Intelligent charging system and method for new energy vehicle

Abstract

The invention discloses an intelligent charging system and method for a new energy vehicle, and belongs to the field of new energy. The system comprises a fuel generator, a solar cell panel, an alternating current charging port, a direct current quick charging port, an all-in-one intelligent charging control module, a power battery and a high-voltage wire harness, wherein the all-in-one intelligent charging control module is respectively connected with the fuel generator, the solar cell panel, the alternating current charging port, the direct current quick charging port and the power battery through the high-voltage wiring harness; the intelligent distribution module is used for intelligently distributing electric energy provided by the fuel generator, the solar cell panel, the alternating current charging port and the direct current quick charging port to the power battery for charging according to different working conditions of the vehicle. According to the invention, the power battery is intelligently charged under different working conditions by using various electric energy, so that the energy utilization rate is improved, the endurance is prolonged, and the standby power consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and specifically, the present invention relates to an intelligent power replenishment system and method for new energy vehicles. Background Art

[0002] In recent years, electric vehicles have developed rapidly, and battery charging for electric vehicles has become an important part of the development of electric vehicles. On the one hand, the government has continuously strengthened its support for the electric vehicle-related industry and increased investment and construction of electric vehicle charging infrastructure. On the other hand, we must also expand the types of charging energy, reduce power loss, achieve longer battery life, and save more energy.

[0003] In the prior art, the charging method of electric vehicles is relatively simple. For example, the patent publication number is CN109367433A, the publication date is 2019-02-22, and the patent name is "A smart charging pile and method with power battery health status detection and cruising range prediction": A smart charging pile with power battery health status detection and cruising range prediction, including a charging pile body, the charging pile body includes: a data acquisition module: reads and collects power battery data and charging status data and stores them, and sends the acquired data to a battery health status detection module; a battery health status detection module: detects the health of the power battery to obtain the health of the currently charged power battery, predicts the cruising range of the power battery to obtain the cruising range of the currently charged power battery, and sends the acquired health and cruising range to a touch display module and a charging control module; a touch display module: displays the health and cruising range acquired by the battery health status detection module, and realizes human-computer interaction with the user; a charging control module: charges the power battery according to the detected health.

[0004] The above-mentioned public documents only use charging piles to charge power batteries, which lacks diversity. The advantages of new energy vehicles are not only energy saving, not only green environmental protection, and not only low energy cost, but also the diversity of energy such as electricity. Any known energy can be converted into unified electricity for human use, so that the power source of electric vehicles can be mixed with multiple energy sources and applied to various vehicle operating conditions through intelligent distribution strategies, thereby ensuring that the battery has the same capacity and increased endurance. To this end, the present invention proposes a new energy vehicle intelligent power replenishment system and method. Summary of the invention

[0005] The present invention aims to overcome the shortcomings of the prior art and proposes an intelligent charging system and method for new energy vehicles to achieve the following objectives: utilizing multiple electrical energies to intelligently charge power batteries under different working conditions to improve energy utilization, increase battery life, and reduce standby power consumption.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a new energy vehicle intelligent power replenishment system, the system includes a fuel generator, a solar panel, an AC charging port, a DC fast charging port, an all-in-one intelligent power replenishment control module, a power battery, and a high-voltage wiring harness, wherein: the all-in-one intelligent power replenishment control module is respectively connected to the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery through the high-voltage wiring harness, and is used to intelligently distribute the electric energy provided by the fuel generator, solar panel, AC charging port, and DC fast charging port to the power battery for charging according to different working conditions of the vehicle.

[0007] Preferably, the all-in-one intelligent power replenishment control module includes:

[0008] The central processing unit is used to obtain vehicle status information and determine the current working conditions for intelligent distribution of electric energy;

[0009] A power distribution box, including a DCDC converter, a rectifier, and a relay. The rectifier is used to convert the AC power input from the AC charging port into DC power. The DCDC converter is used to convert the DC power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port into a power battery charging voltage. There are multiple relays, which are respectively connected in series in the circuit of the fuel generator, solar panel, AC charging port, and DC fast charging port to supply power to the power battery through a high-voltage wiring harness. The control ends of the DCDC converter, rectifier, and relay are all connected to the central processor.

[0010] Power battery management system, used to monitor the SOC, temperature, voltage and current data of the power battery;

[0011] Solar controller, which is used to monitor the output voltage of solar panels;

[0012] The vehicle controller is used to monitor the driving status of the vehicle;

[0013] Charging port sensors are respectively arranged on the AC charging port and the DC fast charging port, and are used to monitor the charging current and voltage of the AC charging port and the DC fast charging port;

[0014] CAN communication interface, the central processor is connected to the power battery management system, solar controller, vehicle controller, and charging port sensor respectively through the CAN communication interface to obtain vehicle status information.

[0015] At the same time, the present application also proposes a new energy vehicle intelligent charging method based on the above-mentioned new energy vehicle intelligent charging system, and the method includes the following steps:

[0016] Step S1, waking up the all-in-one intelligent power replenishment control module;

[0017] Step S2, the all-in-one intelligent charging control module obtains vehicle status information through CAN network messages, and the vehicle status information includes the SOC of the power battery, the output voltage of the solar panel, the driving status of the whole vehicle, and the charging current and voltage of the AC charging port or the DC fast charging port;

[0018] Step S3, the all-in-one intelligent power replenishment control module determines the current working condition according to the vehicle status information; under different working conditions, the all-in-one intelligent power replenishment control module intelligently distributes the output of the fuel generator, solar panel, AC charging port, and DC fast charging port to replenish the power battery.

[0019] Preferably, in step S1, the wake-up condition of the all-in-one intelligent power replenishment control module includes:

[0020] When the vehicle is in the ON gear, the KLI5 hard-wired signal directly wakes up the all-in-one intelligent charging control module;

[0021] When the vehicle is in the OFF gear and the voltage of the solar panel exceeds the first voltage threshold and the duration exceeds the first time threshold, the all-in-one intelligent power replenishment control module is awakened.

[0022] Preferably, the operating condition includes a first operating condition, namely: the vehicle is in motion and the power battery SOC is lower than a first SOC threshold, at which time the fuel generator is started to power the vehicle drive motor first, and the excess power is used to charge the power battery, while solar charging and external charging are prohibited.

[0023] Preferably, the operating condition includes a second operating condition, namely: the vehicle is stationary; and there is no external charging, that is, there is no current input to the DC charging port and the slow charging port; and the power battery SOC is less than the second SOC threshold; and the solar panel voltage is greater than the first voltage threshold. At this time, starting the solar panel will give priority to maintaining the power supply of the low-voltage equipment of the whole vehicle, and the excess power is used to charge the power battery.

[0024] Preferably, the operating condition includes a third operating condition, namely: the vehicle is stationary; and there is external charging, that is, there is current input to the DC charging port or the slow charging port. At this time, the solar charging port is closed, and external charging has the highest priority to charge the power battery.

[0025] Preferably, the operating condition includes a fourth operating condition, namely: the vehicle is stationary; there is no external charging input; and the solar panel voltage is less than the first voltage threshold and the duration exceeds the first time threshold. At this time, the all-in-one intelligent power replenishment control module enters a sleep state.

[0026] Preferably, during the power battery charging process, the all-in-one intelligent power replenishment control module also detects the vehicle status in real time. When the power battery SOC is greater than the second SOC threshold, and the solar panel voltage is less than the first voltage threshold and the duration exceeds the first time threshold, and there is no external charging, that is, there is no current input to the DC charging port and the slow charging port, the all-in-one intelligent power replenishment control module enters a sleep state.

[0027] Preferably, under any operating condition, the all-in-one intelligent power replenishment control module also determines whether the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery are faulty based on the vehicle status information, and immediately stops charging and issues an alarm when a fault occurs.

[0028] The technical effects of the present invention are:

[0029] (1) The intelligent power replenishment system of the present invention has a simple structure and is easy to deploy. It makes full use of various electric energies (solar panels, city electricity, DC charging piles, and engine power generation) to replenish power for the power battery, thereby improving energy utilization and extending the endurance of new energy vehicles.

[0030] (2) The all-in-one intelligent power replenishment control module of the present invention is highly integrated. While monitoring the status of each system device, it can achieve efficient and intelligent power distribution, ensuring that new energy vehicles can obtain the best energy replenishment solution under various working conditions. At the same time, faults are discovered and reported in a timely manner to ensure system safety and extend equipment life.

[0031] (3) The method of the present invention ensures that electric energy is used first for key equipment (such as drive motors and low-voltage equipment) through an intelligent allocation strategy, while replenishing power for the power battery to improve the overall energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of an intelligent power replenishment system for new energy vehicles according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of an all-in-one intelligent power replenishment control module according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of a power distribution box according to an embodiment of the present invention;

[0035] Figure 4 The present invention is a flowchart of a method for intelligent charging of new energy vehicles according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, the purpose of which is to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation. It should be noted that the words "first", "second" and the like described in this application are only for the convenience of describing the technical solution to distinguish different components, and are not used to limit this application. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments.

[0037] This embodiment provides a new energy vehicle intelligent power replenishment system, such as Figure 1 As shown, the system includes a fuel generator, a solar panel, an AC charging port, a DC fast charging port, an all-in-one intelligent power replenishment control module, a power battery, and a high-voltage wiring harness, wherein: the all-in-one intelligent power replenishment control module is connected to the fuel generator, the solar panel, the AC charging port, the DC fast charging port, and the power battery through the high-voltage wiring harness respectively.

[0038] The components of the intelligent power replenishment system of this embodiment are defined as follows:

[0039] 1. Fuel generator: A device that converts fossil energy into electrical energy, with a voltage generally around 60V.

[0040] 2. Solar panel: A device that converts solar energy into electrical energy, with a voltage generally around 60-120V.

[0041] 3. AC charging port: AC power access device.

[0042] 4. DC fast charging port: DC charging pile access device.

[0043] 5. Power battery: a device for storing and discharging electrical energy.

[0044] 6. High-voltage wiring harness: connects various devices for energy conduction

[0045] 7. An all-in-one intelligent power supply control module is used to intelligently distribute the power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port to the power battery for charging according to different vehicle working conditions. Figure 2 As shown, it includes a central processor, a power distribution box, a power battery management system, a solar controller, a vehicle controller, a charging port sensor, and a CAN communication interface. Among them:

[0046] The central processing unit (CPU) is used to obtain vehicle status information and determine the current operating conditions for intelligent distribution of electric energy. The central processing unit has high integration, strong data processing capabilities, and high control efficiency. In this embodiment, it undertakes the key tasks of data acquisition, logical judgment, electric energy distribution, and system control. It is the core of the all-in-one intelligent power replenishment control module. During specific implementation, other processors can also be flexibly selected according to actual conditions.

[0047] Distribution box, such as Figure 3 As shown, it includes a DCDC converter, a rectifier, and a relay; the rectifier is used to convert the AC power input by the AC charging port into DC power; the DCDC converter is used to convert the DC power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port into a suitable power battery charging voltage; there are multiple relays, which are respectively connected in series in the circuit of the fuel generator, solar panel, AC charging port, and DC fast charging port to supply power to the power battery through a high-voltage wiring harness; the control ends of the DCDC converter, rectifier, and relay are all connected to the central processing unit, wherein the DCDC converter can adjust the converted voltage according to the command of the central processing unit, the rectifier starts and stops according to the command of the central processing unit, and the relay turns on the corresponding power supply circuit according to the power distribution result of the central processing unit.

[0048] The power battery management system (BMS) is used to monitor the SOC, temperature, voltage and current data of the power battery.

[0049] Solar controller (MPPT controller), used to monitor the output voltage of solar panels.

[0050] The vehicle controller unit (VCU) is used to monitor the driving status of the vehicle (such as driving or stationary).

[0051] The charging port sensors are respectively arranged on the AC charging port and the DC fast charging port, and are used to monitor the charging current and voltage of the AC charging port and the DC fast charging port.

[0052] CAN communication interface, the central processor is connected to the power battery management system, solar controller, vehicle controller, and charging port sensor respectively through the CAN communication interface to obtain vehicle status information.

[0053] The intelligent power replenishment system of the present invention has a simple structure and is easy to deploy. It makes full use of various electric energies (solar panels, city electricity, DC charging piles, and engine power generation) to replenish power batteries, improving energy utilization while extending the endurance of new energy vehicles. At the same time, the all-in-one intelligent power replenishment control module is highly integrated, and while monitoring the status of each system equipment, it can achieve efficient and intelligent power distribution, ensuring that new energy vehicles can obtain the best energy replenishment solution under various working conditions.

[0054] At the same time, according to the above-mentioned intelligent charging system for new energy vehicles, this application also proposes an intelligent charging method for new energy vehicles, such as Figure 4 As shown, the method comprises the following steps:

[0055] Step S1, waking up the all-in-one intelligent power supply control module. The waking up conditions of the all-in-one intelligent power supply control module include:

[0056] When the vehicle is in the ON gear, the KLI5 hard-wired signal directly wakes up the all-in-one intelligent charging control module;

[0057] When the vehicle is in the OFF gear, and the voltage of the solar panel exceeds the first voltage threshold (set to 60V in this embodiment. It should be noted that the threshold provided in this embodiment is only for reference, and can be flexibly selected according to actual conditions during specific implementation, and will not be repeated later) and the duration exceeds the first time threshold (set to 1 minute in this embodiment), the all-in-one intelligent power replenishment control module is awakened. If any of the above conditions is met, the all-in-one intelligent power replenishment control module is awakened.

[0058] Step S2, the all-in-one intelligent charging control module obtains vehicle status information through CAN network messages, and the vehicle status information includes the SOC of the power battery, the output voltage of the solar panel, the driving status of the whole vehicle, and the charging current and voltage of the AC charging port or the DC fast charging port.

[0059] Step S3, the all-in-one intelligent power replenishment control module determines the current working condition according to the vehicle status information; under different working conditions, the all-in-one intelligent power replenishment control module intelligently distributes the output of the fuel generator, solar panel, AC charging port, and DC fast charging port to replenish the power battery. Specifically:

[0060] The operating conditions of this embodiment include a first operating condition, namely: the vehicle is in motion and the power battery SOC is lower than a first SOC threshold (set to 40% in this embodiment). At this time, starting the fuel generator prioritizes powering the vehicle drive motor to maintain vehicle driving, and the excess power is used to charge the power battery. At the same time, solar charging and external charging are prohibited to ensure driving safety, thereby ensuring that the vehicle can continue to drive in a low-battery state, and making full use of the excess power to replenish the power battery to extend the cruising range without wasting energy.

[0061] The working conditions of this embodiment include the second working condition, namely: the vehicle is stationary; and there is no external charging, that is, there is no current input to the DC charging port and the slow charging port; and the power battery SOC is less than the second SOC threshold (set to 95% in this embodiment); and the solar panel voltage is greater than the first voltage threshold (60V). At this time, the vehicle has no driving demand, and the solar panel is started to prioritize the power supply of the low-voltage equipment of the vehicle to ensure the normal operation of the on-board electronic equipment (such as lights, audio, navigation, etc.) to ensure user experience, and the excess power is used to charge the power battery to improve energy utilization.

[0062] The working condition of this embodiment includes the third working condition, that is, the vehicle is stationary and there is external charging, that is, there is current input to the DC charging port or the slow charging port. At this time, the solar charging port is closed, that is, the relay in the circuit that the solar panel supplies power to the power battery is closed. External charging has the highest priority, and the power battery is charged directly through the DC charging port or the slow charging port, thereby avoiding conflicts between solar charging and external charging and ensuring external charging efficiency.

[0063] The operating conditions of this embodiment include a fourth operating condition, namely: the vehicle is stationary; there is no external charging input; and the voltage of the solar panel is less than the first voltage threshold (60V) and the duration exceeds the first time threshold (1 minute). At this time, the vehicle has no driving demand and the solar power supply is insufficient. The all-in-one intelligent power replenishment control module enters a dormant state to avoid forced charging under low voltage conditions to protect the solar panel and the power battery, while reducing system power consumption and extending module life.

[0064] During the power battery charging process, the all-in-one intelligent power replenishment control module of this embodiment also detects the vehicle status in real time. When the power battery SOC is greater than the second SOC threshold (95%), and the solar panel voltage is less than the first voltage threshold (60V) and the duration exceeds the first time threshold (1 minute), and there is no external charging, that is, there is no current input to the DC charging port and the slow charging port, it means that the power battery has reached the power indicator and all power sources have stopped supplying power. Then the all-in-one intelligent power replenishment control module enters a sleep state to reduce unnecessary energy consumption and avoid overcharging, thereby extending the battery life.

[0065] In addition, under any working condition, the all-in-one intelligent power replenishment control module of this embodiment also determines whether the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery are faulty according to the vehicle status information, and immediately stops charging and issues an alarm when a fault occurs. For example, the central processor in the all-in-one intelligent power replenishment control module sets a fault threshold for each vehicle status data. When the detected vehicle status data exceeds the preset fault threshold, it is regarded as a corresponding device failure. At this time, the central processor can send the fault information to the vehicle display screen, or send it to the user's mobile terminal through remote communication means (such as TBOX, 5G technology, etc.), so as to promptly remind the user of the device failure, ensure system safety, and extend the life of the device.

[0066] The present invention ensures that electric energy is used for key equipment (such as drive motors and low-voltage equipment) first through intelligent allocation strategies under different working conditions, while replenishing the power battery. In addition, when the power battery is fully charged or the various power sources cannot effectively supply power, the all-in-one intelligent power replenishment control module is controlled to enter a dormant state. Overall, the present invention improves the overall energy utilization rate, while increasing battery life and reducing standby power consumption.

[0067] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An intelligent charging system for new energy vehicles, characterized in that: The system includes a fuel generator, a solar panel, an AC charging port, a DC fast charging port, an all-in-one intelligent power replenishment control module, a power battery, and a high-voltage wiring harness, wherein: the all-in-one intelligent power replenishment control module is connected to the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery through the high-voltage wiring harness, and is used to intelligently distribute the electric energy provided by the fuel generator, solar panel, AC charging port, and DC fast charging port to the power battery for charging according to different vehicle operating conditions.

2. According to claim 1, the intelligent charging system for new energy vehicles is characterized by: The all-in-one intelligent power replenishment control module includes: The central processing unit is used to obtain vehicle status information and determine the current working conditions for intelligent distribution of electric energy; A power distribution box, including a DCDC converter, a rectifier, and a relay. The rectifier is used to convert the AC power input from the AC charging port into DC power. The DCDC converter is used to convert the DC power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port into a power battery charging voltage. There are multiple relays, which are respectively connected in series in the circuit of the fuel generator, solar panel, AC charging port, and DC fast charging port to supply power to the power battery through a high-voltage wiring harness. The control ends of the DCDC converter, rectifier, and relay are all connected to the central processor. Power battery management system, used to monitor the SOC, temperature, voltage and current data of the power battery; Solar controller, which is used to monitor the output voltage of solar panels; The vehicle controller is used to monitor the driving status of the vehicle; Charging port sensors are respectively arranged on the AC charging port and the DC fast charging port, and are used to monitor the charging current and voltage of the AC charging port and the DC fast charging port; CAN communication interface, the central processor is connected to the power battery management system, solar controller, vehicle controller, and charging port sensor respectively through the CAN communication interface to obtain vehicle status information.

3. A method for intelligent charging of new energy vehicles according to an intelligent charging system for new energy vehicles according to any one of claims 1-2, characterized in that: The method comprises the following steps: Step S1, waking up the all-in-one intelligent power replenishment control module; Step S2, the all-in-one intelligent charging control module obtains vehicle status information through CAN network messages, and the vehicle status information includes the SOC of the power battery, the output voltage of the solar panel, the driving status of the whole vehicle, and the charging current and voltage of the AC charging port or the DC fast charging port; Step S3, the all-in-one intelligent power replenishment control module determines the current working condition according to the vehicle status information; under different working conditions, the all-in-one intelligent power replenishment control module intelligently distributes the output of the fuel generator, solar panel, AC charging port, and DC fast charging port to replenish the power battery.

4. The intelligent charging method for new energy vehicles according to claim 3 is characterized in that: In step S1, the wake-up conditions of the all-in-one intelligent power supply control module include: When the vehicle is in the ON gear, the KLI5 hard-wired signal directly wakes up the all-in-one intelligent charging control module; When the vehicle is in the OFF gear and the voltage of the solar panel exceeds the first voltage threshold and the duration exceeds the first time threshold, the all-in-one intelligent power replenishment control module is awakened.

5. The intelligent charging method for new energy vehicles according to claim 3 is characterized in that: The operating conditions include a first operating condition, namely: the vehicle is in motion and the power battery SOC is lower than a first SOC threshold. At this time, starting the fuel generator to power the vehicle drive motor first, and the excess power is used to charge the power battery. At the same time, solar charging and external charging are prohibited.

6. The intelligent charging method for new energy vehicles according to claim 3 is characterized in that: The operating conditions include a second operating condition, namely: the vehicle is stationary; there is no external charging, that is, there is no current input to the DC charging port and the slow charging port; the power battery SOC is less than the second SOC threshold; and the solar panel voltage is greater than the first voltage threshold. At this time, the solar panel is started to prioritize the power supply of the low-voltage equipment of the vehicle, and the excess power is used to charge the power battery.

7. The intelligent charging method for new energy vehicles according to claim 3 is characterized in that: The operating conditions include a third operating condition, namely: the vehicle is stationary; and there is external charging, that is, there is current input to the DC charging port or the slow charging port. At this time, the solar charging port is closed, and external charging has the highest priority to charge the power battery.

8. The intelligent charging method for new energy vehicles according to claim 3 is characterized in that: The operating conditions include a fourth operating condition, namely: the vehicle is stationary; there is no external charging input; and the solar panel voltage is less than the first voltage threshold and the duration exceeds the first time threshold. At this time, the all-in-one intelligent power replenishment control module enters a sleep state.

9. A new energy vehicle intelligent charging method according to claims 3-8, characterized in that: During the power battery charging process, the all-in-one intelligent power replenishment control module also detects the vehicle status in real time. When the power battery SOC is greater than the second SOC threshold, and the solar panel voltage is less than the first voltage threshold and the duration exceeds the first time threshold, and there is no external charging, that is, there is no current input to the DC charging port and the slow charging port, the all-in-one intelligent power replenishment control module enters a sleep state.

10. A new energy vehicle intelligent charging method according to claims 3-8, characterized in that: Under any operating condition, the all-in-one intelligent power replenishment control module also determines whether the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery are faulty based on the vehicle status information, and immediately stops charging and issues an alarm when a fault occurs.

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