Battery cell, battery, and electric apparatus

Abstract

Disclosed in the present application are a battery cell, a battery, and an electric apparatus. The battery cell comprises a housing and a detection module, wherein the housing comprises a wall portion, the wall portion comprising a light-transmitting component; and the detection module is arranged inside the housing, and the detection module comprises a detection element and a first optical communication element, the detection element being connected to the first optical communication element, the first element being used for detecting state data of the battery cell, and the first optical communication element being used for transmitting, to the outside of the housing and by means of the light-transmitting component, signal light that is generated on the basis of the state data. Thus, compared with wired transmission, the wireless transmission of state data of a battery to the outer side of a battery cell can further reduce the complexity of wiring harnesses in the battery cell, and it is not necessary to additionally provide, on the housing, a through hole for the wiring harnesses to pass through, thereby reducing the overall processing difficulty.

Description

Battery cell, battery and power-consuming device

[0001] This application claims priority to Chinese patent application No. 2024202671584, filed on February 2, 2024, entitled “A battery cell, a battery and an electrical device,” which is incorporated herein by reference in its entirety.

Technical field

[0002] The present application relates to the field of battery technology, and in particular to a battery cell, a battery, and an electrical device. [Background Technology]

[0003] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle life, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0004] A battery generally includes one or more battery cells. During use, the working status of the battery cell can be monitored by a built-in detection module, and the generated working status is then transmitted to the outside of the battery cell via wired transmission. However, the wired transmission method will make the overall wiring harness redundant, and further processing of the adaptable wiring harness structure on the battery cell is required, making the overall processing more difficult.

[0005] [Summary of the invention]

[0006] The main purpose of this application is to provide a battery cell, a battery and an electrical device, aiming to solve the above-mentioned technical problems existing in the prior art.

[0007] To solve the above problems, the present application provides a battery cell, which includes: a housing and a detection module, wherein the housing includes a wall portion, and the wall portion includes a light-transmitting component; the detection module is disposed inside the housing, and the detection module includes a detection element and a first optical communication element, wherein the detection element is connected to the first optical communication element, and the detection element is used to detect the status data of the battery cell, and the first optical communication element is used to transmit the signal light generated according to the status data to the outside of the housing through the light-transmitting component. Thus, the status data of the battery cell is detected by the built-in detection element, and the first optical communication element transmits the signal light generated according to the status data to the outside of the housing through the light-transmitting component, thereby transmitting the battery status data to the outside of the battery cell by wireless transmission. Compared with the wired transmission method, this can further reduce the complexity of the wiring harness in the battery cell, and there is no need to open additional through-holes in the housing for passing the wiring harness, thereby reducing the overall processing difficulty.

[0008] In some embodiments, the light-transmitting component penetrates opposite surfaces of the wall portion in the thickness direction of the wall portion. Thus, the light-transmitting component penetrates opposite surfaces of the wall portion in the thickness direction of the wall portion, facilitating the transmission of signal light from the inside of the battery cell to the outside of the battery cell through the light-transmitting component, thereby improving the transmission efficiency of the signal light.

[0009] In some embodiments, the wall portion is provided with a mounting hole that penetrates the wall portion along the thickness direction, and the light-transmitting component includes a first light-transmitting portion and a second light-transmitting portion that are connected to each other, the first light-transmitting portion being embedded in the mounting hole, and the second light-transmitting portion being connected to the side of the wall portion facing the outside of the housing, or the second light-transmitting portion being connected to the side of the wall portion facing the inside of the housing. Thus, the second light-transmitting portion is connected to the side of the wall portion facing the outside of the housing or the side facing the inside of the housing, facilitating relative fixation with the housing via the second light-transmitting portion, and the first light-transmitting portion being embedded in the mounting hole, and the first light-transmitting portion can be installed and limited by the mounting hole, thereby improving the stability of the connection of the light-transmitting component.

[0010] In some embodiments, the light-transmitting component further includes a third light-transmitting portion, wherein the second light-transmitting portion and the third light-transmitting portion are respectively connected to both ends of the first light-transmitting portion in the thickness direction, and one of the second light-transmitting portion and the third light-transmitting portion is connected to the side of the wall portion facing the outside of the housing, and the other is connected to the side of the wall portion facing the inside of the housing. Thus, by respectively connecting the third light-transmitting portion and the second light-transmitting portion to opposite sides of the wall portion, the stability of the connection between the light-transmitting component and the wall portion can be further improved.

[0011] In some embodiments, the wall portion is provided with a mounting hole extending through the wall portion along its thickness, and the light-transmitting component further comprises a light-transmitting body and a sealing member, wherein the sealing member is disposed around the periphery of the light-transmitting body, and the light-transmitting body is embedded in the mounting hole via the sealing member. Thus, the sealing member is disposed around the periphery of the light-transmitting body, facilitating the embedding of the light-transmitting body in the mounting hole via the sealing member, thereby improving the stability of the light-transmitting body installation and the sealing effect of the mounting hole, thereby mitigating the risk of leakage of electrolyte, etc., within the battery cell, through the mounting hole.

[0012] In some embodiments, the sealing member includes a sealing body portion and a sealing connection portion. The sealing body portion is provided with a mounting groove, the notch of the mounting groove facing the exterior of the housing, the light-transmitting body is disposed within the mounting groove, and the sealing connection portion is connected to the side of the wall portion facing the exterior of the housing. Thus, with the notch of the mounting groove facing the exterior of the housing and the light-transmitting body disposed within the mounting groove, the light-transmitting body can be easily mounted and secured via the sealing body, and the sealing connection portion is connected to the side of the wall portion facing the exterior of the housing. Furthermore, the sealing member can simplify the securing method of the light-transmitting component, thereby improving installation efficiency.

[0013] In some embodiments, a light-transmitting hole is provided in the bottom wall of the mounting slot, connecting the interior of the housing and the mounting slot. The light-transmitting body covers the light-transmitting hole, and signal light is transmitted to the exterior of the housing through the light-transmitting hole and the light-transmitting body. Thus, by providing a light-transmitting hole in the bottom wall of the mounting slot and having the light-transmitting body cover the light-transmitting hole, signal light can be easily transmitted from the interior of the battery cell to the exterior of the battery cell through the light-transmitting component, thereby improving the stability of signal light transmission.

[0014] In some embodiments, the mounting hole is a liquid injection hole. Thus, by using the liquid injection hole as the mounting hole, it is unnecessary to open an additional mounting hole on the wall to accommodate the light-transmitting component, making the overall structure simpler.

[0015] In some embodiments, the battery cell further includes an electrode column and a first conductive member. The electrode column is disposed through the wall portion. The first conductive member is located within the housing and is respectively connected to the electrode column and the detection module, thereby forming a current loop between the electrode column and the detection module. Thus, by forming a current loop between the detection module and the electrode column through the first conductive member, power can be supplied to the detection module via the electrode column, reducing the difficulty of powering the detection module.

[0016] In some embodiments, the electrode column further comprises a positive electrode column and a negative electrode column, the positive electrode column and the negative electrode column are respectively provided through the wall portion, the detection module is provided between the positive electrode column and the negative electrode column, and the first conductive member comprises two first wires, one first wire connecting the positive electrode column and the detection module, and the other first wire connecting the negative electrode column and the detection module. Thus, the detection module is provided between the positive electrode column and the negative electrode column, which can simultaneously reduce the length of the wiring harness of the two first wires, simplify the complexity of the wiring harness layout, and reduce the difficulty of powering the detection module.

[0017] In some embodiments, the battery cell further comprises a lower plastic member, which is fitted against the side of the wall facing the interior of the housing. The lower plastic member is provided with a receiving groove, the notch of which faces the wall, and the detection module is disposed within the receiving groove. Thus, fitting the lower plastic member against the side of the wall facing the interior of the housing allows electrical insulation between the interior of the housing and the wall to be achieved through the lower plastic member. Providing the receiving groove in the lower plastic member, so that the detection module can be disposed within the receiving groove, simplifies the complexity of mounting and securing the detection module.

[0018] In some embodiments, the battery cell further includes a data processing module, which is disposed outside the housing. The data processing module includes a second optical communication element and a data processing element that are interconnected. The second optical communication element is configured to receive signal light, and the data processing element is configured to receive data generated based on the signal light. Thus, the data processing module is disposed outside the housing, facilitating the second optical communication element to receive signal light outside the housing and receive battery cell status data via the data processing element. This enables the transmission and reception of battery cell data via optical signal transmission. Compared to wired transmission methods, this can further reduce the complexity of the wiring harness in the battery cell and eliminate the need for additional through-holes in the housing for routing the wiring harness, thus reducing overall processing difficulty.

[0019] In some embodiments, the first optical communication element, the light-transmitting component, and the second optical communication element are sequentially arranged in the thickness direction of the wall portion. Thus, the first optical communication element, the light-transmitting component, and the second optical communication element are sequentially arranged in the thickness direction of the wall portion, which can reduce the transmission path of the signal light, improve the reception efficiency of the signal light, and thus improve the overall data transmission efficiency.

[0020] In some embodiments, the battery cell further includes an electrode column and a second conductive member. The electrode column is disposed through the wall portion, and the second conductive member is located outside the housing and is respectively connected to the electrode column and the data processing module, thereby forming a current loop between the electrode column and the data processing module. Thus, the second conductive member forms a current loop between the data processing module and the electrode column, facilitating power supply to the data processing module via the electrode column, thereby reducing the difficulty of powering the data processing module.

[0021] In some embodiments, the electrode column further comprises a positive electrode column and a negative electrode column, the positive electrode column and the negative electrode column are respectively disposed through the wall portion, the data processing module is disposed between the positive electrode column and the negative electrode column, and the second conductive member comprises two second wires, one second wire connecting the positive electrode column and the data processing module, and the other second wire connecting the negative electrode column and the data processing module. Thus, the data processing module is disposed between the positive electrode column and the negative electrode column, which can simultaneously reduce the length of the wiring harness of the two second wires, simplify the complexity of the wiring harness layout, and reduce the difficulty of powering the data processing module.

[0022] In some embodiments, the data processing module further includes a wireless communication component connected to the data processing component and configured to transmit the data generated by the signal light to an external device. Thus, the wireless communication component can transmit the data generated by the signal light to an external device, thereby reducing the complexity of the wiring harness compared to wired transmission methods and making the entire communication method more concise.

[0023] In some embodiments, the detection element includes one or more of a temperature sensor, an air pressure sensor, a voltage sensor, and an impedance sensor. Therefore, the detection element includes one or more of a temperature sensor, an air pressure sensor, a voltage sensor, and an impedance sensor, which facilitates targeted detection of the operating status of the battery cell and facilitates targeted management of the battery cell.

[0024] In order to solve the above problems, the present application provides a battery, which includes the above-mentioned battery cell.

[0025] In order to solve the above problems, the present application provides an electrical device, which includes the battery as described above.

Brief Description of the Drawings

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] FIG1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application;

[0028] FIG2 is a schematic diagram of an exploded structure of a battery according to one or more embodiments of the present application;

[0029] FIG3 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments of the present application;

[0030] FIG4 is a schematic top view of the battery cell shown in FIG3 ;

[0031] FIG5 is a schematic diagram of a first cross-sectional structure of the battery cell shown in FIG4 along the AA direction;

[0032] FIG6 is a schematic diagram of a second cross-sectional structure of the battery cell shown in FIG4 along the AA direction;

[0033] FIG7 is a schematic diagram of a third cross-sectional structure of the battery cell shown in FIG4 along the AA direction;

[0034] FIG8 is a schematic diagram of a fourth cross-sectional structure of the battery cell shown in FIG4 along the AA direction;

[0035] FIG. 9 is a fifth cross-sectional structural diagram of the battery cell shown in FIG. 4 along the AA direction.

[0036] Reference numerals: vehicle 1; battery 2; controller 3; motor 4; housing 20; first portion 21; second portion 22; battery cell 10; Casing 100; wall 110; mounting hole 111; shell 120; electrode assembly 130; electrode column 140; positive column 141; negative column 142; detection module 200; first optical communication element 210; signal light 211; detection element 220; light-transmitting component 300; first light-transmitting portion 310; second light-transmitting portion 320; third light-transmitting portion 330; light-transmitting body 340; sealing member 400; sealing body portion 410; light-transmitting hole 411; sealing connection portion 420; mounting groove 430; data processing module 500; second optical communication element 510; data processing element 520; wireless communication element 530; first conductive member 600; first wire 610; second conductive member 700; second wire 710; lower plastic member 800; accommodating groove 810. [Specific implementation method]

[0037] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0039] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0040] Batteries mentioned in this field can be categorized as either primary batteries or rechargeable batteries, depending on whether they are rechargeable. Primary batteries are also called "disposable" batteries or primary batteries because once they are depleted, they cannot be recharged and must be discarded. Rechargeable batteries are also called secondary batteries, secondary batteries, or storage batteries. Rechargeable batteries are manufactured using different materials and processes than primary batteries. Their advantage is that they can be reused multiple times after charging, and their output current capacity is higher than that of most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries offer advantages such as light weight, high capacity (1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and a very low self-discharge rate. Consequently, despite their relatively high price, they are widely used. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used for these applications is relatively low, they offer high output, high charging current, and a long service life, albeit at a higher cost.

[0041] The batteries described in the embodiments of this application are either rechargeable batteries or disposable batteries. The embodiments disclosed herein will be described primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries described in the embodiments disclosed herein can be directly or indirectly used in appropriate devices to power such devices.

[0042] The present application provides an electrical device, which may include but is not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft. The electrical device may include a battery, which may provide electrical energy to the device to achieve corresponding functions.

[0043] The present application also provides an electric vehicle, which may include a battery.

[0044] Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0045] Vehicle 1 can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The latter can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Vehicle 1 is internally provided with a battery 2, which can be located at the bottom, front, or rear of vehicle 1. Battery 2 can be used to power vehicle 1, for example, as an operating power source for vehicle 1. Vehicle 1 also includes a controller 3 and a motor 4. Controller 3 controls battery 2 to power motor 4, for example, to meet the power requirements of vehicle 1 for starting, navigation, and driving.

[0046] In some embodiments of the present application, the battery 2 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0047] In order to improve the performance of electrical devices, the present application also provides a battery. See FIG2 , which is a schematic diagram of the exploded structure of a battery according to one or more embodiments of the present application.

[0048] The shape of the battery may include but is not limited to a square, cylindrical, or any other shape.

[0049] In some embodiments, the battery 2 may include a housing 20 and a battery cell 10, with the battery cell 10 being housed within the housing 20. The housing 20 is used to provide a storage space for the battery cell 10, and the housing 20 may adopt a variety of structures. In some embodiments, the housing 20 may include a first portion 21 and a second portion 22, the first portion 21 and the second portion 22 overlapping each other, and the first portion 21 and the second portion 22 jointly define a storage space for accommodating the battery cell 10. The second portion 22 may be a hollow structure with one end open, and the first portion 21 may be a plate-like structure, with the first portion 21 overlapping the open side of the second portion 22, so that the first portion 21 and the second portion 22 jointly define a storage space; the first portion 21 and the second portion 22 may also be hollow structures both with one side open, with the open side of the first portion 21 overlapping the open side of the second portion 22.

[0050] Battery 2 may include multiple battery cells 10, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 10. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire battery cell 10 may be housed within the housing 20. Alternatively, battery 2 may comprise multiple battery cells 10 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 20. Battery 2 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 10.

[0051] The battery cell 10 can be manufactured in two ways: laminated and wound. Laminated batteries have a uniform current collection effect, low internal resistance, and high specific power. However, in order to improve precision, they require extremely high mold precision, high equipment investment, and a relatively complex process, resulting in low production efficiency. Wound batteries are simple to manufacture, with average equipment precision requirements for the production and assembly processes, high production efficiency, and low cost. In terms of performance, wound batteries have excellent high and low temperature performance, charge very quickly, have an ultra-long life, stable high output voltage, a sturdy structure, and strong shock resistance.

[0052] In a related embodiment, during use of the battery cell, the working status of the battery cell can be monitored by a built-in detection module, and then the generated working status is transmitted to the outside of the battery cell through wired transmission. However, the wired transmission method will make the overall wiring harness redundant, and it is necessary to further process the structure of the adaptable wiring harness on the battery cell, making the overall processing more difficult.

[0053] In order to solve the technical problems existing in the related art, the present application provides a battery cell, wherein a light-transmitting component for light transmission is provided on the outer shell of the battery cell, and a detection module is built into the battery cell. The internal status data of the battery cell is detected by the detection module, and then the internal status data is converted into signal light by the detection module. The signal light is transmitted from the inside of the outer shell to the outside of the outer shell through the light-transmitting component, thereby replacing the traditional solution of transmitting the status data from the inside of the outer shell to the outside of the outer shell by wire.

[0054] Specifically, referring to Figures 3 to 5, Figure 3 is a schematic diagram of the decomposed structure of a battery cell according to one or more embodiments of the present application, Figure 4 is a schematic diagram of the top view structure of the battery cell shown in Figure 3, and Figure 5 is a schematic diagram of the first cross-sectional structure of the battery cell shown in Figure 4 along the AA direction.

[0055] The battery cell 10 includes a shell 100 and a detection module 200, the shell 100 includes a wall 110, and the wall 110 includes a light-transmitting component 300; the detection module 200 is arranged inside the shell 100, and the detection module 200 includes a detection element 220 and a first optical communication element 210, the detection element 220 is connected to the first optical communication element 210, the detection element 220 is used to detect the status data of the battery cell 10, and the first optical communication element 210 is used to transmit the signal light 211 generated according to the status data to the outside of the shell 100 through the light-transmitting component 300.

[0056] The wall portion 110 can be any side wall of the housing 100. For example, when the housing 100 is square, any portion corresponding to the six sides of the square housing 100 can serve as the wall portion 110 in this embodiment. When the housing 100 includes an end cap and a housing 120, the wall portion 110 can be an end cap. Specifically, an end cap is a component that covers the opening of the housing 120 to isolate the internal environment of the battery cell 10 from the external environment. The shape of the end cap can be adapted to the shape of the housing 120 to fit the housing 120. Optionally, the end cap can be made of a material with a certain hardness and strength (such as an aluminum alloy). This makes the end cap less susceptible to deformation during compression and collision, thereby providing the battery cell 10 with greater structural strength and improved safety. In some embodiments, the end cap can also be provided with an explosion-proof component to release internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The end cap can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this. The shell 120 is a component used to cooperate with the end cap to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly 130, electrolyte and other components. The shell 120 and the end cap can be independent components. An opening can be set on the shell 120, and the internal environment of the battery cell 10 is formed by closing the opening with the end cap at the opening. Without limitation, the end cap and the shell 120 can also be integrated. Specifically, the end cap and the shell 120 can form a common connection surface before other components are put into the shell. When the interior of the shell 120 needs to be encapsulated, the end cap is closed with the shell 120. The battery cell 10 may also include an electrode assembly 130, which is a component in the battery cell 10 where electrochemical reactions occur. One or more electrode assemblies 130 may be contained in the shell 120. The electrode assembly 130 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrodes containing active material form the main body of electrode assembly 130, while the portions of the positive and negative electrodes without active material each form a tab. The positive and negative tabs can be located together at one end of the main body or separately at opposite ends. During the battery's charge and discharge processes, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current circuit.

[0057] The light-transmitting component 300 can allow light to pass through, for example, light can be transmitted from one side surface of the light-transmitting component 300 to the other side surface. The light-transmitting component 300 can be of any shape, and the light-transmitting component 300 can be embedded in the wall 110 of the housing 100, or the entire wall 110 can be used as the light-transmitting component 300, etc. The light-transmitting component 300 can allow light inside the housing 100 to be transmitted to the outside of the housing 100 through the light-transmitting component 300. The detection module 200 can be located as a whole inside the housing 100. The detection module 200 includes a detection element 220 and a first optical communication element 210. The detection element 220 can be used to detect the status data of the battery cell 10. For example, the status data may include but is not limited to temperature data, air pressure data, voltage data and / or impedance data, etc. The first optical communication element 210 includes but is not limited to an infrared optical communication element. The first optical communication element 210 can be used to receive or emit signal light 211. The signal light 211 can penetrate the light-transmitting component 300 from the inside of the housing 100 to the outside of the housing 100. In some embodiments, after the detection element 220 detects the status data of the battery cell 10, the detection element 220 may convert the status data into signal light 211, which is then transmitted through the light-transmitting component 300 by the first optical communication element 210 to the exterior of the housing 100. Alternatively, after the detection element 220 detects the status data of the battery cell 10, the status data may be transmitted to the first optical communication element 210, which converts the status data into signal light 211 and transmits the signal light 211 through the light-transmitting component 300 to the exterior of the housing 100. The signal light 211 may be emitted directly to the light-transmitting component 300, or another light-guiding element may be provided, disposed in the optical path of the signal light 211, to receive and guide the signal light 211 to the light-transmitting component 300. After the signal light 211 is transmitted outside the housing 100, it may be received and demodulated by another module to wirelessly obtain the status data of the battery cell 10.

[0058] Through the above embodiment, the status data of the battery cell 10 is detected by the built-in detection element 220, and the first optical communication element 210 transmits the signal light 211 generated according to the status data to the outside of the housing 100 through the light-transmitting component 300, so as to transmit the battery status data to the outside of the battery cell 10 by wireless transmission. Compared with the wired transmission method, the complexity of the wiring harness in the battery cell 10 can be further reduced, and there is no need to open an additional through hole on the housing 100 for passing the wiring harness, thereby reducing the overall processing difficulty.

[0059] In some embodiments, the detection element 220 includes one or more of a temperature sensor, an air pressure sensor, a voltage sensor, and an impedance sensor. Therefore, the detection element 220 includes one or more of a temperature sensor, an air pressure sensor, a voltage sensor, and an impedance sensor, which facilitates targeted detection of the operating status of the battery cell 10 and facilitates targeted management of the battery cell 10.

[0060] Furthermore, the light-transmitting member 300 extends through opposite surfaces of the wall portion 110 in the thickness direction of the wall portion 110. The light-transmitting member 300 can be of any shape, for example, cylindrical, prism-shaped, truncated cone-shaped, conical, inclined column-shaped, etc. The light-transmitting member 300 extends through opposite surfaces of the wall portion 110 in the thickness direction of the wall portion 110, that is, the light-transmitting member 300 is simultaneously exposed inside and outside the housing 100. When the signal light 211 is incident on the light-transmitting member 300 from inside the housing 100, it can be emitted to the outside of the housing 100 through the light-transmitting member 300, thereby transmitting the status data of the battery cell 10 from inside the housing 100 to the outside of the housing 100 via wireless transmission, thereby improving the transmission efficiency of the signal light 211.

[0061] 6 , which is a second cross-sectional structural diagram of the battery cell 10 shown in FIG. 4 along the AA direction.

[0062] The wall portion 110 is provided with a mounting hole 111 extending through the wall portion 110 along its thickness. The light-transmitting component 300 includes a first light-transmitting portion 310 and a second light-transmitting portion 320 connected to each other. The first light-transmitting portion 310 is embedded in the mounting hole 111, and the second light-transmitting portion 320 is connected to the side of the wall portion 110 facing the outside of the housing 100, or the second light-transmitting portion 320 is connected to the side of the wall portion 110 facing the inside of the housing 100. The first light-transmitting portion 310 and the second light-transmitting portion 320 can be cylindrical, terraced, conical, or other shapes. The shape of the mounting hole 111 can match the shape of the first light-transmitting portion 310. The radial dimension of the mounting hole 111 can be slightly larger than the radial dimension of the first light-transmitting portion 310, so that the first light-transmitting portion 310 can be inserted into the mounting hole 111, and the outer wall of the first light-transmitting portion 310 is tightly fitted with the inner wall of the mounting hole 111. The radial dimension of the second light-transmitting portion 320 may be greater than the radial dimension of the first light-transmitting portion 310. When the first light-transmitting portion 310 is inserted into the mounting hole 111, the second light-transmitting portion 320 may overlap the side of the wall portion 110 facing the outside of the shell 100, or overlap the side of the wall portion 110 facing the inside of the shell 100, so that the light-transmitting component 300 and the wall portion 110 remain relatively fixed. For example, the second light-transmitting portion 320 can be fixedly connected to the wall portion 110 by bonding, welding or melting.

[0063] Furthermore, the light-transmitting component 300 also includes a third light-transmitting portion 330, and the second light-transmitting portion 320 and the third light-transmitting portion 330 are respectively connected to the two ends of the first light-transmitting portion 310 in the thickness direction, one of the second light-transmitting portion 320 and the third light-transmitting portion 330 is connected to the side of the wall portion 110 facing the outside of the shell 100, and the other is connected to the side of the wall portion 110 facing the inside of the shell 100. The third light-transmitting portion 330 and the second light-transmitting portion 320 are respectively located at both ends of the first light-transmitting portion 310. The radial dimensions of the third light-transmitting portion 330 and the second light-transmitting portion 320 can be larger than the radial dimensions of the first light-transmitting portion 310, so that the common cross-sectional schematic diagram of the first light-transmitting portion 310, the second light-transmitting portion 320 and the third light-transmitting portion 330 presents an I-shape. The first light-transmitting portion 310 is located in the mounting hole 111, and one of the second light-transmitting portion 320 and the third light-transmitting portion 330 is connected to the side of the wall portion 110 facing the outside of the shell 100, and the other is connected to the side of the wall portion 110 facing the inside of the shell 100, which can further improve the stability of the connection between the light-transmitting component 300 and the wall portion 110.

[0064] 7 , which is a third cross-sectional structural diagram of the battery cell 10 shown in FIG. 4 along the AA direction.

[0065] The wall portion 110 is provided with a mounting hole 111 extending through the wall portion 110 along its thickness. The light-transmitting component 300 further includes a light-transmitting body 340 and a sealing member 400. The sealing member 400 surrounds the light-transmitting body 340 and is embedded in the mounting hole 111 via the sealing member 400. The light-transmitting body 340 allows light to pass through, for example, light can be transmitted from one surface of the light-transmitting body 340 to the other surface. The sealing member 400 can be a sealing plastic and can be annular and fit over a portion of the outer periphery of the light-transmitting body 340, or can be sleeve-shaped and fit over the entire outer periphery of the light-transmitting body 340. The shape of the mounting hole 111 can match the shape of the seal 400, and the radial dimension of the mounting hole 111 can be slightly larger than the radial dimension of the seal 400, so that when the light-transmitting body 340 is inserted into the mounting hole 111 through the seal 400, the outer wall of the seal 400 and the inner wall of the mounting hole 111 are tightly fitted. Thus, the seal 400 is arranged around the circumference of the light-transmitting body 340, facilitating the insertion of the light-transmitting body 340 into the mounting hole 111 through the seal 400, improving the stability of the installation of the light-transmitting body 340 and the sealing effect of the mounting hole 111, and reducing the risk of electrolyte and the like within the battery cell 10 leaking through the mounting hole 111.

[0066] Furthermore, the sealing member 400 includes a sealing body 410 and a sealing connection portion 420. The sealing body 410 is provided with a mounting groove 430, the notch of which faces the exterior of the housing 100. The light-transmitting body 340 is disposed within the mounting groove 430, and the sealing connection portion 420 is connected to the side of the wall portion 110 facing the exterior of the housing 100. The sealing body 410 can be in the shape of a hollow column, with the hollow portion forming the mounting groove 430. The light-transmitting body 340 is disposed within the mounting groove 430 and is positioned by the bottom wall of the mounting groove 430. The shape of the mounting groove 430 can match that of the light-transmitting body 340, and the radial dimension of the mounting groove 430 can be slightly larger than the radial dimension of the light-transmitting body 340, so that the light-transmitting body 340 can be stably embedded within the mounting groove 430. The outer diameter of the sealing body 410 can be slightly smaller than the inner diameter of the mounting hole 111, so that when the light-transmitting body 340 is inserted into the mounting hole 111 through the sealing body 410, the outer wall of the sealing body 410 is tightly fitted with the inner wall of the mounting hole 111. The sealing connection portion 420 is connected to the side of the sealing body 410 that is close to the outside of the housing 100. The sealing connection portion 420 can be arranged around the outer periphery of the sealing body 410 and extend outward. When the sealing body 410 is inserted into the mounting hole 111, the sealing connection portion 420 can overlap the side of the wall 110 that faces the outside of the housing 100, so that the sealing member 400 and the wall 110 remain relatively fixed. For example, the sealing connection portion 420 can be fixedly connected to the wall 110 by bonding or welding. This can also simplify the fixing method of the light-transmitting component 300 through the sealing member 400, thereby improving installation efficiency.

[0067] Furthermore, a light-transmitting hole 411 is defined in the bottom wall of the mounting groove 430. The light-transmitting hole 411 connects the interior of the housing 100 and the mounting groove 430. The light-transmitting body 340 covers the light-transmitting hole 411. The signal light 211 is transmitted to the exterior of the housing 100 through the light-transmitting hole 411 and the light-transmitting body 340. The size of the light-transmitting hole 411 can be set according to actual conditions. The radial dimension of the light-transmitting hole 411 can be smaller than the radial dimension of the light-transmitting body 340 to allow the light-transmitting body 340 to be supported within the mounting groove 430. When the light-transmitting hole 411 is carried in the mounting groove 430, the light-transmitting body 340 can cover the light-transmitting hole 411. When the first optical communication element 210 emits the signal light 211, the signal light 211 can be incident on the light-transmitting body 340 from one side of the light-transmitting body 340 through the light-transmitting hole 411, and emitted from the other side of the light-transmitting body 340, so as to facilitate the transmission of the signal light 211 from the inside of the battery cell 10 to the outside of the battery cell 10 through the light-transmitting component 300, thereby improving the transmission stability of the signal light 211.

[0068] In some embodiments, the mounting hole 111 serves as an injection hole. The injection hole can be understood as a through-hole extending through the wall portion 110 , allowing electrolyte to be injected into the housing 100 during the production of the battery cell 10 . By directly using the injection hole as the mounting hole 111 , there is no need to create a separate mounting hole 111 in the wall portion 110 to accommodate the light-transmitting component 300 , simplifying the overall structure.

[0069] Referring to FIG. 8 , FIG. 8 is a fourth cross-sectional structural schematic diagram of the battery cell 10 shown in FIG. 4 along the AA direction.

[0070] The battery cell 10 also includes a lower plastic member 800, which is attached to the side of the wall portion 110 facing the interior of the housing 100. The lower plastic member 800 is provided with a receiving groove 810, with the notch of the receiving groove 810 facing the wall portion 110. The detection module 200 is disposed within the receiving groove 810. The lower plastic member 800 can be prefabricated from a single piece of plastic or assembled from various plastic components. The material of the lower plastic member 800 may include an insulating material. The lower plastic member 800 can provide insulation properties, improving electrical insulation between the interior of the housing 100 and the wall portion 110. In addition, the lower plastic member 800 can also secure and protect the electrode assembly 130 within the housing 100, reducing the risk of short circuits caused by displacement of components such as the electrode assembly 130 within the housing 100 during transportation and use of the battery cell 10, especially in vibration environments. The connection methods between the lower plastic member 800 and the wall portion 110 include, but are not limited to, welding, bonding, or snapping. Specifically, the lower plastic member 800 may be provided with a plurality of protrusions on the side facing the wall portion 110, and the wall portion 110 may be provided with holes corresponding to the protrusions. When the lower plastic member 800 is placed on the wall portion 110, the protrusions snap into the holes, thereby connecting the lower plastic member 800 and the wall portion 110. The notch of the receiving groove 810 faces the wall portion 110, so that when the lower plastic member 800 is placed on the wall portion 110, the detection module 200 can be completely installed in the receiving groove 810. The detection module 200 is supported by the lower plastic member 800, which can simplify the complexity of installing and fixing the detection module 200.

[0071] 9 , which is a fifth cross-sectional structural diagram of the battery cell 10 shown in FIG. 4 along the AA direction.

[0072] The battery cell 10 also includes an electrode column 140 and a first conductive member 600. The electrode column 140 is provided through the wall portion 110. The first conductive member 600 is located inside the outer shell 100 and is respectively connected to the electrode column 140 and the detection module 200, so that the electrode column 140 and the detection module 200 form a current loop. The electrode column 140 can be used to connect the battery cell 10 to an external circuit, serving as a charging and discharging interface for the battery cell 10. Specifically, the electrode column 140 is provided through the wall portion 110. The end of the electrode column 140 located outside the outer shell 100 can be electrically connected to an external device, and the end of the electrode column 140 located inside the outer shell 100 can be electrically connected to the tab of the electrode assembly 130 to form a current loop, so that the battery cell 10 can be charged or discharged through the electrode column 140. The first conductive member 600 can be a structure such as a wire or a conductive sheet. The first conductive member 600 can be connected to the detection module 200 and the electrode column 140 respectively, so that the electrode column 140 and the detection module 200 can form a current loop through the first conductive member 600, and then the detection module 200 can be powered through the electrode column 140, thereby reducing the difficulty of powering the detection module 200.

[0073] Furthermore, the electrode column 140 also includes a positive electrode column 141 and a negative electrode column 142, which are respectively provided through the wall portion 110. The detection module 200 is provided between the positive electrode column 141 and the negative electrode column 142. The first conductive member 600 includes two first wires 610, one first wire 610 connecting the positive electrode column 141 and the detection module 200, and the other first wire 610 connecting the negative electrode column 142 and the detection module 200. The detection module 200, the positive electrode column 141, and the negative electrode column 142 can be located on the same straight line, the detection module 200 can be located in the middle of the positive electrode column 141 and the negative electrode column 142, or the detection module 200 can be provided closer to the negative electrode column 142 or closer to the positive electrode column 141. This can simultaneously reduce the wiring harness length of the two first wires 610, simplify the complexity of the wiring harness layout, and reduce the difficulty of powering the detection module 200.

[0074] In some embodiments, the battery cell 10 further includes a data processing module 500, which is disposed outside the housing 100. The data processing module 500 includes a second optical communication element 510 and a data processing element 520, which are interconnected. The second optical communication element 510 is configured to receive the signal light 211, and the data processing element 520 is configured to receive data generated based on the signal light 211. The data processing module 500 can be fixedly mounted on the surface of the wall portion 110 facing the exterior of the housing 100. The second optical communication element 510 includes, but is not limited to, an infrared light communication element and can be configured to receive or emit the signal light 211. The signal light 211 emitted by the first optical communication element 210 passes through the light-transmitting component 300 from within the housing 100 to the exterior of the housing 100, where it is received by the second optical communication element 510. In some embodiments, after receiving the signal light 211, the second optical communication element 510 can convert the signal light 211 into battery cell 10 status data, which is then transmitted to the data processing element 520, allowing the data processing element 520 to receive the data generated based on the signal light 211. When it is necessary to control the detection module 200 for data collection, the second optical communication element 510 can emit light to the first optical communication element 210. The first optical communication element 210 then demodulates the light to obtain a control signal, allowing the detection element 220 to detect the status data of the battery cell 10 based on the control signal. As such, the data processing module 500 is disposed outside the housing 100, allowing the second optical communication element 510 to receive the signal light 211 outside the housing 100 and receive the battery cell 10 status data through the data processing element 520. This allows the transmission and reception of battery cell 10 data via optical signal transmission. Compared to wired transmission, this can further reduce the complexity of the wiring harness in the battery cell 10 and eliminate the need for additional through-holes in the housing 100 for routing the wiring harness, thus reducing overall processing difficulty.

[0075] Furthermore, the first optical communication element 210, the light-transmitting component 300, and the second optical communication element 510 are sequentially arranged in the thickness direction of the wall portion 110. That is, the first optical communication element 210, the light-transmitting component 300, and the second optical communication element 510 are all located in the thickness direction of the wall portion 110, so that the second optical communication element 510 can receive the signal light 211. This can shorten the transmission path of the signal light 211, improve the reception efficiency of the signal light 211, and thereby improve the overall data transmission efficiency.

[0076] In some embodiments, the battery cell 10 further includes an electrode column 140 and a second conductive member 700. The electrode column 140 is disposed through the wall portion 110. The second conductive member 700 is located outside the housing 100 and is respectively connected to the electrode column 140 and the data processing module 500, so that the electrode column 140 and the data processing module 500 form a current loop. The electrode column 140 can be used to connect the battery cell 10 to an external circuit, serving as a charging and discharging interface for the battery cell 10. Specifically, the electrode column 140 is disposed through the wall portion 110. The end of the electrode column 140 located outside the housing 100 can be electrically connected to an external device, and the end of the electrode column 140 located inside the housing 100 can be electrically connected to the tab of the electrode assembly 130 to form a current loop, so that the battery cell 10 can be charged or discharged through the electrode column 140. The second conductive member 700 can be a structure such as a wire or a conductive sheet. The second conductive member 700 can be connected to the data processing module 500 and the electrode column 140 respectively, so that the electrode column 140 and the data processing module 500 can form a current loop through the second conductive member 700, and then the data processing module 500 can be powered through the electrode column 140, thereby reducing the difficulty of powering the data processing module 500.

[0077] Furthermore, the electrode column 140 also includes a positive electrode column 141 and a negative electrode column 142, the positive electrode column 141 and the negative electrode column 142 are respectively passed through the wall 110, the data processing module 500 is arranged between the positive electrode column 141 and the negative electrode column 142, and the second conductive member 700 includes two second wires 710, one second wire 710 connects the positive electrode column 141 and the data processing module 500, and the other second wire 710 connects the negative electrode column 142 and the data processing module 500. The data processing module 500, the positive pole 141 and the negative pole 142 can be located on the same straight line, the data processing module 500 can be located in the middle position between the positive pole 141 and the negative pole 142, or the data processing module 500 can be arranged closer to the negative pole 142 or closer to the positive pole 141, thereby reducing the wiring harness length of the two second wires 710 at the same time, simplifying the complexity of the wiring harness layout, and reducing the difficulty of powering the data processing module 500.

[0078] In some embodiments, the data processing module 500 further includes a wireless communication element 530, which is connected to the data processing element 520 and is used to transmit the data generated by the signal light 211 to an external device. The wireless communication element 530 is communicatively connected to the data processing element 520, which facilitates data transmission between the data processing element 520 and the wireless communication element 530. The wireless communication element 530 can communicate wirelessly with the external device, where the wireless communication method may include but is not limited to Bluetooth, Wi-Fi, near-field communication (NFC), etc. The external device may include but is not limited to a battery management system or an in-vehicle central control system, etc. After the wireless communication element 530 receives the data generated by the signal light 211, it can send relevant data to the external device via wireless transmission, or receive relevant instructions issued by the external device via wireless transmission, etc. Thus, the data generated by the signal light 211 can be transmitted to the external device via the wireless communication element 530, which can reduce the complexity of the wiring harness compared to the wired transmission method, making the entire communication method more concise.

[0079] To sum up, the status data of the battery cell 10 is detected by the built-in detection element 220, and the first optical communication element 210 transmits the signal light 211 generated according to the status data to the outside of the shell 100 through the light-transmitting component 300, so as to transmit the battery status data to the outside of the battery cell 10 by wireless transmission. Compared with the wired transmission method, it can further reduce the complexity of the wiring harness in the battery cell 10, and there is no need to open an additional through hole on the shell 100 for passing the wiring harness, thereby reducing the overall processing difficulty.

[0080] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0081] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0082] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0083] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0084] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0085] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: The battery cell comprises: The housing includes a wall portion, wherein the wall portion includes a light-transmitting component; A detection module is arranged inside the shell, and the detection module includes a detection element and a first optical communication element. The detection element is connected to the first optical communication element. The detection element is used to detect the status data of the battery cell, and the first optical communication element is used to transmit the signal light generated according to the status data to the outside of the shell through the light-transmitting component.

2. The battery cell according to claim 1, wherein: The light-transmitting component penetrates opposite surfaces of the wall portion in the thickness direction of the wall portion.

3. The battery cell according to claim 2, characterized in that: The wall portion is provided with a mounting hole passing through the wall portion along the thickness direction, and the light-transmitting component includes a first light-transmitting portion and a second light-transmitting portion connected to each other, the first light-transmitting portion is embedded in the mounting hole, and the second light-transmitting portion is connected to the side of the wall portion facing the outside of the shell, or the second light-transmitting portion is connected to the side of the wall portion facing the inside of the shell.

4. The battery cell according to claim 3, characterized in that The light-transmitting component also includes a third light-transmitting portion, the second light-transmitting portion and the third light-transmitting portion are respectively connected to both ends of the first light-transmitting portion in the thickness direction, one of the second light-transmitting portion and the third light-transmitting portion is connected to the side of the wall portion facing the outside of the shell, and the other is connected to the side of the wall portion facing the inside of the shell.

5. The battery cell according to claim 1, characterized in that The wall portion is provided with a mounting hole penetrating the wall portion along the thickness direction of the wall portion. The light-transmitting component further includes a light-transmitting body and a sealing member. The sealing member is arranged around the circumference of the light-transmitting body, and the light-transmitting body is embedded in the mounting hole through the sealing member.

6. The battery cell according to claim 5, characterized in that The sealing member includes a sealing main body and a sealing connection part. The sealing main body is provided with a mounting groove, the notch of the mounting groove faces the outside of the shell, the light-transmitting body is arranged in the mounting groove, and the sealing connection part is connected to the side of the wall facing the outside of the shell.

7. The battery cell according to claim 6, characterized in that The bottom wall of the mounting groove is provided with a light-transmitting hole, which connects the interior of the housing and the mounting groove. The light-transmitting body covers the light-transmitting hole, and the signal light is transmitted to the outside of the housing through the light-transmitting hole and the light-transmitting body.

8. The battery cell according to any one of claims 3 to 7, characterized in that: The mounting hole is a liquid injection hole.

9. The battery cell according to any one of claims 1 to 8, characterized in that: The battery cell further includes an electrode column and a first conductive member. The electrode column is provided through the wall portion. The first conductive member is located inside the shell and is respectively connected to the electrode column and the detection module to form a current loop.

10. The battery cell according to claim 9, characterized in that The electrode column also includes a positive electrode column and a negative electrode column, the positive electrode column and the negative electrode column are respectively passed through the wall portion, the detection module is arranged between the positive electrode column and the negative electrode column, and the first conductive member includes two first wires, one first wire connects the positive electrode column and the detection module, and the other first wire connects the negative electrode column and the detection module.

11. The battery cell according to any one of claims 1 to 10, characterized in that: The battery cell further includes a lower plastic part, which is fitted on a side of the wall portion facing the interior of the housing. The lower plastic part is provided with a receiving groove, the notch of the receiving groove faces the wall portion, and the detection module is arranged in the receiving groove.

12. The battery cell according to any one of claims 1 to 11, characterized in that: The battery cell also includes a data processing module, which is arranged outside the shell. The data processing module includes a second optical communication element and a data processing element connected to each other. The second optical communication element is used to receive the signal light, and the data processing element is used to receive data generated according to the signal light.

13. The battery cell according to claim 12, characterized in that: The first optical communication element, the light-transmitting member, and the second optical communication element are arranged in this order in the thickness direction of the wall portion.

14. The battery cell according to claim 12 or 13, characterized in that: The battery cell further includes an electrode column and a second conductive member. The electrode column is passed through the wall portion. The second conductive member is located outside the shell and is respectively connected to the electrode column and the data processing module to form a current loop.

15. The battery cell according to claim 14, characterized in that The electrode column also includes a positive electrode column and a negative electrode column, the positive electrode column and the negative electrode column are respectively passed through the wall portion, the data processing module is arranged between the positive electrode column and the negative electrode column, and the second conductive member includes two second wires, one second wire connects the positive electrode column and the data processing module, and the other second wire connects the negative electrode column and the data processing module.

16. The battery cell according to any one of claims 12 to 15, characterized in that: The data processing module further includes a wireless communication element, which is connected to the data processing element and is used to transmit the data generated by the signal light to an external device.

17. The battery cell according to any one of claims 1 to 16, characterized in that: The detection element includes one or more of a temperature sensor, an air pressure sensor, a voltage sensor and an impedance sensor.

18. A battery, characterized in that: The battery comprises the battery cell according to any one of claims 1 to 17.

19. An electrical device, characterized in that: The electric device comprises the battery as claimed in claim 18.

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