-How to balance mismatched lithium batteries?

How to balance mismatched lithium batteries?
author:enerbyte source:本站 click290 Release date: 2023-11-29 09:15:00
abstract:
1. The capacity error of lithium-ion batteries is absolute, and this error is expanding with the use of lithium-ion batteries. Factory assembly can only delay the time for significant errors in lithium-ion batteries, ultimately leading to serious capacity errors. So, error is absolute, and the...

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1. The capacity error of lithium-ion batteries is absolute, and this error is expanding with the use of lithium-ion batteries. Factory assembly can only delay the time for significant errors in lithium-ion batteries, ultimately leading to serious capacity errors. So, error is absolute, and the purpose of developing lithium-ion battery protection and balancing systems is only to alleviate this error and prevent the danger it brings. Capacity balancing is impossible and should not be pursued as a goal of balancing.

2. At present, there is a method of capacity compensation, which is to remove some of the electricity from high capacity lithium-ion batteries to compensate for the consumption of low capacity batteries. There is no problem with this method in theory, but it is very difficult to implement in practice, especially in terms of efficiency.

3. A balanced charging voltage is necessary, otherwise some lithium-ion batteries may experience undercharging during the later stages of charging. Part of lithium-ion batteries are overcharged and under charged, which affects the battery's lifespan. Overcharging can lead to danger.

4. It is better to do undervoltage protection than to do discharge balancing, so that any single lithium-ion battery with undervoltage can be powered off for protection to prevent the danger caused by over discharge.

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