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1. 发明公开

EP3806196A1 NEGATIVE ELECTRODE TAB AND SECONDARY BATTERY 无效
公开(公告)号：EP3806196A1
公开(公告)日：2021-04-14
申请号：EP19854601.2
申请日：2019-03-01
申请人： Contemporary Amperex Technology Co., Limited
发明人： HUANG, Yaping , GUO, Mingkui , WANG, Yaohui , LIN, Yongshou , ZHAO, Fenggang
IPC分类号： H01M4/13
摘要： The present invention relates to the electrochemical field, and in particular, to a negative electrode plate and a secondary battery including the electrode plate. The present invention provides a negative electrode plate. The negative electrode plate includes a negative electrode current collector, a first negative electrode active substance layer disposed on at least one surface of the negative electrode current collector, and a second negative electrode active substance layer disposed on the first negative electrode active substance layer. The first negative electrode active substance layer includes a first negative electrode active substance, and the second negative electrode active substance layer includes a second negative electrode active substance. The first negative electrode active substance satisfies 1 GPa ≤ Young's modulus ≤ 10 GPa, and the second negative electrode active substance satisfies 11 GPa ≤ Young's modulus ≤ 30 GPa. The inventor of the present invention provides a new negative electrode plate, an upper layer of which is formed with a negative electrode active substance layer formed by a specific proportion of negative electrode active substance with high Young's modulus. This can effectively increase battery cell energy density, and reduce costs.

2. 发明公开

EP4354636A1 BATTERY CELL AND BATTERY PACK 审中-实审
公开(公告)号：EP4354636A1
公开(公告)日：2024-04-17
申请号：EP22900314.0
申请日：2022-11-21
申请人： Contemporary Amperex Technology Co., Limited
发明人： XIAO, Haihe , ZHANG, Xiaowen , LI, Baiqing , HUANG, Yaping , PENG, Shuangjuan , JIN, Haizu
IPC分类号： H01M50/51 , H01M50/531 , H01M10/04
CPC分类号： Y02P70/50 , Y02E60/10 , H01M50/51 , H01M10/04 , H01M50/531
摘要： Disclosed in the present application are a battery cell and a battery pack. The battery cell comprises a shell and a bare cell, which is located in an inner cavity of the shell, wherein the bare cell at least has two opposite extension ends and a middle region, which is located between the two opposite extension ends of the bare cell; and the two opposite extension ends of the bare cell are configured to be lower than the middle region of the bare cell in a height direction. Since the bare cell of the battery cell forms a structure in which the middle is high and the edge is low, an electrolyte level in the shell is located below the middle region of the bare cell and above the extension ends thereof, such that an electrolyte for being drawn into a gap between electrode sheets can be provided while a space for accommodating gas is reserved in the shell, so as to reduce the probability of lithium precipitation, thereby ensuring the performance of a battery.

3. 发明公开

EP4254587A1 ELECTRODE SHEET, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, ELECTRIC APPARATUS, AND MANUFACTURING METHODS 审中-实审
公开(公告)号：EP4254587A1
公开(公告)日：2023-10-04
申请号：EP21965019.9
申请日：2021-11-23
申请人： Contemporary Amperex Technology Co., Limited
发明人： XIAO, Haihe , ZHANG, Xiaowen , PENG, Shuangjuan , HUANG, Yaping , LIU, Qiang , LI, Baiqing , JIN, Haizu
IPC分类号： H01M10/0583 , H01M10/0525
摘要： The present application relates to the technical field of batteries, and in particular to an electrode plate, an electrode assembly, a battery cell, a battery, a power consuming device, and manufacturing methods. The electrode plate is provided with a folding guide portion, the folding guide portion guiding the folding of the electrode plate. On this basis, the electrode plate can be folded and then stacked without the need for one-by-one stacking, and can be folded quickly under the guidance of the folding guide portion during folding, so the production efficiency of a stacked battery can be effectively improved.

4. 发明公开

EP4358281A1 ELECTRODE ASSEMBLY AND POWER BATTERY 审中-实审
公开(公告)号：EP4358281A1
公开(公告)日：2024-04-24
申请号：EP22900129.2
申请日：2022-10-18
申请人： Contemporary Amperex Technology Co., Limited
发明人： HUANG, Yaping , ZHANG, Xiaowen , ZHONG, Wei , QIAN, Pengcheng , LIN, Mingxiang
IPC分类号： H01M50/536
CPC分类号： Y02E60/10 , H01M50/533 , H01M50/536
摘要： Embodiments of the present disclosure provide an electrode assembly and a traction battery. The electrode assembly includes a plurality of tabs. The plurality of tabs is stacked to each other. At least one of the plurality of tabs includes a tab body and a free end connected to the tab body. The free end is formed into a bent portion through at least a single bending. The bent portion is stacked at a side of the tab body. In some specific embodiments, the tab is designed as a long tab with a long length. When ultrasonic welding is performed, the tab is bent to form the bent portion, and the bent portion is stacked on the tab body for the ultrasonic welding. In this case, since a thickness of a position where the ultrasonic welding is performed is increased, welding stability of the tab can be improved.

5. 发明公开

EP4283746A1 BATTERY CELL, BATTERY, POWER CONSUMING DEVICE, AND METHOD FOR MANUFACTURING BATTERY CELL 审中-实审
公开(公告)号：EP4283746A1
公开(公告)日：2023-11-29
申请号：EP21965030.6
申请日：2021-11-23
申请人： Contemporary Amperex Technology Co., Limited
发明人： XIAO, Haihe , ZHANG, Xiaowen , PENG, Shuangjuan , HUANG, Yaping , LI, Baiqing , JIN, Haizu , ZHOU, Xigen
IPC分类号： H01M10/0583 , H01M10/0525
摘要： The present application relates to the field of batteries, and in particular to a battery cell, a battery, a power consuming device, and a method for manufacturing a battery cell. The battery cell comprises a housing and an electrode assembly, which is arranged in the housing and comprises a first electrode plate and a second electrode plate with a polarity opposite to that of the first electrode plate, wherein the first electrode plate is folded back and forth in a first direction, so that the first electrode plate comprises a plurality of first stack sheets which are sequentially connected and are stacked, the second electrode plate is folded once in a second direction, so that the second electrode plate comprises two second stack sheets which are connected to each other, the second direction is perpendicular to or parallel to the first direction, the second stack sheets and the first stack sheets are sequentially alternately stacked, and a bent portion of the second electrode plate is in contact with an inner wall of the housing. On this basis, the performance of a laminated battery can be effectively improved.

6. 发明公开

EP3787071A1 POSITIVE ELECTRODE SHEET, MANUFACTURING METHOD THEREFOR, LITHIUM ION SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND DEVICE 有权转让
公开(公告)号：EP3787071A1
公开(公告)日：2021-03-03
申请号：EP19875359.2
申请日：2019-10-15
申请人： Contemporary Amperex Technology Co., Limited
发明人： GUO, Mingkui , WANG, Yaohui , HUANG, Yaping
IPC分类号： H01M4/131 , H01M10/0525
摘要： This application provides a positive-electrode plate, including a current collector, and a first active substance layer and a second active substance layer that are sequentially disposed on a surface of the current collector. The first active substance layer includes a first positive-electrode active material, and the first positive-electrode active material includes at least one of a compound represented by Formula (I) Li 1+x1 Mn a1 M 1-a1 O 2-y1 A y1 or a compound represented by Formula (II) Li 1+x2 Mn a2 N 2-a2 O 4-y2 B y2 . The second active substance layer includes a second positive-electrode active material having a pH value of from 10~12. In this application, the active substance layer that includes high-pH positive-electrode active material is disposed outside the active substance layer that includes a lithium manganese-based positive-electrode active material, so as to make a layered electrode plate. In this way, the release of manganese metal from the lithium manganese-based active material of the positive-electrode plate is drastically reduced without affecting power performance of battery cell, thereby improving high-temperature performance of battery cell. This application also discloses a manufacturing method of the positive-electrode plate, a lithium-ion secondary battery that includes the positive-electrode plate, a battery module, a battery pack, and an apparatus.

7. 发明公开

EP4290652A1 BATTERY AND ELECTRICAL APPARATUS 审中-实审
公开(公告)号：EP4290652A1
公开(公告)日：2023-12-13
申请号：EP22848071.1
申请日：2022-06-13
申请人： Contemporary Amperex Technology Co., Limited
发明人： XIAO, Haihe , ZHANG, Xiaowen , ZHOU, Xigen , TAO, Yong , PENG, Shuangjuan , HUANG, Yaping
IPC分类号： H01M10/613 , H01M10/625
摘要： Embodiments of this application provide a battery and an electric apparatus, where the battery includes: a plurality of battery cells ; a heat exchange pad, disposed between two adjacent battery cells and configured to exchange heat with the battery cells ; and a cooling pipe, configured to deliver cooling fluid, and the cooling pipe is provided with a plurality of outlets. The heat exchange pad is provided with inlets corresponding to the outlets , and the cooling pipe is configured to deliver the cooling fluid to the inlets of the heat exchange pad through the outlets. A flow channel that communicates with the inlets is further provided on the heat exchange pad , and the flow channel is configured to accommodate the cooling fluid to exchange heat between the cooling fluid and the battery cells . The technical solutions of the embodiments of this application can enhance the safety of the battery.

8. 发明公开

EP3896763A1 LITHIUM ION BATTERY 审中-实审
公开(公告)号：EP3896763A1
公开(公告)日：2021-10-20
申请号：EP19894710.3
申请日：2019-11-25
申请人： Contemporary Amperex Technology Co., Limited
发明人： GUO, Mingkui , WANG, Yaohui , HUANG, Yaping
IPC分类号： H01M4/66
摘要： The present invention relates to the field of electrochemistry, and in particular, to a lithium-ion battery and a preparation method thereof. The present invention provides a lithium-ion battery, including a positive electrode plate and a negative electrode plate, where the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer on at least one surface of the positive electrode current collector, the negative electrode plate includes a negative electrode current collector and a negative electrode active substance layer on at least one surface of the negative electrode current collector, a binder in the positive electrode active substance layer is uniformly distributed in a thickness direction of the active substance layer, and a binder in the negative electrode active substance layer is uniformly distributed in a thickness direction of the active substance layer. In the present invention, the active substance is coated by a binder before being applied as a coat to make an electrode, preventing the binder from floating up with solvent volatilization, and improving power and cycling. When this method is applied to a system with a high weight per unit area of active substance, power and cycling deterioration caused by an increase in thickness of the electrode plate can be effectively alleviated.

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