CA1141433A - High pressure post seal for batteries - Google Patents
High pressure post seal for batteriesInfo
- Publication number
- CA1141433A CA1141433A CA000353965A CA353965A CA1141433A CA 1141433 A CA1141433 A CA 1141433A CA 000353965 A CA000353965 A CA 000353965A CA 353965 A CA353965 A CA 353965A CA 1141433 A CA1141433 A CA 1141433A
- Authority
- CA
- Canada
- Prior art keywords
- post
- cavity
- bore
- seal
- battery
- 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 of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- 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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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 of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- 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)
- Secondary Cells (AREA)
Abstract
HIGH PRESSURE POST SEAL FOR BATTERIES
ABSTRACT OF THE DISCLOSURE
A multistaged high pressure post seal system resistant to acid attack. A post cavity (18), formed within a battery case (14), contains a post (16) projecting through a bore (20) at the base of the cavity (18). An O-ring (24) disposed between the post (16) and the bore (20) of the cavity (18) forms a first seal. A self-sealing member (32 or 40) in communication with the post (16) forms a second seal whereas epoxy (36) introduced into the cavity (18) forms a third seal.
Two embodiments are disclosed.
ABSTRACT OF THE DISCLOSURE
A multistaged high pressure post seal system resistant to acid attack. A post cavity (18), formed within a battery case (14), contains a post (16) projecting through a bore (20) at the base of the cavity (18). An O-ring (24) disposed between the post (16) and the bore (20) of the cavity (18) forms a first seal. A self-sealing member (32 or 40) in communication with the post (16) forms a second seal whereas epoxy (36) introduced into the cavity (18) forms a third seal.
Two embodiments are disclosed.
Description
`
~14~3~
HIGH rRESSURE POST SEAL FOR BATTERIE5 TEC~INICAL FIELD
This invention relates to batteries in general and more speci~
fically to a multistaged post seal system especially suited for secondary - 5 battery applications.
BACKGROUND ART
Recently, the demand for small, sealed, rechargea~le lead-acid batteries has increased dramatically. In contradistinction to the familiar automotive-type lead-acid batteries, these batteries are small, relatively lightweight, sealed and leakproof. As a consequence, they are capable of delivering a steady current in any position or orientation. Typically, these batteries are employed in emergency lighting systems, portable power and garden tools, engine starting systems and in standby electrical systems for computer appli-cations.
Like all lead-acid batteries, however, these batteries are subject to off-gassing during recharging periods. During the recharge cycle, the water contained within the battery may ~e decomposed into hydrogen and oxygen. In order to provide long life for these batteries, it is necessary to promote o~ygen recombination within each cell. It is kno~n that a pressurized environment between 30-50 pounds per square inch (psi) within the cells ~till expedite oxygen recombination.
Cne of the problems facing the battery industry is the ~aintenance of a sound post seal. Most current designs emp10y epoxy to seal a lead electrode or post to a plastic battery cover. Unfortunately, it is very difficult to get a good sealing bond between the epoxy and the lead post during typical mass production techniques.
. . .
~, . ' ' ,' , - ': ~ :
.
oreover, over an extended period of time, the sulfuric acid electro-lyte tends to creep up the post to the seal. The acid chemically attacks the post.thereby resulting in a porous layer on -the pos-t. In time, the electroly-te .
advances up.the length of the post and under the epoxy seal until an open dir-ect path is provided to.the outside of the cover. This debilitating corrosion action destroys the high pressure seal, thus ensuring electrolyte leakage and shortened battery life.
Clearly, a post seal design that is capable of maintaining a sound seal c~bout a battery pos-t is desirable.
SUMMARY_I~F I~E INVENIION
The present invention overcomes the diEficulties described above.
. Our invention may ~eneràlly be defined as the corbination with a battery, the battery including a case and at least one terminal post projecting through the case of a post seal system for preventing gas pressure leakage and electrolyte leakage about the post. The post seal system ccmprises a recessed cavity formed within the case; the cavity including a bore ccmmunicating with the in-terior of the batteryt the post extending through the bore, first sealing means disposed between the post and the bore, a sealant-containing mem~er thread-ably engaging the post within the cavity, the member in sealing registry with the bore, cavity and post, second sealing means disposed within the cavity for sealing the cavity, and means for connecting the post to external electrical components.
BRIEF DESCRIPTION OF T~E DR~INGS
Figure 1 is a sectional side view of an embodiment of the invention.
Figure 2 is a sectional side view of an alternate emkodiment of the invention.
PREFERRED ~ODES FOR C~RRYING OU~ IHE INVENTION
Figure 1 and 2 depict t~o alternatè embodiments of a high pressure ., . I
. ~
~L~L4~L433 . - .
.
battery post seal. For ease of discussion, the post seal system shown in Figure 1 will carry reference numeral 10, whereas the post seal system, as shown in Figure 2, will carry reference numeral 12. However, shared component parts will be n~bered similarly.
. .
. I
~ ' ' ' ' i ~' , .
,, I
~14~3~
HIGH rRESSURE POST SEAL FOR BATTERIE5 TEC~INICAL FIELD
This invention relates to batteries in general and more speci~
fically to a multistaged post seal system especially suited for secondary - 5 battery applications.
BACKGROUND ART
Recently, the demand for small, sealed, rechargea~le lead-acid batteries has increased dramatically. In contradistinction to the familiar automotive-type lead-acid batteries, these batteries are small, relatively lightweight, sealed and leakproof. As a consequence, they are capable of delivering a steady current in any position or orientation. Typically, these batteries are employed in emergency lighting systems, portable power and garden tools, engine starting systems and in standby electrical systems for computer appli-cations.
Like all lead-acid batteries, however, these batteries are subject to off-gassing during recharging periods. During the recharge cycle, the water contained within the battery may ~e decomposed into hydrogen and oxygen. In order to provide long life for these batteries, it is necessary to promote o~ygen recombination within each cell. It is kno~n that a pressurized environment between 30-50 pounds per square inch (psi) within the cells ~till expedite oxygen recombination.
Cne of the problems facing the battery industry is the ~aintenance of a sound post seal. Most current designs emp10y epoxy to seal a lead electrode or post to a plastic battery cover. Unfortunately, it is very difficult to get a good sealing bond between the epoxy and the lead post during typical mass production techniques.
. . .
~, . ' ' ,' , - ': ~ :
.
oreover, over an extended period of time, the sulfuric acid electro-lyte tends to creep up the post to the seal. The acid chemically attacks the post.thereby resulting in a porous layer on -the pos-t. In time, the electroly-te .
advances up.the length of the post and under the epoxy seal until an open dir-ect path is provided to.the outside of the cover. This debilitating corrosion action destroys the high pressure seal, thus ensuring electrolyte leakage and shortened battery life.
Clearly, a post seal design that is capable of maintaining a sound seal c~bout a battery pos-t is desirable.
SUMMARY_I~F I~E INVENIION
The present invention overcomes the diEficulties described above.
. Our invention may ~eneràlly be defined as the corbination with a battery, the battery including a case and at least one terminal post projecting through the case of a post seal system for preventing gas pressure leakage and electrolyte leakage about the post. The post seal system ccmprises a recessed cavity formed within the case; the cavity including a bore ccmmunicating with the in-terior of the batteryt the post extending through the bore, first sealing means disposed between the post and the bore, a sealant-containing mem~er thread-ably engaging the post within the cavity, the member in sealing registry with the bore, cavity and post, second sealing means disposed within the cavity for sealing the cavity, and means for connecting the post to external electrical components.
BRIEF DESCRIPTION OF T~E DR~INGS
Figure 1 is a sectional side view of an embodiment of the invention.
Figure 2 is a sectional side view of an alternate emkodiment of the invention.
PREFERRED ~ODES FOR C~RRYING OU~ IHE INVENTION
Figure 1 and 2 depict t~o alternatè embodiments of a high pressure ., . I
. ~
~L~L4~L433 . - .
.
battery post seal. For ease of discussion, the post seal system shown in Figure 1 will carry reference numeral 10, whereas the post seal system, as shown in Figure 2, will carry reference numeral 12. However, shared component parts will be n~bered similarly.
. .
. I
~ ' ' ' ' i ~' , .
,, I
-2(a)- 1 :
-3- PC-665~
Referring now to Figure 1, there is shown a partial view of the upper surface of battery case 14. Disposed within the battery case 14 ; (but not shown) are typical lead-acid battery components~ For example, a plurality of alternating positive and negative plates of lead dioxide and lead are immersed in a sulfuric acid (H2S04) electrolyte. A series of intercell connectors, called straps, connect the respective plates ; to a positive terminal and a negative terminal proiecting from the battery case 14. ~or the purposes of this spec~ication, post 16 may be either the positive or negative terminal. The system 10 (and 12) may -: 10 be utilized with either type of terminal. Typically, a battery will have two terminals. The disclosed embodimeDts may be utilized with other types of batteries as well.
Post cavity 18 is recessecl into the case 1~l. Bore 20 provides an open communications means between the interior of the battery 22 and lS the cavity 18. The post 16 projects into the cavlty 18 through the ~ore 20.
A flexible 0-ring 24 acts as a sealing t~asher between post shoulder 28 and cavity recess 26. Tab 30, affixed to the pos~ 16, provides the means for supplying electrical current to external components.
Disposed within the cavity 18 and threadably affi~ed to the post 16 is a self-threading sealant containing member or nut 32. The n~t 32, : available commercially under the PALNUT trademark tSerial Number - SKW188008SC~, is designed to extrude an acid-resistant mastic seal 34 about the post 16 and the bore 20 within the cavity 18 as it is tightened down about the post 16. (PALNUT is a trademark of TRW).
Epoxy ~iller 36 seals the cavity 18 and the system 10 (and system 12 components contained therein.
Referring now to Figure 2, there is sho~n an embodiment of the seal system 12. The two illustrated systems 10 and 12 are similar except that the post 16 includes an opening 38. A self-tapping sealant containing member or screw 40 threadably engages the post 16 within the opening 38. As with the nut 32, the screw 40 extrudes an acid-resistant, mastic seal 34 about the post 16 and the bore 20 within the cavity 18. The mastic sealant may be applied to the ~nderside of the head of the screw 40 prior to the inser~ion of the screw 40 into the post 16. The tab 30 is a~fixed to the screw 40.
.
Referring now to Figure 1, there is shown a partial view of the upper surface of battery case 14. Disposed within the battery case 14 ; (but not shown) are typical lead-acid battery components~ For example, a plurality of alternating positive and negative plates of lead dioxide and lead are immersed in a sulfuric acid (H2S04) electrolyte. A series of intercell connectors, called straps, connect the respective plates ; to a positive terminal and a negative terminal proiecting from the battery case 14. ~or the purposes of this spec~ication, post 16 may be either the positive or negative terminal. The system 10 (and 12) may -: 10 be utilized with either type of terminal. Typically, a battery will have two terminals. The disclosed embodimeDts may be utilized with other types of batteries as well.
Post cavity 18 is recessecl into the case 1~l. Bore 20 provides an open communications means between the interior of the battery 22 and lS the cavity 18. The post 16 projects into the cavlty 18 through the ~ore 20.
A flexible 0-ring 24 acts as a sealing t~asher between post shoulder 28 and cavity recess 26. Tab 30, affixed to the pos~ 16, provides the means for supplying electrical current to external components.
Disposed within the cavity 18 and threadably affi~ed to the post 16 is a self-threading sealant containing member or nut 32. The n~t 32, : available commercially under the PALNUT trademark tSerial Number - SKW188008SC~, is designed to extrude an acid-resistant mastic seal 34 about the post 16 and the bore 20 within the cavity 18 as it is tightened down about the post 16. (PALNUT is a trademark of TRW).
Epoxy ~iller 36 seals the cavity 18 and the system 10 (and system 12 components contained therein.
Referring now to Figure 2, there is sho~n an embodiment of the seal system 12. The two illustrated systems 10 and 12 are similar except that the post 16 includes an opening 38. A self-tapping sealant containing member or screw 40 threadably engages the post 16 within the opening 38. As with the nut 32, the screw 40 extrudes an acid-resistant, mastic seal 34 about the post 16 and the bore 20 within the cavity 18. The mastic sealant may be applied to the ~nderside of the head of the screw 40 prior to the inser~ion of the screw 40 into the post 16. The tab 30 is a~fixed to the screw 40.
.
4 PC-665~
The invention and the manner of applying it may, perhaps, be better understood by a brief discussion of the principles underlying the invention~
Both systems 10 and 12 are designed to overcome the leakage problem encountered by small rechargeable batteries. In particular, the systems present a three stage seal assembly that is capable of ~ith-standing high internal pressures while, simultaneously, providing ~ong battery life. It is contemplated that the system 10 will be employed in larger capacity batteries whereas the system l~ may be utilized in smaller batteries since this design may be made physically smaller than the design of system 10 and thus meet the physical limitations of smaller batteries. However, the two systems lO and 12 may be used interchangeably.
The first stage seal is formed between ~he post shoulder 28 and the cavity recess 26 through the offices of the 0-ring 24. Besides serving as a first stage washer seal, the 0-ring 24 acts as a cushioning member between the post 16 and the battery case cover 14 durin~ Einal battery assembly when the battery case cover 14 is heat sealably joined to the remainder of the battery case. In ~iew of the fact that:
the compressible 0-ring 24 is exposed to a highly corrosive sulfuric acid environment, the 0-ring 24 should be made from an acid resistant material, preferably ethylene propylene copolymer.
The second stage seal is provided by the nut 32 or the screw 40.
By tightening the nut 32 or the screw 40, mastic is extruaed about the post 16 within the cavity 18, to form an acid-resistant seal bona 3 between the case 14 and the post 16.
- The third stage seal is formed by the addition of epoxy 36 into the cavity 18. This reinforcing third stage seal is capable of - withstanding internal pressures of 50 psi or more.
It should be appreciated that the disclosed unique designs overcome the problem of sulfuric acid creep. If only an epoxy-post seal system is employed, the sulfuric acid will most assuredly creep up the post (which is usually lead). This creeping phenomenon occurs chiefly because the lead electrode has an oxide coating that forms a natural pathway for the sulfuric acid to follow. Due to the corrosive nature of the sulfuric acid, e~ternal post seal components eventually fail _5- PC-6654 thereby rendering the battery useless. ~owever, by providing a multi-` staged sealing system, two im~ediate benefits are reali~ed. Firstly, ~he acid is prevented from leaking from the battery, a prime cause of battery failure. And secondly, the resulting multistaged high strength seal is pressure resistant.
While in accordance with the provisions of the statutes, there is illustrated and described herein specific embodiments of the invention, those skilled in the art will understand that changes nay be made in the - form of the invention covered by the claims and that certain features of the invention may sometimes be used to advantage without a corre-sponding use of the other features.
The invention and the manner of applying it may, perhaps, be better understood by a brief discussion of the principles underlying the invention~
Both systems 10 and 12 are designed to overcome the leakage problem encountered by small rechargeable batteries. In particular, the systems present a three stage seal assembly that is capable of ~ith-standing high internal pressures while, simultaneously, providing ~ong battery life. It is contemplated that the system 10 will be employed in larger capacity batteries whereas the system l~ may be utilized in smaller batteries since this design may be made physically smaller than the design of system 10 and thus meet the physical limitations of smaller batteries. However, the two systems lO and 12 may be used interchangeably.
The first stage seal is formed between ~he post shoulder 28 and the cavity recess 26 through the offices of the 0-ring 24. Besides serving as a first stage washer seal, the 0-ring 24 acts as a cushioning member between the post 16 and the battery case cover 14 durin~ Einal battery assembly when the battery case cover 14 is heat sealably joined to the remainder of the battery case. In ~iew of the fact that:
the compressible 0-ring 24 is exposed to a highly corrosive sulfuric acid environment, the 0-ring 24 should be made from an acid resistant material, preferably ethylene propylene copolymer.
The second stage seal is provided by the nut 32 or the screw 40.
By tightening the nut 32 or the screw 40, mastic is extruaed about the post 16 within the cavity 18, to form an acid-resistant seal bona 3 between the case 14 and the post 16.
- The third stage seal is formed by the addition of epoxy 36 into the cavity 18. This reinforcing third stage seal is capable of - withstanding internal pressures of 50 psi or more.
It should be appreciated that the disclosed unique designs overcome the problem of sulfuric acid creep. If only an epoxy-post seal system is employed, the sulfuric acid will most assuredly creep up the post (which is usually lead). This creeping phenomenon occurs chiefly because the lead electrode has an oxide coating that forms a natural pathway for the sulfuric acid to follow. Due to the corrosive nature of the sulfuric acid, e~ternal post seal components eventually fail _5- PC-6654 thereby rendering the battery useless. ~owever, by providing a multi-` staged sealing system, two im~ediate benefits are reali~ed. Firstly, ~he acid is prevented from leaking from the battery, a prime cause of battery failure. And secondly, the resulting multistaged high strength seal is pressure resistant.
While in accordance with the provisions of the statutes, there is illustrated and described herein specific embodiments of the invention, those skilled in the art will understand that changes nay be made in the - form of the invention covered by the claims and that certain features of the invention may sometimes be used to advantage without a corre-sponding use of the other features.
Claims (7)
1. In combination with a battery, the battery including case and at least one terminal post projecting through the case, a post seal system for preventing gas pressure leakage and electrolyte leakage about the post, the system comprising a recessed cavity formed within the case, the cavity including a bore communicating with the interior of the battery, the post extending through the bore, first sealing means disposed between the post and the bore, a sealant-containing member threadably engaging the post within the cavity the member in sealing registry with the bore, cavity and post, second sealing means disposed within the cavity for sealing the cavity and means for connecting the post to external electrical components
2. The combination according to claim 1 wherein the member includes an extrudable sulfuric acid-resistant mastic sealant.
3. The combination according to claim 2 wherein the member is a self-threading nut.
4. The combination according to claim 2 wherein the post includes a recessed opening, the member being a screw and the screw threadably disposed within the post.
5. The combination according to claim 1 wherein the first sealing means is a sulfuric acid-resistant O-ring disposed between the post and the bore.
6. The combination according to claim 5 wherein the O-ring is made from ethylene propylene copolymer.
7. The combination according to claim 1 wherein the second sealing means is made from epoxy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/071,135 US4245014A (en) | 1979-08-30 | 1979-08-30 | High pressure post seal for batteries |
| US71,135 | 1979-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1141433A true CA1141433A (en) | 1983-02-15 |
Family
ID=22099461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000353965A Expired CA1141433A (en) | 1979-08-30 | 1980-06-13 | High pressure post seal for batteries |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4245014A (en) |
| EP (1) | EP0025661A1 (en) |
| JP (1) | JPS5636857A (en) |
| CA (1) | CA1141433A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331748A (en) * | 1980-12-03 | 1982-05-25 | Hardigg Industries, Inc. | Sliding seal battery cover |
| US4565093A (en) * | 1981-10-05 | 1986-01-21 | Medtronic, Inc. | Method for facilitating hermeticity leakage testing of an electrical feedthrough |
| US4460664A (en) * | 1981-10-05 | 1984-07-17 | Medtronic, Inc. | Electrochemical cell for facilitating hermeticity leakage testing of an electrical feedthrough |
| DE3210159C2 (en) * | 1982-03-19 | 1984-02-09 | Accumulatorenfabrik Sonnenschein GmbH, 6470 Büdingen | Gas- and liquid-tight pole seal |
| GB2133609A (en) * | 1983-01-12 | 1984-07-25 | Chloride Group Plc | Electric storage cells |
| US4522900A (en) * | 1983-11-01 | 1985-06-11 | Santiago Mejia | Battery cell |
| 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 |
| US5851695A (en) * | 1992-02-10 | 1998-12-22 | C & D Technologies, Inc. | Recombinant lead-acid cell and long life battery |
| US5380603A (en) * | 1993-03-12 | 1995-01-10 | Hawker Energy Products, Inc. | Battery terminal seal |
| GB2335305B (en) * | 1998-03-12 | 2000-10-18 | Hawker Energy Products Limited | Battery |
| US6806000B2 (en) * | 2002-05-01 | 2004-10-19 | C&D Charter Holdings, Inc. | Post seal for lead acid batteries |
| US20050238955A1 (en) * | 2004-04-26 | 2005-10-27 | Hooke John W | Battery and battery terminal structure and method of manufacture |
| US10056598B2 (en) * | 2014-08-26 | 2018-08-21 | Johnson Controls Technology Company | Recessed terminal in module body |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA583233A (en) * | 1959-09-15 | C. Blake Ivan | Battery terminal assembly and method of sealing same | |
| GB191416509A (en) * | 1914-07-10 | 1915-05-06 | Orlando Oldham | Improvements in, or relating to, Secondary Galvanic Batteries. |
| US1451348A (en) * | 1922-02-01 | 1923-04-10 | William H Thorpe | Storage battery |
| GB321681A (en) * | 1928-08-15 | 1929-11-15 | Samuel Charles Whaite | Improvements in or relating to electric storage batteries or electric accumulators |
| US2781414A (en) * | 1952-07-03 | 1957-02-12 | Elgin Nat Watch Co | Electrical energy producing cells and method of making the same |
| GB744277A (en) * | 1953-09-10 | 1956-02-01 | Oldham & Son Ltd | An improved acid-tight joint for electrical storage batteries and method of producing the same |
| FR1525364A (en) * | 1967-04-07 | 1968-05-17 | Fr Des Procedes Oldham Soc | Advanced accumulator battery |
| 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 |
| FR2295577A1 (en) * | 1974-12-21 | 1976-07-16 | Varta Batterie | POLAR PART FOR ACCUMULATORS |
| US4053686A (en) * | 1975-07-03 | 1977-10-11 | General Battery Corporation | Epoxy sealed lead battery probe |
| GB1547089A (en) * | 1977-03-02 | 1979-06-06 | Chloride Group Ltd | Battery terminals |
-
1979
- 1979-08-30 US US06/071,135 patent/US4245014A/en not_active Expired - Lifetime
-
1980
- 1980-06-13 CA CA000353965A patent/CA1141433A/en not_active Expired
- 1980-07-03 JP JP9002380A patent/JPS5636857A/en active Pending
- 1980-08-29 EP EP80303026A patent/EP0025661A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0025661A1 (en) | 1981-03-25 |
| US4245014A (en) | 1981-01-13 |
| JPS5636857A (en) | 1981-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |