High-speed battery charger control circuit

Abstract

The utility model belongs to the technical field of battery chargers, and particularly relates to a high-speed battery charger control circuit which comprises a charger control circuit and a battery, and the battery is connected with an external input power supply through the charger control circuit. The charger control circuit comprises an integrated circuit chip, a second divider resistor, a third divider resistor, a first triode and a second triode, and the input end of the integrated circuit chip connects a fifth divider resistor and a sixth divider resistor to the positive electrode and the negative electrode of the battery respectively. Two ends of the integrated circuit chip are connected in series with a first triode, a first rectifier diode, a double-color indicating lamp and a second triode. And a second divider resistor, a third divider resistor, a fourth divider resistor and a third rectifier diode are connected between the first triode and the second triode. The charger control circuit provided by the utility model can realize rapid charging, and has the characteristics of short circuit of two ends of the battery, no work of the battery in reverse connection, perfect circuit protection, capability of ensuring that the charger and the battery are protected during charging, simple circuit and convenience in maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery chargers, and particularly relates to a control circuit for a high-speed battery charger. Background Art

[0002] With the progress of science and technology, rechargeable batteries with large capacity are widely used in various fields. The charger technology for large-capacity rechargeable batteries is constantly updated and improved, and the technology of super-large-capacity capacitors is gradually mature.

[0003] When the existing rechargeable batteries are charged at high current and high speed, the terminal voltage and end control of the charging cannot achieve consistency and reliability due to the influence of battery polarization; the charger control circuit does not have the functions of short circuit at both ends of the battery and non-operation when the battery is reversely connected, and the circuit structure is complex and the cost is high. Summary of the Invention

[0004] To solve the problems raised in the above background art, the utility model provides a control circuit for a high-speed battery charger. The charger control circuit can charge quickly, has the functions of short circuit at both ends of the battery and non-operation when the battery is reversely connected, has perfect circuit protection, ensures that both the charger and the battery are protected during charging, has a simple circuit, is convenient to maintain, and works reliably.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A control circuit for a high-speed battery charger includes a charger control circuit and a battery. The battery is connected to an external input power supply through the charger control circuit;

[0006] The charger control circuit includes an integrated circuit chip, a second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor, a fifth voltage-dividing resistor, a sixth voltage-dividing resistor, a first triode and a second triode. The input end of the integrated circuit chip is respectively connected to the fifth voltage-dividing resistor and the sixth voltage-dividing resistor to the positive and negative electrodes of the battery. A third filter capacitor is connected across the integrated circuit chip. A first triode, a first rectifier diode, a dual-color indicator lamp and a second triode are connected in series across the integrated circuit chip; A second voltage-dividing resistor, a third voltage-dividing resistor, a fourth voltage-dividing resistor and a third rectifier diode are connected between the first triode and the second triode; The dual-color indicator lamp is connected with a first current-limiting resistor.

[0007] As a preferred solution, the external input power supply includes a DC input power supply and an AC input power supply.

[0008] As a preferred solution, when the charger control circuit is connected to the AC input power supply, the charger control circuit further includes a second rectifier diode, a first filter capacitor and a second filter capacitor. The second rectifier diode and the first filter capacitor are respectively connected to the dual-color indicator lamp through a first current-limiting resistor, and the second filter capacitor is connected between the emitters of the first triode and the second triode.

[0009] As a preferred solution, the base of the second triode is connected to the third rectifying diode and the second voltage-dividing resistor and then to the emitter of the first triode. The base of the first triode is connected to the collector of the second triode. The emitter of the second triode is connected to one end of the integrated circuit chip. The collector of the first triode is connected to the other end of the integrated circuit chip through the third voltage-dividing resistor.

[0010] As a preferred solution, the first triode is a P-channel MOS transistor.

[0011] As a preferred solution, the two-color indicator light includes a red indicator light and a green indicator light.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The charger control circuit of the present utility model can charge quickly and has the characteristics that when the two ends of the battery are short-circuited or the battery is reversely connected, it does not work. When the battery is short-circuited, the second voltage-dividing resistor and the third voltage-dividing resistor form a voltage division. The voltage division is too low, the third rectifying diode does not conduct, the first triode and the second triode are cut off, and the circuit does not work.

[0014] In the charger control circuit of the present utility model, the first triode Q1 is a P-channel MOS transistor, which can obtain a very low voltage drop and a large working current, thereby improving the charging speed.

[0015] The present utility model has the characteristics of perfect circuit protection, ensuring the protection of both the charger and the battery during charging, simple circuit, convenient maintenance, reliable operation, ingenuity, and low cost, and has obvious progressiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the DC input power supply of the present utility model;

[0017] Figure 2 It is a schematic structural diagram of an embodiment of the AC input power supply of the present utility model; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0019] Please refer to Figure 1, the present utility model provides the following technical solutions: A control circuit for a high-speed battery charger, including a charger control circuit and a battery. The battery is connected to an external input power supply through the charger control circuit;

[0020] The charger control circuit includes an integrated circuit chip IC1, a second voltage-dividing resistor R2, a third voltage-dividing resistor R3, a fourth voltage-dividing resistor R4, a fifth voltage-dividing resistor R5, a sixth voltage-dividing resistor R6, a first triode Q1, and a second triode Q2. The input end of the integrated circuit chip IC1 is respectively connected to the fifth voltage-dividing resistor R5 and the sixth voltage-dividing resistor R6 to the positive and negative electrodes of the battery. A third filter capacitor C3 is connected across the integrated circuit chip IC1. The integrated circuit chip IC1 is connected in series with a first triode Q1, a first rectifying diode D1, a two-color indicator LED, and a second triode Q2; A second voltage-dividing resistor R2, a third voltage-dividing resistor R3, a fourth voltage-dividing resistor R4, and a third rectifying diode D3 are connected between the first triode Q1 and the second triode Q2; The two-color indicator LED is connected with a first current-limiting resistor R1.

[0021] In this embodiment, the external input power supply includes a DC input power supply DC.

[0022] In this embodiment, the base of the second triode Q2 is connected to the third rectifying diode D3 and the second voltage-dividing resistor R2 to the emitter of the first triode Q1. The base of the first triode Q1 is connected to the collector of the second triode Q2. The emitter of the second triode Q2 is connected to one end of the integrated circuit chip IC1. The collector of the first triode Q1 is connected to the other end of the integrated circuit chip IC1 through the third voltage-dividing resistor R3.

[0023] In this embodiment, the first triode Q1 uses a P-channel MOS transistor, which can achieve a very low voltage drop and a large working current, improving the charging speed.

[0024] In this embodiment, the two-color indicator LED includes a red indicator and a green indicator.

[0025] The working principle and usage process of the present utility model: When the present utility model is in use, the first rectifying diode D1 provides rectification for the main charging circuit; The fifth voltage-dividing resistor R5 and the sixth voltage-dividing resistor R6 are used for voltage division and enter the integrated circuit chip IC1, which is compared with the reference voltage inside the integrated circuit chip IC1 to determine whether the voltage across the battery is too high or too low. If it is too low, the output pin of the integrated circuit chip IC1 will increase the voltage, thereby also increasing the current entering the third rectifying diode D3. The first triode Q1 and the second triode Q2 will increase their conduction until they are fully conducting. The negative terminal voltage of the red indicator of the two-color indicator LED is pulled down by the second triode Q2, and the red indicator lights up indicating that it is charging until the battery is fully charged.

[0026] If the voltage across the battery reaches the set voltage, the output pin of the integrated circuit chip IC1 will reduce the voltage, which will also reduce the current flowing into the third rectifying diode D3. The conduction of the first triode Q1 and the second triode Q2 will also be reduced until the first triode Q1 and the second triode Q2 are turned off, the charging stops, the red indicator light goes out, and only the green indicator light is on.

[0027] In addition to fast charging, this circuit also has the characteristics that the two ends of the battery are short-circuited and the battery is reversely connected and does not work. When the battery is short-circuited, the second voltage-dividing resistor R2 and the third voltage-dividing resistor R3 form a voltage division. The voltage division is too low, and the third rectifying diode D3 is not turned on. The first triode Q1 and the second triode Q2 are cut off, and the circuit does not work. The first triode Q1 of this circuit is preferably a P-channel MOS transistor, which can obtain a very low voltage drop and a large working current, thereby improving the charging speed. The present invention has the characteristics of perfect circuit protection, reliable operation, simple and ingenious circuit, and low cost, and has obvious progressiveness. Embodiment

[0028] Please refer to Figure 2 , the present utility model provides a control circuit for a high-speed battery charger, which has different technical features from Embodiment 1:

[0029] The external input power supply includes an AC input power supply AC. The charger control circuit is connected to the AC input power supply AC. The charger control circuit further includes a second rectifying diode D2, a first filter capacitor C1, and a second filter capacitor C2. The second rectifying diode D2 and the first filter capacitor C1 are respectively connected to the dual-color indicator LED through a first current-limiting resistor R1. The second filter capacitor C2 is connected to the emitters of the first triode Q1 and the second triode Q2.

[0030] When the present utility model is in use, since the external input power supply is the AC input power supply AC, the second rectifying diode D2 provides power rectification for the dual-color indicator LED, and the first filter capacitor C1 and the second filter capacitor C2 are used to realize the charging and filtering functions of the charger control circuit, ensuring the stability and reliability of the input power supply.

[0031] In addition to fast charging, this circuit also has the characteristics that the two ends of the battery are short-circuited and the battery is reversely connected and does not work, improving the charging speed; reliable operation, simple and ingenious circuit, and low cost, and has obvious progressiveness.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A control circuit for a high-speed battery charger, characterized in that: It includes a charger control circuit and a battery. The battery is connected to an external input power supply through the charger control circuit; The charger control circuit includes an integrated circuit chip (IC1), a second voltage-dividing resistor (R2), a third voltage-dividing resistor (R3), a fourth voltage-dividing resistor (R4), a fifth voltage-dividing resistor (R5), a sixth voltage-dividing resistor (R6), a first triode (Q1) and a second triode (Q2). The input terminal of the integrated circuit chip (IC1) is respectively connected to the fifth voltage-dividing resistor (R5) and the sixth voltage-dividing resistor (R6) to the positive and negative electrodes of the battery. A third filter capacitor (C3) is connected across the integrated circuit chip (IC1). A first triode (Q1), a first rectifying diode (D1), a dual-color indicator lamp (LED) and a second triode (Q2) are connected in series across the integrated circuit chip (IC1). A second voltage-dividing resistor (R2), a third voltage-dividing resistor (R3), a fourth voltage-dividing resistor (R4) and a third rectifying diode (D3) are connected between the first triode (Q1) and the second triode (Q2). A first current-limiting resistor (R1) is connected to the dual-color indicator lamp (LED).

2. The battery high-speed charger control circuit according to claim 1, characterized in that: The external input power supply includes a DC input power supply (DC) and an AC input power supply (AC).

3. The battery high-speed charger control circuit according to claim 1, wherein: The charger control circuit is connected to the AC input power supply (AC). The charger control circuit further includes a second rectifying diode (D2), a first filter capacitor (C1) and a second filter capacitor (C2). The second rectifying diode (D2) and the first filter capacitor (C1) are respectively connected to the dual-color indicator lamp (LED) through the first current-limiting resistor (R1). The second filter capacitor (C2) is connected to the emitters of the first triode (Q1) and the second triode (Q2).

4. The battery high-speed charger control circuit according to claim 1, characterized in that: The base of the second triode (Q2) is connected to the third rectifying diode (D3) and the second voltage-dividing resistor (R2) to the emitter of the first triode (Q1). The base of the first triode (Q1) is connected to the collector of the second triode (Q2). The emitter of the second triode (Q2) is connected to one end of the integrated circuit chip (IC1). The collector of the first triode (Q1) is connected to the other end of the integrated circuit chip (IC1) through the third voltage-dividing resistor (R3).

5. The battery high-speed charger control circuit according to claim 1, wherein: The first triode (Q1) is a P-channel MOS transistor.

6. The battery high-speed charger control circuit according to claim 1, characterized in that: The dual-color indicator lamp (LED) includes a red indicator lamp and a green indicator lamp.

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