direction thereof, and the first connection portion 232 may extend straight or may extend in a curved manner. The two second output portions 241 are respectively connected to two ends of the second connection portion 242 along the extending direction thereof, and the second connection portion 242 may extend in a straight line or may extend in a curved manner.

Alternatively, in other embodiments, the battery cell 20 may have only one first output 231 and one second output 241.

The first pipe 23 includes two first output parts 231, and the second pipe 24 includes two second output parts 241, which facilitate connection of the battery cells 20 with other components to output the electric power of the battery cells 20, and also improve the overcurrent capacity and the stability of the electric power output of the battery cells 20.

The first tube 23 and the second tube 24 may be closed pipes, and the fluid medium is enclosed in the first tube 23 and the second tube 24. The first and second pipes 23 and 24 may be pipes open at both ends so that the fluid medium can flow in from one end of the first pipe 23 and out from the other end of the first pipe 23, and the fluid medium can flow in from one end of the second pipe 24 and out from the other end of the second pipe 24. Referring to fig. 5, in some embodiments, the first pipe 23 has a first inlet end 2311 for flowing in the fluid medium and a first outlet end 2312 for flowing out the fluid medium, and the first inlet end 2311 and the first outlet end 2312 are respectively disposed on the two first output parts 231; the second pipe 24 has a second inlet end 2411 for inflow of the fluid medium and a second outlet end 2412 for outflow of the fluid medium, and the second inlet end 2411 and the second outlet end 2412 are respectively provided on two output parts.

In the present embodiment, the two first output parts 231 can be connected to external power equipment such that fluid medium is injected into the first and second pipes 23 and 24 and flows in the first and second pipes 23 and 24, and the fluid medium can exchange heat with the inside of the battery cell 20 during the flow in the first and second pipes 23 and 24. The first pipe 23 and the second pipe 24 may be connected to the same power plant or may be connected to different power plants.

The fluid medium enters the first pipe 23 from the first inlet end 2311 of the first pipe 23 and exits the first pipe 23 from the first outlet end 2312, the fluid medium enters the second pipe 24 from the second inlet end 2411 of the second pipe 24 and exits the second pipe 24 from the second outlet end 2412, and the fluid medium flows in the first pipe 23 and the second pipe 24, thereby adjusting the temperature inside the battery cell 20, the adjustment is simple and convenient, and the temperature inside the battery cell 20 can be quickly adjusted.

As shown in fig. 5 and 6, in some embodiments, the battery cell 20 includes a plurality of electrode assemblies 22, the plurality of electrode assemblies 22 are stacked along a second direction Y, and the positive electrode tab 221 and the negative electrode tab 222 are disposed at opposite ends of the electrode assemblies 22 along a first direction X, the second direction Y being perpendicular to the first direction X; the positive electrode tab 221 of each electrode assembly 22 is connected to the first tube 23, and the negative electrode tab 222 of each electrode assembly 22 is connected to the second tube 24.

The first direction X coincides with the height direction of the electrode assembly, and the second direction Y coincides with the thickness direction of the electrode assembly.

The positive electrode tab 221 of each electrode assembly 22 is disposed at the first end 223, the negative electrode tab 222 of each electrode assembly 22 is disposed at the second end 224, and after the plurality of electrode assemblies 22 are stacked along the second direction Y, the positive electrode tabs 221 of all electrode assemblies 22 are disposed on the same side of the electrode assemblies 22 in the first direction X, and the negative electrode tabs 222 of all electrode assemblies 22 are disposed on the same side of the electrode assemblies 22 in the first direction X, so that the first tubes 23 and the second tubes 24 are disposed.

A portion of the first connection portion 232 of the first tube 23 is positioned at the first end 223 and is electrically connected to the positive tab 221 of each electrode assembly 22, and a portion of the second connection portion 242 of the second tube 24 is positioned at the second end 224 and is electrically connected to the negative tab 222 of each electrode assembly 22.

In the embodiment where the battery cell 20 includes the first adaptor 25 and the second adaptor 26, the battery cell 20 may include a plurality of first adaptors 25, where the first adaptors 25 are disposed in a one-to-one correspondence with the electrode assemblies 22, the first adaptors 25 are configured to electrically connect the positive electrode tabs 221 of the corresponding electrode assemblies 22 with the first connection portions 232, and if the electrode assemblies 22 are wound electrode assemblies, the first adaptors 25 may also be inserted into the winding central holes of the electrode assemblies 22; the battery cell 20 may include a plurality of second adapters 26, where the second adapters 26 are disposed in a one-to-one correspondence with the electrode assemblies 22, the second adapters 26 are configured to electrically connect the negative electrode tabs 222 of the corresponding electrode assemblies 22 with the second connection portions 242, and if the electrode assemblies 22 are wound electrode assemblies, the second adapters 26 may also be inserted into the winding central holes of the electrode assemblies 22.

The battery cell 20 includes a plurality of electrode assemblies 22, which can increase the capacity of the battery cell 20, the positive electrode tab 221 of each electrode assembly 22 is connected to the first pipe 23, and the negative electrode tab 222 of each electrode assembly 22 is connected to the second pipe 24, so that the electric power of the battery cell 20 can be stably output through the first output part 231 and the second output part 241.

In order to secure stability of the stacking arrangement of the plurality of electrode assemblies 22 in the second direction Y, as shown in fig. 5, in some embodiments, the battery cell 20 further includes first and second holders 27 and 28, the first and second holders 27 and 28 being spaced apart in the second direction Y, and all of the electrode assemblies 22 being sandwiched between the first and second holders 27 and 28 by the first and second holders 27 and 28 to secure stacking stability of the plurality of electrode assemblies 22.

As shown in fig. 5, in some embodiments, the battery cell 20 further includes a tie member 29, and the tie member 29 is wound around the outer circumferences of the first clamping member 27, the plurality of electrode assemblies 22, and the second clamping member 28 such that the first clamping member 27, the plurality of electrode assemblies 22, and the second clamping member 28 are formed as a unitary structure.

As shown in fig. 5 and 6, in some embodiments, the first connection 232 extends at least partially from one end of the plurality of electrode assemblies 22 located in the second direction Y to the other end of the electrode assembly 22 located in the second direction Y; the second connection part 242 extends at least partially from the electrode assembly 22 located at one end in the second direction Y to the electrode assembly 22 located at the other end in the second direction Y among the plurality of electrode assemblies 22.

The first connection part 232 may be an electrode assembly 22 extending from one end of the electrode assembly 22 in the second direction Y to the other end thereof in the second direction Y in a straight line, along a folding line, or in an arc line, or the like. The second connection part 242 may be an electrode assembly 22 extending from one end of the electrode assembly 22 in the second direction Y to the other end thereof in the second direction Y in a straight line, along a folding line, or in an arc line, or the like.

As shown in fig. 5, the first connecting portion 232 includes a first bending section 2321, a second bending section 2322, a third bending section 2323, a fourth bending section 2324 and a fifth bending section 2325 that are sequentially connected.

Second bend 2322, third bend 2323, and fourth bend 2324 are located at first end 223. The second bending segments 2322 and the fourth bending segments 2324 are arranged at intervals along the third direction Z and extend along the second direction Y, and each of the second bending segments 2322 and the fourth bending segments 2324 extends from the electrode assemblies 22 of the plurality of electrode assemblies 22 of the battery cell 20 located at one end of the second direction Y to the electrode assemblies 22 located at the other end of the second direction Y. The third bending section 2323 extends linearly along the third direction Z, and two ends of the third bending section 2323 along the third direction Z are respectively communicated with the second bending section 2322 and the fourth bending section 2324, so that the second bending section 2322, the third bending section 2323 and the fourth bending section 2324 form a U-shaped structure, so that the first connection portion 232 extends along the folding line. In some embodiments, second bending section 2322, third bending section 2323, and fourth bending section 2324 may also form a C-shape such that first connection 232 extends along an arc.

The first bending section 2321 is connected to an end of the second bending section 2322 away from the third bending section 2323, and the fifth bending section 2325 is connected to an end of the fourth bending section 2324 away from the third bending section 2323. One first output portion 231 is connected to an end of the first bending section 2321 away from the second bending section 2322, and the other first output portion 231 is connected to an end of the fifth bending section 2325 away from the fourth bending section 2324. The first bend 2321 and the fifth bend 2325 are spaced apart along the third direction Z. The first bending section 2321 and the second bending section 2322 each extend from the first end 223 in a direction toward the second end 224 such that the two first output portions 231 are located between the first end 223 and the second end 224 and extend from between the first end 223 and the second end 224 to outside the housing 21.

In some embodiments, the first connection portion 232 may include only a second bending section 2322, where the second bending section 2322 extends linearly along the second direction Y, and two ends of the second bending section 2322 along the second direction Y are respectively communicated with the two first output portions 231, and the two first output portions 231 respectively extend out of the housing along opposite directions in the second direction Y.

The second connection portion 242 includes a sixth bending section 2421, a seventh bending section 2422, an eighth bending section 2423, a ninth bending section 2424 and a tenth bending section 2425.

Seventh bending section 2422, eighth bending section 2423 and ninth bending section 2424 are located at second end 224. The seventh and ninth bending sections 2422 and 2424 are spaced apart in the third direction Z and extend in the second direction Y, and each of the seventh and ninth bending sections 2422 and 2424 extends from the electrode assembly 22 at one end of the second direction Y to the electrode assembly 22 at the other end of the second direction Y of the plurality of electrode assemblies 22 of the battery cell 20. The eighth bending section 2423 extends along the third direction Z, and two ends of the eighth bending section 2423 along the third direction Z are respectively communicated with the seventh bending section 2422 and the ninth bending section 2424, so that the seventh bending section 2422, the eighth bending section 2423 and the ninth bending section 2424 form a U-shaped structure, and the second connecting portion 242 extends along the folding line. In some embodiments, seventh bending section 2422, eighth bending section 2423, and ninth bending section 2424 may also form a C-shape such that second connection 242 extends in an arc.

Sixth bending section 2421 is connected to an end of seventh bending section 2422 remote from eighth bending section 2423, and tenth bending section 2425 is connected to an end of ninth bending section 2424 remote from eighth bending section 2423. One second output portion 241 is connected to an end of the sixth bending section 2421 away from the seventh bending section 2422, and the other second output portion 241 is connected to an end of the tenth bending section 2425 away from the ninth bending section 2424. Sixth and tenth bending sections 2421 and 2425 are spaced apart along third direction Z. The sixth and seventh bending sections 2421 and 2422 each extend from the second end 224 in a direction toward the first end 223 such that the two second output portions 241 are located between the first and second ends 223 and 224 and extend outside the housing 21 from between the first and second ends 223 and 224.

As shown in fig. 5, the battery cell 20 includes fifteen electrode assemblies 22, and the electrode assemblies 22 located at both ends of the fifteen electrode assemblies 22 in the second direction Y are defined as a first head electrode assembly 22a and a first tail electrode assembly 22b, respectively. The first clamping member 27 is located on a side of the first head electrode assembly 22a facing away from the first tail electrode assembly 22b, and the second clamping member 28 is located on a side of the first tail electrode assembly 22b facing away from the first head electrode assembly 22 a. The second bending section 2322 and the fourth bending section 2324 are arranged at the first end 223 at intervals along the third direction Z and are connected with the positive electrode tab 221. The second bend 2322 and the fourth bend 2324 each extend from the first head electrode assembly 22a to the first tail electrode assembly 22b along the second direction Y. The third bending segment 2323 is disposed corresponding to the first tail electrode assembly 22b and extends along the third direction Z, and two ends of the third bending segment 2323 in the third direction Z are respectively communicated with the second bending segment 2322 and the fourth bending segment 2324. The first bending section 2321 and the fifth bending section 2325 are disposed at a side of the first clamping member 27 away from the first head end electrode assembly 22a along the third direction Z at intervals, and the first bending section 2321 and the fifth bending section 2325 are respectively connected with the second bending section 2322 and the fourth bending section 2324. Two first output parts 231 are located at a side of the first clamping member 27 facing away from the first head-end electrode assembly 22a and between the first end 223 and the second end 224.

The seventh bending section 2422 and the ninth bending section 2424 are arranged at intervals in the third direction Z at the first end 223 and are connected with the negative electrode tab 222. Each of the seventh bending section 2422 and the ninth bending section 2424 extends from the first head electrode assembly 22a to the first tail electrode assembly 22b in the second direction Y. The eighth bending section 2423 is disposed corresponding to the first trailing electrode assembly 22b and extends in the third direction Z, and both ends of the eighth bending section 2423 in the third direction Z are respectively in communication with the seventh bending section 2422 and the ninth bending section 2424. The sixth bending section 2421 and the tenth bending section 2425 are disposed at a side of the first clamping member 27 away from the first head electrode assembly 22a at intervals along the third direction Z, and the sixth bending section 2421 and the tenth bending section 2425 are connected with the seventh bending section 2422 and the ninth bending section 2424, respectively. The two second output portions 241 are located on the side of the first clamping member 27 facing away from the first head-end electrode assembly 22a and between the first end 223 and the second end 224.

In some embodiments, the second connecting portion 242 may include only a seventh bending section 2422, where the seventh bending section 2422 extends along the second direction Y in a straight line, so that the second connecting portion 242 extends along a straight line, and two ends of the seventh bending section 2422 along the second direction Y are respectively communicated with the two second output portions 241, and the two second output portions 241 extend out of the housing along opposite directions in the second direction Y.

In other embodiments, the first and second connection portions 232 and 242 may be in other forms. For example, as shown in fig. 6 and 7, the first connecting portion 232 includes a first bending section 2321, a second bending section 2322, a third bending section 2323, a fourth bending section 2324 and a fifth bending section 2325 that are sequentially connected.

The second bending segments 2322 and the fourth bending segments 2324 are arranged at intervals along the second direction Y and extend along the third direction Z, and the second bending segments 2322 and the fourth bending segments 2324 are respectively disposed corresponding to two electrode assemblies 22 of the plurality of electrode assemblies 22 located at two ends of the second direction Y. The third bending section 2323 extends linearly along the second direction Y, and both ends of the third bending section 2323 along the second direction Y are respectively communicated with the second bending section 2322 and the fourth bending section 2324, so that the third bending section 2323 can extend from the electrode assembly 22 located at one end of the plurality of electrode assemblies 22 in the second direction Y to the electrode assembly 22 located at the other end of the plurality of electrode assemblies 22 in the second direction Y. The second bending section 2322, the third bending section 2323 and the fourth bending section 2324 form a U-shaped structure, so that the first connection portion 232 extends along a folding line. In some embodiments, second bending section 2322, third bending section 2323, and fourth bending section 2324 may also form a C-shape such that first connection 232 extends along an arc.

The first bending section 2321 and the fifth bending section 2325 are arranged at intervals in the second direction Y, one end of the first bending section 2321 is communicated with one end of the second bending section 2322, which is away from the third bending section 2323, the first bending section 2321 extends from the second bending section 2322 to a direction close to the fourth bending section 2324 along the second direction Y, one end of the fifth bending section 2325 is communicated with one end of the fourth bending section 2324, which is away from the third bending section 2323, and the fifth bending section 2325 extends from the fourth bending section 2324 to a direction close to the second bending section 2322 along the second direction Y. One first output 231 communicates with an end of the first bending section 2321 facing away from the second bending section 2322, and the other first output 231 communicates with an end of the fifth bending section 2325 facing away from the fourth bending section 2324.

The first connection portion 232 may include only a third bending portion 2323, where the third bending portion 2323 extends linearly along the second direction Y, so that the first connection portion 232 extends linearly, two ends of the third bending portion 2323 along the second direction Y are respectively communicated with the two first output portions 231, and the two first output portions 231 extend out of the housing 21 from two ends of the third bending portion 2323 in the second direction Y.

The second connection portion 242 may refer to the structure of the first connection portion 232, which is not described herein.

The first connection part 232 of the first tube 23 extends from the electrode assembly 22 at one end in the second direction Y to the electrode assembly 22 at the other end in the second direction Y, and the second connection part 242 of the second tube 24 extends from the electrode assembly 22 at one end in the second direction Y to the electrode assembly 22 at the other end in the second direction Y, so that both the first connection part 232 and the second connection part 242 can pass through each electrode assembly 22, increasing the coverage areas of the first tube 23 and the second tube 24, and improving the temperature regulating ability of the first tube 23 and the second tube 24 to the inside of the battery cell 20.

The first and second output parts 231 and 241 may extend from different directions to the outside of the case 21 such that the battery cell 20 has a structural configuration. For example, as shown in fig. 5, in some embodiments, both the first output 231 and the second output 241 extend outside the housing 21 along the second direction Y.

As shown in fig. 5, the first output part 231 and the second output part 241 each extend outside the case 21 in the second direction Y, i.e., in the embodiment in which the battery cell 20 includes the plurality of electrode assemblies 22, the direction in which the first output part 231 and the second output part 241 extend out of the case 21 coincides with the arrangement direction of the plurality of electrode assemblies 22. For some battery cells 20, the first direction X coincides with the length direction of the battery cell 20, and the second direction Y coincides with the height direction of the battery cell 20, and therefore, the plurality of electrode assemblies 22 are stacked in the height direction of the battery cell 20, and the directions in which the first output part 231 and the second output part 241 extend out of the case 21 coincide with the height direction of the battery cell 20.

Since the second direction Y coincides with the thickness direction of the electrode assembly 22, in an embodiment in which the battery cell 20 includes one electrode assembly 22, the first output part 231 and the second output part 241 may extend out of the case 21 in the thickness direction of the electrode assembly 22.

The first output part 231 and the second output part 241 extend to the outside of the housing 21 along the second direction Y, so that the size of the battery cell 20 in other directions can be reduced, and thus, the space occupied by the battery cell 20 in other directions is reduced, and the space placement of the battery cell 20 is facilitated.

As another example, as shown in fig. 6 and 7, in some embodiments, the first output portion 231 and the second output portion 241 extend along the third direction Z to the outside of the housing 21, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The first direction X coincides with the height direction of the electrode assembly 22, the second direction Y coincides with the thickness direction of the electrode assembly 22, and the third direction Z coincides with the width direction of the electrode assembly 22. The first and second output parts 231 and 241 extend from the third direction Z to the outside of the case 21, and it is understood that the first and second output parts 231 and 241 each extend along the width direction of the electrode assembly 22.

As shown in fig. 6 and 7, the first direction X corresponds to the width direction of the battery cell 20, the second direction Y corresponds to the length direction of the battery cell 20, and the third direction Z corresponds to the height direction of the battery cell 20 for the battery cell 20. Accordingly, it can be understood that the plurality of electrode assemblies 22 are stacked in the length direction of the battery cell 20, and the first output 231 and the second output 241 each extend outside the case 21 in the height direction of the battery cell 20.

The first output portion 231 and the second output portion 241 extend along the third direction Z to the outside of the housing 21, so as to avoid that the size of the battery cell 20 in a certain direction is too large to affect the spatial arrangement of the battery cell 20.

The first output 231 and the second output 241 may also extend from different positions of the housing 21 to the outside of the housing 21. Referring to fig. 7 and 8 in combination, in some embodiments, the battery cell 20 includes a housing 21 including a housing 211 and an end cap 212; the housing 211 has an opening 2111; the end cover 212 is used for sealing the opening 2111, and a through hole 2121 is arranged on the end cover 212; wherein the first and second output parts 231 and 241 extend from the through hole 2121 to the outside of the housing 21.

The end cap 212 is provided with a plurality of through holes 2121, and the first output portion 231 and the second output portion 241 extend from the different through holes 2121 to the outside of the housing 21, respectively. The first output parts 231 and the second output parts 241 are disposed in one-to-one correspondence. When the end cap 212 is covered on the opening 2111 of the housing 211, the first output portion 231 and the second output portion 241 can pass through the corresponding through holes 2121 to extend out of the casing 21.

In order to secure the sealability of the battery cell 20 and reduce the risk of an internal short circuit of the battery cell 20, the battery cell 20 further includes an insulating seal 210, the insulating seal 210 being used for insulating sealing between the first output 231 and the corresponding through hole 2121, and between the second output 241 and the corresponding through hole 2121.

Optionally, in some embodiments, a pressure relief mechanism 2122 and a fill hole 2123 are further provided on the end cap 212, the pressure relief mechanism 2122 being configured to actuate to relieve the pressure inside the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold.

Pressure relief mechanism 2122 refers to an element or component that actuates to relieve the internal pressure or temperature of battery cell 20 when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold value may depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator in the battery cell 20. The pressure relief mechanism 2122 may take the form of, for example, an explosion-proof valve, an explosion-proof sheet, a gas valve, a pressure relief valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e., when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 2122 performs an action or a weak structure provided in the pressure relief mechanism 2122 is broken, thereby forming an opening 2111 or a passage through which the internal pressure or temperature can be released.

As referred to herein, "actuated" refers to the pressure relief mechanism 2122 being actuated or activated to a state such that the internal pressure and temperature of the battery cell 20 is relieved. The action by pressure relief mechanism 2122 may include, but is not limited to: at least a portion of pressure relief mechanism 2122 breaks, tears, opens, etc. Upon actuation, the pressure relief mechanism 2122 causes the high temperature, high pressure material within the battery cell 20 to be expelled as an exhaust outwardly from the location of actuation. In this way, the pressure and temperature of the battery cells 20 can be relieved under controlled pressure or temperature conditions, thereby avoiding potentially more serious accidents.

The filling hole 2123 is used to fill the battery cell 20 with an electrolyte, such as an electrolyte.

In other embodiments, the first and second outputs 231, 241 may also extend from the wall of the housing 211 to the outside of the housing 21. The first output portion 231 and the second output portion 241 may extend from different structures of the housing 21 to the outside of the housing 21, for example, the first output portion 231 extends from the through hole 2121 on the end cap 212 to the outside of the housing 21, and the second output portion 241 extends from the wall of the housing 211 to the outside of the housing 21.

The first output part 231 and the second output part 241 extend from the through hole 2121 of the end cover 212 to the outside of the case 21, are sequentially adapted to the assembly process of the battery cell 20, facilitate the assembly of the battery cell 20, and do not reduce the structural strength of the housing 211.

As shown in fig. 9-11, the embodiment of the present application further provides a battery 100, where the battery 100 includes the battery cell 20 provided in any of the above embodiments.

The first tube 23 and the second tube 24 are provided in the case 21 of the battery cell 20, and can enhance the control capability of the internal temperature of the battery cell 20, thereby enhancing the control capability of the internal temperature of the battery 100. And, the first pipe 23 and the second pipe 24 respectively form the first output part 231 and the second output part 241 for outputting electric energy, that is, the first output part 231 and the second output part 241 have larger current carrying capacity, and heat generated when the first output part 231 and the second output part 241 overflow can be taken away through fluid media in the first pipe 23 and the second pipe 24, so that the whole temperature regulation of the battery cell 20 is realized, and the reliability and the safety performance of the battery 100 are further improved.

As shown in fig. 9, 10, in some embodiments, the battery 100 includes a plurality of battery cells 20; the first tubes 23 of the battery cells 20 are in communication with the second tubes 24, and the first tubes 23 of two adjacent battery cells 20 are in communication with said second tubes 24 to form a first series channel containing a fluid medium.

Since the first pipe 23 has a first inlet end 2311 for the fluid medium and a first outlet end 2312 for the fluid medium to leave. The second tube 24 has a second inlet end 2411 for the ingress of fluid medium and a second outlet end 2412 for the egress of fluid medium.

The first pipe 23 and the second pipe 24 of each battery cell 20 are in communication, and in order to ensure that the respective battery cells 20 of the battery 100 do not short-circuit, the first pipe 23 and the second pipe 24 of each battery cell 20 are in insulated communication, specifically, the first outlet end 2312 of the first pipe 23 and the second inlet end 2411 of the second pipe 24 of each battery cell 20 are in insulated communication. The first outlet end 2312 of the first pipe 23 of each battery cell 20 and the second inlet end 2411 of the second pipe 24 may be directly or indirectly connected.

The first inlet end 2311 of the first pipe 23 of one battery cell 20 and the second outlet end 2412 of the second pipe 24 of the other battery cell 20 of the adjacent two battery cells 20 are communicated, so that the first pipe 23 and the second pipe 24 of the plurality of battery cells 20 of the battery 100 are sequentially communicated to form a first serial channel, one end of the first serial channel is a medium inlet, the other end is a medium outlet, and a fluid medium enters the first serial channel from the medium inlet of the first serial channel and is discharged from the medium outlet of the first serial channel. The fluid medium can circulate in the first serial channels and sequentially flow through the first pipe 23 and the second pipe 24 of each battery cell 20, so that the temperature of each battery cell 20 is regulated, and the temperature regulation is convenient and quick.

The first inlet end 2311 of the first tube 23 of one of the adjacent two battery cells 20 and the second outlet end 2412 of the second tube 24 of the other battery cell 20 may be in direct communication, for example, the first inlet end 2311 of the first tube 23 of one of the adjacent two battery cells 20 and the second outlet end 2412 of the second tube 24 of the other battery cell 20 may be welded or plugged together directly to achieve direct communication.

Of course, the first inlet end 2311 of the first pipe 23 of one cell 20 and the second outlet end 2412 of the second pipe 24 of the other cell 20 of the adjacent two cells 20 may also be in indirect communication. As shown in fig. 9 and 10, in some embodiments, the battery 100 further includes a first communication pipe 30, and the first pipe 23 and the second pipe 24 of two adjacent battery cells 20 are communicated through the first communication pipe 30 to form a first serial channel.

The first inlet end 2311 of the first pipe 23 of one cell 20 and the second outlet end 2412 of the second pipe 24 of the other cell 20 of the adjacent two cells 20 are indirectly communicated through the first communication pipe 30 to form a first serial passage.

The first tubes 23 and the second tubes 24 of the adjacent two battery cells 20 are communicated through the first communication tube 30, so that the first tubes 23 and the second tubes 24 of the battery cells 20 are conveniently connected in series to form a first serial channel, thereby facilitating the assembly of the battery 100.

As shown in fig. 9, in some embodiments, the first communication tube 30 is an insulating tube; the battery 100 further includes a first conductive member 40, and the first output portion 231 and the second output portion 241 of two adjacent battery cells 20 are connected through the first conductive member 40, so as to realize the serial connection of the two adjacent battery cells 20.

The first conductive member 40 may be made of conductive materials such as copper and aluminum, which is not limited in the embodiment of the present application.

The first communication pipe 30 is an insulating pipe, and the first output portion 231 and the second output portion 241 of two adjacent battery cells 20 are connected through the first conductive member 40, so that the two adjacent battery cells 20 are connected in series, and the risk of internal short circuit of the battery cells 20 can be reduced.

In other embodiments, as shown in fig. 10, the first communication tube 30 is a conductive tube to realize the serial connection of two adjacent battery cells 20.

The first conductive member 40 is not required to be disposed between the adjacent battery cells 20. The first communication pipe 30 is a conductive pipe, and two adjacent battery monomers 20 are connected in series through the first communication pipe 30, so that fluid medium can circulate between the two adjacent battery monomers 20 through the first communication pipe 30, the two adjacent battery monomers 20 can be connected in series, the internal structure of the battery monomers 20 is reduced, and the assembly efficiency can be improved.

As shown in fig. 11, in some embodiments, battery 100 includes a plurality of battery cells 20; the first tubes 23 of the plurality of battery cells 20 are in communication in sequence to form a second series channel containing a fluid medium, and the second tubes 24 of the plurality of battery cells 20 are in communication in sequence to form a third series channel containing a fluid medium.

The first outlet end 2312 of the first pipe 23 of one cell 20 of the adjacent two cells 20 communicates with the first inlet end 2311 of the first pipe 23 of the other cell 20, so that the first pipes 23 of the plurality of cells 20 of the battery 100 communicate in sequence to form a second serial passage. One end of the second serial channel is a medium inlet, the other end of the second serial channel is a medium outlet, and fluid medium enters the second serial channel from the medium inlet of the second serial channel and is discharged from the medium outlet of the second serial channel. The second outlet end 2412 of the second tube 24 of one cell 20 of the adjacent two cells 20 communicates with the second inlet end 2411 of the second tube 24 of the other cell 20 such that the second tubes 24 of the plurality of cells 20 of the battery 100 communicate in sequence to form a third series channel. One end of the third serial channel is a medium inlet, the other end of the third serial channel is a medium outlet, and fluid medium enters the third serial channel from the medium inlet of the third serial channel and is discharged from the medium outlet of the third serial channel.

The first pipes 23 of the two adjacent battery monomers 20 are sequentially communicated to form a second serial channel, the second pipes 24 of the two adjacent battery monomers 20 are sequentially communicated to form a second serial channel, so that fluid medium can circulate in the second serial channel and the third serial channel, and the fluid medium sequentially flows through the first pipe 23 and the second pipe 24 of each battery monomer 20, so that the temperature of each battery monomer 20 is regulated, and the temperature regulation is convenient and quick.

The first tubes 23 in two adjacent battery cells 20 may be in direct communication or in indirect communication. The second tubes 24 in two adjacent cells 20 may be in direct communication or may be in indirect communication.

In some embodiments, battery 100 includes second communication tube 50 and third communication tube 60; of the adjacent two battery cells 20, the first pipe 23 of one battery cell 20 communicates with the first pipe 23 of the other battery cell 20 through the second communication pipe 50 to form a second serial passage, and the second pipe 24 of the one battery cell 20 communicates with the second pipe 24 of the other battery cell 20 through the third communication pipe 60 to form a third serial passage.

The first inlet end 2311 of the first pipe 23 of one battery cell 20 and the first outlet end 2312 of the first pipe 23 of the other battery cell 20 of the adjacent two battery cells 20 are indirectly connected through the second connection pipe 50 such that the first pipes 23 of the plurality of battery cells 20 of the battery 100 form a second series passage. The second inlet end 2411 of the second pipe 24 of one cell 20 and the second outlet end 2412 of the second pipe 24 of the other cell 20 of the adjacent two cells 20 are indirectly connected through the third connection pipe 60, so that the second pipes 24 of the plurality of cells 20 of the battery 100 form a third serial channel.

The first pipes 23 of the adjacent two battery cells 20 are communicated through the second communicating pipe 50, so that the first pipes 23 of the battery cells 20 are conveniently connected in series to form a second serial channel, the second pipes 24 of the adjacent two battery cells 20 are communicated through the third communicating pipe 60, so that the second pipes 24 of the battery cells 20 are conveniently connected in series to form a third serial channel, and the battery 100 is conveniently assembled.

In some embodiments, the second communication tube 50 and the third communication tube 60 are both conductive tubes to achieve parallel connection of two adjacent battery cells 20.

No other conductive members are required between the adjacent two battery cells 20. The second communicating pipe 50 and the third communicating pipe 60 are conductive pipes, two adjacent battery cells 20 are connected in series through the second communicating pipe 50 and the third communicating pipe 60, and the second communicating pipe 50 and the third communicating pipe can enable fluid media to circulate between the two adjacent battery cells 20, can also enable the two adjacent battery cells 20 to be connected in parallel, reduce the internal structure of the battery cells 20, and can improve assembly efficiency.

In other embodiments, the second and third communication tubes 50, 60 are each insulated tubes; the battery 100 further includes a second conductive member (not shown) and a third conductive member (not shown), wherein the first output portion 231 of one battery cell 20 is connected with the first output portion 231 of the other battery cell 20 through the second conductive member, and the second output portion 241 of the one battery cell 20 is connected with the second output portion 241 of the other battery cell 20 through the third conductive member, so as to realize parallel connection of the two adjacent battery cells 20.

The second conductive member and the third conductive member may be made of conductive materials such as aluminum and copper, which are not limited in the embodiment of the present application.

The second communication pipe 50 and the third communication pipe 60 are insulating pipes, the first output parts 231 of two adjacent battery cells 20 are connected through the second conductive member, and the second output parts 241 of two adjacent battery cells 20 are connected through the third conductive member, so that the two adjacent battery cells 20 are connected in parallel, and the risk of internal short circuit of the battery cells 20 can be reduced.

The present embodiment provides a square-case battery including a case 21, a plurality of electrode assemblies 22, a first tube 23, and a second tube 24. The electrode assembly 22 has a positive tab 221 and a negative tab 222, the electrode assembly 22 has a first end 223 and a second end 224 opposite in the first direction X, the positive tab 221 is disposed at the first end 223, and the negative tab 222 is disposed at the second end 224. The plurality of electrode assemblies 22 are sequentially arranged in the second direction Y. At least a portion of the first tube 23 is positioned at the first end 223 and extends from one end of the plurality of electrode assemblies 22 positioned in the second direction Y to the electrode assembly 22 positioned at the other end in the second direction Y, and the first tube 23 is connected to the positive electrode tab 221 of each electrode assembly 22. At least a portion of the second tube 24 is positioned at the second end 224 and extends from one end of the plurality of electrode assemblies 22 positioned in the second direction Y to the electrode assembly 22 positioned at the other end in the second direction Y, and the second tube 24 is connected to the negative tab 222 of each electrode assembly 22. The first tube 23 has two first output parts 231 extending to the outside of the case 21, and the second tube 24 has two second output parts 241 extending to the outside of the case 21, and the two first output parts 231 and the two second output parts 241 are used to output electric power of the square-case battery. The first pipe 23 has a first inlet end 2311 for medium to enter the first pipe 23 and a first outlet end 2312 for medium to exit the first pipe 23, and fluid medium enters the first pipe 23 from the first inlet end 2311 and exits the first pipe 23 from the first outlet end 2312. The second tube 24 has a second inlet end 2411 for media to enter the second tube 24 and a second outlet end 2412 for media to exit the first tube 23, with fluid media entering the second tube 24 from the second inlet end 2411 and exiting the second tube 24 from the second outlet end 2412. The first pipe 23 and the second pipe 24 are internally provided with fluid medium flowing, so that the heat inside the square-shell battery can be regulated, and the heat generated by the two first output parts 231 and the two second output parts 241 in the charging and discharging process of the square-shell battery can be taken away, thereby realizing the whole temperature regulation of the square-shell battery, enhancing the temperature control capability of the square-shell battery, and further improving the reliability and safety performance of the square-shell battery.

The embodiment of the application also provides electric equipment, which comprises the battery 100 provided by any embodiment, and the battery 100 is used for providing electric energy.

The electric equipment provides electric energy through the battery 100 provided by any embodiment, and the temperature inside the battery 100 can be effectively regulated, so that the power supply reliability of the battery 100 is ensured, and the electricity utilization safety is improved.

As shown in fig. 12, the embodiment of the present application further provides a manufacturing apparatus 2000 of a battery cell, the manufacturing apparatus 2000 of a battery cell including a providing device 2100 and an assembling device 2200; the providing device 2100 is for providing a case 21, an electrode assembly 22, a first tube 23 and a second tube 24, the electrode assembly 22 having a positive tab 221 and a negative tab 222, the first tube 23 and the second tube 24 each being for containing a fluid medium; the assembling device 2200 is configured to dispose the electrode assembly 22 within the case 21, dispose the first tube 23 within the case 21 and connect with the positive electrode tab 221 such that the first tube 23 has a first output portion 231 extending at least partially outside the case 21, and dispose the second tube 24 within the case 21 and connect with the negative electrode tab 222 such that the first tube 23 has a second output portion 241 extending at least partially outside the case 21; the first output unit 231 and the second output unit 241 have opposite polarities and are configured to output electric energy of the battery cell 20.

As shown in fig. 13, the embodiment of the present application further provides a manufacturing method of a battery cell 20, where the manufacturing method of the battery cell 20 includes:

s100, providing a case 21, an electrode assembly 22, a first tube 23 and a second tube 24, the electrode assembly 22 having a positive tab 221 and a negative tab 222, the first tube 23 and the second tube 24 each for accommodating a fluid medium;

s200, disposing the electrode assembly 22 inside the case 21;

s300, disposing the first tube 23 inside the housing 21 and connecting with the positive electrode tab 221, such that the first tube 23 has a first output portion 231 extending at least partially outside the housing 21;

s400, disposing the second tube 24 inside the housing 21 and connecting with the negative electrode tab 222, such that the first tube 23 has a second output portion 241 extending at least partially outside the housing 21;

the first output unit 231 and the second output unit 241 have opposite polarities and are configured to output electric energy of the battery cell 20.

In S200, S300 and S400, the first tube 23 may be connected to the positive electrode tab 221 and the second tube 24 may be connected to the negative electrode tab 222, so that the first tube 23, the second tube 24 and the electrode assembly 22 are disposed in the case 21 as a whole.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery cell, comprising:

a housing;

an electrode assembly received in the case, the electrode assembly having a positive electrode tab and a negative electrode tab;

a first tube disposed within the housing and connected to the positive electrode tab, the first tube for containing a fluid medium, the first tube having a first output portion extending at least partially out of the housing; and

a second tube disposed within the housing and connected to the negative tab, the second tube for containing a fluid medium, the second tube having a second output portion extending at least partially out of the housing;

the first output part and the second output part are used for outputting the electric energy of the battery unit.

2. The battery cell of claim 1, wherein the electrode assembly has a first end and a second end disposed opposite in a first direction, the positive tab being disposed at the first end and the negative tab being disposed at the second end;

the first tube is at least partially located at the first end and connected with the positive electrode tab, and the second tube is at least partially located at the second end and connected with the negative electrode tab.

3. The battery cell according to claim 1, wherein the first tube includes a first connection portion and two first output portions, the two first output portions being communicated through the first connection portion, the positive electrode tab being connected to the first connection portion;

the second pipe comprises a second connecting part and two second output parts, the two second output parts are communicated through the second connecting part, and the negative electrode lug of the electrode assembly is connected with the second connecting part.

4. The battery cell of claim 3, wherein the first tube has a first inlet end into which the fluid medium flows and a first outlet end from which the fluid medium flows, the first inlet end and the first outlet end being disposed on the two first output portions, respectively;

the second pipe is provided with a second inlet end for the inflow of the fluid medium and a second outlet end for the outflow of the fluid medium, and the second inlet end and the second outlet end are respectively arranged on the two output parts.

5. The battery cell according to claim 3 or 4, wherein the battery cell comprises a plurality of electrode assemblies stacked in a second direction, the positive electrode tab and the negative electrode tab being disposed at opposite ends of the electrode assemblies in a first direction, the second direction being perpendicular to the first direction;

The positive electrode lugs of each electrode assembly are connected with the first pipe, and the negative electrode lugs of each electrode assembly are connected with the second pipe.

6. The battery cell according to claim 5, wherein the first connection portion extends at least partially from an electrode assembly located at one end in the second direction to an electrode assembly located at the other end in the second direction among the plurality of electrode assemblies;

the second connection part extends at least partially from an electrode assembly located at one end in the second direction to an electrode assembly located at the other end in the second direction among the plurality of electrode assemblies.

7. The battery cell of claim 5, wherein the first output and the second output each extend in the second direction out of the housing.

8. The battery cell of claim 5, wherein the first output and the second output each extend out of the housing in a third direction, the first direction, the second direction, and the third direction being perpendicular to each other.

9. The battery cell of claim 1, wherein the housing comprises:

A housing having an opening;

the end cover is used for sealing the opening and is provided with a through hole;

wherein the first and second output portions extend from the through hole to outside the housing.

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

11. The battery of claim 10, wherein the battery comprises a plurality of battery cells;

the first tube of each cell communicates with the second tube, and the first tubes of adjacent two cells communicate with the second tube to form a first series channel containing a fluid medium.

12. The battery of claim 11, further comprising a first communication tube through which the first tubes of two adjacent battery cells communicate with the second tube to form the first series channel.

13. The battery of claim 12, wherein the first communication tube is an insulating tube;

the battery also comprises a first conductive piece, wherein the first output parts and the second output parts of two adjacent battery monomers are connected through the first conductive piece so as to realize the serial connection of the two adjacent battery monomers.

14. The battery of claim 12, wherein the first communication tube is a conductive tube to enable the two adjacent cells to be connected in series.

15. The battery of claim 10, wherein the battery comprises a plurality of battery cells;

the first tubes of the plurality of battery cells are in communication in sequence to form a second series channel containing a fluid medium, and the second tubes of the plurality of battery cells are in communication in sequence to form a third series channel containing a fluid medium.

16. The battery according to claim 15, wherein the battery includes a second communication pipe and a third communication pipe;

the first pipe of one battery cell is communicated with the first pipe of the other battery cell through the second communicating pipe to form the second serial passage, and the second pipe of the one battery cell is communicated with the second pipe of the other battery cell through the third communicating pipe to form the third serial passage.

17. The battery according to claim 16, wherein the second communication pipe and the third communication pipe are both conductive pipes to realize parallel connection of the adjacent two battery cells.

18. The battery according to claim 16, wherein the second communication pipe and the third communication pipe are both insulating pipes;

the battery also comprises a second conductive piece and a third conductive piece, wherein the first output part of one battery monomer is connected with the first output part of the other battery monomer through the second conductive piece, and the second output part of the one battery monomer is connected with the second output part of the other battery monomer through the third conductive piece, so that the two adjacent battery monomers are connected in parallel.

19. A powered device comprising a battery according to any of claims 10-18, said battery being adapted to provide electrical energy.

20. A manufacturing apparatus of a battery cell, characterized by comprising:

providing means for providing a housing, an electrode assembly having a positive tab and a negative tab, a first tube and a second tube, each for containing a fluid medium;

an assembly device configured to dispose an electrode assembly within the housing, dispose the first tube within the housing and connect with the positive electrode tab such that the first tube has a first output portion extending at least partially outside the housing, and dispose the second tube within the housing and connect with the negative electrode tab such that the first tube has a second output portion extending at least partially outside the housing;

21. A method for manufacturing a battery cell, comprising:

disposing the electrode assembly within the housing;