Method for measuring weight of porous body, and device for measuring weight

Abstract

The invention relates to a weight measuring method, device and program for a porous body, and the weight of the porous body can be measured accurately. The calculation method of the weight of the porous body comprises that the relationship between the penetrating intensity and the actual weight is worked out in advance, and the relationship between the penetrating intensity and the actual weight represents the relationship between the penetrating intensity of irradiated radioactive rays and the actual weight of the porous body in a porous body with random transmittance of light; the porous body to be measured is irradiated by light, and the transmittance of light of the porous body to be measured is measured; the porous body to be measured is irradiated by radioactive rays, and the penetrating intensity of the radioactive rays penetrating the porous body to be measured is measured; and the weight of the the porous body to be measured is calculated in dependence on the relationship between the penetrating intensity and the actual weight, the measured penetrating intensity and the measured transmittance of light.

Description

technical field [0001] The present invention relates to a technique for measuring the weight of a porous body. Background technique [0002] In recent years, the use of secondary batteries (storage batteries) has expanded, and they are widely used in personal computers, portable terminals, electric vehicles, hybrid vehicles, electric bicycles, and electric tools. Among these storage batteries, there are various storage batteries such as alkaline storage batteries typified by nickel-metal hydride storage batteries and nickel-cadmium storage batteries, and lithium-ion secondary batteries. In an alkaline storage battery, a metal tank is filled with a positive electrode, a negative electrode, and a separator that separates them and holds an alkaline electrolyte. [0003] Also, a plurality of alkaline storage batteries are often used as a battery pack, and it is required that the charging and discharging capacities of the individual alkaline storage batteries be as uniform as po...

AI Technical Summary

Problems solved by technology

[0007] A material such as a continuous film-like core material used industrially is large in size, so its properties tend to fluctuate over time, and it is difficult to measure the weight of the active material with high precision in the conventional methods such as Patent Document 1.

Especially when the raw material is a porous body, since the amount of pores present in it is basically likely to change, it is likely to become an obstacle to weight measurement, and it is difficult to measure weight continuously and with high accuracy.

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