Low-temperature soft package battery and method for manufacturing low-temperature soft package battery

Abstract

The invention discloses a low-temperature soft package battery and a manufacturing method of the low-temperature soft package battery. The low-temperature soft package battery is provided with a protective film, a tab set member and a roll core. In an actual application process, the positive tab is arranged at the central position of a positive plate, and the negative tab is arranged at the central position of a negative plate. Compared with the prior art in which the tabs are arranged at the end parts of pole pieces, the electron movement stroke is only half of the length of the positive plate and the length of the negative plate in the discharging process of the low-temperature soft package battery. Due to the structural design, the internal resistance of the low-temperature soft packagebattery can be greatly reduced, the overall impedance of the low-temperature soft package battery can be greatly reduced, the low-temperature soft package battery can also have good discharge performance in a low-temperature environment, and the discharge rate of the low-temperature soft package battery can be improved to a certain extent.

Description

technical field [0001] The invention relates to the technical field of pouch batteries, in particular to a low-temperature pouch battery and a method for manufacturing the low-temperature pouch battery. Background technique [0002] At present, a battery refers to a cup, tank or other container or part of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current, and is a device that can convert chemical energy into electrical energy. With positive and negative points. As technology advances, batteries generally refer to small devices that can generate electricity. Such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as the energy source can obtain stable voltage, stable current, stable power supply for a long time, and a current that is little affected by the outside world, and the battery structure is simple, e...

AI Technical Summary

Problems solved by technology

[0004] First, due to the existing pouch battery, its pole piece is usually in the shape of a strip, and the pole piece is provided with tabs, and the tab is located at the end of the pole piece. When the pouch battery is discharged, electrons need to flow from the pole piece Discharge can only be carried out when one end of the sheet moves to the other end. The travel of the electrons is equal to the total length of the electrode sheet. According to the law of resistance, the size of the resistance is proportional to the length. The longer the length, the greater the resistance. Some pouch batteries have poor discharge performance in low temperature environments due to their large internal resistance;

[0005] Second, due to the materials used to make the pouch battery, the material activity of the pouch battery will decrease at low temperature, which will lead to poor discharge performance of the pouch battery at low temperature.

[0006] For the above two points, the second point can greatly improve the shortcoming of poor low-temperature discharge performance by selecting materials that can still ensure activity under low temperature conditions to make pouch batteries. However, for the first point, it is necessary to change the soft pack battery. The structure of the pack battery has been improved, but there is no related structure in the prior art. Therefore, it is urgent to develop a soft pack battery that can ensure good discharge performance under low temperature conditions

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