Vehicle-mounted charger control circuit and method, charger and electric vehicle
An on-board charger, electric vehicle technology, applied in electric vehicles, electric vehicle charging technology, battery circuit devices, etc., can solve the problems of harmonic pollution, poor versatility, poor scalability, etc. Zero current shutdown, solving the effects of poor generality and poor scalability
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Example Embodiment
[0056] Example 1:
[0057] Such as figure 1 As shown, Embodiment 1 of the present disclosure provides an on-board charger control circuit for electric vehicles, including a filter and rectifier module, a power factor correction module, a half-bridge LLC resonant converter module, and a main control module. The filter and rectifier module is used After filtering out the electromagnetic interference signal, the input AC signal is converted into a DC signal;
[0058] The power factor correction module is used to remove the harmonic components in the DC signal and output the DC voltage signal to the load through the half-bridge LLC resonant conversion module. The half-bridge LLC resonant conversion module is used to make the switch tube work in a zero voltage state. Realize the zero voltage turn-on when the charger is charging;
[0059] The main control module is used to collect the output voltage of the half-bridge LLC resonant conversion module in real time, and output a PWM control ...
Example Embodiment
[0092] Example 2:
[0093] Embodiment 2 of the present disclosure provides a control method of an on-board charger for electric vehicles, using the control circuit described in Embodiment 1 of the present disclosure, and the steps are as follows:
[0094] After the battery is connected to the charger, the voltage of the battery to be charged is detected to determine whether a period of protection charging is required to activate the reactive substance;
[0095] Collect various parameters of the battery and half-bridge LLC resonant converter module in real time, and control the half-bridge LLC resonant converter module according to the collected parameters to realize the conversion of constant current charging, constant voltage charging and trickle charging;
[0096] Further, the output voltage of the half-bridge LLC resonant conversion module is collected in real time, and the PWM control signal is output to the half-bridge LLC resonant conversion mode according to the collected output...
Example Embodiment
[0098] Example 3:
[0099] Embodiment 3 of the present disclosure provides an on-board charger for electric vehicles, including the on-board charger control circuit for electric vehicles described in the present disclosure.
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