INTRODUCTION (HEADING /)
Vehicles are the important means of conveyances in
modem society. It caused the energy becoming less and
less and the pollution of the environment as well as it
provides lots of convenience to people. People concern the
way of how to deal with that well more and more. As no
emission, EV using new energy is one of the best way to
take place of internal-combustion engine ones. One of EV
power system's important characteristics is high voltage
and large current. They are both for adapting special
requirements and promoting efficiency that the voltage of
system is more than 300V and resistance of loop is low.
The normal working current may reach tens or hundreds
ampere, and it will become manifold when short circuit
happened. Therefore, it is not only satisfactory for driving
requirements, but also for the safety of driver, car
operation, and the environment when design the high
voltage power system. It is required that there are
corresponding safety measures for followings:
creepage distance and ventilation of the on-board
energy storage device, protecting of power batteries
overcorrect, keeping EV working normally, avoiding out
of working, personnel anti-electric short, testing for safety.