In the rush to deliver an electric car to the masses, General Motors Corp. is finding that the all-important battery might not be the only major hurdle. The heating and cooling systems, for example, are a challenge because they typically are built to run off a traditional fuel combustion engine. That means new types of air conditioning and heating systems must be built.
GM, in a high-stakes race with Toyota Motor Corp. to turn out an affordable, effective battery-powered car, has found that while the lithium-ion batteries themselves are hitting all the marks on early road tests, a host of other issues are beginning to crop up.
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