A split charging pile and method capable of shortening the charging start time of an electric vehicle

Abstract

The application discloses a split charging pile capable of shortening the charging starting time of an electric vehicle, comprising a DC cabinet and a charging pile, characterized in that the DC cabinet comprises a charging module, a PDU control board, a pre-charging relay and a charging module main relay; the charging pile comprises a charging pile main control board, a DC relay and a charging gun connecting line interface. The application also discloses a method capable of shortening the charging starting time of an electric vehicle, comprising the following steps: S1, after the insulation detection phase is finished, the charging module keeps a constant voltage working mode; S2, the DC relay of the charging pile is turned off, the charging parameter configuration phase is entered, and the output voltage of the charging module is adjusted to reach the stable required voltage; and S3, the DC relay of the charging pile is turned on, the charging module is controlled to turn into a constant current charging mode, and the charging phase is entered. The method avoids the problem that the charging module is stopped, restarted and then outputted to the required voltage in the charging starting process, thereby increasing the charging starting time, and the charging APP can display the charging starting result more quickly.

Description

Technical Field

[0001] This invention relates to the field of charging technology, and in particular to a split-type charging pile and method that can shorten the charging start-up time of electric vehicles. Background Technology

[0002] With the increasing popularity of electric vehicles, the demand for electric vehicle charging stations is growing. After users scan the QR code on the charging station using an app to start charging, the app displays the charging start result. According to GB / T 27930-2015 "Communication Protocol between Off-board Conductive Charger and Battery Management System for Electric Vehicles", the general charging start process is as follows: physical connection completed, power-on, low-voltage auxiliary power matching, handshake identification stage, insulation detection completed, charging parameter configuration stage, and finally, entering the charging stage. After the insulation detection is completed, the charging module needs to be stopped to ensure that the voltage outside the DC relay is below 60V before the DC relay K1K2 of the charging station can be disconnected. Then, in the charging parameter configuration stage, the charging module needs to be restarted to enter the pre-charging stage. After the output voltage of the charging module reaches the stable required voltage, the DC relay K1K2 of the charging station is closed again to enter the charging stage.

[0003] The charging module needs time to go from shutdown to startup and then to a stable output voltage. Therefore, shortening the charging pile's startup time allows the app to display the charging start-up results faster, making the electric vehicle charging experience more comfortable and convenient for users. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to shorten the time of charging pile startup.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A split-type charging pile that can shorten the charging start-up time of electric vehicles includes a DC cabinet and a charging pile, characterized in that:

[0007] The DC cabinet includes a charging module, a PDU control board, and a charging module main relay;

[0008] The charging pile includes a DC relay;

[0009] The PDU control board is used to control the main relay of the charging module;

[0010] The output terminal of the charging module is connected to the input terminal of the main relay of the charging module; the output terminal of the main relay of the charging module is connected to the input terminal of the DC relay.

[0011] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0012] A method for shortening the charging start-up time of electric vehicles includes the following steps:

[0013] S1. After the insulation detection phase is completed, the charging module maintains a constant voltage operating mode.

[0014] S2. Disconnect the DC relay of the charging pile, enter the charging parameter configuration stage, and adjust the output voltage of the charging module to achieve a stable required voltage;

[0015] S3. Close the DC relay of the charging pile to control the charging module to switch to constant current charging mode and enter the charging stage.

[0016] The beneficial effects of this invention are as follows: After the insulation detection stage of starting charging, there is no need to stop the charging module. Instead, the voltage is directly adjusted to the required stable output voltage. The time consumed is five to six seconds less than the time from stopping to starting and then to the required stable output voltage. This avoids the problem of the charging module stopping and restarting and then to the required stable output voltage during the charging start-up process, which increases the charging start-up time. As a result, the charging APP displays the charging start-up result faster, and the user's operation is more sensitive and the experience is more comfortable after starting charging on the APP. Attached Figure Description

[0017] Figure 1 This is a device connection block diagram of a split-type charging pile that can shorten the charging start-up time of electric vehicles according to an embodiment of the present invention;

[0018] Figure 2 This is a flowchart of a method for shortening the charging start-up time of an electric vehicle according to an embodiment of the present invention;

[0019] Figure 3 This is a flowchart illustrating another method for shortening the charging start-up time of an electric vehicle according to an embodiment of the present invention. Detailed Implementation

[0020] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0021] Please refer to Figure 1 A split-type charging pile that can shorten the charging start-up time of electric vehicles, comprising a DC cabinet and a charging pile, characterized in that:

[0022] The DC cabinet includes a charging module, a PDU (Power Distribution Unit) control board, and a charging module main relay;

[0023] The charging pile includes a DC relay;

[0024] The PDU control board is used to control the main relay of the charging module;

[0025] The output terminal of the charging module is connected to the input terminal of the main relay of the charging module; the output terminal of the main relay of the charging module is connected to the input terminal of the DC relay.

[0026] As can be seen from the above description, the beneficial effects of the present invention are as follows: the PDU control board can control the main relay of the charging module to disconnect after the insulation detection stage of the charging start-up process, so as to omit the step of stopping the charging module before the parameter configuration stage, so that the state of the charging module does not affect the subsequent steps of the charging pile in the charging start-up process, and directly adjust the output voltage of the charging module to achieve the stable required voltage. After the parameter configuration stage is completed, the main relay of the charging module is controlled to close.

[0027] Furthermore, the DC cabinet also includes a pre-charge relay; the pre-charge relay is connected between the charging module and the PDU control board.

[0028] Furthermore, the charging pile also includes a main control board for controlling the DC relay.

[0029] Furthermore, the PDU control board establishes a communication connection with the charging module; the charging pile main control board communicates with other modules inside the charging pile and the BMS of the electric vehicle.

[0030] Furthermore, the charging pile also includes a charging gun connection cable interface; the PDU control board is communicatively connected to the main control board of the charging pile; and the output terminal of the DC relay is connected to the input terminal of the charging gun connection cable interface.

[0031] As described above, the DC voltage is generated by the charging module, transmitted to the DC relay through the main relay of the charging module, and then transmitted to the charging gun connection interface to realize the function of charging electric vehicles using the charging gun.

[0032] Please refer to Figure 2 A method for shortening the charging start-up time of electric vehicles includes the following steps:

[0033] S1. After the insulation detection phase is completed, the charging module maintains a constant voltage operating mode.

[0034] S2. Disconnect the DC relay of the charging pile, enter the charging parameter configuration stage, and adjust the output voltage of the charging module to achieve a stable required voltage;

[0035] S3. Close the DC relay of the charging pile to control the charging module to switch to constant current charging mode and enter the charging stage.

[0036] Furthermore, step S1 specifically involves: after the insulation detection phase is completed, disconnecting the main relay of the charging module, and maintaining the constant voltage operating mode of the charging module.

[0037] Furthermore, step S2 is followed by closing the main relay of the charging module.

[0038] As can be seen from the above description, the beneficial effect of the present invention is that after the insulation detection stage of starting charging, there is no need to stop the charging module. The voltage can be directly adjusted to the required stable output voltage, and the time consumed is five to six seconds less than the time from stopping to starting and then to the required stable output voltage.

[0039] Please refer to Figure 3 Optionally, step S1 specifically involves: after the insulation detection phase, adjusting the voltage output by the charging module to below the safe voltage, and maintaining the charging module in a constant voltage operating mode. The safe voltage is 60V.

[0040] The present invention provides a method for shortening the charging start-up time of electric vehicles and a split-type charging pile, which can shorten the charging start-up time of the charging pile. The following is a detailed description of the specific embodiments:

[0041] Example 1

[0042] Please refer to Figure 1 A split-type charging pile that can shorten the charging start-up time of electric vehicles includes a DC cabinet and a charging pile. The DC cabinet includes a charging module, a PDU control board, and a charging module main relay; the charging pile includes a DC relay; the DC cabinet also includes a pre-charge relay connected between the charging module and the PDU control board; the PDU control board controls the charging module main relay; and the charging pile also includes a charging pile main control board for controlling the DC relay. The charging pile and the charging module are isolated by the charging module main relay, thus eliminating the step of the charging module stopping after the insulation detection stage and needing to restart after the parameter configuration stage during the charging start-up process.

[0043] The output of the charging module is connected to the input of the main relay of the charging module; the output of the main relay is connected to the input of the DC relay. The charging pile also includes a charging gun connection interface, and the output of the DC relay is connected to the input of the charging gun connection interface. The DC voltage is generated by the charging module, transmitted through the main relay of the charging module to the DC relay, and then transmitted to the charging gun connection interface, enabling the charging gun to charge the electric vehicle.

[0044] The PDU control board establishes a communication connection with the charging module; the main control board of the charging pile communicates with other modules within the charging pile and the BMS of the electric vehicle; the PDU control board also communicates with the main control board of the charging pile. The main control board of the charging pile includes control module 1, which communicates bidirectionally with the PDU control board; control module 2, which communicates bidirectionally with other devices and modules within the charging pile; and control module 3, which communicates bidirectionally with the BMS of the electric vehicle. Additionally, the PDU control board of the charging module is responsible for bidirectional communication with the charging module in the DC cabinet, controlling the relays inside the DC cabinet, and bidirectional communication with the main control board of the charging pile. This enables communication between the charging module and the charging pile, as well as their respective control and communication with other devices.

[0045] Example 2

[0046] Please refer to Figure 2 This embodiment provides a method to shorten the charging start-up time of electric vehicles, applied to the split-type charging pile described in Embodiment 1, including the following steps:

[0047] S1. After the insulation test is completed, disconnect the main relay of the charging module and the charging module maintains constant voltage operation mode.

[0048] S2. Disconnect the DC relay of the charging pile and enter the charging parameter configuration stage. Adjust the output voltage of the charging module to achieve a stable required voltage.

[0049] Close the main relay of the charging module;

[0050] S3: Close the DC relay of the charging pile to control the charging module to switch to constant current charging mode and enter the charging stage.

[0051] Specifically, the electric vehicle and the charging station complete the physical connection, power on, and perform low-voltage auxiliary power matching before entering the handshake identification stage.

[0052] The charging pile sends a signal to start charging to the DC cabinet. The DC cabinet detects whether the charging module is powered on and closes the pre-charge relay to power on the charging module.

[0053] After the charging module is powered on, wait for the output voltage of the charging module to rise. If the required output voltage is not reached within the preset time, an error message indicating pre-charge timeout will be displayed.

[0054] After the voltage of the charging module is switched by the main relay, the main relay is closed to complete the power-on process. If the main relay fails to switch states within the preset time, a main relay malfunction is indicated.

[0055] After the power-on process is completed, the charging process is further executed, the insulation detection is activated, and the DC relay of the charging pile closes the K1 and K2 switches.

[0056] After the insulation test is completed, the PDU control board of the DC cabinet controls the main relay of the charging module to disconnect the KM1 and KM2 switches under high voltage, controlling the charging module to maintain a constant voltage operating mode. The DC cabinet then enters standby mode and stops voltage output.

[0057] The main control board of the charging pile controls the DC relay to disconnect switches K1 and K2, and enters the charging parameter configuration stage. The PDU control board adjusts the output voltage of the charging module to achieve a stable required voltage.

[0058] The PDU control board controls the main relay of the charging module to close the KM1 and KM2 switches under high voltage.

[0059] The main control board of the charging pile controls the DC relay to close switches K1 and K2, and the PDU control board controls the charging module to switch to constant current charging mode, entering the charging stage. This causes the DC voltage to be output to the charging gun connection interface, and the charging gun connects to the electric vehicle to begin charging.

[0060] Example 3

[0061] The difference between this embodiment and embodiment two is that step S2 does not include closing the main relay of the charging module, while step S1 specifically involves: after the insulation detection stage ends, adjusting the output voltage of the charging module to below 60V, and the charging module maintaining a constant voltage working mode.

[0062] Specifically, the electric vehicle and the charging station complete the physical connection, power on, and perform low-voltage auxiliary power matching before entering the handshake identification stage.

[0063] The charging pile sends a signal to start charging to the DC cabinet. The DC cabinet detects whether the charging module is powered on and closes the pre-charge relay to power on the charging module.

[0064] After the charging module is powered on, wait for the output voltage of the charging module to rise. If the required output voltage is not reached within the preset time, an error message indicating pre-charge timeout will be displayed.

[0065] After the voltage of the charging module is switched by the main relay, the main relay is closed to complete the power-on process. If the main relay fails to switch states within the preset time, a main relay malfunction is indicated.

[0066] After the power-on process is completed, the charging process is further executed, the insulation detection is activated, and the DC relay of the charging pile closes the K1 and K2 switches.

[0067] After the insulation test is completed, the voltage output of the charging module is adjusted to below 60V, and the PDU control board controls the charging module to maintain a constant voltage working mode.

[0068] The DC cabinet feeds back the voltage status of the charging module to the charging pile. The main control board of the charging pile controls the DC relay to disconnect the K1 and K2 switches, and enters the charging parameter configuration stage. The PDU control board adjusts the output voltage of the charging module to achieve a stable required voltage.

[0069] The main control board of the charging pile controls the DC relay to close switches K1 and K2, and the PDU control board controls the charging module to switch to constant current charging mode, entering the charging stage. This causes the DC voltage to be output to the charging gun connection interface, and the charging gun connects to the electric vehicle to begin charging.

[0070] In summary, the present invention provides a split-type charging pile that can shorten the charging start-up time of electric vehicles and a method that can shorten the charging start-up time of electric vehicles. It avoids the problem of the charging module stopping and restarting and then outputting a stable voltage during the charging start-up process, which increases the charging start-up time, thereby enabling the charging APP to display the charging start-up result faster.

[0071] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0073] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for shortening the charging start-up time of electric vehicles, applied to split-type charging piles, characterized in that, The split-type charging pile includes a DC cabinet and a charging pile. The DC cabinet includes a charging module, a PDU control board, and a charging module main relay. The charging pile includes a DC relay. The PDU control board is used to control the charging module main relay. The output terminal of the charging module is connected to the input terminal of the charging module main relay. The output terminal of the charging module main relay is connected to the input terminal of the DC relay. The method includes the following steps: S1. After the insulation detection phase is completed, the charging module maintains a constant voltage operating mode. S2. Disconnect the DC relay of the charging pile, enter the charging parameter configuration stage, and adjust the output voltage of the charging module to achieve a stable required voltage; S3. Close the DC relay of the charging pile to control the charging module to switch to constant current charging mode and enter the charging stage.

2. The method for shortening the charging start-up time of an electric vehicle according to claim 1, characterized in that: The S1 step specifically involves: after the insulation detection phase is completed, disconnecting the main relay of the charging module, and maintaining the constant voltage working mode of the charging module.

3. The method for shortening the charging start-up time of an electric vehicle according to claim 2, characterized in that: The step S2 is followed by closing the main relay of the charging module.

4. The method for shortening the charging start-up time of an electric vehicle according to claim 1, characterized in that: The S1 step specifically involves: after the insulation detection stage is completed, adjusting the voltage output by the charging module to below the safe voltage, and maintaining the charging module in constant voltage operation mode.

5. The method for shortening the charging start-up time of an electric vehicle according to claim 4, characterized in that: The safety voltage is 60V.

6. The method for shortening the charging start-up time of an electric vehicle according to claim 1, characterized in that: The DC cabinet also includes a pre-charge relay, which is connected between the charging module and the PDU control board.

7. The method for shortening the charging start-up time of an electric vehicle according to claim 1, characterized in that: The charging pile also includes a main control board for controlling the DC relay.

8. A method for shortening the charging start-up time of an electric vehicle according to claim 7, characterized in that: The PDU control board establishes a communication connection with the charging module; the main control board of the charging pile establishes communication connections with other modules inside the charging pile and the BMS of the electric vehicle.

9. A method for shortening the charging start-up time of an electric vehicle according to claim 7, characterized in that: The PDU control board is communicatively connected to the main control board of the charging pile. The charging pile also includes a charging gun connection cable interface, and the output terminal of the DC relay is connected to the input terminal of the charging gun connection cable interface.

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