CN115117989B - Charging management system - Google Patents

Charging management system Download PDF

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Publication number
CN115117989B
CN115117989B CN202211044514.8A CN202211044514A CN115117989B CN 115117989 B CN115117989 B CN 115117989B CN 202211044514 A CN202211044514 A CN 202211044514A CN 115117989 B CN115117989 B CN 115117989B
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China
Prior art keywords
module
resistor
charging management
management chip
pin
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CN202211044514.8A
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Chinese (zh)
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CN115117989A (en
Inventor
钟世文
钟嘉琪
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Shenzhen Kangyuan Semiconductor Co ltd
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Shenzhen Kangyuan Semiconductor Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage, current or power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to the technical field of charging protection, in particular to a charging management system, which comprises: the charging management circuit comprises a rectifying circuit, a charging management chip and a regulating circuit; the rectifying circuit is used for rectifying the alternating current signal output by the power supply to obtain a direct current signal and outputting the direct current signal to a load; the charging management chip is used for acquiring the direct current signal and outputting a feedback signal to the regulating circuit when the direct current signal meets a preset condition; the adjusting circuit is used for outputting an adjusting signal to the PWM controller when receiving the feedback signal so that the PWM controller adjusts the alternating current signal output by the power supply.

Description

Charging management system
Technical Field
The invention relates to the technical field of charging protection, in particular to a charging management system.
Background
At present, when a battery is charged, a constant-current constant-voltage mode is generally adopted, specifically, a PWM controller adjusts the duty ratio of the PWM controller to enable a power supply to be charged with constant current, when the voltage of the battery reaches a preset value, constant-voltage charging is carried out, the current is gradually reduced, and when the charging current is reduced to zero, a storage battery is fully charged.
However, when the existing method is used for judging whether the power supply is constant current and constant voltage, the method is only carried out in a manual measurement mode by workers, the accuracy of a measurement result is low, and further, the PWM controller is slow in duty ratio adjustment and low in efficiency.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a charging management system, and aims to solve the technical problems that in the prior art, a PWM controller is slow in duty ratio adjustment and low in efficiency due to a manual measurement mode of workers.
In order to achieve the above object, the present invention provides a charging management system, including: the charging management circuit comprises a rectifying circuit, a charging management chip and a regulating circuit;
the rectifying circuit is respectively connected with a power supply, the charging management chip and a load, the charging management chip is respectively connected with the load and the regulating circuit, the regulating circuit is also connected with a PWM (pulse width modulation) controller, and the PWM controller is connected with the power supply;
the rectifying circuit is used for rectifying an alternating current signal output by the power supply to obtain a direct current signal and outputting the direct current signal to the load;
the charging management chip is used for acquiring the direct current signal and outputting a feedback signal to the regulating circuit when the direct current signal meets a preset condition;
and the regulating circuit is used for outputting a regulating signal to the PWM controller when receiving the feedback signal so as to enable the PWM controller to regulate the alternating current signal output by the power supply.
Optionally, the power supply comprises a primary winding, a secondary winding and an auxiliary winding;
the primary winding and the auxiliary winding are used for transmitting the alternating current signal to the secondary winding;
the primary winding is connected with the PWM controller, the dotted end of the auxiliary winding is connected with the PWM controller, the other end of the auxiliary winding is grounded, the other end of the auxiliary winding is also connected with the adjusting circuit, the dotted end of the secondary winding is connected with the rectifying circuit, and the other end of the secondary winding is grounded.
Optionally, the rectifying circuit comprises a rectifying diode and a first capacitor;
the anode of the rectifier diode is connected with the dotted terminal of the secondary winding, the cathode of the rectifier diode is connected with the charging management chip, the cathode of the rectifier diode is also connected with the load, the cathode of the rectifier diode is also connected with the first capacitor, and the other end of the first capacitor is connected with the other end of the secondary winding.
Optionally, the adjusting circuit comprises: the LED comprises a first resistor, a first light emitting diode and a phototriode;
one end of the first resistor is connected with the charging management chip, the other end of the first resistor is connected with a cathode of the first light emitting diode, an anode of the first light emitting diode is respectively connected with a cathode of the rectifier diode and the load, a base of the phototriode is used for inputting the alternating current signals, and an emitting electrode of the phototriode is connected with the other end of the auxiliary winding.
Optionally, the first pin of the charging management chip is connected to one end of the first resistor, which is far away from the first light emitting diode, the first pin of the charging management chip is further connected to a second capacitor, the other end of the second capacitor is connected to a second resistor, the other end of the second resistor is connected to an eighth pin of the charging management chip, the second pin of the charging management chip is connected to the cathode of the rectifier diode, the fifth pin of the charging management chip is grounded, the sixth pin of the charging management chip is connected to a third resistor, the other end of the third resistor is connected to the load, the sixth pin of the charging management chip is further connected to a fourth resistor, the other end of the fourth resistor is connected to a third capacitor, and the other end of the third capacitor is connected to one end of the second capacitor, which is far away from the second resistor, a seventh pin of the charging management chip is connected with a fifth resistor, the other end of the fifth resistor is connected with one end, close to the load, of the third resistor, a sixth resistor is further connected with the seventh pin of the charging management chip, the other end of the sixth resistor is connected with a fourth capacitor, the other end of the fourth capacitor is connected with one end, far away from the second resistor, of the second capacitor, an eighth pin of the charging management chip is connected with one end, far away from the second capacitor, of the second resistor, a seventh resistor is further connected with the eighth pin of the charging management chip, the other end of the seventh resistor is grounded, one end, far away from the charging management chip, of the seventh resistor is further connected with an eighth resistor, the other end of the eighth resistor is connected with one end, close to the fifth resistor, of the third resistor, and the eighth pin of the charging management chip is further connected with a ninth resistor, the other end of the ninth resistor is connected with the cathode of the rectifier diode.
Optionally, a third pin of the charging management chip is further connected to a second light emitting diode, a cathode of the second light emitting diode is connected to the charging management chip, an anode of the second light emitting diode is connected to a tenth resistor, the other end of the tenth resistor is connected to a cathode of the rectifier diode, a fourth pin of the charging management chip is connected to a third light emitting diode, a cathode of the third light emitting diode is connected to a third pin of the charging management chip, an anode of the third light emitting diode is connected to an eleventh resistor, and the other end of the eleventh resistor is connected to a cathode of the rectifier diode.
Optionally, the charging management chip includes: the device comprises a reference electric signal module and a constant current module;
the reference electric signal module is connected with the constant current module, and the constant current module is connected with a first resistor of the regulating circuit;
the reference electric signal module is used for outputting a first reference current value to the constant current module;
the constant current module is used for obtaining a current value corresponding to the direct current signal, judging that the direct current signal meets the preset condition when the current value is larger than the first reference current value, and outputting the feedback signal to the regulating circuit.
Optionally, the charging management chip further includes: the dynamic compensation module and the current limiting module;
the current limiting module is respectively connected with the reference electric signal module and the dynamic compensation module;
the reference electric signal module is also used for outputting a second reference current value to the current limiting module;
the dynamic compensation module is used for compensating the current value to obtain a compensation current value and transmitting the compensation current value to the current limiting module;
and the current limiting module is used for judging that the direct current signal meets the preset condition when the compensation current value is greater than the second reference current value, and outputting a feedback signal to the regulating circuit.
Optionally, the charging management chip further includes: a constant voltage module;
the constant voltage module is respectively connected with the reference electric signal module and the dynamic compensation module;
the reference electric signal module is also used for outputting a reference voltage value to the constant voltage module;
the dynamic compensation module is further configured to obtain a voltage value corresponding to the dc signal, compensate the voltage value to obtain a compensation voltage value, and transmit the compensation voltage value to the constant voltage module;
and the constant voltage module is used for judging that the direct current signal meets the preset condition when the compensation voltage value is greater than the reference voltage value, and outputting a feedback signal to the regulating circuit.
Optionally, the charging management chip further includes: a status indication module;
the state indicating module is connected with the reference electric signal module;
the reference electric signal module is also used for providing a working power supply for the state indicating module;
the state indicating module is used for receiving the current value and the voltage value, judging whether the load is charged or not according to the current value and the voltage value, and if not, outputting a charging signal to the second light-emitting diode so as to enable the light-emitting diode to be conducted and emit light;
and the state indicating module is also used for outputting a charging completion signal to the third light-emitting diode if the state indicating module is in the positive state, so that the third light-emitting diode is conducted to emit light.
The invention comprises the following steps: the charging management circuit comprises a rectifying circuit, a charging management chip and a regulating circuit; the rectifying circuit is respectively connected with a power supply, the charging management chip and a load, the charging management chip is respectively connected with the load and the regulating circuit, the regulating circuit is also connected with a PWM (pulse width modulation) controller, and the PWM controller is connected with the power supply; the rectifying circuit is used for rectifying an alternating current signal output by the power supply to obtain a direct current signal and outputting the direct current signal to the load; the charging management chip is used for acquiring the direct current signal and outputting a feedback signal to the regulating circuit when the direct current signal meets a preset condition; and the regulating circuit is used for outputting a regulating signal to the PWM controller when receiving the feedback signal so as to enable the PWM controller to regulate the alternating current signal output by the power supply. Compared with the prior art that whether the direct current signal is constant or not is manually measured by a worker, the method can monitor in real time, adjusts the alternating current signal output by the power supply when the direct current signal meets the preset condition, and has higher adjustment efficiency.
Drawings
Fig. 1 is a functional block diagram of a charging management system according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a charging management system according to a first embodiment of the charging management system of the present invention;
fig. 3 is a current diagram of a charge management chip in a first embodiment of a charge management system according to an embodiment of the present invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
1 Rectifying circuit LED3 Third light emitting diode
U1 Charging management chip VT Photosensitive triode
2 Regulating circuit 11 Reference electric signal module
L1 Primary winding 12 Constant current module
L2 Secondary winding 13 Dynamic compensation module
L Auxiliary winding 14 Current limiting module
D Rectifier diode 15 Constant voltage module
C1~C4 First to fourth capacitors 16 Status indication module
R1~R11 First to eleventh resistors CF1 First transconductance amplifier
LED1 First light emitting diode CF2 Second transconductance amplifier
LED2 The second light emitting diode CF3 Third transconductance amplifier
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a charging management system according to an embodiment of the present invention.
As shown in fig. 1, the charging management system in this embodiment includes: the charging management circuit comprises a rectifying circuit 1, a charging management chip U1 and a regulating circuit 2;
the rectifier circuit 1 is respectively connected with a power supply, the charging management chip U1 and a load, the charging management chip U1 is respectively connected with the load and the regulating circuit 2, the regulating circuit 2 is also connected with a PWM (pulse-width modulation) controller, and the PWM controller is connected with the power supply;
the rectifier circuit 1 is configured to rectify an alternating current signal output by the power supply to obtain a direct current signal, and output the direct current signal to the load;
the charging management chip U1 is used for acquiring the direct current signal and outputting a feedback signal to the regulating circuit 2 when the direct current signal meets a preset condition;
and the regulating circuit 2 is used for outputting a regulating signal to the PWM controller when receiving the feedback signal, so that the PWM controller regulates the ac electric signal output by the power supply.
It should be noted that the charging management system provided in this embodiment may be applied in a switch-mode AC/DC power supply, a power circuit of LED lighting, a DC or various non-DC charging battery chargers, or other scenes requiring charging.
It can be understood that the PWM controller changes the ac signal output by the power supply by adjusting the duty cycle.
It should be understood that the load may be an electronic device that needs to be charged, such as a mobile phone, a tablet computer, and the like, which is not limited in this embodiment.
In specific implementation, the rectifier circuit 1 firstly rectifies an alternating current signal output by a power supply, and transmits an obtained direct current signal to a load for charging, the charging management chip U1 collects the direct current signal, when the direct current signal does not meet a preset condition, the alternating current signal output by the power supply at the moment meets a charging requirement, the charging management chip U1 does not transmit a feedback signal to the regulating circuit 2, the PWM controller can keep a current duty ratio, and the power supply can correspondingly keep a current state to output the alternating current signal for charging; when the direct current signal meets the preset condition, the alternating current signal output by the power supply does not meet the charging requirement at the moment, the charging management chip U1 outputs a feedback signal to the adjusting circuit 2, when the adjusting circuit 2 receives the feedback signal, the adjusting signal is output to the PWM controller, so that the PWM controller adjusts the duty ratio, the power supply can change the output alternating current signal according to the adjusted duty ratio, and the load is charged through the changed alternating current signal.
Further, referring to fig. 2, fig. 2 is a circuit diagram of a charging management system in a first embodiment of the charging management system according to the embodiment of the present invention.
As shown in fig. 2, the power supply includes a primary winding L1, a secondary winding L2, and an auxiliary winding L;
the primary winding L1 and the auxiliary winding L are used for transmitting the alternating current signal to the secondary winding L2;
the primary winding L1 is connected with the PWM controller, the dotted end of the auxiliary winding L is connected with the PWM controller, the other end of the auxiliary winding L is grounded, the other end of the auxiliary winding L is also connected with the adjusting circuit 2, the dotted end of the secondary winding L2 is connected with the rectifying circuit 1, and the other end of the secondary winding L2 is grounded.
It should be noted that the number of coils of the primary winding L1, the secondary winding L2, and the auxiliary winding L may be set according to actual situations, and this embodiment is not limited thereto.
In a specific implementation, the primary winding L1 and the auxiliary winding L output an ac signal to the rectification circuit 1 according to a duty ratio adjusted by the PWM controller.
Further, as shown in fig. 2, the rectifier circuit 1 includes a rectifier diode D and a first capacitor C1;
the anode of the rectifier diode D is connected with the dotted terminal of the secondary winding L2, the cathode of the rectifier diode D is connected with the charging management chip U1, the cathode of the rectifier diode D is further connected with the load, the cathode of the rectifier diode D is further connected with the first capacitor C1, and the other end of the first capacitor C1 is connected with the other end of the secondary winding L2.
It should be noted that the type of the rectifying diode D may be a 4148 diode, an IN4007 diode, or other diodes capable of achieving rectification.
In a specific implementation, the alternating current signal is input from the anode of the rectifier diode D, converted into a direct current signal, and then output to the load through the cathode of the rectifier diode D, and simultaneously output to the charge management chip U1 through the cathode of the rectifier diode D.
Further, as shown in fig. 2, the adjusting circuit 2 includes: the LED comprises a first resistor R1, a first light emitting diode LED1 and a phototriode VT;
one end of the first resistor R1 is connected to the charging management chip U1, the other end of the first resistor R1 is connected to the cathode of the first light emitting diode LED1, the anode of the first light emitting diode LED1 is connected to the cathode of the rectifier diode D and the load, the base of the phototriode VT is used for inputting the ac signal, and the emitter of the phototriode VT is connected to the other end of the auxiliary winding L.
In a specific implementation, when the first light emitting diode LED1 does not receive the feedback signal output by the charging management chip U1, the first light emitting diode LED1 keeps a cut-off state, the first light emitting diode LED1 does not emit light, a collector and an emitter of the phototriode VT keep a cut-off state, and a collector of the phototriode VT does not output a regulation signal to the PWM controller; when the first light emitting diode LED1 receives the feedback signal, the first light emitting diode LED1 is conducted and emits light, after the phototriode VT receives the light emitted by the first light emitting diode LED1, the collector electrode and the emitter electrode of the phototriode VT are conducted, and the collector electrode of the phototriode VT outputs an adjusting signal to the PWM controller so as to adjust the duty ratio.
Further, as shown in fig. 2, a first pin of the charging management chip U1 is connected to one end of the first resistor R1, which is far from the first light emitting diode LED1, a first pin of the charging management chip U1 is further connected to a second capacitor C2, the other end of the second capacitor C2 is connected to a second resistor R2, the other end of the second resistor R2 is connected to an eighth pin of the charging management chip U1, a second pin of the charging management chip U1 is connected to a cathode of the rectifier diode D, a fifth pin of the charging management chip U1 is grounded, a sixth pin of the charging management chip U1 is connected to a third resistor R3, the other end of the third resistor R3 is connected to the load, a sixth pin of the charging management chip U1 is further connected to a fourth resistor R4, the other end of the fourth resistor R4 is connected to a third capacitor C3, the other end of the third capacitor C3 is connected to one end of the second capacitor C2, which is far from the second resistor R2, the sixth pin of the charging management chip U1 is further connected to a fourth resistor R4, the other end of the charging management chip U4 is connected to a seventh resistor R7, the charging management chip R6 is connected to the second resistor R2, the seventh terminal of the charging management chip U1, the charging management chip R7 is further connected to the second resistor R2, the seventh resistor R7 is connected to the seventh resistor R7, the seventh resistor R7 is connected to the seventh resistor R2, the charging management chip, the terminal of the charging management chip R4, the charging management chip R7 is connected to the charging management chip R7, the other end of the eighth resistor R8 is connected to one end of the third resistor R3 close to the fifth resistor R5, the eighth pin of the charging management chip U1 is further connected to a ninth resistor R9, and the other end of the ninth resistor R9 is connected to the cathode of the rectifier diode D.
It should be noted that a first pin of the charging management chip U1 is configured to output a feedback signal to the first light emitting diode LED1, a second pin of the charging management chip U1 is configured to input a working power supply, and a sixth pin to an eighth pin of the charging management chip U1 are configured to collect a dc signal.
In a specific implementation, the sixth pin to the eighth pin of the charging management chip U1 collect a direct current signal, when the direct current signal does not satisfy a preset condition, the first pin of the charging management chip U1 does not output a feedback signal, and when the direct current signal satisfies the preset condition, the first pin of the charging management chip U1 outputs the feedback signal to the first light emitting diode LED1.
Further, in order to facilitate a user to know a charging state of a load, referring to fig. 2, a third pin of the charging management chip U1 is further connected to a second light emitting diode LED2, a cathode of the second light emitting diode LED2 is connected to the charging management chip U1, an anode of the second light emitting diode LED2 is connected to a tenth resistor R10, the other end of the tenth resistor R10 is connected to a cathode of the rectifier diode D, a fourth pin of the charging management chip U1 is connected to a third light emitting diode LED3, a cathode of the third light emitting diode LED3 is connected to a third pin of the charging management chip U1, an anode of the third light emitting diode LED3 is connected to an eleventh resistor R11, and the other end of the eleventh resistor R11 is connected to a cathode of the rectifier diode D.
It should be noted that the third pin of the charging management chip U1 may be configured to output a charging signal to the second light emitting diode LED2 when the load is charged, and the second light emitting diode LED2 is turned on to emit light when receiving the charging signal; the fourth pin of the charging management chip U1 may be configured to output a charging completion signal to the third light emitting diode LED3 when the load charging is completed, and the third light emitting diode LED3 is turned on to emit light when receiving the charging completion signal.
In the embodiment, the primary winding L1 and the auxiliary winding L output ac signals to the rectifier circuit 1 according to the duty ratio adjusted by the PWM controller; the alternating current signal is input from the anode of the rectifier diode D, converted into a direct current signal and output to a load through the cathode of the rectifier diode D, and meanwhile output to the charging management chip U1 through the cathode of the rectifier diode D; the sixth pin to the eighth pin of the charging management chip U1 collect a direct current signal, when the direct current signal does not satisfy a preset condition, the first pin of the charging management chip U1 does not output a feedback signal, and when the direct current signal satisfies the preset condition, the first pin of the charging management chip U1 outputs a feedback signal to the first light emitting diode LED1; when the first light emitting diode LED1 does not receive the feedback signal output by the charging management chip U1, the first light emitting diode LED1 maintains the cut-off state, the first light emitting diode LED1 does not emit light, the collector and the emitter of the phototriode VT maintain the cut-off state, and the collector of the phototriode VT outputs no adjustment signal to the PWM controller; when the first light emitting diode LED1 receives a feedback signal, the first light emitting diode LED1 is conducted and emits light, after the phototriode VT receives the light emitted by the first light emitting diode LED1, a collector electrode and an emitter electrode of the phototriode VT are conducted, and the collector electrode of the phototriode VT outputs an adjusting signal to the PWM controller to adjust the duty ratio; because this embodiment carries out the rectification to alternating current signal through rectifier diode D, rethread charging management chip U1 gathers direct current signal, then can show that direct current signal at this moment does not satisfy the requirement of charging when direct current signal satisfies the preset condition, then charging management chip U1's first pin output feedback signal to first emitting diode LED1, phototriode VT switches on in order to output regulating signal to PWM controller, and then can real-time supervision power supply's alternating current signal whether accords with the requirement of charging, compare in current staff manual measurement, this embodiment regulation efficiency is higher. Meanwhile, the third pin of the charging management chip U1 may be used to output a charging signal to the second light emitting diode LED2 when the load is charged, and the second light emitting diode LED2 is turned on to emit light when receiving the charging signal; the fourth pin of the charging management chip U1 may be used to output a charging completion signal to the third light emitting diode LED3 when the load is charged, and the third light emitting diode LED3 is turned on to emit light when receiving the charging completion signal, so that a user can know the charging state of the load conveniently.
Referring to fig. 3, fig. 3 is a current diagram of a charge management chip in a first embodiment of a charge management system according to an embodiment of the present invention.
As shown in fig. 3, the charging management chip U1 includes: a reference electric signal module 11 and a constant current module 12;
the reference electric signal module 11 is connected with the constant current module 12, and the constant current module 12 is connected with the first resistor R1 of the regulating circuit 2;
the reference electric signal module 11 is configured to output a first reference current value to the constant current module 12;
the constant current module 12 is configured to obtain a current value corresponding to the dc signal, determine that the dc signal satisfies the preset condition when the current value is greater than the first reference current value, and output the feedback signal to the adjustment circuit 2.
It should be noted that the constant current module 12 may include a first transconductance amplifier CF1;
the first pin of the first transconductance amplifier CF1 is the output end of the first transconductance amplifier CF1, the output end of the first transconductance amplifier CF1 is the first pin of the charging management chip U1, and the output end of the first transconductance amplifier CF1 is used for outputting a feedback signal; a second pin of the first transconductance amplifier CF1 is a positive phase input end of the first transconductance amplifier CF1, the positive phase input end of the first transconductance amplifier CF1 is connected to the reference electrical signal module 11 to receive a first reference current value, a third pin of the first transconductance amplifier CF1 is an inverting input end of the first transconductance amplifier CF1, the inverting input end of the first transconductance amplifier CF1 is a seventh pin of the charging management chip U1, and the inverting input end of the first transconductance amplifier CF1 is used for inputting a current value of a dc electrical signal; the fourth pin of the first transconductance amplifier CF1 is the fifth pin of the charge management chip U1.
In a specific implementation, the third pin of the first transconductance amplifier CF1 collects a current value, and compares the current value with a first reference current value received by the second pin of the first transconductance amplifier CF1, when the current value is smaller than the first reference current value, it indicates that an alternating current signal output by the power supply at the moment meets a charging requirement, and an output end of the first transconductance amplifier CF1 maintains a high level and does not output a feedback signal; when the current value is greater than the first reference current value, the alternating current signal output by the power supply current at the moment does not meet the charging requirement, the output end of the first transconductance amplifier CF1 becomes low level, and a feedback signal is output to the first resistor R1.
Further, considering that for an application situation where the bandwidth of the constant current loop is very low, for example, the bandwidth of a part of the constant current loop of the LED lighting and the charger is usually within a range of 10 to 40hz, and the very slow constant current loop cannot implement overcurrent protection on the system, an additional current limiting loop is required to ensure the working safety of the system at this time, as shown in fig. 3, the charging management chip U1 further includes: a dynamic compensation module 13 and a current limiting module 14;
the current limiting module 14 is connected to the reference electrical signal module 11 and the dynamic compensation module 13 respectively;
the reference electrical signal module 11 is further configured to output a second reference current value to the current limiting module 14;
the dynamic compensation module 13 is configured to compensate the current value to obtain a compensated current value, and transmit the compensated current value to the current limiting module 14;
the current limiting module 14 is configured to determine that the dc signal meets the preset condition when the compensation current value is greater than the second reference current value, and output a feedback signal to the adjusting circuit 2.
It should be noted that the current limiting module 14 includes: a second transconductance amplifier CF2;
the first pin of the second transconductance amplifier CF2 is the output end of the second transconductance amplifier CF2, the output end of the second transconductance amplifier CF2 is connected with the output end of the first transconductance amplifier CF1, and the output end of the second transconductance amplifier CF2 is used for outputting a feedback signal; a second pin of the second transconductance amplifier CF2 is a positive phase input end of the second transconductance amplifier CF2, the positive phase input end of the second transconductance amplifier CF2 is connected to the reference electrical signal module 11 to receive a second reference current value, a third pin of the second transconductance amplifier CF2 is an inverting input end of the second transconductance amplifier CF2, the inverting input end of the second transconductance amplifier CF2 is a sixth pin of the charging management chip U1, the inverting input end of the second transconductance amplifier CF2 is further connected to the dynamic compensation module 13, and the inverting input end of the second transconductance amplifier CF2 is used for inputting a compensation current value.
In a specific implementation, the dynamic compensation module 13 collects a current value corresponding to the dc signal, compensates the collected current value to obtain a compensated current value, and transmits the compensated current value to the inverting input terminal of the second transconductance amplifier CF2, the non-inverting input terminal of the second transconductance amplifier CF2 receives the second reference current value, and compares the second reference current value with the compensated current value, when the compensated current value is smaller than the second reference current value, it indicates that the ac signal output by the power supply at this time meets the charging requirement, the output terminal of the second transconductance amplifier CF2 maintains a high level, and no feedback signal is output; when the compensation current value is greater than the second reference current value, the alternating current signal output by the power supply at the moment is not satisfied with the charging requirement, the output end of the second transconductance amplifier CF2 is changed into low level, and a feedback signal is output to the first resistor R1.
Further, as shown in fig. 3, the charging management chip U1 further includes: a constant voltage module 15;
the constant voltage module 15 is respectively connected with the reference electrical signal module 11 and the dynamic compensation module 13;
the reference electrical signal module 11 is further configured to output a reference voltage value to the constant voltage module 15;
the dynamic compensation module 13 is further configured to obtain a voltage value corresponding to the dc signal, compensate the voltage value to obtain a compensation voltage value, and transmit the compensation voltage value to the constant voltage module 15;
the constant voltage module 15 is configured to determine that the dc signal satisfies the preset condition when the compensation voltage value is greater than the reference voltage value, and output a feedback signal to the adjusting circuit 2.
The constant voltage module 15 includes: a third transconductance amplifier CF3;
the first pin of the third transconductance amplifier CF3 is an output end of the third transconductance amplifier CF3, the output end of the third transconductance amplifier CF3 is connected to the output end of the first transconductance amplifier CF1, the second pin of the third transconductance amplifier CF3 is a non-inverting input end of the third transconductance amplifier CF3, the non-inverting input end of the third transconductance amplifier CF3 is connected to the reference electrical signal module 11 to receive the reference voltage value, the third pin of the third transconductance amplifier CF3 is an inverting input end of the third transconductance amplifier CF3, the inverting input end of the third transconductance amplifier CF3 is an eighth pin of the charge management chip U1, the inverting input end of the third transconductance amplifier CF3 is further connected to the dynamic compensation module 13, and the inverting input end of the third transconductance amplifier CF3 is used for inputting the compensation voltage value.
In a specific implementation, the dynamic compensation module 13 collects a voltage value corresponding to the dc signal, compensates the collected voltage value to obtain a compensation voltage value, and transmits the compensation voltage value to an inverting input terminal of the third transconductance amplifier CF3, where a non-inverting input terminal of the third transconductance amplifier CF3 receives the reference voltage value and compares the reference voltage value with the compensation voltage value, and when the compensation voltage value is smaller than the reference voltage value, it indicates that the ac signal output by the power supply at this time meets the charging requirement, and the output terminal of the third transconductance amplifier CF3 maintains a high level, and no feedback signal is output; when the compensation voltage value is greater than the reference voltage value, it indicates that the ac power signal output by the power supply at this time does not satisfy the charging requirement, the output terminal of the third transconductance amplifier CF3 changes to a high level, and outputs a feedback signal to the first resistor R1.
The charging management chip U1 further includes: a status indication module 16;
wherein, the status indication module 16 is connected with the reference electrical signal module 11;
the reference electrical signal module 11 is further configured to provide a working power supply for the status indication module 16;
the state indicating module 16 is configured to receive the current value and the voltage value, determine whether the charging of the load is completed according to the current value and the voltage value, and if not, output a charging signal to the second light emitting diode LED2 to enable the light emitting diode to be turned on and emit light;
the state indicating module 16 is further configured to output a charging completion signal to the third light emitting diode LED3 if the charging completion signal is positive, so that the third light emitting diode LED3 is turned on to emit light.
In this embodiment, the dynamic compensation module 13 compensates the current value and the voltage value corresponding to the acquired dc signal, and outputs the compensated current value and the compensated voltage value, thereby preventing the influence caused by the resistance in the cable and the internal resistance of the battery, and increasing the accuracy of detection of the charging management chip U1.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (6)

1. A charging management system, characterized in that the charging management system comprises: the charging management circuit comprises a rectifying circuit, a charging management chip and a regulating circuit;
the rectifying circuit is respectively connected with a power supply, the charging management chip and a load, the charging management chip is respectively connected with the load and the regulating circuit, the regulating circuit is also connected with a PWM (pulse width modulation) controller, and the PWM controller is connected with the power supply;
the rectifying circuit is used for rectifying an alternating current signal output by the power supply to obtain a direct current signal and outputting the direct current signal to the load;
the charging management chip is used for acquiring the direct current signal and outputting a feedback signal to the regulating circuit when the direct current signal meets a preset condition;
the regulating circuit is used for outputting a regulating signal to the PWM controller when receiving the feedback signal so as to enable the PWM controller to regulate the alternating current signal output by the power supply;
the power supply comprises a primary winding, a secondary winding and an auxiliary winding;
the primary winding and the auxiliary winding are used for transmitting the alternating current signal to the secondary winding;
the primary winding is connected with the PWM controller, the dotted terminal of the auxiliary winding is connected with the PWM controller, the other end of the auxiliary winding is grounded, the other end of the auxiliary winding is also connected with the regulating circuit, the dotted terminal of the secondary winding is connected with the rectifying circuit, and the other end of the secondary winding is grounded;
the rectifying circuit comprises a rectifying diode and a first capacitor;
the anode of the rectifier diode is connected with the dotted terminal of the secondary winding, the cathode of the rectifier diode is connected with the charging management chip, the cathode of the rectifier diode is also connected with the load, the cathode of the rectifier diode is also connected with the first capacitor, and the other end of the first capacitor is connected with the other end of the secondary winding;
wherein the regulating circuit comprises: the LED comprises a first resistor, a first light emitting diode and a phototriode;
one end of the first resistor is connected with the charging management chip, the other end of the first resistor is connected with the cathode of the first light-emitting diode, the anode of the first light-emitting diode is respectively connected with the cathode of the rectifier diode and the load, the base of the phototriode is used for inputting the alternating current signal, and the emitter of the phototriode is connected with the other end of the auxiliary winding;
wherein, the first pin of the charging management chip is connected with one end of the first resistor far away from the first light emitting diode, the first pin of the charging management chip is further connected with a second capacitor, the other end of the second capacitor is connected with a second resistor, the other end of the second resistor is connected with an eighth pin of the charging management chip, the second pin of the charging management chip is connected with the cathode of the rectifier diode, the fifth pin of the charging management chip is grounded, the sixth pin of the charging management chip is connected with a third resistor, the other end of the third resistor is connected with the load, the sixth pin of the charging management chip is further connected with a fourth resistor, the other end of the fourth resistor is connected with a third capacitor, the other end of the third capacitor is connected with one end of the second capacitor far away from the second resistor, the seventh pin of the charging management chip is connected with a fifth resistor, the other end of the fifth resistor is connected with one end of the third resistor close to the load, the seventh pin of the charging management chip is further connected with a sixth resistor, the other end of the sixth capacitor is connected with one end of the fourth capacitor, the eighth pin is connected with one end of the charging management chip far away from the seventh resistor, the eighth pin is connected with one end of the eighth capacitor, the eighth resistor, the eighth pin is connected with one end of the second capacitor, the eighth resistor, the eighth pin is connected with the eighth pin, the eighth resistor, the eighth pin is connected with the second capacitor, the eighth pin, the eighth resistor, the eighth pin is connected with the eighth pin, the eighth resistor, the other end of the ninth resistor is connected with the cathode of the rectifier diode.
2. The charging management system according to claim 1, wherein a second light emitting diode is further connected to the third pin of the charging management chip, a cathode of the second light emitting diode is connected to the charging management chip, a tenth resistor is connected to an anode of the second light emitting diode, the other end of the tenth resistor is connected to a cathode of the rectifier diode, a third light emitting diode is connected to the fourth pin of the charging management chip, a cathode of the third light emitting diode is connected to the third pin of the charging management chip, an eleventh resistor is connected to an anode of the third light emitting diode, and the other end of the eleventh resistor is connected to a cathode of the rectifier diode.
3. The charge management system according to claim 2, wherein the charge management chip includes: the device comprises a reference electric signal module and a constant current module;
the reference electric signal module is connected with the constant current module, and the constant current module is connected with a first resistor of the regulating circuit;
the reference electric signal module is used for outputting a first reference current value to the constant current module;
the constant current module is used for obtaining a current value corresponding to the direct current signal, judging that the direct current signal meets the preset condition when the current value is larger than the first reference current value, and outputting the feedback signal to the regulating circuit.
4. The charge management system of claim 3, wherein the charge management chip further comprises: the dynamic compensation module and the current limiting module;
the current limiting module is respectively connected with the reference electric signal module and the dynamic compensation module;
the reference electric signal module is also used for outputting a second reference current value to the current limiting module;
the dynamic compensation module is used for compensating the current value to obtain a compensation current value and transmitting the compensation current value to the current limiting module;
and the current limiting module is used for judging that the direct current signal meets the preset condition when the compensation current value is greater than the second reference current value, and outputting a feedback signal to the regulating circuit.
5. The charge management system of claim 4, wherein the charge management chip further comprises: a constant voltage module;
the constant voltage module is respectively connected with the reference electric signal module and the dynamic compensation module;
the reference electric signal module is also used for outputting a reference voltage value to the constant voltage module;
the dynamic compensation module is further configured to obtain a voltage value corresponding to the dc signal, compensate the voltage value to obtain a compensation voltage value, and transmit the compensation voltage value to the constant voltage module;
and the constant voltage module is used for judging that the direct current signal meets the preset condition when the compensation voltage value is greater than the reference voltage value, and outputting a feedback signal to the regulating circuit.
6. The charge management system of claim 5, wherein the charge management chip further comprises: a status indication module;
the state indicating module is connected with the reference electric signal module;
the reference electric signal module is also used for providing a working power supply for the state indicating module;
the state indicating module is used for receiving the current value and the voltage value, judging whether the load is charged or not according to the current value and the voltage value, and if not, outputting a charging signal to the second light-emitting diode so as to enable the light-emitting diode to be conducted and emit light;
and the state indicating module is also used for outputting a charging completion signal to the third light-emitting diode if the state indicating module is in the positive state so as to enable the third light-emitting diode to be conducted and emit light.
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