Evaluation apparatus and evaluation method of sheet type cell

Patent metadata

Field	Value
Publication number	US-10036780-B2
Application number	US-201114342870-A
Country	US
Kind code	B2
Filing date	Sep 5, 2011
Priority date	Sep 5, 2011
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

An electrode probe is brought into contact with a measurement part on an outer surface of at least one of the positive electrode and the negative electrode of a sheet type cell, and quantity of electricity is measured at the measurement part, so as to evaluate the sheet type cell. The electrode probe may be connected to a voltage meter and to a charge source or a discharge source, and the evaluation made by detecting a charge characteristic that changes the cell from a non-charged state to a fully charged state, a discharge characteristic that changes the cell from a fully charged state to the non-charged state, or a measurement voltage of the voltage meter when the cell is in the fully charged state.

First claim

The invention claimed is:

1. An evaluation method of a sheet type secondary cell for evaluating a charging and/or discharging characteristic of the sheet type secondary cell capable of charging and/or discharging and in which a storage layer that stores electrons during charging operation and that releases the electrons during a discharging operation is sandwiched by layers of a positive electrode and a negative electrode, the evaluation method comprising the step of
bringing an electrode probe into electrical contact with a first of a plurality of measurement parts on an outer surface of at least one of the positive electrode and the negative electrode, and measuring an electric characteristic value at the first measurement part, so as to evaluate a charging and/or discharging characteristic of the sheet type secondary cell and to perform identification of an abnormal area in the sheet type secondary cell,
wherein the electrode probe is brought into contact with the outer surface of one of the positive electrode and the negative electrode, and a fixed electric potential is applied to the entire electrode of the other of the positive electrode and the negative electrode,
wherein a charge source and a voltage meter are connected to the electrode probe, the charge source supplies charging power to the to the first measuring part via the electrode probe, and a charge characteristic is detected from a change in a measurement voltage of the voltage meter as the sheet type secondary cell is charged from a non-charged state to a fully charged state, so as to evaluate the charging and/or discharging characteristic of the sheet type secondary cell,
wherein the sheet type secondary cell is divided into said plurality of measurement parts, each having a same size and configuration,
wherein the first measurement part is changed to another of the plurality of measurement parts by movement of at least one of the electrode probe and the sheet type secondary cell, and the electric characteristic value is measured at each of the plurality of measurement parts so as to make an evaluation,
wherein measurement results and evaluation results at each of the plurality of the measurement parts are output collectively and displayed or printed out as a greyscale image of the secondary cell whose greyscale values are indicative of normality or abnormality for each of the measurement parts.

2. The evaluation method of the sheet type secondary cell according to claim 1 ,
wherein a discharge source and a voltage meter are connected to the electrode probe, the discharge source extracts an electric current via the electrode probe, and a discharge characteristic that changes the sheet type secondary cell from a fully charged state to a non-charged state is detected from a change in a measurement voltage of the voltage meter, so as to evaluate charging and/or discharging characteristic of the sheet type secondary cell.

3. The evaluation method of the sheet type secondary cell according to claim 1 ,
wherein a charge source and a voltage meter are connected to the electrode probe, a discharge source extracts an electric current via the electrode probe, and a measurement voltage of the voltage meter is detected when the sheet type secondary cell is in a fully charged state, so as to evaluate the charging and/or discharging characteristic of the sheet type secondary cell.

4. The evaluation method of the sheet type secondary cell according to claim 1 ,
wherein two or more of the electrode probes for the different measurement parts are provided, a discharge source and a voltage meter that are provided for each of the electrode probes are used, or the discharge source and the voltage meter that are common to the respective electrode probes and are connected, by switching, to each of the electrode probes are used, and a voltage after the charging is measured at the respective measurement parts via the respective electrode probes, so as to evaluate the charging and/or discharging characteristic of the sheet type secondary cell based on magnitude of two or more measurement voltages.

5. The evaluation method of the sheet type secondary cell according to claim 1 ,
wherein the two electrode probes for the different measurement parts are provided, and a current flowing between the two electrode probes is measured by an ammeter, so as to evaluate the charging and/or discharging characteristic of the sheet type secondary cell based on a measurement current.

6. An evaluation method of the sheet type secondary cell according to claim 1 ,
wherein a plurality of the electrode probes that are brought into contact with the outer surface of the positive electrode or the negative electrode, and a probe selection circuit that selects any of the plurality of the electrode probes to form a circuit element of a measurement circuit are provided, and
wherein the electrode probes selected by the probe selection circuit measure the electric characteristic value at a plurality of the measurement parts, so as to make an evaluation.

7. An evaluation method of the sheet type secondary cell according to claim 1 , wherein the measurement results include a measurement value and a measurement process value for each measurement part, the measurement process value being a difference between a measurement value for a respective part and an average of the measurement values for the plurality of measurement parts, and the measurement process value being compared with a threshold to a respective said measurement part is normal or abnormal.

8. An evaluation apparatus of a sheet type secondary cell for evaluating a charging and/or discharging characteristic of the sheet type secondary cell capable of charging and/or discharging in which a storage layer that stores electrons during charging operation and that releases the electrons during a discharging operation is sandwiched by layers of a positive electrode and a negative electrode, the evaluation apparatus comprising:
an electrode probe that is configured to be brought into electrical contact with a first of a plurality of measurement parts on an outer surface of at least one of the positive electrode and the negative electrode;
a measurement evaluation unit that configured to measure an electric characteristic value at the measurement part via the electrode probe, so as to evaluate the charging and/or discharging characteristic of the sheet type secondary cell and to perform identification of an abnormal area in the sheet type secondary cell;
a charge source connected to the electrode probe;
a relative movement mechanism configured to move at least one of the electrode probe and the sheet type secondary cell so as to allow the first measurement part to change to another of the plurality of measurement parts;
a collective output unit that collectively outputs measurement results and evaluation results at the plurality of the measurement parts for display or print-out as a greyscale image of the secondary cell whose greyscale values are indicative of normality or abnormality for each of the plurality of measurement parts,
wherein the electrode probe is configured to be brought into contact with the outer surface of one of the positive electrode and the negative electrode, and a fixed electric potential is applied to the entire electrode of the other of the positive electrode and the negative electrode,
wherein the charge source supplies charging power to the to the first measuring part via the electrode probe, and the measurement evaluation unit is configured to detect a charge characteristic from a change in a measurement voltage of a voltage meter contained therein as the sheet type secondary cell is charged from a non-charged state to a fully charge state, so as to evaluate t

Assignees

• Dewa Harutada
• Hiwada Kiyoyasu
• Nihon Micronics Kk

Inventors

• Dewa Harutada
• Hiwada Kiyoyasu

Classifications

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• G01R1/07314

  the body of the probe being perpendicular to test object, e.g. bed of nails or probe with bump contacts on a rigid support (on an elastic support, e.g. a film, G01R1/0735) · CPC title

• G01R31/385 Primary

  Arrangements for measuring battery or accumulator variables (for monitoring G01R31/382) · CPC title

• G01R31/378

  specially adapted for the type of battery or accumulator · CPC title

• G01R31/364

  Battery terminal connectors with integrated measuring arrangements · CPC title