WO2022172596A1 - Batterie de stockage bipolaire - Google Patents

Batterie de stockage bipolaire Download PDF

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Publication number
WO2022172596A1
WO2022172596A1 PCT/JP2021/047001 JP2021047001W WO2022172596A1 WO 2022172596 A1 WO2022172596 A1 WO 2022172596A1 JP 2021047001 W JP2021047001 W JP 2021047001W WO 2022172596 A1 WO2022172596 A1 WO 2022172596A1
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WO
WIPO (PCT)
Prior art keywords
bipolar
pillar portion
plate
positive electrode
storage battery
Prior art date
Application number
PCT/JP2021/047001
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English (en)
Japanese (ja)
Inventor
広樹 田中
康雄 中島
健一 須山
彰 田中
芳延 平
憲治 廣田
Original Assignee
古河電気工業株式会社
古河電池株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 古河電気工業株式会社, 古河電池株式会社 filed Critical 古河電気工業株式会社
Priority to JP2022581216A priority Critical patent/JPWO2022172596A1/ja
Publication of WO2022172596A1 publication Critical patent/WO2022172596A1/fr

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    • 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
    • H01M10/16—Suspending or supporting electrodes or groups of electrodes in the case
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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

  • the embodiment of the present invention relates to a bipolar storage battery.
  • a storage battery is used to level the power load. That is, when the amount of power generation is greater than the amount of consumption, the storage battery is charged with the difference, and when the amount of power generation is less than the amount of consumption, the difference is discharged from the storage battery.
  • a lead-acid battery is often used from the viewpoint of economy, safety, and the like.
  • a substrate made of resin is attached to the inside of a frame (rim) made of resin that forms a picture frame.
  • a positive electrode lead layer and a negative electrode lead layer are provided on one surface and the other surface of the substrate.
  • the positive electrode lead layer is adjacent to the positive electrode active material layer.
  • the negative electrode lead layer is adjacent to the negative electrode active material layer.
  • a glass mat (electrolytic layer) containing an electrolytic solution is disposed inside the frame-shaped spacer made of resin.
  • a plurality of frames and spacers are alternately laminated and assembled.
  • the positive electrode lead layer and the negative electrode lead layer are directly bonded inside the multiple holes formed in the substrate. That is, it is a bipolar lead-acid battery in which a plurality of cell members and substrates having perforations (communication holes) for communicating between one surface side and the other surface side are alternately laminated.
  • the cell member includes a positive electrode having a positive electrode lead layer provided with a positive electrode active material layer, a negative electrode having a negative electrode lead layer provided with a negative electrode active material layer, and an electrolytic layer interposed between the positive electrode and the negative electrode.
  • the positive electrode lead layer of one cell member and the negative electrode lead layer of the other cell member are inserted into the perforations of the substrate and joined together, thereby connecting the cell members in series. It's becoming
  • the bipolar lead-acid battery is configured by being accommodated inside the exterior case so that the joint portion is not subjected to stress from the outside.
  • the positive electrode lead layer is corroded by the sulfuric acid contained in the electrolyte, and the surface of the positive electrode lead layer is coated with corrosion products (lead dioxide and lead sulfate). may be generated. Gas is generated at this time, and the generated gas may increase the pressure in the cells, which are the spaces in which the cell members are accommodated, and expand the cells.
  • bipolar lead-acid batteries when the frame and spacer are joined, they are laminated in the vertical direction, but when actually used, they are used at an angle of 90 degrees from this state. If the cell expands in such a state, for example, the positive electrode lead layer and the positive electrode active material layer may separate, and the positive electrode active material layer may fall off the positive electrode lead layer.
  • the falling-off positive electrode active material layer accumulates at the bottom or bottom of the bipolar lead-acid battery. In this state, a normal voltage cannot be maintained, and the performance and reliability of the battery deteriorate. may invite
  • the expansion of the cells is prevented to maintain the distance between the cells and improve the airtightness and mechanical strength of the inside of the cells.
  • a bipolar storage battery includes a cell member having a positive electrode, a negative electrode, and an electrolytic layer interposed between the positive electrode and the negative electrode, and arranged in a pair so as to sandwich the cell member.
  • a bipolar storage battery comprising a plurality of plates, having a pillar connecting between the opposing plates, the pillar being a one-side pillar portion protruding from one of the opposing plates , and the other side pillar portion protruding from the other plate are joined by welding.
  • the pillars connect the opposing plates, even if corrosion due to the sulfuric acid contained in the electrolyte occurs and gas is generated due to the corrosion, expansion of the cells can be prevented and the space between the cells can be prevented.
  • By maintaining airtightness and mechanical strength inside the cell it is possible to provide a bipolar storage battery that can be made compact while reducing the number of parts.
  • pillars are protruding from both sides of the stacked plates. Then, the one-side pillar portion and the other-side pillar portion, which are arranged at positions facing each other, are welded and joined. Therefore, even if corrosion occurs due to sulfuric acid contained in the electrolytic solution and gas is generated due to the corrosion, expansion of the cell can be prevented. Therefore, it is possible to maintain the airtightness and mechanical strength inside the cells while maintaining the distance between the cells, so that the number of parts in the bipolar storage battery can be reduced and the size can be reduced.
  • FIG. 1 is a cross-sectional view showing the structure of a bipolar lead-acid battery according to an embodiment of the present invention
  • FIG. 1 is an enlarged cross-sectional view showing the structure of a pillar portion in a bipolar lead-acid battery according to an embodiment of the present invention
  • FIG. 4 is an enlarged cross-sectional view showing a step of stacking adjacent bipolar plates in the embodiment of the present invention
  • FIG. 5 is an explanatory diagram for explaining the depth of welding with respect to welding used in the embodiment of the present invention
  • FIG. 2 is a graph showing test results obtained with respect to an embodiment of the present invention
  • FIG. FIG. 4 is an enlarged cross-sectional view showing the structure of another pillar portion of the bipolar lead-acid battery according to the embodiment of the present invention
  • FIG. 1 is a cross-sectional view illustrating the structure of a bipolar lead-acid battery 1 according to an embodiment of the invention.
  • a second plate unit fixed inside and a substrate (hereinafter, this “substrate” is referred to as a “bipolar plate”) 111 have a bipolar plate with a positive electrode 120 provided on one surface and a negative electrode 110 provided on the other surface. It has a third plate unit in which the electrode 130 is fixed inside the frame plate-shaped third plate (rim) 13, and a fourth plate unit in which the positive electrode 120 is fixed to the flat plate-shaped fourth plate (end plate) 14. .
  • the bipolar lead-acid battery 1 having a substantially rectangular parallelepiped shape is configured.
  • the numbers of the stacked second plate units and the number of the third plate units are set so that the storage capacity of the bipolar lead-acid battery 1 becomes a desired value.
  • a 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 a positive electrode 120 fixed to the fourth plate 14 and the positive electrode terminal 108 are electrically connected.
  • the first plate 11 to fourth plate 14 are made of, for example, known molding resin. These first plate 11 to fourth plate 14 are fixed to each other by a suitable method so that the inside thereof is sealed so that the electrolytic solution does not flow out.
  • the bipolar plate 111 is made of thermoplastic resin, for example.
  • the thermoplastic resin forming the bipolar plate 111 include acrylonitrile-butadiene-styrene copolymer (ABS resin) and polypropylene. These thermoplastic resins have excellent moldability and excellent sulfuric acid resistance. Therefore, even if the electrolyte comes into contact with the bipolar plate 111, the bipolar plate 111 is unlikely to be decomposed, deteriorated, corroded, or the like.
  • the bipolar plate 111 is provided with a communication hole that allows communication between one surface and the other surface (not shown). Then, the positive electrode lead layer 101 and the negative electrode lead layer 102 are joined to each other through the communication hole, thereby electrically connecting the two to achieve conduction between the positive electrode and the negative electrode.
  • the positive electrode 120 is made of lead or a lead alloy and includes a positive electrode lead layer 101 arranged on one surface of the bipolar plate 111, a positive electrode active material layer 103 arranged on the positive electrode lead layer 101, It has The positive electrode lead layer 101 is adhered to one surface of the bipolar plate 111 by an adhesive layer such as an adhesive (not shown) provided between the one surface of the bipolar plate 111 and the positive electrode lead layer 101 . Therefore, on one side of the bipolar plate 111 (the side facing upward in the drawings such as FIG. 2 to be described later), the adhesive layer, the positive electrode lead layer 101, and the positive electrode active material layer 103 are arranged as described in this description. They are stacked in order.
  • the negative electrode 110 is made of lead or a lead alloy and is arranged on the other side of the bipolar plate 111 (the side facing downward in the drawings such as FIG. 2). and a negative electrode active material layer 104 disposed on the layer 102 .
  • the negative electrode lead layer 102 is adhered to the other surface of the bipolar plate 111 by an adhesive layer such as an adhesive (not shown) 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 through the communication hole described above.
  • the bipolar plate 111 has a pillar 150 substantially at its center. Specifically, as shown in FIGS. 1 and 2, one side pillar portion 150A and the other side pillar portion 150B are provided so as to protrude toward both the positive electrode side and the negative electrode side of one bipolar plate 111. there is
  • the pillar 150 is configured by joining one side pillar portion 150A and the other side pillar portion 150B facing each other. Therefore, the adjacent bipolar plates 111, or the bipolar plate 111 and the first plate 11, or the fourth plate 14 (hereinafter these plates are simply referred to as "plates" when collectively indicated). ) are laminated, the plates 11, 111 and 14 facing each other in pairs are connected to each other to support each other.
  • the pillar 150 is provided only in the substantially central portion of each plate 11, 14, 111. , may be provided at a plurality of locations.
  • first plate 11 is provided with the other-side pillar portion 150B
  • fourth plate 14 is provided with the one-side pillar portion 150A.
  • first plate 11 and the fourth plate 14 are arranged at both ends of the bipolar lead-acid battery 1, and are joined so as to sandwich the plurality of bipolar plates 111. Pillar portions 150A and 150B are provided only toward the opposing sides.
  • the electrolytic layer 105 is composed of, for example, a glass fiber mat impregnated with an electrolytic solution containing sulfuric acid.
  • the electrolytic layer 105 is provided so as to be sandwiched between the positive electrode active material layer 103 provided on one of the opposing bipolar plates 111 and the negative electrode active material layer 104 provided on the other bipolar plate 111 .
  • the bipolar plate 111, the positive electrode lead layer 101, the positive electrode active material layer 103, the negative electrode lead layer 102, and the negative electrode active material layer 102 are provided.
  • the material layer 104 constitutes a bipolar electrode 130 .
  • a bipolar electrode is a single electrode that functions as both a positive electrode and a negative electrode.
  • a cell member 140 having an electrolytic layer 105 interposed between a positive electrode 120 and a negative electrode 110 is arranged in a pair so as to sandwich the cell member 140.
  • the cell members 140 are connected in series to form a battery configuration.
  • the bipolar plate 111 and the end plates 11 and 14 correspond to the plurality of plates according to the invention.
  • FIG. 2 is an enlarged cross-sectional view showing the structure of the pillar 150 portion in the bipolar lead-acid battery 1 according to the embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view showing an enlarged pillar portion of adjacent bipolar plates in the bipolar lead-acid battery 1 according to the embodiment of the present invention.
  • the bipolar plate arranged on the upper side of the drawing is referred to as a first (one) bipolar plate 111A
  • the bipolar plate arranged on the lower side of the drawing is referred to as a second (other) bipolar plate 111B.
  • positive electrodes 120A and 120B are provided on one surface, and negative electrodes 110A and 110B are provided on the other surface.
  • An electrolytic layer 105 is provided between the negative electrode 110A side of the first bipolar plate 111A and the positive electrode 120B side of the second bipolar plate 111B arranged in a pair at a position opposite thereto, and a cell member 140 is provided. is configured.
  • the negative electrode side of the first bipolar plate 111A that is, the other surface on which the negative electrode lead layer 102A is provided
  • the positive electrode side of the second bipolar plate 111B that is, one surface on which the positive electrode lead layer 101B is provided. are positioned opposite each other as described above.
  • the distance between these one surface and the other surface, that is, the distance between the pair of opposing plates 111A and 111B is hereinafter referred to as "inter-cell distance L1".
  • the first bipolar plate 111A and the second bipolar plate 111B are provided with one-side pillar portions 150A and the other-side pillars 150B, respectively. That is, the one-side pillar portion 150A is provided so as to protrude from one surface in a direction perpendicular to the one surface on which the positive electrodes 120A and 120B are provided, and the other surface on which the negative electrodes 110A and 110B are provided. The other-side pillar portion 150B is provided so as to protrude from the other surface in a direction perpendicular to the surface.
  • bipolar plates 111A and 111B For convenience of explanation, the case of the bipolar plates 111A and 111B will be explained. It is the same as the bipolar plate 111 except that
  • the other-side pillar portion 150B of the first bipolar plate 111A and the one-side pillar portion 150A of the second bipolar plate 111B are arranged to face each other. When the plate 111B is laminated, it is welded and joined.
  • FIG. 3 is an enlarged cross-sectional view showing the process of stacking the bipolar plates 111 in this embodiment.
  • the first bipolar plate 111A and the second bipolar plate 111B are not yet joined.
  • positive electrodes 120A and 120B are provided on one surface of the respective bipolar plates 111A and 111B, and 110A and 110B are provided on the other surface. state.
  • the first bipolar plate 111A and the second bipolar plate 111B in the above-described state are brought closer to join the one-side pillar portion 150A and the other-side pillar portion 150B.
  • the one-side pillar portion 150A and the other-side pillar portion 150B are joined in this manner to form the pillar 150.
  • a cell is formed in the region defined by the plates 111A and 111B by the pillar 150, and the cell member 140 is attached to the cell. be accommodated.
  • vibration welding is performed by vibrating surfaces to be welded while pressurizing them during welding, and the welding cycle is fast and reproducibility is good. Therefore, vibration welding is more preferably used.
  • the vibration welding is performed in this way, for example, the following relationship is established between the depth of welding and the distance L1 between the cells when vibration welding is performed between the one-side pillar portion 150A and the other-side pillar portion 150B. It is preferable if the value of the welding depth is set so that this holds true. Although there are various lengths for the distance L1 between the cells, it can be preferably selected from the range of 5.0 mm to 15.0 mm, for example.
  • FIG. 4 is an explanatory diagram illustrating the depth of welding used in the embodiment of the present invention.
  • FIG. 4 shows how two members shown above and below are welded by vibration welding. From the left, (a) contact, (b) during vibration welding, and (c) after welding. . That is, transition of the welding process is shown from (a) to (c).
  • the upper member will be referred to as “upper member” and the lower member will be referred to as "lower member”.
  • FIG. 4 shows a state in which the upper member and the lower member are in contact with each other. In this state, vibration welding has not yet been performed, and only the upper member and the lower member are in contact with each other. Also, in FIG. 4, the end of the upper member and the end of the lower member are drawn with dashed lines. That is, the height between the dashed lines is the height of the upper member and the lower member before welding.
  • the members are vibrated while pressing both the upper member and the lower member in the vertical direction.
  • the member to be vibrated may be either the upper member or the lower member, or may be both.
  • the upper member is vibrated here.
  • the lower member is fixed.
  • Conditions for vibration welding include frequency, amplitude, time, stress, and the like.
  • the joint surface melts after joining, so that the height of the upper member and the lower member becomes shorter than before joining.
  • the difference between the height of the upper member and the lower member before joining and the height of the upper member and the lower member after joining is the welding depth indicated by symbol W in FIG.
  • the welding depth is one of the conditions taken into consideration when performing the above-described vibration welding, and is preferably set as follows.
  • the ratio of the welding depth w between the one-side pillar portion 150A and the other-side pillar portion 150B to the distance L1 between the cells is set to 5% or more and 30% or less, and 9% or more to 26%. % or less, and more preferably 13% or more and 16% or less.
  • This ratio is one of the preferable conditions set when performing vibration welding.
  • the one-side pillar portion 150A and the other-side pillar portion 150B can be reliably joined with a sufficient strength, and the above-described gas generation causes a cell failure. It is preferable because the expansion of is greatly suppressed.
  • the ratio of the welding depth w to the distance L1 between the cells exceeds 30%, burrs may occur at the joints during welding, resulting in wasted material, This is not preferable because there is a possibility that the resin welded to 105 may enter.
  • the ratio is less than 5%, it becomes difficult to obtain sufficient welding strength, which is not preferable. Therefore, it is preferable to set the range as described above.
  • the outer diameter of the one-side pillar portion 150A or the other-side pillar 150B is, for example, 5.0 mm or more and 30.0 mm or less. This is because within this range, adverse effects on the battery capacity of the bipolar lead-acid battery 1 can be largely suppressed.
  • the one-side pillar portion 150A and the other-side pillar portion 150B have the same size. That is, the area of the joint surface 150a of the one-side pillar portion 150A and the area of the joint surface 150b of the other-side pillar portion 150B, which are arranged in pairs and are joined to each other, are both the same size. .
  • the ratio of the area of the joint surface 150b of the other-side pillar portion 150B to the area of the joint surface 150a of the one-side pillar portion 150A is preferably 50% or more and 150% or less. That is, when the area of the joint surface 150a of the one-side pillar portion 150A is taken as a reference, the area of the joint surface 150b of the other-side pillar portion 150B is preferably between half and 1.5 times. More preferably, it is 70% or more and 130% or less, and particularly preferably 80% or more and 120% or less.
  • the bipolar plates 111A and 111B are designed to withstand the breaking force when the one-side pillar portion 150A protruding from the bipolar plates 111A and 111B is pressed toward the bipolar plates 111A and 111B. It is preferable that the ratio of the breaking force when the other side pillar portion 150B projecting from 111A and 111B is pressed toward the bipolar plates 111A and 111B and broken is 80% or more and 120% or less.
  • the ratio is more preferably 88% or more and 112% or less, particularly 92% or more and 108% or less.
  • the above numerical values relating to the breaking force are the maximum force until the pillar portions 150A and 150B protruding from the bipolar plates 111A and 111B are pressed toward the bipolar plates 111A and 111B at a compression rate of 2 mm/min until they break. After obtaining the force, it is shown as the above ratio.
  • FIG. 5 is a graph showing the relationship between the two, and is a graph showing the test results obtained with respect to the embodiment of the present invention.
  • the horizontal axis indicates the ratio of the area of the pillar portion (area ratio)
  • the vertical axis indicates the ratio of breaking force in the pillar portion.
  • the proportional relationship between the two is indicated by a solid line. You will pass the 100% point.
  • the breaking strength ratio indicated by the dashed line is 70% or more and 130% or less
  • the breaking strength ratio is 88% or more and 112% or less
  • the most preferable value is that the area ratio is 80% or more and 120% or less. is 92% or more and 102% or less, and is indicated by a dashed line.
  • the first and second bipolar plates 111A and 111B are pillars 150 in which the one-side pillar portion 150A and the other-side pillar portion 150B are vibration-welded so as to butt against each other. Then, even if corrosion occurs due to sulfuric acid contained in the electrolyte and gas is generated due to the corrosion, expansion of the cells can be prevented, so that the distance L1 between the cells can be maintained.
  • the distance L1 between the cells can be maintained in this way, it is possible to prevent leakage of gas due to expansion of the cells, and ensure airtightness and mechanical strength inside the cells.
  • forming the pillar 150 by joining the one-side pillar portion 150A and the other-side pillar portion 150B inside the cell by vibration welding leads to reduction in the number of parts of the bipolar storage battery and reduction in size. .
  • the pillars 150 described so far are provided so as to protrude from both one surface and the other surface of the bipolar plate 111 . Therefore, when adjacent bipolar plates are stacked, the other-side pillar portion 150B of the first bipolar plate 111A and the one-side pillar portion 150A of the second bipolar plate 111B are arranged to face each other. Parts 150A and 150B are joined by vibration welding. However, regarding the way of providing the pillars 150 on the bipolar plate 111, it is conceivable that the pillars 150 may not be formed in such a shape.
  • FIG. 6 is an enlarged cross-sectional view showing the structure of another pillar portion 140 of the bipolar lead-acid battery 1 according to the embodiment of the present invention. Note that FIG. 6 omits illustration of the positive electrode 120A in the first bipolar plate 111A and the negative electrode 110B in the second bipolar plate 111B.
  • the pillars 150 described so far are provided so as to protrude from both one side and the other side of the bipolar plate 111 , but here the pillars 151 are located on one side of the bipolar plate 111 . It is provided so as to protrude only from the surface.
  • the pillars 151B extend from one surface of the second bipolar plate 111B on which the positive electrode 120B is provided toward the other surface of the first bipolar plate 111A on which the negative electrode 110A is provided. is provided to protrude. That is, the joint surface of the pillar 151B is arranged to face the other surface of the first bipolar plate 111A.
  • the pillar 151B is bonded to the other surface by vibration welding at the bonding surface.
  • the bipolar plates 111A and 111B are provided with such pillars 151A and 151B (hereinafter, when these pillars are collectively indicated, they are appropriately referred to as "pillars 151"), and the pillars 151A and 151B are arranged at positions facing each other.
  • the opposing bipolar plates can be joined by being joined to the other surfaces of the bipolar plates 111A and 111B. Therefore, even if corrosion occurs due to sulfuric acid contained in the electrolytic solution and gas is generated due to the corrosion, expansion of the cell can be prevented. By maintaining the distance between the cells and securing the airtightness and mechanical strength inside the cells, it is possible to reduce the number of parts of the bipolar storage battery and to make it more compact.
  • the embodiment of the present invention has been described by taking a bipolar lead-acid battery as an example.
  • other storage batteries that use other metals (e.g., aluminum, copper, nickel), alloys, and conductive resins instead of lead for the current collector, the application is naturally excluded. not something to do.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

Batterie de stockage bipolaire qui peut maintenir une distance entre des cellules en empêchant une expansion des cellules et peut assurer une résistance mécanique et une étanchéité à l'air à l'intérieur des cellules même si une corrosion se produit en raison de l'acide sulfurique contenu dans une solution électrolytique, ce qui permet de produire un gaz. La batterie de stockage bipolaire (1) comprend : un élément de cellule (140) possédant une cathode (120), une anode (110) et une couche électrolytique (105) ; et des plaques d'extrémité (11, 14) et une pluralité de plaques bipolaires (111) agencées formant une paire de manière à prendre en sandwich l'élément de cellule (140). Un pilier (150) faisant la liaison entre des plaques (111, 11, 14) opposées est disposé entre celles-ci. Le pilier (150) est obtenu par le soudage et le collage, d'une manière opposée, d'une partie pilier d'un premier côté (150A) projetée sur une première surface de la plaque bipolaire (111) et de la plaque d'extrémité (14), et d'une partie pilier de l'autre côté (150B) projetée sur l'autre surface de la plaque bipolaire (111) et de la plaque d'extrémité (11).
PCT/JP2021/047001 2021-02-10 2021-12-20 Batterie de stockage bipolaire WO2022172596A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10106610A (ja) * 1996-09-30 1998-04-24 Sanyo Electric Co Ltd 燃料電池
JP2019091596A (ja) * 2017-11-14 2019-06-13 株式会社豊田自動織機 蓄電モジュールの製造方法
JP6571091B2 (ja) * 2013-12-30 2019-09-04 グリッドテンシャル エナジー インコーポレイテッドＧｒｉｄｔｅｎｔｉａｌ Ｅｎｅｒｇｙ，Ｉｎｃ． 密閉型バイポーラ電池アセンブリ及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10106610A (ja) * 1996-09-30 1998-04-24 Sanyo Electric Co Ltd 燃料電池
JP6571091B2 (ja) * 2013-12-30 2019-09-04 グリッドテンシャル エナジー インコーポレイテッドＧｒｉｄｔｅｎｔｉａｌ Ｅｎｅｒｇｙ，Ｉｎｃ． 密閉型バイポーラ電池アセンブリ及びその製造方法
JP2019091596A (ja) * 2017-11-14 2019-06-13 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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