CA1180753A - Battery - Google Patents
BatteryInfo
- Publication number
- CA1180753A CA1180753A CA000413761A CA413761A CA1180753A CA 1180753 A CA1180753 A CA 1180753A CA 000413761 A CA000413761 A CA 000413761A CA 413761 A CA413761 A CA 413761A CA 1180753 A CA1180753 A CA 1180753A
- Authority
- CA
- Canada
- Prior art keywords
- sealing cover
- terminal pin
- ring
- battery
- flange
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 34
- 238000012856 packing Methods 0.000 claims abstract description 27
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000003792 electrolyte Substances 0.000 description 9
- 238000002788 crimping Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000003466 welding Methods 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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/12—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with flat electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a battery comprising an outer jacket can includ-ing an electrode assembly and serving as a terminal with one polarity, and a metal sealing cover covering said outer jacket can, a terminal pin of opposite polarity extending through insulating packings into an aperture in said sealing cover, said sealing cover and said packings being held between a metal washer disposed on an extended portion of said terminal pin and a flange of said terminal pin, and at least one ring-shaped projection cutting into said insulating packings, said projection being provided on at least one of said sealing cover, said flange of said terminal pin, and said metal washer, the battery thus having excellent sealing properties.
In a battery comprising an outer jacket can includ-ing an electrode assembly and serving as a terminal with one polarity, and a metal sealing cover covering said outer jacket can, a terminal pin of opposite polarity extending through insulating packings into an aperture in said sealing cover, said sealing cover and said packings being held between a metal washer disposed on an extended portion of said terminal pin and a flange of said terminal pin, and at least one ring-shaped projection cutting into said insulating packings, said projection being provided on at least one of said sealing cover, said flange of said terminal pin, and said metal washer, the battery thus having excellent sealing properties.
Description
5~
The inVentiQn ~el~tes to a battery havin~ a sealed structure and a, hi~h sealing pe~formance.
The present invention will be illustrated by way of the accompanyIng d~awings, in which:-Fig. 1 is a cross-sectioanl view of a conventional sealed battery;
Fig. 2 is an enlarged cross-sectional view of a sealed portion of the conventional sealed battery of Fig. l;
~ tg. 3 is a cross-sectional view of a sealed battery according to one embodiment of the present invention wherein a ring-shaped projection is provided on both a flange of the opposite polarity terminal pin and an aperture edge of a metal sealing cover;
Fig. 4 is a partially broken perspective view of the terminal pin of opposite.-polarity of the battery of Fig. 3 as seen from the lower part;
Fiys. 5 to 7 are cross-sectional views of sealed por-tions of batteries according to various embodiments wherein a ring-shaped projection in provided on an aperture edge of the metal sealing cover or on the metal sealing cover adjacent the aperture;
~ ig. 8 is:a cross-sectional vlew of a sealed portion of a battery accordingto ~further embodiment wherein a ring-shaped projection is provided on the flange of the termanal pin of opp~slte polarity; and Fig. 9 is a cross-sectional view of a sealed portion of a ~atter~ according to.an even further embodiment wherein a ring-shaped proiectio~ is provided only on th.e ~etal washer.
A conventiona,l sea,Led b.atter comprises a,n outer jacket can (b~ serving as a~ terminal with one polarity and includin~ an elect~ode as~e~bly (a,), ,a,nd a metal $ealing coVer (c~, as sh.own in Fi~g. 1~ Th~e sealed ba,tter~ is. provided with a sealed structure b~ inserting a terminal pin (g) with the ~V753 opposite polaxit~ into an ~e~ture (d~ of the cover (c~ th~ough insulating pack~ngs (e~ and (~), and enlarging and crimpin~ a top of an extexnal p~ojection (.hl of the terminal pin (g) ~etween a metal washer (i) disposed on the external projection (h) and an internal flange (j2 of the terminal pin (g), thereby attaching the sealin~ co~er (c~ and insulating packings (e) and (f) therebetween.
I~n such a sealed structure, however, a portion (c') adjacent the aperture (d) of the sealing cover (c) is flat making a planar contact with the respective insulating packings (e) and ~f). Therefore, even when the crimping force for the terminal- pin (g) is increased, it may be dispersed at the fla~
surface of the portion ~c~, whereby the electrolyte in the el-ectrode assembly may leak out as shown by the arrows in Fig. 2.
The present invention provides a sealed battery having a sealed structure with high sealing performance preventing undesired leakage of the electrolyte.
The present inVentlon thus provides a battery which comprises an outer jacket can serving as a terminal with one polarity and including the electrode assembly, and a metal sealing cover on the can, and which is provided with means for attachlng the sealing cover and insulating packings between a metal washer disposed on an e~tended portion of a terminal pin and a flange of the terminal pin by inserting the terminal pin of opposite polarity into an aperture of the sealing cover throu~ the insulating packings and at least one ring-shaped projection b~ting xnto the insula~ting packings diSposed on at le~St one of the ~ealing coveX~s., the flange of the terminal ~in, and the metal washex.
3Q The batter~ acco~ding to th.e pre~ent invention is characterized in that a ring-shaped p~ojection having a simple structure is provided at at least one portion of three members 75~
descxihed above to bite into the insul~ting packings. ~s a result, once the crimping force is not dispersed over the en-tire contact sux~ace between the sealing cover and the insula-ting packings and is centered at the ring-shaped projection, the sealing performance is gxeatl~ improved preventing leakaye of the electrolyte.
Such sealed batteries have been inparticular used by incorporating them into electrical appliances. According to the present invention, however, by the prevention of the leak-a~e of electrolyte, the life of the batteries will be length-ened, and undesired contact faults between the batteries and contacts of electrical appliances,the corrosion of the elect-rical appliances and the lowering of function of electrical appliances will be also prevented.
- In the battery according to the present invention at least one ring-shaped projection is provided on the metal sealing cover, the flange of the terminal pin of opposite polarity and the metal washer.
Th~s ring-shaped projection is a continuous ring-shaped projection which is provided on the surface for pressing an insulating packing if a metal sealing cover is given as an example, and its configuration is either a pointed end structure or a slightly rounded wedge-shaped structure in cross section.
Further, the height of the projection is suitably selected in such a manner that it is less than the thickness of the insul-ating packing. ~n addition, the projection can be provided by simple machining.
Battex~e~ accoxding to the present invention ~ill no~
be described w~th re~erence to the accompanying drawings.
First, as a typical strucutre of the batter~
accord~n~ to the ~xe$ent invention wherein the ring~shaped pro-jection is provided on two portions of three members described above, one embodi~ent o the batter~, which includes the ring-shaped projections provided on hoth the flange of the ter~inal pin o opposIte polarity and the apertureedge of the metal sealing coVer so as to be opposite to each other, has been shown in Fig~ 3, and the ter~inal ~in of opposite polarity used for the battery has been shown in Fig. 4. In these draw-ings, (l) is an outer jacket can serving as one polarity term-inal, which includes the electrode assembly (2) and is covered with a metal sealing cover (3). In this case, an aperture edge of the can (l) and the circumferential edge of the sealing cover (3) are welded to each other by laser welding. The sealing cover ~3) has an aperture (4) at the center thereof, and the upward ring-shaped projection (5) is provided on the aperture edge. An opposite polarity terminal pin (8) is inserted into the aperture (4) through upper and lower insulating packings (6) and (7). The terminal pin has a flange (9) and is inserted into the aperture (4) in such a manner that the flange is ex-ternally located. A metal washer (11) is disposed on an extended portion (10) of the terminal pin (8) extending down-wardly from the aperture. When the top of the extended portion(lp~ is crimped by collapsing, insulating packings (6) and (7) disposed at upper and lower portions of the aperture circumference (12), and the aperture circumference (12) are held by the flange (9) and the metal washer (11).
In the embodiment, since a ring-shaped projection (13) i~ also povided on t~e flan~e (9) as shown in Fig. 4, it cuts into the insulating packing~ ~6l during crimping. There-fore, a part (14l of the ~nsulating packing (6~ opposite the ring-shaped pro~ection ~13l i~ ~t~ongl~ pres$ed to the sealing coVe~ (3~ as co~pared w~th th~e ~e~a~ning portion, thereby pre-~enting li~uid le~kage f~o~ -the electrode ~ssembl~ (2) past the portion (14). Since the ~ing-shaped pro~ections ~13 and t5) "
cut i~to the ~nsl~tin~ packin~ ~6~ uid le~ka~e iS p~eyented at two portions provided b~ the r~ng-shaped projection ~5~ and the portion (14), thereb~ greatly improving the sealiny per-formance. Fuxther, a terminal pin which is provided with the flanye on the lower po~tion as shown in Figs. 1 and 2 may be used instead of the terminal pin (8).
Further, the ring-shaped projections (5) and (133 are provided on both the metal sealing cover (3) and the flange of the terminal pin (8~ in the embodiment described above, but they may ~e oppositely provided on both the metal sealing cover (~) and the metal washer (11), or on both the flange of the terminal pin (8) and the metal washer (11).
The insulating packings (6) and (7) may be made of polyethylene, polypropylene, polyimide, silicone resin, fluorine resin, and the like which have liquid leakage resistance to the electrolyte and elastic properties. The physical properties such as the elast;~city, the hardness, and the like may be suit-ably selected according to the batteries the present invention.
These ~nsulating packings may be similarly employed in the follow-ing e~odiments~
As batteries of the present invention wherein the ring-shaped projection is provided on one member of these three members described above, embodiments of batteries, which are provided with the ring-shaped projection formed at or adjacent the aperture edge of the sealing cover, will be described with reference to the accompanying drawings. Figs. 5 to 7 are cross-sectional views of the sealed portions of respective em~x~ments In ~ig. 5, a down~a~rd ~ing-shaped projection (30al ~s pxoY~ded ~t an ~perture ed~e (23b) of a sealing coveX (23) ~y mea~s of ~swa~n~ oX press~n~ techni~ues. ~hen an cutwardl~
extendrng portion (28l of opposite polaxit~ terminal pin (27~
is enlarged and crimped, the ring-shaped projection (30a) cuts '7~
into a lowex insluatin~ packin~ (25~, thereby preyenting li~uid leakage of electrol~te ~rom the electxode assembl~ ~21~ through the aperture (24~.
The b~tter~ shown in Fig. 6 has a ring-shaped pro-3ection (40a) extending upwardly on the aperture edge (33b) as a structu~e oppo~ite to that o~ F~g. 5. The ring-shaped projection (40a) cuts into the upper insluating packing (36) dur;ng cr~mptng o~ the terminal pin (37), thereby preventing leakage of the electrolyte.
Tn the battery shown in Fig. 7 a ring-shaped pro-jection (~50c) is provided on a portion (43a) positioned ad jacent the aperture (44) of a sealing cover (43). The ring-shaped projection (50c) cuts into the insulating packing (45) during crimp;ng of the terminal pin (47~, thereby preventing leakage of the electrolyte.
The batteries according to the embodiments have ad-vantages that the mechanical strength of the respective~ sealing cover (23) (33)ox (43~ is increased by providing the ring-shaped pro-jection ~30a)(40a) ox (50c), respectively, and the projection is provided on the sealing covers by simple machining.
Further, a plurality of ring-shaped projections may be formed in the sealing cover. The present invention may contain such a structure that two ring-shaped projections, for example, are provided on one sealing cover as shown in Figs.
6 and 7 Next, a battery ~howing $till another embodiment of the present inventi~n ~hexein the ring-shaped proiection is pro-vided on only the flan~e of the te~minal pin will be described.
F~ 8 ~S a cxo$s-sectiQnal Yiew o~ a sealed poxt~on according to the embodiment.
Tn Fig. 8, since a ring~shaped projection (63) is pro-vided on a flan~e (59) of opposite polarity terminal pin (58), {)'75~
~it cutS ~nto the insul~tin~ pack~n~ (56) during crimpin~.
Therefore a part (G4) of the ;~nsul~ting packing (~6)~ opposite to the ring-shaped projection (63) is strongly pressed to the sealin~ cove~ (53) as compared ~ith the other portions, thereby preventing leakage of the electrolyte from the electrode assembly (52) at the portion (64). ~n addition, the ring-shaped pro-jection may be provided on a side contacting to the insulating packing (57~ of the metal washer (61) instead of the projec-tion described aBo~e.
Fig. 9 is a cross-sectional view of a battery according to still further embodiment of the present invention wherein a ring-shaped projection (831 has been provided only on the metal washer (81).
Further, a plurality of ring-snaped projections may be formed on the flange of the opposite polarity terminal pin and the metal washer, respectively.
~ ccording to the present invention as described above in detail, the ring-shaped projeection is provided on at least the metal sea]ing cover, the flange of the opposite polarity terminal pin, and~or the metal washer, and the sealing coverand the insulating packings are strongly pressed to one another by cutting the projection into the insulating packings, thereby preventing the leakage of the electrolyte~ Consequent-ly, batteries with very high sealing performacne are provided.
~ 7 `:
The inVentiQn ~el~tes to a battery havin~ a sealed structure and a, hi~h sealing pe~formance.
The present invention will be illustrated by way of the accompanyIng d~awings, in which:-Fig. 1 is a cross-sectioanl view of a conventional sealed battery;
Fig. 2 is an enlarged cross-sectional view of a sealed portion of the conventional sealed battery of Fig. l;
~ tg. 3 is a cross-sectional view of a sealed battery according to one embodiment of the present invention wherein a ring-shaped projection is provided on both a flange of the opposite polarity terminal pin and an aperture edge of a metal sealing cover;
Fig. 4 is a partially broken perspective view of the terminal pin of opposite.-polarity of the battery of Fig. 3 as seen from the lower part;
Fiys. 5 to 7 are cross-sectional views of sealed por-tions of batteries according to various embodiments wherein a ring-shaped projection in provided on an aperture edge of the metal sealing cover or on the metal sealing cover adjacent the aperture;
~ ig. 8 is:a cross-sectional vlew of a sealed portion of a battery accordingto ~further embodiment wherein a ring-shaped projection is provided on the flange of the termanal pin of opp~slte polarity; and Fig. 9 is a cross-sectional view of a sealed portion of a ~atter~ according to.an even further embodiment wherein a ring-shaped proiectio~ is provided only on th.e ~etal washer.
A conventiona,l sea,Led b.atter comprises a,n outer jacket can (b~ serving as a~ terminal with one polarity and includin~ an elect~ode as~e~bly (a,), ,a,nd a metal $ealing coVer (c~, as sh.own in Fi~g. 1~ Th~e sealed ba,tter~ is. provided with a sealed structure b~ inserting a terminal pin (g) with the ~V753 opposite polaxit~ into an ~e~ture (d~ of the cover (c~ th~ough insulating pack~ngs (e~ and (~), and enlarging and crimpin~ a top of an extexnal p~ojection (.hl of the terminal pin (g) ~etween a metal washer (i) disposed on the external projection (h) and an internal flange (j2 of the terminal pin (g), thereby attaching the sealin~ co~er (c~ and insulating packings (e) and (f) therebetween.
I~n such a sealed structure, however, a portion (c') adjacent the aperture (d) of the sealing cover (c) is flat making a planar contact with the respective insulating packings (e) and ~f). Therefore, even when the crimping force for the terminal- pin (g) is increased, it may be dispersed at the fla~
surface of the portion ~c~, whereby the electrolyte in the el-ectrode assembly may leak out as shown by the arrows in Fig. 2.
The present invention provides a sealed battery having a sealed structure with high sealing performance preventing undesired leakage of the electrolyte.
The present inVentlon thus provides a battery which comprises an outer jacket can serving as a terminal with one polarity and including the electrode assembly, and a metal sealing cover on the can, and which is provided with means for attachlng the sealing cover and insulating packings between a metal washer disposed on an e~tended portion of a terminal pin and a flange of the terminal pin by inserting the terminal pin of opposite polarity into an aperture of the sealing cover throu~ the insulating packings and at least one ring-shaped projection b~ting xnto the insula~ting packings diSposed on at le~St one of the ~ealing coveX~s., the flange of the terminal ~in, and the metal washex.
3Q The batter~ acco~ding to th.e pre~ent invention is characterized in that a ring-shaped p~ojection having a simple structure is provided at at least one portion of three members 75~
descxihed above to bite into the insul~ting packings. ~s a result, once the crimping force is not dispersed over the en-tire contact sux~ace between the sealing cover and the insula-ting packings and is centered at the ring-shaped projection, the sealing performance is gxeatl~ improved preventing leakaye of the electrolyte.
Such sealed batteries have been inparticular used by incorporating them into electrical appliances. According to the present invention, however, by the prevention of the leak-a~e of electrolyte, the life of the batteries will be length-ened, and undesired contact faults between the batteries and contacts of electrical appliances,the corrosion of the elect-rical appliances and the lowering of function of electrical appliances will be also prevented.
- In the battery according to the present invention at least one ring-shaped projection is provided on the metal sealing cover, the flange of the terminal pin of opposite polarity and the metal washer.
Th~s ring-shaped projection is a continuous ring-shaped projection which is provided on the surface for pressing an insulating packing if a metal sealing cover is given as an example, and its configuration is either a pointed end structure or a slightly rounded wedge-shaped structure in cross section.
Further, the height of the projection is suitably selected in such a manner that it is less than the thickness of the insul-ating packing. ~n addition, the projection can be provided by simple machining.
Battex~e~ accoxding to the present invention ~ill no~
be described w~th re~erence to the accompanying drawings.
First, as a typical strucutre of the batter~
accord~n~ to the ~xe$ent invention wherein the ring~shaped pro-jection is provided on two portions of three members described above, one embodi~ent o the batter~, which includes the ring-shaped projections provided on hoth the flange of the ter~inal pin o opposIte polarity and the apertureedge of the metal sealing coVer so as to be opposite to each other, has been shown in Fig~ 3, and the ter~inal ~in of opposite polarity used for the battery has been shown in Fig. 4. In these draw-ings, (l) is an outer jacket can serving as one polarity term-inal, which includes the electrode assembly (2) and is covered with a metal sealing cover (3). In this case, an aperture edge of the can (l) and the circumferential edge of the sealing cover (3) are welded to each other by laser welding. The sealing cover ~3) has an aperture (4) at the center thereof, and the upward ring-shaped projection (5) is provided on the aperture edge. An opposite polarity terminal pin (8) is inserted into the aperture (4) through upper and lower insulating packings (6) and (7). The terminal pin has a flange (9) and is inserted into the aperture (4) in such a manner that the flange is ex-ternally located. A metal washer (11) is disposed on an extended portion (10) of the terminal pin (8) extending down-wardly from the aperture. When the top of the extended portion(lp~ is crimped by collapsing, insulating packings (6) and (7) disposed at upper and lower portions of the aperture circumference (12), and the aperture circumference (12) are held by the flange (9) and the metal washer (11).
In the embodiment, since a ring-shaped projection (13) i~ also povided on t~e flan~e (9) as shown in Fig. 4, it cuts into the insulating packing~ ~6l during crimping. There-fore, a part (14l of the ~nsulating packing (6~ opposite the ring-shaped pro~ection ~13l i~ ~t~ongl~ pres$ed to the sealing coVe~ (3~ as co~pared w~th th~e ~e~a~ning portion, thereby pre-~enting li~uid le~kage f~o~ -the electrode ~ssembl~ (2) past the portion (14). Since the ~ing-shaped pro~ections ~13 and t5) "
cut i~to the ~nsl~tin~ packin~ ~6~ uid le~ka~e iS p~eyented at two portions provided b~ the r~ng-shaped projection ~5~ and the portion (14), thereb~ greatly improving the sealiny per-formance. Fuxther, a terminal pin which is provided with the flanye on the lower po~tion as shown in Figs. 1 and 2 may be used instead of the terminal pin (8).
Further, the ring-shaped projections (5) and (133 are provided on both the metal sealing cover (3) and the flange of the terminal pin (8~ in the embodiment described above, but they may ~e oppositely provided on both the metal sealing cover (~) and the metal washer (11), or on both the flange of the terminal pin (8) and the metal washer (11).
The insulating packings (6) and (7) may be made of polyethylene, polypropylene, polyimide, silicone resin, fluorine resin, and the like which have liquid leakage resistance to the electrolyte and elastic properties. The physical properties such as the elast;~city, the hardness, and the like may be suit-ably selected according to the batteries the present invention.
These ~nsulating packings may be similarly employed in the follow-ing e~odiments~
As batteries of the present invention wherein the ring-shaped projection is provided on one member of these three members described above, embodiments of batteries, which are provided with the ring-shaped projection formed at or adjacent the aperture edge of the sealing cover, will be described with reference to the accompanying drawings. Figs. 5 to 7 are cross-sectional views of the sealed portions of respective em~x~ments In ~ig. 5, a down~a~rd ~ing-shaped projection (30al ~s pxoY~ded ~t an ~perture ed~e (23b) of a sealing coveX (23) ~y mea~s of ~swa~n~ oX press~n~ techni~ues. ~hen an cutwardl~
extendrng portion (28l of opposite polaxit~ terminal pin (27~
is enlarged and crimped, the ring-shaped projection (30a) cuts '7~
into a lowex insluatin~ packin~ (25~, thereby preyenting li~uid leakage of electrol~te ~rom the electxode assembl~ ~21~ through the aperture (24~.
The b~tter~ shown in Fig. 6 has a ring-shaped pro-3ection (40a) extending upwardly on the aperture edge (33b) as a structu~e oppo~ite to that o~ F~g. 5. The ring-shaped projection (40a) cuts into the upper insluating packing (36) dur;ng cr~mptng o~ the terminal pin (37), thereby preventing leakage of the electrolyte.
Tn the battery shown in Fig. 7 a ring-shaped pro-jection (~50c) is provided on a portion (43a) positioned ad jacent the aperture (44) of a sealing cover (43). The ring-shaped projection (50c) cuts into the insulating packing (45) during crimp;ng of the terminal pin (47~, thereby preventing leakage of the electrolyte.
The batteries according to the embodiments have ad-vantages that the mechanical strength of the respective~ sealing cover (23) (33)ox (43~ is increased by providing the ring-shaped pro-jection ~30a)(40a) ox (50c), respectively, and the projection is provided on the sealing covers by simple machining.
Further, a plurality of ring-shaped projections may be formed in the sealing cover. The present invention may contain such a structure that two ring-shaped projections, for example, are provided on one sealing cover as shown in Figs.
6 and 7 Next, a battery ~howing $till another embodiment of the present inventi~n ~hexein the ring-shaped proiection is pro-vided on only the flan~e of the te~minal pin will be described.
F~ 8 ~S a cxo$s-sectiQnal Yiew o~ a sealed poxt~on according to the embodiment.
Tn Fig. 8, since a ring~shaped projection (63) is pro-vided on a flan~e (59) of opposite polarity terminal pin (58), {)'75~
~it cutS ~nto the insul~tin~ pack~n~ (56) during crimpin~.
Therefore a part (G4) of the ;~nsul~ting packing (~6)~ opposite to the ring-shaped projection (63) is strongly pressed to the sealin~ cove~ (53) as compared ~ith the other portions, thereby preventing leakage of the electrolyte from the electrode assembly (52) at the portion (64). ~n addition, the ring-shaped pro-jection may be provided on a side contacting to the insulating packing (57~ of the metal washer (61) instead of the projec-tion described aBo~e.
Fig. 9 is a cross-sectional view of a battery according to still further embodiment of the present invention wherein a ring-shaped projection (831 has been provided only on the metal washer (81).
Further, a plurality of ring-snaped projections may be formed on the flange of the opposite polarity terminal pin and the metal washer, respectively.
~ ccording to the present invention as described above in detail, the ring-shaped projeection is provided on at least the metal sea]ing cover, the flange of the opposite polarity terminal pin, and~or the metal washer, and the sealing coverand the insulating packings are strongly pressed to one another by cutting the projection into the insulating packings, thereby preventing the leakage of the electrolyte~ Consequent-ly, batteries with very high sealing performacne are provided.
~ 7 `:
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a battery comprising an outer jacket can including an electrode assembly and serving as a terminal with one polarity, a metal sealing cover covering said outer jacket can, a terminal pin of opposite polarity extending through insulating packings into an aperture in said sealing cover, said sealing cover and said packings being held between a metal washer on an extended portion of said terminal pin and a flange of said terminal pin, and at least one ring-shaped projection cutting into said insulating packings, said projection being povided on at least one of said sealing cover, said flange of said terminal pin, and said metal washer.
2. A battery as defined in claim 1, wherein ring-shaped projections are provided on both said flange of said terminal pin of opposite polarity or said metal washer and the aperture edge of said metal sealing cover or a portion of said sealing cover disposed adjacent said aperture edge so as to be opposite to each other.
3. A battery as defined in claim 1, wherein said ring shaped projection is provided on said aperture edge of said metal sealing cover or on a portion of said sealing cover dis-posed adjacent said aperture edge.
4. A battery as defined in claim 1, wherein said ring-shaped projection is provided on said flange of said terminal pin of opposite polarity or on said metal washer.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15682981U JPS5860862U (en) | 1981-10-20 | 1981-10-20 | battery |
| JP156830/1981 | 1981-10-20 | ||
| JP15683081U JPS5860863U (en) | 1981-10-20 | 1981-10-20 | battery |
| JP156829/1981 | 1981-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1180753A true CA1180753A (en) | 1985-01-08 |
Family
ID=26484477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000413761A Expired CA1180753A (en) | 1981-10-20 | 1982-10-19 | Battery |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1180753A (en) |
| CH (1) | CH658547A5 (en) |
| DE (1) | DE3238701A1 (en) |
| FR (1) | FR2514951B1 (en) |
| GB (1) | GB2111295B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4606983A (en) * | 1985-02-25 | 1986-08-19 | Duracell Inc. | Anchored terminal conductor |
| JP2003151528A (en) * | 2001-11-14 | 2003-05-23 | Nec Tokin Tochigi Ltd | Sealed battery |
| JP2003173767A (en) * | 2001-12-04 | 2003-06-20 | Nec Tokin Tochigi Ltd | Sealed battery |
| KR100467703B1 (en) * | 2002-10-21 | 2005-01-24 | 삼성에스디아이 주식회사 | Cap assembly and secondary battery applying the same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1486250A (en) * | 1921-09-26 | 1924-03-11 | Melvin C King | Electric connection |
| FR885533A (en) * | 1942-01-29 | 1943-09-17 | Friemann & Wolf Gmbh | Method and device for the manufacture of terminals for electric accumulators |
| GB564077A (en) * | 1943-04-28 | 1944-09-12 | Britannia Batteries Ltd | Improvements in alkaline electric batteries or accumulators |
| US3427205A (en) * | 1966-09-01 | 1969-02-11 | Nasa | Spacecraft battery seals |
| CH480738A (en) * | 1967-10-04 | 1969-10-31 | Leclanche Sa | Hermetically sealed housing for a galvanic element or for an accumulator |
| US3510353A (en) * | 1968-03-29 | 1970-05-05 | Bell Telephone Labor Inc | Sealed battery |
| JPS5399426A (en) * | 1977-02-10 | 1978-08-30 | Fuji Electrochemical Co Ltd | Enclosed alkaline battery |
| DE2849326A1 (en) * | 1978-11-14 | 1980-05-29 | Deutsche Automobilgesellsch | DISASSEMBLABLE, GAS-TIGHT AND PRESSURE-RESISTANT ELECTRICITY |
| US4314009A (en) * | 1979-12-07 | 1982-02-02 | Sanyo Electric Co., Ltd. | Battery |
| DE3003763A1 (en) * | 1980-02-01 | 1981-08-06 | Rudolf 7896 Wutöschingen Klaschka | METAL LID WITH ELECTRICALLY INSULATED ELECTRICAL BUSHING |
-
1982
- 1982-10-18 CH CH6060/82A patent/CH658547A5/en not_active IP Right Cessation
- 1982-10-19 CA CA000413761A patent/CA1180753A/en not_active Expired
- 1982-10-19 DE DE19823238701 patent/DE3238701A1/en active Granted
- 1982-10-19 GB GB08229838A patent/GB2111295B/en not_active Expired
- 1982-10-20 FR FR8217558A patent/FR2514951B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2111295A (en) | 1983-06-29 |
| GB2111295B (en) | 1985-07-10 |
| DE3238701A1 (en) | 1983-04-28 |
| FR2514951A1 (en) | 1983-04-22 |
| FR2514951B1 (en) | 1986-03-07 |
| CH658547A5 (en) | 1986-11-14 |
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