A new energy vehicle intelligent power supplementing system and method

Abstract

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

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of new energy vehicles, and in particular, the present application relates to a new energy vehicle intelligent power supplementing system and method. BACKGROUND

[0002] In recent years, electric vehicles have developed rapidly, and battery power supplementing 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 industry, and has increased investment and construction of electric vehicle charging infrastructure. On the other hand, we also need to broaden the types of power supplementing energy, reduce power loss, and achieve longer range and more energy saving.

[0003] In the prior art, the power supplementing method for electric vehicles is relatively single. For example, the publication number is CN109367433A, the publication date is February 22, 2019, and the patent name is "Intelligent charging pile with power battery health state detection and endurance mileage prediction and method": an intelligent charging pile with power battery health state detection and endurance mileage prediction, comprising a charging pile main body, the charging pile main body comprises: a data acquisition module: reading and collecting power battery data and state data during charging and storing, and sending the obtained data to the battery health state detection module; a battery health state detection module: detecting the health degree of the power battery to obtain the health degree of the currently charged power battery, predicting the endurance mileage of the power battery to obtain the endurance mileage of the currently charged power battery, and sending the obtained health degree and endurance mileage to the touchable display module and the charging control module; a touchable display module: displaying the health degree and endurance mileage obtained by the battery health state detection module, and realizing human-computer interaction operation with the user; a charging control module: charging the power battery according to the detected health degree.

[0004] The above publication only uses a charging pile to charge the power battery, and lacks diversity. The advantages of new energy vehicles are not only energy saving, but also green environmental protection, and not only low energy cost, but also the diversity of electric energy. Any known energy can be converted into unified electric energy for human use, so that the electric energy source of the electric vehicle can be supplied by a variety of energy, and applied to various vehicle working conditions through intelligent distribution strategy, so as to ensure that the battery increases the endurance under the same capacity. Therefore, the present application proposes a new energy vehicle intelligent power supplementing system and method. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and proposes a new energy vehicle intelligent power supplementing system and method to achieve the following purposes: using multiple electric energy to intelligently supplement power to the power battery under different working conditions, to improve energy utilization, increase endurance, and reduce standby power consumption.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is as follows: a new energy vehicle intelligent power supplementing system, the system comprising a fuel generator, a solar panel, an alternating current charging port, a direct current fast charging port, a multi-in-one intelligent power supplementing control module, a power battery and a high-voltage wire harness, wherein the multi-in-one intelligent power supplementing control module is connected with the fuel generator, the solar panel, the alternating current charging port, the direct current fast charging port and the power battery through the high-voltage wire harness respectively, and is used for intelligently distributing the electric energy provided by the fuel generator, the solar panel, the alternating current charging port and the direct current fast charging port to the power battery according to different working conditions of the vehicle.

[0007] Preferably, the multi-in-one intelligent power supplementing control module comprises:

[0008] a central processing unit, which is used for acquiring vehicle state information and judging a current working condition to perform intelligent electric energy distribution;

[0009] a power distribution box comprising a DC / DC converter, a rectifier and a plurality of relays, the rectifier is used for converting alternating current input by the alternating current charging port into direct current, the DC / DC converter is used for converting direct current provided by the fuel generator, the solar panel, the alternating current charging port and the direct current fast charging port into power battery charging voltage, and the plurality of relays are respectively connected in series in loops in which the fuel generator, the solar panel, the alternating current charging port and the direct current fast charging port supply power to the power battery through the high-voltage wire harness, and control ends of the DC / DC converter, the rectifier and the relays are connected with the central processing unit;

[0010] a power battery management system, which is used for monitoring SOC, temperature, voltage and current data of the power battery;

[0011] a solar controller, which is used for monitoring output voltage of the solar panel;

[0012] a vehicle controller, which is used for monitoring a driving state of the vehicle;

[0013] charging port sensors, which are respectively arranged on the alternating current charging port and the direct current fast charging port, and are used for monitoring charging current and voltage of the alternating current charging port and the direct current fast charging port;

[0014] a CAN communication interface, the central processing unit is connected with the power battery management system, the solar controller, the vehicle controller and the charging port sensors through the CAN communication interface to acquire vehicle state information.

[0015] Meanwhile, the present application also proposes a new energy vehicle intelligent power supplementing method according to the above new energy vehicle intelligent power supplementing system, the method comprising the following steps:

[0016] step S1, waking up the multi-in-one intelligent power supplementing control module;

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

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

[0019] Preferably, in the step S1, the wake-up conditions of the all-in-one intelligent power compensation control module include:

[0020] When the vehicle is in the ON gear, the KLI5 hard-wire signal directly wakes up the all-in-one intelligent power compensation 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 compensation control module is woken up.

[0022] Preferably, the working condition includes a first working condition, i.e., the vehicle is in driving and the SOC of the power battery is lower than the first SOC threshold, at this time, the fuel generator is started to preferentially supply power to the vehicle driving motor, the excess power is used to charge the power battery, and the solar charging and external charging are prohibited.

[0023] Preferably, the working condition includes a second working condition, i.e., the vehicle is in a static state, there is no external charging, i.e., no current input of the DC charging port or the slow charging port, the SOC of the power battery is less than the second SOC threshold, and the voltage of the solar panel is greater than the first voltage threshold, at this time, the solar panel is started to preferentially maintain power supply of the low-voltage equipment of the vehicle, and the excess power is used to charge the power battery.

[0024] Preferably, the working condition includes a third working condition, i.e., the vehicle is in a static state, and there is external charging, i.e., there is current input of the DC charging port or the slow charging port, at this time, the solar charging port is closed, the external charging has the highest priority, and the power battery is charged.

[0025] Preferably, the working condition includes a fourth working condition, i.e., the vehicle is in a static state, there is no external charging input, and the voltage of the solar panel is less than the first voltage threshold and the duration exceeds the first time threshold, at this time, the all-in-one intelligent power compensation control module enters a sleep state.

[0026] Preferably, during the charging of the power battery, the all-in-one intelligent power compensation control module also detects the vehicle state in real time, when the power battery SOC is greater than the second SOC threshold, the solar panel voltage is less than the first voltage threshold, the duration exceeds the first time threshold, and there is no external charging, i.e. no current input from the DC charging port or the slow charging port, the all-in-one intelligent power compensation control module enters a dormant state.

[0027] Preferably, under any working condition, the all-in-one intelligent power compensation control module also determines whether the fuel generator, the solar panel, the AC charging port, the DC fast charging port, or the power battery has failed according to the vehicle state information, and stops charging and sends an alarm immediately when a failure occurs.

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

[0029] (1) The intelligent power compensation system of the present application has a simple structure and is easy to lay out, and fully utilizes various electric energy (solar panels, mains, DC charging piles, and engine power generation) to compensate for the power battery, thereby improving energy utilization and prolonging the endurance of new energy vehicles.

[0030] (2) The all-in-one intelligent power compensation control module of the present application is highly integrated, and can realize efficient and intelligent electric energy distribution while monitoring the state of each system device, thereby ensuring that new energy vehicles can obtain the best energy compensation scheme under various working conditions. At the same time, faults can be found and reported in a timely manner, thereby ensuring system safety and prolonging device life.

[0031] (3) The method of the present application ensures that electric energy is preferentially used for key devices (such as drive motors and low-voltage devices), while supplementing the power of the power battery, thereby improving overall energy utilization. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a schematic structural diagram of a new energy vehicle intelligent power compensation system according to an embodiment of the present application;

[0033] Figure 2 FIG. 2 is a schematic structural diagram of an all-in-one intelligent power compensation control module according to an embodiment of the present application;

[0034] Figure 3 FIG. 3 is a schematic structural diagram of a power distribution box according to an embodiment of the present application;

[0035] Figure 4 FIG. 4 is a flowchart of a new energy vehicle intelligent power compensation method according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application are further described in detail below with the accompanying drawings and the description of the embodiments, which aims to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present application, and to help its implementation. It should be noted that the terms "first", "second" and the like in the present application are only for the convenience of describing the technical solutions to distinguish different components, and do not limit the present application. In order to make the technical solutions of the present application more clear, the present application is explained and described by the following embodiments.

[0037] The present embodiment provides a new energy vehicle intelligent power supplement system, as shown in Figure 1 The system comprises a fuel generator, a solar panel, an alternating current charging port, a direct current fast charging port, a multi-in-one intelligent power supplement control module, a power battery and a high-voltage wire harness, wherein the multi-in-one intelligent power supplement control module is connected with the fuel generator, the solar panel, the alternating current charging port, the direct current fast charging port and the power battery through the high-voltage wire harness respectively.

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

[0039] 1. Fuel generator: a device for converting petrochemical energy into electric energy, with a voltage of about 60V.

[0040] 2. Solar panel: a device for converting solar energy into electric energy, with a voltage of about 60-120V.

[0041] 3. Alternating current charging port: a device for connecting to the mains.

[0042] 4. Direct current fast charging port: a device for connecting to a direct current charging pile.

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

[0044] 6. High-voltage wire harness: a device for connecting various components for energy transmission.

[0045] 7. Multi-in-one intelligent power supplement control module: a device for intelligently distributing the electric energy provided by the fuel generator, the solar panel, the alternating current charging port and the direct current fast charging port to the power battery according to different working conditions of the vehicle. The multi-in-one intelligent power supplement control module of the present embodiment comprises a central processing unit, a power distribution box, a power battery management system, a solar controller, a vehicle control unit, a charging port sensor and a CAN communication interface, as shown in Figure 2

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

[0047] Distribution box, such as Figure 3 As shown, the system includes a DC-DC converter, a rectifier, and relays. The rectifier converts the AC power input from the AC charging port into DC power. The DC-DC converter converts the DC power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port into a suitable charging voltage for the power battery. Multiple relays are connected in series in the circuit where the fuel generator, solar panel, AC charging port, and DC fast charging port supply power to the power battery via a high-voltage wiring harness. The control terminals of the DC-DC converter, rectifier, and relays are all connected to the central processing unit (CPU). The DC-DC converter can adjust the converted voltage according to commands from the CPU, the rectifier can start and stop according to commands from the CPU, and the relays can activate the corresponding power supply circuits according to the power allocation results from the CPU.

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

[0049] A solar power controller (MPPT controller) is used to monitor the output voltage of solar panels.

[0050] The vehicle control unit (VCU) is used to monitor the vehicle's driving status (e.g., moving or stationary).

[0051] Charging port sensors are respectively installed on the AC charging port and the DC fast charging port to monitor the charging current and voltage of the AC charging port and the DC fast charging port.

[0052] The central processing unit connects to the power battery management system, solar controller, vehicle controller, and charging port sensor via the CAN communication interface to obtain vehicle status information.

[0053] The intelligent charging system of this invention has a simple structure and is easy to deploy. It makes full use of various electrical energy sources (solar panels, mains power, DC charging piles, and engine power generation) to charge the power battery, improving energy utilization while extending the range of new energy vehicles. Meanwhile, the highly integrated multi-functional intelligent charging control module monitors the status of various system devices and enables efficient and intelligent power distribution, ensuring that new energy vehicles receive the best energy replenishment solution under various operating conditions.

[0054] Meanwhile, according to the intelligent power supplement system for a new energy vehicle, the application further provides an intelligent power supplement method for a new energy vehicle, as shown in the following. Figure 4 The method comprises the following steps:

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

[0056] When the vehicle is in the ON gear, the KLI5 hard-wire signal directly wakes up the all-in-one intelligent power supplement control module.

[0057] When the vehicle is in the OFF gear, and the voltage of the solar panel exceeds the first voltage threshold (in this embodiment, it is set to 60V. It should be noted that the threshold provided in this embodiment is only for reference, and the specific implementation can be flexibly selected according to the actual situation, and subsequent details will not be described again) and the duration exceeds the first time threshold (in this embodiment, it is set to 1 minute), the all-in-one intelligent power supplement control module is woken up. Any of the above conditions is met, and the all-in-one intelligent power supplement control module is woken up.

[0058] Step S2, the all-in-one intelligent power supplement control module obtains vehicle state information through CAN network messages, and the vehicle state information includes the SOC of the power battery, the output voltage of the solar panel, the driving state of the vehicle, 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 supplement control module determines the current working condition according to the vehicle state information; in different working conditions, the all-in-one intelligent power supplement control module intelligently distributes the output of the fuel generator, the solar panel, the AC charging port and the DC fast charging port to the power battery for power supplement. Specifically:

[0060] The working condition of this embodiment includes a first working condition, that is, the vehicle is driving and the SOC of the power battery is lower than the first SOC threshold (in this embodiment, it is set to 40%), at this time, the fuel generator is started to preferentially supply power to the vehicle driving motor to maintain the vehicle driving, the excess power is used to charge the power battery, and the solar charging and external charging are prohibited to ensure driving safety, so as to ensure that the vehicle can continue to drive in a low power state, and make full use of the excess power to supplement the power of the power battery to prolong the cruising range and not waste energy.

[0061] The working condition of the embodiment includes a second working condition, i.e., the vehicle is in a static state; and there is no external charging, i.e., no current input of the direct current charging port or the slow charging port; and the power battery SOC is less than a second SOC threshold (95% in the embodiment); and the solar cell panel voltage is greater than a first voltage threshold (60V), at this time, the vehicle has no driving demand, the solar cell panel is started to preferentially maintain the power supply of the low-voltage equipment of the vehicle, to ensure the normal operation of the vehicle-mounted electronic equipment (such as lights, sound, navigation, etc.) to ensure the user experience, and the excess power is used to charge the power battery, to improve the energy utilization rate.

[0062] The working condition of the embodiment includes a third working condition, i.e., the vehicle is in a static state; and there is external charging, i.e., there is current input of the direct current charging port or the slow charging port, at this time, the solar charging port is closed, i.e., the relay in the loop in which the solar cell panel supplies power to the power battery is closed. The external charging has the highest priority, and directly charges the power battery through the direct current charging port or the slow charging port, so as to avoid the conflict between the solar charging and the external charging, and ensure the external charging efficiency.

[0063] The working condition of the embodiment includes a fourth working condition, i.e., the vehicle is in a static state; and there is no external charging input; and the solar cell panel voltage is less than the first voltage threshold (60V) while 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 compensation control module enters a sleep state, to avoid forcibly charging under the condition of low voltage to protect the solar cell panel and the power battery, and at the same time, the system power consumption can be reduced, and the module life is prolonged.

[0064] In the power battery charging process, the all-in-one intelligent power compensation control module of the embodiment also detects the vehicle state in real time, when the power battery SOC is greater than the second SOC threshold (95%), the solar cell panel voltage is less than the first voltage threshold (60V) while the duration exceeds the first time threshold (1 minute), and there is no external charging, i.e., no current input of the direct current charging port or the slow charging port, at this time, it is indicated that the power battery has reached the power index, and each power supply also stops power supply, then the all-in-one intelligent power compensation control module enters a sleep state to reduce unnecessary energy consumption and avoid overcharging, and prolong the battery life.

[0065] In addition, under any working condition, the all-in-one intelligent power supplement control module of the embodiment further judges whether the fuel generator, the solar panel, the AC charging port, the DC fast charging port and the power battery have faults according to the vehicle state information, and stops charging and sends an alarm immediately when a fault occurs. For example, the central processor in the all-in-one intelligent power supplement control module is provided with a fault threshold for each vehicle state data, when the detected vehicle state data exceeds the preset fault threshold, it is considered that the corresponding device has a fault, at this time, the central processor can send the fault information to the vehicle-mounted display screen, or send it to the user's mobile terminal through remote communication means (such as TBOX, 5G technology, etc.), so as to timely remind the user of the device fault, ensure the system safety, and prolong the service life of the device.

[0066] The present application ensures that the electric energy is preferentially used for key devices (such as driving motor and low-voltage device) and at the same time supplements the power of the power battery through intelligent distribution strategy under different working conditions. In addition, when the power of the power battery is sufficient or each power supply cannot effectively supply power, the all-in-one intelligent power supplement control module is controlled to enter the sleep state. Overall, the present application improves the overall energy utilization rate, at the same time can increase the endurance, and reduce the standby power consumption.

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

Claims

1. A method for intelligent charging of new energy vehicles, characterized in that: The method includes the following steps: Step S1: Wake 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. The vehicle status information includes the SOC of the power battery, the output voltage of the solar panel, the driving status of the vehicle, and the charging current and voltage of the AC charging port or DC fast charging port. Step S3: The all-in-one intelligent charging control module determines the current operating condition based on the vehicle status information; under different operating conditions, the all-in-one intelligent charging control module intelligently allocates the output of the fuel generator, solar panel, AC charging port, and DC fast charging port to charge the power battery; The operating conditions include the first operating condition, namely: the vehicle is in motion and the SOC of the power battery is lower than the first SOC threshold. At this time, the fuel generator is started to give priority to powering the vehicle drive motor, and the excess power is used to charge the power battery. At the same time, solar charging and external charging are prohibited. The operating conditions include the second operating condition, namely: the vehicle is stationary; there is no external charging, that is, no current input to the DC charging port and the slow charging port; the SOC of the power battery is less than the second SOC threshold; and the voltage of the solar panel is greater than the first voltage threshold. At this time, the solar panel is activated to prioritize the power supply to the low-voltage equipment of the vehicle, and the excess power is used to charge the power battery. The operating conditions include the third operating condition, namely: the vehicle is stationary and there is external charging, that is, there is current input at the DC charging port or slow charging port. At this time, the solar charging port is turned off, and the external charging has the highest priority to charge the power battery. The operating conditions 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 and the duration exceeds the first time threshold. At this time, the all-in-one intelligent charging control module enters a sleep state. During the charging process of the power battery, the all-in-one intelligent charging control module also monitors 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 for a duration exceeding the first time threshold, and there is no external charging, that is, no current input to the DC charging port or the slow charging port, the all-in-one intelligent charging control module enters a sleep state.

2. The intelligent charging method for new energy vehicles according to claim 1, characterized in that: In step S1, the wake-up conditions for the all-in-one intelligent power replenishment control module include: When the vehicle is in the ON position, the KLI5 hard-wire signal directly wakes up the all-in-one intelligent power replenishment control module. When the vehicle is in the OFF position, 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 charging control module is activated.

3. A method for intelligent charging of new energy vehicles according to claim 1 or 2, characterized in that: Under any operating condition, the all-in-one intelligent charging control module also determines whether the fuel generator, solar panel, AC charging port, DC fast charging port, and power battery are malfunctioning based on the vehicle status information, and immediately stops charging and issues an alarm when a malfunction occurs.

4. A smart charging system for new energy vehicles, using the smart charging method for new energy vehicles according to any one of claims 1-3, characterized in that: The system includes a fuel generator, a solar panel, an AC charging port, a DC fast charging port, a multi-functional intelligent charging control module, a power battery, and a high-voltage wiring harness. The multi-functional intelligent charging 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 electrical 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.

5. The intelligent charging system for new energy vehicles according to claim 4, characterized in that: The all-in-one intelligent power replenishment control module includes: The central processing unit is used to acquire vehicle status information and determine the current operating conditions in order to intelligently allocate electrical energy. The power distribution box includes a DC-DC converter, a rectifier, and relays. The rectifier converts the AC power input from the AC charging port into DC power. The DC-DC converter converts the DC power provided by the fuel generator, solar panel, AC charging port, and DC fast charging port into the charging voltage for the power battery. Multiple relays are connected in series in the circuit where the fuel generator, solar panel, AC charging port, and DC fast charging port supply power to the power battery via a high-voltage wiring harness. The control terminals of the DC-DC converter, rectifier, and relays are all connected to the central processing unit. The power battery management system is used to monitor the SOC, temperature, voltage and current data of the power battery. A solar controller is used to monitor the output voltage of solar panels; The vehicle controller is used to monitor the driving status of the entire vehicle. Charging port sensors are respectively installed on the AC charging port and the DC fast charging port to monitor the charging current and voltage of the AC charging port and the DC fast charging port. The central processing unit connects to the power battery management system, solar controller, vehicle controller, and charging port sensor via the CAN communication interface to obtain vehicle status information.

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