CA1040260A - Pole bolt seal for galvanic cells - Google Patents
Pole bolt seal for galvanic cellsInfo
- Publication number
- CA1040260A CA1040260A CA233,616A CA233616A CA1040260A CA 1040260 A CA1040260 A CA 1040260A CA 233616 A CA233616 A CA 233616A CA 1040260 A CA1040260 A CA 1040260A
- Authority
- CA
- Canada
- Prior art keywords
- ring
- sealing
- nut
- bolt
- sealing ring
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
ABSTRACT
The sealing ring which encircles the pole bolt protruding through a cell cover is compressed between the cover and the head of the pole bolt.
The degree of compression is limited by a non-elastic spacer ring encircling the sealing ring.
The sealing ring which encircles the pole bolt protruding through a cell cover is compressed between the cover and the head of the pole bolt.
The degree of compression is limited by a non-elastic spacer ring encircling the sealing ring.
Description
U
The present invention relates to a pole bolt seal for galvanic elements, and especially for hermetically sealed cells, utilizing a sealing ring of elastic material, and an insulating ring between pole bolt and cell cover.
For pole bolts which are electrically insulated from the cell cover, it is often quite difficult to provide reliable sealing. It has been found that, particularly for alkaline storage batteries, the electrolyte escapes because of so-called creepage even through the narrowest gaps in the cell housing. This leads to loss of electrolyte and gradual drying out of 10 the cell. It also leads to deterioration of adjacent metallic parts, such as the cable clamps or the connector cable.
It is known to prevent escape of the electrolyte by means of tight-ly fitted elastic sealing discs or sealing sleeves. However, these are also incapable of providing a permanent seal. The available elastic materials frequently become brittle or crack. Particularly undesirable is the loss of elasticity which they undergo with the passage of time. To achieve permanent sealing, the pole bolt nut is periodically ~ightened. In this way, the subsisting elasticity of the sealing material is utilized, until this material begins to exhibit plastic properties due to the fre-20 quent tightening. When that happens, reliable sealing is no longer possible.
Moreover, because of the material fatigue noted above, such seals conno~ be simply reused after disassembly for service or repair.
According to the present invention there is provided in a sealing arrangement for a galvanic cell having a cell cover, a pole bolt which pro-trudes through an aperture in the cell cover, and a pole bolt nut, the improvement comprising: a sealing ring of elastic material which encircles the bolt and which is positioned for compression in response to tightening of the nut, and a spacer ring encircling the sealing ring and positioned to be subjected to pressure in response to tightening of the nut, said spacer ring being substantially inelastic, said cover, bolt, nut, sealing ring and spacer ring being so positioned and proportioned relative to each B ~ A
~, . : ' ' ' ' ~ . "' :~ . . "
-:' ' :', , . . .. . :
1~4~
other that the spacer ring alone limits the tightening of the nut, whereby the compression of the sealing ring is also limited by the spacer ring alone.
In a preferred embodiment, the sealing ring is placed between the cell cover and the head of the pole bolt, positioned so that it extends radially between an annular shoulder of an insulating ring and the spacer ring which is made of non-elastic ma-B la -~ , . ,, . . , ' 1~4~
terial.
For further details, reference may be made to the discussion which follows, in the light of the accompanying drawings wherein:
Figure 1 is a view, partly in cross-section, of a pole bolt and sealing construction embodying the invention; and Figure 2 is a cut away view of an alternative form of a portion of the embodiment of Figure 1.
Referring to Figure 1, the pole bolt l protrudes through an open-ing in cell cover 2. Electrical insulation is provided by an insulating ring 3 encircling pole bolt 1. The shoulder 31 of insulating ring 3 extends into a recess between pole bolt 1 and cell cover 2. The lower portion of this ring shoulder is encircled by the sealing ring 4, proper. Sealing ring 4 is posi-tioned between cell cover 2, above it, and the lower portion of pole bolt l, which is in the shape of a bolt head. Pole bolt 1 rests on plate yoke 6, by means of which all the plates are connected to each other.
Between plate yoke 6 and cell cover 2 a non-elastic spacer ring 7 is provided, which encircles sealing ring 4. By means of spacer ring 7, pres-sure exerted by cell cover 2 and pole bolt 1 can be applied to sealing ring 4 (0-ring). The pressure so applied to sealing ring 4 is a function of the -height of spacer ring 7. This makes it possible to apply that pressure which is optimum for the sealing ring, in order that the material of this sealing ring shall remain elastic. The actual pressure is applied by tightening of pole bolt nut 8. In order to keep pole bolt nut 8 elastically und~r tension, a spring washer 9 is preferably inserted between it and insulating ring 3.
It is preferred that sealing ring 4 can be separated from the electrolyte space 10 by its encircling spacer ring 7. This provides high re-liability protection for the sealing ring from attack by free acid during mo-vement of the cell.
A particular advantage of the invention is its permanent, fati-gue-free pole bolt seal. Also, the predetermined height of the spacer ring .. - : :
' : ' ' .
provides a precise limit to the tightening of the pole bolt nut.
- As shown in Figure 2, the spacer ring construction may be modi-fied by sandwiching the non-elastic spacer ring 7, proper, between upper and lower layers 11 of elastic material. This further improves the sealing ef-fectiveness of the structure.
The spacer ring may be made of substantially non-elastic acid resistant plastic such as polysulphonate. The sealing materials may be of conventional O-ring type, such as acid resistant synthetic rubber.
' , ................. ~,~, ' ,~
~- - .
The present invention relates to a pole bolt seal for galvanic elements, and especially for hermetically sealed cells, utilizing a sealing ring of elastic material, and an insulating ring between pole bolt and cell cover.
For pole bolts which are electrically insulated from the cell cover, it is often quite difficult to provide reliable sealing. It has been found that, particularly for alkaline storage batteries, the electrolyte escapes because of so-called creepage even through the narrowest gaps in the cell housing. This leads to loss of electrolyte and gradual drying out of 10 the cell. It also leads to deterioration of adjacent metallic parts, such as the cable clamps or the connector cable.
It is known to prevent escape of the electrolyte by means of tight-ly fitted elastic sealing discs or sealing sleeves. However, these are also incapable of providing a permanent seal. The available elastic materials frequently become brittle or crack. Particularly undesirable is the loss of elasticity which they undergo with the passage of time. To achieve permanent sealing, the pole bolt nut is periodically ~ightened. In this way, the subsisting elasticity of the sealing material is utilized, until this material begins to exhibit plastic properties due to the fre-20 quent tightening. When that happens, reliable sealing is no longer possible.
Moreover, because of the material fatigue noted above, such seals conno~ be simply reused after disassembly for service or repair.
According to the present invention there is provided in a sealing arrangement for a galvanic cell having a cell cover, a pole bolt which pro-trudes through an aperture in the cell cover, and a pole bolt nut, the improvement comprising: a sealing ring of elastic material which encircles the bolt and which is positioned for compression in response to tightening of the nut, and a spacer ring encircling the sealing ring and positioned to be subjected to pressure in response to tightening of the nut, said spacer ring being substantially inelastic, said cover, bolt, nut, sealing ring and spacer ring being so positioned and proportioned relative to each B ~ A
~, . : ' ' ' ' ~ . "' :~ . . "
-:' ' :', , . . .. . :
1~4~
other that the spacer ring alone limits the tightening of the nut, whereby the compression of the sealing ring is also limited by the spacer ring alone.
In a preferred embodiment, the sealing ring is placed between the cell cover and the head of the pole bolt, positioned so that it extends radially between an annular shoulder of an insulating ring and the spacer ring which is made of non-elastic ma-B la -~ , . ,, . . , ' 1~4~
terial.
For further details, reference may be made to the discussion which follows, in the light of the accompanying drawings wherein:
Figure 1 is a view, partly in cross-section, of a pole bolt and sealing construction embodying the invention; and Figure 2 is a cut away view of an alternative form of a portion of the embodiment of Figure 1.
Referring to Figure 1, the pole bolt l protrudes through an open-ing in cell cover 2. Electrical insulation is provided by an insulating ring 3 encircling pole bolt 1. The shoulder 31 of insulating ring 3 extends into a recess between pole bolt 1 and cell cover 2. The lower portion of this ring shoulder is encircled by the sealing ring 4, proper. Sealing ring 4 is posi-tioned between cell cover 2, above it, and the lower portion of pole bolt l, which is in the shape of a bolt head. Pole bolt 1 rests on plate yoke 6, by means of which all the plates are connected to each other.
Between plate yoke 6 and cell cover 2 a non-elastic spacer ring 7 is provided, which encircles sealing ring 4. By means of spacer ring 7, pres-sure exerted by cell cover 2 and pole bolt 1 can be applied to sealing ring 4 (0-ring). The pressure so applied to sealing ring 4 is a function of the -height of spacer ring 7. This makes it possible to apply that pressure which is optimum for the sealing ring, in order that the material of this sealing ring shall remain elastic. The actual pressure is applied by tightening of pole bolt nut 8. In order to keep pole bolt nut 8 elastically und~r tension, a spring washer 9 is preferably inserted between it and insulating ring 3.
It is preferred that sealing ring 4 can be separated from the electrolyte space 10 by its encircling spacer ring 7. This provides high re-liability protection for the sealing ring from attack by free acid during mo-vement of the cell.
A particular advantage of the invention is its permanent, fati-gue-free pole bolt seal. Also, the predetermined height of the spacer ring .. - : :
' : ' ' .
provides a precise limit to the tightening of the pole bolt nut.
- As shown in Figure 2, the spacer ring construction may be modi-fied by sandwiching the non-elastic spacer ring 7, proper, between upper and lower layers 11 of elastic material. This further improves the sealing ef-fectiveness of the structure.
The spacer ring may be made of substantially non-elastic acid resistant plastic such as polysulphonate. The sealing materials may be of conventional O-ring type, such as acid resistant synthetic rubber.
' , ................. ~,~, ' ,~
~- - .
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a sealing arrangement for a galvanic cell having a cell cover, a pole bolt which protrudes through an aperture in the cell cover and a pole bolt nut, the improvement comprising:
a sealing ring of elastic material which encircles the bolt and which is positioned for compression in response to tightening of the nut, and a spacer ring encircling the sealing ring and positioned to be subjected to pressure in response to tightening of the nut, said spacer ring being sub-stantially inelastic, said cover, bolt, nut, sealing ring and spacer ring being so positioned and proportioned relative to each other that the sapcer ring alone limits the tightening of the nut, whereby the compression of the sealing ring is also limited by the spacer ring alone.
a sealing ring of elastic material which encircles the bolt and which is positioned for compression in response to tightening of the nut, and a spacer ring encircling the sealing ring and positioned to be subjected to pressure in response to tightening of the nut, said spacer ring being sub-stantially inelastic, said cover, bolt, nut, sealing ring and spacer ring being so positioned and proportioned relative to each other that the sapcer ring alone limits the tightening of the nut, whereby the compression of the sealing ring is also limited by the spacer ring alone.
2. The sealing arrangement of claim 1 wherein the sealing ring is positioned between the cell cover and the head of the pole bolt.
3. The sealing arrangement of claim 2 wherein the spacer ring is posi-tioned adjacent the sealing ring so that the sealing ring is also compressed radially against the spacer ring in response to tightening of the nut.
4. The sealing arrangement of claim 3 wherein annular insulating means encircles the pole bolt between the bolt and the sealing ring.
5. The sealing arrangement of claim 3 wherein the spacer ring is a sandwich of materials of different elasticity.
6. The sealing arrangement of claim 5 wherein the sandwich includes a layer of substantially non-elastic material.
7. The sealing arrangement of claim 6 wherein the layer of non-elastic material is sandwiched between two layers of elastic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE7428070 | 1974-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1040260A true CA1040260A (en) | 1978-10-10 |
Family
ID=6646268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA233,616A Expired CA1040260A (en) | 1974-08-19 | 1975-08-18 | Pole bolt seal for galvanic cells |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4053693A (en) |
| JP (1) | JPS5141835A (en) |
| CA (1) | CA1040260A (en) |
| FR (1) | FR2282586A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245014A (en) * | 1979-08-30 | 1981-01-13 | Esb International Corp. | High pressure post seal for batteries |
| FR2534069B1 (en) * | 1982-09-30 | 1986-04-04 | Jeumont Schneider | WATERPROOF CROSS-SECTION FOR ENCLOSURE, PARTICULARLY CONTAINING SEMICONDUCTORS |
| GB8325949D0 (en) * | 1983-09-28 | 1983-11-02 | Tungstone Batteries Ltd | Electric batteries |
| SE452528B (en) * | 1984-10-29 | 1987-11-30 | Sab Nife Ab | DEVICE FOR AN ELECTROCHEMICAL ACCUMULATOR BATTERY FOR SEALING PUTTING A SCREW CONNECTOR FOR ELECTRICAL CONNECTION THROUGH A CELL WALL OPENING |
| DE3520851A1 (en) * | 1985-06-11 | 1986-12-11 | Deutsche Automobilgesellschaft Mbh, 3000 Hannover | DISASSEMBLABLE GAS AND LIQUID-TIGHT POLD COUPLING FOR A GALVANIC CELL OR BATTERY |
| US4883729A (en) * | 1988-05-02 | 1989-11-28 | Gates Energy Product, Inc. | Battery terminal locking assembly |
| JP5308430B2 (en) * | 2010-11-18 | 2013-10-09 | 本田技研工業株式会社 | Battery module connection structure, battery module, and battery module terminal assembly method |
| US11417973B2 (en) * | 2020-11-04 | 2022-08-16 | Hopkins Manufacturing Corporation | Connector assembly for connection to a vehicle electrical ground |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1312038A (en) * | 1919-08-05 | Stobage-battert | ||
| US1585874A (en) * | 1926-05-25 | Storage-battery terminal | ||
| FR525199A (en) * | 1920-09-28 | 1921-09-16 | Accumulateurs Fixes | Cable gland for accumulators |
| FR869489A (en) * | 1940-02-28 | 1942-02-03 | Accumulatoren Fabrik Ag | Alkaline accumulator with metal container |
| US3068313A (en) * | 1958-11-19 | 1962-12-11 | Union Carbide Corp | High pressure mechanical seal gasket |
-
1975
- 1975-08-04 FR FR7524284A patent/FR2282586A1/en active Granted
- 1975-08-06 US US05/602,393 patent/US4053693A/en not_active Expired - Lifetime
- 1975-08-11 JP JP50097427A patent/JPS5141835A/ja active Pending
- 1975-08-18 CA CA233,616A patent/CA1040260A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2282586A1 (en) | 1976-03-19 |
| US4053693A (en) | 1977-10-11 |
| FR2282586B1 (en) | 1981-04-10 |
| JPS5141835A (en) | 1976-04-08 |
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