CN221508278U

CN221508278U - Battery cell, battery and power-consuming device

Info

Publication number: CN221508278U
Application number: CN202421030102.3U
Authority: CN
Inventors: 董俊君; 张继君; 茶兴贵; 王少飞; 魏奕民
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-05-13
Filing date: 2024-05-13
Publication date: 2024-08-09
Anticipated expiration: 2034-05-13
Also published as: WO2025236436A1

Abstract

The application discloses a battery monomer, a battery and an electric device. The battery monomer provided by the application comprises a shell, a detection element and a transmission element, wherein the shell comprises a wall part; the detection element comprises a mounting shell and a sensor, wherein the mounting shell penetrates through the wall part, the sensor is mounted in the mounting shell, and the sensor is used for acquiring battery data; the transmission element is located outside the shell, and the transmission element is connected with the detection element, and the transmission element is used for receiving and transmitting battery data. From this, detecting element wears to locate wall portion, and detecting element exposes in the inside detecting element that can be convenient for of shell gathers battery data, and detecting element also exposes in the outside detecting element that can be convenient for of shell simultaneously and is connected with transmission element to the battery data that the transmission element will detect the acquisition is transmitted to the transmission element of being convenient for. Compared with other types of battery cells, the battery cell disclosed by the application has a simple structure, and is more convenient for transmitting battery data.

Description

Battery monomer, battery and power utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer, a battery and an electric device.

Background

Energy conservation and emission reduction are key to sustainable development, so that the adjustment of an energy structure is promoted, and the development and application of a battery technology are promoted. The development of battery technology is critical to electrochemical energy storage technology, which has been widely used in portable electronic, electric vehicles and energy storage systems due to its advantages of high energy density, good cycling ability, high operating voltage, environmental protection, low self-discharge, etc.

The battery needs to collect and monitor the working state of the battery through the detection element in the use process, however, the detection element of the existing battery has complex structure, poor reliability and difficulty in transmitting the collected battery data.

Disclosure of utility model

The application aims to provide a battery cell, a battery and an electricity utilization device, and aims to solve the technical problems in the prior art.

In order to solve the above problems, the present application provides a battery cell including a housing, a detection element, and a transmission element, the housing including a wall portion; the detection element comprises a mounting shell and a sensor, wherein the mounting shell penetrates through the wall part, the sensor is mounted in the mounting shell, and the sensor is used for acquiring battery data; the transmission element is located outside the shell, and the transmission element is connected with the detection element, and the transmission element is used for receiving and transmitting battery data. From this, install the sensor to the installation shell in, the accessible installation shell plays better guard action to the sensor to detecting element accessible installation shell wears to locate wall, improves detecting element installation's stability, and detecting element still exposes simultaneously in the shell outside and can be convenient for detecting element and transmission element be connected, thereby is convenient for transmission element transmits the battery data that detecting element gathered.

In some embodiments, the battery cell further includes a post disposed on the wall, and the detection element and the transmission element are each electrically connected to the post. Therefore, the detection element and the transmission element can be powered through the pole, external power supply is not needed, and the complexity of a power supply mode is reduced.

In some embodiments, the battery cell further includes a lead, the transmission element is electrically connected to the post via the lead, and the transmission element is electrically connected to the detection element. Therefore, the pole can supply power to the transmission element through the lead wire and supply power to the detection element through the transmission element, so that the complexity of the wire harness can be reduced.

In some embodiments, the pole comprises a first pole and a second pole of opposite polarity, the first pole and the second pole are spaced apart, the wire comprises a first wire and a second wire, the first wire connects the transmission element and the first pole, and the second wire connects the transmission element and the second pole. Therefore, the first pole and the second pole are convenient to supply power for the transmission element through the first lead and the second lead, and the complexity of the wire harness is reduced.

In some embodiments, the detection element and the transmission element are located between the first pole and the second pole. Therefore, the extension length of the first wire and the second wire can be reduced, the production cost is saved, and the complexity of the wire harness is reduced.

In some embodiments, the height of the detection element protruding from the wall outside the housing is lower than the height of the pole protruding from the wall outside the housing. From this, be convenient for reduce the whole size of battery monomer, reduce the influence that detecting element caused at battery monomer and other part interact for the single adaptable of battery is suitable for more application scenario.

In some embodiments, the detection element comprises a conductive member connected to a side of the mounting housing facing the outside of the housing, and the transmission element is connected to the conductive member. Therefore, the detection element can be electrically connected with the transmission element through the conductive piece, and the stability of connection between the detection element and the transmission element is improved.

In some embodiments, the mounting shell has a receiving slot with a slot opening facing the interior of the housing, the sensor is located in the receiving slot, and the sensing element further includes a diaphragm that blocks the slot opening of the receiving slot. From this, accommodation groove and diaphragm cooperation can provide the support for the sensor, and accessible accommodation groove and diaphragm play the guard action to the sensor simultaneously, have reduced the risk of sensor damage.

In some embodiments, the sensor comprises a temperature sensor and/or a pressure sensor. Thus, temperature and/or pressure data of the battery cells can be detected by the sensor.

In some embodiments, the mounting shell includes a main body portion and a first flange portion, the main body portion is disposed through the wall portion, the first flange portion is located outside the housing and connected to the main body portion, the first flange portion is disposed at an interval from the wall portion, the battery cell further includes a buckle element, a radial dimension of the first flange portion is greater than a radial dimension of the main body portion, and the buckle element is disposed between the first flange portion and the wall portion. Therefore, the first flange part can be clamped on the wall part through the clamping piece, so that the main body part can be conveniently penetrated on the wall part, the main body part and the wall part can be conveniently detached, and the stability of the installation and fixation of the main body part and the wall part is improved.

In some embodiments, the mounting shell includes a second flange portion positioned inside the housing and connected to the body portion, the second flange portion having a radial dimension greater than a radial dimension of the body portion, the second flange portion abutting the wall portion. Therefore, the second flange part can be clamped on one side of the wall part, which is close to the inside of the shell, so that the stability of the installation and fixation of the main body part and the wall part is further improved.

In some embodiments, the battery cell further includes a seal ring disposed around the body portion, the seal ring sandwiched between the wall portion and the second flange portion. Therefore, the wall part and the second flange part can be sealed through the sealing ring, and the internal environment of the battery cell is isolated from the external environment.

In some embodiments, the housing includes a shell and an end cap, the end cap is disposed at an open end of the shell, and the detection element is disposed through the end cap. Therefore, the end cover can be matched with the shell to isolate the internal environment of the battery cell from the external environment, and meanwhile, the detection element is arranged on the end cover in a penetrating mode, so that the detection element can be conveniently installed and fixed and the like.

In some embodiments, the end cap is provided with a liquid injection hole, and the liquid injection hole is spaced from the detection element. Therefore, electrolyte can be injected into the battery monomer through the electrolyte injection hole, so that the electrolyte can be conveniently supplemented into the shell.

In order to solve the problems, the application provides a battery, which comprises the battery cell.

In some embodiments, the battery includes a battery management system in communication with the transmission element. Therefore, the control signals can be provided for the transmission element and the detection element through the battery management system, so that the detection element can conveniently detect the state of the battery unit, and the working state of the battery unit can be conveniently and pertinently managed according to the battery data transmitted by the transmission element.

In order to solve the problems, the application also provides an electric device which comprises the battery.

Drawings

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

FIG. 1 is a schematic structural view of a vehicle according to one or more embodiments of the application;

fig. 2 is an exploded view of a battery according to one or more embodiments of the present application;

Fig. 3 is an exploded structural schematic view of a battery cell according to one or more embodiments of the present application;

Fig. 4 is a partial structural schematic view of a first view of a battery cell according to one or more embodiments of the present application;

fig. 5 is a partial structural schematic view of a second view of a battery cell according to one or more embodiments of the present application;

Fig. 6 is a partial structural schematic view of a third view of a battery cell according to one or more embodiments of the present application;

Fig. 7 is a sectional view of a partial structure of the battery cell shown in fig. 4, taken along the A-A direction;

FIG. 8 is an enlarged schematic view of the structure within the dashed box in the cross-sectional view of FIG. 7;

fig. 9 is a schematic structural view of a battery according to one or more embodiments of the present application.

Reference numerals: a vehicle 1; a battery 2; a controller 3; a motor 4; a case 20; a first portion 21; a second portion 22; a battery cell 10; a housing 100; a wall portion 110; a housing 120; an end cap 130; a detection element 200; a mounting case 210; the accommodating groove 211; a main body 212; a first flange portion 213; a second flange portion 214; a sensor 220; a conductive member 230; a diaphragm 240; a transmission element 300; a pole 400; a first pole 410; a second post 420; a wire 500; a first wire 510; a second wire 520; a clip 600; a seal ring 700; a liquid injection hole 800; battery management system 900.

Detailed Description

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply 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 embodiments of the present application.

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

Currently, the more widely the battery is used in view of the development of market situation. The 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, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. Disposable batteries (Primary batteries) are also known as "disposable" batteries and galvanic cells, because they cannot be recharged for use after their charge has been exhausted and can only be discarded. Rechargeable batteries are also known as secondary (Secondary Battery) or secondary batteries, accumulators. The rechargeable battery is made of different materials and process from the primary battery, and has the advantages of being capable of being recycled for multiple times after being charged, and the output current load force of the rechargeable battery is higher than that of most of the primary batteries. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. The lithium ion battery has the advantages of light weight, large capacity (the capacity is 1.5-2 times of that of the nickel-hydrogen battery with the same weight), no memory effect and the like, and has very low self-discharge rate, so that the lithium ion battery is widely applied even though the price is relatively high. Lithium ion batteries are also widely used in pure electric vehicles and hybrid vehicles at present, and the capacity of the lithium ion batteries used for the purposes is relatively slightly low, but the lithium ion batteries have larger output and charging currents, longer service lives and higher cost.

The battery described in the embodiments of the present application refers to a rechargeable battery or a disposable battery. Hereinafter, embodiments of the present disclosure will be described mainly by taking a lithium ion battery as an example. It should be appreciated that the disclosed embodiments are applicable to any other suitable type of rechargeable battery. The batteries according to the embodiments disclosed in the present application may be directly or indirectly used in a suitable device to power the device.

The application provides an electric device which can comprise, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like. The power utilization device can comprise a battery, and the power utilization device can provide electric energy through the battery to realize corresponding functions.

The application also provides an electric vehicle, which may include a battery.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

The vehicle 1 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-extending vehicle. The interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1. The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the application, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

In order to improve the performance of the electric device, the application also provides a battery, and referring to fig. 2, fig. 2 is a schematic diagram of an exploded structure of the battery according to one or more embodiments of the application.

The shape of the battery 2 may include, but is not limited to, a square cylinder shape or any other shape.

In some embodiments, the battery 2 may include a case 20 and a battery cell 10, the battery cell 10 being housed within the case 20. The case 20 is used to provide an accommodating space for the battery cell 10, and the case 20 may take various structures. In some embodiments, the case 20 may include a first portion 21 and a second portion 22, the first portion 21 and the second portion 22 being overlapped with each other, the first portion 21 and the second portion 22 together defining an accommodating space for accommodating the battery cell 10. The second portion 22 may be a hollow structure with one end opened, the first portion 21 may be a plate-shaped structure, and the first portion 21 covers the opening side of the second portion 22, so that the first portion 21 and the second portion 22 together define an accommodating space; the first portion 21 and the second portion 22 may be hollow structures each having an opening at one side, and the opening side of the first portion 21 is engaged with the opening side of the second portion 22.

In the battery 2, the number of the battery cells 10 may be plural, and the plural battery cells 10 may be connected in series or parallel or in series-parallel, and the series-parallel refers to that the plural battery cells 10 are connected in series or parallel. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 10 is accommodated in the box body 20; of course, the battery 2 may be a battery module formed by connecting a plurality of battery cells 10 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 20. The battery 2 may also include other structures, for example, the battery 2 may also include a bus member for making electrical connection between the plurality of battery cells 10.

The manufacturing modes of the battery cell 10 include lamination type and winding type, namely, the battery cell 10 is divided into lamination type batteries and winding type batteries. The laminated battery has uniform current collecting effect, smaller internal resistance and large specific power, but in order to improve the precision, the requirement on the precision of the die is extremely high, the equipment investment is high, the process is complex, and the production efficiency is low. The coiled battery is simple to manufacture, the requirements of the flaking and assembling processes on equipment precision are common, the production efficiency is high, and the cost is low. In terms of performance, the coiled battery has excellent high-low temperature performance, is very rapid to charge, has an ultra-long service life, is stable in high output voltage, and is firm in structure and strong in shock resistance.

Referring to fig. 3, fig. 3 is a schematic view illustrating an exploded structure of a battery cell according to one or more embodiments of the present application.

The battery cell 10 refers to the smallest unit constituting the battery 2. The battery cell 10 may include a housing 100, an electrode assembly, and other functional components, the housing 100 including an end cap 130 and a case 120.

The end cap 130 refers to a member that is covered at the opening of the case 120 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap 130 may be adapted to the shape of the housing 120 to fit the housing 120. Optionally, the end cover 130 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 130 is not easy to deform when being extruded and collided, so that the battery cell 10 can have higher structural strength, and the safety performance can be improved. The cap 130 may be provided with functional parts such as electrode terminals and the like. The electrode terminals may be used to be electrically connected with the electrode assembly for outputting or inputting electric power of the battery cell 10. In some embodiments, the electrode terminal may include a post. The poles may include positive and negative poles for output of current and connection to external circuitry. In some embodiments, an explosion proof member for venting the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold may also be provided on the end cap 130. The material of the end cap 130 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of end cap 130, which may be used to isolate electrical connection components within housing 120 from end cap 130 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The case 120 is an assembly for mating with the end cap 130 to form an internal environment of the battery cell 10, wherein the formed internal environment may be used to house the electrode assembly, electrolyte, and other components. The case 120 and the end cap 130 may be separate components, and an opening may be provided in the case 120, and the interior environment of the battery cell 10 may be formed by covering the opening with the end cap 130 at the opening. It is also possible to integrate the end cap 130 and the housing 120, specifically, the end cap 130 and the housing 120 may form a common connection surface before other components are put into the housing, and when the interior of the housing 120 needs to be sealed, the end cap 130 is then covered with the housing 120. The housing 120 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 120 may be determined according to the specific shape and size of the electrode assembly. The material of the housing 120 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The electrode assembly is a component in which electrochemical reactions occur in the battery cell 10. The case 120 may contain one or more electrode assemblies therein. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet having the active material constitute the main body portion of the electrode assembly, and the portions of the positive electrode sheet and the negative electrode sheet having no active material constitute the tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the electrode terminal to form a current loop.

In some embodiments, the electrode assembly includes a positive electrode, a negative electrode, and a separator. During charge and discharge of the battery cell 10, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode active material is provided on either or both of the two surfaces opposing the positive electrode current collector.

As an example, the positive electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of the lithium-containing phosphate may include, but are not limited to, at least one of lithium iron phosphate, a composite of lithium iron phosphate and carbon, lithium manganese phosphate, a composite of lithium manganese phosphate and carbon. Examples of the lithium transition metal oxide may include, but are not limited to, at least one of lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt aluminum oxide, modified compounds thereof, and the like.

In some embodiments, the negative electrode may be a negative electrode tab, which may include a negative electrode current collector.

As an example, the negative electrode current collector may employ a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, foam carbon or the like. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

As an example, the anode current collector has two surfaces opposing in its own thickness direction, and the anode active material is provided on either or both of the two surfaces opposing the anode current collector.

As an example, a negative active material known in the art for the battery cell 10 may be used. As an example, the anode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, and the like. The silicon-based material may be at least one selected from elemental silicon, silicon oxygen compounds, silicon carbon composites, silicon nitrogen composites, and silicon alloys. The tin-based material may be at least one selected from elemental tin, tin oxide, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery anode active material may be used. These negative electrode active materials may be used alone or in combination of two or more.

In some embodiments, the material of the positive electrode current collector may be aluminum and the material of the negative electrode current collector may be copper.

In some embodiments, the separator is a separator film. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability can be used.

As an example, the main material of the separator may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator may be a single-layer film or a multilayer composite film, and is not particularly limited. When the separator is a multilayer composite film, the materials of the respective layers may be the same or different, and are not particularly limited. The separator may be a single member located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes.

In some embodiments, the separator is a solid state electrolyte. The solid electrolyte is arranged between the anode and the cathode and plays roles in transmitting ions and isolating the anode and the cathode.

In some embodiments, the battery cell 10 further includes an electrolyte that serves to conduct ions between the positive and negative electrodes. The application is not particularly limited in the kind of electrolyte, and may be selected according to the need. The electrolyte may be liquid, gel or solid.

Wherein the liquid electrolyte comprises an electrolyte salt and a solvent.

In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis-fluorosulfonyl imide, lithium bis-trifluoromethanesulfonyl imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalato borate, lithium difluorodioxaato phosphate, and lithium tetrafluorooxalato phosphate.

In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methylethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1, 4-butyrolactone, sulfolane, dimethyl sulfone, methyl sulfone, and diethyl sulfone. The solvent may also be selected from ether solvents. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1, 3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether.

The gel electrolyte comprises a skeleton network taking a polymer as an electrolyte and is matched with ionic liquid-lithium salt.

Wherein the solid electrolyte comprises a polymer solid electrolyte, an inorganic solid electrolyte and a composite solid electrolyte.

As examples, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single ion polymer, polyion liquid-lithium salt, cellulose, or the like.

As an example, the inorganic solid electrolyte may be one or more of an oxide solid electrolyte (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), a sulfide solid electrolyte (crystalline lithium super ion conductor (lithium germanium phosphorus sulfide, silver sulfur germanium mine), amorphous sulfide), and a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

The battery needs to collect and monitor the working state of the battery through the detection element in the use process, however, the detection element of the existing battery is complex in structure, poor in reliability and difficult to transmit collected battery data.

Referring to fig. 4, fig. 4 is a partial structure diagram of a first view of a battery cell according to one or more embodiments of the present application.

The battery cell 10 includes a housing 100, a detection element 200, and a transmission element 300, the housing 100 including a wall portion 110; the detecting element 200 penetrates through the wall portion 110, the detecting element 200 is exposed inside the casing 100 and outside the casing 100, and the detecting element 200 is used for collecting battery data; the transmission element 300 is located outside the housing 100, the transmission element 300 is connected to the detection element 200, and the transmission element 300 is used for receiving and transmitting battery data.

The housing 100 may act as a carrier for the sensing element 200 and the transmitting element 300 such that the sensing element 200 and the transmitting element 300 remain relatively fixed to the housing 100, either directly or indirectly. The housing 100 may isolate the internal environment of the battery cell 10 from the external environment, and the housing 100 may have a certain hardness and strength, so that the housing 100 is not easy to deform when being extruded and collided, and the safety performance of the battery cell 10 is improved. The case 100 may have any shape, for example, the shape of the case 100 includes, but is not limited to, square, cylindrical, prismatic, etc., the case 100 may have an internal hollow structure, and the inside of the case 100 may be used to accommodate an electrode assembly, an electrolyte, etc. The housing 100 includes a wall portion 110, and the wall portion 110 may be any side wall of the housing 100, for example, when the housing 100 is square, the portions corresponding to six sides of the square housing 100 may be used as the wall portion 110 in this embodiment.

The detection element 200 may be a device for collecting battery data of the battery cell 10, i.e., a device capable of receiving the battery data on the battery cell 10 and having functions of storing and processing the battery data. The battery data includes status signals, wherein the status signals refer to status information presented on the battery cells 10, such as temperature signals, voltage signals, pressure signals, etc. on the battery cells 10. The detection element 200 may detect one or more of a variety of status signals of the battery cell 10. The detecting element 200 is disposed through the wall 110, and the detecting element 200 may be at least partially exposed inside the housing 100, so as to facilitate detection and collection of a status signal inside the battery cell 10, and the detecting element 200 may be at least partially exposed outside the housing 100, so as to facilitate connection between the detecting element 200 and the transmitting element 300, where the transmitting element 300 is located outside the housing 100.

The transmission element 300 may receive the battery data detected by the detection element 200 and may transmit the detected battery data, and the transmission element 300 may include, but is not limited to, a wireless transmission module, where when the transmission element 300 is a wireless transmission module, the transmission element 300 may transmit the battery data by adopting a power carrier transmission manner or the like. In some application scenarios, the transmission element 300 may transmit battery data into the battery management system, and for example, the battery cell 10 may be connected to the battery management system through a dc bus, and the transmission element 300 may couple the signal of the battery data received from the detection element 200 into the current of the battery cell, and further transmit the signal into the battery management system through the dc bus.

Through the above embodiment, the detecting element 200 is disposed through the wall 110, and the detecting element 200 is exposed inside the housing 100 to facilitate the detecting element 200 to collect battery data, and the detecting element 200 is exposed outside the housing 100 to facilitate the detecting element 200 to be connected with the transmitting element 300, so that the transmitting element 300 is convenient for transmitting the battery data collected by the detecting element 200.

Referring to fig. 5-8, fig. 5 is a partial schematic structural view of a second view of a battery cell according to one or more embodiments of the present application; fig. 6 is a partial structural schematic view of a third view of a battery cell according to one or more embodiments of the present application; fig. 7 is a sectional view of a partial structure of the battery cell shown in fig. 4, taken along the A-A direction; fig. 8 is an enlarged schematic view of the structure within the dashed box in the cross-sectional view shown in fig. 7.

The battery cell 10 further includes a post 400 disposed on the wall 110, and the detecting element 200 and the transmitting element 300 are electrically connected to the post 400. The electrode post 400 may include two electrode posts 400 having opposite polarities, and the electrode post 400 may be an anode electrode post 400 and a cathode electrode post 400, for example, and the detection element 200 and the transmission element 300 may be electrically connected to the anode electrode post 400 and the cathode electrode post 400. The battery cell 10 may supply power to the sensing element 200 and the transmitting element 300 through the post 400. In some application scenarios, the transmission element 300 may further signal-couple the current of the cell of the battery cell 10 through the pole 400, so as to facilitate the transmission of the battery data by the transmission element 300. Therefore, the detection element 200 and the transmission element 300 can be powered by the pole 400, external power supply is not needed, and the complexity of a power supply mode is reduced.

In some embodiments, the battery cell 10 further includes a lead 500, the transmission element 300 is electrically connected to the post 400 through the lead 500, and the transmission element 300 is electrically connected to the detection element 200. The wire 500 may facilitate electrical communication between the transmission element 300 and the pole 400, thereby facilitating the pole 400 to provide power to the transmission element 300 through the wire 500. The transmission element 300 is electrically connected to the detection element 200, and it is understood that the transmission element 300 is electrically connected to the pole 400 through the wire 500, and the transmission element 300 is electrically connected to the detection element 200, so that the pole 400 can supply power to the detection element 200 through the wire 500 and the transmission element 300. Thus, the pole 400 can supply power to the transmission element 300 through the wire 500 and to the detection element 200 through the transmission element 300, so that the complexity of the wire harness can be reduced.

In some embodiments, the pole 400 includes a first pole 410 and a second pole 420 with opposite polarities, the first pole 410 and the second pole 420 are spaced apart, the wire 500 includes a first wire 510 and a second wire 520, the first wire 510 connects the transmission element 300 and the first pole 410, and the second wire 520 connects the transmission element 300 and the second pole 420. The first pole 410 may be any one of the positive pole 400 and the negative pole 400, and the second pole 420 is the other one of the positive pole 400 and the negative pole 400, and when the first pole 410 is the positive pole 400, the second pole 420 may be the negative pole 400, for example; or when the first electrode tab 410 is the negative electrode tab 400, the second electrode tab 420 may be the positive electrode tab 400. Thereby, the first and second poles 410 and 420 are facilitated to supply power to the transmission element 300 through the first and second wires 510 and 520, reducing complexity of the wire harness, etc.

In some embodiments, the detection element 200 and the transmission element 300 are located between the first pole 410 and the second pole 420. Illustratively, the first and second posts 410, 420 may be positive and negative posts 400, respectively, and one or both of the detection element 200 and the transmission element 300 may be closer to the positive post 400; or one or both of the detection element 200 and the transmission element 300 may be closer to the anode post 400; or the geometric centers of one or both of the sensing element 200 and the transmitting element 300 may also be located at the midpoint between the positive and negative electrode posts 400, 400. Thus, the extension length of the first and second wires 510 and 520 can be reduced, the production cost can be saved, and the complexity of the wire harness can be reduced.

In some embodiments, the height of the detection element 200 protruding from the wall portion 110 outside the housing 100 is lower than the height of the pole 400 protruding from the wall portion 110 outside the housing 100. It will be appreciated that the distance from the end of the sensing element 200 remote from the wall 110 to the wall 110 is less than the distance from the end of the post 400 remote from the wall 110 to the wall 110. In other embodiments, the height of the detecting element 200 protruding from the wall portion 110 outside the housing 100 may be equal to the height of the pole 400 protruding from the wall portion 110 outside the housing 100. Thereby, the overall size of the battery cell 10 is facilitated to be reduced, and the influence of the detection element 200 caused by the interaction of the battery cell 10 with other components is reduced, so that the battery cell 10 can be adapted to more application scenarios.

In some embodiments, the sensing element 200 includes a mounting housing 210 and a sensor 220, the mounting housing 210 being disposed through the wall portion 110, the sensor 220 being mounted within the mounting housing 210. The mounting case 210 may have a certain strength so as to protect the sensor 220. In some application scenarios, the wall portion 110 may be provided with a mounting hole that communicates between the interior of the housing 100 and the exterior of the housing 100, and the mounting shell 210 may be disposed through the wall portion 110 by passing through the mounting hole on the wall portion 110, and it is understood that when the mounting shell 210 is mounted in the mounting hole, the mounting shell 210 may also seal the mounting hole, thereby isolating the interior environment of the housing 100 from the exterior environment of the housing 100. The material of the sensor 220 may include, but is not limited to, stainless steel, etc. The sensor 220 is mounted in the mounting case 210, and the sensor 220 may be mounted at a portion of the mounting case 210 located inside the case 100, thereby detecting a state signal inside the battery cell 10.

In some embodiments, the detecting element 200 includes a conductive member 230, the conductive member 230 is connected to a side of the mounting case 210 facing the outside of the housing 100, and the transmitting element 300 is connected to the conductive member 230. The conductive member 230 may be made of a conductive material, and the conductive member 230 is connected to the side of the mounting case 210 facing the outside of the housing 100 and connected to the transmission element 300, so that the transmission element 300 can supply power to the sensing element 200 through the conductive member 230. The transmission element 300 and the conductive member 230 may be connected in various manners, for example, the connection between the two may be by crimping, welding, plugging, bolting, winding, etc. In some applications, the conductive member 230 may be a conductive post, and the conductive posts may be plural in number, and the transmission element 300 may be inserted into the conductive post. Therefore, the sensor 220 is mounted in the mounting shell 210, the sensor 220 can be well protected by the mounting shell 210, the detecting element 200 can penetrate through the wall portion 110 through the mounting shell 210, the mounting stability of the detecting element 200 is improved, the detecting element 200 can collect battery data through the sensor 220 and is electrically connected with the transmission element 300 through the conductive piece 230, and the connection stability between the detecting element 200 and the transmission element 300 is improved.

In some embodiments, the mounting shell 210 has a receiving groove 211, the notch of the receiving groove 211 faces the inside of the housing 100, the sensor 220 is located in the receiving groove 211, the detecting element 200 further includes a diaphragm 240, and the diaphragm 240 blocks the notch of the receiving groove 211. The shape of the receiving groove 211 may be matched with the shape of the sensor 220 so that the sensor 220 can be installed in the receiving groove 211. The shape of the membrane 240 may also match the shape of the notch of the receiving groove 211. The notch of the accommodating groove 211 faces the inside of the shell 100, and the diaphragm 240 can seal the notch of the accommodating groove 211, so that the sensor 220 can be carried by the diaphragm 240 and installed in the accommodating groove 211. Alternatively, the diaphragm 240 may be made of a material having a certain strength so as to improve the safety of the sensor 220, and illustratively, the material of the diaphragm 240 may include, but is not limited to, stainless steel or the like. Thus, the cooperation of the receiving groove 211 and the diaphragm 240 can provide support for the sensor 220, and the sensor 220 can be protected through the receiving groove 211 and the diaphragm 240, so that the risk of damage to the sensor 220 is reduced.

In some embodiments, the sensor 220 includes a temperature sensor 220 and/or a pressure sensor 220. The temperature sensor 220 may be used to detect temperature data of the battery cell 10, and the pressure sensor 220 may be used to detect pressure data of the battery cell 10. The sensor 220 may include one or both of a temperature sensor 220 and a pressure sensor 220. Thus, temperature and/or pressure data of the battery cell 10 may be detected by the sensor 220.

In some embodiments, the mounting case 210 includes a main body 212 and a first flange 213, the main body 212 is disposed through the wall 110, the first flange 213 is located outside the housing 100 and connected to the main body 212, the first flange 213 is spaced from the wall 110, the battery cell 10 further includes a clip 600, the radial dimension of the first flange 213 is greater than the radial dimension of the main body 212, and the clip 600 is clipped between the first flange 213 and the wall 110. Illustratively, the mounting case 210 may be penetrated through the wall portion 110 by a mounting hole, and the radial dimension of the body portion 212 may be matched with the radial dimension of the mounting hole, and the radial dimension of the first flange portion 213 is greater than the radial dimension of the body portion 212, thereby making it difficult for the first flange portion 213 to enter the inside of the battery cell 10 through the mounting hole. The snap member 600 is snapped between the first flange 213 and the wall 110, so that the first flange 213 does not directly contact the wall 110, thereby alleviating the risk of damage to the wall 110 caused by the first flange 213 pressing the wall 110. The first flange 213 and the snap 600 cooperate to facilitate the partial snap-fit of the mounting shell 210 to the exterior of the housing 100. Therefore, the first flange 213 can be clamped to the wall 110 by the fastening device 600, and the main body 212 and the wall 110 can be easily detached, so that the main body 212 can be easily inserted into the wall 110, and the stability of the main body 212 and the wall 110 can be improved.

In some embodiments, the mounting shell 210 includes a second flange portion 214, the second flange portion 214 being located inside the housing 100 and connected to the body portion 212, the second flange portion 214 having a radial dimension greater than the radial dimension of the body portion 212, the second flange portion 214 abutting the wall portion 110. Illustratively, the mounting case 210 may be penetrated through the wall portion 110 by a mounting hole, the radial dimension of the body portion 212 may be matched to the radial dimension of the mounting hole, and the radial dimension of the second flange portion 214 is greater than the radial dimension of the body portion 212, thereby making it difficult for the second flange portion 214 to exit the inside of the battery cell 10 through the mounting hole. The second flange portion 214 abuts against the wall portion 110, so that the connection between the mounting shell 210 and the wall portion 110 is tighter, the tightness of the mounting shell 210 is improved, the internal environment and the external environment of the battery cell 10 are isolated, and the risk of leakage of electrolyte and the like in the battery cell 10 through the mounting shell 210 penetrating through the wall portion 110 is reduced. Thus, the second flange 214 can be engaged with the wall 110 on the side closer to the inside of the housing 100, thereby further improving the stability of the attachment and fixation of the main body 212 and the wall 110.

In some embodiments, the battery cell 10 further includes a seal 700, the seal 700 disposed around the body portion 212, the seal 700 sandwiched between the wall portion 110 and the second flange portion 214. The seal ring 700 may be annular, and the seal ring 700 may be used to seal a gap between the wall portion 110 and the second flange portion 214 to reduce the risk of the internal environment of the battery cell 10 communicating with the external environment. The seal ring 700 may have a certain elasticity, so that when the seal ring 700 is clamped between the wall portion 110 and the second flange portion 214, the seal ring is tightly attached to the wall portion 110 and the second flange portion 214, thereby reducing the risk of communication between the internal environment and the external environment of the battery cell 10. Thus, the sealing ring 700 seals between the wall portion 110 and the second flange portion 214, thereby isolating the internal environment of the battery cell 10 from the external environment.

In some embodiments, the housing 100 includes a shell 120 and an end cap 130, the end cap 130 covers an open end of the shell 120, and the detection element 200 is disposed through the end cap 130. The end cap 130 refers to a member that is covered at the opening of the case 120 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap 130 may be adapted to the shape of the housing 120 to fit the housing 120. Optionally, the end cover 130 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 130 is not easy to deform when being extruded and collided, so that the battery cell 10 can have higher structural strength, and the safety performance can be improved. The cap 130 may be provided with functional parts such as electrode terminals and the like. The electrode terminals may be used to be electrically connected with the electrode assembly for outputting or inputting electric power of the battery cell 10. In some embodiments, the electrode terminal may include a post 400. The post 400 may include a positive post 400 and a negative post 400 for output of current and connection to external circuitry. The material of the end cap 130 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. The case 120 is an assembly for mating with the end cap 130 to form an internal environment of the battery cell 10, wherein the formed internal environment may be used to house the electrode assembly, electrolyte, and other components. The case 120 and the end cap 130 may be separate components, and an opening may be provided in the case 120, and the interior environment of the battery cell 10 may be formed by covering the opening with the end cap 130 at the opening. It is also possible to integrate the end cap 130 and the housing 120, specifically, the end cap 130 and the housing 120 may form a common connection surface before other components are put into the housing, and when the interior of the housing 120 needs to be sealed, the end cap 130 is then covered with the housing 120. The housing 120 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 120 may be determined according to the specific shape and size of the electrode assembly. The material of the housing 120 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. Therefore, the end cover 130 can be matched with the housing 120 to isolate the internal environment of the battery cell 10 from the external environment, and meanwhile, the detection element 200 is penetrated through the end cover 130, so that the detection element 200 can be conveniently installed and fixed.

In some embodiments, the end cap 130 is provided with a filling hole 800, and the filling hole 800 is spaced from the detecting element 200. The injection hole 800 may be understood as a through hole penetrating the end cap 130, and electrolyte may be injected into the case 100 through the injection hole 800 during the production of the battery cell 10. The liquid injection holes 800 are arranged at intervals with the detection element 200, so that the risk of the decrease of the tightness of the battery cell 10 caused by the interference between the liquid injection holes 800 and the detection element 200 is reduced, and the electrolyte can be injected into the battery cell 10 through the liquid injection holes 800, so that the electrolyte can be conveniently supplemented into the shell 100.

Referring to fig. 9, fig. 9 is a schematic view of a structure of a battery according to one or more embodiments of the present application.

In some embodiments, the battery 2 includes a battery management system 900, the battery management system 900 being communicatively coupled to the transmission element 300. The Battery management system 900 (Battery MANAGEMENT SYSTEM, BMS) can have great influence on the safe running of the whole electric vehicle, the whole vehicle control strategy selection, the selection of the charging mode and the running cost. The battery management system 900 is required to complete real-time monitoring and fault diagnosis of the state of the battery system in the running process or the charging process of the vehicle, and inform the whole vehicle controller or the charger in a bus mode so as to achieve the purpose of effectively and efficiently using the battery system by adopting a reasonable control strategy. In this embodiment, the battery management system 900 may be communicatively connected to the transmission element 300, so as to monitor the states of the cell voltages, temperatures, and module currents of the plurality of battery cells 10 through the battery management system 900 at the same time, and perform battery equalization control, fault diagnosis, and the like. Thus, the battery management system 900 can provide control signals for the transmission element 300 and the detection element 200, so that the detection element 200 can detect the state of the battery cell 10, and can manage the working state of the battery cell 10 according to the battery data transmitted by the transmission element 300.

In summary, the battery cell 10 provided by the present application includes a housing 100, a detecting element 200 and a transmitting element 300, wherein the housing 100 includes a wall portion 110; the detecting element 200 includes a mounting case 210 and a sensor 220, the mounting case 210 is penetrated through the wall portion 110, the sensor 220 is mounted in the mounting case 210, and the sensor 220 is used for collecting battery data; the transmission element 300 is located outside the housing 100, the transmission element 300 is connected to the detection element 200, and the transmission element 300 is used for receiving and transmitting battery data. Therefore, the detecting element 200 is disposed through the wall 110, the detecting element 200 is exposed inside the housing 100 to facilitate the detecting element 200 to collect battery data, and the detecting element 200 is exposed outside the housing 100 to facilitate the detecting element 200 to connect with the transmitting element 300, thereby facilitating the transmitting element 300 to transmit the battery data collected by the detecting element 200. Compared with other types of battery cells, the battery cell 10 of the application has a simple structure and is more convenient for transmitting battery data.

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

Claims

1. A battery cell, the battery cell comprising:

A housing including a wall portion;

The detection element comprises a mounting shell and a sensor, wherein the mounting shell penetrates through the wall part, the sensor is mounted in the mounting shell, and the sensor is used for acquiring battery data;

And the transmission element is positioned outside the shell, is connected with the detection element and is used for receiving and transmitting the battery data.

2. The battery cell of claim 1, further comprising a post disposed on the wall, wherein the detection element and the transmission element are both electrically connected to the post.

3. The battery cell of claim 2, further comprising a wire, wherein the transmission element is electrically connected to the post via the wire, and wherein the transmission element is electrically connected to the detection element.

4. The battery cell of claim 3, wherein the post comprises a first post and a second post of opposite polarity, the first post and the second post being spaced apart, the wire comprising a first wire and a second wire, the first wire connecting the transmission element and the first post, the second wire connecting the transmission element and the second post.

5. The battery cell of claim 4, wherein the detection element and the transmission element are located between the first post and the second post.

6. The battery cell of claim 2, wherein the height of the detection element protruding from the wall outside the housing is lower than the height of the post protruding from the wall outside the housing.

7. The battery cell according to any one of claims 1 to 6, wherein the detection element includes a conductive member connected to a side of the mounting case facing the outside of the housing, and the transmission element is connected to the conductive member.

8. The battery cell of claim 7, wherein the mounting housing has a receiving slot with a notch facing the interior of the housing, the sensor being located in the receiving slot, the sensing element further comprising a diaphragm that blocks the notch of the receiving slot.

9. The battery cell of claim 7, wherein the sensor comprises a temperature sensor and/or a pressure sensor.

10. The battery cell of claim 7, wherein the mounting shell includes a main body portion and a first flange portion, the main body portion is disposed through the wall portion, the first flange portion is disposed outside the housing and is connected to the main body portion, the first flange portion is disposed at a distance from the wall portion, the battery cell further includes a clip, a radial dimension of the first flange portion is greater than a radial dimension of the main body portion, and the clip is disposed between the first flange portion and the wall portion.

11. The battery cell of claim 10, wherein the mounting shell includes a second flange portion positioned within the housing and connected to the body portion, the second flange portion having a radial dimension greater than a radial dimension of the body portion, the second flange portion abutting the wall portion.

12. The battery cell of claim 11, further comprising a seal ring disposed around the body portion, the seal ring sandwiched between the wall portion and the second flange portion.

13. The battery cell of any one of claims 1 to 6, wherein the housing comprises a shell and an end cap, the end cap being disposed over the open end of the shell, the sensing element being disposed through the end cap.

14. The battery cell of claim 13, wherein the end cap is provided with a fluid injection hole, and the fluid injection hole is spaced apart from the detection element.

15. A battery comprising a cell according to any one of claims 1-14.

16. The battery of claim 15, wherein the battery comprises a battery management system in communication with the transmission element.

17. An electrical device comprising a battery as claimed in claim 15 or 16.