CN214797515U

CN214797515U - Cylindrical battery with built-in charge-discharge protection circuit

Info

Publication number: CN214797515U
Application number: CN202120851184.8U
Authority: CN
Inventors: 秦燕; 秦树勇; 黄治桦
Original assignee: Shenzhen Anwei Technology Co ltd
Current assignee: Guizhou Anwei Chuanneng Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-19
Anticipated expiration: 2031-04-23

Abstract

The utility model belongs to the technical field of rechargeable dry batteries, in particular to a cylindrical battery with a built-in charging and discharging protection circuit, which comprises a metal shell with an opening at one end, a core winding core arranged in the metal shell, a positive electrode cap, a rubber plug support arranged in the opening end of the metal shell, and a protection circuit board arranged in the outer surface of the rubber plug support and positioned in the opening end of the metal shell; two cell pole columns arranged at the positive end of the cell roll core penetrate through the rubber plug support and then are electrically connected with the protection circuit board; the positive electrode cap is arranged on the outer surface of the protection circuit board. Adopt above-mentioned structure, accessible metal casing once only wraps up core, protection circuit board and plug support with electric core and encapsulates, and this encapsulation process accessible automation equipment accomplishes, is favorable to reducing the manufacturing cost of product by a wide margin to promote the uniformity of product quality.

Description

Cylindrical battery with built-in charge-discharge protection circuit

Technical Field

The utility model relates to a dry battery technical field specifically indicates a cylindrical dry battery that sets up charge-discharge protection circuit in it that can charge and discharge.

Background

Most of the conventional cylindrical dry batteries are disposable batteries which are discarded after being used up, so that environmental pollution and resource waste are easily caused. Therefore, in order to avoid environmental pollution as much as possible, more and more disposable dry batteries are replaced by rechargeable dry batteries, the rechargeable dry batteries adopt lithium ion battery cores at present, the battery cores are packaged by metal shells, and then the circuit board and the battery cores are packaged together by the metal shells, namely the rechargeable dry batteries can be manufactured by at least two times of packaging, the process is complex, and the processing cost is high; and circuit board and electric core direct contact, the unable timely release of pressure that produces when electric core swell, inflation leads to the dry battery explosion to produce the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In order to overcome the disadvantages of the prior art, the utility model aims to provide a cylindrical battery with a built-in charging and discharging protection circuit, which is made by the core of an electric core, a protection circuit board and a metal shell through one-time encapsulation, and has the advantages of less procedures and simple process.

In order to achieve the above object, the utility model adopts the following technical scheme: a cylindrical battery with a built-in charge-discharge protection circuit comprises a metal shell, a cell core and a positive electrode cap, wherein one end of the metal shell is provided with an opening; two cell pole columns arranged at the positive end of the cell roll core penetrate through the rubber plug support and then are electrically connected with the protection circuit board; the positive electrode cap is arranged on the outer surface of the protection circuit board.

Preferably, the rubber plug support is cylindrical, and the outer wall of the rubber plug support is tightly attached to the inner wall of the metal shell; a longitudinal pressure relief hole for releasing pressure is arranged in the rubber plug support.

Preferably, two metal clamps are arranged on the inner surface of the protection circuit board, and two battery cell poles penetrate through the rubber plug support longitudinally and then are respectively inserted into the two metal clamps and are respectively contacted with the metal clamps.

Preferably, a battery formation hole is formed in the protection circuit board, an annular negative contact piece is arranged on the outer surface of the protection circuit board, and the battery formation hole is positioned in a gap between two end parts of the annular negative contact piece; the protective circuit board is exposed from the open end of the metal shell.

Preferably, the outer wall of the opening end of the metal shell is provided with a radial groove, a radial protrusion is formed at a position corresponding to the radial groove on the inner wall of the metal shell, and an annular groove for accommodating the radial protrusion is formed on the rubber plug support.

The beneficial technical effects are as follows: the protective circuit board is embedded in the outer surface of the rubber plug support, the contact surface between the edge of the protective circuit board and the rubber plug support is sealed by sealant, and the components on the protective circuit board are hidden in the rubber plug support to prevent the protective circuit board from being damaged due to the fact that liquid enters the battery; roll up the core with electric core and put in metal casing to adopt plug support shutoff metal casing's open end, thereby, once only roll up core, protection circuit board and plug support with electric core and encapsulate through metal casing, this encapsulation process accessible automation equipment is accomplished, is favorable to reducing the manufacturing cost of product by a wide margin, and promotes the uniformity of product quality.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a perspective view of the protection circuit board according to the embodiment of the present invention;

fig. 4 is the utility model discloses electricity core and protection circuit board's connection diagram is rolled up to electric core.

Detailed Description

In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-2, the embodiment of the utility model provides a cylindrical battery of built-in charge-discharge protection circuit, include that one end is equipped with open-ended metal casing 1, locates electric core book core 2 in the metal casing 1, positive polar cap 3, electric core book core 2 is the product on the market.

The rubber plug device also comprises a rubber plug support 4 arranged in the opening end of the metal shell 1 and a protective circuit board 5 arranged in the outer surface of the rubber plug support and positioned in the opening end of the metal shell; two cell poles 6 arranged at the positive end of the cell roll core 2 penetrate through the rubber plug support 4 and then are electrically connected with the protection circuit board 5; the positive electrode cap 3 is arranged on the outer surface of the protection circuit board 5.

In order to install the protection circuit board 5, a sinking seat is arranged in the outer surface of the rubber plug support 4, and the shape of the sinking seat is matched with that of the protection circuit board 5.

In this embodiment, the rubber plug support 4 is cylindrical and made of a deformable flexible material, and the outer wall of the rubber plug support is tightly attached to the inner wall of the metal shell 1; be equipped with the vertical pressure release hole 401 that is used for release pressure in plug support 4, roll up 2 direct contact because of plug support and electric core, roll up core 2 when interior pressure is produced because of the bulge that generates heat to electric core, this pressure passes through the release of pressure release hole 401, consequently, the pressure release hole both can be perforation and also can be the blind hole, and when the pressure release hole adopted the blind hole, the bottom plate in pressure release hole was thinner, and electric core rolls up core 2 promptly and can break through this bottom plate because of the pressure that the bulge produced generates heat, in time goes out pressure release, prevents the dry battery explosion.

As shown in fig. 1 and 3, a battery hole 501 is formed in the protection circuit board 5, an annular negative contact 8 is arranged on the outer surface of the protection circuit board, and the battery hole 501 is located in a gap between two ends of the annular negative contact 8; the protection circuit board 5 is exposed from the open end of the metal case 1. The battery formation hole 501 can be used for a formation process before the rechargeable battery leaves a factory, and can also be matched with the pressure relief hole 401, pressure generated when the battery core is heated and bulges is timely discharged out of the metal shell 1, explosion of the dry battery is prevented, and potential safety hazards are avoided.

As shown in fig. 3-4, in order to realize the electrical connection between the core 2 and the protection circuit board 5, two metal clips 7 are disposed on the inner surface of the protection circuit board 5, two core posts 6 are respectively inserted into the two metal clips 7 after longitudinally passing through the rubber plug support 4 and respectively contact with the metal clips 7, and the core posts 6 contact with the metal clips 7 to realize the electrical connection between the core 2 and the protection circuit board 5.

As shown in fig. 1-2, a radial groove 101 is formed on the outer wall of the opening end of the metal shell 1, a radial protrusion is formed on the inner wall of the metal shell at a position corresponding to the radial groove, and an annular groove 402 for accommodating the radial protrusion is formed on the rubber plug support 4.

The cell winding core 2 of the embodiment of the utility model adopts the existing polymer; during assembly, firstly, a prepared battery core 2 is placed into the metal shell 1 with a negative plate facing downwards, the negative plate is spot-welded on the metal shell 1, then groove rolling processing is carried out at a set position on the outer wall of the opening end of the metal shell 1 to obtain a radial groove 101, then the prepared rubber plug support 4 is arranged in the opening end of the metal shell 1, a radial bulge on the inner wall of the metal shell 1 extrudes the outer wall of the rubber plug support 4 to form an annular groove 402, the protective circuit board 5 is integrally arranged in the rubber plug support 4, and the battery post 6 is inserted into the metal clamp 7 to realize electric connection; finally, the upper edge of the metal shell 1 is pressed inwards through a die and a pressing device, so that the negative electrode on the top surface of the protection circuit board is connected with the metal shell 1, and the metal shell 1 becomes the negative electrode of the battery; the top surface of the protection circuit board 5 is provided with a positive electrode cap 3 as the positive electrode of the battery (a positive input terminal of a power supply during charging); the top surface of the protection circuit board 5 is provided with a negative contact 8 which is a negative terminal of a power supply during charging. The top surface of the protection circuit board 5 is provided with a battery formation hole 501, and for formation, the power supply positive electrode (which is connected to the positive electrode of the battery core winding core 2 through the protection circuit board 5 circuit) is used, and the battery formation hole 501 is also used as a pressure release channel when the battery is out of thermal control.

In the above description, it should be noted that the terms "mounted," "connected," and the like are used in a broad sense, and for example, they may be fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components.

It is to be understood that the above-described embodiments are only some of the embodiments of the present invention, and not all embodiments, and that the appended drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the invention. The present invention may be embodied in many different forms and, on the contrary, these embodiments are provided so that this disclosure will be thorough and complete. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims

1. A cylindrical battery with a built-in charge-discharge protection circuit comprises a metal shell, a core winding core and a positive electrode cap, wherein one end of the metal shell is provided with an opening; two cell pole columns arranged at the positive end of the cell roll core penetrate through the rubber plug support and then are electrically connected with the protection circuit board; the positive electrode cap is arranged on the outer surface of the protection circuit board.

2. The cylindrical battery with a built-in charge-discharge protection circuit as claimed in claim 1, wherein said rubber plug support is cylindrical, and its outer wall is tightly attached to the inner wall of the metal casing; a longitudinal pressure relief hole for releasing pressure is arranged in the rubber plug support.

3. The cylindrical battery with a built-in charge-discharge protection circuit of claim 2, wherein the protection circuit board has two metal clips on its inner surface, and two cell poles are inserted into the two metal clips after passing through the plug support in the longitudinal direction and are in contact with the metal clips.

4. The cylindrical battery with built-in charge-discharge protection circuit as claimed in claim 3, wherein a hole for formation of battery is formed in the protection circuit board, and a ring-shaped negative contact piece is provided on the outer surface of the protection circuit board, and the hole for formation of battery is located in the gap between the two ends of the ring-shaped negative contact piece; the protective circuit board is exposed from the open end of the metal shell.

5. The cylindrical battery with a built-in charge-discharge protection circuit as claimed in claim 4, wherein the outer wall of the opening end of the metal casing is provided with a radial groove, a radial protrusion is formed on the inner wall of the metal casing at a position corresponding to the radial groove, and the rubber plug holder is provided with an annular groove for accommodating the radial protrusion.