CN1540833A - Device of provding variable current for charged battery and method - Google Patents
Device of provding variable current for charged battery and method Download PDFInfo
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- CN1540833A CN1540833A CNA031577083A CN03157708A CN1540833A CN 1540833 A CN1540833 A CN 1540833A CN A031577083 A CNA031577083 A CN A031577083A CN 03157708 A CN03157708 A CN 03157708A CN 1540833 A CN1540833 A CN 1540833A
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Abstract
The invention includes following parts: adapter voltage detection unit, battery voltage detection unit and constant voltage/constant current control circuit. The adapter voltage detection unit is utilized to measure output voltage of adapter, and battery voltage detection unit is for measuring charged voltage of chargeable battery. The constant voltage/constant current control circuit compares magnitudes between measured output voltage of adapter and charged voltage of chargeable battery. If voltage difference between the said output voltage of adapter and charged voltage of chargeable battery is too large, the charging current is controlled in order to meet power consumption of transistor. The invention prevents overheating phenomenon in charging battery and damages of fittings.
Description
Technical field
The present invention relates to a kind of devices and methods therefor that battery charge is changed, especially can measure mobile communication terminal adapter output voltage and cell voltage, and change the charging current of battery according to the difference of two voltages, realize minimized battery charge variset of heating and method thereof.
Background technology
Generally speaking, portable electric appts uses the source of supply of battery as the required power supply of work, battery is to utilize electrochemical reaction that the chemical energy of inner active material is converted to electric energy, it has conclusive effect for starting the information age, to high highly sophisticated products, battery is that all portable type electronic products are indispensable from toy.
But,, thereby cause the use of portable type electronic product to be subjected to many restrictions because there is the restriction of service time in battery.Therefore battery is divided into after the disposable use the just primary cell of waste treatment and can recharges the secondary cell of use repeatedly, secondary cell in Wireless Telecom Equipment such as mobile phone, mobile communication terminal, trunk radio system, wireless data transceiving machine, global positioning system and notebook computer, camcorder in occupation of indispensable critical role.
These portable sets require the lightweight of secondary cell and long-time continuous to use, and for this reason, exploitation is also being used NI-G (Ni-Cd) battery, ni-mh (Ni-MH) battery, lithium ion (Li-ion) battery and lighium polymer (Li-Polymer) battery.Recently generally use and have the extremely lithium ion battery of excellent characteristic at energy density, cycle lie and other aspect of performance.
For above-mentioned secondary cell, carry out charge and discharge repeatedly after, generate solid solution in the position of repeated charge, cause remaining capacity to use, that is, battery produces memory effect, remembers spendable capacity boundary.Therefore, have only to use to the discharge range of battery permission and charge again, could improve the service efficiency of battery.
Recently, the internally-arranged type charging circuit (100) that is built in the mobile communication terminal as shown in Figure 1 is widely used, but there is such problem in the internally-arranged type charging circuit, the transistor (TR) of the DC/DC current transformer (series controller) that uses when promptly the high voltage of its employed AC/DC adapter (Adapter) (110) output may make lithium ion battery (150) charging or field-effect transistor (FET) (120) heating or damage.
The charging of above-mentioned lithium ion battery (150) is to realize handle the back from the supply voltage of AC/DC adapter (110) by field-effect transistor (120) and current sensing resistor (Current sensing resistor) (130).
The charging of at this moment above-mentioned lithium ion battery (150) is to utilize to decide voltage/fixed current controling circuit (140) voltage/deciding the electric current form charges to decide, when battery (150) voltage is low, charge to decide electric current, and after voltage reaches about 4.2 volts, be converted to again and decide voltage system.
In this course, if because of the high power loss (Power dissipation) to transistor or field-effect transistor (120) of voltage of adapter (110) exerts an influence, transistor or field-effect transistor may damage because of overheated causing so.
For example, if transistorized power loss is 1 watt (W), the voltage of adapter is 6 volts, cell voltage is 3 volts, and charging current is 1 ampere (A), and the actual power dissipation born of transistor is 3 watts so, reach 3 times of 1 watt, so, cause transistor damage because generation is overheated.
Summary of the invention
Above-mentioned problem in the past proposes in order to solve just in the present invention, purpose is to provide a kind of battery charge variset and method thereof, in order to measure the adapter output voltage and the cell voltage of mobile communication terminal, and change battery charge according to the difference of two voltages, realize minimizing of heating.
For achieving the above object, the present invention is used to change and the device of controlling battery charge is made of following several sections: the adaptor voltages test section, in order to detect the output voltage of battery charge with adapter; Battery voltage detection portion is in order to detect the charging voltage of rechargeable battery; Decide voltage/fixed current controling circuit, it compares mutually to the size of the charging voltage of the detected battery of output voltage and above-mentioned battery voltage detection portion of the detected adapter of above-mentioned adaptor voltages test section, if the voltage difference between two ends is bigger, then control charging current, to satisfy transistorized power loss.
If the output voltage of the detected adapter of above-mentioned adaptor voltages test section is low, the detected battery charging voltage height of above-mentioned battery voltage detection portion, decide voltage/fixed current controling circuit and control by above-mentioned so, reduce charging current, to satisfy above-mentioned transistorized power loss.
If the output voltage height of the detected adapter of above-mentioned adaptor voltages test section, the detected battery charging voltage of above-mentioned battery voltage detection portion is low, decide voltage/fixed current controling circuit and control by above-mentioned so, increase charging current, to satisfy above-mentioned transistorized power loss.
The present invention changes and the method for control battery charge is made of following several steps: detect the step of battery charge with the adapter output voltage; Detect the step of the charging voltage of rechargeable battery; The step of control charging current, this step compares mutually to the size of above-mentioned detected adapter output voltage and above-mentioned detected battery charging voltage, if the voltage difference between two ends is bigger, then control charging current, to satisfy transistorized power loss.
If the output voltage of above-mentioned detected adapter is low, the charging voltage height of above-mentioned detected battery is controlled so, reduces charging current, to satisfy above-mentioned transistorized power loss.
If the output voltage height of above-mentioned detected adapter, above-mentioned detected battery charging voltage is low, controls so, increases charging current, to satisfy above-mentioned transistorized power loss.
Description of drawings
Fig. 1 is the internally-arranged type charging circuit structured flowchart that is built in the mobile communication terminal in the past.
Fig. 2 is a concise and to the point drawing of using the general structure chart of mobile communication system of the present invention.
Fig. 3 is the internally-arranged type charging circuit structured flowchart in the mobile communication terminal of being built in of the embodiment of the invention.
Fig. 4 is the transistor power loss table of voltage of the present invention and electric current decision.
Fig. 5 is the flow chart that shows the overall workflow of the variable method of the embodiment of the invention-battery charge.
Embodiment
With reference to the accompanying drawings, describe useful embodiment of the present invention in detail.
Fig. 2 is a concise and to the point drawing of using the general structure chart of mobile communication system of the present invention.
Mobile communication system by transceiver with mobile communication terminal (210) (211), a plurality of base station (220a) (220b) ... (220n), a plurality of base station controllers (230a) of control base station (230b) ... (230n) and exchange (240) constitute.
Above-mentioned a plurality of base station (220a) (220b) ... effect (220n) is a switching signal form between transceiver is with mobile communication terminal (210) (211) and exchange (240), to make it to insert Radio Link and wire link.Its measures transceiver with the transceiver electric field strength (electric wave reception intensity) of mobile communication terminal (210) (211) and offer exchange (240).
Above-mentioned a plurality of base station controller (230a) (230b) ... (230n) be the means that connect between each elemental functions of a plurality of base stations and the unit operations person, its function comprises service state, distribution and the formation of the running of a plurality of base stations of management, management of base station hardware and software about the resource of call business, the information of collecting the running of relevant base station, running and monitor the base station, and the relevant lower device of monitoring failure etc.
Above-mentioned exchange (240) to a plurality of base station controllers (230a) (230b) ... (230n) and transceiver provide the circuit switched service with mobile communication terminal (210) (211), as additional function, also have channel and switch (handoff) function.
If any terminal use utilizes transceiver to make a phone call or receive calls with mobile communication terminal (210) (211), so this general mobile communication system then is connected to a plurality of base stations (220a) (220b) ... a certain base station (220n).
Fig. 3 is the internally-arranged type charging circuit structured flowchart in the mobile communication terminal of being built in of the embodiment of the invention.In the transistor (TR) or field-effect transistor (320) of the DC/DC current transformer (series controller) that the high voltage of AC/DC adapter (310) output that internally-arranged type charging circuit (300) uses uses, also be linked into adaptor voltages test section (360) when being linked into lithium ion battery (350) charging.
The charging of above-mentioned lithium ion battery (350) is to realize handle the back from the supply voltage of AC/DC adapter (310) by field-effect transistor (320) and current sensing resistor (330).
The charging of at this moment above-mentioned lithium ion battery (350) is to utilize to decide voltage/fixed current controling circuit (340) voltage/deciding the electric current form charges to decide, when lithium ion battery (350) voltage is low, charge to decide electric current, and after voltage reaches about 4.2 volts, be converted to again and decide voltage system.
The charging voltage of above-mentioned lithium ion battery (350) is detected by battery voltage detection portion (370).
Here Zui Da problem is transistor (a 320) heating problem, and as shown in Figure 4, the heating of above-mentioned transistor (320) is that the charging current by the output voltage of AC/DC adapter (310) and lithium ion battery (350) causes.
As above-mentioned shown in Figure 4, charging current value and cell voltage at lithium ion battery (350) are certain, promptly be respectively under the state of 0.5 ampere and 4 volts, AC/DC adapter (310) if output voltage rise to 8 volts gradually from 5 volts, the power loss value rises to 2 watts gradually from 0.5 watt so.
Charging current value and cell voltage at above-mentioned lithium ion battery (350) are certain, promptly be respectively under the state of 0.8 ampere and 3.5 volts, AC/DC adapter (310) if output voltage rise to 8 volts gradually from 5 volts, the power loss value rises to 3.6 watts gradually from 1.2 watts so.
Charging current value and cell voltage at above-mentioned lithium ion battery (350) are certain, promptly be respectively under the state of 1 ampere and 3 volts, AC/DC adapter (310) if output voltage rise to 8 volts gradually from 5 volts, the power loss value rises to 5 watts gradually from 2 watts so.
Fig. 5 is the flow chart that shows the overall workflow of the variable method of the embodiment of the invention-battery charge.After the entry into service, adaptor voltages test section (360) detects the output voltage (ADVOLT) of (501) AC/DC adapter (310), and battery voltage detection portion (370) detects the charging voltage (BATVOLT) of (502) above-mentioned lithium ion battery (350).
Decide voltage/fixed current controling circuit (340) size of the charging voltage of the detected lithium ion battery (350) of the output voltage of the detected AC/DC adapter (310) of above-mentioned adaptor voltages test section (360) and above-mentioned battery voltage detection portion (370) is compared (503) mutually, if the voltage difference between two ends is bigger, then control, reduce charging current, to satisfy the power loss of transistor (320).
Promptly, if the output voltage of the AC/DC adapter (310) that above-mentioned adaptor voltages test section (360) is detected is low, the charging voltage height of the lithium ion battery (350) that above-mentioned battery voltage detection portion (370) is detected, so above-mentionedly decide voltage/fixed current controling circuit (340) and control, reduce (504) charging current, to satisfy the power loss of above-mentioned transistor (320).
On the contrary, if the output voltage height of the AC/DC adapter (310) that adaptor voltages test section (360) is detected, the charging voltage of the lithium ion battery (350) that above-mentioned battery voltage detection portion (370) is detected is low, so above-mentionedly decide voltage/fixed current controling circuit (340) and control, increase (505) charging current, to satisfy the power loss of above-mentioned transistor (320).
In the present invention, internally-arranged type charging circuit and above-mentioned AC/DC adapter (310) and lithium ion battery (350) just occur as embodiment, even be applied in other multiple externally positioned type charging circuit and various adapter and the battery, action effect of the present invention is identical.
As the above-mentioned detailed description of doing, the present invention is by measuring the adapter output voltage and the cell voltage of mobile communication terminal, and change the charging current of battery according to the difference of two voltages, to realize minimizing of heating, thereby can prevent the superheating phenomenon that when the mobile communication terminal battery charge, takes place, prevent the damage of accessories such as transistor.
Claims (6)
1. battery charge variset, it can change and control the charging current of battery, it is characterized in that being made of following several sections:
The adaptor voltages test section is in order to detect the output voltage of battery charge with adapter;
Battery voltage detection portion is in order to detect the charging voltage of rechargeable battery;
Decide voltage/fixed current controling circuit, it compares mutually to the size of the charging voltage of the detected battery of output voltage and above-mentioned battery voltage detection portion of the detected adapter of above-mentioned adaptor voltages test section, if the voltage difference between two ends is bigger, then control charging current, to satisfy transistorized power loss.
2. battery charge variset according to claim 1 is characterized in that:
If the output voltage of the detected adapter of above-mentioned adaptor voltages test section is low, the charging voltage height of the detected battery of above-mentioned battery voltage detection portion, so above-mentionedly decide voltage/fixed current controling circuit and control, reduce charging current, to satisfy above-mentioned transistorized power loss.
3. battery charge variset according to claim 1 is characterized in that:
If the output voltage height of the detected adapter of above-mentioned adaptor voltages test section, the charging voltage of the detected battery of above-mentioned battery voltage detection portion is low, so above-mentionedly decide voltage/fixed current controling circuit and control, increase charging current, to satisfy above-mentioned transistorized power loss.
4. variable method of battery charge, it can change and control the charging current of battery, it is characterized in that being made of following several steps:
Detect the step of battery charge with the output voltage of adapter;
Detect the step of the charging voltage of rechargeable battery;
The step of control charging current, this step compares mutually to the size of the charging voltage of the output voltage of above-mentioned detected adapter and above-mentioned detected battery, if the voltage difference between two ends is bigger, then control charging current, to satisfy transistorized power loss.
5. the variable method of battery charge according to claim 4 is characterized in that:
If the output voltage of above-mentioned detected adapter is low, the charging voltage height of above-mentioned detected battery is controlled so, reduces charging current, to satisfy above-mentioned transistorized power loss.
6. the variable method of battery charge according to claim 4 is characterized in that:
If the output voltage height of above-mentioned detected adapter, the charging voltage of above-mentioned detected battery is low, controls so, increases charging current, to satisfy above-mentioned transistorized power loss.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20030026514A KR100487622B1 (en) | 2003-04-25 | 2003-04-25 | Device and the Method for variating the charging current of battery |
| KR026514/2003 | 2003-04-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1540833A true CN1540833A (en) | 2004-10-27 |
| CN100353640C CN100353640C (en) | 2007-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031577083A Expired - Fee Related CN100353640C (en) | 2003-04-25 | 2003-08-29 | Device of provding variable current for charged battery and method |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100487622B1 (en) |
| CN (1) | CN100353640C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100444498C (en) * | 2005-02-09 | 2008-12-17 | 恩益禧电子股份有限公司 | Charging control circuit and charging device |
| CN102570546A (en) * | 2011-12-28 | 2012-07-11 | 中兴通讯股份有限公司 | Mobile terminal and charge device and method thereof |
| WO2014110995A1 (en) * | 2013-01-18 | 2014-07-24 | 华为终端有限公司 | Charging method, mobile device, charging device and charging system |
| CN107112790A (en) * | 2014-10-28 | 2017-08-29 | 株式会社Gbs | Charging device, charging procedure, charging method |
| CN107946672A (en) * | 2017-12-01 | 2018-04-20 | 深圳市森树强电子科技有限公司 | A kind of linear lithium battery charging management method and device |
| WO2020097918A1 (en) * | 2018-11-16 | 2020-05-22 | 深圳市欢太科技有限公司 | Method and device for adjusting charge current, and terminal and computer-readable storage medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100782271B1 (en) | 2005-11-28 | 2007-12-04 | 엘지전자 주식회사 | Charging apparatus and method of mobile terminal |
| CN105703430B (en) * | 2011-12-28 | 2018-08-14 | 中兴通讯股份有限公司 | A kind of charging method, mobile terminal, charging equipment and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5703470A (en) * | 1996-05-29 | 1997-12-30 | Motorola, Inc. | Battery charger with power dissipation control |
| US6326769B1 (en) * | 2000-11-29 | 2001-12-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Limitation of power dissipation in Li battery |
| JP2002281686A (en) * | 2001-01-12 | 2002-09-27 | Jeol Ltd | Charging device and method for accumulation power supply |
-
2003
- 2003-04-25 KR KR20030026514A patent/KR100487622B1/en not_active IP Right Cessation
- 2003-08-29 CN CNB031577083A patent/CN100353640C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100444498C (en) * | 2005-02-09 | 2008-12-17 | 恩益禧电子股份有限公司 | Charging control circuit and charging device |
| US9450441B2 (en) | 2011-12-28 | 2016-09-20 | Zte Corporation | Mobile terminal, and device and method for charging same |
| CN102570546A (en) * | 2011-12-28 | 2012-07-11 | 中兴通讯股份有限公司 | Mobile terminal and charge device and method thereof |
| CN102570546B (en) * | 2011-12-28 | 2016-07-27 | 中兴通讯股份有限公司 | A kind of mobile terminal and charger, method |
| US10256647B2 (en) | 2013-01-18 | 2019-04-09 | Huawei Device (Dongguan) Co., Ltd. | Method for charging a mobile device, mobile device, and charging system |
| US9991725B2 (en) | 2013-01-18 | 2018-06-05 | Huawei Device (Dongguan) Co., Ltd. | Charging method, mobile device, charging device, and charging system |
| US10236701B2 (en) | 2013-01-18 | 2019-03-19 | Huawei Device (Dongguan) Co., Ltd. | System, mobile device, and charging device |
| WO2014110995A1 (en) * | 2013-01-18 | 2014-07-24 | 华为终端有限公司 | Charging method, mobile device, charging device and charging system |
| CN107112790A (en) * | 2014-10-28 | 2017-08-29 | 株式会社Gbs | Charging device, charging procedure, charging method |
| CN107946672A (en) * | 2017-12-01 | 2018-04-20 | 深圳市森树强电子科技有限公司 | A kind of linear lithium battery charging management method and device |
| WO2020097918A1 (en) * | 2018-11-16 | 2020-05-22 | 深圳市欢太科技有限公司 | Method and device for adjusting charge current, and terminal and computer-readable storage medium |
| CN112789779A (en) * | 2018-11-16 | 2021-05-11 | 深圳市欢太科技有限公司 | Charging current adjusting method, device, terminal and computer readable storage medium |
| CN112789779B (en) * | 2018-11-16 | 2024-02-27 | 深圳市欢太科技有限公司 | Charging current adjusting method, device, terminal and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040092265A (en) | 2004-11-03 |
| CN100353640C (en) | 2007-12-05 |
| KR100487622B1 (en) | 2005-05-03 |
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Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L Free format text: FORMER OWNER: LG ELECTRONICS (CHINA) R + D CENTER CO., LTD. Effective date: 20120320 |
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Free format text: CORRECT: ADDRESS; FROM: CHAOYANG, BEIJING TO: 264001 YANTAI, SHANDONG PROVINCE |
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Effective date of registration: 20120320 Address after: 264001 No. 228 Changjiang Road, Yantai economic and Technological Development Zone, Shandong, China Patentee after: Langchao Lejin Digital Mobile Communication Co., Ltd. Address before: The two district of Beijing city of Chaoyang District in Wangjing Lize Park No. 203 Petrova building block B Patentee before: LG Electronic (China) Research and Development Center Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |