CN1622418A - Switching unit for mean power supply of double battery - Google Patents
Switching unit for mean power supply of double battery Download PDFInfo
- Publication number
- CN1622418A CN1622418A CN 200310112251 CN200310112251A CN1622418A CN 1622418 A CN1622418 A CN 1622418A CN 200310112251 CN200310112251 CN 200310112251 CN 200310112251 A CN200310112251 A CN 200310112251A CN 1622418 A CN1622418 A CN 1622418A
- Authority
- CN
- China
- Prior art keywords
- link
- integrated circuit
- couples
- resistance
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The change-over device for averaging power source with double batteries includes one operation amplifier, five resistors, two PMOS transistor, one NMOS transistor, and two IC's. The operation amplifier has its enable end connected to the first voltage and ground end grounded, and all the elements and device connected to constitute the change-over device. The change-over device is used to decide which battery of two is used for powering and to switch over the powering battery in case the powering battery has voltage lower than that of the idle battery.
Description
Technical field
The invention relates to a kind of switching device shifter, and the switching device shifter of particularly on average powering relevant for a kind of double cell.
Background technology
When a system has two batteries with the supply system power supply, the mode that conventional practice normally adopts power supply simultaneously or separate type partly to power, the electric power output that distributes two batteries.Wherein, when two batteries are powered simultaneously, system is generally the electric weight that utilizes two batteries of process monitoring, with the electric power of two batteries of average output, but program is at the electric weight of detecting two batteries and during on average exporting the electric power of two batteries, because the relation that circulates in the program, cause electric weight that program can't two batteries of detecting real-time and the electric power of on average exporting two batteries, therefore, the mode that this kind powered simultaneously with two batteries, and the electric power of two batteries of mean allocation efficiently.As for when two batteries separate power supply, system switches and uses another battery with power supply for after the power drain of a battery.It is evident that the mode that this kind separates power supplies with two batteries, electric power that can't two batteries of mean allocation.So under two powered battery can't the situation of mean allocation, just the electric power of two batteries can't mean allocation under, be familiar with this skill as can be known, the electric power of two batteries is with easy approach exhaustion, and the electric power of two batteries can't be done the most effective utilization.
Summary of the invention
In view of this, the present invention proposes a kind ofly can determine what the person's power supply of two batteries according to the indivedual voltage of two batteries height, and the battery electric power of power supply more not the battery electric power of power supply hang down under the situation of certain value, switch to the powered battery of power supply not.
The present invention proposes the average power supply source switching device of a kind of double cell, comprising: operational amplifier, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, a PMOS transistor, the 2nd PMOS transistor, nmos pass transistor, first integrated circuit and second integrated circuit.Wherein, operational amplifier has first input end, second input, output, activation end and earth terminal, and the activation end of operational amplifier couples first voltage, and the earth terminal of operational amplifier couples ground.First resistance has first link and second link, and second link of first resistance couples ground.Second resistance has first link and second link, and first link of second resistance couples second battery in the double cell, and second link of second resistance couples second input of operational amplifier.The 3rd resistance has first link and second link, and first link of the 3rd resistance couples first battery in the double cell, and second link of the 3rd resistance couples the first input end of operational amplifier.The 4th resistance has first link and second link, and first link of the 4th resistance couples second voltage.The 5th resistance has first link and second link, and second link of the 5th resistance couples ground.The one PMOS transistor has gate terminal, drain end and source terminal, and the gate terminal of a PMOS transistor couples the output of operational amplifier, the drain end of the one PMOS transistor couples first link of first resistance, then couples second input of operational amplifier as for the source terminal of a PMOS transistor.The 2nd PMOS transistor has gate terminal, drain end and source terminal, and the gate terminal of the 2nd PMOS transistor couples second link of the 4th resistance, the drain end of the one PMOS transistor couples first link of the 5th resistance, then couples the first input end of operational amplifier as for the source terminal of a PMOS transistor.Nmos pass transistor has gate terminal, drain end and source terminal, and the gate terminal of nmos pass transistor couples the output of operational amplifier, and the drain end of nmos pass transistor couples second link of the 4th resistance, then couples ground as for the source terminal of nmos pass transistor.First integrated circuit has input, output and activation end, and the input of first integrated circuit couples first battery, and the activation end of first integrated circuit then couples the output of operational amplifier.Second integrated circuit has input, output and activation end, and the input of second integrated circuit couples second battery, the output of the output of second integrated circuit and first integrated circuit is coupled to a bit, then couple the drain end of nmos pass transistor as for the activation end of second integrated circuit, in addition, this point is the power output end of double cell.
In preferred embodiment of the present invention, the average power supply source switching device of double cell more comprises: first electric capacity and second electric capacity.Wherein, first electric capacity has first link and second link, and first link of first electric capacity couples first battery, and second link of first electric capacity couples ground.Second electric capacity has first link and second link, and first link of second electric capacity couples first battery, and second link of second electric capacity couples ground.
In sum, the present invention proposes the switching device shifter that a kind of double cell that uses operational amplifier, MOS transistor and integrated circuit is on average powered.By the current potential that double cell has difference in indivedual inputs of operational amplifier, control by what person in the double cell is exported as power supply with decision as the MOS transistor and the integrated circuit of switch.Therefore, the present invention can be according to the indivedual voltage of double cell height, what the person's power supply of decision double cell, and the battery electric power of power supply more not the battery electric power of power supply hang down under the situation of certain value, switch to the powered battery of power supply not.
Description of drawings
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
The circuit block diagram of the switching device shifter that Fig. 1 on average powers for the double cell in the preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 1, the circuit block diagram of the switching device shifter that it is on average powered for the double cell in the invention preferred embodiment.In this embodiment, the double cell switching device shifter 100 of on average powering is made up of operational amplifier 101, resistance R 1-R5, integrated circuit 109,111 and capacitor C 1, C2.Wherein, integrated circuit 109,111 is the integrated circuit with the two PMOS transistors that couple in back-to-back mode.
When the resistance R 3 in the switching device shifter 100 that double cell is on average powered, integrated circuit 109 and resistance R 2, integrated circuit 111 couple last first battery and second battery respectively, the running of the switching device shifter 100 that double cell is on average powered is as follows: when supposing beginning, the voltage of first battery is greater than the voltage of second battery and just be, operational amplifier 101 when promptly beginning it+voltage of input can be considered the voltage that second battery is provided via resistance R 2, its-voltage of input can be considered the voltage that first battery is provided via resistance R 3.Therefore operational amplifier 101 it+voltage of input less than its-voltage of input.Deduct-the multiple output of input terminal voltage according to being output as of operational amplifier 101+input terminal voltage, so the time operational amplifier 101 be output as low level (low) voltage, promptly the A voltage of ordering is low.
Because the voltage that this moment, A was ordered is low, therefore, the gate terminal voltage of PMOS transistor 103 is low, and its source terminal is by accepting the positive voltage that second battery is provided via resistance R 2, its drain end is via resistance R 1 ground connection, so the time PMOS transistor 103 state for opening (ON).By it seems via resistance R 2, B point, PMOS transistor 103, resistance R 3 to the loop on ground by second battery, the voltage that B is ordered is the dividing potential drop of voltage on resistance R 1 of second battery, and promptly the B voltage of ordering is by the drop-down positive voltage * R1/ that is provided by second battery (R1+R2).
The voltage of ordering at A be low simultaneously, the G1 of integrated circuit 109, G2 end (being the indivedual gate terminal of back-to-back PMOS transistor) is low, its D2, D2 end (being the drain end group of back-to-back PMOS transistor one) receives the positive voltage that first battery is provided, its S1, S2 end (being the indivedual source terminal of back-to-back PMOS transistor) couples mutually, so be familiar with this skill person as can be known, the positive voltage that the D1 of integrated circuit 109, D1 end (being its drain end group of two of back-to-back PMOS transistor) output first battery is provided.
Also the voltage of ordering at A be low simultaneously, the gate terminal voltage of nmos pass transistor 107 also is low, its source terminal ground connection, high levle (high) voltage that its drain termination is provided via resistance R 4 by a positive voltage VBATSW, so be familiar with this skill person as can be known, the state of the nmos pass transistor 107 of this moment is for closing (OFF).
Also the voltage of ordering at A be low simultaneously, because the state of nmos pass transistor 107 is OFF, therefore the gate of PMOS transistor 105 is accepted the high voltage that a voltage source V BATSW is provided via resistance R 4, its drain end is via resistance R 5 ground connection, its source terminal is accepted the positive voltage that first battery is provided via resistance R 3, so PMOS transistor 105OFF.In view of the above, the C voltage of ordering (operational amplifier 101 it-input) is by receiving the positive voltage that first battery is provided via resistance R 3.Just operational amplifier 101 it-voltage of input is still by receiving the positive voltage that first battery is provided via resistance R 3.
From the above, the voltage of ordering at A be low simultaneously, nmos pass transistor 107 is OFF with the state of PMOS transistor 105, therefore, the voltage that D is ordered is equivalent to the high voltage that voltage source V BATSW itself is provided.So the G1 of integrated circuit 111, the voltage of G2 end are high, are familiar with this skill person also as can be known, the D1 of integrated circuit, D1 hold the positive voltage that its D2, D2 hold second battery that received to be provided are not provided.
So the switching device shifter 100 that double cell is on average powered is at the beginning the time, the positive voltage that is provided with first battery is as the output voltage of the power output end of double cell.
When the first battery continued power, promptly when the electric weight of first battery slowly reduced, (positive voltage that is provided by first battery slowly reduces) also slowly was provided the voltage that C is ordered.When the voltage (positive voltage * R1/ that the B point voltage is still provided by second battery (R1+R2)) that the voltage of ordering up to C is ordered than B is low, just operational amplifier it-input terminal voltage less than its+during input terminal voltage, operational amplifier 101 be output as high voltage, promptly the A point voltage is high.
In like manner, when the A point voltage was high, D1, D1 that D1, the D1 of PMOS transistor 103OFF, integrated circuit 109 end stops to export positive voltage that first battery provided, nmos pass transistor 107ON, integrated circuit 111 held and begin to export the positive voltage that second battery is provided.
And because nmos pass transistor 107ON, the high voltage that voltage source V BATSW provided, part will drop on the resistance R 4, therefore the gate terminal voltage of PMOS transistor 105 is not high, add its source terminal accept positive voltage that first battery provided via resistance R 3 with and the drain end via resistance R 5 ground connection, so PMOS transistor 105ON.And first battery via resistance R 3, PMOS transistor 105 and resistance R 5 to ground, form the loop, and the C point voltage is pulled down to positive voltage * R5/ (R3+R5) that this moment, first battery was provided.
Scrutablely be, when the second battery continued power, less than first battery during in positive voltage * R5/ (R3+R5) that the C point is provided, the output beginning of operational amplifier 101 transfers low to up to the B point voltage, and first battery is taken over and continued power supply.
In addition, it should be noted that, use the purpose of the integrated circuit 109,111 with back-to-back PMOS transistor more to comprise the electric leakage that prevents first, second battery respectively in this embodiment, capacitor C 1, C2 then are respectively as the output waveform of filtering first, second battery.
Comprehensively above-mentioned, the invention provides the switching device shifter that a kind of double cell that uses operational amplifier, MOS transistor and integrated circuit is on average powered.By the voltage that double cell has difference in indivedual inputs of operational amplifier, control by what person in the double cell is exported as power supply with decision as the MOS transistor and the integrated circuit of switch.Therefore, the present invention can be according to the indivedual voltage of double cell height, what the person's power supply of decision double cell, and the battery electric power of power supply more not the battery electric power of power supply hang down under the situation of certain value, switch to the powered battery of power supply not.So the present invention can reach the power supply of mean allocation double cell really.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this operator; without departing from the spirit and scope of the invention; when can doing various changes and retouching, so the present invention's protection range attached rights protection scope person of defining after looking is as the criterion.
Claims (9)
1. average power supply source switching device of double cell is characterized in that comprising:
One operational amplifier has first input end, second input, output, activation end and earth terminal, and the activation end of this operational amplifier couples one first voltage, and the earth terminal of this operational amplifier couples ground;
One first resistance has first link and second link, and second link of this first resistance couples ground;
One second resistance has first link and second link, and first link of this second resistance one of couples in this double cell second battery, and second link of this second resistance couples second input of this operational amplifier;
One the 3rd resistance has first link and second link, and first link of the 3rd resistance one of couples in this double cell first battery, and second link of the 3rd resistance couples the first input end of this operational amplifier;
One the 4th resistance has first link and second link, and first link of the 4th resistance couples one second voltage;
One the 5th resistance has first link and second link, and second link of the 5th resistance couples ground;
One the one PMOS transistor, have gate terminal, drain end and source terminal, the gate terminal of the one PMOS transistor couples the output of this operational amplifier, the drain end of the one PMOS transistor couples first link of this first resistance, and the source terminal of a PMOS transistor couples second input of this operational amplifier;
One the 2nd PMOS transistor, have gate terminal, drain end and source terminal, the gate terminal of the 2nd PMOS transistor couples second link of the 4th resistance, the drain end of the one PMOS transistor couples first link of the 5th resistance, and the source terminal of a PMOS transistor couples the first input end of this operational amplifier;
One nmos pass transistor, have gate terminal, drain end and source terminal, the gate terminal of this nmos pass transistor couples the output of this operational amplifier, and the drain end of this nmos pass transistor couples second link of the 4th resistance, and the source terminal of this nmos pass transistor couples ground;
One first integrated circuit has input, output and activation end, and the input of this first integrated circuit couples this first battery, and the activation end of this first integrated circuit couples the output of this operational amplifier; And
One second integrated circuit, have input, output and activation end, the input of this second integrated circuit couples this second battery, the output of the output of this second integrated circuit and this first integrated circuit is coupled to a bit, the activation end of this first integrated circuit couples the drain end of this nmos pass transistor, wherein, this point is the power output end of this double cell.
2. the average power supply source switching device of double cell as according to claim 1 also comprises:
One first electric capacity has first link and second link, and first link of this first electric capacity couples first link of the 3rd resistance, and second link of this first electric capacity couples ground.
3. the average power supply source switching device of double cell according to claim 1 is characterized in that also comprising:
One second electric capacity has first link and second link, and first link of this second electric capacity couples first link of this second resistance, and second link of this second electric capacity couples ground.
4. the average power supply source switching device of double cell according to claim 1, it is characterized in that: this first integrated circuit is constituted with a back-to-back coupling mode by two PMOS transistors.
5. as the average power supply source switching device of double cell as described in the claim 4, it is characterized in that: this first integrated circuit is a FDS6975 integrated circuit.
6. as the average power supply source switching device of double cell as described in the claim 5, it is characterized in that: this first integrated circuit has first gate terminal, second gate terminal, the first drain end group, the second drain end group, first source terminal and second source terminal, first gate terminal of this first integrated circuit and second gate terminal are coupled to the output of this running amplifier jointly, the second drain end group of this first integrated circuit is coupled to this first battery jointly, the first drain end group of this first integrated circuit is coupled to the output of this second integrated circuit jointly, and first source terminal of this first integrated circuit couples mutually with second source terminal.
7. the average power supply source switching device of double cell according to claim 1, it is characterized in that: this second integrated circuit is constituted with a back-to-back coupling mode by two PMOS transistors.
8. as the average power supply source switching device of double cell as described in the claim 7, it is characterized in that: this second integrated circuit is a FDS6975 integrated circuit.
9. as the average power supply source switching device of double cell as described in the claim 8, it is characterized in that: this second integrated circuit has first gate terminal, second gate terminal, the first drain end group, the second drain end group, first source terminal and second source terminal, first gate terminal of this second integrated circuit and the second gate terminal coupled in common are in the output of this running amplifier, the second drain end group of this second integrated circuit is coupled to this second battery jointly, the first drain end group of this second integrated circuit is coupled to the output of this first integrated circuit jointly, and first source terminal and second source terminal of this second integrated circuit are coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101122510A CN100342614C (en) | 2003-11-24 | 2003-11-24 | Switching unit for mean power supply of double battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101122510A CN100342614C (en) | 2003-11-24 | 2003-11-24 | Switching unit for mean power supply of double battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1622418A true CN1622418A (en) | 2005-06-01 |
| CN100342614C CN100342614C (en) | 2007-10-10 |
Family
ID=34759662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101122510A Expired - Fee Related CN100342614C (en) | 2003-11-24 | 2003-11-24 | Switching unit for mean power supply of double battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100342614C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407543C (en) * | 2006-06-27 | 2008-07-30 | 福建师范大学 | Voltage regulator circuit of electronic apparatus power supplied by duplexing power sources with spare battery |
| CN101212147B (en) * | 2006-12-26 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Power voltage supply circuit |
| CN102916468A (en) * | 2012-10-19 | 2013-02-06 | 北京小米科技有限责任公司 | Battery power supply circuit, battery power supply method and mobile terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5523671A (en) * | 1991-02-14 | 1996-06-04 | Dell Usa, L.P. | Charging system for battery powered devices |
| JPH0946914A (en) * | 1995-07-31 | 1997-02-14 | Oki Electric Ind Co Ltd | Power supply and its charger |
| KR100536589B1 (en) * | 1999-07-27 | 2005-12-14 | 삼성전자주식회사 | battery powered electronic device and power supplying control method thereof |
-
2003
- 2003-11-24 CN CNB2003101122510A patent/CN100342614C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407543C (en) * | 2006-06-27 | 2008-07-30 | 福建师范大学 | Voltage regulator circuit of electronic apparatus power supplied by duplexing power sources with spare battery |
| CN101212147B (en) * | 2006-12-26 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Power voltage supply circuit |
| CN102916468A (en) * | 2012-10-19 | 2013-02-06 | 北京小米科技有限责任公司 | Battery power supply circuit, battery power supply method and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100342614C (en) | 2007-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7281141B2 (en) | Bypass discharge path for a power sourcing equipment | |
| CN109742839A (en) | A kind of charging control circuit and system of bootstrap capacitor | |
| CN208479470U (en) | Adjustable voltage output circuit | |
| CN205490115U (en) | Switching power supply circuit | |
| CN201041734Y (en) | LCD power supply circuit and LCD | |
| CN110224479A (en) | Power-down protection device, control system and power-down protection method thereof | |
| CN105406845B (en) | A kind of PMOS switches off control circuit and for electric installation | |
| CN205160851U (en) | Two unification powers | |
| CN1622418A (en) | Switching unit for mean power supply of double battery | |
| CN206758359U (en) | Relay control circuit and power supply circuit | |
| CN218783715U (en) | High-low side drive control circuit and control system | |
| CN219960153U (en) | Battery cell protection circuit and battery cell management system | |
| CN204681274U (en) | A kind of brshless DC motor metal-oxide-semiconductor drive circuit | |
| CN108696113A (en) | A kind of Switching Power Supply shutdown delay circuit | |
| CN202353659U (en) | Circuit for inputting video signal | |
| CN109787349A (en) | A kind of UPS circuit, power circuit and electronic equipment | |
| CN212367649U (en) | Control device and storage cabinet | |
| CN209088807U (en) | Dc-link capacitance discharge circuit | |
| CN106685224A (en) | Self-adaptive voltage regulator | |
| CN209217948U (en) | A kind of DC-DC circuit and device with over-voltage protecting function | |
| CN101753052B (en) | Pulse width modulating switch power source and power supply control method thereof | |
| CN218499017U (en) | Voltage conversion circuit and electronic device | |
| CN215042612U (en) | Automobile load power supply module and automobile | |
| CN101873735B (en) | LED (light-emitting diode) backlight working circuit | |
| CN215680066U (en) | Backlight protection system, interactive intelligent tablet and intelligent equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071010 Termination date: 20151124 |