To demonstrate the working principle of the electric vehicle high-voltage interlock (HVIL) system, this training box primarily utilizes electrical components equipped with high-voltage interlock functionality, mainly high-voltage connectors and manual service disconnect (MSD).
The working principle of the high-voltage interlock (HVIL) is a safety design method that uses low-voltage signals to monitor the integrity of the high-voltage circuit. In theory, the low-voltage monitoring circuit is connected after the high-voltage circuit, maintaining a necessary lead time in between, the duration of which can be determined based on specific project requirements. The specific implementation form of the high-voltage interlock may vary in design across different projects.
II. Features
1. Physical cognition: Understand the structural form and connector style of high-voltage interlocking devices through physical observation of high-voltage interlocking devices;
2. Practical knowledge: Through the real plug-in and pull-out process of each pluggable high-voltage connector, the working principle of the high-voltage interlock low-voltage detection system protection is fully demonstrated;
3. Fault simulation: Through fault setting, when simulating a fault in the high-voltage interlock system, the simulated circuit breaker is disconnected, the buzzer alarms, the warning indicator lights up, the motor stops running, and the high-voltage connection is automatically disconnected to achieve the purpose of safety protection.
4. Power-on signal detection: Through voltage signal detection, observe the voltage changes of each detection terminal before and after the high-voltage interlocking system takes effect;
5. Static signal detection: Through on-off signal detection, observe the on-off changes of each detection terminal before and after the high-voltage interlocking system is firmly plugged in; it can also be seen that the high-voltage component is connected before the low-voltage monitoring component.
6. Through the working principle diagram of the high-voltage interlocking system drawn on the panel, the wiring method and control principle of the high-voltage interlocking system can clearly be seen;
III. Basic Parameter
1. Dimensions: 540mmx450mmx220mm(length x width x height)
2. Approximate weight: about 5KG
3. Operating voltage: AC220V, DC12V, DC5V
4. Working temperature: -20℃ - +40℃
5. Working power: ≤100W