What design feature helps prevent fire and electric shock hazards in EVs?

• A. Redundant systems
• B. Direct cooling with water
• C. Lightweight aluminum frame
• D. Smaller battery capacity

Answer: (A)

Redundancy in safety systems is the design approach that directly reduces both fire and electric shock hazards. By building multiple independent safety paths and barriers for critical high‑voltage functions, the system stays safe even if one component fails. In an EV, this means having backup contactors, separate sensing and interlock circuits, multiple fuses or disconnections, and independent cooling or insulation paths so a single fault cannot lead to exposed high voltage or uncontrolled heating. If one part sticks or misreads, the others keep the HV circuit isolated and the battery temperature controlled, preventing dangerous conditions.

Direct water cooling helps manage heat, but leaks or pump failures can still create hazards, so cooling alone doesn’t guarantee fault tolerance. A lightweight aluminum frame mainly affects weight and structure, not electrical safety, and smaller battery capacity reduces energy but doesn’t address fault tolerance or isolation.