Manufacturing method for non-aqueous secondary battery
US-2016268648-A1 · Sep 15, 2016 · US
Inspection method of secondary battery
US2016252586A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016252586-A1 |
| Application number | US-201615053525-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 25, 2016 |
| Priority date | Feb 27, 2015 |
| Publication date | Sep 1, 2016 |
| Grant date | — |
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Abstract
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An inspection method of a secondary battery according to the present invention includes: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defective product determination step of determining that the inspection target cell is a non-defective product, when the voltage drop amount is a threshold or less; and an aging step of performing aging after the non-defective product determination step.
First claim
Opening claim text (preview).
What is claimed is: 1 . An inspection method of a secondary battery, comprising: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defective product determination step of determining that the inspection target cell is a non-defective product, when the voltage drop amount is a threshold or less; and an aging step of performing aging after the non-defective product determination step. 2 . The inspection method according to claim 1 , further comprising: an inspection target value calculation step of calculating a value of an inspection target item of the inspection target cell, the value being obtained by performing a multiple regression analysis by use of the voltage drop amount and at least one of an aging temperature and an aging time, wherein, in the non-defective product determination step, it is determined that the inspection target cell is the non-defective product when the calculated value of the inspection target item falls within a standard range. 3 . The inspection method according to claim 1 , wherein: the predetermined voltage is determined based on a voltage of the secondary battery at which a correlation coefficient between a low-temperature output of the secondary battery and the voltage drop amount is 0.8 or more, or a state of charge of the secondary battery at which the correlation coefficient between the low-temperature output of the secondary battery and the voltage drop amount is 0.7 or more. 4 . The inspection method according to claim 1 , wherein in the aging step, a temperature control is performed so that a temperature difference between a plurality of inspection target cells falls within a temperature range set in advance. 5 . The inspection method according to claim 4 , wherein the temperature range is set within a range from −3° C. to +3° C. relative to a reference temperature. 6 . The inspection method according to claim 1 , further comprising: a capacity check step of checking a capacity of the secondary battery performed between the non-defective product determination step and the aging step.
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comprising digital calculation means, e.g. for performing an algorithm · CPC title
Physics · mapped topic
Physics · mapped topic
- G01R31/3675Primary
Physics · mapped topic
Manufacturing or production processes characterised by the final manufactured product · CPC title
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- What does patent US2016252586A1 cover?
- An inspection method of a secondary battery according to the present invention includes: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defecti…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R31/3675. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Sep 01 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).