It is the semi-annual high voltage full balancing time again.
I have 3 Sinopoly 200Ah cells exhibit this issue.
The lug and terminal are properly tightened. Even used clamp.
Based on the cell specification, the Cut-off Current is 6.7A.
The voltage is steadily increasing until 3.65V @ 20A (CC stage done) and the current started to taper off.
But here is the strange thing during CV stage. Once the amperage lowers down to around 9A - 8A, the voltage cell suddenly dropped to 3.488V - 3.460V.
I used another charger for these cells, same issue. Used clamp to measure the amperage and yes, 8A-9A flowing in the cable.
Any idea why is this happening?
I have 3 Sinopoly 200Ah cells exhibit this issue.
The lug and terminal are properly tightened. Even used clamp.
Based on the cell specification, the Cut-off Current is 6.7A.
The voltage is steadily increasing until 3.65V @ 20A (CC stage done) and the current started to taper off.
But here is the strange thing during CV stage. Once the amperage lowers down to around 9A - 8A, the voltage cell suddenly dropped to 3.488V - 3.460V.
I used another charger for these cells, same issue. Used clamp to measure the amperage and yes, 8A-9A flowing in the cable.
Any idea why is this happening?