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Dimensional constraints for three-dimensional batteries

A technology of restraints and secondary batteries, which is applied to lithium batteries, battery electrodes, secondary batteries, etc., and can solve problems such as battery failures

Active Publication Date: 2019-03-15
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

Expansion and contraction during cycling often poses problems for battery reliability and cycle life because when electrodes swell, electrical shorts and battery failures occur

Method used

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  • Dimensional constraints for three-dimensional batteries
  • Dimensional constraints for three-dimensional batteries
  • Dimensional constraints for three-dimensional batteries

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0329] This example illustrates an example of a method of manufacturing an electrode assembly 106 having a set of constraints 108 . here will Figure 21 called an example of the method.

[0330] In this example, in step S1, the anode and cathode stems 134, 141, respectively, are fabricated. Then, as shown in step S2 , the anode 110 is fabricated by forming an anode active material 132 (eg, silicon-containing material) on the anode stem 134 . In step S3, the anode and cathode current collectors 136, 140 are fabricated, respectively. As shown in step S4, a set of restraints 108 is manufactured. In step S5 , a material for forming the separator 130 is deposited on the side of the anode current collector 136 . In step S6 , cathode active material 138 is formed by depositing material between anode structure 110 and cathode stem 141 . Finally, in step S7, the electrode assembly 106 is connected to the tab, packaged, filled with electrolyte and sealed. According to one embodime...

Embodiment 1

[0332] Embodiment 1. A secondary battery that circulates between a charged state and a discharged state, the secondary battery includes a battery case, an electrode assembly located in the battery case, carrier ions, a non-aqueous liquid electrolyte, and a set of electrode constraints, where

[0333] The electrode assembly has a longitudinal axis, a transverse axis, and a vertical axis perpendicular to each other, a first longitudinal end surface and a second longitudinal end surface separated from each other in the longitudinal direction, and a longitudinal axis A surrounding the electrode assembly. EA and connecting the first longitudinal end surface and the transverse surface of the second longitudinal end surface, the transverse surface has a spacer on opposite sides of the longitudinal axis and separated in a first direction orthogonal to the longitudinal axis. Relative to the first region and the second region, the electrode assembly has a maximum width W measured in the...

Embodiment 2

[0338] Embodiment 2. The secondary battery of embodiment 1, wherein the primary confinement array constrains growth of the electrode assembly in the longitudinal direction such that during 30 consecutive cycles of the secondary battery, the Any increase in the Feret diameter of the electrode assembly in the longitudinal direction is less than 20%.

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Abstract

A secondary battery is provided for cycling between a charged and a discharged state, the secondary battery including a battery enclosure, an electrode assembly, carrier ions, a non-aqueous liquid electrolyte within the battery enclosure, and a set of electrode constraints. The set of electrode constraints includes a primary constraint system having first and second primary growth constraints andat least one primary connecting member, the first and second primary growth constraints separated from each other in the longitudinal direction, wherein the primary constraint array restrains growth of the electrode assembly in the longitudinal direction such that any increase in the Feret diameter of the electrode assembly in the longitudinal direction over 20 consecutive cycles of the secondarybattery is less than 20%. The set of electrode constraints further includes a secondary constraint system having first and second secondary growth constraints connected by at least one secondary connecting member, wherein the secondary constraint system at least partially restrains growth of the electrode assembly in a second direction upon cycling of the secondary battery.

Description

[0001] Cross References to Related Applications [0002] This application is a PCT application claiming priority benefit of U.S. Patent Application No. 62 / 335,912 filed May 13, 2016 and claiming priority benefit of U.S. Patent Application No. 62 / 422,958 filed November 16, 2016, which The entire contents of both patent applications are incorporated herein by reference. technical field [0003] The present disclosure generally relates to structures for use in energy storage devices, to energy storage devices employing such structures, and to methods for fabricating such structures and energy devices. Background technique [0004] 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, or magnesium ions move between positive and negative electrodes through an electrolyte. Secondary batteries may include a single cell, or two or more cells that have been electrically coupled to form a bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0525H01M10/054H01M10/04
CPCH01M10/058H01M10/0585H01M10/054H01M10/052H01M10/04H01M10/0525Y02E60/10Y02P70/50H01M4/02H01M10/02H01M10/44H01M2004/021
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·S·沙阿R·J·孔特雷拉斯L·范埃尔登V·迪欧梅夫
Owner 艾诺维克斯运营公司
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