Patents Assigned to NingDe Contemporary Amperex Technology Limited
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Patent number: 10027134Abstract: The present application relates to an active equalization method and system of a lithium iron phosphate (LFP) battery pack.Type: GrantFiled: February 4, 2016Date of Patent: July 17, 2018Assignees: Qinghai Contemporary Amperex Technology Limited, Ningde Contemporary Amperex Technology LimitedInventors: Jingyao Mei, Jianguo Hu, Shilin Huang
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Patent number: 10008744Abstract: A lithium ion battery electrolyte, comprises lithium salt, a non-aqueous organic solvent and additives. The additives comprise an SEI film forming additive and furil and derivatives thereof, and the SEI film forming additive is at least one of vinylene carbonate, fluoroethylene carbonate and vinyl ethylene carbonate. Compared with the prior art, furil and derivatives thereof are added to the electrolyte as electrolyte additives in the present invention, to enhance the permeability for separator and the wettability for positive/negative electrode materials, facilitate the film forming reaction of the SEI film forming additive, and further improve the cycling performance of the lithium ion battery using the electrolyte. Furthermore, the furil and derivatives thereof have good chemical and electrochemical stability and free from decomposition reaction within the operating voltage range of the lithium ion battery, thereby imparting no negative effect upon battery performances.Type: GrantFiled: March 19, 2014Date of Patent: June 26, 2018Assignee: NingDe Contemporary Amperex Technology LimitedInventors: Shilin Huang, Kefei Wang, Chenghua Fu
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Patent number: 9698516Abstract: One aspect of the present disclosure is directed to a connector. The connector includes a top cover, a connecting plate, and a base. The top cover includes a top cover body and a first arc member. A first end of the first arc member is arranged on a side surface of the top cover body. A removable thin plate is arranged inside the first arc member. The connecting plate includes a connection section and a protruding section. The top cover body and the base are engaged and connected to form a cavity. The connection section is arranged inside the cavity. The connection section is connected to the base. A first end of the protruding section is connected to the connection section and a second end of the protruding section protrudes from the base.Type: GrantFiled: February 1, 2016Date of Patent: July 4, 2017Assignee: NINGDE CONTEMPORARY AMPEREX TECHNOLOGY LIMITEDInventors: Huang Yincheng, Xiang Yanhuo
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Publication number: 20170033354Abstract: The present application provides a positive electrode material, a method for preparing the same and a Li-ion battery containing the positive electrode material, wherein, the positive electrode material is represented as Li1+xNiaCobMncMdO2, in which M is selected from one or more of Mg, Ti, Zn, Zr, Al and Nb. The positive electrode material provided by the present application has a small crystal volume and a small Li—Ni synchysis degree. In addition, after the positive electrode material provided by the present application is applied to a Li-ion battery, the Li-ion battery possesses a better cycle performance, a higher initial charge-discharge efficiency and a better power property. Moreover, in the present application, a precursor is prepared by a coprecipitation method, and then the precursor is sintered together with a Li source and a metal oxide to obtain the positive electrode material.Type: ApplicationFiled: September 29, 2015Publication date: February 2, 2017Applicant: Ningde Contemporary Amperex Technology LimitedInventors: Dingshan RUAN, Miaomiao REN, Xuguang GAO, Qifeng LI, Na LIU, Yongshou LIN
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Publication number: 20170025665Abstract: A power battery cap structure and a power battery are provided in the present invention. The power battery cap structure includes a first terminal, a second terminal and a cap assembly; both the first terminal and the second terminal are provided on the cap assembly, and the second terminal is electrically insulated from the cap assembly. The power battery cap structure further includes a resistance attached to the first terminal and electrically connected the first terminal with the cap assembly. The cap assembly includes a cap sheet, a first short circuit part and a second short circuit part; the first short circuit part and the second short circuit part are attached to the cap sheet and configured to act upwards when pressure inside the power battery increases so that the first terminal and the second terminal are electrically connected to form a protection loop; and the first short circuit part and the resistance are connected in parallel when the protection loop is formed.Type: ApplicationFiled: September 1, 2015Publication date: January 26, 2017Applicant: Ningde Contemporary Amperex Technology LimitedInventors: Quankun Li, Kai Wu, Pinghua Deng, Xiaobo Chen
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Publication number: 20160233696Abstract: The present application relates to an active equalization method and system of a lithium iron phosphate (LFP) battery pack.Type: ApplicationFiled: February 4, 2016Publication date: August 11, 2016Applicants: Qinghai Contemporary Amperex Technology Limited, Ningde Contemporary Amperex Technology LimitedInventors: Jingyao MEI, Jianguo HU, Shilin HUANG
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Publication number: 20160190829Abstract: The invention discloses a passive equalization method for a lithium iron phosphate battery pack, comprising: determining a voltage range in which a State of Charge can be accurately queried for a cell in the battery pack, and determining a corresponding relation between a voltage at which a State of Charge can be accurately queried and the State of Charge; collecting an open circuit voltage of each cell in a quiescent state; judging whether the open circuit voltage is within the voltage range in which a State of Charge can be accurately queried; if the open circuit voltage is within the voltage range in which a State of Charge can be accurately queried, acquiring the State of Charge of the cell corresponding to the open circuit voltage according to the open circuit voltage and the corresponding relation between a voltage at which a State of Charge can be accurately queried and the State of Charge, and determining equalizing capacity of each cell according to the State of Charge of each cell; calculating equalType: ApplicationFiled: December 24, 2015Publication date: June 30, 2016Applicant: Ningde Contemporary Amperex Technology LimitedInventors: Jingyao MEI, Jianguo HU, Shilin HUANG
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Patent number: 9281580Abstract: One aspect of the present disclosure is directed to a connector. The connector includes a top cover, a connecting plate, and a base. The top cover includes a top cover body and a first arc member. A first end of the first arc member is arranged on a side surface of the top cover body. A removable thin plate is arranged inside the first arc member. The connecting plate includes a connection section and a protruding section. The top cover body and the base are engaged and connected to form a cavity. The connection section is arranged inside the cavity. The connection section is connected to the base. A first end of the protruding section is connected to the connection section and a second end of the protruding section protrudes from the base.Type: GrantFiled: January 15, 2015Date of Patent: March 8, 2016Assignee: Ningde Contemporary Amperex Technology LimitedInventors: Huang Yincheng, Xiang Yanhuo
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Publication number: 20150104672Abstract: This invention belongs to the lithium-ion battery field, and in particular, to a safety device of a lithium-ion battery. The safety device of a lithium-ion battery comprises a top cover plate, a first electrode post, a second electrode post, an explosion-proof valve, and a conductive plate, wherein the first electrode post, the second electrode post, and the explosion-proof valve are respectively positioned on the top cover plate; the first electrode post is electrically connected to the top cover plate; the second electrode post is assembled in an insulated way to the top cover plate; and the second electrode post is electrically connected to the conductive plate; where an air-pressured flip plate is further positioned on the top cover plate, and a cut is positioned on the air-pressured flip plate.Type: ApplicationFiled: October 16, 2013Publication date: April 16, 2015Applicant: NingDe Contemporary Amperex Technology LimitedInventors: Rulai Cai, Qiong Qu, Quankun Li, Peng Wang, Pinghua Deng
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Publication number: 20150091529Abstract: A pre-charging and pre-discharging device includes: a charging-discharging device, a master control cabinet, a master switch device, a terminal box device and a test component, wherein the master control cabinet is connected with the energy storage system, the master switch device is connected with the charging-discharging device through a cable and the master switch device is further connected with the master control cabinet, the terminal box device is connected with the master control cabinet, the test component is connected with the energy storage system and the test component is further connected with the terminal box device through a cable.Type: ApplicationFiled: March 19, 2014Publication date: April 2, 2015Applicant: NingDe Contemporary Amperex Technology LimitedInventors: Shengguo HUANG, Shilin HUANG
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Publication number: 20150056500Abstract: A lithium ion battery electrolyte, comprises lithium salt, a non-aqueous organic solvent and additives. The additives comprise an SEI film forming additive and furil and derivatives thereof, and the SEI film forming additive is at least one of vinylene carbonate, fluoroethylene carbonate and vinyl ethylene carbonate. Compared with the prior art, furil and derivatives thereof are added to the electrolyte as electrolyte additives in the present invention, to enhance the permeability for separator and the wettability for positive/negative electrode materials, facilitate the film forming reaction of the SEI film forming additive, and further improve the cycling performance of the lithium ion battery using the electrolyte. Furthermore, the furil and derivatives thereof have good chemical and electrochemical stability and free from decomposition reaction within the operating voltage range of the lithium ion battery, thereby imparting no negative effect upon battery performances.Type: ApplicationFiled: March 19, 2014Publication date: February 26, 2015Applicant: NingDe Contemporary Amperex Technology LimitedInventors: Shilin HUANG, Kefei WANG, Chenghua FU
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Publication number: 20140302359Abstract: The present disclosure provides a lithium-ion battery and a deformable safety valve as an overcharge protection device thereof. The deformable safety valve as the overcharge protection device of the lithium-ion battery comprises a short-circuit conductive plate and a deformable plate made from aluminum, a facing surface of the deformable plate being coated with a metal layer to reduce contact resistance between the deformable plate and the short-circuit conductive plate. The lithium-ion battery comprises a first electrode post; a cap plate electrically connected to the first electrode post; an electrolyte-injection hole provided in the cap plate; a vent provided in the cap plate; a deformable safety valve provided to the cap plate; and a second electrode post assembled to the cap plate in an insulating manner; wherein the deformable safety valve is the above deformable safety valve as the overcharge protection device of the lithium-ion battery.Type: ApplicationFiled: April 2, 2014Publication date: October 9, 2014Applicant: Ningde Contemporary Amperex Technology LimitedInventors: Shilin HUANG, Junzhong HU, Pinghua DENG
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Publication number: 20140113183Abstract: A lithium-ion battery includes a safety protection bracket. The battery includes an electrode assembly and an aluminum housing for receiving the electrode assembly, wherein the electrode assembly comprises a cathode, an anode, and a separator film, a cathode tab is positioned on the cathode, an anode tab is positioned on the anode, a safety bracket is positioned on the top of the electrode assembly, and the safety bracket is located between the aluminum housing and the electrode assembly, and an aluminum top cover fixedly connected to the aluminum housing is positioned on the aluminum housing. The battery provides a safety protection unit deployed on the bracket can fix the electrode assembly, and in addition, when the battery is punctured or crushed or otherwise misused, release energy of a faulty cell through an outer short-circuit to avoid greater accidents and ensure safety performance of the battery.Type: ApplicationFiled: October 16, 2013Publication date: April 24, 2014Applicant: NingDe Contemporary Amperex Technology LimitedInventors: Quankun Li, Pinghua Deng, Peng Wang, Kai Wu, Heng Zhang
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Publication number: 20140038001Abstract: The invention pertains to the technical field of a power battery, in particular to a power battery safety cover, comprising a cover plate, and a first terminal, a second terminal, a pressure release valve, a filling hole and a safety turning valve which are arranged on the cover plate, wherein the safety turning valve is electrically connected to the cover plate, on the cover plate is provided with a conducting plate for short-circuit protection which is electrically connected to the second terminal; the conducting plate for short-circuit protection, positioned above the safety turning valve, comprises a conducting plate main body and a first groove arranged on the conducting plate main body, and thickness of bottom of the first groove is less than that of the safety turning valve.Type: ApplicationFiled: July 30, 2013Publication date: February 6, 2014Applicant: NingDe Contemporary Amperex Technology LimitedInventors: Rulai Cai, Pinghua Deng, Peng Wang, Quankun Li, Kai Wu