CN205070564U - Electric vehicle charging circuit - Google Patents

Abstract

The utility model discloses a charging circuit for an electric vehicle, which comprises a diode D1, a resistor R1, an inductance L1, a capacitor C1, a transformer T, an optocoupler U1 and a chip U2. The negative pole is respectively connected to the negative pole of diode D2, capacitor C1 and inductor L1, the positive pole of diode D2 is respectively connected to the other end of 220V AC and the negative pole of diode D4, the positive pole of diode D4 is respectively connected to the positive pole of diode D3, the other end of capacitor C1 and inductor L2, and the other end of inductor L2 is respectively connected to The pin S of the chip U2, the capacitor C2 and the capacitor C4, and the other end of the capacitor C4 are respectively connected to the collector of the phototransistor in the optocoupler U1 and the pin BP of the chip U2. The electric vehicle charging circuit of the utility model is mainly controlled by TNY363, and the cost is low, and the price is comparable to that of a linear charger, but it is more efficient than a traditional linear charger, smaller in size, does not need to be connected to an external heat sink, and is lighter in weight.

Description

An electric vehicle charging circuit

technical field

The utility model relates to a charging circuit, in particular to an electric vehicle charging circuit.

Background technique

With the popularization of electric vehicles, electric vehicle charging technology has also attracted people's attention. Most of the power batteries for electric vehicles in my country are lead-acid batteries. This is mainly because lead-acid batteries have the advantages of mature technology, low cost, large battery capacity, good output characteristics following the load, and no memory effect. However, traditional chargers have the advantages of charging Disadvantages such as large loss, low charging efficiency, large volume, and high cost seriously restrict the development of electric vehicles.

Utility model content

The purpose of this utility model is to provide a charging circuit for an electric vehicle to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A charging circuit for an electric vehicle, comprising a diode D1, a resistor R1, an inductor L1, a capacitor C1, a transformer T, an optocoupler U1 and a chip U2, the anode of the diode D1 is respectively connected to one end of a 220V alternating current and the cathode of a diode D3, and the cathode of the diode D1 is respectively connected to The negative pole of diode D2, capacitor C1 and inductor L1, the positive pole of diode D2 are respectively connected to the other end of 220V AC and the negative pole of diode D4, the positive pole of diode D4 is respectively connected to the positive pole of diode D3, the other end of capacitor C1 and inductor L2, the other end of inductor L2 is respectively connected to the lead of chip U2 Pin S, capacitor C2 and capacitor C4, the other end of capacitor C4 is respectively connected to the collector of the phototransistor in optocoupler U1 and pin BP of chip U2, pin FB of chip U2 is connected to the emitter of the phototransistor in optocoupler U1, and pin D of chip U2 Connect the anode of the diode D6 and one end of the primary coil of the transformer T respectively, the cathode of the diode D6 is connected to the resistor R2, the other end of the resistor R2 is connected to the resistor R1 and the capacitor C3, and the other end of the capacitor C3 is respectively connected to the other end of the inductor L1, the other end of the capacitor C2, and the other end of the resistor R1 One end is connected to the other end of the primary coil of the transformer T, and one end of the secondary coil of the transformer T is respectively connected to the positive pole of the capacitor C5 and the diode D5, the other end of the capacitor C5 is connected to the resistor R3, and the other end of the resistor R3 is respectively connected to the capacitor C6, the negative pole of the diode D5, and the light inside the optocoupler U1 The positive pole of the diode and resistor R9, the other end of resistor R9 are respectively connected to resistor R5, resistor R6 and the positive pole of battery pack E, the negative pole of battery pack E is respectively connected to resistor R8, the A pole of controllable precision voltage regulator VS, the other end of capacitor C6 and transformer T At the other end of the secondary coil, the K pole of the controllable precision voltage stabilizer VS is connected to the other end of the resistor R5, the cathode of the light-emitting diode in the optocoupler U1, and the resistor R7. The other end of the resistor R7 is connected to the capacitor C7, and the other end of the capacitor C7 is connected to the resistor R6. The other end, the other end of the resistor R8 and the R pole of the controllable precision voltage regulator VS, the chip U2 adopts TNY363D.

As a further solution of the utility model: the controllable precision voltage regulator VS adopts TL431.

As a further solution of the utility model: the optocoupler U1 adopts PC817A.

Compared with the prior art, the beneficial effect of the utility model is that the electric vehicle charging circuit of the utility model is controlled by TNY363, the cost is low, and the price is comparable to that of a linear charger, but it is more efficient than a traditional linear charger and has a smaller volume It is small, does not need to be connected to an external heat sink, is light in weight, and is very suitable for popularization.

Description of drawings

Figure 1 is a circuit diagram of an electric vehicle charging circuit.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, in the embodiment of the utility model, an electric vehicle charging circuit includes a diode D1, a resistor R1, an inductor L1, a capacitor C1, a transformer T, an optocoupler U1 and a chip U2, and the anode of the diode D1 is respectively connected to one end of 220V AC and the cathode of diode D3, the cathode of diode D1 is respectively connected to the cathode of diode D2, capacitor C1 and inductor L1, the anode of diode D2 is respectively connected to the other end of 220V AC and the cathode of diode D4, and the anode of diode D4 is respectively connected to the anode of diode D3, the other end of capacitor C1 and inductor L2 The other end of the inductor L2 is connected to the pin S of the chip U2, the capacitor C2 and the capacitor C4, the other end of the capacitor C4 is connected to the collector of the phototransistor in the optocoupler U1 and the pin BP of the chip U2, and the pin FB of the chip U2 is connected to the optocoupler U1 The emitter of the phototransistor, the pin D of the chip U2 are respectively connected to the anode of the diode D6 and one end of the primary coil of the transformer T, the cathode of the diode D6 is connected to the resistor R2, the other end of the resistor R2 is respectively connected to the resistor R1 and the capacitor C3, and the other end of the capacitor C3 is respectively connected to the inductor L1. One end, the other end of the capacitor C2, the other end of the resistor R1 and the other end of the primary coil of the transformer T, one end of the secondary coil of the transformer T is respectively connected to the positive pole of the capacitor C5 and the diode D5, the other end of the capacitor C5 is connected to the resistor R3, and the other end of the resistor R3 is respectively connected to the capacitor C6 , the negative pole of diode D5, the positive pole of the light-emitting diode in optocoupler U1 and resistor R9, the other end of resistor R9 is respectively connected to resistor R5, resistor R6 and the positive pole of battery pack E, and the negative pole of battery pack E is connected to resistor R8 and the controllable precision voltage regulator VS respectively The A pole, the other end of the capacitor C6 and the other end of the secondary coil of the transformer T, the K pole of the controllable precision voltage regulator VS are respectively connected to the other end of the resistor R5, the negative pole of the light-emitting diode in the optocoupler U1, and the resistor R7, and the other end of the resistor R7 is connected to the capacitor C7, the other end of the capacitor C7 is respectively connected to the other end of the resistor R6, the other end of the resistor R8 and the R pole of the controllable precision voltage regulator VS, and the chip U2 is TNY363D.

The controllable precision voltage regulator VS adopts TL431.

Optocoupler U1 adopts PC817A.

The working principle of the utility model is: Please refer to Fig. 1, the transformer T primary side clamping protection circuit is composed of R1, R2, C3 and D6, which can limit the drain peak voltage of the internal MOSFE of the chip U2 below 700mv, and use R2 to Inhibit the high-frequency transformer T leakage inductance to form self-excited oscillation, thereby reducing electromagnetic interference. In constant voltage mode, the output voltage is adjusted by switch control to keep the output voltage stable. R4 and R9 are constant current detection resistors. In constant current mode The constant current output can be realized by detecting the voltage on R4 and R9. When the voltage on R4 and R9 exceeds the voltage drop of the light-emitting diode in PC817A, it will turn from constant voltage mode to constant current mode. In constant current mode, the control switch Frequency to achieve constant current characteristics, when the battery pack E transient changes, R5 can limit the current through the optocoupler PC817A, R5 doubles as the current limiting resistor of TL431.

The utility model is mainly controlled by TNY363, which is low in cost and comparable in price to linear chargers, but it has higher efficiency than traditional linear chargers, smaller volume, no need for external cooling fins, and light weight.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (3)

1. a charging circuit for electric vehicles, comprise diode D1, resistance R1, inductance L 1, electric capacity C1, transformer T, optocoupler U1 and chip U2, it is characterized in that, described diode D1 positive pole connects 220V alternating current one end and diode D3 negative pole respectively, diode D1 negative pole connects diode D2 negative pole respectively, electric capacity C1 and inductance L 1, diode D2 positive pole connects the 220V alternating current other end and diode D4 negative pole respectively, diode D4 positive pole connects diode D3 positive pole respectively, the electric capacity C1 other end and inductance L 2, inductance L 2 other end connects chip U2 pin S respectively, electric capacity C2 and electric capacity C4, the electric capacity C4 other end connects phototriode collector electrode and chip U2 pin BP in optocoupler U1 respectively, chip U2 pin FB connects phototriode emitter in optocoupler U1, chip U2 pin D connects diode D6 positive pole and transformer T primary coil one end respectively, diode D6 negative pole contact resistance R2, the resistance R2 other end is contact resistance R1 and electric capacity C3 respectively, the electric capacity C3 other end connects inductance L 1 other end respectively, the electric capacity C2 other end, the resistance R1 other end and the transformer T primary coil other end, transformer T secondary coil one end connects electric capacity C5 and diode D5 positive pole respectively, electric capacity C5 other end contact resistance R3, the resistance R3 other end connects electric capacity C6 respectively, diode D5 negative pole, light-emitting diode positive pole and resistance R9 in optocoupler U1, the resistance R9 other end is contact resistance R5 respectively, resistance R6 and batteries E positive pole, batteries E negative pole is contact resistance R8 respectively, the A pole of controllable accurate source of stable pressure VS, the electric capacity C6 other end and the transformer T secondary coil other end, the K pole contact resistance R5 other end respectively of controllable accurate source of stable pressure VS, light-emitting diode negative pole and resistance R7 in optocoupler U1, the resistance R7 other end connects electric capacity C7, the electric capacity C7 other end is the contact resistance R6 other end respectively, the R pole of the resistance R8 other end and controllable accurate source of stable pressure VS, described chip U2 adopts TNY363D.

2. charging circuit for electric vehicles according to claim 1, is characterized in that, described controllable accurate source of stable pressure VS adopts TL431.

3. charging circuit for electric vehicles according to claim 1, is characterized in that, described optocoupler U1 adopts PC817A.