Patents Assigned to Dongguan Amperex Electronics Technology Limited
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Patent number: 8440335Abstract: An explosion-proof device for use in power batteries includes a battery cover defining an explosion-proof hole, a valve seat securely mounted in the explosion-proof hole and hermetically sealing the battery cover, and a rupture film positioned in the valve seat and hermetically sealing the explosion-proof hole. The rupture film is insulatively isolated from the valve seat via an insulative cushion enclosing the rupture film, or an insulative layer formed on the rupture film. In the explosion-proof device of the prevent invention, the rupture film is insulatively isolated from the valve seat, which can prevent the rupture film from being electrochemically corroded.Type: GrantFiled: January 18, 2011Date of Patent: May 14, 2013Assignee: Dongguan Amperex Electronics Technology LimitedInventors: Peng Wang, Ping-hua Deng, Biao Jin, Zhi-jun Guo
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Patent number: 8404372Abstract: A safety device for use in a lithium ion battery includes a top cover defining a central hole and a number of peripheral holes set around the central hole, a rupture plate fixed to the bottom surface of the top cover and sealing the peripheral holes and the central hole, and a vent plate defining an air hole electrically connected to the rupture plate via an electrical connection point. Other part of the rupture plate is electrically insulated from the vent plate via an insulating gasket. The central hole and the peripheral holes around the central hole can prevent the deformed rupture plate from blocking the air vent passage of the lithium ion battery to improve the safety performance of the lithium ion battery.Type: GrantFiled: July 22, 2010Date of Patent: March 26, 2013Assignees: Dongguan Amperex Technology Limited, Dongguan Amperex Electronics Technology LimitedInventor: Yi Hua Pei
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Publication number: 20120251877Abstract: A secondary lithium ion battery includes an anode electrode having an anode current collector and an anode active material formed on the anode current collector, a cathode electrode having a cathode current collector and a cathode active material formed on the cathode current collector; a separator interposed between the anode electrode and the cathode electrode, and a nonaqueous liquid electrolyte. The anode active material contains lithium titanate and amorphous carbon. The hybrid anode electrode containing lithium titanate and amorphous carbon of the secondary lithium ion battery according to the present invention can reduce swelling of the secondary lithium ion battery during storage or cycle and prolong life span of the secondary lithium ion battery.Type: ApplicationFiled: March 28, 2012Publication date: October 4, 2012Applicants: Dongguan Amperex Electronics Technology Limited, Dongguan Amperex Technology LimitedInventors: Kai WU, Yao ZHANG, Wan-hao YAO
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Publication number: 20110052948Abstract: The present invention provides a cell cap assembly including a grommet defining a through hole, a stripper contact plate defining at least one gas hole securely received in the through hole, an rupture plate securely positioned in the through hole and in electrical connection with the stripper contact plate, and an end cap electrically connected with the rupture plate. The rupture plate includes an outer ring portion, a bent portion extending from the outer ring portion, and a planar recessed portion defining a recess formed at one end of the bent portion.Type: ApplicationFiled: September 28, 2009Publication date: March 3, 2011Applicants: Dongguan Amperex Electronics Technology Limited, Dongguan Amperex Technology LimitedInventor: Yi-hua Pei
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Publication number: 20100330402Abstract: A cap assembly with desirable safety performance for use in lithium ion batteries, includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate defining an air hole electrically connected with the rupture plate, a current interrupt device disposed on the rupture plate, and an end cap defining an air exhaust hole assembled on the current interrupt device. The current interrupt device has an upper conductive plate electrically connected with the end cap, a lower conductive plate electrically connected with the rupture plate, and a fuse electrically connecting the upper conductive plate and the lower conductive plate. When the current intensity in the lithium ion battery exceeds a predetermined value, the fuse melts to cut off the current path.Type: ApplicationFiled: June 21, 2010Publication date: December 30, 2010Applicants: DONGGUAN AMPEREX TECHNOLOGY LIMITED, DONGGUAN AMPEREX ELECTRONICS TECHNOLOGY LIMITEDInventors: Peng Wang, Feng-gang Zhao, Wei Chen
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Publication number: 20100291422Abstract: Provided is a cap assembly for use in cylindrical lithium ion batteries. The cap assembly includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate soldered on and electrically connected to the rupture plate, a current interrupt device positioned on the rupture plate, and an end cap assembled on the current interrupt device. The current interrupt device can cut off the current path when the battery discharges at a high discharge rate, so as to improve the safety performance of the lithium ion battery.Type: ApplicationFiled: May 11, 2010Publication date: November 18, 2010Applicants: Dongguan Amperex Technology Limited, Dongguan Amperex Electronics Technology LimitedInventors: Ping-hua Deng, Kai Wu, Wei Chen
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Publication number: 20100173205Abstract: An electrode group is configured for use in a lithium ion battery. The electrode group includes an anode plate and a cathode plate wound with a separator interposed therebetween. At least one metal oxide layer is disposed between the anode plate and the cathode plate. The metal oxide layer is provided at two length edges of the anode plate and/or the cathode plate, corresponding to the cutting edge of the cathode current collector where the cut burr formed in cutting process. Even though the cut burrs can pierce through the separator, the cut burrs still cannot contact the anode film. Any internal circuit short, caused by contact between the aluminum foil and the anode film, may therefore be avoided and, therefore, the performance of the lithium ion battery is remarkably improved.Type: ApplicationFiled: December 17, 2009Publication date: July 8, 2010Applicants: Dongguan Amperex Electronics Technology Limited, Dongguan Amperex Technology LimitedInventors: Yu-qun Zeng, Yue-li Wang, Kun Liu, Jian Tu, Kai Wu