CN205104967U - Mobile power supply - Google Patents
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- CN205104967U CN205104967U CN201520908430.3U CN201520908430U CN205104967U CN 205104967 U CN205104967 U CN 205104967U CN 201520908430 U CN201520908430 U CN 201520908430U CN 205104967 U CN205104967 U CN 205104967U
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Abstract
The utility model relates to a mobile power supply, including AC -DC converting circuit, DC -DC converting circuit, DC directly charge way, AC detection circuitry, battery protection circuit and output detection circuitry. DC -DC converting circuit's input is connected to the AC -DC converting circuit output, and directly charge way and battery charging circuit's input of DC is connected respectively to DC -DC converting circuit's output, and DC directly charges the output on way and connects USB output circuit, and the input of battery is connected to battery charging circuit's output, and the output connection USB output circuit of the input of battery discharge circuit, battery discharge circuit is connected to the battery output end. But this mobile power supply lug connection alternating current charges, and can be simultaneously charges for the inside battery of mobile power supply and external load, and inside battery and external load are charged and is accomplished the back auto -power -off, the convenience of customers use.
Description
Technical Field
The utility model relates to a power technical field, more specifically say, relate to a portable power source.
Background
At present, portable electronic devices such as mobile phones, tablet computers, wearable devices and the like are popularized, and convenience is brought to life of people. However, as the performance of electronic devices is continuously improved and the screens are larger and larger, the power consumption of the electronic devices is rapidly increased. On the premise that the current battery technology is not in breakthrough progress, in order to solve the problem of charging a mobile phone in an environment without alternating current charging, people adopt a mobile power supply capable of storing certain electric quantity as a power supply to charge electronic equipment.
Before the mobile power supply is used, a user needs to pre-charge the mobile power supply, the charging mode of the mobile power supply at present mostly adopts a direct current charging mode, namely, direct current is generated through a power adapter, and then the direct current is used for charging the mobile power supply, and the charging mode enables the user to carry the power adapter, so that inconvenience is brought to the use of the user.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a portable power source.
The utility model provides a technical scheme that its technical problem adopted is: the mobile power supply is constructed and comprises a battery charging circuit, a battery discharging circuit, a USB output circuit, a control circuit, an AC-DC conversion circuit, a DC direct charging circuit, an AC detection circuit, a battery protection circuit and an output detection circuit;
the output end of the AC-DC conversion circuit is connected with the input end of the DC-DC conversion circuit, the output end of the DC-DC conversion circuit is respectively connected with the DC direct charging circuit and the input end of the battery charging circuit, the output end of the DC direct charging circuit is connected with the USB output circuit, the output end of the battery charging circuit is connected with the input end of the battery, the output end of the battery is connected with the input end of the battery discharging circuit, the output end of the battery discharging circuit is connected with the USB output circuit, the DC-DC conversion circuit is connected with the control circuit through the AC detection circuit, the battery is connected with the control circuit through the battery protection circuit, and the USB output circuit is connected with the control circuit through the output detection circuit.
In the portable power source of the present invention, the DC-DC conversion circuit includes a control chip U1, a transformer T3, a diode D1, a diode D4, a resistor RS1, and a resistor RS2, wherein,
the output end of the AC-DC conversion circuit is connected with a T1A end of a transformer T3 and a pin 1 of a control chip U1, the transformer T3 is connected with a pin 5 and a pin 6 of the control chip U1, a pin 4 of the control chip U1 is connected with a pin 7 and a pin 8 of the control chip U1 through the resistor RS1 and the resistor RS2 which are connected in parallel, the pin 7 and the pin 8 of the control chip U1 are grounded, a T1B end of the transformer T3 is connected with the pin 1 and the pin 3 of the control chip U1, and a T1B end of the transformer T3 outputs direct current to vin1 and vin-1 through the diode D1 and the diode D4 which are connected in parallel;
preferably, the model number of the control chip U1 is YL 2388.
In the portable power source of the present invention, the DC direct charging circuit includes a resistor R13, a resistor R21, a resistor R23, a field effect transistor Q4, a control chip U2, and a control chip U3,
the pin 1 of the USB output circuit is connected with the pin 4 of the control chip U3 and the drain of the field effect transistor Q4 through the resistor R13, the source of the field effect transistor Q4 is grounded, the gate of the field effect transistor Q4 is grounded through the resistor R23, and the gate of the field effect transistor Q4 is connected with the pin 4 of the USB output circuit through the resistor R21;
when the AC-DC conversion circuit is connected with alternating current and the USB output circuit is externally connected with a load, the USB output circuit generates a high level which reaches the grid electrode of the field-effect tube Q4 after being divided by the resistor R21 and the resistor R23, so that the field-effect tube Q4 is conducted, the level of the pin 4 of the control chip U3 is pulled down instantly, the pin 3 of the control chip U3 outputs the high level to conduct the U2B of the control chip U2, the pin 4 of the USB output circuit is grounded, and the USB output circuit outputs current;
preferably, the model of the control chip U2 is AO 9926;
preferably, the model of the control chip U3 is YL 3022.
In the mobile power supply of the present invention, the battery charging circuit includes a field effect transistor Q1, a field effect transistor Q2, a field effect transistor Q3, a control chip U2, a control chip U3, and an inductor L3;
the drain electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with the output end of the DC-DC conversion circuit, the grid electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with a pin 2 of the control chip U3, the source electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with the source electrode of the field effect transistor Q2 and a pin 1 of the control chip U3, the grid electrode of the field effect transistor Q2 is connected with a pin 5 of the control chip U3, the drain electrode of the field effect transistor Q2 is connected with a pin 2A of the U2 of the control chip, a pin 6 of the control chip U3 is connected with a U2A of the U2 of the control chip, and the drain electrode of the field effect transistor Q2 is connected with the anode of the battery through the inductor L3.
In the portable power source of the present invention, the battery protection circuit includes a resistor R24, a field effect transistor Q2, a control chip U2, and a control chip U3, wherein,
the negative pole of the battery is connected with a pin 9 of the control chip U3 through the resistor R24, and when the pin 9 of the control chip U3 detects a low level transmitted through the resistor R24, the field effect transistor Q2 and the U2B of the control chip U2 stop working, and the charging current of the battery is cut off.
In the portable power source of the present invention, the battery discharging circuit includes a resistor R13, a resistor R21, a resistor R23, an inductor L3, a fet Q2, a fet Q4, a control chip U2, and a control chip U3, wherein,
pin 1 of the USB output circuit is connected to pin 4 of the control chip U3 and the drain of the fet Q4 through the resistor R13, the source of the fet Q4 is grounded, the gate of the fet Q4 is grounded through the resistor R23, the gate of the fet Q4 is connected to pin 4 of the USB output circuit through the resistor R21, pin 6 of the control chip U3 is connected to U2A of the control chip U2, pin 5 of the control chip U3 is connected to the gate of the fet Q2, the drain of the fet Q2 is connected to U2A of the control chip U2, the drain of the fet Q2 is connected to the positive electrode of the battery through the inductor L3, and U2A of the control chip U2 is connected to the positive electrode of the battery through the inductor L3;
when the AC-DC conversion circuit has no AC input and the USB output circuit is connected with an external load, the USB output circuit generates a high level which reaches the grid of the field-effect tube Q4 after being divided by the resistor R21 and the resistor R23, so that the field-effect tube Q4 is switched on, the level of the pin 4 of the control chip U3 is instantly lowered, a circuit composed of the control chip U3, the field-effect tube Q2 and the U2A of the control chip U2 is awakened, meanwhile, the pin 3 of the control chip U3 outputs the high level to switch on the U2B of the control chip U2, the pin 4 of the USB output circuit is grounded, and the USB output circuit outputs DC current.
In the portable power source of the present invention, the output detection circuit includes a resistor R14, a resistor R18, a resistor R19, a capacitor C19, a control chip U2, and a control chip U3,
pin 3 of the control chip U3 is grounded through the resistor R14 and the capacitor C19 which are connected in parallel, pin 3 of the control chip U3 is connected with U2B of the control chip U2, pin 7 of the control chip U3 is grounded through the resistor R18 and the resistor 19, and U2B of the control chip U2 is grounded through the resistor R19;
when the output current of the USB output circuit is smaller than the threshold current, the resistor R19 generates voltage reduction to be transmitted to the pin 7 of the control chip U3 through the resistor R18, the pin 3 of the control chip U3 outputs low level to turn off the U2A of the control chip U2, and the USB output circuit turns off the output current;
preferably, the threshold current ranges from 0mA to 200 mA.
In the portable power source of the present invention, the AC detection circuit includes a resistor R20, a resistor R22, and a control chip U3, wherein 2
A detection level sampling point Vin is arranged at the output end of the DC-DC conversion circuit, a pin 8 of the control chip U3 is grounded through the resistor R22, and a pin 8 of the control chip U3 is connected with the detection level sampling point Vin through the resistor R20; ,
the pin 8 of the control chip U3 detects the level of the detection level sampling point Vin through the resistor R20 and the resistor R22, and when the detection level sampling point Vin is at a high level, the detection level sampling point Vin is judged to be an AC input; and when the detection level sampling point Vin is at a low level, judging that no AC input exists.
In the mobile power supply of the present invention, the mobile power supply further includes an indicator light, and the control circuit is connected to the indicator light; when the USB output circuit is not loaded, the electric quantity indicator lamp is completely turned off; when the USB output circuit is loaded, the electric quantity indicator lamp is always on.
Preferably, the AC-DC conversion circuit is a rectifier bridge circuit.
The AAA of the utility model is implemented, which has the following beneficial effects: the utility model discloses a portable power source includes AC-DC converting circuit, DC directly fills circuit, AC detection circuitry, battery protection circuit and output detection circuitry; the output end of the AC-DC conversion circuit is connected with the input end of the DC-DC conversion circuit, the output end of the DC-DC conversion circuit is respectively connected with the input ends of the DC direct charging circuit and the battery charging circuit, the output end of the DC direct charging circuit is connected with the USB output circuit, the output end of the battery charging circuit is connected with the input end of the battery, the output end of the battery is connected with the input end of the battery discharging circuit, and the output end of the battery discharging circuit is connected with the USB output circuit. The utility model discloses a portable power source realizes power adapter and portable power source's integration, but the user lug connection alternating current charges, and can charge for external electronic equipment and portable power source internal battery simultaneously, cuts off current after external electronic equipment and portable power source internal battery are full of the electricity, can protective apparatus and saving electric energy.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of the mobile power supply of the present invention;
fig. 2 is a circuit diagram of a DC-DC conversion circuit according to a preferred embodiment of the mobile power supply of the present invention;
fig. 3 is a circuit diagram of a charging circuit according to a preferred embodiment of the present invention.
Detailed Description
As shown in fig. 1, in the preferred embodiment of the portable power source of the present invention, the portable power source comprises a battery charging circuit, a battery discharging circuit, a USB output circuit, a control circuit, an AC-DC converting circuit, a DC direct charging circuit, an AC detection circuit, a battery protection circuit, and an output detection circuit;
the output end of the AC-DC conversion circuit is connected with the input end of the DC-DC conversion circuit, the output end of the DC-DC conversion circuit is respectively connected with the input ends of the DC direct charging circuit and the battery charging circuit, the output end of the DC direct charging circuit is connected with the USB output circuit, the output end of the battery charging circuit is connected with the input end of the battery, the output end of the battery is connected with the input end of the battery discharging circuit, the output end of the battery discharging circuit is connected with the USB output circuit, the DC-DC conversion circuit is connected with the control circuit through the AC detection circuit, the battery is connected with the control circuit through the battery protection circuit, and the USB output circuit is connected with.
The following description will be made of each component of the portable power source of the present invention.
As shown in FIG. 2, the circuit of the present part realizes the conversion of alternating current to direct current and the conversion of high-voltage direct current to direct current required for charging the battery and the external electronic equipment.
In the mobile power supply of the preferred embodiment, the DC-DC conversion circuit includes a control chip U1, a transformer T3, a diode D1, a diode D4, a resistor RS1, and a resistor RS2, wherein,
the output end of the AC-DC conversion circuit is connected with a T1A end of a transformer T3 and a pin 1 of a control chip U1, the transformer T3 is connected with a pin 5 and a pin 6 of the control chip U1, a pin 4 of the control chip U1 is connected with a pin 7 and a pin 8 of the control chip U1 through a parallel resistor RS1 and a resistor RS2, the pin 7 and the pin 8 of the control chip U1 are grounded, a T1B end of the transformer T3 is connected with the pin 1 and the pin 3 of the control chip U1, and a T1B end of the transformer T3 outputs direct current to vin1 and vin-1 through a parallel diode D1 and a diode D4; preferably, the resistance of the resistor RS1 is 1 Ω, and the resistance of the resistor RS2 is 1.5 Ω.
Preferably, the voltage of the alternating current connected to the input end of the AC-DC conversion circuit ranges from 100V to 240V.
Preferably, the model of the control chip U1 is YL2388, the pin 1 of the control chip U1 is VDD, the pin 2 is COMP, the pin 3 is INV, the pin 4 is CS, the pin 5 is DATE, the pin 6 is DATE, the pin 7 is GND, and the pin 8 is GND.
The output end of the AC-DC conversion circuit is connected with a pin 1 of a control chip U1 through series resistors R3 and R4, when the AC-DC conversion circuit is connected with an alternating current point, starting voltage is provided for the control chip U1, and the output end of the AC-DC conversion circuit is connected with a T1A of a transformer T-3 through an inductor L1.
Preferably, the resistance of the resistor R3 is 510K Ω, the resistance of the resistor R4 is 510K Ω, and the inductance L1 is 100 uH. The output end of the AC-DC conversion circuit is grounded through the capacitor C1 and the capacitor C3, and the filtering effect is achieved. Preferably, the size of the capacitor C1 is 6.8uF, and the size of the capacitor C3 is 6.8 uF.
T1B of transformer T-3 is grounded through resistor R6 and resistor R7, T1B of transformer T-3 is connected with pin 3 of the control chip through resistor R6, T1B of transformer T-3 is connected with pin 1 of the control chip through diode D2, pin 1 of the control chip is grounded through capacitor C5, the resistance of resistor R6 is 22K Ω, the resistance of resistor R7 is 3.3K Ω, and capacitor C5 is 0.1 uF.
The pin 5 and the pin 6 of the control chip U1 are connected with one end of a parallel resistor R1 and a capacitor C4 through a diode D3, and the other end of the parallel resistor R1 and the capacitor C4 is connected with T1B of the transformer T-3. Preferably, the capacitor C4 is 100pF and the resistor R1 is 100K Ω.
The resistor R2 and the capacitor C2 are connected in series and then connected in parallel with the diode D1, the capacitors C6, C7, C8, C10 and the resistor R5 are connected to two ends of vin1 and vin-1 to play a role in filtering, and the diode D1 is connected with vin1 through the inductor L2. Preferably, the resistance of the resistor R2 is 100 Ω, the resistance of the resistor R5 is 1K Ω, the capacitance C2 is 1000pF, the capacitance C6 is 470uF, the capacitance C7 is 1000uF, the capacitance C8 is 470uF, and the capacitance C10 is 0.1 uF.
Preferably, the circuit is provided with a safety capacitor CY 1.
As shown in fig. 3, in the mobile power supply of the preferred embodiment, the DC direct charging circuit includes a resistor R13, a resistor R21, a resistor R23, a field effect transistor Q4, a control chip U2 and a control chip U3, and the circuit cannot realize the direct charging of the mobile power supply of the present invention to the external electronic device, wherein,
pin 1 of the USB output circuit is connected to pin 4 of the control chip U3 and the drain of the fet Q4 through a resistor R13, the source of the fet Q4 is grounded, the gate of the fet Q4 is grounded through a resistor R23, and the gate of the fet Q4 is connected to pin 4 of the USB output circuit through a resistor R21;
when the AC-DC conversion circuit is connected with alternating current and the USB output circuit is externally connected with a load, the USB output circuit generates a high level which is divided by a resistor R21 and a resistor R23 and then reaches the grid electrode of a field effect transistor Q4, so that the field effect transistor Q4 is conducted, the level of a pin 4 of a control chip U3 is instantly lowered, a pin 3 of a control chip U3 outputs the high level to conduct a U2B of a control chip U2, the pin 4 of the USB output circuit is grounded, and the USB output circuit outputs current;
preferably, the resistance of the resistor R13 is 1M Ω, the resistance of the resistor R21 is 100K Ω, and the resistance of the resistor R23 is 100K Ω. The capacitors C11 and C12 are connected with the positive pole of the battery and the ground to play a role in filtering.
The pin 15 of the control chip U3 is grounded through a capacitor C15, the pin 15 of the control chip U3 is grounded through a resistor R10, and the pin 15 of the control chip U3 is connected with the anode of the battery through a resistor R8.
Preferably, the external load is an electronic device such as a mobile phone, a tablet computer, an MP3, an MP4, a wearable device, and the like.
Preferably, the control chip U2 is AO9926, and has an N-MOS tube inside.
Preferably, the model of the control chip U3 is YL3022, pin 1 is VDD, pin 2 is CH1, pin 3 is 5_ VEN, pin 4 is AUTO _ ON, pin 5 is PWM _ P, pin 6 is PWM _ N, pin 7 is I _ SET, pin 8 is Vin, pin 9 is LED4, pin 10 is LED1, pin 11 is LED2, pin 12 is LAMP12, pin 13 is COM, pin 14 is CH _ EN, pin 15 is BATV, and pin 16 is GND.
In the portable power source of this preferred embodiment, battery charging circuit includes field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, control chip U2, control chip U3 and inductance L3, and this partial circuit realizes the charging to the inside battery of portable power source of the utility model.
Drains of the field effect tube Q1 and the field effect tube Q3 are connected with an output end of the DC-DC conversion circuit, gates of the field effect tube Q1 and the field effect tube Q3 are connected with a pin 2 of a control chip U3, sources of the field effect tube Q1 and the field effect tube Q3 are connected with a source of the field effect tube Q2 and a pin 1 of a control chip U3, a gate of the field effect tube Q2 is connected with a pin 5 of the control chip U3, a drain of the field effect tube Q2 is connected with a pin 2A of a U2 of the control chip, a U2A of the U2 of the control chip is connected with a pin 6 of the control chip U3, and a drain of the field effect tube Q2 is connected with an anode of the battery.
In the mobile power supply of the preferred embodiment, the battery protection circuit includes a resistor R24, a field effect transistor Q2, a control chip U2 and a control chip U3, and when the battery is fully charged, the circuit can turn off the charging current, protect the battery, and save the electric energy. Wherein,
the negative pole of the battery is connected with a pin 9 of the control chip U3 through a resistor R24, and when the pin 9 of the control chip U3 detects a low level transmitted through the resistor R24, the field effect transistor Q2 and the U2B of the control chip U2 stop working, and the charging current of the battery is cut off.
Preferably, the resistance of the resistor R24 is 1K Ω.
In the portable power source of the present preferred embodiment, the battery discharge circuit is used when the user needs to charge the electronic device with the internal battery of the portable power source. The battery discharge circuit comprises a resistor R13, a resistor R21, a resistor R23, an inductor L3, a field effect transistor Q2, a field effect transistor Q4, a control chip U2 and a control chip U3, wherein the inductor L3 is preferably 4.7 uH.
Pin 1 of the USB output circuit is connected to pin 4 of the control chip U3 and the drain of the fet Q4 through a resistor R13, the source of the fet Q4 is grounded, the gate of the fet Q4 is grounded through a resistor R23, the gate of the fet Q4 is connected to pin 4 of the USB output circuit through a resistor R21, pin 6 of the control chip U3 is connected to U2A of the control chip U2, pin 5 of the control chip U3 is connected to the gate of the fet Q2, the drain of the fet Q2 is connected to U2A of the control chip U2, the drain of the fet Q2 is connected to the positive electrode of the battery through an inductor L3, and U2A of the control chip U2 is connected to the positive electrode of the battery through an inductor L3;
when the AC-DC conversion circuit has no AC input and the USB output circuit is connected with an external load, the USB output circuit generates a high level which reaches the grid of the field effect transistor Q4 after being divided by the resistor R21 and the resistor R23, so that the field effect transistor Q4 is conducted, the level of the pin 4 of the control chip U3 is instantly lowered, a circuit consisting of the control chip U3, the field effect transistor Q2 and the U2A of the control chip U2 is awakened, meanwhile, the high level is output at the pin 3 of the control chip U3, so that the U2B of the control chip U2 is conducted, the pin 4 of the USB output circuit is grounded, and the USB output circuit outputs DC current.
After the electronic equipment that the user used is full of the electricity, output detection circuitry can turn off output current, and external electronic equipment is protected, practices thrift the electric energy, and concrete circuit is as follows:
in the mobile power supply of the preferred embodiment, the output detection circuit includes a resistor R14, a resistor R18, a resistor R19, a capacitor C19, a control chip U2 and a control chip U3, wherein,
pin 3 of the control chip U3 is grounded through a parallel resistor R14 and a capacitor C19, pin 3 of the control chip U3 is connected with U2B of the control chip U2, pin 7 of the control chip U3 is grounded through a resistor R18 and a resistor 19, and U2B of the control chip U2 is grounded through a resistor R19;
when the output current of the USB output circuit is smaller than the threshold current, the resistor R19 generates voltage reduction and transmits the voltage reduction to the pin 7 of the control chip U3 through the resistor R18, the low level output by the pin 3 of the control chip U3 enables the U2A of the control chip U2 to be turned off, and the USB output circuit turns off the output current;
preferably, the resistance of the resistor R14 is 10K Ω, and the resistance of the resistor R18 is 1K Ω.
Preferably, the threshold current ranges from 0mA to 200 mA. When the threshold current is 100mA and the output current of the USB output circuit is less than 100mA, the voltage drop generated across the resistor R19 is 5.5mV, at this time, the level is filtered by the resistor R18 and the capacitor C21 and then transmitted to the pin 7 of the control circuit U3, the low level output from the pin 3 of the control chip turns off the N-MOS transistor inside the U2A of the control circuit U2, the ground of the USB output circuit is cut off, and the output current is turned off.
For example, when the threshold circuit is 100mA, the mobile power supply is charging a mobile phone, the charging current gradually decreases with the gradual full charge of the mobile phone battery, and when the charging current is less than 100mA, it indicates that the mobile phone battery is substantially full charge, and at this time, the output current can be stopped, so that the mobile phone battery can be protected, and the electric energy can be saved. Of course, the threshold current may be adjusted lower to make the battery of the mobile phone more fully charged.
In the mobile power supply of the preferred embodiment, the AC detection circuit includes a resistor R20, a resistor R22, and a control chip U3, wherein,
the output end of the DC-DC conversion circuit is provided with a detection level sampling point Vin, a pin 8 of a control chip U3 is grounded through a resistor R22, and a pin 8 of a control chip U3 is connected with the detection level sampling point Vin through a resistor R20; ,
the pin 8 of the control chip U3 detects the level of the detection level sampling point Vin through the resistor R20 and the resistor R22, and when the detection level sampling point Vin is at a high level, the detection level sampling point Vin is judged to be AC input; when the detection level sampling point Vin is at a low level, it is determined that there is no AC input.
The resistance of the resistor R20 is 1K omega, and the resistance of the resistor R22 is 1K omega.
In the mobile power supply of the preferred embodiment, the mobile power supply further comprises an indicator light, and the control circuit is connected with the indicator light; when the USB output circuit is not loaded, the electric quantity indicator lamp is completely turned off; when the USB output circuit has a load, the electric quantity indicator lamp is always on.
One end of the light emitting diode LED1 is connected with a pin 11 of the control chip U3, the other end of the light emitting diode LED1 is connected with a pin 13 through a resistor R17, and the light emitting voltage is 4V; one end of the light emitting diode LED2 is connected with a pin 11 of the control chip U3, the other end of the light emitting diode LED2 is connected with a pin 13 through a resistor R17, and the light emitting voltage is 3.8V; one end of the light emitting diode LED3 is connected with a pin 10 of the control chip U3, the other end of the light emitting diode LED3 is connected with a pin 13 through a resistor R17, and the light emitting voltage is 3.6V; one end of the light emitting diode LED4 is connected to the pin 10 of the control chip U3, the other end is connected to the pin 13 through the resistor R17, and the light emitting voltage is 3V. Pin 13 of the control chip U3 is connected to ground through resistor R16.
Preferably, the resistance of the resistor R16 is 3.3K Ω.
Preferably, the AC-DC conversion circuit is a rectifier bridge circuit.
The USB output circuit is a USB standard port, the pin 1 is a positive pole, the pin 2 is a D +, the pin 3 is a D-, and the pin 4 is a GND.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (10)
1. A mobile power supply comprises a battery charging circuit (04), a battery (05), a battery discharging circuit (06), a USB output circuit (07) and a control circuit (09), and is characterized by further comprising an AC-DC conversion circuit (01), a DC-DC conversion circuit (02), a DC direct charging circuit (03), an AC detection circuit (08), a battery protection circuit (11) and an output detection circuit (12);
the output end of the AC-DC conversion circuit (01) is connected with the input end of the DC-DC conversion circuit (02), the output end of the DC-DC conversion circuit (02) is respectively connected with the input ends of the DC direct charging circuit (03) and the battery charging circuit (04), the output end of the DC direct charging circuit (03) is connected with the USB output circuit (07), the output end of the battery charging circuit (04) is connected with the input end of the battery (05), the output end of the battery (05) is connected with the input end of the battery discharging circuit (06), the output end of the battery discharging circuit (06) is connected with the USB output circuit (07), the DC-DC conversion circuit (02) is connected with the control circuit (09) through the AC detection circuit (08), and the battery (05) is connected with the control circuit (09) through the battery protection circuit (11), the USB output circuit (07) is connected with the control circuit (09) through the output detection circuit (12).
2. The mobile power supply of claim 1, wherein the DC-DC conversion circuit (02) comprises a control chip U1, a transformer T3, a diode D1, a diode D4, a resistor RS1, and a resistor RS2, wherein,
the output end of the AC-DC conversion circuit (01) is connected with a T1A end of the transformer T3 and a pin 1 of the control chip U1, the transformer T3 is connected with a pin 5 and a pin 6 of the control chip U1, a pin 4 of the control chip U1 is connected with a pin 7 and a pin 8 of the control chip U1 by connecting the resistor RS1 and the resistor RS2 in parallel, a pin 7 and a pin 8 of the control chip U1 are grounded, a T1B end of the transformer T3 is connected with a pin 1 and a pin 3 of the control chip U1, and a T1B end of the transformer T3 outputs direct current to vin1 and vin-1 by connecting the diode D1 and the diode D4 in parallel;
the model number of the control chip U1 is YL 2388.
3. The mobile power supply of claim 2, wherein the DC direct charging circuit (03) comprises a resistor R13, a resistor R21, a resistor R23, a field effect transistor Q4, a control chip U2 and a control chip U3, wherein,
the pin 1 of the USB output circuit (07) is connected with the pin 4 of the control chip U3 and the drain of the field effect transistor Q4 through the resistor R13, the source of the field effect transistor Q4 is grounded, the gate of the field effect transistor Q4 is grounded through the resistor R23, and the gate of the field effect transistor Q4 is connected with the pin 4 of the USB output circuit (07) through the resistor R21;
when the AC-DC conversion circuit (01) is connected with an alternating current and the USB output circuit (07) is externally connected with a load, a high level generated by the USB output circuit (07) is divided by the resistor R21 and the resistor R23 and then reaches the grid of the field effect transistor Q4, so that the field effect transistor Q4 is conducted, the level of the pin 4 of the control chip U3 is pulled down instantly, the pin 3 of the control chip U3 outputs a high level to conduct the U2B of the control chip U2, the pin 4 of the USB output circuit (07) is grounded, and the USB output circuit (07) outputs a current;
the model of the control chip U2 is AO 9926;
the model of the control chip U3 is YL 3022.
4. The mobile power supply of claim 2, wherein the battery charging circuit (04) comprises a field effect transistor Q1, a field effect transistor Q2, a field effect transistor Q3, a control chip U2, a control chip U3 and an inductor L3;
the drain electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with the output end of the DC-DC conversion circuit (02), the gate electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with a pin 2 of a control chip U3, the source electrodes of the field effect transistor Q1 and the field effect transistor Q3 are connected with the source electrode of the field effect transistor Q2 and a pin 1 of the control chip U3, the gate electrode of the field effect transistor Q2 is connected with a pin 5 of the control chip U3, the drain electrode of the field effect transistor Q2 is connected with a pin 2A of the U2 of the control chip, a pin 6 of the control chip U3 is connected with the U2A of the U2 of the control chip, and the drain electrode of the field effect transistor Q2 is connected with the positive electrode of the battery (05) through the inductor L3.
5. The mobile power supply of claim 4, wherein the battery protection circuit (11) comprises a resistor R24, a field effect transistor Q2, a control chip U2 and a control chip U3, wherein,
the negative pole of battery (05) passes through resistance R24 connects pin 9 of control chip U3, after pin 9 of control chip U3 detected the low level that comes through resistance R24 transmission, FET Q2 and the U2B of control chip U2 stop work, turn off the charging current of battery (05).
6. The mobile power supply of claim 1, wherein the battery discharge circuit (06) comprises a resistor R13, a resistor R21, a resistor R23, an inductor L3, a field effect transistor Q2, a field effect transistor Q4, a control chip U2 and a control chip U3, wherein,
pin 1 of the USB output circuit (07) is connected to pin 4 of the control chip U3 and the drain of the fet Q4 through the resistor R13, the source of the fet Q4 is grounded, the gate of the fet Q4 is grounded through the resistor R23, the gate of the fet Q4 is connected to pin 4 of the USB output circuit (07) through the resistor R21, pin 6 of the control chip U3 is connected to U2A of the control chip U2, pin 5 of the control chip U3 is connected to the gate of the fet Q2, the drain of the fet Q2 is connected to U2A of the control chip U2, the drain of the fet Q2 is connected to the positive electrode of the battery (05) through the inductor L3, and U2A of the control chip U2 is connected to the positive electrode of the battery (05) through the inductor L3;
when the AC-DC conversion circuit (01) is free of AC input, and the USB output circuit (07) is connected with an external load, a high level generated by the USB output circuit (07) reaches the grid of the field-effect tube Q4 after being divided by the resistor R21 and the resistor R23, so that the field-effect tube Q4 is turned on, the level of the pin 4 of the control chip U3 is instantly lowered, a circuit composed of the control chip U3, the field-effect tube Q2 and the U2A of the control chip U2 is awakened, meanwhile, a high level is output at the pin 3 of the control chip U3, so that the U2B of the control chip U2 is turned on, the pin 4 of the USB output circuit (07) is grounded, and the USB output circuit (07) outputs a DC current.
7. The mobile power supply of claim 1, wherein the output detection circuit (12) comprises a resistor R14, a resistor R18, a resistor R19, a capacitor C19, a control chip U2 and a control chip U3, wherein,
pin 3 of the control chip U3 is grounded through the resistor R14 and the capacitor C19 which are connected in parallel, pin 3 of the control chip U3 is connected with U2B of the control chip U2, pin 7 of the control chip U3 is grounded through the resistor R18 and the resistor R19, and U2B of the control chip U2 is grounded through the resistor R19;
when the output current of the USB output circuit (07) is smaller than the threshold current, the resistor R19 generates voltage reduction to be transmitted to the pin 7 of the control chip U3 through the resistor R18, the pin 3 of the control chip U3 outputs low level to turn off the U2A of the control chip U2, and the USB output circuit (07) turns off the output current;
the value range of the threshold current is 0 mA-200 mA.
8. The mobile power supply of claim 1, wherein the AC detection circuit (08) comprises a resistor R20, a resistor R22, and a control chip U3, wherein,
a detection level sampling point Vin is arranged at the output end of the DC-DC conversion circuit (02), a pin 8 of the control chip U3 is grounded through the resistor R22, and a pin 8 of the control chip U3 is connected with the detection level sampling point Vin through the resistor R20;
the pin 8 of the control chip U3 detects the level of the detection level sampling point Vin through the resistor R20 and the resistor R22, and when the detection level sampling point Vin is at a high level, the detection level sampling point Vin is judged to be an AC input; and when the detection level sampling point Vin is at a low level, judging that no AC input exists.
9. The mobile power supply according to claim 1, further comprising an indicator light (10), wherein the control circuit (09) is connected to the indicator light (10); when the USB output circuit (07) is not loaded, the electric quantity indicator lamp is completely turned off; when the USB output circuit (07) is loaded, the electric quantity indicator lamp is normally on.
10. The mobile power supply according to claim 1, wherein the AC-DC conversion circuit (01) is a rectifier bridge circuit.
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| CN201520908430.3U CN205104967U (en) | 2015-11-13 | 2015-11-13 | Mobile power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361254A (en) * | 2018-12-22 | 2019-02-19 | 东莞市壹带电源科技有限公司 | Intelligent charger and mobile power source one full of the quick charger automatically shut down |
| CN110649311A (en) * | 2019-09-04 | 2020-01-03 | 上海智汇电器有限公司 | Battery pack |
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2015
- 2015-11-13 CN CN201520908430.3U patent/CN205104967U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361254A (en) * | 2018-12-22 | 2019-02-19 | 东莞市壹带电源科技有限公司 | Intelligent charger and mobile power source one full of the quick charger automatically shut down |
| CN110649311A (en) * | 2019-09-04 | 2020-01-03 | 上海智汇电器有限公司 | Battery pack |
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Effective date of registration: 20181031 Address after: 412000 Hunan Zhuzhou Chaling County town of Huan Town neighborhood committee Patentee after: Liu Yuqin Address before: 310011 Zhongtian West City 4-308, Yuhang Road, Gongshu District, Hangzhou, Zhejiang Patentee before: Liang Yongqin |
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