Regarding Lishen cells, it has been pointed out here that what is seen between the aluminum case and the negative terminal is considerable leakage current.. With EVE cells it was confirmed here when measuring between the cells negative and the aluminum case there was very little leakage current.
It would be helpful if anyone else can test one of their Lishen cells by applying some type of load between the negative terminal and the aluminum case. Please do it safely. The Lishen spec sheet does note to not connect the raw aluminum cases together but I am surprised they don't mention the aluminum case is positive, and they don't note it in their drawings. So if anyone can confirm that the case is tied to positive, and/or the amount of leakage current it would be appreciated.
It's very possible other manufacturers are designing their cells with the case positive. So this is a general warning that could apply to any manufacturer regardless if it's noted in the spec sheet or not.
For anyone planning to clamp their cells tight, especially in a mobile application, it is suggested to put an insulator between the cells and do not rely only on the PVC wrap for insulation.
It would be helpful if anyone else can test one of their Lishen cells by applying some type of load between the negative terminal and the aluminum case. Please do it safely. The Lishen spec sheet does note to not connect the raw aluminum cases together but I am surprised they don't mention the aluminum case is positive, and they don't note it in their drawings. So if anyone can confirm that the case is tied to positive, and/or the amount of leakage current it would be appreciated.
It's very possible other manufacturers are designing their cells with the case positive. So this is a general warning that could apply to any manufacturer regardless if it's noted in the spec sheet or not.
For anyone planning to clamp their cells tight, especially in a mobile application, it is suggested to put an insulator between the cells and do not rely only on the PVC wrap for insulation.
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