Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for detecting deterioration of secondary battery

A technology of deterioration state and charging state, which is applied in the field of estimating the internal impedance or internal resistance of the secondary battery and determining the deterioration state of the secondary battery

Active Publication Date: 2011-02-02
FURUKAWA ELECTRIC CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, it is known that the impedance of a battery generally depends on the magnitude of the charge and discharge current caused by the above-mentioned normal operation, and it is difficult to accurately estimate the degree of deterioration and discharge capacity in this environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for detecting deterioration of secondary battery
  • Method and apparatus for detecting deterioration of secondary battery
  • Method and apparatus for detecting deterioration of secondary battery

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0150] figure 1 It is a block diagram showing a battery deterioration state detection and charge state detection device according to the first embodiment of the present invention.

[0151] in figure 1 Among them, the battery 1 and the discharging circuit 3 that controls the current supplied from the battery 1 to the load 2, the charging circuit 4 for supplying charging power, are used to measure the deterioration state of the open loop, the deterioration state detection of the state of charge, and the state of charge The detection unit 10 is connected.

[0152] The deterioration state detection and charge state detection unit 10 includes: an internal impedance measurement unit 11, which is connected to the positive and negative electrodes of the battery 1 to measure the internal impedance of the battery 1; an internal impedance storage unit 12, which stores internal impedance data; and an internal impedance correction unit 13. It obtains the internal impedance data from the inter...

no. 2 approach

[0186] Picture 8 It is a block diagram showing a battery deterioration detection and state-of-charge detection device according to the second embodiment of the present invention. Picture 8 Middle and figure 1 The same reference numerals indicate the same elements.

[0187] in Picture 8 Here, the storage battery 1 is connected to the load 2 via the discharging circuit 3, and is further connected to the charging circuit 4 and the deterioration state detection and charge state detection unit 30. In addition, a first ammeter 6 is connected between the charging circuit 4 and the battery 1, and a second ammeter 7 is connected between the load 2 and the battery 1.

[0188] As shown in the above-mentioned embodiment, the deterioration state detection and charge state detection unit 30 includes: an internal impedance measurement unit 11; an internal impedance storage unit 12; an internal impedance correction unit 13; an internal impedance calculation unit 14; a battery temperature measur...

no. 3 approach

[0209] Picture 11 It is a block diagram showing a schematic configuration of a vehicle power supply device according to the third embodiment of the present invention. in Picture 11 Among them, the vehicle power supply device 211 includes a secondary battery 212; various sensors for measuring the current, voltage, and temperature of the secondary battery 212, namely, a current sensor 213, a voltage sensor 214, and a temperature sensor 215. In addition, in order to determine the deterioration of the secondary battery 212, a discharge circuit 216, a control unit 217, and a storage unit 218 are provided.

[0210] The vehicle power supply device 211 is connected to a load 221 composed of various electrical components of the vehicle and an alternator 222, and the secondary battery 212 or the alternator 222 supplies electric power to the load 221. The alternator 222 also supplies charging power for charging the secondary battery 212.

[0211] in Picture 11 In the vehicle power supply ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process of obtaining a charge state amount of an accumulator by charge state amount calculation means according to a set value of a degradation state amount and a process of obtaining a degradation state amount of the accumulator by degradation state amount calculation means according to the charge state amount are repeated by a predetermined number of times not smaller than 2. The degradation state amount obtained lastly by repeating the processes by the predetermined number of times is outputted as a degradation state amount output value. The charge state amount obtained lastly is outputted as a charge state amount output value. The degradation state amount output value is stored in a memory.

Description

technical field [0001] The present invention relates to technical fields such as a method for judging the deterioration state of a secondary battery that supplies power to a load, and particularly relates to estimating the internal impedance or internal resistance of a secondary battery, and judging the secondary battery based on the estimation result. The technical field of the secondary battery deterioration judgment method of the deterioration state of the battery, etc. Background technique [0002] As a method of detecting the state of charge of the storage battery, there is, for example, a method of estimating the state of charge by measuring the battery voltage using the relationship (linearity) between the battery voltage and the state of charge described in Patent Document 1 below. [0003] When this method is used, a large fluctuation occurs in the battery voltage due to the influence of the polarization state due to charge or discharge, and thus a stable battery v...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
CPCG01R31/3679G01R31/392
Inventor 岩根典靖木村贵史藤村幸司渡边勇一佐藤敏幸岩花史和饭岛崇
Owner FURUKAWA ELECTRIC CO LTD