CN203554041U - Solar-energy lithium-battery charger - Google Patents
Solar-energy lithium-battery charger Download PDFInfo
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- CN203554041U CN203554041U CN201320662250.2U CN201320662250U CN203554041U CN 203554041 U CN203554041 U CN 203554041U CN 201320662250 U CN201320662250 U CN 201320662250U CN 203554041 U CN203554041 U CN 203554041U
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Abstract
The utility model provides a solar-energy lithium-battery charger which includes a power-supply main circuit, a voltage detecting circuit, a current detecting circuit, an MPPT adjustment circuit, a one-chip-microcomputer control circuit, a lithium-battery charging circuit, a switching power supply voltage-stabilizing circuit and a lithium-battery charging-voltage selecting circuit. The voltage of an input end of the lithium-battery charging-voltage selecting circuit is supplied by the switching power supply voltage-stabilizing circuit. The lithium-battery charging-voltage selecting circuit is connected with a one-chip microcomputer of the one-chip-microcomputer control circuit through a knob switch and an output end of a single operational amplifier. The knob switch is capable of realizing selection of a 30V voltage point and a 24V voltage point. The portable lithium-battery charger is capable of selecting two gears of 12V and 24V conveniently and charging devices with lithium batteries, such as communication devices, audiovisual devices, electronic devices, miniature projecting devices and detection devices and the like so that outdoor activities of people are facilitated.
Description
Technical field
The utility model relates to charger, especially solar energy lithium battery charger.
Background technology
Solar charger is solar energy to be converted to electric energy be stored in storage battery the inside later, and storage battery can be any type of electrical storage device, generally by solar photocell, and storage battery, three part compositions of voltage regulation component.Storage battery is mainly lead-acid battery, lithium battery, Ni-MH battery, and the use of lithium battery is in the majority, and the load of solar energy lithium battery charger can be the digital products such as mobile phone, and load is multifarious,
Lithium battery is supported the solar charger of power supply Adjustable device at present, but to support 5v, it is in the majority that 9v is adjustable.
Summary of the invention
For addressing the above problem, the utility model provides a kind of solar energy lithium battery charger, comprises electric power main circuit, voltage detecting circuit, current detection circuit, MPPT regulating circuit, single chip machine controlling circuit, lithium battery charging circuit, switch power voltage-stabilizing circuit, the lithium cell charging voltage circuit of recruiting; Wherein, electric power main circuit is solar panels, and electric power main circuit output connects respectively the input of current detection circuit, the input of voltage detecting circuit, the input of switch power voltage-stabilizing circuit, the input of lithium battery charging circuit; Described electric power main circuit input connects MPPT regulating circuit output; The input of described single chip machine controlling circuit connects respectively the output of current detection circuit, the output of voltage detecting circuit, and the output of described single chip machine controlling circuit connects MPPT regulating circuit input; Described switch power voltage-stabilizing circuit output connects respectively lithium cell charging voltage recruit circuit input end, single chip machine controlling circuit input, MPPT regulating circuit input, and the described lithium cell charging voltage circuit output end of recruiting connects single chip machine controlling circuit input.
Further, the single-chip microcomputer of single chip machine controlling circuit is the single-chip microcomputer that can realize MPPT control function.
Further, described lithium battery charging circuit comprises lithium cell charging managing chip, metal-oxide-semiconductor, thermistor, parallel voltage-stabilizing diode, some resistance.
Further, the lithium cell charging voltage circuit input end voltage of recruiting is provided by switch power voltage-stabilizing circuit, the described lithium cell charging voltage circuit of recruiting is connected with the single-chip microcomputer of single chip machine controlling circuit with single operational amplifier output terminal by rotary switch, and described rotary switch can be realized the selection of 30V electrical voltage point and 24V electrical voltage point.
Further, described switch power voltage-stabilizing circuit, comprises switch voltage-stabilizing integrated circuit (IC) chip, three-terminal regulator block.
The beneficial effects of the utility model are: the utility model is that 12V and two grades of optional facilities of 24V can be taken lithium battery charger, for the band lithium battery equipment such as some communication apparatus, audio-visual equipment, electronic equipment, micro projection equipment, detecting devices charge, it is movable to be out of doors convenient for people to.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises electric power main circuit, voltage detecting circuit, current detection circuit, MPPT regulating circuit, single chip machine controlling circuit, lithium battery charging circuit, switch power voltage-stabilizing circuit, the lithium cell charging voltage circuit of recruiting; Wherein, electric power main circuit power supply is from solar panels, and electric power main circuit output connects respectively the input of current detection circuit, the input of voltage detecting circuit, the input of switch power voltage-stabilizing circuit, the input of lithium battery charging circuit; Described electric power main circuit input connects MPPT regulating circuit output; The input of described single chip machine controlling circuit connects respectively the output of current detection circuit, the output of voltage detecting circuit, and the output of described single chip machine controlling circuit connects MPPT regulating circuit input; Described switch power voltage-stabilizing circuit output connects respectively lithium cell charging voltage recruit circuit input end, single chip machine controlling circuit input, MPPT regulating circuit input, and the described lithium cell charging voltage circuit output end of recruiting connects single chip machine controlling circuit input.
The lithium cell charging voltage circuit input end voltage of recruiting is provided by switch power voltage-stabilizing circuit, by rotary switch, is connected with single-chip microcomputer with single operational amplifier output.Described rotary switch is 30V electrical voltage point when a gear, and the matching voltage of exporting to lithium cell charging is 24V, and two gears are adjustable, and three gears are 24V electrical voltage point, and the matching voltage of exporting to lithium cell charging is 12V.
Described lithium battery charging circuit, by the effect of lithium cell charging managing chip, adopts the charging of pwm pulse width modulation mode, has trickle, constant current, three kinds of charge modes of constant voltage, charging temperature is controlled simultaneously.
Described single chip machine controlling circuit mainly comprises with the single-chip microcomputer of realizing MPPT control function.
With example more specifically, the utility model is described below.
Described single-chip microcomputer is STC12 single-chip microcomputer.
Described voltage detecting circuit, current detection circuit mainly comprise single operational amplifier (J4, J5, J6) and filter circuit.Wherein voltage detecting circuit comprises TEST-V1 voltage detecting circuit and TEST-V2 voltage detecting circuit.
Described MPPT regulating circuit comprises MPPT1 regulating circuit and MPPT2 regulating circuit, comprising having single operational amplifier (J2, J3), pull-up resistor (R32, R33).
Single-chip microcomputer P1.0/ADC0 mouth is connected with TEST-I current detection circuit output port.Its current detection circuit input, from electric power main circuit starting resistance RS two ends, is connected with single-chip microcomputer by the mono-operational amplifier output of J4.
P1.1/ADC1 mouth, the P1.2/ADC2 mouth of single-chip microcomputer are connected with voltage detecting circuit output port.Its TEST-V1, TEST-V2 voltage detecting circuit input be respectively from the source terminal of electric power main circuit Q1, two MOSFET of Q2, then by the mono-operational amplifier output of J5, J6, be connected with single-chip microcomputer respectively.
The P1.3/ADC3 mouth of single-chip microcomputer and the lithium cell charging voltage circuit output end of recruiting is connected.Its lithium cell charging voltage circuit input end voltage of recruiting is provided by switch power voltage-stabilizing circuit, by the mono-operational amplifier output of rotary switch S1 and J1, is connected with single-chip microcomputer.Switch S 1 is 30V electrical voltage point when a gear, and the matching voltage of exporting to the charging of power battery is 24V, and two gears are adjustable, and three gears are 24V electrical voltage point, and the matching voltage of exporting to the charging of power battery is 12V.
P3.7/PWM0, the P3.5/PWM1 port of single-chip microcomputer are connected with the mono-operational amplifier of J2, J3 with R30 by MPPT regulating circuit R28 respectively, the mono-operational amplifier output terminal of J2, J3 is to produce the enough voltage of large driven MOS pipe at output by pull-up resistor R32, R33(object), connect respectively R34, R35, its MPPT regulating circuit output is connected respectively at the Q1 of electric power main circuit, the grid of two MOSFET of Q2 again.Its Q1, Q2 play respectively maximum power adjusting, pressure stabilization function.The control to MPPT that this has passed through chip microcontroller.
Described lithium battery charging circuit mainly comprises lithium cell charging managing chip IC1, metal-oxide-semiconductor Q3, thermistor NTC, parallel voltage-stabilizing diode D4, resistance R 1～R19.
Lithium battery charging circuit provides voltage by electric power main circuit output, and by lithium cell charging managing chip, IC1 controls.Lithium cell charging managing chip decides charged state by detecting cell voltage state.When cell voltage is during lower than pre-charge voltage, lithium cell charging managing chip carries out precharge automatically; When cell voltage is higher than pre-charge voltage during lower than constant voltage charge electric current, lithium cell charging managing chip starts battery to carry out constant current charge, and charging current outside is adjustable; When cell voltage rises to constant voltage charge voltage above time, lithium cell charging managing chip enters constant voltage charge automatically; When charging current is less than charging saturation point stream, charging finishes.When the short circuit of battery current port, lithium cell charging managing chip reduces charging current, carries out short-circuit protection; In charging process, lithium cell charging managing chip, by the thermistor of inside battery, is controlled charging temperature, when battery temperature higher than set temperature time, stop charging; In voltage returns to temperature, proceed charging.
Described lithium cell charging managing chip PIN1(PWM rushes electric pulse delivery outlet) be connected with the grid of metal-oxide-semiconductor Q3, according to the switching time of the square wave control charging transistor of the signal output different duty of other sample port; PWM degree of regulation is 256 grades, low level charging, and high level stops charging.
The LED indication end of described lithium cell charging managing chip PIN2/RED and PIN14/GREEN, shows orange 1 second while powering on; The square wave of 0.5Hz is exported in RED indication end when trickle charge; When short circuit and excess temperature, export the square wave in a second; High level is exported in GREEN indication end when battery fills saturated and overvoltage, and indicator current fills saturated.
Described lithium cell charging managing chip PIN5 charging current sampling end, is magnitude of voltage by R15 by the current conversion by battery, then is connected to afterwards after filtering charging current sampling end.
Described lithium cell charging managing chip PIN6 fills full cut-off current reference data input.After battery inserts, charging current is converted to magnitude of voltage by R15 sampling resistor.When PIN5 end sample voltage value is less than this port, chip stops charging, and PIN1 end is closed, and RED holds output low level, and GREEN exports high level, and indication is full of.Saturation current value can be by adjusting R4 to tetra-divider resistances of R7 and R15.PIN1, PIN5, PIN6, PIN9, PIN10, PIN12, these 7 ports of PIN13, the three phases (trickle charge, constant current charge, constant voltage charge) to lithium cell charging has carried out important control.
Described lithium cell charging managing chip PIN7 temperature detection end.Detect the built-in thermistor NTC of battery; when battery temperature raises while making temperature detection terminal voltage lower than the reference data input of PIN8 temperature; the fixed pulse width that the output of PWM charging pulse output is very narrow; reduce charging current; carry out overheat protector; prevent the harm and the danger that battery are caused due to excess Temperature, overheat protector is controlled to the parameter of tetra-divider resistances of R7 and R13 and NTC by R4.
Affiliated lithium cell charging managing chip PIN13 detects cell voltage state, judges battery status: short circuit, under-voltage or overvoltage in conjunction with the signal of PIN12 port.
The utility model also comprises switch power voltage-stabilizing circuit, comprises U1 switch voltage-stabilizing integrated circuit (IC) chip LM2575T, U2 three-terminal regulator block LM7805.
Switch power voltage-stabilizing circuit input voltage is provided by electric power main circuit, by U1 switch voltage-stabilizing integrated circuit (IC) chip LM2575T generation+12V voltage, input voltage using+12V voltage as U2 three-terminal regulator block LM7805 again, generation+5V voltage, provides inside circuit required voltage with this.Output is connected with single chip machine controlling circuit, MPPT regulating circuit, the lithium cell charging voltage circuit of recruiting respectively.
The beneficial effects of the utility model are: the utility model is that 12V and two grades of optional facilities of 24V can be taken lithium battery charger, for the band lithium battery equipment such as some communication apparatus, audio-visual equipment, electronic equipment, micro projection equipment, detecting devices charge, it is movable to be out of doors convenient for people to.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. solar energy lithium battery charger, it is characterized in that, comprise electric power main circuit, voltage detecting circuit, current detection circuit, MPPT regulating circuit, single chip machine controlling circuit, lithium battery charging circuit, switch power voltage-stabilizing circuit, the lithium cell charging voltage circuit of recruiting; Wherein, electric power main circuit is solar panels, and electric power main circuit output connects respectively the input of current detection circuit, the input of voltage detecting circuit, the input of switch power voltage-stabilizing circuit, the input of lithium battery charging circuit; Described electric power main circuit input connects MPPT regulating circuit output; The input of described single chip machine controlling circuit connects respectively the output of current detection circuit, the output of voltage detecting circuit, and the output of described single chip machine controlling circuit connects MPPT regulating circuit input; Described switch power voltage-stabilizing circuit output connects respectively lithium cell charging voltage recruit circuit input end, single chip machine controlling circuit input, MPPT regulating circuit input, and the described lithium cell charging voltage circuit output end of recruiting connects single chip machine controlling circuit input.
2. solar energy lithium battery charger according to claim 1, is characterized in that, the single-chip microcomputer of single chip machine controlling circuit is the single-chip microcomputer that can realize MPPT control function.
3. solar energy lithium battery charger according to claim 1 and 2, is characterized in that, described lithium battery charging circuit comprises lithium cell charging managing chip, metal-oxide-semiconductor, thermistor, parallel voltage-stabilizing diode, some resistance.
4. solar energy lithium battery charger according to claim 3, it is characterized in that, the lithium cell charging voltage circuit input end voltage of recruiting is provided by switch power voltage-stabilizing circuit, the described lithium cell charging voltage circuit of recruiting is connected with the single-chip microcomputer of single chip machine controlling circuit with single operational amplifier output terminal by rotary switch, and described rotary switch can be realized the selection of 30V electrical voltage point and 24V electrical voltage point.
5. solar energy lithium battery charger according to claim 1, is characterized in that, described switch power voltage-stabilizing circuit comprises switch voltage-stabilizing integrated circuit (IC) chip, three-terminal regulator block.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662250.2U CN203554041U (en) | 2013-10-25 | 2013-10-25 | Solar-energy lithium-battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320662250.2U CN203554041U (en) | 2013-10-25 | 2013-10-25 | Solar-energy lithium-battery charger |
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| Publication Number | Publication Date |
|---|---|
| CN203554041U true CN203554041U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320662250.2U Expired - Fee Related CN203554041U (en) | 2013-10-25 | 2013-10-25 | Solar-energy lithium-battery charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821535A (en) * | 2021-01-07 | 2021-05-18 | 郑州利凌电子科技有限公司 | Solar charging management circuit based on single chip microcomputer |
-
2013
- 2013-10-25 CN CN201320662250.2U patent/CN203554041U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821535A (en) * | 2021-01-07 | 2021-05-18 | 郑州利凌电子科技有限公司 | Solar charging management circuit based on single chip microcomputer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140416 Termination date: 20171025 |