CN102944845B - The method and system of battery electric quantity is detected in the constant-voltage charge process of mobile terminal - Google Patents
The method and system of battery electric quantity is detected in the constant-voltage charge process of mobile terminal Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 102
- 230000005611 electricity Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000011897 real-time detection Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 9
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Abstract
The invention discloses a kind of method and system detecting battery electric quantity in the constant-voltage charge process of mobile terminal.After entering constant-voltage charge process by mobile terminal, current battery charge is increased fixing charge value, until current battery charge equals predetermined battery electric quantity every the schedule time; Be maximum cut-off current by Register Set current expiration electric current, current expiration electric current is deducted fixed current value, when current expiration electric current does not reach minimum cut-off current, the size of the current charging current of real-time judge and current expiration electric current, when detecting that current charging current equals current expiration electric current, inquire about the relation table of charging current and the battery electric quantity prestored, draw current battery charge; Again current expiration electric current is deducted described fixed current value, until current expiration electric current reaches minimum cut-off current complete charging.The present invention well achieves the accurate detection to battery electric quantity in mobile terminal constant-voltage charge process, and detection method is simple, and cost is lower.
Description
Technical field
The present invention relates to field of mobile equipment, in particular a kind of method and system detecting battery electric quantity in the constant-voltage charge process of mobile terminal.
Background technology
The charging process of mobile phone is divided into three processes, precharge, constant-current charge and constant-voltage charge.When mobile phone terminate constant-current charge enter constant-voltage charge time, although now battery is not full of completely, due to the existence of the internal resistance of cell, cell voltage now has reached the maximum voltage 4.2V of battery.So, when mobile phone enters in the process of constant-voltage charge, only go by cell voltage the method judging battery capacity, correctly cannot judge the battery capacity of battery reality.
Be specifically described for the TCL384461 of Tianjin Lishen Battery below.See Fig. 1, the charge graph of the 200mA/550mA according to Fig. 1, sets up the cell voltage of 200mA charging curve shown in Fig. 2 a and the cell voltage of 550mA charging curve shown in the mapping table of battery electric quantity and Fig. 2 b and the mapping table of battery electric quantity respectively.As can be seen from Figure 1, the charging curve of 550mA is more Zao than the charging curve of 200mA enters constant-voltage charge process, for the charging curve of 550mA, when mobile phone terminate constant-current charge enter constant voltage fill time, although now electricity only has 83%, voltage reaches 4.2V.So, when mobile phone enters in the process of constant-voltage charge, only go by cell voltage the method judging battery capacity, correctly cannot judge the battery capacity of battery reality.
Moreover, although interruption can be produced by setting different cut-off currents, and then battery electric quantity when judging constant-voltage charge process, but this mode can not make correct judgement to battery electric quantity.For 550mA charging curve, after mobile phone enters constant-voltage charge process, charging current starts to reduce gradually from 550mA, until maximum cut-off current 200mA, in this process, cell voltage is constant in 4.2V, but cannot the battery electric quantity of sensing range between [83%, 94%], battery electric quantity directly can jump to 94% from 83%, make the display of battery electric quantity produce deviation, affect Consumer's Experience.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of method and system detecting battery electric quantity in the constant-voltage charge process of mobile terminal.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A method for battery electric quantity is detected, comprising following steps in the constant-voltage charge process of mobile terminal:
A, mobile terminal preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
B, mobile terminal enter constant-voltage charge process, and current battery charge increase is used for the fixing charge value correcting current battery charge every the schedule time by the basis of described first battery electric quantity, until current battery charge equals described second battery electric quantity;
C, be described maximum cut-off current by Register Set current expiration electric current, described current expiration electric current deducted fixed current value, and judges whether current expiration electric current reaches described minimum cut-off current;
D, when current expiration electric current does not reach described minimum cut-off current, the size of the current charging current of real-time judge and current expiration electric current, when detecting that current charging current equals current expiration electric current, inquire about the relation table of charging current and the battery electric quantity prestored, draw current battery charge;
E, again current expiration electric current is deducted described fixed current value, perform step D, until complete charging when current expiration electric current reaches described minimum cut-off current.
The described method detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, the schedule time in described step B is according to following formulae discovery:
T
0= Q
0T /（Q
2-Q
1）
Wherein, T
0represent the described schedule time, Q
0represent described fixing charge value, Q
1represent described first battery electric quantity when constant-voltage charge process starts, Q
2show described second battery electric quantity when charging current in constant-voltage charge process reaches maximum cut-off current, T represents that in constant-voltage charge process, charging current reaches the duration of charging of maximum cut-off current.
The described method detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, described step B also comprises: arrange a timer, and the timing setting described timer is the described schedule time.
The described method detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, described step B also comprises: when current battery charge is not equal to described second battery electric quantity, timer described in initialization, and reclocking, current battery charge is increased described fixing charge value when reaching the timing of described timer.
The described method detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, described step D also comprises:
The size of the current charging current of real-time detection and current expiration electric current, when current charging current equals current expiration electric current, power supply supervision unit produces and interrupts.
In the constant-voltage charge process of mobile terminal, detect a system for battery electric quantity, wherein, described system comprises:
Pre-set module, preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
First electricity processing module, is used for current battery charge increase the fixing charge value correcting current battery charge every the schedule time on the basis at described first battery electric quantity, until current battery charge equals described second battery electric quantity;
Cut-off current setting module, for by Register Set current expiration electric current, deducts fixed current value by described current expiration electric current,
Second electricity processing module, for the size of the current charging current of real-time judge and current expiration electric current, and when detecting that current charging current equals current expiration electric current, inquiring about the relation table of charging current and the battery electric quantity prestored, upgrading current battery charge.
The described system detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, described system also comprises timer, for setting the described schedule time.
The described system detecting battery electric quantity in the constant-voltage charge process of mobile terminal, wherein, described system also comprises interruption generation module, for when described second electricity processing module detects that current charging current equals current expiration electric current, controls power supply supervision unit and produces interruption.
The method and system detecting battery electric quantity in the constant-voltage charge process of mobile terminal provided by the present invention, well achieve the accurate detection to battery electric quantity in mobile terminal constant-voltage charge process, overcome the problem of battery electric quantity saltus step in existing constant-voltage charge process, and detection method is simple, by software simulating, cost is lower.
Accompanying drawing explanation
Fig. 1 is the charging curve of prior art one battery 200mA and 550mA.
Fig. 2 a and Fig. 2 b is the mapping table of the cell voltage that draws of two charging curves according to Fig. 1 and battery electric quantity respectively.
Fig. 3 is the method flow diagram detecting battery electric quantity in the constant-voltage charge process of mobile terminal provided by the invention.
Fig. 4 provided by the inventionly detects the charge capacity of a preferred embodiment and the relation table of battery electric quantity in the method for battery electric quantity in the constant-voltage charge process of mobile terminal.
Fig. 5 is the process flow diagram detecting another preferred embodiment in the method for battery electric quantity in the constant-voltage charge process of mobile terminal provided by the invention.
Fig. 6 is the structural representation detecting the system of battery electric quantity in the constant-voltage charge process of mobile terminal provided by the invention.
Fig. 7 is the structural representation detecting a preferred embodiment of the system of battery electric quantity in the constant-voltage charge process of mobile terminal provided by the invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of method detecting battery electric quantity in the constant-voltage charge process of mobile terminal, as shown in Figure 3, comprise the following steps:
Step S100, mobile terminal preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
Step S200, mobile terminal enter constant-voltage charge process, current battery charge increase is used for the fixing charge value correcting current battery charge every the schedule time by the basis of described first battery electric quantity, until current battery charge equals described second battery electric quantity;
Step S300, be described maximum cut-off current by Register Set current expiration electric current, described current expiration electric current deducted fixed current value, and judges whether current expiration electric current reaches described minimum cut-off current;
Step S400, when current expiration electric current does not reach described minimum cut-off current, the size of the current charging current of real-time judge and current expiration electric current, when detecting that current charging current equals current expiration electric current, inquire about the relation table of charging current and the battery electric quantity prestored, draw current battery charge;
Step S500, again current expiration electric current is deducted described fixed current value, perform step S400, until complete charging when current expiration electric current reaches described minimum cut-off current.
Below in conjunction with specific embodiment, above-mentioned steps is described in detail.The first battery electric quantity when each battery constant-voltage charge process starts, being fixing entering the second battery electric quantity when the maximum cut-off current in constant-voltage charge process, minimum cut-off current and charging current reach maximum cut-off current, can mode measuring by experiment.The present embodiment is described for the TCL384461 of Tianjin Lishen Battery, as shown in Figure 4, first sets the first battery electric quantity Q when mobile phone enters constant-voltage charge process
1=83%, the minimum cut-off current 50mA in constant-voltage charge process, maximum cut-off current is 200mA, and the second battery electric quantity Q when charging current reaches maximum cut-off current 200mA
2=94%.Record through test, mobile phone reaches the duration of charging T=16 minute needed for maximum cut-off current to charge capacity from constant-voltage charge process simultaneously.
The present embodiment achieves the fixing charge value of increase of each schedule time by step S200, and particularly, setting particular charge is 1%, and the schedule time is by following formulae discovery:
T
0= Q
0T /（Q
2-Q
1）
Wherein, T
0represent the described schedule time, Q
0represent described fixing charge value.T can be calculated by above-mentioned formula
0=1% × 16 × 60/(94%-83%)=87 seconds.Therefore, step S200 realizes, every 87 seconds, current battery charge Q is increased by 1%.Particularly, set the above-mentioned schedule time by arranging a timer, the timing t of above-mentioned timer is set as 87 seconds.
Increased by the battery electric quantity of 1% every 87 seconds, until current battery charge Q reaches the second battery electric quantity that is 94%, all initialization is carried out to timer, reclocking when increasing at every turn.
Further, when current battery charge reaches 94%, be maximum cut-off current and 200mA by Register Set cut-off current, now, power supply supervision unit PMU can produce interruption, to point out charging current to be 200mA.By register, described current expiration electric current K is being deducted fixed current value afterwards, this fixed current value is set as 10mA, but is not limited to 10mA.Now current expiration electric current is 190mA, and along with the carrying out of constant-voltage charge process, charged electrical fails to be convened for lack of a quorum and reduces gradually, until current charging current equals current expiration electric current and 190mA, now, power supply supervision unit produces and interrupts, and points out current charging current to be 190mA.Can draw current battery charge by the relation table searching charging current and the battery electric quantity prestored, as shown in Figure 5, can draw from table, current battery charge is 94% to the relation table of charging current and battery electric quantity, upgrades battery electric quantity.
The present embodiment adopt register be MBCCTRL7, set cut-off current time, by the bit of software design patterns register MBCCTRL7, from 0000 to 1111, respectively represent cut-off current from 50mA, 60mA ..., 190mA, 200mA.
After the renewal carrying out first time battery electric quantity, continuing through Register Set cut-off current is 180mA, 170mA etc., and when charging current equals cut-off current, produced by power supply supervision unit and interrupt, point out current charging current, and the relation table searching charging current and battery electric quantity draws current battery charge, carry out the renewal of battery electric quantity, until the cut-off current of setting equals minimum cut-off current 50mA.Now, battery is full of completely, and battery electric quantity is 100%, completes constant-voltage charge process.
The PMU of the present embodiment adopts the MAX8986 of Maxim company, and it allows the maximum cut-off current arranged to be 200mA, and the present embodiment adopts PMU only for describing the process of above-mentioned detection battery electric quantity, does not limit the present invention.
By above-mentioned steps, can well realize, to the accurate detection of battery electric quantity in mobile terminal constant-voltage charge process, overcoming the problem of battery electric quantity saltus step in existing constant-voltage charge process, and detection method is simple, by software simulating, cost is lower.
Based on the method detecting battery electric quantity in the constant-voltage charge process of mobile terminal that the invention described above provides, present invention also offers a kind of system detecting battery electric quantity in the constant-voltage charge process of mobile terminal, as shown in Figure 6, shown system comprises:
Pre-set module 10, preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
First electricity processing module 20, is used for current battery charge increase the fixing charge value correcting current battery charge every the schedule time on the basis at described first battery electric quantity, until current battery charge equals described second battery electric quantity;
Cut-off current setting module 30, for by Register Set current expiration electric current, deducts fixed current value by described current expiration electric current,
Second electricity processing module 40, for the size of the current charging current of real-time judge and current expiration electric current, and when detecting that current charging current equals current expiration electric current, inquiring about the relation table of charging current and the battery electric quantity prestored, upgrading current battery charge.
Further, as shown in Figure 7, shown system also comprises the timer 50 for setting the described schedule time, and for detecting that when described second electricity processing module 40 current charging current controls power supply supervision unit when equaling current expiration electric current and produces the interruption generation module 60 interrupted.
Provided by the invention in the constant-voltage charge process of mobile terminal the mobile terminal detected in the method and system of battery electric quantity be not limited to mobile phone, also can be used for other mobile devices, such as notebook computer, panel computer, digital camera etc.
In sum, the method and system detecting battery electric quantity in the constant-voltage charge process of mobile terminal provided by the invention.After entering constant-voltage charge process by mobile terminal, current battery charge is increased fixing charge value, until current battery charge equals predetermined battery electric quantity every the schedule time; Be maximum cut-off current by Register Set current expiration electric current, current expiration electric current is deducted fixed current value, when current expiration electric current does not reach minimum cut-off current, the size of the current charging current of real-time judge and current expiration electric current, when detecting that current charging current equals current expiration electric current, inquire about the relation table of charging current and the battery electric quantity prestored, draw current battery charge; Again current expiration electric current is deducted described fixed current value, until current expiration electric current reaches minimum cut-off current complete charging.The present invention well achieves the accurate detection to battery electric quantity in mobile terminal constant-voltage charge process, and detection method is simple, and cost is lower.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (8)
1. in the constant-voltage charge process of mobile terminal, detect a method for battery electric quantity, it is characterized in that, comprise the following steps:
A, mobile terminal preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
B, mobile terminal enter constant-voltage charge process, and current battery charge increase is used for the fixing charge value correcting current battery charge every the schedule time by the basis of described first battery electric quantity, until current battery charge equals described second battery electric quantity;
C, be described maximum cut-off current by Register Set current expiration electric current, described current expiration electric current deducted fixed current value, and judges whether current expiration electric current reaches described minimum cut-off current;
D, when current expiration electric current does not reach described minimum cut-off current, the size of the current charging current of real-time judge and current expiration electric current, when detecting that current charging current equals current expiration electric current, inquire about the relation table of charging current and the battery electric quantity prestored, draw current battery charge;
E, again current expiration electric current is deducted described fixed current value, perform step D, until complete charging when current expiration electric current reaches described minimum cut-off current.
2. the method detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 1, it is characterized in that, the schedule time in described step B is according to following formulae discovery:
T
0= Q
0T /（Q
2-Q
1）
Wherein, T
0represent the described schedule time, Q
0represent described fixing charge value, Q
1represent described first battery electric quantity when constant-voltage charge process starts, Q
2show described second battery electric quantity when charging current in constant-voltage charge process reaches maximum cut-off current, T represents that in constant-voltage charge process, charging current reaches the duration of charging of maximum cut-off current.
3. the method detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 1, it is characterized in that, described step B also comprises: arrange a timer, and the timing setting described timer is the described schedule time.
4. the method detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 3, it is characterized in that, described step B also comprises: when current battery charge is not equal to described second battery electric quantity, timer described in initialization, and reclocking, current battery charge is increased described fixing charge value when reaching the timing of described timer.
5. the method detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 1, it is characterized in that, described step D also comprises:
The size of the current charging current of real-time detection and current expiration electric current, when current charging current equals current expiration electric current, power supply supervision unit produces and interrupts.
6. in the constant-voltage charge process of mobile terminal, detect a system for battery electric quantity, it is characterized in that, described system comprises:
Pre-set module, preset the first battery electric quantity when constant-voltage charge process starts, and the second battery electric quantity when the minimum cut-off current in constant-voltage charge process, maximum cut-off current and charging current reach maximum cut-off current;
First electricity processing module, is used for current battery charge increase the fixing charge value correcting current battery charge every the schedule time on the basis at described first battery electric quantity, until current battery charge equals described second battery electric quantity;
Cut-off current setting module, for by Register Set current expiration electric current, deducts fixed current value by described current expiration electric current;
Second electricity processing module, for the size of the current charging current of real-time judge and current expiration electric current, and when detecting that current charging current equals current expiration electric current, inquiring about the relation table of charging current and the battery electric quantity prestored, upgrading current battery charge.
7. the system detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 6, it is characterized in that, described system also comprises timer, for setting the described schedule time.
8. the system detecting battery electric quantity in the constant-voltage charge process of mobile terminal according to claim 6, it is characterized in that, described system also comprises interruption generation module, for when described second electricity processing module detects that current charging current equals current expiration electric current, control power supply supervision unit and produce interruption.
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| CN103616551B (en) * | 2013-12-10 | 2016-09-14 | Tcl通讯（宁波）有限公司 | The terminal and cell voltage acquisition methods of cell voltage can be accurately obtained when charging |
| CN104090158A (en) * | 2014-07-04 | 2014-10-08 | 东莞林发电子有限公司 | Charging process indicating system and method |
| CN106483462B (en) * | 2015-08-28 | 2019-09-17 | 炬芯（珠海）科技有限公司 | A kind of measurement method and device of battery charge |
| CN111123127A (en) * | 2019-12-03 | 2020-05-08 | 浙江捷创智能技术有限公司 | Function fitting and electric quantity prediction method for lithium battery charging electric quantity |
| CN112937366B (en) * | 2019-12-10 | 2023-09-08 | 北汽福田汽车股份有限公司 | Battery charging method and device and vehicle |
| CN111562507B (en) * | 2020-04-30 | 2021-12-14 | 歌尔科技有限公司 | Battery electric quantity display method and device, electronic equipment and storage medium |
| CN112595983B (en) * | 2021-03-03 | 2021-06-25 | 深圳市晶讯技术股份有限公司 | Charging electric quantity determination method and device, processor and storage medium |
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| CN1955752A (en) * | 2005-10-24 | 2007-05-02 | 中兴通讯股份有限公司 | Method for monitoring charging process of battery of mobile terminal |
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