WO2018089323A2 - Dielectric separator compressor - Google Patents

Dielectric separator compressor Download PDF

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Publication number
WO2018089323A2
WO2018089323A2 PCT/US2017/060278 US2017060278W WO2018089323A2 WO 2018089323 A2 WO2018089323 A2 WO 2018089323A2 US 2017060278 W US2017060278 W US 2017060278W WO 2018089323 A2 WO2018089323 A2 WO 2018089323A2
Authority
WO
WIPO (PCT)
Prior art keywords
dielectric
metal screen
screen
compressor according
separator compressor
Prior art date
Application number
PCT/US2017/060278
Other languages
French (fr)
Other versions
WO2018089323A3 (en
Inventor
Halbert P. Fischel
Original Assignee
Global Energy Science, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US15/348,456 external-priority patent/US20170062787A1/en
Application filed by Global Energy Science, Llc filed Critical Global Energy Science, Llc
Publication of WO2018089323A2 publication Critical patent/WO2018089323A2/en
Publication of WO2018089323A3 publication Critical patent/WO2018089323A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure is directed to a
  • dielectric separator compressor for use in a secondary battery assembly.
  • a secondary battery is configured such that a cathode and an anode having an active material layer, which is formed by one of; coating an active material with a binder and laying a membrane containing active material on a collector, are connected via an electrolyte layer.
  • the cathode and anode so connected are contained in a battery case .
  • secondary batteries such as lithium ion secondary batteries
  • an electrode group comprising a positive electrode, a negative electrode and a separator for electrically
  • the separator functions to prevent a short- circuit between the positive and negative electrodes during normal operation so as to ensure safety of the battery.
  • a dielectric separator compressor comprising a dielectric sheet having a first side and a second side opposite the first side.
  • a first metal screen is coupled to the first side of the dielectric sheet; and a second metal screen is coupled to the second side of the dielectric sheet .
  • the dielectric separator compressor further comprises an adhesive applied between the first metal screen and the dielectric sheet and the adhesive is applied between the second metal screen and the dielectric sheet.
  • the adhesive is applied to at least one cross-over intersection of each of the first metal screen and the second metal screen .
  • the first metal screen and the second metal screen comprise a
  • the dielectric sheet comprises a dielectric material, having electrical insulating characteristics.
  • first metal screen and the second metal screen comprise a
  • the stainless steel mesh material comprises a 160, 100 and 30 mesh square weave metal screen.
  • the dielectric sheet comprises a porous dielectric material, having electrical insulating characteristics.
  • At least one of the first and second metal screen comprise one of a plurality of metal screens sintered to comprise a single screen with aligned window registry.
  • Figure 1 is a fragmentary side view of an
  • Figure 2 is a top plan view of an exemplary rigid compression screen
  • Figure 3 is a top plan sectional view of the exemplary woven screen segment of the exemplary rigid compression screen.
  • separator compressor 10 comprises a dielectric sheet 12 between a first metal screen 14 and a second metal screen 16.
  • An adhesive 18 couples the first metal screen 14 to an upper surface 20 of the dielectric sheet 12.
  • Adhesive 18 also couples the second metal screen 16 to a lower surface 22 of the dielectric sheet 12.
  • the first metal screen 14 and the second metal screen 16 are aligned in a window registry.
  • each screen, 14, 16 may comprise one of; one and a plurality of metal screens sintered to comprise a single screen with aligned window registry .
  • the dielectric sheet 12 can comprise one of;
  • the sheet 12 can be a polyester film such as Bi-axially-oriented polyethylene terephthalate (BoPET) which has excellent properties of high tensile strength, chemical and dimensional stability and electrical insulation.
  • Other materials include porous PTFE high density polyethylene (HDPE) , polyethylene (PE), polyimide (PI) and the like.
  • the dielectric sheet 12 prevents the conduction of electrical current through the sheet.
  • Figure 2 shows a simplified schematic top plan view of the first metal screen 14 and second metal screen 16 in the form of a planar, rigid compression screen 24.
  • the screen 24 defines locations for uncompressed sections between contiguous segments 28, 30, 32, 34 of the screen 24, wherein the contiguous segments 28, 30, 32, 34 are configured to be cooperatively positioned to define open areas 36.
  • Contiguous segments 28, 30, 32, 34 are configured to be the raised pattern for the compressor 10.
  • perimeter 38 of the screen 24 matches a perimeter (not shown) of the sheet 12.
  • Figure 3 shows a segment of the screen 24, which may also be referred to as a square weave cloth 24, that may be used to form a plurality of connecting areas 42 (shown in Figure 1) for a pellicle (not shown) that can be coupled to the dielectric separator compressor 10. Wherever strands 44 form cross-over intersections 46 the
  • the woven screen 24 may also include a weave defining open squares (windows) 48 that make up greater than about 60% to about 75%, and preferably about 65%, of a projected window planar surface area defined by the woven screen 24.
  • the open squares define the uncompressed sections (not shown) of the galvanic pellicle.
  • wire strands 44 making up the woven screen 24 may be made of materials either a metal material and/or a dielectric material.
  • the woven screen 24 can be fabricated from a 160, 100 and 30 mesh stainless steel square weave metal, having 20 micron, 52 micron and 303 micron wire respectively.
  • the woven screen 24 includes the dimensions, tolerances and structure that produce the thickness and cross-over
  • the volume factor of the screen 24 can be about 3% and less after being
  • the adhesive 18 is applied to the wire cross-over intersections 46 on a single side of the metal screens 12, 16.
  • printing methods such as a plate and roller method, can be employed to apply the adhesive 18.
  • multiple adhesive 18 coatings may be required.
  • the dielectric sheet 12 is adhered to the side of the metal screen 14 containing the adhesive 18.
  • the second metal screen 16 has adhesive 18 applied to the intersections 46 and is adhered to the dielectric sheet 12 opposite the first metal screen 14 in window registry, such that the first and second screens windows 48 are in
  • the sheet 12 and screens 14, 16 can be cut to any profile shape.
  • the dielectric sheet 12 material located in each window 48 is one of; removed if impermeable and left intact if porous.
  • the sheet material can be burned out by use of a hair dryer, blowtorch, a laser and the like.
  • the dielectric separator compressor 10 can be installed between electrodes.
  • the compressor 10 can be utilized to apply sufficient pressure to obtain an ultralow electrode resistance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Near-Field Transmission Systems (AREA)
  • Secondary Cells (AREA)

Abstract

A dielectric separator compressor includes a dielectric sheet having a first side and a second side opposite the first side. A first metal screen is coupled to the first side of the dielectric sheet and a second metal screen is coupled to the second side of the dielectric sheet.

Description

DIELECTRIC SEPARATOR COMPRESSOR
BACKGROUND
[0001] The present disclosure is directed to a
dielectric separator compressor for use in a secondary battery assembly.
[0002] A secondary battery is configured such that a cathode and an anode having an active material layer, which is formed by one of; coating an active material with a binder and laying a membrane containing active material on a collector, are connected via an electrolyte layer. The cathode and anode so connected are contained in a battery case .
[0003] In general, secondary batteries (electrochemical batteries) such as lithium ion secondary batteries include an electrode group comprising a positive electrode, a negative electrode and a separator for electrically
insulating the positive and negative electrodes from each other and for retaining electrolyte.
[0004] The separator functions to prevent a short- circuit between the positive and negative electrodes during normal operation so as to ensure safety of the battery.
SUMMARY
[0005] In accordance with the present disclosure, there is provided a dielectric separator compressor comprising a dielectric sheet having a first side and a second side opposite the first side. A first metal screen is coupled to the first side of the dielectric sheet; and a second metal screen is coupled to the second side of the dielectric sheet . [0006] In another and alternative embodiment, the dielectric separator compressor further comprises an adhesive applied between the first metal screen and the dielectric sheet and the adhesive is applied between the second metal screen and the dielectric sheet.
[0007] In another and alternative embodiment, the adhesive is applied to at least one cross-over intersection of each of the first metal screen and the second metal screen .
[0008] In another and alternative embodiment, the first metal screen and the second metal screen comprise a
plurality of windows, the windows being in window registry.
[0009] In another and alternative embodiment, the dielectric sheet comprises a dielectric material, having electrical insulating characteristics.
[0010] In another and alternative embodiment, the first metal screen and the second metal screen comprise a
stainless steel mesh material.
[0011] In another and alternative embodiment, the stainless steel mesh material comprises a 160, 100 and 30 mesh square weave metal screen.
[0012] In another and alternative embodiment, the dielectric sheet comprises a porous dielectric material, having electrical insulating characteristics.
[0013] In another and alternative embodiment, at least one of the first and second metal screen comprise one of a plurality of metal screens sintered to comprise a single screen with aligned window registry.
[0014] Other details of the dielectric separator
compressor are set forth in the following detailed
description and the accompanying drawing wherein like reference numerals depict like elements. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a fragmentary side view of an
exemplary dielectric separator compressor;
[0016] Figure 2 is a top plan view of an exemplary rigid compression screen;
[0017] Figure 3 is a top plan sectional view of the exemplary woven screen segment of the exemplary rigid compression screen.
DETAILED DESCRIPTION
[0018] Referring now to Figure 1, shows an exemplary dielectric separator compressor 10. The dielectric
separator compressor 10 comprises a dielectric sheet 12 between a first metal screen 14 and a second metal screen 16. An adhesive 18 couples the first metal screen 14 to an upper surface 20 of the dielectric sheet 12. Adhesive 18 also couples the second metal screen 16 to a lower surface 22 of the dielectric sheet 12. The first metal screen 14 and the second metal screen 16 are aligned in a window registry. In an exemplary embodiment each screen, 14, 16 may comprise one of; one and a plurality of metal screens sintered to comprise a single screen with aligned window registry .
[0019] The dielectric sheet 12 can comprise one of;
impermeable and porous plastic film made of any variety of dielectric materials. The sheet 12 can be a polyester film such as Bi-axially-oriented polyethylene terephthalate (BoPET) which has excellent properties of high tensile strength, chemical and dimensional stability and electrical insulation. Other materials include porous PTFE high density polyethylene (HDPE) , polyethylene (PE), polyimide (PI) and the like. The dielectric sheet 12 prevents the conduction of electrical current through the sheet.
[0020] Figure 2 shows a simplified schematic top plan view of the first metal screen 14 and second metal screen 16 in the form of a planar, rigid compression screen 24. The screen 24 defines locations for uncompressed sections between contiguous segments 28, 30, 32, 34 of the screen 24, wherein the contiguous segments 28, 30, 32, 34 are configured to be cooperatively positioned to define open areas 36. Contiguous segments 28, 30, 32, 34 are configured to be the raised pattern for the compressor 10. A
perimeter 38 of the screen 24 matches a perimeter (not shown) of the sheet 12.
[0021] Figure 3 shows a segment of the screen 24, which may also be referred to as a square weave cloth 24, that may be used to form a plurality of connecting areas 42 (shown in Figure 1) for a pellicle (not shown) that can be coupled to the dielectric separator compressor 10. Wherever strands 44 form cross-over intersections 46 the
intersections effectively form the connecting areas 42 that compress the galvanic pellicle against an electrically conductive surface of an electrode (not shown) . The woven screen 24 may also include a weave defining open squares (windows) 48 that make up greater than about 60% to about 75%, and preferably about 65%, of a projected window planar surface area defined by the woven screen 24. The open squares define the uncompressed sections (not shown) of the galvanic pellicle. Additionally, wire strands 44 making up the woven screen 24 may be made of materials either a metal material and/or a dielectric material.
[0022] The woven screen 24 can be fabricated from a 160, 100 and 30 mesh stainless steel square weave metal, having 20 micron, 52 micron and 303 micron wire respectively. The woven screen 24 includes the dimensions, tolerances and structure that produce the thickness and cross-over
intersections 46 with window 48 spacing that meet a criteria of less than 10% of an active membrane gets compressed in a cell structure. Also the volume factor of the screen 24 can be about 3% and less after being
assembled .
[0023] In assembling the dielectric separator compressor
10, the adhesive 18 is applied to the wire cross-over intersections 46 on a single side of the metal screens 12, 16. In an exemplary embodiment, printing methods, such as a plate and roller method, can be employed to apply the adhesive 18. In some cases, multiple adhesive 18 coatings may be required. The dielectric sheet 12 is adhered to the side of the metal screen 14 containing the adhesive 18. The second metal screen 16 has adhesive 18 applied to the intersections 46 and is adhered to the dielectric sheet 12 opposite the first metal screen 14 in window registry, such that the first and second screens windows 48 are in
alignment. This configuration forms a 3-layer sandwich of considerable strength. The sheet 12 and screens 14, 16 can be cut to any profile shape.
[0024] To finish the assembly, the dielectric sheet 12 material located in each window 48 is one of; removed if impermeable and left intact if porous. In an exemplary embodiment, the sheet material can be burned out by use of a hair dryer, blowtorch, a laser and the like.
[0025] The dielectric separator compressor 10 can be installed between electrodes. The compressor 10 can be utilized to apply sufficient pressure to obtain an ultralow electrode resistance. [0026] There has been provided a dielectric separator compressor. While the dielectric separator compressor has been described in the context of specific embodiments thereof, other unforeseen alternatives, modifications, and variations may become apparent to those skilled in the art having read the foregoing description. Accordingly, it is intended to embrace those alternatives, modifications, and variations which fall within the broad scope of the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A dielectric separator compressor comprising: a dielectric sheet having a first side and a second side opposite said first side;
a first metal screen coupled to said first side of said dielectric sheet; and
a second metal screen coupled to said second side of said dielectric sheet.
2. The dielectric separator compressor according to claim
1, further comprising:
an adhesive applied between said first metal screen and said dielectric sheet; and
said adhesive applied between said second metal screen and said dielectric sheet.
3. The dielectric separator compressor according to claim
2, wherein said adhesive is applied to at least one crossover intersection of each of said first metal screen and said second metal screen.
4. The dielectric separator compressor according to claim I , wherein said first metal screen and said second metal screen comprise a plurality of windows, said windows being in window registry.
5. The dielectric separator compressor according to claim I , wherein said dielectric sheet comprises a dielectric material, having electrical insulating characteristics.
6. The dielectric separator compressor according to claim 1, wherein said first metal screen and said second metal screen comprise a stainless steel mesh material.
7. The dielectric separator compressor according to claim
6, wherein said stainless steel mesh material comprises a mesh square weave metal screen.
8. The dielectric separator compressor according to claim
7, wherein said stainless steel mesh material comprises a 160, 100 and 30 mesh square weave metal screen
9. The dielectric separator compressor according to claim 4, wherein said dielectric sheet is removed from said plurality of windows.
10. The dielectric separator compressor according to claim 1, wherein said dielectric sheet comprises a porous dielectric material, having electrical insulating
characteristics .
11. The dielectric separator compressor according to claim 1, wherein at least one of said first metal screen and said second metal screen comprises one of a plurality of metal screens sintered to comprise a single screen with aligned window registry.
PCT/US2017/060278 2016-11-10 2017-11-07 Dielectric separator compressor WO2018089323A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/348,456 2016-11-10
US15/348,456 US20170062787A1 (en) 2014-12-03 2016-11-10 Dielectric separator compressor

Publications (2)

Publication Number Publication Date
WO2018089323A2 true WO2018089323A2 (en) 2018-05-17
WO2018089323A3 WO2018089323A3 (en) 2018-07-26

Family

ID=62109705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2017/060278 WO2018089323A2 (en) 2016-11-10 2017-11-07 Dielectric separator compressor

Country Status (1)

Country Link
WO (1) WO2018089323A2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI241732B (en) * 2002-09-25 2005-10-11 E I Du Pont Canada Company Mesh reinforced fuel cell separator plate
US9337474B1 (en) * 2010-05-20 2016-05-10 Halbert P. Fischel Electrodes for electrochemical cells
JP6270718B2 (en) * 2011-07-11 2018-01-31 カリフォルニア インスティチュート オブ テクノロジー Separator system and electrochemical cell for electrochemical systems
JP6045121B2 (en) * 2012-11-30 2016-12-14 エルジー・ケム・リミテッド Separation membrane for secondary battery including double porous coating layer of inorganic particles having different surface characteristics, secondary battery including the same, and method for producing separation membrane
US9508976B2 (en) * 2015-01-09 2016-11-29 Applied Materials, Inc. Battery separator with dielectric coating

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Publication number Publication date
WO2018089323A3 (en) 2018-07-26

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