A kind of high temperature aging treatment method of lithium ion battery

Abstract

The invention discloses a high-temperature aging treatment method for a lithium ion battery which is simple, easy to implement, safe and reliable, has uniform and stable treatment temperature, timely control, and can improve and enhance the thermal stability and consistency of the battery. Including the heating of the battery, the heating of the battery is to first wrap the battery with a separator or a closed container, then place the battery wrapped in the separator or a closed container into a corresponding container, and add a liquid heating medium into the container , The battery wrapped in the separator film in the container is heated and aged at the required temperature through the liquid heating medium.

Description

technical field [0001] The invention relates to a manufacturing method of a lithium ion battery, in particular to a high temperature aging treatment method of the lithium ion battery. Background technique [0002] As lithium-ion batteries are more and more widely used in various fields including industry and life, especially in some special fields, electrical appliances have high requirements for power density, volume energy density, safety performance, and high energy consumption power. system. At present, in addition to the capacity and power of the battery, the key factor restricting the application of lithium-ion batteries is safety. The safety issues of lithium-ion batteries involve the entire production process and use process of lithium-ion batteries, which are not only related to use, but also related to the production and manufacturing process; in the manufacturing process of lithium-ion batteries, the safety of high-temperature aging is the most critical. At pres...

AI Technical Summary

Problems solved by technology

The safety issue of lithium-ion batteries involves the entire production process and use process of lithium-ion batteries. It is not only related to use, but also related to the manufacturing process; in the manufacturing process of lithium-ion batteries, safety during high-temperature aging is the most critical At present, lithium-ion battery factories all over the world have safety problems when they are over-aging to varying degrees, which not only causes damage to lithium-ion batteries in batches, but even causes fires; how to ensure the safety and stability of lithium-ion batteries , and reliability is a worldwide problem, especially the existing aging treatment method that uses very strong and sealed containers with electric heating or heating by other means. By raising the overall temperature of the container and then raising the temperature of the battery, this aging The method not only consumes a lot of energy, but its biggest problem is that the aging temperature is not uniform, and the control and adjustment of the temperature cannot be transmitted to each specific battery in a timely, rapid, effective, and uniform manner. In order to avoid safety accidents, multiple Personnel guards on duty. Once a certain battery has a safety problem for some reason, the available method is to use fire hydrant water to cool down the battery. If there is no way to control it, the battery in the entire processing space (processor) will be burned at most. So far So far, there is no effective method to ensure that lithium-ion batteries can be quickly and automatically processed without causing accidents when safety problems occur during the aging process; in addition, there is a comparison between the existing aging treatment methods and corresponding treatment devices. The obvious disadvantage is that due to the influence of unevenness in aging and heating, the thermal stability and consistency of battery products are relatively poor