New energy automobile headlamp intelligent light control system and automobile

Abstract

The utility model discloses a new energy automobile headlight intelligent light control system and an automobile, the control system comprises a vehicle-mounted lamp group used for emitting intelligent light, the control system further comprises an automobile body end CEM and an L IN communication module, the automobile body end CEM is connected to an LIN communication module through an L IN bus, and the LIN communication module is connected with the vehicle-mounted lamp group through a bus. The LIN communication module is connected to a control unit MCU for driving control in the vehicle-mounted lamp group; the vehicle body end CEM outputs a driving control signal and sends a lamp language function message to the control unit MCU for execution through the LIN bus, and the control unit MCU carries out driving control on LED lamps in the vehicle-mounted lamp set based on the received vehicle language function. The utility model has the advantages that the LIN communication is adopted to carry out communication control on the LED of the automobile lamp, so that the cost is low, and the whole automobile cost of the lamp part is reduced; and meanwhile, the vehicle body end CEM is adopted as a controller to carry out driving control on the vehicle lamp, and compared with a BCM control scheme, the cost is low, the lamp language function development is facilitated, and the development time period is shortened.

Description

Technical Field

[0001] The utility model relates to the field of intelligent light language and music rhythm control of new energy vehicles, and in particular to an intelligent light control system for headlights of new energy vehicles. Background Art

[0002] With the gradual strengthening of environmental awareness, new energy vehicles have become the development trend of the future automotive industry. Consumers have higher and higher requirements for the sensory quality of automobiles, such as "fineness" has become a consideration for consumers to buy cars, resulting in the front face of the whole car becoming more and more extreme. The headlights are the eyes of the car. The visual beauty of the headlights is directly related to the first impression of the whole car on the customer. The intelligent light language and music rhythm of the headlights have become the highlights of the major OEMs. However, due to the increasingly fierce competition in the industry and the pressure of the cost of the whole vehicle, the corresponding intelligent light language or music rhythm needs to be realized at a lower cost.

[0003] The conventional implementation method of intelligent light language and music rhythm in the current industry is to use the BCM controller on the vehicle body to control through CAN communication, including the regulatory functions. On the one hand, the internal processor requirements of CAN communication are complex and the chip requirements are high, resulting in high cost of the entire lamp; on the other hand, BCM controls the regulatory functions of the lamps through CAN communication software. Due to the long development cycle of the BCM software status, the BCM software is still constantly OTA upgrading after the vehicle is launched on the market. During the upgrade process, it is easy to cause the loss of various functional problems, resulting in the inability to realize the regulatory functions of the lamps.

[0004] For example, the welcome light control system and vehicle and the control method of the welcome light control system with patent application number 201811422573.8 use the body control system BCM to perform light drive control, which cannot solve the above-mentioned problem. Utility Model Content

[0005] The purpose of the utility model is to overcome at least one of the above-mentioned deficiencies of the prior art and to provide an intelligent lighting control system for new energy vehicle headlights, which uses CEM and LIN to drive and control the lights to solve at least one of the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a new energy vehicle headlight intelligent lighting control system, the control system includes a vehicle-mounted light group for emitting intelligent lights, the control system also includes a body-side CEM and a LIN communication module, the body-side CEM is connected to the LIN communication module via a LIN bus, and the LIN communication module is connected to the control unit MCU for drive control inside the vehicle-mounted light group; the body-side CEM outputs a drive control signal and sends the light language function message to the control unit MCU for execution via the LIN bus, and the control unit MCU drives and controls the LED lights in the vehicle-mounted light group based on the received car language function.

[0007] The power supply terminal of the vehicle body end CEM leads out power supply terminals to respectively power the control unit MCU and the LED lights of the vehicle-mounted light group.

[0008] The power supply terminal of the power supply end of the body-end CEM is connected to the constant current circuit, the BUCK-BOOST circuit, and the LDO circuit respectively through the PMOS anti-reverse input filter circuit; the constant current circuit outputs a constant current source to the high and low beam LED lights for power supply after passing through the output filter overvoltage detection circuit; the output end of the BUCK-BOOST circuit is connected to the linear drive circuit after passing through the output filter overvoltage detection circuit, and the output end of the linear drive circuit outputs a constant current source to the daytime running light LED, the turn signal LED, and the position light LED for power supply; the LDO circuit outputs a stable voltage to power the control unit MCU.

[0009] The input end of the control unit MCU is connected to the overvoltage and undervoltage detection circuit, and the overvoltage and undervoltage detection circuit is used to collect the output voltage of the PMOS anti-reverse input filter circuit; the output end of the control unit MCU is respectively connected to the constant current circuit and the BUCK-BOOST circuit.

[0010] An NTC thermistor is arranged at the high and low beam LED lamps, and the output end of the NTC thermistor is connected to the input end of the control unit MCU via an ADC module.

[0011] The control system further comprises a temperature acquisition module, which is used to acquire the temperature signal of the linear drive circuit, and the output end of the temperature acquisition module is sent to the input end of the control unit MCU after AD sampling.

[0012] The control unit MCU is connected to the linear drive circuit through a private CAN communication network.

[0013] The input end of the CEM is connected to the vehicle status acquisition module, which is used to respectively acquire the gear status and the four-door switch status of the vehicle.

[0014] The input end of the vehicle body end CEM is connected to the vehicle computer IHU for receiving control and setting signals of the vehicle computer IHU.

[0015] A new energy vehicle comprises the new energy vehicle headlight intelligent lighting control system.

[0016] The advantages of the utility model are: LIN communication is used to control the communication of the headlight LED, which is low in cost and reduces the vehicle cost of the light language part; at the same time, the body-side CEM is used as a controller to drive and control the headlight, which is low in cost and convenient for the development of light language functions and reduces the development time cycle compared to the BCM control scheme; a safe and reliable light language driving circuit is designed to ensure the stable and reliable operation of the LED lamp, meet the dual requirements of light language and lighting, and the driving circuit is simple, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0018] Figure 1 This is the structure diagram of the control system of the utility model;

[0019] Figure 2 This is a schematic diagram of the principle of driving LED lights in the control system of the utility model.

[0020] The Chinese and English translations in the above figure are:

[0021] LDO: Low Voltage Linear Regulator

[0022] CEM: Central Electronic Module

[0023] ADC: Analog-to-Digital Converter

[0024] NTC: Thermistor

[0025] HB:High Beam

[0026] LB:Low Beam

[0027] TL:Turn Light

[0028] PL: Position Lamp

[0029] DRL: Daytime running light (Daytime Runn i ng Light)

[0030] LED: Light Emitting Diode. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0032] Intelligent headlight control includes intelligent light language and music rhythm functions. This embodiment provides a new control strategy solution to meet the low-cost and high-safety headlight intelligent light language or music rhythm function control strategy solution. This application uses CEM to control vehicle lights to realize light language or music rhythm functions. At the same time, Lin communication is used between CEM and the MCU of the headlights, which solves the problems of high cost and complex development in the prior art. The solution adopted is that the body-side CEM is connected to the LIN communication module via the LIN bus, and the LIN communication module is connected to the control unit MCU for drive control inside the vehicle light group; the body-side CEM outputs the drive control signal and sends the light language function message to the control unit MCU for execution via the LIN bus. The control unit MCU drives and controls the LED lights in the vehicle light group based on the received car language function. The power supply terminal of the body-side CEM leads to the power supply terminals to supply power to the control unit MCU and the LED lights of the vehicle light group respectively. The power supply terminal of the power supply end of the CEM at the vehicle body end is connected to the constant current circuit, BUCK-BOOST circuit, and LDO circuit respectively through the PMOS anti-reverse input filter circuit; the constant current circuit outputs a constant current source to the high and low beam LED lights for power supply after passing through the output filter overvoltage detection circuit; the output end of the BUCK-BOOST circuit is connected to the linear drive circuit after passing through the output filter overvoltage detection circuit, and the output end of the linear drive circuit outputs a constant current source to the daytime running light LED, turn signal LED, and position light LED for power supply; the LDO circuit outputs a stable voltage to power the control unit MCU. The input end of the control unit MCU is connected to the overvoltage and undervoltage detection circuit, and the overvoltage and undervoltage detection circuit is used to collect the output voltage of the PMOS anti-reverse input filter circuit; the output end of the control unit MCU is connected to the constant current circuit and the BUCK-BOOST circuit respectively. An NTC thermistor is provided at the high and low beam LED lights, and the output end of the NTC thermistor is connected to the input end of the control unit MCU through the ADC module. The temperature acquisition module is used to collect the temperature signal of the linear drive circuit, and its output end is sent to the input end of the control unit MCU after AD sampling. The specific implementation method of this scheme is introduced in conjunction with the accompanying drawings as follows:

[0033] like Figure 1 , 2As shown, an intelligent lighting control system for new energy vehicle headlights includes an on-board light group for emitting intelligent lights. By driving the LED lights in the on-board light group to realize the light function, the light language function and the music rhythm function can also be realized. The on-board light group can be classified into LB, HB, TL, DRL, PL, etc. according to the function. Each type of light corresponds to a plurality of LED lights, and the light language function can be realized by driving these LED lights. In this embodiment, the driving of these LED lights is controlled by the body-end CEM. During the driving control, each LED light of the on-board light group is powered based on the body-end CEM, and at the same time, the control unit MCU corresponding to the driving circuit in the on-board light group is powered and the corresponding light language function instructions are sent, thereby realizing the light language function. Figure 1 , 2 In the process, the LIN communication function of the CEM on the vehicle side sends the information corresponding to the light language function to the control unit MCU in the vehicle light group driver board through the LIN bus. The CEM on the vehicle side is connected to the LIN chip through the LIN bus, and is connected to the control unit MCU after conversion by the LIN chip, so as to send the corresponding light language function in the CEM to the MCU for execution. The LIN chip uses the TJA1021 chip to realize the conversion and transmission of the LIN signal. The control unit MCU is the core of the driver board, which is used to monitor the LED lights in the vehicle light group and is implemented by the S9KEAZ128A chip.

[0034] The power supply of the LED lights in the vehicle lighting group is drawn from the CEM on the vehicle body, and after conversion by the circuit in the driver board and monitoring by the MCU, it provides power for the operation of the LED lights. Figure 2As shown, the power source led out from the CEM at the vehicle body end passes through the PMOS anti-reverse input filter circuit and then outputs the filtered power supply; wherein the PMOS anti-reverse input filter circuit utilizes the diode in the PMOS for anti-reverse protection, and the filtering generally adopts conventional capacitor filtering to avoid large voltage fluctuations; the voltage outputted from the output end of the PMOS anti-reverse input filter circuit is respectively sent to the SEP IC constant current circuit, the BUCK-BOOST circuit and the LDO circuit; wherein the LDO is a linear voltage regulator chip, which is used to generate a +5V power supply voltage, and the voltage power supply respectively provides a +5V power supply for the MCU, LIN chip and private CAN in the driver board. The SEPI C constant current circuit is implemented by TPS92682 chip, which is used to process the input current to form a constant current source. The output end of the SEPI C constant current circuit is sent to the LED lights corresponding to LB and HB for power supply after the output filter overvoltage detection, so as to realize the high and low beam lighting control; wherein the output filter overvoltage detection circuit includes an output filter circuit and an overvoltage detection circuit, wherein the output filter can be realized by conventional capacitor filtering, and the overvoltage detection uses a voltage divider resistor to collect voltage or a voltage transformer to collect voltage signals and send them to the MCU for monitoring and control. The BUCK-BOOST circuit is implemented by TPS55288 chip, and the input voltage is sent to the linear drive after the voltage is buck-boost converted and the output filter overvoltage detection is passed. The output end of the linear drive circuit outputs a constant current source to the corresponding LEDs such as TL, DRL, and PL to provide power for their operation. At this time, the designed output filter overvoltage detection circuit includes an output filter circuit and an overvoltage detection circuit, wherein the output filter can be realized by conventional capacitor filtering, and the overvoltage detection uses a voltage divider resistor to collect voltage or a voltage transformer to collect voltage signals and send them to the MCU for monitoring and control. The linear drive circuit is implemented using the NSL21912 chip. Since the MCU monitors the output voltages of the SEP IC constant current circuit and the BUCK-BOOST circuit respectively, the MCU can adjust and control the SEP IC constant current circuit and the BUCK-BOOST circuit according to the monitored output voltage to ensure the stability and reliability of the voltage output. The MCU is connected to the control end of the BUCK-BOOST circuit through the SPI bus and to the control end of the SEP IC constant current circuit through the I 2C bus. The output voltage is adjusted and controlled through SPI and I 2C according to the monitored output voltage to meet the stability and reliability of the output power supply. The linear drive module can also adjust the output constant current source. The present application establishes a connection relationship with the linear drive by means of a private CAN, that is, the MCU establishes communication with the private CAN of the vehicle-mounted light group end through the private CAN, and the private CAN is connected to the linear drive, thereby realizing CAN communication between the MCU and the linear drive circuit.

[0035] The output voltage of the PMOS anti-reverse input filter circuit also needs to be detected for overvoltage and undervoltage to avoid hidden dangers of lighting control caused by voltage problems. Therefore, an overvoltage and undervoltage detection circuit is set to monitor the output of the PMOS anti-reverse input filter circuit. Resistor voltage division, voltage transformer, etc. can be used to realize overvoltage and undervoltage detection. The output end of the overvoltage and undervoltage detection circuit is connected to the MCU, which monitors and uploads it to the vehicle human-computer interaction I HU for reminder or control.

[0036] At the same time, in order to further improve the normal operation of the LED lamp when the light language function is implemented, an NTC thermistor is set at the LED lamp or the driver chip in the vehicle lamp group to monitor the temperature, such as Figure 2 As shown, NTC is used to collect the temperature of the LEDs corresponding to LB and HB, and NTC is used to collect the temperature at the linear drive module. The temperature output by NTC is an analog signal that cannot be directly transmitted to the MCU. Therefore, an ADC detection module is provided to convert the analog data into digital data and then send it to the MCU for monitoring and processing.

[0037] The light language function generally gives a light effect when the vehicle performs human-machine interaction, such as unlocking, fortifying, and searching for the vehicle. Therefore, the input end of the CEM is connected to the vehicle status acquisition module, which is used to acquire the gear status and four-door switch status of the vehicle. The vehicle status acquisition module acquires the actual gear status and four-door switch status through the VCU and four-door locks. Figure 1 As shown, the input end of the CEM on the vehicle body is connected to the vehicle IHU, which is used to receive the control and setting signals of the vehicle IHU, as well as the display of the light language function setting signals and the light language status feedback signals. The MIC is a microphone, which is connected to the sub-IHU, and can turn the light language on and off by voice, and the setting signal is sent to the IHU for execution. Figure 1 As shown, the setting and processing of light language are respectively in IHU and CEM. CEM is connected to various car lights to drive the corresponding lighting of the car lights, thereby realizing the light language, and the gear position and four-door switch status are one of the conditions for starting the light language.

[0038] In a preferred embodiment, the present application also provides a new energy vehicle, which includes the new energy vehicle headlight intelligent lighting control system in the above embodiment.

[0039] In this solution, the use of CEM for the development of the light language function and the use of LIN communication greatly saves costs and the development and implementation of the light language function of the entire vehicle. The hardware structure is simple and reliable with low cost; and the hardware-adapted software is easy to develop, which also shortens the development cycle to a certain extent. In this solution, the high and low beam functions in the headlights are powered by the CEM on the body side. After anti-reverse, filtering, and over- and under-voltage detection, the dual-channel chip adjusts to obtain a stable constant current source to drive the LED. For the daytime steering position part, it also first passes through anti-reverse, filtering, and over- and under-voltage detection, and then uses the BUCK-BOOST circuit to adjust the voltage. The obtained voltage is used to power the linear chip, and the linear chip provides a constant current source to the LED to achieve various functional effects. For the intelligent light language or music rhythm function, the CEM on the body side provides various function message signals through the LIN bus to drive the internal MCU of the headlight to execute the intelligent light language function;

[0040] The LIN communication control strategy is adopted. Although the transmission speed is lower than the CAN signal transmission, the control of the intelligent light language under fixed music is completely unaffected through testing and verification. At the same time, the hard-wired method controls the regulatory functions, which reduces the interference of the lamp regulatory functions when the after-sales CEM flashes the software, and avoids vehicle safety accidents caused by lighting problems. In addition, the internal control logic of LIN communication is simpler than that of CAN communication, and the price of the driving circuit and chip in the lamp is much lower than that of CAN communication, so the whole vehicle can achieve the goal of cost reduction.

[0041] 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, they are all within the protection scope of the present invention.

Claims

1. An intelligent lighting control system for new energy vehicle headlights, the control system comprising a vehicle-mounted light group for emitting intelligent lights, characterized in that: The control system also includes a body-side CEM and a LIN communication module. The body-side CEM is connected to the LIN communication module via a LIN bus, and the LIN communication module is connected to the control unit MCU for drive control inside the vehicle-mounted light group. The body-side CEM outputs a drive control signal and sends the light language function message to the control unit MCU via the LIN bus for execution. The control unit MCU drives and controls the LED lights in the vehicle-mounted light group based on the received car language function.

2. The intelligent lighting control system for new energy vehicle headlights as claimed in claim 1, characterized in that: The power supply terminal of the vehicle body end CEM leads out power supply terminals to respectively power the control unit MCU and the LED lights of the vehicle-mounted light group.

3. The intelligent lighting control system for new energy vehicle headlights as claimed in claim 2, characterized in that: The power supply terminal of the power supply end of the body-end CEM is connected to the constant current circuit, the BUCK-BOOST circuit, and the LDO circuit respectively through the PMOS anti-reverse input filter circuit; the constant current circuit outputs a constant current source to the high and low beam LED lights for power supply after passing through the output filter overvoltage detection circuit; the output end of the BUCK-BOOST circuit is connected to the linear drive circuit after passing through the output filter overvoltage detection circuit, and the output end of the linear drive circuit outputs a constant current source to the daytime running light LED, the turn signal LED, and the position light LED for power supply; the LDO circuit outputs a stable voltage to power the control unit MCU.

4. The intelligent lighting control system for new energy vehicle headlights as claimed in claim 3, characterized in that: The input end of the control unit MCU is connected to the overvoltage and undervoltage detection circuit, and the overvoltage and undervoltage detection circuit is used to collect the output voltage of the PMOS anti-reverse input filter circuit; the output end of the control unit MCU is respectively connected to the constant current circuit and the BUCK-BOOST circuit.

5. The intelligent lighting control system for new energy vehicle headlights as claimed in claim 3 or 4, characterized in that: An NTC thermistor is arranged at the high and low beam LED lamps, and the output end of the NTC thermistor is connected to the input end of the control unit MCU via an ADC module.

6. A new energy vehicle headlight intelligent lighting control system as claimed in claim 3 or 4, characterized in that: The control system further comprises a temperature acquisition module, which is used to acquire the temperature signal of the linear drive circuit, and the output end of the temperature acquisition module is sent to the input end of the control unit MCU after AD sampling.

7. The intelligent lighting control system for new energy vehicle headlights as claimed in claim 3 or 4, characterized in that: The control unit MCU is connected to the linear drive circuit through a private CAN communication network.

8. An intelligent lighting control system for new energy vehicle headlights as described in any one of claims 1 to 4, characterized in that: The input end of the CEM is connected to the vehicle status acquisition module, which is used to respectively acquire the gear status and the four-door switch status of the vehicle.

9. An intelligent lighting control system for new energy vehicle headlights as described in any one of claims 1 to 4, characterized in that: The input end of the vehicle body end CEM is connected to the vehicle computer IHU for receiving control and setting signals of the vehicle computer IHU.

10. A new energy vehicle, characterized in that: The new energy vehicle includes the new energy vehicle headlight intelligent lighting control system as described in any one of claims 1-9.

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