Longitudinal constraints for energy storage devices

Abstract

A energy storage device for cycling between a charged state and a discharged state, the energy storage device including an enclosure, an electrode assembly and a non-aqueous liquid electrolyte withinthe enclosure, and a constraint that maintains a pressure on the electrode assembly as the energy storage device is cycled between the charged and the discharged states.

Description

technical field [0001] The present disclosure generally relates to structures for energy storage devices, energy storage devices incorporating such structures, and methods for making such structures and energy devices. Background technique [0002] A rocking chair or plug-in secondary battery is a type of energy storage device in which carrier ions such as lithium, sodium, potassium, calcium, magnesium, or aluminum ions are moved between positive and negative electrodes through an electrolyte. Secondary batteries may include a single battery cell or two or more battery cells that have been electrically coupled to form a battery, where each battery cell includes a positive electrode, a negative electrode, a microporous separator, and an electrolyte. [0003] In rocking-chair cells, both the positive and negative structures include materials in which carrier ions are inserted and extracted. When the battery discharges, carrier ions are extracted from the negative electrode an...

AI Technical Summary

Problems solved by technology

[0007] However, one of the challenges associated with secondary batteries is the reliability and cycle life of the battery

For example, the electrode structure of a lithium-ion battery tends to expand (swell) and contract as the battery is repeatedly charged and discharged, which in turn can lead to electrical shorting and failure of the device

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