GB1569787A - Tubes or pockets for battery active material - Google Patents

Tubes or pockets for battery active material Download PDF

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Publication number
GB1569787A
GB1569787A GB12385/77A GB1238577A GB1569787A GB 1569787 A GB1569787 A GB 1569787A GB 12385/77 A GB12385/77 A GB 12385/77A GB 1238577 A GB1238577 A GB 1238577A GB 1569787 A GB1569787 A GB 1569787A
Authority
GB
United Kingdom
Prior art keywords
threads
separator according
woven fabric
overlay
pockets
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB12385/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HAGEN AG G
Original Assignee
HAGEN AG G
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 HAGEN AG G filed Critical HAGEN AG G
Publication of GB1569787A publication Critical patent/GB1569787A/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/76—Containers for holding the active material, e.g. tubes, capsules
    • H01M4/765—Tubular type or pencil type electrodes; tubular or multitubular sheaths or covers of insulating material for said tubular-type electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Nonwoven Fabrics (AREA)
  • Secondary Cells (AREA)
  • Cell Separators (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Description

(54) TUBES OR POCKETS FOR BATTERY ACTIVE MATERIAL (71) We, CARL FREUDENBERG, a German Company (a Kommanditgesellschaft, the present personally responsible partners of which are Helmut Fabricius, Hans Erich Freudenberg, Otro Schildhauer, Hermann Freudenberg, Dieter Freudenberg, and Reinhart Freudenberg) of 6940 Weinheim Bergstrasse, Hohnerweg 2, West Germany and GOTT FRIED HAGEN AG, a German Company, of Postfach 91 0110, 50000 Cologne 91, West Germany, do hereby declare the invention, for which we pray that a patent may be granted to us and the method by which it is to be performed, to be particularly described in and by the following statement: Today, the positive plates of lead storage batteries are usually formed from a plurality of rods arranged side by side. These are surrounded by tubes of a textile material, and the necessary active material is put in between the rod and its respective tube. Since the volume of the active material changes with the state of charge of the battery, high demands are made on the mechanical strength of the tubes.
The tubes which are used may be separate or be in the form of tube-type pockets. The latter are more easily manufactured and assembled.
German Gebrauchsmuster No. 7425 370 described a tube-type pocket which is constructed from a non-woven fabric. Such pockets have the advantage that the individual fibres are randomly arranged. In this way the fibres form a kind of labyrinth which is effective as a barrier against solid particles of the active material, but which, on the other hand, does not effectively oppose the passage of ions. The use of tube-type pockets of nonwoven fabric consequently results in a battery with desirably low internal resistance. Nonwoven fabric pockets are relatively elastic, i.e.
they can adapt, in operation of the battery, to the varying volume of the active material.
For example, non-woven fabric pockets withstand the pressure occurring with the heaviest loads of short duration, when tubes of woven fabric, which are less elastic, have already burst. The elasticity of non-woven fabric tubetype pockets also allows the enclosed active material to remain loose and in this way ensures a good cell capacity, the effective surface area of the particles being high.
Non-woven fabric pockets, however, have the disadvantage that, in certain circumstances, the fabrics are not equal in the long run to the mechanical stress caused by the constant swelling and shrinkage of the active material in the tubes during charging and discharging.
This stress may cause loosening of the bonding of the fibre structure, and the resultant permanent expansion brings the risk of premature failure of the battery through sedimentation.
On account of this risk, woven tube-type pockets have been used. However, it has been necessary to accept the disadvantages that such pockets have poorer filtering properties than non-woven fabrics and that the internal resistance of batteries equipped in this way is comparatively high.
According to the present invention, a pocket suitable for the positive electrodes of lead storage batteries comprises two textile sheets which are held together by a plurality of parallel seams which divide the pocket into tubes, in which each textile sheet consists wholly of textile fibres other than glass fibres and comprises an electrolyte-resistant nonwoven fabric reinforced by a woven fabric or overlay consisting of electrolyte-resistant fibres.
The products of the invention may be prepared by covering a suitable non-woven fabric, on one side, with a woven textile fabric or overlay, suitably of polyester or polyvinyl chloride fibres. It is to be noted that the reinforcing effect proper is predominantly provided by the threads which extend transversely of the finished pocket, while the longitudinally extending threads have an auxiliary function. In the longitudinal direction, therefore, considerably thinner threads can be used than in the transverse direction. It is also possible to dispense with longitudinal threads if the transversely extending threads are worked directly into the non-woven fabric or are united with it by other known techniques.
The textile structure produced in this way is impregnated with a suitable bonding agent and dried. Two such bonded webs are then placed one on top of the other, preferably with the reinforcing layer on the outside, and are sewn together in the longitudinal direction along straight lines at equal intervals with a multi-needle sewing machine. The product can then be cut into pieces of suitable length.
Moulded rods are then inserted into the spaces between the seams and the non-woven fabric is heat shrunk onto the rods. At this stage, the bonding agent condenses out and the tube-type pocket is fixed in the desired shape.
It will be appreciated that a product of the invention may comprise only one textile sheet which is folded in the middle. Further, the seams may be formed with adhesive rather than by sewing.
Preferably, the woven fabric or overlay consists of monofilament threads, the ratio of the size or cross-section or cross-sectional area of the warp threads relative to that of the weft threads being of 1 : 1 to 1 : 100 and advantageously of 1 : 1 to 1 : 20. It is particularly desirable that, in the reinforcement, the threads are all at right angles to the axis of the tubes. The threads are preferably arranged regularly at a distance from one another which corresponds to there being from 0.5 to 5 threads per cm and usually from 1 to 3 threads per cm.
The strength of the or each textile sheet structure used in the invention should be such that a 5 cm wide strip shows a permanent stretch of between 1 and 30%, preferably between 1 and 10%, under a load of 200 Newtons.
The products of the invention have the advantages of fiexibilty associated with nonwoven pockets but the problem of sedimentation is minimised owing to the presence of the woven reinforcement.
WHAT WE CLAIM IS: 1. A battery separator in the form of a plurality of pockets, comprising one folded or two superposed bonded textile sheet structures, in which the opposing faces of the sheet or sheets are held together by a plurality of parallel seams, and in which the or each textile sheet structure consists wholly of textile fibres other than glass fibres and comprises an electrolyte-resistant non-woven fabric reinforced by a woven fabric or overlay of electrolyte-resistant fibres 2. A separator according to claim 1 in which the woven fabric or overlay comprises monofilament threads.
3. A separator according to claim 1 or claim 2 in which the ratio of the size of the warp threads to the weft threads is of 1 : 1 to 1 : 100.
4. A separator according to claim 3 in which the size ratio is 1 : 1 to 1 : 20.
5. A separator according to claim 1 or claim 2 in which the reinforcement consists only of threads extending at right angles to the axes of the tubes.
6. A separator according to any preceding claim in which the overlay or woven fabric comprises from 0.5 to 5 threads/cm in the warp or weft direction.
7. A separator according to claim 6 in which the overlay or woven material comprises from 1 to 3 threads/cm in the warp or weft direction.
8. A separator according to any preceding claim in which the or each textile sheet structure has a permanent stretch between 1 and 30% under a repeated load of 200 N/5 cm strip width.
9. A separator according to claim 1 substantially as herein described.
10. A storage battery comprising a plurality of rods and a battery separator according to any preceding claim, in which the rods are in the pockets of the separator.
11. A battery according to claim 10 in which the non-woven fabric of the separator has been shrunk onto the rods.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. are united with it by other known techniques. The textile structure produced in this way is impregnated with a suitable bonding agent and dried. Two such bonded webs are then placed one on top of the other, preferably with the reinforcing layer on the outside, and are sewn together in the longitudinal direction along straight lines at equal intervals with a multi-needle sewing machine. The product can then be cut into pieces of suitable length. Moulded rods are then inserted into the spaces between the seams and the non-woven fabric is heat shrunk onto the rods. At this stage, the bonding agent condenses out and the tube-type pocket is fixed in the desired shape. It will be appreciated that a product of the invention may comprise only one textile sheet which is folded in the middle. Further, the seams may be formed with adhesive rather than by sewing. Preferably, the woven fabric or overlay consists of monofilament threads, the ratio of the size or cross-section or cross-sectional area of the warp threads relative to that of the weft threads being of 1 : 1 to 1 : 100 and advantageously of 1 : 1 to 1 : 20. It is particularly desirable that, in the reinforcement, the threads are all at right angles to the axis of the tubes. The threads are preferably arranged regularly at a distance from one another which corresponds to there being from 0.5 to 5 threads per cm and usually from 1 to 3 threads per cm. The strength of the or each textile sheet structure used in the invention should be such that a 5 cm wide strip shows a permanent stretch of between 1 and 30%, preferably between 1 and 10%, under a load of 200 Newtons. The products of the invention have the advantages of fiexibilty associated with nonwoven pockets but the problem of sedimentation is minimised owing to the presence of the woven reinforcement. WHAT WE CLAIM IS:
1. A battery separator in the form of a plurality of pockets, comprising one folded or two superposed bonded textile sheet structures, in which the opposing faces of the sheet or sheets are held together by a plurality of parallel seams, and in which the or each textile sheet structure consists wholly of textile fibres other than glass fibres and comprises an electrolyte-resistant non-woven fabric reinforced by a woven fabric or overlay of electrolyte-resistant fibres
2. A separator according to claim 1 in which the woven fabric or overlay comprises monofilament threads.
3. A separator according to claim 1 or claim 2 in which the ratio of the size of the warp threads to the weft threads is of 1 : 1 to 1 : 100.
4. A separator according to claim 3 in which the size ratio is 1 : 1 to 1 : 20.
5. A separator according to claim 1 or claim 2 in which the reinforcement consists only of threads extending at right angles to the axes of the tubes.
6. A separator according to any preceding claim in which the overlay or woven fabric comprises from 0.5 to 5 threads/cm in the warp or weft direction.
7. A separator according to claim 6 in which the overlay or woven material comprises from 1 to 3 threads/cm in the warp or weft direction.
8. A separator according to any preceding claim in which the or each textile sheet structure has a permanent stretch between 1 and 30% under a repeated load of 200 N/5 cm strip width.
9. A separator according to claim 1 substantially as herein described.
10. A storage battery comprising a plurality of rods and a battery separator according to any preceding claim, in which the rods are in the pockets of the separator.
11. A battery according to claim 10 in which the non-woven fabric of the separator has been shrunk onto the rods.
GB12385/77A 1976-03-26 1977-03-24 Tubes or pockets for battery active material Expired GB1569787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2612863A DE2612863C2 (en) 1976-03-26 1976-03-26 Tube pocket for lead batteries

Publications (1)

Publication Number Publication Date
GB1569787A true GB1569787A (en) 1980-06-18

Family

ID=5973477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12385/77A Expired GB1569787A (en) 1976-03-26 1977-03-24 Tubes or pockets for battery active material

Country Status (6)

Country Link
JP (1) JPS52118222A (en)
DE (1) DE2612863C2 (en)
ES (1) ES456330A1 (en)
FR (1) FR2345818A1 (en)
GB (1) GB1569787A (en)
SE (1) SE7703384L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146289A (en) * 1983-08-26 1985-04-17 Sound Attenuators Ltd Improved acoustic attenuating material and method for making the same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7425570U (en) * 1974-11-07 Freudenberg C Tube pouches for lead batteries
BE564853A (en) * 1957-02-18
NL277147A (en) * 1961-04-19 1900-01-01
FR85179E (en) * 1964-01-31 1965-06-25 Chloride Batteries Ltd Plates for electric accumulators
DE1596074C3 (en) * 1966-01-07 1974-08-01 Fa. Carl Freudenberg, 6940 Weinheim Process for the production of tube-electrode-sheaths from acid- and oxidation-resistant fibers
DE1671869C3 (en) * 1967-09-27 1978-03-30 Olbo Textilwerke Gmbh, 5650 Solingen Device for the production of tubes for tube electrodes of electrical accumulators
AU409957B2 (en) * 1968-03-18 1970-12-30 Yuasa Battery Company Limited A porous tube for glass fiber tubular type storage battery plate and method of manufacturing thesame
BE794201A (en) * 1972-06-20 1973-07-18 Serengay Maggiorino DOUBLE WALL TUBES FOR POSITIVE PLATES OF LEADED ELECTRIC ACCUMULATORS
FR2220884A1 (en) * 1973-03-05 1974-10-04 Ouatin Electrical accumulator active material cover sheath - consisting of inner porous nonwoven fabric fixed to support fabric
GB1463484A (en) * 1973-07-03 1977-02-02 Electric Power Storage Ltd Manufacture of multitubular sheaths for electric battery plates of tubular type
DE7609323U1 (en) * 1976-03-26 1976-10-07 Fa. Carl Freudenberg, 6940 Weinheim PIPE BAG FOR LEAD ACCUMULATORS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2146289A (en) * 1983-08-26 1985-04-17 Sound Attenuators Ltd Improved acoustic attenuating material and method for making the same

Also Published As

Publication number Publication date
SE7703384L (en) 1977-09-27
FR2345818A1 (en) 1977-10-21
ES456330A1 (en) 1978-01-16
DE2612863C2 (en) 1986-05-07
DE2612863A1 (en) 1977-10-13
JPS52118222A (en) 1977-10-04
FR2345818B1 (en) 1982-11-05

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee