JPH0367180A - Battery-down detecting method - Google Patents
Battery-down detecting methodInfo
- Publication number
- JPH0367180A JPH0367180A JP1202923A JP20292389A JPH0367180A JP H0367180 A JPH0367180 A JP H0367180A JP 1202923 A JP1202923 A JP 1202923A JP 20292389 A JP20292389 A JP 20292389A JP H0367180 A JPH0367180 A JP H0367180A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- time
- detection method
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Measurement Of Current Or Voltage (AREA)
- Power Sources (AREA)
- Emergency Alarm Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、システム情報等を記憶させておく不揮発性メ
モリをバンクアップするバフテリの電圧ダウンを検知す
るバッテリダウン検知方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a battery-down detection method for detecting a voltage drop in a battery that banks up a non-volatile memory that stores system information and the like.
従来のバッテリダウン検知方法では、バッテリの電圧が
ある一定値ＶＡ（バックアップ電圧の限界値ＶＢ＋マー
ジン）を下回ったことを検出し、この検出結果をシステ
ムのユーザに通知するものとしていた。In the conventional battery-down detection method, it is detected that the battery voltage has fallen below a certain value VA (backup voltage limit value VB+margin), and the system user is notified of this detection result.
しかしながら、上述した従来のパフテリダウン検知方法
では、バッテリやバックアップするメモリ等の特性によ
るバッテリの損失特性のばらつきにより、バッテリ電圧
がＶＡからＶＢになる時間が一律でなくなるため、バッ
テリダウンを検知してからのバッテリ交換時期が不明確
である問題があった・
〔課題を解決するための手段〕
本発明はこのような課題を解決するためになされたもの
で、一定時間毎にバッテリの電圧をサンプリングし、こ
のサンプリング結果に基づきバッテリの電圧損失特性を
予測し、この予測電圧損失特性に基づきバッテリの適切
な交換時期を通知するようにしたものである。However, in the conventional puff battery down detection method described above, the time required for the battery voltage to change from VA to VB is not uniform due to variations in battery loss characteristics due to the characteristics of the battery, backup memory, etc. There was a problem in which the timing of battery replacement was unclear. [Means for solving the problem] The present invention was made to solve this problem. The voltage loss characteristics of the battery are predicted based on the sampling results, and the appropriate time to replace the battery is notified based on the predicted voltage loss characteristics.
したがってこの発明によれば、予測電圧損失特性に基づ
き、バフテリの適切な交換時期がシステムのユーザへ通
知される。Therefore, according to the present invention, the user of the system is notified of the appropriate time to replace the buff battery based on the predicted voltage loss characteristics.
以下、本発明に係るパフテリダウン検知方法を詳細に説
明する。Hereinafter, the puff tissue down detection method according to the present invention will be explained in detail.
第２図はこのバッテリダウン検知方法の適用された回路
構成図であり、１はバッテリ、２はバッテリ電圧測定用
Ｈ／Ｗ、３は不揮発性メモリである。FIG. 2 is a circuit configuration diagram to which this battery-down detection method is applied, in which 1 is a battery, 2 is a battery voltage measurement H/W, and 3 is a nonvolatile memory.
このような構成において、バッテリ電圧測定用Ｈ／Ｗ２
をアクセスすると、バッテリ１の電圧値をサンプリング
することができ、これを一定時間毎に行うことにより、
第３図に示すような電圧損失特性を得ることができる。In such a configuration, the battery voltage measurement H/W2
By accessing , you can sample the voltage value of battery 1, and by doing this at regular intervals,
Voltage loss characteristics as shown in FIG. 3 can be obtained.
なお、第３図において、ｖＯはバッテリ１の初期電圧値
で、ＶＢはバンクアップ電圧の限界値である。In addition, in FIG. 3, vO is the initial voltage value of the battery 1, and VB is the limit value of the bank-up voltage.
第１図に第３図におけるＡ−Ａ’間の拡大図を示す。観
測時間１．とｔ２との間の電圧差をΔＶ１、同じ＜ｔｚ
とｔ、との間の電圧差をΔＶ２、ｔ、とｔ４との間の電
圧差をΔＶ３、ｔ４とｔ。FIG. 1 shows an enlarged view of the line AA' in FIG. 3. Observation time 1. The voltage difference between and t2 is ΔV1, the same < tz
and t, the voltage difference between t, ΔV2, t, and t4, ΔV3, t4 and t.
との間の電圧差をΔ■４とする。今、ΔＶ１とΔｖ２の
値がサンプリングされているとき、Δｖ３は下記の式で
近似することができる。Let the voltage difference between the two be Δ■4. Now, when the values of ΔV1 and Δv2 are sampled, Δv3 can be approximated by the following formula.
ΔＶ３＝Δ■２＋（Δ■２−ΔＶｌ）
＝２＊ΔＶ２−Δｖ１
同様にして、ｔＮ＋＋ と１Ｎでの電圧差ΔｖＮは、Δ
ＶＮ＝ （Ｎ−１）＊ΔＶ２
− （Ｎ−２）＊ΔＶ１・・・（１）
で表される。（１）式より、ｔＮでの電圧値ＶＮは、Ｖ
Ｎ＝Ｖ１−（ΔＶ１＋Δ■２＋ΔＶ３＋ΔＶ４＋ΔＶ５
＋・・・ΔＶＮ）
＝Ｖ１−Σ（ΔＶｉ）
＝Ｖ１−Ｎ＊ （２＊Δｖ１−ΔＶ２）−Ｎ＊ （Ｎ＋
１）＊ （ΔＶ２−Δｖｌ）／２・（２）
で表すことができる。ΔV3=Δ■2+(Δ■2−ΔVl) =2*ΔV2−Δv1 Similarly, the voltage difference ΔvN between tN++ and 1N is Δ
VN=(N-1)*ΔV2-(N-2)*ΔV1...(1) It is expressed as follows. From equation (1), the voltage value VN at tN is V
N=V1-(ΔV1+Δ■2+ΔV3+ΔV4+ΔV5
+...ΔVN) =V1-Σ(ΔVi) =V1-N* (2*Δv1-ΔV2)-N* (N+
1) *(ΔV2−Δvl)/2·(2) It can be expressed as follows.
このことにより、ＡＩ機能にて、観測時間以降の電圧値
を予測することができる。ＶＮＯ値がバックアップ電圧
の限界値ＶＢを下回る時間Ｔは、Ｎ＊（サンプリング周
期）で求めることができるため、より適切なバフテリの
交換時期をシステムのユーザに通知することが可能とな
る。This allows the AI function to predict the voltage value after the observation time. Since the time T during which the VNO value falls below the limit value VB of the backup voltage can be determined by N* (sampling period), it becomes possible to notify the system user of a more appropriate time to replace the battery.
以上説明したように本発明によるバッテリダウン検知方
法によると、一定時間毎にバッテリの電圧をサンプリン
グし、このサンプリング結果に基づきバッテリの電圧損
失特性を予測し、この予測電圧損失特性に基づきバッテ
リの適切な交換時期を通知するようにしたので、バッテ
リの適切な交換時期がシステムのユーザへ通知されるも
のとなり、その交換時期が明確となる。As explained above, according to the battery down detection method according to the present invention, the voltage of the battery is sampled at regular intervals, the voltage loss characteristics of the battery are predicted based on the sampling results, and the battery is properly adjusted based on the predicted voltage loss characteristics. Since the appropriate time to replace the battery is notified, the user of the system is notified of the appropriate time to replace the battery, and the time to replace the battery becomes clear.
第１図は第３図におけるＡ−Ａ’間の拡大図、第２図は
本発明に係るバッテリダウン検知方法の適用された回路
構成図、第３図はバッテリ電圧測定用Ｈ／Ｗをアクセス
して得られるバッテリの電圧損失特性を示す図である。
１・・・バッテリ、２・・・バソテリ電圧測定用Ｈ／Ｗ
、３・・・不揮発性メモリ。
第１図
第２図
第３図Figure 1 is an enlarged view between A-A' in Figure 3, Figure 2 is a circuit configuration diagram to which the battery-down detection method according to the present invention is applied, and Figure 3 is an access to the battery voltage measurement H/W. FIG. 2 is a diagram showing voltage loss characteristics of a battery obtained by 1... Battery, 2... H/W for measuring battery voltage
, 3...Nonvolatile memory. Figure 1 Figure 2 Figure 3
Claims (1)
ンを検知するバッテリダウン検知方法において、一定時
間毎に前記バッテリの電圧をサンプリングし、このサン
プリング結果に基づき前記バッテリの電圧損失特性を予
測し、この予測電圧損失特性に基づき前記バッテリの適
切な交換時期を通知するバッテリダウン検知方法。In a battery down detection method for detecting a voltage drop in a battery that backs up non-volatile memory, the voltage of the battery is sampled at regular intervals, the voltage loss characteristics of the battery are predicted based on the sampling results, and the predicted voltage loss is A dead battery detection method that notifies an appropriate time to replace the battery based on characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202923A JPH0367180A (en) | 1989-08-07 | 1989-08-07 | Battery-down detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1202923A JPH0367180A (en) | 1989-08-07 | 1989-08-07 | Battery-down detecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0367180A true JPH0367180A (en) | 1991-03-22 |
Family
ID=16465400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1202923A Pending JPH0367180A (en) | 1989-08-07 | 1989-08-07 | Battery-down detecting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0367180A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04130911A (en) * | 1990-09-21 | 1992-05-01 | Mitsubishi Electric Corp | Voltage monitor |
| JPH05289784A (en) * | 1992-03-13 | 1993-11-05 | Internatl Business Mach Corp <Ibm> | Battery-driven computer and battery power monitor method for battery-driven computer |
| EP0803959A2 (en) * | 1996-04-25 | 1997-10-29 | Nokia Mobile Phones Ltd. | Battery monitoring |
-
1989
- 1989-08-07 JP JP1202923A patent/JPH0367180A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04130911A (en) * | 1990-09-21 | 1992-05-01 | Mitsubishi Electric Corp | Voltage monitor |
| JPH05289784A (en) * | 1992-03-13 | 1993-11-05 | Internatl Business Mach Corp <Ibm> | Battery-driven computer and battery power monitor method for battery-driven computer |
| EP0803959A2 (en) * | 1996-04-25 | 1997-10-29 | Nokia Mobile Phones Ltd. | Battery monitoring |
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