CN105762854B - A kind of battery feed circuit and method of supplying power to - Google Patents
A kind of battery feed circuit and method of supplying power to Download PDFInfo
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- CN105762854B CN105762854B CN201410782130.5A CN201410782130A CN105762854B CN 105762854 B CN105762854 B CN 105762854B CN 201410782130 A CN201410782130 A CN 201410782130A CN 105762854 B CN105762854 B CN 105762854B
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Abstract
The invention discloses a kind of battery feed circuit and method of supplying power to, including metal-oxide-semiconductor, the first triode, the second triode and its several resistance, supplying cell is connected with the source electrode of metal-oxide-semiconductor, it is connected for electric loading with the drain electrode of metal-oxide-semiconductor, regulate and control output voltage by the width of metal-oxide-semiconductor channel, by the second triode as switching switch, when input voltage is more than predeterminated voltage, pressure stabilizing output state is switched the circuit to, by output voltage clamper in predeterminated voltage；When input voltage deficiency predeterminated voltage, straight-through output state is switched the circuit to, exports input voltage to for electric loading with negligible pressure drop.The power supply circuit being designed in this way, it can be when supplying cell electricity abundance, normal pressure stabilizing works normally load circuit, and when supplying cell voltage drops under predeterminated voltage, eliminate pressure drop, it directly powers, supplying cell electricity is made to be fully utilized, extend supplying cell uses the time.
Description
Technical field
The present invention relates to a kind of battery feed circuit and method of supplying power to, can extend service time of battery more particularly to one kind
Battery feed circuit and method of supplying power to.
Background technique
Battery feed circuit is to be connected to supplying cell and for being used for burning voltage between electric loading, cell voltage is turned
Turn to the circuit structure for voltage needed for electric loading.Battery power voltage is usually all a range, and the battery of the prior art supplies
Circuit when input voltage is higher, can make to load normal work in battery capacity abundance by output voltage clamper in predeterminated voltage
Make；But it is lower in battery capacity, when input voltage is lower, since power supply circuit itself can generate certain pressure drop, cause to export
Voltage is unsatisfactory for the needs of loaded work piece, can not work normally, and reduces the utilization efficiency of battery.
Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, provides a kind of battery feed circuit and method of supplying power to, leads to
The improvement to voltage regulator circuit is crossed, feedback switch is added at output voltage, it will be defeated using voltage regulator circuit when output voltage is higher
The voltage of supplying cell is directly inputted by voltage clamping in predeterminated voltage, the automatic transfer switch when output voltage is lower out
For electric loading, to improve the utilization efficiency of battery.
The technical solution adopted by the present invention to solve the technical problems is: a kind of battery feed circuit, is to be connected to power supply
Battery and between electric loading, which includes metal-oxide-semiconductor, the first triode, the second triode, first resistor,
Two resistance, 3rd resistor, the 4th resistance and the 5th resistance；The source electrode of the metal-oxide-semiconductor is connected to supplying cell, the leakage of the metal-oxide-semiconductor
Pole is connected to for electric loading, and the grid of the metal-oxide-semiconductor is connected to the collector of first triode, the current collection of first triode
Pole is connected to supplying cell by second resistance；The emitter of first triode is grounded, the base stage of first triode
It is connected to the collector of the second triode and supplying cell is connected to by first resistor, and the base stage of first triode passes through
4th resistance eutral grounding；The emitter grounding of second triode；It is mutually gone here and there with one end of the 5th resistance one end of the 3rd resistor
It connecing, concatenation point is simultaneously connected with the base stage of the second triode, and the another of the 3rd resistor is connected to power supply load, and described the
The other end of five resistance is grounded.
Preferably, further include the 6th resistance, the grid of the second resistance and the metal-oxide-semiconductor by the 6th resistance with
The collector of first triode is connected.
Preferably, the metal-oxide-semiconductor is P-channel structure.
Preferably, the first triode, the second triode are NPN structure.
A kind of power-supplying method for battery, comprising: a preset linear voltage stabilization module and a switching module are connected to power supply electricity
The output end in pond and between the input terminal of electric loading；The linear voltage stabilization module has pressure stabilizing output state and straight-through output shape
State, the switching module are connected between the output end of linear voltage stabilization module and the control terminal of linear voltage stabilization module；The switching
Module samples the voltage of the output end of the linear voltage stabilization module, when the voltage of the output end of the linear voltage stabilization module
When more than or equal to predetermined voltage threshold, switching module output control signal makes linear voltage stabilization module work in pressure stabilizing output shape
State, when sampled voltage is less than predetermined voltage threshold, switching module, which then exports control signal, works in linear voltage stabilization module directly
Logical output state.
Preferably, the predetermined voltage threshold of the battery feed circuit meets following equation:
Wherein, Vout(th)For the predetermined voltage threshold of battery feed circuit, Vb(th)For the cut-in voltage of the second triode, R3
For the resistance value of 3rd resistor, R5 is the resistance value of the 5th resistance.
The beneficial effects of the present invention are:
1. supplying cell is connected with the source electrode of metal-oxide-semiconductor, it is connected for electric loading with the drain electrode of metal-oxide-semiconductor, passes through metal-oxide-semiconductor channel
Width regulate and control output voltage, by the second triode as switching switch, when input voltage be more than predetermined voltage threshold when, will
Circuit switches to pressure stabilizing output state, by output voltage clamper in predetermined voltage threshold；When input voltage deficiency predeterminated voltage threshold
When value, straight-through output state is switched the circuit to, exports input voltage to for electric loading with negligible pressure drop；So set
The power supply circuit of meter, can be when supplying cell electricity abundance, and normal pressure stabilizing works normally load circuit, and simultaneously
Pressure drop can be eliminated when supplying cell voltage drops under predeterminated voltage, directly power, obtain supplying cell electricity
It adequately utilizes, extend supplying cell uses the time；
2. the collector phase that the collector of the first triode passes through the 6th resistance and the first triode with the grid of metal-oxide-semiconductor
Even, the 6th resistance can carry out type selecting according to the model of metal-oxide-semiconductor and the voltage difference of battery, divide to circuit, output is closed
Suitable threshold value is more in line with the needs of actual use to gate source voltage.
Invention is further described in detail with reference to the accompanying drawings and embodiments；But a kind of battery of the invention is powered electric
Road is not limited to the embodiment.
Detailed description of the invention
Fig. 1 is circuit connection diagram of the invention；
Fig. 2 is the principle of the present invention block diagram.
Specific embodiment
Embodiment, a kind of battery feed circuit shown in Figure 1, of the invention are connected to supplying cell BAT_IN and supply
Between electric loading MCU, the battery feed circuit include metal-oxide-semiconductor Q1, the first triode Q2, the second triode Q3, first resistor R1,
Second resistance R2,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5；The source electrode of metal-oxide-semiconductor Q1 is connected to supplying cell BAT_IN,
The drain electrode of metal-oxide-semiconductor Q1 is connected to for electric loading MCU, and the grid of metal-oxide-semiconductor Q1 is connected to the collector of the first triode Q2, the first triode
The collector of Q2 is connected to supplying cell BAT_IN by second resistance R2；The emitter of first triode Q2 is grounded, and the one or three
The base stage of pole pipe Q2 is connected to the collector of the second triode Q3 and is connected to supplying cell BAT_IN, and by first resistor R1
The base stage of one triode Q2 is grounded by the 4th resistance R4；The emitter grounding of second triode Q3；One end of 3rd resistor R3 and
One end of 5th resistance R5 mutually concatenates, and concatenation point is simultaneously connected with the base stage of the second triode Q3, and 3rd resistor R3's is another
It is connected to for electric loading MCU, the other end of the 5th resistance R5 is grounded.
As a preference, further including the grid of the 6th resistance R6, second resistance R2 and metal-oxide-semiconductor Q1 by the 6th resistance R6
It is connected with the collector of the first triode Q2.
As a preference, metal-oxide-semiconductor Q1 is P-channel structure.
As a preference, the first triode Q2, the second triode Q3 are NPN structure.
A kind of course of work of battery feed circuit of the invention is as follows:
Need to set predetermined voltage threshold according to for electric loading MCU, i.e. adjustment 3rd resistor R3's and the 5th resistance R5
Size；The proportionate relationship for adjusting 3rd resistor R3 and the 5th resistance R5 later, when so that output voltage being equal to predeterminated voltage, second
Triode is connected just；Second triode Q3 is that the switching of pressure stabilizing output state and straight-through output state is used as to switch, the two or three
The function that switch is realized in a metal-oxide-semiconductor replacement also can be used in pole pipe Q3.
The predetermined voltage threshold of battery feed circuit meets following equation:
Wherein, Vout(th)For the predetermined voltage threshold of battery feed circuit, Vb(th)For the cut-in voltage of the second triode, R3
For the resistance value of 3rd resistor, R5 is the resistance value of the 5th resistance.
When the input voltage of supplying cell BAT_IN is higher, that is, when being more than predeterminated voltage, pressure stabilizing output state is worked in, the
Two triodes are begun to turn on, and input voltage clamper is in predeterminated voltage；First triode base stage is begun to shut off, i.e. the first triode
The current potential that collector potential is fed back with the second triode Q3 base stage changes and changes, composition negative feedback control, on feedback voltage
It rises, even if the gate source voltage of metal-oxide-semiconductor Q1 grid declines, reduces output voltage, feedback voltage decline, even if the grid source of metal-oxide-semiconductor Q1
Voltage rise, improve output voltage so that output current potential always clamper in predeterminated voltage.
When the output voltage deficiency predeterminated voltage of supplying cell BAT_IN, straight-through output state, the two or three pole are worked in
Pipe Q3 cut-off, output voltage are no better than input voltage；First triode Q2 is connected, under the collector potential of the first triode Q2
It is down to intimate ground connection, the gate source voltage of metal-oxide-semiconductor Q1 reaches maximum value, and metal-oxide-semiconductor Q1 is fully on, makes input voltage can ignore
Pressure drop export to for electric loading MCU.
A kind of power-supplying method for battery of the invention, a preset linear voltage stabilization module 2 and a switching module 4 are connected to confession
The output end of battery 1 and between the input terminal of electric loading 3；The linear voltage stabilization module 2 has pressure stabilizing output state and leads directly to
Output state, the switching module 4 are connected between the output end of linear voltage stabilization module 2 and the control terminal of linear voltage stabilization module 2；
The switching module 4 samples the voltage of the output end of the linear voltage stabilization module 2, when sampled voltage is greater than or equal in advance
If when voltage threshold, the output control signal of switching module 4 makes linear voltage stabilization module 2 work in pressure stabilizing output state, when sampling electricity
When pressure is less than predetermined voltage threshold, switching module 4, which then exports control signal, makes linear voltage stabilization module 2 work in straight-through output shape
State.
In the present embodiment, linear voltage stabilization module 2 is made of metal-oxide-semiconductor Q1, second resistance R2 and the 6th resistance R6；Switching module
4 by the first triode Q2, the second triode Q3, first resistor R1,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5 group
At；The input terminal of linear voltage stabilization module 2 is the tie point of the source electrode of metal-oxide-semiconductor Q1, and the output end of linear voltage stabilization module 2 is metal-oxide-semiconductor
The tie point of the drain electrode of Q1, the control terminal of linear voltage stabilization module 2 are the company of the inter-collector of the 6th resistance R6 and the first triode
Contact.
Above-described embodiment is only used to further illustrate of the invention a kind of battery feed circuit and method of supplying power to, but the present invention
It is not limited to embodiment, according to the technical essence of the invention any simple modification to the above embodiments, equivalent
Variation and modification, fall within the scope of protection of technical solution of the present invention.
Claims (1)
1. a kind of power-supplying method for battery, it is characterised in that: include:
The output end and the input for electric loading that a preset linear voltage stabilization module and a switching module are connected to supplying cell
Between end；The linear voltage stabilization module has pressure stabilizing output state and straight-through output state, and the switching module is connected to linear steady
Between the output end of die block and the control terminal of linear voltage stabilization module；Output of the switching module to the linear voltage stabilization module
The voltage at end is sampled, and when the voltage of the output end of the linear voltage stabilization module is greater than or equal to predetermined voltage threshold, is cut
Mold changing block output control signal makes linear voltage stabilization module work in pressure stabilizing output state, when sampled voltage is less than predetermined voltage threshold
When, switching module, which then exports control signal, makes linear voltage stabilization module work in straight-through output state；Linear voltage stabilization module is by exhausting
Type metal-oxide-semiconductor, second resistance and the 6th resistance composition；Switching module is by the first triode, the second triode, first resistor, third
Resistance, the 4th resistance and the 5th resistance composition；The source electrode of the depletion type MOS tube is connected to supplying cell, the depletion type MOS tube
Drain electrode be connected to for electric loading, the grid of the depletion type MOS tube is connected to the collector of first triode, the described 1st
The collector of pole pipe is connected to supplying cell by second resistance；The emitter of first triode is grounded, and the described 1st
The base stage of pole pipe is connected to the collector of the second triode and is connected to supplying cell, and first triode by first resistor
Base stage pass through the 4th resistance eutral grounding；The emitter grounding of second triode；One end of the 3rd resistor and the 5th resistance
One end mutually concatenate, concatenation point simultaneously is connected with the base stage of the second triode, the another of the 3rd resistor is connected to power supply
The grid of load, the other end ground connection of the 5th resistance, the second resistance and the depletion type MOS tube passes through the described 6th
Resistance is connected with the collector of the first triode；Wherein, the input terminal of linear voltage stabilization module is the connection of the source electrode of metal-oxide-semiconductor
Point, the output end of linear voltage stabilization module are the tie point of the drain electrode of metal-oxide-semiconductor Q1, and the control terminal of linear voltage stabilization module is the 6th resistance
The tie point of the inter-collector of R6 and the first triode；Predetermined voltage threshold meets following equation:
Wherein, Vout(th)For the predetermined voltage threshold of battery feed circuit, Vb(th)For the cut-in voltage of the second triode, R3
The resistance value of three resistance, R5 are the resistance value of the 5th resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410782130.5A CN105762854B (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit and method of supplying power to |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782130.5A CN105762854B (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit and method of supplying power to |
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| CN105762854A CN105762854A (en) | 2016-07-13 |
| CN105762854B true CN105762854B (en) | 2019-11-05 |
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| CN201410782130.5A Active CN105762854B (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit and method of supplying power to |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106972828A (en) * | 2017-03-31 | 2017-07-21 | 云南同福新能源科技有限公司 | Photovoltaic generation Intelligent remote monitoring system |
| CN107994861A (en) * | 2017-11-20 | 2018-05-04 | 厦门科华恒盛股份有限公司 | A kind of system and method for solving potential potential induction attenuation |
| CN111330159A (en) * | 2020-02-28 | 2020-06-26 | 创领心律管理医疗器械（上海）有限公司 | Implantable medical device and power management system thereof |
| CN113763879B (en) * | 2021-09-15 | 2022-11-18 | 维沃移动通信有限公司 | Power supply circuit, display screen, electronic equipment and power supply control method |
| CN114949414B (en) * | 2022-05-08 | 2023-10-27 | 深圳汉诺医疗科技有限公司 | ECMO equipment power supply method and system |
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| JP2005224047A (en) * | 2004-02-06 | 2005-08-18 | Nec Corp | Method of detecting service life and device of monitoring service life of auxiliary power supply of back-up power supply |
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| CN204424936U (en) * | 2014-12-16 | 2015-06-24 | 厦门雅迅网络股份有限公司 | A kind of battery feed circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001268814A (en) * | 2000-03-17 | 2001-09-28 | Internatl Business Mach Corp <Ibm> | Power supply device, electric equipment, and power supply method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005224047A (en) * | 2004-02-06 | 2005-08-18 | Nec Corp | Method of detecting service life and device of monitoring service life of auxiliary power supply of back-up power supply |
| CN103795051A (en) * | 2012-11-01 | 2014-05-14 | 海洋王（东莞）照明科技有限公司 | Overvoltage protection circuit and lamp |
| CN103280765A (en) * | 2013-06-05 | 2013-09-04 | 青岛歌尔声学科技有限公司 | Overvoltage protection circuit |
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| CN105762854A (en) | 2016-07-13 |
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