CN105223504A - A kind of evaluation method of electric quantity of lithium battery and system - Google Patents
A kind of evaluation method of electric quantity of lithium battery and system Download PDFInfo
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- CN105223504A CN105223504A CN201410240673.4A CN201410240673A CN105223504A CN 105223504 A CN105223504 A CN 105223504A CN 201410240673 A CN201410240673 A CN 201410240673A CN 105223504 A CN105223504 A CN 105223504A
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Abstract
The evaluation method of a kind of electric quantity of lithium battery provided by the present invention and system, in real-time detection mobile device, whether power consumption module starts and executes the task, when detecting that the startup of at least one power consumption module is executed the task, then obtain lithium battery execute the task before cell voltage, in process of executing the task, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage, and with above-mentioned data for coordinate points, be indicated in a rectangular coordinate system in space and obtained a current lithium battery voltage characteristic coordinates point, afterwards according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity demarcated in advance.The present invention just carries out battery electric quantity estimation when power consumption module starts and executes the task, and is estimated as the estimation based on voltage response variation tendency, therefore result is more accurate; Estimation process can be realized by software simultaneously, without the need to power management chip, saves equipment cost.
Description
Technical field
The present invention relates to technical field of battery management, in particular a kind of evaluation method of electric quantity of lithium battery and system.
Background technology
In the exploitation of some embedded product, in order to reduce the cost of product as far as possible, can not use comparatively senior power management chip, and general power management chip do not have the function detecting battery dump energy, so generally need to calculate by software and judge.
In prior art, measuring the general judgment mode of battery dump energy is periodically measure cell voltage by ADC interface (Analog-digital Converter interface), and judges the electricity of battery according to measured value.But there is comparatively big error by the battery dump energy that the method obtains.Such as, owing to judging that the threshold value of normal voltage and low-voltage is fixed, may occur that the voltage of some battery is lower than threshold value, but dump energy is more, now causes result of determination on the low side; Another kind of situation be the voltage of some battery higher than threshold value, but dump energy is less, cannot send low-voltage and report to the police, now cause result of determination higher.And along with the use of lithium battery, battery performance declines to some extent, actual threshold value should along with the time on move.If adopt the method for this fixed gate limit value, along with the use of equipment, the service time after warning is shorter and shorter.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of evaluation method and system of electric quantity of lithium battery, be intended to solve in prior art and obtain the inaccurate defect of battery dump energy value, the evaluation method precision of electric quantity of lithium battery of the present invention is high simultaneously, real-time monitoring, and implementation procedure uncomplicated.
Technical scheme of the present invention is as follows:
An evaluation method for electric quantity of lithium battery, wherein, described method comprises step:
A, in real time detect power consumption module in mobile device and whether start and execute the task, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
B, execute the task according to the described lithium battery obtained before cell voltage, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
C, according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance.
The evaluation method of described electric quantity of lithium battery, wherein, described steps A specifically comprises:
A1, in real time detect power consumption rank in mobile device and whether start in the power consumption module of top n and execute the task; Wherein, N is positive integer;
A2, when detect the high power consumption module in the module of power consumption rank in top n start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described high power consumption module is the power consumption rank module that power consumption ranks the first in the module of top n;
A3, to execute the task when detecting that the high power consumption module in the module of power consumption rank in top n does not start, and detect that the secondary high power consumption module of power consumption rank in the module of top n starts when executing the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described time high power consumption module to refer in N-1 module remaining except described high power consumption module the module of most power consumption.
The evaluation method of described electric quantity of lithium battery, wherein, described steps A specifically comprises:
A11, the module list pre-setting preferential monitoring module and monitoring order, with one preset cycle and according to monitoring order, the module of monitoring successively in described module list whether have one power consumption module start executes the task;
A12, when detecting that the module in described module list has a power consumption module to start and executes the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task.
The evaluation method of described electric quantity of lithium battery, wherein, described step B specifically comprises:
B1, set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
B2, the lithium battery of acquisition is executed the task before cell voltage, cell voltage decline amplitude peak and task terminate the value consuming time that rear cell voltage returns to described given voltage and are indicated in respectively in described rectangular coordinate system in space in process of executing the task, and obtain a current lithium battery voltage characteristic coordinates point.
The evaluation method of described electric quantity of lithium battery, wherein, in described step C when judge described current lithium battery voltage characteristic coordinates point be in multiple battery electric quantity boundary surfaces of demarcating in advance wherein between adjacent two boundary surfaces time, then corresponding according to adjacent two boundary surfaces battery electric quantity value determination lithium battery current residual electricity.
The evaluation method of described electric quantity of lithium battery, wherein, described cell voltage reverse impulse family curve is obtain the cycle with the voltage preset, obtain many group lithium batteries execute the task before cell voltage, in process of executing the task, cell voltage decline amplitude peak and task terminate rear cell voltage and return to the consuming time of described given voltage, and by organize more described lithium battery execute the task before cell voltage, in described process of executing the task, cell voltage decline amplitude peak and described task terminate rear cell voltage and return to the consuming time of described given voltage and be indicated in a rectangular coordinate system in space respectively, the curve obtained after the multiple points be indicated in described rectangular space coordinate are connected with smooth curve.
The evaluation method of described electric quantity of lithium battery, wherein, described given voltage for described in execute the task before cell voltage 95%.
An estimating system for electric quantity of lithium battery, wherein, comprising:
Data acquisition module, whether start execute the task for detecting power consumption module in mobile device in real time, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
Coordinate points demarcating module, for the cell voltage before executing the task according to the described lithium battery obtained, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
Electricity acquisition module, for according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance.
The estimating system of described electric quantity of lithium battery, wherein, described coordinate points demarcating module specifically comprises:
Coordinate axis sets up unit, for set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
Curve acquisition unit, terminate for cell voltage decline amplitude peak and task in the cell voltage before being executed the task by the lithium battery of acquisition, process of executing the task the value consuming time that rear cell voltage returns to described given voltage to be indicated in respectively in described rectangular coordinate system in space, obtain a current lithium battery voltage characteristic coordinates point.
The estimating system of described electric quantity of lithium battery, wherein, in described electricity acquisition module when judge described current lithium battery voltage characteristic coordinates point be in multiple battery electric quantity boundary surfaces of demarcating in advance wherein between adjacent two boundary surfaces time, then corresponding according to adjacent two boundary surfaces battery electric quantity value determination lithium battery current residual electricity.
The evaluation method of a kind of electric quantity of lithium battery provided by the present invention and system, in real-time detection mobile device, whether power consumption module starts and executes the task, when detecting that the startup of at least one power consumption module is executed the task, then obtain lithium battery execute the task before cell voltage, in process of executing the task, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage, and with above-mentioned data for coordinate points, be indicated in a rectangular coordinate system in space and obtained a current lithium battery voltage characteristic coordinates point, afterwards according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity demarcated in advance.The present invention just carries out battery electric quantity estimation when high power consumption module starts and executes the task, and is estimated as the estimation based on voltage response variation tendency, therefore result is more accurate; Estimation process can be realized by software simultaneously, without the need to power management chip, saves equipment cost.
Accompanying drawing explanation
Fig. 1 is that mobile device performs compared with the lithium battery voltage curve after the task of power consumption.
Fig. 2 is the process flow diagram of the evaluation method preferred embodiment of electric quantity of lithium battery of the present invention
Fig. 3 is the structured flowchart of the estimating system preferred embodiment of electric quantity of lithium battery of the present invention.
Embodiment
The invention provides a kind of evaluation method and system of electric quantity of lithium battery, for making object of the present invention, technical scheme and effect 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.
Suppose that lithium battery original state is for the state of working to the last minute, to the real-time measurement of cell voltage in the use procedure of mobile device being provided with lithium battery, and obtain a mobile device execution compared with the lithium battery voltage curve after the task of power consumption according to measurement result, as shown in Figure 1, described lithium battery voltage calibration curve one with time t for x-axis, in the rectangular coordinate system being y-axis with voltage V, wherein, V
0for cell voltage during lithium battery Full Power State, v, v
1, v
2, v
nfor the current battery level that lithium battery records respectively after using different time, V
lowcell voltage (voltage of mobile device work cannot be driven) during state of charge low for lithium battery, can find from many curves Fig. 1: when mobile device execute one compared with the task of power consumption after, cell voltage v will as shown in the I figure of Fig. 1, there is the negative pulse that slight, then cell voltage return to tasks carrying before voltage levvl, the time of pulse is shorter; And along with the use of mobile device, electric quantity of lithium battery declines, after performing same task, the electric quantity curve of battery will be schemed as the II of Fig. 1, the Long-term change trend of III figure, finally develops into the situation of IV figure.
IV figure from figure in 1, can obtain the feature interpretation that battery electric quantity declines along with use: 1. before tasks carrying, cell voltage declines gradually; 2. perform the large task of power consumption, cell voltage declines instantaneously and progressively increases; 3. the time of cell voltage recovery is more and more longer.
Based on the above-mentioned feature of cell voltage, the invention provides a kind of evaluation method of electric quantity of lithium battery.
Refer to Fig. 2, Fig. 2 is the process flow diagram of the preferred embodiment of the evaluation method of electric quantity of lithium battery of the present invention.As shown in Figure 2, the evaluation method of described electric quantity of lithium battery, comprises the following steps:
Step S100, in real time detect power consumption module in mobile device and whether start and execute the task, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
Now implement with two embody rule embodiments, carry out the detailed process of data acquisition in description of step S100;
Embodiment one
101, detect in real time power consumption rank in mobile device whether to start in the power consumption module of top n and execute the task; Wherein, N is positive integer;
Obviously, in mobile device, power consumption rank can obtain through statistics in user's routine use process in the power consumption module of top n.Concrete, the module of most power consumption is high power consumption module, and the module of the second power consumption be secondary high power consumption module, and the module of the 3rd power consumption is the 3rd power consumption module, the like, the module of N power consumption is N power consumption module.
102, when detect the high power consumption module in the module of power consumption rank in top n start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described high power consumption module is the power consumption rank module that power consumption ranks the first in the module of top n;
103, execute the task when detecting that the high power consumption module in the module of power consumption rank in top n does not start, and detect that the secondary high power consumption module of power consumption rank in the module of top n starts when executing the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described time high power consumption module to refer in N-1 module remaining except described high power consumption module the module of most power consumption.
Concrete, in 102 and 103 can one predetermined time cycle T detect high power consumption module and time high power consumption module and whether start and execute the task.Such as, in time 0-T, detect whether high power consumption module starts execute the task, if high power consumption module does not start and executes the task in time 0-T, then in time T-2T, detect time high power consumption module whether start and execute the task; If time high power consumption module does not start and executes the task in time T-2T, in time 2T-3T, then detect the 3rd power consumption module whether start and execute the task, by that analogy, startup whether is had to execute the task until detected power consumption rank in mobile device in the power consumption module of top n.
Embodiment two
111, pre-set the module list of preferential monitoring module and monitoring order thereof, cycle of presetting with one and according to monitoring order, whether the module detected successively in described module list has a power consumption module to start is executed the task;
In 111, pre-set the power consumption module list that user expects to monitor, and determine the monitoring order of each power consumption module in power consumption module list.After completing above-mentioned setting, namely with a cycle of presetting and according to monitoring order, whether the module detected successively in described module list has a power consumption module to start is executed the task.
112, when detecting that the module in described module list has a power consumption module to start and executes the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task.
In the polling type detection mode of 111, when detecting that the module in described module list has a power consumption module to start and executes the task, namely obtaining 3 above-mentioned lithium battery parameters, thus carrying out the estimation of lithium battery dump energy.
In preferred embodiment of the present invention, employing be the technical scheme of carrying out the estimation of battery electric quantity based on executing the task of power consumption module in mobile device, but not adopt the fixed cycle to carry out the scheme of the estimation of battery electric quantity.Adopt the electricity estimation consistance of carrying out the technical scheme of the estimation of battery electric quantity based on executing the task of power consumption module in mobile device better, and estimation result is more accurate.
In the use procedure of mobile device, detect in real time power consumption module in mobile device and whether start and execute the task, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage V
pre, cell voltage decline amplitude peak in process of executing the task
and task terminates the t consuming time that rear cell voltage returns to a given voltage
recovery; Wherein said given voltage executed the task by lithium battery before cell voltage V
predetermine, the span of described given voltage is 0.9V
pre-0.99V
pre, preferably described given voltage value is 0.95V
pre; Wherein, T
1for positive integer, V
pre,
and t
recoveryreal number all for being more than or equal to 0.
Owing to being detect any power consumption module in mobile device in real time whether to start and carry out the estimation of electric quantity of lithium battery in the step s 100, execute the task as long as also namely have a power consumption module to start in mobile device, then obtain lithium battery execute the task before cell voltage V
pre, cell voltage decline amplitude peak in process of executing the task
and task terminates the t consuming time that rear cell voltage returns to a given voltage
recover; Such as, in mobile device, high power consumption module does not start in a long time and executes the task, and in secondary high power consumption module or other power consumption modules, any one starts and executes the task, then obtain V now
pre,
and t
recovery.
Step S200, execute the task according to the described lithium battery obtained before cell voltage, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
Cell voltage V before obtaining lithium battery in the step s 100 and executing the task
pre, cell voltage decline amplitude peak in process of executing the task
and task terminates the t consuming time that rear cell voltage returns to a given voltage
recoveryafter, can respectively with V
pre,
and t
recoveryfor coordinate axis sets up a rectangular coordinate system in space, and (the V will obtained in step S100
pre,
, t
recovery) be indicated in rectangular coordinate system in space.
Step S300, according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance;
Embodiment further, as shown in Figure 2, before step S100 data acquisition, also comprises:
Step S10, in advance demarcation cell voltage reverse impulse family curve, and demarcate multiple battery electric quantity boundary surface according to described cell voltage reverse impulse family curve.
In preferred embodiment of the present invention, before mobile device dispatches from the factory, mobile device business men all can demarcate cell voltage reverse impulse family curve, and demarcates many battery electric quantity boundary surfaces according to described cell voltage reverse impulse family curve.When the battery electric quantity boundary surface quantity of demarcating is more, the estimation result of described lithium battery current residual electricity is more accurate.
Concrete, the process of the battery electric quantity cell voltage reverse impulse family curve and battery electric quantity boundary surface of demarcating power consumption module is:
(1) select one piece of battery, at set intervals, as 1 hour, high power consumption module performs a subtask, measures above-mentioned (V
pre,
, t
recovery), and in the cell voltage before executing the task with lithium battery respectively, process of executing the task cell voltage decline amplitude peak and task terminate after cell voltage return to the consuming time for marking in the rectangular coordinate system in space of coordinate axis of 95% of the cell voltage before executing the task.Along with the growth of time, a curve will be obtained in the coordinate system, represent for the cell voltage reverse impulse family curve of described high power consumption software module from full power state to running down of battery state;
(2) polylith battery is selected to do identical test, family of curves will be obtained in relative coordinate system, and forming an effective operation interval of cell voltage reverse impulse family curve for described high power consumption module, the effective operation interval of described cell voltage reverse impulse family curve adopts the intersection operation of curve to draw.
(3) according to the border of the effective operation interval of upper described cell voltage reverse impulse family curve, obtain the boundary condition of a series of battery low-electricity quantity, these boundary conditions will form the boundary condition of battery electric quantity estimation; In addition effective operation interval is divided the stage, the different brackets of battery electric quantity will be obtained, and the boundary condition of respective battery charge level; The boundary condition of battery low-electricity quantity and the boundary condition of respective battery charge level form the foundation of battery electric quantity estimation.
Why select one with V in present pre-ferred embodiments
pre,
and t
recoveryset up in a rectangular coordinate system in space for coordinate axis and demarcate cell voltage reverse impulse family curve and multiple battery electric quantity boundary surface, because as can be seen from Figure 1, in plane right-angle coordinate, demarcate cell voltage family curve need Real-time Obtaining data, and according to Plotting data curve, often record one group of data and will draw a corresponding with it cell voltage family curve, significantly increase the workload of mobile device data process.If but set up with V
pre,
and t
recoveryfor the rectangular coordinate system in space of coordinate axis, as acquisition one group of (V
pre,
, t
recovery), a coordinate points in the just rectangular coordinate system in space obtained, greatly simplify drawing process.Demarcate the characteristic process of cell voltage reverse impulse, as described in the process of above-mentioned (1)-(2).
Now with an instantiation, battery electric quantity boundary surface calibration process in above-mentioned (3) process is described.After demarcated cell voltage reverse impulse family curve in above-mentioned (1) and (2) process, can find there are some flex points in described cell voltage reverse impulse family curve, now, one can have been arranged at each flex point place and be parallel to
ot
recoverycoordinate surface and through the battery electric quantity boundary surface of this flex point.Such as, there are 10 flex points in described cell voltage reverse impulse family curve, now arrange one respectively according to 10 flex points and be parallel to
ot
recoverycoordinate surface and through the battery electric quantity boundary surface of this flex point, the battery electric quantity corresponding by above-mentioned 10 flex points demarcates battery electric quantity corresponding to 10 battery electric quantity boundary surfaces, such as be demarcated as 10% respectively, 20%, 30%, 40%, 50%, 60%, 70%, 80%, the battery electric quantity boundary surface of 90% and 100%, now in conjunction with described current lithium battery voltage characteristic coordinates point and above-mentioned 10 battery electric quantity boundary surface determination lithium battery current residual electricity, when described current lithium battery voltage characteristic coordinates point is in the zone line of above-mentioned 10 battery electric quantity boundary surfaces wherein between adjacent two battery electric quantity borders, such as current lithium battery voltage characteristic coordinates point is in the boundary surface of battery electric quantity residue 60% and pond electricity when remaining the zone line of the boundary surface of 70%, then can estimate that now lithium battery current residual electricity is 61-69%.Obviously, when the battery electric quantity boundary surface quantity of demarcating is more, the estimation result of described lithium battery current residual electricity is more accurate.
Embodiment further, the detailed process that described step S200 coordinate points is demarcated comprises:
Step S201, set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
Cell voltage V before obtaining lithium battery in the step s 100 and executing the task
pre, cell voltage decline amplitude peak in process of executing the task
and task terminates the t consuming time that rear cell voltage returns to described given voltage
recoveryafter, can respectively with V
pre,
and t
recoveryfor coordinate axis sets up a rectangular coordinate system in space, wherein, V
pre,
and t
recoveryreal number all for being more than or equal to 0.
Step S202, the lithium battery of acquisition is executed the task before cell voltage, cell voltage decline amplitude peak and task terminate the value consuming time that rear cell voltage returns to described given voltage and are indicated in respectively in described rectangular coordinate system in space in process of executing the task, and obtain a current lithium battery voltage characteristic coordinates point.
Embodiment further, in described step S300 when judge described current lithium battery voltage characteristic coordinates point be in multiple battery electric quantity boundary surfaces of demarcating in advance wherein between adjacent two boundary surfaces time, then corresponding according to adjacent two edges circle curve battery electric quantity value determination lithium battery current residual electricity.
Embodiment further, described cell voltage reverse impulse family curve is obtain the cycle with the voltage preset, obtain many group lithium batteries execute the task before cell voltage, in process of executing the task, cell voltage decline amplitude peak and task terminate rear cell voltage and return to the consuming time of described given voltage, and by organize more described lithium battery execute the task before cell voltage, in described process of executing the task, cell voltage decline amplitude peak and described task terminate rear cell voltage and return to the consuming time of described given voltage and be indicated in a rectangular coordinate system in space respectively, the curve obtained after the multiple points be indicated in described rectangular space coordinate are connected with smooth curve.
In preferred embodiment of the present invention, not only need to demarcate the battery electric quantity cell voltage reverse impulse family curve based on power consumption module and battery electric quantity boundary surface in advance, but also needing the power consumption module of demarcating in advance in mobile device, existing explanation with an instantiation demarcates power consumption module calibration process in mobile device.
Concrete, in mobile device, the calibration process of power consumption module is;
(a) design zone bit (flag_high_consume), represent the whether high power consumption module of driving task (true is expressed as high power consumption) of hardware module, and numbered by the ID(of module) and zone bit form the Object array of bottom layer driving module power consumption information, by its called after:
driver_consume_flahs<module_id,flag_high_consume>[]
Above-mentioned array is a two-dimensional array, and elementary cell is (module_id, flag_high_consume), and array is called driver_consume_flahs; In the design process of the design and devdlop layer of system layer, relate to the upper layer module calling high power consumption bottom layer driving module, all need to mark relevant zone bit flag_hig_consume_up, the flag_high_consume of the bottom module that this zone bit is called by module obtains through AND operation;
Similarly, upper layer module also forms the data structure about module power consumption:
driver_consume_flahs_up<module_id,flag_high_consume>[]
Also be two-dimensional array, elementary cell is (module_id, flag_high_consume_up), and array is called driver_consume_flahs_up.
Flag_high_consume in above-mentioned data structure is obtained by bottom module testing.Performing correlation module function by the cycle, with the working current of oscillograph observed object equipment, be that setting basis for estimation judges that the Logic judgment result of flag_high_consume is as very or as vacation according to the grading pedestrian of the power consumption of the module of objectives equipment.
B () when the program is run, when performing certain upper layer module (function or program task), according to driver_consume_flahs_up<module_id, flag_high_consume> [] obtains the flag_hig_consume_up of this module, thus judges whether high power consumption module.
Based on said method, present invention also offers a kind of estimating system of electric quantity of lithium battery, as shown in Figure 2, the estimating system of described electric quantity of lithium battery comprises:
Data acquisition module 100, whether start execute the task for detecting power consumption module in mobile device in real time, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
Coordinate points demarcating module 200, for the cell voltage before executing the task according to the described lithium battery obtained, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
Electricity acquisition module 300, for according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance.
Embodiment further, the estimating system of described electric quantity of lithium battery also comprises:
Demarcating module 10, for demarcating cell voltage reverse impulse family curve in advance, and demarcates many battery electric quantity boundary surfaces according to described cell voltage reverse impulse family curve.
Embodiment further, described coordinate points demarcating module 200 specifically comprises:
Coordinate axis sets up unit, for set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
Curve acquisition unit, terminate for cell voltage decline amplitude peak and task in the cell voltage before being executed the task by the lithium battery of acquisition, process of executing the task the value consuming time that rear cell voltage returns to described given voltage to be indicated in respectively in described rectangular coordinate system in space, obtain a current lithium battery voltage characteristic coordinates point.
In sum, the evaluation method of a kind of electric quantity of lithium battery provided by the present invention and system, whether the high power consumption module in real-time monitoring mobile device starts is executed the task, when detecting described high power consumption module startup and executing the task, then obtain lithium battery execute the task before cell voltage, in process of executing the task, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage, and with above-mentioned data for coordinate points, be indicated in a rectangular coordinate system in space and obtained a current lithium battery voltage characteristic coordinates point, afterwards according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity demarcated in advance.The present invention just carries out battery electric quantity estimation when high power consumption module starts and executes the task, and is estimated as the estimation based on voltage response variation tendency, therefore result is more accurate; Estimation process can be realized by software simultaneously, without the need to power management chip, saves equipment cost.
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 (10)
1. an evaluation method for electric quantity of lithium battery, is characterized in that, described method comprises step:
A, in real time detect power consumption module in mobile device and whether start and execute the task, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
B, execute the task according to the described lithium battery obtained before cell voltage, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
C, according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance.
2. the evaluation method of electric quantity of lithium battery according to claim 1, it is characterized in that, described steps A specifically comprises:
A1, in real time detect power consumption rank in mobile device and whether start in the power consumption module of top n and execute the task; Wherein, N is positive integer;
A2, when detect the high power consumption module in the module of power consumption rank in top n start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described high power consumption module is the power consumption rank module that power consumption ranks the first in the module of top n;
A3, to execute the task when detecting that the high power consumption module in the module of power consumption rank in top n does not start, and detect that the secondary high power consumption module of power consumption rank in the module of top n starts when executing the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task; Wherein, described time high power consumption module to refer in N-1 module remaining except described high power consumption module the module of most power consumption.
3. the evaluation method of electric quantity of lithium battery according to claim 1, it is characterized in that, described steps A specifically comprises:
A11, the module list pre-setting preferential monitoring module and monitoring order, with one preset cycle and according to monitoring order, the module of monitoring successively in described module list whether have one power consumption module start executes the task;
A12, when detecting that the module in described module list has a power consumption module to start and executes the task, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of described given voltage in process of executing the task.
4. the evaluation method of electric quantity of lithium battery according to claim 1, it is characterized in that, described step B specifically comprises:
B1, set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
B2, the lithium battery of acquisition is executed the task before cell voltage, cell voltage decline amplitude peak and task terminate the value consuming time that rear cell voltage returns to described given voltage and are indicated in respectively in described rectangular coordinate system in space in process of executing the task, and obtain a current lithium battery voltage characteristic coordinates point.
5. the evaluation method of electric quantity of lithium battery according to claim 1, it is characterized in that, in described step C when judge described current lithium battery voltage characteristic coordinates point be in multiple battery electric quantity boundary surfaces of demarcating in advance wherein between adjacent two boundary surfaces time, then corresponding according to adjacent two boundary surfaces battery electric quantity value determination lithium battery current residual electricity.
6. the evaluation method of electric quantity of lithium battery according to claim 1, it is characterized in that, described cell voltage reverse impulse family curve is obtain the cycle with the voltage preset, obtain many group lithium batteries execute the task before cell voltage, in process of executing the task, cell voltage decline amplitude peak and task terminate rear cell voltage and return to the consuming time of described given voltage, and by organize more described lithium battery execute the task before cell voltage, in described process of executing the task, cell voltage decline amplitude peak and described task terminate rear cell voltage and return to the consuming time of described given voltage and be indicated in a rectangular coordinate system in space respectively, the curve obtained after the multiple points be indicated in described rectangular space coordinate are connected with smooth curve.
7. the evaluation method of electric quantity of lithium battery according to any one of claim 1-6, is characterized in that, described given voltage for described in execute the task before cell voltage 95%.
8. an estimating system for electric quantity of lithium battery, is characterized in that, comprising:
Data acquisition module, whether start execute the task for detecting power consumption module in mobile device in real time, when detect at least one power consumption module start execute the task time, then obtain lithium battery execute the task before cell voltage, cell voltage decline maximum amplitude value and task terminate rear cell voltage and return to the consuming time of a given voltage in process of executing the task;
Coordinate points demarcating module, for the cell voltage before executing the task according to the described lithium battery obtained, described in execute the task cell voltage decline amplitude peak and described task in process terminate rear cell voltage and return to the consuming time of described given voltage, demarcate one and be in current lithium battery voltage characteristic coordinates point in rectangular coordinate system in space;
Electricity acquisition module, for according to described current lithium battery voltage characteristic coordinates point and the multiple battery electric quantity boundary surface determination lithium battery current residual electricity to demarcate in advance.
9. the estimating system of electric quantity of lithium battery according to claim 8, it is characterized in that, described coordinate points demarcating module specifically comprises:
Coordinate axis sets up unit, for set up one execute the task with lithium battery respectively before cell voltage, cell voltage decline amplitude peak and task terminate the rectangular coordinate system in space for coordinate axis consuming time that rear cell voltage returns to described given voltage in process of executing the task;
Curve acquisition unit, terminate for cell voltage decline amplitude peak and task in the cell voltage before being executed the task by the lithium battery of acquisition, process of executing the task the value consuming time that rear cell voltage returns to described given voltage to be indicated in respectively in described rectangular coordinate system in space, obtain a current lithium battery voltage characteristic coordinates point.
10. the estimating system of electric quantity of lithium battery according to claim 8, it is characterized in that, in described electricity acquisition module when judge described current lithium battery voltage characteristic coordinates point be in multiple battery electric quantity boundary surfaces of demarcating in advance wherein between adjacent two boundary surfaces time, then corresponding according to adjacent two boundary surfaces battery electric quantity value determination lithium battery current residual electricity.
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