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owenni2005

金虫 (正式写手)

[求助] 怎样解决一次锂电池开压升高问题?

如题,在做一次锂电池的过程中,发现电池开压会缓慢上升,而且储存温度越高,电池开压升高速率越快。

求助:电池开压升高的机理?特定电池(如锂-二氧化锰电池)开压的影响因素有哪些?
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owenni2005

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引用回帖:
2楼: Originally posted by lkl7907 at 2012-07-06 14:45:24
Pre-discharge can be used to make the OCV of Li-MnO2 lower. It's very normal in many manufacture.

谢谢!这个知道的,我们是专业的锂电池工厂,有完整的电池生产工艺。问题是电池经过化成和熟成处理后,电池开压会缓慢上升。想请教:电池开压升高的内在因素是什么?有什么方法可以控制电池的开压稳定?
3楼2012-07-06 16:10:08
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lkl7907

铜虫 (小有名气)

【答案】应助回帖


感谢参与,应助指数 +1
857688363: 金币+1, 感谢应助 2012-07-06 16:17:51
Pre-discharge can be used to make the OCV of Li-MnO2 lower. It's very normal in many manufacture.
2楼2012-07-06 14:45:24
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lkl7907

铜虫 (小有名气)

【答案】应助回帖

The key point would be the crystal water amount in MnO2. This is very hard to be eliminated completely by heat treatment. The aim of the predischarge is to make the crytal water away by discharge reaction.

The predischarge condition should have some affects on the targeting. You can do some studies on the current and the time.

In additioin, the moisture control of the whole process is also very important for the targeting control.
4楼2012-07-07 17:34:27
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lkl7907

铜虫 (小有名气)

A further question, what's your aging condition?
Did you do heat treatment after the final sealing?
5楼2012-07-07 17:37:25
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