Rechargeable battery

Abstract

The utility model discloses a rechargeable battery which comprises a rechargeable battery cell, a USB Type-C female seat, a PCB charging board and a metal bottom shell barrel, the top and the bottom of the rechargeable battery cell are positive electrodes, and the negative electrodes are located on the side wall of the rechargeable battery cell; a positive electrode at the bottom of the battery cell is directly butted with a bonding pad on the back surface of the PCB charging board; the PCB charging board is integrated with a charging and discharging control chip, a Type-C wiring female seat and a negative electrode elastic piece / contact point. A through hole is formed in the bottom end of the metal bottom shell barrel; the USB Type-C female socket is sleeved in the cavity of the metal bottom shell barrel, and the through hole is located at the central or non-central position of the metal bottom shell barrel; and during assembly, the outer side wall of the rechargeable battery core is tightly attached to the inner side wall of the metal bottom shell barrel. The utility model can solve the problems that the assembly structure is complicated, the assembly process is complicated, and the capacity of the battery cell is reduced because the circuit board occupies the space of the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of rechargeable batteries, and particularly relates to a rechargeable battery. Background Art

[0002] Current batteries are all developing towards rechargeability, enabling the batteries to be used continuously to protect the environment and save energy. Rechargeable cylindrical batteries of No. 5 and No. 7 have emerged on the market. Their advantages are economy, environmental protection, and sufficient power, and they are suitable for electrical appliances that are used for a long time.

[0003] For existing rechargeable cylindrical batteries, a rechargeable battery cell, a Type-C interface, and an integrated circuit board are assembled in a cylindrical housing. The Type-C interface of the No. 5 rechargeable cylindrical battery is arranged at the top of the cylindrical housing or horizontally on the side close to the top. Due to the relatively small diameter of the No. 7 battery, the interface is usually arranged on the side wall of the cylinder. For example, for a rechargeable battery with a Type-C interface disclosed in the prior art with a publication number of CN209786106U, when a No. 7 battery is manufactured using this solution, the following problems exist: (1) Since the Type-C interface is arranged on the side wall, the volume of the USB Type-C female socket itself and the integrated circuit board occupy a relatively large space in the battery inner cavity, resulting in a relatively reduced space for placing the battery cell, thereby restricting the capacity of the rechargeable battery; (2) When inserting the interface for charging, since the extending direction of the Type-C interface is not along the radial direction of the cylinder, it is easy to misalign during the insertion process, and repeated plugging and unplugging operations will cause damage to the interface or wiring. Taking a rechargeable battery disclosed in the prior art with a publication number of CN219917501U as an example, its Type-C interface is arranged horizontally. If this solution is implemented for a No. 7 battery, the standard size of a Type-C female head is 8.3mm * 2.5mm * 5.7mm, and the standard size of a No. 7 battery is a height of 44.0mm and a diameter of 10.0mm. When the interface body with a depth of 5.7mm is arranged horizontally in the inner cavity of the No. 7 battery and needs to be connected to the integrated circuit board, there are problems such as complex assembly structure, complex assembly process, and the circuit board occupying the space of the battery cell, resulting in a reduction in the capacity of the battery cell. Therefore, it is necessary to improve the existing rechargeable cylindrical batteries, especially for the improvement of small-sized No. 7 batteries. Summary of the Utility Model

[0004] 1. Technical problems to be solved:

[0005] In view of the above technical problems, the utility model provides a rechargeable battery to solve the problems in the prior art.

[0006] 2. Technical solutions:

[0007] A rechargeable battery, characterized in that: it includes a cylindrical rechargeable battery cell, a USB Type-C female socket, a PCB charging board, and a cylindrical metal bottom shell barrel; the top and bottom of the rechargeable battery cell are both positive electrodes, and its negative electrode is located at the middle position of the rechargeable battery cell; the positive electrode at the bottom of the rechargeable battery cell is directly connected to the pad on the back of the PCB charging board; the PCB charging board integrates a charge and discharge control chip, a Type-C wiring female socket, and a negative electrode elastic sheet / contact point; the top of the metal bottom shell barrel is open and a through hole for passing a USB Type-C male head is provided at the bottom end; the PCB charging board can be fixedly sleeved in the inner cavity of the metal bottom shell barrel, its front is fixedly connected to the USB Type-C female socket, and pads are provided on the back; the USB Type-C female socket is sleeved in the cavity between the metal bottom shell barrel and the PCB charging board; the through hole for passing the Type-C male head is located at the center or non-center position of the metal bottom shell barrel; the outer diameter of the rechargeable battery cell is the same as or close to the inner diameter of the metal bottom shell barrel, and the outer side wall of the rechargeable battery cell and the inner side wall of the metal bottom shell barrel can be closely attached during assembly; during charging, the PCB charging board will pass the current input through the Type-C male head through the charge and discharge control chip, the pad, the positive electrode of the rechargeable battery cell, the negative electrode on the side wall of the rechargeable battery cell, the negative electrode elastic sheet / contact point, and the negative electrode of the Type-C male head in sequence to charge the rechargeable battery cell; when the battery is discharging during normal operation, the positive electrode terminal at the top of the rechargeable battery cell serves as the positive electrode of the battery, and the metal negative electrode on the outer wall of the rechargeable battery cell passes through the closely attached metal bottom shell barrel, making the bottom of the metal bottom shell barrel the negative electrode of the battery.

[0008] Further, the height of the metal bottom shell barrel is less than that of the rechargeable battery cell, and the upper end of the metal bottom shell barrel is sleeved to the middle position of the rechargeable battery cell to achieve close fitting between the two.

[0009] Further, the height of the metal bottom shell barrel is greater than that of the rechargeable battery cell, and the metal bottom shell barrel is sleeved to the outer side wall of the rechargeable battery cell until the top of the rechargeable battery cell to achieve close fitting between the two.

[0010] Further, at the place where the metal bottom shell barrel and the rechargeable battery cell are closely attached, dimples are clamped out by a fixture during assembly to fix the relative positions of the two.

[0011] Further, a sealing gasket is provided between the PCB charging board and the metal bottom shell barrel; the sealing gasket is provided with a through hole for passing the USB Type-C female socket.

[0012] Further, a middle-hole insulating gasket is provided between the rechargeable battery cell and the PCB charging board; the middle hole of the middle-hole insulating gasket corresponds to the position of the pad, and the positive electrode at the bottom of the rechargeable battery cell is electrically connected to the PCB charging board circuit through this through hole.

[0013] 3. Beneficial effects:

[0014] The rechargeable battery provided by the present utility model designs the position of the internal charging interface of the battery and provides a specific assembly scheme, making the internal structure of the battery more reasonable and improving the capacity of the rechargeable battery as much as possible. Description of the Drawings

[0015] Figure 1 It is the external view of the rechargeable battery in the specific embodiment of the present utility model;

[0016] Figure 2 It is the schematic diagram of the rechargeable battery in the specific embodiment of the present utility model;

[0017] Figure 3 It is the schematic diagram of the charging integrated circuit board in the specific embodiment of the present utility model;

[0018] Figure 4 It is the front view of the charging integrated circuit board in the specific embodiment of the present utility model;

[0019] Figure 5 It is the schematic diagram of two assembly methods in the specific embodiment 2 of the present utility model;

[0020] Figure 6 It is the structural diagram of the rechargeable cell in the present utility model.

[0021] Reference Numerals: Rechargeable cell 1; USB Type-C female socket 2; PCB charging board 3, metal bottom shell barrel 4; positive terminal 5; charge and discharge control chip 7; through hole 9 of Type-C male head; indicator light 10; negative electrode elastic sheet / contact point 11; pad 12; sealing gasket 13; metal positive electrode 1-1; positive electrode lead 1-2; insulating ring 1-3; cell coil 1-4. Detailed Description of the Invention

[0022] The present utility model will be specifically described below in conjunction with specific embodiments. Specific Embodiment:

[0024] As shown in the attached Figures 1-5 figures, the battery adopted in this embodiment is a No. 7 battery; as shown in the attached Figure 1 figures, it is the external view of the No. 7 rechargeable battery; its Type-C interface for charging is arranged at the bottom of the battery. During charging, current is introduced through the Type-C interface; during discharging, the top of the battery serves as the positive terminal 5 of the battery and the bottom of the battery serves as the negative electrode to discharge. The outside of the whole battery is usually wrapped with a plastic shell.

[0025] As shown in the attached Figure 2As shown in the figure, it is a schematic diagram of the specific structure of the battery in this application; a rechargeable battery includes a rechargeable battery cell 1, a USB Type-C female socket 2, a PCB charging board 3, and a cylindrical metal bottom shell barrel 4; both the top and bottom of the rechargeable battery cell are positive electrodes, and its negative electrode is located in the middle of the rechargeable battery cell; the positive electrode at the bottom of the rechargeable battery cell is directly connected to the pad 12 on the back of the PCB charging board; the PCB charging board integrates a charge and discharge control chip 7, a wiring female socket of Type-C, and a negative electrode elastic sheet / contact point; the top end of the metal bottom shell barrel is open, and a through hole 9 for passing a USB Type-C male head is provided at the bottom end; the PCB charging board can be fixedly sleeved in the inner cavity of the metal bottom shell barrel, its front is fixedly connected to the USB Type-C female socket, and pads are provided on the back; the USB Type-C female socket is sleeved in the cavity between the metal bottom shell barrel and the PCB charging board; the through hole for passing the Type-C male head is located at the center or non-center position of the metal bottom shell barrel; the outer diameter of the rechargeable battery cell is the same as or close to the inner diameter of the metal bottom shell barrel, and the outer side wall of the rechargeable battery cell and the inner side wall of the metal bottom shell barrel can be closely attached during assembly; during charging, the PCB charging board will pass the current input through the Type-C male head through the charge and discharge control chip, the pad, the positive electrode of the rechargeable battery cell, the negative electrode on the side wall of the rechargeable battery cell, the negative electrode elastic sheet / contact point, and the negative electrode of the Type-C male head in sequence to realize the charging of the rechargeable battery cell; when the battery is discharging normally, the positive electrode terminal at the top of the rechargeable battery cell serves as the positive electrode of the battery, and the metal negative electrode on the outer wall of the rechargeable battery cell passes through the closely attached metal bottom shell barrel, making the bottom of the metal bottom shell barrel the negative electrode of the battery.

[0026] Regarding the connection problem between the PCB charging board and the metal bottom shell barrel, in this method, a negative electrode elastic sheet / contact point is used to realize the electrical connection between the two: if the size of the circular PCB charging board is just right to fit tightly with the metal barrel, no elastic sheet is needed and only the contact point can be used to realize the electrical connection between the two; if not, the negative electrode elastic sheet 11 is used to realize the connection between the two.

[0027] The structural diagram of the rechargeable battery cell involved in this solution is as shown in the appendix Figure 6 As shown, its shape is a cylinder; the rechargeable battery cell is composed of a metal shell, a cap, a positive electrode, a negative electrode, a separator, and an electrolyte. The side wall of the rechargeable battery shell in this solution is the negative electrode of the battery, and both ends are the positive electrodes of the battery. The battery shell is made of nickel-plated steel sheet. 1-1 in the figure represents the metal positive electrode; 1-2 represents the positive electrode lead; 1-3 represents the insulating ring; 1-4 represents the battery cell coil; the battery cell coil is composed of a positive electrode thin sheet, a separator, and a negative electrode thin sheet; the positive electrode leads located at the upper and lower ends respectively form positive electrodes at both ends of the battery cell.

[0028] The rechargeable battery cell is used to store electrical energy, and its charging and discharging can be controlled by the integrated charging and discharging control circuit on the charging integrated circuit board. The rated capacity of the rechargeable battery cell is an important indicator of the rechargeable battery, and its size has a direct decisive relationship with the size of the rechargeable battery cell. Therefore, when designing the rechargeable battery solution, it is necessary to ensure the size of the rechargeable battery cell as much as possible.

[0029] As shown in the Figure 3 attachment 4 and

[0030] figure Specific Embodiment 2:

[0032] This embodiment takes a No. 7 battery as an example to illustrate the assembly implementation process; as shown in the Figure 5 attachment Figure 5 This solution can be implemented through two assembly methods; the left two figures in

[0033] Figure 5 show the docking process in the case of a short bottom cylinder. In this case, the height of the metal bottom shell barrel is less than that of the rechargeable battery cell, and the upper end of the metal bottom shell barrel is sleeved to the middle position of the rechargeable battery cell to achieve a tight fit between the two. Since the metal bottom shell barrel is made of metal and has flexibility, a tight fit can be achieved during sleeving. Due to the tight fit between the two, the bottom of the battery, that is, the metal bottom shell barrel, can be used as the negative electrode when the battery discharges.

[0034] Both of the above methods have been proven to be able to fix the battery through production practice. To prevent the upper and lower parts of the battery from shifting relative to each other after the above two methods of close fitting, reference can be made to the method of fixing the metal shell of the lamp head by knocking it concave during the processing of LED bulb lamps. At the overlapping part of the rechargeable battery core and the metal bottom shell barrel that have been docked or clamped, a non-destructive knocking concave method can be used to form a convex-concave locking. It is also possible to fix the relative positions of the two by clamping out concave points during assembly.

[0035] To increase stability, a sealing gasket 13 can be added to the reverse side of the PCB charging board. Its shape is the same as that of a general metal screw gasket. The material is a ductile insulator (such as rubber, silicone, nylon), with an outer diameter the same as the inner diameter of the bottom barrel and a thickness slightly thicker than the protrusion of the positive electrode at the bottom of the double-headed battery core. Considering that there is an indicator light 10 on the surface of the PCB charging board, it is better that the material is transparent or semi-transparent.

[0036] At the same time, a middle-hole insulating gasket can also be arranged between the rechargeable battery core and the PCB charging board; the middle hole of the middle-hole insulating gasket corresponds to the position of the pad, and the positive electrode at the bottom of the rechargeable battery core is connected to the circuit of the PCB charging board through this through hole, where the middle-hole insulating gasket is not shown in the figure.

[0037] Although the present utility model has been disclosed above with preferred embodiments, they are not used to limit the present utility model. Any person skilled in this art can make various changes or modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the protection scope of the claims of this application.

Claims

1. A rechargeable battery, characterized in that: It includes a rechargeable battery cell in the shape of a cylinder, a USB Type-C female socket, a PCB charging board, and a metal bottom shell bucket in the shape of a cylinder; both the top and bottom of the rechargeable battery cell are positive electrodes, and its negative electrode is located in the middle position of the rechargeable battery cell; the positive electrode at the bottom of the rechargeable battery cell is directly connected to the pad on the back of the PCB charging board; the PCB charging board integrates a charge and discharge control chip, a wiring female socket of Type-C, and a negative electrode elastic piece / contact point; a through hole for passing a USB Type-C male head is provided at the bottom end of the top opening of the metal bottom shell bucket; the PCB charging board can be fixedly sleeved in the inner cavity of the metal bottom shell bucket, with the USB Type-C female socket fixedly connected to its front side and pads provided on the back side; the USB Type-C female socket is sleeved in the cavity between the metal bottom shell bucket and the PCB charging board; the through hole of the Type-C male head is located at the center or non-center position of the metal bottom shell bucket; the outer diameter of the rechargeable battery cell is the same as or close to the inner diameter of the metal bottom shell bucket, and a tight fit can be achieved between the outer side wall of the rechargeable battery cell and the inner side wall of the metal bottom shell bucket during assembly; during charging, the PCB charging board will pass the current input through the Type-C male head through the charge and discharge control chip, the pad, the positive electrode of the rechargeable battery cell, the negative electrode on the side wall of the rechargeable battery cell, the negative electrode elastic piece / contact point, and the negative electrode of the Type-C male head in sequence to charge the rechargeable battery cell; when the battery is discharging normally, the positive electrode terminal at the top of the rechargeable battery cell serves as the positive electrode of the battery, and the metal negative electrode on the outer wall of the rechargeable battery cell passes through the tightly fitted metal bottom shell bucket, making the bottom of the metal bottom shell bucket the negative electrode of the battery.

2. The rechargeable battery according to claim 1, wherein: The height of the metal bottom shell bucket is less than that of the rechargeable battery cell, and the upper end of the metal bottom shell bucket is sleeved to the middle position of the rechargeable battery cell to achieve a tight fit between the two.

3. A rechargeable battery according to claim 1, characterized in that: The height of the metal bottom shell bucket is greater than that of the rechargeable battery cell, and the metal bottom shell bucket is sleeved to the outer side wall of the rechargeable battery cell until the top of the rechargeable battery cell to achieve a tight fit between the two.

4. A rechargeable battery according to claim 1, characterized in that: At the tightly fitted part between the metal bottom shell bucket and the rechargeable battery cell, the relative positions of the two are fixed by clamping out concave points with a fixture during assembly.

5. A rechargeable battery according to claim 1, characterized in that: A gasket is provided between the PCB charging board and the metal bottom shell bucket; the gasket is provided with a through hole for passing the USB Type-C female socket.

6. A rechargeable battery according to claim 1, wherein: A middle-hole insulating gasket is provided between the rechargeable battery cell and the PCB charging board; the middle hole of the middle-hole insulating gasket corresponds to the position of the pad, and the positive electrode at the bottom of the rechargeable battery cell is connected to the circuit of the PCB charging board through this through hole.

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