Texas Instruments has introduced a fully integrated battery protection and cell-balancing solution for Li-Ion and lithium iron phosphate battery packs. The bq77910 can manage 4- to 10-cell battery packs, and two devices can be stacked to protect 11- to 20-cell packs. The device simplifies battery pack designs for e-bikes, e-scooters, portable gardening tools, power tools and uninterruptible power supplies (UPS) and can also be used when replacing lead acid batteries.
The bq77910 protects the battery pack by monitoring individual cell voltages and drives two N-channel power MOSFETs to interrupt current flow during fault conditions. Fault detection and recovery criteria for the device are fully programmable in non-volatile memory to suit all types of lithium battery systems. Low quiescent current (50 μA typical, 2,5 μA in shutdown mode) minimises battery discharge during storage or idle periods to optimise battery life.
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In addition to grid stability, DERMS also play a role in energy trading with some countries leveraging DERMS for real-time energy trading.
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