Electric vehicle light control system

Abstract

The utility model discloses an electric vehicle light control system, relates to electronic circuit technical field, including light sensation module, headlamp module and combination switch module, wherein the headlamp module includes MCU, dipped headlight LED1, dipped headlight drive unit, front position lamp LED2 and position lamp signal detection unit, and the combination switch module includes MCU, dipped headlight LED1, dipped headlight drive unit, front position lamp LED2, position lamp signal detection unit. A light sensing signal detection pin of the MCU is connected with the light sensing module, a driving signal output pin of the MCU is connected with the dipped headlight LED1 through the dipped headlight driving unit, and the dipped headlight LED1 is connected with the combined switch module; a first position lamp signal detection pin and a second position lamp signal detection pin of the MCU are connected with a position lamp signal detection unit, and the position lamp signal detection unit is connected with a front position lamp LED 2 and a combined switch module. The control system can avoid the problems that the automatic headlamp function of the electric vehicle is started by mistake and lamplight is inconvenient to use in a dark light environment, and the accuracy and convenience of lamplight control of the electric vehicle are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a lighting control system for an electric vehicle. Background Art

[0002] With the rapid development of the two-wheeled vehicle industry, the lighting fixtures of electric two-wheeled vehicles have become more user-friendly. From the initial need for manual switching to light up, some of the current lamps can automatically light up according to the ambient light, that is, the automatic headlight function. According to market research, many headlights currently use the position light gear as the switch for the automatic headlight function or the power supply for the automatic headlight function. The automatic headlight refers to the low beam headlight controlled by the light sensor signal when the automatic headlight function is turned on. Using the position light gear as the switch for the automatic headlight function means that the automatic headlights can only be automatically lit when the position lights are turned on, and the position lights cannot be controlled separately. This brings a series of problems in practical applications, such as:

[0003] (1) When the switch is turned to the position light position, the automatic headlight function of the entire vehicle is also turned on. Therefore, in the shade of trees, it is not possible to turn on only the position lights; once the position lights are turned on, the low beam headlights may also be mistakenly turned on due to the reduced light in the shade of trees.

[0004] (2) When all lights are off and you suddenly enter a dark environment, you must manually turn on the position light switch to automatically turn on the low beam. Utility Model Content

[0005] In response to the above problems and technical requirements, the applicant has proposed an electric vehicle lighting control system.

[0006] The technical solution of the utility model is as follows:

[0007] An electric vehicle lighting control system includes an adaptively connected light sensing module, a headlight module, and a combination switch module, wherein the headlight module includes an MCU, a low-beam light LED 1, a low-beam light driving unit, a front position light LED 2, and a position light signal detection unit;

[0008] The light sensing signal detection pin of the MCU is connected to the light sensing module for detecting the light sensing signal; the driving signal output pin of the MCU is connected to the low beam LED1 through the low beam driving unit for outputting the driving signal to the low beam driving unit, and the low beam LED1 is connected to the combination switch module;

[0009] The first position light signal detection pin and the second position light signal detection pin of the MCU are connected to the position light signal detection unit, the first position light signal detection pin is used to detect the first position light signal, and the second position light signal detection pin is used to detect the second position light signal. The position light signal detection unit is connected to the front position light LED2, the low beam drive unit and the combination switch module;

[0010] The MCU is used to control the low beam light LED 1 and the front position light LED 2 in combination with the light sensing signal, the first position light signal and the second position light signal.

[0011] A further technical solution is that the low beam driving unit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q1 and a switch tube Q2, wherein:

[0012] The drive signal output pin of the MCU is connected to one end of the resistor R5 and the second electrode of the switch tube Q1 through the resistor R6, and the other end of the resistor R5 is connected to the first electrode of the switch tube Q1 and grounded;

[0013] The third electrode of the switch tube Q1 is connected to one end of the resistor R8 and the second electrode of the switch tube Q2 via the resistor R7. The third electrode of the switch tube Q2 is connected to the anode of the low beam LED1. The cathode of the low beam LED1 is grounded.

[0014] A further technical solution is that the position light signal detection unit includes a diode D3, a diode D4, a switch tube Q3, a resistor R9, a resistor R10, a resistor R11 and a resistor R12, wherein:

[0015] The anode of the diode D3 is connected to the third electrode of the switch tube Q2, the cathode of the diode D3 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the anode of the front position lamp LED2 and the second electrode of the switch tube Q3, and the cathode of the front position lamp LED2 is grounded;

[0016] The first electrode of the switch tube Q3 is connected to the third electrode of the switch tube Q2, and the third electrode of the switch tube Q3 is connected to the first position light signal detection pin of the MCU and one end of the resistor R10 through the resistor R9, and the other end of the resistor R10 is grounded;

[0017] The second electrode of the switch tube Q3 is connected to one end of the resistor R11 and the combination switch module. The other end of the resistor R11 is connected to the second position light signal detection pin of the MCU and is grounded through the resistor R12.

[0018] A further technical solution is that the headlamp module further includes a power supply unit, which includes a voltage stabilizer, a capacitor C1, a capacitor C2 and a diode D1, wherein:

[0019] The power supply voltage is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the input end of the voltage regulator, one end of the resistor R8 and the first electrode of the switch tube Q2, and the output end of the voltage regulator is connected to the power pin of the MCU;

[0020] The output end of the voltage regulator is grounded via a capacitor C1 , and the input end of the voltage regulator is grounded via a capacitor C2 .

[0021] A further technical solution is that the light sensing module includes a light sensing element, a light sensing MCU, resistors R1, R2, R3 and a switch tube Q4, and the headlight module also includes a diode D2, a resistor R4 and a capacitor C3;

[0022] The light sensing element is connected to the input pin of the light sensing MCU, and the output pin of the light sensing MCU is connected to one end of the resistor R2 and the second electrode of the switch tube Q4 through the resistor R1. The other end of the resistor R2 and the first electrode of the switch tube Q4 are grounded, and the third electrode of the switch tube Q4 is connected to the power supply voltage through the resistor R3;

[0023] The light-sensing signal detection pin of the MCU is connected to the third electrode of the switch tube Q4 through the diode D2, the light-sensing signal detection pin of the MCU is connected to the power pin of the MCU through the resistor R4, and the light-sensing signal detection pin of the MCU is also grounded through the capacitor C3.

[0024] A further technical solution is that the switch tube Q1 , the switch tube Q3 and the switch tube Q4 are triodes, and the switch tube Q2 is a MOS tube.

[0025] A further technical solution is that the light sensing module includes a light sensing module, a power supply end of the light sensing module is connected to a power pin of the MCU, and a signal output end of the light sensing module is connected to a light sensing signal detection pin of the MCU.

[0026] A further technical solution is that it also includes a rear taillight module, which includes a diode D4, a diode D5, a diode D6, a rear position light LED4 and a brake light LED5, wherein:

[0027] The anode of the diode D5 is connected to one end of the resistor R11, the second electrode of the switch tube Q3 and the combination switch module, the cathode of the diode D5 is connected to the cathode of the diode D7 and the anode of the rear position light LED4, the cathode of the rear position light LED4 is grounded, the anode of the diode D7 is connected to the cathode of the diode D6 and the anode of the brake light LED6, and the cathode of the brake light LED6 is grounded.

[0028] A further technical solution is that the combination switch module includes a left combination switch unit, a right combination switch unit and a brake light switch;

[0029] The left combination switch unit includes a passing light switch and a high beam light switch, and the headlight module also includes a high beam off light LED3;

[0030] The cathode of the high-beam LED 3 is grounded, the anode of the high-beam LED 3 is connected to a first end of a passing light switch and is connected to the right combination switch unit and the anode of the low-beam LED 1 through the high-beam switch, and the other end of the passing light switch is connected to a power supply voltage;

[0031] The anode of the diode D6 is connected to one end of the brake light switch, and the other end of the brake light switch is connected to the power supply voltage.

[0032] A further technical solution is that the right combination switch unit includes a position light switch and a low beam light switch, wherein:

[0033] One end of the low beam switch is connected to the anode of the low beam LED1 and one end of the high beam switch, and the other end of the low beam switch is connected to one end of the position light switch, the anode of the diode D5, one end of the resistor R11 and the anode of the front position light LED2, and the other end of the position light switch is connected to the power supply voltage.

[0034] The beneficial technical effects of the utility model are:

[0035] The utility model provides an electric vehicle lighting control system that can detect a light sensor signal, a first position light signal, and a second position light signal through an MCU, and control the automatic headlight function to be turned on or off in combination with the light sensor signal, the first position light signal, and the second position light signal. When the automatic headlight function is turned on, the low beam headlights are controlled according to the light sensor signal, that is, the automatic headlights are turned on or off. This can avoid the problem of the automatic headlight function being turned on by mistake and the problem of inconvenience in using the lights in dim light environments, thereby improving the accuracy and convenience of electric vehicle lighting control. In practical applications, the following can be achieved:

[0036] (1) When the position light switch is turned on in any lighting environment, the automatic headlight function will not be turned on by mistake.

[0037] (2) When all the vehicle lights are turned off and the vehicle suddenly enters a dark environment, the low beam headlights, front position lights and rear position lights can be automatically turned on without any switch control.

[0038] (3) Even if the low beam switch is damaged, the low beam can still be automatically turned on in a dark environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a circuit schematic diagram of a first embodiment of the electric vehicle lighting control system provided by the present utility model.

[0040] Figure 2 This is a circuit schematic diagram of a second embodiment of the electric vehicle lighting control system provided by the present utility model.

[0041] Figure 3 This is a logic block diagram of an embodiment of the automatic headlight function control logic provided by the utility model. DETAILED DESCRIPTION

[0042] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0043] The utility model provides an electric vehicle lighting control system, comprising an adaptively connected light sensing module, a headlight module and a combination switch module, wherein the headlight module comprises an MCU, a low beam LED 1, a low beam driving unit, a front position light LED 2 and a position light signal detection unit;

[0044] The light sensing signal detection pin of the MCU is connected to the light sensing module for detecting the light sensing signal; the driving signal output pin of the MCU is connected to the low beam LED1 through the low beam driving unit for outputting the driving signal to the low beam driving unit, and the low beam LED1 is connected to the combination switch module;

[0045] The first position light signal detection pin and the second position light signal detection pin of the MCU are connected to the position light signal detection unit, the first position light signal detection pin is used to detect the first position light signal, and the second position light signal detection pin is used to detect the second position light signal. The position light signal detection unit is connected to the front position light LED2, the low beam light drive unit and the combination switch module; the MCU is used to control the low beam light LED1 and the front position light LED2 in combination with the light sensing signal, the first position light signal and the second position light signal.

[0046] Specifically, the light sensing module is used to detect the lighting environment and output a light sensing signal to the light sensing signal detection pin of the MCU. The MCU's drive signal output pin controls the low-beam LED 1 by outputting a drive signal to the low-beam drive unit. The first position light signal detection pin detects a first position light signal through the position light signal detection unit, and the second position light signal detection pin detects a second position light signal through the position light signal detection unit. The first position light signal is used to indicate the state of the position light switch in the combination switch module, and the second position light signal is used to indicate the operating state of the front position light LED 2.

[0047] The MCU controls the low beam LED1 and the front position light LED2 in combination with the light sensing signal, the first position light signal, and the second position light signal. Specifically, this lighting control system determines whether the automatic headlight function should be turned on based on the control logic of the automatic headlight function by combining the light sensing signal, the first position light signal, and the second position light signal. When the automatic headlight function is turned on, the low beam LED1 is controlled to light up or off by the low beam driving unit to avoid the problem of the automatic headlight function being turned on by mistake and the problem of inconvenience in using the light in a dark environment, thereby improving the accuracy and convenience of the lighting control of the electric vehicle. When the MCU controls the low beam LED1 to light up by outputting a driving signal, the front position light LED2 also lights up. The specific forms of the low beam driving unit and the position light signal detection unit can be referred to in the following description, and the specific logic of the automatic headlight function control can also be referred to in the following description.

[0048] Furthermore, the low beam driving unit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q1 and a switch tube Q2, wherein:

[0049] The drive signal output pin of the MCU is connected to one end of the resistor R5 and the second electrode of the switch tube Q1 through the resistor R6, and the other end of the resistor R5 is connected to the first electrode of the switch tube Q1 and grounded;

[0050] The third electrode of the switch tube Q1 is connected to one end of the resistor R8 and the second electrode of the switch tube Q2 via the resistor R7. The third electrode of the switch tube Q2 is connected to the anode of the low beam LED1. The cathode of the low beam LED1 is grounded.

[0051] Figure 1 The circuit diagram of the control system in the first embodiment of the present invention is shown in FIG. Figure 1As shown, the switch tube Q1 in the first embodiment is an NPN transistor, and the switch tube Q2 is a P-type MOS tube. For the transistor, the first electrode is the emitter, the second electrode is the base, and the third electrode is the collector. For the MOS tube, the first electrode is the source, the second electrode is the gate, and the third electrode is the drain. In specific implementation, the switch device Q1 and the switch device Q2 can also use other power devices with switching performance. At the same time, the model of the MCU in the first embodiment can be CH32V003, such as Figure 1 As shown in the figure, the GG_dr pin is the drive signal output pin, test1 is the first position light signal detection pin, test2 is the second position light signal detection pin, and the GG pin is the light sensing signal detection pin.

[0052] Furthermore, the headlamp module also includes a power supply unit, which includes a voltage regulator, a capacitor C1, a capacitor C2 and a diode D1, wherein the power supply voltage is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the input end of the voltage regulator, one end of the resistor R8 and the first electrode of the switch tube Q2, and the output end of the voltage regulator is connected to the power pin of the MCU; the output end of the voltage regulator is grounded through the capacitor C1, and the input end of the voltage regulator is grounded through the capacitor C2.

[0053] like Figure 1 As shown, the VDD pin of the MCU represents the power pin, and the VSS pin represents the ground pin. In Example 1, the power supply voltage is 12V, and the voltage regulator adopts a low dropout regulator (LDO) of model 78L05 to step down the 12V power supply voltage to 3.3V or 5V to power the MCU. The capacitors C1 and C2 play the role of voltage stabilization and filtering, and the diode D1 is used for anti-reverse current protection. During specific implementation, the models of the MCU and the voltage regulator can be selected according to actual conditions, and the power supply voltage value can also be selected according to power supply requirements.

[0054] The MCU controls the operating state of the low-beam LED 1 through switches Q1 and Q2. When the drive signal output pin outputs a high-level drive signal, the high voltage is divided by resistors R5 and R6 and applied between the emitter and base of the NPN transistor (switch Q1), turning on switch Q1. The gate potential of the PMOS transistor (switch Q2) is pulled down to ground, turning on switch Q2. The power supply voltage is applied to the anode of the low-beam LED 1 through diode D1 and switch Q2, illuminating the low-beam LED 1. Conversely, when the drive signal output pin outputs a low-level drive signal, switches Q1 and Q2 are turned off, turning off the low-beam LED 1.

[0055] Furthermore, the light sensing module includes a light sensing element, a light sensing MCU, a resistor R1, a resistor R2, a resistor R3 and a switch tube Q4. When the light sensing module includes a light sensing element, a light sensing MCU, a resistor R1, a resistor R2, a resistor R3 and a switch tube Q4, the headlamp module further includes a diode D2, a resistor R4 and a capacitor C3;

[0056] The light sensing element is connected to the input pin of the light sensing MCU, and the output pin of the light sensing MCU is connected to one end of the resistor R2 and the second electrode of the switch tube Q4 through the resistor R1. The other end of the resistor R2 and the first electrode of the switch tube Q4 are grounded, and the third electrode of the switch tube Q4 is connected to the power supply voltage through the resistor R3;

[0057] The light-sensing signal detection pin of the MCU is connected to the third electrode of the switch tube Q4 through the diode D2, the light-sensing signal detection pin of the MCU is connected to the power pin of the MCU through the resistor R4, and the light-sensing signal detection pin of the MCU is also grounded through the capacitor C3.

[0058] Specifically, the switch tube Q4 is an NPN-type transistor. The definitions of the first electrode, the second electrode and the third electrode of the switch tube Q4 are the same as the definitions of the first electrode, the second electrode and the third electrode of the transistor mentioned above, and will not be repeated here. The resistor R4 serves as a current limiting resistor, the capacitor C3 is used for filtering, and the diode D2 is used for anti-backflow protection. The form of the photosensitive element is consistent with the prior art and can detect whether the current environment of the electric vehicle is a dark light environment or a strong light environment. When the photosensitive module detects that the current environment is a dark light environment, the output pin of the photosensitive MCU outputs a high level, and the high level is loaded between the emitter and the base of the switch tube Q4 after being divided by the resistors R1 and R2, so that the switch tube Q4 is turned on to output a low-level photosensitive signal to the MCU. When the photosensitive module detects that the current environment is a strong light environment, the output pin of the photosensitive MCU outputs a low level, and the switch tube Q4 is turned off to output a high-level photosensitive signal to the MCU.

[0059] Furthermore, the position light signal detection unit includes a diode D3, a diode D4, a switch tube Q3, a resistor R9, a resistor R10, a resistor R11 and a resistor R12, wherein:

[0060] The anode of the diode D3 is connected to the third electrode of the switch tube Q2, the cathode of the diode D3 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the anode of the front position lamp LED2 and the second electrode of the switch tube Q3, and the cathode of the front position lamp LED2 is grounded;

[0061] The first electrode of the switch tube Q3 is connected to the third electrode of the switch tube Q2, and the third electrode of the switch tube Q3 is connected to the first position light signal detection pin of the MCU and one end of the resistor R10 through the resistor R9, and the other end of the resistor R10 is grounded;

[0062] The second electrode of the switch tube Q3 is connected to one end of the resistor R11 and the combination switch module. The other end of the resistor R11 is connected to the second position light signal detection pin of the MCU and is grounded through the resistor R12.

[0063] Specifically, the switch Q3 in the first embodiment is a PNP transistor. The definitions of the first, second, and third electrodes of the switch Q3 are the same as those of the first, second, and third electrodes of the transistor described above and are not further described here. The specific operating principle of the position light signal detection unit can be found in the following description.

[0064] Furthermore, the electric vehicle lighting control system also includes a rear taillight module, which includes a diode D4, a diode D5, a diode D6, a rear position light LED4 and a brake light LED5, wherein the anode of the diode D5 is connected to one end of the resistor R11, the second electrode of the switch tube Q3 and the combination switch module, the cathode of the diode D5 is connected to the cathode of the diode D7 and the anode of the rear position light LED4, the cathode of the rear position light LED4 is grounded, the anode of the diode D7 is connected to the cathode of the diode D6 and the anode of the brake light LED6, and the cathode of the brake light LED6 is grounded.

[0065] Specifically, the combination switch module includes a left combination switch unit, a right combination switch unit, and a brake light switch. The left combination switch unit includes a passing light switch and a high-beam switch. The headlight module also includes a high-beam off LED 3. The cathode of the high-beam LED 3 is grounded, while the anode of the high-beam LED 3 is connected to the first end of the passing light switch and, through the high-beam switch, to the right combination switch unit and the anode of the low-beam LED 1. The other end of the passing light switch is connected to a power supply voltage. The anode of the diode D6 is connected to one end of the brake light switch, while the other end of the brake light switch is connected to a power supply voltage.

[0066] The right combination switch unit includes a position light switch and a low-beam switch. One end of the low-beam switch is connected to the anode of the low-beam LED 1 and one end of the high-beam switch. The other end of the low-beam switch is connected to one end of the position light switch, the anode of the diode D5, one end of the resistor R11, and the anode of the front position light LED 2. The other end of the position light switch is connected to a power supply voltage. In the first embodiment, the passing light switch and the brake light switch are push-button switches, while the high-beam, low-beam, and position light switches are toggle switches.

[0067] The low-beam LED 1 is illuminated when both the position light switch and the low-beam switch are closed, or when the automatic headlight function is turned on, it is illuminated as the automatic headlight is controlled by the driving signal. The front position light LED 2 is illuminated when the position light switch is closed, or when the automatic headlight function is turned on, it is illuminated as the low-beam LED 1 is illuminated.

[0068] In the position light signal detection unit, diodes D3 and D4 detect the direction of current flow, further detecting the position light switch status and indicating it through the first position light signal. Specifically, when the automatic headlight function is enabled, the low-beam LED1 is illuminated as an automatic headlight, and the position light switch is off, diodes D3 and D4 conduct, and current flows sequentially through diode D1, switch Q2, diode D3, diode D4, and the front position light LED2 to ground. Diodes D3 and D4 generate a forward voltage drop between the emitter and base of switch Q3 that is greater than the conduction voltage drop of switch Q3, causing switch Q3 to conduct. This forward voltage drop is divided by resistors R9 and R10 and applied to the first position light signal detection pin of the MCU. The first position light signal detection pin of the MCU, test1, detects a high-level first position light signal. When the position light switch is closed, the cathode of diode D4 is directly connected to the 12V power supply voltage through the position light switch, making the cathode potential of diode D4 and the anode potential almost equal. As a result, diodes D4 and D3 are cut off, and switch Q3 is turned off. The MCU's first position light signal detection pin, test1, detects a low-level first position light signal. Therefore, the first position light signal can represent the status of the position light switch.

[0069] When the front position light LED2 is on, the MCU's second position light signal detection pin, i.e., the test2 pin, will obtain a high level after voltage division by resistors R11 and R12. That is, when the front position light LED2 is on, the second position light signal is high. Therefore, the second position light signal can represent the working status of the front position light LED2.

[0070] The high-beam LED 3 is illuminated when the passing light switch is turned on, or when the position light switch, low-beam switch, and high-beam switch are all closed. The rear position light LED 4 is illuminated when the front position light LED 2 is turned on, or is illuminated along with the brake light LED 5 when the brake light switch is turned on. The diode D5 prevents the front position light LED 2 from illuminating along with the brake light LED 5.

[0071] Optionally, the light sensing module in the first embodiment is disposed outside the headlight module. To improve the integration of the system, the light sensing module may also be a light sensing module integrated into the headlight module. Figure 2 The circuit diagram of the control system in the second embodiment of the present invention is shown, when the light sensing module is a highly integrated light sensing module. The difference between the second embodiment and the first embodiment is that the light sensing module is a light sensing module, and the diode D2, the resistor R4 and the capacitor C3 are not required in the headlight module. Figure 2 As shown, the power supply terminal of the light sensing module is connected to the power pin of the MCU, and the signal output terminal of the light sensing module is connected to the light sensing signal detection pin of the MCU. Similar to the above embodiment, when the light sensing module detects that the current environment is a dark environment, the signal output terminal outputs a low-level light sensing signal to the MCU. When the light sensing module detects that the current environment is a bright light environment, the signal output terminal outputs a high-level light sensing signal to the MCU.

[0072] In the above-mentioned embodiment 1 and embodiment 2, the automatic headlight function control logic adopted is the same. Figure 3 The following is a logic block diagram of the automatic headlight function control logic, which specifically includes the following steps:

[0073] Step 1: The electric vehicle is turned on, and the headlight module enters initialization. The MCU forces the drive signal output pin to output a low-level drive signal, that is, the low beam LED2 is not controlled by the light sensor signal, and the automatic headlight function is turned off.

[0074] Step 2: The MCU determines whether the second position light signal is a low level signal;

[0075] If the second position light signal is at a low level, it is determined that the front position light LED2 is not on, and thus the position light switch is determined to be in the off state, the automatic headlight function is turned on, and the light sensor signal is continuously detected;

[0076] If the second position light signal is at a high level, the front position light LED 2 is on, and thus the position light switch is determined to be in the closed state. The automatic headlight function is kept off, and step 2 is continuously executed.

[0077] Step 3: MCU determines whether the light-sensing signal is a low-level signal;

[0078] If the light sensing signal is a low-level signal, it is determined that the light sensing is valid, that is, the electric vehicle is in a dark environment, and the drive signal output pin outputs a high-level drive signal to drive the low beam LED2 to light up;

[0079] If the light sensing signal is a high-level signal, it is determined that the light sensing is invalid, that is, the electric vehicle is in a strong light environment, the drive signal output pin continues to output a low-level drive signal, and returns to step 2.

[0080] Step 4: The MCU determines whether the first position light signal is a high level signal;

[0081] If the first position light signal is a high-level signal, the position light switch is determined to be in the off state, and the process returns to step 3;

[0082] If the first position light signal is a low-level signal, it is determined that the position light switch is in a closed state, the MCU controls the drive signal output pin to output a low-level drive signal, and returns to step 2.

[0083] According to the above automatic headlight function control logic, the electric vehicle control system proposed by the utility model can achieve the following:

[0084] (1) When the position light switch is turned on in any lighting environment, the automatic headlight function will not be turned on by mistake.

[0085] (2) When all the vehicle lights are turned off and the vehicle suddenly enters a dark environment, the low beam headlights, front position lights and rear position lights can be automatically turned on without any switch control.

[0086] (3) Even if the low beam switch is damaged, the low beam can still be automatically turned on in a dark environment.

[0087] The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. An electric vehicle lighting control system, characterized in that: It includes an adaptively connected light sensing module, a headlight module and a combination switch module, wherein the headlight module includes an MCU, a low beam LED1, a low beam drive unit, a front position light LED2 and a position light signal detection unit; The light sensing signal detection pin of the MCU is connected to the light sensing module for detecting the light sensing signal; the driving signal output pin of the MCU is connected to the low beam LED1 through the low beam driving unit for outputting the driving signal to the low beam driving unit, and the low beam LED1 is connected to the combination switch module; The first position light signal detection pin and the second position light signal detection pin of the MCU are connected to the position light signal detection unit, and the position light signal detection unit is connected to the front position light LED2, the low beam light drive unit and the combination switch module; The first position light signal detection pin is used to detect the first position light signal, and the second position light signal detection pin is used to detect the second position light signal; the MCU is used to control the low beam LED1 and the front position light LED2 in combination with the light sensing signal, the first position light signal and the second position light signal.

2. The electric vehicle lighting control system according to claim 1, characterized in that: The low beam driving unit includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, a switch tube Q1 and a switch tube Q2, wherein: The drive signal output pin of the MCU is connected to one end of the resistor R5 and the second electrode of the switch tube Q1 through the resistor R6, and the other end of the resistor R5 is connected to the first electrode of the switch tube Q1 and grounded; The third electrode of the switch tube Q1 is connected to one end of the resistor R8 and the second electrode of the switch tube Q2 through the resistor R7. The third electrode of the switch tube Q2 is connected to the anode of the low beam LED1. The cathode of the low beam LED1 is grounded. The first electrode of the switch tube Q2 is connected to the other end of the resistor R8.

3. The electric vehicle lighting control system according to claim 2, characterized in that: The position light signal detection unit includes a diode D3, a diode D4, a switch tube Q3, a resistor R9, a resistor R10, a resistor R11 and a resistor R12, wherein: The anode of the diode D3 is connected to the third electrode of the switch tube Q2, the cathode of the diode D3 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the anode of the front position lamp LED2 and the second electrode of the switch tube Q3, and the cathode of the front position lamp LED2 is grounded; The first electrode of the switch tube Q3 is connected to the third electrode of the switch tube Q2, and the third electrode of the switch tube Q3 is connected to the first position light signal detection pin of the MCU and one end of the resistor R10 through the resistor R9, and the other end of the resistor R10 is grounded; The second electrode of the switch tube Q3 is connected to one end of the resistor R11 and the combination switch module. The other end of the resistor R11 is connected to the second position light signal detection pin of the MCU and is grounded through the resistor R12.

4. The electric vehicle lighting control system according to claim 2, characterized in that: The headlamp module further includes a power supply unit, which includes a voltage stabilizer, a capacitor C1, a capacitor C2, and a diode D1. The power supply voltage is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the input end of the voltage regulator, one end of the resistor R8 and the first electrode of the switch tube Q2, and the output end of the voltage regulator is connected to the power pin of the MCU; The output end of the voltage regulator is grounded via a capacitor C1 , and the input end of the voltage regulator is grounded via a capacitor C2 .

5. The electric vehicle lighting control system according to claim 3, characterized in that: The light sensing module includes a light sensing element, a light sensing MCU, resistors R1, R2, R3 and a switch tube Q4, and the headlight module also includes a diode D2, a resistor R4 and a capacitor C3; The light sensing element is connected to the input pin of the light sensing MCU, and the output pin of the light sensing MCU is connected to one end of the resistor R2 and the second electrode of the switch tube Q4 through the resistor R1. The other end of the resistor R2 and the first electrode of the switch tube Q4 are grounded, and the third electrode of the switch tube Q4 is connected to the power supply voltage through the resistor R3; The light-sensing signal detection pin of the MCU is connected to the third electrode of the switch tube Q4 through the diode D2, the light-sensing signal detection pin of the MCU is connected to the power pin of the MCU through the resistor R4, and the light-sensing signal detection pin of the MCU is also grounded through the capacitor C3.

6. The electric vehicle lighting control system according to claim 5, characterized in that: The switch tubes Q1 , Q3 and Q4 are triodes, and the switch tube Q2 is a MOS tube.

7. The electric vehicle lighting control system according to claim 1, characterized in that: The light sensing module includes a light sensing module, a power supply end of the light sensing module is connected to a power supply pin of the MCU, and a signal output end of the light sensing module is connected to a light sensing signal detection pin of the MCU.

8. The electric vehicle lighting control system according to claim 5, characterized in that: It also includes a rear taillight module, which includes a diode D4, a diode D5, a diode D6, a rear position light LED4 and a brake light LED5, wherein: The anode of the diode D5 is connected to one end of the resistor R11, the second electrode of the switch tube Q3 and the combination switch module, the cathode of the diode D5 is connected to the cathode of the diode D7 and the anode of the rear position light LED4, the cathode of the rear position light LED4 is grounded, the anode of the diode D7 is connected to the cathode of the diode D6 and the anode of the brake light LED6, and the cathode of the brake light LED6 is grounded.

9. The electric vehicle lighting control system according to claim 8, characterized in that: The combination switch module includes a left combination switch unit, a right combination switch unit and a brake light switch; The left combination switch unit includes a passing light switch and a high beam light switch, and the headlight module also includes a high beam light LED3; The cathode of the high-beam LED 3 is grounded, the anode of the high-beam LED 3 is connected to a first end of a passing light switch and is connected to the right combination switch unit and the anode of the low-beam LED 1 through the high-beam switch, and the other end of the passing light switch is connected to a power supply voltage; The anode of the diode D6 is connected to one end of the brake light switch, and the other end of the brake light switch is connected to the power supply voltage.

10. The electric vehicle lighting control system according to claim 9, characterized in that: The right combination switch unit includes a position light switch and a low beam light switch, wherein: One end of the low beam switch is connected to the anode of the low beam LED1 and one end of the high beam switch, and the other end of the low beam switch is connected to one end of the position light switch, the anode of the diode D5, one end of the resistor R11 and the anode of the front position light LED2, and the other end of the position light switch is connected to the power supply voltage.

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