CN207021727U - Energy-saving circuit capable of automatically powering off after charger is full and charger - Google Patents

Abstract

The utility model relates to an energy-saving circuit and a charger which cut off power automatically after the charger is fully charged. The energy-saving circuit comprises: a boost circuit connected with a full-filled indicator light in the charger, and the output end of the boost circuit is connected to a photoelectric Coupling the bidirectional thyristor driver, and controlling the charging main circuit in the charger to disconnect through the photoelectric coupling bidirectional thyristor driver; the utility model only needs to be connected to the device circuit like a switch, and the charger can be cut off after it is fully charged. power supply for energy-saving control. The energy-saving circuit only consumes power during operation, and hardly consumes power during the charging process.

Description

Energy-saving circuit and charger that cut off power automatically after the charger is fully charged

technical field

The utility model relates to an energy-saving circuit and a charger which cut off the power automatically after the charger is fully charged.

Background technique

At present, electric vehicles are very popular in China, and the problem of charging electric vehicles is more prominent, that is, when the charging is completed, the charger is still in the charging state, that is, the electric vehicle is fully charged and the power supply is not completely cut off, which is limited for individuals. , for the operation of shared electric vehicles, the cumulative power consumption is huge.

Therefore, based on this purpose, it is necessary to design an energy-saving circuit and a charger that are suitable for power-off automatically after the electric vehicle charger is fully charged.

Utility model content

The purpose of the utility model is to provide an energy-saving circuit and a charger, so as to automatically cut off the power after the electric vehicle charger is fully charged.

In order to solve the above-mentioned technical problems, the utility model provides an energy-saving circuit, comprising: a boost circuit connected to the indicator light in the charger, the output end of the boost circuit is connected to a photoelectrically coupled triac driver, and The charging main circuit in the charger is controlled to be disconnected through the photoelectric coupling bidirectional thyristor driver.

Further, the boost circuit includes: a resistor R1, the first end of the resistor R1 is connected to one end of the full-filled indicator light, and the second end of the resistor R1 is connected to the negative pole of the electrolytic capacitor C1, and the positive pole of the electrolytic capacitor C1 is connected to the full-filled indicator The other end of the lamp; and the positive pole and the negative pole of the electrolytic capacitor C1 are respectively connected to the anode and cathode of the light receiver in the photocoupler triac driver.

Further, the output end of the photoelectrically coupled triac driver is connected to a triac control circuit; the triac control circuit includes: a triac controlled by the photoelectrically coupled triac driver, the The bidirectional thyristor is suitable for connecting to the charging main circuit; when the full charge indicator light is on, the stored voltage of the electrolytic capacitor C1 triggers the photoelectrically coupled bidirectional thyristor driver, and then controls the charging main circuit to disconnect.

Further, if the full indicator light is suitable for using three-pin double-color LEDs, and includes a red LED to indicate the charging state and a green LED to indicate the full state, the yellow color of the two LEDs is mixed to indicate the floating charge state; and the indicator light of the three-pin double-color LED is controlled by the indicator control circuit State switching, that is, the indicator light control circuit includes: an NPN transistor, one end of the red LED is connected to the base of the NPN transistor through a current-limiting resistor R0, and the collector and emitter of the NPN transistor are respectively connected to both ends of the green LED; When the charger is in the state of charging or floating charging, the red LED lights up, and the NPN transistor is in a saturated state, that is, the boost circuit does not work; when the charger is in a full state, the green LED lights up, and the NPN transistor is in the cut-off state. state, that is, the boost circuit controls the triggering of the optocoupler triac driver.

In another aspect, the utility model also provides a charger.

The charger is equipped with the above-mentioned energy-saving circuit.

The beneficial effect of the utility model is that the utility model only needs to be connected to the device circuit like a switch, and the charger can be cut off after being fully charged, thereby realizing energy-saving control. The energy-saving circuit only consumes power during operation, and hardly consumes power during the charging process.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the circuit schematic diagram of the energy-saving circuit of the present utility model;

FIG. 2 is a circuit schematic diagram corresponding to another embodiment of the energy-saving circuit of the present invention.

In the figure, a photoelectrically coupled bidirectional thyristor driver U1, a bidirectional thyristor VT, and an NPN transistor T.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail. These drawings are all simplified schematic diagrams, and only schematically illustrate the basic structure of the utility model, so they only show the configurations related to the utility model.

Example 1

As shown in Figure 1, Embodiment 1 provides an energy-saving circuit, which is suitable for automatically powering off after the electric vehicle charger is fully charged. The output end of the boost circuit is connected to a photoelectric coupling bidirectional thyristor driver U1, and the charging main circuit in the charger is controlled to be disconnected through the photoelectric coupling bidirectional thyristor driver U1.

In Fig. 1, the terminals A and B are the connection ports for the indicator light in the charger; the optocoupler bidirectional thyristor driver U1 is, for example, MOC3020.

Specifically, the boost circuit includes: a resistor R1, the first end of the resistor R1 is connected to one end of the full charge indicator, and the second end of the resistor R1 is connected to the negative electrode of the electrolytic capacitor C1, and the positive electrode of the electrolytic capacitor C1 is connected to the full charge indicator. The other end of the indicator light; and the positive pole and the negative pole of the electrolytic capacitor C1 are respectively connected to the anode and cathode of the light receiver in the photoelectrically coupled triac driver.

The output terminal of the photoelectrically coupled triac driver is connected with a bidirectional thyristor control circuit; the described bidirectional thyristor control circuit includes: a bidirectional thyristor VT controlled by the photoelectrically coupled triac driver, the bidirectional thyristor VT The thyristor is suitable for connecting to the charging main circuit; when the full charge indicator light is on, the stored voltage of the electrolytic capacitor C1 triggers the photoelectrically coupled bidirectional thyristor driver, and then controls the charging main circuit to disconnect.

The full indicator light is, for example, a green LED. After the charger is fully charged, the green LED is generally lit. It is designed according to the input voltage 1.15V (maximum 1.5V) and 15mA requirements of the optocoupler triac driver MOC3020. If the green LED The LED adopts 2.2V LED, and the resistor R1 is selected as 46 ohms, and the voltage at both ends of the electrolytic capacitor C1 gradually rises, and when the optocoupler input voltage of the optocoupler triac driver MOC3020 is above 1.15V, the triac VT is triggered ( For example, but not limited to, Hi-com bidirectional thyristor) is turned on, the relay KA coil is energized, that is, the normally closed contact of the control relay (that is, the electric control power-off switch) is disconnected, that is, the power supply of the charger is cut off, including this The power supply of the circuit; this circuit is only energized at the moment of power failure, and it consumes almost no power at ordinary times.

Furthermore, the resistor R1 and the electrolytic capacitor C1 are designed to prevent the green LED from getting a pulse voltage at the start of charging, and to prevent malfunctions at the start of charging.

As shown in Figure 2, if the full indicator light is suitable for using three-pin two-color LEDs, and includes a red LED to indicate the charging state and a green LED to indicate the full state, the yellow color of the two LEDs is mixed to indicate the floating charge state; and the three-pin two-color LED is controlled by the indicator light control circuit The indicator light status of the LED is switched, that is, the indicator light control circuit includes: an NPN triode, one end of the red LED is connected to the base of the NPN triode through a current limiting resistor R0, and the collector and emitter of the NPN triode are respectively connected to the green LED. When the charger is in the state of charging or floating charging, the red LED lights up, and the NPN transistor is in a saturated state, that is, the boost circuit does not work; when the charger is in a full state, the green LED lights up, The NPN triode is in the cut-off state, that is, the boost circuit controls the triggering of the photoelectric coupling triac driver. Therefore, this energy-saving circuit can also be extended to a variety of chargers.

The charging operation process of the energy-saving circuit:

Step S1, connect the charger to the power supply;

Step S2, pressing the electric control power-off switch, the circuit is connected, and the charging starts.

After that, human intervention is no longer required.

Example 2

On the basis of Embodiment 1, Embodiment 2 provides a charger.

The charger is equipped with the energy-saving circuit as described in Embodiment 1.

Inspired by the above-mentioned ideal embodiment according to the utility model, and through the above-mentioned description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (5)

1. An energy-saving circuit, characterized in that, comprising: A voltage boosting circuit connected to the indicator light in the charger, the output end of the voltage boosting circuit is connected to a photoelectric coupling bidirectional thyristor driver, and the charging main circuit in the charger is controlled by the photoelectric coupling bidirectional thyristor driver disconnect. 2. The energy-saving circuit according to claim 1, characterized in that, The boost circuit includes: a resistor R1, the first end of the resistor R1 is connected to one end of the full-fill indicator light, the second end of the resistor R1 is connected to the negative pole of the electrolytic capacitor C1, and the positive pole of the electrolytic capacitor C1 is connected to the full-fill indicator light. the other end; and The anode and cathode of the electrolytic capacitor C1 are respectively connected to the anode and cathode of the light receiver in the photoelectrically coupled triac driver. 3. The energy-saving circuit according to claim 2, characterized in that, The output end of the photoelectrically coupled bidirectional thyristor driver is connected to a bidirectional thyristor control circuit; The bidirectional thyristor control circuit includes: a bidirectional thyristor controlled by a photoelectrically coupled bidirectional thyristor driver, and the bidirectional thyristor is suitable for being connected to a charging main circuit; When the fully charged indicator light is on, the stored voltage of the electrolytic capacitor C1 triggers the photoelectric coupling bidirectional thyristor driver, and then controls the charging main circuit to disconnect. 4. The energy-saving circuit according to claim 3, characterized in that, If the full indicator light is suitable for using three-pin dual-color LEDs, and includes a red LED to indicate the charging state and a green LED to indicate the full state, and the yellow color of the two LEDs to indicate the float state; and Control the status switching of the indicator light of the three-pin double-color LED through the indicator light control circuit, that is The indicator light control circuit includes: an NPN transistor, one end of the red LED is connected to the base of the NPN transistor through a current limiting resistor R0, and the collector and emitter of the NPN transistor are respectively connected to both ends of the green LED; When the charger is in the state of charging or floating charging, the red LED is on, and the NPN transistor is in a saturated state, that is, the boost circuit does not work; When the charger is fully charged, the green LED is on, and the NPN transistor is in the cut-off state, that is, the boost circuit controls the photocoupling bidirectional thyristor driver to trigger. 5. A charger, characterized in that, The charger is equipped with the energy-saving circuit according to any one of claims 1-4.