Remained capacity meter for storage battery

Abstract

Abstract PURPOSE: To display the remained capacity of a storage battery with accuracy, by A/D converting a signal of the remaining amount of electricity obtained by comparing charged current with discharged current and a signal of the storage battery temperature and carrying out a correction processing in accordance with a temprature, charging efficiency, change in lifetime, and self-discharge of the battery. CONSTITUTION: A storage battery 1 is connected with a charger 2 and load 3 through a change-over switch 5 and a detecting portion 4 adapted to calculate the accumulative discharge and charged electricity and to output an analogue signal which indicates the amount of the electricity left. The analogue signal in proportion to the difference between charged and discharged currents, which is output from the detecting portion 4, is A/D converted at a portion 6 and fed to a digital processing portion 8. A temperature sensing portion 9 is provided in the vicinity of the storage battery 1 so as to detect the temperature of the storage battery 1. The thus-obtained signal is A/D converted at a portion 10 and fed to the digital processing portion 8, in which data pertaining the number of charging operations are input from the charger 2. A memory circuit 13 is provided to store data and operation formulas required for the processing which is performed in the processing portion 8. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Takao Kikuoka
• 👤 Hiroaki Yamamoto
• 👤 Noriyoshi Sasaki
• 👤 Kotaro Wakui
• 👤 Keinosuke Murakami
• 👤 Kazunori Onishi
• 👤 Takeshi Kawamura
• 👤 Hiroshi Noguchi
• 👤 Fumio Ukigaya

Bibliographic Details