CN102904290B - Electronic device and method for judging whether battery is charged fully or not - Google Patents
Electronic device and method for judging whether battery is charged fully or not Download PDFInfo
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- CN102904290B CN102904290B CN201110209556.8A CN201110209556A CN102904290B CN 102904290 B CN102904290 B CN 102904290B CN 201110209556 A CN201110209556 A CN 201110209556A CN 102904290 B CN102904290 B CN 102904290B
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Abstract
An electronic device is connected with a charger and comprises a battery, a load, a charging circuit, a detection circuit and a comparison circuit. The charging circuit is used for receiving supply current from the charger and utilizing part of the supply current as charging current to charge the battery while utilizing the other part of the supply current as load current to supply for the load. The detection circuit is used for detecting the supply current and the load current. The comparison circuit is used for computing current difference between the supply current and the load current and judging whether the current difference is larger than a current reference value or not. The invention further provides a method for judging whether the battery is charged fully or not. Through the electronic device and the method, whether the battery is charged fully or not is judged accurately by judging whether the current difference of the supply current and the load current is larger than the current reference value or not.
Description
Technical field
The present invention relates to electronic installation, particularly relate to a kind of electronic installation and judge the method that battery is full of.
Background technology
User needs to charge to the battery of mobile phone when the battery electric quantity of mobile phone is not enough, is beneficial to mobile phone and can continues to use.In the process of charging to the battery of mobile phone, how accurately judging whether battery of mobile phone is full of is a vital problem.
Because judge that the error whether battery is full of is comparatively large, so common way judges whether battery is full of according to charger current according to cell voltage.But due to mobile phone power-on charge time, charger is not only battery and provides charging current, also to provide electric current for the system consumption of mobile phone, therefore the charger current that detects under charged state of starting shooting is just by system consumption electric current and flow to battery current two parts and form, if now judge whether battery is full of with charger current, then error can be produced.Particularly smart mobile phone, require that the function provided is different according to user, required system consumption electric current also can be different, if still judge whether battery is full of according to existing method, the error produced will be larger, thus affect greatly the use of battery and smart mobile phone.Such as, suppose that cell phone system power consumption is 160mA, the electric current flowing to battery when battery is full of is 40mA, judge that the current reference value that battery is full of is 200mA, if user opens WIFI function or background light brightness degree is set to 4 while mobile phone charging, then cell phone system power consumption may increase to 190mA by original 160mA, the charger current so read may minimum value be 190+40=230mA, larger than default value 200mA, although battery reality will be caused so to be full of, but because charger current does not reach current reference value, charger still continues battery charging thus causes over-charging of battery, affect the useful life of battery, although user's start charging on the other hand, but because close Bluetooth function or background light brightness degree be set to 0, then system power consumption may be reduced to 140mA by original 160mA, with the criterion of 200mA, the electric current now flowing to battery is 200-140=60mA, namely just think when flowing to battery current and being 60mA that battery has been full of stopping and has charged, result causes battery underfill, thus shortens the service time of the rear mobile phone of once charging.
Therefore, be necessary that providing a kind of accurately can judge the method whether battery is full of.
Summary of the invention
In view of this, the invention provides a kind of electronic installation, can judge whether battery is full of exactly.
In addition, the present invention also provides a kind of electronic installation to judge the method that battery is full of, and can judge whether battery is full of exactly.
The electronic installation provided in the invention process method, comprises battery, load, charging circuit, testing circuit, comparison circuit.Charging circuit is used for receiving supply current from described charger, and utilize the part in described supply current to charge to described battery as charging current, utilize the another part in described supply current to power to described load as load current simultaneously.Testing circuit is for detecting described supply current and load current.Comparison circuit for calculating the current differential of described supply current and described load current, and judges whether described current differential is greater than current reference value.Wherein, when described current differential is greater than described current reference value, described charging circuit is determined described battery underfill and is continued to charge to described battery; When described current differential is less than or equal to described current reference value, described charging circuit determines that described battery is full of and stops charging to described battery.
Preferably, described current reference value refers to that described battery is full of the electric current of the described battery of rear inflow.
Preferably, described current differential refers to the electric current flowing into described battery in described supply current.
Preferably, described testing circuit is also for detecting the voltage of described battery, described comparison circuit is also for judging whether the voltage of described battery is greater than preset voltage value, and described charging circuit also charges to described battery for continuing when the voltage of described battery is greater than described preset voltage value.
The electronic installation provided in the invention process method judges to comprise the following steps the method that battery is full of: receive supply current from charger, and utilizes described supply current to charge to described battery and for the current drain of described load; Detect described supply current and described load current; Calculate the current differential of described supply current and described load current; Judge whether described current differential is greater than current reference value; If described current differential is greater than described current reference value, then determines described battery underfill and continue to charge to described battery; Or, if described current differential is less than or equal to described current reference value, then determine that described battery is full of and stops charging to described battery.
Preferably, described current reference value refers to that described battery is full of the electric current of the described battery of rear inflow.
Preferably, described current differential refers to the electric current flowing into described battery in described supply current.
Preferably, described from charger receive supply current, and utilize described supply current to charge to described battery and for described load current drain after, further comprising the steps of: the voltage detecting described battery; Judge whether the voltage of described battery is greater than preset voltage value; If be greater than described preset voltage value, then continue to charge to described battery.
Electronic installation in embodiment of the present invention and judge the method that battery is full of, by calculating and judging current differential (the i.e. actual electric current flowing into battery of supply current and load current, also be charging current) whether be greater than current reference value, accurately judge whether battery is full of.
Accompanying drawing explanation
Fig. 1 is the applied environment figure of electronic installation of the present invention and the circuit structure diagram of an execution mode.
Fig. 2 is the flow chart that electronic installation of the present invention judges method one execution mode that battery is full of.
Main element symbol description
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Fig. 1 is the environment map of electronic installation 100 of the present invention and the circuit structure diagram of an execution mode.In the present embodiment, electronic installation 100 can be the electronic installation such as mobile phone, e-book.Electronic installation 100 comprises battery 100a and load 100b.When electronic installation 100 is not connected to charger 200, battery 100a provides electric energy for the current drain of load 100b.When electronic installation 100 is connected to charger 200, electronic installation 100 receives the electric energy from charger 200, and using the current drain of the part in this electric energy as load 100b.
In the present invention one specific embodiment, when electronic installation 100 is connected to charger 200, electronic installation 100 enables charge function automatically, electronic installation 100 receives the supply current from charger 200, and be that battery 100a charges using the part in this supply current as charging current, using the another part in this supply current as the current drain of load current for load 100b.In charging process, electronic installation 100 constantly detects the voltage of battery 100a, when the voltage of battery 100a is greater than preset voltage value, as continued to reach Preset Time, as 2 minutes to battery 100a charging during 4.1V.Then, electronic installation 100 detects the current supply current from charger 200, and wherein supply current comprises the charging current of current inflow battery 100a and the load current flowing into load 100b.Subsequently, charge function cancelled by electronic installation 100, suspends and charges to battery 100a, and detect now from the supply current of charger 200, because supply current is now only for the current drain for load 100b, therefore, now from supply current and the load current of charger 200.
Electronic installation 100 calculates the current differential of supply current and load current, and judges whether current differential is greater than current reference value, as 28.6mA.Wherein, namely described current differential is the electric current flowing into battery 100a in supply current, and described current reference value refers to that battery 100a is full of the electric current of rear inflow battery 100a.When current differential is greater than current reference value, electronic installation 100 is determined battery 100a underfill and is continued to charge to battery 100a.When current differential is less than or equal to current reference value, electronic installation 100 determines that battery 100a has been full of and has stopped charging to battery 100a.
It should be noted that, current reference value in embodiment of the present invention is the current value corresponding with the specification of battery, such as one piece of capacity C is the battery of 1430mA, can think that battery is full of if indicate in the specifications of this battery when flowing to when battery current is less than 0.02C, then current reference value is 0.02*C=0.02 × 1430 ≡ 28.6mA.
In the specific embodiment of the invention, electronic installation 100 also comprises charging circuit 102, testing circuit 104, comparison circuit 106.
Charging circuit 102 for receiving supply current from charger 200, and utilizes the part in supply current to charge to battery 100a as charging current, utilizes the another part in supply current to power to load 100b as load current simultaneously.
Testing circuit 104 is for detecting supply current and load current;
Comparison circuit 106 for calculating the current differential of supply current and load current, and judges whether current differential is greater than current reference value.
When current differential is greater than current reference value, charging circuit 102 is determined battery 100a underfill and is continued to charge to battery 100a; When current differential is less than or equal to current reference value, charging circuit 102 determines that battery 100a is full of and stops charging to battery.
As a further improvement on the present invention, testing circuit 104 is also for detecting the voltage of battery 100a, comparison circuit 106 is also for judging whether the voltage of battery 100a is greater than preset voltage value (as 4.1V), and charging circuit 102 also reaches Preset Time (as 2 minutes) for continuing when the voltage of battery 100a is greater than preset voltage value to battery 100a charging.
Therefore, electronic installation 100 and judge the method that battery is full of in embodiment of the present invention, by calculating and judging current differential (the i.e. actual electric current flowing into battery 100a of supply current and load current, also be charging current) whether be greater than current reference value, accurately judge whether battery 100a is full of.
Fig. 2 is the flow chart that electronic installation 100 of the present invention judges method one execution mode that battery is full of.
In step S100, when electronic installation 100 is connected to charger 200, charging circuit 102 enables charge function automatically, receives supply current from charger 200, and utilizes supply current to charge to battery 100a and for the current drain of load 100b.It should be noted that the growth along with the charging interval, the electric energy that battery 100a obtains is more, and the voltage V of battery 100a constantly becomes large, and the charging current received from charger 200 constantly diminishes.
In step S102, testing circuit 104 detects the voltage V of battery 100a.
In step S104, comparison circuit 106 judges whether voltage V is greater than preset voltage value, as 4.1V, if not, then gets back to step S100, if so, then performs step S106.
In step S106, charging circuit 102 continues to reach preset time T, as 2 minutes to battery 100a charging.
When length has reached Preset Time when charging, in step S108, testing circuit 104 detects the supply current I received from charger 200
1.
In step S110, charge function cancelled by charging circuit 102, and testing circuit 104 detects the load current I received from charger 200
2.
In step S112, comparison circuit 106 calculates supply current I
1with load current I
2current differential Δ I, and judge whether Δ I is greater than current reference value I
def, if so, then perform step S106, if not, then perform step S114.
In step S114, charging circuit 102 determines that battery 100a has been full of and has stopped charging to this battery 100a.
Therefore, electronic installation 100 and judge the method that battery is full of in embodiment of the present invention, by calculating and judging current differential (the i.e. actual electric current flowing into battery 100a of supply current and load current, also be charging current) whether be greater than current reference value, accurately judge whether battery 100a is full of.
Claims (4)
1. an electronic installation, is connected to charger, comprises battery and load, it is characterized in that, described electronic installation also comprises:
Charging circuit, for receiving supply current from described charger, and utilize the part in described supply current to charge to described battery as charging current, utilize the another part in described supply current to power to described load as load current simultaneously;
Testing circuit, for detecting described supply current and load current;
Comparison circuit, for calculating the current differential of described supply current and described load current, and judges whether described current differential is greater than current reference value;
Wherein, described testing circuit is also for detecting the voltage of described battery, described comparison circuit is also for judging whether the voltage of described battery is greater than preset voltage value, described charging circuit also charges to described battery for continuing when the voltage of described battery is greater than described preset voltage value, described testing circuit detects described supply current when also arriving Preset Time for the charging interval after being greater than described preset voltage value when the voltage of described battery, described charging circuit also stops charging to described battery after detecting described supply current at described testing circuit, described testing circuit also for detecting described load current after described charging circuit stopping is charged to described battery, described current differential refers to the electric current flowing into described battery in described supply current, when described current differential is greater than described current reference value, described charging circuit is determined described battery underfill and is continued to charge to described battery, when described current differential is less than or equal to described current reference value, described charging circuit determines that described battery is full of and stops charging to described battery.
2. electronic installation as claimed in claim 1, it is characterized in that, described current reference value refers to that described battery is full of the electric current of the described battery of rear inflow.
3. electronic installation judges the method that battery is full of, and described electronic installation comprises battery and load, it is characterized in that, described electronic installation judges that the method that battery is full of comprises the following steps:
Receive supply current from charger, and utilize described supply current to charge to described battery and for the current drain of described load;
Detect the voltage of described battery;
Judge whether the voltage of described battery is greater than preset voltage value;
If be greater than described preset voltage value, then continue to charge to described battery;
Judge to continue whether Preset Time is reached to the time that described battery charges;
If arrival Preset Time, then detect described supply current;
Stop charging to described battery;
Detect described load current;
Calculate the current differential of described supply current and described load current;
Judge whether described current differential is greater than current reference value, described current differential refers to the electric current flowing into described battery in described supply current;
If described current differential is greater than described current reference value, then determines described battery underfill and continue to charge to described battery; Or
If described current differential is less than or equal to described current reference value, then determine that described battery is full of and stops charging to described battery.
4. electronic installation as claimed in claim 3 judges to it is characterized in that the method that battery is full of, and described current reference value refers to that described battery is full of the electric current of the described battery of rear inflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110209556.8A CN102904290B (en) | 2011-07-25 | 2011-07-25 | Electronic device and method for judging whether battery is charged fully or not |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110209556.8A CN102904290B (en) | 2011-07-25 | 2011-07-25 | Electronic device and method for judging whether battery is charged fully or not |
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| Publication Number | Publication Date |
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| CN102904290A CN102904290A (en) | 2013-01-30 |
| CN102904290B true CN102904290B (en) | 2015-02-04 |
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| CN201110209556.8A Expired - Fee Related CN102904290B (en) | 2011-07-25 | 2011-07-25 | Electronic device and method for judging whether battery is charged fully or not |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471003A (en) * | 2014-08-26 | 2016-04-06 | 深圳富泰宏精密工业有限公司 | Charging circuit |
| CN105896645B (en) * | 2016-03-23 | 2019-01-25 | Oppo广东移动通信有限公司 | The charge function detection method of mobile terminal, apparatus and system |
| CN106532876B (en) | 2017-01-13 | 2020-07-07 | Oppo广东移动通信有限公司 | Power supply control method and device and computer equipment |
| CN107085935A (en) * | 2017-05-27 | 2017-08-22 | 环球智达科技（北京）有限公司 | closing control method |
| CN107123256A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Detect judgment means |
| CN107170226A (en) * | 2017-05-27 | 2017-09-15 | 环球智达科技（北京）有限公司 | The detection determination methods of closing control |
| CN107230341A (en) * | 2017-05-27 | 2017-10-03 | 环球智达科技（北京）有限公司 | Open the detection determination methods of control |
| CN107123255A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Method for controlling opening and closing |
| CN107065587A (en) * | 2017-05-27 | 2017-08-18 | 环球智达科技（北京）有限公司 | Control device |
| CN111038332A (en) * | 2019-12-12 | 2020-04-21 | 中车株洲电力机车有限公司 | Energy storage element charging control method and system and locomotive |
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| CN1750687A (en) * | 2004-09-15 | 2006-03-22 | 乐金电子(中国)研究开发中心有限公司 | Charging current compensating device and method of mobile communication terminal |
| CN101099280A (en) * | 2005-01-06 | 2008-01-02 | 日本电气株式会社 | Mobile telephone terminal charging control device and charging control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05199674A (en) * | 1992-01-18 | 1993-08-06 | Japan Storage Battery Co Ltd | Method for charging battery |
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Patent Citations (4)
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| CN1750687A (en) * | 2004-09-15 | 2006-03-22 | 乐金电子(中国)研究开发中心有限公司 | Charging current compensating device and method of mobile communication terminal |
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| CN101682202A (en) * | 2007-06-06 | 2010-03-24 | 丰田自动车株式会社 | Power supply unit of vehicle |
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| JP特開平5-199674A 1993.08.06 * |
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| CN102904290A (en) | 2013-01-30 |
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Effective date of registration: 20180302 Address after: Shanghai City, Songjiang Export Processing Zone South Road No. 1925 Patentee after: Ambit Microsystems (Shanghai) Ltd. Address before: 201613 Shanghai City, Songjiang District Shanghai city south of Songjiang Export Processing Zone Road No. 1925 Co-patentee before: HON HAI PRECISION INDUSTRY Co.,Ltd. Patentee before: Ambit Microsystems (Shanghai) Ltd. |
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