Quick charge control system based on all-in-one controller and working method

Abstract

The invention relates to the technical field of new energy automobiles, and particularly discloses a fast charge control system based on an all-in-one controller and a working method.The fast charge control system comprises a power battery, the all-in-one controller and a vehicle control unit, the power battery is a power source for providing a power source for a new energy automobile, and the power battery is connected with the all-in-one controller and the vehicle control unit through a CAN bus; the power battery is connected with the charging pile through a high-level data line, a low-level data line and a charging CAN bus; the all-in-one controller is a control unit for high-voltage load work of the new energy automobile, and the all-in-one controller is connected with the whole automobile controller and the charging pile; the whole vehicle controller is a control unit for receiving and processing high and low voltage signals of the whole vehicle of the new energy vehicle; the charging process can be more stable and safer, the multi-scene use requirements of different user groups on the whole vehicle can be greatly met, meanwhile, the optimized high-voltage loop framework is combined, the design cost of the whole vehicle is reduced, and the pipeline arrangement attractiveness and the space utilization rate are also improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle technology, and in particular to a fast charging control system and a working method based on an all-in-one controller. Background Art

[0002] With the rapid advancement of new energy vehicle technology and the growing number of younger customers, new energy vehicles are not only our daily commuting tools and commercial profit tools, but also a second safe haven for customers. Beyond the age-old issue of battery life, vehicle intelligence and comfort are increasingly becoming the preferred criteria for the public when purchasing a car. To meet the diverse fast-charging needs of different customers in various scenarios, safe, reliable, and more convenient fast-charging control solutions for new energy vehicles can make vehicles more competitive in an increasingly complex market environment. Currently, the fast-charging control solution for pure electric light trucks mostly uses a high-voltage distribution box plus an all-in-one controller. This not only increases vehicle cost and layout space, affects the aesthetics of the wiring harness layout, but also leads to complex fast-charging control strategies, low safety, and poor user experience, creating significant obstacles to product marketing. Therefore, there is an urgent need to design a fast-charging control system and operating method based on an all-in-one controller to address the complex fast-charging control strategies, low safety, and poor user experience of existing new energy vehicles. Summary of the Invention

[0003] In response to the problems existing in the prior art, the purpose of the present invention is to provide a fast charging control system and working method based on an all-in-one controller. Through the system linkage of the power battery, the all-in-one controller and the vehicle controller, the design of the vehicle charging control strategy is comprehensively refined, and the construction of the all-in-one controller vehicle high-voltage load control architecture, charging closed loop and multi-scenario charging application are realized. At the same time, the high-voltage circuit topology is optimized, the application of the power battery high-voltage box is eliminated, the product cost is reduced, and the space utilization rate of the vehicle is improved.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a fast charging control system based on an all-in-one controller, including a power battery, an all-in-one controller, and a vehicle controller.

[0005] The power battery is a power source that provides power for new energy vehicles. The power battery is connected to the all-in-one controller and the vehicle controller through the CAN bus. The power battery is connected to the charging pile through high and low level data lines and the charging CAN bus.

[0006] The all-in-one controller is a control unit for the high-voltage load of new energy vehicles, and is connected to the vehicle controller and the charging pile;

[0007] The vehicle controller is a control unit for receiving and processing high and low voltage signals of new energy vehicles.

[0008] A method for operating a fast charging control system based on an all-in-one controller includes the following steps:

[0009] S1: The power battery monitors the status of the fast charging contactor in the all-in-one controller in real time during the entire charging process. At the beginning and end of charging, the power battery accurately controls the closing and opening of the fast charging contactor of the all-in-one controller;

[0010] S2. The all-in-one controller completes the accessory pre-charge circuit closure, fast charge circuit closure, and high-voltage load enablement according to the relevant instructions of the vehicle controller and power battery;

[0011] S3, the vehicle controller monitors the charging status of the all-in-one controller and power battery in real time;

[0012] S4. After the power battery and the charging pile complete the interaction, the power battery closes the main negative contactor and feedbacks the closed state. After the all-in-one controller receives the fast charge closing command sent by the power battery, the power battery closes the fast charge contactor.

[0013] S5. After receiving the fast charge closing command from the power battery, the all-in-one controller completes the closing of the fast charge contactor;

[0014] S6: The vehicle controller adjusts the vehicle high-voltage power-on enable to enable the main drive and auxiliary drive separately. The vehicle controller controls the auxiliary drive circuit power-on and DCDC operation of the all-in-one controller based on the charging gun connection status and charging status sent by the power battery.

[0015] The status of S7, vehicle controller, all-in-one controller and power battery are linked through the control of the switching sequence of fast charging contactor and main negative contactor and the multi-dimensional judgment of monitoring variables.

[0016] Preferably, the state change of the power battery during the charging process in step S1 will be exchanged with the all-in-one controller and the vehicle controller in the form of extended frame messages via the CAN bus.

[0017] Preferably, the vehicle controller in step S3 controls the operation of high-voltage accessories except the main drive circuit of the all-in-one controller.

[0018] Preferably, after the charging of the power battery in step S4 is completed, the power battery delays 500ms to send the fast charging contactor disconnection instruction and charging. During the process of sending the instruction, the power battery continuously monitors the high voltage instruction sent by the vehicle controller to disconnect or continue to close the main negative contactor, so as to ensure that the high voltage is not interrupted during the charging process.

[0019] Preferably, the all-in-one controller in step S5 receives the auxiliary drive power-on instruction sent by the vehicle controller to close the auxiliary drive pre-charge and main contactors. After receiving the closed state of the auxiliary drive main contactor, the vehicle controller sends a DCDC enable. The all-in-one controller responds to the DCDC enable and completes the DCDC working action.

[0020] Preferably, the main drive circuit of the all-in-one controller in step S6 is in a low high voltage state throughout the charging process.

[0021] Preferably, the status linkage of the vehicle controller, the all-in-one controller and the power battery in step S7 enables the vehicle to charge normally in the OFF, ON or START state. During the key gear switching process, the vehicle charging state will not be disconnected. During the charging process, the electric heating, electric air conditioning and upper mounted cooling functions are used through the instrument panel air conditioning control panel and the upper mounted cooling control panel. After charging is completed, if the charging gun is not disconnected, the vehicle can use the electric air conditioning and upper mounted cooling functions.

[0022] The present invention has the following beneficial effects:

[0023] The fast charging control system and working method based on the all-in-one controller designed by the present invention adopts multi-module information interaction and linkage, and refined control strategy design, which not only makes the charging process more stable and safe, but also greatly meets the needs of different user groups for multi-scenario use of the whole vehicle. At the same time, combined with the optimized high-voltage circuit architecture and the elimination of redundant high-voltage distribution boxes, it not only reduces the design cost of the whole vehicle, but also improves the aesthetics of the pipeline layout and space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a block diagram of the fast charging control system based on an all-in-one controller.

[0025] Figure 2 It is a flow chart of the working method of the fast charging control system based on the all-in-one controller. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely further describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, a fast charging control system based on an all-in-one controller includes a power battery, an all-in-one controller, and a vehicle controller.

[0028] The power battery is the source of power for new energy vehicles. It connects to the all-in-one controller and the vehicle controller via the CAN bus. It also connects to the charging station via high and low-level data lines and the charging CAN line. The power battery exchanges information with the charging station and reports battery status to the all-in-one controller and the vehicle controller via the CAN bus after charging begins.

[0029] The all-in-one controller is a control unit for the high-voltage loads of new energy vehicles. It connects the vehicle controller and the charging station. It controls power distribution based on instructions from the power battery and the vehicle controller, and also feeds back various charging information to the power battery and the vehicle controller.

[0030] The vehicle controller (VCU) is a control unit that receives and processes high and low voltage signals for new energy vehicles. It integrates information from the power battery and the all-in-one controller to control the high-voltage loads in various scenarios.

[0031] like Figure 2 As shown, a working method of a fast charging control system based on an all-in-one controller includes the following steps:

[0032] 1. The power battery monitors the status of the fast-charging contactor in the all-in-one controller in real time throughout the charging process. At the beginning and end of charging, the power battery accurately controls the closing and disconnection of the fast-charging contactor of the all-in-one controller. The status changes of the power battery during the charging process will be exchanged with the all-in-one controller and the vehicle controller in the form of extended frame messages through the CAN bus, which facilitates the vehicle controller to monitor and complete the multi-scenario functional application of the vehicle.

[0033] 2. The all-in-one controller completes the accessory pre-charging circuit closure, fast charging circuit closure and high-voltage load enabling work according to the relevant instructions of the vehicle controller and power battery; the all-in-one controller feeds back the controller status to the vehicle controller and power battery in real time through the CAN bus to ensure the high-voltage safety of the vehicle during the charging process.

[0034] 3. The vehicle controller monitors the charging status of the all-in-one controller and power battery in real time. While ensuring charging safety, the vehicle controller controls the operation of high-voltage accessories other than the main drive circuit of the all-in-one controller, improving the vehicle's intelligent application and driver comfort.

[0035] 4. After the power battery and the charging pile complete the interaction, the power battery closes the main negative contactor and feeds back the closing status. After the all-in-one controller receives the fast charging closing command sent by the power battery, the power battery closes the fast charging contactor. After the charging of the power battery is completed, the power battery delays 500ms to send the fast charging contactor disconnection command and charge. During the power battery sending the command, it continuously monitors the high-voltage command sent by the vehicle controller to disconnect or continue to close the main negative contactor, so as to achieve the high-voltage non-interrupted working condition requirement during the charging process.

[0036] After the power battery successfully shakes hands with the charging pile, it requests to enter the DC charging process and completes the closure of the main negative contactor. At the same time, after detecting that the fast charging contactor status feedback from the all-in-one controller has no adhesion fault, it sends a fast charging contactor closure command to the all-in-one controller and then starts charging. It will not stop until charging is completed or the charging connection signal is lost, disconnect the fast charging contactor, and detect whether the high voltage command is received within 500ms. If not, disconnect the main negative contactor.

[0037] 5. After receiving the fast-charge closure command from the power battery, the all-in-one controller closes the fast-charge contactor. The all-in-one controller receives the auxiliary drive power-on command from the vehicle controller to close the auxiliary drive pre-charge and main contactors. Upon receiving the auxiliary drive main contactor closure status, the vehicle controller issues a DCDC enable signal. The all-in-one controller responds to this DCDC enable signal and completes the DCDC operation. Based on the driver's operational request, other high-voltage accessories of the all-in-one controller also receive the vehicle controller enable signal to perform associated actions.

[0038] After waking up from charging, the all-in-one controller receives the fast charging contactor signal sent by the power battery to close the fast charging contactor. At the same time, it completes the contactor closure and control module drive according to the high-voltage load instruction sent by the vehicle controller. When exiting the charging state, it receives the instruction sent by the vehicle controller to determine whether it is necessary to continue powering on or stop and enter the power-off process. The auxiliary drive power-off process is guaranteed to be completed within 300ms. The vehicle controller does not need to detect the auxiliary drive contactor status too much to control the main negative contactor to be attracted, thereby simplifying the charging power-off process and avoiding undervoltage faults caused by the main negative contactor being disconnected before the auxiliary drive high voltage is disconnected.

[0039] 6. The vehicle controller adjusts the vehicle's high-voltage power-on enable to enable the main drive and auxiliary drive separately. The vehicle controller controls the power-on of the auxiliary drive circuit of the multi-in-one controller and the DCDC operation according to the charging gun connection status and charging status sent by the power battery. The main drive circuit of the multi-in-one controller is in a low-voltage state throughout the charging process to avoid high-voltage hazards caused by vehicle misoperation.

[0040] 7. The status of the vehicle controller, all-in-one controller, and power battery are linked. Through the control of the switching sequence of the fast charging contactor and the main negative contactor and the multi-dimensional determination of the monitoring variables, the status of the vehicle controller, all-in-one controller, and power battery are linked to ensure normal charging of the vehicle in the OFF, ON, or START state. The key position switching process will not cause the vehicle charging state to be disconnected. During the charging process, the instrument panel air conditioning control panel and the upper body cooling control panel can use the electric heating (PTC), electric air conditioning (AC), and upper body cooling functions. If the charging gun is not disconnected after charging is completed, the vehicle can use the electric air conditioning and upper body cooling functions, greatly satisfying customers' multi-scenario charging needs.

[0041] After the vehicle controller receives the charging status sent by the power battery, if the vehicle is in the READY state, the vehicle controller stops sending the motor enable to the all-in-one controller and disconnects the main drive high-voltage contactor, exits the READY state and enters the ON state for charging. The auxiliary drive remains in the high-voltage state until charging is completed. If the vehicle is in the OFF or ON state, the vehicle controller will send the auxiliary drive power-on command and DCDC work enable, and the DCDC module will enter the working state. In the ON state, the air conditioning, upper-mounted cooling machine and other functions can also be started according to the driver's request, and their response will not be interrupted due to the completion of charging.

[0042] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

[0043] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A fast charging control system based on an all-in-one controller, characterized in that: Including power battery, all-in-one controller, vehicle controller, The power battery is a power source that provides power for new energy vehicles. The power battery is connected to the all-in-one controller and the vehicle controller through the CAN bus. The power battery is connected to the charging pile through high and low level data lines and the charging CAN bus. The all-in-one controller is a control unit for the high-voltage load of new energy vehicles, and is connected to the vehicle controller and the charging pile; The vehicle controller is a control unit for receiving and processing high and low voltage signals of new energy vehicles.

2. The working method of the fast charging control system based on the all-in-one controller according to claim 1, characterized in that: The following steps are involved: S1: The power battery monitors the status of the fast charging contactor in the all-in-one controller in real time during the entire charging process. At the beginning and end of charging, the power battery accurately controls the closing and opening of the fast charging contactor of the all-in-one controller; S2. The all-in-one controller completes the accessory pre-charge circuit closure, fast charge circuit closure, and high-voltage load enablement according to the relevant instructions of the vehicle controller and power battery; S3, the vehicle controller monitors the charging status of the all-in-one controller and power battery in real time; S4. After the power battery and the charging pile complete the interaction, the power battery closes the main negative contactor and feedbacks the closed state. After the all-in-one controller receives the fast charge closing command sent by the power battery, the power battery closes the fast charge contactor. S5. After receiving the fast charge closing command from the power battery, the all-in-one controller completes the closing of the fast charge contactor; S6: The vehicle controller adjusts the vehicle high-voltage power-on enable to enable the main drive and auxiliary drive separately. The vehicle controller controls the auxiliary drive circuit power-on and DCDC operation of the all-in-one controller based on the charging gun connection status and charging status sent by the power battery. The status of S7, vehicle controller, all-in-one controller and power battery are linked through the control of the switching sequence of fast charging contactor and main negative contactor and the multi-dimensional judgment of monitoring variables.

3. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: The state change of the power battery during the charging process in step S1 will be exchanged with the all-in-one controller and the vehicle controller in the form of extended frame messages via the CAN bus.

4. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: The vehicle controller in step S3 controls the operation of high-voltage accessories except the main drive circuit of the all-in-one controller.

5. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: After the charging of the power battery in step S4 is completed, the power battery delays 500ms to send the fast charging contactor disconnection instruction and charging. During the power battery sending the instruction, it continuously monitors the high-voltage instruction sent by the vehicle controller to disconnect or continue to close the main negative contactor, so as to ensure high voltage power supply during the charging process.

6. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: The all-in-one controller in step S5 receives the auxiliary drive power-on instruction sent by the vehicle controller to close the auxiliary drive pre-charge and main contactors. After receiving the auxiliary drive main contactor closed state, the vehicle controller sends a DCDC enable. The all-in-one controller responds to the DCDC enable and completes the DCDC working action.

7. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: The main drive circuit of the all-in-one controller in step S6 is in a low high voltage state throughout the charging process.

8. The working method of the fast charging control system based on the all-in-one controller according to claim 2, characterized in that: The status linkage of the vehicle controller, the all-in-one controller and the power battery in step S7 enables the vehicle to charge normally in the OFF, ON or START state. The vehicle charging state will not be disconnected during the key gear switching process. During the charging process, the electric heating, electric air conditioning and upper mounted cooling functions are used through the instrument panel air conditioning control panel and the upper mounted cooling control panel. After charging is completed, if the charging gun is not disconnected, the vehicle can use the electric air conditioning and upper mounted cooling functions.

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