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1. 发明公开

US20240030538A1 BATTERY UNIT, BATTERY UNIT ASSEMBLY, POWER TOOL, AND ELECTRIC VEHICLE 审中-公开
公开(公告)号：US20240030538A1
公开(公告)日：2024-01-25
申请号：US18371019
申请日：2023-09-21
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Kenichi OZAWA , Masaki KURATSUKA , Josh CHIANG , Ken CHEN
IPC分类号： H01M50/242 , H01M50/202 , H01M50/224 , H01M50/211 , H01M50/264
CPC分类号： H01M50/242 , H01M50/202 , H01M50/224 , H01M50/211 , H01M50/264 , H01M2220/30 , H01M2220/20
摘要： A battery unit includes a battery cell, and a metal case in which a battery cell is stored, the metal case including a bottom surface, and a first side wall and a second side wall erected from a peripheral edge of the bottom surface and having inner surfaces opposing each other, in which the first side wall and the second side wall protrude further than an upper surface of the battery cell, and a distance between an inner surface of the first side wall and an inner surface of the second side wall is larger on an end side, which is an opposite side to a bottom surface side, than on the bottom surface side.

2. 发明公开

US20240047829A1 SECONDARY BATTERY 审中-公开
公开(公告)号：US20240047829A1
公开(公告)日：2024-02-08
申请号：US18380036
申请日：2023-10-13
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Takamasa ONO , Masaki KURATSUKA , Takashige FUJIKAWA , Takeo ASANUMA , Ami ONUMA , Kazuya MAYUMI , Masumi FUKUDA , Yosuke KONO , Atsushi OUKI , Ippei WAKI , Sho TAKAHASHI
IPC分类号： H01M50/489 , H01M10/0525 , H01M50/443 , H01M50/426 , H01M10/0569 , H01M4/525 , H01M50/105 , H01M50/131
CPC分类号： H01M50/489 , H01M10/0525 , H01M50/443 , H01M50/426 , H01M10/0569 , H01M4/525 , H01M50/105 , H01M50/131 , H01M2004/028
摘要： A secondary battery includes a positive electrode, a negative electrode, and a separator. The separator is interposed between the positive electrode and the negative electrode. The separator includes a porous layer, a first adhesion layer, and a second adhesion layer. The first adhesion layer is provided between the porous layer and the positive electrode, and is adhered to the positive electrode. The second adhesion layer is provided between the porous layer and the negative electrode, and is adhered to the negative electrode. After the separator is heated at a heating temperature of 130° C.±5° C. for a heating time of one hour, an adhesion strength of the first adhesion layer with respect to the positive electrode is larger than an adhesion strength of the first adhesion layer with respect to the porous layer, and an adhesion strength of the second adhesion layer with respect to the negative electrode is larger than an adhesion strength of the second adhesion layer with respect to the porous layer. After the separator is heated at a heating temperature of 130° C.±5° C. for a heating time of one hour, a softening temperature of the porous layer is lower than a softening temperature of the first adhesion layer, and is lower than a softening temperature of the second adhesion layer.

3. 发明申请

US20230058100A1 SECONDARY BATTERY 有权
公开(公告)号：US20230058100A1
公开(公告)日：2023-02-23
申请号：US17970287
申请日：2022-10-20
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Ami ONUMA , Atsushi OUKI , Masahiro MIYAMOTO , Takuju HASHIMOTO , Tomomi SAKUMA , Masaki KURATSUKA , Takashige FUJIKAWA , Ryuji SOEDA , Sho TAKAHASHI , Yoshihito AKIYAMA , Yosuke KONO , Takamasa ONO , Shoichi NISHIYAMA , Takeo ASANUMA , Shinji HAYAZAKI
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505 , H01M10/0569
摘要： A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes a lithium-nickel composite oxide of a layered rock-salt type.

4. 发明申请

US20190027783A1 NEGATIVE ELECTRODE FOR SECONDARY BATTERY, SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, POWER STORAGE SYSTEM, POWER TOOL, AND ELECTRONIC DEVICE 审中-公开
公开(公告)号：US20190027783A1
公开(公告)日：2019-01-24
申请号：US16116523
申请日：2018-08-29
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Tadashi MATSUSHITA , Mitsuhiro UE , Masaki KURATSUKA
IPC分类号： H01M10/0525 , H01M4/38 , H01M4/485 , H01M4/62 , H01M4/583
摘要： A secondary battery includes a negative electrode including a plurality of first negative electrode active material particles, second negative electrode active material particles, and a negative electrode binder. The first negative electrode active material particles include a carbon material, and the second negative electrode active material particles include a silicon material. The negative electrode binder includes polyvinylidene fluoride and at least a part of the negative electrode binder is provided on a part of the surface of each of the second negative electrode active material particles. A ratio M2/M1 of an abundance M2 of the negative electrode binder on the surface and in proximity to each of the second negative electrode active material particles to an abundance M1 of the negative electrode binder on the surface and in proximity to each of the first negative electrode active material particles is larger than 1.

5. 发明申请

US20210367230A1 POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, AND SECONDARY BATTERY 有权
公开(公告)号：US20210367230A1
公开(公告)日：2021-11-25
申请号：US17393502
申请日：2021-08-04
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Atsushi OUKI , Susumu ENDO , Shinji HAYAZAKI , Sho TAKAHASHI , Takashige FUJIKAWA , Masaki KURATSUKA
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M10/0525
摘要： A positive electrode active material for a secondary battery includes a center part and a covering part. The center part includes a layered rock-salt lithium-nickel composite oxide. The covering part covers a surface of the center part and includes a boron compound. The positive electrode active material has a crystallite size of a (104) plane that is greater than or equal to 40.0 nm and less than or equal to 74.5 nm. The crystallite size is calculated by X-ray diffractometry and Scherrer equation. The positive electrode active material has a specific surface area that satisfies a condition represented by −0.0160×Z+1.72≤A≤−0.0324×Z+2.94 where Z is the crystallite size (nm), and A is the specific surface area (m2/g). The specific surface area is measured by BET specific surface area measurement method.

6. 发明申请

US20180316054A1 NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE FOR SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY 审中-公开
公开(公告)号：US20180316054A1
公开(公告)日：2018-11-01
申请号：US15974890
申请日：2018-05-09
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Tadashi MATSUSHITA , Masaki KURATSUKA
IPC分类号： H01M10/0525 , H01M4/583 , H01M4/525 , H01M4/505 , H01M4/485 , H01M4/66 , H01M4/62 , H01M2/16 , H01M2/26 , H01M10/0587
摘要： A negative electrode active material includes a carbon material; a plurality of first particles including a first silicon oxide particle and a carbon layer and a plurality of second particles including a carbon particle and a second silicon oxide particle, and when a first mass of the first silicon oxide particle per gram of the negative electrode active material is referred to as M1 gram, and a second mass of the second silicon oxide particle per gram of the negative electrode active material is referred to as M2 grams, 0.40≤M1/(M1+M2)≤0.85 is satisfied, and when a first discharge capacity associated with the carbon material and the carbon particle is referred to as CpC, and a second discharge capacity associated with the first silicon oxide particle and the second silicon oxide particle is referred to as CpSO, 0.15≤CpSO/(CpC+CpSO)≤0.5 is satisfied

7. 发明申请

US20230137208A1 SECONDARY BATTERY 有权
公开(公告)号：US20230137208A1
公开(公告)日：2023-05-04
申请号：US18090947
申请日：2022-12-29
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Takatoshi MUNAOKA , Shinichi KATAYAMA , Atsushi OUKI , Masaki KURATSUKA , Takashige FUJIKAWA , Yousuke SHIMA
IPC分类号： H01M10/0569 , H01M4/525 , H01M4/485 , H01M10/0525
摘要： A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a lithium-nickel composite oxide. The negative electrode includes a lithium-titanium composite oxide. The electrolytic solution includes a carboxylic acid ester. The carboxylic acid ester includes at least one of ethyl acetate, propyl acetate, ethyl propionate, or propyl propionate. A first oxygen spectrum and a second oxygen spectrum are detectable by a surface analysis of the positive electrode by X-ray photoelectron spectroscopy. The first oxygen spectrum has a peak within a range of binding energy that is greater than or equal to 528 eV and less than or equal to 531 eV. The second oxygen spectrum has a peak within a range of binding energy that is greater than 531 eV and less than or equal to 535 eV. A ratio of an intensity of the first oxygen spectrum to an intensity of the second oxygen spectrum is greater than or equal to 0.30 and less than or equal to 0.80. A third oxygen spectrum and a fourth oxygen spectrum are detectable by a surface analysis of the negative electrode by the X-ray photoelectron spectroscopy. The third oxygen spectrum has a peak within a range of binding energy that is greater than or equal to 528 eV and less than or equal to 531 eV. The fourth oxygen spectrum has a peak within a range of binding energy that is greater than 531 eV and less than or equal to 535 eV. A ratio of an intensity of the third oxygen spectrum to an intensity of the fourth oxygen spectrum is greater than or equal to 0.82 and less than or equal to 1.35.

8. 发明申请

US20230053792A1 POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY 有权
公开(公告)号：US20230053792A1
公开(公告)日：2023-02-23
申请号：US17970312
申请日：2022-10-20
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Masumi FUKUDA , Atsushi OUKI , Atsushi NEMOTO , Takamasa ONO , Masaki KURATSUKA , Takashige FUJIKAWA , Ryuji SOEDA , Sho TAKAHASHI , Yoshihito AKIYAMA , Yosuke KONO , Shoichi NISHIYAMA , Takeo ASANUMA , Shinji HAYAZAKI
IPC分类号： H01M4/525 , H01M4/485 , H01M4/505 , H01M10/0568 , H01M10/0525
摘要： A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes a lithium-nickel composite oxide of a layered rock-salt type.

9. 发明申请

US20230052704A1 POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY 有权
公开(公告)号：US20230052704A1
公开(公告)日：2023-02-16
申请号：US17970030
申请日：2022-10-20
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Takamasa ONO , Atsushi OUKI , Masaki KURATSUKA , Takashige FUJIKAWA , Ryuji SOEDA , Sho TAKAHASHI , Yoshihito AKIYAMA , Yosuke KONO , Shoichi NISHIYAMA , Takeo ASANUMA , Shinji HAYAZAKI
IPC分类号： H01M4/525 , H01M4/505 , H01M50/105 , H01M50/136 , H01M10/0567 , H01M10/0525 , C01G53/00 , H01G11/50 , H01G11/58
摘要： A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes a lithium-nickel composite oxide of a layered rock-salt type.

10. 发明申请

US20180287202A1 POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, BATTERY, BATTERY PACK, ELECTRONIC DEVICE, ELECTRIC VEHICLE, POWER STORAGE DEVICE, AND POWER SYSTEM 审中-公开
公开(公告)号：US20180287202A1
公开(公告)日：2018-10-04
申请号：US15997934
申请日：2018-06-05
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Tadashi MATSUSHITA , Yuya AKIYAMA , Atsushi OUKI , Takashi SATO , Masaki KURATSUKA
IPC分类号： H01M10/0525 , H01M2/14 , H01M2/04 , H01M10/0587 , H01M4/583 , H01M4/38 , H01M4/36
CPC分类号： H01M10/0525 , H01M2/04 , H01M2/14 , H01M4/36 , H01M4/364 , H01M4/366 , H01M4/381 , H01M4/505 , H01M4/525 , H01M4/583 , H01M10/0587 , H01M2004/027 , H01M2004/028 , H01M2220/20 , Y02E60/122
摘要： A positive electrode includes first active material particles, second active material particles, and third active material particles, and the second active material particles include an aggregation of second primary particles. The average particle size D1 of the first active material particles, the average particle size D2 of the second active material particles, and the average particle size D3 of the third active material particles satisfy a relationship of D1>D2>D3. A first particle disintegration rate α1 of the first active material particle and a third particle disintegration rate α2 of the third active material particle are not more than 20%, and a second particle disintegration rate β of the second active material particle is not less than 70%.

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