JPH1123677A - Battery capacity detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery capacity detecting device which warns a user before even a battery with a returned voltage under light load or no load reaches a final voltage due to an abrupt voltage drop. SOLUTION: By storing an elapsed time for every predetermined voltage drop value of a normal output voltage in a storage means 3 as a parameter, when the voltage drop of a battery 1 with a steep and short elapsed time is identified by an identifying means 4, it is possible to warn of a battery 1 with low capacity on the basis of the voltage detected by a detecting means 2. In addition, by storing a number of parameters in the storage means 3 according to the degree of exhaustion, it is possible to identify the degree of exhaustion in more detail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery capacity detecting device, and more particularly, to a battery capacity detecting device provided with a means for notifying a user that the remaining battery capacity is low.

[0002]

2. Description of the Related Art In a conventional battery capacity detecting device, as shown in FIG. 4, as the capacity of a battery 1 is consumed and the battery capacity is reduced, the voltage is reduced. However, when light load or no load, the voltage rises again, and it may seem as if the capacity is sufficient when looking only at the voltage value, especially for manganese batteries. Is big.

As shown in FIG. 3, a conventional battery capacity detecting device identifies the remaining capacity of a driving battery 1 such as a personal computer or a word processor only by a detecting means 102, and the voltage drops to a final voltage. In the case where the voltage is set to a value close to the above, the system or the user is warned by the alarm means 105 and the end processing or the like is performed.

[0004]

As described above, in the conventional battery capacity detecting device, a battery whose voltage has been restored with a light load or no load has a sufficient capacity when only the voltage value is viewed. It looks like, and if you continue to use it and it becomes a normal load, shortly after the termination process due to a sharp voltage drop,
There is a possibility that the system stops and data and the like are destroyed.

Accordingly, an object of the present invention is to provide a battery capacity detecting device that warns a user before reaching a cutoff voltage due to a sharp voltage drop even in a battery whose voltage has been restored under a light load or no load.

[0006]

In order to solve the above-mentioned problems, a battery capacity detecting apparatus according to the present invention comprises a battery, a detecting means for detecting an output voltage of the battery, and an output detected by the detecting means. Storage means for storing a parameter of an elapsed time for each predetermined voltage drop value of voltage; and identification means for identifying consumption of the battery by an output voltage detected by the detection means based on the parameters stored in the storage means. A warning means for warning a result of the battery consumption being identified by the identification means.

[0007]

Next, a battery capacity detecting device according to one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a battery capacity detecting device according to an embodiment of the present invention.

FIG. 2 is a voltage drop curve diagram of a battery of the battery capacity detecting device according to one embodiment of the present invention.

As shown in FIG. 1, a battery capacity detecting device according to an embodiment of the present invention includes a battery 1, a load 6 connected to the battery 1, and a detecting means 2 for detecting an output voltage of the battery 1. A storage means 3 for storing a parameter of an elapsed time for each predetermined voltage drop value of the output voltage detected by the detection means 2, and a detection means 2 for detecting the parameter based on the parameters stored in the storage means 3. It comprises an identification means 4 for identifying the consumption of the battery according to the output voltage, and an alarm means 5 for warning the result of the identification of the consumption of the battery 1 by the identification means 4.

Next, the operation of the battery capacity detecting device according to one embodiment of the present invention will be described with reference to the drawings.

The operation of the battery capacity detecting device according to one embodiment of the present invention is as shown in FIG. 1 and FIG. 2, where a curve W is a normal voltage drop curve when the battery 1 is continuously consumed.
Curve X is a voltage drop curve in the case of using the battery 1 whose capacity has not been enough and the voltage has been restored under light load or no load, and the curve W has a gentle voltage drop before reaching the final voltage V4. As a result, the curve X becomes a steep voltage drop, which is detected by the detecting means 2 typified by a voltage detector such as a comparator. The drop time at the unit voltage from the detection voltage V1 to the detection voltage V3 is shorter than the curve W than the curve W. Is shorter.

If the elapsed time for each predetermined voltage drop value of the normal output voltage such as the curve W is stored as a parameter in the storage means 3, the curve X of the curve X is obtained based on the voltage detected by the detection means 2. When the voltage drop of the battery 1 having such a steep and short elapsed time is identified by the identification unit 4, the battery 1 having a small capacity is used.
Alarm is given by the alarm means 5.

Therefore, if some of these parameters are stored in the storage means 3 depending on the degree of wear, it is possible to more finely identify the degree of wear.

[0015]

As described above, according to the battery capacity detecting apparatus of the present invention, if the detection is performed only by the voltage value, even if the remaining capacity is actually small, the detected voltage is a recovered voltage. If you continue to use it, the system will shut down before normal termination processing due to sudden voltage drop,
Since important data and the like are destroyed, it is possible to determine whether the voltage is due to the original capacity or the voltage has been recovered due to a small capacity, and there is an effect that safe capacity management can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a battery capacity detection device according to an embodiment of the present invention.

FIG. 2 is a voltage drop curve diagram of a battery of the battery capacity detection device according to one embodiment of the present invention.

FIG. 3 is a block diagram of a conventional battery capacity detection device.

FIG. 4 is a voltage drop curve diagram of a battery used intermittently in a conventional battery capacity detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 2 Detection means 3 Storage means 4 Identification means 5 Alarm means 6 Load

Claims (1)

[Claims] 1. A battery, detection means for detecting an output voltage of the battery, storage means for storing a parameter of an elapsed time for each predetermined voltage drop value of the output voltage detected by the detection means, and storage means Based on the parameters stored in
A battery capacity comprising: identification means for identifying the consumption of the battery based on the output voltage detected by the detection means; and alarm means for alerting the result of identification of the consumption of the battery by the identification means. Detection device.