Fuser simulation system and fuser simulation method

Abstract

A fuse simulation system suitable for electric vehicles includes a fuse simulation circuit and a relay. The fuse simulation circuit is coupled to the electric vehicle's power management system and includes a current detection unit, a voltage detection unit, a pulse width detection unit, and a relay control unit. The power management system generates a preset pulse signal based on a simulated trigger event. The current detection unit, voltage detection unit, and pulse width detection unit are used to detect the current value, voltage value, and duration of the preset pulse signal, respectively. The relay control unit generates a relay control signal when the current value, voltage value, and duration of the preset pulse signal all reach preset values. The relay is coupled between the fuse simulation circuit and the downstream circuit, and interrupts the power supply path to the downstream circuit by closing it according to the relay control signal.

Claims

1. A fuse simulation system for an electric vehicle, the electric vehicle including a power management system and a back-end circuit, wherein the power management system generates a preset pulse signal based on at least one of a plurality of simulated trigger events, the fuse simulation system comprising: a fuse simulation circuit coupled to the power management system and including: a current detection unit configured to detect a current value of the preset pulse signal; a voltage detection unit configured to detect a voltage value of the preset pulse signal; a pulse width detection unit configured to detect a duration of the preset pulse signal; and a relay control unit configured to generate a relay control signal in response to the current value reaching a preset current value, the voltage value reaching a preset voltage value, and the duration reaching a preset pulse width value; and a relay coupled between the fuse simulation circuit and the back-end circuit, and configured to switch from being on to being off based on the relay control signal, thereby interrupting the power supply path of the back-end circuit.

2. The fuse simulation system as described in claim 1 further comprises: a programmable computer coupled to the power management system and configured to: set conditions and parameters corresponding to the occurrence of the simulated trigger events to control the power management system to generate the preset pulse signal when the parameters and conditions are met; determine whether the current value reaches the preset current value, whether the voltage value reaches the preset voltage value, and whether the duration reaches the preset pulse width value; and generate a control signal corresponding to the current value reaching the preset current value, the voltage value reaching the preset voltage value, and the duration reaching the preset pulse width value.

3. The fuse simulation system as described in claim 2 further includes: a data acquisition device coupled between the programmable computer and the fuse simulation circuit, wherein the input terminal of the data acquisition device is configured to transmit a current detection value of the current detection unit, a voltage detection value of the voltage detection unit and a duration detection value of the pulse width detection unit to the programmable computer, and the output terminal of the data acquisition device is configured to transmit the control signal to the relay control unit to generate the relay control signal.

4. The fuse simulation system as described in claim 1 further includes: a reset switch coupled to the fuse simulation circuit and configured to reset the current detection unit, the voltage detection unit, the pulse width detection unit and the relay control unit to an initial state.

5. The fuse simulation system as described in claim 1, wherein the simulated triggering events include collision of the electric vehicle, overvoltage, overcurrent, short circuit, and relay sticking in the back-end circuit.

6. The fuse simulation system as claimed in claim 1, wherein the back-end circuit is a power distribution unit comprising a plurality of control relays, and the specifications of the relays in the fuse simulation system are the same as those of the control relays.

7. The fuse simulation system as described in claim 1, wherein the pulse width detection unit is further configured to detect a waveform of the preset pulse signal, causing the relay control unit to generate the relay control signal in response to the current value reaching the preset current value, the voltage value reaching the preset voltage value, the duration reaching the preset pulse width value, and the waveform conforming to a preset waveform.

8. The fuse simulation system as described in claim 1, wherein the preset current value, the preset voltage value, and the preset pulse width value are each set to a fixed threshold.

9. The fuse simulation system as described in claim 1, wherein the preset current value, the preset voltage value, and the preset pulse width value are each set to a numerical range.

10. A fuse simulation method for an electric vehicle, wherein the electric vehicle includes a power management system, a fuse simulation system, and a back-end circuit, the fuse simulation system being coupled between the power management system and the back-end circuit and including a relay, the fuse simulation method comprising: triggering the power management system to generate a preset pulse signal based on at least one of a plurality of simulated trigger events; detecting a current value of the preset pulse signal; detecting a voltage value of the preset pulse signal; detecting a duration of the preset pulse signal; and when the current value reaches a preset current value, the voltage value reaches a preset voltage value, and the duration reaches a preset pulse width value, closing the relay to interrupt the power supply path of the back-end circuit.

11. The fuse simulation method as described in claim 10, wherein the simulated triggering events include a collision of the electric vehicle, overvoltage, overcurrent, short circuit, and relay sticking in the back-end circuit.

12. The fuse simulation method as described in claim 10, wherein the back-end circuit is a power distribution unit comprising a plurality of control relays, and the specifications of the relays in the fuse simulation system are the same as those of the control relays.

13. The fuse simulation method as described in claim 10 further includes: detecting a waveform of the preset pulse signal; and closing the relay to interrupt the power supply path of the back-end circuit when the current value reaches the preset current value, the voltage value reaches the preset voltage value, the duration reaches the preset pulse width value, and the waveform conforms to a preset waveform.

14. The fuse simulation method as described in claim 10, wherein the preset current value, the preset voltage value, and the preset pulse width value are each set to a fixed threshold.

15. The fuse simulation method as described in claim 10, wherein the preset current value, the preset voltage value, and the preset pulse width value are each set to a numerical range.

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