CN102208702B - Battery charging method and electronic device - Google Patents
Battery charging method and electronic device Download PDFInfo
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- CN102208702B CN102208702B CN201110117185.0A CN201110117185A CN102208702B CN 102208702 B CN102208702 B CN 102208702B CN 201110117185 A CN201110117185 A CN 201110117185A CN 102208702 B CN102208702 B CN 102208702B
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- 238000007600 charging Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010277 constant-current charging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery charging method, which comprises the following steps of: acquiring corresponding charging current from a query table according to a difference value between the output voltage of a charger and the voltage of a battery, and charging the battery by adopting the charging current. The embodiment of the invention also relates to an electronic device. By the battery charging method and the electronic device, output current can be dynamically regulated according to the difference value between the output voltage of the charger and the voltage of the battery.
Description
Technical field
The present invention relates to field of electronic devices, particularly relate to method for charging batteries and electronic installation.
Background technology
The charging process of battery includes preliminary filling, constant current is filled with constant voltage and filled 3 stages.
Charging current when constant-current charging of battery is subject to the impact of mos field effect transistor MOSFET rated disspation.Power consumption on MOSFET is P=(VCHG-VBAT) × ICHG.VCHG is wherein the output voltage of charger, and VBAT is cell voltage, and ICHG represents current charging current.
In actual life, user often may not use the charger of standard configuration to charge to battery, occur that VCHG is excessive if used charger inferior, and charging current is based on standard configuration charger, will cause the power consumption on MOSFET to exceed its rated disspation, thereby may cause that MOSFET is overheated a series of charging safety problems such as burns.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of according to the difference of charger output voltage and cell voltage, dynamically adjusts the method and apparatus of output current.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the charging method that a kind of battery is provided.Wherein, from question blank, obtain corresponding charging current according to charger output voltage with the difference of cell voltage, set described charging current by register, adjust charging current by MOSFET, and described question blank and MOSFET are preset in to the inside of battery applications device, the actual charge current size detecting according to feedback control unit is dynamically adjusted the grid voltage of described MOSFET and is realized described charging current, adopts described charging current to charge the battery.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of electronic installation is provided.This electronic installation comprises voltage tester unit, for obtaining corresponding charging current with the difference of the voltage of battery from question blank according to the output voltage of charger, the current regulation unit with MOSFET being connected with voltage tester unit, with the feedback control unit that described current regulation unit is connected, the grid voltage that described feedback control unit is dynamically adjusted described MOSFET according to the actual charge current size detecting is realized described charging current.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention can, according to the difference of charger output voltage and cell voltage, dynamically adjust output current.Meanwhile, the method, when cell voltage rises, dynamically improves charging current, thereby also can reach the effect of saving the charging interval.
Accompanying drawing explanation
Fig. 1 is the module diagram of electronic installation according to an embodiment of the invention;
Fig. 2 is a kind of circuit realization figure of the electronic installation of Fig. 1;
Fig. 3 is the flow chart of the method for charging batteries of the embodiment of the present invention.
Embodiment
Consult Fig. 1, according to one embodiment of present invention, the invention provides a kind of electronic installation 100, it comprises voltage tester unit 110, for obtaining corresponding charging current with the difference of the voltage of battery from question blank according to the output voltage of charger; And there is the current regulation unit 120 of MOSFET, for realizing this charging current.Wherein, voltage tester unit 110 is connected with current regulation unit 120.
According to the rated disspation situation of MOSFET, the corresponding relation question blank of a default VCHG-VBAT and ICHG.Its corresponding relation is: MOSFET rated disspation P=(VCHG-VBAT) × ICHG.
Take the rated disspation of MOSFET as 1W is as example, its corresponding relation question blank is as shown in table 1:
| VCHG-VBAT(V) | ICHG(MA) |
| 1.8V | 556 |
| 1.9V | 526 |
| ---- | ---- |
| 2.5V | 400 |
| 2.6V | 385 |
Table 1
Battery applications device, for example mobile phone are generally opened constant current mold filling formula in the time that cell voltage is 3.2V.The nominal of charger output is generally 5V on the market.Concrete VCHG-VBAT maximum set value, depends on the state of charger on the market, and in general, 2.6V should cover most of charger on the market.Due to MOSFET individual difference, in the setting of ICHG, need to consider some surpluses.
Timer of electronic installation inner setting carrys out timing and detects VCHG and VBAT, obtains VCHG-VBAT.This timer time can software set.According to actual conditions, can be set as 30 seconds.
In order to guarantee fail safe, in the time that the value of obtaining VCHG-VBAT is tabled look-up, get its lower limit.Such as VCHG-VBAT=2.51～2.59, its respective value of tabling look-up should be chosen as 2.5V.
The charging current that current regulation unit 120 is set according to register, the grid voltage of adjusting MOSFET is realized the charging current of setting.
This electronic installation 100 can be included in battery applications device.Battery applications device can be the devices such as mobile phone or digital camera.
It should be noted that, the scheme in current regulation unit 120 in the present invention with MOSFET is not unique, can adopt other circuit with electric current regulatory function to replace MOSFET to realize same or similar function yet.
Fig. 2 is a kind of circuit realization figure of the electronic installation of Fig. 1.Battery applications device, for example mobile phone, according to the rated disspation situation of MOSFET, are preset the corresponding relation question blank of a VCHG-VBAT and ICHG therein.Its corresponding relation is: MOSFET rated disspation P=(VCHG-VBAT) * ICHG.
Take the rated disspation of MOSFET as 1W is as example, its corresponding relation question blank is as follows:
| VCHG-VBAT(V) | ICHG(MA) |
| 1.8V | 556 |
| 1.9V | 526 |
| ---- | ---- |
| 2.5V | 400 |
| 2.6V | 385 |
Mobile phone is generally opened constant current mold filling formula in the time that cell voltage is 3.2V.The nominal of charger output is generally 5V on the market.Concrete VCHG-VBAT maximum set value, depends on the state of charger on the market, and in general, 2.6V should cover most of charger on the market.Due to MOSFET individual difference, in the setting of ICHG, need to consider some surpluses.
Voltage tester unit 210 obtains current VCHG and VBAT by two ADC.VCHG carries and is not with under the state of carrying at charger band and varies in size, so, need under unlatching constant current charging mode, measure VCHG.
Timer of electronic installation inner setting carrys out timing and detects VCHG and VBAT, obtains VCHG-VBAT.This timer time can software set.According to actual conditions, can be set as 30 seconds.
In order to guarantee fail safe, in the time that the value of obtaining VCHG-VBAT is tabled look-up, get its lower limit.Such as VCHG-VBAT=2.51～2.59, its respective value of tabling look-up should be chosen as 2.5V.
Voltage tester unit 210 is according to the VCHG-VBAT monitoring, by the current ideal charging electric current of the Dynamic Acquisition of tabling look-up.Current ideal charging current settings can have been set by register.
The charging current of setting according to register, the grid voltage of adjusting MOSFET220 is realized the charging current of setting.
Electronic installation self is with closed loop feedback controlling mechanism.Judge current charging current by detecting current sense resistor 230 both end voltage, because this resistance has high accuracy characteristic, can accurately reflect charging current.The closed loop charging control loop of electronic installation can be realized according to the grid voltage of the dynamic MOSFET220 of adjustment of actual charge current size detecting the charging current of current setting.
Fig. 3 is the flow chart of the method for charging batteries of the embodiment of the present invention.Consult Fig. 3, according to one embodiment of present invention, the charging method that the invention provides a kind of battery, comprising: from question blank, obtain corresponding charging current (step 301) according to charger output voltage with the difference of cell voltage, adopt this charging current charge the battery (step 302).
According to one embodiment of present invention, adjust charging current by MOSFET, and question blank and MOSFET are preset in to the inside of battery applications device.Carry out timing by timer and detect charger output voltage and cell voltage obtains its difference, for the adjustment charging current that upgrades in time.
Set this charging current by register, and realize this charging current by the grid voltage that current regulation unit 120 is adjusted MOSFET.The actual charge current size detecting according to feedback control unit 130 is dynamically adjusted the grid voltage of MOSFET and is realized this charging current.In feedback control unit 130, precision resister is set, for detection of actual charge current.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. the charging method of a battery, comprise: from question blank, obtain corresponding charging current according to charger output voltage with the difference of cell voltage, set described charging current by register, adjust charging current by MOSFET, and described question blank and MOSFET are preset in to the inside of battery applications device, it is characterized in that
The actual charge current size detecting according to feedback control unit is dynamically adjusted the grid voltage of described MOSFET and is realized described charging current, adopts described charging current to charge the battery.
2. method according to claim 1, is characterized in that,
Carry out timing by timer and detect charger output voltage and cell voltage obtains its difference, for the adjustment charging current that upgrades in time.
3. method according to claim 1, is characterized in that, in described feedback control unit, precision resister is set, for detection of actual charge current.
4. an electronic installation, comprising: voltage tester unit, for obtaining corresponding charging current with the difference of the voltage of battery from question blank according to the output voltage of charger, it is characterized in that,
The current regulation unit with MOSFET being connected with voltage tester unit, with the feedback control unit that described current regulation unit is connected, the grid voltage that described feedback control unit is dynamically adjusted described MOSFET according to the actual charge current size detecting is realized described charging current.
5. electronic installation according to claim 4, is characterized in that,
Described feedback control unit comprises precision resister, for detection of actual charge current.
6. electronic installation according to claim 4, is characterized in that,
Described question blank is preset in the inside of battery applications device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117185.0A CN102208702B (en) | 2011-05-06 | 2011-05-06 | Battery charging method and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117185.0A CN102208702B (en) | 2011-05-06 | 2011-05-06 | Battery charging method and electronic device |
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| CN102208702A CN102208702A (en) | 2011-10-05 |
| CN102208702B true CN102208702B (en) | 2014-06-18 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931693B (en) * | 2011-08-10 | 2014-12-10 | 联发科技（新加坡）私人有限公司 | Battery charging control method and device and charging system and portable device. |
| CN103000965B (en) | 2012-11-23 | 2015-04-29 | 华为终端有限公司 | Charging method and charger |
| EP3005527B1 (en) * | 2013-06-03 | 2018-03-14 | Mediatek Inc. | Method, device, and adaptor for dynamically adjusting charging current of adaptor to achieve thermal protection and fast charging |
| PT3101770T (en) * | 2014-01-28 | 2019-07-12 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Power adapter and terminal |
| CN103746434B (en) | 2014-01-28 | 2016-04-06 | 广东欧珀移动通信有限公司 | Charging method and system |
| CN105244942A (en) * | 2015-09-30 | 2016-01-13 | 深圳天珑无线科技有限公司 | Charging current control method and mobile terminal |
| CN105429213B (en) * | 2015-11-30 | 2019-01-18 | 深圳市沃特沃德股份有限公司 | System, the method that a kind of mobile terminal and its charging current are adjusted |
| CN105743163B (en) * | 2016-02-26 | 2019-07-12 | 上海与德通讯技术有限公司 | Charger whether the detection method and adaptive charging method of standard configuration |
| CN105790362A (en) * | 2016-04-12 | 2016-07-20 | 广东欧珀移动通信有限公司 | Battery charging management method and device and user device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655420A (en) * | 2005-01-14 | 2005-08-17 | 夏汉忠 | Charge method for lead-acid storage battery and charger thereof |
| CN101546916A (en) * | 2008-03-27 | 2009-09-30 | 立锜科技股份有限公司 | Battery charger and method for controlling same |
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- 2011-05-06 CN CN201110117185.0A patent/CN102208702B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655420A (en) * | 2005-01-14 | 2005-08-17 | 夏汉忠 | Charge method for lead-acid storage battery and charger thereof |
| CN101546916A (en) * | 2008-03-27 | 2009-09-30 | 立锜科技股份有限公司 | Battery charger and method for controlling same |
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