Novel battery

By designing a new terminal structure and enhancing the elastic connection, the problem of loss of elasticity of the positive and negative shrapnel of the rechargeable battery is solved, and stable connection and reliability of the battery circuit are achieved.

CN223401783UActive Publication Date: 2025-09-30DONGGUAN KING POWER DIGITAL TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422492198.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-09-30
Estimated Expiration
2034-10-15

AI Technical Summary

Technical Problem

The positive and negative shrapnel of rechargeable batteries tend to lose their elasticity after long-term use, resulting in poor contact and causing battery failure.

Method used

A new terminal structure design is adopted, including the first terminal, the second terminal and the third terminal, which are in stable contact with the positive electrode cap, the battery cell and the negative electrode shell respectively. The arc-shaped bending design of the elastic part and the abutment part enhances the elastic force to ensure a stable connection.

Benefits of technology

This effectively avoids poor contact problems caused by insufficient elasticity and ensures the stability and reliability of the battery circuit function.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223401783U_ABST
    Figure CN223401783U_ABST
Patent Text Reader

Abstract

A novel battery comprises a positive electrode cap, an upper cover, an integrated circuit board, a battery cell and a negative electrode shell, the upper cover covers the negative electrode shell, the battery cell is installed on the negative electrode shell, a negative electrode of the battery cell is electrically connected with the negative electrode shell, and the positive electrode cap is electrically connected with a positive electrode conductive end of the integrated circuit board. The integrated circuit board is positioned above the battery cell, and the other positive electrode conductive end is electrically connected with the positive electrode of the battery cell; the integrated circuit board comprises a first terminal electrically connected with the positive electrode conductive end, a second terminal electrically connected with the other positive electrode conductive end and a third terminal electrically connected with the negative electrode conductive end of the integrated circuit board, the first terminal comprises a first welding part, a first elastic part and a first abutting part, the first abutting part is electrically connected with the positive electrode cap, and the third terminal is electrically connected with the negative electrode cap. The second terminal comprises a second welding part, a second elastic part and a second abutting part, the second abutting part is electrically connected with the positive electrode of the battery cell, the third terminal comprises a third welding part, a third elastic part and a third abutting part, and the third abutting part is electrically connected with the negative electrode shell.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a new type of battery. Background Art

[0002] At present, rechargeable batteries bring convenience to people with their rechargeable characteristics. They not only solve the pollution caused by disposable batteries to the environment, but also greatly reduce the cost of use.

[0003] In the prior art, a rechargeable battery generally includes an upper cover and an outer shell that are closed to each other, and a battery cell is installed in the enclosed space between the upper cover and the outer shell. A positive electrode cap is installed on the upper cover, and an integrated circuit board connected to the battery cell and the positive electrode cap is also included in the enclosed space between the upper cover and the outer shell. The integrated circuit board is provided with a positive electrode spring sheet that is conductive with the battery cell and a negative electrode spring sheet that is conductive with the outer shell. The positive electrode cap is conductively connected to the positive electrode spring sheet of the integrated circuit board through the integrated circuit board.

[0004] However, the positive and negative electrode springs are easily degraded after prolonged contact with the battery core and the outer shell, leading to poor contact and failure of the rechargeable battery. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of battery to solve the problem in the prior art that the positive and negative springs of rechargeable batteries easily lose their elasticity, resulting in battery failure.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A new type of battery includes a positive electrode cap, an upper cover, an integrated circuit board, a battery cell, and a negative electrode housing. The upper cover is covered on the negative electrode housing, and the upper cover and the negative electrode housing enclose an accommodation space. The battery cell is installed in the negative electrode housing and located within the accommodation space. The negative electrode of the battery cell is electrically connected to the negative electrode housing. The integrated circuit board is installed on the upper cover and located within the accommodation space. The positive electrode cap is installed on the upper cover and electrically connected to the positive electrode conductive end of the integrated circuit board. The integrated circuit board is located above the battery cell, and the other positive electrode conductive end of the integrated circuit board is electrically connected to the positive electrode of the battery cell. The integrated circuit board includes a first terminal electrically connected to the positive electrode conductive end, a second terminal electrically connected to the other positive electrode conductive end, and a third terminal electrically connected to the negative electrode conductive end of the integrated circuit board. The first terminal includes a first welding portion welded to the integrated circuit board, a first elastic portion connected to the first welding portion, and a first abutting portion provided at the end of the first elastic portion. The first abutting portion extends in the direction of the positive electrode cap and is electrically connected to the positive electrode cap. The second terminal includes a second welding portion welded to the integrated circuit board, a second elastic portion connected to the second welding portion, and a second abutting portion provided at the end of the second elastic portion. The second abutting portion extends in the direction of the battery cell and is electrically connected to the positive electrode of the battery cell. The third terminal includes a third welding portion welded to the integrated circuit board, a third elastic portion connected to the third welding portion, and a third abutting portion provided at the end of the third elastic portion. The third abutting portion extends in the direction of the side wall of the negative electrode housing and is electrically connected to the negative electrode housing.

[0008] Further, the new type of battery further includes an insulating sheet disposed between the integrated circuit board and the battery cell. The insulating sheet is provided with a through hole, and the second abutting portion of the second terminal passes through the through hole and abuts against the positive electrode of the battery cell.

[0009] Further, the upper cover is provided with an avoidance hole, and the first abutting portion of the first terminal passes through the avoidance hole and abuts against the positive electrode cap.

[0010] Further, the first elastic portion is arc-shaped and bent and extended from one end of the first welding portion, and the first abutting portion is arc-shaped and bent and extended obliquely upward from the end of the first elastic portion.

[0011] Further, the first welding portion is in a "U" shape. The first welding portion has a first connecting plate and first side plates connected to both sides of the first connecting plate. The first side plates extend vertically upward from the first connecting plate. One end of the first connecting plate is connected to the first elastic portion, and one of the first side plates is welded to the integrated circuit board; the upper end of at least one first side plate extends horizontally toward the other first side plate to form a first limiting plate.

[0012] Further, the second elastic portion is arc-shaped and bent and extended from one end of the second welding portion, and the second abutting portion is arc-shaped and bent and extended obliquely downward from the end of the second elastic portion.

[0013] Further, the second welding part is in a "U" shape. The second welding part has a second connecting plate and second side plates connected to both sides of the second connecting plate. The second side plates extend vertically downward from the second connecting plate. One end of the second connecting plate is connected to the second elastic part, and one of the second side plates is welded to the integrated circuit board; the lower end of at least one second side plate extends horizontally toward the other second side plate to form a second limiting plate.

[0014] Further, the third elastic part is formed by arcuately bending and extending from one end of the third welding part, and the third abutting part is formed by arcuately bending and extending from the end of the third elastic part toward the side wall of the negative electrode housing.

[0015] Further, the positive electrode cap extends downward with a mounting part that cooperates with the upper cover, and an anti - detachment elastic piece that inclines inward is provided on the mounting part.

[0016] Further, a USB interface is provided on the integrated circuit board, a plugging slot is provided on the upper cover corresponding to the USB interface, and a plugging hole is provided on the negative electrode housing corresponding to the USB interface.

[0017] The beneficial effects of a new type of battery of the present utility model: Through the cooperation of the first terminal, the upper cover, the positive electrode cap, and the integrated circuit board, the positive electrode conducting end of the integrated circuit board is conductively connected to the positive electrode cap; through the cooperation of the second terminal, the battery cell, and the integrated circuit board, the other positive electrode conducting end of the integrated circuit board is conductively connected to the positive electrode of the battery cell, thereby realizing the conductive connection between the positive electrode cap and the positive electrode of the battery cell; through the cooperation of the third terminal, the battery cell, and the integrated circuit board, the negative electrode conducting end of the integrated circuit board is conductively connected to the negative electrode of the battery cell. The first terminal, the second terminal, and the third terminal have sufficient elastic force to stably contact the positive electrode cap, the battery cell, and the negative electrode housing respectively, thereby avoiding the circuit function failure of the battery caused by poor contact due to insufficient elastic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of a new type of battery according to Embodiment 1 of the present utility model.

[0019] Figure 2 is Figure 1 the exploded perspective view of the new type of battery shown.

[0020] Figure 3 is Figure 1 the top view of the new type of battery shown.

[0021] Figure 4 is Figure 3 the sectional view of the new type of battery along the plane A - A shown.

[0022] Figure 5 is Figure 3 the sectional view of the new type of battery along the plane B - B shown.

[0023] Figure 6 for Figure 4 A perspective view of the first terminal is shown.

[0024] Figure 7 for Figure 6 A cross-sectional view of the first terminal is shown.

[0025] Figure 8 for Figure 4 A perspective view of the second terminal is shown.

[0026] Figure 9 for Figure 8 A cross-sectional view of the second terminal is shown.

[0027] Figure 10 for Figure 5 A perspective view of the third terminal is shown.

[0028] Figure 11 for Figure 2 A perspective view of the positive electrode cap is shown.

[0029] Figure 12 for Figure 2 A perspective view of the upper cover is shown.

[0030] Figure 13 This is a three-dimensional diagram of a new type of battery in Example 2 of the present utility model.

[0031] Figure 14 for Figure 13 A three-dimensional exploded view of the new battery shown.

[0032] Figure 15 for Figure 14 A perspective view of the upper cover is shown. DETAILED DESCRIPTION

[0033] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the present utility model indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limiting the present application.

[0035] Example 1:

[0036] See also Figures 1-6 , Figure 8 and Figure 10A new type of battery includes a positive electrode cap 10, an upper cover 20, an integrated circuit board 30, a battery cell 50 and a negative electrode shell 60, wherein the upper cover 20 is covered on the negative electrode shell 60, and the upper cover 20 and the negative electrode shell 60 enclose a storage space, the battery cell 50 is installed in the negative electrode shell 60 and is located in the storage space, the negative electrode of the battery cell 50 is electrically connected to the negative electrode shell 60, the integrated circuit board 30 is installed in the upper cover 20 and is located in the storage space, the positive electrode cap 10 is installed on the upper cover 20 and is electrically connected to the positive conductive end of the integrated circuit board 30, the integrated circuit board 30 is located above the battery cell 50, and the other positive conductive end of the integrated circuit board 30 is electrically connected to the positive electrode of the battery cell 50.

[0037] The integrated circuit board 30 includes a first terminal 31 electrically connected to the positive conductive end, a second terminal 32 electrically connected to the other positive conductive end, and a third terminal 33 electrically connected to the negative conductive end of the integrated circuit board 30 .

[0038] The first terminal 31 includes a first welding portion 311 welded to the integrated circuit board 30, a first elastic portion 312 connected to the first welding portion 311, and a first abutting portion 313 arranged at the end of the first elastic portion 312. The first welding portion 311 is electrically connected to the positive conductive end, and the first abutting portion 313 extends toward the positive electrode cap 10 and passes through the upper cover 20 to be electrically connected to the positive electrode cap 10.

[0039] The second terminal 32 includes a second welding portion 321 welded on the integrated circuit board 30, a second elastic portion 322 connected to the second welding portion 321, and a second abutting portion 323 arranged at the end of the second elastic portion 322. The second welding portion 321 is electrically connected to the positive conductive end, and the second abutting portion 323 extends toward the battery cell 50 and is electrically connected to the positive pole of the battery cell 50.

[0040] The third terminal 33 includes a third welding portion 331 welded to the integrated circuit board 30, a third elastic portion 332 connected to the third welding portion 331, and a third abutting portion 333 arranged at the end of the third elastic portion 332. The third welding portion 331 is electrically connected to the negative conductive end, and the third abutting portion 333 extends toward the side wall of the negative electrode shell 60 and is electrically connected to the negative electrode shell 60.

[0041] In this embodiment, the integrated circuit board 30 is vertically mounted on the upper cover 20, the first terminal 31 and the second terminal 32 are respectively located at the upper and lower ends of the integrated circuit board 30, and the third terminal 33 is located on the side of the integrated circuit board 30. The first abutting portion 313 of the first terminal 31 abuts the lower surface of the positive electrode cap 10, the second abutting portion 323 of the second terminal 32 abuts the positive electrode of the battery cell 50, and the third abutting portion 333 of the third terminal 33 abuts the inner side wall of the negative electrode shell 60.

[0042] As described above, the novel battery proposed by the present invention achieves a conductive connection between the positive conductive end of the integrated circuit board 30 and the positive cap 10 through the cooperation of the first terminal 31, the upper cover 20, the positive cap 10, and the integrated circuit board 30. The other positive conductive end of the integrated circuit board 30 and the positive electrode of the battery cell 50 are conductively connected through the cooperation of the second terminal 32, the battery cell 50, and the integrated circuit board 30, thereby achieving a conductive connection between the positive cap 10 and the positive electrode of the battery cell 50. The negative conductive end of the integrated circuit board 30 and the negative electrode of the battery cell 50 are conductively connected through the cooperation of the third terminal 33, the battery cell 50, and the integrated circuit board 30. The first terminal 31, the second terminal 32, and the third terminal 33 have sufficient elastic force to ensure stable contact with the positive cap 10, the battery cell 50, and the negative electrode housing 60, respectively, thereby preventing poor contact due to insufficient elastic force, which could result in circuit malfunction of the battery.

[0043] See also Figure 2 The novel battery further includes an insulating sheet 40 disposed between the integrated circuit board 30 and the battery cell 50. A through hole 41 is formed in the insulating sheet 40. The second abutting portion 323 of the second terminal 32 passes through the through hole 41 and abuts against the positive electrode of the battery cell 50. The insulating sheet 40 prevents other electronic components on the integrated circuit board 30 from contacting and conducting with the positive electrode of the battery cell 50, thereby affecting the circuit function of the novel battery.

[0044] See also Figure 12 The upper cover 20 is provided with a relief hole 21 , and the first contact portion 313 of the first terminal 31 passes through the relief hole 21 and contacts the positive electrode cap 10 .

[0045] See also Figure 6 and Figure 7 The first elastic portion 312 is formed by bending and extending in an arc shape from one end of the first welding portion 311 , and the first abutting portion 313 is formed by bending and extending in an arc shape obliquely upward from the end of the first elastic portion 312 .

[0046] Further, the first welding portion 311 is in a "U" shape. The first welding portion 311 has a first connecting plate 3111 and first side plates 3112 connected to both sides of the first connecting plate 3111. The first side plates 3112 extend vertically upward from the first connecting plate 3111. One end of the first connecting plate 3111 is connected to the first elastic portion 312, and one of the first side plates 3112 is welded to the integrated circuit board 30; the upper end of at least one of the first side plates 3112 extends horizontally toward the other first side plate 3112 to form a first limiting plate 3113. When the first abutting portion 313 of the first terminal 31 does not abut against the positive electrode cap 10, the first elastic portion 312 abuts against the first limiting plate 3113.

[0047] In this embodiment, the elastic force of the first elastic portion 312 can ensure the abutting force of the first terminal 31 against the positive electrode cap 10 upward, and the arc-shaped bending of the first abutting portion 313 can further enhance the abutting force of the first terminal 31 against the positive electrode cap 10, thereby effectively avoiding the circuit function failure caused by poor contact due to insufficient elastic force of the first terminal 31.

[0048] More specifically, a first convex rib 3131 protrudes in the direction of the positive electrode cap 10 on the first abutting portion 313, and the first convex rib 3131 can further increase the abutting force between the first terminal 31 and the positive electrode cap 10.

[0049] [[ID=ID=10]]Please refer to Figure 8 and Figure 9 , the second elastic portion 322 extends from one end of the second welding portion 321 by arc-shaped bending, and the second abutting portion 323 extends from the end of the second elastic portion 322 by inclined downward arc-shaped bending.

[0050] Further, the second welding portion 321 is in a "U" shape. The second welding portion 321 has a second connecting plate 3211 and second side plates 3212 connected to both sides of the second connecting plate 3211. The second side plates 3212 extend vertically downward from the second connecting plate 3211. One end of the second connecting plate 3211 is connected to the second elastic portion 322, and one of the second side plates 3212 is welded to the integrated circuit board 30; the lower end of at least one of the second side plates 3212 extends horizontally toward the other second side plate 3212 to form a second limiting plate 3213. When the second abutting portion 323 of the second terminal 32 does not abut against the battery cell 50, the second elastic portion 322 abuts against the second limiting plate 3213.

[0051] In this embodiment, the elastic force of the second elastic portion 322 can ensure that the second terminal 32 abuts the battery cell 50 downward, and the arc-shaped bending of the second abutting portion 323 can further enhance the abutting force of the second terminal 32 on the battery cell 50, thereby effectively avoiding poor contact caused by insufficient elastic force of the second terminal 32 and resulting in circuit failure.

[0052] More specifically, the second abutting portion 323 is provided with a second rib 3231 protruding toward the battery cell 50 . The second rib 3231 can further increase the abutting force between the second terminal 32 and the battery cell 50 .

[0053] See also Figure 10 The third elastic portion 332 is formed by bending and extending in an arc shape from one end of the third welding portion 331 , and the third abutting portion 333 is formed by bending and extending in an arc shape from the end of the third elastic portion 332 toward the side wall of the negative electrode case 60 .

[0054] In this embodiment, the elastic force of the third elastic portion 332 can ensure the abutment force of the third terminal 33 against the side wall of the negative electrode shell 60, and the arc-shaped bending of the third abutment portion 333 can further enhance the abutment force of the third terminal 33 against the negative electrode shell 60, thereby effectively avoiding poor contact caused by insufficient elastic force of the third terminal 33 and resulting in circuit failure.

[0055] See also Figure 12 The upper cover 20 defines a relief groove 22 for evading the third abutting portion 333 of the third terminal 33 . The third abutting portion 333 passes through the relief groove 22 and abuts against the inner wall of the negative electrode housing 60 .

[0056] See also Figure 11 and Figure 12 The positive electrode cap 10 extends downward to form a mounting portion 12 that cooperates with the upper cover 20 , and the mounting portion 12 is provided with an inwardly inclined anti-dropping spring piece 121 .

[0057] More specifically, the upper cover 20 is provided with a mounting hole 23 that cooperates with the mounting portion 12. When the positive electrode cap 10 is installed on the upper cover 20, the mounting portion 12 passes through the mounting hole 23. The mounting portion 12 cooperates with the mounting hole 23 to facilitate the positioning and assembly of the positive electrode cap 10 on the upper cover 20, thereby improving the assembly efficiency of the novel battery. In addition, the anti-detachment spring 121 abuts against the lower surface of the upper cover 20 to achieve the purpose of preventing detachment.

[0058] See also Figure 11 and Figure 12The positive electrode cap 10 is provided with a positive electrode protrusion 11, and the upper cover 20 is provided with a protrusion 24 corresponding to the positive electrode protrusion 11. The protrusion 24 is used to support the positive electrode protrusion 11 to prevent the positive electrode protrusion 11 from being deformed by force when installed in the battery slot, resulting in poor contact.

[0059] Example 2:

[0060] A novel battery having a structure similar to that of the novel battery in Example 1, except that:

[0061] See also Figure 13-15 The integrated circuit board 30 is provided with a USB port 34. The upper cover 20 has a plug-in slot 25 corresponding to the USB port 34. The negative electrode housing 60 has a plug-in hole 61 corresponding to the USB port 34. The USB port 34 is exposed on the side wall of the negative electrode housing 60 through the plug-in slot 25 and the plug-in hole 61. An external data cable can be plugged into the USB port 34 to achieve charging or data exchange functions.

[0062] The utility model provides a novel battery with the following beneficial effects: the first terminal 31, the second terminal 32, and the third terminal 33 have sufficient elastic force to stably contact the positive electrode cap 10, the battery cell 50, and the negative electrode shell 60, respectively, thereby avoiding poor contact due to insufficient elastic force, which may cause the circuit function of the battery to fail.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A new type of battery, characterized in that: It includes a positive electrode cap, an upper cover, an integrated circuit board, a battery cell and a negative electrode housing. The upper cover covers the negative electrode housing. The upper cover and the negative electrode housing enclose a receiving space. The battery cell is installed in the negative electrode housing and located within the receiving space. The negative electrode of the battery cell is electrically connected to the negative electrode housing. The integrated circuit board is installed on the upper cover and located within the receiving space. The positive electrode cap is installed on the upper cover and electrically connected to the positive electrode conductive end of the integrated circuit board. The integrated circuit board is located above the battery cell and the other positive electrode conductive end of the integrated circuit board is electrically connected to the positive electrode of the battery cell; The integrated circuit board includes a first terminal electrically connected to the positive electrode conductive end, a second terminal electrically connected to the other positive electrode conductive end, and a third terminal electrically connected to the negative electrode conductive end of the integrated circuit board. The first terminal includes a first welding portion welded on the integrated circuit board, a first elastic portion connected to the first welding portion, and a first abutting portion provided at the end of the first elastic portion. The first abutting portion extends in the direction of the positive electrode cap and is electrically connected to the positive electrode cap. The second terminal includes a second welding portion welded on the integrated circuit board, a second elastic portion connected to the second welding portion, and a second abutting portion provided at the end of the second elastic portion. The second abutting portion extends in the direction of the battery cell and is electrically connected to the positive electrode of the battery cell. The third terminal includes a third welding portion welded on the integrated circuit board, a third elastic portion connected to the third welding portion, and a third abutting portion provided at the end of the third elastic portion. The third abutting portion extends in the direction of the side wall of the negative electrode housing and is electrically connected to the negative electrode housing.

2. The novel battery according to claim 1, characterized in that: The novel battery further includes an insulating sheet disposed between the integrated circuit board and the battery cell. The insulating sheet is provided with a through hole. The second abutting portion of the second terminal passes through the through hole and abuts against the positive electrode of the battery cell.

3. The novel battery according to claim 1, characterized in that: The upper cover is provided with an avoidance hole. The first abutting portion of the first terminal passes through the avoidance hole and abuts against the positive electrode cap.

4. The novel battery according to claim 1, characterized in that: The first elastic portion is formed by arcuately bending and extending from one end of the first welding portion. The first abutting portion is formed by arcuately bending and extending obliquely upward from the end of the first elastic portion.

5. The novel battery according to claim 4, characterized in that: The first welding portion is in a "U" shape. The first welding portion has a first connecting plate and first side plates connected to both sides of the first connecting plate. The first side plates extend vertically upward from the first connecting plate. One end of the first connecting plate is connected to the first elastic portion. One of the first side plates is welded on the integrated circuit board; at least the upper end of one of the first side plates extends horizontally toward the other first side plate to form a first limiting plate.

6. The novel battery according to claim 1, characterized in that: The second elastic portion is formed by arcuately bending and extending from one end of the second welding portion. The second abutting portion is formed by arcuately bending and extending obliquely downward from the end of the second elastic portion.

7. The novel battery according to claim 6, characterized in that: The second welding part is in a "U" shape. The second welding part has a second connecting plate and second side plates connected to both sides of the second connecting plate. The second side plates extend downward vertically from the second connecting plate. One end of the second connecting plate is connected to the second elastic part. One of the second side plates is welded to the integrated circuit board; the lower end of at least one of the second side plates extends horizontally towards the other second side plate to form a second limiting plate.

8. The novel battery according to claim 1, characterized in that: The third elastic part is formed by arcuately bending and extending from one end of the third welding part. The third abutting part is formed by arcuately bending and extending from the end of the third elastic part towards the side wall of the negative electrode housing.

9. The novel battery according to claim 1, characterized in that: The positive electrode cap extends downward with a mounting part that mates with the upper cover. An anti - detachment elastic piece that inclines inward is provided on the mounting part.

10. The novel battery according to claim 1, characterized in that: A USB interface is provided on the integrated circuit board. The upper cover is provided with a plug - in slot corresponding to the USB interface, and the negative electrode housing is provided with a plug - in hole corresponding to the USB interface.