Thermal Runaway is defined as which condition?

Thermal Runaway is defined as which condition?

• A. Overcharge condition
• B. Rise in battery temperature 100 degrees F and up
• C. Rise in charging current
• D. Decrease in voltage

Answer: (A)

Thermal runaway is a self-accelerating condition in a battery where the heat generated inside cannot be removed fast enough, causing the temperature to rise and reactions to feed more heat. In the context of this material, it is defined as an overcharge condition—charging the cell beyond its limit creates exothermic reactions and gas buildup that can drive that uncontrolled heat increase. A rise in temperature can happen, but it’s a symptom of the runaway process, not the defining trigger. A rise in charging current or a decrease in voltage aren’t the defining characteristics; they may occur alongside the event but don’t define it.

Thermal runaway is a self-accelerating condition in a battery where the heat generated inside cannot be removed fast enough, causing the temperature to rise and reactions to feed more heat. In the context of this material, it is defined as an overcharge condition—charging the cell beyond its limit creates exothermic reactions and gas buildup that can drive that uncontrolled heat increase. A rise in temperature can happen, but it’s a symptom of the runaway process, not the defining trigger. A rise in charging current or a decrease in voltage aren’t the defining characteristics; they may occur alongside the event but don’t define it.