A high current low cost assembled battery

Abstract

The utility model provides a kind of high current low cost assembled battery, including steel shell, charging head and polymer battery, the top side of steel shell is fixed with charging head, polymer battery is embedded in the inside of steel shell, the bottom of polymer battery is fixedly connected with negative electrode conductive sheet, the inside below of steel shell is fixed with elastic gasket, the top of polymer battery is fixedly welded positive electrode conductive sheet, the top of steel shell is fixed with positive cap.The utility model solves the problem that the contact area of the contact connection between the positive lug and the protection plate is too small, which prevents the high current from passing through.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a high-current, low-cost assembled battery. Background Technology

[0002] Cylindrical batteries are widely used in our daily lives, such as in electric toys, remote controls, and drones. Cylindrical batteries include disposable and rechargeable batteries. Rechargeable batteries are recyclable, making them more economical and environmentally friendly, effectively reducing the pollution caused by discarded batteries. Existing rechargeable batteries include those with USB charging interfaces and those that require a charger. Current rechargeable batteries typically use lithium batteries (liquid lithium-ion batteries). The lithium battery is shortened, and then a metal casing, charging protection board, and positive electrode cap are installed at the positive terminal. The bottom of the metal casing is laser-welded to the top of the lithium battery casing to achieve the negative electrode connection. While existing battery assembly methods can stably carry large currents, they require significant labor and material costs. Although contact-type positive and negative electrode connections can save on labor and material costs, insufficient contact area and poor contact can lead to overheating, increased internal resistance, and inability to carry large currents, making them inconvenient to use. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the above-mentioned background technology and to propose a high-current, low-cost assembled battery.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high-current, low-cost assembled battery includes a steel casing, a charging head, and a polymer battery. The charging head is fixed to the top side of the steel casing, the polymer battery is embedded inside the steel casing, a negative electrode conductive sheet is fixedly connected to the bottom of the polymer battery, an elastic pad is fixed to the lower inside of the steel casing, a positive electrode conductive sheet is welded to the top of the polymer battery, and a positive electrode cap is fixed to the top of the steel casing.

[0005] Preferably, the positive electrode conductive sheet is welded to the top of the polymer battery by a wire, the top of the positive electrode conductive sheet is connected to the upper interior of the steel shell by an insulating rod, and the top of the positive electrode conductive sheet is electrically connected to the positive electrode cap.

[0006] Preferably, the negative electrode conductive sheet is arranged in the shape of the letter "L", and the negative electrode conductive sheet is connected to the inner bottom and inner sidewall of the steel shell by contact to increase the conductive contact area.

[0007] Preferably, the bottom of the polymer battery is in close contact with the top of the elastic pad, and the bottom of the polymer battery is also equipped with a side tab, which is in contact with the negative electrode conductive sheet (2).

[0008] Preferably, an insulating elastic band is installed between the elastic pad, the side tabs and the outer surface of the polymer battery to protect the aluminum-plastic film on the outer surface of the polymer battery.

[0009] This invention solves the problem that the contact area between the positive electrode tab and the protection board is too small, preventing large currents from passing through. The negative electrode increases the contact area by contacting the bottom and sides of the steel shell, thus solving the problem of large currents passing through and effectively reducing manual welding and material costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front cross-sectional view of the overall structure of this utility model; Figure 3 This is a partial structural diagram of the polymer battery in this utility model.

[0011] Legend: Steel shell 1, charging head 101, polymer battery 102, negative electrode conductive sheet 2, elastic band 201, elastic pad 202, positive electrode conductive sheet 3, positive electrode cap 301. Detailed Implementation

[0012] Example 1, referring to Figure 1-3 A high-current, low-cost assembled battery includes a steel shell 1, a charging head 101, and a polymer battery 102. The charging head 101 is fixed to the top side of the steel shell 1, and the polymer battery 102 is embedded inside the steel shell 1. The polymer battery 102 is characterized in that a negative electrode conductive sheet 2 is fixedly connected to the bottom of the polymer battery 102, an elastic pad 202 is fixed to the lower part of the inside of the steel shell 1, a positive electrode conductive sheet 3 is welded to the top of the polymer battery 102, and a positive electrode cap 301 is fixed to the top of the steel shell 1.

[0013] The positive electrode conductive sheet 3 is welded to the top of the polymer battery 102 by a wire. The top of the positive electrode conductive sheet 3 is connected to the upper part of the steel shell 1 through an insulating rod. The top of the positive electrode conductive sheet 3 is electrically connected to the positive electrode cap 301. The positive electrode conductive sheet 3 is welded to the protection plate on top of the polymer battery 102 by wires, which can solve the problem of the small contact area between the positive electrode tab and the protection plate, so that the large current can pass through normally and stably.

[0014] Example 2 differs from Example 1 in that, in this example, the negative electrode conductive sheet 2 is arranged in the shape of the letter "L". The negative electrode conductive sheet 2 is connected to the inner bottom and inner sidewall of the steel shell 1 through contact to increase the conductive contact area. The bottom of the polymer battery 102 is in close contact with the top of the elastic pad 202. The bottom of the polymer battery 102 is also equipped with a side tab, which is in contact with the negative electrode conductive sheet 2. An insulating elastic band 201 is installed between the elastic pad 202, the side tabs and the outer surface of the polymer battery 102 to protect the aluminum-plastic film on the outer surface of the polymer battery 102. The negative electrode conductive sheet 2 is connected to the bottom and side of the steel shell 1 through a contact connection, increasing the contact area; The elastic pad 202 at the bottom of the polymer battery 102 and the contact points between the side tabs and the main body of the polymer battery 102 are insulated by the insulating elastic band 201, which protects the aluminum-plastic film on the outer surface of the polymer battery 102 from being scratched and increases the reliability of the contact points.

[0015] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these should also be considered within the scope of protection of this utility model. These will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. A high-current, low-cost assembled battery, comprising a steel casing (1), a charging head (101), and a polymer battery (102), wherein the charging head (101) is fixed to the top side of the steel casing (1), and the polymer battery (102) is embedded inside the steel casing (1), characterized in that, The bottom of the polymer battery (102) is fixedly connected to a negative electrode conductive sheet (2), the lower part of the inside of the steel shell (1) is fixed with an elastic pad (202), the top of the polymer battery (102) is welded with a positive electrode conductive sheet (3), and the top of the steel shell (1) is fixed with a positive electrode cap (301).

2. The high-current, low-cost assembled battery according to claim 1, characterized in that, The positive electrode conductive sheet (3) is welded to the top of the polymer battery (102) by a wire. The top of the positive electrode conductive sheet (3) is fixedly connected to the upper interior of the steel shell (1) by an insulating rod. The insulating rod is used to achieve insulation support between the positive electrode conductive sheet (3) and the steel shell (1). The top of the positive electrode conductive sheet (3) is electrically connected to the positive electrode cap (301).

3. The high-current, low-cost assembled battery according to claim 1, characterized in that, The negative electrode conductive sheet (2) is arranged in the shape of the letter "L". The negative electrode conductive sheet (2) is connected to the inner bottom and inner sidewall of the steel shell (1) through contact to increase the conductive contact area.

4. The high-current, low-cost assembled battery according to claim 1, characterized in that, The bottom of the polymer battery (102) is in close contact with the top of the elastic pad (202). The bottom of the polymer battery (102) is also equipped with a side tab, which is in contact with the negative electrode conductive sheet (2).

5. The high-current, low-cost assembled battery according to claim 1, characterized in that, An insulating elastic band (201) is installed between the elastic pad (202), the side tabs and the outer surface of the polymer battery (102) to protect the aluminum-plastic film on the outer surface of the polymer battery (102).

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