CN2907034Y - Circuit for preventing self-discharging of standby battery - Google Patents
Circuit for preventing self-discharging of standby battery Download PDFInfo
- Publication number
- CN2907034Y CN2907034Y CN 200620068265 CN200620068265U CN2907034Y CN 2907034 Y CN2907034 Y CN 2907034Y CN 200620068265 CN200620068265 CN 200620068265 CN 200620068265 U CN200620068265 U CN 200620068265U CN 2907034 Y CN2907034 Y CN 2907034Y
- Authority
- CN
- China
- Prior art keywords
- control switch
- battery
- reserve battery
- oxide semiconductor
- metal oxide
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model relates to a circuit used for preventing self discharging of the emergency battery, which is applied in power supply control circuit. The utility model comprises a first control switch and a second switch, the input end of first control switch is coupled with the standby voltage joint of the power control chip, while the output end of the first control switch is coupled with the input end of the second control switch, the output end of the second control switch is connected with the power input end of the power control chip through a resistance, and the other input end of the second control switch is coupled with the battery anode of the equipment, the cathode is earthed; when the system battery is not installed, the first control switch and the second control switch is switched off to prevent the emergency battery discharge, after the system battery is installed, the first control switch and the second control switch is switched on, so the emergency battery can be charged by the system battery; when the system battery is used up and took off, the emergency battery provides power to the power supply control chip.
Description
[technical field]
The relevant a kind of reserve battery circuit of discharge automatically that prevents of the utility model in especially a kind of power control circuit that is applied to portable electron device, prevents that reserve battery from discharging automatically, and then avoids influencing the product manufacturing and terminal user uses.
[background technology]
In portable electron device, as mobile phone and PDA, after preventing that system battery (as rechargeable battery) from taking off, losing of part essential information (as time etc.) is provided with a reserve battery, mostly as button cell on the main circuit board of this portable electron device, after system battery electric power is used up or is removed, provide electric power by this reserve battery, thereby guarantee the required electric power of part assembly operate as normal, thereby guarantee to make some essential informations to be preserved or continue.And this reserve battery normally just is assembled on the circuit board when this portable electron device assembling, wherein the connecting circuit between system battery and the reserve battery can be joined shown in Figure 1, wherein system battery 10 power inputs direct and power supply control chip 12 couple, to provide the battery control chip 12 electric power, this power supply control chip 12 is changed the electric power that system battery 10 provides, and provide suitable electric power to clock circuit, audio frequency processing circuit and display circuit etc., and the positive pole of this reserve battery 11 is connected with the node of the point of system battery 10 with the power input of this power supply control chip 12 by a resistance R 1, so after system battery 10 is assembled on this portable electron device, this system battery 10 is when providing power supply control chip 12 electric power, and pass through resistance R 1 and give this reserve battery 11 chargings, and when these system battery 10 power drain or when being removed, then change by this reserve battery 11 this power supply control chip 12 electric power are provided, so that this power supply control chip 12 offers partial circuit, as clock circuit electric power, so that safeguard the information that some are basic.Though this kind circuit structure can be realized above-mentioned functions, but it also has following weak point: because of this reserve battery 11 is just to be directly installed on this main circuit board when assembling the main circuit board of this portable electron device, therefore this reserve battery 11 can directly be powered to this power supply control chip 12 by resistance R 1, cause unnecessary power loss in this way, particularly after this main circuit board assembling is finished, also need be through processes such as test and assembling turnovers, after the process long period, the electric power of this reserve battery 11 may exhaust, therefore can when detecting, the final shipment of product cause unnecessary puzzlement, or although this reserve battery 11 still has part electric power when this product turnout, but may in sales process, locate to be detained a period of time and cause this reserve battery power drain, therefore after system battery 10 assemblings are gone up, need take a long time this reserve battery 11 is charged, thereby can influence the service time of this system battery 10.Simultaneously, this reserve battery 11 also can damage because of over-discharge can.
In view of this, be necessary to provide a kind of in fact and can prevent the reserve battery circuit of discharge automatically, in case the locking system battery when not being mounted to electronic installation as yet this reserve battery discharge automatically, thereby avoid when product turnout, causing unnecessary puzzlement and prevent this reserve battery over-discharge can and damage.
[summary of the invention]
The utility model purpose is to provide a kind of reserve battery circuit of discharge automatically that prevents, in case the locking system battery when not being mounted to electronic installation as yet this reserve battery discharge automatically, thereby avoid when product turnout, causing unnecessary puzzlement and prevent this reserve battery over-discharge can and damage.
For reaching above-mentioned purpose, the utility model prevents the reserve battery circuit of discharge automatically, be applied in the power control circuit of portable electron device, the system battery of this portable electron device and the power input of power supply control chip couple, this circuit that prevents that reserve battery from discharging automatically comprises first control switch and second control switch, wherein the V Standby pin of the input of first control switch and this power supply control chip couples, and the input of its output and second control switch couples, and couple by the positive pole of resistance and reserve battery, and the output of second control switch is connected with the power input of power supply control chip by a resistance, and another input of this second control switch and the positive pole of reserve battery couple, and the minus earth of this reserve battery, when system battery is unassembled, second control switch and first control switch all disconnect, this reserve battery discharges automatically when preventing so that system battery is unassembled, and after the system battery assembling is gone up, first control switch and second control switch are all connected, and system battery can charge to reserve battery, and when the system battery power drain or when being removed, this reserve battery provides power supply control chip electric power, and the electric power of part parts is provided.
According to above-mentioned principal character, this first control switch mainly comprises a N channel depletion type metal oxide semiconductor field effect tube, the input of this first control switch is the grid of this N channel depletion type metal oxide semiconductor field effect tube, its output then is the drain electrode of this N channel depletion type metal oxide semiconductor field effect tube, and the source ground of this N channel depletion type metal oxide semiconductor field effect tube.
According to above-mentioned principal character, this second control switch mainly comprises a P channel depletion type metal oxide semiconductor field effect tube, the input of this second control switch is the grid of this P channel depletion type metal oxide semiconductor field effect tube, and another input of this second control switch is the source electrode of this P channel depletion type metal oxide semiconductor field effect tube, and the output of this second control switch is the drain electrode of this P channel depletion type metal oxide semiconductor field effect tube.
Compared to prior art, the utility model is provided with first and second control switch between reserve battery and power supply control chip, control the conducting state of first control switch by the V Standby of power supply control chip, so, when system battery is not mounted on the electronic installation, first control switch is in off-state, and then make second control switch disconnect, make thus between reserve battery and this power supply control chip and be in off state, thereby prevent to discharge automatically when this reserve battery is on system battery is unassembled, thereby avoid when product turnout, causing unnecessary puzzlement and prevent this reserve battery over-discharge can and damage.
For making the purpose of this utility model, structural feature and function thereof there are further understanding, cooperate diagram to be described in detail as follows now:
[description of drawings]
Fig. 1 is the circuit connection diagram of existing reserve battery, system battery and power supply control chip.
Fig. 2 prevents the reserve battery circuit diagram of discharge automatically for implementing the utility model.
[embodiment]
See also shown in Figure 2, prevent the reserve battery circuit diagram of discharge automatically for implementing the utility model, the utility model prevents that the circuit application of the automatic discharge of reserve battery is in the power control circuit of portable electron device, the system battery 20 of this portable electron device couples with the power input 221 of power supply control chip 22 mutually by a diode D1, wherein the positive pole of this system battery 20 is connected with the positive pole of diode D1, and the minus earth of this system battery 20, and this circuit that prevents that reserve battery from discharging automatically comprises first control switch 23 and second control switch 24, wherein the input 230 of first control switch 23 couples mutually with the V Standby pin 220 of this power supply control chip 22, and the input 240 of its output 231 and second control switch 24 couples, and the output 241 of second control switch 24 is connected with the power input 221 of power supply control chip 22 by a resistance R 3, and another input 242 of this second control switch 24 and the positive pole of reserve battery 21 couple, and the minus earth of this reserve battery 21, when system battery 20 is unassembled, first control switch 23 and two control switchs 24 all disconnect, this reserve battery 21 discharges automatically when preventing so that system battery 20 is unassembled, and after system battery 20 assemblings are gone up, first control switch 23 and second control switch 24 are all connected, and system battery 20 can be to reserve battery 21 chargings, and when system battery 20 power drain or when being removed, this reserve battery 21 provides power supply control chip 22 electric power, and the electric power of part parts is provided, to keep some basic information of this portable electron device.
In the present embodiment, this first control switch 23 mainly comprises a N channel depletion type metal oxide semiconductor field effect tube Q1, the input 230 of this first control switch 23 is the grid G of this N channel depletion type metal oxide semiconductor field effect tube Q1, and the output 231 of this first control switch 23 is the drain D of this N channel depletion type metal oxide semiconductor field effect tube Q1, and the source S ground connection of this N channel depletion type metal oxide semiconductor field effect tube Q1, and be connected in series a resistance R 5 between the grid G of this this N channel depletion type metal oxide semiconductor field effect tube Q1 and the source S, when the V Standby pin 220 of power supply control chip 22 is high level, promptly the grid G of this N channel depletion type metal oxide semiconductor field effect tube Q1 is a high level, then this N channel depletion type metal oxide semiconductor field effect tube Q1 conducting.
And this second control switch 24 also mainly comprises a P channel depletion type metal oxide semiconductor field effect tube Q2, the input 240 of this second control switch 24 is the grid G of this P channel depletion type metal oxide semiconductor field effect tube Q2, and the output 241 of this second control switch 24 is the drain D of this P channel depletion type metal oxide semiconductor field effect tube Q2, and the source S of this P channel depletion type metal oxide semiconductor field effect tube Q2 and the positive pole of reserve battery 21 couple, and the minus earth of this reserve battery 21, and be connected in series a resistance R 4 between the grid G of this P channel depletion type metal oxide semiconductor field effect tube Q2 and the source S.
Be mounted on the main circuit board of this portable electron device when reserve battery 21 after, this moment, the input 240 of second control switch 24 was a high level, promptly the grid G of this P channel depletion type metal oxide semiconductor field effect tube Q2 is a high level, then this this P channel depletion type metal oxide semiconductor field effect tube Q2 ends, so open circuit between this reserve battery 21 and the power supply control chip 22, can prevent that so reserve battery 21 from discharging automatically.And be assembled on the main circuit board of this portable electron device when system battery 20 after, then system battery 20 provides power supply control chip 22 electric power, thereby make the V Standby pin 220 of this power supply control chip 22 be high level, promptly the grid G of this N channel depletion type metal oxide semiconductor field effect tube Q1 is a high level, then this N channel depletion type metal oxide semiconductor field effect tube Q1 conducting, so the drain D of this N channel depletion type metal oxide semiconductor field effect tube Q1 is low level, thereby making the grid G of this P channel depletion type metal oxide semiconductor field effect tube Q2 is low level, thereby make this P channel depletion type metal oxide semiconductor field effect tube Q2 conducting, so conducting between this reserve battery 21 and the power supply control chip 22, so system battery 20 gives reserve battery 21 chargings by resistance R 3, and when system battery 20 power drain or when being removed, this moment, then reserve battery 21 provided power supply control chip 22 electric power, the V Standby pin 220 that then makes this power supply control chip 22 is according to being high level, thereby guarantee that this N channel depletion type metal oxide semiconductor field effect tube Q1 and P channel depletion type metal oxide semiconductor field effect tube Q2 all are conducting state, thereby make this power supply control chip 22 that some basic circuits are provided, the electric power required as clock circuit work is to keep the essential information of this portable electron device.
Compared to prior art, the utility model is provided with first control switch 23 and second control switch 24 between reserve battery 21 and power supply control chip 22, control the conducting state of first control switch 23 by the V Standby of power supply control chip 22, so, when system battery 20 is not mounted on the electronic installation, first control switch 23 is in off-state, and then make second control switch 24 disconnect, make thus between reserve battery 21 and this power supply control chip 22 and be in off state, thereby prevent to discharge automatically when this reserve battery 21 is on system battery 20 is unassembled, thereby avoid when product turnout, causing unnecessary puzzlement and prevent these reserve battery 21 over-discharge can and damage.
Claims (3)
1, a kind of reserve battery circuit of discharge automatically that prevents, be applied in the power control circuit of electronic installation, the system battery of this electronic installation and the power input of power supply control chip couple, it is characterized in that: this circuit that prevents that reserve battery from discharging automatically comprises first control switch and second control switch, wherein the V Standby pin of the input of first control switch and this power supply control chip couples, and the input of its output and second control switch couples, and couple by the positive pole of resistance and reserve battery, and the output of second control switch is connected with the power input of power supply control chip by a resistance, and another input of this second control switch and the positive pole of reserve battery couple, and the minus earth of this reserve battery, when system battery is unassembled, second control switch and first control switch all disconnect, this reserve battery discharges automatically when preventing that system battery is unassembled, and after the system battery assembling is gone up, first control switch and second control switch are all connected, and system battery can charge to reserve battery, and when the system battery power drain or when being removed, this reserve battery provides power supply control chip electric power, and the electric power of part parts is provided.
2, the reserve battery circuit of discharge automatically that prevents as claimed in claim 1, it is characterized in that: this first control switch mainly comprises a N channel depletion type metal oxide semiconductor field effect tube, the input of this first control switch is the grid of this N channel depletion type metal oxide semiconductor field effect tube, its output then is the drain electrode of this N channel depletion type metal oxide semiconductor field effect tube, and the source ground of this N channel depletion type metal oxide semiconductor field effect tube.
3, the reserve battery circuit of discharge automatically that prevents as claimed in claim 2, it is characterized in that: this second control switch mainly comprises a P channel depletion type metal oxide semiconductor field effect tube, the input of this second control switch is the grid of this P channel depletion type metal oxide semiconductor field effect tube, and another input of this second control switch is the source electrode of this P channel depletion type metal oxide semiconductor field effect tube, and the output of this second control switch is the drain electrode of this P channel depletion type metal oxide semiconductor field effect tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068265 CN2907034Y (en) | 2006-01-05 | 2006-01-05 | Circuit for preventing self-discharging of standby battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068265 CN2907034Y (en) | 2006-01-05 | 2006-01-05 | Circuit for preventing self-discharging of standby battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2907034Y true CN2907034Y (en) | 2007-05-30 |
Family
ID=38115679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620068265 Expired - Fee Related CN2907034Y (en) | 2006-01-05 | 2006-01-05 | Circuit for preventing self-discharging of standby battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2907034Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114784575A (en) * | 2022-03-17 | 2022-07-22 | 西安易朴通讯技术有限公司 | Method and device for preventing hot plugging during product assembly, electronic equipment and storage medium |
-
2006
- 2006-01-05 CN CN 200620068265 patent/CN2907034Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114784575A (en) * | 2022-03-17 | 2022-07-22 | 西安易朴通讯技术有限公司 | Method and device for preventing hot plugging during product assembly, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101459347B (en) | Charger and method for controlling connection between the charger and external electric power source | |
| CN112398096B (en) | Lithium battery protection circuit with ultra-low power consumption | |
| CN103138376A (en) | Power switching circuit and power switching method thereof | |
| CN102044906A (en) | Power supply switching circuit and electronic device capable of automatically switching power supply | |
| US11025087B2 (en) | Control circuit compatible with battery power supply and external power supply | |
| CN102403741A (en) | Battery leakage protection circuit | |
| CN111313374A (en) | Battery system under-voltage protection circuit and method applied to electric bicycle BMS | |
| CN2907034Y (en) | Circuit for preventing self-discharging of standby battery | |
| CN114696387A (en) | Terminal discharge control method, discharge controller and terminal | |
| CN104115361A (en) | Method and circuitry for battery protection | |
| CN105048606A (en) | Battery discharge protection circuit and rechargeable battery pack with discharge protection function | |
| CN215420220U (en) | Low-power consumption wake-up circuit and electronic equipment | |
| CN212543422U (en) | Lithium battery output control circuit and multi-string lithium battery protection board | |
| CN205059485U (en) | A dormancy control circuit and electric automobile controller for electric automobile controller | |
| CN212784806U (en) | Rocket self-holding power supply and distribution control circuit and electrical equipment | |
| CN101175227A (en) | IC chip and its electric control method | |
| CN208813015U (en) | Rouser, energy storage device and the vehicle of battery management system | |
| CN108832700B (en) | Wake-up and dormancy circuit of Hall switch | |
| CN201497947U (en) | Power management circuit with embedded chip | |
| CN111934661A (en) | Startup and shutdown control circuit | |
| CN219477618U (en) | Pure hardware control circuit for switching on and switching off output end of battery pack | |
| CN1330072C (en) | A telephone set power supply management circuit | |
| CN217335117U (en) | Power supply wake-up circuit, power supply circuit and passive protection device | |
| CN214755646U (en) | Data protection circuit after power supply is turned off | |
| CN109450071A (en) | A kind of power switching circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |