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MarketScreener Homepage  >  Equities  >  Tokyo  >  Toyo Tire Corp    5105   JP3610600003

TOYO TIRE CORP

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“Assembled Battery Manufacturing Method Using Used Batteries, And Assembled Battery” in Patent Application Approval Process (USPTO 20190227125): Toyo Tire Corporation

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08/14/2019 | 05:56pm EDT

2019 AUG 14 (NewsRx) -- By a News Reporter-Staff News Editor at Japan Daily Report -- A patent application by the inventors Fukuda, Takeshi (Itami-shi, Japan); Suzuki, Aya (Itami-shi, Japan), filed on March 21, 2017, was made available online on July 25, 2019, according to news reporting originating from Washington, D.C., by NewsRx correspondents.

This patent application is assigned to Toyo Tire Corporation (Itami-shi, Hyogo, Japan).

The following quote was obtained by the news editors from the background information supplied by the inventors: “In recent years, sealed secondary batteries represented by lithium ion secondary batteries (which may hereafter be simply referred to as ‘secondary batteries’) are used not only in mobile devices such as portable phones and notebook-type personal computers but also as a power source for electric vehicles such as electric automobiles and hybrid automobiles. For use in electric vehicles, an assembled battery constituted by connection of a plurality of secondary batteries is used. Even when the vehicles are discarded, the mounted assembled battery may still be in a usable state. Also, when the assembled battery is replaced due to inconvenience of some of the secondary batteries constituting the assembled battery, the secondary batteries other than those in inconvenience may still be in a usable state. In this manner, it is proposed that the secondary batteries collected after being used (which may hereafter be referred to as used batteries) are recycled for use without being discarded.

“In the numerous used batteries that have been collected, batteries that were used in various types of environments are mixedly present, so that the degree of deterioration of the batteries may differ battery by battery. For this reason, depending on the method of combining and assembling the batteries, the deterioration may be considerably promoted as compared with the case in which new batteries are combined with each other and assembled. Patent Documents 1 and 2 may be mentioned as examples of the documents that refer to recycling of the batteries.

“Patent Document 1 describes measuring an internal resistance of a battery and discarding the batteries having an internal resistance larger than or equal to a threshold value. However, it is difficult to select batteries by only making reference to the internal resistance. There may be cases in which, even when the internal resistance is low, the deterioration is promoted depending on the method of connecting the batteries.

“Patent Document 2 describes discarding a battery when the capacity of the battery is lower than a discard threshold value. However, it seems that there may be cases in which, even when the capacity is low, the battery is usable by suppressing deterioration depending on the method of connecting the battery.”

In addition to the background information obtained for this patent application, NewsRx journalists also obtained the inventors’ summary information for this patent application: “Problems to be Solved by the Invention

“The present disclosure has been made in view of such circumstances, and an object thereof is to provide an assembled battery manufacturing method using used batteries and an assembled battery that are capable of suppressing deterioration.

“Means for Solving the Problems

“To solve the foregoing problem, the present disclosure employs means as described below.

“According to the present disclosure, there is provided an assembled battery manufacturing method using used batteries, wherein said assembled battery includes a serial body constituted by series connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring a residual capacity in a fully charged state for each of a plurality of batteries which are candidate batteries to constitute said serial body; a step of selecting batteries constituting said serial body from among the plurality of candidate batteries on a basis of the residual capacities; and a step of forming said serial body by only connecting the selected batteries in series, wherein said step of selecting the batteries includes selecting only the batteries wherein an absolute value of difference between the residual capacity of each battery and a maximum residual capacity among the batteries constituting said serial body is within 10% of said maximum residual capacity.

“By performing this process, a situation in which the battery having a small residual capacity is overcharged and overly discharged to promote the deterioration can be avoided, so that an assembled battery can be manufactured in which the deterioration is not promoted even when the used batteries are used.

“According to the present disclosure, there is provided an assembled battery manufacturing method using used batteries, wherein said assembled battery includes a parallel body constituted by parallel connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring an internal resistance and a remaining active material amount for each of a plurality of batteries which are candidate batteries to constitute said parallel body; a step of calculating an evaluation value which is obtained by dividing a reciprocal of a value of said internal resistance by said remaining active material amount; a step of selecting batteries constituting said parallel body from among the plurality of candidate batteries on a basis of the evaluation values; and a step of forming said parallel body by only connecting the selected batteries in parallel, wherein said step of selecting the batteries includes selecting only the batteries wherein an absolute value of difference between the evaluation value of each battery and a maximum evaluation value among the batteries constituting said parallel body is within 10% of said maximum evaluation value.

“By performing this process, a situation in which the electric current amount per active material of the battery having a small internal resistance increases to promote the deterioration can be avoided, so that an assembled battery can be manufactured in which the deterioration is not promoted even when the used batteries are used.

“According to the present disclosure, there is provided an assembled battery manufacturing method using used batteries, wherein said assembled battery includes a serial body constituted by series connection of a plurality of parallel bodies, each of said parallel bodies being constituted by parallel connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring a residual capacity in a fully charged state, an internal resistance, and a remaining active material amount for each of a plurality of batteries which are candidate batteries to constitute said assembled battery; a step of calculating an evaluation value which is obtained by dividing a reciprocal of a value of said internal resistance by said remaining active material amount; a step of selecting batteries constituting each of said parallel bodies from among the plurality of candidate batteries on a basis of the evaluation values, and forming each of said parallel bodies by only connecting, the selected batteries in parallel; and a step of selecting parallel bodies constituting said serial body from among the plurality of parallel bodies on a basis of the residual capacities, and forming said serial body by only connecting the selected parallel bodies in series, wherein said step of selecting the batteries constituting each of said parallel bodies includes selecting only the batteries wherein an absolute value of difference between the evaluation value of each battery and a maximum evaluation value among the batteries constituting each of said parallel bodies is within 10% of said maximum evaluation value, and said step of selecting the parallel bodies constituting said serial body includes selecting only the parallel bodies wherein an absolute value of difference between the residual capacity of each parallel body and a maximum residual capacity among, the parallel bodies constituting said serial body is within 10% of said maximum residual capacity.

“By performing this process, a situation in which the electric current amount per active material of the battery having a small internal resistance increases to promote the deterioration can be avoided, and also a situation in which the battery having a small residual capacity is overcharged and overly discharged to promote the deterioration can be avoided, so that air assembled battery can be manufactured in which the deterioration is not promoted even when the used batteries are used.

“According to the present disclosure, there is provided an assembled battery using used batteries, wherein said assembled battery comprises a serial body constituted by series connection of a plurality of batteries, and an absolute value of difference between a residual capacity in a fully charged state of each battery constituting said serial body and a maximum residual capacity among the batteries constituting said serial body is within 10% of said maximum residual capacity.

“With this construction, a situation in which the battery having a small residual capacity is overcharged and overly discharged to promote the deterioration can be avoided, so that an assembled battery can be provided in which the deterioration is not promoted even when the used batteries are used.

“According to the present disclosure, there is provided an assembled battery using used batteries, wherein said assembled battery comprises a parallel body constituted by parallel connection of a plurality of batteries, and an absolute value of difference between an evaluation value, which is obtained by dividing a reciprocal of an internal resistance value by a remaining active material amount, of each battery constituting said parallel body and a maximum evaluation value among the batteries constituting said parallel body is within 10% of said maximum evaluation value.

“With this construction, a situation in which the electric current amount per active material of the battery having a small internal resistance increases to promote the deterioration can be avoided, so that an assembled battery can be provided in which the deterioration is not promoted even when the used batteries are used.

“According to the present disclosure, there is provided an assembled battery using used batteries, wherein said assembled battery comprises a serial body constituted by series connection of a plurality of parallel bodies, each of said parallel bodies being constituted by parallel connection of a plurality of batteries, an absolute value of difference between an evaluation value, which is obtained by dividing a reciprocal of an internal resistance value by a remaining active material amount, of each battery constituting each of said parallel bodies and a maximum evaluation value among the batteries constituting each of said parallel bodies is within 10% of said maximum evaluation value, and an absolute value of difference between a residual capacity in a fully charged state of each parallel body constituting said serial body and a maximum residual capacity among the parallel bodies constituting said serial body is within 10% of said maximum residual capacity.

“With this construction, a situation in which the electric current amount per active material of the battery having a small internal resistance increases to promote the deterioration can be avoided and also a situation in which the battery having a small residual capacity is overcharged and overly discharged to promote the deterioration can be avoided, so that an assembled battery can be provided in which the deterioration is not promoted even when the used batteries are used.”

The claims supplied by the inventors are:

“1-9. (canceled)

“10. An assembled battery manufacturing method using used batteries, wherein said assembled battery includes a serial body constituted by series connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring a residual capacity in a fully charged state for each of a plurality of batteries which are candidate batteries to constitute said serial body; a step of selecting batteries constituting said serial body from among the plurality of candidate batteries on a basis of the residual capacities; and a step of forming said serial body by only connecting the selected batteries in series, wherein said step of selecting the batteries includes selecting only the batteries wherein an absolute value of difference between the residual capacity of each battery and a maximum residual capacity among the batteries constituting said serial body is within 10% of said maximum residual capacity.

“11. The assembled battery manufacturing method according to claim 10, wherein said residual capacity is measured on a basis of a deformation amount which is obtained by detecting deformation of each of said batteries.

“12. The assembled battery manufacturing method according to claim 11, wherein means for detecting the deformation of each of said batteries includes a polymer matrix layer containing a magnetic filler and a detection unit that detects change in a magnetic field accompanying the deformation of the polymer matrix layer containing a magnetic filler.

“13. An assembled battery manufacturing method using used batteries, wherein said assembled battery includes a parallel body constituted by parallel connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring an internal resistance and a remaining active material amount for each of a plurality of batteries which are candidate batteries to constitute said parallel body; a step of calculating an evaluation value which is obtained by dividing a reciprocal of a value of said internal resistance by said remaining active material amount; a step of selecting batteries constituting said parallel body from among the plurality of candidate batteries on a basis of the evaluation values; and a step of forming said parallel body by only connecting the selected batteries in parallel, wherein said step of selecting the batteries includes selecting only the batteries wherein an absolute value of difference between the evaluation value of each battery and a maximum evaluation value among the batteries constituting said parallel body is within 10% of said maximum evaluation value.

“14. The assembled battery manufacturing method according to claim 13, wherein said remaining active material amount is measured on a basis of a deformation amount which is obtained by detecting deformation of each of said batteries.

“15. The assembled battery manufacturing method according to claim 14, wherein means for detecting the deformation of each of said batteries includes a polymer matrix layer containing a magnetic filler and a detection unit that detects change in a magnetic field accompanying the deformation of the polymer matrix layer containing a magnetic filler.

“16. An assembled battery manufacturing method using used batteries, wherein said assembled battery includes a serial body constituted by series connection of a plurality of parallel bodies, each of said parallel bodies being constituted by parallel connection of a plurality of batteries, the assembled battery manufacturing method comprising: a step of measuring a residual capacity in a fully charged state, an internal resistance, and a remaining active material amount for each of a plurality of batteries which are candidate batteries to constitute said assembled battery; a step of calculating an evaluation value which is obtained by dividing a reciprocal of a value of said internal resistance by said remaining active material amount; a step of selecting batteries constituting each of said parallel bodies from among the plurality of candidate batteries on a basis of the evaluation values, and forming each of said parallel bodies by only connecting the selected batteries in parallel; and a step of selecting parallel bodies constituting said serial body from among the plurality of parallel bodies on a basis of the residual capacities, and forming said serial body by only connecting the selected parallel bodies in series, wherein said step of selecting the batteries constituting each of said parallel bodies includes selecting only the batteries wherein an absolute value of difference between the evaluation value of each battery and a maximum evaluation value among the batteries constituting each of said parallel bodies is within 10% of said maximum evaluation value, and said step of selecting the parallel bodies constituting said serial body includes selecting only the parallel bodies wherein an absolute value of difference between the residual capacity of each parallel body and a maximum residual capacity among the parallel bodies constituting said serial body is within 10% of said maximum residual capacity.

“17. The assembled battery manufacturing method according to claim 16, wherein said residual capacity is measured on a basis of a deformation amount which is obtained by detecting deformation of each of said batteries.

“18. The assembled battery manufacturing method according to claim 17, wherein means for detecting the deformation of each of said batteries includes a polymer matrix layer containing a magnetic filler and a detection unit that detects change in a magnetic field accompanying the deformation of the polymer matrix layer containing a magnetic filler.

“19. The assembled battery manufacturing method according to claim 16, wherein said remaining active material amount is measured on a basis of a deformation amount which is obtained by detecting deformation of each of said batteries.

“20. The assembled battery manufacturing method according to claim 19, wherein means for detecting the deformation of each of said batteries includes a polymer matrix layer containing a magnetic filler and a detection unit that detects change in a magnetic field accompanying the deformation of the polymer matrix layer containing a magnetic filler.

“21. An assembled battery using used batteries, wherein said assembled battery comprises a serial body constituted by series connection of a plurality of batteries, and an absolute value of difference between a residual capacity in a fully charged state of each battery constituting said serial body and a maximum residual capacity among the batteries constituting said serial body is within 10% of said maximum residual capacity.

“22. An assembled battery using used batteries, wherein said assembled battery comprises a parallel body constituted by parallel connection of a plurality of batteries, and an absolute value of difference between an evaluation value, which is obtained by dividing a reciprocal of an internal resistance value by a remaining active material amount, of each battery constituting said parallel body and a maximum evaluation value among the batteries constituting said parallel body is within 10% of said maximum evaluation value.

“23. An assembled battery using used batteries, wherein said assembled battery comprises a serial body constituted by series connection of a plurality of parallel bodies, each of said parallel bodies being constituted by parallel connection of a plurality of batteries, an absolute value of difference between an evaluation value, which is obtained by dividing a reciprocal of an internal resistance value by a remaining active material amount, of each battery constituting each of said parallel bodies and a maximum evaluation value among the batteries constituting each of said parallel bodies is within 10% of said maximum evaluation value, and an absolute value of difference between a residual capacity in a fully charged state of each parallel body constituting said serial body and a maximum residual capacity among the parallel bodies constituting said serial body is within 10% of said maximum residual capacity.”

URL and more information on this patent application, see: Fukuda, Takeshi; Suzuki, Aya. Assembled Battery Manufacturing Method Using Used Batteries, And Assembled Battery. Filed March 21, 2017 and posted July 25, 2019. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220190227125%22.PGNR.&OS=DN/20190227125&RS=DN/20190227125

(Our reports deliver fact-based news of research and discoveries from around the world.)

Copyright © 2019 NewsRx LLC, Japan Daily Report, source Geographic Newsletters

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