BoostLi Energy Storage Module ESM-48100B1
User Manual
2 Application Description
Copyright © Huawei Technologies Co., Ltd.
2.3 Application in Class B Environments with Direct
Ventilation
The ESM can be used in class A or B environments with direct ventilation but cannot be used
separately in class C or D environments. If the ESM needs to be used in class C or D
environments, cabinets with air conditioners and a high IP rating (IP55 or higher) must be
deployed.
Environments subject to atmospheric corrosion can be classified into four categories:
Class A environment (controlled environment): refer to indoor environments where the
ambient temperature and humidity are controlled (including rooms where people live)
and the relative humidity of air is controlled below 65%.
Class B environment (uncontrolled environment): refer to indoor environments where
the ambient temperature and humidity are not controlled or outdoor environments (with
simple shielding measures) where the humidity can reach 100%.
Class C environment (harsh environment): refer to outdoor land environments (with
simple shielding measures) near seas or pollution sources. If a site is near a sea, it is
0.5–3.7 km away from the sea. If a site is near a pollution source, it is at most 3.7 km
away from salt lakes, 3 km away from heavy pollution sources such as smelteries, coal
mines, and thermal power plants, 2 km away from medium pollution sources such as
chemical, rubber, and galvanization industries, or 1 km away from light pollution sources
such as packing houses, tanneries, and boiler rooms.
Class D environment (sea environment): refer to outdoor land environments (with simple
shielding measures) at most 500 m away from the seashore or environments on the sea.
2.4 Low-Temperature Application
Low-temperature charging: The ESM does not support battery charging at a temperature
below 0°C. When the battery temperature is below 0°C, the ESM will shut down the
charging loop to disable charging.
When the ESM is used in an environment below 0°C, a heater needs to be added in the
cabinet, and batteries can be charged after the battery temperature rises to 3°C or above.
Low-temperature discharging: The ESM does not support battery discharging at a
temperature below –20°C. When the battery temperature is below –20°C, the ESM will
shut down the discharging loop to disable discharging.
When the ESM is used in an environment below –20°C, a heater needs to be added in the
cabinet, and batteries can be discharged after the battery temperature rises to –17°C or
above.
2.5 Storage with Low SOC (≤ 5%)
The ESM has ESMU static power consumption and self-discharge loss after power-off. In
actual application scenarios, avoid storing an ESM with low SOC (≤ 5%). If unavoidable,
limit the storage duration to 30 days at 25°C or 15 days at 45°C. Promptly recharge the ESM
after the storage. Otherwise, the ESM may be damaged due to overdischarge, which requires
replacing the ESM.
The following situations may cause storage of ESMs in discharge state:
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