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Longitudinal Constraints for Energy Storage Devices

A technology of longitudinal end and longitudinal axis, which is applied in the structural field of energy storage equipment, and can solve problems such as faults and equipment short circuits

Active Publication Date: 2021-06-15
艾诺维克斯运营公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Longitudinal Constraints for Energy Storage Devices
  • Longitudinal Constraints for Energy Storage Devices
  • Longitudinal Constraints for Energy Storage Devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] A secondary battery for cycling between a state of charge and a state of discharge, the secondary battery comprising a battery case, an electrode assembly and a non-aqueous liquid electrolyte within the battery case, and a constraint that changes as the secondary battery is in the state of charge Cycling between and discharge states maintains pressure on an electrode assembly comprising a set of electrode structures, a set of counter electrode structures, and an electrically insulating microporous diaphragm material between the electrodes and members of the counter electrode set, wherein

[0132] The electrode assembly has opposing first and second longitudinal end surfaces separated along a longitudinal axis, and side surfaces surrounding the longitudinal axis and connecting the first and second longitudinal end surfaces, the first and second longitudinal end surfaces having a surface area smaller than that of the electrode 33% of the surface area of ​​the component,

...

Embodiment 2

[0138] The secondary battery according to embodiment 1, wherein the constraint applies an average compressive force of at least 0.7 kPa to each of the first and second projected areas, averaged over the surface areas of the first and second projected areas, respectively.

Embodiment 3

[0140] The secondary battery according to embodiment 1, wherein the confinement applies an average compressive force of at least 1.75 kPa to each of the first and second projected areas, averaged over the surface areas of the first and second projected areas, respectively.

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Abstract

An energy storage device for cycling between a state of charge and a state of discharge, the energy storage device comprising a housing, an electrode assembly and a non-aqueous liquid electrolyte within the housing, and a constraint that increases as the energy storage device is charged and discharged Cycling between states maintains pressure on the electrode assembly.

Description

technical field [0001] The present disclosure relates generally to structures for energy storage devices, to energy storage devices incorporating such structures, and to methods for fabricating 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 ions, sodium ions, potassium ions, calcium ions, magnesium ions, or aluminum ions move between positive and negative electrodes through an electrolyte. A secondary battery 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 electrode structures include materials into which carrier ions are inserted and extracted. When the battery is discharged, carrier ion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/05H01M10/04H01M50/414H01M50/417H01M50/426H01M50/491H01M50/497H01M50/55H01M50/553
CPCH01M10/0468H01M10/0525H01M50/491H01M50/553H01M50/497H01M50/55H01M50/414H01M50/426H01M50/417H01M2004/021Y02E60/10Y02P70/50H01M50/202H01M50/233H01M50/471H01M50/446
Inventor R·S·布萨卡A·拉希里M·拉马苏布拉马尼亚B·A·瓦尔德斯G·C·戴尔斯C·J·斯宾特G·M·霍H·J·鲁斯特三世J·D·威尔科克斯J·F·瓦尔尼K·H·李N·沙阿R·J·孔特雷拉斯L·范埃尔登K·S·马苏巴雅士J·J·达尔顿
Owner 艾诺维克斯运营公司
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