CN218958568U

CN218958568U - Backup power supply with bidirectional quick charging function

Info

Publication number: CN218958568U
Application number: CN202222174087.7U
Authority: CN
Inventors: 郑志模
Original assignee: Shenzhen Sikai Semiconductor Co ltd
Current assignee: Shenzhen Sikai Semiconductor Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-05-02
Anticipated expiration: 2032-08-17

Abstract

The application relates to the technical field of power supplies, in particular to a backup power supply with a bidirectional quick charging function, which comprises a bidirectional quick charging module, a control module and a lifting pressure module, wherein the control module is electrically connected with the bidirectional quick charging module and the lifting pressure module, and the bidirectional quick charging module is electrically connected with the lifting pressure module; the bidirectional quick charge module is used for judging and identifying the information of the access equipment and the charge and discharge request, sending a signal to the control module, and receiving the charge and discharge signal output by the control module to complete charge and discharge work; the buck-boost module is used for receiving the output signal of the control module and adjusting the charge-discharge voltage according to the control signal. The backup power supply with the bidirectional quick charging function can adapt to quick charging equipment for charging.

Description

Backup power supply with bidirectional quick charging function

Technical Field

The application relates to the technical field of power supplies, in particular to a backup power supply with a bidirectional quick charging function.

Background

At present, along with the increasing of the demands of users, the functions of electronic equipment are updated and perfected continuously, and the power consumption of the users for using the electronic equipment is increased, so that in order to shorten the charging time of the electronic equipment, most of the devices such as mobile phones and computers on the market are provided with a quick charging function.

Meanwhile, the user can carry the mobile power supply with him to meet the charging requirement under the condition that the charging condition is not allowed when going out, but most of the mobile power supplies sold in the market and the shared mobile power supply do not have the quick charging function, and meanwhile, the types of interfaces for the electronic equipment to be inserted are less, and the electronic equipment with the quick charging function is not suitable for the existing electronic equipment.

It is therefore highly desirable to provide a new backup power supply that can be adapted to charge a fast-charging device.

Disclosure of Invention

In order to charge the quick-charging device, the application provides a backup power supply with a bidirectional quick-charging function.

The application provides a reserve power supply with two-way quick charge function adopts following technical scheme: a backup power supply with a bidirectional quick charging function is characterized in that: the control module is electrically connected with the bidirectional quick charging module and the lifting pressure module, and the bidirectional quick charging module is electrically connected with the lifting pressure module, wherein the control module comprises a main control MCU chip and is used for acquiring equipment access signals, receiving and responding to the access information, and outputting control signals to control the charging and discharging operation of the whole backup power supply; the bidirectional quick charge module is used for judging and identifying the information of the access equipment and the charge and discharge request, sending a signal to the control module, and receiving the charge and discharge signal output by the control module to complete charge and discharge work; the buck-boost module is used for receiving the output signal of the control module and adjusting the charge-discharge voltage according to the control signal.

By adopting the technical scheme, the two-way quick charging module is used for judging the access of the external equipment or the charger, acquiring the information of the access equipment or the charger, outputting an access signal to the control module to inform the control module of acquiring the equipment information of the access equipment, acquiring the charge and discharge request of the equipment according to the equipment information, and controlling the voltage-lifting module to adjust the voltage range according to the equipment request so as to realize the discharge control or the charge control of the battery.

Preferably, the bidirectional fast charging module comprises a bidirectional charging and discharging unit, the bidirectional charging and discharging unit is electrically connected with the control module, the bidirectional charging and discharging unit comprises a fast charging protocol chip and a socket, and the socket is connected with the fast charging protocol chip and is used for inserting equipment or a charger; the fast charging protocol chip is used for identifying the equipment access signal and notifying the control module to read the equipment access information.

By adopting the technical scheme, the bidirectional charge and discharge unit is matched with the control module, so that the control module receives the access signal and information of the electric equipment or the charger and controls the bidirectional charge and discharge unit to realize bidirectional charge and discharge work.

Preferably, a first MOS tube is arranged between the voltage-boosting module and the bidirectional charge-discharge unit, a control electrode of the first MOS tube is connected with a fast charge protocol chip, and the fast charge protocol chip controls the on or off of the first MOS tube to control charge-discharge operation.

By adopting the technical scheme, the on-off of the first MOS tube is controlled by the fast charge protocol chip, so that charge and discharge work is realized.

Preferably, the bidirectional fast charging module comprises a discharging unit, the discharging unit comprises a fast charging output chip and a discharging interface, the discharging interface is connected with the fast charging output chip, the fast charging output chip receives voltage required by a charging protocol of the accessed electric equipment through the discharging interface and sends a charging request signal to the control module, and the control module receives the signal and controls the fast charging output chip to regulate voltage so as to complete charging work of the accessed electric equipment.

By adopting the technical scheme, the discharging unit is matched with the control module, and the control module controls the fast charging output chip to regulate the voltage so as to realize the discharging work of the backup power supply.

Preferably, a fast charging starting circuit is arranged between the control module and the discharging unit, the fast charging starting circuit comprises a second MOS tube, a first triode and a first resistor, a control electrode of the second MOS tube is connected between a collector electrode of the first triode and the first resistor, a base electrode of the first triode is connected with the main control MCU chip, and the main control MCU chip controls the fast charging starting circuit to be turned on or turned off.

Through adopting above-mentioned technical scheme, the setting of second MOS pipe, first triode and first resistance is in order to let quick charge starting circuit switch on work, and through the switching on or cut off of quick charge starting circuit with the drive discharge unit work.

Preferably, the buck-boost module comprises a buck-boost control chip, a buck-boost driving circuit is arranged between the buck-boost control chip and the bidirectional charge-discharge unit, the buck-boost driving circuit comprises a third MOS tube, a fourth MOS tube, a fifth MOS tube, a sixth MOS tube, a seventh MOS tube and a first inductor, the buck-boost control chip controls the third MOS tube to be turned on or turned off to control charge-discharge operation, the buck-boost control chip controls the on-off PWM width of the fourth MOS tube, the fifth MOS tube, the sixth MOS tube and the seventh MOS tube, the fourth MOS tube and the fifth MOS tube charge the first inductor when being conducted, and the sixth MOS tube and the seventh MOS tube discharge the first inductor when being conducted.

By adopting the technical scheme, the buck-boost module is matched with the control module and the bidirectional charge-discharge unit, and performs buck-boost operation by combining information of the access equipment, so that the conversion from input voltage to output voltage is realized; the voltage-regulating driving circuit realizes the driving of voltage-regulating work.

Preferably, the control module is electrically connected with an electric quantity display circuit for displaying electric quantity.

By adopting the technical scheme, the real-time electric quantity display of the access equipment is realized, and a user can grasp the charging process conveniently.

Preferably, the control module is externally connected with a thermistor and is used for detecting the temperature of the battery cell.

Through adopting above-mentioned technical scheme, realize the temperature detection to the electric core, prevent that the battery from causing the damage when the high temperature of charging.

Preferably, the control module is connected with a battery protection circuit, the battery protection circuit comprises a battery protection chip, a charging MOS tube and a discharging MOS tube, and the battery protection chip controls the on or off of the charging MOS tube and the discharging MOS tube, so that the charging MOS tube and the discharging MOS tube are cut off for fault.

By adopting the technical scheme, the battery protection circuit realizes overcharge protection, overdischarge protection and overcurrent protection of the battery.

Preferably, a battery protection driving circuit is arranged between the battery protection chip and the control module, the battery protection driving circuit is connected with the battery protection driving circuit, the battery protection driving circuit comprises an eighth MOS tube, a second triode and a third resistor, a control electrode of the eighth MOS tube is connected between a collector electrode of the second triode and the third resistor, a base electrode of the second triode is connected with the main control MCU chip, and the main control MCU chip enables the battery protection driving circuit to be conducted or cut off to control the battery protection circuit to work.

By adopting the technical scheme, the battery protection driving circuit is turned on or off to drive the battery protection circuit, and the work of the battery protection circuit is controlled.

Compared with the related art, the embodiment of the application provides a backup power supply with a bidirectional quick charge function, a bidirectional quick charge module, a control module and a boost-buck module are arranged, external equipment or charger access is judged through the bidirectional quick charge module, information of the access equipment or the charger is acquired, an access signal is output to the control module to inform the control module to acquire equipment information of the access equipment, a charge-discharge request of the equipment is acquired according to the equipment information, and the control module controls the boost-buck module to adjust a voltage range according to the equipment request so as to realize discharge control or charge control of a battery, and an effect of charging the quick charge equipment is realized.

Drawings

Fig. 1 is a schematic structural diagram of a backup power supply with a bidirectional fast charging function according to an embodiment of the present application;

FIG. 2 is a circuit diagram of a backup power control module with bi-directional fast charging in accordance with an embodiment of the present application;

FIG. 3 is a circuit diagram of a backup power outlet with bi-directional fast-charge function according to an embodiment of the present application;

fig. 4 is a circuit diagram of a bidirectional charge and discharge unit and a buck-boost module of a backup power supply with a bidirectional fast charge function according to an embodiment of the present application;

FIG. 5 is a circuit diagram of a discharge unit and a fast charge start circuit of a backup power supply with a bi-directional fast charge function according to an embodiment of the present application;

fig. 6 is a circuit diagram of a power display and a circuit diagram of a high-low temperature protection of a battery cell of a backup power supply with a bidirectional fast charging function according to an embodiment of the present application;

fig. 7 is a circuit diagram of a battery protection circuit and a battery protection driving circuit of a backup power supply with a bidirectional fast charging function according to an embodiment of the present application.

Reference numerals illustrate: 1. a two-way quick charging module; 11. a bidirectional charge and discharge unit; 111. a socket; 12. A discharge unit; 4. a quick charge starting circuit; 2. a control module; 3. a buck-boost module; 5. a step-up/down driving circuit; 6. an electric quantity display circuit; 7. the high-low temperature protection circuit of the battery cell; 8. a battery protection circuit; 9. the battery protects the drive circuit.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-7.

The embodiment of the application discloses a backup power supply with a bidirectional quick charging function. Referring to fig. 1, a backup power supply with a bidirectional quick charge function includes a bidirectional quick charge module 1, a control module 2, and a buck-boost module 3. The bidirectional quick charging module 1 is used for judging whether equipment is accessed, outputting an access signal when the equipment is accessed, and acquiring equipment information of the access equipment; the control module 2 is connected with the bidirectional quick charge module 1 and is used for acquiring equipment access signals, receiving and responding to equipment information and outputting control signals; the buck-boost module 3 is connected to the control module 2, and is configured to receive the control signal and adjust the charging voltage or the discharging voltage according to the control signal. When the equipment is connected to the backup power supply, the bidirectional fast charging module 1 judges that external equipment is connected and acquires equipment information of the connected equipment, meanwhile, the bidirectional fast charging module 1 outputs a connection signal to initiate interruption to the control module 2, the control module 2 acquires the equipment information of the connected equipment and acquires the equipment request according to the equipment information, the equipment request comprises a charging request and a discharging request, and the control module 2 controls the buck-boost module 3 to adjust a voltage range according to the equipment request so as to realize discharging control or charging control of the battery.

As shown in fig. 2, the control module 2 includes a main control MCU chip U1, where in this embodiment, the main control MCU chip U1 is shown by taking HT67F489 as an example. The main control MCU chip U1 is a control center of the backup power supply with the bidirectional quick charge function and is used for controlling the whole charge and discharge work, and the control module 2 is electrically connected with the bidirectional quick charge module 1 and the lifting pressure module 3.

As shown in fig. 3 and 4, the bidirectional fast charge module 1 includes a bidirectional charge and discharge unit 11, where the bidirectional charge and discharge unit 11 includes a fast charge protocol chip U2 and its peripheral circuit, and a socket 111, and in this embodiment, the fast charge protocol chip U2 is shown by taking an IP2716 model as an example. The socket 111 includes a first interface J1 and a second interface J2, in this embodiment, the first interface J1 adopts a Type-C interface, the second interface J2 adopts an Apple transfer interface, the socket 111 is connected with a CC1 port, a CC2 port, a DM port and a DP port of the fast charging protocol chip U2, the fast charging protocol chip U2 realizes the input and output protocols of USB Type-C and USB PD3.0 through the connection of the CC1 port and the CC2 port, the fast charging protocol chip U2 realizes the output fast charging protocols of QC3.0/2.0, MTK pe+1.1, FCP and SCP through the connection of the DM port and the DP port, that is, when an electric device or a charger accesses the socket 111, the fast charging protocol chip U2 judges a charging and discharging request of an access device or a charger through the CC1 port and the CC2 port, and the fast charging protocol chip U2 identifies a discharging request of the access device through the DM port and the DP port. The fast charging protocol chip U2 is connected with the control module 2 through an IIC communication interface thereof, the IIC communication interface comprises an IP-SCL port and an IP-SDA port, the control module 2 reads the working state of the fast charging protocol chip U2 through the IIC interface, a first MOS tube Q1 is arranged between the lifting pressure module 3 and the bidirectional charging and discharging unit 11 to control charging and discharging work, in order to prevent voltage from flowing backwards to the Type-C port, the first MOS tube Q1 is set to be PMOS, the grid electrode of the first MOS tube Q1 is connected with a CH_G port and a DCH_G port of the fast charging protocol chip U2, the drain electrode of the first MOS tube Q1 is connected with a charging and discharging detection port of the fast charging protocol chip U2, the source electrode is grounded, when equipment or a charger is connected with the socket 111, the fast charging protocol chip U2 acquires an equipment access signal through the CC1 port, the CC2 port, the DM port and the VBUS port, identifies equipment or charger information and establishes communication according to the protocol Type of the equipment, when the access is interrupted, the fast charging protocol chip U2 enables the first MOS tube Q1 to be started, the fast charging protocol chip U2 reads the equipment information, and the control module 2 reads the equipment access information after the equipment access information is started; when the access is a charger, the first MOS transistor Q1 is kept closed, and the fast charging protocol chip U2 informs the control module 2 of receiving charging information.

Meanwhile, as shown in fig. 5, the bidirectional fast charge module 1 includes a discharge unit 12, the discharge unit 12 includes a fast charge output chip U3 and its peripheral circuit, a discharge interface USB1, the discharge unit 12 includes a plurality of discharge interfaces adapted to USB type ea, and the discharge unit 12 is electrically connected to the control module 2. In the embodiment of the application, the fast charge output chip U3 is shown by taking the IP2161 model as an example. A fast charge starting circuit 4 is arranged between a fast charge output chip U3 and a control module 2, the fast charge starting circuit 4 comprises a second MOS tube Q2, a first triode P1 and a first resistor R1, the second MOS tube Q2 is set to be PMOS, the first triode P1 adopts an NPN triode, an emitter of the first triode P1 is grounded, a base of the first triode P1 is connected with an A1-EN port of a main control MCU chip U1 and receives a signal sent by the main control MCU chip U1, the first triode P1 is conducted, a grid electrode of the second MOS tube Q2 is connected between a collector of the first triode P1 and one end of the first resistor R1, a source electrode of the second MOS tube Q2 and the other end of the first resistor R1 are connected with an output voltage V0, and because the highest voltage output by the A1-EN port is only 5V, a drain of the second MOS tube Q2 is connected with a VCC port of a discharge interface USB1 and receives a signal sent by the main control MCU chip U1, and the electric equipment is connected with the output voltage regulation chip through the V1-V1 and the output port of the fast charge starting circuit after receiving the signal is connected with the main control module U1-U3, and the fast charge starting circuit is connected with the charge starting circuit has the charge starting circuit 3, and the fast charge starting circuit is connected with the charge starting circuit 3, and the charge starting circuit is connected with the charge starting circuit through the charge starting circuit. The fast charge output chip U3 integrates the FB control port, and accurately controls the output voltage by adjusting the current (minimum 2 uA/step) of the FBSOURCE/SINK, and when 9V voltage is output, the current 40uA corresponds to the FB port SOURCE; when 12V voltage is output, the corresponding FB port SOURCE current is 70uA; when 5V voltage is output, the FB port does not generate current nor SINK current. The FB port of the fast charging output chip U3 is connected with a second resistor R2, when the discharging interface USB1 is connected with equipment, the fast charging output chip U3 recognizes a fast charging protocol of the connected equipment, a current is output at the FB port, voltage drop is correspondingly formed at the second resistor R2, the control module 2 reads the voltage on the second resistor R2 through the internal ADC, namely the voltage value of the FB1 interface, the voltage value output at V0 is controlled, the second MOS tube Q2 is opened to output voltage, and meanwhile, the second MOS tube Q2 can be closed when the power supply is dormant, so that static power loss is reduced.

In the embodiment of the application, the interfaces for charging the electric equipment comprise Type-C output interfaces for outputting 5V/3A or 9V/3A or 12V/3A or 15V/3A or 20V/2.25A, and 2 USB output interfaces for outputting 5V/2.4A or 5V/2.0A, wherein when 2 or more than 2 output ports in the 3 output ports Type-C, USB-A1 and USB-A2 are simultaneously output, the 3 output ports are all reduced to 5V output.

As shown in fig. 4, the buck-boost module 3 includes a buck-boost control chip U5 and its peripheral circuits, and in this embodiment, the buck-boost control chip U5 is shown by taking the model BQ25703a as an example. A buck-boost driving circuit 5 is arranged between the buck-boost control chip U5 and the bidirectional charge-discharge unit 11, and the buck-boost driving circuit 5 comprises a third MOS tube Q3, a fourth MOS tube Q4, a fifth MOS tube Q5, a sixth MOS tube Q6, a seventh MOS tube Q7 and a first inductor L1. The fourth MOS transistor Q4, the fifth MOS transistor Q5, the sixth MOS transistor Q6 and the seventh MOS transistor Q7 adopt NMOS with high switching speed and small on resistance, so that the loss of voltage conversion is reduced, and the second MOS transistor Q2 adopts PMOS because a driving circuit is not arranged in the buck-boost control chip U5. The grid of the fourth MOS tube Q4 is connected with the HIDRV1 port of the lifting voltage control chip U5, the source electrode of the fourth MOS tube Q4 is connected between the drain electrode of the fifth MOS tube Q5 and the first inductor L1, the drain electrode of the fourth MOS tube Q4 is grounded, the grid of the fifth MOS tube Q5 is connected with the LODRV1 port of the lifting voltage control chip U5, the source electrode of the fifth MOS tube Q5 is grounded, the grid of the sixth MOS tube Q6 is connected with the HIDRV2 port of the lifting voltage control chip U5, the source electrode of the sixth MOS tube Q6 is connected between the drain electrodes of the first inductor L1 and the seventh MOS tube Q7, the grid of the seventh MOS tube Q7 is connected with the LODRV2 port of the lifting voltage control chip U5, and the source electrode of the seventh MOS tube Q7 is grounded. The third MOS transistor Q3 is a main switch, the grid electrode is connected with the BATDRV port of the buck-boost control chip U5, the source electrode is connected with the battery, the drain electrode is connected with the drain electrode of the sixth MOS transistor Q6, the third MOS transistor Q3 is closed for output when the input of the battery B+ is undervoltage, the charging is automatically started after the battery B+ is connected with a charger, and meanwhile, the third MOS transistor Q3 is closed for reducing static loss when the standby power supply is dormant; the buck-boost control chip U5 mainly controls the on-off PWM width of the fourth MOS tube Q4, the fifth MOS tube Q5, the sixth MOS tube Q6 and the seventh MOS tube Q7, charges the first inductor L1 when the fourth MOS tube Q4 and the fifth MOS tube Q5 are conducted, discharges the first inductor L1 when the sixth MOS tube Q6 and the seventh MOS tube Q7 are conducted, realizes the change from input voltage to output voltage, and the buck-boost control chip U5 has output overvoltage, undervoltage, overload and short-circuit protection, and reads the output current value and the output voltage value of an internal register of the buck-boost control chip U5 by the buck-boost control chip U5 in cooperation with the control module 2, and compares the output current value and the output voltage value with the current value and the voltage value set by a program to realize the protection.

As shown in fig. 4, the peripheral circuit of the boost-buck control chip U5 is connected to the peripheral circuit of the fast charging protocol chip U2, and can work in both directions, so that the backup power supply with the bidirectional fast charging function can be used as a power receiving device or a power supply device, when the socket 111 is connected to the electric device or the charger, the fast charging protocol chip U2 obtains an access signal, identifies information of the electric device or the charger and establishes communication according to a protocol type, the fast charging protocol chip U2 enables the first MOS transistor Q1 to be turned on, the third MOS transistor Q3 is turned on, meanwhile, the fast charging protocol chip U2 identifies information of the electric device or the charger to be accessed and initiates an interrupt to the control module 2, the master control MCU chip U1 is notified to read the information of the electric device or the charger and send an instruction to the voltage-controlled boost-buck control chip U5, when the electric device or the charger is accessed, the boost-buck control chip U5 controls the fourth MOS transistor Q4 and the fifth MOS transistor Q5 to be turned on at this time, charges the first inductor L1, charges the battery b+ with current, and the charge-discharge detection pin VBUS obtains a required voltage through the boost-buck module 3; when the power is connected to the electric equipment, the buck-boost control chip U5 sets charge-discharge voltage and current on the charge-discharge detection pin VBUS circuit according to the power connected to the electric equipment, at the moment, the buck-boost control chip U5 controls the sixth MOS transistor Q6 and the seventh MOS transistor Q7 to be conducted, the first inductor L1 is discharged, the battery B+ obtains required voltage through the buck-boost module 3, and the current is discharged to the charge-discharge detection pin VBUS load, so that charge-discharge work is completed;

as shown in fig. 6, the power display circuit 6 is a four-segment power indication circuit, and is connected to the PD0/SEG0 port, the PD1/SEG1 port, the PD2/SEG2 port, the PD3/SEG3 port, and the PD4/SEG4 port of the main control MCU chip U1, the main control MCU chip U1 calculates the charging and discharging currents to average display the power, detects the charging current during charging, if the main control MCU chip U1 is charged for one minute, increases the battery capacity charged for one minute, accumulates with the charging time, detects the discharging current during discharging, if the main control MCU chip U1 is discharged for one minute, decreases the battery capacity discharged for one minute, decreases with the discharging time, and sets 4 power display LED lamps LED1, LED2, LED3, LED4, and fast charging display LED5 in the power display circuit 6, and displays the remaining battery capacity/total battery capacity. For example, when the remaining power is >75%, the LED1, LED2, LED3, and LED4 are all on, when the remaining power is >50%, the LED2, LED3, and LED4 are on, when the remaining power is >25%, the LED3, and LED4 are on, and when the remaining power is <25%, the LED4 is on, and when the Type-c charger is a fast charger, the LED5 is on, otherwise, it is not on.

As shown in fig. 6, the battery core high-low temperature protection circuit 7 is externally connected with the thermistor R4 and connected with the PE1/COM1 port of the main control MCU chip U1, so as to prevent the battery from being damaged due to too high temperature during charging.

As shown in fig. 7, the battery protection circuit 8 includes a battery protection chip U6 and its peripheral circuits, and in this embodiment, the battery protection chip U6 is shown by taking the model S-8254AANFT-TB as an example. The peripheral circuit of battery protection chip U6 includes charging MOS pipe Q9, discharging MOS pipe Q10, and charging MOS pipe Q9 and discharging MOS pipe Q10 adopt PMOS, and charging MOS pipe Q9's grid links to each other with battery protection chip U6's COP port, and charging MOS pipe Q9's source connects battery B+, and charging MOS pipe Q9's drain electrode links to each other with discharging MOS pipe Q10's drain electrode, and discharging MOS pipe Q10's grid and source all link to each other with battery protection chip U6. A battery protection driving circuit 9 is arranged between the battery protection chip U6 and the control module 2, and the battery protection driving circuit 9 comprises an eighth MOS tube Q8, a second triode P2 and a third resistor R3. The second triode P2 adopts an NPN triode, the eighth MOS tube Q8 adopts NMOS, the grid electrode of the eighth MOS tube Q8 is connected between the collector electrode of the second triode P2 and the third resistor R3, the source electrode of the eighth MOS tube Q8 is grounded, the drain electrode of the eighth MOS tube Q8 is connected with the source electrode of the charging MOS tube Q9, the emitter electrode of the second triode P2 is grounded, the base electrode of the second triode P2 is connected with the BAT_SW port of the main control MCU chip U1 and receives a signal sent by the main control MCU chip U1, so that the second triode P2 is conducted, the eighth MOS tube Q8 is started, the battery protection chip U6 sends instructions to the charging MOS tube Q9 and the discharging MOS tube Q10, the charging MOS tube Q9 and the discharging MOS tube Q10 are cut off, the fault can trigger the overcharge protection when each battery has more than 4.25V, the charging MOS tube Q9 can be automatically disconnected, the overcharge protection can be triggered when each battery has the voltage lower than 2.5V, the automatic disconnection can be automatically conducted, and the overcharge protection can be achieved after the overcharge protection and the overcharge protection can be achieved.

The embodiment of the application provides a working principle of a backup power supply with a bidirectional quick charging function: when the socket 111 is connected to the electric equipment or the charger, the fast charging protocol chip U2 obtains an access signal through a CC1 port, a CC2 port, a DM port and a DP port of the fast charging protocol chip, identifies information of the electric equipment or the charger and establishes communication according to a protocol type, the fast charging protocol chip U2 enables the first MOS tube Q1 to be opened or closed, the third MOS tube Q3 to be opened, meanwhile, the fast charging protocol chip U2 identifies information of the electric equipment or the charger to be connected and initiates interruption to the control module 2, the main control MCU chip U1 is informed to read the information of the electric equipment or the charger and send an instruction to the buck-boost control chip U5, when the electric equipment is connected to the charger, the buck-boost control chip U5 controls the fourth MOS tube Q4 and the fifth MOS tube Q5 to be conducted at the moment, the first inductor L1 is charged, the current charges the battery B+, and the charge-discharge detection pin VBUS obtains a required voltage through the buck-boost module 3; when the power is connected to the electric equipment, the buck-boost control chip U5 sets charge-discharge voltage and current on the charge-discharge detection pin VBUS circuit according to the power connected to the electric equipment, at the moment, the buck-boost control chip U5 controls the sixth MOS transistor Q6 and the seventh MOS transistor Q7 to be conducted, the first inductor L1 is discharged, the battery B+ obtains required voltage through the buck-boost module 3, and the current is discharged to the charge-discharge detection pin VBUS load, so that charge-discharge work is completed; when the discharging interface USB1 is accessed by equipment, the fast charging output chip U3 recognizes a fast charging protocol of the accessed equipment, a current is output at the FB port, a voltage drop is correspondingly formed at the second resistor R2, the main control MCU chip U1 reads the voltage on the second resistor R2 through the internal ADC, namely the voltage value of the FB1 interface, the voltage value output at V0 is controlled, the first triode P1 is conducted, the second MOS tube Q2 is opened, and accordingly discharging work is completed.

The above examples are preferred embodiments of the present application, and are merely for convenience of explanation, not limitation, and any person having ordinary skill in the art shall make local changes or modifications by using the technical disclosure of the present application without departing from the technical features of the present application, and all the embodiments still fall within the scope of the technical features of the present application.

Claims

1. A backup power supply with a bidirectional quick charging function is characterized in that: the automatic charging and discharging device comprises a bidirectional quick charging module (1), a control module (2) and a lifting and pressing module (3), wherein the control module (2) is electrically connected with the bidirectional quick charging module (1) and the lifting and pressing module (3), the bidirectional quick charging module (1) is electrically connected with the lifting and pressing module (3), the control module (2) comprises a main control MCU chip and is used for acquiring equipment access signals, receiving and responding to the access information, and outputting control signals to control the charging and discharging operation of the whole backup power supply; the bidirectional quick charge module (1) is used for judging and identifying the information of the access equipment and the charge and discharge request, sending a signal to the control module (2), and receiving the charge and discharge signal output by the control module (2) to complete the charge and discharge work; the bidirectional quick charge module (1) comprises a bidirectional charge and discharge unit (11), the bidirectional charge and discharge unit (11) is electrically connected with the control module (2), the bidirectional charge and discharge unit (11) comprises a quick charge protocol chip and a socket (111), and the socket (111) is connected with the quick charge protocol chip and is used for inserting equipment or a charger; the fast charging protocol chip is used for identifying equipment access signals and informing the control module (2) of equipment access information, the bidirectional fast charging module (1) comprises a discharging unit (12), the discharging unit (12) comprises a fast charging output chip and a discharging interface, the discharging interface is connected with the fast charging output chip, the fast charging output chip receives voltage required by an accessed equipment charging protocol through the discharging interface and sends a request charging signal to the control module (2), the fast charging output chip regulates voltage according to the access equipment, and the control module (2) receives the request charging signal of the access equipment and reads the voltage regulation value of the fast charging output chip to control the output voltage so as to complete charging work of the access equipment.

2. The backup power supply with a bidirectional fast charging function as set forth in claim 1, wherein: a first MOS tube is arranged between the lifting pressure module (3) and the bidirectional charging and discharging unit (11), a control electrode of the first MOS tube is connected with a fast charging protocol chip, and the fast charging protocol chip controls the on or off of the first MOS tube to control charging and discharging work.

3. The backup power supply with a bidirectional fast charging function as set forth in claim 1, wherein: the control module (2) is equipped with between discharge unit (12) and fills start circuit (4) soon, fill start circuit (4) soon including second MOS pipe, first triode and first resistance soon, the control pole of second MOS pipe is connected between the collecting electrode of first triode and first resistance, first triode base is connected with main control MCU chip, by main control MCU chip control fills start circuit (4) soon and switches on or cut off.

4. The backup power supply with a bidirectional fast charging function as set forth in claim 2, wherein: the buck-boost module (3) comprises a buck-boost control chip, a buck-boost driving circuit (5) is arranged between the buck-boost control chip and the bidirectional charge-discharge unit (11), the buck-boost driving circuit (5) comprises a third MOS tube, a fourth MOS tube, a fifth MOS tube, a sixth MOS tube, a seventh MOS tube and a first inductor, the buck-boost control chip controls the third MOS tube to be conducted or cut off so as to control charge-discharge operation, the buck-boost control chip controls the on-off PWM width of the fourth MOS tube, the fifth MOS tube, the sixth MOS tube and the seventh MOS tube, the fourth MOS tube and the fifth MOS tube charge the first inductor when being conducted, and the sixth MOS tube and the seventh MOS tube discharge the first inductor when being conducted.

5. The backup power supply with a bidirectional fast charging function as set forth in claim 1, wherein: the control module (2) is electrically connected with an electric quantity display circuit (6) for displaying electric quantity.

6. The backup power supply with a bidirectional fast charging function as set forth in claim 1, wherein: the control module (2) is externally connected with a thermistor and is used for detecting the temperature of the battery cell.

7. The backup power supply with a bidirectional fast charging function as set forth in claim 1, wherein: the control module (2) is connected with a battery protection circuit (8), the battery protection circuit (8) comprises a battery protection chip, a charging MOS tube and a discharging MOS tube, and the battery protection chip controls the on or off of the charging MOS tube and the discharging MOS tube so as to cut off faults of the charging MOS tube and the discharging MOS tube.

8. The backup power supply with bi-directional fast charge as recited in claim 7, wherein: battery protection chip with be equipped with battery protection drive circuit (9) between control module (2), battery protection drive circuit (9) with battery protection circuit (8) link to each other, battery protection drive circuit (9) include eighth MOS pipe, second triode and third resistance, the control pole of eighth MOS pipe connect in the collecting electrode of second triode with between the third resistance, the base of second triode links to each other with master control MCU chip, by master control MCU chip makes battery protection drive circuit (9) switch on or cut-off control battery protection circuit (8) work.