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    • 18. 发明申请
    • Process For Producing Electrode Active Material For Lithium Ion Cell
    • 锂离子电池用电极活性物质的制备方法
    • US20090148377A1
    • 2009-06-11
    • US11953953
    • 2007-12-11
    • Ralph E. MoshageEric MeyerQiuhua ZhangScott L. HogeDan HartsoughM. Yazid Saidi
    • Ralph E. MoshageEric MeyerQiuhua ZhangScott L. HogeDan HartsoughM. Yazid Saidi
    • C01B25/30
    • C01B25/45H01M4/136H01M4/5825
    • The present invention relates to a method for preparing a lithium vanadium phosphate material comprising mixing water, lithium dihydrogen phosphate, V2O3 and a source of carbon to produce a first slurry; wet blending the first slurry; spray drying the wet blended slurry to form a precursor composition; milling the precursor composition to obtain a milled precursor composition; compacting the milled precursor to obtain a compacted precursor; pre-baking the compacted precursor composition to obtain a precursor composition with low moisture content; and calcining the precursor composition with low moisture content at a time and temperature sufficient to produce a lithium vanadium phosphate. The lithium vanadium phosphate so produced can optionally be further milled to obtain the desired particle size. The electrochemically active lithium vanadium phosphate so produced is useful in making electrodes and batteries and more specifically is useful in producing cathode materials for electrochemical cells.
    • 本发明涉及一种制备磷酸钒锂材料的方法,包括将水,磷酸二氢锂,V 2 O 3和碳源混合以产生第一浆料; 湿混合第一浆料; 喷雾干燥湿混合浆料以形成前体组合物; 研磨前体组合物以获得研磨的前体组合物; 压实研磨的前体以获得压实的前体; 预先压制压实的前体组合物以获得低水分含量的前体组合物; 并在足以产生磷酸钒锂的时间和温度下煅烧具有低水分含量的前体组合物。 如此生产的磷酸钒锂可以任选地进一步研磨以获得所需的粒度。 如此生产的电化学活性锂钒磷酸盐可用于制造电极和电池,更具体地可用于生产用于电化学电池的阴极材料。
    • 19. 发明申请
    • DC-DC converter with improved dynamic response
    • DC-DC转换器具有改进的动态响应
    • US20080258701A1
    • 2008-10-23
    • US12081578
    • 2008-04-17
    • Yan-Fei LiuEric Meyer
    • Yan-Fei LiuEric Meyer
    • H02J1/00
    • H02M3/1588Y02B70/1466
    • The invention relates to a control method and a controller for a DC-DC converter, such as a synchronous Buck converter, which exploits the principle of capacitor charge balance to allow the converter to recover from a positive and/or negative load current step in the shortest achievable time, with the lowest possible voltage undershoot/overshoot. The control method may be implemented by either an analog or a digital circuit. The controller may be integrated with existing controller schemes (such as voltage-mode controllers) to provide superior dynamic performance during large-signal transient conditions while providing stable operation during steady state conditions. The invention also relates to a method and a modification of a DC-DC converter topology that comprises connecting a controlled current source between an input terminal and an output terminal of the DC-DC converter; detecting a load current step to a new load current; modifying a duty cycle of the DC-DC converter; and modifying current through a parallel output capacitor of the DC-DC converter by controlling current of the current source. The methods and circuits provided herein are applicable to Buck converters and Buck-derived converters such as forward, push-pull, half-bridge, and full-bridge converters.
    • 本发明涉及一种用于DC-DC转换器的控制方法和控制器,例如同步降压转换器,其利用电容器电荷平衡的原理来允许转换器从正,负负载电流步骤中恢复 最短可实现的时间,最低可能的电压下冲/过冲。 控制方法可以由模拟或数字电路来实现。 控制器可以与现有的控制器方案(例如电压模式控制器)集成,以在大信号瞬态条件下提供优异的动态性能,同时在稳态条件下提供稳定的操作。 本发明还涉及DC-DC转换器拓扑的方法和修改,其包括在DC-DC转换器的输入端和输出端之间连接受控电流源; 检测负载电流步长到新的负载电流; 修改DC-DC转换器的占空比; 以及通过控制电流源的电流来修改DC-DC转换器的并联输出电容器的电流。 本文提供的方法和电路适用于降压转换器和降压型转换器,例如正向,推挽,半桥和全桥转换器。