Battery cells, batteries, and electrical devices
Patent Information
- Application Number
- KR1020267025692
- Authority / Receiving Office
- KR · KR
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-02
- Filing Date
- 2024-08-09
- Publication Date
- 2026-09-14
Smart Images
Figure PCT00005_ABST
Abstract
Description
Technology Field
[0001] This application claims priority to a Chinese patent application filed on February 2, 2024, with application number 2024202671584 and title of invention "battery cell, battery and electric device", the entire contents of which are incorporated into this application by reference.
[0002] (Technology field)
[0003] This application relates to the field of battery technology, and in particular to battery cells, batteries, and electric devices. Background Technology
[0004] As energy conservation and emission reduction are key to sustainable development, they facilitate the adjustment of the energy structure and drive the advancement and application of battery technology. The core of battery technology development lies in electrochemical energy storage technology, which is widely applied in portable electronics, electric vehicles, and energy storage systems due to its advantages, such as high energy density, excellent circulation capacity, high operating voltage, eco-friendliness, and low self-discharge rate.
[0005] A battery generally includes one or more battery cells, and during use, the battery cell can monitor the operating status of the battery cell through a built-in detection module and then transmit the generated operating status to the outside of the battery cell via a wired transmission method. However, the wired transmission method makes the wiring harness generally complex and requires additional processing of the battery cell to create a structure suitable for the wiring harness, resulting in a relatively high overall processing difficulty.
[0006] The main objective of the present application is to provide a battery cell, a battery, and an electric device to solve the aforementioned technical problems existing in the prior art.
[0007] To solve the above-mentioned problem, the present application provides a battery cell, wherein the battery cell comprises a housing and a detection module, the housing comprises a wall portion, and the wall portion comprises a light-emitting component; the detection module is installed inside the housing, and the detection module comprises 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 state data of the battery cell, and the first optical communication element is used to transmit signal light generated according to the state data to the outside of the housing through the light-emitting component. Thus, the state data of the battery cell is detected through the built-in detection element, and the signal light generated according to the state data by the first optical communication element is transmitted to the outside of the housing through the light-emitting component, thereby transmitting the state data of the battery to the outside of the battery cell via a wireless transmission method, and compared to a wired transmission method, the complexity of the wiring harness inside the battery cell can be further reduced, and there is no need to separately open a through hole to pass the wiring harness through the housing, thereby lowering the overall difficulty of processing.
[0008] In some embodiments, the light-transmitting component penetrates the opposite surfaces of the wall in the thickness direction of the wall. Thus, when the light-transmitting component penetrates the opposite surfaces of the wall in the thickness direction of the wall, it becomes easier for signal light to be transmitted from inside the battery cell to outside the battery cell through the light-transmitting component, and the transmission efficiency of the signal light can be improved.
[0009] In some embodiments, a mounting hole is provided in the wall that penetrates the wall along the thickness direction, and the light-emitting component includes a first light-emitting part and a second light-emitting part connected to each other. The first light-emitting part is fitted into the mounting hole, and the second light-emitting part is connected to one side of the wall facing the outside of the housing, or the second light-emitting part is connected to one side of the wall facing the inside of the housing. Thus, the second light-emitting part is connected to one side of the wall facing the outside of the housing or one side of the wall facing the inside of the housing, making it easy to maintain a state of relative fixation to the housing through the second light-emitting part, and the first light-emitting part is fitted into the mounting hole, allowing mounting and position limitation of the first light-emitting part to be performed through the mounting hole, thereby improving the stability of the light-emitting component connection.
[0010] In some embodiments, the light-transmitting component also includes a third light-transmitting portion, and the second light-transmitting portion and the third light-transmitting portion are each 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 one side of the wall portion facing the outside of the housing, and the other is connected to one side of the wall portion facing the inside of the housing. By connecting the third light-transmitting portion and the second light-transmitting portion to each other on 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, a mounting hole is provided in the wall that penetrates the wall along the thickness direction of the wall, and the light-transmitting component also includes a light-transmitting body and a sealing member, wherein the sealing member is installed surrounding the periphery of the light-transmitting body, and the light-transmitting body is fitted into the mounting hole through the sealing member. Thus, since the sealing member is installed surrounding the periphery of the light-transmitting body, it is easy for the light-transmitting body to be fitted into the mounting hole through the sealing member, thereby improving the stability of mounting the light-transmitting body and the sealing effect on the mounting hole, and mitigating the risk of leakage of electrolyte, etc., from inside the battery cell through the mounting hole.
[0012] In some embodiments, the sealing member includes a sealing body and a sealing connection, and a mounting groove is installed in the sealing body, the notch of the mounting groove faces outward toward the housing, the light-transmitting body is installed within the mounting groove, and the sealing connection is connected to one side of the wall facing outward toward the housing. Thus, when the notch of the mounting groove faces outward toward the housing and the light-transmitting body is installed within the mounting groove, it is easy to mount and fix the light-transmitting body through the sealing body, and the sealing connection is connected to one side of the wall facing outward toward the housing, thereby simplifying the method of fixing the light-transmitting component through the sealing member and improving mounting efficiency.
[0013] In some embodiments, a light-transmitting hole is installed in the lower wall of the mounting groove, the light-transmitting hole communicates with the inside of the housing and the mounting groove, a light-transmitting body covers the light-transmitting hole, and signal light is transmitted to the outside of the housing through the light-transmitting hole and the light-transmitting body. Thus, by opening a light-transmitting hole in the lower wall of the mounting groove and having a light-transmitting body cover the light-transmitting hole, it becomes easier for signal light to be transmitted from inside the battery cell to the outside of the battery cell through the light-transmitting component, and the stability of signal light transmission can be improved.
[0014] In some embodiments, the mounting hole is a liquid injection hole. Thus, by using the liquid injection hole as a mounting hole, there is no need to open a separate mounting hole in the wall to accommodate the light-transmitting component, and the overall structure can be simplified.
[0015] In some embodiments, the battery cell also includes an electrode column and a first conductive member, wherein the electrode column penetrates a wall and the first conductive member is located inside a housing and is connected to the electrode column and a detection module, respectively, so that the electrode column and the detection module form a current circuit. Thus, when a current circuit is formed between the detection module and the electrode column through the first conductive member, it is easy to supply power to the detection module through the electrode column, thereby reducing the difficulty of power supply to the detection module.
[0016] In some embodiments, the electrode column also includes an anode column and a cathode column, and the anode column and the cathode column each penetrate a wall, and a detection module is installed between the anode column and the cathode column, and a first conductive member includes two first conductors, one first conductor connecting the anode column and the detection module, and the other first conductor connecting the cathode column and the detection module. Thus, the detection module is installed between the anode column and the cathode column, thereby simultaneously reducing the length of the wiring harness of the two first conductors, simplifying the complexity of the wiring harness arrangement, and lowering the difficulty of power supply to the detection module.
[0017] In some embodiments, the battery cell also includes a lower plastic member, the lower plastic member is adhesively installed on one side of a wall facing the inside of the housing, a storage groove is installed in the lower plastic member, the notch of the storage groove faces the wall, and a detection module is installed within the storage groove. Thus, by adhesively installing the lower plastic member on one side of a wall facing the inside of the housing, electrical insulation between the inside of the housing and the wall can be achieved through the lower plastic member, and by installing a storage groove in the lower plastic member to install the detection module within the storage groove, the complexity of mounting and fixing the detection module can be simplified.
[0018] In some embodiments, the battery cell also includes a data processing module, the data processing module is installed outside the housing, and 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 signal light, and the data processing element is used to receive data generated according to the signal light. Thus, when the data processing module is installed outside the housing, the second optical communication element is easy to receive signal light from outside the housing, and by receiving and obtaining the state data of the battery cell through the data processing element, the transmission and reception of battery cell data is implemented through an optical signal transmission method, and compared to a wired transmission method, the complexity of the wiring harness within the battery cell can be further reduced, and there is no need to separately open a through hole to pass the wiring harness through the housing, thereby lowering the overall processing difficulty.
[0019] In some embodiments, the first optical communication element, the light-transmitting component, and the second optical communication element are installed sequentially in the thickness direction of the wall. Thus, when the first optical communication element, the light-transmitting component, and the second optical communication element are installed sequentially in the thickness direction of the wall, the transmission path of the signal light can be shortened, the reception efficiency of the signal light can be improved, and furthermore, the overall data transmission efficiency can be improved.
[0020] In some embodiments, the battery cell also includes an electrode post and a second conductive member, wherein the electrode post penetrates a wall and the second conductive member is located outside the housing and is connected to the electrode post and a data processing module, respectively, so that the electrode post and the data processing module form a current circuit. Thus, when a current circuit is formed between the data processing module and the electrode post through the second conductive member, it is easy to supply power to the data processing module through the electrode post, and the difficulty of power supply to the data processing module can be reduced.
[0021] In some embodiments, the electrode column also includes an anode column and a cathode column, and the anode column and the cathode column each penetrate a wall, and a data processing module is installed between the anode column and the cathode column, and a second conductive member includes two second conductors, one second conductor connecting the anode column and the data processing module, and the other second conductor connecting the cathode column and the data processing module. Thus, when the data processing module is installed between the anode column and the cathode column, the length of the wiring harness of the two second conductors is simultaneously reduced, the complexity of the wiring harness arrangement is simplified, and the difficulty of power supply to the data processing module can be lowered.
[0022] In some embodiments, the data processing module also includes a wireless communication element, the wireless communication element is connected to the data processing element, and the wireless communication element is used to transmit data generated by the signal light to an external device. Thus, data generated by the signal light can be transmitted to an external device through the wireless communication element, thereby reducing the complexity of the wiring harness and making the overall communication method more concise compared to a wired transmission method.
[0023] In some embodiments, the detection element includes one or more of a temperature sensor, a barometric pressure sensor, a voltage sensor, and an impedance sensor. Thus, if the detection element includes one or more of a temperature sensor, a barometric pressure sensor, a voltage sensor, and an impedance sensor, it is advantageous for specifically detecting the operating state of a battery cell and facilitates specific management of the battery cell.
[0024] To solve the above-mentioned problem, the present application provides a battery, and the battery includes the above-mentioned battery cell.
[0025] To solve the above-mentioned problem, the present application provides an electric device, and the electric device includes a battery as described above. Brief explanation of the drawing
[0026] In order to explain the embodiments of the present application or the technical methods of the prior art more clearly, the drawings to be used in the embodiments will be briefly introduced below. The drawings described below are merely some embodiments of the present application, and it is obvious to those skilled in the art that other drawings can be obtained from these drawings without any creative labor. FIG. 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application; FIG. 2 is a schematic diagram of the exploded structure of a battery according to one or more embodiments of the present application; FIG. 3 is an exploded structural schematic diagram of a battery cell according to one or more embodiments of the present application; FIG. 4 is a schematic diagram of the top surface structure of the battery cell shown in FIG. 3; FIG. 5 is a first cross-sectional structural schematic diagram along the AA direction of the battery cell illustrated in FIG. 4; FIG. 6 is a second cross-sectional structural schematic diagram along the AA direction of the battery cell illustrated in FIG. 4; FIG. 7 is a schematic diagram of a third cross-sectional structure along the AA direction of the battery cell illustrated in FIG. 4; FIG. 8 is a schematic diagram of a fourth cross-sectional structure along the AA direction of the battery cell illustrated in FIG. 4; FIG. 9 is a schematic diagram of the fifth cross-sectional structure along the AA direction of the battery cell shown in FIG. 4. Specific details for implementing the invention
[0027] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the attached drawings. The following embodiments are provided merely as examples to more clearly explain the technical solution of the present application and are not intended to limit the scope of protection of the present application.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art; terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit the application; and the terms “comprising” and “having,” and any variations thereof, in the specification, claims, and description of the drawings above are intended to cover non-exclusive inclusion.
[0029] Currently, considering the development of the market landscape, the applications of batteries are becoming increasingly widespread. Batteries are not only applied to energy storage power systems such as hydroelectric, thermal, wind, and solar power plants, but are also widely utilized in various fields including electric transportation (such as electric bicycles, motorcycles, and vehicles), military equipment, and aerospace. As the application areas of batteries continue to expand, market demand is also steadily increasing.
[0030] Batteries mentioned in the industry can be classified into primary batteries and rechargeable batteries depending on whether they are rechargeable. Primary batteries are also referred to as "disposable" batteries or nuclear batteries because they cannot be recharged and must be discarded once their electrical capacity is depleted. Rechargeable batteries are also referred to as secondary batteries, second-class batteries, or storage batteries. The manufacturing materials and processes of rechargeable batteries differ from those of primary batteries; they have the advantage of being reusable multiple times after charging and having a higher output current load capacity than most primary batteries. Currently, common types of rechargeable batteries include lead-acid batteries, nickel-hydrogen batteries, and lithium-ion batteries. Lithium-ion batteries have advantages such as lightweight design, high capacity (1.5 to 2 times that of nickel-hydrogen batteries of the same weight), and the absence of a memory effect. Because of their very low self-discharge rate, they are still widely applied despite their relatively high cost. Lithium-ion batteries are currently widely applied in pure electric vehicles and hybrid vehicles; however, while these batteries have a relatively small capacity, they offer relatively high output, charging current, and a long lifespan, whereas their cost is relatively high.
[0031] The term "battery" as described in the embodiments of this application refers to a rechargeable battery or a primary battery. Below, the embodiments disclosed in this application will be described primarily using lithium-ion batteries as examples. It should be understood that the embodiments disclosed in this application may be applied to any other suitable type of rechargeable battery. The battery mentioned in the embodiments disclosed in this application may be applied directly or indirectly to a suitable device to supply power to said device.
[0032] The present application provides an electric device, which may include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric vehicles, ships, space equipment, etc. Herein, electric toys may include stationary or mobile electric toys such as, for example, game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, and space equipment may include airplanes, rockets, space shuttles, and spacecraft. Herein, the electric device may include a battery, and the electric device may implement a corresponding function by providing electrical energy through the battery.
[0033] The present application also provides an electric vehicle, and the electric vehicle may include a battery.
[0034] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.
[0035] The vehicle (1) may be a fuel vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery (2) is installed inside the vehicle (1), and the battery (2) may be installed in the bottom, head, or tail section of the vehicle (1). The battery (2) may be used to supply power to the vehicle (1), and for example, the battery (2) may be used as the working power source for the vehicle (1). The vehicle (1) may also include a controller (3) and a motor (4), and the controller (3) is used to control the battery (2) to supply power to the motor (4), and is used, for example, to supply the working power required for the operation, navigation, and driving of the vehicle (1).
[0036] In some embodiments of the present application, the battery (2) can be used not only as a working power source for the vehicle (1) but also as a driving power source for the vehicle (1), and provides driving power to the vehicle (1) by replacing or partially replacing fuel or natural gas.
[0037] To improve the performance of an electrical device, the present application also provides a battery, and with reference to FIG. 2, FIG. 2 is a schematic diagram of the exploded structure of a battery according to one or more embodiments of the present application.
[0038] The shape of the battery may include, but is not limited to, a rectangular, cylindrical, or any other shape.
[0039] In some embodiments, the battery (2) may include a case (20) and a battery cell (10), and the battery cell (10) is accommodated within the case (20). The case (20) is used to provide a receiving space for the battery cell (10), and the case (20) may have various structures. In some embodiments, the case (20) may include a first part (21) and a second part (22), and the first part (21) and the second part (22) are covered and joined together, and the first part (21) and the second part (22) jointly form a limited receiving space used to accommodate the battery cell (10). The second part (22) may be a hollow structure with one end open, and the first part (21) may be a plate-shaped structure, and the first part (21) is placed over and joined to the opening side of the second part (22) so that the first part (21) and the second part (22) jointly form a limited receiving space; the first part (21) and the second part (22) may both be hollow structures with one end open, and the opening side of the first part (21) is placed over and joined to the opening side of the second part (22).
[0040] In the battery (2), the battery cells (10) may be multiple, and the multiple battery cells (10) may be connected in series, parallel, or a combination of series and parallel. A combination of series and parallel indicates that some of the multiple battery cells (10) are connected in series and others are connected in parallel. The multiple battery cells (10) may be directly connected in series, parallel, or a combination of series and parallel, and then an integrated body composed of the multiple battery cells (10) may be housed within a case (20); of course, the battery (2) may first be configured in the form of a battery module by connecting the multiple battery cells (10) in series, parallel, or a combination of series and parallel, and then the multiple battery modules may be connected again in series, parallel, or a combination of series and parallel to form a single integrated body, which may be housed within the case (20). The battery (2) may also include other structures, for example, the battery (2) may also include a busbar component for implementing electrical connections between the multiple battery cells (10).
[0041] The manufacturing method of the battery cell (10) includes a stacking method and a winding method, that is, the battery cell (10) is classified into a stacked battery and a wound battery. The stacked battery has a uniform current collection effect, low internal battery resistance, and high specific power output, but to increase precision, the requirements for mold precision are extremely high, and the device investment cost is high, as well as the process being relatively complex and the production efficiency being low. The wound battery is simple to manufacture, the requirements for device precision in the electrode manufacturing and assembly processes are average, the production efficiency is high, and the cost is relatively low. In terms of performance, the wound battery possesses excellent high and low temperature performance, a very fast charging speed, an ultra-long lifespan, a stable high output voltage, a robust structure, and strong vibration resistance.
[0042] In a related embodiment, the battery cell monitors the operating status of the battery cell through a built-in detection module during use and then transmits the generated operating status to the outside of the battery cell via a wired transmission method, but the wired transmission method makes the wiring harness generally complex and requires additional processing of a structure suitable for the wiring harness on the battery cell, so the overall processing difficulty is relatively high.
[0043] To solve technical problems existing in related technologies, the present application provides a battery cell, wherein a light-transmitting component for light transmission is provided in the housing of the battery cell, and a detection module is embedded in the battery cell, and internal state data of the battery cell is detected through the detection module, and the internal state data is converted into signal light through the detection module, and the signal light is transmitted from inside the housing to outside the housing through the light-transmitting component, thereby replacing the method of transmitting state data from inside the housing to outside the housing using a conventional wired method.
[0044] Specifically, with reference to FIGS. 3 to 5, FIG. 3 is an exploded structural schematic diagram of a battery cell according to one or more embodiments of the present application, FIG. 4 is a top structural schematic diagram of the battery cell shown in FIG. 3, and FIG. 5 is a first cross-sectional structural schematic diagram along the AA direction of the battery cell shown in FIG. 4.
[0045] A battery cell (10) includes a housing (100) and a detection module (200), the housing (100) includes a wall portion (110), the wall portion (110) includes a light-emitting component (300); the detection module (200) is installed inside the housing (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 state data of the battery cell (10), and the first optical communication element (210) is used to transmit a signal light (211) generated according to the state data to the outside of the housing (100) through the light-emitting component (300).
[0046] The wall portion (110) may be any one side wall of the housing (100). For example, if the housing (100) is rectangular, all portions corresponding to the six sides of the rectangular housing (100) may be used as the wall portion (110) of this embodiment. If the housing (100) includes an end cover and a housing body (120), the wall portion (110) may be the end cover. Specifically, the end cover refers to a component that is placed over and coupled to the opening of the housing body (120) to isolate the internal environment of the battery cell (10) from the external environment. Without limitation, the shape of the end cover is compatible with the shape of the housing body (120) and fits into the housing body (120). Optionally, the end cover may be manufactured from a material having a specific hardness and strength (e.g., aluminum alloy), so that the end cover does not easily deform when subjected to compression and impact, thereby allowing the battery cell (10) to have greater structural strength and improving safety performance. In some embodiments, the end cover may also be equipped with an explosion-proof member used to release internal pressure when the internal pressure or temperature of the battery cell (10) reaches a critical value. The material of the end cover may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application are not particularly limited thereto. The housing body (120) is an assembly used to form an internal environment of the battery cell (10) by fitting it to the end cover, wherein the formed internal environment may be used to accommodate an electrode assembly (130), an electrolyte, and other components. The housing body (120) and the end cover may be independent parts, and an opening may be installed in the housing body (120) so that the end cover is fitted over the opening at the opening position and joined, thereby forming the internal environment of the battery cell (10).Without limitation, the end cover and the housing body (120) may be integrated. Specifically, the end cover and the housing body (120) may first form a common connection surface before other parts are inserted into the housing, and when the interior of the housing body (120) needs to be packaged, the end cover may be placed over the housing body (120) to be combined. The battery cell (10) may also include an electrode assembly (130), and the electrode assembly (130) is a part that causes an electrochemical reaction in the battery cell (10). One or more electrode assemblies (130) may be included within the housing body (120). The electrode assembly (130) is mainly formed by winding or stacking positive electrode pieces and negative electrode pieces, and typically a separating member is installed between the positive electrode piece and the negative electrode piece. The parts of the positive electrode piece and the negative electrode piece that have active material constitute the main body of the electrode assembly (130), and the parts of the positive electrode piece and the negative electrode piece that do not have active material each constitute an electrode tab. The positive and negative tabs may be located together at one end of the main body or at each end of the main body. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form a current circuit.
[0047] The light-transmitting component (300) may allow the passage of light, for example, light may be transmitted from one side surface of the light-transmitting component (300) to the other side surface. The light-transmitting component (300) may be in any shape, and the light-transmitting component (300) may be fitted into the wall portion (110) of the housing (100), or the entire wall portion (110) may be used as the light-transmitting component (300), etc. The light-transmitting component (300) may 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) may be located entirely inside the housing (100), and the detection module (200) includes a detection element (220) and a first optical communication element (210). The detection element (220) may be used to detect state data of the battery cell (10). For example, the state data may include, but is not limited to, temperature data, atmospheric pressure data, voltage data and / or impedance data. The first optical communication element (210) may include, but is not limited to, an infrared communication element. The first optical communication element (210) may be used to receive or emit a signal light (211), and the signal light (211) may pass through the light-emitting component (300) inside the housing (100) to the outside of the housing (100). In some embodiments, the detection element (220) detects the state data of the battery cell (10) and then converts the state data into a signal light (211) through the detection element (220) and transmits the signal light (211) to the outside of the housing (100) through the light-transmitting component (300) by the first optical communication element (210); or the detection element (220) detects the state data of the battery cell (10) and then transmits the state data to the first optical communication element (210), and the first optical communication element (210) converts the state data into a signal light (211) and transmits the signal light (211) to the outside of the housing (100) through the light-transmitting component (300).Here, the signal light (211) may be emitted directly to the light-emitting component (300) and emitted directly through the light-emitting component (300), or another light-guiding element may be installed, and the light-guiding element is installed in the light path of the signal light (211) to receive the signal light (211) and guide it to the light-emitting component (300). After the signal light (211) is transmitted outside the housing (100), the signal light (211) is received and demodulated through another module, so that the status data of the battery cell (10) can be obtained wirelessly.
[0048] Through the above-described embodiment, the state data of the battery cell (10) is detected through the built-in detection element (220), and the first optical communication element (210) transmits the signal light (211) generated according to the state data to the outside of the housing (100) through the light-emitting component (300), thereby transmitting the state data of the battery to the outside of the battery cell (10) through a wireless transmission method. Compared to a wired transmission method, the complexity of the wiring harness inside the battery cell (10) can be further reduced, and there is no need to separately open a through hole to pass the wiring harness through the housing (100), thereby lowering the overall processing difficulty.
[0049] In some embodiments, the detection element (220) includes one or more of a temperature sensor, a pressure sensor, a voltage sensor, and an impedance sensor. Thus, if the detection element (220) includes one or more of a temperature sensor, a pressure sensor, a voltage sensor, and an impedance sensor, it is advantageous for specifically detecting the operating state of the battery cell (10) and facilitating specific management of the battery cell (10).
[0050] Additionally, the light-emitting part (300) penetrates the opposite surfaces of the wall (110) in the thickness direction of the wall (110). The light-emitting component (300) may be of any shape, for example, the light-emitting component (300) may be cylindrical, prismatic, truncated, conical, inclined, etc., and the light-emitting component (300) penetrates the mutually opposite surfaces of the wall (110) in the thickness direction of the wall (110), that is, the light-emitting component (300) is simultaneously exposed to the inside of the housing (100) and the outside of the housing (100). When a signal light (211) is incident on the light-emitting component (300) from inside the housing (100), it can be emitted to the outside of the housing (100) through the light-emitting component (300), thereby transmitting the state data of the battery cell (10) from inside the housing (100) to the outside of the housing (100) via a wireless transmission method, and improving the transmission efficiency of the signal light (211).
[0051] Referring to FIG. 6, FIG. 6 is a structural schematic diagram of a second cross-section along the AA direction of the battery cell (10) shown in FIG. 4.
[0052] A mounting hole (111) is installed in the wall (110) along the thickness direction and penetrating the wall (110). The light-emitting component (300) includes a first light-emitting part (310) and a second light-emitting part (320) that are connected to each other. The first light-emitting part (310) is fitted into the mounting hole (111), and the second light-emitting part (320) is connected to one side of the wall (110) facing the outside of the housing (100), or the second light-emitting part (320) is connected to one side of the wall (110) facing the inside of the housing (100). The first light-emitting part (310) and the second light-emitting part (320) may be shaped like a column, large, or conical shape, and the shape of the mounting hole (111) may match the shape of the first light-emitting part (310). The radial size of the mounting hole (111) may be slightly larger than the radial size of the first light-emitting part (310), so that the first light-emitting part (310) is inserted into the mounting hole (111) and the outer wall of the first light-emitting part (310) and the inner wall of the mounting hole (111) are closely bonded. The radial size of the second light-emitting part (320) may be larger than the radial size of the first light-emitting part (310), and when the first light-emitting part (310) is inserted into the mounting hole (111), the second light-emitting part (320) may overlap one side of the wall part (110) facing the outside of the housing (100) or may overlap one side of the wall part (110) facing the inside of the housing (100), so that the light-emitting part (300) and the wall part (110) are maintained in a relatively fixed state, and for example, the second light-emitting part (320) may be fixedly connected to the wall part (110) through methods such as bonding, welding, or fusion.
[0053] Additionally, the light-emitting component (300) also includes a third light-emitting section (330), and the second light-emitting section (320) and the third light-emitting section (330) are each connected to both ends of the first light-emitting section (310) in the thickness direction, and one of the second light-emitting section (320) and the third light-emitting section (330) is connected to one side of the wall section (110) facing the outside of the housing (100), and the other is connected to one side of the wall section (110) facing the inside of the housing (100). The third light-emitting part (330) and the second light-emitting part (320) are each located at both ends of the first light-emitting part (310), and the radial sizes of the third light-emitting part (330) and the second light-emitting part (320) may all be larger than the radial size of the first light-emitting part (310), so that the common cross-sectional schematic of the first light-emitting part (310), the second light-emitting part (320), and the third light-emitting part (330) shows an "I" shape, and the first light-emitting part (310) is located in the mounting hole (111), and one of the second light-emitting part (320) and the third light-emitting part (330) is connected to one side of the wall part (110) facing the outside of the housing (100), and the other is connected to one side of the wall part (110) facing the inside of the housing (100), so that the connection between the light-emitting part (300) and the wall part (110) Stability can be further improved.
[0054] Referring to FIG. 7, FIG. 7 is a schematic diagram of a third cross-sectional structure along the AA direction of the battery cell (10) shown in FIG. 4.
[0055] A mounting hole (111) penetrating the wall (110) along the thickness direction of the wall (110) is installed in the wall (110), and the light-transmitting component (300) also includes a light-transmitting body (340) and a sealing member (400), the sealing member (400) is installed surrounding the periphery of the light-transmitting body (340), and the light-transmitting body (340) is fitted into the mounting hole (111) through the sealing member (400). The light-transmitting body (340) may allow the passage of light, for example, light may be transmitted from one side surface of the light-transmitting body (340) to the other side surface. The sealing member (400) may be a sealing plastic, and the sealing member (400) may be annular, and the annular sealing member (400) may be fitted into a part of the outer periphery of the light-transmitting body (340); Alternatively, the sealing member (400) may be in the form of a sleeve, and the sleeve-shaped sealing member (400) may be installed by fitting it into the entire outer circumference of the light-transmitting body (340). The shape of the mounting hole (111) may match the shape of the sealing member (400), and the radial size of the mounting hole (111) may be slightly larger than the radial size of the sealing member (400), so that when the light-transmitting body (340) is fitted into the mounting hole (111) through the sealing member (400), the outer wall of the sealing member (400) and the inner wall of the mounting hole (111) are easily bonded closely together. Thus, the sealing member (400) is installed to surround the periphery of the light-transmitting body (340), making it easy for the light-transmitting body (340) to be fitted into the mounting hole (111) through the sealing member (400), improving the stability of mounting the light-transmitting body (340) and the sealing effect on the mounting hole (111), and mitigating the risk of the electrolyte inside the battery cell (10) leaking from the mounting hole (111).
[0056] Additionally, the sealing member (400) includes a sealing body portion (410) and a sealing connection portion (420), a mounting groove (430) is installed in the sealing body portion (410), the notch of the mounting groove (430) faces the outside of the housing (100), a light-transmitting body (340) is installed within the mounting groove (430), and the sealing connection portion (420) is connected to one side of a wall portion (110) facing the outside of the housing (100). The sealing main body (410) may appear as a hollow column shape, and the hollow part forms a mounting groove (430). A light-emitting main body (340) is installed within the mounting groove (430). The position of the light-emitting main body (340) is restricted through the lower wall of the mounting groove (430). At the same time, the shape of the mounting groove (430) can be matched with the shape of the light-emitting main body (340). The radial size of the mounting groove (430) is slightly larger than the radial size of the light-emitting main body (340), so that the light-emitting main body (340) can be stably fitted and installed within the mounting groove (430). The outer diameter of the sealing body part (410) may be slightly smaller than the inner diameter of the mounting hole (111), so that when the light-transmitting body (340) is fitted into the mounting hole (111) through the sealing body part (410), the outer wall of the sealing body part (410) and the inner wall of the mounting hole (111) are easily bonded together. The sealing connection part (420) is connected to one side of the sealing body part (410) near the outside of the housing (100), and the sealing connection part (420) is installed surrounding the outer circumference of the sealing body part (410) and may extend outward. When the sealing main body (410) is inserted into the mounting hole (111), the sealing connecting part (420) can overlap one side of the wall part (110) facing the outside of the housing (100), thereby maintaining a relatively fixed state between the sealing member (400) and the wall part (110). For example, the sealing connecting part (420) can be fixedly connected to the wall part (110) through methods such as adhesive or welding, thereby simplifying the method of fixing the light-transmitting component (300) through the sealing member (400) and improving mounting efficiency.
[0057] Additionally, a light-emitting hole (411) is installed in the lower wall of the mounting groove (430), and the light-emitting hole (411) connects the inside of the housing (100) with the mounting groove (430), and the light-emitting body (340) covers the light-emitting hole (411), and the signal light (211) is transmitted to the outside of the housing (100) through the light-emitting hole (411) and the light-emitting body (340). The size of the light-emitting hole (411) can be set according to the actual situation, and the radial size of the light-emitting hole (411) may be smaller than the radial size of the light-emitting body (340) so that the light-emitting body (340) can be loaded inside the mounting groove (430). When the light-emitting hole (411) is loaded into the mounting groove (430), the light-emitting body (340) can cover the light-emitting hole (411). When the first optical communication element (210) emits a signal light (211), the signal light (211) can be incident on the light-emitting body (340) from one side of the light-emitting body (340) through the light-emitting hole (411) and can be emitted from the other side of the light-emitting body (340), thereby facilitating the transmission of the signal light (211) from inside the battery cell (10) to outside the battery cell (10) through the light-emitting component (300) and improving the transmission stability of the signal light (211).
[0058] In some embodiments, the mounting hole (111) is a liquid injection hole. The liquid injection hole can be understood as a through hole penetrating the wall (110), and during the production process of the battery cell (10), an electrolyte can be injected into the housing (100) through the liquid injection hole. If the liquid injection hole is used directly as the mounting hole (111), there is no need to separately open the mounting hole (111) in the wall (110) to house the light-transmitting component (300), thereby making the overall structure simpler.
[0059] Referring to FIG. 8, FIG. 8 is a schematic diagram of a fourth cross-sectional structure along the AA direction of the battery cell (10) shown in FIG. 4.
[0060] The battery cell (10) also includes a lower plastic member (800), the lower plastic member (800) is adhesively installed on one side of a wall portion (110) facing the interior of the housing (100), a storage groove (810) is installed in the lower plastic member (800), the notch of the storage groove (810) faces the wall portion (110), and a detection module (200) is installed within the storage groove (810). The lower plastic member (800) may be formed by integrally pre-molding plastic or by assembling individual plastic parts, and the material of the lower plastic member (800) may include an insulating material. The lower plastic member (800) may provide insulating performance and improve electrical insulation between the interior of the housing (100) and the wall portion (110). In addition, the lower plastic member (800) can also serve to fix and protect the electrode assembly (130) inside the housing (100), thereby reducing the risk of disconnection caused by displacement of components such as the electrode assembly (130) inside the housing (100) during the transportation and use of the battery cell (10), particularly in a vibrating environment. The method of connection between the lower plastic member (800) and the wall (110) includes, but is not limited to, welding, bonding, or hook connections. Specifically, a plurality of protrusions may be installed on one side of the lower plastic member (800) facing the wall (110), and a hole may be installed in the wall (110) to correspond to the protrusions. When the lower plastic member (800) is bonded to the wall (110), the protrusions are fitted into the holes to achieve the purpose of connecting the lower plastic member (800) and the wall (110). The notch of the storage groove (810) faces the wall (110), so that when the lower plastic member (800) is adhesively installed on the wall (110), the entire detection module (200) can be mounted in the storage groove (810), thereby allowing the detection module (200) to be loaded through the lower plastic member (800) and simplifying the complexity of mounting and fixing the detection module (200).
[0061] Referring to FIG. 9, FIG. 9 is a schematic diagram of a fifth cross-sectional structure along the AA direction of the battery cell (10) shown in FIG. 4.
[0062] The battery cell (10) also includes an electrode post (140) and a first conductive member (600), the electrode post (140) penetrates the wall (110), and the first conductive member (600) is located inside the housing (100) and is connected to the electrode post (140) and the detection module (200), respectively, so that the electrode post (140) and the detection module (200) form a current circuit. The electrode post (140) can be used as a charging and discharging interface for the battery cell (10) to connect the battery cell (10) with an external circuit. Specifically, the electrode post (140) penetrates the wall (110), and one end of the electrode post (140) located outside the housing (100) can be electrically connected to an external device, and one end of the electrode post (140) located inside the housing (100) can be electrically connected to the electrode tab of the electrode assembly (130) to form a current circuit, so that the battery cell (10) can perform charging or discharging operations through the electrode post (140). The first conductive member (600) may be a structure such as a wire or a conductive sheet, and the first conductive member (600) may be connected to the detection module (200) and the electrode post (140), respectively, so that the electrode post (140) and the detection module (200) can form a current circuit through the first conductive member (600), and furthermore, the detection module (200) can be energized through the electrode post (140) to reduce the difficulty of power supply to the detection module (200).
[0063] Furthermore, the electrode column (140) also includes an anode column (141) and a cathode column (142), and the anode column (141) and the cathode column (142) each penetrate the wall (110), and the detection module (200) is installed between the anode column (141) and the cathode column (142), and the first conductive member (600) includes two first conductors (610), one first conductor (610) connects the anode column (141) and the detection module (200), and the other first conductor (610) connects the cathode column (142) and the detection module (200). The detection module (200), the positive column (141), and the negative column (142) can be located on the same straight line, and the detection module (200) can be located at an intermediate position between the positive column (141) and the negative column (142), or the detection module (200) can be installed closer to the negative column (142) or closer to the positive column (141), thereby simultaneously reducing the length of the wiring harness of the two first wires (610), simplifying the complexity of the wiring harness arrangement, and lowering the difficulty of power supply to the detection module (200).
[0064] In some embodiments, the battery cell (10) also includes a data processing module (500), the data processing module (500) is installed outside the housing (100), and the data processing module (500) includes a second optical communication element (510) and a data processing element (520) connected to each other, the second optical communication element (510) is used to receive a signal light (211), and the data processing element (520) is used to receive data generated according to the signal light (211). The data processing module (500) may be fixedly mounted on one side surface of a wall portion (110) facing outside the housing (100). The second optical communication element (510) includes, but is not limited to, an infrared communication element, and the second optical communication element (510) may be used to receive or emit a signal light (211), and the signal light (211) emitted from the first optical communication element (210) is transmitted from inside the housing (100) through the light-emitting component (300) to outside the housing (100) and then received by the second optical communication element (510). In some embodiments, after receiving the signal light (211), the second optical communication element (510) may convert the signal light (211) into state data of the battery cell (10), and then transmit the state data to a data processing element (520) so that the data processing element (520) receives data generated according to the signal light (211). When the detection module (200) needs to be controlled to collect data, light can be emitted from the second optical communication element (510) to the first optical communication element (210), and then the first optical communication element (210) demodulates the light and obtains a control signal, making it easy for the detection element (220) to detect the state data of the battery cell (10) according to the control signal.Thus, the data processing module (500) is installed outside the housing (100), making it easy for the second optical communication element (510) to receive the signal light (211) outside the housing (100), and by receiving and obtaining the state data of the battery cell (10) through the data processing element (520), the transmission and reception of battery cell (10) data is implemented through an optical signal transmission method, and compared to a wired transmission method, the complexity of the wiring harness inside the battery cell (10) can be further reduced, and there is no need to separately open a through hole to pass the wiring harness through the housing (100), thereby lowering the overall processing difficulty.
[0065] Additionally, the first optical communication element (210), the light-emitting component (300), and the second optical communication element (510) are installed sequentially in the thickness direction of the wall (110). That is, the first optical communication element (210), the light-emitting component (300), and the second optical communication element (510) are all located in the thickness direction of the wall (110), so that the second optical communication element (510) can easily receive the signal light (211), shorten the transmission path of the signal light (211), improve the reception efficiency of the signal light (211), and further improve the overall data transmission efficiency.
[0066] In some embodiments, the battery cell (10) also includes an electrode post (140) and a second conductive member (700), the electrode post (140) penetrates the wall (110), and the second conductive member (700) is located outside the housing (100) and is connected to the electrode post (140) and the data processing module (500), respectively, so that the electrode post (140) and the data processing module (500) form a current circuit. The electrode post (140) can be used as a charging and discharging interface for the battery cell (10) to connect the battery cell (10) with an external circuit. Specifically, the electrode post (140) penetrates the wall (110), and one end of the electrode post (140) located outside the housing (100) can be electrically connected to an external device, and one end of the electrode post (140) located inside the housing (100) can be electrically connected to the electrode tab of the electrode assembly (130) to form a current circuit, so that the battery cell (10) can perform charging or discharging operations through the electrode post (140). The second conductive member (700) may be a structure such as a conductor or a conductive sheet, and the second conductive member (700) may be connected to the data processing module (500) and the electrode post (140), respectively, so that the electrode post (140) and the data processing module (500) can form a current circuit through the second conductive member (700), and furthermore, the data processing module (500) can be energized through the electrode post (140) to reduce the difficulty of power supply to the data processing module (500).
[0067] Furthermore, the electrode column (140) also includes an anode column (141) and a cathode column (142), and the anode column (141) and the cathode column (142) each penetrate the wall (110), and a data processing module (500) is installed between the anode column (141) and the cathode column (142), and a second conductive member (700) includes two second conductors (710), one second conductor (710) connects the anode column (141) and the data processing module (500), and the other second conductor (710) connects the cathode column (142) and the data processing module (500). The data processing module (500), the positive electrode (141), and the negative electrode (142) can be located on the same straight line, and the data processing module (500) can be located at an intermediate position between the positive electrode (141) and the negative electrode (142), or the data processing module (500) can be installed closer to the negative electrode (142) or closer to the positive electrode (141), thereby simultaneously reducing the length of the wiring harness of the two second wires (710), simplifying the complexity of the wiring harness arrangement, and lowering the difficulty of power supply to the data processing module (500).
[0068] In some embodiments, the data processing module (500) also includes a wireless communication element (530), the wireless communication element (530) is connected to the data processing element (520), and the wireless communication element (530) is used to transmit data generated by the signal light (211) to an external device. The wireless communication element (530) is connected to the data processing element (520) to facilitate data transmission between the data processing element (520) and the wireless communication element (530). The wireless communication element (530) can perform wireless communication with an external device, wherein the wireless communication method may include, but is not limited to, Bluetooth, Wi-Fi, near-field communication (NFC), etc., and the external device may include, but is not limited to, a battery management system or a vehicle central control system, etc. After receiving data generated by the signal light (211), the wireless communication element (530) can transmit the relevant data to an external device via a wireless transmission method, or receive relevant commands transmitted by the external device via a wireless transmission method. Thus, data generated by the signal light (211) can be transmitted to an external device through the wireless communication element (530), thereby reducing the complexity of the wiring harness compared to the wired transmission method and making the overall communication method more concise.
[0069] In summary, the state data of the battery cell (10) is detected through the built-in detection element (220), and the first optical communication element (210) transmits the signal light (211) generated according to the state data to the outside of the housing (100) through the light-emitting component (300), thereby transmitting the state data of the battery to the outside of the battery cell (10) in a wireless transmission manner. Compared to a wired transmission method, the complexity of the wiring harness inside the battery cell (10) can be further reduced, and there is no need to separately open a through hole to pass the wiring harness through the housing (100), thereby lowering the overall processing difficulty.
[0070] In the description of the embodiments of this application, technical terms such as "first," "second," etc., are used merely to distinguish different objects and should not be understood as indicating or implying relative importance, or as implicitly indicating the number of indicated technical features, a specific order, or the relationship between primary and secondary. In the description of the embodiments of this application, the term "plural" means two or more unless otherwise clearly and specifically limited.
[0071] The term "Examples" as used herein means that specific features, structures, or characteristics described by combining examples may be included in at least one of the embodiments of this application. The words appearing in various places in this specification do not necessarily refer to the same embodiment, nor are they independent embodiments or alternative embodiments mutually exclusive from other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
[0072] In the description of the embodiments of the present application, the term "and / or" is merely an association describing the associated objects and indicates that three relationships may exist; for example, A and / or B may represent the three cases where A exists alone, where A and B exist simultaneously, or where B exists alone. Additionally, the symbol " / " in this application generally indicates that the preceding and succeeding associated objects are in an "or" relationship.
[0073] In the description of the embodiments of the present application, the term "plural" refers to two or more (including two), likewise "plural group" refers to two or more groups (including two groups), and "plural part" refers to two or more parts (including two parts).
[0074] In the description of the embodiments of the present application, the directional or positional relationships indicated by technical terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," "circular direction," etc., are based on the directional or positional relationships depicted in the drawings. This is merely for the convenience and simplification of the description of the embodiments of the present application and does not imply or suggest that the indicated device or element must have a specific direction or be configured and operated in a specific direction; therefore, it should not be understood as a limitation on the embodiments of the present application.
[0075] Unless otherwise clearly specified and limited in the description of the embodiments of this application, technical terms such as "mounting," "interconnecting," "connecting," and "fixing" should be understood in a broad sense, for example, they may be fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections via an intermediate medium; or communication within two elements or an interactive relationship between two elements. Those skilled in the art will understand the specific meaning of the aforementioned terms in the embodiments of this application according to the specific circumstances.
[0076] Finally, it should be noted that each of the above embodiments is used merely to illustrate the technical solution of this application and is not intended to limit it; although this application has been described in detail with reference to each of the aforementioned embodiments, those skilled in the art may still modify the technical solution described in each of the aforementioned embodiments or substitute some or all of the technical features therein with equivalents; provided, however, that such modification or substitution does not deviate the essence of the corresponding technical solution from the scope of the technical solution of each embodiment of this application, and that all such modifications or substitutions must be encompassed within the scope of the claims and specification of this application. In particular, all technical features mentioned in each embodiment may be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein and includes all technical solutions that fall within the scope of the claims. Explanation of the symbols
[0077] 1: Vehicle; 2: Battery; 3: Controller; 4: Motor; 20: Case; 21: First part; 22: Second part; 10: Battery cell; 100: Housing; 110: Wall part; 111: Mounting hole; 120: Housing body; 130: Electrode assembly; 140: Electrode post; 141: Positive electrode post; 142: Negative electrode post; 200: Detector module; 210: First optical communication element; 211: Signal light; 220: Detector element; 300: Light-emitting component; 310: First light-emitting part; 320: Second light-emitting part; 330: Third light-emitting part; 340: Light-emitting body; 400: Sealing member; 410: Sealing body part; 411: Light-emitting hole; 420: Sealing connection part; 430: Mounting groove; 500: Data processing module; 510: Second optical communication element; 520: Data processing element; 530: Wireless communication element; 600: First conductive member; 610: First conductor; 700: Second conductive member; 710: Second conductor; 800: Lower plastic member; 810: Storage groove.
Claims
Claim 1 A battery cell comprising: a housing including a wall portion - said wall portion includes a light-emitting component -; and a detection module installed inside the housing - said detection module includes a detection element and a first optical communication element, said detection element is connected to said first optical communication element, said detection element is used to detect state data of said battery cell, said first optical communication element is used to transmit signal light generated according to said state data to the outside of said housing through the light-emitting component - characterized by being a battery cell. Claim 2 A battery cell according to claim 1, wherein the light-transmitting component penetrates the mutually opposite surfaces of the wall in the thickness direction of the wall. Claim 3 A battery cell according to claim 2, wherein a mounting hole penetrating the wall portion along the thickness direction is installed in the wall portion, and the light-emitting component includes a first light-emitting portion and a second light-emitting portion connected to each other, wherein the first light-emitting portion is fitted into the mounting hole, and the second light-emitting portion is connected to one side of the wall portion facing the outside of the housing, or the second light-emitting portion is connected to one side of the wall portion facing the inside of the housing. Claim 4 A battery cell according to claim 3, wherein the light-emitting component also includes a third light-emitting part, and the second light-emitting part and the third light-emitting part are each connected to both ends of the first light-emitting part in the thickness direction, and one of the second light-emitting part and the third light-emitting part is connected to one side of the wall facing the outside of the housing, and the other is connected to one side of the wall facing the inside of the housing. Claim 5 A battery cell according to claim 1, wherein a mounting hole penetrating the wall portion along the thickness direction of the wall portion is installed in the wall portion, and the light-transmitting component also includes a light-transmitting body and a sealing member, wherein the sealing member is installed surrounding the periphery of the light-transmitting body, and the light-transmitting body is fitted into the mounting hole through the sealing member. Claim 6 A battery cell according to claim 5, wherein the sealing member comprises a sealing body portion and a sealing connection portion, a mounting groove is installed in the sealing body portion, the notch of the mounting groove faces the outside of the housing, the light-transmitting body is installed within the mounting groove, and the sealing connection portion is connected to one side of the wall portion facing the outside of the housing. Claim 7 A battery cell according to claim 6, wherein a light-transmitting hole is installed in the lower wall of the mounting groove, the light-transmitting hole communicates with the inside 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. Claim 8 A battery cell characterized in that, in any one of paragraphs 3 to 7, the mounting hole is a liquid injection hole. Claim 9 A battery cell according to any one of claims 1 to 8, wherein the battery cell also comprises an electrode post and a first conductive member, wherein the electrode post penetrates the wall portion and the first conductive member is located inside the housing and is connected to the electrode post and the detection module, respectively, so as to form a current circuit between the electrode post and the detection module. Claim 10 A battery cell according to claim 9, wherein the electrode column also includes an anode column and a cathode column, the anode column and the cathode column each penetrate the wall, the detection module is installed between the anode column and the cathode column, and the first conductive member includes two first conductors, one of which connects the anode column and the detection module, and the other of which connects the cathode column and the detection module. Claim 11 A battery cell according to any one of claims 1 to 10, wherein the battery cell also comprises a lower plastic member, the lower plastic member is adhesively installed on one side of the wall facing the interior of the housing, a storage groove is installed in the lower plastic member, the notch of the storage groove faces the wall, and the detection module is installed within the storage groove. Claim 12 A battery cell according to any one of claims 1 to 11, wherein the battery cell also includes a data processing module, the data processing module is installed outside the housing, and the data processing module includes a second optical communication element and a data processing element connected to each other, wherein 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. Claim 13 A battery cell according to claim 12, wherein the first optical communication element, the light-transmitting component, and the second optical communication element are sequentially installed in the thickness direction of the wall portion. Claim 14 A battery cell according to claim 12 or 13, wherein the battery cell also comprises an electrode post and a second conductive member, wherein the electrode post penetrates the wall portion and the second conductive member is located outside the housing and is connected to the electrode post and the data processing module, respectively, so as to cause the electrode post and the data processing module to form a current circuit. Claim 15 A battery cell according to claim 14, wherein the electrode column also includes an anode column and a cathode column, the anode column and the cathode column each penetrate the wall, the data processing module is installed between the anode column and the cathode column, and the second conductive member includes two second conductors, one of which connects the anode column and the data processing module, and the other of which connects the cathode column and the data processing module. Claim 16 A battery cell according to any one of claims 12 to 15, wherein the data processing module also includes a wireless communication element, the wireless communication element is connected to the data processing element, and the wireless communication element is used to transmit data generated by the signal light to an external device. Claim 17 A battery cell characterized in that, in any one of claims 1 to 16, the detection element comprises one or more of a temperature sensor, a pressure sensor, a voltage sensor, and an impedance sensor. Claim 18 A battery, wherein the battery comprises a battery cell according to any one of claims 1 to 17. Claim 19 An electric device, wherein the electric device comprises a battery according to claim 18.