CN102195304A - 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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- CN102195304A CN102195304A CN2010101247554A CN201010124755A CN102195304A CN 102195304 A CN102195304 A CN 102195304A CN 2010101247554 A CN2010101247554 A CN 2010101247554A CN 201010124755 A CN201010124755 A CN 201010124755A CN 102195304 A CN102195304 A CN 102195304A
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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, be meant a kind of battery method of service time, device and portable computer managed especially.
Background technology
Portable computer has obtained using widely, and particularly under the various application scenarioss of movable type office, people have be unable to do without the participation of portable computer.
But because the restriction of battery technology, in not having the scene of fixed power source, the operating time of portable computer has been subjected to very big restriction, and for example in the open air, the operating time that battery can provide is usually at 2～3 hours; Make portable computer become a chicken ribs.
The inventor is in realizing process of the present invention, find that there are the following problems at least in the prior art: portable computer is under battery mode, the output power of the uncontrollable battery of user, can only use remaining battery power passively, cause the portable computer can't be in running order in the sufficiently long time.
Summary of the invention
The purpose of this invention is to provide a kind of battery method of service time, device and portable computer managed, the user can utilize the dump energy of battery to realize that portable computer can be in running order in the time of the reasonable length that the user sets.
A kind of battery method of service time of managing comprises: obtain the upper limit threshold of discharging current of battery and the lower threshold of described discharging current; And the dump energy that obtains battery; According to the upper limit threshold and the lower threshold of described dump energy and described discharging current, calculate described dump energy interval range service time that can provide; According to the service time of selecting from the user, reset the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
In the described method, described calculate described dump energy interval range service time that 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, CRM is the dump energy of battery, and physical unit is a watt-hour; I is a discharging current, and then Imin represents the lower threshold of described discharging current, and Imax represents the upper limit threshold of described discharging current; V is a cell voltage.
In the described method, the described numerical value that resets described discharging current specifically comprises: with the setting value of described discharging current is average discharge current; Obtaining real-time discharging current in one-period also compares described real-time discharging current and described average discharge current, described real-time discharging current is during greater than described average discharge current, by regulating cpu frequency, LCD backlight illumination and/or close external equipment diminish with the discharging current of controlling battery; Described real-time discharging current is not regulated during smaller or equal to described average discharge current.
In the described method, the service time that described user selectes, specifically determine in the following manner: set up chart, the vertical pivot of described chart is represented the dump energy that battery provides, the transverse axis of described chart represent dump energy interval range service time that can provide; Interval service time selected on transverse axis of user then should be between described service time the interval range upper limit and described service time interval range lower limit.
A kind of battery device of service time of managing comprises: the current threshold acquiring unit is used to obtain the dump energy of battery, the upper limit threshold of discharging current and the lower threshold of discharging current; Service time, computing unit was used for upper limit threshold and lower threshold according to described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide; The discharge setup unit is used for basis from the service time that the user selectes, and resets the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
Described device also comprises: the current threshold evaluation unit is used for working as portable computer under open mode, by the minimum load of described portable computer and the upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
Described device also comprises: regulon, be used to regulate cpu frequency, and LCD backlight illumination and/or close external equipment are to control the numerical value of described discharging current; Cycle detection unit is used in one-period detected real-time discharging current and average discharge current being compared, and described real-time discharging current is notified described regulon during greater than described average discharge current; Wherein, the described discharging current after the setting is described average discharge current.
In the described device, also comprise user interaction unit, be used to receive user's input information, and obtain the described service time that the user selectes according to described input information.
A kind of portable computer comprises: battery is used for storage of electrical energy, and provides discharging current for portable computer; Register is used to deposit the upper limit threshold of discharging current of battery and the lower threshold of described discharging current; System Management Bus is connected with battery, register; The battery management platform is connected with described System Management Bus, is used to obtain the upper limit threshold and the lower threshold of the discharging current of described battery, the dump energy of the electric energy of battery storage; And according to the upper limit threshold and the lower threshold of described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide; According to the service time of selecting from the user, reset the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
In the described portable computer, also comprise: regulon, be used to regulate cpu frequency, LCD backlight illumination and/or close external equipment are with the discharging current of control battery.
The technical scheme that is provided is provided, and under battery mode, the user can be according to the dump energy of storing in the battery, and the output power of ACTIVE CONTROL battery makes that portable computer can be in running order in the time of the reasonable length that the user sets.
Description of drawings
Fig. 1 is the embodiment of the invention management battery method flow schematic diagram of service time;
Fig. 2 is the embedded controller structural representation of embodiment of the invention management battery;
Fig. 3 is embodiment of the invention embedded controller and other equipment connection diagrams;
Fig. 4 is an embodiment of the invention battery structure circuit diagram;
Fig. 5 is an embodiment of the invention discharge curve schematic diagram;
Fig. 6 is the embodiment of the invention management battery apparatus structure schematic diagram of service time.
Embodiment
For making purpose 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.Among the embodiment provided by the invention, the user can select the residue service time of battery as required in the certain hour scope, dynamically controls the output power of battery.
A kind of battery method of service time of managing as shown in Figure 1, comprising:
The technical scheme that is provided is provided, and under battery mode, the user can be according to the dump energy of storing in the battery, and the output power of ACTIVE CONTROL battery makes that portable computer can be in running order in the time of the reasonable length that the user sets.
In its step 101, portable computer 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 under computer open mode (S0).Wherein, the upper limit threshold of discharging current and lower threshold are that hardware according to computer precomputes; For example, the hardware configuration of the portable computer of certain specific model is certain, so in conjunction with power save scheme, can test the upper limit threshold Imax and the lower threshold Imin of the discharging current that obtains it in advance, and is kept at the register the inside as important parameter.
The state relevant with 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, CRM is the dump energy of battery, and physical unit is watt-hour (Wh), and I is a discharging current, and physical unit is an ampere, and V is a cell voltage, and physical unit is a volt; These parameters all can be passed through System Management Bus (SMBus) and read from the register (BMU, BATTERYMONITORING UNIT) of battery in real time, and usually, the cycle that battery reads 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, certain is the CRM=25.11Wh of battery constantly, and voltage V=12.47V afterwards, determines the 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, then interval range lower limit Tmin=25.11/ service time (1.81*12.47)=1.1125Hr; If lower threshold Imin=1A, then interval range upper limit Tmax=25.11/ service time (1*12.47)=2.0136Hr.
In the step 102, obtain the battery dump energy of putting down in writing in battery gas gauge (GAS Gauge) chip by System Management Bus, and running parameter such as temperature.
In the step 104, according to Tdes service time that selectes from the user, reset the numerical value of described discharging current, wherein, Tdes is that the user wishes a 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 the actual numerical value Ireal of discharging current in real time.
Ireal and Imid are compared,, specifically comprise if Ireal greater than Imid, then carry out to regulate operation: by regulating cpu frequency, the LCD backlight illumination and/or close external hardware and opening/closing not at the hardware that uses, with the output power of control battery; Wherein, external hardware can be a USB device, ethernet control chip etc.Otherwise Ireal then need not carry out and regulate operation smaller or equal to Imid.
Further optimize such scheme, when detecting discharging current in real time, periodically gather discharging current, for example, to be a regulating cycle 5 seconds, gather 5s/250ms=20 time in the regulating cycle, if surpass the Ireal that collects for 10 times greater than Imid, then think the Ireal of current period greater than Imid, then in next regulating cycle, carry out and regulate operation.Otherwise, think that then Ireal is smaller or equal to Imid.
After the step 104, also comprise: step 105, the discharge scenario of battery is done compensation monitoring, dynamically the electricity consumption situation of Adjustment System.In the 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, calculate in real time and estimate Td service time according to current CRM, because the user is needing Td more than or equal to Tdes under the situation usually, therefore, if Td less than the situation of Tdes, needs to pass through to regulate cpu frequency, the LCD backlight illumination and/or close external hardware and opening/closing not at the hardware that uses, to reduce the output power of battery.In compensation observation process subsequently, during greater than user's setting-up time Tdes, stop to regulate until Td.
Owing to may run into various situations in the actual use, this time used that can cause portable computer is less than user's setting-up time Tdes, use the compensation monitoring technology, according to current discharging current Ireal and dump energy CRM, calculate Td in real time, and during less than Tdes, guarantee user's experience by the power consumption of regulating portable computer at Td.
Comprise:
Among Fig. 5, vertical pivot is represented the dump energy (mAh) that battery provides, transverse axis represent dump energy scope service time that can provide, according to formula (1) and (2) as can be seen, the physical significance of straight slope is I*V=CRM/T, wherein, V is a constant, so straight slope directly characterized the size of I, wherein, upper limit threshold and the lower threshold of representing discharging current among the figure as the slope of two solid lines of straight line respectively, the minimum working load and the maximum working load of corresponding system respectively; Article two, the intersection point of straight line and transverse axis formed service time the interval range upper limit and service time the interval range lower limit.Under this situation interval, if customer selecting 2 hours as remaining time, shows then and need locate 120 minutes of transverse axis that even the somewhere after 120 minutes of transverse axis is selected.Dotted line among the figure is the formed curve of discharging current Ireal that detects in real time, be a kind of preferred discharging current numerical value, but and not exclusive technical scheme, this be because, right side at this dotted line, in the scope that solid line delimited, still can make the technical scheme of other different dotted line correspondences.
In the process of practical application, be example with the portable computer of commercial types such as ThinkPad, the electric weight that its battery carries, can support computer high-load work 3 hours under the normal conditions, when being in special occasions, in the time of for example in the travelling way, the user wishes that the operating time of computer can prolong.When the dump energy of battery is Full Charge Capacity; Tmin=3 hour; then Imax is 3 hours a current strength of operate as normal; and rule of thumb or the minimum working current by each default device; can calculate Imin=3/5Imax; because operating voltage keeps usually constant (this also is the needs of protection computer-internal device), therefore can calculate upper limit threshold Tmax=5 hour.The Tdes=4 hour service time that the user sets, then obviously can calculate Imid=3/4Imax, and reset the numerical value of described discharging current.When detecting discharging current in real time, periodically gather discharging current, for example, to be a regulating cycle 5 seconds, gather 5s/250ms=20 time in the regulating cycle, if surpass the Ireal that collects for 10 times greater than Imid, think that then the Ireal of current period greater than Imid, that is, the situation of Td less than Tdes occurred, then in next regulating cycle, carry out and regulate operation.Otherwise, think that then Ireal smaller or equal to Imid, needn't regulate.
Corresponding, the present invention also provides a kind of battery device of service time of managing, and as shown in Figure 6, comprising:
Current threshold acquiring unit 2011 is used to obtain the dump energy of battery, the upper limit threshold and the lower threshold of discharging current;
Service time, computing unit 2012, were used for upper limit threshold and lower threshold according to described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide;
The technical scheme that is provided is provided, under battery mode,, is controlled the output power of battery voluntarily, make that portable computer can be in running order in the time of the reasonable length that the user sets according to the dump energy of storing in the battery.
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 battery service time can be realized that 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:
Battery monitor 203 (GAS Gauge chip) is used to monitor running parameters such as discharging current and dump energy, in be preset with the upper limit threshold and the lower threshold of the battery discharge current of system's minimum load and maximum load correspondence.
Remove this, charge controller 202, and battery monitor 203 also can be embedded in the battery 205, is called the parts of battery 205 inside.Perhaps, battery 205 should provide the corresponding work parameter for battery management platform 201, and these running parameters can be used to obtain the upper limit threshold and the lower threshold of discharging current, the dump energy of battery.The concrete running parameter that it provided should not 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:
The user can be by UI layout setting service time, and this service time is within described service time interval range.Correspondingly, power management need be according to this service time of resetting, Adjustment System use electric loading, as it is backlight to close lcd screen, CPU frequency reducing etc.
Embedded controller 200 can directly be controlled the LCD backlight illumination; Network chip also can be closed it by operating system when not using and be reached purpose of power saving; CPU frequency reducing and video card frequency reducing have corresponding existing scheme to realize; USB5V voltage can be closed it by circuit control.
State in realization in the process of technical scheme, adopt program code to realize, and code is left in the battery management platform 201.
Also comprise in the device:
The current threshold evaluation unit is used for working as portable computer under open mode, by the minimum load of described portable computer and the rational upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
Regulon is used to regulate cpu frequency, and LCD backlight illumination, and close external equipment are with the output power of control battery.
User interaction unit (UI) is used to receive user's input information, and obtains the described service time that the user selectes according to described input information.Particularly, can provide a chart, vertical pivot is represented the dump energy (mAh) that battery provides, transverse axis represent dump energy scope service time that can provide, according to formula (1) and (2) as can be seen, the physical significance of straight slope is I*V=CRM/T, wherein, V is a constant, therefore straight slope has directly characterized the size of I, wherein, represent the upper limit threshold and the lower threshold of discharging current among the figure respectively as the slope of two solid lines of straight line, the intersection point of two straight lines and transverse axis formed service time the interval range upper limit and service time the interval range lower limit.Interval service time that the user selects on transverse axis should be between the upper limit and lower limit of interval range service time.
Perhaps, provide numeral, for example, with 0.5 hour minimum particle size as service time, the numeral of demonstration then was 3 hours, 3.5 hours, 4 hours, 4.5 hours, and 5 hours.And the selection of waiting for the user obtains the described service time that the user selectes as input information according to described input information.
As shown in Figure 4, then be the schematic diagram of battery structure circuit, described the electrical connection of battery 205, and described the circuit structure of the inside of embedded controller 200 with embedded controller 200 and user interface 211.Wherein the inside of embedded controller 200 comprises:
Concrete adjustment scheme is selected at user interface 211 places, by the selection of battery management platform 201 according to the user, calculate corresponding adjustment instruction, and send to CPU, LCD, and other device hardware, regulating cpu frequency, LCD backlight illumination and close not at the hardware that uses the output power of control 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 and the lower threshold of described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide; Wherein, be positioned at described service time within described service time of the interval range;
According to the service time of selecting from the user, reset the numerical value of described discharging current.
Can also comprise in the computer:
Regulon is used to regulate cpu frequency, and LCD backlight illumination, and close external equipment are with the output power of control battery.
Embodiments of the invention have following beneficial effect, on the basis of the original performance that possesses of battery, according to the dump energy of battery and the upper limit threshold and the lower threshold of discharging current, calculate dump energy interval range service time that can provide, select in this interval range for the user; And according to the specific time value that the user selects, calculate and the coherent system operating load, this comprises: regulate cpu frequency, LCD backlight illumination and closing not at the hardware that uses meets the battery object time to control the output power of battery, to reach.The user no longer is the dump energy that uses battery passively, but dynamically dump energy is used in control, and is particularly for the portable computer of field work, particularly practical.
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 the actual conditions adjustment, and in this rights protection scope.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spiritual scope of technical solution of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. manage the battery method of service time for one kind, it is characterized in that, comprising:
Obtain the upper limit threshold of discharging current of battery and the lower threshold of described discharging current; And the dump energy that obtains battery;
According to the upper limit threshold and the lower threshold of described dump energy and described discharging current, calculate described dump energy interval range service time that can provide;
According to the service time of selecting from the user, reset the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
2. method according to claim 1 is characterized in that, described calculate described dump energy interval range service time that can provide specifically comprise:
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, and physical unit is a watt-hour;
I is a discharging current, and then Imin represents the lower threshold of described discharging current, and Imax represents the upper limit threshold of described discharging current;
V is a cell voltage.
3. method according to claim 1 is characterized in that, the described numerical value that resets described discharging current specifically comprises:
With the setting value of described discharging current is average discharge current;
Obtaining real-time discharging current in one-period also compares described real-time discharging current and described average discharge current, described real-time discharging current is during greater than described average discharge current, by regulating cpu frequency, LCD backlight illumination and/or close external equipment diminish with the discharging current of controlling battery; Described real-time discharging current is not regulated during smaller or equal to described average discharge current.
4. method according to claim 2 is characterized in that, the service time that described user selectes, specifically determines in the following manner:
Set up chart, the vertical pivot of described chart is represented the dump energy that battery provides, the transverse axis table of described chart
Show dump energy interval range service time that can provide;
Interval service time selected on transverse axis of user then should be between described service time the interval range upper limit and described service time interval range lower limit.
5. manage the battery device of service time for one kind, it is characterized in that, comprising:
The current threshold acquiring unit is used to obtain the dump energy of battery, the upper limit threshold of discharging current and the lower threshold of discharging current;
Service time, computing unit was used for upper limit threshold and lower threshold according to described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide;
The discharge setup unit is used for basis from the service time that the user selectes, and resets the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
6. device according to claim 5 is characterized in that, also comprises:
The current threshold evaluation unit is used for working as portable computer under open mode, by the minimum load of described portable computer and the upper limit threshold and the lower threshold of maximum load preestimating battery discharging current.
7. device according to claim 5 is characterized in that, also comprises:
Regulon is used to regulate cpu frequency, and LCD backlight illumination and/or close external equipment are to control the numerical value of described discharging current;
Cycle detection unit is used in one-period detected real-time discharging current and average discharge current being compared, and described real-time discharging current is notified described regulon during greater than described average discharge current; Wherein, the described discharging current after the setting is described average discharge current.
8. device according to claim 5 is characterized in that,
User interaction unit is used to receive user's input information, and obtains the described service time that the user selectes according to described input information.
9. a portable computer is characterized in that, comprising:
Battery is used for storage of electrical energy, and provides discharging current for portable computer;
Register is used to deposit the upper limit threshold of discharging current of battery and the lower threshold of described discharging current;
System Management Bus is connected with battery, register;
The battery management platform is connected with described System Management Bus, is used to obtain the upper limit threshold and the lower threshold of the discharging current of described battery, the dump energy of the electric energy of battery storage;
And according to the upper limit threshold and the lower threshold of described dump energy and described discharging current, calculate battery dump energy interval range service time that can provide;
According to the service time of selecting from the user, reset the numerical value of described discharging current; Wherein, be positioned at described service time within described service time of the interval range.
10. portable computer according to claim 9 is characterized in that, also comprises:
Regulon is used to regulate cpu frequency, and LCD backlight illumination and/or close external equipment are with the discharging current of control battery.
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