Charging and discharging method of mobile charging pile

Abstract

The invention relates to the technical field of charging piles, in particular to a charging and discharging method of a mobile charging pile. The charging and discharging method comprises the following steps. Order information of a user is acquired; acquiring the GPS positioning of the user and driving to the GPS positioning; judging whether the charging gun is connected; the VCU outputs a discharge wake-up signal; bMS discharge preparation is carried out; the BMS closes the negative relay, and the VCU sends a high-voltage instruction to the CCU; the CCU closes a pre-charging relay; judging whether pre-charging is completed or not; the BMS closes the positive discharge relay; the VCU sends a charging starting instruction to the CCU; the CCU disconnects the pre-charger; the VCU sends a charging gun locking signal to the CCU; judging whether the electronic lock is locked or not; the CCU controls to close the relay K1 and the relay K2; the DC-DC works; charging is started; therefore, the charging requirement of the vehicle can be well met.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a charging and discharging method of a mobile charging pile. Background Art

[0002] At present, as new energy vehicles become more and more popular, the charging demand of new energy vehicles also needs to be urgently addressed; for example, charging piles are arranged at parking spaces. When new energy vehicles need to be charged, they can park at the parking spaces, connect the discharge connector of the charging pile to the charging port of the new energy vehicle, and then the charging pile charges the new energy vehicle;

[0003] Since the number of parking spaces is limited, and the number of parking spaces that can be equipped with charging piles is also limited, when faced with the charging needs of many new energy vehicles, the limited number of charging piles cannot meet the charging needs of many new energy vehicles. Summary of the invention

[0004] In view of the defect that existing charging piles in the prior art cannot meet the charging needs of many new energy vehicles, the present invention provides a charging and discharging method of a mobile charging pile.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A charging and discharging method for a mobile charging pile, the charging and discharging method comprising the following steps;

[0007] Step S1, obtaining the user's order information;

[0008] Step S2, obtaining the user's GPS location and driving to the GPS location;

[0009] Step S3, determine whether the charging gun is connected; if so, proceed to the next step; otherwise, return to step S2;

[0010] Step S4, VCU outputs a discharge wake-up signal;

[0011] Step S5, BMS discharge preparation;

[0012] Step S6: BMS closes the negative relay, and VCU sends a high voltage command to CCU;

[0013] Step S7, CCU closes the pre-charge relay;

[0014] Step S8, determine whether the pre-charging is completed; if so, proceed to the next step; if not, return to step S7;

[0015] Step S9, BMS closes the positive relay;

[0016] Step S10: VCU sends a charging start instruction to CCU;

[0017] Step S11, CCU disconnects the pre-charger;

[0018] Step S12: VCU sends a charging gun locking signal to CCU;

[0019] Step S13, determine whether the electronic lock is locked; if so, proceed to the next step; if not, return to step S12;

[0020] Step S14, CCU controls to close the K1 relay and the K2 relay;

[0021] Step S15, DC-DC working;

[0022] Step S16, start charging;

[0023] Among them, BMS: battery management system; VCU: vehicle control unit; CCU: discharge controller.

[0024] In the present invention, the user places an order, clicks on the location of the vehicle to be charged on the map, and the charging pile automatically drives to the vicinity of the vehicle. The user unplugs the charging gun, directly inserts the charging gun into the charging socket, and clicks to start charging after confirming that the connection is successful. CCU transmits the charging gun connection success status signal to VCU. After receiving the signal, VCU sends the discharge wake-up signal to BMS through hard wire. After detecting the discharge wake-up signal, BMS prepares for discharge. First, it closes the negative discharge relay and feeds back the closed state of the negative discharge relay to VCU. After receiving the closed state signal of the negative discharge relay, VCU sends a high-voltage instruction to CCU. After receiving the instruction, CCU closes the pre-charge relay and feeds back the pre-charge completion signal to BMS. After receiving the pre-charge completion signal, BMS closes the positive discharge relay and sends the closed state signal of the positive discharge relay to VCU. After receiving this signal, VCU sends a start charging instruction to CCU, and CCU disconnects the pre-charge relay. At the same time, VCU synchronously sends a locking signal to CCU, and CCU locks the electronic lock of the charging gun. Then CCU controls the closing of K1 and K2 relays. DC-DC adjusts the charging voltage, current, power and other parameters in real time according to the GB / T 27930 protocol communication to carry out the charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a flow chart of the charging and discharging method in Example 1;

[0026] Figure 2 This is a circuit diagram of the charging and discharging method in Example 1. DETAILED DESCRIPTION

[0027] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0028] Example 1

[0029] like Figure 1-2 As shown, this embodiment provides a charging and discharging method for a mobile charging pile, and the charging and discharging method includes the following steps:

[0030] Step S1, obtaining the user's order information;

[0031] Step S2, obtaining the user's GPS location and driving to the GPS location;

[0032] Step S3, determine whether the charging gun is connected; if so, proceed to the next step; otherwise, return to step S2;

[0033] Step S4, VCU outputs a discharge wake-up signal;

[0034] Step S5, BMS discharge preparation;

[0035] Step S6: BMS closes the negative relay, and VCU sends a high voltage command to CCU;

[0036] Step S7, CCU closes the pre-charge relay;

[0037] Step S8, determine whether the pre-charging is completed; if so, proceed to the next step; if not, return to step S7;

[0038] Step S9, BMS closes the positive relay;

[0039] Step S10: VCU sends a charging start instruction to CCU;

[0040] Step S11, CCU disconnects the pre-charger;

[0041] Step S12: VCU sends a charging gun locking signal to CCU;

[0042] Step S13, determine whether the electronic lock is locked; if so, proceed to the next step; if not, return to step S12;

[0043] Step S14, CCU controls to close the K1 relay and the K2 relay;

[0044] Step S15, DC-DC working;

[0045] Step S16, start charging;

[0046] Among them, BMS: battery management system; VCU: vehicle control unit; CCU: discharge controller.

[0047] In this embodiment, the user places an order, clicks on the location of the vehicle to be charged on the map, and the charging pile will automatically drive to the vicinity of the vehicle. The user unplugs the charging gun and directly inserts the charging gun into the charging socket. After confirming that the connection is successful, click to start charging. CCU transmits the charging gun connection success status signal to VCU. After receiving the signal, VCU sends the discharge wake-up signal to BMS through hard wire. After detecting the discharge wake-up signal, BMS prepares for discharge. First, it closes the negative discharge relay and feeds back the closed state of the negative discharge relay to VCU. After receiving the closed state signal of the negative discharge relay, VCU sends a high-voltage instruction to CCU. After receiving the instruction, CCU closes the pre-charge relay and feeds back the pre-charge completion signal to BMS. After receiving the pre-charge completion signal, BMS closes the positive discharge relay and sends the closed state signal of the positive discharge relay to VCU. After receiving this signal, VCU sends a start charging instruction to CCU, and CCU disconnects the pre-charge relay. At the same time, VCU synchronously sends a locking signal to CCU, and CCU locks the electronic lock of the charging gun. Then CCU controls the closing of K1 and K2 relays. DC-DC adjusts the charging voltage, current, power and other parameters in real time according to the GB / T 27930 protocol communication to carry out the charging process.

[0048] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A charging and discharging method for a mobile charging pile, characterized in that: The charging and discharging method comprises the following steps: Step S1, obtaining the user's order information; Step S2, obtaining the user's GPS location and driving to the GPS location; Step S3, determine whether the charging gun is connected; if so, proceed to the next step; otherwise, return to step S2; Step S4, VCU outputs a power generation wake-up signal; Step S5, BMS discharge preparation; Step S6: BMS closes the negative relay, and VCU sends a high voltage command to CCU; Step S7, CCU closes the pre-charge relay; Step S8, determine whether the pre-charging is completed; if so, proceed to the next step; if not, return to step S7; Step S9, BMS closes the positive relay; Step S10: VCU sends a charging start instruction to CCU; Step S11, CCU disconnects the pre-charger; Step S12: VCU sends a charging gun locking signal to CCU; Step S13, determine whether the electronic lock is locked; if so, proceed to the next step; if not, return to step S12; Step S14, CCU controls to close the K1 relay and the K2 relay; Step S15, DC-DC working; Step S16, start charging; Among them, BMS: battery management system; VCU: vehicle control unit; CCU: discharge controller.

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