Charging indicating lamp control circuit

Abstract

The utility model relates to the technical field of charging indication, and provides a charging indicating lamp control circuit comprising a rectification filtering module, a voltage stabilization module, an oscillation module, a switch module and an indicating lamp module which are connected in sequence. For charging indication of the battery, the oscillation module and the switch module are added for combined control, the input signal frequency of the switch module can be adjusted by adjusting element parameters, and then flicker indication of the indicator lamp module is achieved through on-off control of the switch module; meanwhile, a signal pin and a control pin of the charging management module are respectively in signal control with the indicator light module and the switch module, and when the battery is normally charged, the charging management module conducts the switch module through the control pin, so that the switch module realizes flicker indication of the indicator light module; when the battery is charged, the charging management module is in short-circuit connection with the switch module through the signal pin, the indicator light module is directly conducted, continuous lighting indication after full charging is achieved, the structure is simple, cost is low, and user experience is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging indication technical field especially, relates to a charging indicating lamp control circuit. BACKGROUND

[0002] The charging indicating lamp circuit can directly show the charging state of the battery through the light and shade or brightness change of the lamp. In the battery charging management IC indicating lamp on the market, when the battery is charging, the indicating lamp is on (that is, the charging is always on), when the battery is fully charged, the full charging is off or turns another color indicating lamp always on, so that the user can clearly know the charging progress and whether the battery is full.

[0003] Through the intuitive indicating lamp display, the user can know the charging condition of the battery at any time, avoids the overcharging or undercharging condition, and improves the use experience of the user.

[0004] However, in the actual application, if the battery is fully charged and turns another color indicating lamp always on, at least two groups of different color indicating lamp modules need to be provided, if the full charging is off, the effective full charging indication cannot be realized, and the user cannot be provided with good use experience. UTILITY MODEL CONTENTS

[0005] The utility model provides a charging indicating lamp control circuit, solves the technical problem that the double color indication cost of existing indicating lamp circuit is high, full charging off experience is poor, and good use experience of the user cannot be provided.

[0006] In order to solve the above technical problem, the utility model provides a charging indicating lamp control circuit, including rectification filter module, voltage stabilizing module, oscillation module, switch module and indicating lamp module connected in sequence, the rectification filter module is connected with the power output end of charging management module, the control end of switch module is connected with oscillation module, first end is with indicating lamp module, second end is connected with the control pin of charging management module, the signal pin of charging management module is still connected between switch module and indicating lamp module.

[0007] The basic scheme is provided with a rectifier filter module, a voltage stabilizing module and an oscillation module connected in sequence for charging indication of a battery, wherein the oscillation module and the switch module are combined for control, the input signal frequency of the switch module is adjusted by adjusting the element parameters, and then the flickering indication of the indicator light module is realized by the switch control of the switch module; the signal pin and the control pin of the charging management module are respectively connected with the indicator light module and the switch module for signal control, when the battery is normally charged, the charging management module turns on the switch module through the control pin, and the flickering indication of the indicator light module is realized by the switch module; when the battery is fully charged, the charging management module short-circuits the switch module through the signal pin, and directly turns on the indicator light module to realize the full-charge continuous indication, which is simple in structure, low in cost and good in user experience.

[0008] In a further embodiment, the rectifier filter module comprises a capacitor C1, a capacitor C2, a diode D1 and a diode D2, one end of the capacitor C1 is connected with the power supply output end of the charging management module, the other end is connected with the positive electrode of the diode D1; the negative electrode of the diode D1 is connected with the voltage stabilizing module; the negative electrode of the diode D2 is connected with the positive electrode of the diode D1, and the positive electrode is grounded; the diode D1 and the diode D2 constitute a rectifier channel; one end of the capacitor C2 is connected with the negative electrode of the diode D2, and the other end is grounded.

[0009] The rectifier filter module of the scheme can significantly improve the stability and reliability of the power supply, reduce electromagnetic interference, adapt to different load conditions, protect the rectifier device and improve the miniaturization of the equipment.

[0010] In a further embodiment, the voltage stabilizing module comprises a resistor R1, a capacitor C3 and a voltage stabilizing diode D3, one end of the resistor R1 is connected with the output end of the rectifier filter module, the other end is connected with the oscillation module; the positive electrode of the voltage stabilizing diode D3 is grounded, and the negative electrode is connected with the other end of the resistor R1; the capacitor C3 is connected in parallel with the voltage stabilizing diode D3.

[0011] The voltage stabilizing module with the voltage stabilizing diode D3 as the core is provided in the scheme, which automatically adjusts and maintains the voltage stability, significantly improves the stability and reliability of the equipment, reduces the failure and maintenance cost, is suitable for various power supply environments, and helps to prolong the service life of the equipment.

[0012] In a further embodiment, the oscillation module comprises a first switch tube Q1, a second switch tube Q2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C4 and a capacitor C5.

[0013] The first end of the first switch tube Q1 is connected with the output end of the voltage stabilizing module through the resistor R2, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R4, and the control end is further connected with the first end of the second switch tube Q2 through the capacitor C5;

[0014] The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is further connected with the first end of the first switch tube Q1 through the capacitor C4;

[0015] The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is further connected with the first end of the first switch tube Q1 through the capacitor C4;

[0016] The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is further connected with the first end of the first switch tube Q1 through the capacitor C4;

[0017] In further embodiments, the first switch tube Q1 is an NPN triode or a PNP triode, and the second switch tube Q2 is an NPN triode or a PNP triode.

[0018] In further embodiments, the switch module comprises a third switch tube Q3, the first end of the third switch tube Q3 is connected with the signal pin of the charge management module and the indicator lamp module, and the second end is connected with the control pin of the charge management module.

[0019] The MOS tube is used for flicker control in the scheme, and the switching speed of the MOS tube is very fast, which is suitable for high-speed switching applications. This enables the MOS tube to respond quickly when controlling the flickering lamp, realizes high-frequency flickering effect, and has the advantages of fast response speed, flexible control, low power consumption, long service life, small size, etc.

[0020] In further embodiments, the indicator lamp module comprises an indicator lamp LED1 and a resistor R6, one end of the resistor R6 is connected with the power input end, the other end is connected with the positive electrode of the indicator lamp LED1, and the negative electrode of the indicator lamp LED1 is connected with the second end of the switch module and the signal pin of the charge management module.

[0021] Only one indicator lamp LED1 is arranged in the scheme, which can realize charging flickering and full charging constant, effectively reducing the cost and the product size.

[0022] In further embodiments, the charge management module at least includes a fourth switch tube Q4 and a charge management chip U1; a power supply end of the charge management chip U1 is connected with the power supply input end, an output end is connected with a control end of the fourth switch tube Q4, a signal pin is connected with the indicator lamp module, and a control pin is connected with the switch module; a first end of the fourth switch tube Q4 is connected with the rectification filtering module and the charging battery, and a second end is connected with the power supply input end.

[0023] The scheme utilizes the charge management chip U1 of the charge management module to perform the indication lamp circuit switching of the charging process and the full charging state, and optimizes the device function without increasing the device cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a system framework diagram of a charging indicator lamp control circuit provided by an embodiment of the utility model;

[0025] Figure 2 is a partial hardware circuit diagram in Figure 1 provided by an embodiment of the utility model;

[0026] Figure 3 is a partial hardware circuit diagram in Figure 1 provided by an embodiment of the utility model;

[0027] Among them: rectification filtering module 1, voltage stabilizing module 2, oscillation module 3, switch module 4, indicator lamp module 5, charge management module 6. DETAILED DESCRIPTION

[0028] The embodiment of the utility model is specifically described below in combination with the drawings, and the embodiment is only for the purpose of description and cannot be understood as the limitation of the utility model, including the drawings are only for reference and description, and do not constitute the limitation of the patent protection range of the utility model, because many changes can be made to the utility model without departing from the spirit and scope of the utility model.

[0029] A charging indicator lamp control circuit provided by an embodiment of the utility model, as shown in Figure 1 、 Figure 2 、 Figure 3 , in the embodiment, rectification filtering module 1, voltage stabilizing module 2, oscillation module 3, switch module 4 and indicator lamp module 5 are sequentially connected; the rectification filtering module 1 is connected with the power supply output end of the charge management module 6; the control end of the switch module 4 is connected with the oscillation module 3, the first end is connected with the indicator lamp module 5, and the second end is connected with the control pin of the charge management module 6; the signal pin of the charge management module 6 is also connected between the switch module 4 and the indicator lamp module 5.

[0030] In the embodiment, the rectification and filtering module 1 comprises a capacitor C1, a capacitor C2, a diode D1 and a diode D2, one end of the capacitor C1 is connected with the power output end of the charge management module 6, the other end is connected with the positive electrode of the diode D1; the negative electrode of the diode D1 is connected with the voltage stabilization module 2; the negative electrode of the diode D2 is connected with the positive electrode of the diode D1, and the positive electrode is grounded; the diode D1 and the diode D2 constitute a rectification channel; one end of the capacitor C2 is connected with the negative electrode of the diode D2, and the other end is grounded.

[0031] The rectification and filtering module 1 of the embodiment can significantly improve the stability and reliability of the power supply, reduce electromagnetic interference, adapt to different load conditions, protect the rectifier device and improve the miniaturization of the equipment by converting alternating current into stable direct current.

[0032] In the embodiment, the voltage stabilization module 2 comprises a resistor R1, a capacitor C3 and a voltage stabilization diode D3, one end of the resistor R1 is connected with the output end of the rectification and filtering module 1, and the other end is connected with the oscillation module 3; the positive electrode of the voltage stabilization diode D3 is grounded, and the negative electrode is connected with the other end of the resistor R1; the capacitor C3 is connected with the voltage stabilization diode D3 in parallel.

[0033] The voltage stabilization module 2 with the voltage stabilization diode D3 as the core is arranged in the embodiment, so as to automatically adjust and maintain the voltage stability, significantly improve the stability and reliability of the equipment, reduce the failure and maintenance cost, be suitable for various power supply environments and help to prolong the service life of the equipment.

[0034] In the embodiment, the oscillation module 3 comprises a first switch tube Q1, a second switch tube Q2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C4 and a capacitor C5.

[0035] The first end of the first switch tube Q1 is connected with the output end of the voltage stabilization module 2 through the resistor R2, the second end is grounded, the control end is connected with the output end of the voltage stabilization module 2 through the resistor R4, and the control end is also connected with the first end of the second switch tube Q2 through the capacitor C5;

[0036] The first end of the second switch tube Q2 is connected with the output end of the voltage stabilization module 2 through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilization module 2 through the resistor R3, and the control end is also connected with the first end of the first switch tube Q1 through the capacitor C4;

[0037] The first end of the second switch tube Q2 is connected with the output end of the voltage stabilization module 2 through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilization module 2 through the resistor R3, and the control end is also connected with the first end of the first switch tube Q1 through the capacitor C4;

[0038] The embodiment utilizes resistance and capacitance elements to generate a sine wave, maintains stable frequency output under various load conditions, ensures the accuracy of flicker control, and realizes different flicker effects by adjusting the frequency and duty cycle.

[0039] In the embodiment, the first switch tube Q1 is an NPN triode or a PNP triode, and the second switch tube Q2 is an NPN triode or a PNP triode.

[0040] In the embodiment, the switch module 4 comprises a third switch tube Q3, a first end of the third switch tube Q3 is connected with a signal pin of the charge management module 6 and the indicator lamp module 5, and a second end is connected with a control pin of the charge management module 6.

[0041] The embodiment sets the MOS tube for flicker control. Since the switching speed of the MOS tube is very fast, it is suitable for high-speed switching applications. This enables the MOS tube to respond quickly when controlling the flickering lamp, realizes high-frequency flickering effect, and has the advantages of fast response speed, flexible control, low power consumption, long service life, small size, etc.

[0042] In the embodiment, the indicator lamp module 5 comprises an indicator lamp LED1 and a resistor R6, one end of the resistor R6 is connected with a power input end, the other end is connected with a positive electrode of the indicator lamp LED1, and a negative electrode of the indicator lamp LED1 is connected with a second end of the switch module 4 and a signal pin of the charge management module 6.

[0043] The embodiment only sets one indicator lamp LED1, which can realize charging flickering and full charging constant, effectively reduces the cost and the product size.

[0044] In the embodiment, the charge management module 6 comprises at least a fourth switch tube Q4 and a charge management chip U1; a power supply end of the charge management chip U1 is connected with the power input end, an output end is connected with a control end of the fourth switch tube Q4, a signal pin is connected with the indicator lamp module 5, and a control pin is connected with the switch module 4; a first end of the fourth switch tube Q4 is connected with the rectifier filter module 1 and the charging battery, and a second end is connected with the power input end.

[0045] Among them, the third switch tube Q3 and the fourth switch tube Q4 are N-channel MOS tubes or P-channel MOS tubes.

[0046] The charging management module 6 is a conventional battery charging management circuit, J1 is connected with a DC input, J2 is connected with a charging battery, and the charging management chip U1 and peripheral devices are a charging management IC and a simplest circuit thereof.

[0047] The embodiment utilizes the charging management chip U1 of the charging management module 6 to switch the indicator lamp circuit in the charging process and the full charging state, and optimizes the device function without increasing the device cost.

[0048] In the embodiment, the charging indication principle is as follows:

[0049] During charging, the 10th pin of the charging management chip U1 outputs a chopping wave, and the rear side of the fourth switch tube Q4 corresponds to the output of high and low levels, thereby providing power for the voltage stabilizing module 2 and the oscillation module 3 through the rectification and filtering module 1; the input signal frequency of the third switch tube Q3 is adjusted through the adjustment element parameter, and then the indicator lamp LED1 is made to flicker at the corresponding frequency through the switching of the third switch tube Q3; after full charging, the 4th pin of the charging management chip U1 is at a low level, and the indicator lamp LED1 is always on.

[0050] The embodiment is double-protected to avoid false indication, that is, when charging, the 3rd pin of the charging management chip U1 is low, and the charging indication lamp control circuit will work only when the charging management chip U1 has a switching chopping output (that is, the charging is truly performed), and the indicator lamp LED1 will be lighted and flickered; after the charging battery is fully charged, the 4th pin of the charging management chip U1 is at a low level, and the indicator lamp LED1 is always on, and the indicator lamp LED1 is not controlled by the third switch tube Q3 at this time, that is, even if the third switch tube Q3 has a flickering signal input, the indicator lamp will not flicker.

[0051] The embodiment of the utility model discloses the charging indication of battery, rectification filtering module 1, voltage stabilizing module 2 are set up and are connected in turn and carry out power output control, wherein, increase oscillation module 3 and switch module 4 and carry out combination control, can pass through the adjustment element parameter adjustment switch module 4 input signal frequency, then through the switching control of switch module 4 realizes the flickering indication of indicator lamp module 5, simultaneously with the signal foot of charging management module 6, control foot respectively with indicator lamp module 5, switch module 4 carry out signal control, when the battery is normally charged, charging management module 6 passes through control foot and turns on switch module 4, provides switch module 4 and realizes the flickering indication of indicator lamp module 5, when the battery is charged, charging management module 6 passes through signal foot and short-circuit switch module 4, directly turns on indicator lamp module 5, realizes full charging and lasts to indicate the structure simple, low in cost, and the user experience is good.

[0052] The above embodiment is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application should be an equivalent replacement mode, and all are included in the protection scope of the present application.

Claims

1. A charge pilot lamp control circuit, characterized by: The rectification filter module, the voltage stabilizing module, the oscillation module, the switch module and the indicator light module are sequentially connected; the rectification filter module is connected with the power output end of the charging management module; the control end of the switch module is connected with the oscillation module, the first end is connected with the indicator light module, and the second end is connected with the control pin of the charging management module; the signal pin of the charging management module is also connected between the switch module and the indicator light module.

2. A charge indicator light control circuit as claimed in claim 1, characterized in that: The rectification filter module comprises a capacitor C1, a capacitor C2, a diode D1 and a diode D2; one end of the capacitor C1 is connected with the power output end of the charging management module, and the other end is connected with the positive electrode of the diode D1; the negative electrode of the diode D1 is connected with the voltage stabilizing module; the negative electrode of the diode D2 is connected with the positive electrode of the diode D1, and the positive electrode is grounded; the diode D1 and the diode D2 constitute a rectification channel; one end of the capacitor C2 is connected with the negative electrode of the diode D2, and the other end is grounded.

3. A charge indicator light control circuit as defined in claim 1, wherein: The voltage stabilizing module comprises a resistor R1, a capacitor C3 and a voltage stabilizing diode D3; one end of the resistor R1 is connected with the output end of the rectification filter module, and the other end is connected with the oscillation module; the positive electrode of the voltage stabilizing diode D3 is grounded, and the negative electrode is connected with the other end of the resistor R1; the capacitor C3 is connected with the voltage stabilizing diode D3 in parallel.

4. A charge indicator light control circuit as defined in claim 1, wherein: The oscillation module comprises a first switch tube Q1, a second switch tube Q2, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C4 and a capacitor C5. The first end of the first switch tube Q1 is connected with the output end of the voltage stabilizing module through the resistor R2, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R4, and the control end is also connected with the first end of the second switch tube Q2 through the capacitor C5; The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is also connected with the first end of the first switch tube Q1 through the capacitor C4; The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is also connected with the first end of the first switch tube Q1 through the capacitor C4; 5. A charge indicator light control circuit as claimed in claim 4, wherein: The first end of the second switch tube Q2 is connected with the output end of the voltage stabilizing module through the resistor R5, the second end is grounded, the control end is connected with the output end of the voltage stabilizing module through the resistor R3, and the control end is also connected with the first end of the first switch tube Q1 through the capacitor C4; 6. A charge indicator light control circuit as defined in claim 1, wherein: The first switch tube Q1 is an NPN triode or a PNP triode, and the second switch tube Q2 is an NPN triode or a PNP triode.

7. A charge indicator light control circuit as defined in claim 1, wherein: The switch module comprises a third switch tube Q3; the first end of the third switch tube Q3 is connected with the signal pin of the charging management module and the indicator light module, and the second end is connected with the control pin of the charging management module. The indicator light module comprises an indicator light LED1 and a resistor R6; one end of the resistor R6 is connected with the power input end, the other end is connected with the positive electrode of the indicator light LED1, the negative electrode of the indicator light LED1 is connected with the second end of the switch module and the signal pin of the charging management module.

8. A charge indicator light control circuit as claimed in claim 7, characterized in that: The charging management module at least includes a fourth switch tube Q4 and a charging management chip U1; a power supply end of the charging management chip U1 is connected with the power supply input end, an output end is connected with a control end of the fourth switch tube Q4, a signal pin is connected with the indicator lamp module, and a control pin is connected with the switch module; a first end of the fourth switch tube Q4 is connected with the rectification and filtering module and the charging battery, and a second end is connected with the power supply input end.

Images