The HELIOS ESS battery is equipped with internal heating. When the battery’s internal temperature is below 5°C (41°F) and the battery is either connected to a charging source or SOC is 50% or more, energy is diverted to the internal heater to avoid the under-temperature fault.
The heating stops when:
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The battery’s internal temperature reaches 8°C (46.4°F).
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Once the cell temperature reaches this threshold, all the energy is directed to charging the cells.
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No charge current is detected and SOC is less than 50%.
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After the heating stops, if the battery’s internal temperature drops below 5°C (41°F) and the battery is connected to a charging source, the heater turns ON again.
For information about internal heating, refer to Protection Specifications and Internal Heating Specifications.
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NOTE |
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Charging and heating can occur simultaneously. However, the BMS will not allow charging to continue when cell temperature drops below 4°C (39.2°F) for 5 seconds. |