WO2017090932A1 - 이차전지 - Google Patents
이차전지 Download PDFInfo
- Publication number
- WO2017090932A1 WO2017090932A1 PCT/KR2016/013209 KR2016013209W WO2017090932A1 WO 2017090932 A1 WO2017090932 A1 WO 2017090932A1 KR 2016013209 W KR2016013209 W KR 2016013209W WO 2017090932 A1 WO2017090932 A1 WO 2017090932A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulating tape
- electrode
- attachment
- line
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/595—Tapes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a secondary battery, and more particularly, to a secondary battery having a step difference generated between an electrode and an insulating tape.
- a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged.
- Such a secondary battery is widely used in advanced electronic devices such as phones, notebook computers, and camcorders.
- the secondary battery includes an electrode assembly in which a positive electrode, a separator, and a negative electrode are sequentially stacked and wound in a jelly-roll shape, a can in which the electrode assembly is accommodated, and a cap assembly mounted in an opening of the can, wherein the positive electrode tab is formed on the positive electrode. It is coupled, the negative electrode tab is coupled to the negative electrode.
- an insulating tape is attached to the positive electrode to which the positive electrode tab is coupled and the negative electrode to which the negative electrode tab is coupled to increase insulation.
- the secondary battery according to the prior art has a problem that a step occurs between the positive electrode or the negative electrode and the end of the insulating tape, there is a problem that the disconnection and ignition occurs due to the step.
- an object of the present invention is to form a step between the end of the positive or negative electrode and the insulating tape by forming both ends of the insulating tape attached to the electrode assembly to correspond to or overlap each other. Eliminates, and to provide a secondary battery that prevents disconnection and fire.
- a secondary battery according to the present invention for achieving the above object is an electrode assembly in which a plurality of electrodes and a plurality of separators are alternately stacked and wound;
- An inner insulating tape attached to an inner surface of the electrode, the inner start tape having a first start point (a) and an end point of attachment point (b) surrounding the central portion of the electrode assembly once while being positioned at line A toward the winding center of the electrode assembly;
- the attachment start point (c) and the attachment end point (d) is located at the line B toward the winding center of the electrode assembly once the center of the electrode assembly It may include an outer insulating tape wrapping.
- the A line and the B line may be offset.
- the A line and the B line may be positioned to be offset by 1 mm to 32 mm along the circumference of the electrode having the inner and outer insulating tapes.
- the A line and the B line may be identically located.
- the attachment start point (a) and the attachment end point (b) of the inner insulating tape may not overlap each other.
- the attachment start point c and the attachment end point d of the outer insulating tape may not overlap each other.
- An end portion of the outer insulating tape having the attachment end d of the outer insulating tape may overlap by the length between the A line and the B line.
- An end portion of the outer insulating tape having the attachment start point c of the outer insulating tape may overlap by the length between the A line and the B line.
- the electrode to which the inner and outer insulating tapes are attached may be a positive electrode.
- An electrode tab may be coupled to an inner side surface of the electrode to which the inner insulating tape is attached.
- the inner insulating tape and the outer insulating tape may have the same width.
- the present invention has the following effects.
- the present invention can increase the strength and insulation of the electrode by attaching the outer and inner insulating tape to the outer and inner sides of the electrode to which the electrode tab of the electrode assembly is coupled, respectively.
- both ends of the outer and inner insulating tapes are attached to correspond to each other so that the step between the insulating tape and the electrode can be removed, and disconnection and ignition can be prevented.
- the present invention can increase the strength of the electrode by attaching the opposite ends of the outer and inner insulating tape to each other.
- FIG. 1 is a cross-sectional view showing a secondary battery according to the present invention.
- Figure 2 is a cross-sectional view before the winding of the electrode assembly according to the first embodiment of the present invention.
- Figure 3 is a cross-sectional view after the winding of the electrode assembly according to the first embodiment of the present invention.
- FIG. 4 is an enlarged view of a portion C shown in FIG. 3;
- FIG. 5 is an enlarged view illustrating an electrode assembly according to a second exemplary embodiment of the present invention.
- FIG. 6 is a sectional view before the winding of the first electrode according to the first example of the second embodiment
- FIG. 7 is a cross-sectional view during the winding of the first electrode according to the first example of the second embodiment
- FIG. 8 is a sectional view before the winding of a first electrode according to a second example of the second embodiment
- FIG. 9 is a cross-sectional view during the winding of a first electrode according to a second example of the second embodiment.
- the secondary battery 100 includes an electrode assembly in which a plurality of electrodes 111 and a plurality of separators 112 having electrode tabs coupled thereto are alternately stacked. 110, a can 120 in which the electrode assembly 110 is accommodated, and a cap assembly 130 mounted in an opening of the can 120.
- the core 101 is inserted into the center of the electrode assembly 110.
- the electrode assembly 110 is provided as a jelly-roll electrode assembly, as shown in FIG. 2, and includes a plurality of electrodes 111 provided in a sheet form and a sheet form interposed between the plurality of electrodes 111. It includes a separator 112 provided with.
- the plurality of electrodes 111 may include first and second electrodes 111a and 111b, and the plurality of separators 112 may include first and second separators 112a and 112b.
- the electrode assembly 110 has a structure in which the first electrode 111a, the first separator 112a, the second electrode 111b, and the second separator 112b are sequentially stacked and wound.
- electrode tabs 113 and 114 are coupled to the front end or the end of the plurality of electrodes 111, respectively. That is, the first electrode tab 113 connected to the cap assembly 130 is coupled to the front end of the first electrode 111a, and the first electrode tab 113 is connected to the bottom surface of the can 120 at the end of the second electrode 111b.
- the two electrode tabs 114 are coupled.
- the first electrode may be an anode
- the second electrode may be a cathode.
- an insulating tape for preventing short may be attached to the electrode to which the electrode tab is coupled.
- the electrode assembly 110 includes an inner insulating tape 115 provided on the inner surface of the first electrode 111a to which the first electrode tab 113 is coupled, and An outer insulating tape 116 is provided on the outer surface of the first electrode 111a corresponding to the inner insulating tape 115.
- the inner insulating tape 115 is attached to the inner surface of the first electrode 111a to which the first electrode tab 113 is coupled so as to wind the electrode assembly 110 by one rotation, and the outer insulating tape 116 is on the inner side.
- the electrode assembly 110 is attached to the outer side surface of the first electrode 111a corresponding to the insulating tape 115 so as to wind one rotation.
- the inner insulating tape 115 is attached to the inner surface of the first electrode 111a, and the start point (a) and the end point (b) of attachment of the inner insulating tape 115 are attached.
- the outer insulating tape 116 is the first electrode 111a corresponding to the inner insulating tape 115.
- the center of the electrode assembly 110 is attached to the outer surface of the electrode assembly, and the attachment start point (c) and the attachment end point (d) of the outer insulating tape 116 are positioned at a line B toward the winding center of the electrode assembly 110. It will be wrapped once. That is, the electrode assembly 110 increases the insulation property of the first electrode 111a to which the first electrode tab 113 is coupled by the inner and outer insulating tapes 115 and 116 which surround the electrode assembly 110 once. Can be.
- the A line and the B line may be located coincident. That is, the line A where the attachment start point a and the attachment end point b of the inner insulation tape 115 meet and the line B where the attachment start point c and the attachment end point d of the outer insulation tape 116 meet match each other. In this case, a step difference between the inner insulating tape 115 and the outer insulating tape 116 may be prevented.
- the A line and the B line may be located to be offset from each other. That is, the line A where the start point of attachment (a) and the end point of attachment (b) of the inner insulating tape 115 meet, and the line B where the start point of attachment (c) and the end point (d) of the outer insulating tape 116 meet each other are different from each other.
- the offset position may increase the strength of the first electrode 111a provided between the inner insulating tape 115 and the outer insulating tape 116.
- the A line and the B line may be 1mm ⁇ 32mm, preferably 5mm shifted along the circumference of the first electrode 111a to which the inner and outer insulating tapes 115 and 116 are attached. That is, when the distance between the A-line and the B-line is less than 1 mm, the distance between the A-line and the B-line is small, so that the strength of the first electrode 111a cannot be increased. If the distance between the A-line and the B-line is less than 1 mm, the strength of the first electrode 111a can be increased. As the outer insulating tapes 115 and 116 are used more than necessary, unnecessary expense may be generated. As a result, the A line and the B line may be offset by 1 mm to 32 mm, thereby minimizing the cost and increasing the strength of the first electrode.
- the attachment start point (a) and the attachment end point (b) of the inner insulating tape 115 is formed so as not to overlap with each other, it is possible to prevent the generation of steps.
- the attachment start point c and the attachment end point d of the outer insulating tape 116 are formed so as not to overlap each other, thereby preventing a step difference from occurring.
- the inner insulating tape 115 and the outer insulating tape 116 may have the same width.
- the inner insulating tape 115 and the outer insulating tape 116 may have the same width as the first electrode 111a. Accordingly, the inner insulation tape 115 and the outer insulation tape 116 may increase the widthwise insulation property and strength of the first electrode 111a.
- the secondary battery 100 according to the first embodiment of the present invention can increase the insulation and strength of the electrode by attaching the inner insulating tape and the outer insulating tape to the inner and outer surfaces of the electrode to which the electrode tab is coupled, respectively. In addition, it is possible to prevent the occurrence of a step to prevent disconnection and fire.
- the secondary battery 100 can reduce the step by the inner insulating tape and the outer insulating tape, the attachment start point (a) and the end point of attachment of the inner insulating tape 115 ( There is a possibility that the strength of the electrode located at the end where b) meets or the end where the attachment start point c and the attachment end point d of the outer insulating tape 116 meet meets.
- the inner insulating tape 115 and the outer insulating tape 116 are partially attached to each other to prevent the strength of the electrode from being weakened. can do.
- the secondary battery according to the second exemplary embodiment of the present invention attaches the inner insulating tape and the outer insulating tape to the inner side and the outer side of the electrode, respectively, and the starting point of the inner insulating tape is smaller than the starting point of the outer insulating tape. Some overlap may be applied by moving forward or by moving back beyond the starting point of the outer insulation tape.
- the secondary battery 100 includes inner insulating tapes 115 and outer insulating tapes 116 on inner and outer surfaces of the first electrode 111a, respectively.
- the attachment starting point (a) of the inner insulating tape 115 is attached in front of the starting point (c) of the outer insulating tape 116 based on the winding direction (left direction when viewed in FIG. 6).
- the end of the inner insulating tape 115 having the attachment starting point a of the inner insulating tape 115 and the end point of attachment of the outer insulating tape 116 are End portions of the outer insulating tape 116 overlap by the length between the A and B lines.
- the inner start tape 115 and the outer insulation are partially overlapped by the attachment start point a of the inner insulation tape 115 and the end point of attachment of the outer insulation tape 116.
- the weakening of the strength of the first electrode 111a provided between the tapes 116 can be prevented.
- the secondary battery 100 attaches the inner insulating tape 115 and the outer insulating tape 116 to the inner side and the outer side of the first electrode 111, respectively, and the starting point of attachment of the inner insulating tape 115 ( a) is attached after the attachment start point c of the outer insulating tape 116 with respect to the winding direction (left direction as seen in FIG. 8).
- FIG. 9 there is an end point of the inner insulating tape 115 having the attachment end point b of the inner insulating tape 115 and a starting point c of the outer insulating tape 116 attached thereto.
- An end portion of the outer insulating tape 116 overlaps the length between the A line and the B line.
- the inner end tape 115 and the outer insulation are partially overlapped by the attachment end point a of the inner insulation tape 115 and the start point c of the attachment of the outer insulation tape 116.
- the weakening of the strength of the first electrode 111a provided between the tapes 116 can be prevented.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (11)
- 복수의 전극과 복수의 분리막이 교대로 적층되고 권취되는 전극조립체;상기 전극의 내측면에 부착되되, 부착 시작점(a)과 부착 끝점(b)이 상기 전극조립체의 권취 중심을 향하는 A선에 위치하면서 상기 전극조립체의 중심부를 1회 감싸는 내측 절연테이프; 및상기 내측 절연테이프와 대응되는 상기 전극의 외측면에 부착되되, 부착 시작점(c)와 부착 끝점(d)이 상기 전극조립체의 권취 중심을 향하는 B선에 위치하면서 상기 전극조립체의 중심부를 1회 감싸는 외측 절연테이프를 포함하는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 A선과 상기 B선은 어긋나게 위치하는 것을 특징으로 하는 이차전지.
- 청구항 2에 있어서,상기 A선과 상기 B선은 내측 및 외측 절연테이프가 부착된 전극의 둘레를 따라 1mm~32mm 어긋나게 위치하는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 A선과 상기 B선은 일치하게 위치하는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 절연테이프의 부착 시작점(a)와 부착 끝점(b)은 서로 겹쳐지지 않는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 외측 절연테이프의 부착 시작점(c)와 부착 끝점(d)은 서로 겹쳐지지 않는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 절연테이프의 부착 시작점(a)이 권취 방향을 기준으로 상기 외측 절연테이프의 부착 시작점(c) 보다 앞에 부착되고,상기 내측 절연테이프의 부착 시작점(a)이 있는 상기 내측 절연테이프의 단부와 상기 외측 절연테이프의 부착 끝점(d)이 있는 상기 외측 절연테이프의 단부는 상기 A선과 상기 B선 사이의 길이만큼 겹쳐지는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 절연테이프의 부착 시작점(a)이 권취 방향을 기준으로 상기 외측 절연테이프의 부착 시작점(c) 보다 뒤에 부착되고,상기 내측 절연테이프의 부착 끝점(b)이 있는 상기 내측 절연테이프의 단부와 상기 외측 절연테이프의 부착 시작점(c)이 있는 상기 외측 절연테이프의 단부는 상기 A선과 상기 B선 사이의 길이만큼 겹쳐지는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 및 외측 절연테이프가 부착되는 전극은 양극인 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 절연테이프가 부착된 상기 전극의 내측면에는 전극탭이 결합되는 것을 특징으로 하는 이차전지.
- 청구항 1에 있어서,상기 내측 절연테이프와 상기 외측 절연테이프는 동일한 폭을 가지는 것을 특징으로 하는 이차전지.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/552,019 US10505216B2 (en) | 2015-11-26 | 2016-11-16 | Secondary battery |
| CN201680014321.4A CN107408719B (zh) | 2015-11-26 | 2016-11-16 | 二次电池 |
| JP2017543953A JP6419985B2 (ja) | 2015-11-26 | 2016-11-16 | 二次電池 |
| EP16868829.9A EP3249733B1 (en) | 2015-11-26 | 2016-11-16 | Secondary battery |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0166666 | 2015-11-26 | ||
| KR20150166666 | 2015-11-26 | ||
| KR1020160145521A KR102124106B1 (ko) | 2015-11-26 | 2016-11-03 | 이차전지 |
| KR10-2016-0145521 | 2016-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017090932A1 true WO2017090932A1 (ko) | 2017-06-01 |
Family
ID=58763371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2016/013209 Ceased WO2017090932A1 (ko) | 2015-11-26 | 2016-11-16 | 이차전지 |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2017090932A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019069890A1 (ja) * | 2017-10-06 | 2019-04-11 | 三洋電機株式会社 | 非水電解質二次電池 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090082561A (ko) * | 2008-01-28 | 2009-07-31 | 주식회사 엘지화학 | 절연특성이 향상된 전지 |
| KR20100096018A (ko) * | 2009-02-23 | 2010-09-01 | 산요덴키가부시키가이샤 | 권회 전극체의 제조 방법 및 권회 전극체 제조 장치 |
| KR20110007524A (ko) * | 2009-07-16 | 2011-01-24 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR20130020550A (ko) * | 2011-08-18 | 2013-02-27 | 삼성에스디아이 주식회사 | 이차전지 |
| KR20150028790A (ko) * | 2007-05-07 | 2015-03-16 | 소니 주식회사 | 권회형 비수전해질 이차 전지 |
-
2016
- 2016-11-16 WO PCT/KR2016/013209 patent/WO2017090932A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150028790A (ko) * | 2007-05-07 | 2015-03-16 | 소니 주식회사 | 권회형 비수전해질 이차 전지 |
| KR20090082561A (ko) * | 2008-01-28 | 2009-07-31 | 주식회사 엘지화학 | 절연특성이 향상된 전지 |
| KR20100096018A (ko) * | 2009-02-23 | 2010-09-01 | 산요덴키가부시키가이샤 | 권회 전극체의 제조 방법 및 권회 전극체 제조 장치 |
| KR20110007524A (ko) * | 2009-07-16 | 2011-01-24 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR20130020550A (ko) * | 2011-08-18 | 2013-02-27 | 삼성에스디아이 주식회사 | 이차전지 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019069890A1 (ja) * | 2017-10-06 | 2019-04-11 | 三洋電機株式会社 | 非水電解質二次電池 |
| CN111164796A (zh) * | 2017-10-06 | 2020-05-15 | 三洋电机株式会社 | 非水电解质二次电池 |
| JPWO2019069890A1 (ja) * | 2017-10-06 | 2020-10-22 | 三洋電機株式会社 | 非水電解質二次電池 |
| JP7200117B2 (ja) | 2017-10-06 | 2023-01-06 | 三洋電機株式会社 | 非水電解質二次電池 |
| US12062753B2 (en) | 2017-10-06 | 2024-08-13 | Panasonic Energy Co., Ltd. | Nonaqueous electrolyte secondary battery |
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