CN114256943B - Quick charging charger and quick charging chip - Google Patents

Quick charging charger and quick charging chip Download PDF

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Publication number
CN114256943B
CN114256943B CN202110211408.3A CN202110211408A CN114256943B CN 114256943 B CN114256943 B CN 114256943B CN 202110211408 A CN202110211408 A CN 202110211408A CN 114256943 B CN114256943 B CN 114256943B
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China
Prior art keywords
state
charging
fast
fast charging
output
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CN202110211408.3A
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Chinese (zh)
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CN114256943A (en
Inventor
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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    • 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

Abstract

The application discloses a fast charging charger, a fast charging chip and a control method of the fast charging charger, wherein the fast charging charger comprises an AC-DC conversion circuit, a chargeable battery, a discharging output universal USB interface, a fast charging chip, a DC-DC voltage boosting and reducing circuit, an input switch and an output switch; the fast charging chip is used for detecting whether the AC-DC conversion circuit is connected with an alternating voltage or not; detecting whether the electric equipment is connected to the discharge output USB interface; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state. By adopting the embodiment of the application, the practicability of the quick charging charger can be improved.

Description

Quick charging charger and quick charging chip
Technical Field
The application relates to the technical field of quick charging, in particular to a quick charging charger and a quick charging chip.
Background
At present, a rechargeable battery is arranged in the mobile power supply equipment, so that the internal battery can be charged for storing energy, and other equipment (such as a mobile phone and the like) can be charged through the battery, but the discharging output end of the mobile power supply equipment can only output with 5V voltage to the outside, and the rapid charging and discharging of higher voltage cannot be supported.
Disclosure of Invention
The application provides a fast charging charger, a fast charging chip and a control method of the fast charging charger.
In a first aspect, the present application provides a fast charger, including an AC-DC conversion circuit, a rechargeable battery, a discharging output USB interface, a fast charging chip, a DC-DC buck-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 charge 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 charge chip; the output end of the output switch is connected with the discharging output USB interface; the DC-DC buck-boost circuit is also connected with the fast charging chip and the rechargeable battery; the discharging 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 buck-boost circuit or the electric equipment accessed by the discharging output USB interface under the control of the fast charging chip;
the DC-DC step-up and step-down circuit is used for converting the direct current voltage output by the AC-DC conversion circuit into battery voltage to charge the rechargeable battery under the control of the fast charging chip, or converting the battery voltage output by the rechargeable battery into direct current voltage to supply power to the electric equipment;
the fast charging chip is used for detecting whether the AC-DC conversion circuit is connected with an alternating voltage or not; detecting whether the electric equipment is connected to the discharging output USB interface or not; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state.
In an implementation manner, the quick-charging chip comprises a control state machine burnt with the preset control strategy, 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 electric equipment is inserted into or pulled out of the discharging output USB interface 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 to 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 is connected with an AC power supply or not and inputting a detected power supply connection signal to the control state machine;
the control state machine is used for controlling the fast charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power supply connection signal and the preset control strategy.
In an implementation manner, the preset control strategy includes:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharging 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 to an alternating current power supply in the standby state, the fast charging charger is controlled to enter a slow charging state, in the 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, and the control state machine controls the DC-DC voltage-increasing and decreasing circuit to charge the rechargeable battery normally through the DC-DC voltage-increasing and decreasing detection control module;
if the electric equipment is not connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a fast charging state, in the 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 the control state machine controls the DC-DC buck-boost circuit to charge the rechargeable battery fast through the DC-DC buck-boost detection control module;
if the rechargeable battery is started up through a key or the discharging output USB interface is connected to the electric equipment in the standby state, 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 voltage increasing and decreasing circuit to increase the voltage of the rechargeable battery to the default direct current voltage through the DC-DC voltage increasing and decreasing detection control module, so that the electric equipment is charged normally;
if the electric equipment has a fast charging protocol in the slow-release state and the handshake of the fast charging protocol is successful, the fast charging charger is controlled to enter a fast-release state, and in the fast-release state, the control state machine controls the DC-DC buck-boost circuit to charge the electric equipment fast through the DC-DC buck-boost detection control module;
if the electric equipment is connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a slow charging and slow discharging state, in the slow charging and slow discharging state, the control state machine controls the AC-DC conversion circuit to output the default direct current voltage through the AC-DC detection control module, and the control state machine opens the output switch through the output switch control module to carry out common charging on the electric equipment;
if the electric equipment is connected to the discharging output USB interface in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the electric equipment has a fast charging protocol and the handshake of the fast charging protocol is successful in the slow charging and slow discharging state, the fast charging charger is controlled to enter a fast charging and side charging and discharging state, in the fast charging and side 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 the control state machine opens the input switch through the input switch control module to perform fast charging for the electric equipment;
and if the AC-DC conversion circuit is connected to an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state.
In an implementation manner, the DC-DC 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;
the 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 an implementation manner, the input switch comprises a second resistor, a third MOS tube and a fourth MOS tube which are 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 in parallel between the source electrode and the grid electrode of the third MOS tube;
the output switch comprises a fifth MOS tube 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 discharging 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 in parallel between the source electrode and the grid electrode of the fifth MOS tube.
In a second aspect, an embodiment of the present application provides a fast charging chip, which is applied to the fast charging charger in the first aspect, where:
the fast charging chip is used for detecting whether an AC-DC conversion circuit of the fast charging charger is connected with an AC voltage or not; detecting whether the electric equipment is connected to a discharging output USB interface of the fast charging charger; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state.
In a third aspect, an embodiment of the present application provides a control method of a fast charging charger, which is applied to the fast charging chip described in the second aspect, where the method includes:
detecting the state of an AC-DC conversion circuit of the fast charger and detecting the state of a discharge output Universal Serial Bus (USB) interface of the fast charger;
controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state.
In an implementation manner, the fast charging voltage output by the AC-DC conversion circuit is a fast charging voltage applied by the electric equipment, and the method further includes:
and if the fast charging voltage applied by the electric equipment is changed, adjusting the output voltage of the AC-DC conversion circuit to the fast charging voltage applied by the electric equipment through the AC-DC detection control module, and controlling the output voltage of the DC-DC buck-boost circuit 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 fast charging chip controls the fast 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 fast charging charger is controlled based on the actual situation, and the practicability of the charger is improved.
Drawings
Fig. 1 is a block diagram of a quick charger according to an embodiment of the present application;
fig. 2 is a block diagram of a fast-charging chip according to an embodiment of the present application;
fig. 3 is a block 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 flow chart of a control method of a fast charger according to an embodiment of the present application.
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 step-up/down circuit 5; an input switch 6; an output switch 7;
a first MOS transistor P1; a second MOS transistor N1;
the first resistor R1 to the third resistor R3; a first inductance L1;
third MOS transistor P2-fifth MOS transistor P4.
Detailed Description
The following detailed description of the embodiments of the present application is given for the purpose of illustration only and is not to be construed as limiting the application, including the appended drawings are for the purpose of reference and description only, and do not constitute a limitation on the scope of the patent application as many variations of the present application are possible without departing from the spirit and scope of the application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a fast charging charger according to an embodiment of the present application, where the fast charging charger includes an alternating Current (Alternating Current, AC) -Direct Current (DC) conversion circuit 1, a rechargeable battery 2, a discharging output universal serial bus (Universal Serial Bus, USB) interface 3, and further includes a fast charging chip 4, a DC-DC buck-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 charge 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 step-up circuit 5; the control end of the input switch 6 and the control end of the output switch 7 are connected with the quick charge chip 4; the output end of the output switch 7 is connected with the discharging output USB interface 3; the DC-DC buck-boost circuit 5 is also connected with the fast charging chip 4 and the rechargeable battery 2; the discharging output USB interface 3 is also connected with the quick charging chip 4;
the AC-DC conversion circuit 1 is configured to convert the accessed AC into DC, and output the DC to the DC-DC buck-boost circuit 5 or the electric device accessed by the discharging output USB interface 3 under the control of the fast charging chip 4;
the DC-DC step-up/step-down circuit 5 is configured to convert a direct current 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 direct current voltage to supply power to the electric device under the control of the fast charging chip 4;
the fast 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 electric equipment is connected to the discharging output USB interface 3 or not; and confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state.
In this embodiment, when the AC-DC conversion circuit is connected to AC power and the input energy is larger than the output energy, the rechargeable battery 2 stores the energy; when no alternating current is connected to the AC-DC conversion circuit or the input energy is smaller 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 fast charging chip controls the fast 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 fast 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, referring to fig. 2, the fast-charging chip 4 includes a control state machine 41 on which the preset control policy is burnt, 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 with the control state machine 41;
the load detection module 42 and the protocol identification module 43 are connected with 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 the discharging output USB interface 3 has an electrical device inserted or pulled out, 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 the AC-DC conversion circuit 1 has an AC power supply connected thereto, and input a detected power supply connection signal to the control state machine 41;
the control state machine 41 is configured to control the fast 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 the present application, if the AC-DC detection control module 44 detects that the AC-DC conversion circuit 1 outputs DC power, it determines that the AC-DC conversion circuit 1 has AC voltage connected thereto, and otherwise, it determines that the AC-DC conversion circuit 1 has no AC voltage connected thereto, and feeds back a power connection signal to the control state machine.
The control state machine 41 may also be implemented by a main program of a micro control unit (Microcontroller Unit, MCU).
It can be seen that in this application embodiment, quick charge chip includes a plurality of modules, and different parts are connected respectively to different modules to make quick charge chip more rationally control, promote quick charge charger's performance.
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 discharging 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 to an alternating current power supply in the standby state, the fast charging charger is controlled to enter a slow charging state, in the 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, and the control state machine controls the DC-DC voltage-increasing and decreasing circuit to charge the rechargeable battery normally through the DC-DC voltage-increasing and decreasing detection control module;
if the electric equipment is not connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a fast charging state, in the 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 the control state machine controls the DC-DC buck-boost circuit to charge the rechargeable battery fast through the DC-DC buck-boost detection control module;
if the rechargeable battery is started up through a key or the discharging output USB interface is connected to the electric equipment in the standby state, 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 voltage increasing and decreasing circuit to increase the voltage of the rechargeable battery to the default direct current voltage through the DC-DC voltage increasing and decreasing detection control module, so that the electric equipment is charged normally;
if the electric equipment has a fast charging protocol in the slow-release state and the handshake of the fast charging protocol is successful, the fast charging charger is controlled to enter a fast-release state, and in the fast-release state, the control state machine controls the DC-DC buck-boost circuit to charge the electric equipment fast through the DC-DC buck-boost detection control module;
if the electric equipment is connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a slow charging and slow discharging state, in the slow charging and slow discharging state, the control state machine controls the AC-DC conversion circuit to output the default direct current voltage through the AC-DC detection control module, and the control state machine opens the output switch through the output switch control module to carry out common charging on the electric equipment;
if the electric equipment is connected to the discharging output USB interface in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the electric equipment has a fast charging protocol and the handshake of the fast charging protocol is successful in the slow charging and slow discharging state, the fast charging charger is controlled to enter a fast charging and side charging and discharging state, in the fast charging and side 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 the control state machine opens the input switch through the input switch control module to perform fast charging for the electric equipment;
and if the AC-DC conversion circuit is connected to an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state.
Optionally, the fast charging voltage output by the AC-DC conversion circuit is the fast charging voltage applied by the electric equipment; alternatively, the fast charging voltage output by the AC-DC conversion circuit is preset by the fast charging charger.
Optionally, the fast charging chip is further configured to adjust, by the AC-DC detection control module, an output voltage of the AC-DC conversion circuit to a fast charging voltage currently applied by the electric device if the fast charging voltage applied by the electric device changes, and control, by the DC-DC step-up/step-down detection control module, the output voltage of the DC-DC step-up/step-down 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:
the V is 1 V being the output voltage of the AC-DC conversion circuit 2i The i-th fast charging voltage is applied for the electric equipment, and n is the number of times of applying the fast charging voltage for the user equipment.
Optionally, the preset control strategy further includes:
if the alternating current power supply is detected to be pulled out in the slow charging state, controlling the fast 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 alternating current 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 electric equipment is detected to apply to exit the fast charging in the fast discharging state, controlling the fast charging charger to enter the slow discharging state;
if the electric equipment is detected to be full or pulled out or the fast charging charger is detected to be forcibly powered off through a key in the slow-release state, the fast charging charger is controlled to enter a standby state;
if the alternating current power supply is detected to be pulled out in the fast charging and discharging state, controlling the fast charging charger to enter the fast discharging state;
in the fast-release state, detecting that the electric equipment is full or pulled out, or detecting that the fast-charge charger is forced to be turned off by a key, and controlling the fast-charge charger to enter a standby state;
in the fast charging and discharging state, if the fact that the electric equipment applies to exit fast charging is detected, the fast charging charger is controlled to enter the slow charging and discharging state;
and in the slow charging and slow discharging state, if the electric equipment is detected to be full or pulled out, controlling the fast charging charger to enter the slow charging state.
It can be seen that, in the embodiment of the present application, the fast charging charger enters the standby state under the condition that the ac power supply is not connected and the electric equipment is not connected, so as to reduce power consumption. In the standby state, if the AC power supply is connected, the fast charger enters a slow charging state to charge the rechargeable battery normally, so that the fast charger stores energy slowly. Under the slow charge state, if no electric equipment is connected, the fast charge charger enters a fast charge state to charge the rechargeable battery fast, so that the fast charge charger stores energy fast. In the standby state, if the power is turned on through a key or electric equipment is connected, the fast charging charger enters a slow discharging state to charge the electric equipment normally, so that the electric equipment which does not support high-voltage fast charging is prevented from being damaged by the output high voltage. Under the slow-release state, if the electric equipment has a fast charging protocol and the handshake of the fast charging protocol is successful, the fast charging charger enters the fast-release state and charges the electric equipment fast, so that the purpose of fast charging the electric equipment is achieved. Under the slow charge state, if electric equipment is connected, the fast charge charger enters a slow charge and slow discharge state so as to realize the effect of charging and discharging simultaneously. In the fast charging state, if electric equipment is connected, the fast charging charger enters a slow charging and slow discharging state so as 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 handshake is successful, the fast charging charger enters a fast charging and discharging state so as to realize the effect of fast charging and discharging. In the fast discharging state, if the alternating current is connected, the fast charging charger enters the fast charging and discharging state so as to realize 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 (Metal Oxide Semiconductor, MOS) transistor P1, a second MOS transistor N1, a first resistor R1, and a first inductor L1;
the source electrode S of the first MOS transistor P1 is connected to the output end of the input switch 6, the gate electrode G of the first MOS transistor P1 is connected to the DC-DC buck-boost detection control module 45, the drain electrode 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; the two ends of the first resistor R1 are connected in parallel between the source electrode S and the grid electrode G of the first MOS tube P1;
the source electrode S of the second MOS tube N1 is grounded, the drain electrode D of the second MOS tube N1 is connected with the inductance measuring end LX, and the grid electrode G of the second MOS tube N1 is connected with the quick charge chip 4.
The first MOS tube P1 is a P-channel enhanced MOS tube; the second MOS tube N1 is an N-channel enhanced MOS tube.
In an implementation manner of the present application, referring 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 electrode D of the third MOS transistor P2 is connected to the AC-DC conversion circuit 1, the gate electrode G of the third MOS transistor P2 is connected to the input switch control module, and the source electrode S of the third MOS transistor P2 is connected to the source electrode S of the fourth MOS transistor P3; the grid electrode G of the fourth MOS tube P3 is connected with the input switch control module, and the drain electrode D of the fourth MOS tube P3 is connected with the input end of the output switch 7; the second resistor R2 is connected in parallel between the source S and the grid G of the third MOS transistor P2;
the output switch 7 comprises a fifth MOS tube P4 and a third resistor R3;
the source electrode S of the fifth MOS tube P4 is connected with the drain electrode D of the fourth MOS tube P3, the drain electrode D of the fifth MOS tube P4 is connected with the discharge output USB interface 3, and the grid electrode G of the fifth MOS tube P4 is connected with 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 all P-channel enhancement MOS transistors.
In an implementation of the present application, the AC-DC conversion circuit 1 includes an AC-DC controller;
the AC-DC controller is connected to the AC-DC detection control module 44.
Wherein the default direct current voltage is 5V, and the fast charging voltage range is 5-20V.
In the embodiment of the application, under the condition that alternating voltage is connected, the AC-DC detection control module adjusts the output voltage of the AC-DC conversion circuit 1 according to a preset control strategy, so that the output voltage of the AC-DC conversion circuit 1 is output according to the requirement of electric equipment which is actually connected, and therefore quick charging output is realized when charging and discharging are realized, meanwhile, the charging power is increased, the charging time is shortened, and the charging efficiency is improved.
Referring to fig. 5, fig. 5 is a flowchart of a control method of a fast charging charger according to an embodiment of the present application, where the method is applied to the fast charging chip, and includes the following steps:
step 501: detecting the state of an AC-DC conversion circuit of the fast charger and detecting the state of a discharge output Universal Serial Bus (USB) interface of the fast charger;
step 502: controlling the fast 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: standby state, slow charge state, fast charge state, slow release state, fast release state, slow charge and slow release state, fast charge and simultaneously charge and release state.
Optionally, the boosting of the rechargeable battery to charge the electric device requires two conditions:
1) Accessing the alternating current power supply; 2) And the output voltage of the AC-DC conversion circuit is greater than or equal to the voltage of the discharge output USB interface.
Optionally, the fast charging voltage output by the AC-DC conversion circuit is a fast charging voltage applied by the electric equipment, and the method further includes:
and if the fast charging voltage applied by the electric equipment is changed, adjusting the output voltage of the AC-DC conversion circuit to the fast charging voltage applied by the electric equipment through the AC-DC detection control module, and controlling the output voltage of the DC-DC buck-boost circuit 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, when the quick charging voltage applied by the electric equipment changes, the quick charging chip timely adjusts the output voltage so as to quickly meet the requirements of the electric equipment and further improve the performance of the quick charging charger.
It should be noted that, the preset control strategy is described above, and will not be described here.
It can be seen that in the embodiment of the application, the fast charging chip controls the fast 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 fast charging charger is controlled based on the actual situation, and the practicability of the charger is improved.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.

Claims (8)

1. The quick charging charger is characterized by comprising an Alternating Current (AC) -Direct Current (DC) conversion circuit, a chargeable battery, a discharging output Universal Serial Bus (USB) interface, a quick charging chip, a DC-DC buck-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 charge 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 charge chip; the output end of the output switch is connected with the discharging output USB interface; the DC-DC buck-boost circuit is also connected with the fast charging chip and the rechargeable battery; the discharging 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 buck-boost circuit or the electric equipment accessed by the discharging output USB interface under the control of the fast charging chip;
the DC-DC step-up and step-down circuit is used for converting the direct current voltage output by the AC-DC conversion circuit into battery voltage to charge the rechargeable battery under the control of the fast charging chip, or converting the battery voltage output by the rechargeable battery into direct current voltage to supply power to the electric equipment;
the fast charging chip is used for detecting whether the AC-DC conversion circuit is connected with an alternating voltage or not; detecting whether the electric equipment is connected to the discharging output USB interface or not; confirming whether the accessed electric equipment starts a quick charging protocol or not; the fast charging charger is controlled to enter a target state according to the state of the AC-DC conversion circuit, the state of the discharging output USB interface, the fast charging protocol starting state of the electric equipment and a preset control strategy;
wherein the target state comprises one of the following: a standby state, a slow charge state, a fast charge state, a slow discharge state, a fast discharge state, a slow charge and slow discharge state, and a fast charge and discharge state;
wherein, the liquid crystal display device comprises a liquid crystal display device,
the fast charging voltage output by the AC-DC conversion circuit is the fast charging voltage applied by the electric equipment,
and if the fast charging voltage of the electric equipment application is changed, adjusting the output voltage of the AC-DC conversion circuit to the fast charging voltage of the electric equipment application through an AC-DC detection control module in the fast charging chip, and controlling the output voltage of the DC-DC step-up and step-down circuit within a preset range by the DC-DC step-up and step-down detection control module, wherein the preset range is determined based on the output voltage of the AC-DC conversion circuit and the fast charging voltage of the electric equipment application in a combined way.
2. The quick charge charger of claim 1, wherein the quick charge chip comprises a control state machine programmed with the preset control strategy, 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 electric equipment is inserted into or pulled out of the discharging output USB interface 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 to 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 is connected with an AC power supply or not and inputting a detected power supply connection signal to the control state machine;
the control state machine is used for controlling the fast charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power supply connection signal and the preset control strategy.
3. The quick charger of claim 2, wherein the preset control strategy comprises:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharging 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 to an alternating current power supply in the standby state, the fast charging charger is controlled to enter a slow charging state, in the 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, and the control state machine controls the DC-DC voltage-increasing and decreasing circuit to charge the rechargeable battery normally through the DC-DC voltage-increasing and decreasing detection control module;
if the electric equipment is not connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a fast charging state, in the 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 the control state machine controls the DC-DC buck-boost circuit to charge the rechargeable battery fast through the DC-DC buck-boost detection control module;
if the rechargeable battery is started up through a key or the discharging output USB interface is connected to the electric equipment in the standby state, 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 voltage increasing and decreasing circuit to increase the voltage of the rechargeable battery to the default direct current voltage through the DC-DC voltage increasing and decreasing detection control module, so that the electric equipment is charged normally;
if the electric equipment has a fast charging protocol in the slow-release state and the handshake of the fast charging protocol is successful, the fast charging charger is controlled to enter a fast-release state, and in the fast-release state, the control state machine controls the DC-DC buck-boost circuit to charge the electric equipment fast through the DC-DC buck-boost detection control module;
if the electric equipment is connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a slow charging and slow discharging state, in the slow charging and slow discharging state, the control state machine controls the AC-DC conversion circuit to output the default direct current voltage through the AC-DC detection control module, and the control state machine opens the output switch through the output switch control module to carry out common charging on the electric equipment;
if the electric equipment is connected to the discharging output USB interface in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the electric equipment has a fast charging protocol and the handshake of the fast charging protocol is successful in the slow charging and slow discharging state, the fast charging charger is controlled to enter a fast charging and side charging and discharging state, in the fast charging and side 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 the control state machine opens the input switch through the input switch control module to perform fast charging for the electric equipment;
and if the AC-DC conversion circuit is connected to an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state.
4. A quick charger according to claim 2 or 3, wherein the DC-DC boost-buck 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;
the 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.
5. The quick charger according to claim 2 or 3, wherein the input switch comprises a second resistor, a third MOS tube and a fourth MOS tube which are 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 in parallel between the source electrode and the grid electrode of the third MOS tube;
the output switch comprises a fifth MOS tube 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 discharging 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 in parallel between the source electrode and the grid electrode of the fifth MOS tube.
6. A fast charging chip, characterized by being applied to the fast charging charger of any one of claims 1-5, wherein:
the fast charging chip is used for detecting whether an Alternating Current (AC) -Direct Current (DC) conversion circuit of the fast charging charger is connected with an alternating voltage or not; detecting whether the electric equipment is connected to a discharging output Universal Serial Bus (USB) interface of the fast charging charger; confirming whether the accessed electric equipment starts a quick charging protocol or not; and controlling the fast 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, the fast charging protocol starting state of the electric equipment and a preset control strategy.
7. The quick charge chip of claim 6, wherein the quick charge chip comprises a control state machine programmed with the preset control strategy, 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 electric equipment is inserted into or pulled out of the discharging output USB interface 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 to 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 is connected with an AC power supply or not and inputting a detected power supply connection signal to the control state machine;
the control state machine is used for controlling the fast charging charger to enter a target state according to the load detection signal, the charging protocol identification signal, the power supply connection signal and the preset control strategy.
8. The fast charge chip of claim 7, wherein the preset control strategy comprises:
if the AC-DC conversion circuit is not connected with an alternating current power supply and the discharging 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 to an alternating current power supply in the standby state, the fast charging charger is controlled to enter a slow charging state, in the 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, and the control state machine controls the DC-DC voltage-increasing and decreasing circuit to charge the rechargeable battery normally through the DC-DC voltage-increasing and decreasing detection control module;
if the electric equipment is not connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a fast charging state, in the 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 the control state machine controls the DC-DC buck-boost circuit to charge the rechargeable battery fast through the DC-DC buck-boost detection control module;
if the rechargeable battery is started up through a key or the discharging output USB interface is connected to the electric equipment in the standby state, 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 voltage increasing and decreasing circuit to increase the voltage of the rechargeable battery to the default direct current voltage through the DC-DC voltage increasing and decreasing detection control module, so that the electric equipment is charged normally;
if the electric equipment has a fast charging protocol in the slow-release state and the handshake of the fast charging protocol is successful, the fast charging charger is controlled to enter a fast-release state, and in the fast-release state, the control state machine controls the DC-DC buck-boost circuit to charge the electric equipment fast through the DC-DC buck-boost detection control module;
if the electric equipment is connected to the discharging output USB interface in the slow charging state, the fast charging charger is controlled to enter a slow charging and slow discharging state, in the slow charging and slow discharging state, the control state machine controls the AC-DC conversion circuit to output the default direct current voltage through the AC-DC detection control module, and the control state machine opens the output switch through the output switch control module to carry out common charging on the electric equipment;
if the electric equipment is connected to the discharging output USB interface in the fast charging state, controlling the fast charging charger to enter the slow charging and slow discharging state;
if the electric equipment has a fast charging protocol and the handshake of the fast charging protocol is successful in the slow charging and slow discharging state, the fast charging charger is controlled to enter a fast charging and side charging and discharging state, in the fast charging and side 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 the control state machine opens the input switch through the input switch control module to perform fast charging for the electric equipment;
and if the AC-DC conversion circuit is connected to an alternating current power supply in the fast discharging state, controlling the fast charging charger to enter the fast charging and discharging state.
CN202110211408.3A 2020-09-22 2020-09-22 Quick charging charger and quick charging chip Active CN114256943B (en)

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