CN102593923A - Mobile power supply - Google Patents
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- CN102593923A CN102593923A CN2012100717744A CN201210071774A CN102593923A CN 102593923 A CN102593923 A CN 102593923A CN 2012100717744 A CN2012100717744 A CN 2012100717744A CN 201210071774 A CN201210071774 A CN 201210071774A CN 102593923 A CN102593923 A CN 102593923A
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Abstract
The invention discloses a mobile power supply, which comprises a storage battery, a charging control circuit, a battery core protection circuit, a micro control unit (MCU) control circuit and a direct current-direct current (DC-DC) booster circuit, wherein the charging control circuit is provided with an input end which can be connected with an external power supply; the output end of the charging control circuit is electrically connected with the input end of the battery core protection circuit; the storage battery is electrically connected with the battery core protection circuit; the battery core protection circuit is electrically connected with the DC-DC booster circuit; and the MCU control circuit is electrically connected with the DC-DC booster circuit. The mobile power supply also comprises an automatic identification circuit, wherein the automatic identification circuit identifies connected load equipment, and is electrically connected with the MCU control circuit. The mobile power supply is high in capacity, small in volume, light in weight and quick and safe in charging, and has a unique battery repair function; and the effect of prolonging the service life of the power supply is achieved.
Description
Technical field
The present invention relates to the electric supply installation of electronic product, particularly portable power source.
Background technology
Current society, digital products such as mobile phone, digital camera, electronic reader, MP3, MP4 emerge in an endless stream, and these electronic products also are that it is thin more to do littler and littler, and it is more and more that function becomes.Simultaneously also along with the electronic product attenuation that constantly diminishes, battery capacity is also corresponding more and more littler for battery, and will shorten service time this moment, can not satisfy user's demand.To such situation, be used for specially arising at the historic moment to the portable power source of electronic products such as mobile phone charging.Patent like following discloses:
Publication number is the Chinese invention patent " the three-in-one structure of lithium battery portable power source, electric-quantity monitoring and charger " of CN201781297U; Disclose a kind of lithium battery portable power source, electric-quantity monitoring and the three-in-one structure of charger, multiple function has been attached on the identical product.
Publication number is the Chinese invention patent " a kind of portable power source " of CN101685974; A kind of portable power source is disclosed; Adopt single MCU microcontroller chip and typing corresponding control programs; Can utilize commercial power chargedly through the power supply adaptor of joining outward, also can give multiple electronic product power supply through changing different output conversion heads.
Summary of the invention
But CN201781297U uses USB interface, and its scope of application is restricted.The portable power source of CN101685974 repeatedly uses the back battery capacity to reduce.Therefore, the purpose of this invention is to provide a kind of portable power source, can solve above-mentioned one or more problems.
In order to achieve the above object, according to an aspect of the present invention, a kind of portable power source is provided; Comprise storage battery, charging control circuit, electric core protective circuit, MCU control circuit and DC-DC booster circuit; Charging control circuit is provided with the input that can be connected with external power source, and the output of charging control circuit is electrically connected with the input of electric core protective circuit, and storage battery is electrically connected with electric core protective circuit; Electricity core protective circuit is electrically connected with the DC-DC booster circuit; The MCU control circuit is electrically connected with the DC-DC booster circuit, also comprises the automatic identification circuit of the load equipment that identification inserts, and automatic identification circuit is electrically connected with the MCU control circuit.
In some embodiments, automatic identification circuit is by the control of MCU control circuit, and the output current that makes automatic identification circuit is first electric current and second electric current, and first electric current is greater than second electric current.Thus, can have the effect of using a portable power source charge for multiple different electronic product.
In some embodiments; Also comprise battery reparation circuit; Battery is repaired circuit and is electrically connected with MCU control circuit, DC-DC booster circuit respectively, and the electric current way of output that battery is repaired circuit is the cycle pulse mode, and battery is repaired circuit and comprised two triodes; Shutoff and conducting through MCU control circuit control triode; Making the electric current way of output is the cycle pulse mode, and the cycle pulse mode comprises: first electric current of circulation output very first time section, second electric current of second time period of output and export the first cycle pulse mode and the second cycle pulse mode of second electric current of circulation second time period of output and the 3rd electric current of the 3rd time period of output of the 3rd electric current of the 3rd time period; Said first electric current is greater than second electric current, and said second electric current is greater than the 3rd electric current.Thus, can have sharpening material in the activated batteries, recover the effect of battery capacity.
In some embodiments, the DC-DC booster circuit is a binary channels DC-DC booster circuit.Thus, can have the effect of charging simultaneously to two equipment.
In some embodiments, also comprise and be used to detect the current detection circuit of accumulator electric-quantity and be electrically connected the LED lamp electric weight display circuit that detects electric weight to show with the MCU control circuit.The effect that can have thus, real-time understanding electric weight.
In some embodiments, also comprise the MCU reset circuit, be electrically connected with storage battery and MCU control circuit respectively.Thus, can have the MCU of preventing control circuit out-of-work phenomenon when meeting accident fault.
In some embodiments, also comprise the LED lighting circuit, be electrically connected with storage battery and MCU control circuit respectively.Thus, can have the effect of when going out walking in the night or read night, being used as the illumination use.
In some embodiments; Also comprise the multi-functional composite key circuit that is used for man-machine control input; Be electrically connected with the MCU control circuit, multi-functional composite key circuit can be electrically connected with any circuit that battery is repaired in circuit, current detection circuit, LED lamp display circuit, MCU reset circuit and the LED lighting circuit respectively through the MCU control circuit.Thus, the time that the MCU control circuit is pressed through analysis button, the time during for low level is carried out the effect of difference in functionality.
Description of drawings
Fig. 1 is the portable power source system block diagram of one embodiment of the present invention;
Fig. 2 is the schematic diagram of MCU control circuit of the present invention
Fig. 3 is the schematic diagram of the multi-functional composite key circuit of the present invention;
Fig. 4 is the circuit theory diagrams of DC-DC booster circuit of the present invention, battery reparation and automatic identification;
Fig. 5 is the schematic diagram of the automatic MCU reset circuit of the present invention;
Fig. 6 is the schematic diagram of current detecting of the present invention and LED lamp electric weight display circuit;
Fig. 7 is the schematic diagram of LED lighting circuit of the present invention;
Fig. 8 is the MCU control circuit flow chart that operation is controlled according to multifunction push key.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 has schematically shown portable power source according to an embodiment of the present invention.As shown in the figure, the portable power source of one embodiment of the present invention comprises: storage battery 1, charging control circuit 2, MCU control circuit 3, DC-DC booster circuit 4, electric core protective circuit 5 and automatic identification circuit 12.
Because of present electronic product battery in use for some time; Battery capacity will reduce, and in order to recover battery capacity, increases battery useful life; One battery also can be set repair circuit 6, said battery is repaired circuit 6 and is electrically connected with MCU control circuit 3, DC-DC booster circuit 4 respectively.
In order to understand the battery electric quantity in the said portable power source timely, so also comprised and be used to detect the current detection circuit 7 of storage battery 1 electric weight in the said portable power source and the LED lamp electric weight display circuit 8 that is electrically connected with said MCU control circuit.
In addition, the core of MCU control circuit 3 is the MCU microprocessor chip, can not reset in order to prevent the MCU microprocessor chip from the process of operation, meeting accident mistake, so also be provided with automatic MCU reset circuit 9.Automatically MCU reset circuit 9 is electrically connected with storage battery 1 and MCU control circuit 3 respectively.
Use said portable power source at night for the convenience of the users, so also LED lighting circuit 10 can be set further.LED lighting circuit 10 is electrically connected with storage battery 1 and MCU control circuit 3.
Further, can realize through man-machine control input in order to make above-mentioned functions, so also be provided with multi-functional composite key circuit 11.
Core parts in the MCU control circuit 3 of Fig. 2 are MCU microprocessor chip U2, the EM78F655QFN chip that can adopt Taiwan Yilong Electric ELECTRONICS CO LTD to produce.
The S-8261 single-unit lithium ion battery protection chip that electricity core protective circuit 5 can adopt NSK to produce, this built-in chip type high-accuracy voltage testing circuit and delay circuit are the protection chips that is used for lithium ion/lighium polymer rechargeable battery.Single-unit lithium ion/lighium polymer rechargeable battery pack played overcharge, the protective effect of overdischarge and overcurrent and short circuit.
As shown in Figure 4, the peripheral circuits such as managing chip 2U1 and metal-oxide-semiconductor 2Q1, triode 2Q2, power inductance 2L1, rectifying schottky diode 2D1 and electric capacity 2C2,2C4,2C5 that boost constitute one road DC-DC booster circuit 4.The YS4123 that the managing chip 2U1 that boosts can adopt Taiwan Yu Sheng Semiconductor Co., Ltd the to produce managing chip that boosts.
As shown in Figure 4, button S1, MCU microprocessor chip U2 constitute automatic identification circuit 12 with resistance 2R17/3R17, amplification chip 2U2/3U2, the managing chip 2U1/3U1 that boosts, diode 2D2/3D2, triode 2Q3/3Q3, triode 2Q2/3Q2, metal-oxide-semiconductor 2Q1/3Q1 and peripheral circuit respectively.
As shown in Figure 6, current detection circuit 7 detects the electric weight in the storage battery 1 through MCU control circuit 3 detected magnitudes of voltage, and shows the electric weight of storage battery 1 through LED lamp electric weight display circuit 8.Current detection circuit 7 is electrically connected with MCU control circuit 3, DC-DC booster circuit 4 and LED lamp electric weight display circuit 8 respectively.LED lighting circuit 10 is electrically connected with storage battery 1 and MCU control circuit 3 respectively.Battery is repaired circuit 6 and is made up of with resistance 2R17/3R17, amplification chip 2U2/3U2, the managing chip 2U1/3U1 that boosts, triode 2Q3/3Q3 and peripheral circuit respectively button S1, MCU microprocessor chip U2.Multi-functional composite key circuit 11 shown in Figure 3 inserts MCU microprocessor chip U2 by button S1 through resistance R 9, and MCU microprocessor chip U2 is the low level time to carry out difference in functionality through analysis button S1.Fig. 8 carries out the flow chart of each function for the asynchronism(-nization) of MCU microprocessor chip U2 analysis button S1.The identifying of automatic identification circuit is following:
Shown in Fig. 3-4, after portable power source inserts load equipment, click button S1 less than 2 seconds, this moment, MCU microprocessor chip U2 will be waken up.The USB1_A of MCU microprocessor chip U2, USB2_A export high level, make triode 2Q2, triode 3Q2 conducting, also make simultaneously metal-oxide-semiconductor 2Q1, metal-oxide-semiconductor 3Q1 conducting.And will have power supply this moment because of DC-DC booster circuit 4, and make DC-DC booster circuit 4 operate as normal.At this moment, after process DC-DC booster circuit 4 boosted, the output 2CON1 of portable power source, the acquiescence output current of 3CON1 were big electric current, promptly more than or equal to 1.5A.
When load was large current charge equipment (requiring charging current more than or equal to 1.5A), the charging of large current charge equipment was in proper working order.Large current charge equipment just can not charge normal when importing less than 1.0A.
When load is low current charge equipment, can because DC-DC booster circuit 4 output currents greater than 1.0A, and low current charge equipment can stop automatically the charging, this moment output current be 0A.At this moment MCU microprocessor chip U2 will detect the variation of output current through resistance 2R17 or resistance 3R17, amplifies USB1_B or the USB1_B port of delivering to MCU microprocessor chip U2 through amplifying chip 2U2B or 3U2B then.This moment, USB1_A and the USB2_A port of MCU microprocessor chip U2 were low level just, and kept 2 seconds.This moment, triode 2Q2 and triode 3Q2 will end, and metal-oxide-semiconductor 2Q1 and 3Q1 also can end simultaneously.At this moment, DC-DC booster circuit 4 stops the work of whole portable power source because there not being power supply.The low current charge load equipment will quit work because of recognizing portable power source, and acquiescence low current charge load equipment has broken off with portable power source, and this moment, little current loading equipment will return to normal operating conditions.
The USB1_C of MCU microprocessor chip U2 or the output of USB2_C will be high level at this moment; This moment, triode 2Q3 or triode 3Q3 will conductings; Amplify chip 2U2A or 3U2A and then can get into the constant current operating state, feed back to the FB pin of boost the managing chip 2U1 or the managing chip 3U1 (like YS4123) that boosts through diode 2D2,3D2.At this moment; MCU microprocessor chip U2 will reduce by one grade of input that makes it meet low current charge equipment with output current; This moment MCU microprocessor chip U2 USB1_A and USB2_A output high level, and triode 2Q2, triode 3Q2 will conductings, metal-oxide-semiconductor 2Q1 and metal-oxide-semiconductor 3Q1 also can the while conductings; Make the power supply of DC-DC booster circuit 4 normal, this moment, portable power source will charge normal low current charge equipment.So just can solve different user when using different loads equipment, the problem that can not use same portable power source that produces because the required charging current of different loads equipment varies in size.
The redundant recognition function that repeats:
As detecting failure for the first time, equipment does not charge, and output current is 0A.This moment, MCU microprocessor chip U2 can detect the output current variation through resistance 2R17 or resistance 3R17; Through amplifying chip 2U2B or amplifying chip 3U2B and amplify USB1_B or the USB1_B port of delivering to MCU microprocessor chip U2, this moment, USB1_A and the USB2_A of MCU microprocessor chip U2 then were low-voltage.End through triode 2Q2 after 2 seconds and triode 3Q2, this moment, metal-oxide-semiconductor 2Q1 also can end with metal-oxide-semiconductor 3Q1, and DC-DC booster circuit 4 yet can not supplied power and do not quit work because having.This moment, load equipment will break off with portable power source because DC-DC booster circuit 4 quits work, and returned to uncharged state, and the USB1_A of MCU and USB2_A will export high level then.Triode 2Q2 and triode 3Q2 also can follow conducting, and metal-oxide-semiconductor 2Q1 and metal-oxide-semiconductor 3Q1 be conducting simultaneously also, and DC-DC booster circuit 4 is supplied power and operate as normal because of having, and will get into above-mentioned automatic identification procedure this moment once more.Ordinary circumstance after load equipment is full of electricity, the state the when size of electric current will change to the full electricity of load, this moment, the charger of load equipment will turn-off charging current.For guaranteeing to be full of battery; The USB1_A of MCU microprocessor chip U2 and USB2_A are that low-voltage was through 2 seconds; This moment, triode 2Q2 and triode 3Q2 ended, and metal-oxide-semiconductor 2Q1 and metal-oxide-semiconductor 3Q1 also can end simultaneously, make DC-DC booster circuit 4 and do not quit work because there being power supply.Equipment is because of recognizing the charger disconnection and resetting; The USB1_A of MCU microprocessor chip U2 and USB2_A export high level then; This moment triode 2Q2 and triode 3Q2 conducting, metal-oxide-semiconductor 2Q1 and metal-oxide-semiconductor 3Q1 be conducting simultaneously also, makes DC-DC booster circuit 4 and supplies power and operate as normal because have; Will get into above-mentioned automatic identification procedure this moment once more, and charging device is replenished once again.Multi-functional composite key circuit function is following:
As shown in Figure 8, the S1 that pushes button (step S801), portable power source began to judge and pressed the time (step S802) this moment.As the button time smaller or equal to 2 seconds (step S803), then will the starting current testing circuit after 20 seconds 7 with LED lamp electric weight display circuit 8, carry out current detecting and show electric weight (step S804).This moment, portable power source began to detect whether load (step S805) is arranged.When having detected load, in 2 seconds, even double-clicked (step S806) like button, portable power source gets into resting state, thereby reaches low standby power loss.As do not detect load, and then button was clicked (step S807) in 2 seconds, and portable power source will get into standby low-power consumption (step S808).As the button time greater than 2 seconds, then can get into another judge button time more than or equal to 3 seconds smaller or equal to 7 seconds (step S809).As the button time more than or equal to 3 seconds smaller or equal to 7 seconds, then can start lighting circuit (step S810); As whether then can further judging the button time greater than 10 seconds (step S811) greater than 7 seconds, will get into greater than 10 seconds like the button time and to start battery reparation (step S802).More specifically explanation below.
Like Fig. 6 and shown in Figure 3; The of short duration S1 that pushes button (as smaller or equal to 2 seconds); This moment, current detection circuit 7 and LED lamp electric weight display circuit 8 started, and MCU control circuit 3 Control current testing circuits 7 are exported through the LED light L1 in the LED electric weight display circuit 8 electric weight in the said storage battery 1 the different electric weight of storage battery 1 to the incompatible demonstration of the different switches set of LED light L5.Glittering storage battery 1 undervoltage warning of then representing of LED light L5 needs accumulators 1 charging.Bright storage battery 1 interior 40% the electric weight in addition of then representing of LED light L5 and LED light L4.Bright storage battery 1 interior 60% the electric weight in addition of then representing of LED light L5, LED light L4 and LED light L3.LED light L5, LED light L4, LED light L3 and LED light L2 are bright to represent that then the electric weight in the storage battery 1 is 80%.LED light L1~L5 is bright entirely to represent that then the electric weight in the storage battery 1 is full.
Like Fig. 3 and shown in Figure 7, button S1 long by the time more than or equal to 3 seconds and smaller or equal to time of 7 seconds, this moment, the LED lighting circuit 10 started, this moment, reading lamp L6 will light.The L6 of high brightness adopts the high-powered LED lamp with illuminating effect, when going out walking in the night and read night, can play the effect of illumination.
Like Fig. 3, Fig. 4 and shown in Figure 6, button S1, MCU microprocessor chip U2 respectively with resistance 2R17 and resistance 3R17, amplify chip 2U2 and 3U2, boost managing chip 2U1 and 3U1, triode 2Q3 and triode 3Q3, LED light L1-L5 constitute battery and repair circuit 6.When button S1 length was pressed greater than 10 seconds, MCU microprocessor chip U2 will start battery and repair circuit 6, gets into the battery repair function.This moment, LED light L1-L5 indicator light cycle was glittering.Shutoff and the conducting of MCU microprocessor chip U2 control triode 2Q3 or triode 3Q3; MCU microprocessor chip U2 Control current pin USB1_C/USB2_C output low level; And make USB1_C1/USB2_C1 be in a low level state maintenance very first time section (for example 10 seconds); Constant-current control circuit triode 2Q3, triode 2Q4 end at this moment, and making the output constant current is first electric current (like 1.5A).MCU microprocessor chip U2 Control current pin USB1_C/USB2_C exports high level then, and makes the USB1_C1/USB2_C1 output low level keep for second time period (for example 2 seconds).Constant-current control circuit triode 2Q3 conducting this moment, triode 2Q4 end, and making the output constant current is second electric current (like 1A).MCU microprocessor chip U2 Control current pin USB1_C/USB2_C output high level then, and make USB1_C1/USB2_C1 be in high level state to keep for the 3rd time period (for example 2 seconds).Constant-current control circuit triode 2Q3 conducting this moment, triode 2Q4 conducting, making the output constant current is the 3rd electric current (0.4A).First current charges of the maximum that will to form an output current like this be very first time section; And then the second medium current charges of second time period; The last first cycle pulse mode of the 3rd current charges of the minimum of the 3rd time period again can be used for large current charge equipment.Perhaps, output current is the medium current charging of second time period, and then the second cycle pulse mode of the low current charge of the 3rd time period, can be used for low current charge equipment.Thus, can activated batteries in the sharpening material, recover battery capacity.The above-mentioned time period can make big electric current (first electric current) charging interval longer according to the concrete condition adjustment of load equipment, short getting final product of little electric current (second, third electric current) charging interval.
Shown in Fig. 3-4, when portable power source was in open state, said portable power source had load; Then button S1 connected in 2 seconds by 2 times; This moment, MCU microprocessor chip U2 got into the standby low power consumpting state, and the USB1_A of MCU microprocessor chip U2, USB2_A are low-voltage, thereby triode 2Q2 and triode 3Q2 end; This moment, metal-oxide-semiconductor 2Q1 and triode 3Q1 also ended simultaneously, DC-DC booster circuit 4 is not had supply power and quit work.MCU microprocessor chip U2 will get into resting state automatically then, thereby reaches low standby power loss.And when said portable power source was non-loaded, button S1 only need be by 1 time and less than 2 seconds, and MCU microprocessor chip U2 will get into the standby low power consumpting state.
The MCU reset circuit is controlled as follows:
As shown in Figure 5, automatic MCU reset circuit 9 when LDO low pressure difference linear voltage regulator U1, resistance R 14, capacitor C 8, capacitor C 9, resistance R 13, resistance R 15, metal-oxide-semiconductor Q2 and resistance R 15 constitute charging.When inserting charging plug, the charging input voltage is loaded on the capacitor C 8.Can not suddenly change because of the electric capacity voltage, will be coupled to metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q2 conducting.This moment, LDO low pressure difference linear voltage regulator U1 Enable Pin was a low level, and LDO low pressure difference linear voltage regulator U1 will stop output, and MCU microprocessor chip U2 quits work because of power failure.Capacitor C 8 is charged to high level through momentary charge, and this moment, metal-oxide-semiconductor Q2 ended.And this moment, LDO low pressure difference linear voltage regulator U1 Enable Pin became high level, and LDO low pressure difference linear voltage regulator U1 starts working and exports 2.8V voltage.This moment MCU microprocessor chip U2 electrification reset, MCU microprocessor chip U2 gets into operate as normal.
Above-described only is execution modes more of the present invention.For the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. portable power source; Comprise storage battery, charging control circuit, electric core protective circuit, MCU control circuit and DC-DC booster circuit, said charging control circuit is provided with the input that can be connected with external power source, and the output of said charging control circuit is electrically connected with the input of said electric core protective circuit; Said storage battery is electrically connected with said electric core protective circuit; Said electric core protective circuit is electrically connected with said DC-DC booster circuit, and the MCU control circuit is electrically connected with the DC-DC booster circuit, it is characterized in that; Also comprise the automatic identification circuit of the load equipment that identification inserts, said automatic identification circuit is electrically connected with the MCU control circuit.
2. portable power source according to claim 1 is characterized in that, said automatic identification circuit is controlled by said MCU control circuit, and the output current that makes said automatic identification circuit is first electric current and second electric current, and said first electric current is greater than said second electric current.
3. portable power source according to claim 2 is characterized in that, also comprises battery reparation circuit, and said battery is repaired circuit and is electrically connected with said MCU control circuit, DC-DC booster circuit respectively.
4. portable power source according to claim 3 is characterized in that, said battery is repaired circuit and comprised two triodes, and said triode is turn-offed and conducting by said MCU control circuit control, and making the electric current way of output is the cycle pulse mode.
5. portable power source according to claim 4; It is characterized in that; Said cycle pulse mode comprises: circulation is exported first electric current, second electric current of second time period of output of very first time section and is exported the first cycle pulse mode of the 3rd electric current of the 3rd time period; With the second cycle pulse mode of circulate second electric current of exporting for second time period and the 3rd electric current of exporting for the 3rd time period, said first electric current is greater than second electric current, and said second electric current is greater than the 3rd electric current.
6. portable power source according to claim 5 is characterized in that, said DC-DC booster circuit is a binary channels DC-DC booster circuit.
7. portable power source according to claim 6 is characterized in that, also comprises being used to detect the current detection circuit of accumulator electric-quantity and being electrically connected the LED lamp electric weight display circuit that detects electric weight to show with said MCU control circuit.
8. portable power source according to claim 7 is characterized in that, also comprises the MCU reset circuit, is electrically connected with storage battery and MCU control circuit respectively.
9. portable power source according to claim 8 is characterized in that, also comprises the LED lighting circuit, is electrically connected with said storage battery and MCU control circuit respectively.
10. according to each described portable power source of claim 1-9, it is characterized in that, also comprise multi-functional composite key circuit, be electrically connected with said automatic identification circuit and MCU control circuit respectively.
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CN102931695A (en) * | 2012-10-11 | 2013-02-13 | 惠州市尚联达电子有限公司 | Mobile power supply capable of automatically detecting load and method for charging load battery |
CN104753138A (en) * | 2015-03-31 | 2015-07-01 | 深圳市倍斯特电源有限公司 | Mobile power source and charging circuit thereof |
CN105553022A (en) * | 2016-01-13 | 2016-05-04 | 深圳市龙威盛电子科技有限公司 | Charging terminal |
TWI556565B (en) * | 2014-05-07 | 2016-11-01 | 大同股份有限公司 | Power supply module and control method thereof |
CN107490424A (en) * | 2017-07-17 | 2017-12-19 | 上海斐讯数据通信技术有限公司 | A kind of Weight-detecting device heating means and system, heating plate control circuit |
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CN202513626U (en) * | 2012-03-19 | 2012-10-31 | 深圳市龙威盛电子科技有限公司 | Mobile power supply |
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CN102931695A (en) * | 2012-10-11 | 2013-02-13 | 惠州市尚联达电子有限公司 | Mobile power supply capable of automatically detecting load and method for charging load battery |
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CN104753138A (en) * | 2015-03-31 | 2015-07-01 | 深圳市倍斯特电源有限公司 | Mobile power source and charging circuit thereof |
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CN105553022B (en) * | 2016-01-13 | 2019-05-24 | 深圳市龙威盛电子科技有限公司 | Charging terminal |
CN107490424A (en) * | 2017-07-17 | 2017-12-19 | 上海斐讯数据通信技术有限公司 | A kind of Weight-detecting device heating means and system, heating plate control circuit |
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Application publication date: 20120718 |