CN107222014A - A kind of solar charging circuit of lithium battery - Google Patents

A kind of solar charging circuit of lithium battery Download PDF

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Publication number
CN107222014A
CN107222014A CN201710600707.XA CN201710600707A CN107222014A CN 107222014 A CN107222014 A CN 107222014A CN 201710600707 A CN201710600707 A CN 201710600707A CN 107222014 A CN107222014 A CN 107222014A
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CN
China
Prior art keywords
circuit
lithium battery
pin
module
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710600707.XA
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Chinese (zh)
Other versions
CN107222014B (en
Inventor
朱亮华
薛稼祥
陈永煌
沙幸威
吴竖
李元云
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DONGGUAN CITY JUDA ELECTRONIC Co Ltd
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DONGGUAN CITY JUDA ELECTRONIC Co Ltd
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Priority to CN201710600707.XA priority Critical patent/CN107222014B/en
Publication of CN107222014A publication Critical patent/CN107222014A/en
Application granted granted Critical
Publication of CN107222014B publication Critical patent/CN107222014B/en
Active legal-status Critical Current
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302Overcharge protection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304Overcurrent protection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306Overdischarge protection

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The present invention relates to the technical field of battery charging, a kind of solar charging circuit of lithium battery is referred in particular to, it includes:Charging module is depressured, for the output voltage of solar panels to be down into lithium cell charging voltage;Sampling module, output voltage, output current and lithium battery temperature for monitoring solar charging circuit;Dsp controller:For collecting sampled signal that sampling module sends and sending control signal and break-make for controlling decompression charging module;Protection module, for collecting the control signal that dsp controller is sent;The second protection circuit for protecting lithium battery is additionally provided between the decompression charging module and lithium battery.The present invention realizes the function of solar charging of lithium battery, and its is safe to use, and service life is long, is charged without artificial, and energy-conserving and environment-protective.

Description

A kind of solar charging circuit of lithium battery
Technical field
The present invention relates to the technical field of battery charging, a kind of solar charging circuit of lithium battery is referred in particular to.
Background technology
Shared bicycle provides bicycle bicycle shared service, is to share a kind of economic new normality.Must on shared bicycle car GPS positioning system and the communication module communicated with general headquarters must be installed.The operation of bicycle is influenceed by seasonal variations, weather conditions etc. Than larger, whatsoever weather condition, no matter when and where, it is logical that the battery of shared bicycle will provide positioning and general headquarters for bicycle The energy supply of news, so shared bicycle lithium ion battery requires most of higher but current lithium battery or using artificial Charge, and the lithium battery of shared bicycle is difficult to safeguard, if all shared bicycle can cause substantial amounts of manpower using manually charging Material resources are wasted, and it wastes electric power resource, it is difficult to safeguard the safety and reliability of lithium battery.
The content of the invention
The present invention provides a kind of solar charging circuit of lithium battery for problem of the prior art, realizes lithium battery too Positive energy charge function, its is safe to use, and service life is long, is charged without artificial, and energy-conserving and environment-protective.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that:
A kind of solar charging circuit for lithium battery that the present invention is provided, includes:
Charging module is depressured, for the output voltage of solar panels to be down into lithium cell charging voltage;
Sampling module, output voltage, output current and lithium battery temperature for monitoring solar charging circuit;
Dsp controller:For collecting sampled signal that sampling module sends and sending control signal and for controlling decompression charging The break-make of module;
Protection module, for collecting the control signal that dsp controller is sent;
The second protection circuit for protecting lithium battery is additionally provided between the decompression charging module and lithium battery.
Wherein, the decompression charging module includes metal-oxide-semiconductor Q4, and the grid of the metal-oxide-semiconductor Q4 is connected with dsp controller.
Wherein, the lithium battery is connected with temperature thermistor NTC, the sampling module include voltage sampling circuit, Current sampling circuit and temperature sampling circuit;
The protection module includes super-charge super-discharge protection circuit, current foldback circuit and thermal-shutdown circuit.
Wherein, the voltage sampling circuit is connected by resistance R14 come the input with the super-charge super-discharge protection circuit; The current sampling circuit is connected by resistance R26 come the input with the current foldback circuit;The temperature sampling circuit It is connected by resistance R71 come the input with the thermal-shutdown circuit.
Wherein, the dsp controller is chip TMS320F28035, be provided with the dsp controller pin GPIO22, Pin GPIO32, pin ADCINA3, pin ADCINA1 and pin EPWM7A, the metal-oxide-semiconductor Q4 grid and pin EPWM7A Connection;The input of the voltage sampling circuit is connected with lithium battery, the output end and pin of the voltage sampling circuit ADCINA1 connections, the output end of the super-charge super-discharge protection circuit is connected with pin GPIO22;The current sampling circuit it is defeated Enter end to be connected with lithium battery, the output end of the current sampling circuit is connected with pin ADCINA3, the current foldback circuit Output end is connected with pin GPIO32.
Wherein, the second protection circuit includes control chip S8261, the control chip S8261 and includes pin VDD and pin VSS, the pin VDD and lithium battery positive pole connection, the negative pole connection of the pin VSS and lithium battery.
Beneficial effects of the present invention:
A kind of solar charging circuit for lithium battery that the present invention is provided, lithium battery is by being depressured charging module by solar panels Input voltage is down to the charging voltage of lithium battery, is realized by the sampling module in dsp controller to solar charging circuit Output voltage, output current and lithium battery temperature are monitored, and dsp controller is triggered by protection module to control decompression The break-make of charging module and then realize is protected to lithium battery, the safety and reliability of protection lithium battery;Further, lead to Cross with the second protection circuit of protection, Cross prevention and overcurrent protection function is overcharged to protect lithium battery and decompression charging mould The security of block, can prevent the protection module of dsp controller from failing, second protection circuit can play the work of second protection With, it is ensured that the safety and reliability of lithium battery;The present invention realizes the function of solar charging of lithium battery, its safety in utilization Height, service life is long, is charged without artificial, and energy-conserving and environment-protective.
Brief description of the drawings
Fig. 1 is a kind of construction module figure of the solar charging circuit of lithium battery of the present invention.
Fig. 2 is the circuit diagram for being depressured charging module of the invention.
Fig. 3 is the circuit diagram of the dsp controller of the present invention.
Fig. 4 is the circuit diagram of the second protection circuit of the present invention.
Fig. 5 is the voltage sampling circuit of the present invention and the circuit diagram of super-charge super-discharge protection circuit.
Fig. 6 is the current sampling circuit of the present invention and the circuit diagram of current foldback circuit.
Fig. 7 is the temperature sampling circuit of the present invention and the circuit diagram of thermal-shutdown circuit.
Include in references of the Fig. 1 into Fig. 7:
1-decompression charging module 2-dsp controller, 3-sampling module
4-protection module, 5-second protection, 6-voltage sampling circuit of circuit
7-temperature sampling circuit, 8-super-charge super-discharge, 9-current foldback circuit of protection circuit
10-thermal-shutdown circuit, 11-current sampling circuit.
Embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to embodiment and accompanying drawing It is bright, the content that embodiment is referred to not limitation of the invention.The present invention is described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, Figure 2, a kind of Fig. 3, solar charging circuit of lithium battery, includes:Charging module is depressured, for will too The output voltage of positive energy plate is down to lithium cell charging voltage;
Sampling module, output voltage, output current and lithium battery temperature for monitoring solar charging circuit;DSP is controlled Device:For collecting sampled signal that sampling module sends and sending control signal and break-make for controlling decompression charging module; Protection module, for collecting the control signal that dsp controller is sent;It is additionally provided between the decompression charging module and lithium battery Second protection circuit for protecting lithium battery.Specifically, lithium battery is by being depressured charging module 1 by the input electricity of solar panels Pressure drop realizes the output to solar charging circuit by the sampling module 3 in dsp controller 2 to the charging voltage of lithium battery Voltage, output current and lithium battery temperature are monitored, and the collection signal of sampling module 3 is sent on dsp controller 2, DSP Controller 2 according to collection signal send a control signal in protection module 4, triggered by protection module 4 dsp controller 2 come Control is depressured the break-make of charging module and then realized to being protected to lithium battery, protects the safety and reliability of lithium battery; By protecting lithium battery and decompression to fill with the second protection circuit 5 of protection, Cross prevention and overcurrent protection function is overcharged The security of electric module 1, can prevent the protection module 4 of dsp controller 2 from failing and causing lithium battery to damage, second protection electricity Road 5 can play the effect of second protection, it is ensured that the safety and reliability of lithium battery;The present invention realizes the solar energy of lithium battery Charge function, its is safe to use, and service life is long, is charged without artificial, and energy-conserving and environment-protective;The present invention is applied to a variety of Situation about being charged to lithium battery is needed, such as the lithium battery in shared bicycle, the lithium battery of outdoor lamp.
Further, the decompression charging module 1 includes metal-oxide-semiconductor Q4, the metal-oxide-semiconductor Q4 grid and dsp controller 2 Connection.Specifically, the dsp controller 2 controls to be depressured the break-make of charging module 1 by controlling metal-oxide-semiconductor Q4 break-make.
Such as Fig. 5, Fig. 6, Fig. 7, a kind of solar charging circuit of lithium battery described in the present embodiment, the negative pole of lithium battery are defeated Go out end and be connected with temperature thermistor NTC, the sampling module 3 includes voltage sampling circuit 6, current sampling circuit 11 and temperature Spend sample circuit 7;The protection module 4 includes super-charge super-discharge protection circuit 8, current foldback circuit 9 and thermal-shutdown circuit 10;Specifically, charging voltage, the charging current of the voltage sampling circuit 6, current sampling circuit 11 respectively to voltage reduction module are entered Collection signal is simultaneously sent and sends control signals to protection module 4 again into dsp controller 2 by row sampling, the temperature sampling Collection signal is simultaneously sent into dsp controller 2 and again sends control signal by the collecting temperature thermistor NTC of circuit 7 temperature To protection module 4, pass through 10 pairs of the super-charge super-discharge protection circuit 8 of protection module 4, current foldback circuit 9 and thermal-shutdown circuit Decompression charging module 1 and lithium battery are protected;
The voltage sampling circuit 6 is connected by resistance R14 with the input of the super-charge super-discharge protection circuit 8;The electric current Sample circuit 11 is connected by resistance R26 with the input of the current foldback circuit 9;The temperature sampling resistance passes through resistance R71 is connected with the input of the thermal-shutdown circuit 10.Specifically, the resistance R14, resistance R26 and resistance R71 play negative The effect of load.
Specifically, protection voltage is overcharged when the charging voltage that dsp controller 2 is sampled by voltage sampling circuit 6 reaches During 4.25V, the control signal received is fed back to dsp controller 2 by protection module 4, and dsp controller 2, which is received, overcharges protection Signal, dsp controller 2, which stops output pwm signal, closes metal-oxide-semiconductor Q4, and then disconnects the charging circuit of decompression charging module 1; When the charging voltage that dsp controller 2 is sampled by voltage sampling circuit 6, which is less than, overcharges recovery voltage 4.15V, super-charge super-discharge Protection circuit 8 does not work, and is depressured the normal work of charging module 1;When dsp controller 2 by voltage sampling circuit 6 samples battery When voltage is less than 2.5V, dsp controller 2 receives Cross prevention signal, and dsp controller 2, which stops output pwm signal, makes metal-oxide-semiconductor Q4 is closed, and disconnects the charging circuit of decompression charging module 1;When dsp controller 2 by voltage sampling circuit 6 sample battery electricity When pressure is higher than 3V, over-discharge protection circuit does not work, and is depressured the normal work of charging module 1;
When dsp controller 2 by current sampling circuit 11 sample charging current it is too high when, dsp controller 2 receive excessively stream guarantor Signal is protected, in the presence of current foldback circuit 9, dsp controller 2, which stops output pwm signal, closes metal-oxide-semiconductor Q4, disconnects drop Press the charging circuit of charging module 1, protection decompression charging module 1 and battery;
When dsp controller 2 can detect NTC resistance information at any time by temperature sampling circuit 7, to judge that the temperature of battery becomes Change situation, if the temperature detected is too high, dsp controller 2 closes the metal-oxide-semiconductor Q4 of decompression charging module 1 drive signal, stops Only charge, while cutting off discharge loop, protect the safety of battery.
Such as Fig. 3, a kind of solar charging circuit of lithium battery described in the present embodiment, the dsp controller is chip Pin GPIO22, pin GPIO32, pin ADCINA3, pin are provided with TMS320F28035, the dsp controller ADCINA1 and pin EPWM7A, the grid of the metal-oxide-semiconductor Q4 is connected with pin EPWM7A;The input of the voltage sampling circuit End is connected with lithium battery, and the output end of the voltage sampling circuit is connected with pin ADCINA1, the super-charge super-discharge protection circuit Output end be connected with pin GPIO22;The input of the current sampling circuit is connected with lithium battery, the current sample electricity The output end on road is connected with pin ADCINA3, and the output end of the current foldback circuit is connected with pin GPIO32.
Such as Fig. 4, a kind of solar charging circuit of lithium battery described in the present embodiment, the second protection circuit 5 includes There are control chip S8261, the control chip S8261 to include pin VDD and pin VSS, the pin VDD's and lithium battery Positive pole is connected, the negative pole connection of the pin VSS and lithium battery.Specifically, the second protection circuit 5 by with control chip S8261 cooperation, included charging protection function, Cross prevention function and overcurrent protection function;Overcharged when charging voltage reaches When protecting voltage 4.25V, control chip S8261 output low level drive signals close the metal-oxide-semiconductor inside second protection circuit 5 It is disconnected, cutoff circuit;When charging voltage, which is less than, overcharges recovery voltage 4.15V, control chip S8261 output high level driving letters Number, reopen the metal-oxide-semiconductor inside second protection circuit 5, the process crosses charging protection function for second protection circuit 5.When When cell voltage is less than Cross prevention voltage 2.5V, control chip S8261 output low level drive signals make second protection circuit Metal-oxide-semiconductor shut-off in 5, cutoff circuit;When cell voltage, which was more than, puts recovery voltage 3V, the high electricity of control chip S8261 outputs Flat drive signal, reopens the metal-oxide-semiconductor in second protection circuit 5, and the process is the Cross prevention work(of second protection circuit 5 Energy;Wherein, PTC resettable fuses are accessed in second protection circuit 5, the fuse has overcurrent protection and automatic two kinds of recovery Function, its function occurs to prevent battery high-temperature from discharging with unsafe high current.
It is described above, only it is present pre-ferred embodiments, any formal limitation not is made to the present invention, although The present invention is disclosed as above with preferred embodiment, but is not limited to the present invention, any those skilled in the art, Do not depart from the range of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent change The equivalent embodiment of change, as long as being, without departing from technical solution of the present invention content, to refer to according to the technology of the present invention to above example Any simple modification, equivalent variations and the modification made, are belonged in the range of technical solution of the present invention.

Claims (6)

1. a kind of solar charging circuit of lithium battery, it is characterised in that include:
Charging module is depressured, for the output voltage of solar panels to be down into lithium cell charging voltage;
Sampling module, output voltage, output current and lithium battery temperature for monitoring solar charging circuit;
Dsp controller:For collecting sampled signal that sampling module sends and sending control signal and for controlling decompression charging The break-make of module;
Protection module, for collecting the control signal that dsp controller is sent;
The second protection circuit for protecting lithium battery is additionally provided between the decompression charging module and lithium battery.
2. a kind of solar charging circuit of lithium battery according to claim 1, it is characterised in that:The decompression charging mould Block includes metal-oxide-semiconductor Q4, and the grid of the metal-oxide-semiconductor Q4 is connected with dsp controller.
3. a kind of solar charging circuit of lithium battery according to claim 2, it is characterised in that:The lithium battery connection There is temperature thermistor NTC, the sampling module includes voltage sampling circuit, current sampling circuit and temperature sampling circuit;
The protection module includes super-charge super-discharge protection circuit, current foldback circuit and thermal-shutdown circuit.
4. a kind of solar charging circuit of lithium battery according to claim 3, it is characterised in that:The voltage sample electricity Road is connected by resistance R14 come the input with the super-charge super-discharge protection circuit;The current sampling circuit passes through resistance R26 To be connected with the input of the current foldback circuit;The temperature sampling circuit by resistance R71 come with the overheat protector The input connection of circuit.
5. a kind of solar charging circuit of lithium battery according to claim 3, it is characterised in that:The dsp controller For chip TMS320F28035, pin GPIO22, pin GPIO32, pin ADCINA3, pipe are provided with the dsp controller Pin ADCINA1 and pin EPWM7A, the grid of the metal-oxide-semiconductor Q4 is connected with pin EPWM7A;The voltage sampling circuit it is defeated Enter end to be connected with lithium battery, the output end of the voltage sampling circuit is connected with pin ADCINA1, the super-charge super-discharge protection electricity The output end on road is connected with pin GPIO22;The input of the current sampling circuit is connected with lithium battery, the current sample The output end of circuit is connected with pin ADCINA3, and the output end of the current foldback circuit is connected with pin GPIO32.
6. a kind of solar charging circuit of lithium battery according to claim 1, it is characterised in that:The second protection electricity Road includes control chip S8261, the control chip S8261 and includes pin VDD and pin VSS, the pin VDD and lithium The positive pole connection of battery, the negative pole connection of the pin VSS and lithium battery.
CN201710600707.XA 2017-07-21 2017-07-21 Solar charging circuit of lithium battery Active CN107222014B (en)

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Application Number Priority Date Filing Date Title
CN201710600707.XA CN107222014B (en) 2017-07-21 2017-07-21 Solar charging circuit of lithium battery

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CN107222014B CN107222014B (en) 2024-02-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109391010A (en) * 2018-11-30 2019-02-26 深圳源创智能照明有限公司 A kind of lithium battery high temperature automatic protection plate
WO2019205393A1 (en) * 2018-04-22 2019-10-31 北京汉能光伏投资有限公司 Charging control system, solar energy charging device, umbrella junction box and umbrella
CN110581589A (en) * 2018-06-07 2019-12-17 北京汉能光伏投资有限公司 solar unit circuit, solar device, connector and solar system

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Publication number Priority date Publication date Assignee Title
WO2019205393A1 (en) * 2018-04-22 2019-10-31 北京汉能光伏投资有限公司 Charging control system, solar energy charging device, umbrella junction box and umbrella
CN110581589A (en) * 2018-06-07 2019-12-17 北京汉能光伏投资有限公司 solar unit circuit, solar device, connector and solar system
CN109391010A (en) * 2018-11-30 2019-02-26 深圳源创智能照明有限公司 A kind of lithium battery high temperature automatic protection plate

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Inventor after: Zhu Lianghua

Inventor after: Xue Jiaxiang

Inventor after: Chen Yonghuang

Inventor after: Sha Xingwei

Inventor after: Wu Shu

Inventor after: Li Yuanyun

Inventor before: Zhu Lianghua

Inventor before: Xue Jiaxiang

Inventor before: Chen Yonghuang

Inventor before: Sha Xingwei

Inventor before: Wu Shu

Inventor before: Li Yuanyun

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