CN2737095Y - A telephone set power management circuit - Google Patents
A telephone set power management circuit Download PDFInfo
- Publication number
- CN2737095Y CN2737095Y CNU2004200371215U CN200420037121U CN2737095Y CN 2737095 Y CN2737095 Y CN 2737095Y CN U2004200371215 U CNU2004200371215 U CN U2004200371215U CN 200420037121 U CN200420037121 U CN 200420037121U CN 2737095 Y CN2737095 Y CN 2737095Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- triode
- power supply
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a telephone set power supply management circuit, which comprises a charging circuit which is connected with external alternating current power supply. A secondary battery is connected to the rear of the charging circuit; the telephone set power supply management circuit is characterized in that the external alternating current power supply is connected with a load through a switch voltage stabilizing circuit; the positive pole of the secondary battery is mutually connected with the input pole of the switch voltage stabilizing circuit through a first diode; the charging circuit is intelligent and limited; the secondary battery supplies power for the load after the econdary battery passes through a switch state voltage stabilizing circuit. The utility model overcomes the various defects existing in prior art when the power supply and the battery are switched, simultaneously simplifies the circuit of the product, and also decreases the cost spent on solving the technical problems; the powering time of the battery is increased, the battery has the advantages of quick charging, power expenditure saving, no worry of overcharging and overdischarging, and longer service life.
Description
Technical field
The utility model relates to a kind of management circuit of power supply, especially relates to a kind of management circuit of phone power supply.
Background technology
Now increasing compact electric apparatus uses more piece, and ni-mh/chromium multiple batteries bag is as built-in non-maintaining backup battery, and especially on mobile phone and cordless telephone, its advantage is that cost is low, and capacity is big, and the life-span is long.But there is big problem in the switching of circuit in the past between main power source and powered battery, its external power adopts direct-current switch power supply, and be provided with the one-level voltage stabilizing circuit, and battery (three joints) is received on the output stage of voltage stabilizing circuit by diode, just direct powering load, because of there is pulse current in the RF radiating portion of radio apparatus, and immediate current can reach 2A, if battery directly links to each other with load circuit, with the battery increase of service time, the internal resistance of battery increases, and just can't provide voltage stable 2A electric current, and this moment, phone single-pass will occur in conversation, the abnormal phenomenons of similar network such as broken string; In addition, very big (the 3.6V～4.2V) of voltage phase difference when the voltage of three batteries is full of and during emptying, when cell voltage is very low, when being arranged, the dispatch from foreign news agency input can produce very big step, and be raised to this step signal of dispatch from foreign news agency normal power supply voltage (4.0V) from 3.6V and may cause circuit to crash.In order to overcome above-mentioned defective, people improve original technology, and the secondary voltage stabilizing circuit is set after AC power, and previous stage is a switch voltage-stabilizing circuit, back one-level is linear low pressure reduction voltage stabilizing circuit, four economize on electricity sources is connected to the input utmost point of back one-level voltage stabilizing circuit by diode.Yet there is this weak point in technical scheme after the improvement, is circuit complexity, cost height on the one hand; Because of back level voltage stabilizing circuit is linear output,, make that the power-on time of four batteries is also shorter than the power-on time of three batteries on the other hand because there is quiescent dissipation in voltage stabilizing circuit; In addition, what four batteries adopted in the above-mentioned electric power management circuit is the floating charge mode, and voltage difference is bigger, phenomenon such as therefore exist battery to be not fully filled or charging current is excessive, can significantly reduce the useful life of battery, cause the damage of battery, can make battery explosion or cause fire when serious.
Summary of the invention
Technical problem to be solved in the utility model is to provide at above-mentioned prior art present situation that a kind of circuit is simple, cost is low, battery-powered time is long, and charging is fast, the power consumptive province, the sorrow of no super-charge super-discharge, the phone electric power management circuit of battery long service life.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of management circuit of phone power supply, comprise the charging circuit that is connected with external AC power supply, be connected with rechargeable battery behind the described charging circuit, described external AC power supply is connected with load by a switch voltage-stabilizing circuit, and the positive pole of described rechargeable battery is connected with the input utmost point of described switch voltage-stabilizing circuit by first diode.
Described switch voltage-stabilizing circuit comprises the voltage stabilizing circuit chip that a model is MC34063, the positive pole of described rechargeable battery by described first diode after the Ipk of first resistance and described voltage stabilizing circuit chip and V-IN pin and connect, the Drc pin of described voltage stabilizing circuit chip and ISWC pin are connected to the grid of first metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is connected with the Ipk of described voltage stabilizing circuit chip and the also contact of V-IN pin, the source electrode of described first metal-oxide-semiconductor is connected with the COMP pin of described voltage stabilizing circuit chip with second resistance by first inductance, and the source electrode of described first metal-oxide-semiconductor is simultaneously by voltage stabilizing didoe ground connection.
Described charging circuit comprises charge power supply and charging control circuit, described charging control circuit comprises one first switching circuit and the battery voltage detection circuit that is connected with the anode of described rechargeable battery, the control end of described first switching circuit is connected with first signaling interface of a single-chip microcomputer, described single-chip microcomputer is provided with the first switching circuit control program, when the voltage of described rechargeable battery less than 4.9 volts, conducting and the disconnection at interval of described first switching circuit of described Single-chip Controlling, the ratio of the opening time of the ON time of described first switching circuit and described first switching circuit is 1: 3, when the voltage of described rechargeable battery greater than 4.9 volts, the continuous conducting of described first switching circuit of described Single-chip Controlling, when the voltage of described rechargeable battery greater than 5.8 volts, described first switching circuit of described Single-chip Controlling disconnects.
Described battery voltage detection circuit comprises charge-discharge circuit and comparator, described charge-discharge circuit comprises one the 3rd resistance and first electric capacity, described first electric capacity, one end ground connection, the other end of described first electric capacity is connected with an end of described the 3rd resistance, the other end of described first electric capacity is connected to the positive input terminal of described comparator simultaneously, the other end of described the 3rd resistance is connected with an end of the 4th resistance, the other end of described the 4th resistance is connected with the anode of described rechargeable battery, described the 3rd resistance is simultaneously by the second switch circuit ground, the control end of described second switch circuit is connected with the secondary signal interface of described single-chip microcomputer, the negative input end of described comparator is connected with comparative voltage, the output of described comparator is connected with the 3rd signaling interface of described single-chip microcomputer by the 11 resistance, described single-chip microcomputer is provided with the battery voltage detection program, and the battery voltage detection program is as follows: disconnect described first switching circuit; The described second switch circuit of conducting waits for that described first capacitor discharge of chien shih finishes when sufficiently long; Disconnecting described second switch circuit makes described rechargeable battery charge to described first electric capacity; Wait for that described first electric capacity of chien shih when sufficiently long is charged to the voltage of described rechargeable battery; The described second switch circuit of conducting also picks up counting; When the signal of the output of described comparator is 0, stops timing and disconnect described second switch circuit; Institute's survey time and time reference value are relatively calculated the voltage of surveying, finish voltage detecting; Described first switching circuit of conducting returns charging procedure.
Described comparator is connected with load by one the 3rd switching circuit, when loaded work piece, and described the 3rd switching circuit conducting, when load was closed, described the 3rd switching circuit disconnected.
Described first switching circuit comprises first metal-oxide-semiconductor, the source electrode of described first metal-oxide-semiconductor is connected with the anode of described rechargeable battery with second diode by the 5th resistance, the drain electrode of described second metal-oxide-semiconductor is connected with described charge power supply, the drain electrode of described second metal-oxide-semiconductor is by one the 6th resistance and the collector electrode that is connected to first triode after the grid of described second metal-oxide-semiconductor is connected, the grounded emitter of described first triode, the base stage of described first triode are that first signaling interface of the single-chip microcomputer of 89C51 is connected by the 7th resistance and model.
Described second switch circuit is one second triode, the collector electrode of described second triode is connected with described the 3rd resistance, the grounded emitter of described second triode, the base stage of described second triode are that the secondary signal interface of the single-chip microcomputer of 89C51 is connected by the 8th resistance and described model.
Described the 3rd switching circuit comprises the 3rd triode, the collector electrode of described the 3rd triode is connected with described comparator, between the collector electrode of described the 3rd triode and described comparator, be connected by second capacity earth, the emitter of described the 3rd triode is connected with the anode of described rechargeable battery, the base stage of described the 3rd triode is connected with the collector electrode of the 4th triode by the 9th resistance, the grounded emitter of described the 4th triode, the base stage of described the 4th triode is connected with load by the tenth resistance.
Compared with prior art, advantage of the present utility model is that rechargeable battery passes through powering load behind the switch attitude voltage stabilizing circuit, the various defectives that exist when between power supply and battery, switching in the prior art have not only been overcome, simplified the circuit of product simultaneously, also reduced solving the cost that technical problem spent, battery-powered time increases; With a voltage stabilizing circuit chip and a metal-oxide-semiconductor is that main element is formed a switch attitude voltage stabilizing circuit, has the advantage that pressure reduction is low, reaction speed is fast; Charging circuit adopts the mode of intelligent limited charging, and charging is fast, the power consumptive province, the sorrow of no super-charge super-discharge, and battery prolongs useful life greatly; First switching circuit that is provided with can be at cell voltage during less than 4.9 volts, conducting of pulsewidth ratio and disconnection with 1: 3, thereby the less mean charging current of usefulness under this state is charged to rechargeable battery, can prevent that the initiation of charge electric current is excessive and shorten life-span of battery; Battery voltage detection circuit can detect the voltage of battery at any time, combines with charging control circuit to prevent overcharging and putting excessively of battery; Thoroughly cut off charging circuit after battery charge finishes, avoid consumption electrolyte inside; Be provided with that battery discharges from battery voltage detection circuit under the situation that the 3rd switching circuit can prevent to cut out in load (phone shutdown), reduce " static leakage phenomenon ".
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model;
Fig. 3 is a charging control program of the present utility model;
Fig. 4 is a battery voltage detection program of the present utility model;
Fig. 5 is the theory diagram of prior art.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in the figure, a kind of management circuit of phone power supply, comprise the charging circuit 1 that is connected with external AC power supply AC, charging circuit 1 comprises charge power supply 2 and charging control circuit 3, be connected with rechargeable battery 4 behind the charging control circuit 3, external AC power supply AC is connected with load by a switch voltage-stabilizing circuit 5, the positive pole of rechargeable battery 4 is connected with the input utmost point of switch voltage-stabilizing circuit 5 by the first diode D1, switch voltage-stabilizing circuit 5 comprises the voltage stabilizing circuit chip IC 1 that a model is MC34063, the positive pole of rechargeable battery 4 by the first diode D1 after the Ipk and the V-IN pin of first resistance R 1 and voltage stabilizing circuit chip IC 1 and connect, the Drc pin of voltage stabilizing circuit chip IC 1 and ISWC pin are connected to the grid of the first metal-oxide-semiconductor TM1, the drain electrode of the first metal-oxide-semiconductor TM1 is connected with the Ipk of voltage stabilizing circuit chip IC 1 and the also contact of V-IN pin, the source electrode of the first metal-oxide-semiconductor TM1 is connected with the COMP pin of voltage stabilizing circuit chip IC 1 with second resistance R 2 by first inductance L 1, the source electrode of the first metal-oxide-semiconductor TM1 is simultaneously by voltage stabilizing didoe D ground connection, charging control circuit 3 comprises one first switching circuit 31, first switching circuit 31 comprises one second metal-oxide-semiconductor TM2, the source electrode of the second metal-oxide-semiconductor TM2 is connected with the anode of rechargeable battery 4 with the second diode D2 by the 5th resistance R 5, the drain electrode of the second metal-oxide-semiconductor TM2 is connected with charge power supply 2, the drain electrode of the second metal-oxide-semiconductor TM2 is by one the 6th resistance R 6 and the collector electrode that is connected to the first triode T1 after the grid of the second metal-oxide-semiconductor TM2 is connected, the grounded emitter of the first triode T1, the base stage of the first triode T1 is that the first signaling interface IO1 of the single-chip microcomputer (not shown) of 89C51 is connected by the 7th resistance R 7 and model, the anode of rechargeable battery 4 is connected with battery voltage detection circuit 32, battery voltage detection circuit 32 comprises charge-discharge circuit 33 and comparator 34, charge-discharge circuit 33 comprises one the 3rd resistance R 3 and first capacitor C 1, first capacitor C, 1 one end ground connection, the other end of first capacitor C 1 is connected with an end of the 3rd resistance R 3, the other end of first capacitor C 1 is connected to the positive input terminal of comparator 34 simultaneously, the other end of the 3rd resistance R 3 is connected with an end of the 4th resistance R 4, the other end of the 4th resistance R 4 is connected with the anode of rechargeable battery 4, the 3rd resistance R 3 is simultaneously by second switch circuit 35 ground connection, second switch circuit 35 comprises one second triode T2, the collector electrode of the second triode T2 is connected with the 3rd resistance R 3, the grounded emitter of the second triode T2, the base stage of the second triode T2 is that the secondary signal interface IO2 of the single-chip microcomputer of 89C51 is connected by the 8th resistance R 8 and model, the negative input end of comparator 34 is connected with comparative voltage, the output of comparator 34 is that the 3rd signaling interface IO3 of the single-chip microcomputer of 89C51 is connected by the 11 resistance R 11 and model, comparator 34 is connected with load R by the 3rd switching circuit 6, the 3rd switching circuit 6 comprises the 3rd triode T3, the collector electrode of the 3rd triode T3 is connected with comparator 34, between the collector electrode of the 3rd triode T3 and comparator 34, be connected by second capacitor C, 2 ground connection, the emitter of the 3rd triode T3 is connected with the anode of rechargeable battery 4, the base stage of the 3rd triode T3 is connected with the collector electrode of the 4th triode T4 by the 9th resistance R 9, the grounded emitter of the 4th triode T4, the base stage of the 4th triode T4 is connected with load R by the tenth resistance R 10, when load R works, 6 conductings of the 3rd switching circuit, when closing (as the phone shutdown) at load R, the 3rd switching circuit 6 disconnects.The whole charging control program of single-chip microcomputer is as shown in the figure: when beginning to charge, at first enter the battery voltage detection program, the battery voltage detection program is as follows: disconnect first switching circuit 31, conducting second switch circuit 35, wait for chien shih first capacitor C 1 discharge off when sufficiently long, disconnect second switch circuit 35 and make 1 charging of 4 pairs first capacitor C of rechargeable battery, wait for that chien shih first capacitor C 1 when sufficiently long is charged to the voltage of rechargeable battery 4, conducting second switch circuit 35 also picks up counting, when the signal of the output of comparator 34 is IO3=0, stop timing and disconnect second switch circuit 35, institute's survey time and time reference value are relatively calculated the voltage of surveying, finish voltage detecting, the time reference value can be put the high memory of single-chip microcomputer into, as do not have the then available 24C64 of high memory and substitute, conducting first switching circuit 31 returns charging procedure; After finishing the battery voltage detection program, during charging control program judges whether charging circuit 1 charges, be then to enter the first switching circuit control program, otherwise judge that whether cell voltage is less than 5.3 volts, be then to enter the first switching circuit control program, otherwise get back to the battery voltage detection program; The first switching circuit control program is: when the voltage of rechargeable battery 4 less than 4.9 volts, Single-chip Controlling first switching circuit 31 conducting and the disconnection at interval, the ratio of the opening time of the ON time of first switching circuit 31 and first switching circuit 31 is 1: 3, when the voltage of rechargeable battery 4 greater than 4.9 volts, the 31 continuous conductings of Single-chip Controlling first switching circuit; Whether the voltage of next judging rechargeable battery 4 is less than 5.8 volts, be then to continue charging, and filling the mode timer entirely picks up counting, otherwise start time-delay and stop filling timer, and Single-chip Controlling first switching circuit 31 disconnects under following three kinds of situations: 1. time-delay stops filling the timer timing and equals 1 hour, or 2. fill the mode charging interval entirely greater than 8 hours, or 3.-dV＞0.05 volt; This moment, charging circuit 1 stopped charging.
In the foregoing description, model is that the voltage stabilizing circuit chip of MC34063 can substitute with other chips with identical function, and model is that the single-chip microcomputer of 89C51 equally also can substitute with the single-chip microcomputer of other models with identical function.
Claims (8)
1, a kind of management circuit of phone power supply, comprise the charging circuit that is connected with external AC power supply, be connected with rechargeable battery behind the described charging circuit, it is characterized in that described external AC power supply is connected with load by a switch voltage-stabilizing circuit, the positive pole of described rechargeable battery is connected with the input utmost point of described switch voltage-stabilizing circuit by first diode.
2, the management circuit of a kind of phone power supply as claimed in claim 1, it is characterized in that described switch voltage-stabilizing circuit comprises the voltage stabilizing circuit chip that a model is MC34063, the positive pole of described rechargeable battery by described first diode after the Ipk of first resistance and described voltage stabilizing circuit chip and V-IN pin and connect, the Drc pin of described voltage stabilizing circuit chip and ISWC pin are connected to the grid of first metal-oxide-semiconductor, the drain electrode of described first metal-oxide-semiconductor is connected with the Ipk of described voltage stabilizing circuit chip and the also contact of V-IN pin, the source electrode of described first metal-oxide-semiconductor is connected with the COMP pin of described voltage stabilizing circuit chip with second resistance by first inductance, and the source electrode of described first metal-oxide-semiconductor is simultaneously by voltage stabilizing didoe ground connection.
3, the management circuit of a kind of phone power supply as claimed in claim 1, it is characterized in that described charging circuit comprises charge power supply and charging control circuit, described charging control circuit comprises one first switching circuit and the battery voltage detection circuit that is connected with the anode of described rechargeable battery, and the control end of described first switching circuit is connected with first signaling interface of a single-chip microcomputer.
4, the management circuit of a kind of phone power supply as claimed in claim 3, it is characterized in that described battery voltage detection circuit comprises charge-discharge circuit and comparator, described charge-discharge circuit comprises one the 3rd resistance and first electric capacity, described first electric capacity, one end ground connection, the other end of described first electric capacity is connected with an end of described the 3rd resistance, the other end of described first electric capacity is connected to the positive input terminal of described comparator simultaneously, the other end of described the 3rd resistance is connected with an end of the 4th resistance, the other end of described the 4th resistance is connected with the anode of described rechargeable battery, described the 3rd resistance is simultaneously by the second switch circuit ground, the control end of described second switch circuit is connected with the secondary signal interface of described single-chip microcomputer, the negative input end of described comparator is connected with comparative voltage, and the output of described comparator is connected with the 3rd signaling interface of described single-chip microcomputer by the 11 resistance.
5, the management circuit of a kind of phone power supply as claimed in claim 3 is characterized in that described comparator is connected with load by one the 3rd switching circuit.
6, the management circuit of a kind of phone power supply as claimed in claim 3, it is characterized in that described first switching circuit comprises second metal-oxide-semiconductor, the source electrode of described second metal-oxide-semiconductor is connected with the anode of described rechargeable battery with second diode by the 5th resistance, the drain electrode of described second metal-oxide-semiconductor is connected with described charge power supply, the drain electrode of described second metal-oxide-semiconductor is by one the 6th resistance and the collector electrode that is connected to first triode after the grid of described second metal-oxide-semiconductor is connected, the grounded emitter of described first triode, the base stage of described first triode are that first signaling interface of the single-chip microcomputer of 89C51 is connected by the 7th resistance and model.
7, the management circuit of a kind of phone power supply as claimed in claim 3, it is characterized in that described second switch circuit is one second triode, the collector electrode of described second triode is connected with described the 3rd resistance, the grounded emitter of described second triode, the base stage of described second triode are that the secondary signal interface of the single-chip microcomputer of 89C51 is connected by the 8th resistance and described model.
8, the management circuit of a kind of phone power supply as claimed in claim 3, it is characterized in that described the 3rd switching circuit comprises the 3rd triode, the collector electrode of described the 3rd triode is connected with described comparator, between the collector electrode of described the 3rd triode and described comparator, be connected by second capacity earth, the emitter of described the 3rd triode is connected with the anode of described rechargeable battery, the base stage of described the 3rd triode is connected with the collector electrode of the 4th triode by the 9th resistance, the grounded emitter of described the 4th triode, the base stage of described the 4th triode is connected with load by the tenth resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200371215U CN2737095Y (en) | 2004-06-22 | 2004-06-22 | A telephone set power management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200371215U CN2737095Y (en) | 2004-06-22 | 2004-06-22 | A telephone set power management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2737095Y true CN2737095Y (en) | 2005-10-26 |
Family
ID=35307821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200371215U Expired - Fee Related CN2737095Y (en) | 2004-06-22 | 2004-06-22 | A telephone set power management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2737095Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968568A (en) * | 2017-12-12 | 2018-04-27 | 清华四川能源互联网研究院 | A kind of low-power consumption constant on-time timing circuit design method and timing circuit |
| CN109413281A (en) * | 2018-12-07 | 2019-03-01 | 山东比特智能科技股份有限公司 | Wireless automatic Accreditation System and register method |
-
2004
- 2004-06-22 CN CNU2004200371215U patent/CN2737095Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968568A (en) * | 2017-12-12 | 2018-04-27 | 清华四川能源互联网研究院 | A kind of low-power consumption constant on-time timing circuit design method and timing circuit |
| CN107968568B (en) * | 2017-12-12 | 2024-03-12 | 清华四川能源互联网研究院 | Low-power consumption constant-on-time timing circuit design method and timing circuit |
| CN109413281A (en) * | 2018-12-07 | 2019-03-01 | 山东比特智能科技股份有限公司 | Wireless automatic Accreditation System and register method |
| CN109413281B (en) * | 2018-12-07 | 2023-10-24 | 山东比特智能科技股份有限公司 | Automatic registration system for cordless telephone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101667739B (en) | Power supply device and discharging method thereof | |
| CN101420130A (en) | Series connection batteries automatic equalization regulating method and device | |
| CN201490745U (en) | Charger | |
| CN105356561B (en) | Double-battery charge discharge system and method | |
| CN205945204U (en) | Modular emergent guarantee power | |
| CN104993534A (en) | Mobile terminal and charge control method thereof | |
| CN105656118A (en) | Device supporting automatic switch of power-consumption/power-supply modes and equipment comprising device | |
| CN103607010A (en) | Charging and discharging control device and method of mobile power source | |
| CN103248100A (en) | Back-up power source charging-discharging control circuit | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN104300605B (en) | Power circuit and control method thereof | |
| CN204012830U (en) | Portable power source | |
| CN108306345A (en) | Intelligent energy-saving device of energy storage inverter system | |
| CN203278327U (en) | Backup power supply charging and discharging control circuit | |
| CN111999662B (en) | Method for detecting external switch state of battery of UPS | |
| CN100440612C (en) | Photoelectric charger, charging method and its electronic products used thereof | |
| CN1330072C (en) | A telephone set power supply management circuit | |
| CN2737095Y (en) | A telephone set power management circuit | |
| CN207098742U (en) | A kind of wide input module formula DC UPS circuit | |
| CN201499006U (en) | Power supply for on-line monitoring system of transmission line | |
| CN100361369C (en) | An intelligent charging circuit | |
| CN102377203B (en) | A kind of electronic equipment and charge control method thereof | |
| CN211830278U (en) | Charging management system for rechargeable battery | |
| CN205389127U (en) | Nickel cadmium cell charger | |
| CN201150007Y (en) | Mobile power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051026 |