Steering priority light control circuit for electric vehicle
By designing a turn-priority lighting control circuit on electric vehicles and using a double-flash chip and logic control unit to prioritize the display of turn signals, the problem of the electric vehicle's turn signal control system being unable to accurately display when the double-flash function is turned on is solved, thereby improving traffic safety and circuit reliability.
Patent Information
- Application Number
- CN202422792592.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-15
AI Technical Summary
The current turn signal control system of electric vehicles cannot prioritize the display of turn signals when the double flash function is turned on, resulting in the inability of vehicles behind to accurately judge the vehicle status, increasing the risk of rear-end collisions, and affecting driving safety and the accuracy of signal indications.
A turn-priority light control circuit for electric vehicles is designed. Through a dual-flash chip and a logic control unit, the circuit ensures that the left or right turn signal is displayed first when the dual-flash lights are turned on. The dual-flash chip powers the corresponding turn signal when the turn signal switch is actuated, causing it to flash at the turning frequency.
It effectively reduces the misjudgment of turn signals by traffic participants, improves traffic safety, can accurately display turn signals in emergency situations without interfering with normal traffic order, and improves the wiring efficiency and waterproof ability of the circuit.
Smart Images
Figure CN223364297U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of light control circuits, in particular to a light control circuit with steering priority for electric vehicles. Background Art
[0002] Turn signals are designed to clearly indicate the vehicle's driving intentions to other road users when turning, changing lanes, and other operations. Currently, the turn signal control systems of electric vehicles, such as electric two-wheelers, are relatively simple, mainly used to provide basic signal indications. As more and more electric vehicles are on the road, the requirements for the accuracy and safety of the turn signal indications of two-wheeled electric vehicles are also constantly increasing.
[0003] Nowadays, more electric vehicles are equipped with hazard lights ("double flashes") to flash simultaneously with the left and right turn signals in case of emergency (such as poor visibility in rainy or foggy weather, or when a food delivery driver is making an urgent delivery). However, the current turn signal display function when the hazard lights are on has defects. For example, when the hazard lights are on, the turn signal is not displayed first. This makes it difficult for vehicles behind to accurately determine whether the vehicle ahead is turning normally or in an emergency, which can easily lead to rear-end collisions and affect driving safety and the accuracy of signal indications. Utility Model Content
[0004] In response to the above problems and technical requirements, the inventors have proposed a steering-priority lighting control circuit for electric vehicles.
[0005] The technical solution of the utility model is as follows:
[0006] A turn-priority light control circuit for an electric vehicle includes a double flash light switch, a turn signal switch, a logic control unit, a left turn signal unit, and a right turn signal unit;
[0007] The logic control unit includes a double flash chip, one end of the double flash light switch is connected to the double flash signal input pin of the double flash chip, and the other end of the double flash light switch is grounded;
[0008] The turn signal switch includes a first connection end, a second connection end, and a third connection end. The first connection end is connected to the first output pin of the dual flash chip, the second connection end is connected to the left turn signal unit, and the third connection end is connected to the right turn signal unit. The left turn signal unit is also connected to the second output pin of the dual flash chip, and the right turn signal unit is also connected to the third output pin of the dual flash chip.
[0009] The dual flash chip is used to supply power to the left turn light unit through the second output pin and to supply power to the right turn light unit through the third output pin when the dual flash light switch is closed;
[0010] The dual flash chip is used to supply power to the left turn light unit or the right turn light unit electrically connected to the first connection end through the first output pin when the dual flash switch is closed or opened and the first connection end of the turn signal switch is electrically connected to the second connection end or the third connection end.
[0011] A further technical solution is that the dual flash chip includes a NOT gate U1A, a NOT gate U1B and a NAND gate U2, wherein:
[0012] The output end of the NOT gate U1A is connected to the first input end of the NAND gate U2, the output end of the NOT gate U1B is connected to the second input end of the NAND gate, and the input end of the NOT gate U1B is connected to the double flash signal input pin.
[0013] A further technical solution is that the dual flash chip further includes a resistor R1, the output end of the NAND gate U2 is connected to the first output pin via the resistor R1, and the output end of the NAND gate U2 is also connected to the second output pin and the third output pin.
[0014] A further technical solution is that the dual flash chip further includes a power input pin, the input end of the NOT gate U1A is connected to the power input pin, the power input pin is connected to a power supply, and the power supply is used to provide a power supply voltage.
[0015] A further technical solution is that the power supply is a DC power supply, and the power supply voltage ranges from 9V to 15V.
[0016] A further technical solution is that the double flash light switch is a touch switch or a toggle switch.
[0017] A further technical solution is that the left turn light unit includes at least one left turn light, and the right turn light unit includes at least one right turn light.
[0018] A further technical solution is that the left turn signal and the right turn signal are both LEDs, the positive pole of the left turn signal is connected to the second connection end, the positive pole of the right turn signal is connected to the third connection end, and the negative poles of the left turn signal and the right turn signal are grounded.
[0019] A further technical solution is that the double flash chip is used to power the left turn signal and the right turn signal and make the left turn signal and the right turn signal flash at a double flash frequency when the double flash switch is closed;
[0020] The dual flash chip is also used to power the left turn light or the right turn light electrically connected to the first connection end when the dual flash light switch is closed or disconnected and the first connection end of the turn signal switch is electrically connected to the second connection end or the third connection end, and to make the left turn light or the right turn light flash at the turning frequency accordingly.
[0021] A further technical solution is that the dual flash chip is arranged on the instrument PCB of the electric vehicle.
[0022] The beneficial technical effects of the utility model are:
[0023] (1) When the hazard lights and turn signal switches are activated simultaneously, the logic control unit controls the left or right turn signal to flash at the turning frequency, that is, the left and right turn signals are used to display the turn signal first, which effectively reduces the possibility of traffic participants (vehicles or pedestrians) misjudging the turn signal, allowing traffic participants to adjust their speed and route in advance to ensure traffic safety.
[0024] (2) In emergency situations, such as when a vehicle breaks down and needs to make a temporary stop, or when encountering special road conditions and needing to change lanes quickly, the turn signal priority display allows the vehicle to accurately send out the turn signal before turning on the hazard lights, ensuring the safety of the special operation process while not causing excessive interference with normal traffic order.
[0025] (3) Placing the dual flash chip in the original instrument PCB of the electric vehicle can make full use of the existing line resources of the instrument PCB and improve the wiring efficiency of the circuit.
[0026] (4) Benefiting from the overall waterproof structure of the instrument PCB, placing the dual flash chip inside the instrument PCB of the electric vehicle can effectively prevent the dual flash chip from being corroded by external moisture, thereby improving the waterproof capability of the dual flash chip and further enhancing the reliability of the entire circuit in humid or harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The utility model is a circuit principle diagram of an embodiment of a steering-priority lighting control circuit for an electric vehicle provided by the present invention. DETAILED DESCRIPTION
[0028] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.
[0029] The utility model provides a turn-priority light control circuit for electric vehicles, comprising a double flash light switch, a turn signal switch, a logic control unit, a left turn signal unit, and a right turn signal unit;
[0030] The logic control unit includes a double flash chip, one end of the double flash light switch is connected to the double flash signal input pin of the double flash chip, and the other end of the double flash light switch is grounded;
[0031] The turn signal switch includes a first connection end, a second connection end, and a third connection end, wherein the first connection end is connected to the first output pin of the dual flash chip, the second connection end is connected to the left turn signal unit, and the third connection end is connected to the right turn signal unit;
[0032] The left turn signal unit is further connected to the second output pin of the dual flash chip, and the right turn signal unit is further connected to the third output pin of the dual flash chip;
[0033] The dual flash chip is used to supply power to the left turn light unit through the second output pin and to supply power to the right turn light unit through the third output pin when the dual flash light switch is closed;
[0034] The dual flash chip is used to power the left turn light unit or the right turn light unit electrically connected to the first connection end through the first output pin when the dual flash light switch is closed or opened and the first connection end of the turn light switch is electrically connected to the second connection end or the third connection end.
[0035] Figure 1 A circuit diagram of an embodiment of a lighting control circuit is shown in FIG. Figure 1 As shown, the dual flash signal input pin of the dual flash chip is the FLASH_SIG pin, the first output pin is the VOUT1 pin, the second output pin is the VOUT2 pin, and the third output pin is the VOUT3 pin. The turn signal switch is a single-pole double-throw switch, including a first connection end, a second connection end, and a third connection end. The second connection end is Figure 1 The LEFT_TURN end shown, the third connection end is Figure 1 The turn signal switch also includes a movable terminal, the first connecting terminal being connected to the LEFT_TURN terminal or the RIGHT_TURN terminal via the movable terminal. The VOUT1 pin is connected to the first connecting terminal via a turn signal line, the VOUT2 pin is connected to the left turn signal unit via a first double flash line, and the VOUT3 pin is connected to the right turn signal unit via a second double flash line. Figure 1 The center turn signal line is represented by a solid line, and the double flash signal line is represented by a dotted line. All of these lines use wires with good insulation and wear resistance to ensure stable and reliable signal transmission.
[0036] The hazard lights switch and turn signal switch control the left and right turn signal units, using the hazard lights chip, to select either turn mode or hazard lights mode. When only the hazard lights switch is on, the left and right turn signal units operate in hazard lights mode. The hazard lights chip supplies power to the left turn signal unit via the VOUT2 pin and to the right turn signal unit via the VOUT3 pin. When the hazard lights switch is on and the turn signal switch is actuated, the left and right turn signal units operate in hazard lights mode. When the hazard lights switch is off and the turn signal switch is actuated (i.e., when only the turn signal switch is actuated), the left and right turn signal units also operate in hazard lights mode.
[0037] The action of the turn signal switch specifically refers to toggling the movable end so that the first connection end is connected to the LEFT_TURN end or the RIGHT_TURN end. Correspondingly, when the first connection end is connected to the LEFT_TURN end, the dual flash chip powers the left turn signal unit through the VOUT1 pin; when the first connection end is connected to the RIGHT_TURN end, the dual flash chip powers the right turn signal unit through the VOUT1 pin.
[0038] The left turn signal unit and the right turn signal unit are mounted on the left and right sides of the electric vehicle, respectively. The left turn signal unit includes at least one left turn signal, and the right turn signal unit includes at least one right turn signal. Generally, LEDs (Light Emitting Diodes) are used for both the left and right turn signals due to their advantages of high brightness and low power consumption.
[0039] In dual-flash mode, the dual-flash chip powers both the left and right turn signals, causing them to flash at the dual-flash frequency to signal traffic to other traffic participants. In turn mode, the dual-flash chip powers either the left or right turn signal and causes it to flash at the turn frequency to signal traffic to other traffic participants. The dual-flash frequency and turn frequency can be the same or different. In this embodiment, they are both 1 Hz. In actual implementation, the dual-flash frequency and turn frequency can be set according to actual needs.
[0040] As can be seen from the above description, when the hazard lights switch is closed and the turn signal switch is activated, the left and right turn signal units operate in turn mode. That is, when the hazard lights switch and the turn signal switch are activated simultaneously, the left and right turn signal units are prioritized for displaying the turn signal. This can effectively reduce the possibility of traffic participants (vehicles or pedestrians) misjudging turn signals, allowing traffic participants to adjust their speed and route in advance to ensure traffic safety. In emergency situations, such as when a vehicle breaks down and needs to make a temporary stop or encounters special road conditions requiring a quick lane change, prioritizing the display of the turn signal allows the vehicle to accurately signal before activating the hazard lights. This ensures the safety of special operations while not causing excessive disruption to normal traffic order.
[0041] Figure 1 The left turn signal is represented by LED1, and the right turn signal is represented by LED2. The positive electrode of the left turn signal LED1 is connected to the second connection end, namely the LEFT_TURN end, and the positive electrode of the right turn signal LED2 is connected to the third connection end, namely the RIGHT_TURN end. The cathodes of the left turn signal LED1 and the right turn signal LED2 are grounded.
[0042] Furthermore, the dual flash chip includes a NOT gate U1A, a NOT gate U1B, a NAND gate U2, and a resistor R1. The output of the NOT gate U1A is connected to the first input of the NAND gate U2, the output of the NOT gate U1B is connected to the second input of the NAND gate, and the input of the NOT gate U1B is connected to the dual flash signal input pin. The output of the NAND gate U2 is connected to the first output pin via the resistor R1, and the output of the NAND gate U2 is also connected to the second and third output pins.
[0043] Specifically, the dual flash chip also includes a power input pin, the input end of the NOT gate U1A is connected to the power input pin, and the power input pin is connected to the power supply, and the power supply is used to provide a power supply voltage. Figure 1 The VCC pin in the circuit is also multiplexed as the turn signal input pin, namely the TURN_SIG pin. The power supply is a DC power supply with a power supply voltage range of 9V-15V to ensure the normal operation of each component in the circuit.
[0044] Since the VCC pin is also multiplexed as the TURN_SIG pin, the power supply continuously provides power voltage to the VCC pin, keeping the VCC pin at a high level, that is, continuously inputting a high-level turn signal to the input end of the NOT gate U1A.
[0045] When the hazard light switch is closed, the FLASH_SIG pin is grounded through the hazard light switch, effectively feeding a low-level hazard light signal into the input of NOT gate U1B. At this point, the high-level turn signal signal is inverted by NOT gate U1A and fed into the first input of NAND gate U1. The low-level hazard light signal is inverted by NOT gate U1B and fed into the second input of NAND gate U2, resulting in a high-level output from NAND gate U2. If the turn signal switch is activated at this point, the hazard light chip blocks the outputs of pins VOUT2 and VOUT3. A high-level signal is then output only through pin VOUT1 to the left or right turn signal LED1 or LED2, placing the left or right turn signal LED1 or LED2 in turn mode. If the turn signal switch is not actuated, that is, the active end is vacant, and the first connection end is not connected to the LEFT_TURN end and the RIGHT_TURN end, the dual flash chip blocks the output of the VOUT1 pin, and a high level is output to the left turn signal LED1 through the VOUT2 pin, and at the same time is output to the right turn signal LED2 through the VOUT3 pin, so that the left turn signal LED1 and the right turn signal LED2 work in the dual flash mode.
[0046] If the hazard light switch is off, the FLASH_SIG pin of the hazard light chip cannot be connected to ground, thus inputting a high-level hazard light signal to the input of NOT gate U1B. At this point, the high-level turn signal signal is inverted by NOT gate U1A and input to the first input of NAND gate U1. The high-level hazard light signal is inverted by NOT gate U1B and input to the second input of NAND gate U2, which still outputs a high level. However, because the hazard light signal is high, the hazard light chip blocks the outputs of pins VOUT2 and VOUT3, leaving only the VOUT1 pin outputting a high level. When the hazard light switch is activated, the left turn signal LED1 or the right turn signal LED2, respectively, operates in turn mode. The hazard light switch can be a touch switch or a toggle switch. It should be noted that the above only describes part of the logic circuit in the dual flash chip. The dual flash chip is also provided with a logic circuit for controlling the output status of the VOUT1 pin, VOUT2 pin and VOUT3 pin. Its form can be consistent with the existing technology to meet the control requirements of the output status of the VOUT1 pin, VOUT2 pin and VOUT3 pin.
[0047] Furthermore, the dual flash chip is arranged on a PCB (Printed Circuit Board) of an instrument panel of an electric vehicle.
[0048] Placing the dual-flash chip on the instrument panel PCB of an electric vehicle offers numerous significant advantages, notably improved wiring convenience and waterproofing. Specifically, the instrument panel PCB, a crucial circuit integrated board within an electric vehicle, already has a pre-planned wiring layout. Installing the dual-flash chip on the instrument panel PCB fully utilizes the existing wiring resources on the instrument panel PCB, making wiring between the dual-flash chip and other related components more convenient. By rationally utilizing the wiring layout of the instrument panel PCB, the need for additional wiring can be reduced, complex wiring intersections and lengthy wiring runs can be avoided, and the wiring efficiency of the entire circuit can be improved.
[0049] Furthermore, the instrument panel PCB is typically located in a relatively enclosed area with a certain degree of waterproofing. When the dual flash chip is mounted on the instrument panel PCB, the overall waterproof structure of the instrument panel PCB effectively protects the dual flash chip from external moisture. Compared to mounting the dual flash chip separately in other locations susceptible to water intrusion, this mounting method significantly improves the dual flash chip's waterproofing capabilities, thereby enhancing the reliability of the entire circuit system in humid or harsh environments.
[0050] 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. A steering-priority lighting control circuit for an electric vehicle, characterized in that: Including double flash light switch, turn signal switch, logic control unit, left turn signal unit and right turn signal unit; The logic control unit includes a double flash chip, one end of the double flash light switch is connected to the double flash signal input pin of the double flash chip, and the other end of the double flash light switch is grounded; The turn signal switch includes a first connection end, a second connection end, and a third connection end. The first connection end is connected to the first output pin of the dual flash chip, the second connection end is connected to the left turn signal unit, and the third connection end is connected to the right turn signal unit. The left turn signal unit is also connected to the second output pin of the dual flash chip, and the right turn signal unit is also connected to the third output pin of the dual flash chip. The dual flash chip is used to supply power to the left turn light unit through the second output pin and to supply power to the right turn light unit through the third output pin when the dual flash light switch is closed; The dual flash chip is also used to power the left turn light unit or the right turn light unit electrically connected to the first connection end through the first output pin when the dual flash light switch is closed or disconnected and the first connection end of the turn signal switch is electrically connected to the second connection end or the third connection end.
2. The electric vehicle steering priority lighting control circuit according to claim 1, characterized in that: The dual flash chip includes a NOT gate U1A, a NOT gate U1B and a NAND gate U2, wherein: The output end of the NOT gate U1A is connected to the first input end of the NAND gate U2, the output end of the NOT gate U1B is connected to the second input end of the NAND gate, and the input end of the NOT gate U1B is connected to the double flash signal input pin.
3. The electric vehicle steering-priority lighting control circuit according to claim 2, characterized in that: The dual flash chip further includes a resistor R1 , and the output end of the NAND gate U2 is connected to the first output pin via the resistor R1 . The output end of the NAND gate U2 is also connected to the second output pin and the third output pin.
4. The electric vehicle steering-priority lighting control circuit according to claim 2, characterized in that: The dual flash chip further includes a power input pin. The input end of the NOT gate U1A is connected to the power input pin. The power input pin is connected to a power supply, and the power supply is used to provide a power voltage.
5. The electric vehicle steering priority lighting control circuit according to claim 4, characterized in that: The power supply is a DC power supply, and the power supply voltage ranges from 9V to 15V.
6. The electric vehicle steering-priority lighting control circuit according to claim 1, characterized in that: The double flash light switch is a touch switch or a toggle switch.
7. The electric vehicle steering-priority lighting control circuit according to claim 1, characterized in that: The left turn signal unit includes at least one left turn signal, and the right turn signal unit includes at least one right turn signal.
8. The electric vehicle lighting control circuit with steering priority according to claim 7, characterized in that: The left turn signal lamp and the right turn signal lamp are both LEDs, the positive pole of the left turn signal lamp is connected to the second connection end, the positive pole of the right turn signal lamp is connected to the third connection end, and the negative poles of the left turn signal lamp and the right turn signal lamp are grounded.
9. The electric vehicle lighting control circuit with steering priority according to claim 7, characterized in that: The double flash chip is used to power the left turn signal and the right turn signal when the double flash switch is closed, so that the left turn signal and the right turn signal flash at a double flash frequency; The dual flash chip is also used to power the left turn light or the right turn light electrically connected to the first connection end when the dual flash light switch is closed or disconnected and the first connection end of the turn signal switch is electrically connected to the second connection end or the third connection end, and to make the left turn light or the right turn light flash at the turning frequency accordingly.
10. The steering-priority lighting control circuit for an electric vehicle according to any one of claims 1 to 9, characterized in that: The dual flash chip is arranged on the instrument PCB of the electric vehicle.