CN102195304B - Method and device for managing service time of cell and portable computer - Google Patents
Method and device for managing service time of cell and portable computer Download PDFInfo
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Abstract
The invention provides a method and a device for managing the service time of a cell, and a portable computer, wherein the method comprises the steps of: acquiring an upper limit threshold and a lower limit threshold of a discharging current of the cell; acquiring residual capacity of the cell; according to the residual capacity and the upper limit threshold and the lower limit threshold of the discharging current, calculating a service time range the residual capacity can provide; and resetting the value of the discharging current according to the service time selected by a user, wherein the service time is within the service time range. According to the technical proposal provided, the service power of the cell is self-controlled under a cell mode according to the residual capacity in the cell, so that the portable computer can operate for a reasonable period of time set by users.
Description
Technical field
The present invention relates to battery technology, refer to especially a kind of method, device and portable computer of managing service time of battery.
Background technology
Portable computer is widely used, and particularly, under the various application scenarioss of movable type office, people have be unable to do without the participation of portable computer.
But due to the restriction of battery technology, in the scene that there is no fixed power source, the operating time of portable computer is limited by very large, for example in the wild, the operating time that battery can provide is conventionally at 2～3 hours; Make portable computer become a chicken ribs.
Inventor is realizing in process of the present invention, find that in prior art, at least there are the following problems: portable computer is under battery mode, the output power of the uncontrollable battery of user, can only use passively remaining battery power, cause the portable computer cannot be in running order within the sufficiently long time.
Summary of the invention
The object of this invention is to provide a kind of method, device and portable computer of managing service time of battery, user can utilize the dump energy of battery to realize portable computer can be in running order within the time of the reasonable length of user's setting.
A method of managing service time of battery, comprising: the upper limit threshold of discharging current and the lower threshold of described discharging current that obtain battery; And obtain the dump energy of battery; According to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculate interval range service time that described dump energy can provide; According to from user selected service time, reset the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
In described method, described in interval range service time that calculates described dump energy and can provide specifically comprise: interval range upper limit Tmax=CRM/ service time (Imin*V) interval range service time lower limit Tmin=CRM/ (Imax*V); Wherein, the dump energy that CRM is battery, physical unit is watt-hour; I is discharging current, and Imin represents the lower threshold of described discharging current, and Imax represents the upper limit threshold of described discharging current; V is cell voltage.
In described method, described in reset the numerical value of described discharging current, specifically comprise: be average discharge current by the setting value of described discharging current; In one-period, obtain real-time discharging current and described real-time discharging current and described average discharge current are compared, when described real-time discharging current is greater than described average discharge current, by regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, diminish with the discharging current of controlling battery; When described real-time discharging current is less than or equal to described average discharge current, do not regulate.
In described method, the service time that described user is selected, specifically determine in the following manner: set up chart, the vertical pivot of described chart represents the dump energy that battery provides, and the transverse axis of described chart represents interval range service time that dump energy can provide; Interval service time that user selects on transverse axis, should be between described service time the interval range upper limit and described service time interval range lower limit.
A device of managing service time of battery, comprising: current threshold acquiring unit, for obtaining dump energy, the upper limit threshold of discharging current and the lower threshold of discharging current of battery; Service time, computing unit, for according to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculated interval range service time that can provide of the dump energy of battery; Electric discharge setup unit, for according to from user selected service time, resets the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
Described device also comprises: current threshold evaluation unit, and for working as portable computer under open mode, by the minimum load of described portable computer and upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
Described device also comprises: regulon, and for regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, to control the numerical value of described discharging current; Cycle detection unit, for the real-time discharging current and the average discharge current that detect being compared in one-period, when described real-time discharging current is greater than described average discharge current, notifies described regulon; Wherein, the described discharging current after setting is described average discharge current.
In described device, also comprise user interaction unit, for receiving user's input message, and obtain according to described input message the described service time that user selectes.
A kind of portable computer, comprising: battery, for storage of electrical energy, and provides discharging current for portable computer; Register, for depositing the upper limit threshold of discharging current and the lower threshold of described discharging current of battery; System Management Bus, is connected with battery, register; Battery management platform, is connected with described System Management Bus, for obtaining upper limit threshold and the lower threshold of discharging current of described battery, the dump energy of the electric energy of battery storage; And according to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculate interval range service time that can provide of the dump energy of battery; According to from user selected service time, reset the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
In described portable computer, also comprise: regulon, for regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, to control the discharging current of battery.
The technical scheme that provides of application, under battery mode, user can be according to the dump energy of storing in battery, and the output power of ACTIVE CONTROL battery makes in time of the reasonable length that portable computer can set user in running order.
Brief description of the drawings
Fig. 1 is the method flow schematic diagram of embodiment of the present invention management service time of battery;
Fig. 2 is the embedded controller structural representation of embodiment of the present invention management battery;
Fig. 3 is embodiment of the present invention embedded controller and other equipment connection schematic diagrames;
Fig. 4 is embodiment of the present invention battery structure circuit diagram;
Fig. 5 is embodiment of the present invention discharge curve schematic diagram;
Fig. 6 is the apparatus structure schematic diagram of embodiment of the present invention management service time of battery.
Embodiment
For making object of the present invention, technical characterictic and implementation result clearer, below in conjunction with the accompanying drawings and the specific embodiments technical scheme of the present invention is described in detail.In embodiment provided by the invention, user can select the residue service time of battery as required within the scope of certain hour, dynamically controls the output power of battery.
Manage a method for service time of battery, as shown in Figure 1, comprising:
The technical scheme that provides of application, under battery mode, user can be according to the dump energy of storing in battery, and the output power of ACTIVE CONTROL battery makes in time of the reasonable length that portable computer can set user in running order.
In its step 101, portable computer, under computer open mode (S0), by the upper limit threshold of the minimum load preestimating battery discharging current of system, is estimated the lower threshold of discharging current by the maximum load of system.Wherein, the upper limit threshold of discharging current and lower threshold are to precompute according to the hardware of computer; For example, the hardware configuration of the portable computer of certain specific model is certain, so in conjunction with power save scheme, can test in advance upper limit threshold Imax and the lower threshold Imin of the discharging current that obtains it, and is kept at register the inside as important parameter.
The state relevant to state S0 also comprises: S3, and pending to RAM; S4/S5, pending to disk/soft closing.
In step 103, the corresponding upper and lower bound that calculates interval range service time, formula is:
Interval range upper limit Tmax=CRM/ service time (Imin*V) (1)
Interval range lower limit Tmin=CRM/ service time (Imax*V) (2)
Wherein, the dump energy that CRM is battery, physical unit is watt-hour (Wh), and I is discharging current, and physical unit is ampere, and V is cell voltage, physical unit is volt; These parameters all can be passed through System Management Bus (SMBus) and from the register (BMU, BATTERYMONITORING UNIT) of battery, read in real time, and conventionally, the cycle of battery reading information is 250 milliseconds.And design capacity, temperature conditions or the discharge time of battery can be considered in formula (1) and (2).
For example, the CRM=25.11Wh of certain moment battery, voltage V=12.47V, afterwards, determines lower threshold Imin and the upper limit threshold Imax of discharging current, calculate respectively service time interval range upper limit Tmax and service time interval range lower limit Tmin.If upper limit threshold Imax=1.81A, interval range lower limit Tmin=25.11/ service time (1.81*12.47)=1.1125Hr; If lower threshold Imin=1A, interval range upper limit Tmax=25.11/ service time (1*12.47)=2.0136Hr.
In step 102, obtain the running parameters such as the battery dump energy of recording in battery gas gauge (GAS Gauge) chip, and temperature by System Management Bus.
In step 104, according to from selected Tdes service time of user, reset the numerical value of described discharging current, wherein, Tdes is that user wishes the time value reaching.As a dynamic real-time process, specifically comprise: after user selected service time of Tdes, calculate average discharge current Imid according to dump energy CRM and Tdes, this is a theoretical numerical value, resetting described discharging current is described average discharge current Imid, and detects in real time the actual numerical value Ireal of discharging current.
Ireal and Imid are compared, if Ireal is greater than Imid, carry out adjustment operation, specifically comprise: by regulate cpu frequency, LCD backlight illumination and/or close external hardware and opening/closing not use hardware, to control the output power of battery; Wherein, external hardware can be USB device, ethernet control chip etc.Otherwise Ireal is less than or equal to Imid, do not need to carry out adjustment operation.
Further optimize such scheme, while detecting discharging current in real time, periodically gather discharging current, for example, taking 5 seconds as a regulating cycle, in a regulating cycle, gather 5s/250ms=20 time, be greater than Imid if exceed the Ireal collecting for 10 times, think that the Ireal of current period is greater than Imid,, in next regulating cycle, carry out adjustment operation.Otherwise, think that Ireal is less than or equal to Imid.
After step 104, also comprise: step 105, the discharge scenario of battery is done to compensation monitoring, the dynamically electricity consumption situation of adjustment System.In compensation monitoring, not only need to detect in real time the discharging current Ireal of battery, and the dump energy CRM of detection battery, and according to current CRM, calculate in real time and estimate Td service time, because user is needing Td to be more than or equal to Tdes under situation conventionally, therefore, be less than the situation of Tdes if there is Td, need by regulating cpu frequency, LCD backlight illumination and/or close external hardware and opening/closing not use hardware, to reduce the output power of battery.In compensation observation process subsequently, until Td while being greater than user's setting-up time Tdes, stops regulating.
Owing to may running into various situations in actual use procedure, this can cause the time used of portable computer to be less than user's setting-up time Tdes, application compensation monitoring technology, according to current discharging current Ireal and dump energy CRM, calculate in real time Td, and in the time that Td is less than Tdes, by regulating the power consumption of portable computer to ensure user's experience.
Comprise:
In Fig. 5, vertical pivot represents the dump energy (mAh) that battery provides, transverse axis represents scope service time that dump energy can provide, can find out according to formula (1) and (2), the physical significance of straight slope is I*V=CRM/T, wherein, V is constant, therefore straight slope has directly characterized the size of I, wherein, in figure, represent respectively upper limit threshold and the lower threshold of discharging current as the slope of two solid lines of straight line, respectively minimum working load and the maximum working load of correspondence system; Article two, the intersection point of straight line and transverse axis formed service time the interval range upper limit and service time interval range lower limit.Under this situation interval, if customer selecting 2 hours, as remaining time, shows to locate in 120 of transverse axis minute, even the somewhere after 120 minutes of transverse axis is selected.Dotted line in figure is the curve that the discharging current Ireal of detection in real time forms, for the preferred discharging current numerical value of one, but and not exclusive technical scheme, this be because, on the right side of this dotted line, in the scope of delimiting at solid line, still can make the technical scheme that other different dotted lines are corresponding.
In the process of practical application, taking the portable computer of the business types such as ThinkPad as example, the electric weight that its battery carries, under normal conditions, can support computer high-load work 3 hours, when in special occasions, for example, in travelling way time, user wishes that the operating time of computer can extend.In the time that the dump energy of battery is Full Charge Capacity; Tmin=3 hour; Imax is the normal work current strength of 3 hours; and rule of thumb or by the minimum working current of each default device; can calculate Imin=3/5Imax; because operating voltage keeps constant (this is also the needs of protection calculation machine internal components) conventionally, therefore can calculate upper limit threshold Tmax=5 hour.The Tdes=4 hour service time that user sets, obviously can calculate Imid=3/4Imax, and reset the numerical value of described discharging current.While detecting discharging current in real time, periodically gather discharging current, for example, taking 5 seconds as a regulating cycle, in a regulating cycle, gather 5s/250ms=20 time, be greater than Imid if exceed the Ireal collecting for 10 times, think that the Ireal of current period is greater than Imid, that is, occurred that Td is less than the situation of Tdes,, in next regulating cycle, carry out adjustment operation.Otherwise, thinking that Ireal is less than or equal to Imid, needn't regulate.
Corresponding, the present invention also provides a kind of device of managing service time of battery, as shown in Figure 6, comprising:
Current threshold acquiring unit 2011, for obtaining the dump energy of battery, upper limit threshold and the lower threshold of discharging current;
Service time, computing unit 2012, for according to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculated interval range service time that can provide of the dump energy of battery;
Electric discharge setup unit 2013, for according to from user selected service time, resets the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
The technical scheme that provides of application, under battery mode, according to the dump energy of storing in battery, controls the output power of battery voluntarily, makes in time of the reasonable length that portable computer can set user in running order.
Wherein, service time computing unit 2012 bases computing formula be:
Interval range upper limit Tmax=CRM/ service time (Imin*V) (1)
Interval range lower limit Tmin=CRM/ service time (Imax*V) (2)
The device design of management service time of battery can be realized in a chip, this chip is called battery management platform 201, and with charge controller 202, battery monitor 203, and register 204 connects.As shown in Figure 2, be the structure of a kind of specific embodiment wherein; Comprise:
Register 204, for depositing upper limit threshold and the lower threshold of discharging current of battery;
Battery monitor 203 (GAS Gauge chip), for monitoring the running parameter such as discharging current and dump energy, is inside preset with upper limit threshold and the lower threshold of battery discharge current corresponding to system minimum load and maximum load.
Except this, charge controller 202, and battery monitor 203 also can be embedded in battery 205, is called the parts of battery 205 inside.Or battery 205 should provide corresponding running parameter for battery management platform 201, and these running parameters can be used to obtain upper limit threshold and the lower threshold of discharging current, the dump energy of battery.Its concrete running parameter providing should not be limited.
As shown in Figure 3, battery management platform 201 and CPU206, LCD207, USB peripheral hardware 208, image controller 209, local area network (LAN) (LAN, Local Area Network) 201 and user interface (UI, UserInterface) 211 connect, wherein:
User can pass through the UI interface setup and use time, and this service time is within described service time interval range.Correspondingly, power management need to be according to this service time resetting, the use electric loading of adjustment System, as it is backlight to close lcd screen, CPU frequency reducing etc.
Embedded controller 200 can directly be controlled LCD backlight illumination; Network chip also can be closed the object that reaches power saving by operating system in there is no use; CPU frequency reducing and video card frequency reducing have corresponding existing scheme to realize; USB5V voltage can be closed by circuit control.
State in realization in the process of technical scheme, adopt program code to realize, and code is left in battery management platform 201.
In device, also comprise:
Current threshold evaluation unit, for working as portable computer under open mode, by the minimum load of described portable computer and rational upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
Regulon, for regulating cpu frequency, LCD backlight illumination, and close/open external equipment, to control the output power of battery.
User interaction unit (UI), for receiving user's input message, and obtains according to described input message the described service time that user selectes.Particularly, can be to provide a chart, vertical pivot represents the dump energy (mAh) that battery provides, transverse axis represents scope service time that dump energy can provide, can find out according to formula (1) and (2), the physical significance of straight slope is I*V=CRM/T, wherein, V is constant, therefore straight slope has directly characterized the size of I, wherein, in figure, represent respectively upper limit threshold and the lower threshold of discharging current as the slope of two solid lines of straight line, article two, the intersection point of straight line and transverse axis formed service time the interval range upper limit and service time interval range lower limit.Interval service time that user selects on transverse axis, should be between the upper limit and lower limit of interval range service time.
Or, numeral is provided, for example, using 0.5 hour minimum particle size as service time, the numeral of demonstration was 3 hours, 3.5 hours, 4 hours, 4.5 hours, and 5 hours.And the selection of waiting for user is as input message, obtains according to described input message the described service time that user selectes.
As shown in Figure 4, be the schematic diagram of battery structure circuit, describe the electrical connection of battery 205 with embedded controller 200 and user interface 211, and described the circuit structure of the inside of embedded controller 200.Wherein the inside of embedded controller 200 comprises:
Concrete adjustment scheme is selected at user interface 211 places, by battery management platform 201 according to user's selection, calculate corresponding adjustment instruction, and send to CPU, LCD, and other device hardware, to regulate cpu frequency, LCD backlight illumination and closing not at the hardware using, controls the output power of battery.
Corresponding, the invention provides a kind of portable computer, comprising: battery 205, is used to portable computer that discharging current is provided; Also further comprise:
And according to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculate interval range service time that can provide of the dump energy of battery; Wherein, within being positioned at described service time of interval range described service time;
According to from user selected service time, reset the numerical value of described discharging current.
In computer, can also comprise:
Regulon, for regulating cpu frequency, LCD backlight illumination, and close/open external equipment, to control the output power of battery.
Embodiments of the invention have following beneficial effect, on the basis of the original performance possessing of battery, according to the upper limit threshold of the dump energy of battery and discharging current and lower threshold, calculate interval range service time that dump energy can provide, select in this interval range for user; And a specific time value of selecting according to user, calculating and coherent system operating load, this comprises: regulate cpu frequency, LCD backlight illumination and close not the hardware in use, meets the battery object time to control the output power of battery, to reach.User is no longer the dump energy that uses passively battery, uses dump energy but dynamically control, particularly for the portable computer of field work, particularly practical.
It should be noted that above embodiment is only unrestricted in order to technical scheme of the present invention to be described, all parameter values can be according to actual conditions adjustment, and within the scope of this rights protection.Those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not depart from the spiritual scope of technical solution of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.
Claims (9)
1. a method of managing service time of battery, is characterized in that, comprising:
Obtain the upper limit threshold of discharging current and the lower threshold of described discharging current of battery, wherein, by the upper limit threshold of the minimum load preestimating battery discharging current of system, estimated the lower threshold of discharging current by the maximum load of system; And obtain the dump energy of battery;
According to the upper limit threshold of described dump energy and described discharging current and lower threshold, calculate interval range service time that described dump energy can provide: interval range upper limit Tmax=CRM/ service time (Imin*V), interval range lower limit Tmin=CRM/ service time (Imax*V), wherein, CRM is the dump energy of battery, physical unit is watt-hour, I is discharging current, Imin represents the lower threshold of described discharging current, Imax represents the upper limit threshold of described discharging current, and V is cell voltage;
According to from user selected service time, reset the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
2. method according to claim 1, is characterized in that, described in reset the numerical value of described discharging current, specifically comprise:
Be average discharge current by the setting value of described discharging current;
In one-period, obtain real-time discharging current and described real-time discharging current and described average discharge current are compared, when described real-time discharging current is greater than described average discharge current, by regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, diminish with the discharging current of controlling battery; When described real-time discharging current is less than or equal to described average discharge current, do not regulate.
3. method according to claim 1, is characterized in that, the service time that described user is selected, specifically determines in the following manner:
Set up chart, the vertical pivot of described chart represents the dump energy that battery provides, and the transverse axis of described chart represents interval range service time that dump energy can provide;
Interval service time that user selects on transverse axis, should be between described service time the interval range upper limit and described service time interval range lower limit.
4. a device of managing service time of battery, is characterized in that, comprising:
Current threshold acquiring unit, for obtaining dump energy, the upper limit threshold of discharging current and the lower threshold of discharging current of battery, wherein, by the upper limit threshold of the minimum load preestimating battery discharging current of system, estimated the lower threshold of discharging current by the maximum load of system;
Service time computing unit, be used for according to the upper limit threshold of described dump energy and described discharging current and lower threshold, interval range service time that can provide of the dump energy of battery: interval range upper limit Tmax=CRM/ service time (Imin*V) is provided, interval range lower limit Tmin=CRM/ service time (Imax*V), wherein, CRM is the dump energy of battery, physical unit is watt-hour, I is discharging current, Imin represents the lower threshold of described discharging current, Imax represents the upper limit threshold of described discharging current, and V is cell voltage;
Electric discharge setup unit, for according to from user selected service time, resets the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
5. device according to claim 4, is characterized in that, also comprises:
Current threshold evaluation unit, for working as portable computer under open mode, by the minimum load of described portable computer and upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
6. device according to claim 4, is characterized in that, also comprises:
Regulon, for regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, to control the numerical value of described discharging current;
Cycle detection unit, for the real-time discharging current and the average discharge current that detect being compared in one-period, when described real-time discharging current is greater than described average discharge current, notifies described regulon; Wherein, the described discharging current after setting is described average discharge current.
7. device according to claim 4, is characterized in that,
User interaction unit, for receiving user's input message, and obtains according to described input message the described service time that user selectes.
8. a portable computer, is characterized in that, comprising:
Battery, for storage of electrical energy, and provides discharging current for portable computer;
Register, for depositing the upper limit threshold of discharging current and the lower threshold of described discharging current of battery, wherein, by the upper limit threshold of the minimum load preestimating battery discharging current of system, is estimated the lower threshold of discharging current by the maximum load of system;
System Management Bus, is connected with battery, register;
Battery management platform, is connected with described System Management Bus, for obtaining upper limit threshold and the lower threshold of discharging current of described battery, the dump energy of the electric energy of battery storage;
And according to the upper limit threshold of described dump energy and described discharging current and lower threshold, interval range service time that can provide of the dump energy of battery: interval range upper limit Tmax=CRM/ service time (Imin*V) is provided, interval range lower limit Tmin=CRM/ service time (Imax*V), wherein, CRM is the dump energy of battery, physical unit is watt-hour, I is discharging current, Imin represents the lower threshold of described discharging current, Imax represents the upper limit threshold of described discharging current, and V is cell voltage;
According to from user selected service time, reset the numerical value of described discharging current; Wherein, within being positioned at described service time of interval range described service time.
9. portable computer according to claim 8, is characterized in that, also comprises:
Regulon, for regulating cpu frequency, LCD backlight illumination and/or close/open external equipment, to control the discharging current of battery.
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| CN101296439A (en) * | 2007-04-25 | 2008-10-29 | 中兴通讯股份有限公司 | System and method for displaying residual power-on time of mobile phone battery and saving power |
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| CN102195304A (en) | 2011-09-21 |
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