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公开(公告)号：US20240322352A1
公开(公告)日：2024-09-26
申请号：US18271760
申请日：2022-01-14
发明人： Keisuke Yamashita
IPC分类号： H01M50/342 , H01M50/107 , H01M50/152 , H01M50/167 , H01M50/184
CPC分类号： H01M50/3425 , H01M50/107 , H01M50/152 , H01M50/167 , H01M50/184
摘要： A seal plate of a cylindrical battery has an outer peripheral portion, which is at least partly fixed to an opening of an outer can, and an annular thin portion adjacent to the outer peripheral portion. The thin portion has a sloping portion sloping radially inward toward the bottom of the outer can in an axial direction. In a cross section of the thin portion taken in a plane including the radial direction and the axial direction, an inner surface of an adjacent portion adjacent to the outer peripheral portion of the thin portion has a curved shape, and the gradient of an outer surface of the thin portion changes towards the outer peripheral portion so as to decrease the thickness of the adjacent portion.
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公开(公告)号：US20240304958A1
公开(公告)日：2024-09-12
申请号：US18573563
申请日：2022-06-10
发明人： Suguru Matsumura , Oose Okutani
IPC分类号： H01M50/538 , H01M10/0587 , H01M50/536
CPC分类号： H01M50/538 , H01M10/0587 , H01M50/536
摘要： A cylindrical battery comprises: a wound electrode body having a hollow section extending in the axial direction; and collector plates, each collector plate including a protrusion having an apex accommodated in the hollow section, and a groove part provided integrally with the protrusion on the outside in the radial direction of the protrusion so as to define a groove, the collector plates being more toward the outside in the axial direction than the electrode body. In a core body of at least one of a positive and a negative electrode, a core body exposed portion without a mixture layer is joined to a core body Joining portion (an upper surface of a ridge part, and a lower surface of a ridge part of the collector plate. The core body joining portion includes an opposing part that radially opposes an integral structure comprising the protrusion and the groove part.
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公开(公告)号：US20240297293A1
公开(公告)日：2024-09-05
申请号：US18273911
申请日：2022-02-02
发明人： Miho Komori , Kei Kobayashi , Takafumi Sakida
CPC分类号： H01M4/134 , H01M2004/021 , H01M2004/027 , H01M2004/028
摘要： A nonaqueous electrolyte secondary battery according to one embodiment of the present invention is provided with: a positive electrode which comprises a positive electrode core body and a positive electrode mixture layer that is provided on the positive electrode core body; and a negative electrode which comprises a negative electrode core body and a negative electrode mixture layer that is provided on the negative electrode core body. The 0.2 percent proof stress of the positive electrode core body is larger than the 0.2 percent proof stress of the negative electrode core body. It is preferable that the 0.2 percent proof stress of the positive electrode core body is not less than 1.05 times the 0.2 percent proof stress of the negative electrode core body.
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公开(公告)号：US20240186487A1
公开(公告)日：2024-06-06
申请号：US18554346
申请日：2022-04-06
发明人： Kyohei Sakamoto
CPC分类号： H01M4/364 , B82Y30/00 , H01M4/386 , H01M4/583 , H01M2004/027
摘要： Provided is a non-aqueous electrolyte secondary battery that has improved cycle characteristics. According to one aspect of the present disclosure, a non-aqueous electrolyte secondary battery comprises: an electrode body that includes a positive electrode and a negative electrode; and a packaging body that houses the electrode body and a non-aqueous electrolyte. The negative electrode includes a negative electrode collector and a negative electrode mixture layer that is formed on the surface of the negative electrode collector. The negative electrode mixture layer contains: a negative electrode active material that includes a carbon-based active material and a silicon-based active material; and carbon nanotubes. The G/D ratio obtained by Raman spectroscopy of the carbon nanotubes is 40-130.
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公开(公告)号：US20240162443A1
公开(公告)日：2024-05-16
申请号：US18281080
申请日：2022-03-10
CPC分类号： H01M4/623 , H01M4/139 , H01M2004/021 , H01M2004/028
摘要： The present invention provides a positive electrode for nonaqueous electrolyte secondary batteries, the positive electrode having improved adhesion, while suppressing variation in battery characteristics. A positive electrode for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure comprises a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector; the positive electrode mixture layer contains a positive electrode active material, a conductive agent and a binder; the weight average molecular weight of the binder is 1,300,000 or more; and D10 and D90 in the particle size distribution of the binder satisfy (D90-D10)≥100 μm.
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公开(公告)号：US20240145815A1
公开(公告)日：2024-05-02
申请号：US18548893
申请日：2022-03-07
发明人： SHINSUKE FUKUDA
IPC分类号： H01M10/6551 , H01M10/613 , H01M10/643 , H01M50/224
CPC分类号： H01M10/6551 , H01M10/613 , H01M10/643 , H01M50/224 , H01M2220/20
摘要： Thermal energy of batteries is efficiently dissipated to outside, achieving high safety. A battery pack includes a core block (10) including battery cells disposed at predetermined positions in a battery holder (2) and a casing accommodating the core block (10) therein. The casing includes a heat-dissipating case (4) having both end-openings and closing parts closing the both end-openings of the heat-dissipating case (4). The heat-dissipating case (4) includes a tubular part (6) and heat-absorbing fins (7). The tubular part (6) has a tubular shape made of metal, and accommodates the core block therein. The heat-absorbing fins (7) disposed in rows are made of metal and thermally coupled to the inner surface of the tubular part (6), and protrude to an inside from the tubular part and extend in an axial direction of the tubular part (6).
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公开(公告)号：US20240145709A1
公开(公告)日：2024-05-02
申请号：US18272187
申请日：2022-01-14
发明人： Isao Koizumi , Yasunobu Iwami , Shigeki Moriya
CPC分类号： H01M4/5825 , H01M4/0471 , H01M4/364 , H01M4/386 , H01M4/583 , H01M4/622 , H01M10/052 , H01M2004/021 , H01M2004/027
摘要： A negative electrode active material composite particle according to one embodiment is a composite particle for a negative electrode active material, the composite particle including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and a resin-calcined material. The resin-calcined material containing at least one element selected from F and N. The composite particle has a porosity of 10% or less, for example, and the content of the resin-calcined material is 1-20% by mass with respect to the mass of the composite particle.
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公开(公告)号：US20240136808A1
公开(公告)日：2024-04-25
申请号：US18546954
申请日：2022-02-22
发明人： KEITARO TANIGUCHI , JUNPEI ITO , ATSUSHI SUYAMA
CPC分类号： H02H7/18 , H01H9/54 , H01H37/761 , H01M10/48 , H02J7/00302 , H02J7/0031
摘要： A fuse element of a SCP is reliably fusion-cut with a simple circuit configuration to interrupt an electric current. In a power supply equipped with a battery unit, a control circuit (7) is configured to control turning on and off of a switch (6) configured to connect the SCP (3) which is connected in series to a battery unit (1) and is configured to interrupt charge and discharge currents in an abnormal state. Battery unit 1 includes battery cells (2) connected in series to one another. The SCP (3) includes fuse element 4 connected in series to an output end of the battery unit (1), and a heater (5) configured to fusion-cut the fuse element (4). The switch (6) includes switching elements (10) each of which has one terminal connected to the heater (5) and another terminal connected to a corresponding one of different-voltage terminals (11) of the battery unit 1. In control circuit (7), a selection circuit (9) is configured to select, according to the voltage detected by the voltage detection circuit (8), a switching element (10) to be turned on, and the switching element (10) which is turned on connects the battery unit (1) to the heater (5) to fusion-cut the fuse element (4).
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公开(公告)号：US20240120604A1
公开(公告)日：2024-04-11
申请号：US18264588
申请日：2022-02-25
IPC分类号： H01M50/291 , H01M10/643 , H01M10/653 , H01M10/6554 , H01M50/213 , H01M50/293 , H01M50/367 , H01M50/503 , H01M50/522
CPC分类号： H01M50/291 , H01M10/643 , H01M10/653 , H01M10/6554 , H01M50/213 , H01M50/293 , H01M50/367 , H01M50/503 , H01M50/522 , H01M2200/20
摘要： A power supply device with enhanced safety is provided. A power supply device (100) includes secondary battery cells (1) each including a positive electrode (2) including a safety valve on one end surface of each cell, a battery holder holding the secondary battery cells (1) each including the positive electrode (2) on the one end surface thereof, and a housing (20) having a bottom surface (22), a top surface (23), and an inner space which accommodates the battery holder therein. The battery holder holds the secondary battery cells (1) upright in parallel to one another such that the positive electrode (2) on the one end surface of each cell (1) is directed vertically downward. In the housing (20), the battery holder retains the positive electrode (2) of each cell (1) spaced apart from the bottom surface (22) across a first space (SP1). In the above structure, the first space (SP1) between the positive electrode (2) of the secondary battery cell (1) and the bottom surface (22) is used as a space for discharging gas when the gas is discharged from the safety valve. In addition, when the power supply device (100) is submerged or exposed to water, the first space (SP1) keeps the positive electrode (2) spaced apart from the bottom surface (22) where water tends to accumulate, thereby enhancing safety.
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公开(公告)号：US20240120553A1
公开(公告)日：2024-04-11
申请号：US18273427
申请日：2022-01-21
IPC分类号： H01M10/0587 , H01M4/38 , H01M4/583 , H01M4/62
CPC分类号： H01M10/0587 , H01M4/386 , H01M4/583 , H01M4/625 , H01M2004/027
摘要： Provided is a non-aqueous electrolyte secondary, rile non-aqueous electrolyte secondary battery according to one mode of the present disclosure comprises an electrode body in Which a band-form positive electrode and a band-forth negative electrode are wound with a separator interposed therebetween, an electrolytic liquid, and an exterior body that accommodates the electrode body and the electrolytic liquid. The negative electrode has a negative electrode current collector, and a negative electrode mixture layer that is formed on the surface of the negative electrode current collector and that contains a negative electrode active material and an electroconductive agent. In the negative electrode mixture layer, the electroconductive agent content in a winding outer end is greater than the electroconductive agent content in a winding inner end, the negative electrode mixture layer having a region in which the electroconductive agent content continuously increases from the winding-inner-end side to the winding-outer-end side.
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