Micro-hybrids

The Smart Hybrid Vehicle by Suzuki (SHVS) is a micro-hybrid system that uses a non-replaceable lithium-ion battery pack to power the combined alternator/generator to either start the engine under stop-start conditions or provide engine assistance. Given the right conditions, the alternator/generator charges both the lithium-ion pack and the EFB starter battery. The SHVS, as with systems from other manufacturers that use an alternator/generator, has a separate starter motor for cold starting.

Micro-hybrid vehicles incorporate emission-saving technologies that are not as demanding on batteries, even though they can still achieve lower fuel figures in the real world. The main advantage is that such vehicles rely on the less expensive EFB batteries. However, research the issue carefully and understand how any extra technologies work on your particular car. For example, Suzuki’s SVHS employs a non-replaceable lithium-ion battery pack fitted beneath the passenger seat. It is charged and discharged by a combined starter-alternator that operates via an ancillary belt (FEAD) drive; this places the starter battery under less stress, hence why an EFB battery is used. On the other hand, Mazda’s I-ELOOP uses a capacitor that stores and releases electrical energy quickly to reduce demand on the lead-acid starter battery, which employs EFB technology. From a safety perspective, some micro-hybrids run at higher than 12 volts, so be wary of this when working on a micro-hybrid electrical system, part of which may remain live after the main starter battery is disconnected.