CN104052089A - Novel charging management circuit - Google Patents
Novel charging management circuit Download PDFInfo
- Publication number
- CN104052089A CN104052089A CN201310082623.3A CN201310082623A CN104052089A CN 104052089 A CN104052089 A CN 104052089A CN 201310082623 A CN201310082623 A CN 201310082623A CN 104052089 A CN104052089 A CN 104052089A
- Authority
- CN
- China
- Prior art keywords
- voltage
- battery
- charging
- usb
- combination
- 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.)
- Pending
Links
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention provides a novel charging scheme. In the trend of high current charging, for a USB charging interface and a wireless charging interface which is in accordance with a Qi standard, through using a mode of firstly step-down and secondary step-up, a practical problem of voltage sag is solved, the charging time is reduced, and the charging efficiency of a battery is raised. According to the charging scheme, the charging requirement of an ion battery is satisfied, and the system design of a portable electronic product is optimized.
Description
Affiliated technical field the present invention can realize the charging scheme of large electric current by USB and wireless charging, relate to the novel battery applications of wide-range voltage standard
Background technology is current, and voltage when conventional lithium ion battery is full of electricity is 4.2V, but along with the development of technique and technology, the capacity of lithium ion battery can improve constantly, and cell voltage also inevitably raises.The maximum charging voltage that the current technical development that can see is lithium ion battery can arrive 4.5V, lithium ion battery acceptable charging current is also improving simultaneously, the capacity of battery is installed, the battery of 1000mAh can be accepted the charging current of 1A, if the battery of 2000mAh can be accepted the charging current of 2A, the electric current of so analogizing charging can constantly increase.If but charged by USB cable line, loss energy on the line can increase, the voltage of delivering to USB port can be lower than the magnitude of voltage of USB standard, even lower than the voltage that will charge the battery, like this just the voltage of USB first need to be lowered, then improve again to meet the requirement that the battery of wide-range voltage charges.
Summary of the invention the present invention is directed to the charging requirement of novel lithium ion battery, and meet the applicable cases of large current charge, taking into account under the application scenarios of wireless charging, by the mode that adopts first step-down to boost again, optimize the charging effect of battery, improve the charge efficiency of battery, meet the actual demand of the different charging of consumer scene, and the functional design of portable electronic products quick turn-on in battery power shortage situation is provided
The present invention solves the technical scheme that its technical problem takes: the present invention adds the load switch of alternative, depends on the type of input source.Can be by detecting the impedance notice native system of input source and controlling this load switch.Choose after active input, the single inductance buck-boost converter being combined into by buck converter and booster converter converts the charging voltage that meets battery to, such as a certain specific voltages such as 4.5V.This voltage also can provide electric current to system when charging the battery, can be that system can re-power at battery power shortage like this, and after battery is full of, if still plugged in the situation of external power source, system need to be from battery electricity-taking, guarantee like this situation appearance of battery without repeated charge, reduced the number of times that discharges and recharges of battery, the useful life of having improved battery.
The invention has the beneficial effects as follows: while having solved large current charge, the voltage of power cable falls, reduced the number of times that lithium ion battery discharges and recharges, while having solved battery power shortage, system can re-power, and does not need problem of waiting for etc.
Accompanying drawing explanation
Fig. 1 is the buck charge management circuit of USB and QI dual input
Embodiment USB or QI, as the input of energy, by power MUX " passage " either-or switch, select a certain input source.By Buck power converter cells, implement step-down afterwards.Its principle be switch Q3 high frequency open and disconnected, carrying the direct voltage of coming in to be chopped into square wave voltage signal, and do afterflow by Q4, and guarantee the direct voltage of buck step-down converter filter (Lf-C1) stable output, deliver to again afterwards boost booster converter.In boost converter, Q5 conducting is the input source of USB or QI and inductance L f can be connected in series, and is equivalent to input voltage to raise, then under the characteristic of the one-way conduction of Q6, the voltage rising is transported to output, thereby has guaranteed the stable and specified of output voltage.The scheme that Charge Management cell mesh adopts electric current automatically to distribute, the charging current of battery is to be independent of electric current that system extracts.
Claims (4)
1. a method for novel Charge Management, wherein:
-when access power source is USB, pipe Q1 is opened in power MUX switch combination.The 5V that the voltage of USB input is standard, after the buck converter of Q3+Q4 combination, is adjusted into a direct voltage by inductance L f and capacitor C 1, then rises to the voltage that can charge the battery by the combination adjustment of Q5+Q6.Cell voltage can meet the more application demand of wide region.
-when access power source requires for meeting the wireless charging of " QI " standard, lower pipe Q2 is opened in power MUX switch combination.The voltage of the input of wireless charging is also 5V, and the pattern that can boost again through first step-down equally charges the battery.
-in battery charging management unit, the voltage adjusting through the combination of boosting both charged the battery and also to system load, provided energy, controlled the sample resistance disengaging of battery charge and the power bus of system.
-when battery discharge provides system load energy, battery current offers system load through sample resistance.
2. method according to claim 1, generally the input voltage of USB and " QI " may be lower than 5V, the in the situation that particularly or electric current long at cable being larger.So method claimed in claim 1 is installed, be first depressurized to a certain intermediate voltage, such as 3.3V, then boost to the charging voltage that meets maximum under battery CV pattern.
3. method according to claim 1 and 2, intermediate voltage can be the free voltage lower than 5V, the maximum charging voltage of CV pattern of battery is the voltage that meets any battery standard.
4. the method for this kind of charge management circuit, drives by the method described in claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082623.3A CN104052089A (en) | 2013-03-15 | 2013-03-15 | Novel charging management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082623.3A CN104052089A (en) | 2013-03-15 | 2013-03-15 | Novel charging management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052089A true CN104052089A (en) | 2014-09-17 |
Family
ID=51504621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310082623.3A Pending CN104052089A (en) | 2013-03-15 | 2013-03-15 | Novel charging management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052089A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202464A (en) * | 2006-11-01 | 2008-06-18 | 美国凹凸微系有限公司 | Power management system with charger and boost controller |
| CN201466761U (en) * | 2009-06-23 | 2010-05-12 | 天津三星光电子有限公司 | Digital camera USB charger with wireless charging function |
| CN202602535U (en) * | 2012-03-20 | 2012-12-12 | 立锜科技股份有限公司 | Switching type voltage-stabilizing circuit provided with multiple power input ends and relevant power converter |
-
2013
- 2013-03-15 CN CN201310082623.3A patent/CN104052089A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202464A (en) * | 2006-11-01 | 2008-06-18 | 美国凹凸微系有限公司 | Power management system with charger and boost controller |
| CN201466761U (en) * | 2009-06-23 | 2010-05-12 | 天津三星光电子有限公司 | Digital camera USB charger with wireless charging function |
| CN202602535U (en) * | 2012-03-20 | 2012-12-12 | 立锜科技股份有限公司 | Switching type voltage-stabilizing circuit provided with multiple power input ends and relevant power converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204216600U (en) | Synchronization lifting piezoelectric battery charging device | |
| CN204131210U (en) | Power supply switch circuit and portable electric appts | |
| CN103269105B (en) | Certainly the control multivoltage output system of stand-by power supply | |
| CN103607009A (en) | Charging and discharging circuit with automatic protecting function | |
| CN104767252A (en) | Tablet computer | |
| CN105406542A (en) | Voltage-controlled current-limiting charging circuit for supercapacitor bank | |
| CN105471368A (en) | Solar assembly roof system | |
| CN105914851A (en) | Multichannel energy bidirectional control circuit | |
| CN203278376U (en) | Self-controlled multi-voltage output system of stand-by power supply | |
| CN201527619U (en) | USB power supply device | |
| CN103281013A (en) | Photovoltaic power supply system | |
| CN201947182U (en) | Bi-directional DC/DC (direct current to direct current) power supply | |
| CN204103559U (en) | A kind of power circuit | |
| CN201490734U (en) | Solar movable power supply | |
| CN206442169U (en) | Portable type solar recharging knapsack | |
| CN203423622U (en) | Vehicle-mounted mobile phone wireless charger voltage-stabilized power supply | |
| CN106134501B (en) | A kind of multichannel output module power supply is lower electric sequential control circuit preferentially | |
| CN205092770U (en) | Power management circuit that steps up | |
| CN203103991U (en) | Mobile solar civil wireless small household appliance system | |
| CN104052089A (en) | Novel charging management circuit | |
| CN204131149U (en) | A kind of from Portable photovoltaic lithium battery charging device under net state | |
| CN206575183U (en) | Multifunctional portable power source | |
| CN103855734A (en) | Solar-energy independent power-supply system | |
| CN204013467U (en) | A kind of from power-saving circuit | |
| CN204349470U (en) | Portable power source integrated circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |
|
| WD01 | Invention patent application deemed withdrawn after publication |