WO1986004186A1 - Couvercle pour accumulateur - Google Patents

Couvercle pour accumulateur Download PDF

Info

Publication number
WO1986004186A1
WO1986004186A1 PCT/NO1985/000081 NO8500081W WO8604186A1 WO 1986004186 A1 WO1986004186 A1 WO 1986004186A1 NO 8500081 W NO8500081 W NO 8500081W WO 8604186 A1 WO8604186 A1 WO 8604186A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
channels
walls
battery
cells
Prior art date
Application number
PCT/NO1985/000081
Other languages
English (en)
Inventor
Gunnar Sverdrup
Original Assignee
So^/Nnak Batterier A.S.
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 So^/Nnak Batterier A.S. filed Critical So^/Nnak Batterier A.S.
Publication of WO1986004186A1 publication Critical patent/WO1986004186A1/fr

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
    • H01M50/147—Lids or covers
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/394—Gas-pervious parts or elements
    • 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

Definitions

  • the present invention relates to a cover having a venting device for a storage battery, and a battery comprising such a cover.
  • the invention relates to a method of making such a cover having a suitable venting device and such a battery.
  • the object of the present invention is to provide a cover for a storage battery which can be made in an economi ⁇ cally favourable manner, and which simultaneously permits that the possibility of placing the acid filling holes freely is maintained.
  • Another object of the invention is to provide a suitable and simple method of making such a cover and of making a battery having such a cover.
  • the present invention provides a multi-cell storage battery having a gas venting device which with respect to the forming tool and: the assembly work does not depart very much from a conventional embodiment without such a device, with respect to costs. Moreover, it is safer with respect to self-discharge and brings about several advantages relatively to existing devices.
  • the cover according to the invention comprises channels which provide communication from cell to cell, and said channels are partly defined by walls in the cover which protrude perpendicularly to the top of the cover. This makes it possible to cast said walls integrally with the cover.
  • the channels can be completed by fastening a bottom to the edges of said walls, by gluing or welding.
  • the bottom of the channel system is formed by heating of the edges in order to cause that material from adjacent edges is melted together.
  • This can advantageously be performed in con ⁇ nection with joining together of the cover and a battery box in a known manner by fusion welding.
  • Such welding can be carried out by heating, by use of a so-called heat mirror, the edges of the partition walls in the cover and partition walls in the box which are adapted to co ⁇ operate to form tight walls between the cells and tight outer walls.
  • Said heating of the edges of the channel walls can be performed simultaneously with the heating of said walls and partition walls in the box and the cover, for instance by use of the same heat mirror as for these. Thereby is avoided a separate heating in order to achieve melting together of the channel walls-.
  • the heat mirror must have surfaces which heat the edges of the channel walls simultaneously with said other edges of the walls and partition walls. This will be taken into account when making the heat mirror and has small influence, if any, on the heat mirror costs.
  • the channels may in their simplest design be channels which protrude some distance into two adjacent cells. In the finished battery the channels are situated above the electrolyte level, and they, therefore, establish communication for gas between the cells. However, in order to increase the safety against bypass of electro ⁇ lyte the channels may be formed as labyrinths. These may in the principle be made in the same manner as straight channels, in that the channel walls are shaped in such a manner that they define open channels, which are subse ⁇ quently closed, either by fastening a bottom to the edges of the channel walls or by melting together of the edges of the channel walls, in the manner described above.
  • the channel walls which are per ⁇ pendicular to the top of the cover are made by casting them integrally with the cover.
  • the most near at hand is to cast said channels on the inner side of the cover.
  • the channels on the outer side of the cover in such a manner that the cover top is recessed in the channel area, so that the recessed portion of the cover top forms the bottom of the channels , while the upper wall must be provided separately, i.e. after the casting of the cover.
  • the top may be made as a plate which is fastened to the upper edges of the channel walls and forms the upper top portion of the cover.
  • this melting together must be performed separately, and may be performed prior to or after the joining together of the cover and the battery box.
  • Fig. 1 shows one half of a cover according to the invention, in a condition prior to closing of the cast channels.
  • Fig. 2 shows a section along the line A-A i fig. 1, and moreover are shown the upper portions of walls in a battery box to which the cover is to be fastened.
  • FIG. 3 shows in perspective a portion of the cover in the area where channels have been cast.
  • Fig. 4 shows a section perpendicularly through the channel walls and the cover top shown in fig. 3.
  • Fig. 5 shows in perspective the same portion as shown in fig. 3 after the channels have been closed at their bottoms.
  • Fig. 6 shows a section perpendicularly through the walls and the bottom of the channels and the cover top.
  • Fig. 7 shows how the cover has been raised relatively to a battery box, in order to introduce a heat mirror for melting the edges .of the vertical walls which are to be joined, possibly also for making a channel bottom.
  • Fig. 4 shows a section perpendicularly through the channel walls and the cover top shown in fig. 3.
  • Fig. 5 shows in perspective the same portion as shown in fig. 3 after the channels have been closed at their bottoms.
  • Fig. 6 shows a section perpendicularly through the walls and the bottom of the channels and the cover top.
  • Fig. 8 shows, seen towards the underside, a battery cell provided with a labyrinth channel which provides communication between the cell and an adjacent cell to the left of the cell shown.
  • Fig. 9 shows in an enlarged scale a device which may be used in one of the end cells, between channels in the cell and an outlet aperture.
  • Fig. 10 shows a section along the line B-B in fig. 9.
  • Fig. 11 shows, in the same manner as fig. 1, a cover seen towards the underside, in another embodiment, and Fig. 12 shows a section along the line A-A in fig. 11.
  • Figs. 1 and 11 show a cover defined by outer walls 10, and having partition walls 9 which together with corresponding walls in a battery box are adapted to form partitions between the cells.
  • the partition walls 9 define cell units 5, together with the outer walls 10 and the top of the cover.
  • the cover has holes 1 for filling of acid and replenishment of water.
  • Channels 3 are formed from cell to cell, defined by walls 6 being cast integrally with the remainder of the cover.
  • the inlets and the outlets, respectively, of the channels 3 are located mainly in the middle of each cell, except from in the end cell furthest to the right in fig. 1.
  • the channels 3 constitute labyrinths 12.
  • Figs. 2 and 12 also show an outer wall 10 and partition walls 9 between the cells, and the upper portions of partition walls 9 in a box to which the cover is to be fastened are also shown. It appears that the partition walls of the cover and the box, respectively, are in mutual engagement with their lower and upper edges 24, respectively, and the same applies to the outer walls 10. Moreover, the cover may be provided with bevelled lugs 25 for mutual guiding of the walls when the cover is lowered towards the box.
  • the channels 3, which are' defined by the walls 6 cast integrally with the' cover top 8, are open in the downward direction, and the walls 6 terminate in free edges 7. In order to make closed channels 6 the edges 7 can be melted, so that material from adjacent walls flows together.
  • figs. 1, 2, 11 and 12 show the cover in its condition after the casting.
  • fig. 2 the section is taken through a filling hole in cell No. 2 from the right.
  • Said device which comprises a hopper 17 and a vertical tube.18, is situated between the outlet c the channel 3 and the gas venting aperture 11.
  • the channel 3, which in this cell has its inlet close to- the partition wall 9, ends in an opening 19 in the hopper 17 (fig. 1).
  • the hopper 17 is closed at the top, and may contain a disc 20.
  • Said disc may constitute a check valve, and it may constitute a flame preventer, in order to prevent that a possible fire outside of the battery propagates into the battery.
  • gas from the cells furthest to the right may flow through the channel 3 and into the hopper 17.
  • the gas may flow up through the disc 20 and out through the aperture 11. If gas condensates in the hopper the acid may flow down into the cell through the tube 18 which protrudes down into the electrolyte in the cell.
  • the width of the channels 3 prior to the melting together should be relatively large.
  • the channel width should be so small that the mass is not pulled out by the heat mirror 14 (fig. 7).
  • the channel walls 6 should be so thick that there is sufficient of mass to seal the channels by means of a typical melt down of 1 to 3 mm. Too thin channel walls 6 may lead to mechanical unstability which results in that the walls tend to tilt during the melting together of the channel edges, and the danger of leakage from the channels is severe.
  • the walls are as thin as possible, thereby reducing the amount of heat and the cooling period.
  • a channel width 3 of approximately 0,5- to 3 mm and a wall thickness of 1 to 5 mm are found to be practical values.
  • Figs. 3 and 4 show, in perspective and in a vertical section, respectively, a portion of the cover top 8 and the cast channel walls 6 which define the channels 3.
  • Fig. 5 and 6 show, in the same manner as figs. 3 and 4, the cover top 8, cast walls 6 and a bottom 13 for the channels 3, fastened or made by melting together.
  • Fig. 7 illustrates how a heat mirror 14 is used to join the cover and the box.
  • the cover 15, comprising a top 8, outer walls 10, a hole 11 and inner, not shown partition walls having lower edges 24, is presupposed to have inner, open channels as shown in figs. 1, 2, 3 and 4, and are held in a distance above the box 16, which comprises outer walls 10 and inner partition walls having upper edges.
  • the box 16 which comprises outer walls 10 and inner partition walls having upper edges.
  • the heat mirror 14 is introduced between the cover 15 and the box 16, and is lowered into engagement with the box, while the cover is lowered into engagement with the upper side of the heat mirror 14.
  • edges of the outer walls 10 and of the partition walls in the cover and the box are heated, and moreover the lower edges 7 of the walls 6 (not shown in fig. 7) which define the channels 3 are heated.
  • the cover 15 is raised, the heat mirror 14 is retracted to the shown position, and the cover 15 is lowered towards the box 16, so that the outer walls 10 and the not shown partition walls in the cover and the box, respectively, are situated edge to edge and are pressed somewhat together, so that the edges melt together. Because of the melting of the edges 7 of the walls 6 material from neighbour walls flows together and forms a bottom, such as the bottom 13 shown in figs. 5 and 6.
  • Fig. 8 shows, seen towards the underside of a cover, a cell portion 5 defined by outer walls 10 and partition walls 9.
  • the labyrinth channel 12 starts in the partition wall 9 to the right, and terminates on the left side of the same partition wall, inside of the cell portion 5.
  • a hole 1 for filling of acid and replenishment of water.
  • Fig. 9 shows another embodiment of the device shown in the cell portion furthest to the right in fig. 2, adapted to achieve return of acid to the cell to which this cell portion belongs.
  • Fig. 10 shows a section along the line B-B in fig. 9. To the left in the figures is shown a channel 3, which ends in a hopper 17 having a tube 18 protruding down from the bottom. The channel 3 ends in the hopper in an opening 19. Higher in the hopper 17 is a disc 20 which functions as a check valve, as explained in connection with figs. 1 and 2, and the outlet 22 from the hopper is above the disc 20, below the cover top 8. The disc 20 may rest against a shoulder 21 in the hopper 17.
  • the hoppers shown in figs. 1, 2, 9 and 10 are only necessary in the common gas outlet for all the cells of a battery when return of acid is desired.
  • the location of the battery during use is uncertain, as for instance in the engine compartment of an automobile, it is, however, appropriate to make the battery symmetrical about its vertical transverse middle plane (i.e. the furthest to the left in figs. 1 and 2), so that the gas venting aperture is accessible notwithstanding the direction in which the battery is placed.
  • an end cell is to communicate with the gas venting aperture there may be provided an outlet opening and a device for return of acid associated with each of the end cells, and the outlet opening which is not used is closed, for instance by the insertion of a plug or a stopper.
  • the discharge does not necessarily have to be from one of the end cells. . It is possible to provide discharge from one of the intermediate cells, in that the channels between the cells are connected to the intermediate cell in question. Moreover, the outlet aperture or apertures may be situated in the cover top or in one of the side walls or both the side walls.
  • the invention is not limited to labyrinth channels, in that the channels may have a simple design, for instance relatively short and straight channels.
  • the channels can be made by casting, integrally with the cover, in such a manner that channels without bottom are formed primarily.
  • the bottom may be made in several ways, but it is considered to be particularly advantageous to make the bottom by melting together the edges of the channel walls, which may possibly be performed simultaneously with the melting together of the edges of the remaining walls in the cover and the box, respectively.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Couvercle pour un accumulateur contenant un électrolyte dans au moins deux éléments d'accumulateur disposés côte à côte, et procédé de fabrication de ce couvercle et d'un accumulateur comprenant ce couvercle. Le couvercle comprend des canaux (3) qui transportent le gaz qui se développe dans les éléments (5) jusqu'à l'extérieur de l'accumulateur par un orifice commun d'évacuation. Ces canaux sont formés dans la partie supérieure du couvercle, définis par des parois (6) qui font saillie perpendiculairement à la partie supérieure du couvercle. Dans des cloisons (9) du couvercle qui forment des cloisonnements entre les éléments (5), en coopération avec des cloisons du bac d'accumulateur, sont formées des ouvertures qui permettent la communication entre des éléments adjacents par lesdits canaux (3). Au moins un élément est en communication avec l'environnement. Les canaux (3), qui peuvent être façonnés comme des labyrinthes, sont coulés comme des canaux ouverts dans la partie supérieure du couvercle. Le fond du canal est formé par la suite, ou fixé ultérieurement à la pièce coulée, de préférence en fusionnant ensemble les bords (7) et les parois coulées (6) des canaux. De préférence, on exécute cette fusion en même temps que l'assemblage par fusion du couvercle et du bac de l'accumulateur.
PCT/NO1985/000081 1984-12-27 1985-12-19 Couvercle pour accumulateur WO1986004186A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO845240 1984-12-27
NO845240A NO845240L (no) 1984-12-27 1984-12-27 Lokk for elektrisk akkumulator.

Publications (1)

Publication Number Publication Date
WO1986004186A1 true WO1986004186A1 (fr) 1986-07-17

Family

ID=19888014

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1985/000081 WO1986004186A1 (fr) 1984-12-27 1985-12-19 Couvercle pour accumulateur

Country Status (3)

Country Link
EP (1) EP0205540A1 (fr)
NO (1) NO845240L (fr)
WO (1) WO1986004186A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015535U1 (de) * 1990-11-13 1991-03-14 Moll, Peter J., 8623 Staffelstein Batterie
EP0503264A1 (fr) * 1991-03-09 1992-09-16 VB Autobatterie GmbH Batterie d'accumulateurs dont le couvercle comporte un système de ventilation
EP0514918A1 (fr) * 1991-05-23 1992-11-25 Olimpio Stocchiero Dispositif pour évacuer les gaz formés à l'intérieur de batteries d'accumulateurs
EP0692828A2 (fr) * 1994-06-15 1996-01-17 Globe-Union Inc. Couvercle de batterie et système de canal à caractéristiques de résistance à l'éjection et à caractéristiques d'atténuation de l'explosion
DE10254950A1 (de) * 2002-11-26 2004-06-09 Vb Autobatterie Gmbh Akkumulator, insbesondere Bleiakkumulator
EP2228850A2 (fr) * 2009-01-07 2010-09-15 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Module de batterie secondaire
JP2020057471A (ja) * 2018-09-28 2020-04-09 古河電池株式会社 鉛蓄電池

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185262B (de) * 1962-03-22 1965-01-14 Gottfried Hagen A G Akkumulatorendeckel mit Zellenentgasung und Saeureabscheider
GB2042249A (en) * 1979-01-20 1980-09-17 Furukawa Electric Co Ltd Cover for storage battery
US4374187A (en) * 1978-03-04 1983-02-15 The Furukawa Battery Co., Ltd. Cover apparatus in monoblock storage battery
US4444853A (en) * 1983-07-01 1984-04-24 Globe-Union Inc. Storage battery construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185262B (de) * 1962-03-22 1965-01-14 Gottfried Hagen A G Akkumulatorendeckel mit Zellenentgasung und Saeureabscheider
US4374187A (en) * 1978-03-04 1983-02-15 The Furukawa Battery Co., Ltd. Cover apparatus in monoblock storage battery
GB2042249A (en) * 1979-01-20 1980-09-17 Furukawa Electric Co Ltd Cover for storage battery
US4444853A (en) * 1983-07-01 1984-04-24 Globe-Union Inc. Storage battery construction

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015535U1 (de) * 1990-11-13 1991-03-14 Moll, Peter J., 8623 Staffelstein Batterie
EP0503264A1 (fr) * 1991-03-09 1992-09-16 VB Autobatterie GmbH Batterie d'accumulateurs dont le couvercle comporte un système de ventilation
EP0514918A1 (fr) * 1991-05-23 1992-11-25 Olimpio Stocchiero Dispositif pour évacuer les gaz formés à l'intérieur de batteries d'accumulateurs
US5298344A (en) * 1991-05-23 1994-03-29 Olimpio Stocchiero Device for exhausting the fumes forming inside accumulation batteries
EP0692828A2 (fr) * 1994-06-15 1996-01-17 Globe-Union Inc. Couvercle de batterie et système de canal à caractéristiques de résistance à l'éjection et à caractéristiques d'atténuation de l'explosion
EP0692828A3 (fr) * 1994-06-15 1996-03-06 Globe Union Inc Couvercle de batterie et système de canal à caractéristiques de résistance à l'éjection et à caractéristiques d'atténuation de l'explosion
DE10254950A1 (de) * 2002-11-26 2004-06-09 Vb Autobatterie Gmbh Akkumulator, insbesondere Bleiakkumulator
DE10254950B4 (de) * 2002-11-26 2005-02-17 Vb Autobatterie Gmbh Akkumulator, insbesondere Bleiakkumulator
EP2228850A2 (fr) * 2009-01-07 2010-09-15 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Module de batterie secondaire
EP2228850A3 (fr) * 2009-01-07 2011-11-09 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Module de batterie secondaire
US8377584B2 (en) 2009-01-07 2013-02-19 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Secondary battery module
JP2020057471A (ja) * 2018-09-28 2020-04-09 古河電池株式会社 鉛蓄電池

Also Published As

Publication number Publication date
NO845240L (no) 1986-06-30
EP0205540A1 (fr) 1986-12-30

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