JPS6332382A - Measuring circuit for battery - Google Patents

Abstract

PURPOSE:To clearly measure whether or not a battery to be measured is usable by supplying electric power from the battery to be measured to the active element of a speech synthesis part provided between a voltage decision part and an output part. CONSTITUTION:A battery 20 to be measured is set at a measured battery connection part 2, which is connected to a DC-DC conversion part 4. The conversion part 4 secures a voltage for operating the active element such as a LSI, etc., for speech synthesis by boosting the voltage of the battery 20 to be measured as a power source and applies the voltage to a constant voltage circuit 8. A voltage division part 6 divides the boosted voltage by resistances R1 and R2 and sends out the divided voltage to the voltage decision part 12 through an A/D conversion part 10. The decision part 12 decides whether or not the voltage of the battery 20 to be measured after A/D conversion 10 is usable and sends out the decision result to the speech synthesis part 14. The synthesis part 14 synthesizes a speech signal, which is amplified by a power amplifier 16 and then outputted as an audible voice.

Description

TECHNICAL FIELD The present invention relates to a battery measuring circuit, and more particularly to a battery measuring circuit for measuring the state of consumption of a battery to be measured.

BACKGROUND ART Conventionally, in the case of a battery checker for checking the state of battery consumption, for example, the battery to be measured is connected to a passive element such as a meter to display the degree of battery consumption. In this type of meter system, the indication board of the meter indicates "usable" and "unusable" in different colors, and the operator reads the point indicated by the meter needle. There is. Therefore, it is up to the operator to decide whether the battery under test can be used or not, and this can sometimes be difficult, such as when the boundary between usable and unusable is indicated. Ta.

Therefore, as a countermeasure for this improvement, a light emitting diode-Is' (
One possible method is to use a numerical display array (LED) or other active elements to more clearly indicate whether the battery under test can be used or not, but in that case, the other power sources must be used,
The use of another power source also causes the problem that the device itself becomes larger and becomes less convenient to use. Therefore, the battery checker has the drawback of having to use passive elements.

OBJECTS It is an object of the present invention to eliminate the drawbacks of the prior art and to provide a battery measuring circuit that can clearly measure whether a battery under test is usable or not.

DISCLOSURE OF THE INVENTION According to the present invention, there is a connection section for connecting the M measurement battery, a voltage determination section that determines the voltage of the battery to be measured connected to the connection section, and a determination result in the voltage determination section is output. Measurement of a battery with an output section.

In the circuit, the voltage determination section and the output section each include an active element for determining the voltage and converting the result, and the active element is powered by a battery under test connected to the connection section. be.

DESCRIPTION OF EMBODIMENTS Next, embodiments of a battery measuring circuit according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a battery checker to which a battery measuring circuit according to the present invention is applied. Further, FIG. 2 shows a circuit diagram showing the embodiment of FIG. 1 in more detail.

The battery checker according to the Kisara example uses the battery to be measured as a power source and informs whether the battery can be used or not by fF synthesis.

This battery checker has MIs constant battery connection part 2, DC
-DC conversion section 4, voltage division section 6. Constant voltage circuit 8, A/D
Conversion unit 10. Voltage determination section 12, speech synthesis section 14. It has a power amplifier 1B, speed, and power 18.

A battery to be measured 20 serving as a power source is set in the battery to be measured connection unit 2 and is connected to the DC-DC conversion unit 4 . D
The C-DC converter 4 boosts the voltage of the battery under test, which is the power source, to ensure a voltage for operating active elements such as a large-scale integrated circuit (LSI) for voice synthesis, and to maintain a constant voltage. Send to circuit 8.

The voltage dividing unit 6 divides the voltage boosted by the DC-IHI converting unit 4 using a resistor A and a resistor B, so that the voltage of the battery to be measured, which is a power source, is determined by the voltage determining unit 12. The data is sent to the D conversion unit IO.

The constant voltage circuit 8 detects fluctuations in the voltage boosted by the C-DC converter 4, controls the voltage to return to its original state, and supplies stable DC power to each circuit.

The A/D converter 10 boosts the voltage in the Dc-Dc converter 4 and converts the divided voltage in the voltage divider 6 into a digital signal, and sends the voltage to the voltage determiner 12 in order to determine the consumption state of the battery under test. Send.

The voltage determination unit 12 converts the voltage digitized by the A/D conversion unit 10 into f! which is preset in order to determine whether the voltage of the battery to be measured is usable or not. It is compared with a constant reference voltage value to determine whether it can be used or not, and the determination result is sent to the speech synthesis section 14.

The voice synthesis section 14 follows the judgment result of the voltage judgment section 12, and, for example, if the battery can be used, it will say, "It can still be used," and if it cannot, it will say, "It can no longer be used. Please replace the battery with a new one." ” are synthesized and sent to the power amplifier 16.

The power amplifier 16 amplifies the audio signal synthesized by the audio synthesizer 14 so as to output it from the speaker 1B, and the speaker 18 outputs the amplified signal as audible audio.

Next, the operation will be explained.

For example, if the MIM constant battery 20 is subjected to Δ
11 is connected to the constant battery connection section 2. First, the voltage v1 of the battery under test 20 is boosted in the DC-DC converter 4, and the converter 4 converts it into a voltage v2 that allows the circuit to operate even when the voltage of the battery under test, which is the power source, is low. do.

Next, the voltage v2 boosted in the DC-DC conversion unit 4 is attenuated by the resistor R and the resistor R2 of the voltage dividing unit 6, and divided into voltage v3, and the divided voltage v3 is determined in the voltage determination unit 12. Then, the A/D converter lO converts it into a digital voltage DV3.

Next, the voltage DV3 digitized by the A/D converter 10 is converted into a predetermined reference voltage value DV4 for determining whether the voltage of the battery A to be measured is usable or not in the voltage determining unit 12. compare. As a result of comparison, D
If V3 is larger than [lV4 (DV3 > DV4
), it sends an instruction signal informing it that it can be used to the voice synthesis section 14, and if DV3- is smaller than DV4 (DV3≦DV4), it sends an instruction signal informing it that it cannot be used. It is sent to the speech synthesis section 14.

Next, according to the instruction signal from the voltage determination unit 12, for example, if the instruction signal is to inform that it can be used, it synthesizes a voice such as "You can still use it." If it is a notification, the voice synthesis unit 14 synthesizes a voice signal such as "The battery can no longer be used. Please replace it with a new one."

Next, the audio signal synthesized by the audio synthesizer I4 is amplified by the power amplifier 18 and sent to the speaker 18 in order to be output from the speaker 18. Then, it is output from the speaker 18.

As described above, by connecting the OC-OC converter 4 and the constant voltage circuit 8 to the measurement circuit of the battery under test, even if the battery under test, which is the power source, becomes exhausted and the voltage becomes low, the circuit remains tJ [the element can be operated. Note that in this embodiment, an active circuit of a Si-based semiconductor is assumed.

Therefore, since the drive voltage is required to be higher than the battery voltage, the DC-OC converter 4 is required in the circuit. However, when using a device that can operate with a low power supply voltage, The DC converter 4 may not be provided.

Therefore, instead of using conventional display or output methods that require the operator to decide whether or not the battery under test can be used, voice synthesis and light emitting diode (L)
ED) By using a character or numeric display array, it is possible to more clearly display or output to the operator whether or not the battery under test can be used.

Although the present invention was explained using a battery checker in this embodiment, it is also possible to incorporate a water-side foot circuit into devices that use batteries as a power source, such as toys or precision equipment, to warn of battery consumption during use. can also be applied.

In addition, the determination reference voltage value set in the voltage determination unit IO is only a criterion for determining whether or not the battery can be used in this embodiment. It is also possible to indicate the state of battery depletion step by step, such as "Please prepare the next battery."

Effects According to the present invention, in a battery measurement circuit that uses the battery under test as a power source, the active element can be operated even when the battery under test, which is the power source, is exhausted and has a low voltage.
The device can clearly notify the operator of battery depletion status and warnings using methods such as voice synthesis and light emitting diode (LED) character or numeric display arrays, and does not require any other power source. Enables miniaturization and weight reduction.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a battery checker to which a battery measuring circuit according to the present invention is applied. FIG. 2 is a circuit diagram of an embodiment of the battery checker shown in FIG. 1. Explanation of part symbols 299. Measured battery electrode reading section 4 , , DC-DC converting section 6014 voltage dividing section 801 . Constant voltage circuit 10. , , A/D conversion section 12...voltage judgment section 14, ..speech synthesis section 11, .power amplifier 18, ..speaker 20, .. side constant battery patent applicant Fuji Photo Film Co., Ltd. agent Takao Katori Takao Maruyama

Claims (1)

[Claims] 1. A connecting part for connecting a battery to be measured, a voltage determining part to determine the voltage of the battery to be measured connected to the connecting part, and outputting a determination result in the voltage determining part. In the battery measuring circuit, the voltage determination unit and the output unit each include an active element that determines the voltage and outputs the result, and the active element is connected to the connection unit. A battery measurement circuit characterized in that power is supplied from a battery to be measured. 2. In the battery measuring circuit according to claim 1, the measuring circuit has a transformer circuit, and the transformer circuit boosts the voltage of the battery under test to supply power to the active element. Characteristic battery measurement circuit. 3. In the battery measuring circuit according to claim 1 or 2, the output section outputs the result of the determination of the battery under test in the voltage determination section in the form of audio. Battery measurement circuit.