A constant voltage rechargeable battery which is easy to assemble

Abstract

A constant-voltage rechargeable battery that is easy to assemble comprises a PCB step-down protection board, a rechargeable battery cell, and a steel casing. A first connection structure is provided between the PCB step-down protection board and the rechargeable battery cell, and a current-collecting structure for conduction is provided between the rechargeable battery cell and the steel casing. The current-collecting structure includes a current-collecting abutment and a current-collecting structure body, with the current-collecting abutment connected to the current-collecting structure body. The rechargeable battery cell has a positive terminal and a negative terminal. The positive terminal is connected to the positive terminal of the step-down protection board via the first connection structure. The negative terminal is connected to the current-collecting structure body relative to the current-collecting abutment, and the current-collecting abutment is connected to the steel casing. The steel casing connects to the negative terminal of the step-down protection board, thus conducting the circuitry of the constant-voltage rechargeable battery. This solution adopts a modular structural design, achieving the effects of optimizing the overall structure of the constant-voltage rechargeable battery, improving its production efficiency, and reducing the overall assembly difficulty.

Description

Technical Field

[0001] This utility model belongs to the technical field of constant voltage rechargeable batteries, and particularly relates to a constant voltage rechargeable battery that is easy to assemble. Background Technology

[0002] With the development of technology, the production of constant voltage rechargeable batteries is becoming increasingly automated. However, the assembly of existing constant voltage rechargeable battery components is too complex, which is not conducive to the automated assembly of constant voltage rechargeable batteries and results in low production efficiency. Therefore, this utility model proposes a new solution to the above-mentioned technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a constant-voltage rechargeable battery that is easy to assemble. It adopts a modular structural design, which optimizes the overall structure of the constant-voltage rechargeable battery, improves the production efficiency of the constant-voltage rechargeable battery, and reduces the overall assembly difficulty of the constant-voltage rechargeable battery.

[0004] Based on this, the present invention provides a constant voltage rechargeable battery that is easy to assemble, comprising:

[0005] The system includes a PCB step-down protection board, a rechargeable battery cell, and a steel shell. A first connection structure is provided between the PCB step-down protection board and the rechargeable battery cell, and a current-collecting structure for conducting electricity is provided between the rechargeable battery cell and the steel shell.

[0006] The current collection structure is provided with a current collection abutment end and a current collection structure body, and the current collection abutment end is connected to the current collection structure body;

[0007] The rechargeable battery cell has a positive terminal and a negative terminal. The positive terminal is connected to the positive terminal of the step-down protection board of the PCB through the first connection structure. The negative terminal is connected to the current collector body relative to the current collector abutment end. The current collector abutment end is connected to the steel shell and is connected to the negative terminal of the step-down protection board through the steel shell to conduct the circuit of the constant voltage rechargeable battery.

[0008] As described above, in a constant voltage rechargeable battery that is easy to assemble, the current collector abutment end is designed with an elastic structure, and the current collector abutment end is provided with an elastic connecting part and an elastic abutment plane part. The elastic connecting part is connected to the current collector structure body, and the elastic abutment plane part is connected to the elastic connecting part and abuts against the steel shell conductive circuit.

[0009] As described above, in a type of constant-voltage rechargeable battery that is easy to assemble, the first connection structure is a first connection tab, one end of which is connected to the positive terminal of the step-down protection plate, and the other end is connected to the positive terminal of the battery cell.

[0010] As described above, a constant-voltage rechargeable battery that is easy to assemble also includes conductive foamed nickel. The current collector body is provided with a second tab, which is connected to the current collector body and connected to the negative terminal of the battery cell. The current collector body is connected to the conductive foamed nickel through the current collector abutment end. The conductive foamed nickel is connected to the steel shell and connected to the negative terminal of the step-down protection board through the steel shell to conduct the circuit.

[0011] As described above, a constant-voltage rechargeable battery that is easy to assemble includes a current collector structure body with multiple current collector holes, and multiple current collector abutment ends connected to one side of the current collector holes and connected to the conductive foamed nickel.

[0012] As described above, in an easy-to-assemble constant-voltage rechargeable battery, the PCB step-down protection board is provided with a Type-C interface for fast charging. The Type-C interface is connected to the PCB step-down protection board, and the rechargeable battery cell is charged through the Type-C interface.

[0013] As described above, an easy-to-assemble constant-voltage rechargeable battery further includes a battery support structure. The battery support structure is provided with a conductive element and a battery support frame. The conductive element is connected to the battery support frame. The battery support frame is connected to the PCB step-down protection board. The conductive element is connected to the negative terminal of the step-down protection board. The steel shell is connected to the conductive element to conduct the circuit.

[0014] As described above, in a type of constant-voltage rechargeable battery that is easy to assemble, the first connection structure is further provided with a first insulating gasket for limiting the PCB step-down protection board, and the first insulating gasket is provided with a first sealing snap-fit ​​groove; the PCB step-down protection board is installed in the first sealing snap-fit ​​groove and connected to the positive electrode of the battery cell.

[0015] As described above, a constant-voltage rechargeable battery that is easy to assemble also includes a battery insulating film, which covers the outer surface of the steel shell; the steel shell is provided with a steel shell roller groove for limiting the PCB step-down protection board and the first connecting structure, and the steel shell roller groove is provided with a roller groove connecting end, which is directly or indirectly connected to the conductive circuit of the PCB step-down protection board.

[0016] Implementing the embodiments of this utility model has the following beneficial effects:

[0017] This solution adopts a modular structural design, featuring a first connection structure and a current collector structure. The current collector structure includes a current collector abutment end and a current collector structure body. The current collector abutment end is connected to the current collector structure body. The positive terminal of the rechargeable battery cell is connected to the positive terminal of the step-down protection board on the PCB through the first connection structure. The negative terminal of the cell is connected to the current collector structure body relative to the current collector abutment end. The current collector structure body is connected to the steel shell through the current collector abutment end. The steel shell is connected to the negative terminal of the step-down protection board to conduct the circuit. This modular design of the battery as a whole simplifies the assembly process of the constant voltage rechargeable battery, facilitating the sequential assembly of the constant voltage rechargeable battery by automated equipment. This effectively improves the assembly convenience of automated equipment, achieving the effects of optimizing the overall structure of the constant voltage rechargeable battery, increasing the production efficiency of the constant voltage rechargeable battery, and reducing the overall assembly difficulty of the constant voltage rechargeable battery. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0020] Figure 2 For the corresponding Figure 1 A structural diagram from another direction;

[0021] Figure 3 This is an exploded view of the structure of Embodiment 1 of this utility model;

[0022] Figure 4 For the corresponding Figure 3 A structural diagram from another direction;

[0023] Figure 5 For the corresponding Figure 4 Enlarged view of the A-section structure;

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0025] Figure 7 For the corresponding Figure 6 BB cross-sectional view;

[0026] Figure 8 This is an exploded view of the structure of Embodiment 2 of this utility model;

[0027] Figure 9 correspond Figure 8A structural diagram from another direction;

[0028] Figure 10 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0029] Figure 11 correspond Figure 10 A structural diagram from another direction;

[0030] Figure 12 For the corresponding Figure 11 CC section view;

[0031] Figure 13 This is an exploded view of the structure of Embodiment 3 of this utility model;

[0032] Figure 14 correspond Figure 13 A structural diagram from another direction;

[0033] Figure 15 This is a schematic diagram of the structure of Embodiment 6 of the present invention;

[0034] Figure 16 This is an exploded view of the structure of Embodiment 6 of this utility model;

[0035] Figure 17 For the corresponding Figure 16 Enlarged view of the structure of part D;

[0036] Figure 18 correspond Figure 16 A schematic diagram of the structure from another direction.

[0037] In the diagram: 1-PCB step-down protection board, 11-negative step-down board connection position, 12-Type-C interface; 2-rechargeable battery cell; 3-steel shell, 31-steel shell roller groove, 311-roller groove connection end; 41-first insulating washer, 411-first sealing snap groove, 42-first connecting tab, 43-second insulating pad; 51-current collector abutment end, 511-elastic connection part, 512-elastic abutment plane part, 52-current collector structure body, 521-second tab, 522-current collector flow hole, 54-conductive foamed nickel; 6-battery support structure, 61-conductive component, 611-first conductive connection part, 612-second conductive connection part, 62-battery support frame. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] like Figures 1 to 18 As shown, this embodiment of the present invention provides a constant voltage rechargeable battery that is easy to assemble, comprising:

[0040] A PCB step-down protection board 1, a rechargeable battery cell 2, and a steel shell 3 are characterized in that a first connection structure is provided between the PCB step-down protection board 1 and the rechargeable battery cell 2, and a current-collecting structure for conducting electricity is provided between the rechargeable battery cell 2 and the steel shell 3; the current-collecting structure has a current-collecting abutment end 51 and a current-collecting structure body 52, the current-collecting abutment end 51 being connected to the current-collecting structure body 52; the rechargeable battery cell 2 has a positive electrode and a negative electrode, the positive electrode being connected to the PCB step-down protection board 1 through the first connection structure. The positive terminal of the step-down protection board; the negative terminal of the cell is connected to the current collector abutment terminal 51 on the current collector structure body 52. ​​The current collector abutment terminal 51 is connected to the steel shell 3, and the circuit of the constant voltage rechargeable battery is conducted through the steel shell 3 connected to the negative terminal of the step-down protection board, so as to modularize the constant voltage rechargeable battery, thereby optimizing the overall structure of the constant voltage rechargeable battery, making the constant voltage rechargeable battery easy to automate production, thereby improving the production efficiency of the constant voltage rechargeable battery, increasing the capacity of the constant voltage rechargeable battery, and reducing the overall assembly difficulty of the constant voltage rechargeable battery.

[0041] Example 1:

[0042] Specifically, the negative terminal of the voltage reduction protection plate is a circular design to facilitate connection with the steel shell 3; the current collecting abutment end 51 is an elastic structure design to ensure a tight fit between the current collecting abutment end 51 and the inner wall of the steel shell 3 through elastic force, thereby ensuring the stability of the internal electrical connection of the constant voltage rechargeable battery; in this embodiment of the present invention, the number of current collecting abutment ends 51 is preferably three, so as to ensure the stability of the connection process between the current collecting abutment end 51 and the steel shell 3 through a triangular support method; the current collecting abutment end 51 is provided with an elastic connecting part 511 and an elastic abutting plane part 512. The elastic connecting part 511 is connected to the current collecting structure body 52, and the elastic abutting plane part 512 is connected to the elastic connecting part 511 and abuts against the steel shell 3, so as to increase the connection between the current collecting structure and the steel shell 3 through the elastic abutting plane part 512. The contact area ensures good electrical conductivity between the current collector structure and the steel shell 3, avoiding power transmission interruption or reduced transmission efficiency due to poor contact. At the same time, the design of the elastic abutment plane 512 can also adapt to certain tolerances and deformations, ensuring that it can smoothly abut against the steel shell 3 during the assembly of the constant voltage rechargeable battery, so as to maintain a stable electrical connection.

[0043] Furthermore, the first connection structure is a first connection tab 42. One end of the first connection tab 42 is connected to the positive terminal of the step-down protection board, and the other end is connected to the positive terminal of the battery cell. This facilitates the connection of the two ends of the first connection tab 42 to the PCB step-down protection board 1 and the rechargeable battery cell 2 by welding, thereby ensuring the stability of the connection between the PCB step-down protection board 1 and the rechargeable battery cell 2, and thus ensuring the stability of the constant voltage rechargeable battery power supply. At the same time, it simplifies the structural composition of the constant voltage rechargeable battery, facilitates automated assembly, and improves production efficiency.

[0044] Example 2:

[0045] Compared to Example 1, Example 2 further includes a first insulating washer 41. The first insulating washer 41 has a first sealing groove 411. The PCB step-down protection board 1 is installed in the first sealing groove 411 to limit the PCB step-down protection board 1 through the first insulating washer 41, preventing the PCB step-down protection board 1 from shifting during the shaking of the constant voltage rechargeable battery, thereby enhancing the stability of the constant voltage rechargeable battery power supply.

[0046] Example 3:

[0047] Furthermore, the constant-voltage rechargeable battery provided in Embodiment 3 of this utility model, which is easy to assemble, also includes conductive foamed nickel 54. The current collector body 52 is provided with a second tab 521, which is connected to the current collector body 52 and connected to the negative terminal of the battery cell. The current collector body 52 is connected to the conductive foamed nickel 54 through the current collector abutment end 51. The conductive foamed nickel 54 is connected to the steel shell 3 and is connected to the negative terminal of the step-down protection board through the steel shell 3 to conduct the circuit. By increasing the conductive foamed nickel 54, the connection gap between the current collector body 52 and the steel shell 3 is effectively reduced, thereby enhancing the stability of the connection between the current collector body 52 and the steel shell 3, and facilitating the improvement of the power supply stability of the constant-voltage rechargeable battery.

[0048] Furthermore, the current collecting structure body 52 is also provided with a plurality of current collecting holes 522, and a plurality of current collecting abutment ends 51 are connected to one side of the current collecting holes 522 and connected to the conductive foamed nickel 54. In embodiment 3 of this utility model, the current collecting abutment ends 51 are connection burrs formed around the current collecting holes 522 after being stamped by a stamping machine. The current collecting structure body 52 is connected to the conductive foamed nickel 54 through the current collecting abutment ends 51, which on the one hand enhances the stability of the connection between the current collecting structure body 52 and the conductive foamed nickel 54, and on the other hand enhances the stability of the electrical connection between the current collecting structure body 52 and the steel shell 3, which facilitates the automated assembly of constant voltage rechargeable batteries.

[0049] Furthermore, the first connection structure includes a first connecting tab 42 and a first insulating washer 41 for limiting the PCB step-down protection board 1. The first insulating washer 41 has a first sealing groove 411. The PCB step-down protection board 1 is installed in the first sealing groove 411 so that the first insulating washer 41 limits the PCB step-down protection board 1 and prevents the PCB step-down protection board 1 from shifting during the shaking of the constant voltage rechargeable battery, thereby enhancing the stability of the constant voltage rechargeable battery power supply. One end of the first connecting tab 42 is connected to the positive terminal of the step-down protection board, and the other end passes through the first sealing groove 411 and is connected to the positive terminal of the battery cell. This facilitates the welding of the two ends of the first connecting tab 42 to the PCB step-down protection board 1 and the rechargeable battery cell 2, respectively, to ensure the stability of the connection between the PCB step-down protection board 1 and the rechargeable battery cell 2, thereby ensuring the stability of the constant voltage rechargeable battery power supply. At the same time, it simplifies the structural composition of the constant voltage rechargeable battery, facilitates automated assembly, and improves production efficiency.

[0050] Example 4:

[0051] Compared with Embodiment 3, Embodiment 4 of this utility model has only a first connecting tab 42 in the first connecting structure. The first connecting tab 42 directly connects the positive terminal of the step-down protection board and the positive terminal of the cell by welding. By optimizing the overall structure of the constant voltage rechargeable battery, the battery capacity of the constant voltage rechargeable battery is effectively improved, and the convenience of automated mass production of constant voltage rechargeable batteries is improved by simplifying the assembly steps.

[0052] Example 5:

[0053] Compared with Embodiment 3, Embodiment 5 of this utility model omits the conductive foamed nickel 54, and the current collector structure body 52 is directly connected to the steel shell 3 through the current collector abutment end 51. By optimizing the overall structure of the constant voltage rechargeable battery, it is convenient to improve the automated mass production of constant voltage rechargeable batteries by simplifying the assembly steps.

[0054] Example 6:

[0055] Furthermore, the PCB step-down protection board 1 is provided with a Type-C interface 12 for fast charging. The Type-C interface 12 is connected to the PCB step-down protection board 1, and the rechargeable battery cell 2 is charged through the Type-C interface 12. By adding the Type-C interface 12, the charging convenience of the constant voltage rechargeable battery is improved.

[0056] Furthermore, Embodiment 6 of this utility model provides an easy-to-assemble constant-voltage rechargeable battery, which also includes a battery support structure 6. The battery support structure 6 is provided with a conductive element 61 and a battery support frame 62. The conductive element 61 is connected to the battery support frame 62. The battery support frame 62 is connected to the PCB voltage reduction protection board 1, and the conductive element 61 is connected to the negative terminal of the voltage reduction protection board. The steel shell 3 is connected to the conductive element 61 to conduct the circuit. In Embodiment 6 of this utility model, the battery support structure 6 is provided with a snap-fit ​​fastening end, and the battery support structure 6 is fastened to the PCB voltage reduction protection board 1 through the snap-fit ​​fastening end to improve the connection. For stability, the Type-C interface 12 is protected within the battery support structure 6 to prevent damage to the Type-C interface 12 during automated production. The conductive component 61 is provided with a first conductive connection part 611 and a second conductive connection part 612. The first conductive connection part 611 and the second conductive connection part 612 adopt an integral molding structure design to improve the stability of the connection. The PCB step-down protection board 1 is provided with a negative electrode step-down board connection position 11. The second conductive connection part 612 is connected to the negative electrode step-down board connection position 11. The first conductive connection part 611 is connected to the steel shell 3 to connect to the negative electrode conduction circuit of the battery cell.

[0057] In Embodiment 6 of this utility model, the first connection structure is provided with a first connecting tab 42 and a second insulating pad 43. One end of the first connecting tab 42 is connected to the positive terminal of the step-down protection board, and the other end is connected to the positive terminal of the battery cell. This facilitates the connection of the two ends of the first connecting tab 42 to the PCB step-down protection board 1 and the rechargeable battery cell 2 by welding, thereby ensuring the stability of the connection between the PCB step-down protection board 1 and the rechargeable battery cell 2, and thus ensuring the stability of the power supply of the constant voltage rechargeable battery. At the same time, it simplifies the structural composition of the constant voltage rechargeable battery, facilitates automated assembly, and improves production efficiency. In addition, by providing the second insulating pad 43, Embodiment 6 of this utility model can avoid an excessively large contact area between the first connecting tab 42 and the PCB step-down protection board 1 after assembly, thereby ensuring the safety of the constant voltage rechargeable battery.

[0058] In embodiment 6 of this utility model, the current collection structure is one of the following: the current collection contact end 51 adopts an elastic structure design; the current collection structure body 52 is provided with a second electrode 521 and multiple current collection holes 522; or the current collection structure body 52 is provided with a second electrode 521 and multiple current collection holes 522, combined with conductive foamed nickel 54. The elastic structure design is preferred to ensure that the stability of the constant voltage rechargeable battery is enhanced while simplifying the overall structure.

[0059] The constant-voltage rechargeable battery provided in embodiments 1-6 of this utility model, which is easy to assemble, further includes a battery insulating film, which covers the outer surface of the steel shell 3; the steel shell 3 is provided with a steel shell roller groove 31 for limiting the PCB voltage reduction protection board 1 and the first connecting structure, and the steel shell roller groove 31 is provided with a roller groove connecting end 311, which is connected to the conductive circuit of the PCB voltage reduction protection board 1; the steel shell 3 is a one-piece molded structure, and the inner part of the constant-voltage rechargeable battery is provided with a steel shell opening at one end of the steel shell 3. After the components are automatically assembled into the steel shell 3 through the opening in the steel shell, the opening in the steel shell is rolled using a rolling process to form the steel shell roller groove 31 and the roller groove connection end 311 for directly or indirectly connecting the PCB step-down protection board 1. This ensures that, while maintaining the internal circuitry of the constant voltage lithium battery, the PCB step-down protection board 1 and the first connection structure are securely fastened in the steel shell roller groove 31, or the PCB step-down protection board 1 is directly fastened in the steel shell roller groove 31, thereby improving the stability of the constant voltage lithium battery during use.

[0060] In embodiments 1-6 of this utility model, the roller groove connection end 311 is directly connected to the negative terminal of the voltage reduction protection plate, which is a direct connection; the roller groove connection end 311 is indirectly connected to the negative terminal of the voltage reduction protection plate through the conductive element 61.

[0061] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A constant-voltage rechargeable battery that is easy to assemble, comprising a PCB step-down protection board (1), a rechargeable battery cell (2), and a steel casing (3), characterized in that, A first connection structure is provided between the PCB step-down protection board (1) and the rechargeable battery cell (2), and a current collection structure for conducting electricity is provided between the rechargeable battery cell (2) and the steel shell (3); The current collection structure is provided with a current collection abutment end (51) and a current collection structure body (52), and the current collection abutment end (51) is connected to the current collection structure body (52). The rechargeable battery cell (2) is provided with a positive electrode and a negative electrode. The positive electrode is connected to the positive terminal of the step-down protection board of the PCB step-down protection board (1) through the first connection structure. The negative electrode is connected to the current collector body (52) relative to the current collector abutment (51). The current collector abutment (51) is connected to the steel shell (3) and is connected to the negative terminal of the step-down protection board through the steel shell (3) to conduct the circuit of the constant voltage rechargeable battery.

2. The constant-voltage rechargeable battery according to claim 1, characterized in that, The current collection abutment end (51) is designed with an elastic structure, and the current collection abutment end (51) is provided with an elastic connection part (511) and an elastic abutment plane part (512). The elastic connection part (511) is connected to the current collection structure body (52), and the elastic abutment plane part (512) is connected to the elastic connection part (511) and abuts against the steel shell (3) to conduct the circuit.

3. The easy-to-assemble constant-voltage rechargeable battery according to claim 2, characterized in that, The first connection structure is a first connection tab (42), one end of which is connected to the positive terminal of the step-down protection board, and the other end is connected to the positive terminal of the battery cell.

4. The constant-voltage rechargeable battery according to claim 1, characterized in that, It also includes conductive foamed nickel (54), the current collector body (52) is provided with a second tab (521), the second tab (521) is connected to the current collector body (52) and connected to the negative terminal of the battery cell; the current collector body (52) is connected to the conductive foamed nickel (54) through the current collector abutment end (51); the conductive foamed nickel (54) is connected to the steel shell (3) and connected to the negative terminal of the step-down protection board to conduct the circuit through the steel shell (3).

5. A constant-voltage rechargeable battery that is easy to assemble according to claim 4, characterized in that, The current collection structure body (52) is also provided with a plurality of current collection holes (522), and a plurality of current collection abutment ends (51) are connected to the conductive foamed nickel (54) on one side of the current collection holes (522).

6. The constant-voltage rechargeable battery according to claim 1, characterized in that, The PCB step-down protection board (1) is provided with a Type-C interface (12) for fast charging. The Type-C interface (12) is connected to the PCB step-down protection board (1), and the rechargeable battery cell (2) is charged through the Type-C interface (12).

7. A constant-voltage rechargeable battery that is easy to assemble according to claim 6, characterized in that, It also includes a battery support structure (6), which is provided with a conductive element (61) and a battery support frame (62). The conductive element (61) is connected to the battery support frame (62). The battery support frame (62) is connected to the PCB step-down protection board (1). The conductive element (61) is connected to the negative terminal of the step-down protection board. The steel shell (3) is connected to the conductive element (61) to conduct the circuit.

8. A constant-voltage rechargeable battery that is easy to assemble according to claim 3, characterized in that, The first connection structure is further provided with a first insulating washer (41) for limiting the PCB step-down protection board (1), and the first insulating washer (41) is provided with a first sealing snap-fit ​​groove (411); the PCB step-down protection board (1) is installed in the first sealing snap-fit ​​groove (411) and connected to the positive electrode of the battery cell.

9. A constant-voltage rechargeable battery that is easy to assemble according to any one of claims 2-8, characterized in that, It also includes a battery insulating film, which covers the outer surface of the steel shell (3); the steel shell (3) is provided with a steel shell roller groove (31) for limiting the PCB step-down protection board (1) and the first connection structure, the steel shell roller groove (31) is provided with a roller groove connection end (311), and the roller groove connection end (311) is directly or indirectly connected to the conductive circuit of the PCB step-down protection board (1).

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