WO2001008243A1 - Separateur de batterie flexible - Google Patents

Separateur de batterie flexible Download PDF

Info

Publication number
WO2001008243A1
WO2001008243A1 PCT/GB2000/002755 GB0002755W WO0108243A1 WO 2001008243 A1 WO2001008243 A1 WO 2001008243A1 GB 0002755 W GB0002755 W GB 0002755W WO 0108243 A1 WO0108243 A1 WO 0108243A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
separator
edge portion
electrode plate
edge
Prior art date
Application number
PCT/GB2000/002755
Other languages
English (en)
Inventor
Robert Fairlee
Laurence Rothwell
Original Assignee
Oldham Crompton Batteries Limited
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
Application filed by Oldham Crompton Batteries Limited filed Critical Oldham Crompton Batteries Limited
Priority to AU61702/00A priority Critical patent/AU6170200A/en
Priority to EP00948133A priority patent/EP1200997A1/fr
Publication of WO2001008243A1 publication Critical patent/WO2001008243A1/fr

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
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H01M50/417—Polyolefins
    • 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
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/469—Separators, membranes or diaphragms characterised by their shape tubular or cylindrical
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M50/411—Organic material
    • 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
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This invention relates to a separator as used between positive and negative electrode plates in a battery cell.
  • Separators are commonly used in cells for the prevention of electrical shorts between the positive and negative electrodes which are often in the form of flat rectangular plates. Commonly these separators are in the form of sheets of semi-porous material which may be rigid or flexible that allow the passage of electrolyte and electric current but prevent the active materials of the electrodes coming into contact and causing a short circuit.
  • the conversion of separator material into a tube ensures absolute edge protection but is in itself an additional manufacturing process and therefore adds costs to manufacture.
  • the resultant tube if it is to be made from the minimum amount of material, will be a tight fit on the electrode and therefore be difficult to locate. Making the tube a loose fit requires the use of more material and may make it difficult to insulate the group of electrodes into the cell box.
  • the separator sheet may have flat major surfaces or have projections on at least one of the major surfaces.
  • the edge portions may have projections e g ribs or undulations, which have the effect of increasing the path length between electrodes of opposite polarity between which the separator is sandwiched in use.
  • the edge portions may each be thinner than the central and remainder of the side parts of the sheet, whereby when one edge portion overlaps the other edge portion the total thickness of the two edge portions is equal to or approximately equal to the thickness of the central and/or the remainder of the side parts.
  • the separator may have the plurality of projections in the form of spaced apart ribs or undulations on one or both main surfaces.
  • the two edge portions may be held in place by being sandwiched between two adjacent electrodes.
  • the overall width of an electrode plate is increased by the thickness of the sheet at each edge of the plate.
  • the electrode plates are arranged alternately e g positive, negative, positive, negative, positive, etc in a group.
  • a group comprises six positive electrode plates and seven negative electrode plates, but other numbers may be used depending on the battery performance required.
  • the electrode plate of one polarity e g the positive electrodes only are each wrapped in a separator sheet, but the electrodes of both polarities may be wrapped.
  • Figure 1 shows the end view of a right-hand part of a separator in accordance with the invention
  • Figure 2 shows the end view of a left-hand part of the separator shown in Figure 1
  • Figure 3 shows an end view of a positive electrode plate and of the separator shown in Figures 1 and 2 on a smaller scale being wrapped around the plate
  • Figure 4 shows an end view of part of a positive electrode plate and part of a negative electrode plate, with the two edge portions in overlapping arrangement, the separator having been wrapped around the positive electrode plate.
  • Separator sheet material is provided in the form of a long length, often in the form of a roll, from which shorter pieces may be cut, the length of each piece being slightly longer than the length (height) of an electrode plate.
  • the width of the separator 1 of this embodiment is 412 mm for wrapping around a positive electrode 2 having a width W of 174.6 mm plus semi-circular side edges 3 and a thickness T of 9.8 mm.
  • the separator has a central part P alongside which two intermediate parts l R and l
  • the lower main surface 4 of the separator 1 is formed with a plurality of regularly spaced apart small ribs 5 which extend lengthwise of the long length of sheet material from which the individual pieces abut. These small ribs 5 are all 0.14 mm high and are spaced apart by a distance of 1 mm. The small ribs 5 are located across the whole width of the separator except in one edge region EL, shown at the left-hand side of Figures 2 and 3.
  • the upper surface 8 of the separator is devoid of any ribs or other projections in its edge portion E L .
  • the thickness of the sheet material (without taking the ribs into account) is 0.3 mm over a distance 13 mm measured from the extremity 9 of the edge portion EL and increases steadily to a thickness of 0.55 mm.
  • the other edge portion ER (on the right-hand side of Figures 1 and 3) has, as stated above, small ribs 5 on its lower surface and, on its upper surface, six larger ribs 7 having the same spacings and dimensions as the six larger ribs on the lower surface of the left-hand edge portion E .
  • the thickness of the sheet is 0.3 mm for a distance of 14 mm inwards from the right-hand extremity 10 i e up to a fifth rib.
  • the thickness of the sheet is 0.4 mm between the fifth and sixth ribs and 0.5 mm between the sixth and seventh ribs.
  • the remaining sections of the two side parts S and S R are each 78.0 mm wide, and have on the upper surfaces twenty-seven ribs 11 each 1.30 mm high, 0.432 wide at their upper extremities and spaced apart by a distance of 3.0 mm (measured from the centre of one rib 11 to the centre of the next rib).
  • the two intermediate parts IR and l are both 21 mm wide and devoid of any ribs, undulations or other projections on the upper surface 12.
  • the separator sheet 1 as described is folded around a positive electrode 2 plate as illustrated in Figures 3 and 4.
  • the upper surface 14 of the central part P is placed against the lower surface 15 of the electrode plate 2 in the direction of arrows A.
  • the left-hand side part S L is then folded around the left-hand edge of the electrode plate in the direction of arrow B so the upper surface (now lower) lies against the upper surface 16 of the plate.
  • the right-hand side part S R is then folded around the right-hand edge of the electrode plate so that the upper surface of the separator (now lower) lies against the upper surface 16 of the plate 2, but with the right-hand edge portion E R of the separator overlapping the left-hand edge portion E L .
  • a negative plate 17 is placed against the overlapping edge portions EL and E R so they are held in the positions shown in Figure 4 with the larger ribs of one portion positioned between the larger ribs of the other portions. Further, because the edge portions have the dimensions as described above, the overlapping portions together have a total thickness approximately equal to the overall thickness of the remaining sections of the side parts S r and S .
  • the overall thickness of the separator at the edge of the plate is minimised.
  • a stack of negative electrode plates, a stack of positive electrode plates and a roll of separator sheet material is provided.
  • a piece of separator material of the required length is cut from the roll, placed on a negative electrode plate with the smaller ribs in the central part P against the upper surface of the plate.
  • a positive electrode is then placed centrally onto the separator sheet and the side part S with the edge portion EL having the smaller ribs on its lower surface folded over onto the upper surface of the positive plate.
  • the other side part SR of the separator is then folded over onto the upper surface of the positive plate so an overlap as shown in Figure 4 is formed.
  • the negative plates are joined together and the positive plates are joined together e g by welding, and construction of the cell completed by any one of the methods known in the industry.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cell Separators (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un séparateur utilisé entre des plaques d'électrode négative et positive. Ce séparateur comprend une feuille de matériau flexible qu'on peut enrouler autour d'une plaque d'électrode, une partie centrale de cette feuille étant en contact avec une surface principale de cette plaque d'électrode et deux parties latérales de cette feuille étant situées le long de l'autre surface principale de cette plaque d'électrode. Chaque partie latérale possède un bord, et le bord d'une partie latérale chevauche le bord de l'autre partie latérale lorsque cette feuille est enroulée autour de la plaque d'électrode. La taille de ces deux bords est suffisante pour empêcher la survenue d'un court circuit électrique en cours d'utilisation.
PCT/GB2000/002755 1999-07-23 2000-07-21 Separateur de batterie flexible WO2001008243A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU61702/00A AU6170200A (en) 1999-07-23 2000-07-21 Flexible battery separator
EP00948133A EP1200997A1 (fr) 1999-07-23 2000-07-21 Separateur de batterie flexible

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9917205.8 1999-07-23
GB9917205A GB2352556A (en) 1999-07-23 1999-07-23 Separator

Publications (1)

Publication Number Publication Date
WO2001008243A1 true WO2001008243A1 (fr) 2001-02-01

Family

ID=10857731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/002755 WO2001008243A1 (fr) 1999-07-23 2000-07-21 Separateur de batterie flexible

Country Status (4)

Country Link
EP (1) EP1200997A1 (fr)
AU (1) AU6170200A (fr)
GB (1) GB2352556A (fr)
WO (1) WO2001008243A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1617496A1 (fr) * 2004-07-14 2006-01-18 Amer-Sil S.A. Procédé pour la préparation d'empilage d'une électrode de la contreplaque
CN1321332C (zh) * 2005-04-30 2007-06-13 霍永峰 柱面镜组元及制作方法、背投影屏幕和背投影电视

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2088118A (en) * 1980-11-21 1982-06-03 Oldham Batteries Ltd Improvements in or relating to the manufacture of electric batteries
JPS5792749A (en) * 1980-12-02 1982-06-09 Matsushita Electric Ind Co Ltd Manufacture of sack-like separator for battery
JPS57103262A (en) * 1980-12-19 1982-06-26 Matsushita Electric Ind Co Ltd Separator for lead storage battery and its manufacturing method
JPH0374048A (ja) * 1989-08-11 1991-03-28 Sanyo Electric Co Ltd 角形電池
EP0899801A1 (fr) * 1997-08-26 1999-03-03 General Motors Corporation Séparateur de batterie à bords résistants à la perforation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418464A (en) * 1980-07-31 1983-12-06 General Battery Corporation Wrapping apparatus for industrial battery plates
US4680242A (en) * 1985-06-24 1987-07-14 Fremont Special Machine Company, Inc. Wrapped battery plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2088118A (en) * 1980-11-21 1982-06-03 Oldham Batteries Ltd Improvements in or relating to the manufacture of electric batteries
JPS5792749A (en) * 1980-12-02 1982-06-09 Matsushita Electric Ind Co Ltd Manufacture of sack-like separator for battery
JPS57103262A (en) * 1980-12-19 1982-06-26 Matsushita Electric Ind Co Ltd Separator for lead storage battery and its manufacturing method
JPH0374048A (ja) * 1989-08-11 1991-03-28 Sanyo Electric Co Ltd 角形電池
EP0899801A1 (fr) * 1997-08-26 1999-03-03 General Motors Corporation Séparateur de batterie à bords résistants à la perforation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 176 (E - 130) 10 September 1982 (1982-09-10) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 189 (E - 133) 28 September 1982 (1982-09-28) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 240 (E - 1079) 20 June 1991 (1991-06-20) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1617496A1 (fr) * 2004-07-14 2006-01-18 Amer-Sil S.A. Procédé pour la préparation d'empilage d'une électrode de la contreplaque
CN1321332C (zh) * 2005-04-30 2007-06-13 霍永峰 柱面镜组元及制作方法、背投影屏幕和背投影电视

Also Published As

Publication number Publication date
GB9917205D0 (en) 1999-09-22
GB2352556A (en) 2001-01-31
AU6170200A (en) 2001-02-13
EP1200997A1 (fr) 2002-05-02

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