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definition:battery_dis-_charge_sequence [2019/07/01 21:12] admin |
definition:battery_dis-_charge_sequence [2020/09/16 21:41] (current) |
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| Example 2. The battery voltage is 600V in initial, the maximum charging current (Max charging current) is 100A, the requested charging power (Target active power) is 50kW, the PWS2-30K will charge in 50kW, because the charging DC current is just $50kW\div 600V=83A$, and as the voltage rises, such as 660V, the power is still 50kW, because the charging DC current is $50kW\div 660V=76A$. But if 670V is the constant voltage charging threshold set by user, when the voltage reaches 670V, the power will reduce gradually till 0. | Example 2. The battery voltage is 600V in initial, the maximum charging current (Max charging current) is 100A, the requested charging power (Target active power) is 50kW, the PWS2-30K will charge in 50kW, because the charging DC current is just $50kW\div 600V=83A$, and as the voltage rises, such as 660V, the power is still 50kW, because the charging DC current is $50kW\div 660V=76A$. But if 670V is the constant voltage charging threshold set by user, when the voltage reaches 670V, the power will reduce gradually till 0. | ||
| - | ===== float charge voltage ===== | + | ===== Float charge voltage ===== |
| The float charge is **ONLY for lead-acid or lead-carbon battery**. For lead batteries, the float charging voltage shall be a little lower than slow charge voltage (topping charge mode), and there is a threshold called " | The float charge is **ONLY for lead-acid or lead-carbon battery**. For lead batteries, the float charging voltage shall be a little lower than slow charge voltage (topping charge mode), and there is a threshold called " | ||
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| But lithium batteries shall not be float charged. So care must be taken to these parameters: | But lithium batteries shall not be float charged. So care must be taken to these parameters: | ||
| - | * float charging voltage shall be set same as slow charging voltage\ | + | |
| - | * "current threshold from topping charge to float charge" | + | * **current threshold from topping charge to float charge** (legacy name: equal charge to Float charge current) |
| In order to maintain capability for both lithium-ion and lead-acid (carbon), Sinexcel inverters use above settings to differentiate them. | In order to maintain capability for both lithium-ion and lead-acid (carbon), Sinexcel inverters use above settings to differentiate them. | ||