Battery Management System having an Increased Robustness against Negative Voltages

摘要

A battery management system includes at least one cell monitoring unit with a plurality of cell voltage terminals, supply lines coupled to the cell voltage terminals, and a cell monitoring circuit made of a plurality of electronic semiconductor modules connected in parallel via the supply lines. The battery management system is configured to monitor a plurality of battery cells via the cell monitoring unit. The battery cells are in each case connected on both sides with their respective positive battery cell terminal and negative battery cell terminal to the battery management system via the cell voltage terminals. Furthermore, one or several supply lines are provided with a melt fuse so that in each battery cell that is connected to the battery management system at least one supply line coupled to the battery cell comprises a melt fuse in its current path.

主权项

1. A battery management system comprising:
at least one cell monitoring unit including a plurality of cell voltage connections, a plurality of supply lines coupled to the cell voltage connections, and a at least one cell monitoring circuit including a plurality of electronic semiconductor modules connected in parallel by the plurality of supply lines, wherein the battery management system is configured to monitor a plurality of battery cells with the at least one cell monitoring unit, wherein each battery cell of the plurality of battery cells includes a positive battery cell terminal and a negative battery cell terminal and is connected on both sides by the positive battery cell terminal and the negative battery cell terminal to the battery management system with cell voltage connections of the plurality of cell voltage connections, and wherein one or more of the supply lines include a fuse, with the result that, for each battery cell of the plurality of battery cells connected to the battery management system, at least one of the supply lines coupled to the battery cell has a fuse in the current path thereof.