An AC-based scheduled charging and vehicle wake-up circuit

Abstract

This invention discloses an AC charging reservation and vehicle wake-up circuit, relating to the field of AC charging reservation and vehicle wake-up technology. It includes a guidance generation circuit and a guidance control circuit, comprising resistors R5, R6, R7, R8, R9, R10, R11, and R12; capacitors C5, C6, C7, C8, and C9; operational amplifier U5; diodes D5 and D6; relays K5 and K6; diodes D7 and D8; resistors R13, R14, R15, and R16; diodes C10 and C11; and transistors Q5 and Q6. Based on a traditional AC charging pile circuit, it adds control switches S4 and S5 to guide and control the AC charging pile, thereby achieving the vehicle wake-up function. This invention realizes both scheduled charging and wake-up of the electric vehicle charging system, as well as guidance control of the charging pile.

Description

Technical Field

[0001] This invention relates to the field of AC scheduled charging and vehicle wake-up technology, and in particular to an AC scheduled charging and vehicle wake-up circuit. Background Technology

[0002] I. In today's rapidly developing technological world, automobiles have become an indispensable means of transportation. However, the rapid depletion of non-renewable energy sources has made clean energy electric vehicles increasingly popular. Despite their pollution-free nature, electric vehicles still present some challenges, the most significant being the issue of battery charging.

[0003] Second, the main drawback is that although high-power charging technology and automatic power-off technology are relatively mature, the inability to schedule charging for electric vehicles wastes time. Furthermore, if one wishes to save costs by charging during off-peak electricity hours, they must return to the parking space at the scheduled time to charge. Domestic standards follow GB / T18487, but because they only have two signal lines (CP and CC) and lack the ability to transmit traditional signals, low-cost scheduled charging is not possible. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an AC scheduled charging and vehicle wake-up circuit that addresses the shortcomings of the prior art. This circuit enables scheduled charging, wakes up the electric vehicle charging system, and provides guidance and control for the charging pile.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An AC scheduled charging and vehicle wake-up circuit includes a guidance generation circuit and a guidance control circuit; the guidance generation circuit includes resistors R5, R6, R7, R8, R9, R10, R11, and R12, capacitors C5, C6, C7, C8, and C9, operational amplifier U5, diode D5, and diode D6.

[0007] The MCU_PWM terminal is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 3 of operational amplifier U5. The +3.3V voltage terminal is connected to one end of resistor R6, and the other end of resistor R6 is connected to one end of resistor R8 and pin 2 of operational amplifier U5. The other end of resistor R8 is grounded. The CP_OUT terminal is connected to the anode of diode D5, and the cathode of diode D5 is connected to one end of resistor R9. The other end of resistor R9 is connected to one end of capacitor C7, one end of resistor R11, and pin 5 of operational amplifier U5. The other ends of capacitor C7 and resistor R11 are grounded. Pin 6 of operational amplifier U5 is connected to pins 7 and 8 of operational amplifier U5. One end of resistor R10 is connected to one end of resistor R12, one end of diode D6, and the CAR_PWM terminal, respectively. The other end of diode D6 is connected to the +3.3V voltage terminal and grounded. Pin 4 of operational amplifier U5 is connected to one end of capacitor C8, one end of capacitor C9, and the -12V voltage terminal, respectively. The other ends of capacitor C8 and capacitor C9 are grounded, respectively. Pin 1 of operational amplifier U5 is connected to one end of resistor R7, and the other end of resistor R7 is connected to the CP_OUT terminal, respectively. Pin 8 of operational amplifier U5 is connected to one end of capacitor C5, one end of capacitor C6, and the +12V voltage terminal, respectively. The other ends of capacitor C5 and capacitor C6 are grounded, respectively.

[0008] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the guidance control circuit includes relay K5, relay K6, diode D7, diode D8, resistor R13, resistor R14, resistor R15, resistor R16, diode C10, diode C11, transistor Q5, and transistor Q6.

[0009] The +5V voltage terminal is connected to the cathode of diode D7 and pin 2 of relay K5. Pin 3 of relay K5 is connected to the CP_OUT terminal. Pin 1 of relay K5 is connected to the CP_CON terminal. Pin 5 of relay K5 is connected to the anode of diode D7 and the collector of transistor Q5. The base of transistor Q5 is connected to one end of resistor R13, one end of resistor R16, and one end of diode C11. The other ends of resistor R16 and diode C11 are grounded. The other end of resistor R13 is connected to the CP_RELAY terminal. The emitter of transistor Q5 is grounded.

[0010] The +5V voltage terminal is connected to the cathode of diode D8 and pin 2 of relay K6. Pin 3 of relay K6 is grounded. Pin 5 of relay K6 is connected to the anode of diode D8 and the collector of transistor Q6. The base of transistor Q6 is connected to one end of resistor R14, one end of resistor R15, and one end of diode C10. The other ends of resistor R15 and diode C10 are grounded. The other end of resistor R14 is connected to the CC_RELAY terminal. The emitter of transistor Q5 is grounded.

[0011] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the operational amplifier U5 is a rail-to-rail operational amplifier.

[0012] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the diode D5 is a Schottky diode.

[0013] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the diode D6 is a Schottky dual diode.

[0014] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the diode D7 is a freewheeling diode.

[0015] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the diode D8 is a freewheeling diode.

[0016] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the CP - RELAY and CC - The RELAY terminals are connected to the microcontroller.

[0017] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the resistor R9 is a voltage divider resistor.

[0018] As a further preferred embodiment of the AC scheduled charging and vehicle wake-up circuit of the present invention, the resistor R11 is a voltage divider resistor.

[0019] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects:

[0020] 1. The present invention provides an AC scheduled charging and vehicle wake-up circuit, comprising a guidance generation circuit and a guidance control circuit. Based on the traditional AC charging pile circuit, a circuit with control switches S4 and S5 is added to guide and control the AC charging pile, thereby realizing the vehicle wake-up function.

[0021] 2. This invention enables scheduled charging, as well as activating the charging of electric vehicles and guiding and controlling the charging piles.

[0022] 3. The present invention provides an AC charging reservation and vehicle wake-up circuit. The AC charging pile is based on the traditional AC charging pile circuit, and a circuit with added relays K5 and K6 is added to guide and control the AC charging pile, thereby realizing the vehicle wake-up function.

[0023] 4. The microcontroller is connected to the positive input terminal +INA of U5 via resistor R5. It compares the voltage at the negative input terminal -INA, which is composed of resistors R6 and R8. If the voltage at +INA is greater than the voltage at -INA, the op-amp OUTA outputs +12V; otherwise, it outputs -12V. OUTA is connected to CP_OUT via resistor R7. After passing through diode D5, only the positive voltage +12V can pass through CP_OUT. Then, after being divided by resistors R9 and R11, it is connected to +INB. The voltage amplitude is limited to below +3.3V. After voltage follower, the output terminal OUTB is connected to CAR_PWM via R10. The microcontroller's AD converter samples CAR_PWM and calculates the voltage magnitude to determine whether the charging connection device is connected, whether the vehicle can be charged, and other statuses.

[0024] 5. In this invention, CP_RELAY and CC_RELAY are connected to a microcontroller. When CP_RELAY is high, relay K5 is activated, and CP_CON and CP_OUT are shorted together. When CC_RELAY is high, relay K6 is activated, and CC_CON is disconnected from GND. When CC_RELAY is low, relay K6 is not activated, and CC_CON and GND are shorted together. Attached Figure Description

[0025] Figure 1 This is a circuit diagram of the guiding generation circuit of the present invention;

[0026] Figure 2 This is a circuit diagram of the guidance and control circuit of the present invention;

[0027] Figure 3 This is a block diagram illustrating the vehicle wake-up principle of the present invention. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings:

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] An AC-based scheduled charging and vehicle wake-up circuit includes a guidance generation circuit and a guidance control circuit; it enables scheduled charging while also waking up the electric vehicle and providing guidance control for the charging station.

[0031] like Figure 1 As shown, the guiding generation circuit includes resistors R5, R6, R7, R8, R9, R10, R11, and R12, capacitors C5, C6, C7, C8, and C9, operational amplifier U5, diode D5, and diode D6.

[0032] The MCU-PWM terminal is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 3 of operational amplifier U5. The +3.3V voltage terminal is connected to one end of resistor R6, and the other end of resistor R6 is connected to one end of resistor R8 and pin 2 of operational amplifier U5. The other end of resistor R8 is grounded. The CP_OUT terminal is connected to the anode of diode D5, and the cathode of diode D5 is connected to one end of resistor R9. The other end of resistor R9 is connected to one end of capacitor C7, one end of resistor R11, and pin 5 of operational amplifier U5. The other ends of capacitor C7 and resistor R11 are grounded. Pin 6 of operational amplifier U5 is connected to pins 7 and 8 of operational amplifier U5. One end of resistor R10 is connected to one end of resistor R12, one end of diode D6, and the CAR_PWM terminal, respectively. The other end of diode D6 is connected to the +3.3V voltage terminal and grounded. Pin 4 of operational amplifier U5 is connected to one end of capacitor C8, one end of capacitor C9, and the -12V voltage terminal, respectively. The other ends of capacitor C8 and capacitor C9 are grounded, respectively. Pin 1 of operational amplifier U5 is connected to one end of resistor R7, and the other end of resistor R7 is connected to the CP_OUT terminal, respectively. Pin 8 of operational amplifier U5 is connected to one end of capacitor C5, one end of capacitor C6, and the +12V voltage terminal, respectively. The other ends of capacitor C5 and capacitor C6 are grounded, respectively.

[0033] The microcontroller is connected to the positive input terminal +INA of U5 via resistor R5. It compares this voltage with the negative input terminal -INA, which is formed by resistors R6 and R8. If the voltage at +INA is greater than the voltage at -INA, the op-amp OUTA outputs +12V; otherwise, it outputs -12V. OUTA is connected to CP_OUT via resistor R7. CP_OUT, after passing through diode D5, only allows the positive voltage +12V to pass through. Then, after voltage division by resistors R9 and R11, it is connected to +INB, limiting the voltage amplitude to below +3.3V. The voltage follower output terminal OUTB is then connected to CAR_PWM via resistor R10. The microcontroller's AD converter samples CAR_PWM and calculates the voltage magnitude to determine whether the charging connection is connected and whether the vehicle can be charged.

[0034] like Figure 2 As shown, the guidance control circuit includes relays K5 and K6, diodes D7 and D8, resistors R13, R14, R15, and R16, diodes C10 and C11, and transistors Q5 and Q6.

[0035] The +5V voltage terminal is connected to the cathode of diode D7 and pin 2 of relay K5. Pin 3 of relay K5 is connected to the CP_OUT terminal. Pin 1 of relay K5 is connected to the CP_CON terminal. Pin 5 of relay K5 is connected to the anode of diode D7 and the collector of transistor Q5. The base of transistor Q5 is connected to one end of resistor R13, one end of resistor R16, and one end of diode C11. The other ends of resistor R16 and diode C11 are grounded. The other end of resistor R13 is connected to the CP_RELAY terminal. The emitter of transistor Q5 is grounded.

[0036] The +5V voltage terminal is connected to the cathode of diode D8 and pin 2 of relay K6. Pin 3 of relay K6 is grounded. Pin 5 of relay K6 is connected to the anode of diode D8 and the collector of transistor Q6. The base of transistor Q6 is connected to one end of resistor R14, one end of resistor R15, and one end of diode C10. The other ends of resistor R15 and diode C10 are grounded. The other end of resistor R14 is connected to the CC_RELAY terminal. The emitter of transistor Q5 is grounded.

[0037] In this invention, CP_RELAY and CC_RELAY are connected to a microcontroller. When CP_RELAY is high, relay K5 is activated, and CP_CON and CP_OUT are shorted together. When CC_RELAY is high, relay K6 is activated, and CC_CON is disconnected from GND. When CC_RELAY is low, relay K6 is not activated, and CC_CON and GND are shorted together.

[0038] Preferably, the operational amplifier U5 is a rail-to-rail operational amplifier.

[0039] Preferably, the diode D5 is a Schottky diode.

[0040] Preferably, the diode D6 is a Schottky dual diode.

[0041] Preferably, the diode D7 is a freewheeling diode.

[0042] Preferably, the diode D8 is a freewheeling diode.

[0043] Preferably, the CP_RELAY terminal and the CC_RELAY terminal are respectively connected to a microcontroller.

[0044] Preferably, the resistor R9 is a voltage divider resistor.

[0045] Preferably, the resistor R11 is a voltage divider resistor.

[0046] like Figure 3 As shown, switch K1 connects the live wire of the power supply equipment and the live wire of the electric vehicle, and switch K2 connects the neutral wire of the power supply equipment and the neutral wire of the electric vehicle; the PWM terminal of the power supply control device is connected to one end of resistor R1 through switch S1, the other end of R1 is connected to switch S5, and the other end of switch S5 is connected to the control lead line CP of the electric vehicle; one end of switch S4 is connected to the ground terminal of the power supply equipment, and the other end is used to connect to the connection confirmation line CC inside the electric vehicle. Among them, switch S1 is a normally closed switch, switch S2 is a normally open switch, switch S3 is a normally open switch, switch S4 is a normally closed switch, and switch S5 is a normally open switch. Among them, switch S4 is equivalent to relay K6 in Figure (2), switch S5 is equivalent to relay K5 in Figure (2), and the PWM of the power supply control device is equivalent to CP_OUT output by the CP generation circuit.

[0047] When a charging appointment is required, the start time of the appointment is entered on the human-machine interface of the AC charging pile, and then click "Start". When the appointment time arrives, the AC charging pile controller detects that the electricity price is low, and the power supply control device disconnects switches S4 and S5. After a 3-second delay, switches S4 and S5 are closed again. When the power supply control device detects that the voltage at detection point 1 is not 12V, switch S1 switches to the PWM terminal of the power supply control device and sends a PWM signal. When the power supply control device detects a valid PWM signal at detection point 1, it closes switches K1 and K2 to connect the power input of the electric vehicle's on-board charger. After charging is completed, when the power supply control device detects that the voltage at detection point 1 is not 6V, it disconnects switches K1 and K2 to disconnect the power input of the electric vehicle's on-board charger.

[0048] While enabling scheduled charging, it also enables the activation of electric vehicle charging and the guidance and control of charging piles.

[0049] Compared with the prior art, the advantages of this application are: the AC charging pile of this application adds a circuit with control switches S4 and S5 to the traditional AC charging pile circuit to guide and control the AC charging pile, thereby realizing the vehicle wake-up function.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An AC scheduled charging and vehicle wake-up circuit, characterized in that: The system includes a guidance generation circuit and a guidance control circuit. The guidance generation circuit comprises resistors R5, R6, R7, R8, R9, R10, R11, and R12; capacitors C5, C6, C7, C8, and C9; operational amplifier U5; and diodes D5 and D6. The MCU_PWM terminal is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 3 of operational amplifier U5. The +3.3V voltage terminal is connected to one end of resistor R6, and the other end of resistor R6 is connected to one end of resistor R8 and pin 2 of operational amplifier U5. The other end of resistor R8 is grounded. The CP_OUT terminal is connected to the anode of diode D5, and the cathode of diode D5 is connected to one end of resistor R9. The other end of resistor R9 is connected to one end of capacitor C7, one end of resistor R11, and the operational amplifier U5. Pin 5 of U5, the other end of capacitor C7, and the other end of resistor R11 are grounded respectively. Pin 6 of operational amplifier U5 is connected to pin 7 of operational amplifier U5 and one end of resistor R10. The other end of resistor R10 is connected to one end of resistor R12, one end of diode D6, and the CAR_PWM terminal. The other end of diode D6 is connected to the +3.3V voltage terminal and grounded. Pin 4 of operational amplifier U5 is connected to one end of capacitor C8, one end of capacitor C9, and the 12V voltage terminal. The other ends of capacitor C8 and C9 are grounded respectively. Pin 1 of operational amplifier U5 is connected to one end of resistor R7. The other end of resistor R7 is connected to the CP_OUT terminal. Pin 8 of operational amplifier U5 is connected to one end of capacitor C5, one end of capacitor C6, and the +12V voltage terminal. The other ends of capacitor C5 and C6 are grounded respectively. The guidance control circuit includes relays K5 and K6, diodes D7 and D8, resistors R13, R14, R15, and R16, diodes C10 and C11, and transistors Q5 and Q6. The +5V voltage terminal is connected to the cathode of diode D7 and pin 2 of relay K5. Pin 3 of relay K5 is connected to the CP_OUT terminal, pin 1 of relay K5 is connected to the CP_CON terminal, pin 5 of relay K5 is connected to the anode of diode D7 and the collector of transistor Q5, and the base of transistor Q5 is connected to one end of resistor R13, one end of resistor R16, and one end of diode C11. The other end of resistor R16 and the other end of diode C11 are grounded respectively. The other end of resistor R13 is connected to the CP_RELAY terminal. The emitter of transistor Q5 is grounded. The +5V voltage terminal is connected to the cathode of diode D8 and pin 2 of relay K6 respectively. Pin 3 of relay K6 is grounded. Pin 5 of relay K6 is connected to the anode of diode D8 and the collector of transistor Q6 respectively. The base of transistor Q6 is connected to one end of resistor R14, one end of resistor R15, and one end of diode C10 respectively. The other end of resistor R15 and the other end of diode C10 are grounded respectively. The other end of resistor R14 is connected to the CC_RELAY terminal. The emitter of transistor Q5 is grounded.

2. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The operational amplifier U5 is a rail-to-rail operational amplifier.

3. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The diode D5 is a Schottky diode.

4. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The diode D6 is a Schottky dual diode.

5. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The diode D7 is a freewheeling diode.

6. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The diode D8 is a freewheeling diode.

7. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The CP_RELAY and CC_RELAY terminals are respectively connected to the microcontroller.

8. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The resistor R9 is a voltage divider resistor.

9. The AC scheduled charging and vehicle wake-up circuit according to claim 1, characterized in that: The resistor R11 is a voltage divider resistor.

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