CN100351739C - Battery stock correction device and its correction method of portable computer - Google Patents
Battery stock correction device and its correction method of portable computer Download PDFInfo
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- CN100351739C CN100351739C CNB2004100068852A CN200410006885A CN100351739C CN 100351739 C CN100351739 C CN 100351739C CN B2004100068852 A CNB2004100068852 A CN B2004100068852A CN 200410006885 A CN200410006885 A CN 200410006885A CN 100351739 C CN100351739 C CN 100351739C
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Abstract
The present invention relates to a battery stock detecting device which is used for detecting battery voltages in a portable computer. The battery stock detecting device comprises a voltage source, an A/D converter and a calculating unit, wherein the voltage source and a battery are respectively and electrically connected to two input ends of the A/D converter, and thus, the voltages of the voltage source and the battery are respectively converted into a battery stock signal and a reference signal. The calculating unit picks the battery stock signal and the reference signal, and the voltage value of the battery is calculated according to the proportional relationship between the two signals.
Description
Technical field
The invention relates to a kind of battery inventory detecting device and detection method thereof of portable computer device, especially a kind ofly provide accurate reference voltage, so that battery inventory detecting device and the detection method thereof with calibration function to be provided.
Background technology
Along with electronic industry develops fast, electronic product is in functional promotion, and the portability of product is also emphasized gradually.Therefore, develop and portable notebook computer, PDA (Personal Digital Assistant) and mobile phone etc.Can normal operation in order to make these portable computer devices not need external power supply, all be provided with battery in the inside of these computer apparatus, for operating needed power supply.
Electric energy reserves in the battery are fixed, and therefore, the storage of power supply can descend gradually along with the use of computer apparatus, up to driving the computer apparatus running.Decommission for fear of computer apparatus suddenly, cause data not as good as storing, or predetermined work is interrupted suddenly, in computer apparatus, the capital adds a power supply inventory detecting device, at any time detect the interior power supply storage of battery and remind the user, decommission to avoid computer apparatus to arise suddenly, and the user is not as good as reaction.
Please refer to Fig. 1, show a typical power supply inventory detecting device 100, this device is to be installed within the mobile phone, and the user is provided the battery storage of monitoring mobile phone at any time.As shown in FIG., the voltage V that battery 180 is provided is that (Analog Digital Converter ADC) 120 is converted to digital signal S ' via an analog-digital converter.Subsequently, this digital signal S ' is again via a display unit 150, being converted to image 160 (promptly a typical image shows as shown in FIG.) or numeral shows, since the storage of battery usually with the proportional relation of its magnitude of voltage that can provide, therefore show or quantity shows the electrolytic cell 180 interior existing power supply storages that can allow the user by this image.
In this device, inevitably, the making error amount of each electronic component in the analog-digital converter 120 will cause the digital signal S ' of output to produce error.Illustrate, if the voltage that battery provides is 3.3V, and this analog-digital converter is the converter of one 12 bits, if analog-digital converter has 5% simulation error, change the error of the digital signal of back generation, thereby cause the user that the judgement of power supply storage in the battery is produced deviation 4096 * 5%=205 rank.
In order to compensate this transformed error value, please refer to Fig. 2, a typical method is outside analog-digital converter 120, adds a voltage compensation element 130 to adjust the magnitude of voltage of analog-digital converter 120 earth terminal B.Illustrate: if the voltage that battery provides is 3.3V, be 3.5V and detect the magnitude of voltage that obtains through analog-digital converter 120, the magnitude of voltage that promptly should improve earth terminal is to 0.2V, with the error of compensation actual voltage value and detection threshold.
Yet the method has following shortcoming:
One, increases voltage compensation element 130 to adjust the ground voltage value of analog-digital converter 120, will increase cost of manufacture simultaneously.
Two, the making error amount of each analog-digital converter 120 and unequal, the needed voltage compensation value of each analog-digital converter 120 is also inequality, therefore, even increased voltage compensation element 130, each voltage compensation element 130 still will be set respectively according to needed voltage compensation value.
Summary of the invention
In view of this, the present invention proposes a kind of battery stock detection method of portable computer device.Directly use the touch panel on the portable computer device, use the input interface that the testing staff detects as, use and carry out this testing.
The invention provides a kind of battery inventory detecting device, detect the storage of this battery by the voltage level to be measured that detects battery in the portable computer device.This battery inventory detecting device comprises a voltage source, an analog-digital converter and a computing unit.Voltage source and battery are electrically connected to two input ends of analog-digital converter respectively, use voltage to be measured and fixed voltage are converted to battery voltage signal and reference signal respectively.Computing unit captures above-mentioned battery voltage signal and reference signal, and, calculate the magnitude of voltage to be measured of this battery according to the proportionate relationship of this binary signal, thereby obtain the storage of this battery.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 is the synoptic diagram of a representative cells inventory detecting device.
Fig. 2 is the synoptic diagram that a typical case revises the method for analog digital transformed error.
Fig. 3 is the synoptic diagram of battery inventory detecting device of the present invention.
Embodiment
Please refer to Fig. 3, shown that the present invention is in order to detect battery inventory detecting device 200 1 preferred embodiments of battery storage in the portable computer device.As shown in FIG., battery inventory detecting device 200 comprises a voltage source 240, an analog-digital converter 220, a computing unit 260 and a display unit 250.Analog-digital converter 220 has two input end 220a that are separated from each other, and is electrically connected to voltage source 240 and mesuring battary 280 respectively, and, having two output terminal 220b that are separated from each other, the signal after the output conversion is to computing unit 260.Switching motion by analog-digital converter 220, the voltage level R of voltage source 240 produces a reference signal X ' through conversion and exports computing unit 260 to, simultaneously, the voltage P of mesuring battary 280 produces a battery voltage signal Y ' and exports computing unit 260 to also through this conversion.
Generally speaking, because voltage source 240 passes through identical transfer process with the voltage R and the P of mesuring battary 280, be converted to reference signal X ' and battery voltage signal Y '.Therefore, reference signal X ' and battery voltage signal Y ' should include the hardware error value of same ratio.Illustrate, if analog-digital converter 220 has positive 5% hardware error value, at the voltage R that voltage source 240 provides is under the situation of 3.3V, and the pairing magnitude of voltage of reference signal X ' that conversion back produces should be 3.465V (3.3V+3.3V * 5%=3.465V).In like manner, if the voltage level that battery 240 really provides is P, the corresponding voltage P ' of battery voltage signal Y ' that produces after changing is equivalent to P+P * 5%.
By above-mentioned, can find reference signal X ' and battery voltage signal Y ' are divided by, can eliminate the hardware error value of analog-digital converter 220, and can really be corresponded to reference signal X and the battery voltage signal Y of voltage source 240 and mesuring battary 280, and this ratio X/Y is equal to the voltage ratio R/P of voltage source 240 and mesuring battary 280.Also therefore, (being under the situation of the known genuine reference signal X that just corresponding to voltage source 240) under the condition of the voltage level R of given voltage source 240, computing unit 260 can be by reference signal X ' and battery voltage signal Y ', directly calculates the pairing battery voltage signal Y of mesuring battary 280 real voltages (Y=XY '/X ').This digital signal Y transmission display unit 250 again is converted to image or numeral demonstration, inspects existing power supply storages in the battery 280 so that the user to be provided.
Because the voltage level R that voltage source 240 is provided is as the measuring basis of mesuring battary 280 voltages, therefore, the voltage R of voltage source 240 must keep necessarily, and, must with computing unit 260 cognitive reference signal X corresponding, it is correct to guarantee that computing unit 260 calculates the battery voltage signal Y of mesuring battary 280.
As above-mentioned, for fixing voltage R is provided, with regard to a preferred embodiment, above-mentioned analog-digital converter 220 is made in the portable computer device with computing unit 260, and voltage source 240 adopts the mode that adds.Simultaneously, in order to simplify processing procedure, analog-digital converter 220 can integrate with computing unit 260, directly produces the output of battery voltage signal Y.
Conventional batteries inventory detecting device 100 compared to Fig. 1, battery inventory detecting device 200 proposed by the invention does not need to know the making error amount of analog-digital converter 220, the i.e. accurate making error amount of each electronic component in the compensating analog digital quantizer 120 is with the voltage P of accurate measurement mesuring battary 180.
In addition, please refer to Fig. 2, compared to traditionally in battery inventory detecting device 100, increase voltage compensation element 130 and make error to revise, battery inventory detecting device 200 provided by the present invention has following advantage:
One, the present invention does not adjust the magnitude of voltage of analog-digital converter 220 earth terminal B, therefore, need not increase voltage compensation element 130, in other words, can reduce the installation cost of battery inventory detecting device.
Two, the present invention's indivedual deviations that analog-digital converter 220 is made of need not worrying even the making error amount of each analog-digital converter 220 has nothing in common with each other, can also see through the present invention and will make error amount the influence of battery voltage measurement value is eliminated.
Three, hold above-mentioned the indivedual deviations on analog-digital converter 220 is made because the present invention need not worry, therefore, battery inventory detecting device 200 does not need distinctly to set yet, and makes required time cost and can save.
The above is to utilize preferred embodiment to describe the present invention in detail, but not limit the scope of the invention, and know present technique field person and can both understand, suitably do slightly change and adjustment, will not lose main idea of the present invention place, also not break away from the spirit and scope of the present invention.
Claims (4)
1, a kind of battery inventory detecting device detects this battery storage by the voltage level that detects the battery in the portable computer device, and this pick-up unit comprises:
One voltage source provides a fixed voltage;
One analog-digital converter has two input ends, is electrically connected to this battery and this voltage source respectively, and, respectively voltage to be measured and this fixed voltage are converted to a battery voltage signal and a reference signal; And
One computing unit captures this battery voltage signal and this reference signal, and calculates magnitude of voltage to be measured according to the proportionate relationship of this binary signal, thereby obtains the storage of this battery.
2, device as claimed in claim 1 is characterized in that, the ratio that this magnitude of voltage to be measured is equivalent to this battery voltage signal and this reference signal is multiplied by this fixed voltage value.
3, device as claimed in claim 1 is characterized in that, this analog-digital converter and this computing unit are arranged in this portable computer device.
4, a kind of method that detects the battery storage is used for portable computer device, detects this battery storage by the voltage level that detects this battery, and this method comprises:
Utilize analog-digital converter that the voltage transitions of the battery in this portable computer device is become a battery voltage signal;
One voltage source with fixed voltage is electrically connected to this analog-digital converter, uses converting this fixed voltage to a reference signal; And
Utilize the proportionate relationship of this battery voltage signal and this reference signal, calculate magnitude of voltage to be measured, thereby obtain this battery storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100068852A CN100351739C (en) | 2004-02-20 | 2004-02-20 | Battery stock correction device and its correction method of portable computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100068852A CN100351739C (en) | 2004-02-20 | 2004-02-20 | Battery stock correction device and its correction method of portable computer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1658126A CN1658126A (en) | 2005-08-24 |
| CN100351739C true CN100351739C (en) | 2007-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100068852A Expired - Fee Related CN100351739C (en) | 2004-02-20 | 2004-02-20 | Battery stock correction device and its correction method of portable computer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341084A (en) * | 1991-12-12 | 1994-08-23 | Fujitsu Limited | Method and device for determining and indicating a residual capacity of a battery |
| JPH09212265A (en) * | 1996-01-31 | 1997-08-15 | Matsushita Electric Ind Co Ltd | Battery remaining capacity detecting device |
| CN1229195A (en) * | 1998-02-20 | 1999-09-22 | 索尼株式会社 | Cell voltage detection circuit, and method of detecting cell votage |
| CN1410779A (en) * | 2002-11-14 | 2003-04-16 | 倚天资讯股份有限公司 | Device for automatically calibrating displayed battery electric quantity of electronic equipment and its display method |
-
2004
- 2004-02-20 CN CNB2004100068852A patent/CN100351739C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341084A (en) * | 1991-12-12 | 1994-08-23 | Fujitsu Limited | Method and device for determining and indicating a residual capacity of a battery |
| JPH09212265A (en) * | 1996-01-31 | 1997-08-15 | Matsushita Electric Ind Co Ltd | Battery remaining capacity detecting device |
| CN1229195A (en) * | 1998-02-20 | 1999-09-22 | 索尼株式会社 | Cell voltage detection circuit, and method of detecting cell votage |
| CN1410779A (en) * | 2002-11-14 | 2003-04-16 | 倚天资讯股份有限公司 | Device for automatically calibrating displayed battery electric quantity of electronic equipment and its display method |
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| Publication number | Publication date |
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| CN1658126A (en) | 2005-08-24 |
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