Wang Jianliang
After two and a half years of unremitting efforts, a few days ago, China National Heavy Duty Truck designed and manufactured hydrogen fuel terminal tractors formally rolled off in Jinan. According to Wei Zhihai, head of the China National Heavy Duty Truck Group's new energy automotive project leader, China National Heavy Duty Truck started hydrogen fuel vehicle R&D in December 2014 and signed a cooperation agreement with a Canadian company. The first prototype completed assembly in May of this year. More than one month's full load test has been passed. "It can be said that this step we have taken in the field of hydrogen fuel vehicles has been successful." Wei Zhihai said.
It is understood that the hydrogen fuel traction vehicle adopts an upsizing technology plan, and the fuel cell is used as a range extender. The hydrogen bottle can be configured according to actual needs to meet various operating conditions. The vehicle uses hydrogen as its fuel, and the power battery as an auxiliary system. It can be filled with hydrogen through a hydrogenation time of 3 to 5 minutes. The power battery almost eliminates the need for power supply, thus avoiding the problem of prolonged charging of pure electric vehicles. Hydrogen fuel technology, as a technological alternative to traditional vehicles, pure electric vehicles and hybrid vehicles, is expected to refresh the existing industry landscape.
OEM is "original equipment manufacturer" which means the battery is identical to what was originally supplied with the phone. Non-OEM is a battery made by a different company that reverse-engineered the original battery and started producing functionally-equivalent copies for sale into the same application.
There is no hard and fast rule, but generally people perceive OEM to be higher quality and more reliable than non-OEM, as a result pricing will often be higher for OEM batteries. Batteries are difficult to manufacture consistently because minor variations in water content (parts per million) and minor mis-matching of the anode and cathode capacities (produced by micron thickness variations in coating processes) cause substantial cycle life reduction in the final battery. It could be the difference between getting 100 cycles out of a battery (not to hard) versus 500 (more challenging). OEM's might have a higher reject rate of marginal batteries, which leads to higher costs on the ones that do pass.
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