CN201150007Y

CN201150007Y - Mobile power supply

Info

Publication number: CN201150007Y
Application number: CNU2008200032892U
Authority: CN
Inventors: 何志雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-26
Filing date: 2008-01-26
Publication date: 2008-11-12
Anticipated expiration: 2018-01-26

Abstract

The utility model discloses a movable power supply, which comprises a battery and a standard voltage boosting circuit composed of a QX2301 type DC/DC direct current voltage boosting IC chip, an L1 inducer, a D1 diode and a C2 capacitor which are connected. Sequence circuits are connected in parallel at both ends of the battery, a detecting circuit for monitoring the voltage at both ends of the L1 inducer in real time is connected between the sequence circuit and the boost circuit. Whether the battery voltage is sufficient and a state that an electric appliance for the external load is connected exists or not are detected through the detecting circuit arranged for the battery and the standard voltage boosting circuit and through the voltage detected on the inducer to ensure that the electric potential of the EN enable terminal of the IC is changed and further the working state of the IC chip is controlled. When the battery electricity is weak or the battery has no load to the electric appliance, the detecting Q1 of the movable power supply is not conducted, the IC circuit is shut down, the voltage boosting output is stopped to avoid the damage for the over discharge of the battery, and the phenomenon of false output can be also stopped.

Description

A kind of portable power source

Technical field

The utility model relates to the compact power of internal battery, particularly a little less than the battery electricity or external load stop a kind of portable power source when unloaded to electric.

Background technology

Present individual mobile electronic product is more and more, but the charging of these Portable, personal mobile electronic products (as mobile phone) often is subject to use occasion, as the place of electronic product not being charged on the road, directly cause electronic product not work, to the user bring in the use inconvenience and be conspicuous; Therefore the portable power source that individual mobile electronic product is powered arises at the historic moment; But mostly there is following defective in design in these portable power sources: 1. can't stop the over-discharge can phenomenon to battery, cause battery to damage because of over-discharge can; 2. there is " dummy output " phenomenon, causing a little less than the battery can not be normally to electric, in fact load does not work (as the charging to mobile phone, be exactly that handset displays is in charged state, but because a little less than the battery electricity, the voltage of output can only allow handset identity to external power supply is arranged, but the electric current to cell-phone charging is very little very little, a lot of mobile phones can't be discerned, and misidentification is to charge normal, and the result is that mobile phone fills and more do not have); 3. after power supply finished, when not connecing load, charging circuit was still worked, the consuming cells electric energy.

The utility model content

For solving the existing problem of above-mentioned portable power source, the utility model be intended to propose a kind of a little less than the battery electricity or external load stop a kind of portable power source when unloaded to electric.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of portable power source, contain battery and be that DC/DC DC boosting IC chip, L1 inductance, D1 diode and the C2 electric capacity of QX2301 connects to form the standard booster circuit by model, it is characterized in that: be parallel with sequence circuit at battery two outputs, between sequence circuit and booster circuit, be connected with the testing circuit of real-time monitoring L1 inductance both end voltage.

Sequence circuit of the present utility model is connected to form by K1 switch, C1 electric capacity and the series connection of R2 resistance; Testing circuit is the switching circuit that Q1 triode, R1, R3 resistance connect to form; Between the tie point of sequence circuit C1 and R2 and battery cathode, can be parallel with relay indicating light circuit by LED light-emitting diode and the series connection of R4 resistance.

When the rechargeable battery that the utility model uses is two joints, Q1 emitter-base bandgap grading in the testing circuit is connected the input of L1 and the EN pin of IC respectively with collector electrode, be connected in parallel on the two ends of L1 after R1 and the R3 series connection, the points of common connection of R1 and R3 is connected with the base stage of Q1, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected with the collector electrode of Q1 in the sequence circuit; The EN end of Q1 collector electrode and IC is connected, and the GND end of IC and OUT hold in parallel with C2 electric capacity two ends and as power output end.When the rechargeable battery that uses is a joint, can relay indicating light circuit and R3 divider resistance be got rid of of the present utility model, its syndeton is: the Q1 emitter-base bandgap grading in the testing circuit is connected the input of L1 and the EN pin of IC respectively with collector electrode, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected the GND end of IC and OUT holds in parallel with C2 electric capacity two ends and as power output end, using under the batteries situation does not need the relay indicating light circuit in the sequence circuit with the collector electrode of Q1.

The beneficial effects of the utility model are: by at battery and standard booster circuit testing circuit being set, by detecting the voltage on the inductance, detect cell voltage whether sufficient with the state whether external load of connection electrical appliance is arranged, make the EN Enable Pin potential change of IC and then the operating state of control IC chip, when a little less than the battery electricity or not to the electrical appliance load, not conducting of detection Q1 of the present utility model, the IC circuit is closed, output stops to boost, avoid battery discharge excessively to damage, moreover also can stop " dummy output " phenomenon.

Description of drawings

Fig. 1 is the utility model embodiment one circuit diagram;

Fig. 2 is the utility model embodiment two circuit diagrams;

Among the figure: 1. battery; 2. booster circuit; 3. sequence circuit; 4. testing circuit; 5. relay indicating light circuit.

Embodiment

Below in conjunction with accompanying drawing and each embodiment the utility model is further specified.

Embodiment one (being example) to use two batteries

A kind of portable power source as shown in Figure 1, standard booster circuit 2 is that DC/DC DC boosting IC chip, L1 inductance, D1 diode and the C2 electric capacity of QX2301 connects to form by model, be parallel with the sequence circuit 3 that connects to form by K1 switch, C1 electric capacity and the series connection of R2 resistance at 1 liang of output of battery, be parallel with relay indicating light circuit 5 in the sequence circuit 3 between the tie point of C1 and R2 and battery 1 negative pole by LED light-emitting diode and the series connection of R4 resistance; The testing circuit 4 that is connected with real-time monitoring L1 inductance both end voltage at

sequence circuit

3 and 2 of booster circuits is switching circuits that Q1 triode, R1, R3 resistance connect to form; Q1 emitter-base bandgap grading in the testing circuit 4 is connected the input of L1 and the EN pin of IC respectively with collector electrode, is connected in parallel on the two ends of L1 after R1 and the R3 series connection, and the points of common connection of R1 and R3 is connected with the base stage of Q1, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected with the collector electrode of Q1 in the sequence circuit 3; The EN end of Q1 collector electrode and IC is connected, and the GND end of IC and OUT hold in parallel with C2 electric capacity two ends and as power output end.The concrete operation principle of the utility model relates to two processes, one is the utility model to the weak testing process of battery 1 electricity: earlier power output end and load are coupled together, press the K1 switch, R2 in the sequence circuit 3 charges to C1, and the EN pin of IC chip promptly detects high voltage, and IC starts working, voltage on the L1 is by the Q1 conducting, the LED relay indicating light is bright, the IC continuous firing, and out-put supply is given load.When battery 1 brownout, by R1 and R3 dividing potential drop, cause the Q1 can't conducting, the time of not conducting surpasses the time of R2 to the C1 charging, the EN pin is 0 current potential, the LED relay indicating light extinguishes, and IC quits work, and stops output, can not cross low and produce the phenomenon of " dummy output " because of battery 1 electric weight, be actually can not give the power supply of load electrical appliance, and avoid battery 1 over-discharge can and damage, prolong its useful life; Its two for the utility model to exporting unloaded testing process: earlier power output end and load are coupled together, press the K1 switch, R2 in the sequence circuit 3 charges to C1, and the EN pin of IC chip promptly detects high voltage, and IC starts working, voltage on the L1 is by the Q1 conducting, the LED relay indicating light is bright, the IC continuous firing, and out-put supply is given load, when load disconnection or load stop automatically, electric energy on the C2 is not by load discharge, and C2 voltage does not descend, and temporary transient shut-down of IC made state, not conducting of Q1, the time of not conducting surpasses the time of R2 to the C1 charging, causes the EN pin 0 current potential to occur, and the LED relay indicating light extinguishes, IC quits work fully, and output stops; Promptly after the utility model finishes electric, auto shut off circuit work, saves energy.

Embodiment two (being example) to use a batteries 1

A kind of portable power source as shown in Figure 2, R3 divider resistance in relay indicating light circuit 5, the testing circuit 4 in the foregoing description one is all got rid of, use single battery 1, circuit structure is that the Q1 emitter-base bandgap grading in the testing circuit 4 is connected the input of L1 and the EN pin of IC respectively with collector electrode, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected with the collector electrode of Q1 in the sequence circuit 3; The GND end of IC and OUT hold in parallel with C2 electric capacity two ends and as power output end, other circuit structure and operation principle are with embodiment one.

Claims

1. portable power source, contain battery and be that DC/DC DC boosting IC chip, L1 inductance, D1 diode and the C2 electric capacity of QX2301 connects to form the standard booster circuit by model, it is characterized in that: be parallel with sequence circuit at battery two outputs, between sequence circuit and booster circuit, be connected with the testing circuit of real-time monitoring L1 inductance both end voltage.

2. a kind of portable power source according to claim 1 is characterized in that: described sequence circuit is connected to form by K1 switch, C1 electric capacity and the series connection of R2 resistance; Testing circuit is the switching circuit that Q1 triode, R1, R3 resistance connect to form.

3. a kind of portable power source according to claim 2 is characterized in that: described at sequence circuit C1 and R2 tie point and battery cathode between can be parallel with relay indicating light circuit by LED light-emitting diode and the series connection of R4 resistance.

4. according to claim 1,2 or 3 described a kind of portable power sources, it is characterized in that: the Q1 emitter-base bandgap grading in the testing circuit is connected the input of L1 and the EN pin of IC respectively with collector electrode, be connected in parallel on the two ends of L1 after R1 and the R3 series connection, the points of common connection of R1 and R3 is connected with the base stage of Q1, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected with the collector electrode of Q1 in the sequence circuit; The EN end of Q1 collector electrode and IC is connected, and the GND end of IC and OUT hold in parallel with C2 electric capacity two ends and as power output end.

5. according to claim 1,2 or 3 described a kind of portable power sources, it is characterized in that: the Q1 emitter-base bandgap grading in the testing circuit is connected the input of L1 and the EN pin of IC respectively with collector electrode, and the R1 two ends are connected the base stage of Q1 and the LX end of IC; The tie point of C1 and R2 is connected with the collector electrode of Q1 in the sequence circuit; The GND of IC end and OUT hold in parallel with C2 electric capacity two ends and as power output end.