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release time:2024-07-08 Hits: Popular:AG11 battery
Studying LR41 battery from the perspective of optimizing electrolyte composition
The safety of ion LR41 battery is crucial to their application. For this reason, people have specially formulated safety test specifications such as LU-1462 and SU-2405.
Usually, people mainly use special charging circuits to control the charging and discharging process of LR41 battery, prevent overcharging and discharging of LR41 battery, and achieve safety protection of ion LR41 battery; there are also special safety lubricants and thermistors installed on LR41 battery as safety measures. These methods mainly achieve the purpose of battery safety protection through external means. Optimizing the performance of materials used in LR41 battery and selecting appropriate charging and discharging systems are expected to improve the safety of ion LR41 battery from the perspective of the battery itself and ultimately solve its safety problems.
This paper selects button ion LR41 battery (LRI2302 type) as the research battery. Mainly from the perspective of optimizing electrolyte composition, it discusses the safety of ion LR41 battery with different electrolyte additives, especially the effects of gas expansion and overcharge prevention performance during formation.
When preparing button ion LR41 battery, gas expansion is often generated during the battery formation stage due to the precipitation of gas in the battery, causing the thickness of the battery to exceed the standard. The solution to gas expansion can be solved by the method of open formation, but this will increase costs and production time. For this reason, the method of adding functional additives to the battery was tried. The initial capacity of the battery using different electrolyte additives and the average thickness change of the battery before and after formation are given. It can be seen that after adding VC functional additives, both the iron phosphate battery system and the cobalt battery system can help to improve the battery capacity and suppress the problem of excessive thickness caused by battery gas expansion. Further side tests show that the addition of additives can also improve the battery cycle capacity to a certain extent. After adding the overcharge protection additive triethylamine and biphenyl, there are some side effects compared with the battery with VC electrolyte.
Among them, for the battery with triethylamine and VC mixed additives, the addition of triethylamine offsets the effect of VC on the capacity improvement; while for the battery with biphenyl and VC additives, it can better suppress the problem of battery size exceeding the standard due to gas expansion, and the impact on the capacity is also small.
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