-(2)Why do lithium-ion batteries need to undergo aging experiments and aging detection?

(2)Why do lithium-ion batteries need to undergo aging experiments and aging detection?
author:enerbyte source:本站 click414 Release date: 2023-06-30 14:44:49
abstract:
Regarding high-temperature aging, aging after sealing is better However, it is certain that there are electrochemical kinetic changes in the aging process, which will greatly help the stability of sei and promote the stability of the electrochemical system....

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Regarding high-temperature aging, aging after sealing is better

However, it is certain that there are electrochemical kinetic changes in the aging process, which will greatly help the stability of sei and promote the stability of the electrochemical system.

Regarding lithium-ion batteries, the principle and purpose of aging is to ensure sufficient infiltration of the electrolyte, and to deactivate certain active components in the positive and negative electrode materials through certain reactions, making the overall performance of the battery more stable. Many companies adopt high-temperature aging to accelerate this process, but high-temperature aging should pay attention to controlling time and temperature, Because high-temperature aging can cause more degradation of living materials than room temperature aging, with good control, complete reaction of active ingredients, stable performance of battery characteristics, poor control, and excessive reaction, it is highly likely that electrical performance will decrease, capacity will decrease, IR will increase, and even liquid leakage will occur

After high-temperature aging, the battery performance is more stable. The vast majority of lithium-ion battery manufacturers adopt high-temperature aging operation during the processing process, aging at a temperature of 45-50 degrees Celsius for 1-3 days, and then storing it at room temperature. After high-temperature aging, potential adverse phenomena of batteries will be exposed, such as voltage changes, thickness changes, and internal resistance changes, all of which directly test the comprehensive safety and electrochemical performance indicators of this batch of batteries.

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