GB2178222A - Dismountable gas-tight and liquid-tight terminal bushing for a voltaic cell or battery - Google Patents
Dismountable gas-tight and liquid-tight terminal bushing for a voltaic cell or battery Download PDFInfo
- Publication number
- GB2178222A GB2178222A GB08614190A GB8614190A GB2178222A GB 2178222 A GB2178222 A GB 2178222A GB 08614190 A GB08614190 A GB 08614190A GB 8614190 A GB8614190 A GB 8614190A GB 2178222 A GB2178222 A GB 2178222A
- Authority
- GB
- United Kingdom
- Prior art keywords
- necking
- bolt
- tight
- washer
- terminal bushing
- 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.)
- Granted
Links
- 210000004027 cell Anatomy 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000011810 insulating material Substances 0.000 claims abstract description 6
- 210000002421 cell wall Anatomy 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000003566 sealing material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A gas-tight and liquid-tight terminal bushing is described. The sealing effect is achieved by means of a toroidal sealing ring (O-ring) 5 which is pressed into the annular space formed by a necking 3 of the cell housing and the lead-through terminal bolt 10. The necking 3 is supported by a washer 6 made of insulating material, with an annular elevation surrounding the necking positively on the outside, the washer at the same time ensuring that the terminal bolt 10 is centred. On the other side of the cell wall, there is, again, a washer made of insulating material, which for further centering is provided with a sleeve-shaped projection which penetrates into the annular space formed by the necking and the bolt and which is supported on the bolt and on the necking. <IMAGE>
Description
SPECIFICATION
Dismountable gas-tight and liquid-tight terminal bushing for a voltaic cell or battery
The invention relates to a gas-tight and liquidtight terminal bushing for a voltaic cell or battery. Gas-tight, pressure-tight current-carrying bushings are required wherever an electrical current conductor has to be led through a metal wall and the wall is exposed to a pressure difference. In particular, current-carrying bushings of this type are needed for the cells of maintenance-free rechargeable nickel/cadmium batteries or hydrogen cells, for example nickel/hydrogen cells. In such cells, the active cell parts are surrounded by a leak-proof metal housing containing hydrogen gas under a presssure of up to 50 bars. Since the service life of cells of this type should be several years, the current-carrying bushings must have an extremely low leakage rate.
In general, a current-carrying bushing of an outer metal sleeve connected hermetically to the container, an inner metal conductor ensuring current conduction and an insulating material arranged between the sleeve and the conductor is known. German Offenlegungsschrift 2,849,326 describes a terminal bushing, in which the interspace between the wall of the battery housing or a necking of the battery housing and the terminal bolt is filled with an insulating material which is compressed in the interspace by means of two outer washers in the manner of a stuffing-box packing and which thus ensures sealing as a result of the radial forces induced in it.The main disadvantage of this type of sealing is that, because of the high radial forces, a relatively simple necking in a moderately thin sheet-metal housing does not have the necessary strength, so that either relatively large material thickness of welding-on, reinforced metal sleeves have to be used.
The present invention seeks therefore, to provide a terminal bushing which can be assembied simply, in which no reinforcements are needed in the region of the terminal bushing even when the cell housing has only a small wall thickness, and which ensures reliable centring of the terminal bolt in the bushing.
According to the present invention there is provided a dismountable gas-tight and liquidtight terminal bushing for a voltaic cell or battery, consisting of a metal bolt for current conduction and of an elastically deformable sealing material located in an annular space between the bolt and a necking of the battery housing, and also with two washers made of insulating material, which are arranged to fit on the bolt on each side of the cell wall, and of which one is supported on a collar of the bolt and the other on a nut screwed onto the bolt, wherein one washer is provided with an annular elevation surrounding the necking positively on the outside, and the sealing material located in a gap between the two washers is a toroidal sealing ring.
Thus, the cell housing is provided with a necking, and the interspace between the necking and the inserted terminal bolt is sealed off by means of a toroidal sealing ring made of leak-proof material. The terminal bushing also has two washers, of which one is supported, on a collar of the bolt and the other is supported on a nut screwed on the bolt. One washer is provided with an annular elevation which surrounds the necking positively on the outside and which on the one hand serves to support the necking against forces exerted outwards and on the other hand fixes the terminal bolt in the orifice.The other washer can be smooth, but is preferably provided with a sleeve-shaped projection which penetrates into the annular gap formed by the bolt and necking and which is supported radially by the bolts and on the necking, thus ensuring further improved centring on the terminal bolt in the orifice and an improved fixing of the sealing ring in position.
A current-carrying bushing according to a preferred embodiment of the invention will now be described by way of example with reference to the drawing, in which:
Figure 1 shows a section through a currentcarrying bushing,
Figure 2 shows a part view of a cell in the region of the bushing, and
Figure 3 shows a view of a complete cell, with a part longitudinal section.
Fig. 1 shows a cut-out from a tank wall 1, in which the current-carrying terminal bushing is embedded. The tank wall 1 is provided, in the region of the terminal bushing, with a necking (passage) 3 formed by a flange facing upwards. Sealing between the terminal bolt and the necking is obtained by means of the pressed-in elastomer sealing ring 5. This elastomer sealing ring 5 is a toroidal sealing ring (ring) which consists of a material having low permeability relative to gases and liquids.
Suitable materials are, for example, vulcanised rubber, styrene-butadiene copolymers, acrylonitrile-butadiene copolymers, butyl rubber, chloroprene rubber, sulphochlorinated polyethylene, silicon rubber, etc. The annular space formed between the necking 3 and a terminal bolt 10 and carrying the sealing ring 5 is closed off at the top and bottom by two washers 6 and 7 arranged to fit on the bolt 10. The washer 6 is provided with an elevation which surrounds the inwardly turned flange of the necking positively on the outside and which on the one hand supports the necking 3 on its outside and on the other hand ensures that the terminal bolt is centred in the bushing. It is preferable, here, if the elevation surrounds the necking up to the container wall and can be supported on the container wall.This prevents the possibility of the washer 6 being damaged by the necking 3, since, if the washers are gripped too hard, the necking 3 can act like a cup support.
The washer 7 is supported on the housing from the outer side of the housing. Preferably, the washer 7 is provided with a sleeve-shaped projection 12 which penetrates into the annular gap formed by the bolt 10 and necking 3 and is supported on the bolt and on the necking 3 and which thereby ensures improved guidance and centring of the bolt in the bushing.
The washers 7 and 6 are made of an electrically insulating, dimensionally stable material resistant to the electrolyte, the latter being necessary especially for the washer 6. Depending on the electrolyte used (acid, alkaline or non-aqueous), for example phenol-formaldehyde resins, some polyamides, melamine resins, polyesters, polystyrenes, polysulphones, polyolefins or polyoximethylenes are suitable as a dimensionally stable material. The two washers 7 and 6 are gripped axially by means of a nut 9 and collar 8. To protect the washers 6 and 7, metal shims 11 and 11' are also arranged respectively between the screw 9 and washer 7 and the collar 8 and the washer 6. If cyclic tank expansions are to be expected because of relatively high pressure fluctations in the cell, the shims 11 and 11' are preferably designed as cup springs.It does not need to be pointed out particularly that, of course, the terminal bolt should not have any thread in the sealing region. The necking is directed inwards, since this makes it easier to fit the sealing ring and reduces the overall height of the cell. The length of the necking is 0.4 to 0.8 times the bolt diameter.
Fig. 2 shows a part view of the exterior of a battery cell in in the region of the bushing.
The convex cover 1 of the battery cell is provided with a curved-out bulge 2 which carries the bushing. The terminal bolt 10, the upper washer 7 and the shim 11 can be seen. The nut 9 is provided with a cylindrical outer surface to prevent it from being unscrewed (slackened) in an indeterminate or undesirable way.
Fig. 3 shows a view of a complete cell, with a part longitudinal section. The two washers 307 and 306 are pressed against the container wall 301 by means of a nut 309 and a collar 308, a shim 311 also being arranged between the nut 309 and the washer 307. The washer 306 surrounds the collar 303. The seal 305 is arranged between the collar 303 and the terminal bolt. The washer 306 is designed as an elongate sleeve and at its bottom end serves at the same time to support an end plate 312 of a cell stack 313 which is fastened on the continuous terminal bolt. A particularly favourable and simple fastening of the cell stack can be achieved in this way.
The leak-proofing of the bushing which can be obtained is excellent, and the bushing can be assembled very simply and requires only an extremely small amount of space. It is also especially remarkable that there is no need for reinforcements of the cell housing in the region of the bushing.
Claims (5)
1. A dismountable gas-tight and liquid-tight terminal bushing for a voltaic cell or battery, consisting of a metal bolt for current conduction and of an elastically deformable sealing material located in an annular space between the bolt and a necking of the battery housing, and also with two washers made of insulating material, which are arranged to fit on the bolt on each side of the cell wall, and of which one is supported on a collar of the bolt and the other on a nut screwed onto the bolt, wherein one washer is provided with an annular elevation surrounding the necking positively on the outside, and the sealing material located in a gap between the two washers is a toroidal sealing ring.
2. A terminal bushing according to claim 1, wherein the length of the necking is 0.4 to 0.8 times the bolt diameter.
3. A terminal bushing according to claim 1 or 2, wherein the elevation surrounding the necking and provided on one washer surrounds the necking up to the container wall.
4. A terminal bushing according to claim 1, 2 or 3 wherein the said other washer is provided with a sleeve-shaped projection which penetrates into the annular gap formed by the bolt and the necking and which is supported on the bolt and on the necking.
5. A dismountable gas-tight and liquid-tight terminal bushing substantially as described herein with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853520851 DE3520851A1 (en) | 1985-06-11 | 1985-06-11 | DISASSEMBLABLE GAS AND LIQUID-TIGHT POLD COUPLING FOR A GALVANIC CELL OR BATTERY |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8614190D0 GB8614190D0 (en) | 1986-07-16 |
| GB2178222A true GB2178222A (en) | 1987-02-04 |
| GB2178222B GB2178222B (en) | 1988-09-14 |
Family
ID=6272946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08614190A Expired GB2178222B (en) | 1985-06-11 | 1986-06-11 | Dismountable gas-tight and liquid-tight terminal bushing for a voltaic cell or battery |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3520851A1 (en) |
| FR (1) | FR2587545B1 (en) |
| GB (1) | GB2178222B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2190684A1 (en) * | 1998-12-23 | 2003-08-01 | Peter Ling | Terminal seal for electrolytic devices |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4883729A (en) * | 1988-05-02 | 1989-11-28 | Gates Energy Product, Inc. | Battery terminal locking assembly |
| JP3366533B2 (en) * | 1996-09-26 | 2003-01-14 | 松下電器産業株式会社 | Sealed secondary battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3821029A (en) * | 1969-10-02 | 1974-06-28 | Chloride Batteries Au Ltd | Battery and intercell connector |
| GB2086128A (en) * | 1980-09-29 | 1982-05-06 | Gen Electric | Improved Terminal Apparatus for Electrolytic Device and Method of Manufacture |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1371092A (en) * | 1919-07-08 | 1921-03-08 | Philadelphia Storage Battery | Battery-sealing means |
| FR525199A (en) * | 1920-09-28 | 1921-09-16 | Accumulateurs Fixes | Cable gland for accumulators |
| FR555738A (en) * | 1922-09-06 | 1923-07-05 | Accumulateurs Fixes | Cable gland for battery terminals |
| GB564077A (en) * | 1943-04-28 | 1944-09-12 | Britannia Batteries Ltd | Improvements in alkaline electric batteries or accumulators |
| GB585302A (en) * | 1945-02-16 | 1947-02-04 | Britannia Batteries Ltd | Improvements in alkaline electric batteries or accumulators |
| GB1220987A (en) * | 1968-04-29 | 1971-01-27 | Alkaline Batteries Ltd | Sealed joints in storage batteries |
| US3488227A (en) * | 1968-06-03 | 1970-01-06 | Gen Electric | Hermetic seal closure for an electrochemical cell |
| FR2282586A1 (en) * | 1974-08-19 | 1976-03-19 | Varta Batterie | SEALING DEVICE FOR GALVANIC ELEMENT TERMINALS |
| GB1547089A (en) * | 1977-03-02 | 1979-06-06 | Chloride Group Ltd | Battery terminals |
| DE2757568C2 (en) * | 1977-12-23 | 1986-05-15 | Varta Batterie Ag, 3000 Hannover | Electric accumulator |
| DE2849326A1 (en) * | 1978-11-14 | 1980-05-29 | Deutsche Automobilgesellsch | DISASSEMBLABLE, GAS-TIGHT AND PRESSURE-RESISTANT ELECTRICITY |
-
1985
- 1985-06-11 DE DE19853520851 patent/DE3520851A1/en active Granted
-
1986
- 1986-06-10 FR FR868608382A patent/FR2587545B1/en not_active Expired - Fee Related
- 1986-06-11 GB GB08614190A patent/GB2178222B/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3821029A (en) * | 1969-10-02 | 1974-06-28 | Chloride Batteries Au Ltd | Battery and intercell connector |
| GB2086128A (en) * | 1980-09-29 | 1982-05-06 | Gen Electric | Improved Terminal Apparatus for Electrolytic Device and Method of Manufacture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2190684A1 (en) * | 1998-12-23 | 2003-08-01 | Peter Ling | Terminal seal for electrolytic devices |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2587545B1 (en) | 1994-03-04 |
| DE3520851A1 (en) | 1986-12-11 |
| GB8614190D0 (en) | 1986-07-16 |
| GB2178222B (en) | 1988-09-14 |
| FR2587545A1 (en) | 1987-03-20 |
| DE3520851C2 (en) | 1988-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960611 |