Blog - Winston

The condition of the safety valve

The condition of the safety valve

01.Dec 2017
| Blog - Winston

 

Question: When making the regular inspection of the battery pack, I noticed that there is some salt-like powder around the safety valve. How does it come about?

Answer:

1. New cells

All cells shipped by GWL/Power are visually inspected before delivery. They are delivered in 100% perfect condition. If you receive a new cell right from the shipment and there is some dirt or moisture around the terminal, you should contact the shipping agent and place a complaint about the damage during the delivery. You can also contact GWL/Power for additional assistance prior using the cell.

2. Used cells – regular maintenance

As concerns cells that are used for some time already, these cells should be inspected regularly every few-hundred cycles. See support info here. There should be no leakage or substance around the terminals or around the safety valve. We suggest cleaning the cells every time the inspection is made.  You can use a lightly wet cloth to clean the outside of the cells.

3. Old cells – with no maintenance

For cells that are used for a long time, without being checked, see the following: As the air-pressure changes there may be some small amount of air that is released from the safety vent. With the humidity of the air, the particles of the cell may evaporate and condensate around the edge of the safety valve. Over the time a small amount of the “salty” particles may build-up.

There should be no issues with this situation. If the cell is operated regularly and there is no difference in the electric specifications and the performance of the cell, there is no need to worry. Just clean the area of the safety valve and keep the regular inspection of the cells.

4. Damaged cells

In case there is a cell that was overcharged or deeply discharged in the past, the chemical structure of the cell may be changed internally. Such a cell may have some leakage of the electrolyte or blowing of the shape. Such a cell was damaged by improper use. If the cell’s parameters do not correspond to the specifications, we recommend replacing the defective cell. Based on the user manual the defective cell should not be used with regular cells.

In case of additional support, we welcome your questions

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