Indore tragedy: why do EV batteries catch fire? | Explained - The Hindu
Electric vehicle (EV) battery fires, though uncommon, have raised concerns after recent incidents like the Indore tragedy. Most EVs use lithium-ion batteries, which store large amounts of energy in a compact space. Under certain conditions such as overheating, manufacturing defects, physical damage, or improper charging, these batteries can undergo “thermal runaway.” This is a chain reaction where rising temperature triggers further heat generation, eventually leading to fire or explosion. Poor battery management systems and lack of proper cooling can worsen the situation. External factors like high ambient temperatures or use of uncertified chargers also increase risks. However, experts note that EV fires are relatively rare compared to fuel-based vehicle fires. Advances in battery design, stricter safety standards, and better monitoring systems are being developed to reduce such incidents and improve overall EV safety for users.
The Key points
- EV batteries mainly use lithium-ion technology for energy storage.
- Thermal runaway is the main cause of EV battery fires.
- Overcharging and overheating increase fire risks significantly.
- Manufacturing defects can trigger internal short circuits.
- Physical damage to batteries may lead to sudden ignition.
- High temperatures worsen battery instability issues.
- Poor-quality chargers can cause unsafe charging conditions.
- Battery management systems play a key safety role.
- EV fires are less frequent than petrol vehicle fires.
- Improved safety standards aim to reduce future incidents.
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