"Fast charge half an hour, charge up to 80%", BYD advertising slogan, and caused a new round of fast charge technology hot debate. At the same time, some car friends also began to worry about the battery life of the car, in the face of surging fast charging technology, whether the battery life will be shortened? Choose fast charge, how to protect the car battery, prolong the service life.

First of all, we should understand the battery type of our car, mainly: lithium battery, iron battery, lead-acid battery and Titanic acid battery. Micro electric vehicle mainly uses lead-acid battery, fast charge damage is larger, not recommended to use. The choice of lithium battery models more, by fast charging impact is not big, according to the situation of choice oh. Byd uses iron batteries on a large scale, but its fast charge uses AC inverter charging and discharging, which has little impact on the battery. Tesla uses Titanic acid batteries, which are least affected by fast charging. Car users can choose whether the car's battery type is fast charging.

Secondly, from the perspective of charging technology principle, battery charging performance parameters mainly depend on battery density, material, temperature and battery management system (BMS). The battery density, material and temperature determine the charging speed. The battery management system BMS automatically adjusts the current, which is also the manufacturer's protection measure for the battery.

During fast charging, charging pile BMS control the input current and voltage, and charge the maximum power within the limit. During slow charging, the on-board BMS control the input current and voltage, and charge at the rated power. Due to the excellent play of BMS, the damage of both charging methods to the battery is controllable.

In general, the reasonable choice of fast charge, the key to distinguish good battery types, but also appropriate consideration of battery life.