WO2000046897A1

WO2000046897A1 - Charging device

Info

Publication number: WO2000046897A1
Application number: PCT/CN1999/000109
Authority: WO
Inventors: Ju Du; Yuzeng Li
Original assignee: Ju Du; Yuzeng Li
Priority date: 1999-02-01
Filing date: 1999-08-06
Publication date: 2000-08-10
Also published as: CN2341314Y; AU5147099A

Abstract

The present invention relates to a fast charging device using an alternating current or direct current. It includes a rectifier, an AC breaker, a high-frequency inverter, a high-frequency vertoro, a charging detector, a temperature detector and a fuzziness controller and except the rectifier, they are connected in these order in manner of closed loop. The charging detector and the temperature detector are connected with the high-frequency inverter through a PID modulator. The charging detector and the temperature detector are also connected with a DC breaker. The DC breaker, a direct voltage adjuster and the charging detector are connected in this order. The present invention has the advantage of fast charging, difficultly generating heat, safe using and so on.

Description

Charging device

The invention relates to a charging device, in particular to a fast AC / DC dual-purpose charging device.

The biggest disadvantage of the charging devices in the prior art is that the charging time is too long.

5 to 12 hours, which greatly affects the charging efficiency. Second, it cannot be charged at low temperatures (such as below 0 ° C). Third, if the battery is charged with a high-power charger to shorten the charging time, it will result in The battery is hot. Fourth, passivation cannot be eliminated for a passivated battery.

The purpose of the present invention is to overcome the above disadvantages in the prior art and design a fast charging device.

The present invention provides a charging device, which is characterized in that it includes a rectifier, an AC circuit breaker, a high-frequency inverter, a high-frequency transformer rectifier, a charging detector, a temperature detector, a fuzzy controller, and a PID regulator; wherein:

The rectifier is used to rectify AC power;

The AC circuit breaker receives the rectified electrical signal from the rectifier and provides it to the high-frequency inverter, and cuts off when the battery charging signal detected by the charging detector reaches a predetermined value. An electric signal provided to the high-frequency inverter, and the battery charging signal includes a voltage signal or a temperature signal;

The high-frequency inverter is configured to convert an electric signal output from the AC circuit breaker into a high-frequency pulse electric signal;

The high-frequency variable-voltage rectifier transforms and rectifies the high-frequency pulse current of the high-frequency inverter to provide a charging current for a rechargeable battery;

The charging detector is configured to generate a battery charging signal according to a battery voltage or an output signal of the temperature detector, when the battery voltage reaches a set value, or when the output of the temperature detector representing the temperature rise of the battery reaches the desired value. When the value is set, an action signal is output to the fuzzy controller, and then the AC circuit breaker is controlled to cut off the current supply and stop the circuit.

The charging device of the present invention may further include a DC circuit breaker and a DC voltage regulator, so that It can work on a DC power supply. The DC circuit breaker is used to receive a DC signal from the outside and charge the load through the DC voltage regulator and the charging detector. When the battery charging signal detected by the charging detector reaches When the predetermined value or the temperature detector detects that the temperature of the battery reaches a predetermined value, the electric signal provided to the DC voltage regulator is cut off, and the charging of the battery is stopped.

The invention has the following positive effects:

1- Effectively achieve fast charging of various rechargeable batteries. The charging time for batteries with corresponding capacity is generally within one hour, and the charging process can be completed within 15 minutes at the fastest;

2. Solved the defect that lead-acid batteries are not easy to charge in the following low temperature states;

3. It overcomes the technical problem that the battery is easy to generate heat when charging at high current;

4. The passivated battery can be activated to make it a normal working battery and prolong the battery life;

5- Through the use of fuzzy controllers and circuit breakers, when the charger encounters abnormal conditions such as short circuit, open circuit, overheating, and overvoltage during the work process, it will automatically shut down without turning on the power;

6- Using optical isolation and transformer isolation technology, the impedance between the high-voltage and low-voltage lines of the charger is greater than 50MΩ, ensuring the safety of the user.

The invention is further described below with reference to the drawings:

Figure 1 is a schematic diagram of the appearance and structure of the present invention

Figure 2 is a block diagram of the circuit of the present invention

Figure 3 is a circuit diagram of the present invention

In Fig. 1, reference numeral 1 represents a box body; reference numeral 2 represents an AC input socket; reference numeral 3 represents a DC input socket; and reference numeral 4 represents a DC output socket. Among them, the AC input socket 2 is connected to the mains 220V (or 110V) through a lead wire, the DC input socket 3 is connected to an external DC power source through a lead, and the DC output socket 4 is connected to a battery to be charged through a lead.

In FIG. 2, the rectifier 5, the AC circuit breaker 6, the high-frequency inverter 7, the high-frequency transformer rectifier 8, the charging detector 9, the temperature detector 10, the fuzzy controller 11, and the AC circuit breaker 6 are sequentially connected in order to charge. The detector 9 and the temperature detector 10 are connected to the high-frequency inverter 7 through a PID regulator 12, and the charge detector 9 and the temperature detector 10 are also connected to a DC circuit breaker 13. Circuit breaker 13, DC voltage regulator 14, and charging detector 9 are connected in sequence, rectifier 5 is connected to AC input socket 2 on box 1, DC circuit breaker 13 is connected to DC input socket 3 on box 1, charging detection The detector 9, the temperature detector 10 and the fuzzy controller 11 are respectively connected to the DC output socket 4 on the box body 1.

The circuit diagram shown in FIG. 3 includes all circuit units in FIG. 2, where:

The rectifier 5 is composed of a diode VI, V2, V3, V4, a capacitor Cl, and a resistor R4.

VI, V2, V3, and V4 form a rectifier bridge circuit, C1 is connected in parallel with the output terminal of the rectifier bridge circuit, and R4 is connected in series to the "one" terminal of the output. Its working principle is: AC power is full-wave rectified by a rectifier bridge circuit, filtered by C1, and DC power is supplied to the circuit through R4.

The AC circuit breaker 6 is composed of a thyristor V5, resistors R1, R2, R5, and capacitors C2 and C3. The anode of V ₅ is connected to the 1 ^ and C2 circuits; the control electrode is connected to the R5 and C3 circuits and is connected to the fourth pin of the fuzzy controller IC3; the cathode of V5 is connected to the ground; its working principle is: When the battery charging signal (such as voltage or temperature) detected by the charging detector reaches the set value, pins 4 and 5 of the integrated circuit IC3 will output an action signal to increase the voltage of the V5 control electrode and V5 is turned on. At this time, the voltage of pins 12 and 15 of IC1 is about zero, and there is no output on pins 11 and 13 of IC1. The resistors V6 and V7, V10 and VII, V8 and V9 are turned off, and the circuit stops working.

The high-frequency inverter 7 is composed of an integrated circuit IC1, a transformer T1, a transistor V6, V7, V8, V9, V10, VII, a diode V21, and a capacitor C4, C6, C7, a resistor R6, R7, R8, R9. Pins 12 and 15 of ICl are connected to the primary and AC circuit breaker of Tl. The anode of V5 in the circuit breaker is connected; Pins 11 and 12 of IC1 are connected to the half push-pull circuit composed of V6, V7, and V10, VII, and V21 The formed half push-pull circuit is connected to the secondary pole of Tl; the output poles of the two half push-pull circuits are respectively connected to the primary phase of transformer T2 in the high-frequency transformer rectifier through V8 and V9; its working principle is: IC1 passes R6 An external circuit consisting of R7, C4, and C5 outputs pulse signals from pins 11 and 13 and processes the output pulse signals through Tl, V6, V7, V10, VII, V21, R8, and R9 to drive V8 and V9. , It is turned on in turn, and a half-bridge circuit composed of C6 and C7 completes the inversion process, and supplies an alternating high-frequency pulse current to the primary of T2 in the high-frequency transformer rectifier. In addition, the function of the PID regulator 12 is also completed by the structure of the circuit itself. The high-frequency transformer rectifier 8 is composed of a transformer T2, diodes V12, V13, V22, a capacitor C5, and a resistor R10. The primary winding L1 of T2 is connected to the output of the high-frequency inverter; the secondary winding L2 of T2 is connected to the battery through V12 and V13; the secondary group L3 of T2 is connected to the ICl of the high-frequency inverter through R10 and V22. The 12th and 15th feet are linked. The working principle is as follows: The alternating high-frequency pulse current output by L1 in T2 is coupled to L2 through a high-frequency inverter, and is rectified through V12 and V13 to provide charging current to the battery; coupled to L3, rectified through V22, and C5 Filter to provide DC working power to IC1.

The charge detector 9 is composed of a transistor V14, diodes V16, V18, and resistors Rll, R12, and R13. The positive pole of V16 is connected to the load, and the negative pole is connected to pin 1 of the fuzzy controller IC3. The base of V14 passes Rll, The negative electrode of V18 is connected to the third pin of the fuzzy controller IC3 through R13; the base of V15 is connected to R14 in the temperature detector; its working principle is: ① When the battery voltage reaches the set value voltage, V18 When it is broken, the first and second pins of IC3 are turned on, which controls a motion signal to stop the circuit. ② When the temperature of the battery reaches the set value, the resistance of R14 in the temperature detector becomes smaller. , V14 is turned on, and pins 1 and 2 of IC3 are turned on, giving an operation signal to the paste controller, and the circuit stops working.

The temperature detector 10 is composed of R14. The R14-end is connected to the load and the other end is connected to the V14 base of the charge detector. Its working principle is: R14 is a negative temperature coefficient thermistor. When the temperature rise of the battery reaches a certain value, the resistance value of R14 also decreases to a certain value, giving an action signal to the charge detector, and the V14 of the charge detector. ON to stop the circuit.

The fuzzy controller 11 is composed of an integrated circuit IC3. When the current between pins 1 and 2 of IC3 increases to a certain value, pins 4 and 5 are turned on.

The DC voltage regulator 14 is composed of integrated circuit IC2, resistors R15, R16, capacitor C8, diode V17, transistor V19, and transformer T3. The third pin of IC2 is connected to the base of V19; the eighth and first pins of IC2 are respectively It is connected to the positive and negative poles of the DC power supply; the fourth pin of IC2 is connected to the anode of the thyristor V20 in the DC circuit breaker through R18, and the collector of the eighth pin V19 of IC2 is connected; The ninth pin of IC2 is connected to the cathode of DC circuit breaker V20; its working principle is: R15, R16, and C8 form the external circuit of IC3, which is connected to DC power. After the source, IC2 oscillates and outputs a pulse signal of a certain frequency on the third pin, which controls V19 to be turned on and off periodically, and provides a pulsating DC charging current to the battery through T3.

The DC circuit breaker 13 is composed of a diode V15, a thyristor V20, a resistor Ri7, R18, R19, R20, and capacitors C9 and CIO. The anode of V20 is connected to the fourth pin of IC2 in the DC voltage regulator through R18; the control pole of V20 is connected to the negative pole of V15 through a fuzzy controller and R19; R20 is connected to the positive pole of the power supply, and the other end is connected to the negative pole of V15 Connect the positive pole of V15 to the negative pole of the power supply. Its working principle is: When the charging detector detects that the battery charging signal (such as voltage or temperature) reaches the set value, pins 4 and 5 of IC3 will output an action signal to increase the voltage of the control electrode of 20, V20 When it is turned on, the voltage of pin 4 of IC2 becomes low level, so that IC2 stops oscillating, there is no output on pin 3, V19 is turned off, and the circuit stops working.

As can be seen from FIG. 3, the types of integrated circuits are: IC1 is 3524; IC2 is 555; IC3 is 4N25.

Claims

Rights request

1. A charging device, characterized in that it comprises a rectifier, an AC circuit converter, a high-frequency inverter, a high-frequency transformer rectifier, a charging detector, a temperature detector, a fuzzy controller, and a PID regulator; wherein:

The rectifier is used to rectify AC power;

The high-frequency variable-voltage rectifier performs voltage-variable rectification on a high-frequency pulse current of the high-frequency inverter to provide a charging current for a rechargeable battery;

2. The charging device according to claim 1, characterized in that the rectifier is composed of a diode (Vl, V2, V3, V4), a capacitor (CI) and a resistor (R4).

3. The charging device according to claim 1, wherein the AC circuit breaker is composed of a thyristor (V ₅ ), a resistor (R _r R ₂ , Rg), and a capacitor (C ₂ , C ₃ ) .

4. The charging device according to claim 1, wherein the high-frequency inverter comprises an integrated circuit (IC1), a transformer (Tl), a transistor (V6, V7, V8, V9, V10, Vll), Diode (V21), and capacitor (C4, C6, C7), resistor

(R6, R7, R8, R9).

5. The charging device according to claim 1, wherein the high-frequency transformer rectifier comprises a transformer (T2), a diode (V12, V13), a transistor (V22), and a capacitor. (C5), resistor (RIO).

6. The charging device according to claim 1, wherein the charging detector is composed of a transistor (V14), a diode (V16, V18), and a resistor (Ril, R12, R13).

7. The charging device according to claim 1, wherein the temperature detector is composed of a resistor (R14).

8. The charging device according to claim 1, wherein the fuzzy controller is composed of an integrated circuit (IC3).

The charging device according to claim 1, characterized in that the DC voltage regulator comprises an integrated circuit (IC2), a resistor (R15, R16), a capacitor (C8), a diode (V17), and a transistor (V19 ), Transformer (T3).

10. A charging device, characterized in that it comprises a rectifier, an AC circuit breaker, a high-frequency inverter, a high-frequency transformer rectifier, a charging detector, a temperature detector, a fuzzy controller,

PID regulator, DC circuit breaker and DC voltage regulator; of which:

The rectifier is used to rectify AC power;

The AC circuit breaker receives the rectified electric signal from the rectifier and provides it to the high-frequency inverter. When the battery charging signal detected by the charging detector reaches a predetermined value or the When the temperature detector detects that the temperature of the battery reaches a predetermined value, it cuts off the electrical signal provided to the high-frequency inverter;

The charging detector is configured to generate a battery charging signal according to a battery voltage or an output signal of the temperature detector, when the battery voltage reaches a set value, or when the output of the temperature detector representing the temperature rise of the battery reaches the desired value. When the value is set, an action signal is output to the fuzzy controller, so as to control the AC circuit breaker, cut off the current supply, and stop the circuit.

The DC circuit breaker is used to receive a DC signal from the outside and pass the The DC voltage regulator and the charging detector charge the load. When the battery charging signal detected by the charging detector reaches a predetermined value or the temperature detector detects that the temperature of the battery reaches a predetermined value, it is cut off and supplied to the high frequency. Electrical signal from the inverter. ,

11. The charging device according to claim 10, wherein the DC circuit breaker comprises a transistor (V15), a thyristor (V20), a resistor (R17, R18, R19, R20) and a capacitor (C9 and C10) composition.