BATTERY CORE HERMETIC CASING

摘要

A battery cell core is hermetically sealed inside a casing, with conductive paths formed in the casing that individually connect cell subsets of the core to a battery management circuit for detecting individual failing cell subsets and for changing the battery output voltage by forming series/parallel connections between the cell subsets. In one version, the casing has a metal can with an opening of the can being sealed by a non-conductive cap that is sealed and bonded along its periphery to the can walls. In one aspect, the cap has edge metallization along its periphery where it is sealed to the can walls. In another aspect, the conductive paths are formed in the non-conductive cap. Various other embodiments are also described and claimed.

主权项

1. A battery comprising:
a battery management circuit; a hermetically sealed casing inside which a battery cell core is contained, the core having a plurality of cell subsets, each cell subset comprising at least one battery cell; and a plurality of conductive paths formed in the casing through which each cell subset is individually connected to the battery management circuit,
wherein the battery management circuit 1) senses individual voltage of each of the cell subsets through the conductive paths to detect a failing cell subset and prevents the failing cell subset from contributing to an output voltage of the battery, and 2) connects one of the cell subsets with another one of the cell subsets in series or in parallel through the conductive paths to change the output voltage of the battery.