CA1067147A - Pole bolt seal for storage batteries - Google Patents
Pole bolt seal for storage batteriesInfo
- Publication number
- CA1067147A CA1067147A CA257,360A CA257360A CA1067147A CA 1067147 A CA1067147 A CA 1067147A CA 257360 A CA257360 A CA 257360A CA 1067147 A CA1067147 A CA 1067147A
- Authority
- CA
- Canada
- Prior art keywords
- storage battery
- shaft
- cover
- electric storage
- shrunk
- 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
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/4911—Electric battery cell making including sealing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The pole bolt protruding through the corer aperture is surrounded by a section of shrink tubing. Adhesive is provided between bolt and tubing.
A cap is placed over the bolt resting on the upper edge of the aperture, and a cast body fills the space between cap and shrink tubing.
The pole bolt protruding through the corer aperture is surrounded by a section of shrink tubing. Adhesive is provided between bolt and tubing.
A cap is placed over the bolt resting on the upper edge of the aperture, and a cast body fills the space between cap and shrink tubing.
Description
67~47 The invention relates to electric storage batteries and particularly to lead storage batteries having pole bolts protruding through the cover.
Lead storage batteries, particularly for fixed station and vehicle use, generally have a case of synthetic plastic and a cover also of thermo-- plastic synthetic material which is welded to the case. The lead terminals protrude through the cover and are connected with the pole bridges inside the cell.
Termiral lead-throughs are known in a wide variety of forms. For example, it is known to provide vertical and transverse holes in the lead ter- -minal and to fill these with a plastic material of synthetic plastic, so that `
the lower half of the terminal, in the gap between the pole bolt shaft and the wall of the cover aperture~ is surrounded by extruded synthetic material.
Particularly in comparatively large storage batteries, the pole bolts ~ -are, in most cases, brought out through the cell cover via rubber seals. The lead-through area is sealed off by greater or lesser tightening of a cover nut which compresses the sealing rings. The seal itself then becomes independent of the flow characteristics of the material constituting the sealing rings.
Due to the high seepage ability of the electrolyte, reliable sealing cannot be maintained, especially over long storage periods.
In other variants, the cover nut is provided with a fluting of swal-lowtail shape on its sealing side, so that the sealing material is also sub-jected to diagonal forces. Such seals are initially effective. However, since the sealing material is heavily stressed by the point loading, they quickly loosen. Such sealing arrangements must therefore be constantly tested and readjusted. It also is known to lead the pole bolt out through the cover aper-ture and to position between cover aperture and the outer wall of the pole bolt a sealing ring which consists of soft rubber. An insert is then cast into the recess formed by the cover aperture, which consists of bitumen or of a syn-thetic plastic. Since heat expansion during battery operation and pressure or ,' 1 ~
` 1067147 `
.: ..
shock acting upon the storage battery cause the shaft of the pole bolt to be in constant movement, such arrangements are also not capable of providing a -trouble-free seal.
Accordingly, it is an object of the inventionto provide a sealing arrangement, particularly for lead storage batteries, which retains sufficient tightness especially after long periods of usage and which also protects the .
; pole bolt against corrosion.
According to the invention, there is provided an electric storage battery is provided with one or more terminal assemblies sealed to the battery cover, the or each terminal assembly comprising a shaft which extends through a hole in the cover and on to which a flexible tube has been heat-shrunk and a cap which fits around the shaft and ; rests on a portion of the cover surrounding the hole so as to define an annular space between the shaft with the shrunk-on flexible tube, the ,, :
cover, and the cap, the annular space being filled with a sealing compound, and the terminal assembly further comprising a gasket which fits around :
the shrunk-on flexible tube surrounding the shaft and abuts the hole in - the cover.
.
~ ~;
7''' For further details, reference is made to the discussion which ~ 20 follows, in the light of the accompanying drawing which shows an elevation, , . . .
partly m cross-sectlon, of an embodiment of the mvention.
In the drawing, pole bolt shaft 4 is provided with the shrink tubing section 1 according to the invention before cover 7 is applied. In -~ preparation for this, pole bolt shaft 4 is treated to remove lead oxides.
~; This may be accomplished by sanding the entire length of this pole bolt . . .
shaft with a mixture of very fine sand and water, to remove the casting skin. The subsequent processing should be preformed as quickly as practical thereafter, to avoid the formation of oxides. The pole bolt shaft is then coated with sealing material 8. Alternately, a separate process is used to - 30 pre-coat the inside of shrink tubing section 1 with the sealing material before being applied to shaft 4. The pole bolt 4 is then raised to an : ' ~ $ 2 B - -~067147 appropriate temperature and shrink tubing section 1, coated on its inside with an adhesive or sealing material 8, is slipped over pole bolt shaft 4 and uniformly shrunk so that it adheres evenly while the sealing material .
8, which is preferably a hot melt adhesive, visibly -.
. ::
' .
.~ ' ;- .
,. ~ ` ~,'' ~';~,' , .
''"'.:
.' ~ ~' ,:
:, .
. ' :
',:' , ' ~
, ..
-: B -2a- ~
1067~47 .. ` -emerges from its endsO To this end, shrink tubing 1 is shrunk by conventional techniques, eOgO, by use of a hot air blower or an infrared radiatorO For this purpose the temperature of the pole bolt is desirably raised to the -range of about 120 to 140C, about 110C being the lower limitO After cooling has taken place, lid 7 is appliedO Pole bolt shaft 4 then protrudes through sealing ring 2 in cover 7 having cover aperture 3O
The shrink tubing then has a bonding agent 10 brushed onto it.
This agent may be of any suitable, conventional type, preferably dissolved in a solvent such as toluol or polyisobutylene. Thereafter, a cap 9, pre-,......... .
ferably of synthetic material, is so slipped over pole bolt shaft 4 that its lower portion rests tightly upon the upper edge of cell cover 7. Thereafter a casting material 5 is introduced into the hollow between the inner wall , of synthetic cap 9 and the outer wall of shrink tubing section 1 through an , . . .
opening 6 provided in the cap. The casting material 5 is desirably a thixo-tropic mass, preferably a self-hardening two-component polyurethane casting materialO The shrink tubing section may consist of modified wetted poly-olefin and cap 9 of polystyrol.
The particular advantage of an arrangement in accordance with the invention lies in that the sealant-coated shrink tubing seals off the ~ ;
microscopic chamlels, pores, etcO which are always unavoidably present on ; the surface of the lead (especially pure lead) along the entire length of the pole shaft so that the critical sealing zone lies within the electrolyte . .
(sulfuric acid). In this way, the terminal is protected from the corrosive oxygen-acid mixtureO The sealing itself is provided by the sealing ring positioned in the cover in cooperation with the casting enclosed by the capO
By applying bonding agent to the outside of the shrink tubing, especially good adhesion of the casting to the shrink tubing is achieved. Such good ~: .
adhesion is necessary because it is this casting which anchors the plate ; stack against small vertical shocks.
, .
: ;
Lead storage batteries, particularly for fixed station and vehicle use, generally have a case of synthetic plastic and a cover also of thermo-- plastic synthetic material which is welded to the case. The lead terminals protrude through the cover and are connected with the pole bridges inside the cell.
Termiral lead-throughs are known in a wide variety of forms. For example, it is known to provide vertical and transverse holes in the lead ter- -minal and to fill these with a plastic material of synthetic plastic, so that `
the lower half of the terminal, in the gap between the pole bolt shaft and the wall of the cover aperture~ is surrounded by extruded synthetic material.
Particularly in comparatively large storage batteries, the pole bolts ~ -are, in most cases, brought out through the cell cover via rubber seals. The lead-through area is sealed off by greater or lesser tightening of a cover nut which compresses the sealing rings. The seal itself then becomes independent of the flow characteristics of the material constituting the sealing rings.
Due to the high seepage ability of the electrolyte, reliable sealing cannot be maintained, especially over long storage periods.
In other variants, the cover nut is provided with a fluting of swal-lowtail shape on its sealing side, so that the sealing material is also sub-jected to diagonal forces. Such seals are initially effective. However, since the sealing material is heavily stressed by the point loading, they quickly loosen. Such sealing arrangements must therefore be constantly tested and readjusted. It also is known to lead the pole bolt out through the cover aper-ture and to position between cover aperture and the outer wall of the pole bolt a sealing ring which consists of soft rubber. An insert is then cast into the recess formed by the cover aperture, which consists of bitumen or of a syn-thetic plastic. Since heat expansion during battery operation and pressure or ,' 1 ~
` 1067147 `
.: ..
shock acting upon the storage battery cause the shaft of the pole bolt to be in constant movement, such arrangements are also not capable of providing a -trouble-free seal.
Accordingly, it is an object of the inventionto provide a sealing arrangement, particularly for lead storage batteries, which retains sufficient tightness especially after long periods of usage and which also protects the .
; pole bolt against corrosion.
According to the invention, there is provided an electric storage battery is provided with one or more terminal assemblies sealed to the battery cover, the or each terminal assembly comprising a shaft which extends through a hole in the cover and on to which a flexible tube has been heat-shrunk and a cap which fits around the shaft and ; rests on a portion of the cover surrounding the hole so as to define an annular space between the shaft with the shrunk-on flexible tube, the ,, :
cover, and the cap, the annular space being filled with a sealing compound, and the terminal assembly further comprising a gasket which fits around :
the shrunk-on flexible tube surrounding the shaft and abuts the hole in - the cover.
.
~ ~;
7''' For further details, reference is made to the discussion which ~ 20 follows, in the light of the accompanying drawing which shows an elevation, , . . .
partly m cross-sectlon, of an embodiment of the mvention.
In the drawing, pole bolt shaft 4 is provided with the shrink tubing section 1 according to the invention before cover 7 is applied. In -~ preparation for this, pole bolt shaft 4 is treated to remove lead oxides.
~; This may be accomplished by sanding the entire length of this pole bolt . . .
shaft with a mixture of very fine sand and water, to remove the casting skin. The subsequent processing should be preformed as quickly as practical thereafter, to avoid the formation of oxides. The pole bolt shaft is then coated with sealing material 8. Alternately, a separate process is used to - 30 pre-coat the inside of shrink tubing section 1 with the sealing material before being applied to shaft 4. The pole bolt 4 is then raised to an : ' ~ $ 2 B - -~067147 appropriate temperature and shrink tubing section 1, coated on its inside with an adhesive or sealing material 8, is slipped over pole bolt shaft 4 and uniformly shrunk so that it adheres evenly while the sealing material .
8, which is preferably a hot melt adhesive, visibly -.
. ::
' .
.~ ' ;- .
,. ~ ` ~,'' ~';~,' , .
''"'.:
.' ~ ~' ,:
:, .
. ' :
',:' , ' ~
, ..
-: B -2a- ~
1067~47 .. ` -emerges from its endsO To this end, shrink tubing 1 is shrunk by conventional techniques, eOgO, by use of a hot air blower or an infrared radiatorO For this purpose the temperature of the pole bolt is desirably raised to the -range of about 120 to 140C, about 110C being the lower limitO After cooling has taken place, lid 7 is appliedO Pole bolt shaft 4 then protrudes through sealing ring 2 in cover 7 having cover aperture 3O
The shrink tubing then has a bonding agent 10 brushed onto it.
This agent may be of any suitable, conventional type, preferably dissolved in a solvent such as toluol or polyisobutylene. Thereafter, a cap 9, pre-,......... .
ferably of synthetic material, is so slipped over pole bolt shaft 4 that its lower portion rests tightly upon the upper edge of cell cover 7. Thereafter a casting material 5 is introduced into the hollow between the inner wall , of synthetic cap 9 and the outer wall of shrink tubing section 1 through an , . . .
opening 6 provided in the cap. The casting material 5 is desirably a thixo-tropic mass, preferably a self-hardening two-component polyurethane casting materialO The shrink tubing section may consist of modified wetted poly-olefin and cap 9 of polystyrol.
The particular advantage of an arrangement in accordance with the invention lies in that the sealant-coated shrink tubing seals off the ~ ;
microscopic chamlels, pores, etcO which are always unavoidably present on ; the surface of the lead (especially pure lead) along the entire length of the pole shaft so that the critical sealing zone lies within the electrolyte . .
(sulfuric acid). In this way, the terminal is protected from the corrosive oxygen-acid mixtureO The sealing itself is provided by the sealing ring positioned in the cover in cooperation with the casting enclosed by the capO
By applying bonding agent to the outside of the shrink tubing, especially good adhesion of the casting to the shrink tubing is achieved. Such good ~: .
adhesion is necessary because it is this casting which anchors the plate ; stack against small vertical shocks.
, .
: ;
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electric storage battery is provided with one or more terminal assemblies sealed to the battery cover, the or each terminal assembly com-prising a shaft which extends through a hole in the cover and on to which a flexible tube has been heat-shrunk and a cap which fits around the shaft and rests on a portion of the cover surrounding the hole so as to define an annular space between the shaft with the shrunk-on flexible tube, the cover, and the cap, the annular space being filled with a sealing compound, and the terminal assembly further comprising a gasket which fits around the shrunk-on flexible tube surrounding the shaft and abuts the hole in the cover.
2. An electric storage battery, according to claim 1, where the seal-ing compound is a self-hardening two-component polyurethane.
3. An electric storage battery, according to claim 1, wherein a seal-ing agent is provided between the shaft and the shrunk-on flexible tube.
4 An electric storage battery, according to claim 3, wherein the sealing agent is a fusible adhesive.
5. An electric storage battery, according to any one of claims 1 to 3, wherein the outer surface of the shrunk-on flexible tube is coated with an adhesive agent.
6. An electric storage battery, according to any one of claims 1 to 3, wherein the shaft is attached to an electrode bridge connecting electrodes of the same polarity inside the battery container and the shrunk-on flexible tube covers at least that portion of the shaft between the cover and the electrode bridge.
7. An electric storage battery, according to any one of claims 1 to 3, wherein the cap is made from polystyrene.
8. An electric storage battery, according to any one of claims 1 to 3, which is a lead-acid storage battery.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752535871 DE2535871A1 (en) | 1975-08-12 | 1975-08-12 | ELECTRIC ACCUMULATOR, IN PARTICULAR LEAD ACCUMULATOR WITH SEALED POLE BOLT THROUGH THE LID |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1067147A true CA1067147A (en) | 1979-11-27 |
Family
ID=5953785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA257,360A Expired CA1067147A (en) | 1975-08-12 | 1976-07-20 | Pole bolt seal for storage batteries |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4076908A (en) |
| JP (1) | JPS5222729A (en) |
| AT (1) | AT348608B (en) |
| BE (1) | BE844593A (en) |
| CA (1) | CA1067147A (en) |
| DE (1) | DE2535871A1 (en) |
| FR (1) | FR2321196A1 (en) |
| GB (1) | GB1496478A (en) |
| NL (1) | NL7608036A (en) |
| SE (1) | SE7604943L (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5769662A (en) * | 1980-10-16 | 1982-04-28 | Yuasa Battery Co Ltd | Electrode pole with terminal for storage battery |
| US4350747A (en) * | 1981-06-16 | 1982-09-21 | Union Carbide Corporation | Electrochemical cell with externally coated hermetic seals |
| DE3230628C1 (en) * | 1982-08-18 | 1983-12-29 | Accumulatorenfabrik Sonnenschein GmbH, 6470 Büdingen | Method for producing a gas-tight and fluid-tight terminal seal of a lead-acid accumulator, and a terminal seal produced according to this method |
| DE3417521A1 (en) * | 1984-05-11 | 1985-11-14 | Varta Batterie Ag, 3000 Hannover | Method for connecting a terminal bolt for lead-acid accumulators to a terminal link |
| DK156599C (en) * | 1985-10-04 | 1990-01-29 | Hellesens As | PROCEDURE FOR PREPARING A TERMINAL PERFORMANCE FOR A BATTERY CONSISTING OF OVEN STABLED CELLS |
| US4683647A (en) * | 1986-04-07 | 1987-08-04 | C & D Power Systems, Inc. | Post seal and method of manufacture for lead-acid batteries |
| US5238486A (en) * | 1991-02-19 | 1993-08-24 | Kremenets Yury D | Method and furnace for production of liquid iron |
| US5851695A (en) | 1992-02-10 | 1998-12-22 | C & D Technologies, Inc. | Recombinant lead-acid cell and long life battery |
| DE19715444B4 (en) * | 1997-04-14 | 2007-07-05 | Accumulatorenwerke Hoppecke Carl Zoellner & Sohn Gmbh & Co. Kg | Process for preventing corrosion, in particular crevice corrosion, at battery lead-throughs of batteries and the like, and Pol |
| US6806000B2 (en) | 2002-05-01 | 2004-10-19 | C&D Charter Holdings, Inc. | Post seal for lead acid batteries |
| DE10301043B3 (en) * | 2003-01-13 | 2004-05-27 | Vb Autobatterie Gmbh | Automobile battery with fluid-tight and gas-tight battery pole having fluid-tight and gas-tight seal and electrical connection between pole shaft and pole sleeve |
| US20110206956A1 (en) * | 2010-02-22 | 2011-08-25 | Lineage Power Corporation | Round cell battery |
| CN105977408B (en) * | 2016-07-07 | 2019-02-19 | 丁振荣 | Battery case, battery battery core, battery and its assembly method |
| CN110474000A (en) * | 2019-08-16 | 2019-11-19 | 蚌埠市鑫泰工程塑料制品有限公司 | A kind of battery cell case pole pore structure |
| CN113328181B (en) * | 2021-04-27 | 2023-03-24 | 天能电池集团股份有限公司 | Lead storage battery free of sealant and storage battery pack |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1379854A (en) * | 1918-09-04 | 1921-05-31 | Dinin Alfred | Liquid-tight joint for preventing leakage between the terminal rods and covers of electric accumulators |
| US1371092A (en) * | 1919-07-08 | 1921-03-08 | Philadelphia Storage Battery | Battery-sealing means |
| US1545695A (en) * | 1920-08-26 | 1925-07-14 | John M Puckett | Storage battery |
| US3652340A (en) * | 1969-12-29 | 1972-03-28 | Bell Telephone Labor Inc | Apparatus for and method of forming post seal for lead-acid cell |
-
1975
- 1975-08-12 DE DE19752535871 patent/DE2535871A1/en not_active Withdrawn
-
1976
- 1976-04-08 AT AT256076A patent/AT348608B/en not_active IP Right Cessation
- 1976-04-29 SE SE7604943A patent/SE7604943L/en unknown
- 1976-07-08 US US05/703,542 patent/US4076908A/en not_active Expired - Lifetime
- 1976-07-20 CA CA257,360A patent/CA1067147A/en not_active Expired
- 1976-07-20 NL NL7608036A patent/NL7608036A/en not_active Application Discontinuation
- 1976-07-21 GB GB30444/76A patent/GB1496478A/en not_active Expired
- 1976-07-21 FR FR7622261A patent/FR2321196A1/en active Pending
- 1976-07-28 BE BE169305A patent/BE844593A/en unknown
- 1976-08-12 JP JP51096609A patent/JPS5222729A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE7604943L (en) | 1977-02-13 |
| AT348608B (en) | 1979-02-26 |
| FR2321196A1 (en) | 1977-03-11 |
| DE2535871A1 (en) | 1977-03-03 |
| BE844593A (en) | 1976-11-16 |
| NL7608036A (en) | 1977-02-15 |
| ATA256076A (en) | 1978-07-15 |
| US4076908A (en) | 1978-02-28 |
| JPS5222729A (en) | 1977-02-21 |
| GB1496478A (en) | 1977-12-30 |
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