Single battery, battery module, battery pack and electric equipment

Abstract

The utility model discloses a single battery, a battery module, a battery pack and electric equipment, and belongs to the technical field of power batteries, the single battery comprises a shell, a cover plate assembly and a chip acquisition module, and the shell is provided with an accommodating cavity; the cover plate assembly comprises a negative electrode cover plate body, a positive electrode cover plate body, a negative electrode post terminal and a positive electrode post terminal, the negative electrode cover plate body and the positive electrode cover plate body are arranged at the two ends of the shell to cover and seal the containing cavity, the negative electrode post terminal penetrates through the negative electrode cover plate body, and the positive electrode post terminal penetrates through the positive electrode cover plate body and is electrically connected with the positive electrode cover plate body; the chip acquisition module is arranged on one side, deviating from the shell, of the cathode cover plate body and is electrically connected with the cathode pole terminal; according to the application, sampling assembly design is avoided by collecting the single batteries, so that the technical problems that the sampling assembly design is time-consuming and the universal rate of parts is relatively low are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power batteries, and particularly relates to a single battery cell, a battery module, a battery pack and an electric device. BACKGROUND

[0002] Current blade cells are usually of a conventional design without collection function, that is, the cell and the information collection unit are independent, and after the cells are stacked into a module, the sampling assembly is welded. When the number of cell strings and the gap between cells change, the conventional cell needs to be redesigned for PACK design, and the wire harness matched with the sampling assembly also needs to be redesigned, which consumes a large amount of design time and has a low commonality of parts. Moreover, the existing sampling scheme from the board is a centralized sampling scheme, which usually collects 14 / 16 / 18 voltages and is configured with only 2 temperature collection channels, so that the temperature measurement cannot achieve full coverage, which is not conducive to the release of the health state monitoring and the charging and discharging power of the cell. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the application provide a single battery cell, which aims to overcome the technical problem of time-consuming design of the sampling assembly and low commonality of parts; another object of embodiments of the application is to provide a battery module; still another object of embodiments of the application is to provide a battery pack; and yet another object of embodiments of the application is to provide an electric device.

[0004] Embodiments of the application provide a single battery cell, which comprises:

[0005] A shell having a receiving cavity;

[0006] An electrode assembly arranged in the receiving cavity;

[0007] A cover plate assembly comprising a negative cover plate body, a positive cover plate body, a negative pole post terminal and a positive pole post terminal, the negative cover plate body and the positive cover plate body being arranged at both ends of the shell to seal the receiving cavity, the negative pole post terminal penetrating the negative cover plate body and being electrically connected with the electrode assembly, and the positive pole post terminal penetrating the positive cover plate body and being electrically connected with the electrode assembly;

[0008] A chip collection module arranged on a side of the negative cover plate body away from the shell and connected with the negative pole post terminal, and the chip collection module being connected with the negative cover plate body.

[0009] In some embodiments, the chip collection module comprises:

[0010] A first body arranged on a side of the negative cover plate body away from the shell and connected with the negative cover plate body;

[0011] A collection chip is mounted on the side of the first body away from the negative cover body and connected with the first body;

[0012] A first sutured aluminum wire has one end connected with the first body and the other end connected with the negative terminal;

[0013] A second sutured aluminum wire has one end connected with the first body and the other end connected with the negative cover body.

[0014] In some embodiments, the single battery further comprises an insulating piece covering the shell, the positive cover body and the negative cover body;

[0015] The single battery has a first, a second and a third avoiding slot penetrating through the insulating piece along the thickness direction of the insulating piece; the first avoiding slot has a larger orthographic projection on the negative cover body than the negative terminal to expose the negative terminal; the second avoiding slot has a larger orthographic projection on the positive cover body than the positive terminal to expose the positive terminal; the third avoiding slot has a larger orthographic projection on the negative cover body than the first body to expose part of the negative cover body and the first body, and the second sutured aluminum wire is connected with the exposed part of the negative cover body.

[0016] In some embodiments, the single battery further has a fourth avoiding slot penetrating through the insulating piece along the thickness direction of the insulating piece, and the fourth avoiding slot communicates with the second avoiding slot and exposes part of the positive cover body;

[0017] The single battery further comprises a third sutured aluminum wire having one end connected with the positive terminal and the other end connected with the exposed part of the positive cover body.

[0018] In some embodiments, the positive terminal has a second groove recessed along the thickness direction of the positive terminal on the side close to the fourth avoiding slot, and the third sutured aluminum wire passes through the groove wall of the second groove and is connected with the positive terminal of the positive cover body and the positive terminal of the positive terminal respectively.

[0019] In some embodiments, the negative terminal has a first groove recessed along the thickness direction of the negative terminal on the side close to the third avoiding slot, and the first sutured aluminum wire passes through the groove wall of the first groove and is connected with the first body and the negative terminal of the negative terminal respectively.

[0020] In some embodiments, the single battery further comprises:

[0021] A first protective cover is arranged on the side of the negative cover plate body away from the shell and connected with the negative cover plate body, and the first protective cover covers the chip collection module and part of the negative pole terminal;

[0022] A second protective cover is arranged on the side of the positive cover plate body away from the shell and connected with the positive cover plate body, and the second protective cover covers the connection between the positive pole terminal and the positive cover plate body.

[0023] The application further discloses a battery module, which comprises:

[0024] The battery module body comprises a plurality of single batteries as described in the above embodiments, and the plurality of single batteries are arranged in sequence along the thickness direction of the single batteries.

[0025] A flexible circuit board is arranged around the outer wall of the battery module body, and the flexible circuit board passes through the positive pole terminal and the negative pole terminal of all the single batteries.

[0026] The application further discloses a battery pack, which comprises the single battery described in any one of the above embodiments or the battery module described in the above embodiments.

[0027] The application further discloses a power consumption device, which comprises the single battery described in the above embodiments, or the battery module described in the above embodiments, or the battery pack described in the above embodiments.

[0028] The application has one of the following beneficial effects:

[0029] The single battery of the embodiment of the present application comprises a shell, an electrode assembly, a cover plate assembly and a chip acquisition module, wherein the shell has a containing cavity, and the electrode assembly is arranged in the containing cavity. The cover plate assembly comprises a negative cover plate body, a positive cover plate body, a negative pole post terminal and a positive pole post terminal. The negative cover plate body and the positive cover plate body are arranged at both ends of the shell to seal the containing cavity. The negative pole post terminal penetrates through the negative cover plate body and is electrically connected with the electrode assembly. The positive pole post terminal penetrates through the positive cover plate body and is electrically connected with the electrode assembly. The chip acquisition module is arranged on the side of the negative cover plate body away from the shell and is connected with the negative pole post terminal. The chip acquisition module is connected with the negative cover plate body. The chip acquisition module can acquire the parameters of the single battery, such as current and voltage. The positive pole post terminal is connected with the positive cover plate body, the positive cover plate body is connected with the shell, the shell is connected with the negative cover plate body, and the negative cover plate body is connected with the chip acquisition module. Therefore, the chip acquisition module can acquire the parameters of the positive pole. The negative pole post terminal is connected with the chip acquisition module. Therefore, the chip acquisition module can acquire the parameters of the positive pole and the negative pole. The embodiment of the present application avoids the need for sampling assembly design, thereby solving the technical problems of time-consuming sampling assembly design and low general rate of parts.

[0030] The battery module of the embodiment of the present application comprises the single battery as described in the above embodiment. Therefore, all the technical features and technical effects of the single battery described above can be achieved, and details are not described herein.

[0031] The battery pack of the embodiment of the present application comprises the single battery as described in the above embodiment or the battery module as described in the above embodiment. Therefore, all the technical features and technical effects of the single battery described above can be achieved, and details are not described herein.

[0032] The power consumption device of the embodiment of the present application comprises the single battery as described in the above embodiment or the battery module as described in the above embodiment or the battery pack as described in the above embodiment. Therefore, all the technical features and technical effects of the single battery or the battery pack described above can be achieved, and details are not described herein. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The overall structure of the single battery from one angle is shown in the schematic view.

[0035] Figure 2An overall structure schematic view of a single battery from another perspective according to an embodiment of the present application is provided;

[0036] Figure 3 An overall structure schematic view of a chip collection module according to an embodiment of the present application is provided;

[0037] Figure 4 An installation position schematic view of a first protective cover according to an embodiment of the present application is provided;

[0038] Figure 5 An installation position schematic view of a second protective cover according to an embodiment of the present application is provided;

[0039] Figure 6 An enlarged view of a portion A in FIG. 1 is provided; Figure 1

[0040] An enlarged view of a portion B in FIG. 1 is provided; Figure 7 Figure 2 An overall structure simple schematic view of a battery module according to an embodiment of the present application is provided.

[0041] Figure 8 Legend of reference signs:

[0042] Legend of reference signs:

[0043] 1 - battery module main body; 2 - flexible circuit board; 3 - communication interface; 4 - peripheral electronic element; 5 - near field communication transmitting antenna; 6 - valve opening detection lug; 7 - explosion-proof valve; 8 - first protective cover; 9 - second protective cover;

[0044] 10 - shell;

[0045] 20 - cover plate assembly; 21 - negative cover plate body; 22 - positive cover plate body; 23 - negative pole post terminal; 24 - positive pole post terminal; 25 - second groove; 26 - first groove;

[0046] 30 - chip collection module; 31 - first body; 32 - collection chip; 33 - first sutured aluminum wire; 34 - second sutured aluminum wire; 35 - third sutured aluminum wire;

[0047] 40 - insulating piece;

[0048] 50 - first avoiding groove;

[0049] 60 - second avoiding groove;

[0050] 70 - third avoiding groove;

[0051] 80 - fourth avoiding groove. DETAILED DESCRIPTION

[0052] ​With reference to the drawings and the embodiments described herein, it will be understood that the drawings are diagrammatic and are not drawn to scale nor with true perspective unless otherwise indicated. It will be further understood that certain features of the embodiments of the present application can be used in conjunction with others, separately, or in the complete absence of others. It will be understood that the drawings and description thereto are illustrative of the principles of the present application. Where the description of a specific embodiment has been used, changes in materials, dimensions, and shapes can be made to adapt the specific embodiment to other situations without departing from the principles of the present application.

[0053] It should be noted that the terms "first", "second", and the like, used in the description and the claims of the present application as well as above description of the drawings do not necessarily have an ordinal or chronological significance. It should be understood that where appropriate, the data used in such descriptions can be interchanged, so that the embodiments of the present application, described herein, can be carried out in sequences other than those illustrated or described herein. In the description of the present application, "a plurality" means two or more, unless otherwise specified. The "and / or" describes the associated objects in the associated relationship, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents the relationship between the front and rear associated objects as "or". In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0054] Those skilled in the art can understand that the drawings are only schematic diagrams of example embodiments, which can not be to scale. The modules or flows in the drawings are not necessarily essential for implementing the present application, and therefore cannot be used to limit the scope of protection of the present application.

[0055] As a preamble of the embodiments of the present application, the current blade cell is usually of a conventional design without collection function, that is, the cell and the information collection unit are independent, and the cell is stacked into a module, and then the welding of the sampling assembly is performed. When the cell string number and the cell gap change, the conventional cell needs to be redesigned for the sampling assembly, and the wire harness matched therewith also needs to be redesigned, which consumes a large amount of design man-hours and has a low commonality of parts. Moreover, the existing sampling scheme from the board set usually collects 14 / 16 / 18 voltages and only configures 2 temperature collection channels, and the temperature measurement cannot achieve full coverage, which is not conducive to the cell health state monitoring and the release of the charging and discharging power. The existing cell integrated sampling chip scheme usually adopts a nickel sheet to connect the cell pole, the cell shell 10 and the chip collection module 30. Since the nickel sheet and the PCB (printed circuit board) are soldered, at least a 5mm*5mm welding area is needed, the nickel sheet itself does not have a fuse function, and a fuse needs to be arranged on the PCB, which causes the PCB module integrated with the chip to have a large size and cannot be miniaturized. Moreover, the nickel sheet and the cell and the pole need to be laser welded, if the nickel sheet is not well attached to the cell and the pole, a gap exists, laser penetration of the cell cover plate or a molten pit in the pole welding area is easily caused, and the cell is scrapped.

[0056] Therefore, the embodiments of the present application provide a single battery, which aims to at least partially solve the above technical problems.

[0057] Please refer to Figures 1 to 5 The embodiments of the present application provide a single battery, please refer to Figure 1 and Figure 2 , Figure 1 The embodiments of the present application provide a single battery from an angle of the overall structure, Figure 2 The embodiments of the present application provide a single battery from another angle of the overall structure. The single battery comprises a shell 10, an electrode assembly, a cover plate assembly 20 and a chip collection module 30, wherein: the shell 10 has a containing cavity; the electrode assembly is arranged in the containing cavity. The cover plate assembly 20 comprises a negative cover plate body 21, a positive cover plate body 22, a negative pole terminal 23 and a positive pole terminal 24, the negative cover plate body 21 and the positive cover plate body 22 are arranged at both ends of the shell 10 to seal the containing cavity, the negative pole terminal 23 penetrates through the negative cover plate body 21 and is electrically connected with the electrode assembly, and the positive pole terminal 24 penetrates through the positive cover plate body 22 and is electrically connected with the electrode assembly. The chip collection module 30 is arranged on the side of the negative cover plate body 21 away from the shell 10 and is connected with the negative pole terminal 23, and the chip collection module 30 is connected with the negative cover plate body 21.

[0058] It should be noted that, in order to better illustrate the structure of the single battery, Figure 1The middle shell 10 is only partially shown. The negative cover plate body 21 and the positive cover plate body 22 can adopt an aluminum plate material. The negative cover plate body 21 and the positive cover plate body 22 can be fixedly connected with the shell 10 in a welding manner. After the negative cover plate body 21 and the positive cover plate body 22 are welded with the shell 10 respectively, a sealed space containing cavity with certain mechanical strength for protecting the electrode assembly is formed.

[0059] Therefore, in the embodiment, the chip acquisition module 30 is used to acquire the parameters such as the current and voltage of the single battery. Specifically, the positive pole terminal 24 is connected with the positive cover plate body 22, the positive cover plate body 22 is connected with the shell 10, the shell 10 is connected with the negative cover plate body 21, and the negative cover plate body 21 is connected with the chip acquisition module 30, so that the chip acquisition module 30 can acquire the parameters of the positive pole. In addition, the negative pole terminal 23 is connected with the chip acquisition module 30, so that the chip acquisition module 30 can acquire the parameters of the positive pole and the negative pole. In the embodiment, the acquisition of the single battery avoids the design of the sampling assembly, thereby solving the technical problems that the design of the sampling assembly is time-consuming and the general rate of the parts is low. In order to ensure the safety of the battery cell (the battery cell is the single battery), prevent short circuit, and present a high impedance state, an insulating isolation material needs to be arranged between the positive pole, the negative pole, and the aluminum shell (the aluminum shell is the shell 10). However, in order to prevent electrochemical corrosion, the shell 10 usually needs to be positively charged, and then the aluminum shell needs to be artificially positively charged through a lead wire. However, the positive current of the lead wire is small, and can only be used for limited electrical signal transmission. When a short circuit occurs, the lead wire will heat and melt, so that the shell 10 of the battery cell is disconnected with the positive pole. Since the blade battery cell is long and has two end pole terminals, when the chip acquisition module 30 is placed on the negative side, if the positive side is led to the negative side through a lead wire or a flexible printed circuit (FPC) to complete the signal acquisition, the cost is high. Therefore, the characteristic that the shell 10 is positively charged can be used to realize the information acquisition of the blade battery cell on the same side, and reduce the acquisition cost.

[0060] In some embodiments, please refer to Figure 3 , Figure 3The overall structure schematic diagram of the chip acquisition module provided by the embodiment of the application is shown. The chip acquisition module 30 comprises a first body 31, an acquisition chip 32, a first suture aluminum wire 33 and a second suture aluminum wire 34, wherein: the first body 31 is arranged on the side of the negative cover plate body 21 away from the shell 10 and is connected with the negative cover plate body 21, serving as the basic structure of the chip acquisition module 30 and supporting the installation and connection of other components. The acquisition chip 32 is installed on the side of the first body 31 away from the negative cover plate body 21 and is connected with the first body 31, being responsible for acquiring the current, voltage and other parameters of the single battery. The first suture aluminum wire 33 is connected with the first body 31 at one end and with the negative pole post terminal 23 at the other end, being used for transmitting the electrical signal of the negative pole post terminal 23 to the acquisition chip 32. The second suture aluminum wire 34 is connected with the first body 31 at one end and with the negative cover plate body 21 at the other end, being used for transmitting the electrical signal received by the negative cover plate body 21 to the acquisition chip 32. Through the above structure design, the chip acquisition module 30 can effectively acquire the current and voltage parameters of the single battery and realize the transmission and processing of the signal through a reasonable connection mode. This design avoids the complicated sampling assembly design, reduces the cost and improves the universality and reliability of the parts.

[0061] It should be noted that in the design of the chip acquisition module 30, the peripheral electronic elements 4, the near field communication transmitting antenna 5 and the valve opening detection ear 6 bear different functions respectively and work cooperatively with other components through reasonable connection mode. The peripheral electronic elements 4 usually include basic electronic elements such as resistors, capacitors and diodes, which are responsible for assisting and optimizing the work of the acquisition chip 32. The peripheral electronic elements 4 can be used for signal conditioning, filtering, voltage stabilization and other functions to ensure that the acquisition chip 32 can accurately and stably acquire current and voltage parameters. The peripheral electronic elements 4 are usually directly welded on the first body 31 and electrically connected with the acquisition chip 32 to form a complete circuit system. The near field communication transmitting antenna 5 is used to realize the near field communication (NFC) with external devices. Through near field communication, the monomer battery can exchange data with external devices, such as transmitting the acquired current, voltage and other parameters, or receiving control instructions. The near field communication transmitting antenna 5 is usually also installed on the first body 31 and connected with the acquisition chip 32 to wirelessly transmit the acquired data to external devices. The valve opening detection ear 6 is used to detect the safety state of the monomer battery, especially the state related to the safety valve of the battery. When the internal pressure of the battery is too high, the safety valve may open, and the valve opening detection ear 6 can detect this state change and transmit the signal to the acquisition chip 32. In this way, the system can take timely measures to prevent the battery from being damaged or a safety accident from occurring. The valve opening detection ear 6 is usually connected with the first body 31 and the acquisition chip 32 through wires or direct welding. Through the cooperative work of these components, the chip acquisition module 30 can not only acquire and process the current and voltage parameters of the battery, but also realize the wireless transmission of data through near field communication and monitor the safety state of the battery. This design improves the intelligent level and safety of the battery module, while maintaining the simplicity and reliability of the system.

[0062] In some embodiments, referring to Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 6 is a partial enlarged view of A in FIG. 15, Figure 1 is a partial enlarged view of B in FIG. 15, Figure 7 is a partial enlarged view of C in FIG. 15, Figure 2A partial enlarged view at point B. The single-cell battery also includes an insulating component 40, which covers the housing 10, the positive electrode cover body 22, and the negative electrode cover body 21. The single-cell battery has a first clearance groove 50, a second clearance groove 60, and a third clearance groove 70 penetrating the insulating component 40 along its thickness direction. The first clearance groove 50 is designed to expose the negative electrode terminal 23 on the negative electrode cover body 21. The orthographic projection of the first clearance groove 50 on the negative electrode cover body 21 is larger than the orthographic projection of the negative electrode terminal 23, thereby ensuring that the negative electrode terminal 23 can be fully exposed for easy electrical connection. The second clearance groove 60 is designed to expose the positive electrode terminal 24 on the positive electrode cover body 22; the orthographic projection of the second clearance groove 60 on the positive electrode cover body 22 is larger than the orthographic projection of the positive electrode terminal 24, ensuring that the positive electrode terminal 24 can be fully exposed for easy electrical connection. The third clearance groove 70 is designed to expose a portion of the negative electrode cover plate 21 and the first body 31 on the negative electrode cover plate body 21. The orthographic projection of the third clearance groove 70 on the negative electrode cover plate body 21 is larger than the orthographic projection of the first body 31, thus exposing a portion of the negative electrode cover plate body 21 and the first body 31. This design allows the second stitching aluminum wire 34 to connect to the exposed portion of the negative electrode cover plate body 21, ensuring effective signal transmission. The design of these clearance grooves ensures effective connection between the battery electrodes and the acquisition module, while maintaining the protective function of the insulating component 40.

[0063] It should be noted that the insulating component 40 includes a PET (polyester) film and pressure-sensitive adhesive, and is manufactured by coating the PET film with pressure-sensitive adhesive. The PET film is a polyester film with good insulating properties. The pressure-sensitive adhesive is a sticky adhesive used to fix the PET film to the housing 10, the negative electrode cover plate body 21, and the positive electrode cover plate body 22.

[0064] In some embodiments, such as Figure 7 As shown, the single-cell battery features a fourth clearance groove 80 that extends along the thickness of the insulating member 40 and communicates with the second clearance groove 60. The fourth clearance groove 80 exposes a portion of the positive electrode cover body 22 to facilitate electrical connection. Specifically, the design of the fourth clearance groove 80 exposes a portion of the positive electrode cover body 22, providing the necessary space for the connection of the third stitching aluminum wire 35. One end of the third stitching aluminum wire 35 connects to the positive electrode terminal 24, and the other end connects to the portion of the positive electrode cover body 22 exposed through the fourth clearance groove 80. This design ensures that electrical signals can be effectively transmitted from the positive electrode terminal 24 to the positive electrode cover body 22, optimizing the battery's electrical connection structure while maintaining the overall protective function of the insulating member 40.

[0065] In some embodiments, such as Figure 7As shown, the design of the positive pole post terminal 24 is further optimized to better achieve electrical connection and structural stability. Specifically, the side of the positive pole post terminal 24 close to the fourth avoidance slot 80 is recessed along its thickness direction, forming a second recess 25. This design provides a recessed path for the arrangement of the third stitched aluminum wire 35. One end of the third stitched aluminum wire 35 is connected to the positive pole post terminal 24, and the other end is connected to the positive cover plate body 22 exposed through the fourth avoidance slot 80. Through the design of the second recess 25, the third stitched aluminum wire 35 can pass through the groove wall of the second recess 25, avoiding direct connection along the surface of the positive pole post terminal 24. The purpose of this design is to prevent the overall thickness of the battery cell from increasing, because if the third stitched aluminum wire 35 is directly connected on the surface of the positive pole post terminal 24, it will cause the thickness of the battery cell to increase by the thickness of the aluminum wire. This increase in thickness can cause the battery cell to have an uneven installation surface during installation, thereby affecting the overall assembly quality and performance of the battery. By providing the second recess 25 on the positive pole post terminal 24, the arrangement of the third stitched aluminum wire 35 is ensured not to interfere with the external dimensions of the battery cell, maintaining the flatness of the installation surface. This design not only optimizes the structure of the battery, but also improves the convenience and reliability of installation.

[0066] In some embodiments, as shown in FIG. 1, Figure 6 As shown, the design of the negative pole post terminal 23 is also optimized to improve the efficiency of electrical connection and the stability of the structure. Specifically, the negative pole post terminal 23 is recessed along its thickness direction on the side close to the third avoidance slot 70, forming a first recess 26. The design of the first recess 26 provides a recessed path for the arrangement of the first stitched aluminum wire 33. The first stitched aluminum wire 33 passes through the groove wall of the first recess 26 and is connected to the first body 31 and the negative pole of the negative pole post terminal 23, respectively. Through this design, the aluminum wire can pass through the groove wall of the first recess 26, avoiding direct connection on the surface of the negative pole post terminal 23. The purpose of this design is to prevent the overall thickness of the battery cell from increasing, because if the first stitched aluminum wire 33 is directly connected on the surface of the negative pole post terminal 23, it will cause the thickness of the battery cell to increase by the thickness of the first stitched aluminum wire 33. This increase in thickness can cause the battery cell to have an uneven installation surface during installation, thereby affecting the overall assembly quality and performance of the battery. By providing the first recess 26 on the negative pole post terminal 23, the arrangement of the first stitched aluminum wire 33 is ensured not to interfere with the external dimensions of the battery cell, maintaining the flatness of the installation surface. This design not only optimizes the structure of the battery, but also improves the convenience and reliability of installation.

[0067] In some embodiments, as shown in FIG. 1, Figure 4 , Figure 5 , Figure 8 , Figure 4 the first protective cover installation position diagram provided by the embodiment of the present application, Figure 5A second protective cover installation position schematic diagram provided for the embodiments of the present application, Figure 8 A battery module overall structure simple schematic diagram provided for the embodiments of the present application. The design of the single battery also includes a first protective cover 8 and a second protective cover 9 to provide additional protection and structural support. The first protective cover 8 is arranged on the side of the negative cover plate body 21 away from the shell 10 and is connected with the negative cover plate body 21, and the first protective cover 8 covers the chip collection module 30 and part of the negative pole terminal 23. The purpose of this design is to cover the chip collection module 30 and part of the negative pole terminal 23, thereby effectively protecting these components from external environmental influences such as physical damage or moisture intrusion, improving the safety and reliability of the battery. The second protective cover 9 is arranged on the side of the positive cover plate body 22 away from the shell 10 and is connected with the positive cover plate body 22, and the second protective cover 9 covers the connection between the positive pole terminal 24 and the positive cover plate body 22, ensuring the safety and integrity of the connection.

[0068] In some embodiments, as shown in Figure 4 and Figure 5 , the negative cover plate body 21 and / or the positive cover plate body 22 is provided with an explosion-proof valve 7, which is mainly designed to improve the safety of the battery. The function of the explosion-proof valve 7 is to serve as a safety protection device, when the internal pressure of the battery is too high (for example, due to overcharging, overdischarging, battery failure or external short circuit, etc. causing gas accumulation), the explosion-proof valve 7 can automatically open to release the internal pressure, thereby preventing the battery shell from breaking or exploding. This design can effectively reduce the safety risk of the battery under extreme conditions. By arranging the explosion-proof valve 7 on the negative cover plate body 21 and the positive cover plate body 22, it is ensured that no matter which end of the battery has abnormal pressure, it can be released in time. This double protection mechanism improves the overall safety of the battery module. In addition, the design of the explosion-proof valve 7 usually takes into account the sealing and waterproof performance of the battery to ensure that it will not affect the performance and service life of the battery under normal working conditions. Through reasonable material selection and structural design, the explosion-proof valve 7 can respond quickly when needed, while maintaining good sealing performance under normal conditions.

[0069] The embodiments of the present application also disclose a battery module, please refer to Figure 8 , Figure 8A battery module overall structure simple schematic diagram is provided for the embodiments of the present application. The battery module includes a battery module body 1 and a flexible circuit board 2. The battery module body 1 includes a plurality of single batteries as described in the above embodiments, and the plurality of single batteries are arranged in sequence along the thickness direction of the single battery, forming a compact battery pack structure. This arrangement not only saves space, but also improves the energy density of the battery module. The battery module can have all the technical features and technical effects of the single battery described above, and will not be repeated here. The flexible circuit board 2 is arranged around the outer side wall of the battery module body 1. The design of the flexible circuit board 2 enables it to adapt to the shape and arrangement of the battery module, providing flexible electrical connection. And the flexible circuit board 2 passes through all the positive pole column terminals 24 and negative pole column terminals 23 of the single batteries, realizing the electrical connection between the batteries. This design ensures the overall electrical performance of the battery module and simplifies the assembly and maintenance of the battery module. By using the flexible circuit board 2, the electrical connection of the battery module is more concise and efficient, reducing the complexity of traditional hard connection. The use of flexible circuit board 2 improves the reliability of the battery module under vibration and mechanical stress, reducing the risk of connection point failure. In addition, the design of the flexible circuit board 2 allows the battery module to have greater design flexibility in different application scenarios, adapting to the needs of various shapes and sizes.

[0070] It should be noted that the two ends of the flexible circuit board 2 are provided with communication interfaces 3. The main function of the communication interface 3 is to realize the data exchange and signal transmission between the battery module and the external equipment. Through these communication interfaces 3, the battery module can transmit the collected current, voltage, temperature and other parameters to the external monitoring system or controller for real-time monitoring and management. This is crucial to ensure the safety and efficient operation of the battery module.

[0071] It should be noted that in the field of batteries, the battery module in the present embodiment refers to a PACK, which generally refers to a whole composed of multiple battery monomers, packaged and integrated through connectors, protection circuit boards (PCBs), housings, and other components. A battery pack (PACK) is a combination of multiple battery monomers to provide higher voltage, capacity, and power output. It is commonly used in various electronic devices, power tools, electric vehicles, and other applications that require large-capacity power supplies. The main function of a battery pack (PACK) is to connect multiple battery monomers together to form a whole to provide the required voltage and capacity. The PACK can also contain a battery management system (BMS) for monitoring and controlling the state of the battery pack, including voltage, current, temperature, and other parameters to ensure safe operation of the battery pack. The battery pack (PACK) usually has a housing to provide physical protection and facilitate installation. The PACK can also contain connectors for connecting the battery pack to the circuit between the device or charger. In summary, the PACK in the battery refers to a battery pack composed of multiple battery monomers, packaged and integrated through connectors, protection circuit boards, and housings, etc. components, used to provide the required voltage, capacity, and power output.

[0072] It should be noted that the flexible circuit board 2 inside the battery module is a highly reliable, flexible printed circuit board made of polyimide or polyester film as the base material, commonly known as soft board or FPC, with high wiring density, light weight, and thin thickness.

[0073] The present application also discloses a battery pack comprising the monomer battery of the above-mentioned embodiments. Therefore, it can have all the technical features and technical effects of the above-mentioned monomer battery, which will not be repeated here.

[0074] The present application also discloses a power consuming device comprising the monomer battery of the above-mentioned embodiments, or comprising the battery pack of the above-mentioned embodiments. Therefore, it can have all the technical features and technical effects of the above-mentioned monomer battery or battery pack, which will not be repeated here.

[0075] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0076] The monomer battery, battery module, battery pack, and power consuming device provided by the embodiments of the present application are described in detail above, and specific examples are applied to explain the principles and implementation modes of the present application. The above description of the embodiments is only to help understand the technical solutions and core ideas of the present application; those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A single cell, characterized by, The single battery comprises: a shell having a containing cavity; an electrode assembly arranged in the containing cavity; a cover plate assembly comprising a negative cover plate body, a positive cover plate body, a negative pole post terminal and a positive pole post terminal, the negative cover plate body and the positive cover plate body being arranged at both ends of the shell to seal the containing cavity, the negative pole post terminal penetrating through the negative cover plate body and being electrically connected with the electrode assembly, and the positive pole post terminal penetrating through the positive cover plate body and being electrically connected with the electrode assembly; a chip collecting module arranged on the side of the negative cover plate body away from the shell and connected with the negative pole post terminal, and the chip collecting module being connected with the negative cover plate body.

2. The cell according to claim 1, wherein The chip collecting module comprises: a first body arranged on the side of the negative cover plate body away from the shell and connected with the negative cover plate body; a collecting chip mounted on the side of the first body away from the negative cover plate body and connected with the first body; a first sutured aluminum wire having one end connected with the first body and the other end connected with the negative pole post terminal; a second sutured aluminum wire having one end connected with the first body and the other end connected with the negative cover plate body.

3. The cell according to claim 2, wherein The single battery further comprises an insulating member covering the shell, the positive cover plate body and the negative cover plate body. The single battery has a first avoiding groove, a second avoiding groove and a third avoiding groove penetrating through the insulating member along the thickness direction of the insulating member, the orthographic projection of the first avoiding groove on the negative cover plate body is larger than the orthographic projection of the negative pole post terminal on the negative cover plate body to expose the negative pole post terminal, the orthographic projection of the second avoiding groove on the positive cover plate body is larger than the orthographic projection of the positive pole post terminal on the positive cover plate body to expose the positive pole post terminal, and the orthographic projection of the third avoiding groove on the negative cover plate body is larger than the orthographic projection of the first body on the negative cover plate body to expose part of the negative cover plate body and the first body, and the second sutured aluminum wire is connected with the exposed part of the negative cover plate body.

4. The cell according to claim 3, wherein The single battery further has a fourth avoiding groove penetrating through the insulating member along the thickness direction of the insulating member, the fourth avoiding groove is communicated with the second avoiding groove and exposes part of the positive cover plate body. The single battery further comprises a third sutured aluminum wire having one end connected with the positive pole post terminal and the other end connected with the exposed part of the positive cover plate body.

5. The cell according to claim 4, wherein The positive pole post terminal has a second groove recessed along the thickness direction of the positive pole post terminal on the side close to the fourth avoiding groove, and the third sutured aluminum wire passes through the groove wall of the second groove and is connected with the positive pole post of the positive cover plate body and the positive pole post terminal respectively.

6. The cell according to claim 2, wherein The negative pole post terminal has a first groove recessed along the thickness direction of the negative pole post terminal on the side close to the third avoiding groove, and the first sutured aluminum wire passes through the groove wall of the first groove and is connected with the negative pole post of the first body and the negative pole post terminal respectively.

7. The cell according to claim 1, wherein The single battery further comprises: A first protective cover is arranged on the side of the negative cover plate body away from the shell and connected with the negative cover plate body, and the first protective cover covers the chip collection module and part of the negative pole terminal; A second protective cover is arranged on the side of the positive cover plate body away from the shell and connected with the positive cover plate body, and the second protective cover covers the connection between the positive pole terminal and the positive cover plate body.

8. A battery module, characterized by The battery module body comprises a plurality of single batteries as claimed in any one of claims 1 to 7, and the plurality of single batteries are arranged in sequence along the thickness direction of the single battery; A flexible circuit board is arranged around the outer wall of the battery module body, and the flexible circuit board passes through the positive pole terminal and the negative pole terminal of all the single batteries. The battery module comprises the single battery as claimed in any one of claims 1 to 7 or the battery module as claimed in claim 8.

9. A battery pack, characterized by, The battery pack comprises the single battery as claimed in any one of claims 1 to 7, the battery module as claimed in claim 8, or the battery module as claimed in claim 9.

10. An electric device, characterized by ​

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