CN204719212U - Battery electric quantity detects indicating circuit - Google Patents

Battery electric quantity detects indicating circuit Download PDF

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Publication number
CN204719212U
CN204719212U CN201520422841.1U CN201520422841U CN204719212U CN 204719212 U CN204719212 U CN 204719212U CN 201520422841 U CN201520422841 U CN 201520422841U CN 204719212 U CN204719212 U CN 204719212U
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China
Prior art keywords
circuit
npn triode
oscillatory
electric quantity
bleeder
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CN201520422841.1U
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Chinese (zh)
Inventor
徐照明
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Qingdao Goertek Co Ltd
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Qingdao Goertek Co Ltd
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Abstract

The utility model discloses a kind of battery electric quantity and detect indicating circuit, comprise bleeder circuit, on-off circuit and oscillatory circuit, the input end of described oscillatory circuit is connected with power supply by described on-off circuit, the output terminal of described oscillatory circuit is connected with power supply by a light emitting diode, the input end of described bleeder circuit is connected with the voltage output end of battery to be detected, the voltage sample output terminal of described bleeder circuit is connected with the control end of on-off circuit, and the on off operating mode of described on-off circuit accepts the control of described bleeder circuit output voltage sampled signal.Battery electric quantity of the present utility model detects indicating circuit, by adopting the combination of bleeder circuit, on-off circuit and oscillatory circuit, being controlled the break-make of oscillatory circuit and power supply by on-off circuit, controlling the illuminating state of light emitting diode, flicker instruction state of charge.Circuit structure adopts basic electronic devices and components to build and can realize, and greatly can reduce circuit cost, improves product competitiveness.

Description

Battery electric quantity detects indicating circuit
Technical field
The utility model relates to battery electric quantity detection field, especially relates to a kind of battery electric quantity and detects indicating circuit.
Background technology
In current portable electronic products design, for correct pilot cell real time electrical quantity, each product can be designed with battery power detection circuit, common battery power detection circuit application is employing two electric resistance partial pressures, the analog input mouth of partial pressure value access MCU carries out AD conversion to obtain the voltage electricity of battery, such detection mode needs to use MCU, and cost is higher, and the competitiveness of product in market is low.
Summary of the invention
The utility model adopts to solve existing battery power detection circuit the problem that chip detection cost is high, proposes a kind of battery electric quantity and detects indicating circuit, only build circuit with basic electronic component, reduce circuit cost.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of battery electric quantity detects indicating circuit, comprise bleeder circuit, on-off circuit and oscillatory circuit, the input end of described oscillatory circuit is connected with described power supply by described on-off circuit, the output terminal of described oscillatory circuit is connected with described power supply by a light emitting diode, the input end of described bleeder circuit is connected with the voltage output end of battery to be detected, the voltage sample output terminal of described bleeder circuit is connected with the control end of on-off circuit, and the on off operating mode of described on-off circuit accepts the control of described bleeder circuit output voltage sampled signal.
Further, described oscillatory circuit comprises the first electric capacity, second electric capacity, one NPN triode, 2nd NPN triode, the collector of a described NPN triode, the base stage of a described NPN triode, the collector of described 2nd NPN triode, be connected with described power supply by described on-off circuit after the base stage of described 2nd NPN triode connects a resistance respectively, the collector of a described NPN triode is connected with the base stage of described 2nd NPN triode by the first electric capacity, the base stage of a described NPN triode is connected with the collector of described 2nd NPN triode by the second electric capacity, the emitter of a described NPN triode is connected with ground end respectively with the emitter of described 2nd NPN triode.
Further, described on-off circuit comprises PNP triode, and the emitter of described PNP triode is connected with described power supply, and collector is connected with the input end of oscillatory circuit, and base stage is control end, is connected with the voltage sample output terminal of described bleeder circuit.
Further, described bleeder circuit comprises the series circuit be made up of the first resistance and the second resistance, described series circuit one end is connected with the voltage output end of battery to be detected, one end is held with ground and is connected in addition, and the voltage sample output terminal of described bleeder circuit is connected between described first resistance and the second resistance.
Further, a current-limiting resistance is in series with between the output terminal of described oscillatory circuit and described light emitting diode.
Compared with prior art, advantage of the present utility model and good effect are: battery electric quantity of the present utility model detects indicating circuit, by adopting the combination of bleeder circuit, on-off circuit and oscillatory circuit, the break-make of oscillatory circuit and power supply is controlled by on-off circuit, after oscillatory circuit switches on power, vibration exports square wave and then controls the illuminating state of light emitting diode, the conducting state of the voltage division signal gauge tap circuit that bleeder circuit exports, when voltage division signal is lower than setting value, on-off circuit conducting, thus LED flash instruction state of charge.Circuit structure adopts basic electronic devices and components to build and can realize, and greatly can reduce circuit cost, improves product competitiveness.
After reading the detailed description of the utility model embodiment by reference to the accompanying drawings, other features of the present utility model and advantage will become clearly.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of embodiment functional-block diagram of the battery electric quantity detection indicating circuit that the utility model proposes;
Fig. 2 is the circuit theory diagrams that battery electric quantity embodiment illustrated in fig. 1 detects indicating circuit;
Fig. 3 is the oscillatory circuit schematic diagram that battery electric quantity embodiment illustrated in fig. 1 detects indicating circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one, the present embodiment proposes a kind of battery electric quantity and detects indicating circuit, as shown in Figure 1, comprise bleeder circuit, on-off circuit, and oscillatory circuit, the input end of described oscillatory circuit is connected with power supply by described on-off circuit, the output terminal of described oscillatory circuit is connected with power supply VCC by a light emitting diode D1, the input end of described bleeder circuit is connected with the voltage output end VBAT of battery to be detected, the voltage sample output terminal of described bleeder circuit is connected with the control end of on-off circuit, the on off operating mode of described on-off circuit accepts the control of described bleeder circuit output voltage sampled signal.The battery electric quantity of the present embodiment detects indicating circuit, by adopting the combination of bleeder circuit, on-off circuit and oscillatory circuit, the break-make of oscillatory circuit and power supply is controlled by on-off circuit, after oscillatory circuit switches on power, vibration exports square wave and then controls the illuminating state of light emitting diode, the conducting state of the voltage division signal gauge tap circuit that bleeder circuit exports, when voltage division signal is lower than setting value, on-off circuit conducting, thus LED flash instruction state of charge.All circuit of the present embodiment all can adopt basic electronic devices and components to build realization, greatly can reduce circuit cost, improve product competitiveness.
Preferably in the present embodiment, as shown in Figure 3, described oscillatory circuit comprises the first electric capacity C1, second electric capacity C2, one NPN triode Q1, 2nd NPN triode Q2, the collector c1 of a described NPN triode Q1, the base stage b1 of a described NPN triode Q1, the collector c2 of described 2nd NPN triode Q2, be connected with power supply VCC by described on-off circuit after the base stage b2 of described 2nd NPN triode Q2 connects a resistance respectively, wherein, the collector c1 of the one NPN triode Q1 is connected with on-off circuit by resistance R8, the base stage b1 of the one NPN triode Q1 is connected with on-off circuit by resistance R10, the collector c2 of the 2nd NPN triode Q2 is connected with on-off circuit by resistance R11, the base stage b2 of the 2nd NPN triode Q2 is connected with on-off circuit by resistance R9, the collector c1 of a described NPN triode Q1 is connected with the base stage b2 of described 2nd NPN triode Q2 by the first electric capacity C1, the base stage b1 of a described NPN triode Q1 is connected with the collector c2 of described 2nd NPN triode Q2 by the second electric capacity C2, the emitter e 1 of a described NPN triode Q1 is connected with ground end respectively with the emitter e 2 of described 2nd NPN triode Q2.The collector c1 of the one NPN triode Q1 or the collector c2 of the 2nd NPN triode Q2 is output terminal, be connected with the negative pole of light emitting diode D1, in the present embodiment, the principle of work of oscillatory circuit is: oscillatory circuit exports can not be fixed on a certain steady state (SS), it exports meeting checker between two stable states (saturated or cut-off), therefore output waveform is like a nearly square wave, when oscillatory circuit exports high level, light emitting diode D1 ends, not luminous, when oscillatory circuit output low level, light emitting diode D1 conducting, luminous, two NPN triode Q1 in figure, Q2 is at " Q1 saturated/Q2 cut-off " and " Q1 cut-off/Q2 is saturated ", the exchange of two kinds of period of state, its principle of work is as follows:
(1), when on-off circuit conducting, oscillatory circuit is connected moment with VCC, and a NPN triode Q1, the 2nd NPN triode Q2 obtain forward bias by R10, R9 respectively, and the first electric capacity C1, the second electric capacity C2 also charge through R8, R11 respectively simultaneously.
(2), due to a NPN triode Q1, the characteristic of the 2nd NPN triode Q2 cannot be absolutely identical, suppose that the current gain of a NPN triode Q1 is higher than the 2nd NPN triode Q2, then a NPN triode Q1 can be introduced into saturated (ON) state than the 2nd NPN triode Q2, and when a NPN triode Q1 is saturated, second electric capacity C2 by the C-E pole of a NPN triode Q1 through VCC, R9 discharges, a reverse bias is formed in the b-e pole of the 2nd NPN triode Q2, the while of impelling the 2nd NPN triode Q2 to end, the first electric capacity C1 completes through the b-e pole of a resistance R11 and NPN triode Q1 and charges to VCC within the short time.
(3), one NPN triode Q1 saturated (ON), the situation that 2nd NPN triode Q2 ends (OFF) is not stable, after the second electric capacity C2 has discharged (T2=0.7 RB2 C2 second), second electric capacity C2 by VCC through R9, the c-e pole reverse charging of the one NPN triode Q1, when being charged to 0.7V, now the 2nd NPN triode Q2 obtains bias voltage and enters saturated (ON), first electric capacity C1 is by the c-e pole of the 2nd NPN triode Q2, VCC, R10 discharges, similarly, cause the b-e pole reverse blas of a NPN triode Q1, now a NPN triode Q1 ends (OFF), second electric capacity C2 is charged to VCC through the b-e pole of R8 and the 2nd NPN triode Q2 in the short time.
(4), the first electric capacity C1 be discharged after (T=0.7 RB2 C1 second), a NPN triode Q1 obtains bias voltage and conducting through R10, and the 2nd NPN triode Q2 ends (OFF), and repetitiousness circulation like this is gone down.
In order to prevent, electric current is excessive burns out light emitting diode D1, as shown in Figure 2, is in series with a current-limiting resistance R3 between the output terminals A 2 of described oscillatory circuit and described light emitting diode D1.
In the present embodiment, as shown in Figure 2, described on-off circuit adopts PNP triode Q3 to realize, the emitter e 3 of this PNP triode Q3 is connected with power supply VCC, collector c3 is connected with the input end A1 of oscillatory circuit, and base stage b3 is control end, is connected with the voltage sample output terminal of described bleeder circuit.By regulating the voltage sample output valve of bleeder circuit, when output valve is high level, PNP triode Q3 ends, when output valve is low level, and PNP triode Q3 conducting, also i.e. on-off circuit conducting.Certainly, on-off circuit of the present utility model be not limited to adopt PNP triode realize, can also other transistors with on-off function as realizations such as PMOS.
As shown in Figure 2, bleeder circuit in the present embodiment comprises the series circuit be made up of the first resistance R1 and the second resistance R2, described series circuit one end is connected with the voltage output end VBAT of battery to be detected, one end holds GND to be connected with ground in addition, and the voltage sample output terminal of described bleeder circuit is connected between described first resistance R1 and the second resistance R2.By adjusting the ratio of the first resistance R1 and the second resistance R2, can the different and then regulating cell of regulating cell voltage can opening switch circuit when different voltage.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.

Claims (5)

1. a battery electric quantity detects indicating circuit, it is characterized in that: comprise bleeder circuit, on-off circuit and oscillatory circuit, the input end of described oscillatory circuit is connected with power supply by described on-off circuit, the output terminal of described oscillatory circuit is connected with described power supply by a light emitting diode, the input end of described bleeder circuit is connected with the voltage output end of battery to be detected, the voltage sample output terminal of described bleeder circuit is connected with the control end of on-off circuit, and the on off operating mode of described on-off circuit accepts the control of described bleeder circuit output voltage sampled signal.
2. battery electric quantity according to claim 1 detects indicating circuit, it is characterized in that: described oscillatory circuit comprises the first electric capacity, second electric capacity, one NPN triode, 2nd NPN triode, the collector of a described NPN triode, the base stage of a described NPN triode, the collector of described 2nd NPN triode, the base stage of described 2nd NPN triode is connected one to one respectively after a resistance and is connected with described power supply by described on-off circuit, the collector of a described NPN triode is connected by the base stage of described first electric capacity with described 2nd NPN triode, the base stage of a described NPN triode is connected with the collector of described 2nd NPN triode by the second electric capacity, the emitter of a described NPN triode is connected with ground end respectively with the emitter of described 2nd NPN triode.
3. battery electric quantity according to claim 1 and 2 detects indicating circuit, it is characterized in that: described on-off circuit comprises PNP triode, the emitter of described PNP triode is connected with described power supply, collector is connected with the input end of oscillatory circuit, base stage is control end, is connected with the voltage sample output terminal of described bleeder circuit.
4. battery electric quantity according to claim 3 detects indicating circuit, it is characterized in that: described bleeder circuit comprises the series circuit be made up of the first resistance and the second resistance, described series circuit one end is connected with the voltage output end of battery to be detected, one end is held with ground and is connected in addition, and the voltage sample output terminal of described bleeder circuit is connected between described first resistance and the second resistance.
5. battery electric quantity according to claim 1 and 2 detects indicating circuit, it is characterized in that: be in series with a current-limiting resistance between the output terminal of described oscillatory circuit and described light emitting diode.
CN201520422841.1U 2015-06-18 2015-06-18 Battery electric quantity detects indicating circuit Active CN204719212U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201520422841.1U CN204719212U (en) 2015-06-18 2015-06-18 Battery electric quantity detects indicating circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106772088A (en) * 2016-12-28 2017-05-31 浙江威星智能仪表股份有限公司 A kind of tool circuit of automatic batch detection lithium thionyl chloride cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106772088A (en) * 2016-12-28 2017-05-31 浙江威星智能仪表股份有限公司 A kind of tool circuit of automatic batch detection lithium thionyl chloride cell

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