WO2022074707A1 - Collecteur de courant et batterie au plomb-acide - Google Patents

Collecteur de courant et batterie au plomb-acide Download PDF

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Publication number
WO2022074707A1
WO2022074707A1 PCT/JP2020/037703 JP2020037703W WO2022074707A1 WO 2022074707 A1 WO2022074707 A1 WO 2022074707A1 JP 2020037703 W JP2020037703 W JP 2020037703W WO 2022074707 A1 WO2022074707 A1 WO 2022074707A1
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WIPO (PCT)
Prior art keywords
current collector
support portion
opening
length
pair
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Application number
PCT/JP2020/037703
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English (en)
Japanese (ja)
Inventor
格 瀬和
素子 原田
秀隆 関戸
Original Assignee
昭和電工マテリアルズ株式会社
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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Publication date
Application filed by 昭和電工マテリアルズ株式会社 filed Critical 昭和電工マテリアルズ株式会社
Priority to PCT/JP2020/037703 priority Critical patent/WO2022074707A1/fr
Publication of WO2022074707A1 publication Critical patent/WO2022074707A1/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/73—Grids for lead-acid accumulators, e.g. frame plates
    • 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

Definitions

  • the present invention relates to a current collector and a lead storage battery.
  • a lead-acid battery is configured by accommodating a group of electrode plates having a plurality of electrode plates in which a current collector is filled with an active material in an electric tank.
  • a current collector is filled with an active material in an electric tank.
  • positive electrode plates and negative electrode plates which are electrode plates, are alternately laminated via a separator, and the positive electrode plate and the ear portion of the negative electrode plate are collectively welded to the strap for each polarity, and the inter-cell connection portion or the inter-cell connection portion or the strap is connected to the strap.
  • the pole columns are connected and configured.
  • Patent Document 1 describes an expanded current collector in which a mesh-like lattice portion is formed between an upper frame bone and a lower frame bone by expanding and developing a lead alloy sheet.
  • the lattice portion is punched, cast, or the like.
  • a current collector may be used.
  • a pair of horizontal frame bones are provided on both sides of the lattice portion. Such a pair of horizontal frame bones inhibits the elongation of the current collector in the vertical direction of the electric tank.
  • the current collector In lead-acid batteries, the current collector extends in the vertical direction of the battery case due to repeated charging and discharging. In addition, the current collector extends in the vertical direction of the electric tank with the passage of time. Therefore, when the extension of the current collector in the vertical direction of the electric tank is hindered by the pair of horizontal frame bones, the current collector flexes irregularly and the active material easily falls off from the current collector. As a result, the life of the lead-acid battery is shortened.
  • one aspect of the present invention is to provide a current collector and a lead storage battery capable of suppressing irregular bending of the current collector and suppressing dropping of an active material from the current collector. ..
  • the present inventor suppresses irregular bending of the current collector by setting the shape of the opening formed in the lattice portion to a predetermined condition, and the active material from the current collector. It was found that it is possible to suppress the dropout of.
  • One aspect of the present invention has been made based on this finding.
  • the current collector includes a grid portion having a plurality of openings, a first support portion provided at one end of the grid portion and extending in the first direction, and both sides of the grid portion in the first direction.
  • a second support portion and a third support portion extending from the first support portion are provided, and the length of the opening in the first direction is set to A, and the length of the opening in the second direction orthogonal to the first direction is set to A.
  • the A / B of the opening having the largest A + B among the plurality of openings is 0.5 or more and 2.5 or less.
  • This current collector is provided with a second support portion and a third support portion located on both sides of the first support portion.
  • the A / B of the opening having the largest sum of the length A and the length B is 2.5 or less, irregular bending of the current collector is suppressed. As a result, it is possible to prevent the active material from falling off from the current collector. Further, since the A / B of the opening having the largest sum of the length A and the length B is 0.5 or more, it is possible to prevent the opening from becoming too small. As a result, the weight of the current collector can be reduced and the amount of the active material attached can be increased.
  • the plurality of openings may be formed in a honeycomb shape.
  • the rigidity of the lattice portion is increased. This makes it possible to suppress the bending of the current collector.
  • the opening may be formed in a rectangular shape having a pair of first sides extending in the first direction and a pair of second sides extending in the second direction and connected to the pair of first sides.
  • the current collector since the opening is formed in a rectangular shape, the current collector can be easily manufactured.
  • the opening is a pair of first sides extending in the direction of inclining in the first and second directions and a pair of second sides extending in a direction intersecting the pair of first sides and connected to the pair of first sides. It may be formed in a diamond shape having a. In this current collector, the opening is formed in a diamond shape, so that the current collector can be easily manufactured.
  • a fourth support portion provided at the other end of the lattice portion opposite to the first support portion and extending in the first direction may be further provided.
  • the rigidity of the lattice portion is increased by providing the fourth support portion. This makes it possible to suppress the bending of the current collector.
  • the selvage portion is further provided so as to project from the first support portion to the side opposite to the grid portion, and the portion of the grid portion in the vicinity of the selvage portion may be formed thicker than the other portion of the grid portion. ..
  • the portion near the selvage portion of the grid portion is formed thicker than the other portion of the grid portion, so that the current collecting efficiency of the current collector can be improved.
  • the lead storage battery according to one aspect of the present invention includes any of the above current collectors. Since this lead-acid battery includes any of the above-mentioned current collectors, irregular bending of the current collector can be suppressed, and the active material can be suppressed from falling out of the current collector. As a result, the life of the lead storage battery can be extended.
  • a positive electrode plate having the above-mentioned current collector and an active material attached to the current collector may be provided. Since the current collector of the positive electrode plate is more likely to extend in the vertical direction of the electric tank due to repeated charging and discharging and the passage of time than the current collector of the negative electrode plate, at least the positive electrode plate has the above-mentioned current collector. It is possible to effectively suppress the dropping of the active material from the current collector of the lead-acid battery as a whole.
  • FIG. 1 is a perspective view showing the overall structure and internal structure of the lead storage battery according to the embodiment.
  • FIG. 2 is a perspective view showing a group of plates included in the lead-acid battery of FIG.
  • FIG. 3 is a front view showing an electrode plate included in the electrode plate group of FIG. 2.
  • FIG. 4 is a front view showing an example current collector.
  • FIG. 5 is a partially enlarged view of the current collector shown in FIG.
  • FIG. 6 is a front view showing a current collector of another example.
  • FIG. 7 is a partially enlarged view of the current collector shown in FIG.
  • FIG. 8 is a front view showing a current collector of another example.
  • FIG. 9 is a partially enlarged view of the current collector shown in FIG.
  • FIG. 10 is a front view showing a current collector of another example.
  • FIG. 11 is a front view showing the current collector of Comparative Example 1.
  • FIG. 12 is a partially enlarged view of the current collector shown in FIG.
  • FIG. 13 is a front view showing a simulation result of the current collector of the first embodiment.
  • FIG. 14 is a front view showing a simulation result of the current collector of the second embodiment.
  • FIG. 15 is a front view showing a simulation result of the current collector of the third embodiment.
  • FIG. 16 is a front view showing a simulation result of the current collector of the fourth embodiment.
  • FIG. 17 is a front view showing a simulation result of the current collector of Comparative Example 1.
  • FIG. 18 is a graph showing the measurement results of the average voltage drop of Examples 1 to 4 and Comparative Example 1.
  • FIG. 19 is a front view showing a current collector of another example.
  • the vertical direction refers to the vertical direction in the lead storage battery.
  • a or B may include either A or B, and may include both.
  • the lead-acid battery 1 includes an electric tank 2 having an open upper surface and a lid 3 for closing the opening of the electric tank 2.
  • the battery case 2 and the lid 3 are made of polypropylene, for example.
  • the lid 3 is provided with a positive electrode terminal 4, a negative electrode terminal 5, and a liquid port plug 6 for closing the liquid injection port provided in the lid 3.
  • Electrode plate group 7 Inside the battery case 2, there are a electrode plate group 7, a positive electrode column (not shown) connecting the electrode plate group 7 to the positive electrode terminal 4, and a negative electrode column 8 connecting the electrode plate group 7 to the negative electrode terminal 5.
  • an electrolytic solution (not shown) such as dilute sulfuric acid.
  • the electrode plate group 7 is configured by laminating a plurality of positive electrode plates 9 and a plurality of negative electrode plates 10 via a separator 11.
  • the positive electrode plate 9 is the electrode plate 20 on the positive electrode side
  • the negative electrode plate 10 is the electrode plate 20 on the negative electrode side.
  • the positive electrode plate 9 and the negative electrode plate 10 are different from the electrode plate on the positive electrode side and the electrode plate of the negative electrode plate, they basically have the same configuration.
  • the electrode plate 20 will be collectively described.
  • the electrode plate 20 has a current collector (lattice) 21 and an active material (electrode material) 22 attached to the current collector 21. That is, the positive electrode plate 9 has a positive electrode current collector (positive electrode lattice body) 12 and a positive electrode active material (positive electrode material) 13 attached to the positive electrode current collector 12.
  • the negative electrode plate 10 has a negative electrode current collector (negative electrode lattice body) 14 and a negative electrode active material (negative electrode material) 15 attached to the negative electrode current collector 14.
  • the current collector 21 is made of a lead alloy.
  • the lead alloy may be an alloy containing tin, calcium, antimony, selenium, silver, bismuth and the like in addition to lead, and specifically, for example, an alloy containing lead, tin and calcium (Pb-Sn). -Ca-based alloy).
  • the electrode plate group 7 has a structure in which a plurality of positive electrode plates 9 and a plurality of negative electrode plates 10 are alternately laminated in a direction substantially parallel to the opening surface of the electric tank 2 via a separator 11. That is, the positive electrode plate 9 and the negative electrode plate 10 are arranged so that their main surfaces extend in the direction perpendicular to the opening surface of the battery case 2.
  • the selvage portions 28 of the positive electrode current collectors 12 in the plurality of positive electrode plates 9 are collectively welded by the positive electrode side strap 16.
  • the ears 28 of each of the negative electrode current collectors 14 in the plurality of negative electrode plates 10 are collectively welded by the negative electrode side strap 17.
  • the positive electrode side strap 16 and the negative electrode side strap 17 are connected to the positive electrode terminal 4 and the negative electrode terminal 5 via the positive electrode column and the negative electrode column 8, respectively.
  • the separator 11 has a function of separating the positive electrode plate 9 and the negative electrode plate 10.
  • the separator 11 has microporous so that the electrolytic solution (dilute sulfuric acid) can pass through.
  • the separator 11 is made of a microporous resin sheet. Examples of the resin used for the separator 11 include polyolefin.
  • the electric tank 2 is a container for accommodating the electrode plate group 7.
  • the inside of the battery case 2 is divided into a plurality of sections by a plurality of partition walls (not shown), and a plurality of cell chambers (not shown) are formed.
  • the cell chamber is a space in which the electrode plate group 7 is inserted.
  • the electrode plate group 7 is also called a cell, and has an electromotive force of 2V.
  • the number of cell chambers is not limited to six.
  • a plurality of saddles (not shown) extending along the direction in which the plurality of cell chambers are arranged may be formed on the bottom surface of the electric tank 2. in this case.
  • the electrode plate group 7 is placed on the saddle or is arranged above the saddle at a distance.
  • the current collector 21 includes a grid portion 23, a first support portion 24, a second support portion 25, a third support portion 26, a fourth support portion 27, and ears. It has a portion 28 and.
  • the grid portion 23 is a portion that holds the active material 22.
  • the lattice portion 23 is formed in a lattice shape (net shape) in order to hold the active material 22.
  • a plurality of openings 29 are formed in the lattice portion 23.
  • the first support portion 24 extends in the first direction D1.
  • the first support portion 24 is provided at one end of the grid portion 23 in the second direction D2 orthogonal to the first direction D1.
  • the first support portion 24 supports the grid portion 23 from one end side in the second direction D2.
  • the shape of the first support portion 24 is not particularly limited, and is, for example, an elongated flat plate in the first direction D1.
  • the second support portion 25 is provided at one end of the grid portion 23 in the first direction D1.
  • the second support portion 25 extends from the first support portion 24 on one end side of the grid portion 23 in the first direction D1.
  • the second support portion 25 supports the grid portion 23 from one end side in the first direction D1.
  • the shape of the second support portion 25 is not particularly limited, and is, for example, an elongated flat plate or rod in the second direction D2.
  • the third support portion 26 is provided at the other end of the grid portion 23 in the first direction D1 (the side opposite to the second support portion 25).
  • the third support portion 26 extends from the first support portion 24 on the other end side of the grid portion 23 in the first direction D1.
  • the third support portion 26 supports the grid portion 23 from the other end side in the first direction D1.
  • the shape of the third support portion 26 is not particularly limited, and is, for example, an elongated flat plate or rod in the second direction D2.
  • the fourth support portion 27 extends in the first direction D1.
  • the fourth support portion 27 is provided at the other end of the grid portion 23 in the second direction D2 (the side opposite to the first support portion 24).
  • the fourth support portion 27 supports the grid portion 23 from the other end side in the second direction D2.
  • the shape of the fourth support portion 27 is not particularly limited, and is, for example, an elongated flat plate or rod in the first direction D1. Both ends of the fourth support portion 27 are connected to the second support portion 25 and the third support portion 26. That is, each of the second support portion 25 and the third support portion 26 connects the first support portion 24 and the fourth support portion 27.
  • the selvage portion 28 protrudes from the first support portion 24 on the side opposite to the grid portion 23 in the second direction D2.
  • the first support unit 24 also functions as a current collector unit. Therefore, in front view, the area of the first support portion 24 is larger than the area of each of the second support portion 25, the third support portion 26, and the fourth support portion 27 from the viewpoint of improving the current collection efficiency. Is preferable.
  • the current collector 21 may not have the fourth support portion 27, and may have another support portion other than the fourth support portion 27.
  • the second support portion 25 and the third support portion 26 may extend in a straight line from the first support portion 24 to the fourth support portion 27, may be bent and extended, or may be curved. ..
  • the second support portion 25 and the third support portion 26 may extend in the second direction D2, for example.
  • the second support portion 25 and the third support portion 26 may, for example, move from the first support portion 24 to the fourth support portion 27. It may extend to spread out from each other and then extend in the second direction D2 and be connected to the fourth support portion 27.
  • Examples of the current collector 21 include a punching lattice body in which a plurality of openings 29 of the lattice portion 23 are formed by punching, a cast lattice body in which a plurality of openings 29 of the lattice portion 23 are formed by casting, and the like.
  • the current collector 21 will be described as a punching grid.
  • the first support portion 24 and the fourth support portion 27 extend in parallel with the first direction D1, and the second support portion 25 and the third support portion 26 extend. It extends parallel to the second direction D2.
  • a plurality of rectangular openings 29 are formed in the lattice portion 23. That is, the opening 29 has a rectangular shape having a pair of first sides 29a extending in the first direction D1 and a pair of second sides 29b extending in the second direction D2 and connected to the pair of first sides 29a. It is formed. More specifically, the grid portion 23 has a plurality of first bone portions 23a extending in the first direction D1 and a plurality of second bone portions 23b extending in the second direction D2.
  • Both ends of the plurality of first bone portions 23a and the plurality of second bone portions 23b are connected to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27.
  • the plurality of first bone portions 23a and the plurality of second bone portions 23b form a plurality of rectangular openings 29 having a pair of first side 29a and a pair of second side 29b.
  • the rectangular shape includes both a square shape and a rectangular shape. Of the plurality of openings 29, the openings 29 adjacent to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27 do not have such a rectangular shape. May be good.
  • the first support portion 24 and the fourth support portion 27 extend in parallel with the first direction D1, and the second support portion 25 and the third support portion 26 extend. It extends parallel to the second direction D2.
  • a plurality of diamond-shaped openings 29 are formed in the lattice portion 23. That is, the opening 29 is connected to the pair of first sides 29c extending in the direction inclined in the first direction D1 and the second direction D2 and the pair of first sides 29c extending in the direction intersecting the pair of first sides 29c. It is formed in a diamond shape having a pair of second sides 29d. The pair of second sides 29d extends in the direction opposite to the pair of first sides 29c with respect to the first direction D1 and the second direction D2.
  • the lattice portion 23 extends in a direction inclined in the first direction D1 and the second direction D2, and a plurality of third bone portions 23c extending in the direction inclined in the first direction D1 and the second direction D2. It also has a plurality of fourth bone portions 23d extending in a direction intersecting the plurality of third bone portions 23c. Both ends of the plurality of third bone portions 23c and the plurality of fourth bone portions 23d are connected to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27. There is.
  • a plurality of rhombic openings 29 having a pair of first side 29c and a pair of second side 29d are formed by the plurality of third bone portions 23c and the plurality of fourth bone portions 23d.
  • This rhombus includes both a rhombus with right-angled corners and a rhombus without right-angled corners.
  • the openings 29 adjacent to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27 do not have such a diamond shape. May be good.
  • the first support portion 24 and the fourth support portion 27 extend in parallel with the first direction D1, and the second support portion 25 and the third support portion 26 extend. It extends parallel to the second direction D2.
  • a plurality of hexagonal openings 29 are formed in a honeycomb shape in the lattice portion 23. More specifically, the lattice portion 23 has a honeycomb bone portion 23e extending in a honeycomb shape. The end portion of the honeycomb bone portion 23e is connected to the first support portion 24, the fourth support portion 27, the second support portion 25, or the third support portion 26.
  • a plurality of hexagonal openings 29 are formed in a honeycomb shape by the honeycomb bone portion 23e. Of the plurality of openings 29, the openings 29 adjacent to the first support portion 24, the fourth support portion 27, the second support portion 25, or the third support portion 26 do not have such a hexagonal shape. May be good.
  • the first support portion 24 and the fourth support portion 27 extend in parallel with the first direction D1, and the second support portion 25 and the third support portion 26 are the first. After extending from the support portion 24 toward the fourth support portion 27 in a direction away from each other, it extends in parallel with the second direction D2 and is connected to the fourth support portion 27.
  • a plurality of hexagonal openings 29 are formed in a honeycomb shape in the lattice portion 23. More specifically, the lattice portion 23 has a honeycomb bone portion 23f extending in a honeycomb shape. The end portion of the honeycomb bone portion 23f is connected to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27.
  • a plurality of hexagonal openings 29 are formed in a honeycomb shape by the honeycomb bone portion 23f.
  • the hexagonal opening 29 is formed from the first side 29e and the second side 29f extending parallel to each other in the second direction D2, and the tip of the first side 29e and the second side 29f on the first support portion 24 side (upper side).
  • the third side 29g and the fourth side 29h extending in the direction close to each other and joining each other, and the tip of the fourth support portion 27 side (lower side) of the first side 29e and the second side 29f extend in the direction close to each other. It has six sides, a fifth side 29i and a sixth side 29j, which are joined to each other.
  • This hexagonal shape includes a hexagonal shape in which the length of each side and the angle of each side are all the same, and a hexagonal shape in which at least one of the lengths of each side or at least one of the angles of each side is different.
  • the openings 29 adjacent to the first support portion 24, the second support portion 25, the third support portion 26, or the fourth support portion 27 do not have such a hexagonal shape. May be good.
  • the length A of the opening 29 in the first direction D1 is the length of the opening 29 in the first direction D1
  • the length B is the maximum length of the opening 29 in the second direction D2.
  • the length A of the opening 29 is the length of the second side 29b
  • the length B of the opening 29 is the length of the first side 29a.
  • the length A of the opening 29 is the first side 29c from the junction on the first support portion 24 side (upper side) between the first side 29c and the second side 29d.
  • the length B to the junction of the second side 29d and the fourth support portion 27 side (lower side), and the length B of the opening 29 is the second support portion between the first side 29c and the second side 29d. It is the length from the junction on the 25 side (left side) to the junction on the third support portion 26 side (right side) between the first side 29c and the second side 29d.
  • the length A of the opening 29 extends from the junction between the third side 29g and the fourth side 29h to the junction between the fifth side 29i and the sixth side 29j.
  • the length B of the opening 29 is the length from the first side 29e to the second side 29f.
  • the ratio (A / B) of the length A to the length B is 0.5 or more and 2.5 for the opening 29 having the largest sum (A + B) of the length A and the length B among the plurality of openings 29. It is as follows.
  • the A / B is preferably 0.6 or more, preferably 0.65 or more, 0.7 or more, 0.75 or more, and 0. 8 or more, or 0.85 or more is preferable.
  • the A / B is 2.0 or less, 1.5 or less, 1.25 or less, 1.2 or less, 1.15 or less, It is preferably 1.1 or less, or 1.05 or less.
  • the A / B is 0.6 or more and 2.0 or less, 0.65 or more and 1.5 or less, 0.7 or more and 2.0. Below, 0.75 or more and 1.5 or less, 0.8 or more and 1.25 or less, 0.85 or more and 1.2 or less, 0.85 or more and 1.15 or less, 0.85 or more and 1.1 or less, or 0. It is preferably 85 or more and 1.05 or less.
  • the current collector 21 shown in FIGS. 4 and 5 is the current collector of the first embodiment
  • the current collector 21 shown in FIGS. 6 and 7 is the current collector of the second embodiment
  • FIGS. 8 and 9 are used.
  • the current collector 21 shown in FIG. 10 was used as the current collector of Example 3
  • the current collector 21 shown in FIG. 10 was used as the current collector of Example 4.
  • a plurality of square openings 29 were formed by nine first bone portions 23a and nine second bone portions 23b. Further, the ratio (A / B) of the length A to the length B of the opening 29 having the largest sum (A + B) of the length A and the length B was set to 1.000.
  • a plurality of rhombic openings 29 were formed by 13 third bone portions 23c and 13 fourth bone portions 23d.
  • the opening 29 has a rhombic shape with right-angled corners. Further, the ratio (A / B) of the length A to the length B of the opening 29 having the largest sum (A + B) of the length A and the length B was set to 1.000.
  • a plurality of hexagonal openings 29 were formed by the honeycomb bone portions 23e. Hexagonal shape in which the length of each side and the angle of each side are all the same. Also, the ratio of length A to length B (A / B) of the opening 29 having the largest sum (A + B) of length A and length B. was set to 0.866.
  • a plurality of hexagonal openings 29 were formed by the honeycomb bone portion 23f. Hexagonal shape in which the length of each side and the angle of each side are all the same. Also, the ratio of length A to length B (A / B) of the opening 29 having the largest sum (A + B) of length A and length B. was set to 0.866.
  • the current collector 121 shown in FIGS. 11 and 12 was used as the current collector of Comparative Example 1.
  • the first support portion 124 and the fourth support portion 127 extend in parallel to the first direction D1, similarly to the current collector 21 of the first embodiment.
  • the second support portion 125 and the third support portion 126 extend in parallel with the second direction D2, and the selvage portion 128 protrudes from the first support portion 124.
  • the lattice portion 123 has a pair of first sides extending in the first direction D1 by six first bone portions 123a extending in the first direction D1 and ten second bone portions 123b extending in the second direction D2.
  • a plurality of rectangular openings 129 having a 129a and a pair of second sides 129b extending in the second direction D2 are formed.
  • the first side 129a was all the same, but the second side 129b was increased from the first support portion 124 side to the second support portion 125 side. That is, it is assumed that the opening 129 on the side of the second support portion 125 has the largest second side 129b.
  • the ratio (A / B) of the length A to the length B of the opening 129 having the largest sum (A + B) of the length A and the length B was set to 3.078.
  • Example 1 is shown in FIG. 13
  • the simulation result of Example 2 is shown in FIG. 14
  • the simulation result of Example 3 is shown in FIG. 15, and the simulation result of Example 4 is shown in FIG.
  • the simulation result of No. 1 is shown in FIG. In FIGS. 13 to 17, the four recesses formed in the fourth support portion correspond to the four saddles formed in the bottom surface of the electric tank 2.
  • the current collector 21 includes the fourth support portion 27 and the second support portion 25 located on both sides of the first support portion 24.
  • the A / B of the opening 29 having the largest sum of the length A and the length B is 2.5 or less, the irregular bending of the current collector 21 is suppressed. As a result, it is possible to suppress the dropping of the active material 22 from the current collector 21.
  • the A / B of the opening 29 having the largest sum of the length A and the length B is 0.5 or more, it is possible to prevent the opening 29 from becoming too small. As a result, the weight of the current collector 21 can be reduced and the amount of the active material 22 adhered to the current collector 22 can be increased.
  • the plurality of openings 29 are formed in a honeycomb shape, so that the rigidity of the lattice portion 23 is increased. Thereby, the bending of the current collector 21 can be suppressed. Further, since the opening 29 is formed in a rectangular shape, the current collector 21 can be easily manufactured. Further, since the opening 29 is formed in a diamond shape, the current collector 21 can be easily manufactured.
  • the rigidity of the grid portion 23 is increased by providing the third support portion 26. Thereby, the bending of the current collector 21 can be suppressed.
  • the lead storage battery 1 according to the present embodiment includes the above-mentioned current collector 21, irregular bending of the current collector 21 can be suppressed, and the active material 22 can be suppressed from falling off from the current collector 21. can. As a result, the life of the lead storage battery 1 can be extended.
  • the current collector 21 of the positive electrode plate 9 is more likely to extend in the vertical direction of the electric tank 2 due to repeated charging and discharging and the passage of time than the current collector 21 of the negative electrode plate 10, at least the positive electrode plate 9 is carried out.
  • the current collector 21 in the form it is possible to effectively suppress the dropping of the active material from the current collector 21 of the lead storage battery 1 as a whole.
  • the present invention is not limited to the above embodiment, and can be appropriately modified as long as it does not deviate from the gist of the present invention.
  • the thickness of the grid portion may be the same, or part or all may be different.
  • the portion 23g in the vicinity of the selvage portion of the grid portion 23A may be formed thicker than the other portion 23h of the grid portion 23A.
  • the electricity collected by the current collector 21A is output from the first support portion 24 through the selvage portion 28. Therefore, the current collecting efficiency of the current collector 21A can be improved by forming the portion 23g in the vicinity of the selvage portion of the grid portion 23A thicker than the other portion 23h of the grid portion 23A.
  • the thickness may be gradually increased from the other portion 23h of the grid portion 23A toward the portion 23g near the selvage portion of the grid portion 23A, and the other portion 23h of the grid portion 23A and the grid portion 23A may be gradually thickened.
  • the thickness may change stepwise with the portion 23 g in the vicinity of the ear portion.
  • the specific shapes of the lattice portion and the opening and the like have been described, but the shapes of the lattice portion and the opening and the like can be changed as appropriate.
  • the opening may be triangular.
  • the positive electrode current collector and the negative electrode current collector have been described as having basically the same configuration, but they may have different configurations from each other.
  • the positive electrode current collector may have the above-mentioned current collector configuration
  • the negative electrode current collector may have a different configuration from the above-mentioned current collector.
  • Electrode plate group 8 ... Negative electrode pillar, 9 ... Positive electrode plate, 10 ... Negative electrode plate , 11 ... Separator, 12 ... Positive electrode current collector, 13 ... Positive electrode active material, 14 ... Negative electrode current collector, 15 ... Negative electrode active material, 16 ... Positive electrode side strap, 17 ... Negative electrode side strap, 20 ... Electrode plate, 21 ... Collector, 21A ... Collector, 22 ... Active material, 23 ... Lattice, 23A ... Lattice, 23a ... First bone, 23b ... Second bone, 23c ...
  • lattice part 123a ... first bone Part, 123b ... Second bone part, 124 ... First support part, 125 ... Second support part, 126 ... Third support part, 127 ... Fourth support part, 128 ... Ear part, 129 ... Opening, 129a ... First Side 129b ... Second side, D1 ... First direction, D2 ... Second direction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

L'invention concerne un collecteur de courant comprenant : une partie de grille dans laquelle une pluralité d'ouvertures sont formées, une première partie de support disposée à une extrémité de la partie de grille et s'étendant dans la première direction, et une deuxième partie de support et une troisième partie de support situées des deux côtés de la partie de grille dans la première direction et s'étendant à partir de la première partie de support, la longueur de l'ouverture dans la première direction étant désignée par A, et la longueur de l'ouverture dans la seconde direction orthogonale à la première direction est désignée par B, le rapport A/B de l'ouverture ayant la plus grande A + B parmi la pluralité d'ouvertures est de 0,5 à 2,5 (inclus).
PCT/JP2020/037703 2020-10-05 2020-10-05 Collecteur de courant et batterie au plomb-acide WO2022074707A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2020/037703 WO2022074707A1 (fr) 2020-10-05 2020-10-05 Collecteur de courant et batterie au plomb-acide

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PCT/JP2020/037703 WO2022074707A1 (fr) 2020-10-05 2020-10-05 Collecteur de courant et batterie au plomb-acide

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WO2022074707A1 true WO2022074707A1 (fr) 2022-04-14

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63184562U (fr) * 1987-05-20 1988-11-28
JP2000311693A (ja) * 1999-04-16 2000-11-07 Samsung Sdi Co Ltd 集電体および電極並びにこれらを用いた２次電池
JP2001332251A (ja) * 2000-05-25 2001-11-30 Shin Kobe Electric Mach Co Ltd 鉛蓄電池用極板およびその製造方法
JP2010520607A (ja) * 2007-03-02 2010-06-10 ジョンソン コントロールズ テクノロジー カンパニー 電池用負極グリッド

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63184562U (fr) * 1987-05-20 1988-11-28
JP2000311693A (ja) * 1999-04-16 2000-11-07 Samsung Sdi Co Ltd 集電体および電極並びにこれらを用いた２次電池
JP2001332251A (ja) * 2000-05-25 2001-11-30 Shin Kobe Electric Mach Co Ltd 鉛蓄電池用極板およびその製造方法
JP2010520607A (ja) * 2007-03-02 2010-06-10 ジョンソン コントロールズ テクノロジー カンパニー 電池用負極グリッド

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