WO2022102013A1 - Separator for batteries, electrode, lead acid stroage battery, battery pack and electric automobile - Google Patents

Separator for batteries, electrode, lead acid stroage battery, battery pack and electric automobile Download PDF

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Publication number
WO2022102013A1
WO2022102013A1 PCT/JP2020/042065 JP2020042065W WO2022102013A1 WO 2022102013 A1 WO2022102013 A1 WO 2022102013A1 JP 2020042065 W JP2020042065 W JP 2020042065W WO 2022102013 A1 WO2022102013 A1 WO 2022102013A1
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WO
WIPO (PCT)
Prior art keywords
slit
battery
rib
battery separator
separator
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Application number
PCT/JP2020/042065
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French (fr)
Japanese (ja)
Inventor
智紀 武部
将典 村松
瑠璃子 今泉
Original Assignee
昭和電工マテリアルズ株式会社
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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/JP2020/042065 priority Critical patent/WO2022102013A1/en
Publication of WO2022102013A1 publication Critical patent/WO2022102013A1/en

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside 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

Definitions

  • the present invention relates to a battery separator, an electrode, a lead storage battery, an assembled battery, and an electric vehicle.
  • Lead-acid batteries are widely used as secondary batteries for industrial or consumer use, and in particular, lead-acid batteries for electric vehicles (so-called batteries), UPS (Uninterruptible Power Supply), disaster prevention (emergency) radios, telephones, etc. There is a lot of demand for lead-acid batteries for backup.
  • Patent Document 1 discloses a lead-acid battery including a plurality of electrode plates arranged so that positive electrode plates and negative electrode plates are alternately laminated, and an electric tank for accommodating the electrode plates.
  • the electrode plate group has a plurality of battery separators, and the separator body of the battery separator covers at least the lower end portion of either the positive electrode plate or the negative electrode plate.
  • the electric tank supports the electrode plate group by a plurality of convex portions (kura, etc.) provided on the bottom surface of the electric tank.
  • a slit is formed in a portion covering the end portion of the separator main body, and the electrolytic solution in the electric tank can be circulated through this slit.
  • the slit may be blocked by the convex portion on the bottom surface of the battery case, which may hinder the flow of the electrolytic solution.
  • one aspect of the present invention is to provide a battery separator, an electrode, a lead storage battery, an assembled battery, and an electric vehicle capable of avoiding obstruction of the flow of the electrolytic solution through the slit. ..
  • the battery separator includes a separator main body that covers at least the lower end of a plate housed upright in an electric tank, and the electric tank is provided integrally or separately on the bottom surface of the electric tank. It has a plurality of convex portions that support the electrode plate, and a slit is formed in a portion that covers the lower end portion of the separator main body, and the center of the slit is located between a pair of adjacent convex portions.
  • the length of the slit may be larger than the width of the convex portion in the horizontal direction orthogonal to the thickness direction of the electrode plate. In this case, even if the convex portion is located at a position overlapping a part of the slit, the electrolytic solution can be circulated through the other part of the slit.
  • the length of the slit may be smaller than the distance between the pair of adjacent convex portions in the horizontal direction orthogonal to the thickness direction of the electrode plate.
  • the slit is likely to exist at a position that does not overlap with the convex portion, and it is easy to secure the flow path of the electrolytic solution through the slit.
  • the separator main body has a folded portion that bends so as to be folded back from one side in the thickness direction of the electrode plate to the other side, and the slit is formed in the folded portion. May be good. In this case, it is possible to avoid obstructing the flow of the electrolytic solution through the slit formed in the folded portion.
  • a plurality of slits may be formed in the folded portion. In this case, even if a part of the slits is blocked by another part in the folded portion, it becomes easy to secure the flow path of the electrolytic solution in the other slits.
  • some or all of the plurality of slits may have the same length. In this case, it becomes easy to control the flow amount of the electrolytic solution through the slit to be constant.
  • some or all of the plurality of slits may have different lengths. In this case, it becomes easy to determine the orientation of the battery separator at the time of manufacturing.
  • the plurality of slits may be formed at positions asymmetric with respect to the center line passing through the center in the thickness direction of the electrode plate at the folded portion. In this case, it becomes easy to determine the orientation of the battery separator at the time of manufacturing.
  • the separator main body has an inner surface on the electrode plate side and an outer surface on the opposite side of the inner surface, and a plurality of ribs are provided on at least one of the inner surface and the outer surface.
  • the slit may divide at least one rib. In this case, since the rib is located at the position of the end face of the slit, the strength of the end face of the slit can be increased by the rib.
  • the slit may divide a plurality of ribs.
  • the plurality of ribs are located at the positions of the end faces of the slits, the strength of the end faces of the slits can be further increased by the plurality of ribs.
  • the plurality of ribs include the first rib and the second rib adjacent to each other, and one end of the slit is located between the first rib and the second rib. May be good. In this case, even if the separator body is about to tear starting from one end of the slit, it becomes difficult to tear due to the thickness of the first rib or the second rib, and it is possible to prevent the slit from expanding to an undesired length.
  • the plurality of ribs include the third rib and the fourth rib adjacent to each other, and the other end of the slit is located between the third rib and the fourth rib. You may. In this case, even if the separator body is about to tear starting from the other end of the slit, it becomes difficult to tear due to the thickness of the third rib or the fourth rib, and it is possible to prevent the slit from expanding to an undesired length.
  • the width of the slit at the first position may be different from the width of the slit at the second position. This makes it easier to secure a flow path for the electrolytic solution even when a convex portion having a certain width is located at a position overlapping the slit.
  • the electrode according to one aspect of the present invention includes a electrode plate housed in an electric tank and the battery separator. Since the electrode is also provided with the battery separator, it has the above-mentioned effect that it is possible to avoid obstruction of the flow of the electrolytic solution through the slit.
  • the lead-acid battery according to one aspect of the present invention includes a plurality of electrode plates arranged so that positive electrode plates and negative electrode plates are alternately laminated, and an electric tank for accommodating the electrode plates in an upright position.
  • the group has a plurality of the battery separators, and the separator body of the battery separator covers at least the lower end portion of either the positive electrode plate or the negative electrode plate. Since the lead-acid battery is also provided with the battery separator, it has the above-mentioned effect that it is possible to avoid obstruction of the flow of the electrolytic solution through the slit.
  • the assembled battery according to one aspect of the present invention includes the above-mentioned lead storage batteries. Since the lead-acid battery is also provided in this assembled battery, the above-mentioned effect that the flow of the electrolytic solution through the slit can be prevented from being obstructed can be obtained.
  • the electric vehicle according to one aspect of the present invention is provided with the lead-acid battery. Since the electric vehicle is also equipped with the lead-acid battery, the above-mentioned effect that the flow of the electrolytic solution through the slit can be avoided can be avoided. Play.
  • a battery separator an electrode, a lead storage battery, an assembled battery and an electric vehicle capable of avoiding obstruction of the flow of the electrolytic solution through the slit. ..
  • FIG. 1 is a diagram showing a forklift equipped with an assembled battery according to an embodiment.
  • FIG. 2 is a cross-sectional view schematically showing the lead storage battery according to the embodiment.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG.
  • FIG. 4 is a plan view showing the negative electrode according to the embodiment.
  • FIG. 5 is a front view showing a negative electrode and a battery separator according to the embodiment.
  • FIG. 6 is a cross-sectional view taken along the line BB of FIG.
  • FIG. 7 is an enlarged front view showing a part of FIG. 5.
  • FIG. 8 is a view of the battery separator of FIG. 5 as viewed from below.
  • FIG. 9 is a view of the battery separator according to the modified example as viewed from below.
  • 10A is a front view showing a negative electrode and a battery separator according to a modified example.
  • 10 (b) is an end view taken along the line CC of FIG. 10 (a).
  • FIG. 11 is a perspective view showing a separator main body according to a modified example.
  • FIG. 12 is a perspective view showing a separator main body according to a modified example.
  • FIG. 1 is a diagram showing a forklift 1 equipped with an assembled battery 200.
  • the forklift (electric vehicle) 1 is equipped with an assembled battery 200.
  • the forklift 1 is driven by the electric power supplied from the assembled battery 200.
  • the assembled battery 200 includes a plurality of lead storage batteries 100.
  • FIG. 2 is a cross-sectional view schematically showing the lead storage battery 100.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG.
  • the positive electrode 10 and the negative electrode 20 are alternately arranged via the battery separator 30 from the front side to the back side of the drawing.
  • a part of the positive electrode 10 is shown in cross section.
  • FIG. 3 shows a laminated structure of a positive electrode, a negative electrode 20, and a battery separator 30 when the lead storage battery 100 is viewed from above.
  • the terms "upper” and “lower” correspond to the upper and lower parts of the battery case 120 in the height direction (hereinafter, the same applies).
  • the Z direction corresponds to the height direction of the battery case 120
  • the X direction corresponds to the direction orthogonal to the Z direction
  • the Y direction corresponds to the direction orthogonal to the Z direction and orthogonal to the X direction.
  • the lead-acid battery 100 includes an electrode group (electrode plate group) 110, an electric tank 120 accommodating the electrode group 110, and a connecting member connected to the electrode group 110.
  • the 130a, 130b, the pole columns 140a, 140b connected to the connecting members 130a, 130b, the liquid spout 150 for closing the liquid injection port of the electric tank 120, and the support member 160 connected to the electric tank 120 were attached. Be prepared.
  • the electrode group 110 includes a plurality of positive electrodes 10, a plurality of negative electrodes 20, and a plurality of battery separators 30.
  • the positive electrode 10 and the negative electrode 20 are alternately arranged in the X direction via the battery separator 30.
  • the space around the positive electrode 10 between the battery separators 30 is filled with the electrolytic solution 40.
  • the positive electrode 10 constitutes a plate-shaped electrode plate.
  • the positive electrode 10 is housed upright in the electric tank 120.
  • the positive electrode 10 includes a plurality of tubular bodies 12a, a plurality of core metal (current collector) 14, a positive electrode material (electrode material) 16, a lower collective punishment (sealing member) 18, an upper collective punishment 12c, and an ear portion. It has 12d and.
  • a plurality of tubular bodies 12a are arranged side by side in a row adjacent to each other along the Y direction.
  • the plurality of tubular bodies 12a form a group of active material holding tubes (clad tubes).
  • the tubular body 12a extends in the Z direction.
  • the tubular body 12a is formed of a porous body.
  • the tubular body 12a may be formed of a base material such as a woven fabric or a non-woven fabric. As the material of the base material, a material having acid resistance can be used.
  • the core metal 14 is inserted into each tubular body 12a.
  • the core metal 14 has a rod shape.
  • the core metal 14 extends along the Z direction inside the tubular body 12a.
  • the core metal 14 can be obtained, for example, by casting.
  • the constituent material of the core metal 14 may be any conductive material, and examples thereof include lead alloys such as lead-calcium-tin alloys and lead-antimony-arsenic alloys.
  • the positive electrode material 16 is filled inside the tubular body 12a.
  • the positive electrode material 16 contains an active material.
  • the active material includes both the post-chemical active material and the raw material of the pre-chemical active material.
  • the positive electrode material 16 here contains the active material after chemical conversion.
  • the tubular electrode of the positive electrode 10 is electrically connected to the pole column 140a via the upper joint 12c, the selvage portion 12d, and the connecting member 130a.
  • the lower collective punishment 18 is attached to the lower end portion of the plurality of tubular bodies 12a.
  • the lower joint 18 seals the lower end portions of the plurality of tubular bodies 12a.
  • the lower joint 18 is fitted to the lower ends of the plurality of tubular bodies 12a.
  • the lower joint 18 may be fixed to the lower ends of the plurality of tubular bodies 12a by a thermosetting adhesive or the like.
  • a material having acid resistance can be used as the material of the lower collective punishment 18, a material having acid resistance can be used.
  • the material of the lower junction 18 include resins such as polyolefin (polypropylene, polyethylene, etc.), polyethylene terephthalate (PET), polystyrene (PS), polyvinylidene fluoride (PVDF), and polycarbonate (PC).
  • the upper collective punishment 12c is attached to the upper end of the tubular body 12a.
  • the upper collective punishment 12c seals the upper end portion of the tubular body 12a.
  • the upper collective punishment 12c is fixed to the upper end portion of the tubular body 12a by welding. Welding can be realized by heating, ultrasonic irradiation, laser irradiation and the like.
  • the upper continuous punishment 12c may be fixed to the upper end portions of the plurality of tubular bodies 12a by a thermosetting adhesive or the like.
  • the lower punishment 18 and the upper punishment 12c are in contact with the tubular body 12a and the core metal 14 and the positive electrode material 16 arranged in the tubular body 12a.
  • the lower punishment 18 and the upper punishment 12c hold a tubular body 12a, a core metal 14, and a positive electrode material 16.
  • One end of the selvage 12d is connected to the upper collective punishment 12c.
  • the other end of the selvage portion 12d is connected to the connecting member 130a.
  • FIG. 4 is a plan view showing the negative electrode 20.
  • the negative electrode 20 constitutes a plate-shaped electrode plate.
  • the negative electrode 20 is housed upright in the electric tank 120.
  • the negative electrode 20 is, for example, a paste type negative electrode plate.
  • the negative electrode 20 is electrically connected to the pole pillar 140b via the connecting member 130b.
  • the negative electrode 20 has a negative electrode grid 20a and an ear portion 20b.
  • the negative electrode grid 20a is the main body of the negative electrode 20 and holds the negative electrode material 20c.
  • the negative electrode material 20c may contain a post-chemical active material and an additive.
  • the active substance is, for example, spongy lead.
  • the additive include barium sulfate, a carbon material, and reinforcing short fibers.
  • the selvage portion 20b is a terminal portion that protrudes upward from the negative electrode lattice body 20a.
  • the negative electrode grid 20a is covered with a battery separator 30 (see FIG. 3).
  • the negative electrode lattice body 20a is provided with foot portions 20d and 20e.
  • the foot portions 20d and 20e are convex portions provided so as to project downward (in a predetermined direction) from the negative electrode lattice body 20a.
  • the feet 20d and 20e are arranged at predetermined intervals.
  • the negative electrode 20 and the battery separator 30 constitute the electrode 3.
  • the battery separator 30 is a battery member for preventing a short circuit between the positive electrode 10 and the negative electrode 20.
  • the battery separator 30 electronically insulates between the positive electrode 10 and the negative electrode 20 while allowing ions to permeate, and has resistance to oxidizing property on the positive electrode 10 side and reducing property on the negative electrode 20 side. If there is, there is no particular limitation. Examples of the material (material) of such a battery separator 30 include glass fiber, resin, and an inorganic substance.
  • the battery separator 30 covers the negative electrode 20. The selvage portion 20b of the negative electrode 20 is exposed from the upper part of the battery separator 30.
  • the support member 160 is arranged on the bottom surface of the electric tank 120 and supports the positive electrode 10 and the negative electrode 20.
  • the support member 160 has a plurality of convex portions 160a protruding upward.
  • the convex portion 160a is a so-called kura, and is provided on the support member 160.
  • the convex portion 160a is provided on the bottom surface of the battery tank 120 (position above the bottom surface) separately from the battery tank 120.
  • the convex portion 160a extends in the X direction.
  • the convex portions 160a are arranged in the Y direction.
  • the convex portion 160a supports the positive electrode 10 and the negative electrode 20.
  • the convex portion 160a comes into contact with the battery separator 30 that covers the negative electrode 20.
  • the convex portions 160a and the foot portions 20d and 20e of the negative electrode 20 face each other, and the convex portions 160a and the foot portions 20d, The battery separator 30 comes into contact with the 20e and is sandwiched.
  • FIG. 5 is a front view showing the negative electrode 20 and the battery separator 30.
  • FIG. 6 is a cross-sectional view taken along the line BB of FIG.
  • FIG. 7 is an enlarged front view showing a part of FIG. 5.
  • FIG. 8 is a view of the battery separator 30 as viewed from below. In FIG. 7, the rib 36 is omitted for convenience.
  • the battery separator 30 includes a bag-shaped separator main body 31 that at least covers the lower end portion of the negative electrode 20.
  • the separator main body 31 has a pair of sheet portions 32, a pair of sealing portions 34, a joint portion 35, and a plurality of (plural rows of) ribs 36.
  • the separator main body 31 includes an inner surface 31a on the negative electrode 20 side and an outer surface 31b on the opposite side of the inner surface 31a.
  • the sheet portion 32 is a sheet-like portion and exhibits flexibility.
  • the sheet portion 32 is arranged on one side and the other side of the negative electrode 20 in the thickness direction (hereinafter, also simply referred to as “thickness direction”).
  • the lower ends of the seat portion 32 arranged on one side in the thickness direction and the seat portion 32 arranged on the other side in the thickness direction are integrally continuous via the folded-back portion 33.
  • the folded-back portion 33 is a sheet-shaped portion that is connected to the lower end portions of each of the pair of sheet portions 32 and is bent in a U-shape so as to be folded back from one side to the other side in the thickness direction, and exhibits flexibility.
  • the seal portion 34 is a portion that connects the pair of seat portions 32 and seals the space between the pair of seat portions 32.
  • the seal portions 34 are provided at both ends of the pair of sheet portions 32 in the width direction (horizontal direction in FIG. 5, hereinafter simply referred to as “width direction”) orthogonal to both the thickness direction and the vertical direction.
  • the seal portion 34 extends in the vertical direction from the upper end to the lower end in the pair of seat portions 32.
  • the seal portion 34 is, for example, an ultrasonic welding portion, a heat seal portion, a cold seal portion, a gear seal portion, or the like.
  • the gear seal portion is a portion that is mechanically bonded by pressurization using a gear.
  • the seal portion 34 does not have to be completely sealed. From the viewpoint of the fluidity of the electrolytic solution 40 in the battery separator 30, a region through which the electrolytic solution 40 can pass may be provided on at least one of the sealing portions 34.
  • the joint portion 35 is a portion for joining a pair of seat portions 32.
  • the joint portion 35 is provided at the upper end portion of the pair of seat portions 32.
  • the joint portion 35 is provided in the upper end portion of the pair of seat portions 32 in a region opposite to the selvage portion 20b side from the center in the width direction.
  • the joint portion 35 extends along the width direction.
  • the joint portion 35 is, for example, a portion where the sheet portion 32 itself is welded. From the viewpoint of preventing poor welding, the joint portion 35 may be formed by ultrasonic welding or the like.
  • the rib 36 is provided, for example, for improving the durability of the separator main body 31 and improving the fluidity of the electrolytic solution 40 in the electric tank 120.
  • a plurality of ribs 36 are provided on the outer surface 31b of the separator main body 31.
  • Each of the plurality of ribs 36 has a rib 36 that continuously extends in the vertical direction from the upper end to the lower end on the outer surface of one seat portion 32, and a rib 36 that continuously extends in the vertical direction from the upper end to the lower end on the outer surface of the other seat portion 32.
  • the plurality of ribs 36 project from the outer surface of the seat portion 32 and the outer surface of the folded portion 33.
  • the plurality of ribs 36 are separated from each other in the width direction.
  • the plurality of ribs 36 extend parallel to each other.
  • the cross section of the rib 36 orthogonal to the extending direction of the rib 36 exhibits a rectangular shape, but is not limited thereto.
  • the cross section of the rib 36 may be, for example, trapezoidal or inverted trapezoidal.
  • a slit 37 is formed in the folded-back portion 33 (the portion covering the end portion of the separator main body 31).
  • the slit 37 is an opening portion that penetrates the inside and outside of the separator main body 31.
  • the slit 37 constitutes a non-joined portion that is not joined at the lower ends of the pair of sheet portions 32.
  • the slit 37 is a long opening portion extending so as to pass at least a position deviated from the center in the thickness direction of the folded portion 33.
  • the method for forming the slit 37 is not particularly limited, but the slit 37 may be formed by cutting with a cutter, for example.
  • the slit 37 extends so as not to reach the ridge line R1 at the folded portion 33 when viewed from below.
  • the ridge line R1 is a line consisting of a series of the lowermost portions of the folded-back portion 33.
  • the ridge line R1 here is a center line.
  • the center line is a line passing through the center in the thickness direction of the folded portion 33.
  • the center line is a line that passes through the center in the width direction and the thickness direction and along the width direction when the folded-back portion 33 is viewed from below.
  • the slit 37 here extends along the width direction when viewed from below.
  • a plurality of slits 37 are formed in the folded-back portion 33, and the plurality of slits 37 have the same length.
  • the length of the slit 37 is a dimension in the extending direction of the slit 37.
  • the slit 37 divides a plurality of ribs 36.
  • the end surface of the rib 36 exposed through the slit 37 and the end surface of the sheet portion 32 are connected so as to be located on the same surface as the end surface of the slit 37.
  • the plurality of ribs 36 include a first rib 361 and a second rib 362 adjacent to each other, and a third rib 363 and a fourth rib 364 adjacent to each other.
  • One end of the slit 37 is located between the first rib 361 and the second rib 362.
  • the other end of the slit is located between the third rib 363 and the fourth rib 364.
  • the width of the slit 37 at the first position is different from the width of the slit 37 at the second position (for example, the position between one end and the center).
  • the width of the slit 37 is a dimension in a direction orthogonal to the extending direction in the slit 37.
  • the slit 37 is formed at a position separated from the foot portions 20d and 20e in the width direction.
  • the slits 37 are formed on one side and the other side of the foot portion 20e in the width direction, respectively.
  • the center of the slit 37 is located between a pair of adjacent convex portions 160a.
  • the length of the slit 37 is larger than the width of the convex portion 160a.
  • the length of the slit 37 is smaller than the distance between the pair of adjacent protrusions 160a.
  • the method for manufacturing the lead-acid battery 100 includes at least an assembly step of assembling each component to obtain the lead-acid battery 100.
  • the unchemical positive electrode 10 and the negative electrode 20 covered with the unchemical battery separator 30 are laminated, and the current collecting portions of electrodes having the same polarity are welded with a strap to form the electrode group 110.
  • the electrode group 110 is inserted into the electric tank 120 and arranged to produce an unchemical battery.
  • Dilute sulfuric acid is put into a non-chemical battery and a direct current is applied to form an electric tank.
  • the lead storage battery 100 is obtained by adjusting the specific gravity of sulfuric acid after chemical conversion to an appropriate specific density.
  • the chemical conversion treatment is not limited to being carried out after the assembly step, and may be carried out before the assembly step (tank chemical conversion).
  • a slit 37 is formed in the folded portion 33 of the separator main body 31.
  • the battery case 120 has a plurality of convex portions 160a that support the negative electrode 20. In the width direction, the center of the slit 37 is located between a pair of adjacent convex portions 160a. In this case, it is possible to prevent the slit 37 from being completely closed by the convex portion 160a. Therefore, it is possible to avoid obstructing the flow of the electrolytic solution 40 through the slit 37.
  • the length of the slit 37 in the width direction is larger than the width of the convex portion 160a. In this case, even when the convex portion 160a is located at a position overlapping a part of the slit 37, the electrolytic solution 40 can be circulated through the other portion of the slit 37.
  • the length of the slit 37 in the width direction is smaller than the distance between the pair of adjacent convex portions 160a.
  • the slit 37 is likely to exist at a position that does not overlap with the convex portion 160a, and it is easy to secure a distribution path for the electrolytic solution 40 through the slit 37.
  • the slit 37 is formed in the folded portion 33. In this case, it is possible to avoid obstructing the flow of the electrolytic solution 40 through the slit 37 formed in the folded portion 33.
  • a plurality of slits 37 are formed in the folded-back portion 33. In this case, even if a part of the slit 37 is blocked by the convex portion 160a in the folded portion 33, the distribution path of the electrolytic solution 40 can be easily secured in the other slit 37.
  • the plurality of slits 37 have the same length. In this case, it becomes easy to control the flow amount of the electrolytic solution 40 through the slit 37 to be constant. Since the slits 37 may be formed with the same length, the manufacturing efficiency can be improved.
  • the slit 37 divides the rib 36.
  • the strength of the end surface of the slit 37 can be increased by the rib 36.
  • the end face of the slit 37 is less likely to be damaged.
  • the slit 37 divides a plurality of ribs 36.
  • the plurality of ribs 36 are located at the positions of the end faces of the slits 37, the strength of the end faces of the slits 37 can be further increased by the plurality of ribs 36.
  • the end face of the slit 37 is less likely to be damaged.
  • the plurality of ribs 36 include a first rib 361 and a second rib 362 adjacent to each other.
  • One end of the slit 37 is located between the first rib 361 and the second rib 362.
  • the slit 37 expands to an undesired length. It can be suppressed.
  • the rib 36 is not positioned at the cutting start position (the position where the cutter blade enters), so that defects such as the cutter blade being caught by the rib 36 are unlikely to occur.
  • the plurality of ribs 36 include a third rib 363 and a fourth rib 364 adjacent to each other.
  • the other end of the slit 37 is located between the third rib 363 and the fourth rib 364.
  • the slit 37 expands to an undesired length. Can be suppressed.
  • the rib 36 is not positioned at the cutting end position (the position where the cutter blade is separated), so that defects such as the cutter blade being caught by the rib 36 are unlikely to occur.
  • the width of the slit 37 at the first position is different from the width of the slit 37 at the second position.
  • the convex portion 160a having a certain width is located at the position overlapping with the slit 37, the distribution path of the electrolytic solution 40 can be easily secured.
  • the rib 36 extends linearly, but the rib 36 is not limited to this.
  • the rib 36 may extend in a wavy shape or may extend in a zigzag shape.
  • the rib 36 may be formed intermittently, may have a point shape (dot shape), may have a circular shape, may have an elliptical shape, or may have a polygonal shape.
  • the rib 36 may have a polygonal pyramid shape, a polygonal pyramid shape, a conical shape, or a truncated cone shape.
  • the cross section of the rib 36 may be semicircular or polygonal.
  • the rib 36 may extend along the vertical direction, or may extend in lieu of or in addition to the rib 36 along the width direction.
  • the slit 37 divides the plurality of ribs 36, but at least one rib 36 may be divided.
  • the width of the slit 37 at the first position is different from the width of the slit 37 at the second position, but these may be the same.
  • the first position and the second position are not particularly limited, and may be any position as long as they are different from each other in the slit 37.
  • the ridge line R1 is also the center line of the folded portion 33, but the ridge line R1 does not have to be the center line.
  • two slits 37 are formed, but three or more slits 37 may be formed.
  • the lengths of all the slits 37 are the same, but when three or more slits 37 are formed, the lengths of some of them may be the same.
  • some or all of the plurality of slits 37 may have different lengths. In this case, it becomes easy to determine the orientation of the battery separator 30 at the time of manufacturing.
  • FIG. 9 is a view of the battery separator 530 according to the modified example as viewed from below.
  • the folded portion 33 is inclined with respect to the center line and / or the ridge line R1 passing through the center in the thickness direction of the folded portion 33 in place of or in addition to the slit 37 (see FIG. 8).
  • a slit 337 extending in the direction of the ridge may be formed. In this case, even when the convex portion 160a is located at a position overlapping the center line and / or the ridge line R1, the slit 337 is not completely closed and the distribution path of the electrolytic solution 40 is easily secured.
  • slits 337 are formed in addition to the slits 37, they are formed at positions asymmetric with respect to the center line of the folded portion 33. In this case, it becomes easy to determine the orientation of the battery separator 30 at the time of manufacturing.
  • the slit 37 may also extend in a direction inclined with respect to the center line and / or the ridge line R1 passing through the center in the thickness direction of the folded portion 33.
  • the separator main body 31 includes the folded-back portion 33, but is not limited to this, and may be configured to cover at least the end portion of the negative electrode 20.
  • the separator main body 31 is arranged at the lower end portions of each of the pair of sheet portions 32 (one side and the other side in the thickness direction of the negative electrode 20). It may have a welded portion 431 for welding (each lower end portion of the sheet portion 32).
  • a slit 437 similar to the slit 37 may be formed by a portion other than the welded portion 431 at the lower end portion of the sheet portion 32.
  • the rib 36 is omitted for convenience.
  • the separator main body 31 has a configuration in which both ends of the pair of sheet portions 32 in the width direction are integrally continuous via the folded-back portion 533 (that is, a cylindrical shape whose axial direction is the vertical direction).
  • the configuration of may be used.
  • the separator main body 31 may have a configuration in which one end or the other end of the pair of sheet portions 32 in the width direction is integrally continuous via the folded-back portion 633.
  • one end and the other end in the width direction continuous in the folded portion 633 may be alternately alternated in the laminated direction, whereby the separator main body may be alternated.
  • a configuration in which 31 is folded in a bellows shape is realized.
  • a slit similar to the slit 37 may be formed in the folded portion 533, 633.
  • the rib 36 is omitted for convenience.
  • the convex portion 160a is provided on the bottom surface of the electric tank 120 separately from the electric tank 120, but the convex portion 160a may be provided integrally with the electric tank 120.
  • the forklift 1 has been described as an example of the electric vehicle (electric vehicle), but the electric vehicle may be, for example, a golf cart or the like. Further, although the embodiment in which the assembled battery 200 is mounted on the forklift 1 has been described as an example, the lead storage battery 100 may be mounted on the forklift 1.
  • each configuration in the above-described embodiments and modifications can be arbitrarily applied to each configuration in another embodiment or modification.
  • a part of each configuration in the above-described embodiment or modification can be appropriately omitted without departing from the gist of one aspect of the present invention.

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Abstract

This separator for batteries is provided with a separator main body that covers at least a lower end of a negative electrode that is contained in a battery case so as to stand in the upright position. The battery case has a plurality of projected parts which are provided on the bottom surface of the battery case in an integrated manner or separately so as to support an electrode plate. A portion of the separator main body, said portion covering the lower end, is provided with a slit. The center of the slit is positioned between a pair of projected parts that are adjacent to each other.

Description

電池用セパレータ、電極、鉛蓄電池、組電池及び電気車Battery separators, electrodes, lead-acid batteries, assembled batteries and electric vehicles
　本発明は、電池用セパレータ、電極、鉛蓄電池、組電池及び電気車に関する。 The present invention relates to a battery separator, an electrode, a lead storage battery, an assembled battery, and an electric vehicle.
　鉛蓄電池は、産業用又は民生用の二次電池として広く用いられており、特に、電気車用鉛蓄電池（いわゆるバッテリー）、又は、ＵＰＳ（Ｕｎｉｎｔｅｒｒｕｐｔｉｂｌｅ　Ｐｏｗｅｒ　Ｓｕｐｐｌｙ）、防災（非常）無線、電話等のバックアップ用鉛蓄電池の需要が多い。 Lead-acid batteries are widely used as secondary batteries for industrial or consumer use, and in particular, lead-acid batteries for electric vehicles (so-called batteries), UPS (Uninterruptible Power Supply), disaster prevention (emergency) radios, telephones, etc. There is a lot of demand for lead-acid batteries for backup.
　例えば特許文献１には、正極板と負極板とが交互に積層するように複数配置された極板群と、極板群を収容する電槽と、を備えた鉛蓄電池が開示されている。このような鉛蓄電池では、極板群は、複数の電池用セパレータを有し、電池用セパレータのセパレータ本体は、正極板及び負極板の何れかにおける下端部を少なくとも覆う。電槽は、当該電槽の底面上に設けられた複数の凸部（くら等）により、極板群を支持する。 For example, Patent Document 1 discloses a lead-acid battery including a plurality of electrode plates arranged so that positive electrode plates and negative electrode plates are alternately laminated, and an electric tank for accommodating the electrode plates. In such a lead-acid battery, the electrode plate group has a plurality of battery separators, and the separator body of the battery separator covers at least the lower end portion of either the positive electrode plate or the negative electrode plate. The electric tank supports the electrode plate group by a plurality of convex portions (kura, etc.) provided on the bottom surface of the electric tank.
特開２０１２－０７９６０９号公報Japanese Unexamined Patent Publication No. 2012-07609
　上述したような電池用セパレータでは、セパレータ本体の端部を覆う部分にスリットが形成されており、このスリットを通じて、電槽内の電解液を流通することが図られている。しかし、場合によっては、電槽の底面上の凸部でスリットが塞がれてしまい、電解液の当該流通が阻まれる可能性がある。 In the battery separator as described above, a slit is formed in a portion covering the end portion of the separator main body, and the electrolytic solution in the electric tank can be circulated through this slit. However, in some cases, the slit may be blocked by the convex portion on the bottom surface of the battery case, which may hinder the flow of the electrolytic solution.
　そこで、本発明の一側面は、スリットを介した電解液の流通が阻まれるのを回避することが可能な電池用セパレータ、電極、鉛蓄電池、組電池及び電気車を提供することを目的とする。 Therefore, one aspect of the present invention is to provide a battery separator, an electrode, a lead storage battery, an assembled battery, and an electric vehicle capable of avoiding obstruction of the flow of the electrolytic solution through the slit. ..
　本発明の一側面に係る電池用セパレータは、電槽に立てて収容される極板の下端部を少なくとも覆うセパレータ本体を備え、電槽は、当該電槽の底面上に一体又は別体で設けられ極板を支持する複数の凸部を有し、セパレータ本体の下端部を覆う部分には、スリットが形成され、スリットの中心は、隣接する一対の凸部の間に位置する。 The battery separator according to one aspect of the present invention includes a separator main body that covers at least the lower end of a plate housed upright in an electric tank, and the electric tank is provided integrally or separately on the bottom surface of the electric tank. It has a plurality of convex portions that support the electrode plate, and a slit is formed in a portion that covers the lower end portion of the separator main body, and the center of the slit is located between a pair of adjacent convex portions.
　この電池用セパレータでは、スリットが凸部によって完全に塞がれることを抑制することができる。よって、スリットを介した電解液の流通が妨げられることを回避することが可能となる。 With this battery separator, it is possible to prevent the slit from being completely blocked by the convex portion. Therefore, it is possible to avoid obstructing the flow of the electrolytic solution through the slit.
　本発明の一側面に係る電池用セパレータでは、極板の厚さ方向と直交する水平方向において、スリットの長さは、凸部の幅よりも大きくてもよい。この場合、スリットの一部分と重なる位置に凸部が位置する場合でも、スリットの他部分を介して電解液を流通させることが可能となる。 In the battery separator according to one aspect of the present invention, the length of the slit may be larger than the width of the convex portion in the horizontal direction orthogonal to the thickness direction of the electrode plate. In this case, even if the convex portion is located at a position overlapping a part of the slit, the electrolytic solution can be circulated through the other part of the slit.
　本発明の一側面に係る電池用セパレータでは、極板の厚さ方向と直交する水平方向において、スリットの長さは、隣接する一対の凸部の間隔よりも小さくてもよい。この場合、凸部と重ならない位置にスリットが存在しやすくなり、スリットを介した電解液の流通経路が確保しやすくなる。 In the battery separator according to one aspect of the present invention, the length of the slit may be smaller than the distance between the pair of adjacent convex portions in the horizontal direction orthogonal to the thickness direction of the electrode plate. In this case, the slit is likely to exist at a position that does not overlap with the convex portion, and it is easy to secure the flow path of the electrolytic solution through the slit.
　本発明の一側面に係る電池用セパレータでは、セパレータ本体は、極板の厚さ方向の一方側から他方側に折り返すように屈曲する折返し部を有し、スリットは、折返し部に形成されていてもよい。この場合、折返し部に形成されたスリットを介した電解液の流通が妨げられることを回避できる。 In the battery separator according to one aspect of the present invention, the separator main body has a folded portion that bends so as to be folded back from one side in the thickness direction of the electrode plate to the other side, and the slit is formed in the folded portion. May be good. In this case, it is possible to avoid obstructing the flow of the electrolytic solution through the slit formed in the folded portion.
　本発明の一側面に係る電池用セパレータでは、スリットは、折返し部に複数形成されていてもよい。この場合、折返し部において一部のスリットが他部位によって塞がれても、他のスリットで電解液の流通経路が確保されやすくなる。 In the battery separator according to one aspect of the present invention, a plurality of slits may be formed in the folded portion. In this case, even if a part of the slits is blocked by another part in the folded portion, it becomes easy to secure the flow path of the electrolytic solution in the other slits.
　本発明の一側面に係る電池用セパレータでは、複数のスリットのうちの一部又は全部は、長さが等しくてもよい。この場合、スリットを介した電解液の流通量を一定に制御しやすくなる。 In the battery separator according to one aspect of the present invention, some or all of the plurality of slits may have the same length. In this case, it becomes easy to control the flow amount of the electrolytic solution through the slit to be constant.
　本発明の一側面に係る電池用セパレータでは、複数のスリットのうちの一部又は全部は、長さが異なっていてもよい。この場合、製造時に電池用セパレータの向きが判別しやすくなる。 In the battery separator according to one aspect of the present invention, some or all of the plurality of slits may have different lengths. In this case, it becomes easy to determine the orientation of the battery separator at the time of manufacturing.
　本発明の一側面に係る電池用セパレータでは、複数のスリットは、折返し部における極板の厚さ方向の中心を通る中心線に対して非対称の位置に形成されていてもよい。この場合、製造時に電池用セパレータの向きが判別しやすくなる。 In the battery separator according to one aspect of the present invention, the plurality of slits may be formed at positions asymmetric with respect to the center line passing through the center in the thickness direction of the electrode plate at the folded portion. In this case, it becomes easy to determine the orientation of the battery separator at the time of manufacturing.
　本発明の一側面に係る電池用セパレータでは、セパレータ本体は、極板側の内面と、内面の反対側の外面と、を有し、内面及び外面の少なくとも何れかには、複数のリブが設けられ、スリットは、少なくとも１つのリブを分断してもよい。この場合、スリットの端面の位置にリブが位置するため、当該リブによりスリットの端面の強度を高めることができる。 In the battery separator according to one aspect of the present invention, the separator main body has an inner surface on the electrode plate side and an outer surface on the opposite side of the inner surface, and a plurality of ribs are provided on at least one of the inner surface and the outer surface. The slit may divide at least one rib. In this case, since the rib is located at the position of the end face of the slit, the strength of the end face of the slit can be increased by the rib.
　本発明の一側面に係る電池用セパレータでは、スリットは、複数のリブを分断してもよい。この場合、スリットの端面の位置に複数のリブが位置するため、複数の当該リブによりスリットの端面の強度を一層高めることができる。 In the battery separator according to one aspect of the present invention, the slit may divide a plurality of ribs. In this case, since the plurality of ribs are located at the positions of the end faces of the slits, the strength of the end faces of the slits can be further increased by the plurality of ribs.
　本発明の一側面に係る電池用セパレータでは、複数のリブは、互いに隣接する第１リブ及び第２リブを含み、スリットの一端は、第１リブと第２リブとの間に位置していてもよい。この場合、スリットの一端を起点にセパレータ本体が裂けそうになったとしても、第１リブ又は第２リブの厚みによって裂け難くなり、望まない長さまでスリットが広がってしまうことを抑制できる。 In the battery separator according to one aspect of the present invention, the plurality of ribs include the first rib and the second rib adjacent to each other, and one end of the slit is located between the first rib and the second rib. May be good. In this case, even if the separator body is about to tear starting from one end of the slit, it becomes difficult to tear due to the thickness of the first rib or the second rib, and it is possible to prevent the slit from expanding to an undesired length.
　本発明の一側面に係る電池用セパレータでは、複数のリブは、互いに隣接する第３リブ及び第４リブを含み、スリットの他端は、第３リブと第４リブとの間に位置していてもよい。この場合、スリットの他端を起点にセパレータ本体が裂けそうになったとしても、第３リブ又は第４リブの厚みによって裂け難くなり、望まない長さまでスリットが広がってしまうことを抑制できる。 In the battery separator according to one aspect of the present invention, the plurality of ribs include the third rib and the fourth rib adjacent to each other, and the other end of the slit is located between the third rib and the fourth rib. You may. In this case, even if the separator body is about to tear starting from the other end of the slit, it becomes difficult to tear due to the thickness of the third rib or the fourth rib, and it is possible to prevent the slit from expanding to an undesired length.
　本発明の一側面に係る電池用セパレータでは、スリットの第１位置における幅は、当該スリットの第２位置における幅と異なっていてもよい。これにより、スリットと重なる位置に一定の幅を持つ凸部が位置するような場合でも、電解液の流通経路が確保されやすくなる。 In the battery separator according to one aspect of the present invention, the width of the slit at the first position may be different from the width of the slit at the second position. This makes it easier to secure a flow path for the electrolytic solution even when a convex portion having a certain width is located at a position overlapping the slit.
　本発明の一側面に係る電極は、電槽に収容される極板と、上記電池用セパレータと、を備える。この電極においても、上記電池用セパレータを備えることから、スリットを介した電解液の流通が妨げられることを回避できるという上記効果を奏する。 The electrode according to one aspect of the present invention includes a electrode plate housed in an electric tank and the battery separator. Since the electrode is also provided with the battery separator, it has the above-mentioned effect that it is possible to avoid obstruction of the flow of the electrolytic solution through the slit.
　本発明の一側面に係る鉛蓄電池は、正極板と負極板とが交互に積層するように複数配置された極板群と、極板群を立てて収容する電槽と、を備え、極板群は、上記電池用セパレータを複数有し、電池用セパレータのセパレータ本体は、正極板及び負極板の何れかにおける下端部を少なくとも覆う。この鉛蓄電池においても、上記電池用セパレータを備えることから、スリットを介した電解液の流通が妨げられることを回避できるという上記効果を奏する。 The lead-acid battery according to one aspect of the present invention includes a plurality of electrode plates arranged so that positive electrode plates and negative electrode plates are alternately laminated, and an electric tank for accommodating the electrode plates in an upright position. The group has a plurality of the battery separators, and the separator body of the battery separator covers at least the lower end portion of either the positive electrode plate or the negative electrode plate. Since the lead-acid battery is also provided with the battery separator, it has the above-mentioned effect that it is possible to avoid obstruction of the flow of the electrolytic solution through the slit.
　本発明の一側面に係る組電池は、上記鉛蓄電池を複数備える。この組電池においても、上記鉛蓄電池を備えることから、スリットを介した電解液の流通が妨げられることを回避できるという上記効果を奏する。 The assembled battery according to one aspect of the present invention includes the above-mentioned lead storage batteries. Since the lead-acid battery is also provided in this assembled battery, the above-mentioned effect that the flow of the electrolytic solution through the slit can be prevented from being obstructed can be obtained.
　本発明の一側面に係る電気車は、上記鉛蓄電池を備える、この電気車においても、上記鉛蓄電池を備えることから、スリットを介した電解液の流通が妨げられることを回避できるという上記効果を奏する。 The electric vehicle according to one aspect of the present invention is provided with the lead-acid battery. Since the electric vehicle is also equipped with the lead-acid battery, the above-mentioned effect that the flow of the electrolytic solution through the slit can be avoided can be avoided. Play.
　本発明の一側面によれば、スリットを介した電解液の流通が阻まれるのを回避することが可能な電池用セパレータ、電極、鉛蓄電池、組電池及び電気車を提供することが可能となる。 According to one aspect of the present invention, it is possible to provide a battery separator, an electrode, a lead storage battery, an assembled battery and an electric vehicle capable of avoiding obstruction of the flow of the electrolytic solution through the slit. ..
図１は、実施形態に係る組電池を搭載したフォークリフトを示す図である。FIG. 1 is a diagram showing a forklift equipped with an assembled battery according to an embodiment. 図２は、実施形態に係る鉛蓄電池を模式的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing the lead storage battery according to the embodiment. 図３は、図２のＡ－Ａ線に沿う断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 図４は、実施形態に係る負極を示す平面図である。FIG. 4 is a plan view showing the negative electrode according to the embodiment. 図５は、実施形態に係る負極及び電池用セパレータを示す正面図である。FIG. 5 is a front view showing a negative electrode and a battery separator according to the embodiment. 図６は、図５のＢ－Ｂ線に沿う断面図である。FIG. 6 is a cross-sectional view taken along the line BB of FIG. 図７は、図５の一部を拡大して示す正面図である。FIG. 7 is an enlarged front view showing a part of FIG. 5. 図８は、図５の電池用セパレータを下方から見た図である。FIG. 8 is a view of the battery separator of FIG. 5 as viewed from below. 図９は、変形例に係る電池用セパレータを下方から見た図である。FIG. 9 is a view of the battery separator according to the modified example as viewed from below. 図１０（ａ）は、変形例に係る負極及び電池用セパレータを示す正面図である。図１０（ｂ）は、図１０（ａ）のＣーＣ線に沿う端面図である。FIG. 10A is a front view showing a negative electrode and a battery separator according to a modified example. 10 (b) is an end view taken along the line CC of FIG. 10 (a). 図１１は、変形例に係るセパレータ本体を示す斜視図である。FIG. 11 is a perspective view showing a separator main body according to a modified example. 図１２は、変形例に係るセパレータ本体を示す斜視図である。FIG. 12 is a perspective view showing a separator main body according to a modified example.
　以下、本発明の実施形態について、図面を参照して詳細に説明する。図面において、同一又は相当の要素には同じ符号を付し、重複する説明を省略する。各図における構成要素の大きさは概念的なものであり、構成要素間の大きさの相対的な関係は各図に示されたものに限定されない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description is omitted. The sizes of the components in each figure are conceptual, and the relative size relationships between the components are not limited to those shown in each figure.
　図１は、組電池２００を搭載したフォークリフト１を示す図である。図１に示されるように、フォークリフト（電気車）１は、組電池２００を搭載している。フォークリフト１は、組電池２００から供給される電力によって駆動される。組電池２００は、複数の鉛蓄電池１００を備えて構成される。 FIG. 1 is a diagram showing a forklift 1 equipped with an assembled battery 200. As shown in FIG. 1, the forklift (electric vehicle) 1 is equipped with an assembled battery 200. The forklift 1 is driven by the electric power supplied from the assembled battery 200. The assembled battery 200 includes a plurality of lead storage batteries 100.
　図２は、鉛蓄電池１００を模式的に示す断面図である。図３は、図１のＡ－Ａ線に沿う断面図である。図２では、図面の手前側から奥側にかけて、電池用セパレータ３０を介して正極１０及び負極２０が交互に配置されている。図２では、正極１０の一部を断面化して示している。図３は、鉛蓄電池１００を上方から見た際の正極、負極２０及び電池用セパレータ３０の積層構造を示している。なお、「上」及び「下」の語は、電槽１２０の高さ方向の上方及び下方に対応する（以下、同じ）。Ｚ方向は電槽１２０の高さ方向に対応し、Ｘ方向はＺ方向と直交する方向に対応し、Ｙ方向はＺ方向と直交し且つＸ方向と直交する方向に対応する。 FIG. 2 is a cross-sectional view schematically showing the lead storage battery 100. FIG. 3 is a cross-sectional view taken along the line AA of FIG. In FIG. 2, the positive electrode 10 and the negative electrode 20 are alternately arranged via the battery separator 30 from the front side to the back side of the drawing. In FIG. 2, a part of the positive electrode 10 is shown in cross section. FIG. 3 shows a laminated structure of a positive electrode, a negative electrode 20, and a battery separator 30 when the lead storage battery 100 is viewed from above. The terms "upper" and "lower" correspond to the upper and lower parts of the battery case 120 in the height direction (hereinafter, the same applies). The Z direction corresponds to the height direction of the battery case 120, the X direction corresponds to the direction orthogonal to the Z direction, and the Y direction corresponds to the direction orthogonal to the Z direction and orthogonal to the X direction.
　図２及び図３に示されるように、実施形態に係る鉛蓄電池１００は、電極群（極板群）１１０と、電極群１１０を収容する電槽１２０と、電極群１１０に接続された連結部材１３０ａ，１３０ｂと、連結部材１３０ａ，１３０ｂに接続された極柱１４０ａ，１４０ｂと、電槽１２０の注液口を閉塞する液口栓１５０と、電槽１２０に接続された支持部材１６０と、を備える。 As shown in FIGS. 2 and 3, the lead-acid battery 100 according to the embodiment includes an electrode group (electrode plate group) 110, an electric tank 120 accommodating the electrode group 110, and a connecting member connected to the electrode group 110. The 130a, 130b, the pole columns 140a, 140b connected to the connecting members 130a, 130b, the liquid spout 150 for closing the liquid injection port of the electric tank 120, and the support member 160 connected to the electric tank 120 were attached. Be prepared.
　電極群１１０は、複数の正極１０と、複数の負極２０と、複数の電池用セパレータ３０と、を備える。正極１０及び負極２０は、電池用セパレータ３０を介してＸ方向に交互に配置されている。電池用セパレータ３０間における正極１０の周囲の空間には、電解液４０が充填されている。 The electrode group 110 includes a plurality of positive electrodes 10, a plurality of negative electrodes 20, and a plurality of battery separators 30. The positive electrode 10 and the negative electrode 20 are alternately arranged in the X direction via the battery separator 30. The space around the positive electrode 10 between the battery separators 30 is filled with the electrolytic solution 40.
　正極１０は、板状の極板を構成する。正極１０は、電槽１２０に立てて収容される。正極１０は、複数の筒状体１２ａと、複数の芯金（集電体）１４と、正極材（電極材）１６と、下部連座（封止部材）１８と、上部連座１２ｃと、耳部１２ｄと、を有する。 The positive electrode 10 constitutes a plate-shaped electrode plate. The positive electrode 10 is housed upright in the electric tank 120. The positive electrode 10 includes a plurality of tubular bodies 12a, a plurality of core metal (current collector) 14, a positive electrode material (electrode material) 16, a lower collective punishment (sealing member) 18, an upper collective punishment 12c, and an ear portion. It has 12d and.
　複数の筒状体１２ａは、Ｙ方向に沿って、隣接して一列に並設されている。複数の筒状体１２ａは、活物質保持用チューブ（クラッドチューブ）群を構成する。筒状体１２ａは、Ｚ方向に延びている。筒状体１２ａは、多孔質体で形成されている。筒状体１２ａは、例えば、織布、不織布等の基材で形成されていてもよい。基材の材料としては、耐酸性を有する材料を用いることができる。 A plurality of tubular bodies 12a are arranged side by side in a row adjacent to each other along the Y direction. The plurality of tubular bodies 12a form a group of active material holding tubes (clad tubes). The tubular body 12a extends in the Z direction. The tubular body 12a is formed of a porous body. The tubular body 12a may be formed of a base material such as a woven fabric or a non-woven fabric. As the material of the base material, a material having acid resistance can be used.
　芯金１４は、各筒状体１２ａに挿入されている。芯金１４は、棒状を呈する。芯金１４は、筒状体１２ａの内部においてＺ方向に沿って延びている。芯金１４は、例えば、鋳造により得ることができる。芯金１４の構成材料としては、導電性材料であればよく、例えば、鉛－カルシウム－錫系合金、鉛－アンチモン－ヒ素系合金等の鉛合金が挙げられる。正極材１６は、筒状体１２ａの内部に充填されている。正極材１６は、活物質を含む。活物質には、化成後の活物質及び化成前の活物質の原料の双方が包含される。ここでの正極材１６は、化成後の活物質を含有している。正極１０の筒状電極は、上部連座１２ｃ、耳部１２ｄ及び連結部材１３０ａを介して極柱１４０ａに電気的に接続されている。 The core metal 14 is inserted into each tubular body 12a. The core metal 14 has a rod shape. The core metal 14 extends along the Z direction inside the tubular body 12a. The core metal 14 can be obtained, for example, by casting. The constituent material of the core metal 14 may be any conductive material, and examples thereof include lead alloys such as lead-calcium-tin alloys and lead-antimony-arsenic alloys. The positive electrode material 16 is filled inside the tubular body 12a. The positive electrode material 16 contains an active material. The active material includes both the post-chemical active material and the raw material of the pre-chemical active material. The positive electrode material 16 here contains the active material after chemical conversion. The tubular electrode of the positive electrode 10 is electrically connected to the pole column 140a via the upper joint 12c, the selvage portion 12d, and the connecting member 130a.
　下部連座１８は、複数の筒状体１２ａの下端部に取り付けられている。下部連座１８は、複数の筒状体１２ａの下端部を封止する。下部連座１８は、複数の筒状体１２ａの下端部に嵌合されている。なお、熱硬化性の接着剤等により、下部連座１８が複数の筒状体１２ａの下端部に固着されていてもよい。下部連座１８の材料としては、耐酸性を有する材料を用いることができる。下部連座１８の材料としては、ポリオレフィン（ポリプロピレン、ポリエチレン等）、ポリエチレンテレフタレート（ＰＥＴ）、ポリスチレン（ＰＳ）、ポリフッ化ビニリデン（ＰＶＤＦ）、ポリカーボネート（ＰＣ）等の樹脂が挙げられる。 The lower collective punishment 18 is attached to the lower end portion of the plurality of tubular bodies 12a. The lower joint 18 seals the lower end portions of the plurality of tubular bodies 12a. The lower joint 18 is fitted to the lower ends of the plurality of tubular bodies 12a. The lower joint 18 may be fixed to the lower ends of the plurality of tubular bodies 12a by a thermosetting adhesive or the like. As the material of the lower collective punishment 18, a material having acid resistance can be used. Examples of the material of the lower junction 18 include resins such as polyolefin (polypropylene, polyethylene, etc.), polyethylene terephthalate (PET), polystyrene (PS), polyvinylidene fluoride (PVDF), and polycarbonate (PC).
　上部連座１２ｃは、筒状体１２ａの上端部に取り付けられている。上部連座１２ｃは、筒状体１２ａの上端部を封止する。上部連座１２ｃは、溶着により筒状体１２ａの上端部に固着されている。溶着は、加熱、超音波照射、レーザー照射等により実現できる。なお、熱硬化性の接着剤等により、上部連座１２ｃが複数の筒状体１２ａの上端部に固着されていてもよい。 The upper collective punishment 12c is attached to the upper end of the tubular body 12a. The upper collective punishment 12c seals the upper end portion of the tubular body 12a. The upper collective punishment 12c is fixed to the upper end portion of the tubular body 12a by welding. Welding can be realized by heating, ultrasonic irradiation, laser irradiation and the like. The upper continuous punishment 12c may be fixed to the upper end portions of the plurality of tubular bodies 12a by a thermosetting adhesive or the like.
　下部連座１８及び上部連座１２ｃは、筒状体１２ａと、筒状体１２ａ内に配置された芯金１４及び正極材１６と、に接する。下部連座１８及び上部連座１２ｃは、筒状体１２ａと芯金１４と正極材１６とを保持する。耳部１２ｄの一端は、上部連座１２ｃに接続されている。耳部１２ｄの他端は、連結部材１３０ａに接続されている。 The lower punishment 18 and the upper punishment 12c are in contact with the tubular body 12a and the core metal 14 and the positive electrode material 16 arranged in the tubular body 12a. The lower punishment 18 and the upper punishment 12c hold a tubular body 12a, a core metal 14, and a positive electrode material 16. One end of the selvage 12d is connected to the upper collective punishment 12c. The other end of the selvage portion 12d is connected to the connecting member 130a.
　図４は、負極２０を示す平面図である。図４に示されるように、負極２０は、板状の極板を構成する。負極２０は、電槽１２０に立てて収容される。負極２０は、例えばペースト式負極板である。負極２０は、連結部材１３０ｂを介して極柱１４０ｂに電気的に接続されている。負極２０は、負極格子体２０ａと耳部２０ｂとを有する。負極格子体２０ａは、負極２０における本体部であり、負極材２０ｃを保持する。負極材２０ｃは、化成後の活物質と添加剤とを含み得る。活物質は、例えば、海綿状鉛等である。添加剤としては、硫酸バリウム、炭素材料、又は、補強用短繊維等が挙げられる。耳部２０ｂは、負極格子体２０ａから上方に突出する端子部である。負極格子体２０ａは、電池用セパレータ３０によって覆われている（図３参照）。負極格子体２０ａには、足部２０ｄ，２０ｅが設けられている。足部２０ｄ，２０ｅは、負極格子体２０ａから下方（所定方向）に突出するように設けられた凸部である。足部２０ｄ，２０ｅは、所定間隔をあけて配置されている。負極２０及び電池用セパレータ３０は、電極３を構成する。 FIG. 4 is a plan view showing the negative electrode 20. As shown in FIG. 4, the negative electrode 20 constitutes a plate-shaped electrode plate. The negative electrode 20 is housed upright in the electric tank 120. The negative electrode 20 is, for example, a paste type negative electrode plate. The negative electrode 20 is electrically connected to the pole pillar 140b via the connecting member 130b. The negative electrode 20 has a negative electrode grid 20a and an ear portion 20b. The negative electrode grid 20a is the main body of the negative electrode 20 and holds the negative electrode material 20c. The negative electrode material 20c may contain a post-chemical active material and an additive. The active substance is, for example, spongy lead. Examples of the additive include barium sulfate, a carbon material, and reinforcing short fibers. The selvage portion 20b is a terminal portion that protrudes upward from the negative electrode lattice body 20a. The negative electrode grid 20a is covered with a battery separator 30 (see FIG. 3). The negative electrode lattice body 20a is provided with foot portions 20d and 20e. The foot portions 20d and 20e are convex portions provided so as to project downward (in a predetermined direction) from the negative electrode lattice body 20a. The feet 20d and 20e are arranged at predetermined intervals. The negative electrode 20 and the battery separator 30 constitute the electrode 3.
　図２及び図３に示されるように、電池用セパレータ３０は、正極１０と負極２０との短絡を防止するための電池用部材である。電池用セパレータ３０としては、正極１０と負極２０との間を電子的には絶縁する一方でイオンを透過させ、且つ、正極１０側における酸化性及び負極２０側における還元性に対する耐性を備えるものであれば、特に制限されない。このような電池用セパレータ３０の材料（材質）としては、ガラス繊維、樹脂、無機物等が挙げられる。電池用セパレータ３０は、負極２０を覆う。負極２０の耳部２０ｂは、電池用セパレータ３０の上部から露出している。 As shown in FIGS. 2 and 3, the battery separator 30 is a battery member for preventing a short circuit between the positive electrode 10 and the negative electrode 20. The battery separator 30 electronically insulates between the positive electrode 10 and the negative electrode 20 while allowing ions to permeate, and has resistance to oxidizing property on the positive electrode 10 side and reducing property on the negative electrode 20 side. If there is, there is no particular limitation. Examples of the material (material) of such a battery separator 30 include glass fiber, resin, and an inorganic substance. The battery separator 30 covers the negative electrode 20. The selvage portion 20b of the negative electrode 20 is exposed from the upper part of the battery separator 30.
　支持部材１６０は、電槽１２０の底面に配置され、正極１０及び負極２０を支持する。支持部材１６０は、上方に突出する複数の凸部１６０ａを有する。凸部１６０ａは、所謂くらであり、支持部材１６０に設けられている。換言すると、凸部１６０ａは、電槽１２０の底面上（底面よりも上方の位置）に電槽１２０とは別体で設けられている。凸部１６０ａは、Ｘ方向に延びる。凸部１６０ａは、Ｙ方向に並ぶ。凸部１６０ａは、正極１０及び負極２０を支持する。凸部１６０ａは、負極２０を覆う電池用セパレータ３０に当接する。具体的には、電池用セパレータ３０に覆われた負極２０が電槽１２０に収容された場合、凸部１６０ａと負極２０の足部２０ｄ，２０ｅとが対向し、凸部１６０ａと足部２０ｄ，２０ｅとに電池用セパレータ３０が当接して挟まれる。 The support member 160 is arranged on the bottom surface of the electric tank 120 and supports the positive electrode 10 and the negative electrode 20. The support member 160 has a plurality of convex portions 160a protruding upward. The convex portion 160a is a so-called kura, and is provided on the support member 160. In other words, the convex portion 160a is provided on the bottom surface of the battery tank 120 (position above the bottom surface) separately from the battery tank 120. The convex portion 160a extends in the X direction. The convex portions 160a are arranged in the Y direction. The convex portion 160a supports the positive electrode 10 and the negative electrode 20. The convex portion 160a comes into contact with the battery separator 30 that covers the negative electrode 20. Specifically, when the negative electrode 20 covered with the battery separator 30 is housed in the battery case 120, the convex portions 160a and the foot portions 20d and 20e of the negative electrode 20 face each other, and the convex portions 160a and the foot portions 20d, The battery separator 30 comes into contact with the 20e and is sandwiched.
　次に、電池用セパレータ３０について詳説する。 Next, the battery separator 30 will be described in detail.
　図５は、負極２０及び電池用セパレータ３０を示す正面図である。図６は、図５のＢ－Ｂ線に沿う断面図である。図７は、図５の一部を拡大して示す正面図である。図８は、電池用セパレータ３０を下方から見た図である。図７では、便宜上、リブ３６を省略して示す。図５～図８の何れかに示されるように、電池用セパレータ３０は、負極２０の下端部を少なくとも覆う袋状のセパレータ本体３１を備える。セパレータ本体３１は、一対のシート部３２、一対のシール部３４、接合部３５及び複数（複数列）のリブ３６を有する。セパレータ本体３１は、負極２０側の内面３１ａと、内面３１ａの反対側の外面３１ｂと、を含む。 FIG. 5 is a front view showing the negative electrode 20 and the battery separator 30. FIG. 6 is a cross-sectional view taken along the line BB of FIG. FIG. 7 is an enlarged front view showing a part of FIG. 5. FIG. 8 is a view of the battery separator 30 as viewed from below. In FIG. 7, the rib 36 is omitted for convenience. As shown in any of FIGS. 5 to 8, the battery separator 30 includes a bag-shaped separator main body 31 that at least covers the lower end portion of the negative electrode 20. The separator main body 31 has a pair of sheet portions 32, a pair of sealing portions 34, a joint portion 35, and a plurality of (plural rows of) ribs 36. The separator main body 31 includes an inner surface 31a on the negative electrode 20 side and an outer surface 31b on the opposite side of the inner surface 31a.
　シート部３２は、シート状部分であり、可撓性を示す。シート部３２は、負極２０の厚さ方向（以下、単に「厚さ方向」ともいう）の一方側及び他方側のそれぞれに配置されている。厚さ方向の一方側に配置されたシート部３２と厚さ方向の他方側に配置されたシート部３２とは、その下端が折返し部３３を介して一体的に連続する。折返し部３３は、一対のシート部３２それぞれの下端部に連なり、厚さ方向の一方側から他方側に折り返すようにＵ字状に屈曲するシート状部分であり、可撓性を示す。 The sheet portion 32 is a sheet-like portion and exhibits flexibility. The sheet portion 32 is arranged on one side and the other side of the negative electrode 20 in the thickness direction (hereinafter, also simply referred to as “thickness direction”). The lower ends of the seat portion 32 arranged on one side in the thickness direction and the seat portion 32 arranged on the other side in the thickness direction are integrally continuous via the folded-back portion 33. The folded-back portion 33 is a sheet-shaped portion that is connected to the lower end portions of each of the pair of sheet portions 32 and is bent in a U-shape so as to be folded back from one side to the other side in the thickness direction, and exhibits flexibility.
　シール部３４は、一対のシート部３２を接続して、一対のシート部３２の間の空間をシールする部分である。シール部３４は、一対のシート部３２において厚さ方向及び上下方向の双方と直交する幅方向（図５における左右方向、以下、単に「幅方向」ともいう）の両端部に設けられている。シール部３４は、一対のシート部３２において上端から下端まで上下方向に延在する。シール部３４は、例えば、超音波溶着部、ヒートシール部、コールドシール部、ギアシール部等である。ギアシール部は、ギアを用いた加圧によって機械的に貼り合わされる部分である。シール部３４では、完全に密封されなくてもよい。電池用セパレータ３０内における電解液４０の流動性の観点から、シール部３４の少なくとも一方では、電解液４０が通過可能な領域が設けられてもよい。 The seal portion 34 is a portion that connects the pair of seat portions 32 and seals the space between the pair of seat portions 32. The seal portions 34 are provided at both ends of the pair of sheet portions 32 in the width direction (horizontal direction in FIG. 5, hereinafter simply referred to as “width direction”) orthogonal to both the thickness direction and the vertical direction. The seal portion 34 extends in the vertical direction from the upper end to the lower end in the pair of seat portions 32. The seal portion 34 is, for example, an ultrasonic welding portion, a heat seal portion, a cold seal portion, a gear seal portion, or the like. The gear seal portion is a portion that is mechanically bonded by pressurization using a gear. The seal portion 34 does not have to be completely sealed. From the viewpoint of the fluidity of the electrolytic solution 40 in the battery separator 30, a region through which the electrolytic solution 40 can pass may be provided on at least one of the sealing portions 34.
　接合部３５は、一対のシート部３２を接合する部分である。接合部３５は、一対のシート部３２において上端部に設けられている。具体的には、接合部３５は、一対のシート部３２の上端部において幅方向の中央から耳部２０ｂ側とは反対側の領域に設けられている。接合部３５は、幅方向に沿って延在する。接合部３５は、例えば、シート部３２自体が溶着された部分である。溶着不良の防止の観点から、接合部３５は、超音波溶着等によって形成されてもよい。 The joint portion 35 is a portion for joining a pair of seat portions 32. The joint portion 35 is provided at the upper end portion of the pair of seat portions 32. Specifically, the joint portion 35 is provided in the upper end portion of the pair of seat portions 32 in a region opposite to the selvage portion 20b side from the center in the width direction. The joint portion 35 extends along the width direction. The joint portion 35 is, for example, a portion where the sheet portion 32 itself is welded. From the viewpoint of preventing poor welding, the joint portion 35 may be formed by ultrasonic welding or the like.
　リブ３６は、例えば、セパレータ本体３１の耐久性向上、電槽１２０内における電解液４０の流動性向上等を図るために設けられる。リブ３６は、セパレータ本体３１の外面３１ｂに複数設けられている。複数のリブ３６のそれぞれは、一方のシート部３２の外面において上端から下端まで連続的に上下方向に沿って延びるリブ３６と、他方のシート部３２の外面において上端から下端まで連続的に上下方向に沿って延びるリブ３６と、これらの下端を繋ぐように折返し部３３の外面にて連続的に延びるリブ３６と、を含む。複数のリブ３６は、シート部３２の外面及び折返し部３３の外面から突出する。複数のリブ３６は、幅方向に互いに離間している。複数のリブ３６は、互いに平行に延在している。リブ３６の延在方向に対して直交するリブ３６の断面は、矩形状を呈するが、これに限られない。リブ３６の当該断面は、例えば、台形状でもよいし、逆台形状でもよい。 The rib 36 is provided, for example, for improving the durability of the separator main body 31 and improving the fluidity of the electrolytic solution 40 in the electric tank 120. A plurality of ribs 36 are provided on the outer surface 31b of the separator main body 31. Each of the plurality of ribs 36 has a rib 36 that continuously extends in the vertical direction from the upper end to the lower end on the outer surface of one seat portion 32, and a rib 36 that continuously extends in the vertical direction from the upper end to the lower end on the outer surface of the other seat portion 32. Includes ribs 36 that extend along the edges and ribs 36 that extend continuously on the outer surface of the folded portion 33 so as to connect these lower ends. The plurality of ribs 36 project from the outer surface of the seat portion 32 and the outer surface of the folded portion 33. The plurality of ribs 36 are separated from each other in the width direction. The plurality of ribs 36 extend parallel to each other. The cross section of the rib 36 orthogonal to the extending direction of the rib 36 exhibits a rectangular shape, but is not limited thereto. The cross section of the rib 36 may be, for example, trapezoidal or inverted trapezoidal.
　本実施形態では、折返し部３３（セパレータ本体３１の端部を覆う部分）には、スリット３７が形成されている。スリット３７は、セパレータ本体３１の内外を貫通する開口部分である。スリット３７は、一対のシート部３２の下端において接合されていない非接合部分を構成する。スリット３７は、折返し部３３における厚さ方向の中心から外れた位置を少なくとも通るように延びる長尺の開口部分である。スリット３７の形成方法としては特に限定されないが、例えばカッターによる切断によりスリット３７を形成してもよい。 In the present embodiment, a slit 37 is formed in the folded-back portion 33 (the portion covering the end portion of the separator main body 31). The slit 37 is an opening portion that penetrates the inside and outside of the separator main body 31. The slit 37 constitutes a non-joined portion that is not joined at the lower ends of the pair of sheet portions 32. The slit 37 is a long opening portion extending so as to pass at least a position deviated from the center in the thickness direction of the folded portion 33. The method for forming the slit 37 is not particularly limited, but the slit 37 may be formed by cutting with a cutter, for example.
　スリット３７は、下方から見て、折返し部３３における稜線Ｒ１に差し掛からないように延びる。例えば稜線Ｒ１は、折返し部３３の最も下方側の部分の連なりからなる線である。ここでの稜線Ｒ１は、中心線である。中心線は、折返し部３３における厚さ方向の中心を通る線である。例えば中心線は、折返し部３３を下方から見て、幅方向及び厚さ方向の中心を通り且つ幅方向に沿う線である。ここでのスリット３７は、下方から見て、幅方向に沿って延びる。スリット３７は、折返し部３３に複数形成されている、複数のスリット３７は、長さが等しい。スリット３７の長さは、スリット３７の延在方向における寸法である。 The slit 37 extends so as not to reach the ridge line R1 at the folded portion 33 when viewed from below. For example, the ridge line R1 is a line consisting of a series of the lowermost portions of the folded-back portion 33. The ridge line R1 here is a center line. The center line is a line passing through the center in the thickness direction of the folded portion 33. For example, the center line is a line that passes through the center in the width direction and the thickness direction and along the width direction when the folded-back portion 33 is viewed from below. The slit 37 here extends along the width direction when viewed from below. A plurality of slits 37 are formed in the folded-back portion 33, and the plurality of slits 37 have the same length. The length of the slit 37 is a dimension in the extending direction of the slit 37.
　スリット３７は、複数のリブ３６を分断する。スリット３７を介して露出するリブ３６の端面とシート部３２の端面とは、スリット３７の端面として同じ面上に位置するように連なる。複数のリブ３６は、互いに隣接する第１リブ３６１及び第２リブ３６２と、互いに隣接する第３リブ３６３及び第４リブ３６４と、を含む。スリット３７の一端は、第１リブ３６１と第２リブ３６２との間に位置する。スリットの他端は、第３リブ３６３と第４リブ３６４との間に位置する。例えばスリット３７の第１位置（例えば中央位置）における幅は、スリット３７の第２位置（例えば一端と中央との間の位置）における幅と異なる。スリット３７の幅は、スリット３７における延在方向と直交する方向の寸法である。 The slit 37 divides a plurality of ribs 36. The end surface of the rib 36 exposed through the slit 37 and the end surface of the sheet portion 32 are connected so as to be located on the same surface as the end surface of the slit 37. The plurality of ribs 36 include a first rib 361 and a second rib 362 adjacent to each other, and a third rib 363 and a fourth rib 364 adjacent to each other. One end of the slit 37 is located between the first rib 361 and the second rib 362. The other end of the slit is located between the third rib 363 and the fourth rib 364. For example, the width of the slit 37 at the first position (for example, the center position) is different from the width of the slit 37 at the second position (for example, the position between one end and the center). The width of the slit 37 is a dimension in a direction orthogonal to the extending direction in the slit 37.
　スリット３７は、幅方向において足部２０ｄ，２０ｅから離間する位置に形成されている。スリット３７は、幅方向において足部２０ｅの一方側と他方側とのそれぞれに形成されている。幅方向において、スリット３７の中心は、隣接する一対の凸部１６０ａの間に位置する。幅方向において、スリット３７の長さは、凸部１６０ａの幅よりも大きい。幅方向において、スリット３７の長さは、隣接する一対の凸部１６０ａの間隔よりも小さい。 The slit 37 is formed at a position separated from the foot portions 20d and 20e in the width direction. The slits 37 are formed on one side and the other side of the foot portion 20e in the width direction, respectively. In the width direction, the center of the slit 37 is located between a pair of adjacent convex portions 160a. In the width direction, the length of the slit 37 is larger than the width of the convex portion 160a. In the width direction, the length of the slit 37 is smaller than the distance between the pair of adjacent protrusions 160a.
　次に、鉛蓄電池１００の製造方法の例について説明する。鉛蓄電池１００の製造方法は、各構成部材を組み立てて鉛蓄電池１００を得る組立て工程を少なくとも備える。組立て工程では、例えば、未化成の正極１０と未化成の電池用セパレータ３０に覆われてなる負極２０とを積層すると共に、同極性の電極の集電部をストラップで溶接させて電極群１１０を得る。電極群１１０を電槽１２０内に進入させて配置し、未化成の電池を作製する。未化成の電池に希硫酸を入れて直流電流を通電して電槽化成する。化成後の硫酸の比重を適切な比重に調整することにより鉛蓄電池１００を得る。なお、化成処理は、組立て工程の後に実施されることに限られず、組立て工程の前に実施されてもよい（タンク化成）。 Next, an example of a method for manufacturing the lead-acid battery 100 will be described. The method for manufacturing the lead-acid battery 100 includes at least an assembly step of assembling each component to obtain the lead-acid battery 100. In the assembly process, for example, the unchemical positive electrode 10 and the negative electrode 20 covered with the unchemical battery separator 30 are laminated, and the current collecting portions of electrodes having the same polarity are welded with a strap to form the electrode group 110. obtain. The electrode group 110 is inserted into the electric tank 120 and arranged to produce an unchemical battery. Dilute sulfuric acid is put into a non-chemical battery and a direct current is applied to form an electric tank. The lead storage battery 100 is obtained by adjusting the specific gravity of sulfuric acid after chemical conversion to an appropriate specific density. The chemical conversion treatment is not limited to being carried out after the assembly step, and may be carried out before the assembly step (tank chemical conversion).
　以上、電池用セパレータ３０、電極３、鉛蓄電池１００、組電池２００及びフォークリフト１では、セパレータ本体３１の折返し部３３にスリット３７が形成されている。電槽１２０は、負極２０を支持する複数の凸部１６０ａを有する。幅方向においてスリット３７の中心は、隣接する一対の凸部１６０ａの間に位置する。この場合、スリット３７が凸部１６０ａによって完全に塞がれることを抑制することが可能となる。よって、スリット３７を介した電解液４０の流通が妨げられることを回避することが可能となる。 As described above, in the battery separator 30, the electrode 3, the lead storage battery 100, the assembled battery 200, and the forklift 1, a slit 37 is formed in the folded portion 33 of the separator main body 31. The battery case 120 has a plurality of convex portions 160a that support the negative electrode 20. In the width direction, the center of the slit 37 is located between a pair of adjacent convex portions 160a. In this case, it is possible to prevent the slit 37 from being completely closed by the convex portion 160a. Therefore, it is possible to avoid obstructing the flow of the electrolytic solution 40 through the slit 37.
　電池用セパレータ３０では、幅方向においてスリット３７の長さは、凸部１６０ａの幅よりも大きい。この場合、スリット３７の一部分と重なる位置に凸部１６０ａが位置する場合でも、スリット３７の他部分を介して電解液４０を流通させることが可能となる。 In the battery separator 30, the length of the slit 37 in the width direction is larger than the width of the convex portion 160a. In this case, even when the convex portion 160a is located at a position overlapping a part of the slit 37, the electrolytic solution 40 can be circulated through the other portion of the slit 37.
　電池用セパレータ３０では、幅方向においてスリット３７の長さは、隣接する一対の凸部１６０ａの間隔よりも小さい。この場合、凸部１６０ａと重ならない位置にスリット３７が存在しやすくなり、スリット３７を介した電解液４０の流通経路が確保しやすくなる。 In the battery separator 30, the length of the slit 37 in the width direction is smaller than the distance between the pair of adjacent convex portions 160a. In this case, the slit 37 is likely to exist at a position that does not overlap with the convex portion 160a, and it is easy to secure a distribution path for the electrolytic solution 40 through the slit 37.
　電池用セパレータ３０では、スリット３７は、折返し部３３に形成されている。この場合、折返し部３３に形成されたスリット３７を介した電解液４０の流通が妨げられることを回避できる。 In the battery separator 30, the slit 37 is formed in the folded portion 33. In this case, it is possible to avoid obstructing the flow of the electrolytic solution 40 through the slit 37 formed in the folded portion 33.
　電池用セパレータ３０では、スリット３７は、折返し部３３に複数形成されている。この場合、折返し部３３において一部のスリット３７が凸部１６０ａによって塞がれても、他のスリット３７で電解液４０の流通経路が確保されやすくなる。 In the battery separator 30, a plurality of slits 37 are formed in the folded-back portion 33. In this case, even if a part of the slit 37 is blocked by the convex portion 160a in the folded portion 33, the distribution path of the electrolytic solution 40 can be easily secured in the other slit 37.
　電池用セパレータ３０では、複数のスリット３７は、長さが等しい。この場合、スリット３７を介した電解液４０の流通量を一定に制御しやすくなる。同じ長さでスリット３７を形成すればよいため、製造効率を高めることができる。 In the battery separator 30, the plurality of slits 37 have the same length. In this case, it becomes easy to control the flow amount of the electrolytic solution 40 through the slit 37 to be constant. Since the slits 37 may be formed with the same length, the manufacturing efficiency can be improved.
　電池用セパレータ３０では、スリット３７は、リブ３６を分断する。この場合、スリット３７の端面の位置にリブ３６が位置するため、リブ３６によりスリット３７の端面の強度を高めることができる。スリット３７の端面が破損しにくくなる。 In the battery separator 30, the slit 37 divides the rib 36. In this case, since the rib 36 is located at the position of the end surface of the slit 37, the strength of the end surface of the slit 37 can be increased by the rib 36. The end face of the slit 37 is less likely to be damaged.
　電池用セパレータ３０では、スリット３７は、複数のリブ３６を分断する。この場合、スリット３７の端面の位置に複数のリブ３６が位置するため、複数の当該リブ３６によりスリット３７の端面の強度を一層高めることができる。スリット３７の端面が一層破損しにくくなる。 In the battery separator 30, the slit 37 divides a plurality of ribs 36. In this case, since the plurality of ribs 36 are located at the positions of the end faces of the slits 37, the strength of the end faces of the slits 37 can be further increased by the plurality of ribs 36. The end face of the slit 37 is less likely to be damaged.
　電池用セパレータ３０では、複数のリブ３６は、互いに隣接する第１リブ３６１及び第２リブ３６２を含む。スリット３７の一端は、第１リブ３６１と第２リブ３６２との間に位置する。この場合、スリット３７の一端を起点にセパレータ本体３１が裂けそうになったとしても、第１リブ３６１又は第２リブ３６２の厚みによって裂け難くなり、望まない長さまでスリット３７が広がってしまうことを抑制できる。また、スリット３７をカッターによる切断で形成する場合に、切断始め位置（カッターの刃が入る位置）にリブ３６が位置しなくなるため、カッターの刃がリブ３６に引っ掛かる等の不良が生じにくい。 In the battery separator 30, the plurality of ribs 36 include a first rib 361 and a second rib 362 adjacent to each other. One end of the slit 37 is located between the first rib 361 and the second rib 362. In this case, even if the separator main body 31 is about to tear from one end of the slit 37, it becomes difficult to tear due to the thickness of the first rib 361 or the second rib 362, and the slit 37 expands to an undesired length. It can be suppressed. Further, when the slit 37 is formed by cutting with a cutter, the rib 36 is not positioned at the cutting start position (the position where the cutter blade enters), so that defects such as the cutter blade being caught by the rib 36 are unlikely to occur.
　電池用セパレータ３０では、複数のリブ３６は、互いに隣接する第３リブ３６３及び第４リブ３６４を含む。スリット３７の他端は、第３リブ３６３と第４リブ３６４との間に位置する。この場合、スリット３７の他端を起点にセパレータ本体３１が裂けそうになったとしても、第３リブ３６３又は第４リブ３６４の厚みによって裂け難くなり、望まない長さまでスリット３７が広がってしまうことを抑制できる。また、スリット３７をカッターによる切断で形成する場合に、切断終わり位置（カッターの刃が離れる位置）にリブ３６が位置しなくなるため、カッターの刃がリブ３６に引っ掛かる等の不良が生じにくい。 In the battery separator 30, the plurality of ribs 36 include a third rib 363 and a fourth rib 364 adjacent to each other. The other end of the slit 37 is located between the third rib 363 and the fourth rib 364. In this case, even if the separator main body 31 is about to tear from the other end of the slit 37, it becomes difficult to tear due to the thickness of the third rib 363 or the fourth rib 364, and the slit 37 expands to an undesired length. Can be suppressed. Further, when the slit 37 is formed by cutting with a cutter, the rib 36 is not positioned at the cutting end position (the position where the cutter blade is separated), so that defects such as the cutter blade being caught by the rib 36 are unlikely to occur.
　電池用セパレータ３０では、スリット３７の第１位置における幅は、スリット３７の第２位置における幅と異なる。これにより、スリット３７と重なる位置に一定の幅を持つ凸部１６０ａが位置するような場合に、電解液４０の流通経路が確保されやすくなる。 In the battery separator 30, the width of the slit 37 at the first position is different from the width of the slit 37 at the second position. As a result, when the convex portion 160a having a certain width is located at the position overlapping with the slit 37, the distribution path of the electrolytic solution 40 can be easily secured.
　以上、実施形態について説明したが、本発明の一態様は上記実施形態に限定されない。 Although the embodiments have been described above, one aspect of the present invention is not limited to the above embodiments.
　上記実施形態では、リブ３６は直線状に延在しているが、これに限られない。例えば、リブ３６は波線状に延在してもよいし、ジグザグ状に延在してもよい。リブ３６は、断続的に形成されていてもよいし、点形状（ドット形状）でもよいし、円形状でもよいし、楕円形状でもよいし、多角形状でもよい。リブ３６は、多角錐形状でもよいし、多角錐台形状でもよいし、円錐形状でもよいし、円錐台形状でもよい。リブ３６の断面は、半円形状でもよいし、多角形状でもよい。リブ３６は、上下方向に沿って延在してもよいし、これに代えて若しくは加えて幅方向に沿って延在してもよい。 In the above embodiment, the rib 36 extends linearly, but the rib 36 is not limited to this. For example, the rib 36 may extend in a wavy shape or may extend in a zigzag shape. The rib 36 may be formed intermittently, may have a point shape (dot shape), may have a circular shape, may have an elliptical shape, or may have a polygonal shape. The rib 36 may have a polygonal pyramid shape, a polygonal pyramid shape, a conical shape, or a truncated cone shape. The cross section of the rib 36 may be semicircular or polygonal. The rib 36 may extend along the vertical direction, or may extend in lieu of or in addition to the rib 36 along the width direction.
　上記実施形態では、スリット３７が複数のリブ３６を分断しているが、少なくとも１つのリブ３６を分断すればよい。上記実施形態では、スリット３７の第１位置における幅がスリット３７の第２位置における幅と異なるが、これらが同じであってもよい。第１位置及び第２位置としては特に限定されず、スリット３７の互いに異なる位置であればよい。上記実施形態では、稜線Ｒ１は折返し部３３の中心線でもあるが、稜線Ｒ１は中心線でなくてもよい。 In the above embodiment, the slit 37 divides the plurality of ribs 36, but at least one rib 36 may be divided. In the above embodiment, the width of the slit 37 at the first position is different from the width of the slit 37 at the second position, but these may be the same. The first position and the second position are not particularly limited, and may be any position as long as they are different from each other in the slit 37. In the above embodiment, the ridge line R1 is also the center line of the folded portion 33, but the ridge line R1 does not have to be the center line.
　上記実施形態では、２つのスリット３７が形成されているが、３つ以上のスリット３７が形成されていてもよい。上記実施形態では、全てのスリット３７の長さが同じであるが、３つ以上のスリット３７が形成される場合には、その一部の長さが同じであってもよい。或いは、上記実施形態では、複数のスリット３７のうちの一部又は全部は、長さが異なっていてもよい。この場合には、製造時に電池用セパレータ３０の向きを判別しやすくなる。 In the above embodiment, two slits 37 are formed, but three or more slits 37 may be formed. In the above embodiment, the lengths of all the slits 37 are the same, but when three or more slits 37 are formed, the lengths of some of them may be the same. Alternatively, in the above embodiment, some or all of the plurality of slits 37 may have different lengths. In this case, it becomes easy to determine the orientation of the battery separator 30 at the time of manufacturing.
　図９は、変形例に係る電池用セパレータ５３０を下方から見た図である。図９に示されるように、折返し部３３には、スリット３７（図８参照）に代えてもしくは加えて、折返し部３３における厚さ方向の中心を通る中心線及び／又は稜線Ｒ１に対して傾斜する方向に延びるスリット３３７が形成されていてもよい。この場合、当該中心線及び／又は当該稜線Ｒ１と重なる位置に凸部１６０ａが位置する場合でも、スリット３３７は完全に塞がれにくく、電解液４０の流通経路が確保されやすくなる。 FIG. 9 is a view of the battery separator 530 according to the modified example as viewed from below. As shown in FIG. 9, the folded portion 33 is inclined with respect to the center line and / or the ridge line R1 passing through the center in the thickness direction of the folded portion 33 in place of or in addition to the slit 37 (see FIG. 8). A slit 337 extending in the direction of the ridge may be formed. In this case, even when the convex portion 160a is located at a position overlapping the center line and / or the ridge line R1, the slit 337 is not completely closed and the distribution path of the electrolytic solution 40 is easily secured.
　なお、スリット３７に加えてスリット３３７が形成される場合、これらは折返し部３３における中心線に対して非対称の位置に形成されることになる。この場合、製造時に電池用セパレータ３０の向きが判別しやすくなる。スリット３７についても、折返し部３３における厚さ方向の中心を通る中心線及び／又は稜線Ｒ１に対して傾斜する方向に延びていてもよい。 When slits 337 are formed in addition to the slits 37, they are formed at positions asymmetric with respect to the center line of the folded portion 33. In this case, it becomes easy to determine the orientation of the battery separator 30 at the time of manufacturing. The slit 37 may also extend in a direction inclined with respect to the center line and / or the ridge line R1 passing through the center in the thickness direction of the folded portion 33.
　上記実施形態では、セパレータ本体３１は折返し部３３を含むが、これに限定されず、負極２０の端部を少なくとも覆う構成であればよい。例えば図１０（ａ）及び図１０（ｂ）に示されるように、セパレータ本体３１は、一対のシート部３２それぞれの下端部（負極２０の厚さ方向の一方側と他方側とに配置されたシート部３２の各下端部）を溶着する溶着部分４３１を有していてもよい。この場合、シート部３２の下端部における溶着部分４３１以外の部分により、スリット３７（図８参照）と同様なスリット４３７を形成してもよい。なお、図１０（ａ）では、便宜上、リブ３６を省略して示す。 In the above embodiment, the separator main body 31 includes the folded-back portion 33, but is not limited to this, and may be configured to cover at least the end portion of the negative electrode 20. For example, as shown in FIGS. 10A and 10B, the separator main body 31 is arranged at the lower end portions of each of the pair of sheet portions 32 (one side and the other side in the thickness direction of the negative electrode 20). It may have a welded portion 431 for welding (each lower end portion of the sheet portion 32). In this case, a slit 437 similar to the slit 37 (see FIG. 8) may be formed by a portion other than the welded portion 431 at the lower end portion of the sheet portion 32. In FIG. 10A, the rib 36 is omitted for convenience.
　また例えば図１１に示されるように、セパレータ本体３１は、一対のシート部３２の幅方向の両端が折返し部５３３を介して一体的に連続する構成（つまり、上下方向を軸方向とする筒状の構成）であってもよい。また例えば図１２に示されるように、セパレータ本体３１は、一対のシート部３２の幅方向の一端又は他端が折返し部６３３を介して一体的に連続する構成であってもよい。特に図示されるように、積層される複数のシート部３２では、折返し部６３３で連続する幅方向の一端と他端とが、当該積層方向において交互に入れ替わっていてもよく、これにより、セパレータ本体３１が蛇腹状に折りたたまれる構成が実現される。これらの場合、折返し部５３３，６３３にスリット３７と同様なスリットを形成してもよい。なお、図１１及び図１２では、便宜上、リブ３６を省略して示す。 Further, as shown in FIG. 11, for example, the separator main body 31 has a configuration in which both ends of the pair of sheet portions 32 in the width direction are integrally continuous via the folded-back portion 533 (that is, a cylindrical shape whose axial direction is the vertical direction). The configuration of) may be used. Further, for example, as shown in FIG. 12, the separator main body 31 may have a configuration in which one end or the other end of the pair of sheet portions 32 in the width direction is integrally continuous via the folded-back portion 633. As shown in particular, in the plurality of sheet portions 32 to be laminated, one end and the other end in the width direction continuous in the folded portion 633 may be alternately alternated in the laminated direction, whereby the separator main body may be alternated. A configuration in which 31 is folded in a bellows shape is realized. In these cases, a slit similar to the slit 37 may be formed in the folded portion 533, 633. In FIGS. 11 and 12, the rib 36 is omitted for convenience.
　上記実施形態では、凸部１６０ａが電槽１２０の底面上に電槽１２０とは別体で設けられているが、凸部１６０ａが電槽１２０と一体で設けられていてもよい。上記実施形態では、電気車（電動車）として、フォークリフト１を一例に説明したが、電気車は、例えば、ゴルフカート等であってもよい。また、フォークリフト１に組電池２００が搭載されている形態を一例に説明したが、フォークリフト１に鉛蓄電池１００が搭載されていてもよい。 In the above embodiment, the convex portion 160a is provided on the bottom surface of the electric tank 120 separately from the electric tank 120, but the convex portion 160a may be provided integrally with the electric tank 120. In the above embodiment, the forklift 1 has been described as an example of the electric vehicle (electric vehicle), but the electric vehicle may be, for example, a golf cart or the like. Further, although the embodiment in which the assembled battery 200 is mounted on the forklift 1 has been described as an example, the lead storage battery 100 may be mounted on the forklift 1.
　上記実施形態及び変形例における各構成には、上述した材料及び形状に限定されず、様々な材料及び形状を適用することができる。上記実施形態又は変形例における各構成は、他の実施形態又は変形例における各構成に任意に適用することができる。上記実施形態又は変形例における各構成の一部は、本発明の一態様の要旨を逸脱しない範囲で適宜に省略可能である。 Not limited to the above-mentioned materials and shapes, various materials and shapes can be applied to each configuration in the above-described embodiments and modifications. Each configuration in the above embodiment or modification can be arbitrarily applied to each configuration in another embodiment or modification. A part of each configuration in the above-described embodiment or modification can be appropriately omitted without departing from the gist of one aspect of the present invention.
　１…フォークリフト（電気車）、３…電極、２０…負極（極板）、２０ｄ，２０ｅ…足部、３０，５３０…電池用セパレータ、３１…セパレータ本体、３１ａ…内面、３１ｂ…外面、３３，５３３，６３３…折返し部、３６…リブ、３７，３３７，４３７…スリット、１００…鉛蓄電池、１１０…電極群（極板群）、１２０…電槽、１６０ａ…凸部、２００…組電池、３６１…第１リブ、３６２…第２リブ、３６３…第３リブ、３６４…第４リブ、Ｒ１…稜線。 1 ... Forklift (electric vehicle), 3 ... Electrode, 20 ... Negative electrode (pole plate), 20d, 20e ... Foot, 30,530 ... Battery separator, 31 ... Separator body, 31a ... Inner surface, 31b ... Outer surface, 33, 533, 633 ... Folded part, 36 ... Rib, 37, 337, 437 ... Slit, 100 ... Lead storage battery, 110 ... Electrode group (pole plate group), 120 ... Electric tank, 160a ... Convex part, 200 ... Assembly battery, 361 ... 1st rib, 362 ... 2nd rib, 363 ... 3rd rib, 364 ... 4th rib, R1 ... Ridge line.

Claims (17)

  1. 　電槽に立てて収容される極板の下端部を少なくとも覆うセパレータ本体を備え、
    　前記電槽は、当該電槽の底面上に一体又は別体で設けられ前記極板を支持する複数の凸部を有し、
    　前記セパレータ本体の前記下端部を覆う部分には、スリットが形成され、
    　前記スリットの中心は、隣接する一対の前記凸部の間に位置する、電池用セパレータ。     Equipped with a separator body that at least covers the lower end of the electrode plate that is housed upright in the battery case
    The electric tank has a plurality of convex portions that are integrally or separately provided on the bottom surface of the electric tank and support the electrode plate.
    A slit is formed in a portion of the separator body that covers the lower end portion.
    The center of the slit is a battery separator located between a pair of adjacent convex portions.
  2. 　前記極板の厚さ方向と直交する水平方向において、前記スリットの長さは、前記凸部の幅よりも大きい、請求項１に記載の電池用セパレータ。 The battery separator according to claim 1, wherein the length of the slit is larger than the width of the convex portion in the horizontal direction orthogonal to the thickness direction of the electrode plate.
  3. 　前記極板の厚さ方向と直交する水平方向において、前記スリットの長さは、隣接する一対の前記凸部の間隔よりも小さい、請求項１に記載の電池用セパレータ。 The battery separator according to claim 1, wherein the length of the slit is smaller than the distance between the pair of adjacent convex portions in the horizontal direction orthogonal to the thickness direction of the electrode plate.
  4. 　前記セパレータ本体は、前記極板の厚さ方向の一方側から他方側に折り返すように屈曲する折返し部を有し、
    　前記スリットは、前記折返し部に形成されている、請求項１～３の何れか一項に記載の電池用セパレータ。     The separator main body has a folded portion that bends so as to be folded from one side to the other side in the thickness direction of the electrode plate.
    The battery separator according to any one of claims 1 to 3, wherein the slit is formed in the folded portion.
  5. 　前記スリットは、前記折返し部に複数形成されている、請求項４に記載の電池用セパレータ。 The battery separator according to claim 4, wherein a plurality of the slits are formed in the folded portion.
  6. 　複数の前記スリットのうちの一部又は全部は、長さが等しい、請求項５に記載の電池用セパレータ。 The battery separator according to claim 5, wherein some or all of the plurality of slits have the same length.
  7. 　複数の前記スリットのうちの一部又は全部は、長さが異なる、請求項５に記載の電池用セパレータ。 The battery separator according to claim 5, wherein some or all of the plurality of slits have different lengths.
  8. 　複数の前記スリットは、前記折返し部における前記極板の厚さ方向の中心を通る中心線に対して非対称の位置に形成されている、請求項５～７の何れか一項に記載の電池用セパレータ。 The battery according to any one of claims 5 to 7, wherein the plurality of slits are formed at positions asymmetric with respect to a center line passing through the center in the thickness direction of the electrode plate at the folded portion. Separator.
  9. 　前記セパレータ本体は、前記極板側の内面と、前記内面の反対側の外面と、を有し、
    　前記内面及び前記外面の少なくとも何れかには、複数のリブが設けられ、
    　前記スリットは、少なくとも１つの前記リブを分断する、請求項１～８の何れか一項に記載の電池用セパレータ。     The separator main body has an inner surface on the plate side and an outer surface on the opposite side of the inner surface.
    A plurality of ribs are provided on at least one of the inner surface and the outer surface.
    The battery separator according to any one of claims 1 to 8, wherein the slit divides at least one of the ribs.
  10. 　前記スリットは、複数の前記リブを分断する、請求項９に記載の電池用セパレータ。 The battery separator according to claim 9, wherein the slit divides a plurality of the ribs.
  11. 　複数の前記リブは、互いに隣接する第１リブ及び第２リブを含み、
    　前記スリットの一端は、前記第１リブと前記第２リブとの間に位置する、請求項９又は１０に記載の電池用セパレータ。     The plurality of ribs include a first rib and a second rib adjacent to each other.
    The battery separator according to claim 9 or 10, wherein one end of the slit is located between the first rib and the second rib.
  12. 　複数の前記リブは、互いに隣接する第３リブ及び第４リブを含み、
    　前記スリットの他端は、前記第３リブと前記第４リブとの間に位置する、請求項１１に記載の電池用セパレータ。     The plurality of ribs include a third rib and a fourth rib adjacent to each other.
    The battery separator according to claim 11, wherein the other end of the slit is located between the third rib and the fourth rib.
  13. 　前記スリットの第１位置における幅は、当該スリットの第２位置における幅と異なる、請求項１～１２の何れか一項に記載の電池用セパレータ。 The battery separator according to any one of claims 1 to 12, wherein the width of the slit at the first position is different from the width of the slit at the second position.
  14. 　電槽に収容される極板と、
    　請求項１～１３の何れか一項に記載の電池用セパレータと、を備える電極。     The electrode plate housed in the battery case and
    An electrode comprising the battery separator according to any one of claims 1 to 13.
  15. 　正極板と負極板とが交互に積層するように複数配置された極板群と、
    　前記極板群を立てて収容する電槽と、を備え、
    　前記極板群は、請求項１～１４の何れか一項の電池用セパレータを複数有し、
    　前記電池用セパレータの前記セパレータ本体は、前記正極板及び前記負極板の何れかにおける下端部を少なくとも覆う、鉛蓄電池。     A group of electrode plates arranged so that positive electrode plates and negative electrode plates are alternately laminated, and
    It is equipped with an electric tank for accommodating the electrode plates in an upright position.
    The electrode plate group has a plurality of battery separators according to any one of claims 1 to 14.
    The separator main body of the battery separator is a lead storage battery that covers at least the lower end portion of either the positive electrode plate or the negative electrode plate.
  16. 　請求項１５に記載の鉛蓄電池を複数備える、組電池。 An assembled battery including a plurality of lead-acid batteries according to claim 15.
  17. 　請求項１５に記載の鉛蓄電池を備える、電気車。 An electric vehicle equipped with the lead storage battery according to claim 15.
PCT/JP2020/042065 2020-11-11 2020-11-11 Separator for batteries, electrode, lead acid stroage battery, battery pack and electric automobile WO2022102013A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010456A (en) * 1973-06-06 1975-02-03
JPH0469851U (en) * 1990-10-29 1992-06-19
JP2007026967A (en) * 2005-07-20 2007-02-01 Shin Kobe Electric Mach Co Ltd Manufacturing method of electrode plate containing bag separator
US20120214032A1 (en) * 2009-09-04 2012-08-23 Jonson Controls Technology Company Secondary battery with improved destratification
JP2012182080A (en) * 2011-03-02 2012-09-20 Shin Kobe Electric Mach Co Ltd Lead acid battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010456A (en) * 1973-06-06 1975-02-03
JPH0469851U (en) * 1990-10-29 1992-06-19
JP2007026967A (en) * 2005-07-20 2007-02-01 Shin Kobe Electric Mach Co Ltd Manufacturing method of electrode plate containing bag separator
US20120214032A1 (en) * 2009-09-04 2012-08-23 Jonson Controls Technology Company Secondary battery with improved destratification
JP2012182080A (en) * 2011-03-02 2012-09-20 Shin Kobe Electric Mach Co Ltd Lead acid battery

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