CN207398909U - A kind of intelligent power supply equipment - Google Patents
A kind of intelligent power supply equipment Download PDFInfo
- Publication number
- CN207398909U CN207398909U CN201721182865.XU CN201721182865U CN207398909U CN 207398909 U CN207398909 U CN 207398909U CN 201721182865 U CN201721182865 U CN 201721182865U CN 207398909 U CN207398909 U CN 207398909U
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- lithium battery
- solar panel
- battery
- unit
- power supply
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
Abstract
The utility model discloses a kind of intelligent power supply equipment, the intelligent power supply equipment includes solar panel, charging control unit, lithium battery, power management unit and DC conversion unit, charging control unit is connected respectively with solar panel and lithium battery, the charging control unit is by the energy stores being collected into lithium battery, power management unit is connected respectively with lithium battery and DC conversion unit, solar panel selects the solar panel of 80mm × 45mm, output voltage is 5.5V during the solar panel peak power output, electric current is 150mA, transfer efficiency is 16%, the capacity that lithium battery could be used without memory effect is 2000mAh, operating voltage is the lithium battery of 3.7V.System that employs the charge control technology of highly effective and safe, the DC DC conversion circuits of unique battery voltage supervisory circuit and low-power consumption.By experimental verification, the sensor node power consumption dynamic adjustment section performance based on this sun-generated electric power is good, and life cycle dramatically increases.The system can be applied to the node of various outdoor monitorings, such as environmental monitoring, precision agriculture, forest fire protection.
Description
Technical field
The utility model is related to lighting technical field more particularly to a kind of intelligent power supply equipment.
Background technology
Power supply is the important component of embedded system, especially for the wireless sensor network node of field arrangement
For, the laying difficulty of supply line is larger, and using battery powered when needs periodic replacement battery, adds to a certain extent
The cost of system maintenance.The power supply that solar electric power supply system not only solves the network node of field long-time unsupervised is asked
Topic, but also there are lasting power supply, environmental protection and energy saving and convenient for safeguarding, have a good application prospect.
The key issue of solar electric power supply system design is to be charged by solar panel to lithium battery, is needed simultaneously
Charging voltage and charging current are detected in real time, avoid causing lithium battery permanent damage when overcharging；In addition also need to design
Lithium battery discharge protection circuit monitors discharge voltage, prevents overdischarge from lithium battery being caused to damage in real time.It is solar powered
System is mainly made of solar panel, rechargeable lithium battery, charge controller and discharge protection circuit.Due to solar-electricity
The output voltage of pond plate is unstable, and traditional solar electric power supply system often because charging and discharging lithium battery management is unreasonable, causes
Lithium battery service life greatly shortens.This has become urgent problem.
Utility model content
The utility model proposes one kind, which can manage the charging process of lithium battery and carry out effective energy automatically
Amount storage, by avoiding lithium battery over-discharge to the monitoring of cell voltage, to achieve the purpose that extend service life of lithium battery.In addition
Since voltage needed for zigbee wireless sensor network nodes is 3.3V, and the operating voltage of lithium battery is generally in 3.6~4.2V
(regular picture voltage is 3.7V, and voltage when fully charged is 4.2V), so DC-DC conversion chips is needed to generate required work
Make voltage.
Technical solution is as follows used by the utility model：
A kind of intelligent power supply equipment, the intelligent power supply equipment include solar panel, charging control unit, lithium battery,
Power management unit and DC conversion unit, it is characterised in that：
Charging control unit is connected respectively with solar panel and lithium battery, the energy which will be collected into
Amount is stored in lithium battery, and power management unit is connected respectively with lithium battery and DC conversion unit；
Solar panel selects the solar panel of 80mm × 45mm, and output voltage is during the solar panel peak power output
5.5V, electric current 150mA, transfer efficiency 16%；
The lithium battery could be used without the capacity of memory effect as 2000mAh, and operating voltage is the lithium battery of 3.7V；
The charging control unit uses the intelligent charge control chip LTC4070 towards lithium ion battery；
Wherein described power management unit includes battery threshold setting unit and battery voltage measuring unit.
Preferably, lithium battery electric discharge door is formed using chip MAX680 and MAX8211 in the battery threshold setting unit
Limit sets circuit.
Preferably, the battery voltage measuring unit uses voltage reference chip LM4041.
Preferably, the DC conversion unit uses chip LTC3537.
The technical solution of the utility model, which can be obtained advantageous effect, to be included：System that employs the chargings of highly effective and safe
The DC-DC conversion circuits of control technology, unique battery voltage supervisory circuit, and low-power consumption.By experimental verification, based on this
The sensor node power consumption dynamic adjustment section performance of sun-generated electric power is good, and life cycle dramatically increases.The system can be applied to respectively
The node of the outdoor monitoring of kind, such as environmental monitoring, precision agriculture, forest fire protection.
Description of the drawings
Fig. 1 is the theory of constitution figure of the intelligent power supply equipment；
Fig. 2 is the circuit diagram of charging control unit；
Fig. 3 is the circuit diagram of battery threshold setting unit；
Fig. 4 is the circuit diagram of battery voltage measuring unit；
Fig. 5 is the circuit diagram of DC conversion unit.
Specific embodiment
In order to better illustrate the utility model, in conjunction with specific embodiment and Figure of description technical solution is made into
The explanation of one step.Although having recorded these specific embodiments in embodiment, so it is not limited to the utility model, appoints
What those of ordinary skill in the art, without departing from the spirit and scope of the utility model, when can make a little
It changes and retouches, therefore the scope of protection of the utility model is when subject to those as defined in claim.
The theory of constitution figure of the intelligent power supply equipment is as shown in Figure 1.The intelligent power supply equipment includes solar panel, fills
Electric control unit, lithium battery, power management unit and DC conversion unit, charging control unit respectively with solar panel
Connected with lithium battery, the charging control unit by the energy stores being collected into lithium battery, power management unit respectively with lithium
Battery is connected with DC conversion unit；Solar panel selects the solar panel of 80mm × 45mm, the solar panel maximum work output
During rate output voltage be 5.5V, electric current 150mA, transfer efficiency 16%；The lithium battery could be used without the appearance of memory effect
It measures as 2000mAh, operating voltage is the lithium battery of 3.7V；The charging control unit uses the intelligence towards lithium ion battery to fill
Electric control chip LTC4070；Wherein described power management unit includes battery threshold setting unit and battery voltage measuring unit.
In the electric power system, the energy that solar panel generates is stored in by charging control unit in lithium battery,
Charge protection is provided to lithium battery simultaneously, prevents from overcharging；Its terminal voltage can continuously decrease during due to battery discharge, it is therefore desirable to supply
Electric administrative unit is monitored discharge voltage, and discharge circuit is cut off when cell voltage declines to a certain extent, avoids lithium electric
Pond overdischarge.Since the energy content of battery should be consumed as few as possible, it is necessary to improve the transfer efficiency of power supply, therefore devise a tool
There is efficient DC conversion unit to provide stable voltage for the load on node.
The design of the intelligent power supply equipment unit circuit is mainly using the form of the additional a small amount of capacitance resistance wares of integrated IC
It realizes.The thinking of system design is：Then estimating system total power consumption first selects suitable lithium battery, and then according to lithium battery
Capacity select required solar panel；According to the charging voltage of solar panel and lithium battery, charging current etc.
Parameter can select suitable Charge Management IC to design charging control circuit；Finally according to lithium battery output voltage and
Operating voltage needed for zigbee wireless sensor network nodes designs suitable DC-DC conversion circuit.
The circuit diagram of charging control unit is as shown in Figure 2.Charging control unit is connected to solar panel and lithium
Battery, major function are that the energy efficient that will be collected into is stored in lithium battery.The charging control unit is using icepro Li Erte
The intelligent charge that company (Linear Tech2nology Corporation) is released towards lithium ion battery controls chip
LTC4070.The device is with the operating current of its 450nA, with former non-serviceable very low current, discontinuously or trickle charge,
It is charged and is protected to battery.The function of the device is highly suitable for continuous and interrupted, low-power charge power supply application.
LTC4070 is set with pin optional 4.0V, 4.1V or 4.2V, and the battery floating voltage of 1% accuracy allows user excellent
Electrochemical cell capacity and the balance between the service life.
Independent low battery capacity and high battery capacity supervision state output show that battery has discharged or fully charged.In addition
One realizes the disconnected function of lock with the external PFET of load in series, low battery electric quantity state output, which makes system automatically
Load and battery disconnecting, to protect the battery against deep discharge.In order to subtract when solar panel does not charge to lithium battery
Few L TC4070 energy expenditures addition triode Q1 isolates LTC4070 with lithium battery when Q1 base voltages decline.Normal
Most of electric current flows to lithium battery by Q1 under charge mode.When VCC reaches the floating-point voltage that ADJ is set, LTC4070 shuntings
The lasting reduction battery charge of the electric current of bc knots is up to 0 in Q1, and Q1 enters saturation state.
If thermistor T rise floating-point voltages reduce, L TC4070 will shunt more electric currents, and Q1 is forced into reverse-biased
State declines until cell voltage.ADJ pins are 4.0V when being connected to ground, are when being connected to VCC for setting floating-point voltage
4.2V is 4.1V when hanging.LBO draws high D1 and lights when lithium battery voltage is less than 3.2V, after lithium battery charging saturation, HBO
It draws high, D2 is lighted.
The circuit diagram of battery threshold setting unit by MAX680 and the MAX8211 lithium battery formed as shown in figure 3, put
Electric switch limit sets circuit.In the circuit, when lithium battery voltage drops to the threshold voltage determined by R1 and R5,
MAX8211 will end the supply voltage of MAX680, be finally closed IRF541 and disconnect supplying cell and load
Circuit.
The circuit diagram of battery voltage measuring unit as shown in figure 4, in order to performing effective power management, it is necessary to
Understand the storage situation of the energy content of battery, and according to mission requirements and self-energy state adjustment working condition and communication strategy.If
Using LM4041 voltage reference chips in meter, there is its terminal voltage of microprocessor samples.U4 is LM404121.2, which is micro- work(
The accurate voltage-stabiliser tube of consumption.
Since MCU and voltage needed for sensor are inconsistent, and the supply voltage of lithium battery is 3.7~4.2V, this is just needed
Carry out DC-DC conversions.The LTC3537 chips of Linear Tech are selected in this programme.LTC3537 has the function of integrated output disconnecting
2.2MHz, current-mode synchronous boost type DC/DC converters with LDO.600mA switches inside the boosting type converter of the device
The output voltage of up to 5.25V can be provided from the 0.68V (being 0.5V during work) when starting to 5V input voltage ranges, it is very suitable
For lithium ion/polymer or single-unit/more piece alkalescence/ni-mh metal battery application.The schematic diagram of DC conversion unit such as Fig. 5 institutes
Show.
The scope of protection of the utility model is not limited to the above embodiments, it is clear that those skilled in the art can be right
The present invention carries out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to this reality
In the range of new claim and its equivalent technologies, then the intention of the utility model also comprising these changes and deforms
It is interior.
Claims (4)
1. a kind of intelligent power supply equipment, which includes solar panel, charging control unit, lithium battery, confession
Electric administrative unit and DC conversion unit, it is characterised in that：
Charging control unit is connected respectively with solar panel and lithium battery, which deposits the energy being collected into
In lithium battery, power management unit is connected respectively with lithium battery and DC conversion unit for storage；
Solar panel selects the solar panel of 80mm × 45mm, and output voltage is 5.5V during the solar panel peak power output,
Electric current is 150mA, transfer efficiency 16%；
The lithium battery could be used without the capacity of memory effect as 2000mAh, and operating voltage is the lithium battery of 3.7V；
The charging control unit uses the intelligent charge control chip LTC4070 towards lithium ion battery；
Wherein described power management unit includes battery threshold setting unit and battery voltage measuring unit.
2. intelligent power supply equipment according to claim 1, it is characterised in that：
Lithium battery electric discharge thresholding is formed using chip MAX680 and MAX8211 in the battery threshold setting unit, circuit is set.
3. intelligent power supply equipment according to claim 1, it is characterised in that：
The battery voltage measuring unit uses voltage reference chip LM4041.
4. intelligent power supply equipment according to claim 1, it is characterised in that：
The DC conversion unit uses chip LTC3537.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721182865.XU CN207398909U (en) | 2017-09-14 | 2017-09-14 | A kind of intelligent power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721182865.XU CN207398909U (en) | 2017-09-14 | 2017-09-14 | A kind of intelligent power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207398909U true CN207398909U (en) | 2018-05-22 |
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ID=62417316
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721182865.XU Active CN207398909U (en) | 2017-09-14 | 2017-09-14 | A kind of intelligent power supply equipment |
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| Country | Link |
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| CN (1) | CN207398909U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182080A (en) * | 2019-06-04 | 2019-08-30 | 深圳市上善盛世科技有限公司 | A kind of solar energy changes electric cabinet |
| CN111641236A (en) * | 2020-05-27 | 2020-09-08 | 上海电享信息科技有限公司 | Dynamic threshold power battery charging voltage state judgment method based on big data AI |
-
2017
- 2017-09-14 CN CN201721182865.XU patent/CN207398909U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110182080A (en) * | 2019-06-04 | 2019-08-30 | 深圳市上善盛世科技有限公司 | A kind of solar energy changes electric cabinet |
| CN111641236A (en) * | 2020-05-27 | 2020-09-08 | 上海电享信息科技有限公司 | Dynamic threshold power battery charging voltage state judgment method based on big data AI |
| CN111641236B (en) * | 2020-05-27 | 2023-04-14 | 上海电享信息科技有限公司 | Dynamic threshold power battery charging voltage state judgment method based on big data AI |
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