CN110014916B - Vehicle direct-current charging system and method based on energy equalizing charge - Google Patents

Abstract

The invention provides a vehicle direct current charging system and method based on energy equalizing charge, wherein the system comprises a comprehensive control unit, a charging muzzle unit, a communication data interaction unit and a charging core module; the charging gun port unit at least comprises a first charging gun and a second charging gun, wherein the first charging gun and the second charging gun are respectively used for being inserted into a first vehicle and a second vehicle and acquiring charging data of the corresponding vehicles; the integrated control unit comprises an integrated controller and an energy balance charging module, and the communication data interaction unit is used for transmitting the acquired charging data to the integrated controller; the energy balance charging module is used for carrying out charge balance energy allocation according to the charging data so as to adjust the electric power output by the charging core module to the first vehicle and the second vehicle; according to the invention, the charging current can be reasonably adjusted and matched according to the demand current of the BMS of the vehicle, so that the batteries of the first vehicle and the second vehicle can be better energy-supplemented, and the charging efficiency is improved.

Description

A vehicle DC charging system and method based on energy balanced charging

Technical Field

The present invention relates to the technical field of vehicle charging, and in particular to a vehicle direct current charging system and method based on energy balanced charging.

Background technique

At present, the charging method widely used for electric vehicles is the constant voltage and constant current charging method with two guns (A gun and B gun) with a fixed number of chargers and fixed output power. Within the limited current range of the charging gun, when the A gun and the B gun charge two vehicles at the same time, the two vehicles cannot achieve the best charging efficiency due to the output power limitations of the A gun and the B gun. This charging method will cause the vehicle charging time to be too long, the charging efficiency of the charging pile to be too low, and the A gun and the B gun of the charging pile to work unbalancedly, thus affecting its operating efficiency.

Summary of the invention

In order to overcome the problems existing in the above-mentioned prior art, the main purpose of the present invention is to provide a vehicle DC charging system based on energy balanced charging, which can reasonably adjust and match the charging current according to the required current of the vehicle battery management system to improve the charging efficiency.

In order to achieve the above object, the present invention specifically adopts the following technical solutions:

The present invention provides a vehicle DC charging system based on energy balanced charging, comprising a comprehensive control unit, a charging muzzle unit, a communication data interaction unit, a DC output unit, a vehicle charging control module and a charging core module;

The charging gun muzzle unit at least includes a first charging gun and a second charging gun, the first charging gun is used to plug into a first vehicle, and the second charging gun is used to plug into a second vehicle; the input end of the DC output unit is connected to the charging core module, and the output end of the DC output unit is respectively connected to the first charging gun and the second charging gun; the integrated control unit includes an integrated controller and an energy balancing charging module, and the integrated controller is connected to the energy balancing charging module; the communication data interaction unit is respectively connected to the integrated controller and the first charging gun and the second charging gun;

The vehicle charging control module is connected to the energy balancing charging module and the charging core module respectively, and the energy balancing charging module is used to allocate the electric power used by the charging core module to charge the first vehicle and the second vehicle according to the charging data of the first vehicle and the second vehicle.

Preferably, it also includes an energy output module, the input end of the energy output module is connected to the charging core module, the output end of the energy output module is connected to the DC output unit, and the charging core module includes a module output group switching unit and a module group communication allocation unit, the module group communication allocation unit is used to reprogram the module group number and logical communication address of the energy output module according to the control signal output by the vehicle control unit, and the module output group switching unit is used to switch the DC output bus according to the reprogrammed energy output module.

Preferably, the integrated control unit also includes an auxiliary power supply control and electromagnetic lock control module, which are respectively connected to the integrated controller, the first charging gun and the second charging gun. The auxiliary power supply control and electromagnetic lock control module is controlled by the integrated controller to lock the interface between the first charging gun and the first vehicle and the interface between the second charging gun and the second vehicle, and at the same time provide power to the battery management systems of the first vehicle and the second vehicle.

Preferably, the integrated control unit further comprises an insulation detection function module, which is connected to the integrated controller and is used for detecting insulation data of the DC output of the charging system and transmitting the insulation data to the integrated controller.

Preferably, the integrated control unit further comprises a switch quantity detection function module, which is connected to the integrated controller and is used to detect switch status data of the charging system and transmit the switch status data to the integrated controller.

Preferably, it also includes a vehicle charging monitoring module, which is connected to the DC output unit and the energy balancing charging module respectively, and monitors the charging output data of the DC output unit through the vehicle charging monitoring module and feeds back the charging output data to the energy balancing charging module.

Correspondingly, the present invention also provides a vehicle DC charging method based on energy equalization charging, comprising the steps of:

S11, the system establishes a physical connection with at least two vehicles to be charged through a charging gun and determines that the physical connection is reliable;

S12, acquiring charging data of each vehicle to be charged through the physical connection and determining that the charging data matches the system;

S13, confirming that the insulation of the system charging DC output and the system switch status are normal;

S14, charging each vehicle to be charged and allocating the electric power output by the system to each vehicle to be charged according to the charging data of each vehicle;

The charging data includes the vehicle's power data, the vehicle's charging voltage and the vehicle's charging current.

Preferably, the step S14, charging each vehicle to be charged and allocating the electric power output by the system to each vehicle to be charged according to the charging data of each vehicle, is specifically:

The system charges each vehicle to be charged; at the same time, the module group number and logical communication address of the energy output module in the system are reprogrammed according to the charging data of each vehicle, and the DC output bus is switched according to the reprogrammed energy output module.

Preferably, the method further includes the step: S15, real-time monitoring of the charging output simulation data of the system and feeding back the charging output simulation data in the form of a data message after calculation.

The DC charging system of the present invention monitors the charging demand power data of the two vehicles in real time through the communication data interaction unit and transmits the power data to the integrated controller, so that the integrated controller can control the energy balancing charging module to perform charging balancing energy allocation according to the power demand of the two vehicles, and then control the charging core module to allocate the electric power output to the first vehicle and the second vehicle through the vehicle charging control module. That is, the charging current is reasonably adjusted and matched according to the demand current of the vehicle BMS (battery management system), so that the batteries of the first vehicle and the second vehicle can be better replenished with energy, the charging efficiency can be improved, and at the same time, the electric pile resources can be fully utilized and the loss cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a vehicle DC charging system based on energy balancing charging according to an embodiment of the present invention;

FIG2 is a flow chart of a vehicle DC charging method based on energy balancing charging according to an embodiment of the present invention;

In the figure: 1. Integrated control unit; 11. Integrated controller; 12. Auxiliary power supply control and electromagnetic lock control module; 13. Energy balancing charging module; 14. Insulation detection function module; 15. Switching quantity detection function module; 2. Charging muzzle unit; 21. First charging gun; 22. Second charging gun; 3. Communication data interaction unit; 4. Vehicle charging control module; 5. Charging core module; 51. Module output group switching unit; 52. Module group communication coordination unit; 6. Vehicle charging monitoring module; 7. Energy output module; 8. DC output unit.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

This embodiment discloses a vehicle DC charging system based on energy balanced charging, which includes an integrated control unit 1, a charging gun unit 2, a communication data interaction unit 3, a vehicle charging control module 4, a charging core module 5, a vehicle charging monitoring module 6, an energy output module 7 and a DC output unit 8. Among them, the charging gun unit 2 includes at least a first charging gun 21 and a second charging gun 22, the first charging gun 21 is used to be plugged into a first vehicle to establish a physical connection with the first vehicle, and the second charging gun 22 is used to be plugged into a second vehicle to establish a physical connection with the second vehicle, so that the first vehicle and the second vehicle are charged and the charging data of the first vehicle and the second vehicle are obtained through the first charging gun 21 and the second charging gun 22 respectively. The integrated control unit 1 includes an integrated controller 11 and an energy balancing charging module 13 connected to the integrated controller 11; the communication data interaction unit 3 is respectively connected to the first charging gun 21, the second charging gun 22 and the integrated controller 11; the charging core module 5 is respectively connected to the first charging gun 21 and the second charging gun 22 through the DC output unit 8, converts the AC power into a voltage and current suitable for the vehicle and outputs electric energy to the first charging gun 21 and the second charging gun 22, thereby charging the first vehicle and the second vehicle. The vehicle charging control module 4 is respectively connected to the charging core module 5 and the energy balancing charging module 13, so that the connection gun detection is performed through the communication data interaction unit 3 to ensure the reliability of the physical connection between the charging gun and the vehicle. At the same time, the charging data of the first vehicle and the second vehicle are transmitted to the integrated controller 11 through the communication data interaction unit 3, so that the integrated controller 11 can control the energy balancing charging module 13 to perform charging balancing energy allocation according to the charging data of the first vehicle and the second vehicle, that is, the power demand situation, and then control the charging core module 5 through the vehicle charging control module 4, and then allocate the electric power output by the charging core module 5 to the first charging gun 21 and the second charging gun 22.

In this embodiment, an energy output module 7 is also included. The energy output module 7 is connected to the charging core module 5 and the DC output unit 8 respectively, and the charging core module 5 includes a module output group switching unit 51 and a module group communication allocation unit 52, so that the module group number and the logical communication address of the energy output module 7 are reprogrammed through the module group communication allocation unit 52 according to the charging balanced energy allocation of the energy balanced charging module 13, and the DC output bus of the reprogrammed energy output module 7 is switched through the module output group switching unit 51, thereby realizing the adjustment of the electric power for charging the first vehicle and the second vehicle.

The integrated control unit 1 also includes an auxiliary power supply control and electromagnetic lock control module 12, an insulation detection function module 14 and a switch detection function module 15. The auxiliary power supply control and electromagnetic lock control module 12 are respectively connected to the first charging gun 21, the second charging gun 22 and the integrated controller 11, and the insulation detection function module 14 and the switch detection function module 15 are respectively connected to the integrated controller 11. The auxiliary power supply control and electromagnetic lock control module 12 locks the connection port between the first charging gun 21 and the first vehicle and the connection port between the second charging gun 22 and the second vehicle, and also supplies power to the battery management system (BMS) of the first vehicle and the second vehicle; the insulation detection function module 14 detects the insulation of the charging DC output of the charging system, and the switch status of all switches of the charging system is detected by the switch detection function module 15.

In order to monitor the charging output data of the DC output unit 8 in real time, such as the charging output voltage, the charging output current, etc. In this embodiment, a vehicle charging monitoring module 6 is also provided, and the vehicle charging monitoring module 6 is respectively connected to the DC output unit 8 and the energy balancing charging module 13. The output charging data of the DC output unit 8 is monitored in real time by the vehicle charging monitoring module 6 and fed back to the energy balancing charging module 13.

In the specific charging process, when the first vehicle and the second vehicle are parked in place, the first charging gun 21 and the second charging gun 22 are respectively plugged into the first vehicle and the second vehicle to establish a physical connection, and the communication data interaction unit 3 is used to perform a gun connection test to confirm that the first charging gun 21 is reliably connected to the first vehicle and the second charging gun 22 is reliably connected to the second vehicle. Then, the auxiliary power supply control and electromagnetic lock control module 12 locks the connection port of each charging gun with the corresponding vehicle and supplies power to the battery management system of each vehicle respectively. At this time, the integrated controller 11 exchanges data and matches charging data with each vehicle through the communication data interaction unit 3 and the charging gun, such as whether the charging voltage and charging current of the charging vehicle match the charging output voltage and charging output current of the system. After the match is successful, the integrated controller 11 first starts the insulation detection function module 14 to detect the DC output insulation of the system, and then starts the switch quantity detection function module 15 to detect all the switch states of the system. After confirming that there is no abnormality in the insulation and switch state of the system, the integrated controller 11 starts the energy balancing charging module 13, otherwise the vehicle charging is terminated.

After the energy balancing charging module 13 is started, the communication data interaction unit 3 transmits the charging demand power data of each vehicle to the integrated controller 11 in real time. The energy balancing charging module 13 performs charging balancing energy allocation according to the charging demand power data of each vehicle and controls the vehicle charging control module 4, thereby enabling the charging core module 5 to reprogram the corresponding module group number and logical communication address of the energy output module 7, and perform DC output bus switching according to the reprogrammed energy output module 7 to achieve the allocation of the output power of the first charging gun 21 and the second charging gun 22. At the same time, the vehicle charging monitoring module 6 detects the charging output data of the system in real time, including the charging output voltage, the charging output current, etc., and feeds back the charging output data to the energy balancing charging module 13, so that the energy balancing charging module 13 can realize closed-loop energy regulation, so that the system can reliably and stably charge the vehicle, and achieve the best charging efficiency for each vehicle.

Correspondingly, this embodiment also provides a vehicle DC charging method based on energy equalization charging, comprising the steps of:

S11, the system establishes a physical connection with at least two vehicles to be charged through a charging gun and determines that the physical connection is reliable;

S12, acquiring charging data of each vehicle to be charged through the physical connection and determining that the charging data matches the system;

The charging data includes the vehicle's power data, the vehicle's charging voltage and the vehicle's charging current.

S13, confirming that the insulation of the system charging DC output and the system switch status are normal;

S14, charging each vehicle to be charged and allocating the electric power output by the system to each vehicle to be charged according to the charging data of each vehicle;

Specifically, the system charges each vehicle to be charged; at the same time, the module group number and logical communication address of the energy output module in the system are reprogrammed according to the charging data of each vehicle, and the DC output bus is switched according to the reprogrammed energy output module.

S15, real-time monitoring of the charging output simulation data of the system and feeding back the charging output simulation data in the form of a data message after calculation.

The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (7)

1. A vehicle DC charging system based on energy equalization charging, characterized in that it includes a comprehensive control unit, a charging muzzle unit, a communication data interaction unit, a DC output unit, a vehicle charging control module and a charging core module; The charging gun muzzle unit at least includes a first charging gun and a second charging gun, the first charging gun is used to plug into a first vehicle, and the second charging gun is used to plug into a second vehicle; the input end of the DC output unit is connected to the charging core module, and the output end of the DC output unit is respectively connected to the first charging gun and the second charging gun; the integrated control unit includes an integrated controller and an energy balancing charging module, and the integrated controller is connected to the energy balancing charging module; the communication data interaction unit is respectively connected to the integrated controller and the first charging gun and the second charging gun; The vehicle charging control module is connected to the energy balancing charging module and the charging core module respectively, and the energy balancing charging module is used to allocate the electric power of the charging core module to charge the first vehicle and the second vehicle according to the charging data of the first vehicle and the second vehicle; The vehicle DC charging system also includes an energy output module, the charging core module is connected to the DC output unit through the energy output module, and the charging core module includes a module output group switching unit and a module group communication allocation unit, the module group communication allocation unit is used to reprogram the module group number and the logical communication address of the energy output module according to the control signal output by the vehicle control unit, and the module output group switching unit is used to switch the DC output bus according to the reprogrammed energy output module; The integrated control unit also includes an auxiliary power supply control and electromagnetic lock control module, which are respectively connected to the integrated controller, the first charging gun and the second charging gun. The integrated controller controls the auxiliary power supply control and electromagnetic lock control module to lock the interface between the first charging gun and the first vehicle and the interface between the second charging gun and the second vehicle, and at the same time provides power to the battery management systems of the first vehicle and the second vehicle. 2. According to a vehicle DC charging system based on energy equalization charging in claim 1, it is characterized in that the integrated control unit also includes an insulation detection function module, the insulation detection function module is connected to the integrated controller, and the insulation detection function module is used to detect the insulation data of the DC output of the charging system and transmit the insulation data to the integrated controller. 3. According to claim 2, a vehicle DC charging system based on energy balancing charging is characterized in that the integrated control unit also includes a switch quantity detection function module, which is connected to the integrated controller, and the switch quantity detection function module is used to detect the switch status data of the charging system and transmit the switch status data to the integrated controller. 4. A vehicle DC charging system based on energy balancing charging according to any one of claims 1 to 3, characterized in that it also includes a vehicle charging monitoring module, which is connected to the DC output unit and the energy balancing charging module respectively, and monitors the charging output data of the DC output unit through the vehicle charging monitoring module and feeds the charging output data back to the energy balancing charging module. 5. A charging method for a vehicle DC charging system based on energy balancing charging according to any one of claims 1 to 4, characterized in that it comprises the steps of: S11, the system establishes a physical connection with at least two vehicles to be charged through a charging gun and determines that the physical connection is reliable; S12, acquiring charging data of each vehicle to be charged through the physical connection and determining that the charging data matches the system; S13, confirming that the insulation of the system charging DC output and the system switch status are normal; S14, charging each vehicle to be charged and allocating the electric power output by the system to each vehicle to be charged according to the charging data of each vehicle; The charging data includes the vehicle's power data, the vehicle's charging voltage and the vehicle's charging current. 6. A vehicle DC charging method based on energy balancing charging according to claim 5, characterized in that, in step S14, each vehicle to be charged is charged and the electric power output by the system to each vehicle to be charged is allocated according to the charging data of each vehicle, specifically: The system charges each vehicle to be charged; at the same time, the module group number and logical communication address of the energy output module in the system are reprogrammed according to the charging data of each vehicle, and the DC output bus is switched according to the reprogrammed energy output module. 7. The vehicle DC charging method based on energy equalization charging according to claim 5, characterized in that it also includes the steps of: S15, real-time monitoring of the charging output simulation data of the system and feeding back the charging output simulation data in the form of a data message after calculation.