Could active thermal battery management in Nissan e-NV200 foreshadow future LEAFs?
Most electric vehicles use what is known as active liquid thermal management to control the temperature of their valuable battery packs. The systems are effective at keeping the battery temperature within the desired operating range, but add complexity, cost, and weight. For those reasons, Nissan felt it could do without active liquid cooling in the best-selling LEAF.
With the exception of a few cases in extreme desert climates such as Pheonix, the LEAF has not had major problems with batteries getting too hot and drastically affecting performance and longevity. The vehicle’s passive cooling system, which simply sheds heat to the atmosphere through forced air convection, has largely gotten the job done. To combat extreme cases the company will deploy a more heat-tolerant battery chemistry in future models.
Nissan e-NV200 – different use cases, different cooling needs
The Nissan e-NV200 is a commercial van that uses the same powertrain found in the LEAF. However, the vehicle will serve a very different purpose: Nissan expects the e-NV200 to see heavy daily use and frequent DC fast charging as a result of fleet demands, which can generate significant heat in the battery. The battery pack is also more tightly packaged in the e-NV200 than in the LEAF, leaving less space for air circulation around the cells.