JPH04204277A - Battery pack type device - Google Patents

Abstract

PURPOSE:To enable the indication of the quantity of precise residue of a battery even just before a battery pack is mounted again by providing a battery voltage detection part for detecting the voltage of the battery, a storage part for storing the quantity of the residue of the battery and a calculation part for calculating the quantity of the residue of the battery on the basis of information from the battery voltage detection part and the storage part. CONSTITUTION:At the time of full charge a battery voltage detection part 5 monitors the voltage of a charge type battery 4 to transmit its information to a calculation part 7. Next, in the calculation part 7 the information from the battery detection part 5 is compared with the other information of battery capacity from a storage part 6 to find the quantity of the battery residue and its information is transmitted to a control part 8 of the inside of a device body 2. And in the case where a battery pack 3 is detached from the device 1, the calculation of the quantity of battery residue is always performed in the inside itself of the battery pack 3. Further, when the battery pack 3 is mounted on the device 1 again, the quantity of the correct battery residue from the calculation part 7 is output into the control part 8 to show on a display 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a battery pack type device that has a removable battery puncture and is capable of displaying the remaining amount of charge of a rechargeable battery built into the battery pack. .

(Prior Art) Conventionally, in electrical devices powered by a battery pack containing a rechargeable battery, a display circuit is provided to display the remaining battery level when the battery is punctured. It consists of a battery voltage detection section for detecting the battery voltage, a calculation section for calculating the remaining battery power based on the detected battery voltage, and a display section for displaying the calculated remaining power. It is built into the main body.

[Problem to be solved by the invention]

In the conventional electric devices described above, the display circuit consisting of the battery voltage detection section, calculation section, display section, etc. necessary to display the remaining battery power is built into the device body, so the battery pack can be used for a long time. When the time is off or when the battery pack is replaced, the display circuit is disconnected from the battery pack, so information such as battery discharging and charging during this time is no longer transmitted to the display circuit. There is a problem in that it is difficult to accurately display the remaining amount immediately after the battery has been used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a battery pack type device that accurately displays the remaining battery power even immediately after the battery pack is reinstalled.

[Means to solve the problem]

The battery pack type device of the present invention includes a removable battery pack, a battery voltage detection section that detects the voltage of the battery, a storage section that stores the remaining amount of the battery, and information from the battery voltage detection section and the storage section. and a calculation unit that calculates the remaining battery power based on the battery power.

In addition, the main body of the device includes a display section that displays the remaining battery power,
The controller includes a control section that performs processing to display the remaining battery power on the display section based on information from the arithmetic section, and sends information on the remaining battery power to the storage section.

[Function] According to the present invention, since the battery pack itself can calculate the remaining battery power, the calculation continues even when the battery pack is removed from the device, and even immediately after the battery pack is reinstalled. It is possible to accurately display the remaining amount based on the calculation results.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The electric device 1 is composed of a device main body 2 and a battery pack 3 that is detachable from the device main body 2. The battery pack 3 includes a rechargeable battery 4, a battery voltage detection section 5, a storage section 6, and a calculation section 7.

The battery voltage detection section 5 detects the voltage of the rechargeable battery 4. Information corresponding to the battery capacity of the rechargeable battery is given in advance to the storage unit 6 from the outside. The calculation unit 7 calculates the remaining battery level based on the detected value of the battery voltage detection unit 5 and information from the storage unit 6.

On the other hand, the device body 2 includes a control section 8 connected to the arithmetic section 7, and a display section 9 that displays the remaining battery level based on the output of the control section 8.

In such a configuration, for example, when the battery is fully charged, the battery voltage detection unit 5 monitors the voltage of the rechargeable battery 4 each time and sends the information to the calculation unit 7. The calculation section 7 stores the information from the battery voltage detection section 5 and the storage section 6.
A computation is performed to compare the battery capacity information from the two to determine the remaining battery capacity, and the information is sent to the control section 8 inside the device main body 2.

The control unit 8 converts this information on the remaining battery capacity into a predetermined code, and causes the display unit 9 to display the remaining capacity value.

Simultaneously with this display, the control section 8 outputs the remaining amount value to the storage section 6 inside the battery pack 3, and the information is stored in the storage section 6 each time.

Therefore, even when the battery pack 3 is removed from the device 1, the battery pack 3 always calculates the remaining battery power within itself. The remaining battery capacity is constantly calculated based on the discharge of the rechargeable battery 4 and the storage of electricity in the rechargeable battery 4 through charging operations.

Therefore, when this battery pack 3 is reinstalled in the device 1, the correct remaining amount is output from the calculation section 7 to the control section 8, and is also displayed on the display section 9, so that the accurate remaining amount can be confirmed even immediately after reinstallation. It becomes possible to display the amount.

[Effects of the Invention] As explained above, the present invention provides a battery pack with a battery voltage detection section, a storage section, and a calculation section so that the battery pack itself can calculate the remaining battery power. Calculation of the remaining battery power can be continued even when the remaining battery power changes, such as a decrease in the remaining battery power due to the battery being removed from the device and left unused for a long time, or an increase in the remaining battery power due to charging operations. This has the effect of being able to accurately display the remaining battery power even immediately after the battery pack is reinstalled in the device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Electrical device, 2... Device body, 3... Battery pack, 4... Rechargeable battery, 6... Battery voltage detection unit,
6...Storage unit, 7...Calculation unit, 8...Control unit, 9
...Display section.

Claims (1)

[Claims] 1. In a battery pack-type device having a detachable battery pack and having a function of displaying the remaining amount of battery built in the battery pack, the battery pack has a battery voltage. The battery voltage detection unit is characterized in that it includes a battery voltage detection unit that detects the battery voltage, a storage unit that stores the remaining battery level, and a calculation unit that calculates the battery level based on information from the battery voltage detection unit and the storage unit. Battery pack type device. 2. The main body of the device includes a display unit that displays the remaining battery level, and a process for displaying the remaining battery level on this display unit based on information from the calculation unit, and a process for displaying the remaining battery level information in the above-mentioned memory. 2. The battery pack type device according to claim 1, further comprising a control section for sending out data to the battery pack.