CA1150767A - Safety valve means for battery - Google Patents
Safety valve means for batteryInfo
- Publication number
- CA1150767A CA1150767A CA000353335A CA353335A CA1150767A CA 1150767 A CA1150767 A CA 1150767A CA 000353335 A CA000353335 A CA 000353335A CA 353335 A CA353335 A CA 353335A CA 1150767 A CA1150767 A CA 1150767A
- Authority
- CA
- Canada
- Prior art keywords
- plate
- thin plate
- battery
- thin
- lid
- 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
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008961 swelling Effects 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1624—Destructible or deformable element controlled
- Y10T137/1632—Destructible element
- Y10T137/1692—Rupture disc
- Y10T137/1714—Direct pressure causes disc to burst
- Y10T137/1729—Dome shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1624—Destructible or deformable element controlled
- Y10T137/1632—Destructible element
- Y10T137/1692—Rupture disc
- Y10T137/1759—Knife or cutter causes disc to break
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1624—Destructible or deformable element controlled
- Y10T137/1632—Destructible element
- Y10T137/1774—With counterbalancing element
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Abstract:
The present application discloses a safety valve means for a battery comprising a lid plate having therein a valve hole, a thin plate overlapped on the lid plate for closing the valve hole, a terminal plate in a reverse dish shape overlapped on the thin plate and having a gas removing hole and a downwardly projected cutter means and forming a valve chamber together with the thin plate, a holding means for holding the periphery of the thin plate between the lid plate and the terminal plate by caulking the turning edge of the lid plate or the terminal plate and an annular resilient member disposed between the thin plate and the terminal plate and pressed by the terminal plate to press the thin plate. According to the safety valve means for a battery of the present invention, when the periphery of the thin plate is held by and between the lid plate and the terminal plate, the holding pressure is adapted to be absorbed by the annular resilient member, thereby to restrain bending of the thin plate which otherwise results from the holding pressure above-mentioned. Therefore, the thin plate may be located at a predetermined position, whereby highly reliable safety valve having high precision may be obtained.
The present application discloses a safety valve means for a battery comprising a lid plate having therein a valve hole, a thin plate overlapped on the lid plate for closing the valve hole, a terminal plate in a reverse dish shape overlapped on the thin plate and having a gas removing hole and a downwardly projected cutter means and forming a valve chamber together with the thin plate, a holding means for holding the periphery of the thin plate between the lid plate and the terminal plate by caulking the turning edge of the lid plate or the terminal plate and an annular resilient member disposed between the thin plate and the terminal plate and pressed by the terminal plate to press the thin plate. According to the safety valve means for a battery of the present invention, when the periphery of the thin plate is held by and between the lid plate and the terminal plate, the holding pressure is adapted to be absorbed by the annular resilient member, thereby to restrain bending of the thin plate which otherwise results from the holding pressure above-mentioned. Therefore, the thin plate may be located at a predetermined position, whereby highly reliable safety valve having high precision may be obtained.
Description
Safety valve means for battery Field of the Invention The present invention relates to a safety valve means for battery in which, if inner pressure within a battery is increased due to internal short-circuit or the like, a thin plate disposed for hermetically sealing the battery is adapted to be bent to come in contact with a cutter means and is then broken, so that gas within the battery is dis-charged to the air, thereby to prevent the battery from being broken.
Brief Description of the Drawings The prior art is discussed below with reference to the drawings. To assist with the understanding of the discussion, each figure of the dra~ings is first briefly discussed below:
Fig. l is a section view of a conventional safety valve means for battery;
Fig. 2 is a section view of a first embodiment of a safety valve means for battery in accordance with the present invention;
Fig. 3 is a disassembled perspective view of a closure cover in Fig. 2;
Fig. 4 is a section view of another example of a thin plate in Fig. 2;
Fig. 5 is a section view of a further example of the thin plate in Fig. 2;
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Fig. 6 is a section view of a second embodiment of a safety valve means for battery in accordance with the present invention; and Fig. 7 is a perspective view of a portion of the second embodiment in Fig. 6.
Background of the Invention . .
A conventional safety valve means for battery is con-structed as shown in Fig. 1.
In Fig. 1, a lid plate 2 has therein a valve hole 1 and a thin plate 3 is overlapped on the lid plate 2 for covering the valve hole 1. A terminal plate 4 is formed in the reverse dish shape and is overlapped on the thin plate 3. A turning edge S at the periphery of the lid plate 2 is caulked so that the peripheral edge of the thin plate 3 is held between the lid plate 2 and the terminal plate 4.
The terminal plate 4 has therein a gas removing hole 6 and a portion of the terminal plate 4 is downwardly turned to form a cutter means 7-. The thin plate 3 and the terminal plate 4 constitute a valve chamber 8. The lid plate 2, the thin plate 3 and the terminal plate 4 consti-tute a closure cover 9.
The closure cover 9 is inserted, through insulating packing 12, into the opening of an outer case 11 incorporat-ing an electrode assembly 10. The opening edge 13 of theouter case 11 is inwardly turned so that the closure cover ~&
76~7 9 is mounted to the outer case 11 in an air- and liquid-tight manner.
In assembling the closure cover 9 of such conventional structure, when the peripheral turning edge of the lid S plate 2 is caulked, there is a case where the thin plate 3 is upwardly bent at the center portion thereof as shown in Fig. 1, due to caulking pressure. This may cause the thin plate 3 to come in contact with the cutter means 7, so that the thin plate 3 is broken. On the other hand, even if the thin plate 3 does not come in contact with the cutter means 7 at the assembling, owing to the swelling of the thin plate 3 due to such bent, the thin plate 3 comes in con-tact with the cutter means 7 and is broken before the gas pressure in the battery reaches a predetermirled value.
Furthermore, since bent conditions of thin plates are not uniform in conventional respective batteries, gas pressure to cause the thin plates to be broken is not constant.
Thus, such conventional safety valve means lacks reliability.
Disclosure of the Invention _ According to the invention there is provided a safety valve means for sealing an end of a battery casing using:
a lid plate having a valve hole in the center thereof;
a thin plate overlying said lid plate for covering said valve hole; a terminal plate of reverse dish shape having '~'`
,:
76~7 a periphery overlying the periphery of said thin plate and also having a gas vent and a downwardly projecting cutter means at the center of said terminal plate, said terminal plate forming a valve chamber together with said thin plate, the periphery of said lid plate, the periphery of said thin plate and the periphery of said terminal plate overlying each other to form a three-layer portion; means for holding the periphery of said thin plate between the peripheries of said lid plate and said terminal plate by caulking the peripheral turning edge of said lid plate or said terminal plate; and an annular resilient member disposed between said terminal plate and said thin plate inside with respect to said three-layer portion and pressed by said terminal plate to press said thin plate toward said lid plate, thereby to ~ix, between said lid plate and said terminal plate, the portion of said thin plate which is located inside with respect to said three-layer portion.
The present invention provides a safety valve means for a battery having improved precision and reliability.
Detailed Description of Preferred EmbodimentS
The description hereinafter will discuss a first embodiment of a safety valve means for battery in accord-ance with the present invention, with reference to Figs.
Brief Description of the Drawings The prior art is discussed below with reference to the drawings. To assist with the understanding of the discussion, each figure of the dra~ings is first briefly discussed below:
Fig. l is a section view of a conventional safety valve means for battery;
Fig. 2 is a section view of a first embodiment of a safety valve means for battery in accordance with the present invention;
Fig. 3 is a disassembled perspective view of a closure cover in Fig. 2;
Fig. 4 is a section view of another example of a thin plate in Fig. 2;
Fig. 5 is a section view of a further example of the thin plate in Fig. 2;
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716~
Fig. 6 is a section view of a second embodiment of a safety valve means for battery in accordance with the present invention; and Fig. 7 is a perspective view of a portion of the second embodiment in Fig. 6.
Background of the Invention . .
A conventional safety valve means for battery is con-structed as shown in Fig. 1.
In Fig. 1, a lid plate 2 has therein a valve hole 1 and a thin plate 3 is overlapped on the lid plate 2 for covering the valve hole 1. A terminal plate 4 is formed in the reverse dish shape and is overlapped on the thin plate 3. A turning edge S at the periphery of the lid plate 2 is caulked so that the peripheral edge of the thin plate 3 is held between the lid plate 2 and the terminal plate 4.
The terminal plate 4 has therein a gas removing hole 6 and a portion of the terminal plate 4 is downwardly turned to form a cutter means 7-. The thin plate 3 and the terminal plate 4 constitute a valve chamber 8. The lid plate 2, the thin plate 3 and the terminal plate 4 consti-tute a closure cover 9.
The closure cover 9 is inserted, through insulating packing 12, into the opening of an outer case 11 incorporat-ing an electrode assembly 10. The opening edge 13 of theouter case 11 is inwardly turned so that the closure cover ~&
76~7 9 is mounted to the outer case 11 in an air- and liquid-tight manner.
In assembling the closure cover 9 of such conventional structure, when the peripheral turning edge of the lid S plate 2 is caulked, there is a case where the thin plate 3 is upwardly bent at the center portion thereof as shown in Fig. 1, due to caulking pressure. This may cause the thin plate 3 to come in contact with the cutter means 7, so that the thin plate 3 is broken. On the other hand, even if the thin plate 3 does not come in contact with the cutter means 7 at the assembling, owing to the swelling of the thin plate 3 due to such bent, the thin plate 3 comes in con-tact with the cutter means 7 and is broken before the gas pressure in the battery reaches a predetermirled value.
Furthermore, since bent conditions of thin plates are not uniform in conventional respective batteries, gas pressure to cause the thin plates to be broken is not constant.
Thus, such conventional safety valve means lacks reliability.
Disclosure of the Invention _ According to the invention there is provided a safety valve means for sealing an end of a battery casing using:
a lid plate having a valve hole in the center thereof;
a thin plate overlying said lid plate for covering said valve hole; a terminal plate of reverse dish shape having '~'`
,:
76~7 a periphery overlying the periphery of said thin plate and also having a gas vent and a downwardly projecting cutter means at the center of said terminal plate, said terminal plate forming a valve chamber together with said thin plate, the periphery of said lid plate, the periphery of said thin plate and the periphery of said terminal plate overlying each other to form a three-layer portion; means for holding the periphery of said thin plate between the peripheries of said lid plate and said terminal plate by caulking the peripheral turning edge of said lid plate or said terminal plate; and an annular resilient member disposed between said terminal plate and said thin plate inside with respect to said three-layer portion and pressed by said terminal plate to press said thin plate toward said lid plate, thereby to ~ix, between said lid plate and said terminal plate, the portion of said thin plate which is located inside with respect to said three-layer portion.
The present invention provides a safety valve means for a battery having improved precision and reliability.
Detailed Description of Preferred EmbodimentS
The description hereinafter will discuss a first embodiment of a safety valve means for battery in accord-ance with the present invention, with reference to Figs.
2 and 3.
A metallic lid plate 14 has a valve hole 15 at the , ~5~767 - 4a -center portion thereof. A turning edge 16 is formed by turning upwardly the periphery of the lid plate 14. A
thin plate 17 made of a synthetic resin plate or a me-tallic plate is overlapped on the lid plate 14 to cover the valve hole 15. A metallic terminal plate 18 formed in the reverse dish shape is overlapped on the thin plate 17. A gas removing hole l9 is formed in the terminal plate 18 at the center portion thereof. The terminal plate 18 has a cutter means 20 which is formed by down-wardly turning a portion cut out from the terminal plate 18. A valve chamber 21 is constituted by the lid plate 14 and the terminal plate 18. An annular resilient member 22 is fitted into the concaved portion of the terminal plate 18.
When the turning edge 16 of the lid plate 14 is inwardly '~ ' " ' .. ~
. .
~5~76~
caulke~ the thin plate 17 is pressed by the annular resilient member 22 pressed by the terminal plate 18 and the thin plate 17 is held by and between the periphery of the lid plate 14 and the periphery of the terminal plate 18. Thus, a closure cover 23 is constituted by the lid plate 14, the thin plate 17, the terminal plate 18 and the annular resilient member 22.
The closure cover 23 is fitted, through insulating packing 26, into the opening of an outer case 25 incorporating an electrode assembly 24. ~he opening edge 27 of the outer case 25 i5 inwardly turned, so that the closure cover 23 is mounted to the outer case ~5 in an air-tight and liquid-tight manner.
With such arrangement, one electrode of the electrode as~embly 24 is:.electrically connected to .the .outer...case 25j :and the other electrode of the eiectrode assembly 24 iB electrically connected to the terminal plate 18 through a conductor member 28 and the lid plate 14.
The description will then discuss the operation of the safety valve means above-mentioned.
If gas pressure in a battery is increased due to short-circl~it or the like within the battery, the thin plate 17 is adapted to be upwardly bent as shown by broken lines in Fig. 2.
When such gas pressure then reaches a predetermined value, th`e thin plate 17 comes in contact with the cutter means 20.
The thin plate 17 is then broken, so that gas in the battery ., is discharged to the air from the gas removing hole 19 through the valve hole 15 and the valve chamber 21, thereby to prevent the battery from being broken.
At the time of assembling the closure cover 23 in the embodiment shown in Fig. 2, when the turning edge 16 of the lid plate 14 is caulked, pressure generated at such caulking may be absorbed by the annular resilient member 22, since the thin plate 17 is pressed by the annular resilient member 22 pressed by the terminal plate 18. As the result, the occurrence of bent of the thin plate 17 which is resulted from the pressure above-mentioned, may be restrained. Consequently, the thin plate 17 may be located at a predetermined position, so that a highly reliable safety valve may be provided.
Furthermore, strong sticking of the lid plate 14 to the thin plate 17 may be maintained.
Moreover, since the annular resilient member 22 is disposed in a compres~ed manner between the thin plate 17 and the terminal plate 18, it is possihle to prevent the electrolyte from leaking along the abutment surfaces of the annular resilient member 22 and the terminal plate 18.
The description hereinafter will discuss another examples of the thin plate, with reference to Figs. 4 and 5.
In Fig. 4, a thin plate 2g is made of-composite material comprising a metallic layer 30 and a synthetic resin layer 31 formed thereon.
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In Fig. 5, a thin plate 32 is made of composite material comprising a metallic layer 33 and synthetic resin layers 34 and 35 formed on and below the metallic layer 33.
For such metallic layer 30 or 33, a resilient metallic thin plate made of, for example, aluminium or stainless steel may be used.
The thin plate ~9 shown in Fig. 4 is formed by sticking a metallic thin plate and a synthetic resin thin plate together with adhesives having an anti-electrolyte property.
The thin plate 32 shown in Fig. 5 is a metallic lamination formed by coating a synthetic resin such as polyethylene and polypropylene, on a metallic thin plate.
The number of laminated metallic and synthetlc resin layers is not limited to 2 or 3 as in the case mentioned earlier, but may be 4 or more as f.ar as such laminated layers are securely cut with the c:utter means 20 when gas pressure in the battery reaches a predetermined value.
When the thin plate is made of composite material comprising a metallic layer and synthetic layers as shown in Figs. 4 and 5, such thin plate may completely prevent gas or moisture contained in the air which is entered into the valve chamber 21 from the gas removing hole 19 in the terminal plate 18, from entering into the inside of the battery. Furthermore, the synthetic layer or layers may provide strong sticking of such thin plate to the lid plate .
., ' '~ ~
7i~7 14 and the terminal plate 18, thereby to prevent the electrolyte from leaking along the abutment surfaces of these plates 14, 17 and 18.
The description hereinafter will discuss a second embodiment of the safety valve means for battery in accordance with the prasent invention, with reference to Figs. 6 and 7.
In this second embodiment, like parts are designated by like numerals used in Fig. 2.
The second embodiment is different from the first embodiment in that the thin plate 17 and the annular resilient member 22 in Fig. 2 are :integrally constructed with each other in Fig. 6.
In Fig. 6, a thin plate 38 comprises a flange 36 to be held by and between a lid plate 14 and a terminal plate 18, and a thin layer portion 3i for closing a valve hole 15.
An annular resilient member 39 is formed on and integrally with the thin plate 38, and these annular resilient member 39 and the thin plate 38 are made of, for example, a poly-propylene resin.
Such safety valve means shown in Figs. 6 and 7 will perform an operatio~ same as that of the first embodiment shown in Fig. 2. __ Industrial Utility According to the safety valve means for battery of the .
present invention, when the periphery of the thin plate is held between the lid plate and the terminal plate by the holding means, holding pressure may be absorbed by the annular resilient member, thereby to restrain the occurrence of bent of the thin plate which is otherwise resulted from such pressure. Conse~uently, the thin plate may be located at a predetermined position, whereby a highly reliable safety valve having high precision may be provided.
Furthermore, it is possible to maintain strong sticking of the lid plate to the thin plate.
Moreover, since the annular resilient member is disposed between the thin plate and the terminal plate in the valve chamber in a compressed manner, it is possible to prevent the electrolyte from leaking along the abutment surfaces of the annular resilient member and the terminal plate.
~ _ 9 _ ~
A metallic lid plate 14 has a valve hole 15 at the , ~5~767 - 4a -center portion thereof. A turning edge 16 is formed by turning upwardly the periphery of the lid plate 14. A
thin plate 17 made of a synthetic resin plate or a me-tallic plate is overlapped on the lid plate 14 to cover the valve hole 15. A metallic terminal plate 18 formed in the reverse dish shape is overlapped on the thin plate 17. A gas removing hole l9 is formed in the terminal plate 18 at the center portion thereof. The terminal plate 18 has a cutter means 20 which is formed by down-wardly turning a portion cut out from the terminal plate 18. A valve chamber 21 is constituted by the lid plate 14 and the terminal plate 18. An annular resilient member 22 is fitted into the concaved portion of the terminal plate 18.
When the turning edge 16 of the lid plate 14 is inwardly '~ ' " ' .. ~
. .
~5~76~
caulke~ the thin plate 17 is pressed by the annular resilient member 22 pressed by the terminal plate 18 and the thin plate 17 is held by and between the periphery of the lid plate 14 and the periphery of the terminal plate 18. Thus, a closure cover 23 is constituted by the lid plate 14, the thin plate 17, the terminal plate 18 and the annular resilient member 22.
The closure cover 23 is fitted, through insulating packing 26, into the opening of an outer case 25 incorporating an electrode assembly 24. ~he opening edge 27 of the outer case 25 i5 inwardly turned, so that the closure cover 23 is mounted to the outer case ~5 in an air-tight and liquid-tight manner.
With such arrangement, one electrode of the electrode as~embly 24 is:.electrically connected to .the .outer...case 25j :and the other electrode of the eiectrode assembly 24 iB electrically connected to the terminal plate 18 through a conductor member 28 and the lid plate 14.
The description will then discuss the operation of the safety valve means above-mentioned.
If gas pressure in a battery is increased due to short-circl~it or the like within the battery, the thin plate 17 is adapted to be upwardly bent as shown by broken lines in Fig. 2.
When such gas pressure then reaches a predetermined value, th`e thin plate 17 comes in contact with the cutter means 20.
The thin plate 17 is then broken, so that gas in the battery ., is discharged to the air from the gas removing hole 19 through the valve hole 15 and the valve chamber 21, thereby to prevent the battery from being broken.
At the time of assembling the closure cover 23 in the embodiment shown in Fig. 2, when the turning edge 16 of the lid plate 14 is caulked, pressure generated at such caulking may be absorbed by the annular resilient member 22, since the thin plate 17 is pressed by the annular resilient member 22 pressed by the terminal plate 18. As the result, the occurrence of bent of the thin plate 17 which is resulted from the pressure above-mentioned, may be restrained. Consequently, the thin plate 17 may be located at a predetermined position, so that a highly reliable safety valve may be provided.
Furthermore, strong sticking of the lid plate 14 to the thin plate 17 may be maintained.
Moreover, since the annular resilient member 22 is disposed in a compres~ed manner between the thin plate 17 and the terminal plate 18, it is possihle to prevent the electrolyte from leaking along the abutment surfaces of the annular resilient member 22 and the terminal plate 18.
The description hereinafter will discuss another examples of the thin plate, with reference to Figs. 4 and 5.
In Fig. 4, a thin plate 2g is made of-composite material comprising a metallic layer 30 and a synthetic resin layer 31 formed thereon.
7~
In Fig. 5, a thin plate 32 is made of composite material comprising a metallic layer 33 and synthetic resin layers 34 and 35 formed on and below the metallic layer 33.
For such metallic layer 30 or 33, a resilient metallic thin plate made of, for example, aluminium or stainless steel may be used.
The thin plate ~9 shown in Fig. 4 is formed by sticking a metallic thin plate and a synthetic resin thin plate together with adhesives having an anti-electrolyte property.
The thin plate 32 shown in Fig. 5 is a metallic lamination formed by coating a synthetic resin such as polyethylene and polypropylene, on a metallic thin plate.
The number of laminated metallic and synthetlc resin layers is not limited to 2 or 3 as in the case mentioned earlier, but may be 4 or more as f.ar as such laminated layers are securely cut with the c:utter means 20 when gas pressure in the battery reaches a predetermined value.
When the thin plate is made of composite material comprising a metallic layer and synthetic layers as shown in Figs. 4 and 5, such thin plate may completely prevent gas or moisture contained in the air which is entered into the valve chamber 21 from the gas removing hole 19 in the terminal plate 18, from entering into the inside of the battery. Furthermore, the synthetic layer or layers may provide strong sticking of such thin plate to the lid plate .
., ' '~ ~
7i~7 14 and the terminal plate 18, thereby to prevent the electrolyte from leaking along the abutment surfaces of these plates 14, 17 and 18.
The description hereinafter will discuss a second embodiment of the safety valve means for battery in accordance with the prasent invention, with reference to Figs. 6 and 7.
In this second embodiment, like parts are designated by like numerals used in Fig. 2.
The second embodiment is different from the first embodiment in that the thin plate 17 and the annular resilient member 22 in Fig. 2 are :integrally constructed with each other in Fig. 6.
In Fig. 6, a thin plate 38 comprises a flange 36 to be held by and between a lid plate 14 and a terminal plate 18, and a thin layer portion 3i for closing a valve hole 15.
An annular resilient member 39 is formed on and integrally with the thin plate 38, and these annular resilient member 39 and the thin plate 38 are made of, for example, a poly-propylene resin.
Such safety valve means shown in Figs. 6 and 7 will perform an operatio~ same as that of the first embodiment shown in Fig. 2. __ Industrial Utility According to the safety valve means for battery of the .
present invention, when the periphery of the thin plate is held between the lid plate and the terminal plate by the holding means, holding pressure may be absorbed by the annular resilient member, thereby to restrain the occurrence of bent of the thin plate which is otherwise resulted from such pressure. Conse~uently, the thin plate may be located at a predetermined position, whereby a highly reliable safety valve having high precision may be provided.
Furthermore, it is possible to maintain strong sticking of the lid plate to the thin plate.
Moreover, since the annular resilient member is disposed between the thin plate and the terminal plate in the valve chamber in a compressed manner, it is possible to prevent the electrolyte from leaking along the abutment surfaces of the annular resilient member and the terminal plate.
~ _ 9 _ ~
Claims (8)
1. A safety valve means for sealing an end of a battery casing using:
a lid plate having a valve hole in the center thereof;
a thin plate overlying said lid plate for covering said valve hole;
a terminal plate of reverse dish shape having a periphery overlying the periphery of said thin plate and also having a gas vent and a downwardly projecting cutter means at the center of said terminal plate, said terminal plate forming a valve chamber together with said thin plate, the periphery of said lid plate, the periphery of said thin plate and the periphery of said terminal plate overlying each other to form a three-layer portion;
means for holding the periphery of said thin plate between the peripheries of said lid plate and said ter-minal plate by caulking the peripheral turning edge of said lid plate or said terminal plate; and an annular resilient member disposed between said terminal plate and said thin plate inside with respect to said three-layer portion and pressed by said terminal plate to press said thin plate toward said lid plate, thereby to fix, between said lid plate and said terminal plate, the portion of said thin plate which is located inside with respect to said three-layer portion.
a lid plate having a valve hole in the center thereof;
a thin plate overlying said lid plate for covering said valve hole;
a terminal plate of reverse dish shape having a periphery overlying the periphery of said thin plate and also having a gas vent and a downwardly projecting cutter means at the center of said terminal plate, said terminal plate forming a valve chamber together with said thin plate, the periphery of said lid plate, the periphery of said thin plate and the periphery of said terminal plate overlying each other to form a three-layer portion;
means for holding the periphery of said thin plate between the peripheries of said lid plate and said ter-minal plate by caulking the peripheral turning edge of said lid plate or said terminal plate; and an annular resilient member disposed between said terminal plate and said thin plate inside with respect to said three-layer portion and pressed by said terminal plate to press said thin plate toward said lid plate, thereby to fix, between said lid plate and said terminal plate, the portion of said thin plate which is located inside with respect to said three-layer portion.
2. A safety valve means for battery as set forth in Claim 1, wherein the thin plate is formed independently from the annular resilient member.
3. A safety valve means for battery as set forth in Claim 1, wherein the thin plate comprises a flange to be held by and between the peripheries of the lid plate and the terminal plate and a thin layer portion for covering the valve hole of the lid plate, and said thin plate and the annular resilient member are formed in an unitary construction.
4. A safety valve means for battery as set forth in Claim 1, wherein the holding means is formed by caulking the respective peripheries of the thin plate and the terminal plate with the peripheral turning edge of the lid plate.
5. A safety valve means for battery as set forth in Claim 1, wherein the thin plate is made of a synthetic resin plate.
6. A safety valve means for battery as set forth in Claim 2, wherein the thin plate is made of a metallic plate.
7. A safety valve means for battery as set forth in Claim 2, wherein the thin plate is made of composite material comprising a metallic layer and at least one synthetic resin layer.
8. A safety valve means for battery as set forth in Claim 7, wherein the thin plate is made of a metallic lamination.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54-77862/1979 | 1979-06-07 | ||
| JP7786279U JPS5919330Y2 (en) | 1979-06-07 | 1979-06-07 | battery safety valve device |
| JP9265779U JPS6020282Y2 (en) | 1979-07-04 | 1979-07-04 | battery safety valve device |
| JP54-92657/1979 | 1979-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1150767A true CA1150767A (en) | 1983-07-26 |
Family
ID=26418916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000353335A Expired CA1150767A (en) | 1979-06-07 | 1980-06-04 | Safety valve means for battery |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4345611A (en) |
| CA (1) | CA1150767A (en) |
| DE (1) | DE3021426C2 (en) |
| FR (1) | FR2458912A1 (en) |
| GB (1) | GB2052137B (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK95481A (en) * | 1981-03-03 | 1982-09-04 | Hellesens As | HERMETIC CLOSED BATTERY WITH SAFETY EXPLOSION SAFETY MECHANISM |
| US4795051A (en) * | 1982-05-24 | 1989-01-03 | Rs&B Safety Systems, Inc. | Rupturable fluid pressure relief apparatus and manufacturing method |
| DE3310782C1 (en) * | 1983-03-24 | 1984-07-19 | Siemens AG, 1000 Berlin und 8000 München | Safety device against inadmissible pressure in a container |
| JPS59224049A (en) * | 1983-04-11 | 1984-12-15 | ジ−テイ−イ−・コミユニケイシヨンズ・プロダクツ・コ−ポレイシヨン | Electrochemical battery |
| US5080984A (en) * | 1983-06-17 | 1992-01-14 | Gates Energy Products, Inc. | Radial seal for an electrochemical cell and method of making same |
| US4523376A (en) * | 1983-06-17 | 1985-06-18 | General Electric Company | Method for sealing a rechargable cell |
| US4581304A (en) * | 1984-11-14 | 1986-04-08 | Union Carbide Corporation | Thermoformed film member vent for galvanic cells |
| US4832224A (en) * | 1985-05-22 | 1989-05-23 | Nippon Tansan Gas Co., Ltd. | High pressure gas cartridges with a double safety device |
| US4803136A (en) * | 1985-09-30 | 1989-02-07 | Emerson Electric Co. | Method of manufacturing a safety vented container and product |
| US4783383A (en) * | 1986-12-02 | 1988-11-08 | Sanyo Electric Co., Ltd. | Sealed type battery provided with safety valve means and method of manufacturing same |
| JPH07107840B2 (en) * | 1989-08-29 | 1995-11-15 | 松下電器産業株式会社 | Organic electrolyte battery |
| JPH0729557A (en) * | 1993-07-12 | 1995-01-31 | Fuji Photo Film Co Ltd | Nonaqueous battery |
| WO2004088773A1 (en) * | 1993-07-22 | 2004-10-14 | Kenichi Miyamoto | Hermetically sealed battery |
| EP0739047A3 (en) * | 1995-04-21 | 1999-04-07 | Wako Electronics Co., Ltd. | Safety device for use in secondary battery |
| KR970054707A (en) * | 1995-12-22 | 1997-07-31 | 배순훈 | Upper Cap Structure of Lithium Battery |
| KR100202928B1 (en) * | 1996-03-30 | 1999-06-15 | 전주범 | Safety Device for Organic Electrolyte Battery |
| JPH11154504A (en) * | 1997-11-20 | 1999-06-08 | Alps Electric Co Ltd | Pressure cutoff sensor |
| JP2001229903A (en) * | 2000-02-15 | 2001-08-24 | Sony Corp | Non-aqueous electrolyte battery and method of manufacturing the same |
| KR20050037689A (en) * | 2003-10-20 | 2005-04-25 | 삼성에스디아이 주식회사 | Secondary battery with vents located at optimum positions |
| US20050196665A1 (en) * | 2004-02-23 | 2005-09-08 | Matsushita Electric Industrial Co., Ltd. | Battery, battery pack, method for manufacturing the battery, and method for manufacturing the battery pack |
| US7833647B2 (en) * | 2004-04-28 | 2010-11-16 | Eveready Battery Company, Inc. | Closure vent seal and assembly |
| US7687189B2 (en) * | 2004-04-28 | 2010-03-30 | Eveready Battery Company, Inc. | Housing for a sealed electrochemical battery cell |
| GB0519834D0 (en) * | 2005-09-29 | 2005-11-09 | Elfab Ltd | Bursting disc assembly |
| US8147999B2 (en) * | 2008-06-11 | 2012-04-03 | Eveready Battery Company, Inc. | Closure assembly with low vapor transmission for electrochemical cell |
| KR101136274B1 (en) * | 2010-07-01 | 2012-04-19 | 삼성에스디아이 주식회사 | Secondary battery |
| DE102011080325A1 (en) * | 2011-08-03 | 2013-02-07 | Elringklinger Ag | Pressure equalization device for a housing of an electrochemical device |
| CN105228896B (en) * | 2012-11-12 | 2018-01-05 | 托奇多有限责任公司 | Boat with electric drive and emergency stop switch |
| DE102013215552A1 (en) * | 2013-08-07 | 2015-02-12 | Robert Bosch Gmbh | Pressure release device for protecting a battery system or a galvanic cell against damaging overpressure and battery system, galvanic cell and cell cover with a pressure release device |
| CN108847500B (en) * | 2018-05-11 | 2021-08-06 | 南阳市龙润装备制造有限公司 | Preparation method of battery explosion-proof sheet |
| US12100855B2 (en) | 2022-02-04 | 2024-09-24 | Mann+Hummel Gmbh | Hermetically closed battery degas venting unit for a battery enclosure/pack/housing |
| CN119790534A (en) * | 2022-09-07 | 2025-04-08 | 唐纳森公司 | Rupture valve |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB504748A (en) * | 1937-10-30 | 1939-05-01 | Dubilier Condenser Co 1925 Ltd | Improvements in or relating to electric condensers |
| BE545486A (en) * | 1955-02-28 | |||
| GB951101A (en) * | 1959-05-06 | 1964-03-04 | Lyons & Co Ltd J | Improvements in and relating to fluid control valves |
| US3062910A (en) * | 1961-03-09 | 1962-11-06 | Gould National Batteries Inc | Sealing and pressure relief device for galvanic cells |
| US3155271A (en) * | 1963-07-05 | 1964-11-03 | Calmec Mfg Corp | Rupture disc mounting |
| US3279953A (en) * | 1963-11-12 | 1966-10-18 | Sonotone Corp | Insulating seals for metallic sealed battery casings |
| US3262819A (en) * | 1965-06-09 | 1966-07-26 | Sonotone Corp | Sealed alkaline battery cells with excess gas pressure release |
| IL26126A (en) * | 1965-07-30 | 1970-08-19 | Tadiran Israel Elect Ind Ltd | Sealed rechargeable battery cell |
| US3698598A (en) * | 1971-07-26 | 1972-10-17 | Black Sivalls & Bryson Inc | Safety pressure relief device |
| US3845878A (en) * | 1972-11-03 | 1974-11-05 | Acf Ind Inc | Safety vent system for tanks |
| US3881629A (en) * | 1973-09-04 | 1975-05-06 | Continental Disc Corp | Self-aligning rupture disc |
| US4079854A (en) * | 1976-08-09 | 1978-03-21 | Continental Disc Corporation | Rupture disc pressure relief device |
-
1980
- 1980-06-04 CA CA000353335A patent/CA1150767A/en not_active Expired
- 1980-06-04 US US06/156,512 patent/US4345611A/en not_active Expired - Lifetime
- 1980-06-04 GB GB8018343A patent/GB2052137B/en not_active Expired
- 1980-06-06 FR FR8012667A patent/FR2458912A1/en active Granted
- 1980-06-06 DE DE3021426A patent/DE3021426C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2458912A1 (en) | 1981-01-02 |
| GB2052137B (en) | 1983-02-09 |
| DE3021426A1 (en) | 1980-12-11 |
| DE3021426C2 (en) | 1982-03-18 |
| FR2458912B1 (en) | 1982-12-17 |
| GB2052137A (en) | 1981-01-21 |
| US4345611A (en) | 1982-08-24 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |