CN-117841761-B - Charging and discharging control guide generation method and system

CN117841761BCN 117841761 BCN117841761 BCN 117841761BCN-117841761-B

Abstract

The invention discloses a charge and discharge control guide generation method and a system. The method comprises the steps of receiving a first pulse width modulation signal sent by a charging pile by a signal receiving end, performing high-low level change on the first pulse width modulation signal according to a preset duty ratio, performing signal conversion on the first pulse width modulation signal by a non-current trigger control circuit to obtain a second pulse width modulation signal, detecting whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with the preset signal amplitude range or not by a signal detection module, and determining that the interaction between the vehicle end and the charging pile is completed under the condition that the second pulse width modulation signal is matched with the preset signal amplitude range. The invention solves the technical problems that waveform generated by adopting current triggering control current in the related technology is not ideal, which is unfavorable for collecting and judging waveforms of the pile end and the car end.

Inventors

LIANG XINLONG
CHENG LIFA

Assignees

宁波公牛新能源科技有限公司

Dates

Publication Date: 20260508
Application Date: 20240103

Claims (11)

1. The charge and discharge control guide generation method is characterized by comprising the following steps of: a signal receiving end is adopted to receive a first pulse width modulation signal sent by a charging pile, wherein the first pulse width modulation signal is a voltage signal, and the high-low level change is carried out according to a preset duty ratio; Performing signal conversion on the first pulse width modulation signal by adopting a non-current trigger control circuit to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal; detecting whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with a preset signal amplitude range or not by adopting a signal detection module, and determining that the interaction between a vehicle end and the charging pile is completed under the condition that the second pulse width modulation signal is matched with the preset signal amplitude range; The non-current trigger control circuit is used for generating the second pulse width modulation signal by adopting a voltage trigger control device, and comprises a signal amplifying circuit, a high-level output circuit and a low-level output circuit, wherein the non-current trigger control circuit is used for carrying out signal conversion on the first pulse width modulation signal to obtain the second pulse width modulation signal, and the non-current trigger control circuit comprises the steps of amplifying the first pulse width modulation signal by adopting the signal amplifying circuit to generate a voltage control signal; The signal amplifying circuit comprises a first amplifying circuit, the first amplifying circuit comprises a first metal oxide semiconductor field effect MOS tube, the high-level output circuit comprises a second MOS tube, the first MOS tube and the second MOS tube are respectively the voltage trigger control devices, the high-level output circuit is used for outputting high-level signals in the second pulse width modulation signals to the signal detection module based on the voltage control signals, the high-level signals comprise that the first MOS tube is used for controlling the first drain electrode of the first MOS tube and the first source electrode of the first MOS tube to be conducted under the condition that the first pulse width modulation signals are high level, the first control signals enable the second gate electrode of the second MOS tube to trigger a conducting state, the first MOS tube is used for controlling the first drain electrode to be conducted under the condition that the first pulse width modulation signals are low in level, the second MOS tube is used for controlling the second drain electrode to be conducted under the condition that the second MOS tube is high-level, the second MOS tube is used for enabling the second MOS tube to trigger a conducting state to be conducted under the condition that the second MOS tube is high in the second MOS tube is conducted under the condition that the second MOS tube is high-level, and the second MOS tube is used for triggering the second gate electrode is used for triggering a high-level signal, and the second MOS tube is used for enabling the second gate electrode to be conducted under the condition that the second MOS tube is conducted under the condition.
2. The method of claim 1, wherein the signal amplifying circuit includes a second amplifying circuit, the second amplifying circuit includes a third MOS transistor, the low-level output circuit includes a fourth MOS transistor, the third MOS transistor and the fourth MOS transistor are respectively the voltage trigger control devices, the outputting, by the low-level output circuit, the low-level signal in the second pulse width modulation signal to the signal detection module based on the voltage control signal includes: The third MOS transistor is adopted to control conduction between a third drain electrode of the third MOS transistor and a third source electrode of the third MOS transistor under the condition that the first pulse width modulation signal is in a low level, and a third control signal in the voltage control signal is generated, wherein the third control signal enables a fourth grid electrode of each fourth MOS transistor to trigger a conduction state; When the first pulse width modulation signal is at a high level, the third MOS transistor is adopted to control the cut-off between the third drain electrode and the third source electrode by the third grid electrode, and a fourth control signal in the voltage control signal is generated, wherein the fourth control signal enables the fourth grid electrode to trigger a cut-off state; And under the condition that the fourth MOS tube is in a fourth grid trigger conduction state, a fourth drain electrode of the fourth MOS tube is conducted with a fourth source electrode of the fourth MOS tube, and a system low level provided by the vehicle end is output to the signal detection module through the fourth source electrode to serve as a low level signal in the second pulse width modulation signal.
3. The method of claim 1, wherein the non-current-triggered control circuit generates the second pulse width modulated signal using a voltage-isolated switch chip and a differential operational amplifier, and the signal converting the first pulse width modulated signal using the non-current-triggered control circuit to obtain the second pulse width modulated signal comprises: Receiving the first pulse width modulation signal by adopting a chip input end of the voltage isolating switch chip, and converting the first pulse width modulation signal into a preset differential amplitude range to obtain a first differential signal; The first differential signal is input to the signal positive input end of the differential operational amplifier by adopting the chip output end of the voltage isolating switch chip; The differential operational amplifier is used for generating the second pulse width modulation signal based on the first differential signal and a second differential signal input into the differential operational amplifier by a preset second low-level power supply.
4. A charge-discharge control guidance generating system is characterized by being applied to a vehicle end and comprising a signal receiving end, a non-current trigger control circuit and a signal detection module of the vehicle end, The signal receiving end is used for receiving a first pulse width modulation signal sent by the charging pile and inputting the first pulse width modulation signal into the non-current trigger control circuit, wherein the first pulse width modulation signal is a voltage signal and changes in high and low levels according to a preset duty ratio; The non-current trigger control circuit is used for performing signal conversion on the first pulse width modulation signal to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal; the signal detection module is used for detecting whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with a preset signal amplitude range or not, and determining that the vehicle end and the charging pile are interacted and completed under the condition that the second pulse width modulation signal is matched with the preset signal amplitude range; the non-current trigger control circuit is used for generating the second pulse width modulation signal by adopting a voltage trigger control device and comprises a signal amplifying circuit, a high-level output circuit and a low-level output circuit, wherein one end of the signal amplifying circuit is connected with the signal receiving end, the other end of the signal amplifying circuit is respectively connected with the high-level output circuit and the low-level output circuit, the signal amplifying circuit is used for amplifying the first pulse width modulation signal to generate a voltage control signal, the high-level output circuit is connected with the signal detection module and used for outputting a high-level signal in the second pulse width modulation signal to the signal detection module based on the voltage control signal, and the low-level output circuit is connected with the signal detection module and used for outputting a low-level signal in the second pulse width modulation signal to the signal detection module based on the voltage control signal; The signal amplifying circuit comprises a first amplifying circuit, wherein the first amplifying circuit comprises a first metal oxide semiconductor field effect MOS tube, the high-level output circuit comprises a second MOS tube, the first MOS tube and the second MOS tube are respectively the voltage trigger control devices, a first grid electrode of the first MOS tube is connected with the signal receiving end, a first drain electrode of the first MOS tube is connected with a system high level provided by the vehicle end, a first source electrode of the first MOS tube is connected with a system ground provided by the vehicle end, a second grid electrode of the second MOS tube is connected with the first drain electrode, a second source electrode of the second MOS tube is connected with the system high level, a second drain electrode of the second MOS tube is connected with the signal detection module, the first MOS tube is used for controlling the connection between the first drain electrode and the first source electrode under the condition that a first pulse width modulation signal is at a high level, a first control signal is generated by the first grid electrode, the first grid electrode is connected with the system high level, the second MOS tube is used for controlling the connection between the first drain electrode and the first drain electrode, the second MOS tube is used for triggering the signal under the condition that the second grid electrode is at the high level, and the second MOS tube is triggered under the condition that the second control signal is at the high level, and the second grid electrode is triggered by the high level, and the second MOS tube is connected with the second control signal is triggered to be at the high level, and the second drain electrode is enabled to be at the condition, and the high level.
5. The system of claim 4, wherein the non-current triggered control circuit comprises a first switching bleeder circuit comprising a first bleeder resistor and a first bleeder diode, the first bleeder resistor and the first bleeder diode being connected in parallel, the first bleeder diode having an anode connected to the first drain and a cathode connected to the second gate, wherein, The first switch bleeder circuit is used for performing voltage bleeder through the first switch bleeder circuit under the condition that the on or off state of the first drain electrode and the first source electrode is changed.
6. The system of claim 4, wherein the signal amplifying circuit comprises a second amplifying circuit comprising a third MOS transistor, the low-level output circuit comprising a fourth MOS transistor, the third MOS transistor and the fourth MOS transistor being voltage-triggered control devices, respectively, wherein, The third grid electrode of the third MOS tube is connected with the signal receiving end, the third drain electrode of the third MOS tube is connected with the system low level provided by the vehicle end, and the third source electrode of the third MOS tube is connected with the preset first low level power supply provided by the vehicle end, wherein the preset first low level power supply is higher than the system low level; the fourth grid electrode of the fourth MOS tube is connected with the third drain electrode, the fourth source electrode of the fourth MOS tube is connected with the system low level, and the fourth drain electrode of the fourth MOS tube is connected with the signal detection module; The third MOS transistor is configured to control, when the first pulse width modulation signal is at a low level, conduction between the third drain and the third source by the third gate, and generate a third control signal in the voltage control signal, where the third control signal causes the fourth gate to trigger a conduction state; when the first pulse width modulation signal is in a high level, the third grid electrode controls the third drain electrode and the third source electrode to be cut off, and a fourth control signal in the voltage control signals is generated, and the fourth control signal enables the fourth grid electrode to trigger a cut-off state; The fourth MOS transistor is configured to, when the fourth gate triggers the on state, enable the fourth drain to be on with the fourth source, and output, by using the fourth source pair, the system low level to the signal detection module as the low level signal in the second pulse width modulation signal.
7. The system of claim 6, wherein the non-current triggered control circuit comprises a second switching bleeder circuit comprising a second bleeder resistor and a second bleeder diode, the second bleeder resistor and the second bleeder diode being connected in parallel, the second bleeder diode having an anode connected to the fourth gate and a cathode connected to the third drain, wherein, The second switch bleeder circuit is used for performing voltage bleeder through the second switch bleeder circuit under the condition that the on or off state of the third drain electrode and the third source electrode is changed.
8. The system of claim 4, wherein the non-current triggered control circuit comprises a clamp diode and a feed-through filter, the clamp diode comprising three terminals, a first terminal of the clamp diode being connected to an input terminal of the feed-through filter, a second terminal of the clamp diode being connected to a system high level provided by the vehicle terminal, a third terminal of the clamp diode being connected to a system low level provided by the vehicle terminal, an output terminal of the feed-through filter being connected to the signal detection module, The clamping diode is used for keeping the second pulse width modulation signal in a range between the high level of the system and the low level of the system; The feed-through filter is used for filtering signals which are not matched with the preset frequency and are included in the second pulse width modulation signals.
9. The system of claim 8, wherein the non-current triggered control circuit comprises a transient voltage suppression TVS diode having one end connected to an output of the feedthrough filter and the other end connected to a system ground provided by the vehicle end, wherein, The TVS diode is used for discharging the pulse signals included in the second pulse width modulation signal.
10. The system of claim 4, wherein the non-current trigger control circuit is configured to generate the second pulse width modulated signal using a voltage isolation switch chip and a differential operational amplifier, wherein an output terminal of the voltage isolation switch chip is connected to a signal positive input terminal of the differential operational amplifier, a signal negative input terminal of the differential operational amplifier is connected to a predetermined second low level power supply, and a signal output terminal of the differential operational amplifier is connected to the signal detection module, The voltage isolating switch chip is used for receiving the first pulse width modulation signal by adopting a chip input end and converting the first pulse width modulation signal into a preset differential amplitude range to obtain a first differential signal; The differential operational amplifier is configured to generate the second pulse width modulation signal based on the first differential signal and a second differential signal input by the predetermined second low-level power supply.
11. The system of claim 10, wherein the non-current triggered control circuit comprises a first feedback resistor, a second feedback resistor, a third feedback resistor, and a fourth feedback resistor, wherein the chip output is connected to one end of the first feedback resistor, the other end of the first feedback resistor is connected to the positive signal input, one end of the second feedback resistor is connected to the positive signal input, the other end of the second feedback resistor is connected to the system ground provided by the vehicle terminal, one end of the third feedback resistor is connected to the predetermined second low level power supply, the other end of the third feedback resistor is connected to the negative signal input, one end of the fourth feedback resistor is connected to the negative signal input, the other end of the fourth feedback resistor is connected to the output signal, the first feedback resistor is matched to the resistance of the third feedback resistor, the second feedback resistor is matched to the resistance of the fourth feedback resistor, the positive power supply input of the differential operational amplifier is connected to the high level differential amplifier and the system ground provided by the vehicle terminal.

Description

Charging and discharging control guide generation method and system Technical Field The invention relates to the technical field of charge and discharge, in particular to a charge and discharge control guide generation method and system. Background In the ac charging device, the CP signal is called a control guidance function signal (Control Pilot Function) mainly for monitoring an interactive function between the electric vehicle and the electric vehicle power supply device (i.e., the charging pile). The control pilot signal of an ac charging device typically uses a PWM signal source of 1kHz (kilohertz) and its duty cycle to express the maximum supply current Imax that the present device can provide. The CP control pilot signal plays a key role in the alternating current charging pile, and can effectively monitor and control the charging process, so that the charging safety and efficiency are ensured. In the related art, the rising edge and the falling edge of the CP control pilot signal generated by the current trigger control circuit are longer in time, so that the waveform anti-interference capability is poor, the finally generated PWM signal is inaccurate, and the acquisition and judgment of waveforms at the pile end and the car end are not facilitated. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a charge-discharge control guide generation method and a system, which at least solve the technical problems that waveforms generated by adopting current triggering control current in the related technology are not ideal, so that the acquisition and judgment of waveforms at a pile end and a car end are not facilitated. According to one aspect of the embodiment of the invention, a charge-discharge control guidance generation method is provided, which comprises the steps of receiving a first pulse width modulation signal sent by a charge pile by a signal receiving end, wherein the first pulse width modulation signal is a voltage signal, carrying out high-low level change according to a preset duty ratio, carrying out signal conversion on the first pulse width modulation signal by a non-current trigger control circuit to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal, detecting whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with the preset signal amplitude range by a signal detection module, and determining that interaction between a vehicle end and the charge pile is completed under the condition that the second pulse width modulation signal is matched with the preset signal amplitude range. According to another aspect of the embodiment of the invention, a charge-discharge control guidance generating system is provided, and is applied to a vehicle end, and comprises a signal receiving end, a non-current trigger control circuit and a signal detection module of the vehicle end, wherein the signal receiving end is used for receiving a first pulse width modulation signal sent by a charging pile and inputting the first pulse width modulation signal into the non-current trigger control circuit, the first pulse width modulation signal is a voltage signal, the high-low level change is carried out according to a preset duty ratio, the non-current trigger control circuit is used for carrying out signal conversion on the first pulse width modulation signal to obtain a second pulse width modulation signal, the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal, and the signal detection module is used for detecting whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with a preset signal amplitude range or not, and determining that the vehicle end and the charging pile are interacted to be completed under the condition that the second pulse width modulation signal is matched with the preset signal amplitude range. In the embodiment of the invention, a first pulse width modulation signal sent by a charging pile is received by a signal receiving end, wherein the first pulse width modulation signal is a voltage signal, high and low level change is carried out according to a preset duty ratio, a non-current trigger control circuit is adopted to carry out signal conversion on the first pulse width modulation signal to obtain a second pulse width modulation signal, the voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal, a signal detection module is adopted to detect whether the second pulse width modulation signal output by the non-current trigger control circuit is matched with a preset