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1. US20120099618 - Secondary battery temperature-estimating apparatus and method

Office United States of America
Application Number 13382736
Application Date 07.07.2010
Publication Number 20120099618
Publication Date 26.04.2012
Grant Number 08684596
Grant Date 01.04.2014
Publication Kind B2
IPC
G01K 13/00
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
13Adaptations of thermometers for specific purposes
G01K 1/00
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
1Details of thermometers not specially adapted for particular types of thermometer
CPC
G01K 13/10
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
13Adaptations of thermometers for specific purposes
10for measuring temperature within piled or stacked materials
G01K 7/42
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
7Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat
42Circuits for reducing thermal inertia; Circuits for predicting the stationary value of temperature
G01R 31/3842
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
382Arrangements for monitoring battery or accumulator variables, e.g. SoC
3842combining voltage and current measurements
G01R 31/389
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
389Measuring internal impedance, internal conductance or related variables
H01M 10/486
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
48Accumulators combined with arrangements for measuring, testing or indicating condition, e.g. level or density of the electrolyte
486for measuring temperature
Applicants Nishi Yuji
Toyota Jidosha Kabushiki Kaisha
Takahashi Hidenori
Tazawa Masatoshi
Matsusaka Masanobu
Kaita Keiji
Inventors Nishi Yuji
Takahashi Hidenori
Tazawa Masatoshi
Matsusaka Masanobu
Kaita Keiji
Agents Sughrue Mion, PLLC
Priority Data 2009161923 08.07.2009 JP
Title
(EN) Secondary battery temperature-estimating apparatus and method
Abstract
(EN)

An alternating current impedance-estimating section (106) estimates an alternating current impedance (Rh) of the secondary battery based on electric current (I) and voltage (V) of the secondary battery detected when a ripple generating section causes a ripple current to flow in the secondary battery. A temperature estimating section (108) estimates the temperature (T) of the secondary battery based on the alternating current impedance (Rh) estimated by the alternating current impedance-estimating section (106) with the use of the relation, obtained in advance, between the temperature (T) of the secondary battery and the alternating current impedance (Rh) of the secondary battery at a ripple frequency.