Bypass apparatus and method for series connected energy storage devices
    4.
    发明授权
    Bypass apparatus and method for series connected energy storage devices 失效
    串联连接储能装置的旁路装置及方法

    公开(公告)号:US06046514A

    公开(公告)日:2000-04-04

    申请号:US900325

    申请日:1997-07-25

    摘要: A bypass apparatus and method for series connected energy storage devices. Each of the energy storage devices coupled to a common series connection has an associated bypass unit connected thereto in parallel. A current bypass unit includes a sensor which is coupled in parallel with an associated energy storage device or cell and senses an energy parameter indicative of an energy state of the cell, such as cell voltage. A bypass switch is coupled in parallel with the energy storage cell and operable between a non-activated state and an activated state. The bypass switch, when in the non-activated state, is substantially non-conductive with respect to current passing through the energy storage cell and, when in the activated state, provides a bypass current path for passing current to the series connection so as to bypass the associated cell. A controller controls activation of the bypass switch in response to the voltage of the cell deviating from a pre-established voltage setpoint. The controller may be included within the bypass unit or be disposed on a control platform external to the bypass unit. The bypass switch may, when activated, establish a permanent or a temporary bypass current path.

    摘要翻译: 一种串联连接储能装置的旁路装置及方法。 耦合到公共串联连接的每个能量存储装置具有与其并联连接的相关联的旁路单元。 电流旁路单元包括传感器,其与相关联的能量存储装置或电池并联耦合,并且感测指示电池的能量状态(例如电池电压)的能量参数。 旁路开关与能量存储单元并联耦合并且可在非激活状态和激活状态之间操作。 旁路开关在处于非激活状态时相对于通过能量存储单元的电流基本上不导通,并且当处于激活状态时,旁路开关提供用于使电流流向串联连接的旁路电流路径,以便 绕过关联的单元格。 控制器响应于电池的电压偏离预先建立的电压设定值来控制旁路开关的激活。 控制器可以包括在旁路单元内或者被布置在旁路单元外部的控制平台上。 旁路开关可以在被激活时建立永久或临时旁路电流路径。