Alliance Intelligent Battery Series
TM
User’s Guide
© 2020 American Battery Solutions Inc. All rights reserved. The data herein is intended as a guide and does not reflect the specification range for any particular property of this
product. Such data is based upon analysis of representative samples and not the actual product shipped. We based the information on data believed to be reliable on the date
compiled, but we do not represent, warrant, or otherwise guarantee, expressly or impliedly, the merchantability, fitness for a particular purpose, freedom from patent
infringement, suitability, accuracy, reliability, or completeness of this information or the products, materials or processes described.
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Over-Current Protection
The Alliance Intelligent Battery Series™ calculates current limits based upon current
direction (Discharge/Charge), State of Charge (SOC), temperature, current value and
amount of time at the current value.
Figure 10: BMS Current Control Limits
The Alliance Intelligent Battery Series™ battery supports 2 level of over current
protection.
1.
Overcurrent Protection
– will trigger if the sensed current exceeds the allowed
current limits for a time. In the event of exceeding the current limits the BMS FETs
will open interrupting current to the system and will remain open for up to 60
seconds.
2.
Hardware Overcurrent
– Exceeding the Hardware Overcurrent threshold (250 A)
will cause the BMS FETs to open, interrupting current to the system and will remain
open for up to 60 seconds. The Hardware Overcurrent protection is designed to
protect the battery and operator from external short circuits.
Over-Discharge Protection (Under-Voltage Protection)
As the battery nears 0% State of Charge (SOC), the terminal voltage begins to drop
rapidly. The Alliance Intelligent Battery Series™ is considered fully discharged when
any one of its internal cell voltages falls to 3.0 volts or the battery’s terminal voltage is
approximately 42 volts.
The Alliance Intelligent Battery Series™ is designed to enter an Under-Voltage
Protection (UVP) state if any cell drops below 2.75 volts. In the UVP state, the Alliance
Intelligent Battery Series™ will disconnect its terminals causing the output voltage to