Patents by Inventor Changming Qu
Changming Qu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250023094Abstract: A negative electrode active material of the electrochemical apparatus includes a first active material and a second active material; where a gram capacity of the first active material is less than that of the second active material; a discharge operating voltage range of the first active material includes a first voltage range that is not greater than an upper limit of a discharge operating voltage of the second active material; the electrochemical apparatus operates at a first discharge cut-off voltage and a first charge cut-off voltage during a first time period; the electrochemical apparatus operates at a second discharge cut-off voltage and a second charge cut-off voltage during a second time period; and the first discharge cut-off voltage and the second discharge cut-off voltage are both within the first voltage range.Type: ApplicationFiled: September 30, 2024Publication date: January 16, 2025Applicant: Ningde Amperex Technology LimitedInventors: Bangkun ZOU, Changming QU
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Publication number: 20240313277Abstract: An electronic apparatus, and a storage medium. The electrochemical apparatus control method includes steps (a) and (b): (a) when an internal resistance change rate of the electrochemical apparatus is smaller than a first threshold, performing charging/discharging at a first voltage and a second voltage; and (b) when the internal resistance change rate of the electrochemical apparatus is greater than or equal to the first threshold, raising a discharge cut-off voltage of the electrochemical apparatus by a first raising amount. The internal resistance change rate of the electrochemical apparatus is monitored and the electrochemical apparatus is controlled based on the internal resistance change rate. This improves the cycling performance of the electrochemical apparatus while guaranteeing high energy density of the electrochemical apparatus.Type: ApplicationFiled: May 24, 2024Publication date: September 19, 2024Applicant: Ningde Amperex Technology LimitedInventors: Bangkun ZOU, Changming QU, Fan YANG
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Publication number: 20240297339Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: ApplicationFiled: May 13, 2024Publication date: September 5, 2024Applicant: Ningde Amperex Technology LimitedInventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
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Patent number: 12015118Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: GrantFiled: March 29, 2022Date of Patent: June 18, 2024Assignee: Ningde Amperex Technology LimitedInventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
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Patent number: 11929483Abstract: The present application provides a positive electrode and a lithium-ion battery. The positive electrode comprises a current collector; a first active material layer comprising a first active material; and a second active material layer; wherein the first active material layer is arranged between the current collector and the second active material layer, the first active material layer comprises a first active material, and the first active material is at least one selected from a group consisting of a modified lithium transition metal oxide positive electrode material and a modified lithium iron phosphate. The positive electrode of the present application helps to improve the thermal stability of the lithium-ion battery, and the improvement of the thermal stability may reduce the proportion of the thermal runaway when the lithium-ion battery is internally short-circuited so that the safety performance of the lithium-ion battery is improved.Type: GrantFiled: October 24, 2018Date of Patent: March 12, 2024Assignee: Ningde Amperex Technology LimitedInventors: Xiaozhen Zhang, Fan Yang, Changming Qu, Yisong Su, Chaowang Lin, Huawei Zhong
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Patent number: 11664528Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: GrantFiled: March 29, 2022Date of Patent: May 30, 2023Assignee: Ningde Amperex Technology LimitedInventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
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Publication number: 20220223902Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: ApplicationFiled: March 29, 2022Publication date: July 14, 2022Applicant: Ningde Amperex Technology LimitedInventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
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Publication number: 20220223903Abstract: An electrode includes a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: ApplicationFiled: March 29, 2022Publication date: July 14, 2022Applicant: Ningde Amperex Technology LimitedInventors: Chaowang LIN, Fan YANG, Yisong SU, Huawei ZHONG, Changming QU, Xiaozhen ZHANG
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Patent number: 11322774Abstract: The present application provides an electrode, an electrochemical device, and an electronic device. The electrode includes: a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: GrantFiled: May 7, 2020Date of Patent: May 3, 2022Assignee: Ningde Amperex Technology LimitedInventors: Chaowang Lin, Fan Yang, YiSong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
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Publication number: 20200266483Abstract: The present application provides an electrode, an electrochemical device, and an electronic device. The electrode includes: a current collector; a first active material layer including a first active material; and a second active material layer including a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on a surface of the current collector, and a particle size of 90% accumulative volume of the first active material is less than 40 ?m. The active material layer is used in the present application to ensure that the electrochemical device and the electronic device do not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the electrochemical device and the electronic device.Type: ApplicationFiled: May 7, 2020Publication date: August 20, 2020Inventors: Chaowang Lin, Fan Yang, YiSong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
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Patent number: 10693181Abstract: The present application provides an electrode and a lithium-ion battery. The electrode comprises: a current collector; a first active material layer comprising a first active material; and a second active material layer comprising a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on at least one surface of the current collector, and a ratio of an average particle size of the second active material to an average particle size of the first active material is from 1:1 to 40:1. The active material layer is used in the present application to ensure that the lithium-ion battery does not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the lithium-ion battery.Type: GrantFiled: June 5, 2018Date of Patent: June 23, 2020Assignee: Ningde Amperex Technology LimitedInventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang
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Publication number: 20190267612Abstract: The present application provides a positive electrode and a lithium-ion battery. The positive electrode comprises a current collector; a first active material layer comprising a first active material; and a second active material layer; wherein the first active material layer is arranged between the current collector and the second active material layer, the first active material layer comprises a first active material, and the first active material is at least one selected from a group consisting of a modified lithium transition metal oxide positive electrode material and a modified lithium iron phosphate. The positive electrode of the present application helps to improve the thermal stability of the lithium-ion battery, and the improvement of the thermal stability may reduce the proportion of the thermal runaway when the lithium-ion battery is internally short-circuited so that the safety performance of the lithium-ion battery is improved.Type: ApplicationFiled: October 24, 2018Publication date: August 29, 2019Inventors: Xiaozhen Zhang, Fan Yang, Changming Qu, Yisong Su, Chaowang Lin, Huawei Zhong
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Publication number: 20190267664Abstract: The present application provides an electrode and a lithium-ion battery. The electrode comprises: a current collector; a first active material layer comprising a first active material; and a second active material layer comprising a second active material; wherein the first active material layer is arranged between the current collector and the second active material layer. The first active material layer is formed on at least one surface of the current collector, and a ratio of an average particle size of the second active material to an average particle size of the first active material is from 1:1 to 40:1. The active material layer is used in the present application to ensure that the lithium-ion battery does not generate a short circuit when pressed by an external force, thereby ensuring the mechanical safety performance of the lithium-ion battery.Type: ApplicationFiled: June 5, 2018Publication date: August 29, 2019Inventors: Chaowang Lin, Fan Yang, Yisong Su, Huawei Zhong, Changming Qu, Xiaozhen Zhang