CN207677021U - A lithium-ion battery cell with high rate discharge - Google Patents

Abstract

The utility model discloses a lithium ion battery cell that discharges with large multiplying power, including external assembly and internal assembly the internal assembly includes second diaphragm, negative plate, first diaphragm, positive plate, heat conduction silica gel board, negative pole insulating piece and anodal insulating piece, the inside wall of plastic-aluminum packaging film is equipped with the heat conduction silica gel board, the heat conduction silica gel board with plastic-aluminum packaging film fixed connection, the inside wall of heat conduction silica gel board is equipped with the second diaphragm, the second diaphragm with heat conduction silica gel board fixed connection; through setting up external component and internal component, set up heat conduction silica gel plate at the inside wall of plastic-aluminum packaging film, heat conduction silica gel plate can shift the heat of the inside production of electric core to on one's body, with the heat transfer position for the radiating rate of electric core, and be equipped with the louvre on first diaphragm and second diaphragm, the positive negative electrode of lithium ion cell is flat wide a little than the electrode on the market, flat wide design can increase the multiplying power that discharges.

Description

A lithium-ion battery cell with high rate discharge

technical field

The utility model belongs to the technical field of lithium batteries, and in particular relates to a lithium-ion electric core for high-rate discharge.

Background technique

Lithium-ion batteries, that is, rechargeable batteries, remove the protective circuit board. It mainly relies on lithium ions to move between the positive and negative electrodes. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes. It is deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte. The negative electrode is in a lithium-rich state, and the opposite is true when discharging. Mobile phones and laptops use lithium-ion batteries.

The original lithium-ion battery has certain shortcomings. When the lithium-ion battery is combined with a protective circuit board to form a battery, it is impossible to obtain unlimited energy. Because the internal resistance of the lithium-ion battery is slightly larger, the discharge rate of the battery is lower. It is relatively large, so it takes a while to charge and discharge lithium batteries, and fast charging cannot be achieved, and the internal heat dissipation rate of the original lithium-ion batteries is slow, and the heat accumulated during high-rate charging and discharging cannot be transferred out, which will seriously affect the performance of lithium-ion batteries. safety and longevity.

Utility model content

The purpose of this utility model is to provide a lithium-ion battery cell with a large rate of discharge, to solve the shortcomings of the original lithium-ion battery cell proposed in the above-mentioned background technology, and add a protective circuit board to the lithium-ion battery cell to form a battery It is impossible to obtain unlimited energy when the lithium-ion battery is used. Because the internal resistance of the lithium-ion battery is slightly larger, the discharge rate of the battery is relatively large. Therefore, it takes a while to charge and discharge the lithium-ion battery, and fast charging cannot be achieved. The heat dissipation rate inside the core is slow, and the heat accumulated during high-rate charging and discharging cannot be transferred out, which will seriously affect the safety and life of lithium-ion batteries.

In order to achieve the above object, the utility model provides the following technical proposal: a lithium-ion cell with high rate discharge, including external components and internal components, the external components include negative terminals, positive terminals and aluminum-plastic packaging film, the aluminum The left side of the upper surface of the plastic packaging film is provided with the negative terminal, and the negative terminal is fixedly connected with the aluminum-plastic packaging film, and the positive terminal is provided on the right side of the upper surface of the aluminum-plastic packaging film. The terminal is fixedly connected to the aluminum-plastic packaging film, and the internal components include a second diaphragm, a negative plate, a first diaphragm, a positive plate, a heat-conducting silica gel plate, a negative insulating sheet and a positive insulating sheet, and the inner side of the aluminum-plastic packing film The wall is provided with the heat-conducting silica gel plate, the heat-conducting silica gel plate is fixedly connected with the aluminum-plastic packaging film, the inner wall of the heat-conducting silica gel plate is provided with the second diaphragm, and the second diaphragm is connected with the heat-conducting silica gel The plate is fixedly connected, the inside of the second diaphragm is provided with the negative plate, the negative plate is fixedly connected with the second diaphragm, the inner wall of the negative plate is provided with the first diaphragm, and the first The diaphragm is fixedly connected to the negative electrode plate, the positive electrode plate is provided inside the first diaphragm, the positive electrode plate is fixedly connected to the first diaphragm, and the negative electrode insulating sheet is provided on the outer wall of the negative electrode terminal , the negative insulating sheet is fixedly connected to the negative terminal, the outer wall of the positive terminal is provided with the positive insulating sheet, and the positive insulating sheet is fixedly connected to the positive terminal.

Preferably, the thermally conductive silica gel plate is located on the inner side wall of the aluminum-plastic packaging film, and is fixedly connected to the aluminum-plastic packaging film.

Preferably, the negative electrode insulating sheet is located below the outer wall of the negative electrode terminal, and is fixedly connected to the negative electrode insulating sheet.

Preferably, heat dissipation holes are provided inside the first diaphragm, and the heat dissipation holes are integrally formed with the first diaphragm.

Preferably, the exterior of the positive terminal is provided with miniature cooling holes, and the miniature cooling holes are integrally formed with the positive terminal.

Preferably, an electrolyte is provided inside the positive plate, and the electrolyte is fixedly connected to the positive plate.

Compared with the prior art, the beneficial effect of the utility model is: a lithium-ion cell with a large rate discharge of the utility model, by setting the external component and the internal component, the inner wall of the aluminum-plastic packaging film is provided with a heat-conducting silica gel The thermally conductive silicone plate can transfer the heat generated inside the cell to itself, transfer the heat to the position, and speed up the heat dissipation rate of the cell, and there are cooling holes on the first diaphragm and the second diaphragm, the lithium-ion cell The positive and negative electrodes are slightly flatter and wider than the electrodes on the market, and the flat and wide design can increase the discharge rate.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the main view structure schematic diagram of the utility model;

Fig. 3 is the structural representation of the thermally conductive silica gel plate in the utility model;

In the figure: 10-external components, 11-negative terminal, 12-positive terminal, 13-aluminum-plastic packaging film, 20-internal components, 21-second diaphragm, 22-negative plate, 23-first diaphragm, 24-positive plate, 25-thermal silica gel plate, 26-negative insulating sheet, 27-positive insulating sheet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-3, the utility model provides a technical solution: a lithium-ion cell for high-rate discharge, including an external component 10 and an internal component 20, and the external component 10 includes a negative terminal 11, a positive terminal 12 and an aluminum plastic Packaging film 13, the left side of the upper surface of the aluminum-plastic packaging film 13 is provided with a negative terminal 11, the negative terminal 11 is fixedly connected with the aluminum-plastic packaging film 13, the upper surface right side of the aluminum-plastic packaging film 13 is provided with a positive terminal 12, and 12 is fixedly connected with the aluminum-plastic packaging film 13, and the internal component 20 includes a second diaphragm 21, a negative plate 22, a first diaphragm 23, a positive plate 24, a heat-conducting silica gel plate 25, a negative insulating sheet 26, and a positive insulating sheet 27. The inner wall of the film 13 is provided with a heat-conducting silica gel plate 25, which is fixedly connected with the aluminum-plastic packaging film 13, and the inner wall of the heat-conducting silica gel plate 25 is provided with a second diaphragm 21, which is fixedly connected with the heat-conducting silica gel plate 25 , the inside of the second diaphragm 21 is provided with a negative plate 22, the negative plate 22 is fixedly connected to the second diaphragm 21, the inner wall of the negative plate 22 is provided with a first diaphragm 23, the first diaphragm 23 is fixedly connected to the negative plate 22, the first The inside of the diaphragm 23 is provided with a positive plate 24, the positive plate 24 is fixedly connected to the first diaphragm 23, the outer wall of the negative terminal 11 is provided with a negative insulating sheet 26, the negative insulating sheet 26 is fixedly connected to the negative terminal 11, and the outer side of the positive terminal 12 The wall is provided with a positive insulating sheet 27 , and the positive insulating sheet 27 is fixedly connected with the positive terminal 12 .

In this embodiment, the first diaphragm 23 and the second diaphragm 21 are important components in the lithium ion battery, and the diaphragm directly affects the capacity and internal resistance of the battery. For the lithium battery series, since the electrolyte is an organic solvent system, it is necessary to There are diaphragm materials resistant to organic solvents, and generally high-strength thin-film polyolefin porous membranes are used.

In this embodiment, a lithium-ion battery cell with high-rate discharge includes an external component 10 and an internal component 20. The inner wall of the aluminum-plastic packaging film 13 is provided with a heat-conducting silica gel plate 25, and the heat-conducting silica gel plate 25 can hold the lithium-ion battery cell. The heat generated inside is absorbed by itself and dissipated to the outside through the aluminum-plastic packaging film 13 .

Further, the thermally conductive silica gel plate 25 is located on the inner sidewall of the aluminum-plastic packaging film 13 and is fixedly connected with the aluminum-plastic packaging film 13 .

In this embodiment, the heat-conducting silica gel plate 25 is provided with a heat-conducting body inside, and the heat-conducting body mainly absorbs heat. The heat-conducting silica gel plate 25 is a thin rectangular shape wrapped around the outer wall of the second diaphragm layer 21 .

Further, the negative insulating sheet 26 is located under the outer wall of the negative terminal 11 and is fixedly connected to the negative insulating sheet 26 .

In this embodiment, the negative insulating sheet 26 is a flame-retardant insulating sheet with extremely strong insulating performance. The size, shape, and material of the negative insulating sheet 26 and the positive insulating sheet 27 are exactly the same.

Further, the inside of the first diaphragm 23 is provided with heat dissipation holes, and the heat dissipation holes and the first diaphragm 23 are integrally formed.

In this embodiment, the shape of the heat dissipation hole is a small circular hole, which can play a role in heat dissipation, and there are heat dissipation holes inside the first diaphragm 23 and the second diaphragm 21 .

Further, the positive terminal 12 is provided with micro cooling holes, and the micro cooling holes and the positive terminal 12 are integrally formed.

In this embodiment, the positive terminal 12 and the negative terminal 11 are flat cuboids. Wider terminals can increase the discharge rate, and there are miniature cooling holes outside the terminals, which can lower the temperature, reduce the resistance, and increase the discharge rate.

Further, an electrolyte is provided inside the positive plate 24 , and the electrolyte is fixedly connected to the positive plate 24 .

In this embodiment, the electrolyte is the carrier for ion transmission in the battery, generally composed of lithium salt and organic solvent, and the electrolyte plays the role of conducting ions between the positive and negative electrodes of the lithium battery.

The working principle and usage process of the utility model: after the utility model is installed, the lithium-ion battery cell is a device that can be recycled. The inside of the battery cell is made of layer-by-layer materials. Intercalation and deintercalation between the two electrodes. When charging, Li+ is deintercalated from the positive plate 24 and embedded in the negative plate 22 through the electrolyte. The negative plate 22 is in a lithium-rich state, and the opposite is true when discharging.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (6)

1. a kind of lithium-ion electric core of big multiplying power discharging, it is characterised in that：Including external module (10) and internal component (20), institute It includes negative terminal (11), positive terminal (12) and plastic-aluminum packaging film (13), the plastic-aluminum packaging film to state external module (10) (13) negative terminal (11) is equipped on the left of upper surface, the negative terminal (11) is fixed with the plastic-aluminum packaging film (13) The upper surface right side of connection, the plastic-aluminum packaging film (13) is equipped with the positive terminal (12), the positive terminal (12) and institute It states plastic-aluminum packaging film (13) to be fixedly connected, the internal component (20) includes the second diaphragm (21), negative plate (22), the first diaphragm (23), positive plate (24), thermal conductive silicon offset plate (25), negative electrode insulator (26) and positive insulating trip (27), the plastic-aluminum packaging film (13) madial wall is equipped with the thermal conductive silicon offset plate (25), and the thermal conductive silicon offset plate (25) is fixed with the plastic-aluminum packaging film (13) The madial wall of connection, the thermal conductive silicon offset plate (25) is equipped with second diaphragm (21), and second diaphragm (21) is led with described Hot silica gel plate (25) is fixedly connected, and second diaphragm (21) is internally provided with the negative plate (22), the negative plate (22) It being fixedly connected with second diaphragm (21), the madial wall of the negative plate (22) is equipped with first diaphragm (23), and described the One diaphragm (23) is fixedly connected with the negative plate (22), and first diaphragm (23) is internally provided with the positive plate (24), The positive plate (24) is fixedly connected with first diaphragm (23), and the lateral wall of the negative terminal (11) is equipped with the cathode Insulating trip (26), the negative electrode insulator (26) are fixedly connected with the negative terminal (11), outside the positive terminal (12) Side wall is equipped with the positive insulating trip (27), and the anode insulating trip (27) is fixedly connected with the positive terminal (12).

2. a kind of lithium-ion electric core of big multiplying power discharging according to claim 1, it is characterised in that：The thermal conductive silicon offset plate (25) it is located at the madial wall of the plastic-aluminum packaging film (13), and is fixedly connected with the plastic-aluminum packaging film (13).

3. a kind of lithium-ion electric core of big multiplying power discharging according to claim 1, it is characterised in that：The negative electrode insulator (26) it is located at below the lateral wall of the negative terminal (11), and is fixedly connected with the negative electrode insulator (26).

4. a kind of lithium-ion electric core of big multiplying power discharging according to claim 1, it is characterised in that：First diaphragm (23) be internally provided with heat emission hole, the heat emission hole is integrally formed with first diaphragm (23).

5. a kind of lithium-ion electric core of big multiplying power discharging according to claim 1, it is characterised in that：The positive terminal (12) outside is equipped with miniature heat emission hole, and the miniature heat emission hole is integrally formed with the positive terminal (12).

6. a kind of lithium-ion electric core of big multiplying power discharging according to claim 1, it is characterised in that：The positive plate (24) Be internally provided with electrolyte, the electrolyte is fixedly connected with the positive plate (24).