CN201178323Y - Inversion energy accumulation type power source circuit - Google Patents
Inversion energy accumulation type power source circuit Download PDFInfo
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- CN201178323Y CN201178323Y CNU2008200856835U CN200820085683U CN201178323Y CN 201178323 Y CN201178323 Y CN 201178323Y CN U2008200856835 U CNU2008200856835 U CN U2008200856835U CN 200820085683 U CN200820085683 U CN 200820085683U CN 201178323 Y CN201178323 Y CN 201178323Y
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- lithium battery
- power supply
- charging
- battery charge
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Abstract
The utility model relates to an inverse energy-storage power supply circuit, which comprises a lithium battery charging circuit, a series-connection lithium battery charge/discharge protection circuit and an inversion circuit. The lithium battery charging circuit is provided with a lithium ion battery charge control chip for monitoring the voltage and the current for charging in a real-time manner. The series-connection lithium battery charge/discharge protection circuit is provided with a series-connection lithium battery protection integrated circuit for protecting the overcharge/overdischarge of a series-connection lithium battery pack. The inversion circuit is provided with a power supply chip and converts a DC input into a sine-wave AC output by adopting the techniques, such as bridge rectification, filtration, pulse duration modulation, switch power output, etc. The lithium battery charging circuit is connected with the series-connection lithium battery charge/discharge protection circuit which is connected with the inversion circuit. The power supply circuit is suitable for the normal charging of mobile digital devices, integrates the 220V AC charging and the energy storage, and has the advantages of convenience, practicality and high reliability.
Description
Technical field:
The utility model relates to a kind of inversion energy storage type power circuit, is mainly used in the charging of mobile device.
Background technology:
Along with laptop computer etc. moves popularizing of high-power digital equipment, travel outdoors, regular meeting runs into the embarrassment that mobile device does not have electricity in using suddenly during outdoor sports.Therefore, developing a kind of multifunctional charger that integrates 220V AC charging, energy storage, be fit to all laptop computers and charge normal, is charging of mobile devices as portable power source in the travelling way, with convenient people's life widely in the open air at any time.
Summary of the invention:
Technical problem to be solved in the utility model is to overcome existing above-mentioned deficiency in the prior art, and provides a kind of suitable mobile digital equipment to charge normal, and integrates the inversion energy storage type power circuit of 220V AC charging, energy storage.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this inversion energy storage type power circuit, comprise lithium cell charging circuit, serial lithium battery charge-discharge protection circuit and inverter circuit, it is characterized in that the lithium cell charging circuit is provided with the lithium ion cell charging control chip, the lithium ion cell charging control chip is monitored in real time to the voltage and the electric current of charging; Be provided with serial lithium battery protection integrated circuit in the serial lithium battery charge-discharge protection circuit, serial lithium battery charge protection integrated circuit is protected the super-charge super-discharge of serial lithium battery group; Inverter circuit is provided with power supply chip; inverter circuit utilizes technology such as bridge rectifier, filtering, pulse-width modulation and switch power output to convert the direct current input to sine wave alternating current output; the lithium cell charging circuit is connected with the serial lithium battery charge-discharge protection circuit, and the serial lithium battery charge-discharge protection circuit is connected with inverter circuit.
Lithium ion cell charging control chip described in the utility model adopts LS2858.
Serial lithium battery protection integrated circuit described in the utility model adopts S-8254.
Power supply chip described in the utility model adopts TL494.
The utlity model has suitable mobile digital equipment and charge normal, integrate 220V AC charging, energy storage, convenient and practical reliability advantages of higher.
Description of drawings:
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment:
Referring to Fig. 1; the utility model embodiment inversion energy storage type power circuit comprises lithium cell charging circuit I, serial lithium battery charge-discharge protection circuit II, inverter circuit III; the input of lithium cell charging circuit I meets DC power supply DC; the lithium cell charging circuit I is connected with serial lithium battery charge-discharge protection circuit II; serial lithium battery charge-discharge protection circuit II is connected with inverter circuit III, and the output of inverter circuit III is AC power source of sine wave AC220V.The lithium cell charging circuit I is provided with lithium ion cell charging control chip U1, and lithium ion cell charging control chip U1 monitors in real time to the voltage and the electric current of charging; Be provided with serial lithium battery protection integrated circuit U2 among the serial lithium battery charge-discharge protection circuit II; serial lithium battery protection integrated circuit U2 protects the super-charge super-discharge of serial lithium battery group; inverter circuit III is provided with power supply chip; inverter circuit III utilizes technology such as bridge rectifier, filtering, pulse-width modulation and switch power output to convert the direct current input to sine wave alternating current output; the lithium ion cell charging circuit I is connected with serial lithium battery charge-discharge protection circuit II, and serial lithium battery charge-discharge protection circuit II is connected with inverter circuit III.
The utility model embodiment is the electric weight deposited in will cascaded lithium ion batteries group (B1, B2, B3) converts the output of 220V alternating current to by the method for inversion a kind of device.Because it is lithium ion battery that the energy storage type inversion circuit stores the parts of electric weight, lithium ion cell charging voltage must remain in 4.2V ± 50mV in strictness, if surpass the permanent damage that voltage 4.5V just might cause battery.Lithium ion battery can not be lower than 2.2V when discharge, otherwise can cause the permanent damage of battery.When therefore lithium ion battery being discharged and recharged protective circuit need be set, not overcharge or cross with the assurance lithium ion battery and put.
The main components and parts of the utility model embodiment battery charger I are multi-section lithium ion battery charge control chip U1 (LS2858).Lithium ion cell charging control chip U1 can be simultaneously to the multiple batteries control of charging, charging voltage accurately is provided.
Concrete operation principle is, form the lithium ion cell charging circuit from the direct voltage of the 15V/1.5A of DC power supply DC output through lithium ion cell charging control chip U1 and peripheral circuit thereof, exporting accurately charging voltage charges to lithium ion battery, lithium ion cell charging control chip U1 and peripheral circuit thereof play supervisory function bit to the voltage of charging, 15V voltage provides power supply for after voltage stabilizing didoe Q1 (TL431) voltage stabilizing lithium ion cell charging control chip U1 through resistance R 32 (390 ohm), 6 pin of lithium ion cell charging control chip U1 and 7 pin and peripheral circuit thereof are monitored in real time to the voltage and the electric current of charging respectively, the 8th pin is the output of charging current circuit controls, when charging current just often, the 8th pin is output as high level, triode Q3 (3904) conducting, triode Q3 (3904) current collection is low level very, metal-oxide-semiconductor Q3 (TM9435) conducting, electric current on the charger is through inductance L 1, diode D2 (SK34), resistance R C1 charges to lithium ion battery; When charging current exceeds the setting range of circuit, the 8th pin output low level, triode Q3 (3904) ends; triode Q3 (3904) current collection is high level very; metal-oxide-semiconductor Q3 (TM9435) ends, and charger stops charging to lithium ion battery, and lithium ion battery is protected.
The main components and parts of the utility model embodiment serial lithium battery charge-discharge protection circuit II are 3 joints/4 joint serial lithium battery protection integrated circuit U2 (S-8254).Serial lithium battery protection integrated circuit U2 can monitor accurately to each charging/discharging voltage and electric current that saves lithium ion battery, is not overcharged to guarantee each batteries.
Concrete operation principle is to charge to the cascaded lithium ion batteries group through triode Q4 (AOD403), triode Q5 (AOD403) through the voltage process resettable fuse PTTC of CH+ output; serial lithium battery protection integrated circuit U2 and peripheral circuit thereof are formed cascaded lithium ion batteries charge and discharge protection circuit, overcharging, crossing and put the row protection into the cascaded lithium ion batteries group.The 2nd pin and the resistance R 4 (10K) of serial lithium battery protection integrated circuit U2 detect charging voltage; the 13rd; 14; 15 pin and resistance R I0; resistance R 11; resistance R 12 (resistance is 1K) is monitored the charging voltage of each single battery; the 1st pin and triode Q5; diode D3; capacitor C 14 (0.1uf); resistance R 15 (1M) is formed overcharge protection circuit; when battery is charged to end of charge voltage; serial lithium battery protection integrated circuit U2 the 1st pin output high level; triode Q5 ends; charging finishes, and cell voltage still can pass through triode Q4; diode D4 discharges.
Serial lithium battery protection integrated circuit U2 can monitor accurately to each charging/discharging voltage and electric current that saves lithium ion battery, puts to guarantee that each batteries is not crossed.
Concrete operation principle is that K switch 1, resistance R 22 (1M), resistance R 23 (10K), the triode Q6 (AOD403) in the circuit forms a mains switch, when K switch 1 closure, triode Q6 grid is in low level, triode Q6 conducting, the cascaded lithium ion batteries group is discharged to inverter.
The 3rd pin and resistance R 14 (5.1K), triode Q4, diode D4, capacitor C 12 (0.1uf) are formed over-discharge protection circuit.When battery is in final discharging voltage, lithium ion cell charging control chip U1 the 3rd pin output high level, triode Q4 ends, and discharge finishes, and charging voltage is charged to battery by triode Q5, diode D3.
The utility model embodiment inverter circuit III can be divided into the two large divisions substantially, every part adopts a TL494 power supply chip to form control circuit, wherein the effect of first's circuit power chip U101 is the 12V direct current that the cascaded lithium ion batteries group is provided, and converts alternating current about 30kHz-50kHz, 220V to by high-frequency PWM (pulse-width modulation) switch power technology; The effect of second portion circuit power chip U102 then is to utilize technology such as bridge rectifier, filtering, pulse-width modulation and switch power output, the alternating current about 30kHz～50kHz, 220V is converted to the sine wave alternating current of 50Hz, 220V.
The TL494 built-in chip type has 5V a reference source, and the precision of voltage regulation is 5V ± 5%, and load capacity is 10mA, and exports for external circuit by its 14 pin and to use.Also built-in 2 the NPN power output tubes of TL494 chip can provide the driving force of 500mA.
The resistance R 101 (4.7k) of the 15 pin peripheral circuits of power supply chip U101, electrochemical capacitor C101 (47uF/25V) form the soft starting circuit that powers on.The voltage at electrochemical capacitor C101 two ends is progressively raise by 0V when powering on, and has only when electrochemical capacitor C101 both end voltage to reach 5V when above, just allows the pulse-width modulation circuit of power supply chip U101 inside to start working.Behind power cut-off, electrochemical capacitor C101 guarantees the soft starting circuit operate as normal when power on next time by resistance R 102 (4.7k) discharge.
The resistance R 101 of the 15 pin peripheral circuits of power supply chip U101, thermistor RW1 (300 Ω), resistance R 102 are formed overheating protection circuit; thermistor RW1 is a semistor; the normal temperature resistance can be chosen wantonly in 150 Ω～300 Ω scopes, and suitably choosing can improve the sensitivity that overheating protection circuit starts greatly a bit.
Thermistor RW1 will be close on the metal fin of MOS power tube Q102 (76145) or Q104 (76145) when installing, and could guarantee that like this overheat protective function of circuit is effective.
The voltage to earth value U of 15 pin of power supply chip U101 is important parameters, U ≈ Vcc in Fig. 1 circuit * R102 ÷ (R101+RW1+R102) V, and the calculated value under the normal temperature is U ≈ 6.2V.Require the 15 pin voltages of power supply chip U101 should be a little more than 16 pin voltages (being connected to 5V with chip 14 pin) under the normal operation, the magnitude of voltage size of 6.2V just in time meets the demands under its normal temperature, and slightly leaves certain surplus.
When circuit working unusual, the temperature rise of MOS power tube Q102 (76145) or Q104 (76145) significantly improves, when the resistance of thermistor RW1 surpasses about 4k Ω, the output of power supply chip U101 internal comparator 1 will be high level by the low level upset, 3 pin of power supply chip U101 also upset immediately are high level state, cause the output of PWM comparator, OR-gate and the NOR gate of chip internal all to be overturn, output stage triode VT1 and triode VT2 all transfer cut-off state to.When two power output tubes in the power supply chip U101 end, triode Q101 (9015) in Fig. 1 circuit, Q103 (9015) will be the low level saturation conduction because of base stage, after triode Q101 (9015), Q103 (9015) conducting, MOS power tube Q102 (76145), Q104 (76145) will not be in cut-off state because of grid has positive bias, and inverter power circuit quits work.
The voltage stabilizing didoe Q104 (12V) of the 1 pin peripheral circuit of power supply chip U101; resistance R 105 (1K); diode D101 (5819); electrochemical capacitor C102 (10UF); resistance R 106 (10K) constitutes 12V input power supply overvoltage protection circuit; the voltage stabilizing value of zener diode Q104 (12V) has determined the startup threshold voltage of protective circuit; diode D101 (5819); electrochemical capacitor C102 (10UF); resistance R 106 (10K) is also formed the guard mode holding circuit; as long as the input power supply overvoltage phenomenon of moment takes place; protective circuit will start and keep a period of time, to guarantee the safety of back level power output tube.
The capacitor C 103 (0.0047UF) of the 3 pin peripheral circuits of power supply chip U101, resistance R 105 (1K) are to constitute the key circuit that soft-start time is kept and the circuit protection state is kept that powers on; in fact no matter be the control of circuit soft start or the start-up control of protective circuit, its final result all is reflected on the 3 pin level states of U101.Circuit powers on or protective circuit when starting, and 3 pin of power supply chip U101 are high level.When 3 pin of power supply chip U101 are high level, will charge to capacitor C 103 (0.0047UF).After this inducement that causes protective circuit to start disappeared, capacitor C 103 (0.0047UF) is by resistance R 105 (1K) discharge, and was longer because of the discharge required time, makes the guard mode of circuit still be maintained a period of time.
When 3 pin of power supply chip U101 are high level, also will charge to capacitor C 107 (4.7uF) along resistance R 108 (1K), diode D104 (IN4148), simultaneously the voltage at capacitor C 107 (4.7uF) two ends is offered 4 pin of power supply chip U102, make 4 pin of power supply chip U102 remain high level state.When 4 pin of power supply chip U102 are high level, triode Q105 (9014) and Q108 (9014) in the circuit are in the saturation conduction state, thereafter Ji MOS power tube Q106 (FR320) and Q109 (FR320) will not be in cut-off state because of grid has positive bias, and inverter power circuit quits work.
5 pin external capacitor C104 (472uf) and the 6 pin outer meeting resistance R107 (4.3K) of power supply chip U101 are the timing element of pulse width modulator, and the pulse width modulation frequency that is determined is fosc=1.1 ÷ (0.0047 * 4.3) kHz ≈ 50kHz.Be triode Q101 (9015), the Q103 (9015) in the circuit, the operating frequency of MOS power tube Q102 (76145), Q104 (76145) and transformer T1 is about 50kHz, therefore transformer T1 should select the high frequency ferrite core transformer for use, the effect of transformer T1 is to be the pulse of 220V with the 12V pulse boosting, its primary turns is 20 * 2, and number of secondary turns is 380.
5 pin external capacitor C108 (104uf) and the 6 pin outer meeting resistance R114 (220k) of power supply chip U102 are the timing element of pulse width modulator, and the pulse width modulation frequency that is determined is fosc=1.1 ÷ (÷ (0.1 * 220) the kHz ≈ 50Hz of C108 * R114)=1.1.
Resistance R 129 (3.3k), R130 (3.3k), R127 (100 Ω) and electrochemical capacitor C111 (47uF), voltage stabilizing didoe DZ102 form the overvoltage crowbar of 220V output; when output voltage is too high, will cause zener diode DZ102 to puncture; the 4 pin voltage to earths of power supply chip U102 are risen; output is cut off in protective circuit action in the power supply chip U102.
Claims (4)
1, a kind of inversion energy storage type power circuit; comprise lithium cell charging circuit, serial lithium battery charge-discharge protection circuit and inverter circuit; it is characterized in that: the lithium cell charging circuit is provided with the lithium ion cell charging control chip; the serial lithium battery charge-discharge protection circuit is provided with serial lithium battery protection integrated circuit; inverter circuit is provided with power supply chip; the lithium cell charging circuit is connected with the serial lithium battery charge-discharge protection circuit, and the serial lithium battery charge-discharge protection circuit is connected with inverter circuit.
2, inversion energy storage type power supply according to claim 1 is characterized in that: described lithium ion cell charging control chip adopts LS2858.
3, inversion energy storage type power supply according to claim 1 is characterized in that: described serial lithium battery protection integrated circuit adopts S-8254.
4, inversion energy storage type power supply according to claim 1 is characterized in that: described power supply chip adopts TL494.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200856835U CN201178323Y (en) | 2008-04-09 | 2008-04-09 | Inversion energy accumulation type power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200856835U CN201178323Y (en) | 2008-04-09 | 2008-04-09 | Inversion energy accumulation type power source circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201178323Y true CN201178323Y (en) | 2009-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200856835U Expired - Fee Related CN201178323Y (en) | 2008-04-09 | 2008-04-09 | Inversion energy accumulation type power source circuit |
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| Country | Link |
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| CN (1) | CN201178323Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178587A (en) * | 2013-04-17 | 2013-06-26 | 大唐洛阳首阳山发电有限责任公司 | Magnetizing power source for magnetic defect detector |
| CN103647322A (en) * | 2013-12-16 | 2014-03-19 | 国家电网公司 | Portable mobile power source |
-
2008
- 2008-04-09 CN CNU2008200856835U patent/CN201178323Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178587A (en) * | 2013-04-17 | 2013-06-26 | 大唐洛阳首阳山发电有限责任公司 | Magnetizing power source for magnetic defect detector |
| CN103647322A (en) * | 2013-12-16 | 2014-03-19 | 国家电网公司 | Portable mobile power source |
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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: 20090107 |