GB2087637A - Introducing Terminals Through Battery Covers - Google Patents
Introducing Terminals Through Battery Covers Download PDFInfo
- Publication number
- GB2087637A GB2087637A GB8127066A GB8127066A GB2087637A GB 2087637 A GB2087637 A GB 2087637A GB 8127066 A GB8127066 A GB 8127066A GB 8127066 A GB8127066 A GB 8127066A GB 2087637 A GB2087637 A GB 2087637A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cover
- storage battery
- battery elements
- elements according
- poles
- 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
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 239000012815 thermoplastic material Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 241001247986 Calotropis procera Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- KFVWLMWNKRLYCB-UHFFFAOYSA-N OS(O)(=O)=O.O=[Pb]=O.[Pb] Chemical compound OS(O)(=O)=O.O=[Pb]=O.[Pb] KFVWLMWNKRLYCB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001999 grid alloy Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A cover (2) for an electric lead- acid battery element which, in use, is subjected to an upward thrust generated by the increase in height of the plates, in particular the positive plate, is provided, around its poles (5a, 5b) with elastically yieldable zones (7a, 7b) in the form of concentric rings. Each ring zone is covered at the top by a ring-like cover (8) which can slide along the pole bosses. <IMAGE>
Description
SPECIFICATION
A Cover for Electric Storage Batteries and
Batteries so Covered
This invention relates to a cover for electric storage battery elements, in particular to lead acid battery elements. As it is well known, each battery element and in particular those of sulphuric acid lead-lead dioxide batteries, have two outlet conductors or poles connected to opposed polarity straps leaving the cells for connection in series with adjacent elements and/or the user circuit. The electrolyte being chemically aggressive, the cover, besides ensuring the sealing off of the electrolyte, is intended to prevent the loss of electrolyte also by capillarity along the walls and the poles, to maintain the electric insulation and avoid the corrosion of the metal connectors and containers.
Until now the seal between container and cover has been ensured by two conceptually diverse assembling methods. The first, older, consists in using an intermediate plastic binding made of oxidized petrol bitumen, of a softening near 800C, which ensures an optimum seal while allowing, at the same time, small deformations in the plastic state capable to absorb the deplacement of the poles without damaging the seal.
This method is generally used for single covers on single containers or blocks of more than one cell.
A later technique which is more reliable and quicker to make consists either in the sealing of containers or blocks of cells, made of a heathardening material, with a condensable irreversible resin, or in the autogenous welding by local melting in the case of containers made of thermoplastic materials, in particular of polypropylene.
This technique makes the whole operation quicker and more reliable, especially per block constructions with more than one cell, allowing a seal stable in time, especially for industrial storage batteries.
However, this stability in time has the drawback of preventing any possible adjustment of the poles with respect to the cover, as allowed by the first method.
In addition, the latter technology creates some difficulties regarding the perfect seal at the pole terminals leaving the cover or for allowing to cope with the unavoidable expansion upward of the positive plates given the rigidity of the complex container-cover. Thus, for example, the known technique of ensuring the seal on traction and stationary elements with rubber washers screwed onto the underside of the covers cannot be used because with a fixed cover, it does not allow any adjustment at the moment of welding and during the actual working life.Also the cylindrical rubber bushes used as seal along the cylindrical surface of the poles and ring-like locked onto the cover, create difficultiesduring automatic assembling and working life and do not maintain the desired
sliding effect, the dioxide forming itself on the
pole surface, resulting in stick-slip between
rubber and pole, thereby preventing any
adjustment.
An easily adopted assembling for the making of self-welded battery elements or batteries,
allowing the required technical times consenting
the welding of the cover to the container, is given
by lead bushes embedded into the plastic of the
covers. In fact, these bushes can give the correct
clearance required during the assembling phase
and ensure, through the welding of their upper
ring to the pole stem, the desired perfect seal.
This system, however, does not solve the problem
of the expansions of the positive group, expansion
which may amount also to 2% of the height of the
plate, in a system which is now perfectly rigid.
This problem, though not very important for small
plates with the expansion being absorbed by a
slight bending of the first and of the grid alloys
and a slight deformation of the plates which
increases clogging without damaging either the
plates or the separators, becomes of a
fundamental importance in the case of large
plates, generally used in industrial batteries,
having a height varying from 1 50mm to 600mm
and over. In fact, we have here expansions values
which, if rigidly contrasted, will create point
stresses on the plates resulting in an excessive
curvature and flexion of the latter not only in the
vertical plane of the plate but also normal thereto
and especially when they are deeply cycling in flat
or tube plate. In addition, with relatively high
plates, there is a possibility of breaking stresses
on the cover and cover welds.
Purpose of this invention is a cover for storage
battery elements free from the above-mentioned
drawbacks while, at the same time, ensuring the
correct constraint of the groups within the
container at any moment of the life of the
element.
To be more precise, the purpose of this
invention is a cover for storage battery elements
allowing the absorption, withoutflexure or
bending of the plates, of the expansion of the
positive group also in industrial storage batteries.
The above purposes and other ones according
to this invention are,obtained with a cover
provided with bosses incorporating the lead
bushes and with the bosses being connected to
the surface of the cover through an expandable,
elastic and flexible zone formed of a plurality of
single or multiple concentric rings. These rings
forming the elastic zone around the bosses may
have a convex or concave arc profile.
The particular,conformation of concentric rings
forming the zone around the bosses allows to
absorb by flexure, any variation in height of the
plates, thereby maintaining, practically
unchanged, the pressure on the poles. To prevent
the accumulation of dust and other
heterogeneous substances within the cavities
formed by these concentric rings, the said cavities
are covered with holes diaphragms whose rims
rest on the surface of the cover, with the bosses incorporating the bush sliding in the said holes.
These diaphragms may be coloured in different ways, for example in blue and red, for distinguishing the different polarities and the assembling of the elements in series safer and easier.
Tne flexible concentric-ring zone and the diaphragms are preferably of the thermoplastic material the cover is made of.
The constructional and functional characteristics of the cover for storage battery elements according to this invention will be still better understood from the following description of a preferred embodiment thereof and with reference to the accompanying drawings, without being limited thereto, in which:
Fig. 1 is a schematic cross-section through a storage battery complete with cover;
Fig. 2 is a schematic view of the top seen from above of the storage battery of Fig. 1; and
Fig. 3 is a cross-section through a varient of the cover of this invention, made at one of the two poles.
With reference to the Figs. 1 and 2, the storage battery comprises a container 1, preferably made of polypropylene, containing a group of lead plates 3 and being closed at the top by a cover 2 connected to the container by heat melting along the rims 2'.
Group 3 consists of the positive plates connected to the pole 4a with its relative strap and the negative plates connected to pole 4b again connected to its relative strap. According to the known hot mirror welding art, the cover 2, complete with bushes 4c and 4d, is quickly fitted to the container 1 after melting of the container rims and the cover rims 2' to fix them together.
With covers of the known type, after the welding of the poles 5a and Sb with the bushes 4c and 4d, the only movement of the group is that compatible with the elasticity of the cover 2 and container 1.
According to this invention, and for allowing the poles 5a and 5b, and in particular the pole 5a of the positive plates a controlled upward movement generated by the increase in height during their working life amounting to up to 2%, there are provided around the plastic bosses 6a and 6b incorporating the lead bushes, expansion cavities or rings 7a and 7b. The lower profile, considerably longer and more flexible, of these cavities 7a and 7b with respect to the corresponding parts of the flat and rigid cover they are replacing, allows an elastic fiexure of this part preventing an excessive point load onto the plates.A small cover or diaphragm 8 rests on the edges of the ring-like cavity 7a and 7b and slidingly embraces the boss cylinders 6a and 6b containing the poles 5a and Sb.
After completion of the heat-welding operation the bushes 4c and 4d are perfectly positioned and sealed off with the ends of the poles 9a and 9b, always by melting. The resulting welded stem is in turn connected with the conductors 10 and terminal posts 11. Insulation elements 12 and 13 cover the bare conductors 10.
For allowing the air breathing and filling and for preventing the outflow of the acid from the container 1, the cover 2 is provided with a hole complete with plug 14.
In Fig. 2, at one of the poles 9b, the taps of the tap cover 13 and the cover 8 have been removed for allowing a better view of the expansion rings 7b.
Fig. 3 shows a variant of this invention with the pole 20 being fixed to the cover 21 with a threaded locking ring 24 screwed onto the pole 20 and interacting with each boss of the cover.
The bosses rest on a cylindrical rubber bush 22 of the pole carried by a ring-like projection 23.
The expansion rings 25 around the bushes, according to this invention, allow the upward movement of the pole with respect to the cover during the working life of the battery; during the assembling phase, it allows the cover to deform itself slightly and to rest on the washers and adapt itself sufficiently to allow the reciprocal diffusion and solidification of the molten edges 26 of the container 27 and cover 21 during the heatwelding phase.
Any other embodiment using also only in part or in any other combination the concepts of this invention is considered to be part of the range of protection of the claimed patent. The number of rings for each cavity and their inside and outside profiles or the application on only one or on both poles are simple variants of the here proposed invention.
The container 1, the cover, bosses 6a and 6b as well as the concentric rings 7a and 7b may be made of any thermoplastic material, in particular of polypropylene.
Claims (9)
1. A cover for storage battery elements, in
particular adapted for industrial storage batteries fitted with bosses containing the lead bushes welded to the respective lead plate poles, in which at least one of the said bosses is connected to the cover surface by means of an elastic and flexible zone formed of a plurality of single or
multiple concentric rings.
2. A cover for storage battery elements
according to claim 1, in which the elastic zone
around the boss has a convex arc profile.
3. A cover for storage battery elements
according to claim 1, in which the elastic zone
around the boss has a concave arc profile.
4. A cover for storage battery elements
according to any of the preceding claims in which
the cavities formed by the said concentric rings
are covered by holed diaphragms whose rims rest
on the surface of the cover with the bosses
containing the bush sliding in the holes.
5. A cover for storage battery elements
according to claim 4, in which the diaphragms
have a different colour for each pole.
6. A cover for storage battery elements
according to any of the preceding claims, in which
the flexible concentric-ring zone and the diaphragms are made of the same thermoplastic material the cover is made of.
7. A cover for storage battery elements according to any of the preceding claims, in which the cover is welded to the container by melting of the respective edges and to the poles of the plate straps either by melting or with a threaded locking ring clamped to each pole.
8. A cover for storage battery elements, in particular adapted for industrial storage batteries, as described hereinabove and illustrated in the accompanying drawings.
9. An industrial storage battery having a cover according to any of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT25961/80A IT1134262B (en) | 1980-11-13 | 1980-11-13 | COVER FOR ELEMENT ELECTRIC PUMP ELEMENTS WITH ELASTIC LOCKING OF POLES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2087637A true GB2087637A (en) | 1982-05-26 |
| GB2087637B GB2087637B (en) | 1985-05-15 |
Family
ID=11218281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8127066A Expired GB2087637B (en) | 1980-11-13 | 1981-09-08 | Introducing terminals through battery covers |
Country Status (4)
| Country | Link |
|---|---|
| DE (2) | DE3145174A1 (en) |
| FR (1) | FR2494045A1 (en) |
| GB (1) | GB2087637B (en) |
| IT (1) | IT1134262B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4467021A (en) * | 1981-12-21 | 1984-08-21 | Olimpio Stocchiero | Cell-container and cell-lid for electric-accumulators particularly for those meant for traction |
| EP0170066A1 (en) * | 1981-12-21 | 1986-02-05 | Olimpio Stocchiero | Lid for lead-accumulators |
| EP0310946A1 (en) * | 1987-10-09 | 1989-04-12 | Olimpio Stocchiero | Lid for lead-acid accumulators with elastic and deformable pole seats |
| WO1990005999A1 (en) * | 1988-11-24 | 1990-05-31 | Akkumulatorenfabrik Dr. Leopold Jungfer | Introduction of a lead terminal through the case cover of accumulator cells |
| EP0399247A1 (en) * | 1989-05-26 | 1990-11-28 | Olimpio Stocchiero | Lid for accumulator batteries suited to absorb the deformation of the poles |
| US5283137A (en) * | 1991-04-29 | 1994-02-01 | Optima Batteries, Inc. | Cover assembly for rechargeable battery |
| US7233479B2 (en) * | 2003-04-04 | 2007-06-19 | Daimlerchrysler Ag | Device for protecting a battery from electrostatic charging |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4319923C1 (en) * | 1993-06-16 | 1995-04-27 | Deta Akkumulatoren | Pole feed-through for accumulators |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7307438U (en) * | 1973-06-14 | Varta Batterie Ag | End pole lead-through for accumulators | |
| US2151650A (en) * | 1934-08-29 | 1939-03-21 | Nat Battery Co | Post sealing device for storage battery cells |
| US3077509A (en) * | 1959-08-17 | 1963-02-12 | Electro Acid Corp | Electric storage battery |
| FR1529706A (en) * | 1967-04-13 | 1968-06-21 | Western Electric Co | Lead acid accumulator |
| FR2295577A1 (en) * | 1974-12-21 | 1976-07-16 | Varta Batterie | POLAR PART FOR ACCUMULATORS |
| SE442155B (en) * | 1977-02-11 | 1985-12-02 | Nordiska Ackumulator Fabriker | POLBULTS THROUGH THE LOCK FOR THE HOUSING WITH AN ELECTRIC ACCUMULATOR |
| US4158721A (en) * | 1978-05-11 | 1979-06-19 | Gte Sylvania Incorporated | Glass-to-metal seal for electrochemical cells |
| DE2833416C2 (en) * | 1978-07-29 | 1980-06-26 | Accumulatorenwerk Hoppecke Carl Zoellner & Sohn, 5000 Koeln | Process for the production of a pole leadthrough for accumulators and their design |
| JPS58150B2 (en) * | 1978-11-04 | 1983-01-05 | 宮川化成工業株式会社 | storage battery |
| CH647620A5 (en) * | 1980-02-22 | 1985-01-31 | Electrona Sa | Housing for an accumulator cell having a welded cover |
| DE3035655A1 (en) * | 1980-09-20 | 1982-05-13 | Robert Bosch Gmbh, 7000 Stuttgart | Electrochemical accumulator - has connecting lug sealed by O=ring in pocket with cap |
-
1980
- 1980-11-13 IT IT25961/80A patent/IT1134262B/en active
-
1981
- 1981-09-08 GB GB8127066A patent/GB2087637B/en not_active Expired
- 1981-09-21 FR FR8118164A patent/FR2494045A1/en active Granted
- 1981-11-13 DE DE19813145174 patent/DE3145174A1/en not_active Withdrawn
- 1981-11-13 DE DE19818133246U patent/DE8133246U1/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4467021A (en) * | 1981-12-21 | 1984-08-21 | Olimpio Stocchiero | Cell-container and cell-lid for electric-accumulators particularly for those meant for traction |
| EP0170066A1 (en) * | 1981-12-21 | 1986-02-05 | Olimpio Stocchiero | Lid for lead-accumulators |
| EP0310946A1 (en) * | 1987-10-09 | 1989-04-12 | Olimpio Stocchiero | Lid for lead-acid accumulators with elastic and deformable pole seats |
| US4898795A (en) * | 1987-10-09 | 1990-02-06 | Olimpio Stocchiero | Lid for lead-acid accumulators with elastic and deformable pole seats |
| WO1990005999A1 (en) * | 1988-11-24 | 1990-05-31 | Akkumulatorenfabrik Dr. Leopold Jungfer | Introduction of a lead terminal through the case cover of accumulator cells |
| EP0399247A1 (en) * | 1989-05-26 | 1990-11-28 | Olimpio Stocchiero | Lid for accumulator batteries suited to absorb the deformation of the poles |
| US5283137A (en) * | 1991-04-29 | 1994-02-01 | Optima Batteries, Inc. | Cover assembly for rechargeable battery |
| US5415956A (en) * | 1991-04-29 | 1995-05-16 | Optima Batteries, Inc. | Cover assembly for rechargeable battery |
| US7233479B2 (en) * | 2003-04-04 | 2007-06-19 | Daimlerchrysler Ag | Device for protecting a battery from electrostatic charging |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8133246U1 (en) | 1985-05-09 |
| DE3145174A1 (en) | 1982-06-16 |
| FR2494045B1 (en) | 1985-03-22 |
| IT8025961A0 (en) | 1980-11-13 |
| IT1134262B (en) | 1986-08-13 |
| GB2087637B (en) | 1985-05-15 |
| FR2494045A1 (en) | 1982-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20010907 |