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公开(公告)号：US11437623B2
公开(公告)日：2022-09-06
申请号：US17542533
申请日：2021-12-06
发明人： Rui Shen , Jianjun Ma , Libing He
摘要： This application discloses a secondary battery and an apparatus containing the secondary batteries. The secondary battery includes a positive electrode plate and a negative electrode plate, the positive electrode plate comprising a positive electrode current collector and a positive electrode film comprising a positive active material; the negative electrode plate comprising a negative electrode current collector and a negative electrode film comprising a negative electrode active material, wherein the positive active material comprises one or more of layered lithium transition metal oxides and modified compounds thereof, the negative electrode active material comprises artificial graphite and natural graphite, and the negative electrode plate satisfies 0.02≤I3R(012)/I2H(100)≤0.18, alternatively the positive active material comprises one or more of lithium-containing phosphates with olivine structure and modified compounds thereof, the negative electrode active material includes artificial graphite and natural graphite, and the negative electrode plate satisfies 0.04≤I3R(012)/I2H(100)≤0.22.
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公开(公告)号：US11420875B2
公开(公告)日：2022-08-23
申请号：US17586725
申请日：2022-01-27
发明人： Chengdu Liang , Yuzhen Zhao , Yingjie Guan , Yan Wen , Qisen Huang
摘要： This application belongs to the field of energy storage technology, and specifically discloses a negative active material including SiOx particles and a modified polymer coating layer covering the SiOx particles, in which 0
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公开(公告)号：US11413965B2
公开(公告)日：2022-08-16
申请号：US17482455
申请日：2021-09-23
发明人： Yanhui Fu , Guoxiu Wu , Baohai Du , Changjian Liu
IPC分类号： B60L3/00 , H03K17/687
摘要： The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller. The embodiments of the application improve the accuracy of fault detection.
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公开(公告)号：US11355742B2
公开(公告)日：2022-06-07
申请号：US16679168
申请日：2019-11-09
发明人： Zhiqiang Li , Changlong Han
IPC分类号： H01M4/133 , H01M4/505 , H01M4/525 , H01M4/587 , H01M10/0525 , H01M10/0567 , H01M4/02
摘要： This application discloses a negative electrode plate and a lithium-ion secondary battery, wherein the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on at least one surface of the negative electrode current collector, and wherein the negative active material layer includes a graphite material; wherein a ratio r between diffraction peak intensity of (004) crystal surface and diffraction peak intensity of (110) crystal surface of the negative electrode plate, a porosity s of the negative electrode plate, and a resistivity t of the negative electrode plate satisfy: 0.05 ≤ 100 × s r × t ≤ 10. The negative electrode plate and the lithium-ion secondary battery provided by this application can simultaneously achieve high safety performance, cycle performance and rate performance.
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公开(公告)号：US11316158B2
公开(公告)日：2022-04-26
申请号：US17159138
申请日：2021-01-26
发明人： Yingjie Guan , Yuzhen Zhao , Yan Wen , Qisen Huang , Xin Liu
摘要： The present application provide a secondary battery and related battery module, battery pack and apparatus. The secondary battery includes a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the secondary battery includes a positive active material selected from one or more of layered lithium nickel cobalt manganese oxide and layered lithium nickel cobalt aluminum oxide, and a negative active material including graphite and silicon-oxygen compound; the delithiation capacity A of the negative electrode film in the voltage range of 0.005V to the delithiation platform voltage and the delithiation capacity B of the negative electrode film in the voltage range of the delithiation platform voltage to 1.2V satisfy: 1A/B2; and when the secondary battery is discharged to a voltage of 2.5V, the voltage U of the negative electrode plate relative to a lithium metal reference electrode satisfies: 0.5VU0.7V.
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公开(公告)号：US11309598B2
公开(公告)日：2022-04-19
申请号：US16233096
申请日：2018-12-27
发明人： Zhimin Dan , Wenbin Lu , Wei Zhang , Yizhen Hou , Teng Yu , Xiyang Zuo , Xingyuan Wu , Taosheng Zhu
IPC分类号： H01M10/615 , H01M10/651 , H01M10/6571 , H01M10/42 , G01R31/382 , G01R19/165
摘要： The present disclosure provides a heating control method and a heating control device. The heating control method includes: acquiring an average current value in a heating circuit of a power battery pack; calculating a current output value required for nth cycle according to an average current value of the nth cycle, an average current value of (n−1)th cycle, an average current value of (n−2)th cycle, a preset current value, n is equal to or greater than 3; outputting a PWM signal to a switch device of the heating circuit according to a pre-calibrated PWM control parameter corresponding to the current output value so that a difference between an actual current value in the heating circuit and the preset current value is less than a preset threshold.
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公开(公告)号：US11251720B1
公开(公告)日：2022-02-15
申请号：US17485554
申请日：2021-09-27
发明人： Weichen He , Zhimin Dan , Jinfeng Gao , Yizhen Hou
摘要： This application provides a method and an apparatus for controlling a grid-tie inverter. The method includes: acquiring an output voltage of the grid-tie inverter and an output current value of the grid-tie inverter at a current moment; calculating N output current values of the grid-tie inverter at a next moment that is in one-to-one correspondence to N switch states of the grid-tie inverter based on the output current value at the current moment, and N is a natural number greater than or equal to 2; acquiring a first reference current based on the output voltage; acquiring a second reference current based on the output current and the first reference current; determining a first switch state; and controlling the grid-tie inverter to perform power transmission in the first switch state at the next moment.
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公开(公告)号：US11251504B2
公开(公告)日：2022-02-15
申请号：US16544536
申请日：2019-08-19
发明人： Jianxiong Yang
IPC分类号： H01M50/54 , H01M50/172 , H01M50/183 , H01M50/543
摘要： The disclosure relates to a cap assembly and a secondary battery. The cap assembly comprises: a cap plate comprising an electrode lead-out hole; an electrode terminal disposed at a side of the cap plate and covering the electrode lead-out hole; a fixing component, wherein the fixing component and the electrode terminal are disposed at the same side of the cap plate, the electrode terminal is connected to the cap plate through the fixing component, and the fixing component comprises a protrusion extending between the electrode terminal and the cap plate; and a sealing ring, wherein the cap plate is connected to the electrode terminal through the sealing ring, and in an axial direction of the electrode lead-out hole, a projection of the sealing ring at least partially overlaps with a projection of the protrusion.
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公开(公告)号：US11249123B2
公开(公告)日：2022-02-15
申请号：US17134564
申请日：2020-12-28
发明人： Zhimin Dan , Yizhen Hou , Weiping Sun , Meng Li , Wei Zhang , Teng Yu
IPC分类号： G01R27/20 , H01H47/00 , H01M10/42 , B60L50/60 , B60L3/00 , B60L3/12 , G01R31/327 , G01R31/00
摘要： Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes: controlling an insulation resistance obtaining circuit to output an AC signal; when both a main relay and a pre-charge relay are switched off, obtaining a first phase shift of the AC signal between two sampling points according to first collected electrical signals; obtaining an internal side insulation resistance of the main relay according to the first collected electrical signals and the first phase shift; controlling the pre-charge relay to be switched on; when the main relay is switched off and the pre-charge relay is switched on, obtaining a second phase shift of the AC signal between the two sampling points according to second collected electrical signals; and obtaining an external side insulation resistance of the main relay according to the second collected electrical signals and the second phase shift.
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公开(公告)号：US11237215B2
公开(公告)日：2022-02-01
申请号：US16816230
申请日：2020-03-11
发明人： Jiazheng Wang , Meng Kang , Xiaobin Dong , Yuliang Shen , Libing He
IPC分类号： G01R31/367 , G01R31/385 , H01M10/42 , H01M4/02
摘要： The present application provides a method for determining fast charge performance of a negative electrode plate and a method for designing a negative electrode plate. By utilizing the method(s) according to the present application, the charging speed of a negative electrode plate can be quickly evaluated and the design period of a negative electrode plate in a fast charge battery can be greatly shortened.
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