CN115117989A - Charging management system - Google Patents
Charging management system Download PDFInfo
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- CN115117989A CN115117989A CN202211044514.8A CN202211044514A CN115117989A CN 115117989 A CN115117989 A CN 115117989A CN 202211044514 A CN202211044514 A CN 202211044514A CN 115117989 A CN115117989 A CN 115117989A
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- resistor
- module
- charging management
- management chip
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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
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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
- H02J7/007—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
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- 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
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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
- 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
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 further 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 adjustment 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.
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, an eighth pin of the charging management chip is further connected with a seventh resistor, 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 an 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 as to enable the third light-emitting diode to be conducted and 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 current is measured manually by a worker, the direct current signal output by the power supply is regulated by the PWM controller, the monitoring system can monitor in real time, and regulate the alternating current signal output by the power supply when the direct current signal meets the preset condition, so that the regulation efficiency is higher.
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 | |
|
| 2 | Regulating circuit | 11 | Reference electric signal module | |
| L1 | |
12 | Constant current module | |
| L2 | |
13 | Dynamic compensation module | |
| L | |
14 | Current limiting module | |
| | Rectifier diode | 15 | Constant voltage module | |
| C1~C4 | First to |
16 | Status indication module | |
| R1~R11 | First to eleventh resistors | CF1 | First transconductance amplifier | |
| LED1 | First light emitting diode | CF2 | Second transconductance amplifier | |
| LED2 | 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 charging management system according to a first 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 rectifying 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 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 configured to collect the direct current signal, and output 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 supply circuit for LED illumination, a battery charger for DC or various non-DC charging, 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 such as a mobile phone or a tablet computer that needs to be charged, and the embodiment is not limited thereto.
In a 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 transmits no 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 and 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 terminal 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 terminal of the secondary winding L2 is connected with the rectifying circuit 1, and the other end of the secondary winding L2 is grounded.
The number of coils of the primary winding L1, the secondary winding L2, and the auxiliary winding L may be set according to actual conditions, and the present embodiment is not limited thereto.
In a specific implementation, the primary winding L1 and the auxiliary winding L output an ac signal to the rectifier 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 to the dotted terminal of the secondary winding L2, the cathode of the rectifier diode D is connected to the charge management chip U1, the cathode of the rectifier diode D is further connected to the load, the cathode of the rectifier diode D is further connected to the first capacitor C1, and the other end of the first capacitor C1 is connected to 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 ac signal is input from the anode of the rectifier diode D, converted into a dc signal, and then output to the load through the cathode of the rectifier diode D, and 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 driving circuit 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 phototransistor VT is used for inputting the ac signal, and the emitter of the phototransistor 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 remains in an off state, the first light emitting diode LED1 does not emit light, the collector and emitter of the phototransistor VT remain in an off state, and no adjustment signal is output to the collector of the phototransistor VT to the PWM controller; when the first light emitting diode LED1 receives the feedback signal, the first light emitting diode LED1 is turned on and emits light, after the phototriode VT receives the light emitted from the first light emitting diode LED1, the collector and the emitter of the phototriode VT are turned on, and the collector of the phototriode VT outputs an adjustment signal to the PWM controller 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 away from the first light emitting diode LED1, the 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, the second pin of the charging management chip U1 is connected to the cathode of the rectifier diode D, the 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, the 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, and the other end of the third capacitor C3 is connected to one end of the second capacitor R2 away from the second capacitor R2 A fifth resistor R5 is connected to a seventh pin of the charging management chip U1, the other end of the fifth resistor R5 is connected to one end of the third resistor R3, which is close to the load, a sixth resistor R6 is further connected to a seventh pin of the charging management chip U1, the other end of the sixth resistor R6 is connected to a fourth capacitor C4, the other end of the fourth capacitor C4 is connected to one end of the second capacitor C2, which is far from the second resistor R2, an eighth pin of the charging management chip U1 is connected to one end of the second resistor R2, which is far from the second capacitor C2, a seventh resistor R7 is further connected to an eighth pin of the charging management chip U1, the other end of the seventh resistor R7 is grounded, one end of the seventh resistor R7, which is far from the charging management chip U1, is further connected to an eighth resistor R8, the other end of the eighth resistor R8 is connected to one end of the third resistor R3, which is 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 the first pin of the charging management chip U1 is used for outputting a feedback signal to the first light emitting diode LED1, the second pin of the charging management chip U1 is used for inputting a working power supply, and the sixth pin to the eighth pin of the charging management chip U1 are used for collecting a dc signal.
In a specific implementation, the sixth pin to the eighth pin of the charging management chip U1 collect a dc signal, when the dc 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 dc signal satisfies the preset condition, the first pin of the charging management chip U1 outputs the feedback signal to the first light emitting diode LED 1.
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, another 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 another 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 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 LED3 when the load is completely charged, and the third LED3 turns on to emit light when receiving the charging completion signal.
The primary winding L1 and the auxiliary winding L of the present embodiment output an ac signal 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 the direct current signal is 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 dc signal, when the dc 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 dc signal satisfies the preset condition, the first pin of the charging management chip U1 outputs a feedback signal to the first light emitting diode LED 1; 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 remains in the off state, the first light emitting diode LED1 does not emit light, the collector and emitter of the phototransistor VT remain in the off state, and no adjustment signal is output to the collector of the phototransistor VT to the PWM controller; when the first light emitting diode LED1 receives the feedback signal, the first light emitting diode LED1 is turned on 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 turned on, and the collector electrode of the phototriode VT outputs an adjusting signal to the PWM controller to adjust the duty ratio; because this embodiment rectifies alternating current signal through rectifier diode D, and then the direct current signal is gathered to charging management chip U1, when the direct current signal satisfies the preset condition, then can indicate that the direct current signal at this moment does not satisfy the requirement of charging, then charging management chip U1's first pin output feedback signal to first emitting diode LED1, phototriode VT switches on in order to output the regulation 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's 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 LED3 when the load is completely charged, and the third LED3 is turned on to emit light when receiving the charging completion signal, so that the 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 electrical signal module 11 is connected to the constant current module 12, and the constant current module 12 is connected to 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 CF 1;
the first pin of the first transconductance amplifier CF1 is the output terminal of the first transconductance amplifier CF1, the output terminal of the first transconductance amplifier CF1 is the first pin of the charge management chip U1, and the output terminal of the first transconductance amplifier CF1 is configured to output a feedback signal; a second pin of the first transconductance amplifier CF1 is a non-inverting input terminal of the first transconductance amplifier CF1, the non-inverting input terminal of the first transconductance amplifier CF1 is connected to the reference electrical signal module 11 for receiving a first reference current value, a third pin of the first transconductance amplifier CF1 is an inverting input terminal of the first transconductance amplifier CF1, the inverting input terminal of the first transconductance amplifier CF1 is a seventh pin of the charge management chip U1, and the inverting input terminal 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 the ac signal output by the power supply at this time meets the charging requirement, and the output end of the first transconductance amplifier CF1 maintains a high level and has no feedback signal output; when the current value is larger than the first reference current value, the alternating current signal indicating the current output does not satisfy 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, in consideration of the application condition that 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 realize overcurrent protection for the system, at this time, an additional current limiting loop is required to ensure the working safety of the system, 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 CF 2;
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 non-inverting input terminal of the second transconductance amplifier CF2, the non-inverting input terminal 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 terminal of the second transconductance amplifier CF2, the inverting input terminal of the second transconductance amplifier CF2 is a sixth pin of the charge management chip U1, the inverting input terminal of the second transconductance amplifier CF2 is further connected to the dynamic compensation module 13, and the inverting input terminal 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 compensation current value, and transmits the compensation 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 a second reference current value, and compares the second reference current value with the compensation current value, when the compensation 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, and the output terminal of the second transconductance amplifier CF2 maintains a high level and does not output a feedback signal; when the compensation current value is greater than the second reference current value, the ac signal output by the power supply at this time does not satisfy the charging requirement, the output terminal of the second transconductance amplifier CF2 becomes low, 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 to 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 meets 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 CF 3;
the first pin of the third transconductance amplifier CF3 is the output terminal of the third transconductance amplifier CF3, the output terminal of the third transconductance amplifier CF3 is connected to the output terminal of the first transconductance amplifier CF1, the second pin of the third transconductance amplifier CF3 is the non-inverting input terminal of the third transconductance amplifier CF3, the non-inverting input terminal 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 the inverting input terminal of the third transconductance amplifier CF3, the inverting input terminal of the third transconductance amplifier CF3 is the eighth pin of the charge management chip U1, the inverting input terminal of the third transconductance amplifier CF3 is further connected to the dynamic compensation module 13, and the inverting input terminal 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 the inverting input terminal of the third transconductance amplifier CF3, the 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, 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, 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, which 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 becomes 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 charging of the load is completed according to the current value and the voltage value, and output a charging signal to the second light emitting diode LED2 to turn on and emit light if the charging of the load is not completed;
the status indication module 16 is further configured to output a charging completion signal to the third light emitting diode LED3 if the status indication module is yes, so as to turn on and emit light from the third light emitting diode LED 3.
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 the detection of the charging management chip U1.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields will be covered by the present invention.
Claims (10)
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;
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.
2. The charge management system according to claim 1, wherein the power supply source includes 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.
3. The charge management system according to claim 2, wherein the rectifying circuit includes 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.
4. The charge management system of claim 3, wherein the regulation 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.
5. The charging management system according to claim 4, wherein the first pin of the charging management chip is connected to a terminal of the first resistor away from the first LED, the first pin of the charging management chip is further connected to a second capacitor, the other terminal of the second capacitor is connected to a second resistor, the other terminal 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 rectifying 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 terminal 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 terminal of the fourth resistor is connected to a third capacitor, and the other terminal of the third capacitor is connected to a terminal of the second capacitor 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.
6. The charging management system according to claim 5, 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, 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 the 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.
7. The charge management system of claim 6, wherein the charge management chip comprises: 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.
8. The charge management system of claim 7, 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.
9. The charge management system of claim 8, 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.
10. The charge management system of claim 9, 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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