The time of the Colin pulse constant rate phase is shortened by nearly one hour compared with the normal charger constant current + constant voltage phase, and the high-voltage section charging of this hour is a critical moment for water dispersion. Colin pulse uses the voltage parameter as the basis for turning the light. It is very accurate to turn the light into the intelligent pulse. The ordinary charger uses the current parameter as the basis for turning the light. Once the battery is vulcanized, the internal resistance is increased and the charging current is also increased. The lamp current can easily cause long-term charging in the high-pressure section and accelerate hydrolysis.