Single-line identification circuit capable of identifying charger access and realizing one-key startup

Abstract

The utility model relates to the technical field of electric scooters, electric bicycles, electric mopeds, electric motorcycles and the like, in particular to a single-wire identification circuit capable of identifying the connection of a charger and starting up by one key. The utility model relates to a single-line identification circuit capable of identifying charger access and starting up by one key, which comprises an instrument, a battery and a charger, and is characterized in that a 3.3 V power supply module, an instrument internal circuit and a first resistor are arranged in the instrument; a charger internal circuit, a second resistor, a third resistor and a first power tube are arranged in the charger; the battery is internally provided with a 3.3 V power supply control circuit, an interrupt processing circuit, a battery internal MCU, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor and a diode. Compared with the prior art, only one signal line is needed, an instrument and a charger do not need to be changed, insertion of the charger can be recognized, one-key starting can be achieved, use of wire harnesses is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical fields of electric scooters, electric bicycles, electric assisted vehicles, electric motorcycles, etc., and specifically relates to a single-line recognition circuit that can both recognize the access of a charger and power on with one key. Background Art

[0002] The discharge button of the battery pack of an E-Bike is on the battery. Every time after shutdown and then using it, the button on the battery needs to be pressed to turn on the output. Now, with the power button on the instrument, the trend of powering on the whole system with one key is becoming more and more obvious. However, the existing power-on-with-one-key signal and charging handshake signal respectively require a recognition line. In actual use, two recognition lines are a bit cumbersome. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a single-line recognition circuit that can both recognize the access of a charger and power on with one key. Only one signal line is needed, and there is no need to modify the instrument and the charger. It can not only recognize the insertion of the charger, but also power on with one key, reducing the use of wire harnesses and improving production efficiency.

[0004] To achieve the above purpose, a single-line recognition circuit that can both recognize the access of a charger and power on with one key is designed, including an instrument, a battery, and a charger, and is characterized in that:

[0005] The instrument internally is provided with a 3.3V power supply module, an internal circuit of the instrument, and a first resistor;

[0006] The charger internally is provided with an internal circuit of the charger, a second resistor, a third resistor, and a first power transistor;

[0007] The battery internally is provided with a 3.3V power supply control circuit, an interrupt processing circuit, an internal MCU of the battery, a first capacitor, a second capacitor, a fourth resistor, a fifth resistor, and a diode;

[0008] The output end of the 3.3V power supply module in the instrument is connected to one end of the first resistor. The other end of the first resistor is respectively connected to one end of the internal circuit of the instrument, the second resistor and the third resistor in the charger, one end of the first capacitor in the battery, and the cathode of the diode. The other end of the second resistor is connected to one end of the internal circuit of the charger. The other end of the internal circuit of the charger is connected to the gate of the first power transistor. The source of the first power transistor is grounded. The drain electrode of the first power transistor is connected to the other end of the third resistor. The other end of the first capacitor is grounded. The anode of the diode is respectively connected to one end of the fourth resistor, one end of the fifth resistor, and the interrupt processing circuit. The other end of the fourth resistor is connected to the 3.3V power supply control circuit. The other end of the fifth resistor is respectively connected to one end of the second capacitor and the internal MCU of the battery. The internal MCU of the battery is connected to the interrupt processing circuit. The other end of the second capacitor is grounded.

[0009] The interruption processing circuit inside the battery described above includes a comparator, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, and a fifth capacitor. One end of the fourth resistor is connected to one end of the seventh resistor, and the other end of the seventh resistor is respectively connected to one end of the fourth capacitor and the positive input terminal of the comparator; the negative input terminal of the comparator is respectively connected to one end of the sixth resistor, one end of the ninth resistor, and one end of the third capacitor. The other end of the sixth resistor is respectively connected to the MCU_3V3 voltage, one end of the fifth capacitor, the positive power supply terminal of the comparator, and one end of the eighth resistor. The other end of the eighth resistor is respectively connected to the output terminal of the comparator and the internal MCU of the battery; the negative power supply terminal of the comparator, the other end of the third capacitor, the other end of the fourth capacitor, the other end of the fifth capacitor, and the other end of the resistor are combined and grounded.

[0010] The 3.3V power supply control circuit inside the battery described above includes a second power transistor, a third power transistor, a tenth resistor, an eleventh resistor, and a twelfth resistor. The other end of the fourth resistor is connected to the source electrode of the second power transistor, and the drain electrode of the second power transistor is respectively connected to the MCU_3V3 voltage and one end of the tenth resistor. The other end of the tenth resistor is respectively connected to the gate electrode of the second power transistor and the drain electrode of the third power transistor. The gate electrode of the third power transistor is respectively connected to one end of the eleventh resistor and one end of the twelfth resistor. The other end of the eleventh resistor is connected to the Wake_EN control signal, and the other end of the twelfth resistor and the source electrode of the third power transistor are combined and grounded.

[0011] The cathode of the diode described above is connected to one end of a thirteenth resistor, and the other end of the thirteenth resistor is connected to the instrument.

[0012] The other end of the fifth resistor described above is connected to one end of a bidirectional diode, and the other end of the bidirectional diode is grounded.

[0013] Compared with the prior art, the present utility model provides a single-wire recognition circuit that can both recognize the access of a charger and power on with one key. Only one signal wire is required, and there is no need to modify the instrument and the charger. It can not only recognize the insertion of the charger but also power on with one key, reducing the use of wire harnesses and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall circuit framework of the present utility model.

[0015] Figure 2 It is a circuit diagram of the 3.3V power supply control circuit and the interruption processing circuit in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further describes the present utility model with reference to the drawings.

[0017] As Figure 1 , Figure 2As shown, inside the meter, there is a 3.3V power supply module, the internal circuit of the meter, and the first resistor R1.

[0018] Inside the charger, there is the internal circuit of the charger, the second resistor R2, the third resistor R3, and the first power transistor Q1.

[0019] Inside the battery, there is a 3.3V power supply control circuit, an interrupt handling circuit, the internal MCU of the battery, the first capacitor C1, the second capacitor C2, the fourth resistor R4, the fifth resistor R5, and the diode D1.

[0020] The output terminal of the 3.3V power supply module inside the meter is connected to one end of the first resistor R1. The other end of the first resistor R1 is respectively connected to one end of the internal circuit of the meter, the second resistor R2 and the third resistor R3 inside the charger, one end of the first capacitor C1 inside the battery, and the cathode of the diode D1. The other end of the second resistor R2 is connected to one end of the internal circuit of the charger. The other end of the internal circuit of the charger is connected to the gate of the first power transistor Q1. The source of the first power transistor Q1 is grounded. The drain electrode of the first power transistor Q1 is connected to the other end of the third resistor R3. The other end of the first capacitor C1 is grounded. The anode of the diode D1 is respectively connected to one end of the fourth resistor R4, one end of the fifth resistor R5, and the interrupt handling circuit. The other end of the fourth resistor R4 is connected to the 3.3V power supply control circuit. The other end of the fifth resistor R5 is respectively connected to one end of the second capacitor C2 and the internal MCU of the battery. The internal MCU of the battery is connected to the interrupt handling circuit. The other end of the second capacitor C2 is grounded.

[0021] The interrupt handling circuit inside the battery includes a comparator U1, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5. One end of the fourth resistor R4 is connected to one end of the seventh resistor R7. The other end of the seventh resistor R7 is respectively connected to one end of the fourth capacitor C4 and the positive input terminal of the comparator U1. The negative input terminal of the comparator U1 is respectively connected to one end of the sixth resistor R6, one end of the ninth resistor R9, and one end of the third capacitor C3. The other end of the sixth resistor R6 is respectively connected to the MCU_3V3 voltage, one end of the fifth capacitor C5, the positive power supply of the comparator U1, and one end of the eighth resistor R8. The other end of the eighth resistor R8 is respectively connected to the output terminal of the comparator U1 and the internal MCU of the battery. The negative power supply of the comparator U1, the other end of the third capacitor C3, the other end of the fourth capacitor C4, the other end of the fifth capacitor C5, and the other end of the resistor R9 are combined and grounded.

[0022] The 3.3V power supply control circuit inside the battery includes the second power transistor Q2, the third power transistor Q3, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12. The other end of the fourth resistor R4 is connected to the source electrode of the second power transistor Q2. The drain electrode of the second power transistor Q2 is respectively connected to the MCU_3V3 voltage and one end of the tenth resistor R10. The other end of the tenth resistor R10 is respectively connected to the gate electrode of the second power transistor Q2 and the drain electrode of the third power transistor Q3. The gate electrode of the third power transistor Q3 is respectively connected to one end of the eleventh resistor R11 and one end of the twelfth resistor R12. The other end of the eleventh resistor R11 is connected to the Wake_EN control signal. The other end of the twelfth resistor R12 and the source electrode of the third power transistor Q3 are combined and grounded.

[0023] The cathode of the diode D1 is connected to one end of the thirteenth resistor FM1, and the other end of the thirteenth resistor FM1 is connected to the instrument.

[0024] The other end of the fifth resistor R5 is connected to one end of the bidirectional diode SD1, and the other end of the bidirectional diode SD1 is grounded.

[0025] As Figure 1 shown, the button on the instrument is default connected to GND. When the button is pressed, the CHG_SIG signal is pulled low. At this time, the MCU inside the battery is activated through the interrupt processing circuit, and then through the acquisition circuit composed of the fifth resistor R5 and the second capacitor C2, it judges whether it is a one-key startup signal or a charging signal according to the voltage of V_CS.

[0026] After the charger is connected, the internal circuit of the charger collects the voltage across the second resistor R2 to judge whether it is connected to the battery. If the charger judges that it has been connected to the battery, it turns on the first power transistor Q1. At this time, the MCU of the battery is activated through the interrupt processing circuit, and then judges the connection of the charger according to the voltage on V_CS, thus realizing the bidirectional recognition of the connection of the charger and the battery.

[0027] By default, when V_CS < 0.5V, the button is pressed. When 1.4V < V_CS < 3V, the charger is connected. This value is for reference only and can be adjusted according to the resistance values of the third resistor R3 and the fourth resistor R4.

[0028] As Figure 2 shown, in the 3.3V power supply control circuit, Wake_EN controls the third power transistor Q3 to turn on, and then turns on the second power transistor Q2, and MCU_3V3 pulls up the fourth resistor R4.

[0029] When the battery is under-voltage or has abnormal power consumption, Wake_EN is periodically turned on for monitoring to prevent the battery from being over-discharged and exhausted when the CHG_SIG signal at the port is short-circuited to GND.

[0030] In the interrupt handling circuit, the 3.3V voltage is divided by the sixth resistor R6 and the ninth resistor R9 and supplied to the negative terminal of the comparator U1, which is default set to 2.475V.

[0031] When CHG_SIG is not connected, the positive pole of the diode D1 is pulled up, and WakeUP&CS defaults to output a high level.

[0032] After CHG_SIG is connected, when the meter presses the button or the first power transistor Q1 in the charger is turned on, and after being divided by the third resistor R3 in the charger, the anode of the diode D1 will be lower than the 2.475V set by the negative terminal of the comparator U1, and WakeUP&CS outputs a low level, indicating that the device is recognized as powered on or the charger is inserted.

Claims

1. A single-wire recognition circuit that can both recognize the connection of a charger and power on with one key, including an instrument, a battery, and a charger, characterized in that: The instrument internally is provided with a 3.3V power module, an internal circuit of the instrument, and a first resistor (R1); The charger internally is provided with an internal circuit of the charger, a second resistor (R2), a third resistor (R3), and a first power transistor (Q1); The battery internally is provided with a 3.3V power control circuit, an interrupt processing circuit, an internal MCU of the battery, a first capacitor (C1), a second capacitor (C2), a fourth resistor (R4), a fifth resistor (R5), and a diode (D1); The output end of the 3.3V power module in the instrument is connected to one end of the first resistor (R1). The other end of the first resistor (R1) is respectively connected to the internal circuit of the instrument, one end of the second resistor (R2) and the third resistor (R3) in the charger, one end of the first capacitor (C1) in the battery, and the cathode of the diode (D1). The other end of the second resistor (R2) is connected to one end of the internal circuit of the charger. The other end of the internal circuit of the charger is connected to the gate of the first power transistor (Q1). The source of the first power transistor (Q1) is grounded. The drain electrode of the first power transistor (Q1) is connected to the other end of the third resistor (R3). The other end of the first capacitor (C1) is grounded. The anode of the diode (D1) is respectively connected to one end of the fourth resistor (R4), one end of the fifth resistor (R5), and the interrupt processing circuit. The other end of the fourth resistor (R4) is connected to the 3.3V power control circuit. The other end of the fifth resistor (R5) is respectively connected to one end of the second capacitor (C2) and the internal MCU of the battery. The internal MCU of the battery is connected to the interrupt processing circuit. The other end of the second capacitor (C2) is grounded.

2. The single-wire recognition circuit capable of both recognizing the charger connection and powering on with one key according to claim 1, wherein: The interrupt processing circuit in the battery includes a comparator (U1), a sixth resistor (R6), a seventh resistor (R7), an eighth resistor (R8), a ninth resistor (R9), a third capacitor (C3), a fourth capacitor (C4), and a fifth capacitor (C5). One end of the fourth resistor (R4) is connected to one end of the seventh resistor (R7). The other end of the seventh resistor (R7) is respectively connected to one end of the fourth capacitor (C4) and the positive input terminal of the comparator (U1). The negative input terminal of the comparator (U1) is respectively connected to one end of the sixth resistor (R6), one end of the ninth resistor (R9), and one end of the third capacitor (C3). The other end of the sixth resistor (R6) is respectively connected to the MCU_3V3 voltage, one end of the fifth capacitor (C5), the positive power supply of the comparator (U1), and one end of the eighth resistor (R8). The other end of the eighth resistor (R8) is respectively connected to the output terminal of the comparator (U1) and the internal MCU of the battery. The negative power supply of the comparator (U1), the other end of the third capacitor (C3), the other end of the fourth capacitor (C), the other end of the fifth capacitor (C5), and the other end of the resistor (R9) are combined and grounded.

3. The single-wire recognition circuit capable of both recognizing charger access and powering on with one key according to claim 1, wherein: The 3.3V power supply control circuit inside the battery includes a second power transistor (Q2), a third power transistor (Q3), a tenth resistor (R10), an eleventh resistor (R11), a twelfth resistor (R12). The other end of the fourth resistor (R4) is connected to the source electrode of the second power transistor (Q2). The drain electrode of the second power transistor (Q2) is respectively connected to the MCU_3V3 voltage and one end of the tenth resistor (R10). The other end of the tenth resistor (R10) is respectively connected to the gate of the second power transistor (Q2) and the drain electrode of the third power transistor (Q3). The gate of the third power transistor (Q3) is respectively connected to one end of the eleventh resistor (R11) and one end of the twelfth resistor (R12). The other end of the eleventh resistor (R11) is connected to the Wake_EN control signal. The other end of the twelfth resistor (R12) and the source electrode of the third power transistor (Q3) are combined and grounded.

4. A single-wire recognition circuit that can both recognize the connection of a charger and power on with one key, characterized in that: The cathode of the diode (D1) is connected to one end of the thirteenth resistor (FM1), and the other end of the thirteenth resistor (FM1) is connected to the instrument.

5. The single-wire recognition circuit capable of both recognizing charger access and turning on the machine with one key according to claim 1, wherein: The other end of the fifth resistor (R5) is connected to one end of the bidirectional diode (SD1), and the other end of the bidirectional diode (SD1) is grounded.

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