WO2022070829A1 - バイポーラ型蓄電池 - Google Patents
バイポーラ型蓄電池 Download PDFInfo
- Publication number
- WO2022070829A1 WO2022070829A1 PCT/JP2021/033197 JP2021033197W WO2022070829A1 WO 2022070829 A1 WO2022070829 A1 WO 2022070829A1 JP 2021033197 W JP2021033197 W JP 2021033197W WO 2022070829 A1 WO2022070829 A1 WO 2022070829A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bipolar
- positive electrode
- covering member
- storage battery
- adhesive
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 61
- 239000000853 adhesive Substances 0.000 claims abstract description 56
- 230000001070 adhesive effect Effects 0.000 claims abstract description 56
- -1 amine compound Chemical class 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 229920000768 polyamine Polymers 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 5
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical group C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 3
- 125000002723 alicyclic group Chemical group 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 60
- 239000008151 electrolyte solution Substances 0.000 abstract description 35
- 230000007797 corrosion Effects 0.000 abstract description 29
- 238000005260 corrosion Methods 0.000 abstract description 29
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000035515 penetration Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 52
- 239000002253 acid Substances 0.000 description 34
- 239000011149 active material Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 7
- 238000001764 infiltration Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 3
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 2
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/18—Lead-acid accumulators with bipolar electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/68—Selection of materials for use in lead-acid accumulators
- H01M4/685—Lead alloys
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
- H01M50/16—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/029—Bipolar electrodes
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- An embodiment of the present invention relates to a bipolar storage battery.
- the bipolar lead-acid battery includes a bipolar electrode having a positive electrode and a negative electrode, and a substrate (bipolar plate) having a positive electrode provided on one surface and a negative electrode provided on the other surface.
- a lead layer 220 for a positive electrode is arranged on one surface of a resin substrate 210 via an adhesive layer 240, and lead for the positive electrode is arranged. It is configured by arranging a positive electrode active material layer (not shown) on the layer 220.
- the lead layer 220 for the positive electrode is corroded by the sulfuric acid contained in the electrolytic solution, and a film 260 of a corrosion product (lead oxide) is formed on the surface of the lead layer 220 for the positive electrode. In some cases (see (b) in FIG. 11). Then, the growth of the film 260 of the corrosion product may cause elongation (growth) in the lead layer 220 for the positive electrode.
- the lead layer 220 for the positive electrode and the adhesive layer 240 are peeled off, the electrolytic solution infiltrates the interface between the lead layer 220 for the positive electrode and the adhesive layer 240, and the corrosion of the lead layer 220 for the positive electrode further progresses due to sulfuric acid. (See (c) in FIG. 11).
- the corrosion reaches, for example, the back surface of the lead layer 220 for the positive electrode (the surface facing the substrate 210), a short circuit may occur and the performance of the battery may deteriorate.
- the present invention provides a bipolar storage battery in which even if growth occurs in the positive electrode due to corrosion by sulfuric acid contained in the electrolytic solution, the electrolytic solution does not easily penetrate into the interface between the positive electrode and the adhesive, and the battery performance does not easily deteriorate. With the goal.
- the bipolar storage battery is a bipolar storage battery including a bipolar electrode having a positive electrode and a negative electrode, and a bipolar plate having a positive electrode provided on one surface and a negative electrode provided on the other surface.
- the bipolar electrode is characterized by comprising a covering member that is in close contact with the peripheral edge portion of the surface facing the surface bonded to the bipolar plate of the positive electrode and covers the peripheral edge portion.
- a bipolar storage battery comprising a bipolar electrode having a positive electrode and a negative electrode, and a bipolar plate having a positive electrode provided on one surface and a negative electrode provided on the other surface, wherein the bipolar electrode is a bipolar electrode. It is characterized by comprising a covering member which is in close contact with the peripheral edge portion of the surface facing the surface to be adhered to the bipolar plate of the positive electrode and covers the peripheral edge portion.
- bipolar electrode which shows the structure of the main part of the modification of the bipolar type lead storage battery which concerns on 1st Embodiment of this invention. It is an enlarged sectional view of the bipolar electrode which shows the structure of the main part of the 2nd Embodiment of the bipolar type lead storage battery which concerns on this invention. It is an enlarged sectional view of the bipolar electrode which shows the structure of the main part of the 3rd Embodiment of the bipolar type lead storage battery which concerns on this invention. It is an enlarged sectional view of the bipolar electrode which shows the structure of the main part of the 4th Embodiment of the bipolar type lead storage battery which concerns on this invention.
- bipolar electrode which shows the structure of the main part of the 5th Embodiment of the bipolar type lead storage battery which concerns on this invention. It is an enlarged sectional view of the bipolar electrode which shows the structure of the main part of the 6th Embodiment of the bipolar type lead storage battery which concerns on this invention.
- a diagram showing how the electrolytic solution infiltrates the interface between the lead layer for the positive electrode and the adhesive as a result of growth in the lead layer for the positive electrode due to corrosion by sulfuric acid contained in the electrolytic solution. be.
- FIG. 1 is a cross-sectional view illustrating the structure of the bipolar lead-acid battery 1 according to the embodiment of the present invention.
- the bipolar lead-acid battery 1 shown in FIG. 1 has a first plate unit in which a negative electrode 110 is fixed to a flat plate-shaped first plate (end plate) 11 and an electrolytic layer 105 in a frame plate-shaped second plate (spacer) 12.
- a second plate unit fixed inside and a bipolar electrode 130 having a positive electrode 120 provided on one surface of the substrate (bipolar plate) 111 and a negative electrode 110 provided on the other surface are framed by a third plate (rim) in the shape of a frame plate.
- 13 has a third plate unit fixed inside, and a fourth plate unit in which the positive electrode 120 is fixed to a flat plate-shaped fourth plate (end plate) 14.
- a bipolar lead-acid battery 1 having a substantially rectangular parallelepiped shape is configured.
- the number of each of the second plate unit and the third plate unit to be stacked is set so that the storage capacity of the bipolar lead-acid battery 1 becomes a desired value.
- the negative electrode terminal 107 is fixed to the first plate 11, and the negative electrode 110 fixed to the first plate 11 and the negative electrode terminal 107 are electrically connected.
- a positive electrode terminal 108 is fixed to the fourth plate 14, and the positive electrode 120 fixed to the fourth plate 14 and the positive electrode terminal 108 are electrically connected to each other.
- the first plate 11 to the fourth plate 14 are formed of, for example, a well-known molding resin.
- the first plate 11 to the fourth plate 14 are fixed to each other so that the inside is sealed by an appropriate method so that the electrolytic solution does not flow out.
- the electrolytic layer 105 is composed of, for example, a glass fiber mat impregnated with an electrolytic solution containing sulfuric acid.
- the bipolar plate 111 is made of, for example, a thermoplastic resin.
- the thermoplastic resin forming the bipolar plate 111 include acrylonitrile-butadiene-styrene copolymer (ABS resin) and polypropylene. These thermoplastic resins have excellent moldability and sulfuric acid resistance. Therefore, even if the electrolytic solution comes into contact with the bipolar plate 111, the bipolar plate 111 is unlikely to be decomposed, deteriorated, or corroded.
- the positive electrode 120 is a positive electrode lead layer 101 which is made of lead or a lead alloy and is a positive electrode current collector arranged on one surface of the bipolar plate 111, and a positive electrode arranged on the positive electrode lead layer 101.
- the active material layer 103 is provided.
- the positive electrode lead layer 101 is adhered to one surface of the bipolar plate 111 by an adhesive 140 provided between one surface of the bipolar plate 111 and the lead layer 101 for the positive electrode. Therefore, the adhesive 140, the lead layer 101 for the positive electrode, and the active material layer 103 for the positive electrode are formed on one surface of the bipolar plate 111 (the surface facing upward on the paper surface in the drawings such as FIG. 2 described later). However, they are stacked in this order of description.
- the negative electrode 110 is a lead layer 102 for a negative electrode, which is a current collector for a negative electrode and is made of lead or a lead alloy and is arranged on the other surface of the bipolar plate 111, and a negative electrode arranged on the lead layer 102 for a negative electrode.
- the active material layer 104 is provided.
- the negative electrode lead layer 102 is adhered to the other surface of the bipolar plate 111 by an adhesive 140 provided between the other surface of the bipolar plate 111 and the negative electrode lead layer 102.
- the positive electrode 120 and the negative electrode 110 are electrically connected by an appropriate method.
- the bipolar electrode is an electrode having both positive and negative functions with one electrode.
- a plurality of cell members having an electrolytic layer 105 interposed between the positive electrode 120 and the negative electrode 110 are alternately laminated and assembled to connect the cell members to each other. It has a battery configuration connected in series.
- the lead layer 101 for the positive electrode grows due to corrosion by the sulfuric acid contained in the electrolytic solution
- the lead layer 101 for the positive electrode and the adhesive 140 It has a structure that suppresses the infiltration of the electrolytic solution into the interface with.
- the structure in which the infiltration of the electrolytic solution is suppressed will be described in detail with reference to FIGS. 2 and 3.
- FIG. 2 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the bipolar lead-acid battery 1 according to the first embodiment.
- FIG. 3 shows that in the bipolar lead-acid battery 1 according to the first embodiment, even if the positive electrode 120 grows due to corrosion by sulfuric acid contained in the electrolytic solution, the interface between the positive electrode 120 and the adhesive 140 is shown. It is a figure explaining how the infiltration of an electrolytic solution is suppressed.
- the lead layer 101 for the positive electrode and the active material layer 103 for the positive electrode are collectively shown as the positive electrode 120.
- the covering member 150 is provided so as to cover the peripheral edge portion of the positive electrode lead layer 101 exposed at the peripheral edge portion of the positive electrode active material layer 103 when the covering members 150 are laminated. As described above, the covering member 150 may be provided so as to cover at least the peripheral portion of the lead layer 101 for the positive electrode.
- the covering member 150 may be provided so as to cover the peripheral edge portion of the positive electrode 120, and for example, cover the peripheral edge portion of the positive electrode active material layer 103. It can also be provided as such. Further, the negative electrode 110 formed on the other surface of the bipolar plate 111 is not shown.
- a bipolar plate 111 In the bipolar electrode 130 shown in FIG. 2, a bipolar plate 111, an adhesive 140, a positive electrode 120, and a covering member 150 are laminated in this order.
- the bipolar plate 111 extends horizontally in the drawing, and is not shown in the right portion thereof.
- the positive electrode 120 is adhered to a portion extending in the horizontal direction constituting one surface of the bipolar plate 111 via an adhesive 140. Further, the adhesive 140 surrounds not only between one surface of the bipolar plate 111 and the surface of the positive electrode 120 facing the surface but also the peripheral edge portion 120b of the peripheral edge portion 120a of the positive electrode 120, and is vertical to the bipolar plate 111. It is also provided in the portion extending in the direction.
- the peripheral edge of the surface facing the surface of the positive electrode 120 to be adhered to the bipolar plate 111 (hereinafter, this surface is appropriately referred to as “opposing surface 120c”).
- a covering member 150 that is in close contact with the portion 120a and covers the peripheral edge portion 120a is provided.
- the surface of the covering member 150 facing the peripheral edge portion 120a, one end portion 150a side, is in contact with the adhesive 140 extending vertically from the bipolar plate 111. That is, the covering member 150 is provided so as to cover the peripheral edge portion 120a of the positive electrode 120.
- the covering member 150 is arranged so as to press the positive electrode 120. Since the covering member 150 is in close contact with the peripheral edge portion 120a of the positive electrode 120, as shown in FIG. 3, even if a coating film 160 of a corrosion product (lead oxide) is formed on the surface of the positive electrode 120, a coating film of the corrosion product is formed. The growth of 160 is suppressed by the covering member 150, and the growth of the corrosion product coating 160 to the peripheral edge portion 120a is suppressed.
- a corrosion product lead oxide
- the positive electrode 120 and the adhesive 140 are unlikely to be peeled off, so that the electrolytic solution penetrates into the interface between the positive electrode 120 and the adhesive 140. Is suppressed. Therefore, it is unlikely that corrosion due to sulfuric acid will reach the back surface of the positive electrode 120 (the surface of the positive electrode 120 and facing the bipolar plate 111), causing a short circuit and the like, resulting in deterioration of battery performance.
- peripheral edge portion 120a of the positive electrode 120 is an outer portion of the facing surface 120c. Therefore, when the positive electrode 120 is grasped in a plane, it forms a frame shape surrounding the four sides of the positive electrode 120.
- the above effect is exhibited if the covering member 150 covers even a part of the frame-shaped peripheral edge portion 120a. However, it is more preferable that the covering member 150 covers the entire frame-shaped peripheral edge portion 120a, the above-mentioned effect is further exhibited, and the performance of the battery is hardly deteriorated.
- FIG. 4 is a plan view of the bipolar electrode 130 for explaining the structure of the main part of the bipolar lead-acid battery 1 according to the first embodiment. As shown in FIG. 4, it is more preferable that the covering member 150 has a frame shape that covers the peripheral edge portion 120a of the positive electrode 120.
- the covering member 150 may have sulfuric acid resistance that is not easily corroded by sulfuric acid, and examples of the material of the covering member 150 include sulfuric acid-resistant resins, metals (for example, stainless steel), and ceramics. Be done.
- a resin for example, acrylonitrile-butadiene-styrene copolymer (ABS resin), polypropylene or the like can be used.
- ABS resin acrylonitrile-butadiene-styrene copolymer
- polypropylene polypropylene or the like.
- thermoplastic resins have excellent moldability and sulfuric acid resistance. Therefore, even if the electrolytic solution comes into contact with the covering member 150, the covering member 150 is unlikely to be decomposed, deteriorated, or corroded.
- the region of the positive electrode 120 to which the covering member 150 is in close contact includes the peripheral edge portion 120a thereof, and is a region of a preset distance from the peripheral edge portion 120b.
- the region where the covering member 150 provided on the facing surface 120c is in close contact with the positive electrode 120 is at least the covering member 150 from the peripheral end portion 120b of the positive electrode 120 to the facing surface 120c. It is a region represented by the distance L1 to the other end portion 150b of the above.
- the distance L1 is 4.6 mm or more. Further, more preferably, the distance L1 is preferably less than 10 mm.
- the distance L1 is required to be as short as possible, but it is made too short. If this happens, the electrolyte will be allowed to infiltrate and the creepage distance will be extended. Therefore, the distance L1 is set to a range of 4.6 mm or more and less than 10 mm.
- the adhesive 140 is provided in the region indicated by the distance L2 between the positive electrode 120 and the portion extending in the vertical direction of the bipolar plate 111, and the adhesive 140 also has the adhesive 140.
- the covering member 150 is in close contact.
- the distance required to prevent the infiltration of sulfuric acid is the distance L1 in relation to the creepage distance, and the distance L2 can be arbitrarily set.
- the distance L3 representing the thickness of the covering member 150 is formed so as to be 0.5 mm or more and 8.0 mm or less.
- the thickness of the covering member 150 is set in such a range.
- the electrolytic solution penetrates into the interface between the facing surface 120c of the positive electrode 120 and the adhesive 140. This is because there is a possibility that the covering member 150 may float in such a case.
- it is thicker than 8.0 mm, it may affect the structure around the bipolar electrode 130.
- the covering member 150 in the region including the peripheral edge portion 120a of the positive electrode 120 in this way, as described above, even if growth occurs, the electrolytic solution penetrates into the interface between the positive electrode 120 and the covering member 150. It is possible to prevent both from peeling off.
- the distance L1 from the peripheral end portion 120b of the positive electrode 120 to the other end portion 150b of the covering member 150 on the facing surface 120c is set to 4.6 mm or more and less than 10 mm. This makes it difficult for the electrolytic solution to penetrate into the interface between the positive electrode 120 and the covering member 150, so that it is possible to provide the bipolar lead-acid battery 1 in which the creepage distance is surely shortened and the battery performance is less likely to deteriorate.
- the covering member 150 has a predetermined thickness, even if the positive electrode 120 grows due to corrosion by sulfuric acid contained in the electrolytic solution, the covering member 150 does not turn over and covers the positive electrode 120. The infiltration of the electrolytic solution into the interface with the member 150 is further suppressed.
- the covering member 150 is directly arranged on the peripheral edge portion 120a of the positive electrode 120.
- the adhesive 140 may be provided between the peripheral edge portion 120a and the covering member 150, and the peripheral edge portion 120a and the covering member 150 may be adhered to each other by the adhesive 140.
- FIG. 5 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the modified example of the bipolar lead-acid battery 1 according to the first embodiment.
- the adhesive 140 arranged between the peripheral edge portion 120a and the covering member 150 is integrated with the adhesive 140 provided between one surface of the bipolar plate 111 and the positive electrode 120. be.
- the end portion of the adhesive 140 arranged between one surface of the bipolar plate 111 and the positive electrode 120 on the peripheral edge portion 120b side extends between the peripheral edge portion 120a of the facing surface 120c and the covering member 150.
- the peripheral edge portion 120a and the covering member 150 are adhered to each other. With such a configuration, the covering member 150 is fixed to the bipolar plate 111 via the adhesive 140.
- the adhesive provided between the peripheral edge portion 120a and the covering member 150 and the adhesive 140 provided between one surface of the bipolar plate 111 and the positive electrode 120 are continuous. It may be a separate body.
- the covering member 150 is in close contact with the peripheral edge portion 120a, and the film 160 of the corrosion product is further suppressed from growing to the peripheral edge portion 120a.
- FIG. 6 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the second embodiment of the bipolar lead-acid battery 1 according to the present invention.
- the bipolar plate 111 has a flat plate shape, but in the second embodiment, the bipolar plate 111 has a shape having a flange-shaped frame 170 at the peripheral end portion.
- a flange-shaped plate-shaped portion extends from the peripheral end portion of the bipolar plate 111 in a direction orthogonal to one surface of the bipolar plate 111, and this plate-shaped portion is the frame 170. Therefore, the frame 170 is arranged so as to surround the peripheral end portion 120b of the positive electrode 120.
- the frame 170 is made of the same material as the bipolar plate 111, such as resin.
- the covering member 150 is fixed to the frame 170. Therefore, it is easy to arrange the covering member 150 so as to press the positive electrode 120. If the covering member 150 is arranged so as to press the positive electrode 120, the coating 160 of the corrosion product is further suppressed from growing to the peripheral edge portion 120a.
- the covering member 150 and the frame 170 can also be fixed with an adhesive.
- the adhesive for fixing the covering member 150 and the frame 170 and the adhesive 140 for adhering the bipolar plate 111 and the positive electrode 120 may be integrated or separate.
- the frame 170 and the bipolar plate 111 may be an integral member as shown in FIG. 6, but may be a separate member. Further, the frame 170 in FIG. 6 shows a state in which a plate-shaped portion extends in a flange shape in a direction orthogonal to one surface of the bipolar plate 111 from the peripheral edge portion of the bipolar plate 111. A state in which the plate-shaped portion extends in a flange shape in a direction orthogonal to the other surface may be provided.
- FIG. 7 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the third embodiment of the bipolar lead-acid battery 1 according to the present invention.
- the covering member 150 is a member separate from the frame 170, but in the third embodiment, the covering member 150 is formed of a member integrated with the frame 170.
- the covering member 150 is made of the same material as the frame 170. From such a configuration, as described above, it becomes easier to arrange the covering member 150 so as to press the positive electrode 120. Therefore, if the covering member 150 is arranged so as to press the positive electrode 120, the growth of the coating film 160 of the corrosion product to the peripheral edge portion 120a is further suppressed.
- FIG. 8 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the fourth embodiment of the bipolar lead-acid battery 1 according to the present invention.
- the covering member 150 is made of a sulfuric acid-resistant resin, metal, or ceramic, but in the fourth embodiment, the covering member 150 is a cured product of an adhesive. Is formed of.
- the adhesive is applied to the peripheral edge portion 120a and cured to form the covering member 150, the same action and effect as that of the covering member 150 made of a resin, metal, or ceramic having sulfuric acid resistance can be obtained.
- the adhesive forming the covering member 150 may be integrally with the adhesive 140 for adhering the bipolar plate 111 and the positive electrode 120 as shown in FIG.
- the adhesive forming the covering member 150 and the adhesive 140 for adhering the bipolar plate 111 and the positive electrode 120 may not be continuous and may be separate bodies.
- the covering member 150 is formed of the adhesive 140, the covering member 150 is in close contact with the peripheral edge portion 120a, and the coating film 160 of the corrosion product grows up to the peripheral edge portion 120a. Is further suppressed.
- FIG. 9 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the fifth embodiment of the bipolar lead-acid battery 1 according to the present invention.
- the covering member 150 in the fifth embodiment is formed of a cured product of an adhesive as in the fourth embodiment.
- a bipolar plate 111 including a frame 170 is used.
- the adhesive is applied to the peripheral edge portion 120a and cured to form the covering member 150, the same action and effect as that of the covering member 150 made of a resin, metal, or ceramic having sulfuric acid resistance can be obtained.
- the adhesive 140 forming the covering member 150 is also fixed to the frame 170.
- the covering member 150 is in close contact with the peripheral edge portion 120a, and the film 160 of the corrosion product is further suppressed from growing to the peripheral edge portion 120a.
- FIG. 10 is an enlarged cross-sectional view of the bipolar electrode 130 showing the structure of the main part of the sixth embodiment of the bipolar lead-acid battery 1 according to the present invention.
- an adhesive 140 is provided between the covering member 150 and the facing surface 120c of the positive electrode 120, and one end portion 150a thereof is a frame 170. It is fixed to.
- the covering member 150 is provided on the facing surface 120c of the positive electrode 120 via the adhesive 140 and is fixed to the frame 170. Therefore, the covering member 150 is in close contact with the peripheral edge portion 120a, and it is easy to arrange the covering member 150 so as to press the positive electrode 120. Therefore, it is further suppressed that the coating film 160 of the corrosion product grows to the peripheral portion 120a.
- the electrolytic solution does not easily penetrate into the interface between the positive electrode and the adhesive, and the battery performance is improved. It is unlikely to drop.
- the adhesive 140 used in the bipolar lead-acid battery 1 of the first to sixth embodiments is, for example, a reaction in which a main agent containing an epoxy resin and a curing agent containing an amine compound react with each other to cure.
- a cured product of a curable adhesive can be mentioned.
- this cured product has a property of being less susceptible to sulfuric acid, and sulfuric acid is less likely to penetrate into the interface between the positive electrode 120 and the adhesive 140. Further, the cured product is less likely to be decomposed, deteriorated, corroded or the like even if it comes into contact with the electrolytic solution.
- the positive electrode 120 and the adhesive 140 are firmly adhered to each other, even if the positive electrode 120 grows due to corrosion by the sulfuric acid contained in the electrolytic solution, the electrolytic solution to the interface between the positive electrode 120 and the adhesive 140 Infiltration is suppressed. Further, the corrosion due to sulfuric acid reaches the surface of the positive electrode 120 facing the bipolar plate 111, causing a short circuit, and the problem that the performance of the battery is deteriorated is unlikely to occur.
- Examples of the epoxy resin contained in the main agent include at least one of a bisphenol A type epoxy resin and a bisphenol F type epoxy resin.
- One type of epoxy resin may be used alone, or two or more types may be used in combination.
- Examples of the amine compound contained in the curing agent include an aliphatic polyamine compound, an alicyclic polyamine compound, and an aromatic polyamine compound. One of these amine compounds may be used alone, or two or more thereof may be used in combination.
- aliphatic polyamine compound examples include aliphatic primary amines such as triethylenetetramine (C 6H 18 N 4 ) and aliphatic secondary amines such as triethylenetetramine.
- aliphatic primary amines such as triethylenetetramine (C 6H 18 N 4 )
- aliphatic secondary amines such as triethylenetetramine.
- alicyclic polyamine compound examples include alicyclic primary amines such as isophorone diamine (C 10 H 22 N 2 ).
- aromatic polyamine compound include aromatic primary amines such as diaminodiphenylmethane (C 13 H 14 N 2 ).
- the positive electrode was taken as an example for explanation, but the described structure can also be adopted for the negative electrode.
- bipolar lead-acid battery has been described as an example.
- other storage batteries that use other metals (for example, aluminum, copper, nickel), alloys, and conductive resins instead of lead for the current collector, the application is naturally excluded. It's not something to do.
- Bipolar lead-acid battery 101 Lead layer for positive electrode 102 . Lead layer for negative electrode 103 . Active material layer for positive electrode 104 ... Active material layer for negative electrode 105 ... Electrolytic layer 110 ... ⁇ ⁇ Negative electrode 111 ⁇ ⁇ ⁇ Substrate (bipolar plate) 120 ... Positive electrode 120a ... Peripheral portion 120b ... Peripheral end 120c ... Facing surface 130 ... Bipolar electrode 140 ... Adhesive 150 ... Coating member 150a ... One end 150b ... ⁇ ⁇ The other end 160 ⁇ ⁇ ⁇ Film 170 ⁇ ⁇ ⁇ Frame
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Abstract
Description
本発明の実施の形態に係るバイポーラ型鉛蓄電池1の構造を、図1を参照しながら説明する。図1は、本発明の実施の形態に係るバイポーラ型鉛蓄電池1の構造を説明する断面図である。
これまで説明してきた、第1の実施の形態のバイポーラ型鉛蓄電池1においては、図2に示すように、正極120の周縁部120aの上に被覆部材150が直接配置されている。但しこのような構成ではなく、周縁部120aと被覆部材150の間に接着剤140が設けられていて、周縁部120aと被覆部材150が接着剤140によって接着されていてもよい。
次に本発明における第2の実施の形態について説明する。なお、第2の実施の形態において、上述の第1の実施の形態において説明した構成要素と同一の構成要素には同一の符号を付し、同一の構成要素の説明は重複するので省略する。
次に本発明における第3の実施の形態について説明する。なお、第3の実施の形態において、上述の第1、第2の実施の形態において説明した構成要素と同一の構成要素には同一の符号を付し、同一の構成要素の説明は重複するので省略する。
次に本発明における第4の実施の形態について説明する。なお、第4の実施の形態において、上述の第1ないし第3の実施の形態において説明した構成要素と同一の構成要素には同一の符号を付し、同一の構成要素の説明は重複するので省略する。
次に本発明における第5の実施の形態について説明する。なお、第5の実施の形態において、上述の第1ないし第4の実施の形態において説明した構成要素と同一の構成要素には同一の符号を付し、同一の構成要素の説明は重複するので省略する。
次に本発明における第6の実施の形態について説明する。なお、第6の実施の形態において、上述の第1ないし第5の実施の形態において説明した構成要素と同一の構成要素には同一の符号を付し、同一の構成要素の説明は重複するので省略する。
第1ないし第6の実施の形態のバイポーラ型鉛蓄電池について、電位の印加、無印加を交互に繰り返し行うサイクル試験を、60℃の環境下で4週間連続して行った。その結果、第1ないし第6の実施の形態のバイポーラ型鉛蓄電池は、いずれも、硫酸による腐食が正極120の裏面に達することはなく、電池の性能は低下しなかった。
101・・・正極用鉛層
102・・・負極用鉛層
103・・・正極用活物質層
104・・・負極用活物質層
105・・・電解層
110・・・負極
111・・・基板(バイポーラプレート)
120・・・正極
120a・・・周縁部
120b・・・周縁端部
120c・・・対向面
130・・・バイポーラ電極
140・・・接着剤
150・・・被覆部材
150a・・・一端部
150b・・・他端部
160・・・皮膜
170・・・フレーム
Claims (12)
- 正極及び負極と、一方の面に前記正極が設けられて他方の面に前記負極が設けられたバイポーラプレートと、を有するバイポーラ電極を備えるバイポーラ型蓄電池であって、
前記バイポーラ電極は、前記正極の前記バイポーラプレートに接着される面に対向する面の周縁部に密着し前記周縁部を覆う被覆部材を備えることを特徴とするバイポーラ型蓄電池。 - 前記周縁部の周縁端部から前記被覆部材の端部までの距離が4.6mm以上であることを特徴とする請求項1に記載のバイポーラ型蓄電池。
- 前記周縁端部から前記被覆部材の端部までの距離が10mm未満であることを特徴とする請求項2に記載のバイポーラ型蓄電池。
- 前記被覆部材は、前記正極に設けられた接着剤の上に配置され、前記被覆部材の端部は前記接着剤が設けられている領域を覆うように配置されていることを特徴とする請求項1ないし請求項3のいずれかに記載のバイポーラ型蓄電池。
- 前記被覆部材は、0.5mm以上8.0mm以下の厚みを備えていることを特徴とする請求項4に記載のバイポーラ型蓄電池。
- 前記被覆部材が接着剤で形成されていることを特徴とする請求項1ないし3のいずれかに記載のバイポーラ型蓄電池。
- 前記接着剤は、エポキシ樹脂を含有する主剤とアミン化合物を含有する硬化剤とが反応して硬化する反応硬化型接着剤の硬化物で形成されていることを特徴とする請求項4ないし請求項6のいずれかに記載のバイポーラ型蓄電池。
- 前記アミン化合物が、脂肪族ポリアミン化合物、脂環族ポリアミン化合物、及び芳香族ポリアミン化合物の少なくとも1種である請求項7に記載のバイポーラ型蓄電池。
- 前記被覆部材は、アクリロニトリル-ブタジエン-スチレン共重合体またはポリプロピレンであることを特徴とする請求項1ないし請求項5のいずれかに記載のバイポーラ型蓄電池。
- 前記被覆部材が、前記正極の周縁端部を包囲するように配された樹脂製のフレームに固定されていることを特徴とする請求項1ないし請求項9のいずれかに記載のバイポーラ型蓄電池。
- 前記被覆部材が、前記周縁部の全体を覆う枠状をなすことを特徴とする請求項1ないし請求項10のいずれかに記載のバイポーラ型蓄電池。
- 前記正極は正極用集電体を、前記負極は負極用集電体をそれぞれ備え、前記正極用集電体および前記負極用集電体は、鉛又は鉛合金からなることを特徴とする請求項1ないし請求項11のいずれかに記載のバイポーラ型蓄電池。
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BR112023004548A BR112023004548A2 (pt) | 2020-09-30 | 2021-09-09 | Bateria de armazenamento bipolar |
CN202180055203.9A CN116114081A (zh) | 2020-09-30 | 2021-09-09 | 双极型蓄电池 |
JP2022553752A JPWO2022070829A1 (ja) | 2020-09-30 | 2021-09-09 | |
EP21875131.1A EP4224570A1 (en) | 2020-09-30 | 2021-09-09 | Bipolar storage battery |
AU2021355079A AU2021355079A1 (en) | 2020-09-30 | 2021-09-09 | Bipolar storage battery |
US18/190,671 US20230238586A1 (en) | 2020-09-30 | 2023-03-27 | Bipolar Storage Battery |
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JP2009266467A (ja) * | 2008-04-23 | 2009-11-12 | Nissan Motor Co Ltd | 双極型二次電池 |
JP2016146269A (ja) * | 2015-02-06 | 2016-08-12 | 日産自動車株式会社 | 二次電池およびその製造方法 |
JP2020119669A (ja) * | 2019-01-21 | 2020-08-06 | 株式会社豊田自動織機 | 蓄電モジュールの製造方法 |
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JP2009266467A (ja) * | 2008-04-23 | 2009-11-12 | Nissan Motor Co Ltd | 双極型二次電池 |
JP2016146269A (ja) * | 2015-02-06 | 2016-08-12 | 日産自動車株式会社 | 二次電池およびその製造方法 |
JP2020119669A (ja) * | 2019-01-21 | 2020-08-06 | 株式会社豊田自動織機 | 蓄電モジュールの製造方法 |
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