Charging Methods of VRLA Battery
1. Float Charge:
Normally In Constant Voltage And Limited Current Method. Select Constant Voltage: 25C°, NP Series 2.25~2.3V/Battery; GM Series 2.23~2.25V/Battery;
The Current Is Limited In 0.2CA (C: Means The Rated Capacity Of The Battery). When The Temperature Is Higher Or Lower Than 25C°, The Float Charge Voltage Should Be Adjusted. The Rate Of The Adjustment Is –3mV/°C Battery.
2. Cycle Charge:
Normally In Constant Voltage And Limited Current Method. Current Is Limited Under 0.2CA. When The Temperature Is 25 C°, NP Series 2.4V/Battery; GM Series 2.35V/Battery. When The temperature Is Higher Or Lower Than 25 C°, The Voltage Should Be Adjusted. The Adjustment Rate Is –4mV/° C Battery.
3. Balanced Charge:
Firstly The Battery Should Be Charged With Constant Current. Then Be Charged According To: NP Series 2.4/Battey, GM Series 2.35V/Battery. The Charge Time Is Depended On The Discharge Deep. Details As Follows:
Discharge Deep (%) | Current Of Constant Current Charge(A) | Constant current Transfer to Constant Voltage (H) | Voltage Of Constant Voltage Charge (V) | Charge Time (H) |
20 | 0.1C10 | 1.5 | 2.35 | 12 |
0.125 C10 | 1.0 | 2.35 | 10 | |
50 | 0.1 C10 | 3.8 | 2.35 | 18 |
0.125 C10 | 2.8 | 2.35 | 16 | |
80 | 0.1 C10 | 6.3 | 2.35 | 22 |
0.125 C10 | 4.5 | 2.35 | 20 | |
100 | 0.1 C10 | 8 | 2.35 | 26 |
0.125 C10 | 6 | 2.35 | 24 |
Note: When Float Charge, If Any Battery’s Float Charge Voltage Is Lower Than 2.2V/Cell In A Battery Group, The Battery Should Be Charged In Balance.
4. Compensating Charge:
The Battery Will Lose Some Capacity In The Transportation Or Store. The Battery Should Be Charged Before Use If The Store Time Is Too Long.
If Store Time Between 6 Months To One Year, The Battery Should Be Charged For 3 Days In Balanced Voltage 2.25V/Battery.
If Store Time Between One To Two Years, The Battery Should Be Charged For 3 Days In Balanced Voltage 2.30V/Battery.
