阅读说明：本技术 一种具有充电保护功能的锂电池 (Lithium battery with charging protection function ) 是由 黄龙 何兴汇 徐志华 彭涛 梁东 刘红平 于 2021-08-21 设计创作，主要内容包括：本申请涉及一种具有充电保护功能的锂电池,其包括电池本体、保护组件和导热组件,所述保护组件和导热组件均安装于所述电池本体内,所述导热组件分别连接所述电池本体和保护组件,所述导热组件将所述保护组件产生的热量传递到所述电池本体上。本申请具有提高保护组件的散热速度,保持保护组件的工作稳定性,从而保证了锂电池的品质的效果。(The application relates to a lithium battery with charging protection function, it includes battery body, protection subassembly and heat-conducting component all install in this is internal to the battery, heat-conducting component connects respectively battery body and protection subassembly, heat-conducting component will the heat transfer that the protection subassembly produced arrives on the battery body. This application has the radiating rate who improves the protection subassembly, keeps the job stabilization nature of protection subassembly to the effect of the quality of lithium cell has been guaranteed.)

1. The utility model provides a lithium cell with charge protection function which characterized in that: including battery body (1), protection subassembly (3) and heat-conducting component (2) all install in battery body (1), heat-conducting component (2) are connected respectively battery body (1) and protection subassembly (3), heat-conducting component (2) will the heat transfer that protection subassembly (3) produced arrives on battery body (1).

2. A lithium battery with a charge protection function according to claim 1, characterized in that: the battery comprises a battery body (1) and is characterized in that the battery body (1) comprises a battery cell (11), a support (12), a protective film (14), a cap (13) and a packaging film (15), the support (12) is fixed at the positive end of the battery cell (11), a protective assembly (3) is installed on the support (12), the protective film (14) is installed at one side, away from the battery cell (11), of the protective assembly (3), the cap (13) is fixed at the positive end of the battery cell (11), the cap (13) is sleeved outside the support (12) and the protective assembly (3), the packaging film (15) is wrapped outside the battery cell (11) and the cap (13), and one end of a heat conducting assembly (2) is fixed on a shell of the battery cell (11).

3. A lithium battery with a charge protection function according to claim 2, characterized in that: one side of support (12) is equipped with conveniently with heat-conducting component (2) welds notch (121) on protection component (3).

4. A lithium battery with a charge protection function according to claim 1, characterized in that: the heat conduction assembly (2) comprises a heat conduction belt (21), one end of the heat conduction belt (21) is fixedly connected with the protection assembly (3), and the other end of the heat conduction belt (21) is fixedly connected with the battery body (1).

5. A lithium battery with charge protection according to claim 4, characterized in that: one end of the heat conduction belt (21) connected with the battery body (1) is provided with a heat dissipation part (211), and the heat dissipation part (211) is fixed on the battery body (1).

6. A lithium battery with charge protection according to claim 4, characterized in that: the heat conduction belt (21) is a nickel belt.

7. A lithium battery with a charge protection function according to claim 1, characterized in that: the protection component (3) comprises a protection chip (32) and a printed circuit board (31), the printed circuit board (31) is installed on the battery body (1), the protection chip (32) is installed on the printed circuit board (31), and the protection chip (32) is connected with the heat conduction component (2).

8. A lithium battery with a charge protection function according to claim 7, characterized in that: the printed circuit board (31) adopts a bare copper design, a tin layer is plated on the printed circuit board (31), and the tin layer is abutted to the battery body (1).

Technical Field

The application relates to the field of lithium batteries, in particular to a lithium battery with a charging protection function.

Background

At present, the rechargeable lithium battery mainly comprises an electric core and a protection system, wherein the electric core is equivalent to the heart of the lithium battery, the protection system is equivalent to the brain of the lithium battery, the protection system is mainly used for overcharge, overdischarge, over-temperature and over-current of the lithium battery and short-circuit protection, and the protection system can stabilize the working temperature of the lithium battery.

The core of the protection system is a protection assembly composed of electronic components, the protection assembly can consume some electric energy and generate heat in the operation process, so that the temperature height of the protection assembly is high, the efficiency of the protection system is reduced or even loses efficacy after the temperature of the protection assembly is increased, and the overcharge, overdischarge, over-temperature and over-current of the lithium battery are reduced, and the short-circuit protection effect is achieved.

In view of the above-mentioned related art, the inventors consider that there is a drawback that the heat dissipation speed of the protection component is slow.

Disclosure of Invention

In order to solve the problem that the heat dissipation speed of the protection assembly is low, the application provides a lithium battery with a charging protection function.

The application provides a lithium cell with charge protection function adopts following technical scheme:

the utility model provides a lithium cell with protection function of charging, includes battery body, protection subassembly and heat-conducting component all install in this is internal to the battery, heat-conducting component connects respectively battery body and protection subassembly, heat-conducting component will the heat transfer that the protection subassembly produced arrives on the battery body.

Through adopting above-mentioned technical scheme, the battery body is the charging of lithium cell, the main part of discharging, a be used for storing the electric energy, the protection subassembly is used for the overcharge of lithium cell, the excess is put, the excess temperature, overflow, short-circuit protection in addition, and the operating temperature of battery body is stabilized, the protection subassembly during operation produces the heat, lead to self temperature rising, heat conduction subassembly will protect on the heat transfer that the subassembly produced arrives the battery body, distribute away the heat fast through the battery body, the radiating rate of protection subassembly has been improved, the job stabilization nature of keeping the protection subassembly, thereby the quality of lithium cell has been guaranteed.

Preferably, the battery body comprises an electric core, a support, a protection film, a cap and a packaging film, the support is fixed at one positive end of the electric core, the protection assembly is mounted on the support, the protection film is mounted on one side, away from the electric core, of the protection assembly, the cap is fixed at one positive end of the electric core, the cap is sleeved outside the support and the protection assembly, the packaging film is wrapped outside the electric core and the cap, and one end of the heat conduction assembly is fixed at the shell of the electric core.

Through adopting above-mentioned technical scheme, electric core is the core of battery body, electric core is used for storing the electric energy, and realize charging and discharge function, overcharge appears in electric core, overdischarge, the excess temperature, when overflowing, can reduce the life of lithium cell, the support is used for installing the protection component, the support separates protection component and electric core, avoid protection component and electric core to produce mutual adverse effect, the steel bushing can provide the protection for protection component and support, avoid protection component and support to be destroyed by the foreign object, the protection film can carry out insulation protection to the protection component, the packaging film packs the lithium cell.

Preferably, one side of the bracket is provided with a notch which is convenient for welding the heat conduction assembly to the protection assembly.

Through adopting above-mentioned technical scheme, when welding heat-conducting component to the protection subassembly on, welding tool stretches into from the notch, welds heat-conducting component firmly.

Preferably, the heat conduction assembly comprises a heat conduction belt, one end of the heat conduction belt is fixedly connected with the protection assembly, and the other end of the heat conduction belt is fixedly connected with the battery body.

Through adopting above-mentioned technical scheme, the heat conduction area can transmit the high temperature of protection subassembly to the battery body on.

Preferably, one end of the heat conduction belt, which is connected with the battery body, is provided with a heat dissipation part, and the heat dissipation part is fixed on the battery body.

Through adopting above-mentioned technical scheme, the heat-dissipating part can increase the area of contact of heat-conducting component and battery body, increases thermal dispersion speed.

Preferably, the heat conduction band is a nickel band.

Through adopting above-mentioned technical scheme, the nickel strap has good ductility and weldability, and is easy to assemble, and the heat conductivity of nickel strap is good, can be quick with the high temperature transmission of protection component to the battery body on to the nickel strap is often used in lithium cell production, and material purchase is convenient.

Preferably, the protection component comprises a protection chip and a printed circuit board, the printed circuit board is mounted on the battery body, the protection chip is mounted on the printed circuit board, and the protection chip is connected with the heat conduction component.

By adopting the technical scheme, the printed circuit board is a supporting carrier for protecting the chip, and heat generated by the chip is transferred to the battery body through the heat conducting component.

Preferably, the printed circuit board is designed by adopting bare copper, and is plated with a tin layer which is abutted against the battery body.

By adopting the technical scheme, part of heat generated by the protection chip is transferred to the tin layer from the copper foil of the printed circuit board, and the tin layer is transferred to the battery body, so that the heat dissipation speed of the protection component is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the heat conducting assembly transmits heat generated by the protection assembly to the battery body, and the heat is rapidly dissipated out through the battery body, so that the heat dissipation speed of the protection assembly is improved, the working stability of the protection assembly is kept, and the quality of the lithium battery is guaranteed;

2. the heat dissipation part can enlarge the contact area between the heat conduction assembly and the battery body and improve the heat dissipation speed of the heat conduction assembly;

3. the tin layer can transfer a part of heat generated by the protection chip to the battery body, so that the heat dissipation speed of the protection assembly is improved.

Drawings

Fig. 1 is a schematic structural diagram of a lithium battery having a charge protection function according to an embodiment of the present application.

Fig. 2 is an enlarged view of a in fig. 1.

Description of reference numerals: 1. a battery body; 11. an electric core; 12. a support; 121. a notch; 13. capping; 14. a protective film; 15. packaging the film; 2. a heat conducting component; 21. a thermally conductive tape; 211. a heat dissipating section; 3. a protection component; 31. printing a circuit board; 32. and protecting the chip.

Detailed Description

The present application is described in further detail below with reference to figures 1 and 2.

The embodiment of the application discloses a lithium battery with a charging protection function. Referring to fig. 1 and 2, the lithium battery with the charging protection function includes a battery body 1, a protection component 3 and a heat conduction component 2, the protection component 3 and the heat conduction component 2 are both installed in the battery body 1, the heat conduction component 2 is respectively connected with the battery body 1 and the protection component 3, and the heat generated by the protection component 3 is transferred to the battery body 1 by the heat conduction component 2. The battery body 1 is a main body for charging and discharging of the lithium battery and is used for storing electric energy, and the protection assembly 3 is used for overcharge, overdischarge, over-temperature and over-current of the lithium battery, is also used for short-circuit protection and stabilizes the working temperature of the battery body 1. Protection component 3 during operation produces the heat, leads to self temperature to rise, and on heat conduction component 2 will protect the heat transfer that component 3 produced to battery body 1, distribute away the heat that is quick through battery body 1, improved protection component 3's radiating rate, keep protection component 3's job stabilization nature to the quality of lithium cell has been guaranteed.

The battery body 1 comprises a battery cell 11, a support 12, a protective film 14, a cap 13 and a packaging film 15, the battery cell 11 is cylindrical, one end of the battery cell 11 is a positive electrode, the other end of the battery cell 11 is a negative electrode, and a shell of the battery cell 11 is connected with the negative electrode of the battery cell 11. Support 12 is hollow cylinder, and the one end of support 12 is equipped with the heat conduction hole, and the other end of support 12 is equipped with the opening, and support 12 is equipped with the anodal one end of one end fixed connection electric core 11 of heat conduction hole, and protection component 3 fixed mounting is equipped with the clearance on the other end of support 12 between the anodal one end of protection component 3 and electric core 11, avoids protection component 3 direct and electric core 11 contact. Support 12 adopts insulating plastic to make, and the lateral wall of support 12 is equipped with notch 121 and positioning channel groove respectively, and notch 121 locates between protection component 3 and electric core 11, and during the installation protection component 3, will protect component 3 and the alignment notch 121 of the 2 junctions of heat-conducting component, conveniently weld heat-conducting component 2 on protecting component 3. The protective film 14 is a PET film, a positive electrode hole is arranged in the middle of the protective film 14, and the protective film 14 is installed on one side of the protective assembly 3 away from the battery cell 11 to perform insulation protection on the protective assembly 3. The cap 13 is made of steel, the cap 13 is installed at one end of the positive electrode of the battery cell 11, the cap 13 is fixed on the shell of the battery cell 11, and the cap 13 is sleeved on the support 12 and the protection assembly 3, so that the protection assembly 3 and the support 12 are prevented from being damaged by foreign objects. Packaging film 15 is the PVC membrane, and packaging film 15 wraps up outside electric core 11 and block 13, and the one end of heat conduction subassembly 2 is fixed in the shell of electric core 11.

The heat conduction assembly 2 comprises a heat conduction belt 21, the heat conduction belt 21 is a nickel belt, the heat conduction belt 21 is rectangular, and the length of the heat conduction belt 21 is cut before welding. Heat conduction band 21 passes the heat conduction hole and the opening of support 12 respectively, the one end of heat conduction band 21 is equipped with convenient welded connecting portion, the other end of heat conduction band 21 is equipped with heat dissipation portion 211, connecting portion fixed welding is in protection component 3, heat dissipation portion 211 is fixed in on electric core 11's the shell, heat conduction band 21 transmits the heat of protection component 3 to electric core 11's shell, heat dissipation portion 211 increases the area of contact of heat conduction component 2 and electric core 11's shell, increase thermal dispersion speed.

The protection assembly 3 comprises a protection chip 32 and a printed circuit board 31, the printed circuit board 31 is a supporting carrier of the protection chip 32, the printed circuit board 31 is installed on the support 12, the protection chip 32 is installed on one side of the printed circuit board 31 close to the battery cell 11, a negative electrode interface of the protection chip 32 is connected with one end of the heat conduction belt 21, the heat conduction belt 21 transfers heat generated by the protection chip 32 to a shell of the battery cell 11, and a positive electrode interface of the protection chip 32 is connected with a positive electrode of the battery cell 11 through a copper foil. Be equipped with the location cardboard on the protection chip 32, during the installation, the accurate installation of location cardboard gets into positioning groove, makes things convenient for protection component 3 to install in place. The printed circuit board 31 is designed by bare copper, a tin layer is plated on the printed circuit board 31 and is tightly attached to the cap 13, and a part of heat generated by the protection chip 32 is transferred to the shell of the battery cell 11 through the printed circuit board 31, the tin layer and the cap 13, so that the heat dissipation speed of the protection component 3 is increased. And a positive terminal is fixedly arranged on one side of the printed circuit board 31 far away from the electric core 11, electrically connected with the protection chip 32 and penetrates through the positive hole.

The embodiment of the application relates to an assembly process of a lithium battery with a charging protection function, which comprises the following steps: firstly cutting a heat conduction belt 21 with a specified length, simultaneously mounting a protection chip 32 on a printed circuit board 31 in advance to form a protection assembly 3, then spot-welding one end of the heat conduction belt 21 on a shell of the battery cell 11, then mounting the protection assembly 3 on the support 12, enabling one end of the heat conduction belt 21, far away from the battery cell 11, to penetrate through a heat conduction hole and an opening of the support 12, spot-welding the heat conduction belt 21 on the protection chip 32, shaping the battery cell 11, pasting a protection film 14, finally mounting a cover cap 13 on the battery cell 11, and sheathing a packaging film 15 for shaping. The assembly process is simple, the material cost is low, and the production efficiency is high.

The implementation principle of the lithium battery with the charging protection function in the embodiment of the application is as follows: the heat conduction belt 21 plays the effect of heat conduction, the shell of electric core 11 is transmitted to the heat that the heat conduction belt 21 will protect chip 32 to produce, give off to the outside through the shell of electric core 11, because the shell of electric core 11 is fast with outside heat exchange, and the heat exchange area is big, can distribute away the heat that the heat conduction belt 21 transmission was come is quick, the radiating rate of protection subassembly 3 has been improved, the job stabilization nature of protection subassembly 3 keeps, thereby the quality of lithium cell has been guaranteed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.