CN104578264A - Automatic load identification circuit of mobile power supply - Google Patents

Automatic load identification circuit of mobile power supply Download PDF

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Publication number
CN104578264A
CN104578264A CN201410810069.0A CN201410810069A CN104578264A CN 104578264 A CN104578264 A CN 104578264A CN 201410810069 A CN201410810069 A CN 201410810069A CN 104578264 A CN104578264 A CN 104578264A
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CN
China
Prior art keywords
circuit
power supply
mcu
main control
mobile power
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Application number
CN201410810069.0A
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Chinese (zh)
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CN104578264B (en
Inventor
钟义
贺乃瑞
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Dongguan Xingkaitai Electronic Technology Co Ltd
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Dongguan Xingkaitai Electronic Technology Co Ltd
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Classifications

    • H02J7/0077
    • 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
    • H02J7/0036Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits

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

Abstract

The invention discloses an automatic load identification circuit of a mobile power supply. The automatic load identification circuit comprises a main control unit (MCU), a battery cell protection board circuit connected with the MCU, a power supply circuit, a charge control circuit, a boost output circuit and an LED display lamp, wherein a sampling circuit comprising resistors R23 and R27 connected in parallel and a detection circuit comprising resistors R5 and R14 connected in series are arranged in the boost output circuit; a Test pin of the MCU is connected with a serial connection point of the resistors R5 and R14; an output power supply 5V+ of the boost output circuit is unidirectionally communicated with an anode B+ of a battery through a diode D1, and an anode and a cathode of the MCU are communicated with a cathode of the battery during a power-off period. The automatic load identification circuit can be used in daily life, the awkward situation that the carried mobile power supply cannot charge a Bluetooth headset and a smart bracelet is avoided, and the potential hazard caused by a fact that the mobile power supply is connected with a load all the time and cannot be automatically switched off also can be avoided.

Description

Portable power source automatic recognition of load circuit
Technical field
the present invention relates to portable power source, be specifically related to a kind ofly to carry out charging to small area analysis equipmentportable power source automatic recognition of load circuit.
Background technology
In the prior art, when the load current of portable power source is less than about 100mA, understand automatic shutdown, like this can not to small area analysis equipment charges such as bluetooth earphones, if plug small area analysis equipment charge, portable power source can disconnect automatically, is inconvenient to use.
Summary of the invention
The object of the invention is to, for the above-mentioned defect of prior art, provide a kind of small area analysis equipment can to carry out chargingportable power source automatic recognition of load circuit.
There is provided a kind of portable power source automatic recognition of load circuit, the battery core baffle circuit, power supply circuits, charging control circuit, boosting output circuit, the LED display lamp that comprise main control MCU, are connected with main control MCU; Be provided with the sample circuit composed in parallel by resistance R23, R27 in described boosting output circuit, the testing circuit be composed in series by resistance R5, R14, the Test pin of described main control MCU is connected with the serial connection point of described resistance R5, R14; Out-put supply 5V+ by diode D1 and anode B+ one-way conduction, the positive and negative level of main control MCU when shutdown and battery cathode connect.
In foregoing circuit, 5V+ is directly with anode B+ one-way conduction in any case, the positive and negative level of IC when shutting down directly and battery cathode connect, when there being load to insert USB, the voltage of 5V+ produces a voltage to negative pole to 5V-by load positive pole, namely on Test in the pulse of a production rising edge, to MCU reality an external interrupt after it starts to wake up and normally works.Load power source produces a pressure drop by the sampling resistor of R23, R27, and MCU detects the size of load current at that time by Test pin.When inserting load first, if when detecting that load current is less than 200mA, output will a direct-open, only at manual key or time delay six hours (having error range) automatic shutdowns afterwards; If detect that load current is greater than 200mA first, the magnitude of voltage that MCU will constantly sample on Test, now load current is reduced to 50mA(error range) time, portable power source will automatically cut out output and enter resting state.When portable power source is started shooting, load current is greater than certain value (such as 200mA) and just enters automatic shutdown pattern, namely retains small area analysis automatic shut-off function.If load current is less than this value during start, will no longer automatic shutdown, there is output, until unloaded or continue automatic shutdown after six hours always.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
With reference to shown in Fig. 1, Fig. 2: design a kind of portable power source automatic recognition of load circuit, the battery core baffle circuit, power supply circuits, charging control circuit, boosting output circuit, the LED display lamp that be provided with main control MCU, are connected with main control MCU; Be provided with the sample circuit composed in parallel by resistance R23, R27, the testing circuit be composed in series by resistance R5, R14 in boosting output circuit, the Test pin of described main control MCU is connected with the serial connection point of described resistance R5, R14; The out-put supply 5V+ of boosting output circuit by diode D1 and anode B+ one-way conduction, the positive and negative level of main control MCU when shutdown and battery cathode connect.
5V+ is directly with anode B+ one-way conduction in any case, the positive and negative level of IC when shutting down directly and battery cathode connect, when there being load to insert USB, the voltage of 5V+ produces a voltage to negative pole to 5V-by load positive pole, namely on Test in the pulse of a production rising edge, to MCU reality an external interrupt after it starts to wake up and normally works.Load power source produces a pressure drop by the sampling resistor of R23, R27, and MCU detects the size of load current at that time by Test pin.When inserting load first, if when detecting that load current is less than 200mA, output will a direct-open, only at manual key or time delay six hours (having error range) automatic shutdowns afterwards; If detect that load current is greater than 200mA first, the magnitude of voltage that MCU will constantly sample on Test, now load current is reduced to 50mA(error range) time, portable power source will automatically cut out output and enter resting state.
Under normal circumstances, portable power source has little load current automatic shutdown and automatic machine-operated two kinds always, and along with the development of science and technology, wearable device is more and more universal, and the former can not give bluetooth earphone, and the charging currents such as Intelligent bracelet are at the equipment charge of about 50mA; Latter one direct-open, if not human intervention, a direct-open exports, and makes portable power source itself and is in charging operating state by charging device always, reduction product useful life, wastes energy simultaneously! The present invention can be used in daily life, avoids carrying with portable power source but cannot to the embarrassment of bluetooth earphone, Intelligent bracelet charging, and portable power source one straight cutting also can be avoided load and the not hidden danger brought of automatic shutdown.

Claims (1)

1. a portable power source automatic recognition of load circuit, the battery core baffle circuit, power supply circuits, charging control circuit, boosting output circuit, the LED display lamp that comprise main control MCU, are connected with main control MCU; It is characterized in that: be provided with the sample circuit composed in parallel by resistance R23, R27 in described boosting output circuit, the testing circuit be composed in series by resistance R5, R14, the Test pin of described main control MCU is connected with the serial connection point of described resistance R5, R14; Boosting output circuit out-put supply 5V+ by diode D1 and anode B+ one-way conduction, the positive and negative level of main control MCU when shutdown and battery cathode connect.
CN201410810069.0A 2014-12-24 2014-12-24 Mobile power automatic recognition of load circuit Active CN104578264B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410810069.0A CN104578264B (en) 2014-12-24 2014-12-24 Mobile power automatic recognition of load circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410810069.0A CN104578264B (en) 2014-12-24 2014-12-24 Mobile power automatic recognition of load circuit

Publications (2)

Publication Number Publication Date
CN104578264A true CN104578264A (en) 2015-04-29
CN104578264B CN104578264B (en) 2018-08-10

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CN201410810069.0A Active CN104578264B (en) 2014-12-24 2014-12-24 Mobile power automatic recognition of load circuit

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104953666A (en) * 2015-06-30 2015-09-30 黄伟聪 Power supply control method based on mobile power supply
CN106124842A (en) * 2016-07-04 2016-11-16 芯海科技(深圳)股份有限公司 The small area analysis testing circuit of a kind of portable power source and method
CN106341035A (en) * 2016-10-21 2017-01-18 无锡爱睿芯电子有限公司 Power switch module
CN106899058A (en) * 2017-03-07 2017-06-27 东莞市太业电子股份有限公司 Aptitude chargeable circuit and the portable power source using the aptitude chargeable circuit
CN108983066A (en) * 2018-04-25 2018-12-11 上海芯导电子科技有限公司 A kind of electric current automatic detection circuit
CN112531808A (en) * 2020-11-09 2021-03-19 甄十信息科技(上海)有限公司 Battery protection method and device based on mobile terminal
CN114461000A (en) * 2022-01-14 2022-05-10 深圳市卡贝电子技术有限公司 Low-power-consumption maintaining circuit, control method and adapter

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US6337557B1 (en) * 1999-01-25 2002-01-08 Barry K. Kates External universal battery charging apparatus and method
CN201263092Y (en) * 2008-09-28 2009-06-24 徐建华 Mobile power supply
CN203707841U (en) * 2014-01-23 2014-07-09 厦门广开电子有限公司 Circuit structure of mobile power supply
US20140354050A1 (en) * 2013-05-31 2014-12-04 Richtek Technology Corporation Power bank and control method for supplying power
CN204012830U (en) * 2014-07-22 2014-12-10 厦门广开电子有限公司 Portable power source
CN204597499U (en) * 2014-12-24 2015-08-26 东莞市兴开泰电子科技有限公司 Portable power source automatic recognition of load circuit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337557B1 (en) * 1999-01-25 2002-01-08 Barry K. Kates External universal battery charging apparatus and method
CN201263092Y (en) * 2008-09-28 2009-06-24 徐建华 Mobile power supply
US20140354050A1 (en) * 2013-05-31 2014-12-04 Richtek Technology Corporation Power bank and control method for supplying power
CN203707841U (en) * 2014-01-23 2014-07-09 厦门广开电子有限公司 Circuit structure of mobile power supply
CN204012830U (en) * 2014-07-22 2014-12-10 厦门广开电子有限公司 Portable power source
CN204597499U (en) * 2014-12-24 2015-08-26 东莞市兴开泰电子科技有限公司 Portable power source automatic recognition of load circuit

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017000597A1 (en) * 2015-06-30 2017-01-05 广东天物新材料科技有限公司 Power supply control method based on mobile power supply
CN104953666A (en) * 2015-06-30 2015-09-30 黄伟聪 Power supply control method based on mobile power supply
EA036989B1 (en) * 2015-06-30 2021-01-25 Гюангдонг Флексварм Адвансед Материалс Енд Технологи Ко., Лтд. Power supply control method based on mobile power supply
CN104953666B (en) * 2015-06-30 2018-10-23 黄伟聪 A kind of method for controlling power supply based on mobile power
US10433369B2 (en) 2015-06-30 2019-10-01 Guangdong Flexwarm Advanced Materials & Technology Co., Ltd. Power supply control method based on mobile power sources
CN106124842B (en) * 2016-07-04 2019-05-28 芯海科技(深圳)股份有限公司 A kind of the low current detection circuit and method of mobile power source
CN106124842A (en) * 2016-07-04 2016-11-16 芯海科技(深圳)股份有限公司 The small area analysis testing circuit of a kind of portable power source and method
CN106341035A (en) * 2016-10-21 2017-01-18 无锡爱睿芯电子有限公司 Power switch module
CN106899058A (en) * 2017-03-07 2017-06-27 东莞市太业电子股份有限公司 Aptitude chargeable circuit and the portable power source using the aptitude chargeable circuit
CN108983066A (en) * 2018-04-25 2018-12-11 上海芯导电子科技有限公司 A kind of electric current automatic detection circuit
CN112531808A (en) * 2020-11-09 2021-03-19 甄十信息科技(上海)有限公司 Battery protection method and device based on mobile terminal
CN114461000A (en) * 2022-01-14 2022-05-10 深圳市卡贝电子技术有限公司 Low-power-consumption maintaining circuit, control method and adapter
CN114461000B (en) * 2022-01-14 2023-11-24 深圳市卡贝电子技术有限公司 Low-power consumption maintaining circuit, control method and adapter

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