CN204376473U - Portable power source - Google Patents

Abstract

A kind of portable power source, comprises master controller, storage battery and boosting charge-discharge circuit, wherein: described master controller, is suitable for sending the first control signal to described boosting charge-discharge circuit, makes described charge in batteries; And send the second control signal to described boosting charge-discharge circuit, make described storage battery export preset voltage value through described boosting charge-discharge circuit; Boosting charge-discharge circuit, couple with described master controller, comprising: PMOS, the first control end of grid and described master controller couples, and the output channel of source electrode and described portable power source couples, and drain electrode and described battery positive voltage couple; NMOS tube, the second control end of grid and described master controller couples, source electrode with ground couple, drain electrode and described battery positive voltage couple.Adopt described portable power source, can effectively save portable power source cost, reduce the circuit area of portable power source, and, adopt NMOS tube and PMOS to support high current charge-discharge, improve the flexibility of application.

Description

mobile power

technical field

The utility model relates to the field of power supplies, in particular to a mobile power supply.

Background technique

A mobile power supply is a portable charger that integrates power supply and charging functions. It can charge mobile phones, tablet computers and other devices anytime, anywhere or standby power.

The existing mobile power supply is mainly composed of a charging input circuit, a DC-DC (direct current-direct current conversion) boost switch circuit and its peripheral circuits, a central control circuit, and a USB output circuit. The output end of the charging input circuit is connected to the input end of the DC-DC boost switch circuit, the output end of the DC-DC boost switch circuit is connected to the input end of the USB output circuit, the central control circuit is connected to the DC-DC boost switch circuit and The USB output circuit is connected to control the DC-DC boost switch circuit and the USB output circuit, and the cell protection circuit is connected to the DC-DC boost switch circuit to protect the DC-DC boost switch circuit.

In the existing mobile power supply, the DC-DC boost switching circuit is usually implemented by a dedicated boost chip, and corresponding peripheral components need to be provided around the boost chip, which leads to high overall cost and large circuit area.

Utility model content

The problem solved by the embodiment of the utility model is how to save the cost of the mobile power supply and reduce the circuit area of the mobile power supply.

In order to solve the above problems, the embodiment of the utility model provides a mobile power supply, including: a main controller, a storage battery, and a boost charging and discharging circuit, wherein:

The main controller is adapted to send a first control signal to the boost charging and discharging circuit when detecting that there is a voltage input at the charging port of the mobile power supply, so that the storage battery is charged and discharged through the boost charging and discharging circuit. Charging; and, when it is detected that there is a load at the output port of the mobile power supply, sending a second control signal to the boost charging and discharging circuit, so that the battery outputs a preset voltage value through the boost charging and discharging circuit;

The boost charging and discharging circuit, coupled with the main controller, includes:

PMOS transistor, the grid is coupled to the first control terminal of the main controller, the source is coupled to the output channel of the mobile power supply, and the drain is coupled to the positive pole of the battery, suitable for receiving the main controller The first control signal sent by the controller is turned on, so that the storage battery is charged;

NMOS transistor, the gate is coupled to the second control terminal of the main controller, the source is coupled to the ground, and the drain is coupled to the positive pole of the storage battery, which is suitable for receiving the second control terminal sent by the main controller. When the control signal is turned on, the storage battery is discharged at a preset voltage value.

Optionally, the boost charging and discharging circuit further includes: a first switch resistor connected in series between the first control terminal of the main controller and the gate of the PMOS transistor; a second switch resistor connected in series between the second control terminal of the main controller and the gate of the NMOS transistor.

Optionally, the boost charging and discharging circuit further includes: a first inductor connected in series between the drain of the PMOS transistor and the positive electrode of the storage battery; a first filter capacitor whose first terminal is connected to the first inductor coupled, and the second terminal is coupled to ground.

Optionally, the boost charge and discharge circuit further includes: a first discharge resistor, a first terminal coupled to the gate of the PMOS transistor, and a second terminal coupled to the output channel of the mobile power supply; a second discharge resistor The first end of the resistor is coupled to the gate of the NMOS transistor, and the second end is coupled to the source of the NMOS transistor.

Optionally, the mobile power supply further includes: a charging insertion detection circuit, arranged at the charging port of the mobile power supply, coupled with the charging insertion detection terminal of the main controller, adapted to detect that the mobile power supply When there is a voltage input to the charging port of the charging port, a high level signal is sent to the charging insertion detection terminal of the main controller, so that the main controller sends a first control signal to the boost charging and discharging circuit.

Optionally, the charging insertion detection circuit includes: a first voltage dividing resistor, the first end of which is coupled to the VBUS end of the charging port, and the second end is coupled to the charging insertion detection end of the main controller; Two voltage-dividing resistors, the first end of which is coupled to the GND end of the charging port, and the second end is coupled to the charging detection end of the main controller.

Optionally, the mobile power supply further includes: a boost feedback circuit, coupled to the charging insertion detection circuit, and coupled to the charging and discharging voltage detection terminal of the main controller, adapted to obtain the charging port voltage in real time. input voltage and sent to the main controller.

Optionally, the boost feedback circuit includes: a third voltage dividing resistor, a first terminal coupled to the VBUS terminal of the charging port, a second terminal coupled to the voltage detection terminal; a fourth voltage dividing resistor , the first terminal is coupled to the voltage detection terminal, and the second terminal is coupled to the control ground terminal of the main controller.

Optionally, the mobile power supply further includes: a battery voltage detection circuit, coupled to the positive pole of the storage battery, and coupled to the battery voltage detection terminal of the main controller, adapted to obtain the current voltage value of the storage battery in real time , and send the current voltage value of the storage battery to the main controller.

Optionally, the battery voltage detection circuit includes: a fifth voltage dividing resistor, a sixth voltage dividing resistor, a first filter resistor and a second filter capacitor, the first terminal of the fifth voltage dividing resistor is connected to the Positively coupled, the second end is coupled to the first end of the first filter resistor and the first end of the sixth voltage dividing resistor, the first end of the first filter resistor is connected to the second filter capacitor The first terminal of the second filter capacitor and the second terminal of the sixth voltage dividing resistor are both coupled to the control ground terminal of the main controller.

Optionally, the mobile power supply further includes: a load access detection circuit, coupled to the GND terminal of the output port of the mobile power supply, and coupled to the load access detection terminal of the main controller, suitable for When it is detected that there is a load on the output port, a low level signal is sent to the main controller, so that the main controller sends a second control signal to the boost charging and discharging circuit.

Optionally, the load access detection circuit includes: a first drive resistor, a second drive resistor and a first NPN transistor, the first end of the first drive resistor is coupled to the GND end of the output port of the mobile power supply connected, the second end is coupled to the base of the first NPN transistor; the first end of the second drive resistor is coupled to the base of the first NPN transistor, and the second end is coupled to ground; The collector of the first NPN transistor is coupled to the load access detection terminal, and the emitter is coupled to the ground.

Optionally, the mobile power supply further includes: a discharge enable circuit, coupled to the GND terminal of the output port of the mobile power supply, and coupled to the enable terminal of the main controller, suitable for receiving the The enable signal sent by the controller is turned on, so that the storage battery supplies power to the load.

Optionally, the discharge enabling circuit includes: a field effect transistor, the drain is coupled to the GND end of the output port, the source is coupled to the ground, and the gate is coupled to the first end of the third discharge resistor; The second end of the third discharge resistor is coupled to the ground.

Optionally, the mobile power supply further includes: a load current detection circuit, coupled to the discharge enabling circuit, and coupled to the load current detection terminal of the main controller, adapted to obtain the current current of the mobile power supply discharge current.

Optionally, the load current detection circuit includes: a sampling resistor, a second filter resistor and a third filter capacitor, the first end of the sampling resistor and the first end of the second filter resistor and the field effect transistor The source of the third filter capacitor is coupled to the ground, and the second end is coupled to the ground; the second end of the second filter resistor is coupled to the load current detection end; the first end of the third filter capacitor is connected to the load current detection end terminal, and the second terminal is coupled to ground.

Optionally, the mobile power supply further includes: a charging protection circuit, coupled to the charging current detection terminal of the main controller, adapted to provide charging protection for the mobile power supply.

Optionally, the mobile power supply further includes: a battery power display circuit, coupled to the preset LED control terminal in the main controller, adapted to display the corresponding battery power value according to the current voltage value of the storage battery.

Optionally, the battery power display circuit includes: at least two LEDs, and the LEDs are respectively coupled to preset LED control terminals in the corresponding main controller.

Optionally, the mobile power supply further includes: a lighting circuit, a first terminal coupled to a preset lighting control terminal of the main controller, and a second terminal coupled to the positive pole of the battery.

Optionally, the lighting circuit includes: a first base resistor, a first terminal coupled to the lighting control terminal, and a second terminal coupled to the base of the second NPN transistor;

the second NPN transistor, the emitter is coupled to the ground, and the collector is coupled to the first end of the first current limiting resistor;

For the LED lamp, the first terminal is coupled to the positive pole of the battery, and the second terminal is coupled to the second terminal of the first current limiting resistor.

Compared with the prior art, the technical solution of the utility model embodiment has the following advantages:

The boost charging and discharging circuit is composed of PMOS tube and NMOS tube, and the charging and discharging of the battery is controlled by controlling the boost charging and discharging circuit through the controller, without using a dedicated boost charging chip, which saves both the cost and the boost charge. The connection components around the voltage charging chip reduce the area of the circuit, and the use of NMOS tubes and PMOS tubes can support high-current charging and discharging, improving application flexibility.

Further, the charging insertion detection circuit is coupled to the charging insertion detection terminal of the main controller, the boost feedback circuit is coupled to the voltage detection terminal of the main controller, and the battery voltage detection circuit is coupled to the battery voltage detection terminal of the main controller. Connect the load access detection circuit to the load access detection terminal of the main controller, couple the discharge enable circuit to the enable terminal of the main controller, and connect the load current detection circuit to the load current detection terminal of the main controller. Terminal coupling, the charging protection circuit is coupled with the charging current detection terminal of the main controller, and the various functional circuits of the mobile power supply are coupled with the main controller, making full use of each input and output port of the main controller. Compared with the existing The mobile power supply can maximize the utilization of the main controller.

Description of drawings

Fig. 1 is the circuit diagram of a kind of boost charging and discharging circuit in the utility model embodiment;

Fig. 2 is a circuit diagram of a charging insertion detection circuit, a boost feedback circuit and a battery voltage detection circuit in an embodiment of the present invention;

Fig. 3 is a pin distribution diagram of a main controller in the embodiment of the present invention;

Fig. 4 is a circuit diagram of a discharge enabling circuit, a load current detection circuit, and a load access detection circuit in an embodiment of the utility model;

Fig. 5 is a circuit diagram of a discharge protection circuit in an embodiment of the utility model;

Fig. 6 is a circuit diagram of a battery power display, fast charge control and flashlight circuit in an embodiment of the present invention;

Fig. 7 is a flow chart of a mobile power system control method in an embodiment of the present invention.

Detailed ways

In the existing mobile power supply, the DC-DC boost switching circuit is usually implemented by a dedicated boost chip, and corresponding peripheral components need to be provided around the boost chip, which leads to high overall cost and large circuit area.

In the embodiment of the utility model, the boost charge and discharge circuit is composed of PMOS tube and NMOS tube, and the boost charge and discharge circuit is controlled by the main controller to control the charge and discharge of the storage battery without using a dedicated boost charge chip , while saving the cost, it also saves the peripheral connecting elements of the boost charging chip and reduces the area of the circuit.

In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and understandable, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The embodiment of the utility model provides a mobile power supply, including: a main controller, a storage battery, and a boost charging and discharging circuit, wherein:

The main controller may include at least two control terminals. When it is detected that there is a voltage input at the charging port of the mobile power supply, that is, when there is a power supply of the peripheral device to charge the mobile power supply, the main controller generates a first control signal and passes the second control signal. A control terminal sends a first control signal to the boost charging and discharging circuit. The boost charging and discharging circuit receives the first control signal and performs corresponding operations, so that the storage battery coupled with the boost charging and discharging circuit enters the charging mode, and the external power supply starts to charge the storage battery of the mobile power supply.

In an embodiment of the present invention, a charging insertion detection circuit may be provided at the charging port of the mobile power supply. When it is detected that the charging port has an external voltage input, and the input external voltage is greater than a certain value for a period longer than the preset value, it can be determined that an external power supply is connected to the charging port of the mobile power supply, and the mobile power supply can enter the charging mode. The charging insertion detection circuit sends a feedback signal to the charging insertion detection terminal of the main controller, for example, sends a high-level signal to the charging insertion detection terminal of the main controller, so that the main controller knows that there is currently a peripheral power supply connected to the mobile power supply, And send the first control signal to the boost charging and discharging circuit, so as to charge the storage battery.

For example, in an embodiment of the present invention, the charging port of the mobile power supply is a USB charging port. A charging insertion detection circuit is provided at the USB charging port. When the charging insertion detection circuit detects that the voltage of the USB charging port is 5V for longer than 1s, it can be determined that there is currently a power supply of the peripheral device coupled to the mobile power supply. The charging insertion detection circuit sends a high level signal to the charging insertion detection terminal of the main controller. After receiving the high-level signal sent by the charging insertion detection circuit, the main controller sends a first control signal to the boost charging and discharging circuit, so as to charge the storage battery coupled with the boost charging and discharging circuit.

When it is detected that there is a load on the output port of the mobile power supply, that is, when there is a load circuit connected to the output port of the mobile power supply at the current moment, the main controller generates a second control signal and sends it to the boost charging and discharging circuit through the second control terminal Second control signal. The boost charging and discharging circuit performs corresponding operations according to the second control signal, so that the storage battery outputs a voltage of a preset voltage value.

In the embodiment of the utility model, a load access detection circuit can be set at the output port of the mobile power supply. When it is detected that a load circuit is connected to the output port, a feedback signal can be sent to the load access detection terminal of the main controller, for example, a low-level signal is sent to the load access detection terminal of the main controller, so that the main controller knows There is currently a load circuit connected to the mobile power supply. The main controller sends a second control signal to the boost charging and discharging circuit, so that the storage battery outputs a voltage of a preset voltage value.

In the embodiment of the present invention, the boost charging and discharging circuit may include two MOS transistors, one of which is a NOMS transistor and the other is a PMOS transistor. The two MOS transistors can be integrated on one chip, for example, on a chip with dual field effect transistors, or they can be two independent MOS transistors.

The gate of the PMOS transistor is coupled to the first control terminal of the main controller, and receives the first control signal output by the main controller through the first control terminal; the source is coupled to the output path of the mobile power supply; the drain is connected to the positive pole of the battery coupling. The PMOS transistor is turned on when receiving the first control signal sent by the main controller.

The gate of the NMOS transistor is coupled to the second control terminal of the main controller to receive the second control signal output by the main controller through the second control terminal; the source is coupled to the ground; the drain is coupled to the positive pole of the storage battery. The NMOS transistor is turned on when receiving the second control signal sent by the main controller.

In an embodiment of the utility model, referring to Fig. 1, a boost charging and discharging circuit in the embodiment of the utility model is given, and referring to Fig. 2, a main control circuit in an embodiment of the utility model is given The pinout diagram of the device. With reference to FIG. 1 and FIG. 2 , the boost charging and discharging circuit in the embodiment of the utility model will be described below.

In Figure 1, the PMOS transistor and the NMOS transistor are integrated on a dual MOS transistor chip Q1, where pin 1 of Q1 is the source of the NMOS transistor, pin 2 is the gate of the NOMS transistor, and pin 3 is the gate of the PMOS transistor. Source, pin 4 is the gate of the PMOS tube, pins 5 and 6 are the drains of the PMOS tube, and pins 7 and 8 are the drains of the NMOS tube.

The gate of the PMOS transistor is coupled to the first control terminal (PWMP, refer to pin 8 in Figure 2) of the main controller, and the gate of the NMOS transistor is coupled to the second control terminal (PWMN, refer to Figure 2 Pin 9) is coupled. The first control signal generated by the main controller is a first PWM wave, the second control signal is a second PWM wave, and the first PWM wave and the second PWM wave are complementary and symmetrical. the

When it is detected that there is a voltage input from the charging port of the mobile power supply, that is, when there is a power supply of the peripheral device charging the mobile power supply, the main controller is woken up, generates the first PWM wave, and sends it to the PMOS tube through the first control terminal PWMP. The gate of the PMOS transistor is turned on after receiving the first PWM wave. Since the drain of the PMOS tube is coupled to the positive pole of the battery, a loop is formed between the PMOS tube and the battery, and the battery starts to charge.

When it is detected that there is a load circuit connected to the output port of the mobile power supply, that is, when the load circuit of the peripheral device is connected to the mobile power supply, the main controller is woken up, generates a second PWM wave, and sends a signal to the NMOS through the second control terminal PWMN tube sent. The gate of the NMOS transistor is turned on after receiving the second PWM wave. Since the drain of the NMOS tube is coupled to the positive pole of the battery, a loop is formed between the NMOS tube and the battery, and the battery is discharged at a preset voltage.

In an embodiment of the present invention, a first inductor L1 and a first filter capacitor C01 are arranged between the battery and the drain of the PMOS tube, the first end of the first inductor L1 is coupled to the positive pole B+ of the battery, and the first terminal of the first inductor L1 is coupled to the positive pole B+ of the battery. The two terminals are coupled to the drain of the PMOS transistor. A first end of the first filter capacitor C01 is coupled to the positive pole of the battery, and a second end is coupled to the ground. The inductance value of the first inductor L1 may be 4.7 μH, and the capacitance value of the first filter capacitor C01 may be 22 μF. In practical applications, the inductance value of the first inductor L1 is related to the frequency of the PWM wave output by the main controller and the main frequency of the main controller. For different main controllers, the inductance value of the first inductor L1 may be different.

When the main controller sends the first PWM wave to the PMOS tube to control the conduction of the PMOS tube through the first control terminal, or sends the second PWM wave to the NOMS tube to control the conduction of the NMOS tube through the second control terminal, the rapid switching of the MOS tube It may cause the noise edge of the PWM wave to be steeper and cause greater radiation.

Therefore, in an embodiment of the present invention, the boost charging and discharging circuit may further include a first switch resistor R11 and a second switch resistor R12, both of which function to delay the MOS The switching speed of the tube, wherein: the function of the first switching resistor R11 is to delay the switching speed of the PMOS tube, and the role of the second switching resistor R12 is to delay the switching speed of the NMOS tube. By slowing down the switching speed of the NMOS transistor and the PMOS transistor, the radiation enhancement caused by the excessively fast switching speed of the NMOS transistor and the PMOS transistor can be avoided.

The first end of the first switch resistor R11 is coupled to the gate of the PMOS transistor, and the second end is coupled to the first control terminal PWMP (see pin 8 in FIG. 2 ) of the main controller, that is, the first switch resistor R11 It is connected in series between the PMOS transistor and the first control terminal PWMP of the main controller. The first end of the second switch resistor R12 is coupled to the gate of the NMOS transistor, and the second end is coupled to the second control terminal PWMN (see pin 9 in FIG. 2 ) of the main controller, that is, the second switch resistor R12 It is connected in series between the NMOS transistor and the second control terminal PWMN of the main control.

In an embodiment of the present invention, both the first switch resistor R11 and the second switch resistor R12 are chip resistors, and the resistance values of the first switch resistor R11 and the second switch resistor R12 are equal to 4.7 ohms. In other embodiments of the present invention, the first switch resistor R11 and the second switch resistor R12 can also be other types of resistors, and the resistance values can also be other values, which are not limited here, and the corresponding types can be selected according to actual needs The switch resistance and the corresponding resistance value.

In one embodiment of the present invention, a first discharge resistor R21 is provided between the gate of the PMOS tube and the output path (5VOut) of the mobile power supply, through the first discharge resistor R21, a loop is formed between the PMOS tube and the battery , to ensure reliable disconnection of the PMOS tube. A second discharge resistor R22 is arranged between the gate and the source of the NMOS tube, through the second discharge resistor R22, a loop is formed between the NMOS tube and the storage battery to ensure reliable disconnection of the NMOS tube. In an embodiment of the present invention, the resistance of the first discharge resistor R21 may be 10k ohms, and the resistance of the second discharge resistor R22 may be 10k ohms.

In an embodiment of the present invention, a shunt diode D1 can also be provided on the output path of the mobile power supply. The anode of the shunt diode D1 is coupled to the positive pole B+ of the battery, and the cathode is coupled to the output path (5VOut) of the mobile power supply.

In an embodiment of the present invention, referring to FIG. 3 , a charging insertion detection circuit in the embodiment of the present invention is shown. USB1 is the micro-USB charging port of the mobile power supply, including VBUS, D+, D-, ID and GND. The GND is connected to the ground, and the ID is empty. The charging insertion detection circuit is set at the USB1 of the mobile power supply. When the charging insertion detection circuit detects that there is a voltage connection at the VBUS terminal, and the duration of the voltage value is greater than a certain value is longer than the preset value, it is determined that there is a peripheral power supply connected to the mobile power supply. Power charging port.

Referring to FIG. 2 and FIG. 3 , the charging insertion detection circuit includes a first voltage dividing resistor R31 and a second voltage dividing resistor R32 . The first terminal of the first voltage dividing resistor R31 is coupled to the VBUS terminal of USB1, and the second terminal is coupled to the charge insertion detection terminal (Charge Vin, see pin 14 in FIG. 2 ) of the main controller. The first terminal of the second voltage dividing resistor R32 is coupled to the charging insertion detection terminal Charge Vin, and the second terminal is coupled to the ground. The resistance value of the first voltage dividing resistor R31 may be 2k ohms, and the resistance value of the second voltage dividing resistor R32 may be 10k ohms.

For example, when it is detected that a voltage of 5V is connected to the VBUS terminal, it is determined that a peripheral power supply is currently connected to the charging port of the mobile power supply. At this time, there is a voltage drop between the first terminal and the second terminal of the first voltage dividing resistor R31, so that the level of the charging insertion detection terminal (Charge Vin) of the main controller changes from a low level to a high level, thereby Wake up the main controller. The main controller configures the mobile power supply to be in charging mode, and sends the first PWM wave to the PMOS tube in the boost charging and discharging circuit through the first control terminal PWMP (see pin 8 in Figure 2), and controls the PMOS tube to conduct, so that the mobile power supply The battery in the battery is charged.

In an embodiment of the present invention, the charging insertion detection circuit may be coupled with the boost feedback circuit, and feed back the charging voltage input to the mobile power supply to the main controller through the boost feedback circuit. A voltage dividing diode D2 may be provided between the charge insertion detection circuit and the boost feedback circuit.

In an embodiment of the present invention, the boost feedback circuit includes a third voltage dividing resistor R33 and a fourth voltage dividing resistor R34, the first end of the third voltage dividing resistor R33 is coupled to the VBUS end of USB1, and the second end is coupled to the VBUS end of USB1. The charging and discharging voltage detection terminal (Vol5V, refer to pin 13 in FIG. 2 ) of the main controller is coupled. The first terminal of the fourth voltage dividing resistor R34 is coupled to the charge and discharge voltage detection terminal (Vol5V) of the main controller, and the second terminal is coupled to the ground. The charge and discharge voltage detection terminal (Vol5V) of the main controller detects and obtains the first The voltage on the four-divider resistor R34. The resistance value of the third voltage dividing resistor R33 may be 180k ohms, and the resistance value of the fourth voltage dividing resistor R34 may be 100k ohms.

In an embodiment of the present invention, the second terminal of the fourth voltage dividing resistor R34 can also be coupled to the control ground terminal (CtlGND, see pin 11 in FIG. 2 ) of the main controller, which can reduce power consumption.

In the embodiment of the utility model, the boost feedback circuit can also be coupled with the output path (5VOut) of the mobile power supply, which is suitable for the main controller to monitor the discharge voltage of the battery through the charge and discharge voltage detection terminal (Vol5V) when the battery is discharging. Perform real-time detection.

In the embodiment of the present invention, the mobile power supply can also include a battery voltage detection circuit, which is coupled to the battery voltage detection terminal (BTV, see pin 12 in FIG. 2 ) of the main controller, and is suitable for real-time acquisition The current voltage value of the storage battery, and send the current voltage value of the storage battery to the battery voltage detection terminal (BTV) of the main controller, so that the main controller can know the current voltage value of the storage battery.

In the embodiment of the present invention, referring to Fig. 2 and Fig. 3, the battery voltage detection circuit may include: a fifth voltage dividing resistor R35, the first end of the fifth voltage dividing resistor R35 is coupled to the positive pole B+ of the storage battery; Piezoresistor R36, the first end is coupled to the second end of the fifth voltage dividing resistor R35, and the second end is coupled to the ground; the first end of the first filter resistor R41 is coupled to the second end of the fifth voltage dividing resistor R35 The second terminal is coupled to the battery voltage detection terminal (BTV) of the main controller; the first terminal of the second filter capacitor C02 is coupled to the second terminal of the first filter resistor R41, and the second terminal is coupled to the ground. The first filter resistor R41 and the second filter capacitor C02 form an RC filter circuit, which filters the current voltage signal of the battery and sends it to the battery voltage detection terminal (BTV) of the main controller.

The fifth voltage dividing resistor R35 has a resistance of 180k ohms, the sixth voltage dividing resistor R36 has a resistance of 100k ohms, the first filter resistor R41 has a resistance of 1k ohms, and the second filter capacitor C02 has a capacitance of 104 μF.

In an embodiment of the present invention, the second end of the second filter capacitor C02 and the second end of the sixth voltage dividing resistor R36 may be coupled to the control ground (CtlGND) of the main controller.

In the embodiment of the present invention, the fifth voltage dividing resistor R35 , the sixth voltage dividing resistor R36 , the third voltage dividing resistor R33 and the fourth voltage dividing resistor R34 can all be precision resistors with an accuracy of less than 1%.

In an embodiment of the present invention, a load access detection circuit may be provided at the output port of the mobile power supply, which is suitable for detecting whether a load is connected to the mobile power supply. When a load is connected to the mobile power supply, the mobile power supply charges the load circuit through the output port.

In the embodiment of the utility model, the output port of the mobile power supply is a USB output port. The first end of the load access detection circuit is coupled to the GND end of the USB output port, and the second end is coupled to the load access detection end (PinHalt, refer to pin 14 in FIG. 2 ) of the main controller. When a load is connected, the load connection detection circuit sends a feedback signal to the main controller, for example, sends a low level signal, so that the main controller knows that there is currently a load connected. The main controller generates the second PWM wave, and sends the second PWM wave to the NMOS tube in the boost charging and discharging circuit through the second control terminal PWMN, so that the NMOS tube is turned on, because the drain of the NMOS tube is coupled to the positive pole of the battery , so the battery can be discharged to output a preset voltage value.

With reference to Fig. 4, in one embodiment of the present utility model, the output port of mobile power supply includes USB2 and USB3, and USB2 and USB3 all comprise VBUS end, D+ end, D- end and GND end, and VBUS end is connected with the output path of mobile power supply (5VOut) coupling. It can be understood that, in other embodiments of the present invention, the output port of the mobile power supply may only include USB2, or may include more USB interfaces.

The load access detection circuit includes a first driving resistor R51, a second driving resistor R52 and a first NPN transistor Q3. Wherein, the collector of the first NPN transistor Q3 is coupled to the load access detection terminal (PinHalt) of the main controller, and the emitter is coupled to the ground; the first terminal of the first driving resistor R51 is coupled to the GND terminal of the output interface , the second end is coupled to the base of the first NPN transistor Q3; the first end of the second drive resistor R52 is coupled to the base of the first NPN transistor Q3, and the second end is coupled to the emitter of the first NPN transistor Q3 catch. The resistance value of the first driving resistor R51 may be 4.7k ohms, and the resistance value of the second driving resistor R52 may be 10k ohms.

In this utility model embodiment, the working principle of the load access detection circuit can be described as follows: when the output interface USB2 or USB3 is connected to the load, the battery makes the first NPN transistor Q3 conduct through the internal resistance of the battery, and the first NPN transistor Q3 on the main controller The level of the load access detection terminal (PinHalt) changes from high level to low level, so that the main controller knows that there is currently a load connected to the output interface. The main controller generates a second control signal, that is, a second PWM wave, and sends the second PWM wave to the NMOS transistor of the boost charging and discharging circuit through the PWMN pin, so that the NMOS transistor is turned on, thereby realizing the discharge of the storage battery.

In the embodiment of the present invention, a discharge enable circuit can also be set in the mobile power supply, and when the main controller sends the second control signal to the NMOS tube of the boost charge and discharge circuit, the enable terminal (BoostEN, Referring to pin 3) in FIG. 2, an enable signal is sent to turn on the discharge enable circuit, thereby generating a discharge loop. The first end of the discharge enable circuit is coupled to the GND end of the output port, and the second end is coupled to the enable end of the main controller. When the main controller detects that the level of the load access detection terminal has changed from high level to low level, it sends an enable switch signal through the enable terminal, so that the discharge enable circuit is turned on, and a discharge circuit is generated.

Referring to FIG. 4 , in an embodiment of the present invention, the discharge enabling circuit is composed of a field effect transistor Q2 and a third discharge resistor R23 , and the field effect transistor is a dual MOS transistor chip Q2 . The drain of the dual MOS tube chip Q2 is coupled to the GND terminal of the output port of the mobile power supply, and the gate is coupled to the enable terminal (BoostEN) of the main controller. Pass. The first end of the third discharge resistor R23 is coupled to the gate of the dual MOS transistor chip Q2, and the second end is coupled to the ground.

In the embodiment of the present utility model, a load current detection circuit may also be provided, coupled with the discharge enable circuit, suitable for obtaining the current input to the load by the mobile power supply, that is, the current discharge current of the mobile power supply.

In an embodiment of the present invention, referring to FIG. 4 , the load current detection circuit includes: a sampling resistor R60 , a second filter resistor R42 and a third filter capacitor C03 . Wherein: the first end of the sampling resistor R60 is coupled to the first end of the second filter resistor R42 and the source of the dual MOS transistor chip Q2, and the second end is coupled to the ground. The first end of the second filter resistor R42 is coupled to the source of the dual MOS tube chip Q2, and the second end is coupled to the load current detection end (Load Current, refer to pin 15 in FIG. 2 ) of the main controller. The first terminal of the third filter capacitor C03 is coupled to the load current detection terminal (Load Current), and the second terminal is coupled to the ground.

The resistance value of the sampling resistor R60 may be 0.05 ohm, the resistance value of the second filter resistor R42 may be 1k ohm, and the capacitance value of the third filter capacitor C03 may be 104 μF.

With reference to FIGS. 1-4 , the working process of the mobile power supply provided in the above-mentioned embodiments of the present invention will be described in detail below.

When the mobile power supply is charging, when the charging insertion detection circuit detects that there is a 5V voltage input on USB1, the charging insertion detection terminal (Charge Vin) of the main controller changes from low level to high level. The main controller detects the voltage change of the charging insertion detection terminal (Charge Vin), generates the first PWM wave, and sends it to the gate of the PMOS transistor of the boost charging and discharging circuit through the first control terminal (PWMP). The PMOS tube is turned on after receiving the first PWM wave, and forms a loop with the battery to charge the battery.

When the mobile power supply is discharging, when the load is connected to USB2 or USB3, the internal resistance of the battery changes, so that the first NPN transistor of the load access detection circuit is turned on, and the load access detection terminal (PinHalt) of the main controller is changed from High level transitions to low level. When the main controller detects the level change of the load access detection circuit (PinHalt), it generates a second PWM wave and sends it to the NMOS transistor of the boost charging and discharging circuit through the second control terminal (PWMN). The NMOS tube is turned on when receiving the second PWM wave, and forms a loop with the storage battery, so that the storage battery is discharged.

Specifically, when the main controller detects that the level of the load access detection terminal (PinHalt) has changed, it generates an enabling switch signal and sends it to the discharge enabling circuit through the enabling terminal (BoostEN). The discharge enable circuit is turned on after receiving the enable switch signal, thereby forming a discharge loop.

During the discharge process, the main controller detects the output current at the output port in real time through the load current detection terminal (Load Current), detects the current voltage of the battery in real time through the battery voltage detection terminal (BTV), and detects the current voltage of the battery through the charge and discharge voltage detection terminal (Vol5V) Real-time detection of battery discharge voltage.

In the embodiment of the present utility model, the mobile power supply may further include a battery protection circuit. Referring to Fig. 5, in one embodiment of the present invention, the battery protection circuit is coupled to the charge current detection terminal (Charge Current, refer to pin 10 in Fig. 2) of the main controller, including: a third filter resistor R43 and a first Four filter capacitors C04; fourth filter resistor R44 and fifth filter capacitor C05; lithium battery protection chip U2 and two dual-channel MOS transistors U3 and U4.

Wherein, the first terminal of the fourth filter capacitor C04 is coupled to the charging current detection terminal (Charge Current), and the second terminal is coupled to the ground. The first terminal of the third filter resistor R43 is coupled to the charging current detection terminal (ChargeCurrent), the second terminal is coupled to the negative pole B- of the storage battery, and the fourth filter capacitor C04 and the third filter resistor R43 form a low-pass filter, which is The signal input by the charging detection terminal is filtered. The resistance value of the third filter resistor R43 is 1k ohms, and the capacitance value of the fourth filter capacitor C04 is 104 μF.

The first end of the fourth filter resistor R44 is coupled to the positive pole B+ of the battery, and the second end is coupled to the pin 5 of the lithium battery protection chip U2. The first end of the fifth filter capacitor C05 is coupled to the second end of the fourth filter resistor R44, the second end is coupled to the negative pole B- of the storage battery, and the pin 5 of the lithium battery protection chip U2 is the VCC end. The resistance value of the fourth filter resistor R44 is 100 ohms, and the capacitance value of the fifth filter capacitor C05 is 104 μF.

The model of the lithium battery protection chip U2 adopted in an embodiment of the present invention is DW01, which has 6 pins, wherein, pin 1 is a discharge and over-discharge control pin, pin 2 is a charging detection pin, and pin 3 is a Overcharge control pin, pin 4 is the test pin, pin 5 is VCC, pin 6 is GND, pin 2 is coupled to the ground through the resistor R21, and pin 6 is coupled to the negative pole B- of the battery. The pins 1 and 3 of the dual-channel MOS transistor U3 are the sources of the MOS transistors, the pins 2 and 5 are the drains of the MOS transistors, the pins 4 and 6 are the gates of the MOS transistors, and the pins of the dual-channel MOS transistor U4 are The distribution can refer to the dual-channel MOS transistor U3, which will not be described here.

Pin 1 of the lithium battery protection chip U2 is coupled to pin 6 of the dual-channel MOS transistors U3 and U4, and pin 3 is coupled to pin 4 of the dual-channel MOS transistors U3 and U4. Both the pin 3 of the dual-channel MOS transistors U3 and U4 are coupled to the ground, the pin 1 is coupled to the negative pole B- of the battery, and the pin 2 is coupled to the corresponding pin 5 .

In an embodiment of the present invention, the mobile power supply may further include a power display circuit suitable for displaying battery power, including at least two LEDs. 3 and 6, an embodiment of the present invention provides a power display circuit 601, including four LED lights: L1, L2, L3 and L4. L1 is in parallel with L2 and is coupled to the LED1 pin of the main controller (see pin 2 in Figure 2), L3 is in parallel with L4 and is coupled to the LED2 pin of the main controller (see pin 6 in Figure 2) Then, the main controller outputs control signals through pins 2, 6, and 7 to control the lighting or extinguishing of L1, L2, L3, and L4. The pins 2, 6, and 7 of the main controller are all PWM wave output terminals, and the LEDs are controlled to be on or off by outputting PWM waves.

The battery power display circuit can be multiplexed with the mobile power switch circuit. Referring to FIG. 6, S1 is the switch button for power inquiry. The first terminal of S1 is coupled to the first terminal of the pull-down resistor R70, and the second terminal is coupled to the second terminal of the current limiting resistor R80. The second terminal of the pull-down resistor R70 is coupled to the ground, and the first terminal of the current limiting resistor R80 is connected in parallel with L4. The resistance value of the current limiting resistor R80 is 100 ohms, and the resistance value of the pull-down resistor R70 is 1k ohms.

In this utility model embodiment, the mobile power supply can also include a flashlight circuit 603, and the flashlight circuit 603 is coupled with the Light pin (refer to pin 5 in FIG. Circuit 603 sends a control signal. The flashlight circuit 603 may include a first base resistor R91, a second NPN transistor Q4, a first current limiting resistor R81 and L5. Wherein, the first terminal of the first base resistor R91 is coupled to the Light pin of the main controller, and the second terminal is coupled to the base of the NPN transistor Q4. The emitter of the NPN transistor Q4 is coupled to the ground, and the collector is coupled to the first terminal of the first current limiting resistor R81. The second terminal of the first current limiting resistor R81 is coupled to the first terminal of L5, and the second terminal of L5 is coupled to the positive pole B+ of the storage battery. The resistance value of the first current limiting resistor R81 is 100 ohms. The resistance of the first base resistor R91 is 4.7k ohms.

Referring to FIG. 6 , in an embodiment of the present invention, the mobile power supply further includes a fast charge control circuit 602 , and the fast charge control circuit 602 is coupled to the enable terminal (BoostEN) of the main controller. The fast charging circuit 602 includes: a second base resistor R92 with a first terminal coupled to the enable terminal of the main controller, and a second terminal of the second base resistor R92 coupled to the base of the NPN transistor Q5. The emitter of the NPN transistor Q5 is coupled to the ground, and the collector is coupled to the resistor network.

The resistor network is composed of resistors R101, R102, R103, and R104, wherein the first end of the resistor R101 is coupled to the output port of the mobile power supply, and the second end is coupled to the D-terminal of the output port of the mobile power supply; the first end of the resistor R103 One end is coupled to the D- terminal of the output port of the mobile power supply, and the second end is coupled to the collector of the NPN transistor Q5; the first end of the resistor R102 is coupled to the output port of the mobile power supply, and the second end is coupled to the output port of the mobile power supply. The D+ end of the output port is coupled; the first end of the resistor R104 is coupled to the D+ end of the output port of the mobile power supply, and the second end is coupled to the collector of the NPN transistor Q5.

The resistance value of the resistor R92 is 4.7k ohms, the resistance value of the resistor R101 is 29.4k ohms, the resistance value of the resistor R102 is 75k ohms, the resistance value of the resistor R103 is 34.8k ohms, and the resistance value of the resistor R104 is 49.9k ohms.

It can be seen that the charging insertion detection circuit is coupled with the charging insertion detection terminal of the main controller, the boost feedback circuit is coupled with the voltage detection terminal of the main controller, and the battery voltage detection circuit is connected with the battery voltage detection terminal of the main controller. Connect the load access detection circuit to the load access detection end of the main controller, couple the discharge enable circuit to the enable end of the main controller, and connect the load current detection circuit to the load of the main controller The current detection terminal is coupled, the charging protection circuit is coupled with the charging current detection terminal of the main controller, the various functional circuits of the mobile power supply are coupled with the main controller, and the input and output ports of the main controller are fully utilized. The existing mobile power supply can maximize the utilization of the main controller.

Regarding the mobile power supply provided by the above-mentioned embodiments of the present utility model, the embodiment of the present utility model also provides a control method of the mobile power supply system.

According to the response time requirements of each program in the mobile power software control system, the programs in the main system are divided into a first response program, a second response program, a third response program and a fourth response program. Among them, the first response program has the highest requirement on response time, the second response program has the second requirement on response time, and the fourth response program has the lowest requirement on response time.

Among them, the first response program performs detection in real time, the response time corresponding to the second response program is 250 μs, the response time corresponding to the third response program is 5 ms, and the response time corresponding to the fourth response program is 125 ms. The response time of the first response program, the second response program, the third response program and the fourth response program may also be other values, which will not be repeated here.

In the embodiment of the present invention, the first response program may include a voltage overcharge processing program, which is used to prevent the voltage overcharge caused by the sudden pull-out of the load when the load of the mobile power supply is large, and it needs to be carried out in real time. detection to avoid damage to the mobile power supply.

The second response program may include: a display driver subroutine, a voltage sampling subroutine, a current sampling subroutine, and a load insertion subroutine, wherein the corresponding response time of each program is 250 μs.

The display driver subroutine is mainly used to dynamically scan the LEDs and buttons of the mobile power supply. The scanning interval is generally set to be short, because a long scanning interval will cause serious LED flickering. Generally, the scanning interval can be 1ms.

The voltage sampling subroutine is mainly used to sample the voltage value of the battery and the output voltage value of the battery. The sampling period can also be set to 1ms. After 16 consecutive samples, the average value is taken as the voltage value of the battery and the output voltage value of the battery.

The current sampling subroutine is mainly used to use the charging current value of the battery and the discharge current value of the load. The sampling period can also be set to 1ms. After 16 consecutive samples, the average value is taken as the charging current value of the battery and the discharge current value of the load.

The load insertion detection subroutine is mainly used to automatically detect the insertion of the mobile power load. When the load is detected, the main controller is woken up, and then the main controller controls the conduction of the boost charging current to realize the charging of the load circuit. The period can also be set to 1ms.

In the embodiment of the present utility model, the third response program may include: a state detection subroutine, a charge management subroutine, a load detection subroutine, and a boost control subroutine, wherein the corresponding response time of each program is 5ms.

The state detection subroutine is mainly used to detect the insertion of the charger, and when the insertion of the charger is detected, the main controller is controlled to charge the mobile power supply.

The charging management subroutine is mainly used to control the magnitude of the charging current according to the voltage of the battery, and trickle charge the battery when the voltage value of the battery is less than the first preset value; when the voltage value of the battery is between the first preset value and When the value is between the second preset values, the battery is charged with a constant current; when the voltage value of the battery is greater than the second preset value, the battery is charged with a constant voltage, and the first preset value is smaller than the second preset value.

For example, the first preset value is 3V, and the second preset value is 4.1V. Then, when the voltage value of the battery is less than 3V, the battery is trickle charged; when the voltage value of the battery is between 3V and 4.1V, the battery is charged with a constant current; when the voltage value of the battery is greater than 4.1V, the battery is charged with a constant voltage Charge.

The load detection subroutine is mainly used to judge whether there is a light load or overcurrent phenomenon according to the magnitude of the load current, and take corresponding protection operations. The boost control subroutine is mainly used to adjust the duty cycle of the first PWM wave or the second PWM wave according to the output voltage or output current of the output port of the mobile power supply, so as to keep the output voltage of the output port of the mobile power supply at 5V.

In the embodiment of the present utility model, the fourth response program may include: a charging protection subroutine, a state processing subroutine, a display data processing subroutine, and a sleep power balance processing subroutine, wherein the corresponding response time of each program is 125ms . in:

The charging protection subroutine is mainly used to protect the battery in the mobile power supply from overcharging; the state processing main program is mainly used to judge the current power state of the battery; the display processing subroutine is mainly used to change the displayed data according to different working states; The subroutine for dormant power balance processing is mainly used to realize low power consumption and power balance of the product.

Referring to Fig. 7, a flow chart of a mobile power system control method in the embodiment of the present invention is given.

Step S701, system initialization.

Step S702, judging whether the discharge flag of the current mobile power supply is 1.

In an embodiment of the present invention, the discharge flag bit of the mobile power supply is 1, indicating that the mobile power supply is currently in a discharging state. When the current mobile power supply is in the discharging state, execute step S703; when the current discharge flag of the mobile power supply is 0, execute step S705.

Step S703, judging whether there is voltage overcharging of the mobile power supply.

In an embodiment of the present invention, when there is voltage overcharging in the mobile power supply, step S704 is executed; when there is no voltage overcharging, step S705 is executed.

Step S704, process the voltage overcharge through the voltage overcharge processing program.

Step S705, judging whether the response time of the mobile power source reaches 250 μs.

In an embodiment of the present invention, when the response time of the mobile power source reaches 250 μs, step S706 is executed; when the response time of the mobile power source does not reach 250 μs, step S702 is re-executed.

Step S706, execute the second response program.

In an embodiment of the present invention, step S707 is executed after the execution of the second response program is completed.

Step S707, judging whether the response time of the mobile power source reaches 5ms.

In an embodiment of the present invention, when the response time of the mobile power source reaches 5 ms, step S708 is executed; when the response time of the mobile power source is less than 5 ms, step S702 is re-executed.

Step S708, execute the third response program.

In an embodiment of the present invention, after the execution of the third response program is completed, step S709 is executed.

Step S709, judging whether the response time of the mobile power source reaches 125ms.

In an embodiment of the present invention, when the response time of the mobile power source reaches 125 ms, step S710 is executed; when the response time of the mobile power source is less than 125 ms, step S702 is re-executed.

Step S710, execute the fourth response procedure.

In an embodiment of the present utility model, after the execution of the fourth response program is completed, step S702 is re-executed, so that a loop operation can be realized.

In the embodiment of the present invention, corresponding to the second response program, the third response program and the fourth response program, the execution of the second response program is taken as an example for description.

In step S706, execute the second response procedure. The second response program includes: a display driver subroutine, a voltage sampling subroutine, a current sampling subroutine and a load insertion subroutine. When executing the second response program, the display driving subroutine, the voltage sampling subroutine, the current sampling subroutine, and the load insertion subroutine may be executed sequentially.

In the embodiment of the present invention, after the execution of the display driving subroutine is completed, step S707 can be executed directly to determine whether the response time of the mobile power supply reaches 5 ms or the voltage sampling subroutine can be continued. That is to say, when executing the second response program, every time one of the subroutines is executed, step S707 can be directly executed, and when the response time of the mobile power source reaches 5 ms, step S708 can be directly executed without continuing to execute The second responds to the rest of the subroutines in the program, thereby reducing the time taken for program execution.

It can be understood that, in the embodiment of the present invention, when executing the third response program, reference may be made to the above-mentioned operation when executing the second program, which will not be repeated here.

Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: ROM, RAM, disk or CD, etc.

Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model, so the protection scope of the present utility model should be based on the scope defined by the claims.

Claims (21)

1. a portable power source, is characterized in that, comprising: master controller, storage battery and boosting charge-discharge circuit, wherein:

Described master controller, is suitable for, when detecting that the charging port of described portable power source exists voltage input, sending the first control signal, described storage battery is charged through described boosting charge-discharge circuit to described boosting charge-discharge circuit; And, when detecting that the output port of described portable power source exists load, sending the second control signal to described boosting charge-discharge circuit, making described storage battery export preset voltage value through described boosting charge-discharge circuit;

Boosting charge-discharge circuit, couples with described master controller, comprising:

PMOS, first control end of grid and described master controller couples, and the output channel of source electrode and described portable power source couples, and drain electrode and described battery positive voltage couple, being suitable for the conducting when receiving the first control signal that described master controller sends, making described charge in batteries;

NMOS tube, second control end of grid and described master controller couples, source electrode with ground couple, drain electrode and described battery positive voltage couple, being suitable for the conducting when receiving the second control signal that described master controller sends, making described storage battery with the magnitude of voltage preset electric discharge.

2. portable power source as claimed in claim 1, it is characterized in that, described boosting charge-discharge circuit also comprises:

First switch resistance, is connected between the first control end of described master controller and the grid of described PMOS;

Second switch resistance, is connected between the second control end of described master controller and the grid of described NMOS tube.

3. portable power source as claimed in claim 2, it is characterized in that, described boosting charge-discharge circuit also comprises:

First inductance, is connected between the drain electrode of described PMOS and the positive pole of described storage battery;

First filter capacitor, first end and described first inductance couple, the second end with couple.

4. portable power source as claimed in claim 3, it is characterized in that, described boosting charge-discharge circuit also comprises:

First discharge resistance, the grid of first end and described PMOS couples, and the output channel of the second end and described portable power source couples;

Second discharge resistance, the grid of first end and described NMOS tube couples, and the source electrode of the second end and described NMOS tube couples.

5. portable power source as claimed in claim 1, it is characterized in that, also comprise: charging insertion detection circuit, be arranged on the charging port place of described portable power source, insert test side with the charging of described master controller to couple, be suitable for when detecting that the charging port of described portable power source exists voltage input, the charging to described master controller is inserted test side and is sent high level signal, makes described master controller send the first control signal to described boosting charge-discharge circuit.

6. portable power source as claimed in claim 5, it is characterized in that, described charging insertion detection circuit comprises:

First divider resistance, the VBUS of first end and described charging port holds and couples, and the charging of the second end and described master controller is inserted test side and coupled;

Second divider resistance, the GND of first end and described charging port holds and couples, and the charging test side of the second end and described master controller couples.

7. portable power source as claimed in claim 5, it is characterized in that, also comprise: boost feedback circuit, couple with described charging insertion detection circuit, and couple with the charging/discharging voltage test side of described master controller, be suitable for the voltage of charging port input described in Real-time Obtaining, and be sent to described master controller.

8. portable power source as claimed in claim 7, it is characterized in that, described boost feedback circuit comprises:

3rd divider resistance, the VBUS of first end and described charging port holds and couples, and the second end and described voltage detecting end couple;

4th divider resistance, first end and described voltage detecting end couple, and the control ground of the second end and described master controller is held and coupled.

9. portable power source as claimed in claim 1, it is characterized in that, also comprise: battery voltage detection circuit, couple with described battery positive voltage, and couple with the battery voltage detection end of described master controller, be suitable for the current voltage value of storage battery described in Real-time Obtaining, and the current voltage value of described storage battery is sent to described master controller.

10. portable power source as claimed in claim 9, it is characterized in that, described battery voltage detection circuit comprises: the 5th divider resistance, 6th divider resistance, first filter resistance and the second filter capacitor, the described first end of the 5th divider resistance and the positive pole of described storage battery couple, the first end of the second end and described first filter resistance and the first end of described 6th divider resistance couple, the first end of described first filter resistance and the first end of described second filter capacitor and described battery voltage detection end couple, second end of described second filter capacitor and the second end of described 6th divider resistance are all held with the control ground of described master controller and are coupled.

11. portable power sources as claimed in claim 1, it is characterized in that, also comprise: load detection circuit for access, hold with the GND of the output port of described portable power source and couple, and access test side with the load of described master controller and couple, being suitable for when detecting that described output port exists load, sending low level signal to described master controller, making described master controller send the second control signal to described boosting charge-discharge circuit.

12. portable power sources as claimed in claim 11, it is characterized in that, described load detection circuit for access comprises: first drives resistance, second to drive resistance and the first NPN transistor, described first drives the GND of the first end of resistance and the output port of described portable power source to hold couples, and the base stage of the second end and described first NPN transistor couples; Described second drives the first end of resistance and the base stage of described first NPN transistor to couple, the second end and couple; The collector electrode of described first NPN transistor and described load access test side and couple, emitter with couple.

13. portable power sources as claimed in claim 11, it is characterized in that, also comprise: electric discharge enable circuits, hold with the GND of the output port of described portable power source and couple, and couple with the Enable Pin of described master controller, being suitable for the conducting when receiving the enable signal that described controller sends, making described storage battery be described load supplying.

14. portable power sources as claimed in claim 13, it is characterized in that, described electric discharge enable circuits comprises:

Field effect transistor, drain electrode and the GND of described output port holds and couple, source electrode and couple, the first end of grid and the 3rd discharge resistance couples;

3rd discharge resistance, the second end with couple.

15. portable power sources as claimed in claim 14, it is characterized in that, described portable power source also comprises: load current detection circuit, couples with described electric discharge enable circuits, and couple with the load current detection end of described master controller, be suitable for obtaining the current discharging current of described portable power source.

16. portable power sources as claimed in claim 15, it is characterized in that, described load current detection circuit comprises: sampling resistor, the second filter resistance and the 3rd filter capacitor, the first end of described sampling resistor and the first end of described second filter resistance and the source electrode of described field effect transistor couple, the second end with couple; Second end and the described load current detection end of described second filter resistance couple; First end and the described load current detection end of described 3rd filter capacitor couple, the second end with couple.

17. portable power sources as claimed in claim 1, is characterized in that, also comprise: charge protector, couple with the charging current test side of described master controller, are suitable for providing charge protection to described portable power source.

18. portable power sources as claimed in claim 1, is characterized in that, also comprise: battery power display circuit, couple, be suitable for the current voltage value according to described storage battery with the LED control end preset in described master controller, the battery electric quantity value that display is corresponding.

19. portable power sources as claimed in claim 18, it is characterized in that, described battery power display circuit comprises: at least two LED, and described LED couples with the LED control end preset in corresponding master controller respectively.

20. portable power sources as claimed in claim 1, is characterized in that, also comprise: lighting circuit, and the Lighting control end that first end and described master controller are preset couples, and the positive pole of the second end and described storage battery couples.

21. portable power sources as claimed in claim 20, it is characterized in that, described lighting circuit comprises: the first base resistance, and first end and described Lighting control end couple, and the base stage of the second end and the second NPN transistor couples;

Second NPN transistor, emitter with couple, the first end of collector electrode and the first current-limiting resistance couples;

LED, first end and anode couple, and the second end and described first current-limiting resistance second end couple.