CN103779839B - A kind of automatic shutoff start-up circuit adopting rechargeable battery to power - Google Patents
A kind of automatic shutoff start-up circuit adopting rechargeable battery to power Download PDFInfo
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- CN103779839B CN103779839B CN201410034319.6A CN201410034319A CN103779839B CN 103779839 B CN103779839 B CN 103779839B CN 201410034319 A CN201410034319 A CN 201410034319A CN 103779839 B CN103779839 B CN 103779839B
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- voltage
- rechargeable battery
- automatic shutoff
- stabilivolt
- load
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Abstract
The invention discloses a kind of automatic shutoff start-up circuit adopting rechargeable battery to power, including rechargeable battery, automatic shutoff voltage stabilivolt, output voltage initialization circuit, current-limiting resistance, audion, load; Wherein said output voltage initialization circuit is for being maintained at setting value by the output voltage stabilization of rechargeable battery; Described current-limiting resistance is combined into load and provides operating current by matching with audion; Described automatic shutoff voltage stabilivolt is used for providing shutoff output voltage control signal, when the output voltage of rechargeable battery is protected lower than automatic shutoff voltage stabilivolt input undervoltage, controls the voltage running voltage lower than load of input load. The present invention, by increasing automatic shutoff voltage stabilivolt in start-up circuit, can effectively prevent the overdischarge of battery, it is adaptable to rechargeable battery is powered the design of start-up circuit, has broad application prospects.
Description
Technical field
The present invention relates to a kind of automatic shutoff start-up circuit, particularly relate to rechargeable battery electric power system technical field.
Background technology
Universal along with portable electric appts, directly utilizes the electronic equipment that rechargeable battery powers and has been widely used for the various aspects of people's productive life.
Along with the intelligence degree of electronic equipment is more and more higher, simulation, digit chip are used widely in circuit design. And from the consideration of volume and cost, device required in circuit also receives certain restriction. The problems such as life-span, cost, service efficiency and circuit protection are utilized for what low cost, small size rechargeable battery electric power system should consider battery. The number of times in service life of rechargeable battery is directly related with discharge and recharge degree, has stronger nonlinear characteristic. Along with the difference of discharge voltage degree, battery terminal voltage, output electric current all can produce very big change. The battery charging and discharging management circuit cost of current function admirable is on the high side, limits the application in low cost occasion of the rechargeable battery protection circuit. It is thus desirable to fully in conjunction with the operating characteristic of battery, research is applicable to the control technology of low cost occasion battery charging and discharging management.
Set the running voltage of start-up circuit by audion, mu balanced circuit, be used widely with its low cost with the steady state working voltage needed for proof load IC circuit, have that control is simple, reliability high, a good stability and the advantage such as be easily achieved. This patent mainly improves traditional start-up circuit, the control of occasion of rechargeable battery being powered with realization, it is prevented that battery over-discharge is to improve service life.
Summary of the invention
The technical problem to be solved is for rechargeable battery powered electronic device, in order to promote the service life of rechargeable battery (lithium battery, lead-acid battery etc.), propose low cost, high reliability battery powered managing realize method, by controlling the output services voltage of start-up circuit, it is achieved avoid battery over-discharge.
The present invention solves above-mentioned technical problem by the following technical solutions:
The present invention proposes a kind of automatic shutoff start-up circuit adopting rechargeable battery to power, including rechargeable battery, automatic shutoff voltage stabilivolt, output voltage initialization circuit, current-limiting resistance, audion; The positive pole of rechargeable battery is connected with the colelctor electrode of one end of current-limiting resistance, audion respectively; The other end of described current-limiting resistance is connected with the negative electrode of automatic shutoff voltage stabilivolt, and the anode of described automatic shutoff voltage stabilivolt connects the base stage of the input of output voltage initialization circuit, audion respectively; The emitter stage of described audion connects one end of the outfan of output voltage initialization circuit, load respectively; The other end ground connection of load.
When rechargeable battery voltage is less than automatic shutoff voltage stabilivolt voltage, automatic shutoff voltage stabilivolt blocks start-up circuit work, and the output end voltage of start-up circuit is approximately 0;
When rechargeable battery voltage deducts automatic shutoff voltage stabilivolt voltage less than normal working voltage needed for load, the output voltage of start-up circuit is the running voltage that rechargeable battery voltage deducts automatic shutoff voltage stabilivolt;
When rechargeable battery voltage deducts automatic shutoff voltage stabilivolt voltage more than normal working voltage needed for load, the output voltage stabilization of start-up circuit is maintained at setting value and is supplied to load by output voltage initialization circuit.
As the further prioritization scheme of automatic shutoff start-up circuit of the present invention, described output voltage initialization circuit includes the first electric capacity, voltage stabilizing chip TL431, the second resistance, the 3rd resistance, electric capacity of voltage regulation; Wherein, the anode of described automatic shutoff voltage stabilivolt connects the base stage of the negative electrode of voltage stabilizing chip TL431, one end of the first electric capacity and audion respectively; The benchmark port of described voltage stabilizing chip TL431 is connected with one end of one end of the second resistance, the 3rd resistance respectively; The emitter stage of described audion connects one end of the other end of the second resistance, one end of electric capacity of voltage regulation and load respectively; The other end of described load, the other end of electric capacity of voltage regulation, the other end of the 3rd resistance, the anode of voltage stabilizing chip TL431 and the other end of the first electric capacity be connected with the negative pole of rechargeable battery respectively after ground connection.
As the further prioritization scheme of automatic shutoff start-up circuit of the present invention, described output voltage initialization circuit includes the first electric capacity, the second stabilivolt and electric capacity of voltage regulation; Wherein, the anode of described automatic shutoff voltage stabilivolt connects the base stage of one end of the first electric capacity, the negative electrode of the second stabilivolt and audion respectively; The emitter stage of described audion connects one end of electric capacity of voltage regulation and one end of load respectively; The other end of described load, the other end of electric capacity of voltage regulation, the anode of the second stabilivolt and the other end of the first electric capacity be connected with the negative pole of rechargeable battery respectively after ground connection.
As the further prioritization scheme of automatic shutoff start-up circuit of the present invention, described load is analog IC chip or digital IC chips.
As the further prioritization scheme of automatic shutoff start-up circuit of the present invention, rechargeable battery is lithium battery or lead-acid battery or other types charge-discharge battery.
The present invention adopts above technical scheme compared with prior art, has following technical effect that
The present invention by increasing stabilivolt in start-up circuit, and when battery is lower than certain voltage, start-up circuit does not reoffer the running voltage needed for IC chip load, can effectively prevent the overdischarge of battery. The present invention has the advantage that component is few, cost is low, by monitoring battery input voltage, it is judged that whether the output voltage of start-up circuit is stationary value. By the control of automatic shutoff voltage stabilivolt, desirably prevent the overdischarge of battery. This circuit is applicable to rechargeable battery and powers the design of start-up circuit, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is the preferred embodiments of the present invention principle framework schematic diagrams.
When Fig. 2 is cell voltage change, start-up circuit change in voltage schematic diagram.
The another kind of embodiment that Fig. 3 is the present invention realizes method schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is described in further detail:
As it is shown in figure 1, which show the preferred embodiments of the present invention principle framework figure. V1 is rechargeable battery, it is possible to be lithium battery or lead-acid battery. R1 is current-limiting resistance, by with Q1 pipe with the use of, it is possible to set can for load R4 provide maximum operating currenbt; Z1 is automatic shutoff voltage stabilivolt, is used for setting battery over-discharge protection electrical voltage point. Electric capacity C1, voltage stabilizing chip U1, resistance R2 and resistance R3 are output voltage initialization circuit, so that the stable voltage formed on load R4; C2 is electric capacity of voltage regulation; R4 is the load of start-up circuit, it is possible to be numeral or the analog chips such as single-chip microcomputer.
As V1, < during Z1, the output end voltage of start-up circuit is 0, does not produce any power consumption, as shown in Figure 2 the first stage.
As V1-Z1, < running voltage of numeral or fictitious load chip IC, the output end voltage of start-up circuit can not meet numeral or the normal operation of analog IC chip, and required electric current is extremely low leakage current. Second stage as shown in Figure 2.
Work as V1-Z1 > numeral or the running voltage of fictitious load chip IC, the numeral IC such as a burning voltage set up by the outfan of start-up circuit, single-chip microcomputer could normal operation, such as+5V. Start-up circuit provides tens mA electric currents needed for steady operation. Phase III as shown in Figure 2.
As shown in Figure 2 during cell voltage change, start-up circuit change in voltage schematic diagram, it is seen that only cell voltage is higher than certain value, and the output voltage of start-up circuit is just the stable voltage needed for digit chip. When input voltage is lower than 6V, start-up circuit output voltage is approximately 0. When input voltage is 6V to 11V change, start-up circuit output voltage linearly rises, but lower than the steady state working voltage of digit chip, digit chip does not work, and therefore the power consumption of start-up circuit is extremely low. Only when input voltage is higher than 11V, start-up circuit output voltage just sets up stationary value, and digit chip could normal operation. Therefore the discharge voltage of battery can just be controlled by such method, it is prevented that battery over-discharge affects service life. Input voltage point needed for certain start-up circuit steady operation can pass through the value of automatic shutoff voltage stabilivolt Z1 in Fig. 1 and arbitrarily set.
As shown in Figure 3, which show the automatic shutoff start-up circuit schematic diagram of another example of the present invention. V1 is rechargeable battery, it is possible to be lithium battery or lead-acid battery. R1 is current-limiting resistance, by with Q1 pipe with the use of, it is possible to set can for load R2 provide maximum operating currenbt; Z1 is automatic shutoff voltage stabilivolt, is used for setting battery over-discharge protection electrical voltage point. Electric capacity C1, stabilivolt Z2 are output voltage initialization circuit, so that the stable voltage formed on load R2; C2 is electric capacity of voltage regulation; R2 is the load of start-up circuit, it is possible to be numeral or the analog chips such as single-chip microcomputer.
The design parameter of the preferred embodiment of the present invention is as follows:
Rechargeable battery under-voltage protection point is 11VDC; The output voltage 4.5VDC that start-up circuit sets; Output electric current 50mA; Output filter capacitor C2 is 2 �� F; Automatic shutoff voltage stabilivolt Z1 is 6.2V stabilivolt, and current-limiting resistance R1 is 1K; Pliotron Q1 is 2SD882; Filter capacitor C1 is 0.1 �� F, U1 be TL431, R2 be 7K, R3 is 10K;R4 is load, and essence is digit chip or the analog chips such as the single-chip microcomputer having certain steady state working voltage requirement.
Claims (3)
1. the automatic shutoff start-up circuit that a kind adopts rechargeable battery to power, it is characterised in that: include rechargeable battery, automatic shutoff voltage stabilivolt, output voltage initialization circuit, current-limiting resistance, audion; The positive pole of rechargeable battery is connected with the colelctor electrode of one end of current-limiting resistance, audion respectively; The other end of described current-limiting resistance is connected with the negative electrode of automatic shutoff voltage stabilivolt, and the anode of described automatic shutoff voltage stabilivolt connects the base stage of the input of output voltage initialization circuit, audion respectively; The emitter stage of described audion connects one end of the outfan of output voltage initialization circuit, load respectively; The other end ground connection of load; Described output voltage initialization circuit includes the first electric capacity, voltage stabilizing chip, the second resistance, the 3rd resistance, electric capacity of voltage regulation; Wherein, the anode of described automatic shutoff voltage stabilivolt connects the base stage of the negative electrode of voltage stabilizing chip, one end of the first electric capacity and audion respectively; The benchmark port of described voltage stabilizing chip is connected with one end of one end of the second resistance, the 3rd resistance respectively; The emitter stage of described audion connects one end of the other end of the second resistance, one end of electric capacity of voltage regulation and load respectively; The other end of described load, the other end of electric capacity of voltage regulation, the other end of the 3rd resistance, the anode of voltage stabilizing chip and the other end of the first electric capacity be connected with the negative pole of rechargeable battery respectively after ground connection; Described load is analog IC chip or digital IC chips; Described rechargeable battery is lithium battery or lead-acid battery or other types charge-discharge battery.
2. a kind of automatic shutoff start-up circuit adopting rechargeable battery to power according to claim 1, it is characterised in that: the model of described voltage stabilizing chip is TL431.
3. the automatic shutoff start-up circuit that a kind adopts rechargeable battery to power, it is characterised in that: include rechargeable battery, automatic shutoff voltage stabilivolt, output voltage initialization circuit, current-limiting resistance, audion; The positive pole of rechargeable battery is connected with the colelctor electrode of one end of current-limiting resistance, audion respectively; The other end of described current-limiting resistance is connected with the negative electrode of automatic shutoff voltage stabilivolt, and the anode of described automatic shutoff voltage stabilivolt connects the base stage of the input of output voltage initialization circuit, audion respectively; The emitter stage of described audion connects one end of the outfan of output voltage initialization circuit, load respectively; The other end ground connection of load; Described output voltage initialization circuit includes the first electric capacity, the second stabilivolt and electric capacity of voltage regulation; Wherein, the anode of described automatic shutoff voltage stabilivolt connects the base stage of one end of the first electric capacity, the negative electrode of the second stabilivolt and audion respectively; The emitter stage of described audion connects one end of electric capacity of voltage regulation and one end of load respectively; The other end of described load, the other end of electric capacity of voltage regulation, the anode of the second stabilivolt and the other end of the first electric capacity be connected with the negative pole of rechargeable battery respectively after ground connection; Described load is analog IC chip or digital IC chips; Described rechargeable battery is lithium battery or lead-acid battery or other types charge-discharge battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410034319.6A CN103779839B (en) | 2014-01-24 | 2014-01-24 | A kind of automatic shutoff start-up circuit adopting rechargeable battery to power |
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| CN201410034319.6A CN103779839B (en) | 2014-01-24 | 2014-01-24 | A kind of automatic shutoff start-up circuit adopting rechargeable battery to power |
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| CN103779839B true CN103779839B (en) | 2016-06-08 |
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| CN107196390B (en) * | 2017-06-14 | 2023-04-18 | 桂林电子科技大学 | Wireless charging device and method |
| CN110492434A (en) * | 2019-05-29 | 2019-11-22 | 广东明丰电源电器实业有限公司 | A kind of under-voltage protecting circuit that brief and practical can restore automatically |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203722214U (en) * | 2014-01-24 | 2014-07-16 | 南京邮电大学 | Self-switching-off starting circuit powered by rechargeable battery |
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| CN101908755A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Overdischarge protector for battery |
| KR100973142B1 (en) * | 2010-04-01 | 2010-07-29 | 이대교 | Power compensating device for electric load on vehicle using edlc and method therefor |
| CN102545163A (en) * | 2010-12-24 | 2012-07-04 | 海洋王照明科技股份有限公司 | Battery discharge protection circuit and LED (Light Emitting Diode) lamp |
| CN203180593U (en) * | 2013-04-18 | 2013-09-04 | 中煤科工集团重庆研究院 | Ceaseless direct current source for mining gas pipe |
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| CN203722214U (en) * | 2014-01-24 | 2014-07-16 | 南京邮电大学 | Self-switching-off starting circuit powered by rechargeable battery |
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Application publication date: 20140507 Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: Nanjing Post & Telecommunication Univ. Contract record no.: 2016320000221 Denomination of invention: Automatic opening type starting circuit powered up by rechargeable battery Granted publication date: 20160608 License type: Common License Record date: 20161129 |
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Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: Nanjing Post & Telecommunication Univ. Contract record no.: 2016320000221 Date of cancellation: 20180116 |
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