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Measurement system

A measurement system and measurement range technology, applied in the field of measurement systems, can solve problems such as low detection accuracy

Active Publication Date: 2014-01-29
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, since the wider the range of the physical quantity of the detection object is, the detection unit needs to be configured so as to be able to detect the maximum value within the range, so the lower the detection value, the lower the detection accuracy.

Method used

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Embodiment Construction

[0039] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

[0040] This embodiment is a form in which the present invention is applied to calculation of the remaining capacity of a battery in a battery pack of an electric tool. Such as figure 1 As shown, the battery pack 1 is a device equipped with a battery (secondary battery) 11 inside, and is configured to be able to charge the battery 11 from the charger 3 by being connected to the charger 3 . in, figure 1 A state in which the battery pack 1 is attached to the charger 3 and both are electrically connected is shown.

[0041] Additionally, if figure 2 As shown, the battery pack 1 is configured to be attachable to and detachable from the electric tool 5 , and by attaching to the electric tool 5 , the electric power of the battery 11 can be supplied to the electric tool 5 to operate the electric tool 5 . in, figure 2 A state in which the battery pack 1 is attached to the...

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Abstract

A measurement system (1, 3; 5) according to one aspect of the present invention includes a battery pack (1) and at least one type of connected device (3; 5) to which the pack (1) is connected. The pack (1) includes a first detection device (14) detecting a predetermined physical quantity in the pack (1) and having a predetermined measurement range. The connected device (3; 5) includes a second detection device (34; 54) detecting a physical quantity the same as the predetermined physical quantity and having a measurement range different from the range of the first detection device (14). One of the pack (1) and the connected device (3; 5) includes a receiving device (13) and a measurement processing device (13) that performs a predetermined measurement process by using one of: a detection-value-related information received by the receiving device (13); and a detection result by one device of the first detection device (14) and the second detection device (34; 54), the one device being provided in one of the pack and the connected device.

Description

technical field [0001] The present invention relates to a measurement system for measuring physical quantities in a battery pack. Background technique [0002] As a battery pack incorporating a secondary battery, a function of calculating the remaining capacity of the secondary battery is known. For example, the remaining capacity calculated from the battery pack is used for various purposes such as simply displaying the remaining capacity of the secondary battery in an electric tool that incorporates the battery pack and operates based on electric power from the secondary battery. [0003] Various methods for calculating the remaining capacity of a secondary battery are known. For example, Patent Document 1 describes a method for detecting the discharge current by using a current detection unit in the assembled battery, and sequentially accumulating the discharge current to calculate the discharge capacity. A technique in which the charge capacity is subtracted from the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3648G01R31/3606G01R31/382H01M10/4257H02J7/00036H02J7/00047Y02E60/10H02J7/0013H02J7/0048H02J7/00034
Inventor 野田将史铃木均福本匡章梅村卓也
Owner MAKITA CORP
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