Secondary battery internal pressure measurement method
AssigneeSK On Co., Ltd.
InventorSang Jun Park
Life of this patent
Estimating the term…
Abstract
In order to more accurately measure internal pressure of a secondary battery, the present disclosure provides a measurement method including (a) interposing the secondary battery between an upper plate and a lower plate, (b) increasing internal pressure of the secondary battery by injecting a gas into the inside of the secondary battery, (c) monitoring surface pressure of the secondary battery at a measuring member which is in contact with the lower plate, and (d) measuring a value of the surface pressure from the measuring member at a point in time when at least one sealing portion of the secondary battery is vented.
Claims12
A method of measuring an internal pressure of a secondary battery comprising:
- (a) interposing the secondary battery between an upper plate and a lower plate;
- (b) increasing the internal pressure of the secondary battery by injecting a gas into the inside of the secondary battery;
- (c) monitoring surface pressure of the secondary battery at a measuring member which is in contact with the lower plate;
- and
- (d) measuring a value of the surface pressure from the measuring member at a point in time when at least one sealing portion of the secondary battery is vented,
- wherein the gas in step (b) is injected at a predetermined time interval, and the internal pressure in step (b) is constantly increased to a desired level,
- wherein the gas in step (b) is injected through a hole into the inside of the secondary battery,
- wherein the secondary battery includes a first area at the lower plate where the surface pressure is measured and a second area comprising a space at the hole where the gas is injected into the inside of the secondary battery, and
- wherein the first area where the surface pressure is measured is separated from the second area where the internal pressure is measured.
Dependencies are inferred from the claim text.