WO2022102013A1 - Séparateur pour batteries, électrode, batterie de stockage au plomb-acide, bloc-batterie et automobile électrique - Google Patents

Séparateur pour batteries, électrode, batterie de stockage au plomb-acide, bloc-batterie et automobile électrique 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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WIPO (PCT)
Prior art keywords
slit
battery
rib
battery separator
separator
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Ceased
Application number
PCT/JP2020/042065
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English (en)
Japanese (ja)
Inventor
智紀 武部
将典 村松
瑠璃子 今泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Corp
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Showa Denko Materials Co Ltd
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Filing date
Publication date
Application filed by Showa Denko Materials Co Ltd filed Critical Showa Denko Materials Co Ltd
Priority to PCT/JP2020/042065 priority Critical patent/WO2022102013A1/fr
Publication of WO2022102013A1 publication Critical patent/WO2022102013A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Cell Separators (AREA)

Abstract

La présente invention concerne un séparateur pour batteries comprenant un corps principal de séparateur qui recouvre au moins une extrémité inférieure d'une électrode négative qui est contenue dans un boîtier de batterie de façon à rester en position verticale. Le boîtier de batterie comprend une pluralité de parties saillantes qui sont disposées sur la surface inférieure du boîtier de batterie de manière intégrée ou séparément de manière à supporter une plaque d'électrode. Une partie du corps principal de séparateur, ladite partie recouvrant l'extrémité inférieure, est pourvue d'une fente. Le centre de la fente est positionné entre une paire de parties saillantes qui sont adjacentes l'une à l'autre.
PCT/JP2020/042065 2020-11-11 2020-11-11 Séparateur pour batteries, électrode, batterie de stockage au plomb-acide, bloc-batterie et automobile électrique Ceased WO2022102013A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/042065 WO2022102013A1 (fr) 2020-11-11 2020-11-11 Séparateur pour batteries, électrode, batterie de stockage au plomb-acide, bloc-batterie et automobile électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/042065 WO2022102013A1 (fr) 2020-11-11 2020-11-11 Séparateur pour batteries, électrode, batterie de stockage au plomb-acide, bloc-batterie et automobile électrique

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WO2022102013A1 true WO2022102013A1 (fr) 2022-05-19

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010456A (fr) * 1973-06-06 1975-02-03
JPH0469851U (fr) * 1990-10-29 1992-06-19
JP2007026967A (ja) * 2005-07-20 2007-02-01 Shin Kobe Electric Mach Co Ltd 袋セパレータ入り電極板の製造方法
US20120214032A1 (en) * 2009-09-04 2012-08-23 Jonson Controls Technology Company Secondary battery with improved destratification
JP2012182080A (ja) * 2011-03-02 2012-09-20 Shin Kobe Electric Mach Co Ltd 鉛蓄電池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010456A (fr) * 1973-06-06 1975-02-03
JPH0469851U (fr) * 1990-10-29 1992-06-19
JP2007026967A (ja) * 2005-07-20 2007-02-01 Shin Kobe Electric Mach Co Ltd 袋セパレータ入り電極板の製造方法
US20120214032A1 (en) * 2009-09-04 2012-08-23 Jonson Controls Technology Company Secondary battery with improved destratification
JP2012182080A (ja) * 2011-03-02 2012-09-20 Shin Kobe Electric Mach Co Ltd 鉛蓄電池

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