Steel shell battery and electronic device

Abstract

The utility model discloses a steel shell battery and an electronic device. The steel shell battery comprises a battery cell, a circuit board and a connecting piece, the battery cell comprises a metal shell and an electrode assembly. The metal shell comprises a metal shell first surface. The electrode assembly comprises a positive tab and a negative tab, and the negative tab is electrically connected with the metal shell. The circuit board is provided with a first surface, a second surface opposite to the first surface, and a through hole extending from the first surface to the second surface. The circuit board is provided with a conductive part at the first surface at the position of the through hole. The connecting piece penetrates through the through hole from the first surface on the circuit board and extends into the metal shell, the circuit board is fixedly connected with the metal shell through the connecting piece, the connecting piece is insulated from the metal shell, and the positive tab is electrically connected with the conductive part through the connecting piece. The steel shell battery and the electronic device provided by the utility model can meet the requirements of the battery in a complex application environment, and provide more flexibility and cost benefits for the battery design.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of battery, in particular to a steel shell battery and electronic device. BACKGROUND

[0002] With the rapid development of portable electronic devices, electric vehicles and energy storage systems, the performance, safety and cost control of lithium ion batteries as the core components of energy storage become particularly important. In the manufacture of lithium ion batteries, steel shell packaging becomes the first choice for many application occasions due to its excellent mechanical strength and cost effectiveness. However, the connection mode between the internal components and the shell of the steel shell battery becomes one of the key factors affecting the overall performance and reliability of the battery.

[0003] In the prior art, the connection between the circuit board and the steel shell battery shell mainly relies on metal connecting pieces such as conductive sheets, which are respectively electrically connected with the battery pole and the metal shell to realize the electrical connection between the circuit board and the battery cell. This connection mode simplifies the assembly process of the battery pack to some extent, but has obvious defects in actual application.

[0004] The connection of the circuit board with the battery shell only through the conductive sheet may cause the conductive sheet to break due to mechanical stress when the battery is subjected to falling, impact or vibration, resulting in the failure of the electrical connection between the circuit board and the battery cell. This not only reduces the service life of the battery, but also may cause serious safety problems. In the use environment of the battery, especially in electric vehicles and energy storage systems, the battery needs to withstand frequent vibration and impact. The simple connection of the conductive sheet with the circuit board in the prior art cannot guarantee the firm fixation of the circuit board under these conditions, increasing the risk of battery failure. In order to enhance the fixation of the circuit board, additional structural parts and filling materials are needed, which increases the manufacturing complexity and material cost, and the filling process requires high production equipment and operating precision, further increasing the production cost.

[0005] Therefore, the circuit board connection mode in the prior art has obvious deficiencies in stability, vibration resistance and economy, and a new connection technology is needed to solve the fixation problem of the circuit board during the use of the battery, improve the durability and safety of the battery, and reduce the manufacturing cost. This has become a technical problem to be solved in the current lithium ion battery technology field. UTILITY MODEL CONTENT

[0006] The embodiment of the utility model provides a steel shell battery and electronic device. The steel shell battery and electronic device according to the utility model not only can meet the needs of the battery in complex application environment, but also provide more flexibility and cost effectiveness for battery design.

[0007] To address at least one of the aforementioned technical problems, one embodiment of the present invention provides a steel-cased battery, including a battery cell, a circuit board, and a connector. The battery cell includes a metal casing and an electrode assembly. The metal casing includes a first surface. The electrode assembly is encapsulated within the metal casing. The electrode assembly includes a positive electrode tab and a negative electrode tab, the negative electrode tab being electrically connected to the metal casing. The circuit board has a first surface, a second surface opposite to the first surface, and a through-hole extending from the first surface to the second surface, wherein a conductive portion is provided on the first surface at the location of the through-hole. The connector extends from the first surface through the through-hole into the metal casing, fixing the circuit board to the metal casing, wherein the connector is insulated from the metal casing, and electrically connects the positive electrode tab to the conductive portion via the connector.

[0008] According to a preferred embodiment of the present invention, the circuit board is riveted to the metal housing by means of a connector.

[0009] According to a preferred embodiment of the present invention, an insulating pad is provided between the circuit board and the metal housing, so that the connector passes through the insulating pad to insulate it from the metal housing.

[0010] According to a preferred embodiment of the present invention, an insulating gasket is provided inside the metal housing, so that the connector passes through the circuit board through hole, the insulating gasket, the positive electrode tab and the insulating gasket in sequence, and the circuit board, the positive electrode tab and the insulating gasket are all riveted to the metal housing.

[0011] According to a preferred embodiment of the present invention, the circuit board further includes conductive tabs that are electrically connected to the metal housing.

[0012] According to a preferred embodiment of the present invention, the conductive bow sheet is welded to the first surface of the metal shell.

[0013] According to a preferred embodiment of the present invention, the conductive bow sheet is laser-fused to the first surface of the metal shell.

[0014] According to a preferred embodiment of the present invention, the circuit board further includes a positive output terminal and a negative output terminal.

[0015] According to a preferred embodiment of the present invention, the steel-cased battery includes a protective cover, which is fixed to the steel-cased battery.

[0016] According to a preferred embodiment of the present invention, the circuit board is fixedly connected to the metal housing by means of the self-deformation of the connector extending into the metal housing.

[0017] Another embodiment of the present invention provides an electronic device comprising the steel-cased battery described herein. Attached Figure Description

[0018] Figure 1 This is an exploded perspective view showing the steel-cased battery according to the embodiment.

[0019] Figure 2 This is a schematic diagram showing the structure of the circuit board in the steel-cased battery according to the embodiment.

[0020] Figure 3 This is a schematic diagram showing the structure of the circuit board in the steel-cased battery according to the embodiment.

[0021] Figure 4 It shows Figure 1 The diagram shows a cross-sectional view of a steel-cased battery.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10: Battery cell; 110: Metal casing; 111: First surface; 120: Electrode assembly; 121: Positive electrode tab; 122: Negative electrode tab; 40: Circuit board; 401: First surface of circuit board; 402: Second surface of circuit board; 403: Through hole of circuit board; 4031: Conductive part; 4032: Second conductive part; 50: Connector; 60: Insulating pad; 112: Insulating gasket; 404: Conductive tab; 405: Positive output terminal; 406: Negative output terminal; 410: Circuit board body; 70: Protective cover. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will be described in detail below with reference to the embodiments. The following embodiments are merely exemplary and do not constitute a limitation on the scope of protection of the present invention.

[0025] As explained in the background section, existing circuit board connection methods have significant shortcomings in terms of stability, vibration resistance, and economy. According to a typical aspect of this utility model, a steel-cased battery is provided, comprising a battery cell 10, a circuit board 40, and a connector 50. (Refer to...) Figure 1 As the core component of the battery, the cell 10 includes a metal casing 110 and an electrode assembly 120 (in... Figure 4 (as shown in the image).

[0026] The metal casing 110, serving as the encapsulation container for the battery cell, provides mechanical protection and structural support. The metal casing 110 has a first surface 111 for electrical and mechanical connection to the circuit board 40. In some embodiments of this invention, the metal casing 110 may be made of stainless steel, aluminum, or other metallic materials with sufficient mechanical strength and electrical conductivity to ensure battery stability and achieve good electrical performance.

[0027] ReferenceFigure 4 The electrode assembly 120 is encapsulated within the metal housing 110 and serves as a key component for battery energy conversion. The electrode assembly 120 includes a positive tab 121 and a negative tab 122, wherein the negative tab 122 is electrically connected to the metal housing 110, while the positive tab 121 is used to establish an electrical connection with an external circuit.

[0028] The circuit board 40 serves as the carrier of the battery management system, responsible for monitoring and controlling the charging and discharging process of the battery, as well as communication with external devices. The circuit board 40 has a first surface 401, a second surface 402 opposite to the first surface, and a through hole 403 extending from the first surface 401 to the second surface 402.

[0029] The first surface 401 of the circuit board faces away from the first surface 111 of the metal housing 110 and is used to arrange the connector 50 and make electrical contact with the positive electrode 121. The first surface 111 also serves to mount electronic components and circuitry on the circuit board. The second surface 402 of the circuit board, opposite to the first surface 111, faces the first surface 111 of the metal housing 110 and is in direct contact with it. A through-hole 403 extends from the first surface 401 to the second surface 402 and is used for the insertion and fixation of the connector 50. A conductive portion 4031 is provided on the first surface 401 at the location of the through-hole 403. This conductive portion 4031 is electrically connected to the positive electrode 121 via the connector 50.

[0030] The connector 50 is a key component for achieving the electrical and mechanical connection between the circuit board 40 and the metal housing 110. The connector 50 extends from the first surface 401 of the circuit board 40 through the through hole 403 into the metal housing 110, thereby fixing the circuit board 40 and the metal housing 110 together.

[0031] The connector 50 is insulated from the metal housing 110, avoiding the risk of short circuits that may be caused by direct electrical connection. At the same time, the connector 50 enables the positive electrode tab 121 to be electrically connected to the conductive part 4031 on the circuit board, thereby completing the establishment of the positive electrode circuit.

[0032] This steel-cased battery design, by introducing a connector 50 between the circuit board 40 and the metal casing 110, not only simplifies the battery assembly process and reduces reliance on traditional conductive sheets, but also significantly improves the fixing strength of the circuit board 40 inside the battery, enhancing the battery's stability and safety in harsh environments. Simultaneously, by providing insulation between the connector 50 and the metal casing 110 at the through-hole 403 of the circuit board, a reliable electrical connection is achieved between the positive electrode tab 121 and the conductive part 4031 of the circuit board, avoiding electrical faults that may result from direct contact with the metal casing, further improving the overall battery performance and user experience. This connection mechanism not only meets the needs of batteries in complex application environments but also provides greater flexibility and cost-effectiveness for battery design.

[0033] In a further embodiment of this utility model, the circuit board 40 is riveted to the metal housing 110 by the connector 50. This design not only strengthens the mechanical connection between the circuit board and the metal housing, but also optimizes the battery assembly process and structural stability.

[0034] The connector 50 secures the circuit board 40 to the metal housing 110 using a riveting method. Compared to traditional welding or bonding methods, riveting provides a more robust physical fixation, significantly improving the circuit board's resistance to displacement under external forces (such as drops, impacts, or vibrations), reducing the risk of conductive sheet breakage, and enhancing battery durability and reliability. The connector 50 is designed with electrical isolation in mind, ensuring electrical insulation between the circuit board and the metal housing even in direct contact, preventing short circuits caused by contact and improving battery safety. This design is particularly suitable for batteries that need to operate without insulating fillers, ensuring electrical safety even in extreme environments. Using the connector 50 for riveting eliminates the need for protective components and insulating fillers required by traditional filling processes, simplifying the internal battery structure, reducing gaps between components, and making the battery design more compact. This space optimization not only facilitates overall battery miniaturization but also increases the energy density of the battery pack, offering significant advantages for applications such as electric vehicles and portable electronic devices. Because riveting is more direct and efficient than dispensing, potting, or low-pressure injection molding, it reduces material consumption and process steps, thus lowering manufacturing costs. Furthermore, the application of automated riveting equipment can significantly improve production efficiency, shorten battery assembly cycles, and contribute to cost control and quality consistency in large-scale production.

[0035] In a further embodiment of this utility model, see Figure 1An insulating pad 60 is provided between the circuit board 40 and the metal housing 110, allowing the connector 50 to pass through the insulating pad 60 to insulate it from the metal housing 110. This design is for both electrical safety and mechanical fixation, enabling the connector 50 to pass through the insulating pad 60 to form an insulated and secure mechanical connection with the metal housing 110. In a preferred embodiment, the insulating pad 60 extends into the circuit board through-hole 403 of the circuit board 40 and the corresponding hole in the metal housing 110.

[0036] The insulating pad 60 ensures electrical insulation between the connector 50 and the metal casing 110. Even under extreme conditions, such as abnormally high internal battery temperatures or liquid infiltration, it effectively prevents short circuits between the circuit board 40 and the metal casing, significantly improving battery safety. This design is particularly suitable for applications with stringent electrical safety requirements, such as electric vehicles, medical devices, and aerospace. The insulating pad 60 not only provides electrical isolation but also acts as a transition layer between the connector 50 and the circuit board through-hole 403. Through its pre-designed shape and material properties, it can withstand the mechanical pressure of the connector 50 passing through while maintaining the integrity and stability of the circuit board through-hole 403. This improved mechanical stability helps secure the circuit board within the battery, reducing circuit board displacement or damage caused by vibration or impact, and enhancing battery reliability in complex operating environments.

[0037] The material selection for the insulating pad 60 should take into account insulation performance, mechanical strength, chemical stability, and compatibility with the battery environment. In different embodiments of this utility model, the material of the insulating pad 60 may be selected from polytetrafluoroethylene (PTFE), polyimide (PI), epoxy resin, polycarbonate (PC), polyethylene terephthalate (PET), or liquid silicone rubber (LSR).

[0038] In embodiments including the insulating pad 60, refer to Figure 4The steel-cased battery of this invention also includes an insulating gasket 112 inside the metal casing 110. The insulating gasket 112 further enhances the electrical isolation and mechanical fixation between the internal components of the steel-cased battery. The insulating gasket 112 serves as an additional insulating layer between the connector 50, the positive electrode tab 121, and the metal casing 110. An insulating gasket 60 is already provided within the circuit board through-hole 403, one of its functions being to ensure electrical isolation between the connector 50 and the circuit board 40. The insulating gasket 112, located inside the battery directly between the metal casing 110 and the positive electrode tab 121, provides a second layer of electrical isolation. This double-isolation design not only significantly reduces the risk of internal short circuits in the battery but also enhances the battery's safety in harsh environments. The connector 50 passes sequentially through the circuit board through-hole 403, the insulating gasket 60, the positive electrode tab 121, and the insulating gasket 112, and is finally fixed to the metal casing 110 by riveting. This process not only ensures a stable mechanical connection between the circuit board 40 and the metal casing 110, but also achieves multi-point fixation between the circuit board, the positive electrode tab, and the metal casing through the insulating gasket 112, improving the overall structural stability and impact resistance. The size and shape of the insulating gasket 112 match the connection points between the positive electrode tab 121 and the metal casing 110. Its introduction does not increase the internal space occupied by the battery; on the contrary, through precise design, it promotes a compact layout of the internal components of the battery, helping to achieve the goals of battery miniaturization and high energy density. In different embodiments of this utility model, the material of the insulating gasket 112 can be selected from polyethylene (PE), polyimide (PI), polytetrafluoroethylene (PTFE), epoxy resin, polycarbonate (PC), polyethylene terephthalate (PET), silicone rubber, or ceramic.

[0039] See Figure 2 and Figure 3 The circuit board 40 may also include a conductive tab 404. The conductive tab is electrically connected to the metal housing 110. The second surface 402 of the circuit board 40 may also have a second conductive portion 4032, and the conductive tab 404 is electrically connected to the second conductive portion 4032.

[0040] The conductive bow 404, made of a flexible metallic material, provides electrical contact with the metal casing 110, maintaining a reliable electrical connection even when subjected to vibration or impact within the battery pack. This design fully utilizes the elastic properties of the conductive bow, effectively avoiding breakage or poor contact caused by mechanical stress in traditional welded joints or hard connections, thus improving the battery's electrical performance stability in harsh environments. The three-dimensional elastic structure of the conductive bow 404 allows it to achieve tight contact with the metal casing within a limited space. Even when internal battery components experience slight expansion or contraction due to temperature changes, the conductive bow maintains a good electrical connection with the metal casing. This design not only enhances mechanical adaptability but also optimizes the internal spatial layout of the battery, facilitating miniaturization and high performance.

[0041] The second surface 402 of the circuit board 40 may also have a second conductive portion 4032. The design of the second conductive portion 4032 allows the conductive tab 404 to form a more complex circuit network with other electrical components on the circuit board. The second conductive portion 4032 can be a pad, metal contact, or conductive via, etc. Through electrical connection with the conductive tab 404, it not only enhances the electrical signal transmission capability between the circuit board and the metal housing 110, but also provides multiple electrical paths, improving circuit redundancy and reliability. The elastic contact between the conductive tab 404 and the metal housing 110, as well as its integration with the second conductive portion 4032, ensures the electrical performance stability and connection reliability of the battery under various operating conditions. This design not only improves the battery's electrical efficiency but also enhances the monitoring accuracy of the battery management system (BMS), which has a significant impact on the long-term operation and safety of the battery.

[0042] In some embodiments of this invention, the conductive tab 404 is welded to the first surface 111 of the metal casing 110. The welding between the conductive tab 404 and the first surface 111 of the metal casing 110 can be achieved using various welding techniques, such as laser welding, ultrasonic welding, or resistance welding. These welding techniques ensure that electrical connection is achieved without causing thermal damage or physical destruction to other components of the battery, thus guaranteeing the overall safety and performance of the battery.

[0043] The welding points of the conductive bow piece 404 are located on the first surface 111, preferably on the second conductive portion 4032. By welding the conductive bow piece 404 to the first surface 111, this invention overcomes the risk of breakage that may occur in conventional conductive sheets during drop, impact, or vibration tests. Welding provides a more robust mechanical connection than dispensing or injection molding, ensuring that electrical signal transmission between the circuit board and the battery casing remains unaffected under various harsh conditions. In this invention, the structure of the circuit board 40 is simplified by welding the conductive bow piece 404 to the first surface 111, eliminating unnecessary fillers and fasteners, thereby reducing production costs and assembly complexity. This design also reduces potential failure points, improving the overall reliability and cost-effectiveness of the battery.

[0044] In some other embodiments of this invention, the conductive bow 404 is laser-welded to the first surface 111 of the metal casing 110. Laser welding precisely concentrates heat at the contact area between the conductive bow 404 and the first surface 111, avoiding thermal damage to surrounding materials or components and ensuring the integrity and safety of the battery's internal structure. The weld joint formed by laser welding has extremely high mechanical strength and electrical conductivity, capable of withstanding vibrations, impacts, and temperature changes during battery use, maintaining a stable and reliable electrical connection between the circuit board 40 and the metal casing. Furthermore, laser welding technology is easier to automate, reduces human error, improves the efficiency and consistency of battery assembly, and is beneficial for large-scale production.

[0045] In an embodiment of this utility model, the circuit board 40 further includes a positive output terminal 405 and a negative output terminal 406; preferably, both the positive output terminal 405 and the negative output terminal 406 are located on the first surface 401 of the circuit board 40. The positive output terminal 405 and the negative output terminal 406 are the terminal points on the circuit board 40 used to establish electrical connections with external circuits. They transmit the electrical energy inside the battery to the external load in a safe and controllable manner, and receive electrical energy from the external power source during charging, ensuring that the battery can charge and discharge normally and perform its basic functions of storing and releasing electrical energy. To ensure good electrical performance and mechanical stability, the positive output terminal 405 and the negative output terminal 406 are usually made of metal materials with good conductivity, high mechanical strength, and corrosion resistance, such as copper, silver-plated copper, or stainless steel. Their design needs to consider compatibility with external connectors, ensuring sufficient contact area, low contact resistance, and stable connection, while also taking into account aesthetics and space utilization efficiency.

[0046] The positive output terminal 405 and negative output terminal 406 integrated on circuit board 40, in addition to serving as electrical interfaces, also carry multiple electrical safety and protection functions. For example, they may be equipped with overcurrent protection, short-circuit protection, or temperature protection circuits to prevent electrical damage under abnormal charging and discharging conditions, protecting the battery and external devices. Signal transmission and control: The positive output terminal 405 and negative output terminal 406 are not only used for power transmission, but may also contain signal transmission lines for communicating with the battery management system (BMS) or other control units to report battery status (such as voltage, current, and temperature) or receive control signals. This design ensures intelligent battery management, improving battery efficiency and safety.

[0047] The steel-cased battery of this invention may further include a protective cover 70. The protective cover 70 is typically made of a non-metallic material with high insulating properties, such as polycarbonate (PC), polyimide (PI), or polyetheretherketone (PEEK). These materials not only provide good electrical isolation but also possess excellent mechanical strength and high-temperature resistance, effectively resisting external impacts and deformation that may occur under high-temperature environments. The protective cover 70 is precisely attached to the steel-cased battery using methods such as snap-fit, threaded connection, heat-sealing adhesive, or magnetic adsorption. These methods ensure the stability of the protective cover under various operating conditions, while the easy-to-disassemble design facilitates battery maintenance and inspection.

[0048] The protective cover 70 covers the exterior of the circuit board 40, particularly its positive output terminal 405 and negative output terminal 406, as well as the connection areas with other electrical components of the steel-cased battery. This design effectively prevents short circuits caused by external moisture, dust, or metal fragments, significantly reducing electrical safety risks. The structural design of the protective cover 70 also considers the battery's thermal management requirements. Inside the protective cover, airflow channels or heat sinks can be installed to promote rapid heat dissipation from the battery's interior, helping to maintain the battery within a safe temperature range, extending battery life, and improving battery performance. In addition to providing electrical isolation, the protective cover 70's structure can also absorb external impacts, reducing damage to internal battery components caused by drops or vibrations, and ensuring the battery maintains good mechanical stability in complex and changing operating environments.

[0049] In a preferred embodiment of this invention, the circuit board 40 is fixedly connected to the metal housing 110 by means of the self-deformation of the connector 50 extending into the metal housing 110. This fixed connection to the metal housing 110 is achieved through its own deformation. This deformation can be achieved through riveting, crimping, or a pre-set bolt structure, ensuring that the circuit board 40 is stably fixed to the metal housing 110, maintaining good electrical contact and mechanical stability even when subjected to drops, impacts, or vibrations.

[0050] In another aspect of this invention, an electronic device is provided that includes the steel-cased battery described in this invention.

[0051] One embodiment of this utility model is summarized as follows:

[0052] First, the insulating pad 60 (polyethylene terephthalate) is precisely installed into the first opening of the metal housing 110. The insulating pad 60 ensures insulation between the connector 50 and the metal housing 110, preventing short circuits. Then, the first surface 401 of the circuit board 40 is positioned outwards, and the second surface 402 of the circuit board is in contact with the first surface 111 of the metal housing 110 to form a stable mechanical connection. The circuit board 40 has pre-drilled through-holes 403, which are aligned with the first opening of the metal housing 110 to facilitate the installation of subsequent components. The first surface 401 of the circuit board 40 also has a positive output terminal 405, a negative output terminal 406, and a conductive portion 4031, wherein conductive tabs 404 are soldered to the first surface 111 of the metal housing 110. The conductive tabs 404 are made of a flexible metal material, ensuring a reliable electrical connection with the metal housing 110 while providing mechanical stability, especially when the battery is subjected to vibration or impact. The metal housing 110 encapsulates the electrode assembly 120, which includes a positive tab 121 and a negative tab 122, wherein the negative tab 122 is electrically connected to the metal housing 110. In addition, an insulating gasket 112 (polyethylene) is located between the metal housing 110 and the positive tab 121 to enhance electrical isolation and mechanical support. Next, the connector 50 (aluminum alloy (AL5052)) is sequentially passed through the circuit board through-hole 403, insulating pad 60, positive electrode tab 121, and insulating gasket 112, and finally fixed to the metal casing 110 by riveting. The riveted connector 50 not only ensures the electrical connection between the conductive part 4031 and the positive electrode tab 121, but also achieves electrical isolation from the metal casing 110 with the help of the insulating pad 60 and insulating gasket 112, thereby enhancing overall safety. After fixing the connector, electrolyte is poured in through another opening in the metal casing 110. After the filling process, a welding plug is used to seal the filling port to ensure the airtightness of the battery's internal environment and prevent electrolyte leakage. Subsequently, the output wires are welded to the positive output terminal 405 and the negative output terminal 406 of the circuit board 40, respectively. This step provides a channel for external power output to the battery, ensuring the normal charging and discharging function of the battery. Finally, to further improve the battery's protection level and extend its service life, a protective cover 70 is used to encapsulate the entire battery cell 10.

[0053] While one embodiment of the present invention has been described, it is provided merely as an example and is not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, with various omissions, substitutions, and modifications possible without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, as well as the scope of the claims and their equivalents.

Claims

1. A steel-cased battery, characterized in that, include: Battery cell (10), including: A metal housing (110) including a first surface (111) of the metal housing; An electrode assembly (120) is encapsulated within the metal housing (110). The electrode assembly (120) includes a positive electrode tab (121) and a negative electrode tab (122), and the negative electrode tab (122) is electrically connected to the metal housing (110). A circuit board (40) has a first surface (401), a second surface (402) opposite to the first surface, and a through-hole (403) extending from the first surface (401) to the second surface (402), wherein a conductive portion (4031) is provided on the first surface (401) at the location of the through-hole (403); and A connector (50) extends from the first surface (401) of the circuit board (40) through a through hole (403) into the metal housing (110), thereby fixing the circuit board (40) to the metal housing (110). The connector (50) is insulated from the metal housing (110) and the positive electrode tab (121) is electrically connected to the conductive part (4031) through the connector (50).

2. The steel-cased battery according to claim 1, characterized in that, The circuit board (40) is riveted to the metal housing (110) via the connector (50).

3. The steel-cased battery according to claim 1, characterized in that, An insulating pad (60) is provided between the circuit board (40) and the metal housing (110), so that the connector (50) passes through the insulating pad (60) to insulate itself from the metal housing (110).

4. The steel-cased battery according to claim 3, characterized in that, An insulating pad (112) is provided inside the metal housing (110), so that the connector (50) passes through the circuit board through hole (403), the insulating pad (60), the positive electrode tab (121) and the insulating pad (112) of the circuit board (40) in sequence, and the circuit board (40), the positive electrode tab (121) and the insulating pad (112) are all riveted to the metal housing (110).

5. The steel-cased battery according to claim 1, characterized in that, The circuit board (40) also includes a conductive tab (404) electrically connected to the metal housing (110).

6. The steel-cased battery according to claim 5, characterized in that, The conductive bow sheet (404) is welded to the first surface (111) of the metal housing (110).

7. The steel-cased battery according to claim 5, characterized in that, The conductive bow sheet (404) is laser-fused to the first surface (111) of the metal housing (110).

8. The steel-cased battery according to claim 1, characterized in that, The circuit board (40) also includes a positive output terminal (405) and a negative output terminal (406).

9. The steel-cased battery according to claim 1, characterized in that, The steel-cased battery includes a protective cover (70) which is fixed to the steel-cased battery.

10. The steel-cased battery according to claim 1, characterized in that, By means of the deformation of the connector (50) extending into the metal housing (110), the circuit board (40) is fixedly connected to the metal housing (110).

11. An electronic device, characterized in that, The electronic device includes a steel-cased battery according to any one of claims 1-10.

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