Method for testing precursor of secondary cell, its testing instrument, and method for manufacturing secondary cell using the method
First Claim
Patent Images
1. A method for inspecting a secondary battery precursor including a pair of electrodes and a separator disposed between the pair of electrodes, comprising:
- applying a constant inspection voltage between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a current flowing due to application of the inspection voltage; and
determining the precursor to be defective if a current value exceeding a previously set reference current value is detected within a time period corresponding to a time period between starting of voltage application when a voltage is applied to a normal secondary battery precursor and obtaining of a constant current.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is placed between the electrodes. If a current the current value of which exceeds a predetermined reference current value (13) is detected during the time from the start of application of a voltage to a normal secondary cell precursor until the current becomes constant, the precursor is determined to be defective.
-
Citations
28 Claims
-
1. A method for inspecting a secondary battery precursor including a pair of electrodes and a separator disposed between the pair of electrodes, comprising:
-
applying a constant inspection voltage between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a current flowing due to application of the inspection voltage; and
determining the precursor to be defective if a current value exceeding a previously set reference current value is detected within a time period corresponding to a time period between starting of voltage application when a voltage is applied to a normal secondary battery precursor and obtaining of a constant current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 22)
-
-
10. A method for inspecting a secondary battery precursor including a pair of electrodes and a separator disposed between the pair of electrodes, comprising:
-
applying an inspection voltage between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a current flowing due to application of the inspection voltage; and
determining the precursor to be defective if the current has a value beyond a predetermined allowable range calculated based on a current waveform when a voltage is applied to a normal secondary battery precursor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 23)
-
-
18. A method for inspecting a secondary battery precursor including a pair or electrodes, and a separator disposed between the pair of electrodes, comprising:
-
applying an inspection current between the pair of electrodes before an electrolyte solution is injected between the pair of electrodes, and measuring a voltage due to application of the inspection current; and
determining the precursor to be defective if the voltage has a value beyond a predetermined allowable range calculated based on a voltage waveform when a current is applied to a normal secondary battery precursor. - View Dependent Claims (19, 20, 21, 24)
-
-
25. A device for inspecting a secondary battery precursor including a pair or electrodes, and a separator disposed between the pair of electrodes, comprising:
-
voltage application means for applying a voltage between the pair of electrodes;
current measurement means for measuring a current flowing due to application of the voltage;
storage means for storing a reference current value set based on a current when a voltage is applied to a normal secondary battery precursor; and
arithmetic operation means for performing a predetermined arithmetic operation using the reference current value stored in the storage means and a value of the current measured by the current measurement means, so as to determine whether the secondary battery precursor is defective or not. - View Dependent Claims (26)
-
-
27. A device for inspecting a secondary battery precursor including a pair or electrodes, and a separator disposed between the pair of electrodes, comprising:
-
current application means for applying a current between the pair of electrodes;
voltage measurement means for measuring a voltage generated due to application of the current;
storage means for storing a reference voltage value set based on a voltage when a current is applied to a normal secondary battery precursor; and
arithmetic operation means for performing a predetermined arithmetic operation using the reference voltage value stored in the storage means and a value of the voltage measured by the voltage measurement means, so as to determine whether the secondary battery precursor is defective or not. - View Dependent Claims (28)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
-
Original AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
-
InventorsTakahashi, Akira, Kume, Toshiro, Imashuku, Shouichi, Shimada, Mikinari, Tsutsumi, Shuji, Tanahashi, Masakazu, Shoji, Masashi, Igaki, Emiko
-
Granted Patent
-
Time in Patent OfficeDays
-
Field of Search
-
US Class Current324/426
-
CPC Class CodesH01M 10/0525 Rocking-chair batteries, i....H01M 10/4285 Testing apparatusH01M 10/446 Initial charging measuresY02E 60/10 Energy storage using batteriesY02P 70/50 Manufacturing or production...
