CN111864868B - Quick-charging charger, quick-charging chip and control method of quick-charging charger - Google Patents

Quick-charging charger, quick-charging chip and control method of quick-charging charger Download PDF

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Publication number
CN111864868B
CN111864868B CN202011004670.2A CN202011004670A CN111864868B CN 111864868 B CN111864868 B CN 111864868B CN 202011004670 A CN202011004670 A CN 202011004670A CN 111864868 B CN111864868 B CN 111864868B
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state
charging
discharging
fast
output
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CN111864868A (en
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戴加良
陈卫
梁康楠
秦训家
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Shenzhen Injoinic Technology Co Ltd
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Shenzhen Injoinic Technology Co Ltd
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Priority to CN202110211408.3A priority Critical patent/CN114256943B/en
Priority to CN202011004670.2A priority patent/CN111864868B/en
Priority to CN202110210549.3A priority patent/CN114256906A/en
Publication of CN111864868A publication Critical patent/CN111864868A/en
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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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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

Abstract

The application discloses a quick-charging charger, a quick-charging chip and a control method of the quick-charging charger, wherein the quick-charging charger comprises an AC-DC conversion circuit, a rechargeable battery, a universal USB interface for discharging and outputting, a quick-charging chip, a DC-DC boost circuit, an input switch and an output switch; the quick charging chip is used for detecting whether the AC-DC conversion circuit is connected with the AC voltage or not; detecting whether the discharging output USB interface is accessed by the useless electric equipment; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state. By adopting the embodiment of the application, the practicability of the quick charger can be improved.

Description

Quick-charging charger, quick-charging chip and control method of quick-charging charger
Technical Field
The application relates to the technical field of quick charging, in particular to a quick charging charger, a quick charging chip and a control method of the quick charging charger.
Background
At present, a rechargeable battery is arranged in mobile power supply equipment, so that the rechargeable battery can be used for charging the internal battery to store energy, and other equipment (such as a mobile phone and the like) can also be charged through the battery, but the discharge output end of the mobile power supply equipment can only output the voltage of 5V to the outside, and the mobile power supply equipment cannot support rapid charge and discharge of higher voltage.
Disclosure of Invention
The application provides a quick-charging charger, a quick-charging chip and a control method of the quick-charging charger.
In a first aspect, the present application provides a fast charging charger, including an AC-DC conversion circuit, a rechargeable battery, a discharging output USB interface, a fast charging chip, a DC-DC boost circuit, an input switch, and an output switch;
the AC-DC conversion circuit is connected with the input end of the input switch and the quick charging chip; the output end of the input switch is connected with the input end of the output switch and the DC-DC buck-boost circuit; the control end of the input switch and the control end of the output switch are connected with the quick charging chip; the output end of the output switch is connected with the discharging output USB interface; the DC-DC boost circuit is also connected with the quick charging chip and the rechargeable battery; the discharge output USB interface is also connected with the quick charging chip;
the AC-DC conversion circuit is used for converting the accessed alternating current into direct current and outputting the direct current to the DC-DC boost circuit or the electric equipment accessed by the discharging output USB interface under the control of the quick charging chip;
the DC-DC boost circuit is used for converting the direct-current voltage output by the AC-DC conversion circuit into a battery voltage to charge the rechargeable battery under the control of the quick charging chip, or converting the battery voltage output by the rechargeable battery into the direct-current voltage to supply power to the electric equipment;
the quick charging chip is used for detecting whether the AC-DC conversion circuit is connected with the AC voltage or not; detecting whether the discharging output USB interface is accessed by the electric equipment or not; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state.
In one implementation manner, the fast charging chip includes a control state machine in which the preset control strategy is burned, and a load detection module, a protocol identification module, an AC-DC detection control module, a DC-DC buck-boost detection control module, an input switch control module, and an output switch control module that are independently connected to the control state machine;
the load detection module and the protocol identification module are connected with the discharging output USB interface; the AC-DC detection control module is connected with the AC-DC conversion circuit; the DC-DC buck-boost detection control module is connected with the DC-DC buck-boost circuit; the input switch control module is connected with the input switch; the output switch control module is connected with the output switch;
the load detection module is used for detecting whether the discharging output USB interface is plugged in or pulled out by electric equipment or not and inputting a detected load detection signal to the control state machine;
the protocol identification module is used for identifying whether the electric equipment connected with the discharging output USB interface has a quick charging protocol or not and inputting an identified charging protocol identification signal to the control state machine;
the AC-DC detection control module is used for detecting whether the AC-DC conversion circuit has an AC power supply and inputting a detected power supply connection signal to the control state machine;
and the control state machine is used for controlling the quick charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power connection signal and the preset control strategy.
In one implementation, the preset control strategy includes:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharge output USB interface is not connected with electric equipment, controlling the quick charging charger to enter a standby state;
if the AC-DC conversion circuit is connected with an alternating current power supply in the standby state, the fast charger is controlled to enter a slow charging state, the control state machine controls the AC-DC conversion circuit to output default direct current voltage through the AC-DC detection control module in the slow charging state, and controls the DC-DC boost circuit to normally charge the rechargeable battery through the DC-DC boost detection control module;
if the slow charging state is achieved and the discharging output USB interface is not connected with the electric equipment, the fast charging charger is controlled to enter a fast charging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module and controls the DC-DC boost circuit to fast charge the rechargeable battery through the DC-DC boost detection control module in the fast charging state;
if the rechargeable battery is in the standby state and is started up through a key or the discharging output USB interface is connected to the electric equipment, the quick charging charger is controlled to enter a slow discharging state, and in the slow discharging state, the control state machine controls the DC-DC boost circuit to boost the rechargeable battery to the default direct-current voltage through the DC-DC boost-buck detection control module to normally charge the electric equipment;
if the electric equipment has a fast charging protocol and the fast charging protocol is successfully handshake in the slow discharging state, controlling the fast charging charger to enter a fast discharging state, and controlling the DC-DC buck-boost circuit to fast charge the electric equipment by the control state machine through the DC-DC buck-boost detection control module in the fast discharging state;
if the power equipment is in the slow charging state and the discharging output USB interface is connected with the power equipment, controlling the quick charging charger to enter a slow charging and slow discharging state, and in the slow charging and slow discharging state, controlling the AC-DC conversion circuit to output the default direct-current voltage through the AC-DC detection control module by the control state machine, and turning on the output switch through the output switch control module by the control state machine to normally charge the power equipment;
if the discharging output USB interface is connected with the electric equipment in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the slow charging and slow discharging state is adopted, the power equipment has a fast charging protocol and the fast charging protocol is successfully handshake, the fast charging charger is controlled to enter a fast charging and discharging state, and in the fast charging and discharging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module, and turns on the input switch through the input switch control module to perform fast charging on the power equipment;
and if the AC-DC conversion circuit is connected with an alternating current power supply in the quick discharge state, controlling the quick charging charger to enter the quick charging and discharging state.
In one implementation, the DC-DC buck-boost circuit includes a first MOS transistor, a second MOS transistor, a first resistor, and a first inductor;
the source electrode of the first MOS tube is connected with the output end of the input switch, the grid electrode of the first MOS tube is connected with the DC-DC buck-boost detection control module, the drain electrode of the first MOS tube is connected with one end of the first inductor, and the other end of the first inductor is connected with the rechargeable battery;
two ends of the first resistor are connected in parallel between the source electrode and the grid electrode of the first MOS tube;
the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the inductance measuring end, and the grid electrode of the second MOS tube is connected with the quick charging chip.
In one implementation, the input switch includes a second resistor, and a third MOS transistor and a fourth MOS transistor connected in series;
the drain electrode of the third MOS tube is connected with the AC-DC conversion circuit, the grid electrode of the third MOS tube is connected with the input switch control module, and the source electrode of the third MOS tube is connected with the source electrode of the fourth MOS tube; the grid electrode of the fourth MOS tube is connected with the input switch control module, and the drain electrode of the fourth MOS tube is connected with the input end of the output switch; the second resistor is connected between the source electrode and the grid electrode of the third MOS tube in parallel;
the output switch comprises a fifth MOS transistor and a third resistor;
the source electrode of the fifth MOS tube is connected with the drain electrode of the fourth MOS tube, the drain electrode of the fifth MOS tube is connected with the discharge output USB interface, and the grid electrode of the fifth MOS tube is connected with the output switch control module; the third resistor is connected between the source electrode and the grid electrode of the fifth MOS tube in parallel.
In a second aspect, an embodiment of the present application provides a fast charging chip, which is applied to the fast charging charger of the first aspect, wherein:
the quick charging chip is used for detecting whether an AC-DC conversion circuit of the quick charging charger is connected with an AC voltage; detecting whether a discharging output USB interface of the quick charging charger is accessed by the electric equipment; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state.
In a third aspect, an embodiment of the present application provides a method for controlling a fast charger, which is applied to the fast charging chip of the second aspect, and the method includes:
detecting the state of an AC-DC conversion circuit of the quick charger and the state of a discharging output Universal Serial Bus (USB) interface of the quick charger;
controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state.
In one implementation, the fast charging voltage output by the AC-DC conversion circuit is a fast charging voltage applied by an electric device, and the method further includes:
if the fast charging voltage applied by the electric equipment changes, the output voltage of the AC-DC conversion circuit is adjusted to the fast charging voltage applied by the electric equipment through the AC-DC detection control module, and the output voltage of the DC-DC buck-boost circuit is controlled within a preset range by the DC-DC buck-boost detection control module, wherein the preset range is determined based on the output voltage of the AC-DC conversion circuit.
It can be seen that, in the embodiment of the application, the quick charging chip controls the quick charging charger to enter the target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface, and the preset control strategy, so that the quick charging charger is controlled based on the actual situation, and the practicability of the charger is improved.
Drawings
Fig. 1 is a structural diagram of a quick charger according to an embodiment of the present disclosure;
fig. 2 is a structural diagram of a fast charging chip provided in an embodiment of the present application;
fig. 3 is a structural diagram of a DC-DC buck-boost circuit provided in an embodiment of the present application;
fig. 4 is a circuit diagram of an input switch and an output switch provided in an embodiment of the present application;
fig. 5 is a schematic flowchart of a method for controlling a fast charger according to an embodiment of the present disclosure.
The reference numerals include:
an AC-DC conversion circuit 1; a rechargeable battery 2; a discharge output USB interface 3; a control chip 4; a DC-DC buck-boost circuit 5; an input switch 6; an output switch 7;
a first MOS transistor P1; a second MOS transistor N1;
first to third resistors R1 to R3; a first inductance L1;
the third MOS transistor P2 to the fifth MOS transistor P4.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the present application, including the drawings which are incorporated herein by reference and for purposes of illustration only and are not to be construed as limitations of the claimed application, as many variations thereof are possible without departing from the spirit and scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a quick charger according to an embodiment of the present disclosure, where the quick charger includes an Alternating Current (AC) -Direct Current (DC) conversion circuit 1, a rechargeable battery 2, a Universal Serial Bus (USB) interface 3 for discharging and outputting, and further includes a quick charging chip 4, a DC-DC boost circuit 5, an input switch 6, and an output switch 7;
the AC-DC conversion circuit 1 is connected with the input end of the input switch 6 and the quick charging chip 4; the output end of the input switch 6 is connected with the input end of the output switch 7 and the DC-DC buck-boost circuit 5; the control end of the input switch 6 and the control end of the output switch 7 are connected with the quick charging chip 4; the output end of the output switch 7 is connected with the discharge output USB interface 3; the DC-DC boost circuit 5 is also connected with the quick charging chip 4 and the rechargeable battery 2; the discharge output USB interface 3 is also connected with the quick charge chip 4;
the AC-DC conversion circuit 1 is configured to convert an accessed alternating current into a direct current, and output the direct current to the DC-DC boost circuit 5 or an electric device accessed by the discharge output USB interface 3 under the control of the fast charging chip 4;
the DC-DC buck-boost circuit 5 is configured to convert, under the control of the fast charging chip 4, the DC voltage output by the AC-DC conversion circuit 1 into a battery voltage to charge the rechargeable battery 2, or convert the battery voltage output by the rechargeable battery 2 into a DC voltage to power the electrical device;
the quick charging chip 4 is used for detecting whether the AC-DC conversion circuit 1 is connected with an alternating voltage or not; detecting whether the discharging output USB interface 3 is connected with the electric equipment or not; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit 1, the state of the discharging output USB interface 3 and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state.
In the present embodiment, when the AC-DC conversion circuit is switched in with AC power and the input energy is greater than the output energy, the rechargeable battery 2 will store energy; when the AC-DC conversion circuit is not connected with alternating current or the input energy is less than the output required energy, the rechargeable battery 2 releases the stored energy to the electric equipment to supply power to the electric equipment.
It can be seen that, in the embodiment of the application, the quick charging chip controls the quick charging charger to enter the target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface, and the preset control strategy, so that the quick charging charger is controlled based on the actual situation, and the practicability of the charger is improved.
In an implementation manner of the present application, please refer to fig. 2, the fast charging chip 4 includes a control state machine 41 burned with the preset control policy, and a load detection module 42, a protocol identification module 43, an AC-DC detection control module 44, a DC-DC buck-boost detection control module 45, an input switch control module 46, and an output switch control module 47 that are independently connected to the control state machine 41;
the load detection module 42 and the protocol identification module 43 are connected to the discharging output USB interface 3; the AC-DC detection control module 44 is connected to the AC-DC conversion circuit 1; the DC-DC buck-boost detection control module 45 is connected with the DC-DC buck-boost circuit 5; the input switch control module 46 is connected with the input switch 6; the output switch control module 47 is connected with the output switch 7;
the load detection module 42 is configured to detect whether an electric device is plugged into or unplugged from the discharge output USB interface 3, and input a detected load detection signal to the control state machine 41;
the protocol identification module 43 is configured to identify whether the electric device connected to the discharging output USB interface 3 has a fast charging protocol, and input an identified charging protocol identification signal to the control state machine 41;
the AC-DC detection control module 44 is configured to detect whether an AC power supply is connected to the AC-DC conversion circuit 1, and input a detected power connection signal to the control state machine 41;
and the control state machine 41 is configured to control the quick charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power connection signal, and the preset control policy.
In this application, if the AC-DC detection control module 44 detects that the AC-DC conversion circuit 1 outputs the direct current, it determines that the AC-DC conversion circuit 1 has the AC voltage access, otherwise, it determines that the AC-DC conversion circuit 1 has no AC voltage access, and simultaneously feeds back the power connection signal to the control state machine.
The control state machine 41 may also be implemented by a main program of a Micro Controller Unit (MCU).
It can be seen that, in this application embodiment, fill the chip soon and include a plurality of modules, different parts are connected respectively to different modules to make fill the chip soon and control more rationally, promote the performance of filling the charger soon.
In an implementation manner of the present application, the preset control policy includes:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharge output USB interface is not connected with electric equipment, controlling the quick charging charger to enter a standby state;
if the AC-DC conversion circuit is connected with an alternating current power supply in the standby state, the fast charger is controlled to enter a slow charging state, the control state machine controls the AC-DC conversion circuit to output default direct current voltage through the AC-DC detection control module in the slow charging state, and controls the DC-DC boost circuit to normally charge the rechargeable battery through the DC-DC boost detection control module;
if the slow charging state is achieved and the discharging output USB interface is not connected with the electric equipment, the fast charging charger is controlled to enter a fast charging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module and controls the DC-DC boost circuit to fast charge the rechargeable battery through the DC-DC boost detection control module in the fast charging state;
if the rechargeable battery is in the standby state and is started up through a key or the discharging output USB interface is connected to the electric equipment, the quick charging charger is controlled to enter a slow discharging state, and in the slow discharging state, the control state machine controls the DC-DC boost circuit to boost the rechargeable battery to the default direct-current voltage through the DC-DC boost-buck detection control module to normally charge the electric equipment;
if the electric equipment has a fast charging protocol and the fast charging protocol is successfully handshake in the slow discharging state, controlling the fast charging charger to enter a fast discharging state, and controlling the DC-DC buck-boost circuit to fast charge the electric equipment by the control state machine through the DC-DC buck-boost detection control module in the fast discharging state;
if the power equipment is in the slow charging state and the discharging output USB interface is connected with the power equipment, controlling the quick charging charger to enter a slow charging and slow discharging state, and in the slow charging and slow discharging state, controlling the AC-DC conversion circuit to output the default direct-current voltage through the AC-DC detection control module by the control state machine, and turning on the output switch through the output switch control module by the control state machine to normally charge the power equipment;
if the discharging output USB interface is connected with the electric equipment in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the slow charging and slow discharging state is adopted, the power equipment has a fast charging protocol and the fast charging protocol is successfully handshake, the fast charging charger is controlled to enter a fast charging and discharging state, and in the fast charging and discharging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module, and turns on the input switch through the input switch control module to perform fast charging on the power equipment;
and if the AC-DC conversion circuit is connected with an alternating current power supply in the quick discharge state, controlling the quick charging charger to enter the quick charging and discharging state.
Optionally, the fast charging voltage output by the AC-DC conversion circuit is a fast charging voltage applied by the electric device; or the quick charging voltage output by the AC-DC conversion circuit is preset by the quick charging charger.
Optionally, the fast charging chip is further configured to adjust, by the AC-DC detection control module, the output voltage of the AC-DC conversion circuit to the fast charging voltage currently applied by the electrical device if the fast charging voltage applied by the electrical device changes, and control, by the DC-DC buck-boost detection control module, the output voltage of the DC-DC buck-boost circuit within a preset range, where the preset range is determined based on the output voltage of the AC-DC conversion circuit.
Wherein, the preset range is as follows:
Figure DEST_PATH_IMAGE001
the V is1Is the output voltage of the AC-DC conversion circuit, V2iThe fast charging voltage is applied for the ith time by the electric equipment, and n is the number of times of applying the fast charging voltage by the user equipment.
Optionally, the preset control strategy further includes:
if the AC power supply is detected to be pulled out in the slow charging state, controlling the quick charging charger to enter a standby state;
if the rechargeable battery is detected to be fully charged in the fast charging state, controlling the fast charging charger to enter the slow charging state;
if the AC power supply is detected to be pulled out in the slow charging and slow discharging state, controlling the fast charging charger to enter the slow discharging state;
if the power utilization equipment is detected to be applied for quitting the fast charging in the fast discharging state, controlling the fast charging charger to enter the slow discharging state;
if the power consumption equipment is detected to be full or pulled out in the slow release state, or the quick charger is forcibly turned off through a key, controlling the quick charger to enter a standby state;
if the AC power supply is detected to be pulled out in the charging and discharging state while the fast charging is carried out, controlling the fast charging charger to enter the fast discharging state;
in the quick discharge state, when detecting that the electric equipment is fully charged or pulled out or detecting that the quick charger is forcibly turned off through a key, controlling the quick charger to enter a standby state;
in the charging and discharging state while fast charging, if the electric equipment is detected to apply for quitting the fast charging, controlling the fast charging charger to enter the slow charging and slow discharging state;
and under the slow charging and slow discharging state, if the fact that the electric equipment is fully charged or pulled out is detected, the fast charging charger is controlled to enter the slow charging state.
It can be seen that, in the embodiment of the present application, under the condition that the ac power supply is not connected and the electric device is not connected, the fast charging charger enters the standby state to reduce the power consumption. In the standby state, if an alternating current power supply is connected, the quick charging charger enters a slow charging state to charge the rechargeable battery normally, so that the quick charging charger stores energy slowly. In the slow charging state, if no electric equipment is connected, the quick charging charger enters the quick charging state to quickly charge the rechargeable battery, so that the quick charging charger can quickly store energy. In a standby state, if the mobile phone is started up through a key or the electric equipment is connected, the quick charging charger enters a slow discharging state to charge the electric equipment normally, so that the electric equipment which does not support high-voltage quick charging is prevented from being damaged by output high voltage. In the slow discharge state, if the electric equipment has a quick charge protocol and the quick charge protocol is successfully handshake, the quick charge charger enters the quick discharge state to quickly charge the electric equipment so as to achieve the purpose of quickly charging the electric equipment. In the slow charging state, if the electric equipment is connected, the fast charging charger enters the slow charging and slow discharging state so as to realize the effect of charging and discharging simultaneously. In the fast charging state, if the electric equipment is connected, the fast charging charger enters a slow charging and slow discharging state to prevent the output high voltage from damaging the electric equipment which does not support high-voltage fast charging. Under the slow charging and slow discharging state, if the electric equipment has a fast charging protocol and the handshake is successful, the fast charging charger enters a fast charging and discharging state so as to achieve the effect of fast charging and discharging. In the fast discharging state, if alternating current is connected, the fast charging charger enters a fast charging and discharging state so as to achieve the effect of fast charging and discharging.
In an implementation manner of the present application, referring to fig. 3, the DC-DC buck-boost circuit 5 includes a first Metal Oxide Semiconductor (MOS) transistor P1, a second MOS transistor N1, a first resistor R1, and a first inductor L1;
the source S of the first MOS transistor P1 is connected to the output terminal of the input switch 6, the gate G of the first MOS transistor P1 is connected to the DC-DC buck-boost detection control module 45, the drain D of the first MOS transistor P1 is connected to one end of the first inductor L1, and the other end of the first inductor L1 is connected to the rechargeable battery 2; two ends of the first resistor R1 are connected in parallel between the source S and the gate G of the first MOS transistor P1;
the source S of the second MOS tube N1 is grounded, the drain D of the second MOS tube N1 is connected with the inductance measuring end LX, and the gate G of the second MOS tube N1 is connected with the fast charging chip 4.
The first MOS transistor P1 is a P-channel enhancement type MOS transistor; the second MOS transistor N1 is an N-channel enhancement type MOS transistor.
In an implementation manner of the present application, please refer to fig. 4, the input switch 6 includes a second resistor R2 and a third MOS transistor P2 and a fourth MOS transistor P3 connected in series;
the drain D of the third MOS transistor P2 is connected to the AC-DC conversion circuit 1, the gate G of the third MOS transistor P2 is connected to the input switch control module, and the source S of the third MOS transistor P2 is connected to the source S of the fourth MOS transistor P3; the gate G of the fourth MOS transistor P3 is connected to the input switch control module, and the drain D of the fourth MOS transistor P3 is connected to the input end of the output switch 7; the second resistor R2 is connected in parallel between the source S and the gate G of the third MOS transistor P2;
the output switch 7 comprises a fifth MOS transistor P4 and a third resistor R3;
the source S of the fifth MOS transistor P4 is connected to the drain D of the fourth MOS transistor P3, the drain D of the fifth MOS transistor P4 is connected to the discharge output USB interface 3, and the gate G of the fifth MOS transistor P4 is connected to the output switch control module; the third resistor R3 is connected in parallel between the source S and the gate G of the fifth MOS transistor P4.
The third MOS transistor P2, the fourth MOS transistor P3, and the fifth MOS transistor P4 are P-channel enhancement type MOS transistors.
In one implementation of the present application, the AC-DC conversion circuit 1 includes an AC-DC controller;
the AC-DC controller is coupled to the AC-DC detection control module 44.
The default direct-current voltage is 5V, and the quick charging voltage range is 5-20V.
In the embodiment of the application, under the condition that the alternating-current voltage is connected, the AC-DC detection control module adjusts the output voltage of the AC-DC conversion circuit 1 according to the preset control strategy, so that the AC-DC detection control module outputs the quick charging voltage according to the requirement of the actually connected electric equipment, thereby realizing the quick charging output while charging and discharging, simultaneously increasing the charging power, shortening the charging time and improving the charging efficiency.
Referring to fig. 5, fig. 5 is a schematic flowchart of a control method of a fast charger according to an embodiment of the present application, where the method is applied to the fast charger chip, and includes the following steps:
step 501: detecting the state of an AC-DC conversion circuit of the quick charger and the state of a discharging output Universal Serial Bus (USB) interface of the quick charger;
step 502: controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the charging and discharging control system comprises a standby state, a slow charging state, a fast charging state, a slow discharging state, a fast discharging state, a slow charging and slow discharging state and a fast charging and discharging state.
Optionally, the boosting of the rechargeable battery to charge the electric device needs to have two conditions:
1) the alternating current power supply is connected; 2) the output voltage of the AC-DC conversion circuit is larger than or equal to the voltage of the discharging output USB interface.
Optionally, the fast charging voltage output by the AC-DC conversion circuit is a fast charging voltage applied by the electric device, and the method further includes:
if the fast charging voltage applied by the electric equipment changes, the output voltage of the AC-DC conversion circuit is adjusted to the fast charging voltage applied by the electric equipment through the AC-DC detection control module, and the output voltage of the DC-DC buck-boost circuit is controlled within a preset range by the DC-DC buck-boost detection control module, wherein the preset range is determined based on the output voltage of the AC-DC conversion circuit.
It can be seen that in this application embodiment, when the fast charge voltage that the consumer applied for changes, the chip that fills soon in time adjusts output voltage to satisfy the demand of consumer fast, further promote the performance of filling the charger soon.
It should be noted that the preset control strategy is as described above and will not be described herein.
It can be seen that, in the embodiment of the application, the quick charging chip controls the quick charging charger to enter the target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface, and the preset control strategy, so that the quick charging charger is controlled based on the actual situation, and the practicability of the charger is improved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (6)

1. A quick-charging charger is characterized by comprising an AC-DC conversion circuit, a rechargeable battery, a discharging output USB interface, a quick-charging chip, a DC-DC boost circuit, an input switch and an output switch;
the AC-DC conversion circuit is connected with the input end of the input switch and the quick charging chip; the output end of the input switch is connected with the input end of the output switch and the DC-DC buck-boost circuit; the control end of the input switch and the control end of the output switch are connected with the quick charging chip; the output end of the output switch is connected with the discharging output USB interface; the DC-DC boost circuit is also connected with the quick charging chip and the rechargeable battery; the discharge output USB interface is also connected with the quick charging chip;
the AC-DC conversion circuit is used for converting the accessed alternating current into direct current and outputting the direct current to the DC-DC boost circuit or the electric equipment accessed by the discharging output USB interface under the control of the quick charging chip;
the DC-DC boost circuit is used for converting the direct-current voltage output by the AC-DC conversion circuit into a battery voltage to charge the rechargeable battery under the control of the quick charging chip, or converting the battery voltage output by the rechargeable battery into the direct-current voltage to supply power to the electric equipment;
the quick charging chip is used for detecting whether the AC-DC conversion circuit is connected with the AC voltage or not; detecting whether the discharging output USB interface is accessed by the electric equipment or not; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the method comprises the following steps of standby state, slow charging state, fast charging state, slow discharging state, fast discharging state, slow charging and slow discharging state and fast charging and discharging state;
the quick charging chip comprises a control state machine in which the preset control strategy is burned, and a load detection module, a protocol identification module, an AC-DC detection control module, a DC-DC buck-boost detection control module, an input switch control module and an output switch control module which are independently connected with the control state machine;
the load detection module and the protocol identification module are connected with the discharging output USB interface; the AC-DC detection control module is connected with the AC-DC conversion circuit; the DC-DC buck-boost detection control module is connected with the DC-DC buck-boost circuit; the input switch control module is connected with the input switch; the output switch control module is connected with the output switch;
the load detection module is used for detecting whether the discharging output USB interface is plugged in or pulled out by electric equipment or not and inputting a detected load detection signal to the control state machine;
the protocol identification module is used for identifying whether the electric equipment connected with the discharging output USB interface has a quick charging protocol or not and inputting an identified charging protocol identification signal to the control state machine;
the AC-DC detection control module is used for detecting whether the AC-DC conversion circuit has an AC power supply and inputting a detected power supply connection signal to the control state machine;
the control state machine is used for controlling the quick charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power connection signal and the preset control strategy;
the preset control strategy comprises the following steps:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharge output USB interface is not connected with electric equipment, controlling the quick charging charger to enter a standby state;
if the AC-DC conversion circuit is connected with an alternating current power supply in the standby state, the fast charger is controlled to enter a slow charging state, the control state machine controls the AC-DC conversion circuit to output default direct current voltage through the AC-DC detection control module in the slow charging state, and controls the DC-DC boost circuit to normally charge the rechargeable battery through the DC-DC boost detection control module;
if the slow charging state is achieved and the discharging output USB interface is not connected with the electric equipment, the fast charging charger is controlled to enter a fast charging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module and controls the DC-DC boost circuit to fast charge the rechargeable battery through the DC-DC boost detection control module in the fast charging state;
if the rechargeable battery is in the standby state and is started up through a key or the discharging output USB interface is connected to the electric equipment, the quick charging charger is controlled to enter a slow discharging state, and in the slow discharging state, the control state machine controls the DC-DC boost circuit to boost the rechargeable battery to the default direct-current voltage through the DC-DC boost-buck detection control module to normally charge the electric equipment;
if the electric equipment has a fast charging protocol and the fast charging protocol is successfully handshake in the slow discharging state, controlling the fast charging charger to enter a fast discharging state, and controlling the DC-DC buck-boost circuit to fast charge the electric equipment by the control state machine through the DC-DC buck-boost detection control module in the fast discharging state;
if the power equipment is in the slow charging state and the discharging output USB interface is connected with the power equipment, controlling the quick charging charger to enter a slow charging and slow discharging state, and in the slow charging and slow discharging state, controlling the AC-DC conversion circuit to output the default direct-current voltage through the AC-DC detection control module by the control state machine, and turning on the output switch through the output switch control module by the control state machine to normally charge the power equipment;
if the discharging output USB interface is connected with the electric equipment in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the slow charging and slow discharging state is adopted, the power equipment has a fast charging protocol and the fast charging protocol is successfully handshake, the fast charging charger is controlled to enter a fast charging and discharging state, and in the fast charging and discharging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module, and turns on the input switch through the input switch control module to perform fast charging on the power equipment;
if the AC-DC conversion circuit is connected with an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state;
the fast charging chip is further configured to adjust, by the AC-DC detection control module, the output voltage of the AC-DC conversion circuit to the fast charging voltage currently applied by the electrical device if the fast charging voltage applied by the electrical device changes, and control, by the DC-DC buck-boost detection control module, the output voltage of the DC-DC buck-boost circuit within a preset range, where the preset range is determined based on the output voltage of the AC-DC conversion circuit;
wherein, the preset range is as follows:
Figure 93040DEST_PATH_IMAGE001
the V is1Is the output voltage of the AC-DC conversion circuit, V2iThe fast charging voltage is applied for the ith time by the electric equipment, and n is the number of times of applying the fast charging voltage by the user equipment.
2. A quick-charging charger according to claim 1, wherein said DC-DC buck-boost circuit comprises a first MOS transistor, a second MOS transistor, a first resistor and a first inductor;
the source electrode of the first MOS tube is connected with the output end of the input switch, the grid electrode of the first MOS tube is connected with the DC-DC buck-boost detection control module, the drain electrode of the first MOS tube is connected with one end of the first inductor, and the other end of the first inductor is connected with the rechargeable battery;
two ends of the first resistor are connected in parallel between the source electrode and the grid electrode of the first MOS tube;
the source electrode of the second MOS tube is grounded, the drain electrode of the second MOS tube is connected with the inductance measuring end, and the grid electrode of the second MOS tube is connected with the quick charging chip.
3. A quick-charging charger as recited in claim 1, wherein said input switch comprises a second resistor, and a third MOS transistor and a fourth MOS transistor connected in series;
the drain electrode of the third MOS tube is connected with the AC-DC conversion circuit, the grid electrode of the third MOS tube is connected with the input switch control module, and the source electrode of the third MOS tube is connected with the source electrode of the fourth MOS tube; the grid electrode of the fourth MOS tube is connected with the input switch control module, and the drain electrode of the fourth MOS tube is connected with the input end of the output switch; the second resistor is connected between the source electrode and the grid electrode of the third MOS tube in parallel;
the output switch comprises a fifth MOS transistor and a third resistor;
the source electrode of the fifth MOS tube is connected with the drain electrode of the fourth MOS tube, the drain electrode of the fifth MOS tube is connected with the discharge output USB interface, and the grid electrode of the fifth MOS tube is connected with the output switch control module; the third resistor is connected between the source electrode and the grid electrode of the fifth MOS tube in parallel.
4. A fast charger as defined in claim 1, wherein: the AC-DC conversion circuit comprises an AC-DC controller;
the AC-DC controller is connected with the AC-DC detection control module.
5. A fast-charging chip, which is applied to the fast-charging charger according to any one of claims 1 to 4, wherein:
the quick charging chip is used for detecting whether an AC-DC conversion circuit of the quick charging charger is connected with an AC voltage; detecting whether a discharging output USB interface of the quick charging charger is accessed by the electric equipment; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the method comprises the following steps of standby state, slow charging state, fast charging state, slow discharging state, fast discharging state, slow charging and slow discharging state and fast charging and discharging state;
the quick charging chip comprises a control state machine in which the preset control strategy is burned, and a load detection module, a protocol identification module, an AC-DC detection control module, a DC-DC buck-boost detection control module, an input switch control module and an output switch control module which are independently connected with the control state machine;
the load detection module and the protocol identification module are connected with the discharging output USB interface; the AC-DC detection control module is connected with the AC-DC conversion circuit; the DC-DC buck-boost detection control module is connected with the DC-DC buck-boost circuit; the input switch control module is connected with the input switch; the output switch control module is connected with the output switch;
the load detection module is used for detecting whether the discharging output USB interface is plugged in or pulled out by electric equipment or not and inputting a detected load detection signal to the control state machine;
the protocol identification module is used for identifying whether the electric equipment connected with the discharging output USB interface has a quick charging protocol or not and inputting an identified charging protocol identification signal to the control state machine;
the AC-DC detection control module is used for detecting whether the AC-DC conversion circuit has an AC power supply and inputting a detected power supply connection signal to the control state machine;
the control state machine is used for controlling the quick charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power connection signal and the preset control strategy;
the preset control strategy comprises the following steps:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharge output USB interface is not connected with electric equipment, controlling the quick charging charger to enter a standby state;
if the AC-DC conversion circuit is connected with an alternating current power supply in the standby state, the fast charger is controlled to enter a slow charging state, the control state machine controls the AC-DC conversion circuit to output default direct current voltage through the AC-DC detection control module in the slow charging state, and controls the DC-DC boost circuit to normally charge the rechargeable battery through the DC-DC boost detection control module;
if the slow charging state is achieved and the discharging output USB interface is not connected with the electric equipment, the fast charging charger is controlled to enter a fast charging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module and controls the DC-DC boost circuit to fast charge the rechargeable battery through the DC-DC boost detection control module in the fast charging state;
if the rechargeable battery is in the standby state and is started up through a key or the discharging output USB interface is connected to the electric equipment, the quick charging charger is controlled to enter a slow discharging state, and in the slow discharging state, the control state machine controls the DC-DC boost circuit to boost the rechargeable battery to the default direct-current voltage through the DC-DC boost-buck detection control module to normally charge the electric equipment;
if the electric equipment has a fast charging protocol and the fast charging protocol is successfully handshake in the slow discharging state, controlling the fast charging charger to enter a fast discharging state, and controlling the DC-DC buck-boost circuit to fast charge the electric equipment by the control state machine through the DC-DC buck-boost detection control module in the fast discharging state;
if the power equipment is in the slow charging state and the discharging output USB interface is connected with the power equipment, controlling the quick charging charger to enter a slow charging and slow discharging state, and in the slow charging and slow discharging state, controlling the AC-DC conversion circuit to output the default direct-current voltage through the AC-DC detection control module by the control state machine, and turning on the output switch through the output switch control module by the control state machine to normally charge the power equipment;
if the discharging output USB interface is connected with the electric equipment in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the slow charging and slow discharging state is adopted, the power equipment has a fast charging protocol and the fast charging protocol is successfully handshake, the fast charging charger is controlled to enter a fast charging and discharging state, and in the fast charging and discharging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module, and turns on the input switch through the input switch control module to perform fast charging on the power equipment;
if the AC-DC conversion circuit is connected with an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state;
the fast charging chip is further configured to adjust, by the AC-DC detection control module, the output voltage of the AC-DC conversion circuit to the fast charging voltage currently applied by the electrical device if the fast charging voltage applied by the electrical device changes, and control, by the DC-DC buck-boost detection control module, the output voltage of the DC-DC buck-boost circuit within a preset range, where the preset range is determined based on the output voltage of the AC-DC conversion circuit;
wherein, the preset range is as follows:
Figure 138357DEST_PATH_IMAGE002
the V is1Is the output voltage of the AC-DC conversion circuit, V2iThe fast charging voltage is applied for the ith time by the electric equipment, and n is the number of times of applying the fast charging voltage by the user equipment.
6. A control method of a quick-charging charger is applied to the quick-charging chip of claim 5, and the method comprises the following steps:
detecting the state of an AC-DC conversion circuit of the quick charger and the state of a discharging output USB interface of the quick charger;
controlling the quick charging charger to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface and a preset control strategy, wherein the target state comprises one of the following states: the method comprises the following steps of standby state, slow charging state, fast charging state, slow discharging state, fast discharging state, slow charging and slow discharging state and fast charging and discharging state;
the quick charging chip comprises a control state machine in which the preset control strategy is burned, and an AC-DC detection control module, a DC-DC buck-boost detection control module, an input switch control module and an output switch control module which are independently connected with the control state machine;
the preset control strategy comprises the following steps:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharge output USB interface is not connected with electric equipment, controlling the quick charging charger to enter a standby state;
if the AC-DC conversion circuit is connected with an alternating current power supply in the standby state, the fast charger is controlled to enter a slow charging state, the control state machine controls the AC-DC conversion circuit to output default direct current voltage through the AC-DC detection control module in the slow charging state, and controls the DC-DC boost circuit to normally charge the rechargeable battery through the DC-DC boost detection control module;
if the slow charging state is achieved and the discharging output USB interface is not connected with the electric equipment, the fast charging charger is controlled to enter a fast charging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module and controls the DC-DC boost circuit to fast charge the rechargeable battery through the DC-DC boost detection control module in the fast charging state;
if the rechargeable battery is in the standby state and is started up through a key or the discharging output USB interface is connected to the electric equipment, the quick charging charger is controlled to enter a slow discharging state, and in the slow discharging state, the control state machine controls the DC-DC boost circuit to boost the rechargeable battery to the default direct-current voltage through the DC-DC boost-buck detection control module to normally charge the electric equipment;
if the electric equipment has a fast charging protocol and the fast charging protocol is successfully handshake in the slow discharging state, controlling the fast charging charger to enter a fast discharging state, and controlling the DC-DC buck-boost circuit to fast charge the electric equipment by the control state machine through the DC-DC buck-boost detection control module in the fast discharging state;
if the power equipment is in the slow charging state and the discharging output USB interface is connected with the power equipment, controlling the quick charging charger to enter a slow charging and slow discharging state, and in the slow charging and slow discharging state, controlling the AC-DC conversion circuit to output the default direct-current voltage through the AC-DC detection control module by the control state machine, and turning on the output switch through the output switch control module by the control state machine to normally charge the power equipment;
if the discharging output USB interface is connected with the electric equipment in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the slow charging and slow discharging state is adopted, the power equipment has a fast charging protocol and the fast charging protocol is successfully handshake, the fast charging charger is controlled to enter a fast charging and discharging state, and in the fast charging and discharging state, the control state machine controls the AC-DC conversion circuit to output fast charging voltage through the AC-DC detection control module, and turns on the input switch through the input switch control module to perform fast charging on the power equipment;
if the AC-DC conversion circuit is connected with an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state;
the fast charging voltage output by the AC-DC conversion circuit is the fast charging voltage applied by the electric equipment, and the method further comprises the following steps:
if the fast charging voltage applied by the electric equipment changes, the output voltage of the AC-DC conversion circuit is adjusted to the fast charging voltage applied by the electric equipment through the AC-DC detection control module, and the output voltage of the DC-DC buck-boost circuit is controlled within a preset range through the DC-DC buck-boost detection control module, wherein the preset range is determined based on the output voltage of the AC-DC conversion circuit;
wherein, the preset range is as follows:
Figure 940090DEST_PATH_IMAGE003
the V is1Is the output voltage of the AC-DC conversion circuit, V2iThe fast charging voltage is applied for the ith time by the electric equipment, and n is the number of times of applying the fast charging voltage by the user equipment.
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