Lithium rechargeable cell with reference electrode for state of health monitoring
First Claim
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1. A battery, comprising:
- first and second working electrodes separated by at least one separator, the first working electrode in electrical connection with a first terminal, and the second working electrode in electrical connection with a second terminal;
one or more reference electrodes; and
a can housing the working electrodes and the one or more reference electrodes, wherein the can is electrically isolated from the first and second terminals and the one or more reference electrodes are integral to the can so that the can is electrically connected to the one or more reference electrodes to provide terminals for the one or more reference electrodes with the exterior of the can, and exposed metal surfaces of the can are coated with a nonporous electrically insulating coating.
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Abstract
A battery management system includes one or more lithium ion cells in electrical connection, each said cell comprising: first and second working electrodes and one or more reference electrodes, each reference electrode electronically isolated from the working electrodes and having a separate tab or current collector exiting the cell and providing an additional terminal for electrical measurement; and a battery management system comprising a battery state-of-charge monitor, said monitor being operable for receiving information relating to the potential difference of the working electrodes and the potential of one or more of the working electrodes versus the reference electrode.
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Citations
19 Claims
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1. A battery, comprising:
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first and second working electrodes separated by at least one separator, the first working electrode in electrical connection with a first terminal, and the second working electrode in electrical connection with a second terminal; one or more reference electrodes; and a can housing the working electrodes and the one or more reference electrodes, wherein the can is electrically isolated from the first and second terminals and the one or more reference electrodes are integral to the can so that the can is electrically connected to the one or more reference electrodes to provide terminals for the one or more reference electrodes with the exterior of the can, and exposed metal surfaces of the can are coated with a nonporous electrically insulating coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification