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Safety protection device for electric vehicles
- Aug 21, 2018 -

The safety protection of electric vehicles is an important part, which is a reference parameter when users purchase vehicles.

1. Insulation resistance detection. The higher supply voltage puts higher requirements on the electrical safety of the whole vehicle, especially the more stringent requirements for the insulation performance of the high voltage system. Insulation resistance is an important parameter to characterize the electrical safety of electric vehicles. The relevant safety standards for electric vehicles are clearly defined. The purpose is to eliminate the potential threat of high-voltage electricity to vehicles and drivers and to ensure the safety of electric vehicle electrical systems. .

2. High voltage interlocking. The inverter is sealed in a high voltage box and cannot be disassembled by non-workers. However, there will be cases of staff negligence and non-workers forcibly disassembling. In order to prevent electric shock, a high-voltage interlock switch is designed on the inverter cover. As long as the inverter case is opened, the switch operates, and the controller receives The main relay to the signal disconnect system can avoid accidental electric shock.

3. Leakage protector. It is necessary to use a leakage protector for electric vehicles. Once a positive busbar or a negative busbar is connected to the vehicle body, the protector will alarm, which avoids the leakage of the motor casing into a high voltage positive pole. The person standing on the vehicle touches the negative pole and causes an electric shock. . This design also avoids high-pressure, high-voltage leakage of DC/DC systems in air conditioning systems.

To measure the safety of electric vehicles, in addition to looking at the structure of the car body, it is necessary to look at the safety protection device to effectively protect the user's damage.