那么，是什么引起混合动力汽车的蓄电池组放电如此严重呢？
So, what could trigger such a deep discharge in a hybrid’s battery?
研究开发了混合动力电动车(HEV)中的辅助动力系统，采用一台小排量的发动机组成发电机组，既可以给电池组充电，发动机也可以直接驱动空调系统。
In this paper, the assistant power system of hybrid electrical vehicle (HEV) was an engine with small displacement, which could charge the battery and directly drive the air-conditioning system.
研究串联型混合电动大客车动力驱动系统关键部件，如牵引电机、发电机组和电池组性能参数的匹配以及“恒温器”控制策略。
Powertrain system for a series hybrid electric bus is studied. The study includes the performance parameters matching of key components and the "thermostat" control strategy.
他的理由是混合动力车需要搭载的电池组重量太大，在一定程度上抵消了该技术的节能效果。
His argument is that hybrids need to carry the weight of the battery too, to a certain extent offset by the effect of energy saving technology.
他的理由是混合动力车需要搭载的电池组重量太大，在一定程度上抵消了该技术的节能效果。
His argument is that hybrids need to carry the weight of the battery too, to a certain extent offset by the effect of energy saving technology.
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