CN105680509B - Fill electric pile with outage processing function - Google Patents

Abstract

The invention relates to a charging pile, in particular to a charging pile with a power-off processing function, which comprises a power supply module and a charging gun port, wherein the power supply module is used for charging a battery pack of an electric vehicle through the charging gun port after power supply input is converted; the charging gun comprises a control system and an auxiliary power supply for supplying power to the control system, wherein the auxiliary power supply is used for supplying power from a charging gun port. In the charging process, when the power input is powered off, the auxiliary power supply can supply power to the control system to ensure that the control system can continue to work because the auxiliary power supply gets power from a battery pack of the electric vehicle through the charging gun port.

Description

Charging pile with power failure processing function

technical field

The invention relates to a charging pile, in particular to a charging pile with a power-off processing function.

Background technique

When the electric vehicle is to be charged, the charging cable needs to be inserted into the charging port of the electric vehicle. When the control system of the charger confirms that the electric vehicle is connected, and the user completes the setting of charging power and payment through the human-computer interface, the control system of the charger will open the electronic lock and lock the charging port of the charger and the electric vehicle. To avoid the charging gun falling off during charging. When the charging is completed, the control system of the charger unlocks the electronic lock, and the user can normally pull out the charging gun after unlocking.

The auxiliary power supply supplies power to the control system of the charger after taking power from the power input. When the power input is cut off for some reason, the auxiliary power supply will also stop working, and the control system of the charger will also be shut down. This will cause several problems: 1. The electronic lock cannot be unlocked normally and the charging gun cannot be pulled out from the charging port of the electric vehicle; 2. The electronic lock may be automatically disconnected and the charging gun may fall off accidentally, which may cause the charging gun port to be dangerous The voltage has not been released, resulting in electric shock accidents; 3. The payment system cannot complete the payment normally or cause information loss.

Contents of the invention

In order to make the charging pile have the power-off processing function, a charging pile with power-off processing function is provided, which includes a power supply module and a charging gun port. The power supply module converts the power input and charges the battery pack of the electric vehicle through the charging gun port. ; including a control system and an auxiliary power supply for taking power to the control system, the auxiliary power supply takes power from the port of the charging gun, and two sets of charging output switches are connected between the output end of the power module and the port of the charging gun, The power-taking point where the auxiliary power source gets power from the battery pack of the electric vehicle is located between the two sets of charging output switches. The charging output switch between the point and the charging gun port is closed. During the charging process, when the power input is cut off, because the auxiliary power supply takes power from the battery pack of the electric vehicle through the charging gun port, the auxiliary power supply can also supply power to the control system to ensure the control The system can continue to work.

The control system controls the on-off of the charging output switch. The control system is connected with a power-off monitoring device for monitoring whether the power input is powered off. During the charging process, if the power-off monitoring device detects that the power input is powered off, the control system disconnects the connection between the power-taking point and the power module. The charging output switch between the output terminals. The power failure monitoring device includes a voltage detection circuit and a frequency detection circuit, the voltage detection circuit is used to detect the voltage value of the power input, and the frequency detection circuit is used to detect the frequency of the power input. During the charging process, the power failure monitoring device can monitor the voltage and frequency of the power input at all times, and if the power failure monitoring device detects that the power input is powered off, the control system disconnects the charging output switch to prevent The current of the battery pack is fed back to the power module.

The charging pile includes an electronic lock powered by the auxiliary power supply and a payment system, the control system controls the opening or closing of the electronic lock, and the control system controls the payment system. When the power input is cut off, the auxiliary power supply also supplies power to the control system, the electronic lock and the payment system, so that the electronic lock can be unlocked normally, so that the charging gun can be pulled out from the charging port of the electric vehicle, which also prevents The phenomenon that the electronic lock is automatically disconnected and the charging gun falls off accidentally. The payment system can still work normally, so that the situation of failure to pay normally or loss of information will not occur. After the payment system completes the payment, the control system notifies the electric vehicle to disconnect the charging gun port from the battery pack. At this time, the battery pack of the electric vehicle no longer supplies power to the auxiliary power supply, so the dangerous voltage at the port of the charging gun is quickly discharged through the auxiliary power supply, which makes the voltage at the port of the charging gun drop rapidly, thereby avoiding the occurrence of Electric shock accident.

The auxiliary power supply also draws power from the power input. A transformer T1 is connected between the power input and the auxiliary power supply. The transformer T1 is used to transform the input voltage of the power supply and output it to the auxiliary power supply.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

Fig. 1 is a circuit connection schematic diagram of a charging pile with a power-off processing function according to the present invention.

Detailed ways

As shown in Figure 1, the input end of the power module is connected to the power input, and its output end is connected to the controllable switches K1 and K2 in parallel with the port of the charging gun. The auxiliary power supply has two power-taking terminals, one of which is connected to the power supply input through the transformer T1, and the other power-taking terminal is connected to the port of the charging gun. The output terminals of the auxiliary power supply are respectively connected to the control system, the payment system and the electronic lock of the charging pile to supply power for the control system, the payment system and the electronic lock of the charging pile. The control system controls the payment system. The control system is connected with a power failure monitoring device for monitoring whether the power input is powered off, wherein the power failure monitoring device includes a voltage detection circuit and a frequency detection circuit, the voltage detection circuit is used to detect the voltage value of the power input, and the frequency detection circuit is used to detect The frequency of the power input. Controllable switches K3 and K4 are connected in parallel between the charging port of the electric vehicle and the battery pack, and the battery management system BMS of the electric vehicle controls the on-off of the controllable switches K3 and K4.

During the charging process, the controllable switches K1, K2, K3, and K4 are all closed. If the power failure monitoring device detects that the power input is cut off, on the one hand, the control system disconnects the controllable switches K1, K2, so that the power module and the charging gun The port is disconnected to prevent the current of the battery pack from being fed back to the power module, thereby avoiding damage to the power module; on the other hand, since the controllable switches K3 and K4 are still in the closed state, the auxiliary power supply takes power from the battery pack of the electric vehicle, thereby The auxiliary power supply can also supply power to the control system, so that the control system can still work normally, then the voice prompts the user that the power input has been cut off, and reminds the user to pay immediately, and the completed charging status is displayed through the man-machine exchange interface, and relevant information Stored in the memory in the charging station.

If the user completes the payment within the specified time, the control system will disconnect the electronic lock and notify the battery management system BMS of the electric vehicle to disconnect the controllable switches K3 and K4. When the controllable switches K3 and K4 are disconnected, the dangerous voltages on the DC+ and DC- ports of the charging gun are quickly discharged through the auxiliary power supply, and the voltage at the charging gun port drops rapidly, thereby avoiding electric shock accidents.

If the user fails to complete the payment within the specified time, the control system will save the user information and payment information, and upload the relevant information to the comprehensive control system of the charging station in time, so as to avoid the situation of failure to pay normally or information loss. Then the control system disconnects the electronic lock and notifies the battery management system BMS of the electric vehicle to disconnect the controllable switches K3 and K4. When the user picks up the car, the payment can be completed through the integrated control system of the charging station. The comprehensive control system of the charging station is equipped with a backup power supply, which has the functions of information storage and comprehensive payment.

Claims (8)

1. A charging pile with a power-off processing function, including a power supply module and a charging gun port. The power supply module charges the battery pack of the electric vehicle through the charging gun port after converting the power input; it includes the control system and the control system for power supply The auxiliary power supply of the system is characterized in that the auxiliary power supply takes power from the charging gun port, two sets of charging output switches are connected between the output end of the power module and the charging gun port, and the auxiliary power supply is from the battery of the electric vehicle The power-taking point of the package is located between these two sets of charging output switches. When the power input is cut off, the charging output switch between the power-taking point and the output terminal of the power module is disconnected, and the charging point between the power-taking point and the port of the charging gun is disconnected. The charging output switch is closed. 2 . The charging pile with power-off processing function according to claim 1 , wherein the control system controls the on-off of the charging output switch. 3 . 3. The charging pile with power failure processing function according to claim 2, characterized in that the control system is connected with a power failure monitoring device for monitoring whether the power input is powered off, and during the charging process, the power failure When the monitoring device detects that the power input is powered off, the control system turns off the charging output switch between the power-taking point and the output terminal of the power module. 4. The charging pile with power-off processing function according to claim 3, characterized in that, the power-off monitoring device includes a voltage detection circuit and a frequency detection circuit, and the voltage detection circuit is used to detect the voltage value of the power input , the frequency detection circuit is used to detect the frequency of the power input. 5. The charging pile with power failure processing function according to claim 1, characterized in that it includes an electronic lock powered by the auxiliary power supply and a payment system, the control system controls the opening or closing of the electronic lock, The control system controls the payment system. 6. The charging pile with power-off processing function according to claim 5, characterized in that, after the payment system completes the payment, the control system notifies the electric vehicle to disconnect the connection between the charging gun port and the battery pack. connect. 7. The charging pile with a power failure processing function according to claim 1, wherein the auxiliary power supply also takes power from the power input. 8. The charging pile with power-off processing function according to claim 7, characterized in that a transformer T1 is connected between the power input and the auxiliary power supply.