A single-port control device for electric vehicle turn signal control

Abstract

The utility model relates to the technical field of electric vehicle turn signal lamps, and in particular to a single-port control device for controlling the turn signal lamps of an electric vehicle, the device comprising a power supply, a turn signal lamp, a switch module, a turn signal control module and a turn signal interface, the turn signal control module is connected to one end of the switch module through the turn signal interface, the other end of the switch module is connected to the negative pole of the turn signal lamp, and the positive pole of the turn signal lamp is connected to the power supply; the conduction and disconnection of the turn signal lamp and the turn signal lamp are controlled by closing or disconnecting the switch module; the turn signal lamp comprises a left turn signal lamp and a right turn signal lamp, and the left turn signal lamp and the right turn signal lamp are connected in parallel between the power supply and the switch module. The single-port control device for controlling the turn signal lamp of an electric vehicle provided by the utility model can complete the control of the turn signal lamp by using only one port, effectively simplifying the external wiring harness of the electric vehicle, improving the aesthetics of the electric vehicle, and reducing the manufacturing cost of the electric vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle turn signal lamps, in particular to a single-port control device for controlling electric vehicle turn signal lamps. Background Art

[0002] The turn signal control device flasher of the existing electric vehicle generally adopts a multi-port control method. The turn signal control device is provided with two signal detection ports and two drive output ports. When the user turns on the left turn or the right turn during the use of the electric vehicle, this device detects the left turn / right turn switch signal, and then executes the output current at the corresponding port to light up the corresponding turn signal. At the same time, the sound device inside the microcontroller unit (MCU) control device emits a turn prompt sound.

[0003] The existing turn signal control device of an electric vehicle has a large number of interfaces, so the external connection lines of the electric vehicle are complicated, which is not only unsightly, but also increases the manufacturing cost of the electric vehicle.

[0004] Therefore, how to provide a control device that can complete the turning of a turn signal using only one port is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model provides a single-port control device for controlling the turn signal lamp of an electric vehicle.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A single-port control device for controlling a turn signal of an electric vehicle, comprising: a power supply, a turn signal, a switch module, a turn signal control module and a turn signal interface, wherein the turn signal control module is connected to one end of the switch module through the turn signal interface, the other end of the switch module is connected to the negative pole of the turn signal, and the positive pole of the turn signal is connected to the power supply;

[0008] Wherein, the turning on and off of the steering control module and the turning light are controlled by closing or opening the switch module;

[0009] The turn signal lamp comprises a left turn signal lamp and a right turn signal lamp, and the left turn signal lamp and the right turn signal lamp are connected in parallel between the power supply and the switch module.

[0010] Further, the steering control module includes a driving circuit, a micro control unit, an AD sampling unit and a scanning circuit, one end of the driving circuit is connected to the steering interface, the other end of the driving circuit is connected to the micro control unit, one end of the scanning circuit is connected between the driving circuit and the steering interface, the other end of the scanning circuit is connected to one end of the AD sampling unit, and the other end of the AD sampling unit is connected to the micro control unit;

[0011] It also includes a first ground wire and a second ground wire, wherein the first ground wire is connected to the driving circuit, and the second ground wire is connected to the micro control unit.

[0012] Furthermore, it also includes a sound module, which is arranged between the micro control unit and the second ground line.

[0013] Furthermore, the switch module is a steering toggle switch, and the steering control module and the left turn signal or the right turn signal are turned on or off by turning the steering toggle switch.

[0014] Furthermore, the micro control unit stores multiple types of preset power supply voltages.

[0015] Furthermore, the preset power supply voltage setting types include 12V, 33V, 48V, 60V and 72V.

[0016] Furthermore, the AD sampling unit includes a high-precision voltage-dividing resistor or an analog signal amplifier.

[0017] Furthermore, the sound-generating module is a buzzer.

[0018] The above one or more technical solutions in the embodiments of the utility model have at least one of the following technical effects:

[0019] The utility model provides a single-port control device for an electric vehicle turn signal lamp, which can complete the control of the turn signal lamp using only one port, greatly simplifies the external wiring harness, improves the appearance of the electric vehicle, reduces the overall manufacturing cost of the electric vehicle, and thus improves the market competitiveness of the electric vehicle.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The utility model is a schematic diagram of the composition of a single-port control device for controlling a turn signal light of an electric vehicle.

[0023] Figure 2 The utility model provides a circuit schematic diagram of a single-port control device for controlling a turn signal lamp of an electric vehicle.

[0024] Figure 3 It is a comparison voltage process diagram of the AD sampling unit provided by the utility model.

[0025] Figure 4 This is a voltage comparison principle diagram of the AD sampling unit provided by the utility model.

[0026] Figure 5 The invention is a schematic diagram of the composition of a turn signal control device of an electric vehicle in the prior art. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The following embodiments are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0028] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] In the description of this specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0030] The working process of the turn signal control device of the existing electric vehicle is as follows: Figure 5 As shown, the operator closes the steering switch, and the switch connects the detection circuit to the effective level signal. After the MCU recognizes the effective signal through the detection circuit, it controls the drive circuit part to intermittently output a high-level power supply voltage at a fixed frequency to the positive pole of the corresponding turn signal, and the turn signal lights up and flashes. At the same time, the MCU drives the sound device to emit a turn prompt sound. When the operator toggles the switch to switch left and right turns, the effective signal position changes, and the MCU detects the corresponding signal and changes the drive output port to complete the switch of the turn signal flashing. When the switch is in the neutral position, that is, when the effective level is not connected to the left and right turns, the MCU detects that there is no signal, stops the drive circuit, and the turn signals are all off, stops driving the sound device, and there is no prompt sound. The existing electric vehicle turn signal control device has a large number of interfaces and complex external connection lines. Therefore, how to simplify the wiring harness of the turn signal control device is a technical problem that needs to be solved at present.

[0031] like Figure 1 As shown, the utility model provides a single-port control device for controlling the turn signal of an electric vehicle, comprising: a power supply, a turn signal, a switch module, a turn signal control module and a turn signal interface, wherein the turn signal control module is connected to one end of the switch module through the turn signal interface, the other end of the switch module is connected to the negative pole of the turn signal, and the positive pole of the turn signal is connected to the power supply;

[0032] Wherein, the turning on and off of the steering control module and the turning light are controlled by closing or opening the switch module;

[0033] The turn signal lamp comprises a left turn signal lamp and a right turn signal lamp, and the left turn signal lamp and the right turn signal lamp are connected in parallel between the power supply and the switch module.

[0034] The utility model provides a single-port control device for controlling a turn signal lamp of an electric vehicle, which can complete the control of the turn signal lamp by using only one port, thereby effectively simplifying the external wiring harness.

[0035] According to a specific embodiment provided by the utility model, a single-port control device for controlling the turn signal of an electric vehicle includes: a power supply, a left turn signal, a right turn signal, a turn signal toggle switch, a turn signal interface and a turn signal control module, wherein the turn signal control module is connected to the negative electrode of the turn signal through the turn signal interface through the toggle switch, and the positive electrode of the turn signal is connected to the power supply voltage (Volt Current Condenser, VCC), and the power supply voltage is provided by the power supply. The scanning circuit connects the AD sampling unit (connected for 0.5ms) to the steering interface at a fixed frequency, for example, every 200ms. When the turn signal toggle switch is in the neutral position, the steering control module and the turn signal are turned off, and the left turn signal and the right turn signal are both turned off.

[0036] According to a specific embodiment provided by the utility model, the steering control module includes a driving circuit, a micro control unit, an AD sampling unit and a scanning circuit, one end of the driving circuit is connected to the steering interface, the other end of the driving circuit is connected to the micro control unit, one end of the scanning circuit is connected between the driving circuit and the steering interface, the other end of the scanning circuit is connected to one end of the AD sampling unit, and the other end of the AD sampling unit is connected to the micro control unit;

[0037] It also includes a first ground wire and a second ground wire, wherein the first ground wire is connected to the driving circuit, and the second ground wire is connected to the micro control unit.

[0038] Considering that electric vehicles are parked outdoors, water easily accumulates at the switch after rain, and the steering switch is energized for a long time, which will cause electrolytic oxidation corrosion, resulting in reduced switch life and aging failure. The utility model can reduce the voltage loading time and slow down the corrosion rate by setting the scanning circuit.

[0039] The scanning circuit waterproofing process is as follows: After the switch module is flooded, it is equivalent to connecting the two ends of the switch module through the electrolyte in the water. After the current flows through the switch through the turn signal, it flows back to the negative electrode through the scanning circuit and the drive circuit; since the scanning circuit is turned on for a very short time, usually 0.5ms every 200ms, and the duty cycle is 2.5 thousandths, the amount of electricity flowing through the scanning circuit is very small, and because water has a large resistance, the level reaching the AD sampling unit generally cannot reach the matching turn signal voltage type range, and the MCU will judge it as an abnormal mismatch state, and will not turn on the steering drive circuit part, and no current will flow through the drive circuit. Only the scanning circuit part with a very short opening time is left, and the average current is very small, which greatly reduces the electrolysis speed of the switch when it enters the water and prolongs the life of the switch.

[0040] The utility model provides a specific implementation method, a circuit design scheme of a single-port control device for controlling the turn signal of an electric vehicle, such as Figure 2 As shown, after the electric vehicle is powered on by the power supply, the MCU controls the 4th foot to output high and low levels with the set frequency duty cycle, and controls the transistor Q2 to be turned on / off through R6. After Q2 is turned on, the base level of Q1 is pulled down through R5. Q1 is turned on to connect the steering interface with the AD sampling unit. The AD sampling unit is reduced by the R2-R3 precision resistor divider ratio and transmitted to the MCU detection port 2. After the MCU recognizes that the level has reached the threshold, it is judged that the steering switch is turned on and the steering function is turned on. The MCU controls the 6th foot to output high and low square wave levels at the flashing frequency, and controls the power transistor Q3 switch through R7. After Q3 is turned on, the negative electrode of the turn signal LED forms a loop with the negative electrode through the R8 current limiting resistor and lights up.

[0041] Specifically, when the operator turns the toggle switch to connect the left turn signal or the right turn signal to the steering control module, the VCC level enters the steering interface through the left turn signal or the right turn signal, and reaches the AD sampling unit after passing through the scanning circuit. After the MCU detects a valid signal through the AD sampling unit, it controls the drive circuit to intermittently conduct at a fixed frequency, for example, a frequency of 60 to 75 Hz, and the negative electrode of the left turn signal or the right turn signal is connected to the external first ground terminal (Ground, GND for short) to light up and flash.

[0042] A specific embodiment provided by the utility model further includes a sound module, which is arranged between the micro control unit and the second ground wire, and preferably, the sound module is a buzzer. When the negative electrode of the left turn signal lamp or the right turn signal lamp is connected to the first ground wire segment, lights up and flashes, the negative electrode of the sound module is connected to the external second ground wire end to sound for warning.

[0043] Taking into account the need to be compatible with multiple types of turn signal lamps with different rated voltages, the utility model provides a specific embodiment in which multiple types of preset power supply voltages are stored in the microcontroller unit. Preferably, the preset power supply voltage setting types include 12V type, 33V type, and 48V type. After the single-port control device for controlling the turn signal of the electric vehicle completes the turn signal for the first time, it will compare the received sampling value of the AD sampling unit with several preset turn signal power supply voltage platform types stored in the MCU. The specific comparison process is as follows: Figure 3As shown, the preset power supply voltage setting type can be any type of 12V, 33V, 48V, 60V, 72V, but is not limited to the above voltage types. For example, if the steering interface level is detected to be 5-12V, it is judged as a 12V turn signal type; the successfully matched type is memorized and stored; when turning on the steering again, the received AD sampling value will be compared with the memorized turn signal power supply type, such as Figure 4 As shown, if the two are consistent, the turn signal drive output and prompt sound are executed. If they do not match, it means that the interference voltage is caused by external fault or water ingress, and the steering drive and sound module are not executed.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A single-port control device for electric vehicle turn signal control, characterized in that: include: A power supply, a turn signal lamp, a switch module, a turn signal control module and a turn signal interface, wherein the turn signal control module is connected to one end of the switch module through the turn signal interface, the other end of the switch module is connected to the negative pole of the turn signal lamp, and the positive pole of the turn signal lamp is connected to the power supply; Wherein, the turning on and off of the steering control module and the turning light are controlled by closing or opening the switch module; The turn signal lamp comprises a left turn signal lamp and a right turn signal lamp, and the left turn signal lamp and the right turn signal lamp are connected in parallel between the power supply and the switch module.

2. A single-port control device for controlling an electric vehicle turn signal as claimed in claim 1, characterized in that: The steering control module includes a driving circuit, a micro control unit, an AD sampling unit and a scanning circuit, one end of the driving circuit is connected to the steering interface, the other end of the driving circuit is connected to the micro control unit, one end of the scanning circuit is connected between the driving circuit and the steering interface, the other end of the scanning circuit is connected to one end of the AD sampling unit, and the other end of the AD sampling unit is connected to the micro control unit; It also includes a first ground wire and a second ground wire, wherein the first ground wire is connected to the driving circuit, and the second ground wire is connected to the micro control unit.

3. A single-port control device for controlling an electric vehicle turn signal as claimed in claim 2, characterized in that: It also includes a sound module, which is arranged between the micro control unit and the second ground line.

4. A single-port control device for controlling a turn signal of an electric vehicle according to any one of claims 1 to 3, characterized in that: The switch module is a steering toggle switch, and the steering control module and the left turn signal or the right turn signal are turned on or off by turning the steering toggle switch.

5. A single-port control device for controlling the turn signal of an electric vehicle as claimed in claim 2 or 3, characterized in that: The micro control unit stores multiple types of preset power supply voltages.

6. A single-port control device for controlling the turn signal of an electric vehicle as claimed in claim 5, characterized in that: The preset supply voltage setting types include 12V, 33V, 48V, 60V and 72V.

7. A single-port control device for controlling an electric vehicle turn signal as claimed in claim 2 or 3, characterized in that: The AD sampling unit includes a high-precision voltage-dividing resistor or an analog signal amplifier.

8. A single-port control device for controlling an electric vehicle turn signal as claimed in claim 3, characterized in that: The sound-generating module is a buzzer.

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