“The reason we’ve done all this testing is to verify and ensure the customer is protected from any potential water intrusion into the battery which could affect the electronics,” Rob Drexler, Volt battery development engineer said in a statement.
The battery on the Volt, which will enter mass production at GM's Brownstown Township plant in the next few months is covered by the most comprehensive warranty available on the market: 8 years or 100,000 miles (160,000 km).
The warranty is transferable at no cost to other vehicle owners. It covers all 161 battery components, 95 percent of which are designed and engineered by GM, in addition to the thermal management system, charging system and electric drive components.
The same battery however will not help the Volt achieve the already announced 230 mpg (1liter/100 km) due to a bad... calculus method. The figure was calculated using an EPA methodology for plug-in electric vehicles that is currently about to change.
The old formula, which took into account kilowatt hours per 100 miles in order to define electrical efficiency, has not been approved by the regulators and a new method is currently under review.