Method of propagation test on battery system
First Claim
1. A method of propagation test on a battery system including a plurality of cells, each having an outer member made of metal including a closed container made of metal, the method comprising:
- a main irradiation step of irradiating a laser beam in prescribed conditions, on a light-receiving part of the outer member of a light-receiving cell, which is one of the cells, the light-receiving part being made of metal, or on a light-receiving part made of metal which is arranged in contact with the outer member of the light-receiving cell, thereby to heat the light-receiving cell;
a thermal runaway confirming step of confirming a thermal runaway of the light-receiving cell, while the main irradiation step is being performed;
an irradiation stopping step of stopping the laser-beam irradiation after the thermal runaway was confirmed in the thermal runaway confirming step;
a system integrity inspection step of inspecting an integrity of the cells other than the light-receiving cell in the battery system after the irradiation stopping step; and
before the main irradiation step;
a preliminary irradiation step irradiating laser beams of different conditions on a preliminary test light-receiving member made of metal having a preliminary test light-receiving part same in structure on the light-receiving part; and
an irradiation condition selecting step, of selecting an irradiation condition, in which a melted scar is formed on the preliminary test light-receiving part, on a basis of a result of the preliminary irradiation step;
whereinthe prescribed conditions are conditions in which a melted scar is formed on the light-receiving part, andin the main irradiation step, the laser beam is irradiated in the irradiation condition selected in the irradiation condition selecting step.
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Abstract
A method of propagation test on a battery system has: a main irradiation step of irradiating a laser beam in prescribed conditions, on a light-receiving part of the outer member of a light-receiving cell, or on a light-receiving part which is arranged in contact with the outer member of the light-receiving cell, thereby to heat the light-receiving cell; a thermal runaway confirming step of confirming a thermal runaway of the light-receiving cell; an irradiation stopping step of stopping the laser-beam irradiation after the thermal runaway was confirmed in the thermal runaway confirming step; and a system integrity inspection step of inspecting an integrity of the cells other than the light-receiving cell after the irradiation stopping step. The prescribed conditions are conditions in which a melted scar is formed on the light-receiving part.
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Citations
9 Claims
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1. A method of propagation test on a battery system including a plurality of cells, each having an outer member made of metal including a closed container made of metal, the method comprising:
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a main irradiation step of irradiating a laser beam in prescribed conditions, on a light-receiving part of the outer member of a light-receiving cell, which is one of the cells, the light-receiving part being made of metal, or on a light-receiving part made of metal which is arranged in contact with the outer member of the light-receiving cell, thereby to heat the light-receiving cell; a thermal runaway confirming step of confirming a thermal runaway of the light-receiving cell, while the main irradiation step is being performed; an irradiation stopping step of stopping the laser-beam irradiation after the thermal runaway was confirmed in the thermal runaway confirming step; a system integrity inspection step of inspecting an integrity of the cells other than the light-receiving cell in the battery system after the irradiation stopping step; and before the main irradiation step; a preliminary irradiation step irradiating laser beams of different conditions on a preliminary test light-receiving member made of metal having a preliminary test light-receiving part same in structure on the light-receiving part; and an irradiation condition selecting step, of selecting an irradiation condition, in which a melted scar is formed on the preliminary test light-receiving part, on a basis of a result of the preliminary irradiation step;
whereinthe prescribed conditions are conditions in which a melted scar is formed on the light-receiving part, and in the main irradiation step, the laser beam is irradiated in the irradiation condition selected in the irradiation condition selecting step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification