Charging NiMH from solar and off-grid sources: variable/intermittent input current, maximum-power-point tracking, PWM/pulse charge management, termination when no steady current exists, and why NiMH's tolerance suits remote-power duty.
Design of consumer NiMH AA/AAA smart chargers: independent per-bay channels, -dV/dT termination per cell, refresh modes, the 0.5-1C two-to-four-hour fill versus 0.1C overnight, and usability/safety features that define a quality charger.
How hybrid-electric vehicles charge NiMH traction batteries: high-rate regenerative-braking pulses, high-rate partial-state-of-charge operation, pulse-power resistance testing, thermal management and the longevity lessons of production HEV packs.
Cell balancing for series NiMH: passive bleed balancing, active charge redistribution, charge-profile shaping and rest-based equalisation; what works given NiMH's recombination self-discharge and how to size a balancer.
How capacity, SOC and impedance mismatch in series NiMH strings causes unequal charging, early recombination in the strongest cell, blurred pack -delta-V and overcharge of laggards; matching, topology and detection.
Pack-level thermal design for NiMH charge: heat generation distribution, conduction and airflow paths, cell arrangement and spacing, NTC placement and number, and control from the hottest cell to prevent runaway during fast charge.
High-temperature NiMH charging: lowered oxygen-evolution potential, faster corrosion, the vanishing -delta-V, derating curves and thermal-aware termination, for hot enclosures, engine-bay and tropical deployments.
Low-temperature NiMH charging: slowed kinetics and recombination, pressure and charging limits below 0 C, pre-heat and conditioning-current strategies, and charge profiles for outdoor, winter and cold-chain equipment.
