Never maintained an electric car，If the electric vehicle is replaced，Will it be a trivial matter，​​The problem that needs more attention is: any maintenance operation on high -voltage vehicles，It is necessary to comply with relevant tips in the regulations of high -voltage electricity operation or diagnostic instrument，Because illegal operations will be in danger of life! As for training, then repair the electric car，It is also for the personal safety of the maintenance personnel。At least should be done after self -study，For example, which components must be understood by high -voltage electricity，The connection relationship of the high voltage system is shown in Figure 1。

Maintenance high voltage system，First, learn to cut off power and restore power supply。

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(1) Discount the maintenance plug;
(2) Strictly prevent the equipment re -closing the gate;
(3) Verification whether it has been power off (divided into two types: diagnostic inspection and manual electricity test);
(4) When the failure of the insulation resistance，Need insulation resistance measurement。

2. Recovery power after maintenance:
(1) High voltage reinstatement;
(2) High -voltage electrical technicians re -connected seabet iothe system through fault navigation;
(3) Check it out，See if all the equivalence lines are clean and in a good state;
(4) Visual inspection，See if all the high -voltage lines are in a good state;
(5) Visual inspection，Look at all the high -voltage system connection、Plug and bolt connection is normal and reliable;
(6) Insert the maintenance plug and lock it;
(7) Connect the ignition switch;
(8) Check the communication situation and read the data memory of the system;
(9) Record the results into the test report，and print out the test report;
(10) The reminder label "High -pressure system has been cut off" is removed from the car;
(11) The reminder label of "High -pressure System activated" is fixed to the obvious position on the vehicle。

Figure 1 Connection relationship of high voltage system