BATTERY MODULE WITH ACTIVE CELL BALANCING USING ENERGY STORAGE ELEMENT AND TWO TIERS OF SWITCHES

    公开(公告)号:US20200014219A1

    公开(公告)日:2020-01-09

    申请号:US16030083

    申请日:2018-07-09

    Abstract: A battery system includes a battery module, an active cell balancing circuit, and a battery controller. Each cell has diametrically-opposed positive and negative cell tabs. The circuit includes voltage sensors and, at each end of the battery module, first and second tiers of switches and an energy storage element. Each voltage sensor is located between a different pair of adjacent cells. The controller receives measured voltages from the sensors indicative of an electric potential between adjacent battery cells. Responsive to the measured voltages, the controller commands the first tier to selectively connect or disconnect designated pairs of cells to the corresponding second tier. The controller also commands the second tier to selectively connect or disconnect the designated cells to a corresponding energy storage element. This action shuttles energy between the designated pairs of battery cells to balance a state of charge.

    Battery module with active cell balancing using energy storage element and two tiers of switches

    公开(公告)号:US11146076B2

    公开(公告)日:2021-10-12

    申请号:US16030083

    申请日:2018-07-09

    Abstract: A battery system includes a battery module, an active cell balancing circuit, and a battery controller. Each cell has diametrically-opposed positive and negative cell tabs. The circuit includes voltage sensors and, at each end of the battery module, first and second tiers of switches and an energy storage element. Each voltage sensor is located between a different pair of adjacent cells. The controller receives measured voltages from the sensors indicative of an electric potential between adjacent battery cells. Responsive to the measured voltages, the controller commands the first tier to selectively connect or disconnect designated pairs of cells to the corresponding second tier. The controller also commands the second tier to selectively connect or disconnect the designated cells to a corresponding energy storage element. This action shuttles energy between the designated pairs of battery cells to balance a state of charge.

    CONTINUOUS HANDS-FREE BATTERY MONITORING AND CONTROL

    公开(公告)号:US20200076014A1

    公开(公告)日:2020-03-05

    申请号:US16120627

    申请日:2018-09-04

    Abstract: A battery module includes battery cells and a cell monitoring unit (CMU). The CMU includes a radio frequency (RF) communications circuit and a cell sense circuit connected to a substrate, the latter in wireless communication with the RF communications circuit. The cell sense circuit measures battery data, including a cell voltage and a cell temperature of each battery cell. The CMU includes a microprocessor in communication with the RF communications and cell sense circuits. The microprocessor determines when the battery module has been dormant for a predetermined dormancy duration during which the battery cells are neither charging nor discharging. Responsive to such dormancy, a Long-Term Data Storage Mode is executed in which the RF communications circuit paired with the cell sense circuit, collects the battery data at a calibrated interval, and wirelessly transmits the battery data to flash memory of the CMU for storage therein.

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