TWI418476B - Energy recharging circuit of electric vehicle - Google Patents

Description

Electric vehicle energy recovery circuit

The invention relates to an electric vehicle energy recovery circuit, in particular to an electric vehicle energy recovery circuit capable of improving the endurance of an electric vehicle.

The conventional electric vehicle mainly uses the power provided by the rechargeable battery as the power source for driving the motor, and the amount of power stored in the rechargeable battery affects the endurance of the electric vehicle. At present, the electric vehicle with the self-generating mode is operated by the motor. The mechanical energy can generate electrical energy, and then the generated electrical energy is recovered into the rechargeable battery, thereby extending the battery life of the rechargeable battery. However, the above method must be maintained above the rated speed of the motor and the generated voltage is higher than the charged battery voltage. In order to recover the generated electric energy to the rechargeable battery, when the motor is braked or decelerated below the rated speed, the electric energy recovery function cannot be exerted.

The main objective of the present invention is to provide an electric vehicle energy recovery circuit including a motor, an energy collecting unit electrically connected to the motor, a boosting circuit, a power battery unit, a driving control unit, and a signal detecting unit. Unit and a relay. The boosting circuit is electrically connected to the energy collecting unit, and has a first connecting end and a second connecting end; the power battery unit has a positive end and a negative end, and the positive end and the negative end are Connecting the first connection end and the second connection end of the booster circuit respectively; the drive control unit is electrically connected to the positive end of the power battery unit; the signal detecting unit is electrically connected to the drive control unit, And detecting a brake power off signal; the relay is electrically connected to the drive control unit, and has a first electrical contact and a second electrical contact, the first electrical contact and the second The electric pick-up point is connected to the motor, and the electric vehicle energy recovery circuit of the present invention can play an electric energy recovery function when the motor brakes or decelerates, and the utility model can greatly improve the endurance power of the power battery unit and improve the battery life of the electric vehicle. mileage.

Please refer to FIG. 1 , which is a preferred embodiment of the present invention. An electric vehicle energy recovery circuit includes a motor 10 , an energy collecting unit 20 electrically connected to the motor 10 , a boosting circuit 30 , and a power The battery unit 40, a driving control unit 50, a signal detecting unit 60, a relay 70, a synchronous switch controller 80, and a reverse flow protection component 90. In the embodiment, the motor 10 is a direct drive motor. The energy collecting unit 20 is composed of a plurality of capacitors C. Preferably, the capacitors C are super (gold) capacitors, and the number of the capacitors C can be adjusted according to power requirements. The boosting circuit 30 is The energy collecting unit 20 is electrically connected to the power collected by the energy collecting unit 20, and the boosting circuit 30 has a first connecting end 30a, a second connecting end 30b, and a The anti-backflow component 31 of the first connecting end 30a has a positive terminal 40a and a negative terminal 40b. In this embodiment, the positive terminal 40a and the negative terminal 40b are respectively connected to the boosting terminal. The first connection of circuit 30 30a and the second connecting end 30b.
Referring to FIG. 1 , the driving control unit 50 is electrically connected to the positive terminal 40 a of the power battery unit 40 . The signal detecting unit 60 is electrically connected to the driving control unit 50 , and the signal detecting unit 60 is electrically connected to the driving control unit 50 . The system can detect a vehicle power failure signal or a deceleration signal, and transmit the measured signal to the driving control unit 50. The relay 70 is electrically connected to the driving control unit 50, and the relay 70 has a first In the present embodiment, the first electrical contact 71 and the second electrical contact 72 are connected to the motor 10, and further, in the present embodiment, the electrical contact 71 and the second electrical contact 72 are connected to the motor 10. In an example, the synchronous switch controller 80 is electrically connected to the signal detecting unit 60, and can control the switching action of the first electrical contact 71 and the second electrical contact 72 of the relay 70. A counter current protection element 90 is disposed between the second electrical contact 72 and the energy harvesting unit 20 to prevent energy from flowing back to the motor 10.
The operation of the electric vehicle energy recovery circuit will be described below. When driving an electric vehicle, the power battery unit 40 provides power required by the drive control unit 50 to enable the drive control unit 50 to control the operation of the motor 10. In the present embodiment, the synchronous switch controller 80 Controlling the first electrical contact 71 of the relay 70 in an ON state and controlling the second electrical contact 72 to be in an OFF state. Further, since the second electrical contact 72 is in an OFF state, the energy is The collecting unit 20 is still unable to collect power; when the signal detecting unit 60 detects the braking signal or the deceleration signal, it transmits the measured signal to the driving control unit 50 and the synchronous switch control. At this time, the synchronous switch controller 80 switches the first electrical contact 71 of the relay 70 to an OFF state and the second electrical contact 72 to an ON state to enable the energy. The collecting unit 20 can start collecting the electric energy generated by the motor 10, and the electric energy collected by the energy collecting unit 20 is boosted by the boosting circuit 30 and recovered to the power battery unit 40 for power recovery purposes. In this embodiment, the liter DC output voltage based circuit 30 is larger than the rated power supply 40 of the cell voltage, Preferably, the booster circuit 30 of the DC output voltage line up 80V.
The electric vehicle energy recovery circuit of the present invention can exert an electric energy recovery function when the motor 10 brakes or decelerates, and the utility model can greatly improve the endurance power of the power battery unit 40 and improve the cruising range of the electric vehicle.
The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

10‧‧‧ motor
20‧‧‧Energy collection unit
30‧‧‧Boost circuit
30a‧‧‧First connection
30b‧‧‧second connection
31‧‧‧Anti-backflow components
40‧‧‧Power battery unit 40a‧‧‧ positive terminal
40b‧‧‧Negative end
50‧‧‧Drive Control Unit
60‧‧‧Signal Detection Unit
70‧‧‧ Relay
71‧‧‧First electric pick-up point
72‧‧‧Second electric contact
80‧‧‧Synchronous switch controller
90‧‧‧Reverse flow protection components
C‧‧‧ capacitor

Figure 1 is a circuit diagram of an electric vehicle energy recovery circuit in accordance with a preferred embodiment of the present invention.

10‧‧‧ motor

20‧‧‧Energy collection unit

30‧‧‧Boost circuit

30a‧‧‧First connection

30b‧‧‧second connection

31‧‧‧Anti-backflow components

40‧‧‧Power battery unit

40a‧‧‧ positive end

40b‧‧‧Negative end

50‧‧‧Drive Control Unit

60‧‧‧Signal Detection Unit

70‧‧‧ Relay

71‧‧‧First electric pick-up point

72‧‧‧Second electric contact

80‧‧‧Synchronous switch controller

90‧‧‧Reverse flow protection components

C‧‧‧ capacitor

Claims (7)

An electric vehicle energy recovery circuit comprising: a motor; an energy collecting unit electrically connected to the motor; a boosting circuit electrically connected to the energy collecting unit, having a first connecting end and a first The second connecting end; a power battery unit having a positive end and a negative end, wherein the positive end and the negative end are respectively connected to the first connecting end and the second connecting end of the boosting circuit; a driving control a unit electrically connected to the positive end of the power battery unit; a signal detecting unit electrically connected to the driving control unit and capable of detecting a brake power down signal; and a relay electrically connected to the a driving control unit having a first electrical contact and a second electrical contact, the first electrical contact and the second electrical contact being connected to the motor; and a synchronous switch controller Electrically connecting the signal detecting unit, and controlling the action of the first electrical contact and the second electrical contact, when the signal detecting unit detects the brake power off signal, the measured signal is detected Signal is transmitted to the drive control unit The synchronous switch controller switches the first electric contact to an OFF state and the second electric contact to an ON state, so that the energy collecting unit starts collecting the electric energy generated by the motor . The electric vehicle energy recovery circuit according to claim 1, wherein the motor is a direct drive motor. The electric vehicle energy recovery circuit of claim 1, wherein the energy harvester is composed of a plurality of capacitors. The electric vehicle energy recovery circuit according to claim 3, wherein the capacitors are super (gold) capacitors. The electric vehicle energy recovery circuit of claim 1, wherein the signal detecting unit is further capable of detecting a deceleration signal. The electric vehicle energy recovery circuit according to claim 1, wherein the boosting circuit has an anti-backflow element, and the anti-backflow element is disposed at the first connecting end. The electric vehicle energy recovery circuit of claim 1, further comprising a backflow protection component disposed between the second electrical contact and the energy harvesting unit.