Battery-monitoring unit
AssigneeWebasto SE
InventorsMartin Zoske, Hans Beyer, Jonas Keutmann, Felix König
Life of this patent
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Abstract
The present invention relates to a battery-monitoring unit, comprising an interface which is configured to receive electrical voltages for each battery group comprising at least two battery cells being connected to each another in parallel and of a battery coupled with the battery-monitoring unit and comprising at least two battery groups, where an evaluation unit is provided which is configured to compare the voltages, received from the interface, of at least two series-connected battery groups with each another and to output a signal based on the result of the comparison.
Claims15
A battery-monitoring unit, including an interface which is coupled to a battery comprising at least two battery groups and which is configured to receive electrical terminal voltages for each battery group comprising at least two battery cells being connected to each other in parallel, further comprising:
- an evaluation unit which is configured to receive the terminal voltages from the interface of at least two different and series-connected battery groups and to compare the terminal voltages with each other and to output a signal based on the result of the comparison, wherein the evaluation unit is configured to determine a comparative value of the terminal voltages between the different battery groups received from the interface and to output a signal based on the comparative value, wherein the evaluation unit is configured to determine a change of resistance for the respective battery group on the basis of the comparative value and a current/voltage characteristic curve corresponding to empirical values of a plurality of corresponding second batteries having a corresponding battery state of the battery, wherein the change of resistance is characteristic of a fault presence.
A traction battery, comprising a battery-monitoring unit and comprising at least two battery groups, each battery group comprising a plurality of cylindrical battery cells being interconnected in parallel, wherein the battery-monitoring unit includes an interface which is coupled to the battery comprising at least two battery groups and which is configured to receive electrical terminal voltages for each battery group comprising at least two battery cells being connected to each other in parallel, further comprising:
- an evaluation unit which is configured to receive the terminal voltages from the interface of at least two different and series-connected battery groups and to compare the terminal voltages with each other and to output a signal based on the result of the comparison, wherein the evaluation unit is configured to determine a comparative value of the terminal voltages between the different battery groups received from the interface and to output a signal based on the comparative value, wherein the evaluation unit is configured to determine a change of resistance for the respective battery group on the basis of the comparative value and a current/voltage characteristic curve corresponding to empirical values of a plurality of corresponding second batteries having a corresponding battery state of the battery, wherein the change of resistance is characteristic of a fault presence.
Dependencies are inferred from the claim text.