Electrochemical double layer capacitor having carbon powder electrodes

    公开(公告)号:US20030086238A1

    公开(公告)日:2003-05-08

    申请号:US10005885

    申请日:2001-11-02

    CPC classification number: H01G9/155 H01G11/32 Y02E60/13 Y10T29/417

    Abstract: A method of making an electrode structure, the electrode structure and a double layer capacitor including the electrode structure, the method comprising the steps of: forming a plurality of electrodes, each having a current collector plate, a primary coating formed on each side of the collector plate, the primary coating including conducting carbon powder and a binder, and a secondary coating formed on each primary coating, the secondary coating including activated carbon powder, a solvent and a binder; positioning a respective separator between each electrodes while stacking the electrodes such that the respective separator is juxtaposed against respective secondary coatings of adjacent electrodes that electrically insulates the adjacent electrodes, whereby forming an electrode stack; and rolling the electrode stack into a cylindrical electrode structure.

    Systems and methods for improving cell balancing and cell failure detection

    公开(公告)号:US10931123B2

    公开(公告)日:2021-02-23

    申请号:US15061290

    申请日:2016-03-04

    Inventor: Ilya Kaminsky

    Abstract: Disclosed are systems and methods for improved cell-balancing circuits, back-up failure detection circuits and alarm extension for cells and modules of an energy storage system. One aspect of the invention comprises an energy storage device cell balancing apparatus. The apparatus comprises a first and a second dissipative component connected in series. The first dissipative component and the second dissipative component are coupled to an energy storage cell. The second dissipative component monitors a voltage of the energy storage cell and, if the voltage is at or above a reference voltage, the second dissipative component conducts a discharging current through the first and second dissipative components. The first dissipative component maintains a voltage drop across the first dissipative component that is proportional to the voltage of the energy storage cell. The second dissipative component maintains a constant voltage drop across the second dissipative component when conducting the discharging current.

    COMPOSITIONS AND METHODS FOR PASSIVATION OF ELECTRODE BINDERS

    公开(公告)号:US20200152968A1

    公开(公告)日:2020-05-14

    申请号:US16495203

    申请日:2018-03-20

    Abstract: Passivation methods and compositions for electrode binders are disclosed. A coated binder particle for use in an electrode film of an energy storage device is provided. The coated binder particle can comprise a coating over the surface of a binder particle, wherein the coating provides ionic insulation to the binder particle. In some embodiments, the coating covers the entire surface of the binder particle. In still further embodiments, a coated binder particle in an energy storage device blocks ionic contact between the binder and an electrolyte.

    Methods and apparatuses for polymer fibrillization under electric field

    公开(公告)号:US10547045B2

    公开(公告)日:2020-01-28

    申请号:US14642471

    申请日:2015-03-09

    Abstract: A method of fibrillizing a fibrillizable binder component of an electrode film can include providing a negatively charged fibrillizable binder component, and applying an electric field upon the negatively charged binder component to fibrillize the negatively charged fibrillizable binder component. A system for fibrillizing a binder component of an electrode film can include a mixing container made of a material having an affinity to donate electron(s) to the binder component, and an actuator configured to apply a force upon the mixing container so as to contact the mixing container with the binder component and to move the mixing container and the binder component relative to each other within a speed and range of motion sufficient to create an electrostatic force on the binder component and fibrillize the binder component.

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