BATTERY FAULT TOLERANT ARCHITECTURE FOR CELL FAILURE MODES PARALLEL BYPASS CIRCUIT
First Claim
1. A battery circuit comprising a plurality of battery modules electrically coupled in parallel, each battery module including a plurality of battery cells electrically coupled in series, each battery module also including a control device operable to disconnect the battery module from the other battery modules in response to battery cell failure or potential failure.
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Accused Products
Abstract
A by-pass circuit for a battery system that disconnects parallel connected cells or modules from a battery circuit or controls the current through the parallel connected cells or modules. If a cell has failed or is potentially failing in the system, then the by-pass circuit can disconnect the cell or module from other cells or modules electrically coupled in parallel. If a cell or module has a lower capability than another cell or module, then the by-pass circuit can control the current to the cell or module to maximize the performance of the system and prevent the system from creating a walk-home condition.
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Citations
19 Claims
- 1. A battery circuit comprising a plurality of battery modules electrically coupled in parallel, each battery module including a plurality of battery cells electrically coupled in series, each battery module also including a control device operable to disconnect the battery module from the other battery modules in response to battery cell failure or potential failure.
- 11. A battery circuit comprising a plurality of battery modules electrically coupled in parallel, each battery module including a plurality of battery cells electrically coupled in series, each battery module also including a control device that includes circuit components that control the time that a discharge current flows from the module and a charge current flows to the module where the circuit components are operable to disconnect the battery module from the other battery modules.
- 17. A battery circuit for a battery in a hybrid vehicle, said battery circuit comprising a plurality of battery modules electrically coupled in parallel, each battery module including a plurality of battery cells electrically coupled in series, each battery module also including a control device that includes circuit components that control the time that a discharge current flows from the module and a charge current flows to the module where the circuit components are operable to disconnect the battery module from the other battery modules, wherein the control device includes a logic circuit, a first current path including a first switch and a second current path including a second switch, where the first current path allows current to flow into the module and the second current path allows current to flow out of the module.
Specification