CN102904290A - 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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- CN102904290A CN102904290A CN2011102095568A CN201110209556A CN102904290A CN 102904290 A CN102904290 A CN 102904290A CN 2011102095568 A CN2011102095568 A CN 2011102095568A CN 201110209556 A CN201110209556 A CN 201110209556A CN 102904290 A CN102904290 A CN 102904290A
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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, relate in particular to the method that a kind of electronic installation judges that battery is full of.
Background technology
The user need to charge to the battery of mobile phone when the battery electric quantity deficiency of mobile phone, is beneficial to mobile phone and can continues to use.In the process that the battery to mobile phone charges, how to judge accurately that whether battery of mobile phone is full of is a vital problem.
Because judge that according to cell voltage the error whether battery be full of is larger, so common way is to judge according to charger current whether battery is full of.But during owing to the mobile phone power-on charging, charger not only provides charging current for battery, also to provide electric current for the system consumption of mobile phone, therefore detected charger current is just by the system consumption electric current and flow to battery current two parts and consist of under the charged state of starting shooting, if judge that with charger current whether battery is full of, and then can produce error this moment.Smart mobile phone particularly, the function that provides according to customer requirements is different, and required system consumption electric current also can be different, if still judge according to existing method whether battery is full of, the error that produces will be larger, thereby the use of battery and smart mobile phone is affected greatly.For example, suppose that the cell phone system power consumption is 160mA, the electric current that flows to battery when battery is full of is 40mA, judge that the current reference value that battery is full of is 200mA, if the user has opened the WIFI function in cell-phone charging or the background light brightness degree is set to 4, then the cell phone system power consumption may increase to 190mA by original 160mA, the charger current that reads so may minimum value be 190+40=230mA, larger than default value 200mA, although will cause like this battery reality to be full of, but because charger current does not reach current reference value, charger still continues thereby battery charging is caused over-charging of battery, affects the useful life of battery; Although on the other hand user's start charging, but because closed the Bluetooth function or the background light brightness degree is set to 0, then system's power consumption may be reduced to 140mA by original 160mA, criterion with 200mA, the electric current that flow to battery this moment is 200-140=60mA, just think when battery current is 60mA that battery has been full of and stop to have charged namely that the result causes the battery underfill when flowing to, thereby shorten the service time of mobile phone after the once charging.
Therefore, be necessary to provide a kind of and can accurately 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 exactly whether battery is full of.
In addition, the present invention also provides a kind of electronic installation to judge the method that battery is full of, and can judge exactly whether battery is full of.
The electronic installation that provides 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 the described supply current as charging current described battery to be charged, utilize simultaneously the another part in the described supply current as load current described load to be powered.Testing circuit is for detection of described supply current and load current.Comparison circuit is used for calculating the electric current difference of described supply current and described load current, and judges that whether described electric current difference is greater than current reference value.Wherein, when described electric current difference during greater than described current reference value, described charging circuit is determined described battery underfill and continues described battery is charged; When described electric current difference was less than or equal to described current reference value, described charging circuit determined that described battery is full of and stops described battery is charged.
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 electric current difference refers to flow in the described supply current electric current of described battery.
Preferably, described testing circuit is also for detection of the voltage of described battery, whether the voltage that described comparison circuit also is used for judging described battery greater than the predeterminated voltage value, and described charging circuit continues described battery is charged when also being used for voltage when described battery greater than described predeterminated voltage value.
The electronic installation that provides in the invention process method is judged the method that battery is full of, and may further comprise the steps: receive supply current from charger, and utilize described supply current that described battery is charged and for the current drain of described load; Detect described supply current and described load current; Calculate the electric current difference of described supply current and described load current; Judge that whether described electric current difference is greater than current reference value; If described electric current difference, is then determined described battery underfill greater than described current reference value and is continued described battery is charged; Or if described electric current difference is less than or equal to described current reference value, then definite described battery is full of and stops described battery is charged.
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 electric current difference refers to flow in the described supply current electric current of described battery.
Preferably, describedly receive supply current from charger, and utilize described supply current that described battery is charged and for after the current drain of described load, further comprising the steps of: the voltage that detects described battery; Judge that whether the voltage of described battery is greater than the predeterminated voltage value; If greater than described predeterminated voltage value, then continue described battery charging.
The method that electronic installation in the embodiment of the present invention and judgement battery thereof are full of, by electric current difference (the i.e. electric current of reality inflow battery that calculates and judge supply current and load current, also be charging current) whether greater than current reference value, judge accurately whether battery is full of.
Description of drawings
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 is judged method one execution mode that battery is full of.
The main element symbol description
Following embodiment further specifies the present invention in connection 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 installations such as mobile phone, e-book.Electronic installation 100 comprises battery 100a and load 100b.Battery 100a does not provide the current drain of electric energy for load 100b when electronic installation 100 is connected in charger 200.When electronic installation 100 is connected in charger 200, the electric energy that electronic installation 100 receives from charger 200, and with the current drain of the part in this electric energy as load 100b.
In the present invention's one specific embodiment, electronic installation 100 is enabled charge function automatically when electronic installation 100 is connected in charger 200, the supply current that electronic installation 100 receives from charger 200, and be battery 100a charging with the part in this supply current as charging current, with 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 voltages of battery 100a, when the voltage of battery 100a greater than the predeterminated voltage value, continue during such as 4.1V that charging reaches Preset Time to battery 100a, such as 2 minutes.Then, electronic installation 100 detects current supply current from charger 200, and wherein supply current comprises the charging current and the load current that flows into load 100b of current inflow battery 100a.Subsequently, electronic installation 100 cancellation charge functions suspend battery 100a are charged, and detect this moment from the supply current of charger 200, because the supply current of this moment only is used for the current drain for load 100b, so this moment, the supply current from charger 200 was load current.
Need to prove, current reference value in the embodiment of the present invention is the current value corresponding with the specification of battery, battery that capacity C is 1430mA for example, if indicate in the specifications of this battery and can think that when flowing to battery current less than 0.02C battery is full of, 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 is used for receiving supply current from charger 200, and utilizes the part in the supply current as charging current battery 100a to be charged, and utilizes simultaneously the another part in the supply current as load current load 100b to be powered.
Testing circuit 104 is for detection of supply current and load current;
Comparison circuit 106 is used for calculating the electric current difference of supply current and load current, and judges that whether the electric current difference is greater than current reference value.
When electric current difference during greater than current reference value, charging circuit 102 is determined battery 100a underfills and continues battery 100a is charged; When the electric current difference was less than or equal to current reference value, charging circuit 102 definite battery 100a were full of and stop battery being charged.
As a further improvement on the present invention, testing circuit 104 is also for detection of the voltage of battery 100a, whether the voltage that comparison circuit 106 also is used for judging battery 100a greater than predeterminated voltage value (such as 4.1V), and continuation was charged to battery 100a and reached Preset Time (such as 2 minutes) when charging circuit 102 also was used for voltage as battery 100a greater than the predeterminated voltage value.
Therefore, the method that electronic installation 100 and judgement battery thereof are full of in the embodiment of the present invention, by electric current difference (the i.e. electric current of reality inflow battery 100a that calculates and judge supply current and load current, also be charging current) whether greater than current reference value, judge accurately whether battery 100a is full of.
Fig. 2 is the flow chart that electronic installation 100 of the present invention is judged method one execution mode that battery is full of.
At step S100, when electronic installation 100 was connected in charger 200, charging circuit 102 was enabled charge function automatically, received supply currents from charger 200, and utilized supply current that battery 100a is charged and for the current drain of load 100b.Should be noted in the discussion above that the growth along with the charging interval, the electric energy that battery 100a obtains is more, and it is large that the voltage V of battery 100a constantly becomes, and the charging current that receives from charger 200 constantly diminishes.
At step S102, testing circuit 104 detects the voltage V of battery 100a.
At step S104, whether comparison circuit 106 judges voltage V greater than the predeterminated voltage value, such as 4.1V, if not, then gets back to step S100, if, execution in step S106 then.
At step S106, charging reached preset time T to battery 100a in charging circuit 102 continuation, such as 2 minutes.
When the charging duration had reached Preset Time, at step S108, testing circuit 104 detected the supply current I that receives from charger 200
1
At step S110, charging circuit 102 cancellation charge functions, testing circuit 104 detects the load current I that receives from charger 200
2
At step S112, comparison circuit 106 calculates supply current I
1With load current I
2Electric current difference DELTA I, and judge that whether Δ I is greater than current reference value I
DefIf,, execution in step S106 then, if not, execution in step S114 then.
At step S114, charging circuit 102 definite battery 100a have been full of and have stopped this battery 100a is charged.
Therefore, the method that electronic installation 100 and judgement battery thereof are full of in the embodiment of the present invention, by electric current difference (the i.e. electric current of reality inflow battery 100a that calculates and judge supply current and load current, also be charging current) whether greater than current reference value, judge accurately whether battery 100a is full of.
Claims (8)
1. an electronic installation is connected in charger, comprises battery and load, it is characterized in that, described electronic installation also comprises:
Charging circuit, be used for receiving supply current from described charger, and utilize the part in the described supply current as charging current described battery to be charged, utilize simultaneously the another part in the described supply current as load current described load to be powered;
Testing circuit is for detection of described supply current and load current;
Comparison circuit is used for calculating the electric current difference of described supply current and described load current, and judges that whether described electric current difference is greater than current reference value;
Wherein, when described electric current difference during greater than described current reference value, described charging circuit is determined described battery underfill and continues described battery is charged; When described electric current difference was less than or equal to described current reference value, described charging circuit determined that described battery is full of and stops described battery is charged.
2. electronic installation as claimed in claim 1 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 as claimed in claim 2 is characterized in that, described electric current difference refers to flow in the described supply current electric current of described battery.
4. electronic installation as claimed in claim 1, it is characterized in that, described testing circuit is also for detection of the voltage of described battery, whether the voltage that described comparison circuit also is used for judging described battery greater than the predeterminated voltage value, and described charging circuit continues described battery is charged when also being used for voltage when described battery greater than described predeterminated voltage value.
5. an electronic installation is judged 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 may further comprise the steps:
Receive supply current from charger, and utilize described supply current that described battery is charged and for the current drain of described load;
Detect described supply current and described load current;
Calculate the electric current difference of described supply current and described load current;
Judge that whether described electric current difference is greater than current reference value;
If described electric current difference, is then determined described battery underfill greater than described current reference value and is continued described battery is charged; Or
If described electric current difference is less than or equal to described current reference value, then definite described battery is full of and stops described battery is charged.
6. electronic installation as claimed in claim 5 is judged the method that battery is full of, and 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.
7. electronic installation as claimed in claim 6 is judged the method that battery is full of, and it is characterized in that, described electric current difference refers to flow in the described supply current electric current of described battery.
8. electronic installation as claimed in claim 5 is judged the method that battery is full of, it is characterized in that, describedly receive supply current from charger, and utilize described supply current that described battery is charged and for after the current drain of described load, further comprising the steps of:
Detect the voltage of described battery;
Judge that whether the voltage of described battery is greater than the predeterminated voltage value;
If greater than described predeterminated voltage value, then continue described battery charging.
Priority Applications (1)
| 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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| 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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| CN102904290A true CN102904290A (en) | 2013-01-30 |
| CN102904290B CN102904290B (en) | 2015-02-04 |
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Cited By (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 |
| CN105896645A (en) * | 2016-03-23 | 2016-08-24 | 广东欧珀移动通信有限公司 | Charging function detection method, apparatus, and system for mobile terminal |
| CN107065587A (en) * | 2017-05-27 | 2017-08-18 | 环球智达科技（北京）有限公司 | Control device |
| 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 |
| 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 |
| 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 |
| WO2018129973A1 (en) * | 2017-01-13 | 2018-07-19 | 广东欧珀移动通信有限公司 | Power supply control method and apparatus, storage medium, and electronic device |
| WO2021114537A1 (en) * | 2019-12-12 | 2021-06-17 | 中车株洲电力机车有限公司 | Charging control method and system for energy storage element, and locomotive |
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| CN107123256A (en) * | 2017-05-27 | 2017-09-01 | 环球智达科技（北京）有限公司 | Detect judgment means |
| 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 |
| 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 |
| WO2021114537A1 (en) * | 2019-12-12 | 2021-06-17 | 中车株洲电力机车有限公司 | Charging control method and system for energy storage element, and locomotive |
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| CN102904290B (en) | 2015-02-04 |
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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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