Power storage device manufacturing apparatus and power storage device manufacturing method

Abstract

To provide a manufacturing device of a power storage device and a manufacturing method of the power storage device capable of suppressing positional deviation of a shim.SOLUTION: In a manufacturing device 2 of a power storage device, the power storage device includes a power storage unit 10 having a power storage element, a shim 300 arranged adjacent to the power storage unit, and a case for housing the power storage unit and the shim, the manufacturing device includes a holding part 20 for holding the power storage unit, and the holding part holds the shim.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an apparatus for manufacturing an electricity storage device and a method for manufacturing an electricity storage device. [Background technology]

[0002] Patent Document 1 discloses a battery module and a battery module manufacturing method in which a shim is placed between a battery stack and a housing case, and the shim is used to pressurize the battery stack with a predetermined pressure, thereby making it possible to suppress variations in the pressure even if manufacturing errors occur in the battery stack and the housing case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-44183 Summary of the Invention [Problem to be solved by the invention]

[0004] In the battery module and battery module manufacturing method disclosed in Patent Document 1, if the shim is misaligned when it is placed between the battery stack and the case, problems such as the battery stack not being able to be pressed with an appropriate pressure may occur. If the bottom of the case has a rounded portion (rounded corner), and the shim is placed in a tilted state in contact with the rounded portion, the shim may cause wear on the case or a deterioration in vibration resistance.

[0005] The present invention was made by the inventor of the present application by focusing on the above-mentioned problem, and aims to provide an energy storage device manufacturing apparatus and an energy storage device manufacturing method that can suppress shim misalignment. [Means for solving the problem]

[0006] A manufacturing apparatus for a storage device according to one embodiment of the present invention is a manufacturing apparatus for a storage device, wherein the storage device comprises a storage unit having a storage element, a shim arranged adjacent to the storage unit, and a case for accommodating the storage unit and the shim, and the manufacturing apparatus comprises a holding section for holding the storage unit, and the holding section holds the shim.

[0007] A manufacturing method for a storage device according to one aspect of the present invention is a manufacturing method for a storage device, wherein the storage device comprises a storage unit having a storage element, a shim arranged adjacent to the storage unit, and a case that houses the storage unit and the shim, and the manufacturing method includes holding the shim with a holding portion that holds the storage unit. [Effects of the Invention]

[0008] According to the electricity storage device manufacturing apparatus and the like of the present invention, it is possible to suppress misalignment of the shim. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the configuration of an electricity storage device according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the energy storage elements, spacers, and shims of the energy storage unit included in the energy storage device according to the embodiment. [Figure 3] FIG. 3 is a perspective view showing the configuration of the energy storage element according to the embodiment. [Figure 4] FIG. 4 is a perspective view showing the configuration of a spacer according to the embodiment. [Figure 5] FIG. 5 is a perspective view showing the configuration of a shim according to the embodiment. [Figure 6A] FIG. 6A is a cross-sectional view showing the positional relationship between a shim, an electricity storage unit (spacer), and a case (case main body) according to the embodiment. [Figure 6B] FIG. 6B is a cross-sectional view showing the configuration around the end of the shim according to the embodiment. [Figure 7]FIG. 7 is a perspective view showing the configuration of a manufacturing apparatus for an electricity storage device according to an embodiment. [Figure 8] FIG. 8 is a perspective view showing the configuration of the energy storage device manufacturing apparatus according to the embodiment in a state where the energy storage unit is held by the energy storage device manufacturing apparatus. [Figure 9] FIG. 9 is a perspective view showing the configuration of the energy storage device manufacturing apparatus according to the embodiment in a state where the energy storage unit and the shim are held. [Figure 10] FIG. 10 is a front view showing the configuration of the energy storage device manufacturing apparatus according to the embodiment in a state where the energy storage unit and the shim are held. [Figure 11] FIG. 11 is a cross-sectional view showing the configuration of the energy storage device manufacturing apparatus according to the embodiment in a state where the energy storage unit and the shim are held. [Figure 12] FIG. 12 is a cross-sectional view showing a configuration in which the manufacturing apparatus for electricity storage devices according to the embodiment compresses the electricity storage unit and inserts it into the case body together with the shim. [Figure 13] FIG. 13 is a cross-sectional view showing the configuration of the energy storage unit in a state where the energy storage device manufacturing apparatus according to the embodiment releases compression of the energy storage unit. DETAILED DESCRIPTION OF THE INVENTION

[0010] (1) An apparatus for manufacturing an energy storage device according to one aspect of the present invention is an apparatus for manufacturing an energy storage device, wherein the energy storage device comprises a storage unit having an energy storage element, a shim arranged adjacent to the storage unit, and a case for accommodating the storage unit and the shim, and the manufacturing apparatus comprises a holding section for holding the energy storage unit, and the holding section holds the shim.

[0011] In the energy storage device manufacturing apparatus according to one aspect of the present invention, the holding portion that holds the energy storage unit holds the shim. In this way, when the holding portion holds the energy storage unit, the holding portion also holds the shim, so that the shim can be positioned relative to the energy storage unit. This makes it possible to prevent the shim from shifting position when manufacturing the energy storage device.

[0012] (2) In the manufacturing apparatus for an electric storage device described in (1) above, the holding unit may hold the shim by magnetic force.

[0013] According to the manufacturing apparatus for an electricity storage device described in (2) above, the holding portion holds the shim by magnetic force, so that the shim can be easily held using a magnet or the like.

[0014] (3) In the energy storage device manufacturing apparatus according to (1) or (2) above, the holding unit may hold the shim in a state where the holding unit and the shim are not in contact with each other.

[0015] According to the manufacturing apparatus for an electric storage device described in (3) above, the holding portion holds the shim without contacting the shim, thereby preventing the holding portion from coming into contact with the shim and affecting the positioning of the shim.

[0016] (4) In the manufacturing apparatus for a storage device described in any one of (1) to (3) above, the case may have a bottom on one side in a second direction that intersects with a first direction in which the storage unit and the shim are arranged, and the holding portion may hold the end of the shim on the one side in the second direction.

[0017] According to the manufacturing apparatus for an electricity storage device described in (4) above, the case has a bottom on one side in the second direction, and the holding part holds the end of the shim on one side in the second direction. In this way, the holding part holds the end of the shim on one side in the second direction (the bottom side of the case), thereby making it possible to stably hold the shim.

[0018] (5) In the manufacturing apparatus for a storage device described in any one of (1) to (4) above, the holding portion may hold the shim at a plurality of positions aligned in a third direction that intersects with a first direction in which the storage unit and the shim are aligned.

[0019] According to the manufacturing apparatus for an electricity storage device described in (5) above, the holding portion holds the shim at a plurality of positions aligned in the third direction, thereby making it possible to stably hold the shim.

[0020] (6) In the manufacturing apparatus for a power storage device described in any one of (1) to (5) above, the holding portion may be arranged adjacent to the shim in a direction intersecting a first direction in which the power storage unit and the shim are arranged, and may include a limiting portion that limits movement of the shim relative to the holding portion in a direction intersecting the first direction.

[0021] According to the manufacturing apparatus for an electric storage device described in (6) above, the holding unit includes a limiting unit that limits movement of the shim relative to the holding unit in a direction intersecting the first direction. That is, the holding unit uses the limiting unit to limit movement of the shim in that direction while holding the shim. This allows the holding unit to position and hold the shim, thereby improving the positioning accuracy of the shim.

[0022] (7) A manufacturing method for a storage device according to one aspect of the present invention is a manufacturing method for a storage device, the storage device comprising a storage unit having a storage element, a shim arranged adjacent to the storage unit, and a case that houses the storage unit and the shim, and the manufacturing method includes holding the shim in a holding portion that holds the storage unit.

[0023] According to the method for manufacturing an energy storage device according to one aspect of the present invention, the shim is held by a holder that holds the energy storage unit. In this way, when the holder holds the energy storage unit, the holder also holds the shim, so that the shim can be positioned relative to the energy storage unit. This makes it possible to prevent the shim from shifting position when manufacturing the energy storage device.

[0024] Hereinafter, with reference to the drawings, a description will be given of an energy storage device, an energy storage device manufacturing apparatus, and an energy storage device manufacturing method according to embodiments (including variations thereof) of the present invention. The embodiments described below all show comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, manufacturing processes, and the order of manufacturing processes shown in the following embodiments are examples and are not intended to limit the present invention. In each drawing, dimensions and the like are not strictly illustrated. In each drawing, the same or similar components are designated by the same reference numerals.

[0025] In the following description and drawings, the X-axis direction is defined as the short-side direction of the energy storage device, the opposing direction of a pair of long sides of the case for the energy storage device, the arranging direction of a pair of terminals of the energy storage element, or the opposing direction of a pair of short sides of the container for the energy storage element. The Y-axis direction is defined as the long-side direction of the energy storage device, the opposing direction of the pair of short sides of the case for the energy storage device, the arranging direction of the energy storage unit and the shim, the arranging direction of multiple energy storage elements or multiple spacers, the arranging direction of the energy storage element and spacers, the thickness direction of the shim, the thickness direction (flattening direction) of the energy storage element or spacer, or the opposing direction of the pair of long sides of the container for the energy storage element. The Z-axis direction is defined as the arranging direction of the case body and the lid of the case for the energy storage device, the arranging direction of the opening of the case body and the bottom, the arranging direction of the energy storage unit and the shim and the bottom of the case, the protruding direction of the terminals of the energy storage element, the arranging direction of the container body and the container lid for the energy storage element, or the up-and-down direction. The X-axis, Y-axis, and Z-axis directions intersect with each other (orthogonal in this embodiment). Depending on the mode of use, the Z-axis direction may not be the up-down direction, but for the sake of convenience, the following description will be given assuming that the Z-axis direction is the up-down direction.

[0026] In the following description, the positive X-axis direction refers to the direction of the X-axis arrow, and the negative X-axis direction refers to the direction opposite to the positive X-axis direction. The X-axis direction simply refers to both or either of the positive and negative X-axis directions. The terms one side and the other side of the X-axis direction refer to one and the other of the positive and negative X-axis directions. Unless otherwise specified, the center and end portions of a component in the X-axis direction refer to the central and end portions when the component is divided into thirds along the X-axis. The same applies to the Y-axis and Z-axis directions. Hereinafter, the Y-axis direction will also be referred to as the first direction, the Z-axis direction as the second direction, and the X-axis direction as the third direction. Expressions indicating relative directions or orientations, such as "parallel" and "orthogonal," may also refer to cases where the directions are not strictly those directions or orientations. Two directions being parallel (or orthogonal) not only means that the two directions are completely parallel (or orthogonal) but also means that the two directions are substantially parallel (or orthogonal), i.e., there is a difference of, for example, a few percent. In the following explanation, the term "insulation" means "electrical insulation." The volume resistivity of an insulating material is 1×10 6 Ωm or more is preferable, and 1×10 7 Ωm or more is preferable, and 1×10 10 More preferably, it is Ωm or more.

[0027] (Embodiment) [1. Description of the Energy Storage Device 1] First, a schematic configuration of an energy storage device 1 according to the present embodiment will be described. FIG. 1 is a perspective view showing the configuration of the energy storage device 1 according to the present embodiment. FIG. 1 shows the energy storage device 1 in a state where a lid 420 is removed from a case body 410 of a case 400. As a result, FIG. 1 illustrates a portion of the energy storage unit 10 and the shim 300 disposed inside the case 400. FIG. 2 is an exploded perspective view showing the energy storage elements 100 and spacers 200 of the energy storage unit 10 provided in the energy storage device 1 according to the present embodiment, as well as the shim 300. FIG. 2 disassembles the components provided in the energy storage unit 10, illustrating two energy storage elements 100 and three spacers 200 (two spacers 200a and one spacer 200b) located at the end of the energy storage unit 10 in the negative Y-axis direction, as well as the shim 300.

[0028] The power storage device 1 is a device that can charge with electricity from an external source and discharge electricity to an external source. The power storage device 1 is used for power storage purposes, power supply purposes, etc. The power storage device 1 is used as a battery for driving or starting the engine of a moving object such as an automobile, a motorcycle, a personal watercraft, a ship, a snowmobile, an agricultural machine, a construction machine, an automatic guided vehicle (AGV), or a rolling stock for an electric railway. Examples of the automobile include an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), and a fossil fuel (gasoline, diesel, liquefied natural gas, etc.) vehicle. Examples of the rolling stock for an electric railway include an electric train, a monorail, a linear motor car, and a hybrid electric train equipped with both a diesel engine and an electric motor. The power storage device 1 can also be used as a stationary battery for home or business use, etc.

[0029] 1, the energy storage device 1 includes an energy storage unit 10, a shim 300, and a case 400 that houses the energy storage unit 10 and the shim 300. The energy storage device 1 also includes external terminals (a positive external terminal and a negative external terminal) for electrically connecting to an external device, but these are not shown or described here. In addition to the above components, the energy storage device 1 may also include electrical devices such as a circuit board and a relay that monitor or control the charge state and discharge state of the energy storage unit 10.

[0030] The energy storage unit 10 is a battery module (battery assembly) including a plurality of energy storage elements 100. The energy storage unit 10 has a generally rectangular parallelepiped shape that is elongated in the Y-axis direction (first direction) by arranging the plurality of energy storage elements 100 and spacers 200 alternately in the Y-axis direction (first direction). The rectangular parallelepiped here refers to a hexahedron with all faces formed of rectangles or squares. The same applies below. The energy storage unit 10 includes a plurality of energy storage elements 100 and a plurality of spacers 200 (200a, 200b). The energy storage unit 10 also includes bus bars that connect the energy storage elements 100 in series or in parallel, a bus bar frame that holds the bus bars, and bus bars that connect the energy storage elements 100 to external terminals, but these are not shown in the drawings. The bus bars may connect all of the energy storage elements 100 in series, or may connect some of the energy storage elements 100 in parallel and then connect them in series, or may connect all of the energy storage elements 100 in parallel. The energy storage unit 10 is a non-constraint type module that does not include any constraint members (end plates, side plates, etc.) that constrain the plurality of energy storage elements 100 and spacers 200 in the Y-axis direction.

[0031] The energy storage element 100 is a secondary battery (single cell) capable of charging and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. The energy storage element 100 has a rectangular parallelepiped shape (square, rectangular) that is flattened in the Y-axis direction. In this embodiment, a plurality of energy storage elements 100 are arranged side by side in the Y-axis direction. However, the number of arranged energy storage elements 100 is not particularly limited and may be one, several tens of elements, or more. The size and shape of the energy storage element 100 are also not particularly limited and may be an elongated cylinder, an elliptical cylinder, a cylindrical shape, a polygonal pillar shape other than a rectangular parallelepiped, or the like. The energy storage element 100 is not limited to a non-aqueous electrolyte secondary battery and may be a secondary battery other than a non-aqueous electrolyte secondary battery or a capacitor. The energy storage element 100 may be a primary battery instead of a secondary battery. The energy storage element 100 may be a battery using a solid electrolyte. The energy storage element 100 may be a pouch-type energy storage element.

[0032] The spacer 200 is a member that is flat in the Y-axis direction and is arranged alongside the energy storage element 100 in the Y-axis direction, insulating and / or thermally insulating the energy storage element 100 from other components. The spacer 200 is an insulating or thermally insulating plate that is arranged in the positive or negative Y-axis direction of the energy storage element 100, and that insulates and / or thermally insulating the energy storage elements 100 from each other, or from the energy storage element 100 to the shim 300 or the case 400. The spacer 200 has wall portions on both sides of the energy storage element 100 in the X-axis direction and on both sides of the energy storage element 100 in the Z-axis direction, thereby holding the energy storage element 100 and functioning as a holder that positions the energy storage element 100. The spacer 200 has flow paths through which a refrigerant (a fluid such as air) flows, and thus also functions to cool the energy storage element 100.

[0033] The spacer 200 is formed from an insulating material such as polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), polyamide (PA), ABS resin, or a composite material thereof, or a heat-insulating material such as mica.

[0034] Hereinafter, the spacers 200 arranged between two energy storage elements 100 (spacers 200 other than those at both ends of the energy storage unit 10 in the Y-axis direction) will also be referred to as spacers 200a. The spacers 200a are arranged opposite the two energy storage elements 100. The spacers 200 arranged at both ends of the energy storage unit 10 in the Y-axis direction (between the energy storage elements 100 at the ends and the shim 300 or the case 400) will also be referred to as spacers 200b. The spacers 200b in the negative Y-axis direction are arranged opposite the energy storage elements 100 at the ends in the negative Y-axis direction and the shim 300. The spacers 200b in the positive Y-axis direction are arranged opposite the energy storage elements 100 at the ends in the positive Y-axis direction and the side wall of the case 400. The spacers 200 (spacers 200a, 200b) are arranged alternately with the energy storage elements 100. FIG. 2 shows a configuration in which two energy storage elements 100, two spacers 200a, and one spacer 200b are alternately arranged, but the other spacers 200a and 200b are also alternately arranged with the energy storage elements 100 in a similar manner.

[0035] Specifically, as shown in FIG. 2 , the spacer 200a is an intermediate spacer (intermediate holder, middle holder) that has wall portions on both sides in the X-axis direction and on both sides in the Z-axis direction of two energy storage elements 100 arranged on both sides of the spacer 200a in the Y-axis direction, and that holds the two energy storage elements 100. The spacer 200b is an end spacer (end holder) that has wall portions on both sides in the X-axis direction and on both sides in the Z-axis direction of one energy storage element 100 arranged on one side of the spacer 200b in the Y-axis direction, and that holds the one energy storage element 100. In other words, the energy storage element 100 located at the end of the energy storage unit 10 in the Y-axis direction is held by the spacer 200a and the spacer 200b. The other energy storage elements 100 are held by the two spacers 200a. In this way, the spacer 200a has a double-sided support configuration that supports two energy storage elements 100 on both sides in the Y-axis direction, and the spacer 200b has a single-sided support configuration that supports one energy storage element 100 on only one side in the Y-axis direction. The spacer 200a may have a single-sided support structure. All of the spacers 200 (spacers 200a, 200b) may be made of the same material, or any of the spacers 200 may be made of a different material.

[0036] In this embodiment, all of the spacers 200 (spacers 200a, 200b) are connected or fixed to each other so that adjacent spacers 200 are connected or fixed to each other. The energy storage unit 10 is compressed by a constant pressure load by the shim 300 inside the case 400 (case body 410). As a result, the entire energy storage unit 10 is fixed to the case 400 (case body 410).

[0037] The shim 300 is a plate-like, substantially rectangular member disposed adjacent to the energy storage unit 10. The shim 300 is disposed alongside the energy storage unit 10 in the Y-axis direction (first direction). The shim 300 is disposed facing the energy storage unit 10 (the spacer 200b in the negative Y-axis direction) in the negative Y-axis direction of the energy storage unit 10, and is a member (shim) that compresses the energy storage unit 10 at a constant pressure in the Y-axis direction. The shim 300 is formed of a metal member such as iron, stainless steel, or plated steel plate, but may also be formed of a non-metallic member with high strength (hardness). In this embodiment, the shim 300 is formed of a material that is attracted to a magnet, such as a magnetic material (ferromagnetic material). In this embodiment, the shim 300 is formed of a single shim, but may also be formed of multiple shims. The thickness of one shim in the Y-axis direction is approximately 0.3 mm to 5 mm, preferably approximately 0.5 mm to 3.5 mm. The thickness and number of shims constituting the shim 300 are appropriately changed depending on the amount of compression of the electricity storage unit 10 in the Y-axis direction when the electricity storage unit 10 is compressed at a constant pressure in the Y-axis direction.

[0038] The case 400 is a substantially rectangular parallelepiped (box-shaped) container (module case) that constitutes the exterior body (housing, outer shell) of the energy storage device 1. The case 400 is arranged outside the energy storage unit 10 and the shim 300, fixes the energy storage unit 10 and the like in predetermined positions, and protects them from impacts and the like. The case 400 is a metal case made of a metal member such as aluminum, aluminum alloy, stainless steel, iron, or plated steel sheet. In this embodiment, the case 400 is formed (integrally molded) by die-casting aluminum (aluminum die-casting). The case 400 may be made of an insulating member such as any resin material that can be used for the spacer 200 included in the energy storage unit 10.

[0039] 1, case 400 includes case main body 410 constituting the main body of case 400, and lid body 420 constituting the lid of case 400. Case main body 410 is a housing (casing) with an opening 410a formed in the positive direction of the Z axis, and accommodates power storage unit 10 and shim 300. A bottom portion (bottom wall portion) of case main body 410 located at the end in the negative direction of the Z axis is referred to as bottom portion 411, and a side portion (side wall portion) of case main body 410 located at the end in the negative direction of the Y axis is referred to as side portion 412.

[0040] The bottom 411 is a portion of the case 400 (case main body 410) that is arranged on one side in the Z-axis direction (second direction) that intersects with the Y-axis direction (first direction) that is the arrangement direction of the power storage units 10 and the shim 300. The bottom 411 is a portion of the case 400 (case main body 410) that is arranged on one side in the Z-axis direction (second direction) that intersects with the Y-axis direction (first direction) that is the arrangement direction of the power storage units 10 and the shim 300. The bottom 411 is arranged in the Z-axis direction of the power storage unit 10 so as to cover the entire surface of the power storage unit 10 in the Z-axis direction, and supports the power storage unit 10 from the Z-axis direction. The bottom 411 is arranged adjacent to the side portion 412.

[0041] The side portion 412 is a portion of the case 400 (case main body 410) that is disposed in the negative Y-axis direction (one side in the first direction). The side portion 412 is a short side wall (short side wall of the case 400) of the case main body 410 in the negative Y-axis direction. The side portion 412 is disposed with its main surface (the surface with the largest area) facing the Y-axis direction, and is a flat, rectangular wall portion that is parallel to the XZ plane and forms a side surface (short side surface) of the case main body 410 in the negative Y-axis direction. The side portion 412 is a wall portion that rises in the positive Z-axis direction from the end of the bottom portion 411 in the negative Y-axis direction, and is disposed opposite the shim 300 in the Y-axis direction.

[0042] The lid 420 is a flat, rectangular member that closes the opening 410a of the case body 410. The opening 410a is a rectangular opening that is elongated in the Y-axis direction when viewed from the Z-axis direction and is disposed at a position opposite the bottom 411 of the case body 410. The opening 410a is large enough to allow the power storage unit 10 and the shim 300 to pass through in the Z-axis direction. After the power storage unit 10 and the shim 300 are inserted through the opening 410a of the case body 410, the case body 410 and the lid 420 are joined together by screwing with bolts or the like, welding, adhesive bonding, or the like. This results in the case 400 having a structure in which the interior is sealed (hermetically sealed). A terminal block for external terminals (positive external terminal and negative external terminal) may be attached to the case body 410, the lid 420, the spacer 200 (200b), or the like, and the external terminals may be disposed on the terminal block.

[0043] Next, the configurations of the energy storage devices 100, the spacers 200 (particularly the spacers 200b), and the shims 300 will be described in detail.

[0044] [1.1 Description of the energy storage element 100] Fig. 3 is a perspective view showing the configuration of an energy storage element 100 according to this embodiment. Fig. 3 shows an enlarged view of the energy storage element 100 shown in Fig. 2. Since the multiple energy storage elements 100 included in the energy storage unit 10 all have the same configuration, Fig. 3 shows one energy storage element 100, and the configuration of one energy storage element 100 will be described in detail below.

[0045] As shown in FIG. 3 , the energy storage device 100 includes a container 110 and a pair of terminals 140 (positive and negative electrodes). The container 110 contains an electrode assembly, a pair of current collectors (positive and negative electrodes), and an electrolyte (non-aqueous electrolyte). Gaskets are disposed between the terminals 140 and the current collectors and the container 110, but these are not shown in the figure (the gaskets are only partially shown). The type of electrolyte is not particularly limited as long as it does not impair the performance of the energy storage device 100, and various types can be selected. The gasket may be made of any insulating material. In addition to the above-mentioned components, the energy storage device 100 may also include spacers disposed on the sides of the electrode assembly, insulating films encasing the electrode assembly, and insulating films (such as shrink tubes) covering the outer surface of the container 110.

[0046] The container 110 is a rectangular parallelepiped (square or box-shaped) case including a container body 120 with an opening formed therein and a container lid 130 that closes the opening of the container body 120. The container body 120 is a rectangular cylindrical member with a bottom that constitutes the main body of the container 110, and has an opening formed on the positive side of the Z axis. The container lid 130 is a rectangular plate-like member that is elongated in the X axis direction and constitutes the lid of the container 110, and is disposed in the positive direction of the Z axis of the container body 120. The container lid 130 is provided with a gas exhaust valve 131 that releases pressure inside the container 110 when the pressure inside the container 110 increases excessively, a liquid injection part (not shown) for injecting electrolyte into the container 110, and the like. The material of the container 110 (the container body 120 and the container lid 130) is not particularly limited and can be a weldable (joinable) metal such as stainless steel, aluminum, aluminum alloy, iron, or plated steel sheet, but resin can also be used.

[0047] After the electrode assembly and the like are housed inside the container body 120, the container body 120 and the container lid 130 are joined by welding or the like, thereby sealing the interior of the container 110. The container 110 has a pair of long sides 111 on both sides in the Y-axis direction, a pair of short sides 112 on both sides in the X-axis direction, and a bottom surface 113 in the negative Z-axis direction. The long sides 111 are rectangular flat portions that form the long sides of the container 110 and are arranged opposite adjacent spacers 200 in the Y-axis direction. The long sides 111 are adjacent to the short sides 112 and the bottom surface 113 and have a larger area than the short sides 112. The short sides 112 are rectangular flat portions that form the short sides of the container 110 and are arranged opposite the wall portions of the spacers 200 and the case 400 in the X-axis direction. The short sides 112 are adjacent to the long sides 111 and the bottom surface 113 and have a smaller area than the long sides 111. The bottom surface 113 is a rectangular flat portion that forms the bottom surface of the container 110, and is disposed opposite the wall portion of the spacer 200 and the bottom portion 411 of the case 400 in the Z-axis direction. The bottom surface 113 is disposed adjacent to the long side surface 111 and the short side surface 112.

[0048] The terminals 140 are electrode terminals (positive and negative terminals) of the energy storage element 100 and are arranged on the container lid 130. The terminals 140 are arranged protruding from the upper surface (terminal arrangement surface) of the container lid 130 in the positive direction of the Z axis. The terminals 140 are electrically connected to the positive and negative electrode plates of the electrode assembly via current collectors. The terminals 140 are metal members that conduct electricity stored in the electrode assembly to the external space of the energy storage element 100 and introduce electricity into the internal space of the energy storage element 100 to store electricity in the electrode assembly. The terminals 140 are made of aluminum, an aluminum alloy, copper, a copper alloy, or the like.

[0049] The electrode assembly is an electricity storage element (power generating element) formed by stacking a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is a positive electrode current collector foil, which is a metal foil made of a metal such as aluminum or an aluminum alloy, on which a positive electrode active material layer is formed. The negative electrode plate is a negative electrode current collector foil, which is a metal foil made of a metal such as copper or a copper alloy, on which a negative electrode active material layer is formed. As the active material used in the positive electrode active material layer and the negative electrode active material layer, any known material capable of absorbing and releasing charge-transporting ions can be used. The separator can be a microporous resin sheet or nonwoven fabric. In this embodiment, the electrode assembly is formed by stacking electrode plates (positive electrode plates and negative electrode plates) in the Y-axis direction. The electrode assembly may be of any shape, such as a wound electrode assembly formed by winding electrode plates (positive electrode plates and negative electrode plates), a stacked electrode assembly formed by stacking multiple flat electrode plates, or a bellows-shaped electrode assembly in which electrode plates are folded in an accordion-like shape.

[0050] The current collectors are conductive current collecting members (positive and negative current collectors) that are electrically and mechanically connected to the terminal 140 and the electrode body. The positive current collector is made of aluminum or an aluminum alloy, etc., like the positive current collector foil of the positive electrode plate of the electrode body, and the negative current collector is made of copper or a copper alloy, etc., like the negative current collector foil of the negative electrode plate of the electrode body.

[0051] 1.2 Description of spacer 200b Next, the configuration of spacer 200b of spacer 200 will be described in detail. Fig. 4 is a perspective view showing the configuration of spacer 200 (spacer 200b) according to this embodiment. Fig. 4 shows an enlarged view of spacer 200b located at the end in the negative Y-axis direction of energy storage unit 10 shown in Fig. 2. Since the two spacers 200b located at both ends in the Y-axis direction of energy storage unit 10 have the same configuration, only spacer 200b located at the end in the negative Y-axis direction will be illustrated below, and the configuration of spacer 200b will be described in detail.

[0052] 4, the spacer 200b has a shape in which the positive half of the spacer 200b in the X-axis direction and the negative half of the spacer 200b in the X-axis direction have the same shape. In other words, the spacer 200b has a shape that is symmetrical with respect to a plane that passes through the center position and is parallel to the YZ plane. The spacer 200b includes a spacer main body 210, a spacer wall 220, a spacer protrusion 230, and a pair of legs 240.

[0053] The spacer main body 210 is a flat, rectangular portion that constitutes the main body of the spacer 200b and is disposed parallel to the XZ plane. The spacer main body 210 is disposed in the negative Y-axis direction of the energy storage element 100 that is located at the end of the energy storage unit 10 in the negative Y-axis direction. The spacer main body 210 is disposed opposite the long side surface 111 in the Y-axis direction of the container 110 of the energy storage element 100, covering the entire surface of the long side surface 111 that faces the spacer main body 210, and in contact with the long side surface 111. The surface of the spacer main body 210 in the positive Y-axis direction is provided with a plurality of protrusions (not shown) that form flow paths for a refrigerant (gas such as air or liquid, etc.) that flows between the spacer main body 210 and the energy storage element 100.

[0054] The spacer wall portions 220 are walls arranged on both sides in the Z-axis direction and both sides in the X-axis direction of the energy storage element 100. The spacer wall portions 220 include spacer wall portions 221 (see FIG. 6A ) arranged on both sides in the Z-axis direction at both ends of the X-axis direction of the energy storage element 100, and spacer wall portions 222 arranged on both sides in the X-axis direction at both ends of the Z-axis direction of the energy storage element 100. The spacer wall portions 221 are flat plate-shaped portions parallel to the XY plane protruding in the positive direction of the Y-axis from both Z-axis direction end edges at both ends of the spacer main body portion 210 in the X-axis direction, and are arranged opposite the container lid portion 130 and the bottom surface 113 of the container 110 of the energy storage element 100 in the Z-axis direction. The spacer wall portions 222 are flat plate-shaped portions parallel to the YZ plane protruding in the positive direction of the Y-axis from both X-axis direction end edges at both ends of the spacer main body portion 210 in the Z-axis direction, and are arranged opposite a pair of short side surfaces 112 of the container 110 of the energy storage element 100 in the X-axis direction. In this way, the spacer walls 220 (221 and 222) are arranged to cover the four corners located at both ends in the Z-axis direction and both ends in the X-axis direction of the energy storage device 100. In this way, the spacer 200b holds the energy storage device 100.

[0055] The spacer protrusion 230 is a protrusion that protrudes from the spacer main body 210 in the negative direction of the Y axis. The spacer protrusion 230 protrudes toward the shim 300. The spacer protrusion 230 is disposed facing the shim 300 in the Y axis direction and in contact with the shim 300. The spacer protrusion 230 is a portion of the energy storage unit 10 that receives a constant pressure load from the shim 300. In this embodiment, five spacer protrusions 230 that protrude from the spacer main body 210 in the negative direction of the Y axis are arranged side by side at intervals in the X axis direction. The five spacer protrusions 230 are also referred to as spacer protrusion 231, spacer protrusion 232, spacer protrusion 233, spacer protrusion 234, and spacer protrusion 235, in that order, from the spacer protrusion 230 at the end in the positive direction of the X axis to the spacer protrusion 230 at the end in the negative direction of the X axis.

[0056] The spacer protrusions 230 (231 to 235) are protrusions that protrude in the negative Y-axis direction from the surface of the spacer main body 210 facing in the negative Y-axis direction and are long in the Z-axis direction. The spacer protrusions 230 (231 to 235) have a plurality of recesses that are recessed in the surface facing in the negative Y-axis direction and are arranged side by side in the Z-axis direction (and the X-axis direction), but the arrangement position and number of the recesses are not limited. During manufacturing of the energy storage device 1, a manufacturing device for the energy storage device 1 is inserted into the gaps between the spacer protrusions 230 (231 to 235) to hold the energy storage unit 10, and the energy storage unit 10 is inserted into the case 400 (case main body 410) in a state where the energy storage unit 10 is compressed in the Y-axis direction.

[0057] The pair of legs 240 are protrusions (convex portions) that protrude in the negative Z-axis direction from both ends in the X-axis direction at the negative Z-axis direction ends of the spacer main body 210 and extend in the Y-axis direction. The pair of legs 240 are legs of the spacer 200b, and are placed on the bottom 411 of the case 400 to support the spacer 200b relative to the case 400. The number, shape, size, etc. of the legs 240 are not particularly limited as long as they are configured to support the spacer 200b.

[0058] [1.3 Explanation of Sim 300] Next, the configuration of the shim 300 and the positional relationship between the shim 300, the energy storage unit 10 (spacer 200b), and the case 400 (case main body 410) will be described in detail. FIG. 5 is a perspective view showing the configuration of the shim 300 according to this embodiment. FIG. 5 shows an enlarged view of the shim 300 shown in FIG. 2. FIG. 6A is a cross-sectional view showing the positional relationship between the shim 300, the energy storage unit 10 (spacer 200b), and the case 400 (case main body 410) according to this embodiment. FIG. 6A shows a cross-section of the configuration in which the energy storage unit 10 and the shim 300 are arranged in the case main body 410 shown in FIG. 1, taken along a plane that includes a via-via line located between the spacer protrusions 232 and 233 and is parallel to the YZ plane. FIG. 6B is a cross-sectional view showing the configuration around the shim end 330 of the shim 300 according to this embodiment. FIG. 6B shows an enlarged view of the configuration around the shim end 330 of the shim 300 shown in FIG. 6A.

[0059] As shown in FIG. 5, the shim 300 includes a shim main body 310, a shim protruding portion 320, and a shim end portion 330.

[0060] The shim main body 310 is a flat, rectangular portion constituting the main body of the shim 300 and is disposed parallel to the XZ plane. The shim main body 310 is a flat portion oriented in the Y-axis direction with a constant thickness in the Y-axis direction. As shown in FIG. 6A , the shim main body 310 is disposed in the negative Y-axis direction of the energy storage unit 10 and is in contact with the energy storage unit 10. Specifically, the shim main body 310 is disposed in the negative Y-axis direction of the spacer protrusion 230 of the spacer 200b included in the energy storage unit 10 so as to cover almost the entire surface of the spacer protrusion 230 when viewed from the Y-axis direction. The shim main body 310 is disposed opposite the spacer protrusion 230 in the Y-axis direction and in contact with the spacer protrusion 230. The shim main body 310 is disposed in the positive Y-axis direction of the side portion 412 of the case body 410 and is disposed opposite the side portion 412 in the Y-axis direction and in contact with the side portion 412. As a result, the shim main body 310 is disposed between the spacer protruding portion 230 of the spacer 200b and the side portion 412 of the case main body 410, in a state where it is sandwiched between the spacer protruding portion 230 and the side portion 412.

[0061] The shim protrusion 320 is a protrusion that protrudes from the shim main body 310 in the positive direction of the Z axis (the other side in the second direction). The shim protrusion 320 is a substantially rectangular, flat portion when viewed in the Y axis direction. Two shim protrusions 320 are disposed protruding in the positive direction of the Z axis from both ends of the shim main body 310 in the X axis direction. That is, the shim 300 includes two shim protrusions 320 aligned in the X axis direction (a third direction intersecting the first and second directions). As shown in FIG. 6A , the shim protrusion 320 protrudes in the positive direction of the Z axis further than the spacer protrusion 230 of the spacer 200b and further than the side portion 412 of the case main body 410. That is, the shim protrusion 320 protrudes in the positive direction of the Z axis from between the energy storage unit 10 (spacer 200b) and the case main body 410 (side portion 412). Shim protrusion 320 is used as a portion to be grasped by a manufacturing device for power storage device 1 when shim 300 is transported during the manufacture of power storage device 1.

[0062] The shim end 330 is a portion of the shim main body 310 that is located in the negative Z-axis direction (one side in the second direction). The shim end 330 is a portion of the shim 300 that extends in the X-axis direction and is located at the end of the shim 300 in the negative Z-axis direction. As shown in FIGS. 6A and 6B , the shim end 330 does not contact the energy storage unit 10. That is, the portion of the end of the shim 300 in the negative Z-axis direction that does not contact the energy storage unit 10 is referred to as the shim end 330. Specifically, the shim end 330 is located at a position that does not face the spacer protrusion 230 in the Y-axis direction, and is thereby located out of contact with the spacer protrusion 230. The shim end 330 is located so as to protrude from the spacer protrusion 230 in the negative Z-axis direction. The shim end 330 is located in the positive Y-axis direction of the side 412 of the case main body 410, faces the side 412 in the Y-axis direction, and is in contact with the side 412. The shim end 330 is disposed apart from the bottom 411 of the case body 410. This will be described in detail below.

[0063] As shown in FIGS. 6A and 6B , the bottom 411 includes a bottom wall 411a and a step portion 411b, and the step portion 411b includes a case end portion 411c. The bottom wall 411a is the bottom wall of the case main body 410 (case 400) and is disposed at the end of the bottom 411 in the negative Z-axis direction. The bottom wall 411a is a flat, rectangular wall portion that is parallel to the XY plane and elongated in the Y-axis direction, and is disposed with its main surface (the surface with the largest area) facing the Z-axis direction. The bottom wall 411a is disposed opposite the energy storage unit 10 in the Z-axis direction. The step portion 411b is disposed at the end of the bottom 411 in the negative Y-axis direction and is a stepped (step-like) portion that extends in the X-axis direction. The step portion 411b protrudes from the side portion 412 in the positive Y-axis direction and is disposed in the negative Z-axis direction of the shim 300. The bottom 411 may have a space that serves as a flow path for a refrigerant (gas such as air or liquid, etc.) that cools the storage element 100, and an opening (through hole) that connects the space to the outside of the case 400.

[0064] In this configuration, the step portion 411b is disposed at a distance from the shim end portion 330 of the shim 300. That is, the case end portion 411c located at the end portion of the step portion 411b in the positive Z-axis direction is disposed at a distance from the shim end portion 330. The case end portion 411c is a connecting portion of the bottom portion 411 with the side portion 412. The case end portion 411c is a corner portion of the inner surface of the bottom portion 411 of the case 400 (case main body 410). The case end portion 411c is an end portion (an end portion in the negative Z-axis direction) of the case 400 (case main body 410) on one side in the Z-axis direction (a second direction) that intersects with the Y-axis direction (a first direction) in which the power storage unit 10 and the shim 300 are arranged. The surface of the case end portion 411c in the positive Z-axis direction has an inclined surface that inclines in the positive Z-axis direction as it approaches the negative Y-axis direction (a curved surface that curves in the positive Z-axis direction). That is, a rounded portion (corner radius) is formed on case end portion 411c, which is the connecting portion of bottom portion 411 with side portion 412.

[0065] In this way, the shim end 330 faces the case end 411c in the Z-axis direction (second direction) and is disposed at a distance from the case end 411c. In other words, the shim 300 is disposed at a distance from the bottom 411 of the case 400. This prevents the shim 300 (shim end 330) from coming into contact with the rounded portion of the bottom 411 (case end 411c).

[0066] [2. Description of Manufacturing Apparatus 2 for Energy Storage Device 1] [2.1 Description of the Configuration of the Manufacturing Apparatus 2 for the Energy Storage Device 1] Next, the configuration of the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment will be described. FIG. 7 is a perspective view showing the configuration of the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment. FIG. 7 shows the configuration of a holding unit 20 included in the manufacturing apparatus 2. FIG. 8 is a perspective view showing the configuration in a state in which the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment holds the energy storage unit 10. FIG. 8 shows a state in which the holding unit 20 included in the manufacturing apparatus 2 holds the spacer 200b, with components other than the spacer 200b included in the energy storage unit 10 not shown. FIG. 9 is a perspective view showing the configuration in a state in which the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment holds the energy storage unit 10 and the shim 300. FIG. 9 shows a state in which the holding unit 20 included in the manufacturing apparatus 2 further holds the shim 300 in the configuration shown in FIG. 8. FIG. 10 is a front view showing the configuration in which the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment holds the energy storage unit 10 and the shim 300. Fig. 10 shows the configuration of the holder main body 21 of the holder 20, the energy storage unit 10, and the shim 300 in the configuration shown in Fig. 9 when viewed from the negative Y-axis direction. Fig. 11 is a cross-sectional view showing the configuration in a state where the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment is holding the energy storage unit 10 and the shim 300. Fig. 11 shows a cross section of the configuration shown in Fig. 10 taken along a plane that includes line XI-XI located between the spacer protrusions 232 and 233 and is parallel to the YZ plane.

[0067] As shown in FIG. 7 and other figures, the manufacturing apparatus 2 for the energy storage device 1 includes a holding section 20. The holding section 20 is a section of the manufacturing apparatus 2 that holds the energy storage unit 10, and is disposed in the negative Y-axis direction of the energy storage unit 10. The holding section 20 also holds the shim 300. The holding section 20 is formed of a metal member such as steel, iron, aluminum, an aluminum alloy, or stainless steel. The holding section 20 includes a holding section main body section 21 and a holding section opposing section 23.

[0068] The holder main body 21 is a part that constitutes the main body of the holder 20, extends in the negative Z-axis direction at the end of the holder 20 in the positive Y-axis direction, and is disposed parallel to the XZ plane. As shown in FIGS. 8 and 9, the holder main body 21 is disposed in the negative Y-axis direction of the power storage unit 10 (spacer 200b) and in the positive Y-axis direction of the shim 300, and is thereby disposed between the power storage unit 10 (spacer 200b) and the shim 300 in the Y-axis direction. As shown in FIG. 11, the holder main body 21 is in contact with the spacer main body 210 of the spacer 200b in the Y-axis direction and is disposed apart from the shim 300. The holder main body 21 includes a limiting portion 30 and a holder protrusion 22 on which a magnet 40 is provided.

[0069] The limiting portion 30 is disposed adjacent to the shim 300 in a direction intersecting the Y-axis direction (first direction) in which the power storage unit 10 and the shim 300 are arranged, and limits movement of the shim 300 in the direction intersecting the Y-axis direction (first direction) relative to the manufacturing apparatus 2 (holding portion 20). In this embodiment, as shown in Fig. 9 and Fig. 10 , the limiting portion 30 is disposed adjacent to the shim protrusion portion 320 of the shim 300 in the direction intersecting the Y-axis direction, and limits movement of the shim 300 in the direction intersecting the Y-axis direction relative to the manufacturing apparatus 2 (holding portion 20).

[0070] The limiting portion 30 is a cylindrical portion (positioning pin) that protrudes in the negative Y-axis direction from the surface of the holder main body 21 facing the negative Y-axis direction. In this embodiment, the limiting portion 30 is formed separately from the holder main body 21 and fixed to the holder main body 21 by screwing or press-fitting. The limiting portion 30 is formed of a metal member such as stainless steel. The limiting portion 30 may be formed of a member made of the same material as the holder main body 21, or may be formed of a member made of a different material. The limiting portion 30 may be formed integrally with the holder main body 21. The size and shape of the limiting portion 30 are not particularly limited. The number of limiting portions 30 is also not limited, but in this embodiment, four limiting portions 30 are arranged: first limiting portions 31 and 32, second limiting portion 33, and third limiting portion 34.

[0071] The first limiting portions 31 and 32 are disposed in the positive direction of the Z axis (the other side in the second direction) of the shim 300 and limit movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction) relative to the manufacturing apparatus 2 (holding unit 20). Specifically, as shown in FIGS. 9 and 10 , the first limiting portions 31 and 32 are disposed in the positive direction of the Z axis (the other side in the second direction) of two shim protrusions 320 provided on the shim 300 and limit movement of the shim 300 in the positive direction of the Z axis relative to the holding unit 20. The first limiting portion 31 is disposed at the end of the holding unit main body 21 in the positive direction of the X axis and is disposed in the positive direction of the Z axis of the shim protrusion 320 in the negative direction of the X axis of the two shim protrusions 320. The first limiting portion 32 is disposed at the end of the holding unit main body 21 in the negative direction of the X axis and is disposed in the positive direction of the Z axis of the shim protrusion 320 in the negative direction of the X axis of the two shim protrusions 320. In this embodiment, the shim 300 is arranged so that the two shim protrusions 320 are in contact with the first limiting portions 31 and 32 in the Z-axis direction, but may be arranged with a gap therebetween.

[0072] The second limiting portion 33 is disposed in the negative X-axis direction of the shim 300 (on one side of a third direction intersecting the first and second directions) and limits movement of the shim 300 in the negative X-axis direction (on one side of the third direction) relative to the manufacturing apparatus 2 (holding unit 20). Specifically, as shown in FIGS. 9 and 10 , the second limiting portion 33 is disposed in the negative X-axis direction of the shim protrusion 320 in the positive X-axis direction, of the two shim protrusions 320 provided on the shim 300, and limits movement of the shim 300 in the negative X-axis direction relative to the holding unit 20. The second limiting portion 33 is disposed in the negative Z-axis direction and the negative X-axis direction relative to the first limiting portion 31. In this embodiment, the shim protrusion 320 in the positive X-axis direction is disposed with a gap between it and the second limiting portion 33 in the X-axis direction, but may be disposed in contact with it.

[0073] The third limiting portion 34 is disposed in the positive X-axis direction of the shim 300 (the other side in the third direction) and limits movement of the shim 300 in the positive X-axis direction (the other side in the third direction) relative to the manufacturing apparatus 2 (holding unit 20). Specifically, as shown in FIGS. 9 and 10 , the third limiting portion 34 is disposed in the positive X-axis direction of the shim protruding portion 320 of the two shim protruding portions 320 provided on the shim 300 that is in the negative X-axis direction, and limits movement of the shim 300 in the positive X-axis direction relative to the holding unit 20. The third limiting portion 34 is disposed in the negative Z-axis direction and the positive X-axis direction relative to the first limiting portion 32. In this embodiment, the shim protruding portion 320 in the negative X-axis direction of the shim 300 is disposed with a gap between it and the third limiting portion 34 in the X-axis direction, but may be disposed in contact with it. In this way, the second limiting portion 33 and the third limiting portion 34 are disposed between (inside) the two shim protruding portions 320, and limit the movement of the shim 300 relative to the holder 20 in both directions in the X-axis direction.

[0074] The holder protrusion 22 is a portion of the holder main body 21 that protrudes in the negative Z-axis direction from the end of the holder main body 21 in the positive Z-axis direction. The holder protrusion 22 is a plate-like portion that extends in the Z-axis direction and is flat in the X-axis direction, and has a shape in which the end in the negative Z-axis direction is smaller in width in the X-axis direction than the end in the positive Z-axis direction. In this embodiment, four holder protrusions 22 are arranged side by side at intervals in the X-axis direction. These four holder protrusions 22 are also referred to as holder protrusion 22a, holder protrusion 22b, holder protrusion 22c, and holder protrusion 22d, in order, from the holder protrusion 22 at the end in the positive X-axis direction to the holder protrusion 22 at the end in the negative X-axis direction.

[0075] As shown in FIG. 8, the holder protrusion 22 is disposed (inserted) between two spacer protrusions 230 in the X-axis direction. Specifically, the holder protrusion 22a is disposed (inserted) between the spacer protrusions 231 and 232. The holder protrusion 22b is disposed (inserted) between the spacer protrusions 232 and 233. The holder protrusion 22c is disposed (inserted) between the spacer protrusions 233 and 234. The holder protrusion 22d is disposed (inserted) between the spacer protrusions 234 and 235. As shown in FIGS. 8 and 11, the holder protrusions 22 (22a to 22d) have a smaller width in the Y-axis direction than the spacer protrusions 230 (231 to 235). As a result, the holder protrusions 22 (22a to 22d) are disposed at positions recessed in the positive direction of the Y-axis from the spacer protrusions 230 (231 to 235). The shim 300 is disposed in contact with the spacer protrusions 230 (231 to 235) in the Y-axis direction, and therefore the holder protrusions 22 (22a to 22d) are disposed spaced apart from the shim 300 in the Y-axis direction.

[0076] A magnet 40 is disposed at the end of the holder protrusion 22 in the negative Z-axis direction. As shown in FIGS. 7 and 11 , a recess recessed in the positive Y-axis direction is formed at the end of each of the holder protrusions 22 (22a to 22d) in the negative Z-axis direction, and the magnet 40 is inserted and fixed in the recess. In this embodiment, the cylindrical magnet 40 is inserted into the circular recess when viewed from the Y-axis direction and fixed by adhesive or press-fitting, but the shape, size, and fixing method of the recess and the magnet 40 are not particularly limited. Since the magnet 40 is disposed at the end of the holder protrusion 22 in the negative Z-axis direction, the magnet 40 faces the end of the shim 300 in the negative Z-axis direction. As described above, the shim 300 is formed of a material that adheres to the magnet 40. Therefore, the holder protrusion 22 (holder 20) holds the end of the shim 300 in the negative Z-axis direction (one side in the second direction) by the magnetic force of the magnet 40. It is preferable that the retaining portion protrusion 22 retains the portion at the end in the negative Z-axis direction when the total length of the shim 300 in the Z-axis direction is divided into thirds, more preferably retains the portion at the end in the negative Z-axis direction when the total length is divided into fourths, and even more preferably retains the portion at the end in the negative Z-axis direction when the total length is divided into fifths.

[0077] Since the multiple holder protrusions 22 (22a to 22d) are aligned in the X-axis direction, the multiple magnets 40 are aligned in the X-axis direction. In other words, the multiple magnets 40 aligned in the X-axis direction are disposed opposite the negative Z-axis side end of the shim 300 in the Y-axis direction. The holder 20 holds the negative Z-axis side end of the shim 300 by the magnetic force of the multiple magnets 40 aligned in the X-axis direction and provided on the multiple holder protrusions 22 (22a to 22d). In other words, the holder 20 holds the shim 300 at multiple locations aligned in the X-axis direction (third direction), which is a direction intersecting the Y-axis direction (first direction), which is the alignment direction of the power storage unit 10 and the shim 300.

[0078] The magnet 40 is disposed so that its surface facing the negative Y-axis is at the same position as the surface of the retaining portion protrusion 22 facing the negative Y-axis, or further in the positive Y-axis direction than the surface of the retaining portion protrusion 22 facing the negative Y-axis, so that it does not protrude from the retaining portion protrusion 22 in the negative Y-axis direction. As described above, the retaining portion protrusion 22 is disposed at a distance from the shim 300 in the Y-axis direction, and therefore the magnet 40 is also disposed at a distance from the shim 300 in the Y-axis direction. This allows the retaining portion protrusion 22 (retaining portion 20) to hold the shim 300 in a non-contact state between the retaining portion protrusion 22 (retaining portion 20). In other words, the magnet 40 attracts the shim 300 toward the retaining portion protrusion 22 in the positive Y-axis direction, bringing the shim 300 into contact with (attracts) the spacer protrusion 230. This causes the shim 300 to be disposed at a distance from the retaining portion protrusion 22 (magnet 40). The magnet 40 may protrude from the holder protrusion 22 in the negative Y-axis direction as long as it is spaced apart from the shim 300 in the Y-axis direction. The shape, size, number, and distance between the magnet 40 and the shim 300 may be changed as appropriate depending on the weight of the shim 300.

[0079] The holder facing portion 23 is a portion facing the holder main body 21 in the Y-axis direction, extends in the negative Z-axis direction at the end of the holder 20 in the negative Y-axis direction, and is disposed parallel to the XZ plane. As shown in FIG. 9 , the holder facing portion 23 includes a support portion 23a, which supports the shim 300 when the holder main body 21 holds the shim 300. The support portion 23a is a rod-shaped member extending in the Y-axis direction from the holder facing portion 23 toward the shim 300, and supports (holds) the shim 300 relative to the holder 20 by sandwiching the shim 300 in the Y-axis direction between the support portion 23a and the spacer protrusion 230 of the spacer 200b. The holder 20 does not need to include the holder facing portion 23 if the holder main body 21 can support (hold) the shim 300 without using the support portion 23a.

[0080] [2.2 Description of Manufacturing Method of Energy Storage Device 1] Next, a method for manufacturing the energy storage device 1 performed by the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment will be described. FIG. 12 is a cross-sectional view showing a configuration in which the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment compresses the energy storage unit 10 and inserts it together with the shim 300 into the case body 410. FIG. 12 shows a cross-section taken along the same plane as FIG. 11 (a plane parallel to the YZ plane located between the spacer protrusions 232 and 233) to show a configuration in which the holding section 20 included in the manufacturing apparatus 2 compresses the energy storage unit 10 and inserts it together with the shim 300 into the case body 410. FIG. 13 is a cross-sectional view showing a configuration in which the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment releases the compression of the energy storage unit 10. FIG. 13 shows a configuration in which the holding section 20 included in the manufacturing apparatus 2 releases the compression of the energy storage unit 10 from the state shown in FIG. 12.

[0081] First, the manufacturing apparatus 2 of the energy storage device 1 stacks a plurality of energy storage elements 100 and a plurality of spacers 200 (200a and 200b) to form the energy storage unit 10. The manufacturing apparatus 2 also includes a holding portion (not shown) in the positive Y-axis direction of the energy storage unit 10, which has a configuration similar to that of the holding portion 20. The holding portion in the positive Y-axis direction may not include the holding portion opposing portion 23, the limiting portion 30, and the magnet 40. The manufacturing apparatus 2 holds the energy storage unit 10 with the holding portion 20 and the holding portion in the positive Y-axis direction, and compresses the energy storage unit 10 in the Y-axis direction. In the energy storage element 100, the container 110 may bulge in the Y-axis direction depending on the electrode assembly housed therein and the amount and composition of the electrolyte. The spacer 200 may have a material and shape that allows elastic deformation. The manufacturing apparatus 2 compresses the bulging portions of the energy storage elements 100 included in the energy storage unit 10 and the elastically deformable portions of the spacers 200.

[0082] At this time, the manufacturing apparatus 2 holds the electricity storage unit 10 and the shim 300 by using the holder 20, as shown in FIGS. 8 to 11 . Specifically, as shown in FIG. 8 , the manufacturing apparatus 2 inserts the plurality of holder protrusions 22 provided on the holder main body 21 of the holder 20 between the plurality of spacer protrusions 230. Then, the manufacturing apparatus 2 transports the shim 300 and places it on the holder 20 by, for example, air-sucking the shim 300 or gripping the shim protrusions 320, so that the shim protrusions 320 of the shim 300 are placed at predetermined positions in the limiting portion 30, as shown in FIGS. 9 and 10 . The manufacturing apparatus 2 holds the shim 300 relative to the holder 20 by using the magnets 40 of the holder protrusions 22 (and the support portions 23 a of the holder opposing portions 23).

[0083] As described above, the manufacturing method of the energy storage device 1 includes disposing the limiting unit 30 included in the manufacturing apparatus 2 at a position adjacent to the shim 300 in a direction intersecting the Y-axis direction (first direction) and limiting movement of the shim 300 relative to the manufacturing apparatus 2 (holding unit 20) in the direction intersecting the Y-axis direction (first direction). Specifically, the manufacturing method of the energy storage device 1 includes disposing the first limiting units 31 and 32 included in the manufacturing apparatus 2 in the positive Z-axis direction of the shim 300 (the other side in the second direction) and limiting movement of the shim 300 in the positive Z-axis direction (the other side in the second direction) relative to the manufacturing apparatus 2. The manufacturing method of the energy storage device 1 includes disposing the second limiting unit 33 included in the manufacturing apparatus 2 in the negative X-axis direction of the shim 300 (one side in the third direction) and limiting movement of the shim 300 in the negative X-axis direction (one side in the third direction) relative to the manufacturing apparatus 2. The manufacturing method of the energy storage device 1 includes positioning the third limiting portion 34 provided in the manufacturing apparatus 2 in the positive X-axis direction (the other side of the third direction) of the shim 300, and restricting the movement of the shim 300 in the positive X-axis direction (the other side of the third direction) relative to the manufacturing apparatus 2.

[0084] Furthermore, the manufacturing method of the energy storage device 1 includes holding the shim 300 by a holding section 20 that holds the energy storage unit 10. Specifically, the manufacturing method of the energy storage device 1 includes holding an end of the shim 300 in the negative Z-axis direction (one side in the second direction) by the magnetic force of a magnet 40 provided in the holding section 20. The manufacturing method of the energy storage device 1 includes holding the shim 300 at multiple positions provided in the holding section 20 that are aligned in the X-axis direction (third direction). The manufacturing method of the energy storage device 1 includes holding the shim 300 in a state in which the holding section 20 and the shim 300 are not in contact with each other.

[0085] Next, the manufacturing apparatus 2 inserts the energy storage unit 10 and the shim 300 into the case body 410 while compressing the energy storage unit 10 in the Y-axis direction. As a result, as shown in FIG. 12 , the energy storage unit 10 and the shim 300 are placed inside the case body 410 with the shim 300 spaced apart from the side portion 412 of the case body 410.

[0086] Next, the manufacturing apparatus 2 releases the compression of the energy storage unit 10. As a result, as shown in FIG. 13 , the bulging portions of the compressed energy storage elements 100 and the elastically deformable portions of the spacers 200 return to their original positions, the energy storage unit 10 expands in the Y-axis direction, and the shim 300 comes into contact with the side portion 412 of the case main body 410. The shim 300 is positioned by the limiting portion 30 provided in the manufacturing apparatus 2 (holding portion 20) and held by the magnet 40, so that the shim end portion 330 is positioned away from the case end portion 411c. Thereafter, the manufacturing apparatus 2 is removed, resulting in the state shown in FIG. 6A .

[0087] Before or after the energy storage unit 10 is inserted into the case body 410, bus bars, bus bar frames, and the like are arranged for the plurality of energy storage elements 100. Then, the case body 410 and the lid 420 are joined together to house the energy storage unit 10 in the case 400, and the energy storage device 1 is manufactured.

[0088] [3 Explanation of effects] As described above, according to the manufacturing apparatus 2 for the energy storage device 1 according to the present embodiment, the holding section 20 that holds the energy storage unit 10 holds the shim 300. In this way, when the holding section 20 holds the energy storage unit 10, the holding section 20 also holds the shim 300, so that the shim 300 can be positioned relative to the energy storage unit 10. This makes it possible to suppress misalignment of the shim 300 when the energy storage device 1 is manufactured.

[0089] If misalignment of the shim 300 can be prevented by holding the shim 300, even if a rounded portion (corner radius) is formed on the bottom 411 of the case 400, the shim 300 can be prevented from coming into contact with the rounded portion. This prevents the shim 300 from being placed in an inclined state, thereby preventing problems such as scraping of the case 400 by the shim 300 or deterioration of vibration resistance. The holding portion 20 that holds the energy storage unit 10 also holds the shim 300, allowing the shim 300 to be inserted into the case 400 together with the energy storage unit 10. If the shim 300 is inserted into the case 400 without being positioned relative to the energy storage unit 10, the shim 300 may move (fall) in the negative Z-axis direction relative to the energy storage unit 10, and the shim 300 may come into contact with the rounded portion of the bottom 411 of the case 400. By inserting the shim 300 into the case 400 while positioning it relative to the electricity storage unit 10, it is possible to prevent the shim 300 from moving (falling) in the negative Z-axis direction relative to the electricity storage unit 10 and coming into contact with the rounded portion.

[0090] By providing the configuration for holding the shim 300 in the manufacturing device 2 rather than in the shim 300 or the electricity storage unit 10, the shim 300 can be held while minimizing the impact on the function of the shim 300.

[0091] In the manufacturing apparatus 2 for the electricity storage device 1, the holding unit 20 holds the shim 300 by magnetic force, so that the shim 300 can be easily held using the magnet 40 or the like.

[0092] By having the holder 20 hold the shim 300 without contacting the shim 300, it is possible to prevent the holder 20 from coming into contact with the shim 300 and affecting the positioning of the shim 300.

[0093] The case 400 has a bottom 411 in the negative Z-axis direction (one side in the second direction), and the holder 20 holds the end of the shim 300 in the negative Z-axis direction (one side in the second direction). In this way, the holder 20 holds the end of the shim 300 in the negative Z-axis direction (one side in the second direction, the bottom 411 side of the case 400), thereby enabling the shim 300 to be stably held. The holder 20 holds the end of the shim 300 on the side of the bottom 411 of the case 400, thereby improving the positioning accuracy of the end of the shim 300 on the side of the bottom 411 of the case 400, and thus preventing the shim 300 from contacting the rounded portion of the bottom 411 of the case 400.

[0094] The holding portion 20 holds the shim 300 at a plurality of locations aligned in the X-axis direction (third direction), thereby making it possible to hold the shim 300 stably.

[0095] The holder 20 includes a limiting portion 30 that limits movement of the shim 300 relative to the holder 20 in a direction intersecting the Y-axis direction (first direction). That is, the holder 20 limits movement of the shim 300 in that direction using the limiting portion 30, and also holds the shim 300. This allows the holder 20 to hold the shim 300 while positioning it, thereby improving the positioning accuracy of the shim 300.

[0096] According to the manufacturing method of the energy storage device 1 according to this embodiment, the shim 300 is held by the holding section 20 that holds the energy storage unit 10. In this way, when the holding section 20 holds the energy storage unit 10, the holding section 20 also holds the shim 300, so that the shim 300 can be positioned relative to the energy storage unit 10. This makes it possible to prevent the shim 300 from shifting in position when the energy storage device 1 is manufactured.

[0097] The manufacturing apparatus 2 for the energy storage device 1 according to this embodiment is provided with first limiting units 31 and 32 that are arranged in the positive direction of the Z axis (the other side in the second direction) of the shim 300 and limit movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction) relative to the manufacturing apparatus 2. In this way, in the manufacturing apparatus 2 for the energy storage device 1, the first limiting units 31 and 32 limit movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction), thereby enabling the shim 300 to be positioned. This makes it possible to prevent the shim 300 from shifting in position when the energy storage device 1 is manufactured.

[0098] If displacement of the shim 300 can be suppressed by limiting the movement of the shim 300, it is possible to prevent the shim 300 from coming into contact with a rounded portion (corner radius) even if the bottom 411 of the case 400 has such a rounded portion. This prevents the shim 300 from being disposed in an inclined state, thereby preventing problems such as scraping of the case 400 by the shim 300 or deterioration of vibration resistance. If the first limiting portions 31 and 32 were disposed in the negative direction of the Z axis of the shim 300, it would be difficult to move the first limiting portions 31 and 32 in the positive direction of the Z axis when removing the manufacturing apparatus 2. However, because the first limiting portions 31 and 32 are disposed in the positive direction of the Z axis of the shim 300, the first limiting portions 31 and 32 can be easily moved in the positive direction of the Z axis.

[0099] By providing the configuration for restricting the movement of the shim 300 not in the shim 300 or the electricity storage unit 10 but in the manufacturing device 2, the shim 300 can be positioned while suppressing any influence on the function of the shim 300.

[0100] The holder 20 that holds the energy storage unit 10 includes first limiting portions 31 and 32. As a result, when the holder 20 holds the energy storage unit 10, the shim 300 is positioned by the first limiting portions 31 and 32 of the holder 20, making it possible to easily position the shim 300 relative to the energy storage unit 10. As the holder 20 that holds the energy storage unit 10 includes the first limiting portions 31 and 32, the shim 300 can be inserted into the case 400 together with the energy storage unit 10 while being positioned by the first limiting portions 31 and 32. If the shim 300 is inserted into the case 400 without being positioned relative to the energy storage unit 10, the shim 300 may move (fall) in the negative Z-axis direction relative to the energy storage unit 10, and may come into contact with a rounded portion of the bottom 411 of the case 400. By inserting the shim 300 into the case 400 while positioning it relative to the electricity storage unit 10, it is possible to prevent the shim 300 from moving (falling) in the negative Z-axis direction relative to the electricity storage unit 10 and coming into contact with the rounded portion.

[0101] The manufacturing apparatus 2 of the energy storage device 1 is further provided with a second limiting section 33 that limits movement of the shim 300 in the negative X-axis direction (one side of the third direction) relative to the manufacturing apparatus 2, thereby enabling the shim 300 to be positioned also in the negative X-axis direction (one side of the third direction).

[0102] The manufacturing apparatus 2 of the energy storage device 1 further includes a third limiting unit 34 that limits movement of the shim 300 in the positive direction of the X axis (the other side of the third direction) relative to the manufacturing apparatus 2, thereby enabling the shim 300 to be positioned also in the positive direction of the X axis (the other side of the third direction). This allows the shim 300 to be positioned on both sides in the X axis direction (the third direction).

[0103] The manufacturing apparatus 2 of the energy storage device 1 holds the end of the shim 300 in the negative Z-axis direction (one side in the second direction). That is, the manufacturing apparatus 2 limits movement of the shim 300 in the positive Z-axis direction (the other side in the second direction) using the first limiting units 31 and 32 arranged in the positive Z-axis direction (the other side in the second direction) of the shim 300, and holds the end of the shim 300 in the negative Z-axis direction (one side in the second direction). This allows the manufacturing apparatus 2 to stably hold the shim 300 while positioning it.

[0104] The first limiting portions 31 and 32 are disposed in the positive direction of the Z axis (the other side in the second direction) of the shim protrusion 320 of the shim 300. In other words, by disposing the first limiting portions 31 and 32 in the positive direction of the Z axis (the other side in the second direction) of the shim protrusion 320 that is used when transporting the shim 300, movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction) can be restricted. In this way, the shim 300 can be easily positioned by utilizing the shim protrusion 320 that is used when transporting the shim 300.

[0105] In the manufacturing method for the energy storage device 1 according to the present embodiment, the first limiting units 31 and 32 provided in the manufacturing apparatus 2 are arranged in the positive direction of the Z axis (the other side in the second direction) of the shim 300, and limit movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction) relative to the manufacturing apparatus 2. In this way, in the manufacturing method for the energy storage device 1, the shim 300 can be positioned by limiting movement of the shim 300 in the positive direction of the Z axis (the other side in the second direction) with the first limiting units 31 and 32. This makes it possible to suppress misalignment of the shim 300 when manufacturing the energy storage device 1.

[0106] [4 Explanation of Variations] The above describes the energy storage device 1, the manufacturing apparatus 2 for the energy storage device 1, and the manufacturing method for the energy storage device 1 according to the embodiment of the present invention, but the present invention is not limited to the above embodiment. The embodiment disclosed herein is illustrative in all respects, and the scope of the present invention includes all modifications within the meaning and scope of the claims.

[0107] In the above embodiment, the holding unit 20 included in the manufacturing apparatus 2 for the energy storage device 1 includes the first limiting units 31 and 32, the second limiting unit 33, and the third limiting unit 34, but is not limited to this. The holding unit 20 does not necessarily have to include at least one of the first limiting units 31 and 32, the second limiting unit 33, and the third limiting unit 34.

[0108] In the above embodiment, the second limiting portion 33 and the third limiting portion 34 are arranged between (inside) the two shim protruding portions 320 to limit movement of the shim 300 in both directions in the X-axis direction relative to the holder 20, but this is not limited to this. The second limiting portion 33 and the third limiting portion 34 may be arranged outside the two shim protruding portions 320 (the two shim protruding portions 320 are arranged between the second limiting portion 33 and the third limiting portion 34) to limit movement of the shim 300 in both directions in the X-axis direction relative to the holder 20.

[0109] In the above embodiment, the holding portion 20 (holding portion protrusion 22) holds the end of the shim 300 in the negative Z-axis direction by the magnetic force of the magnet 40, but this is not limited to this. The holding portion 20 may hold the center of the shim 300 in the Z-axis direction or the end of the shim 300 in the positive Z-axis direction, etc. The holding portion 20 may hold the shim 300 by means other than magnetic force, such as adhesive, double-sided tape, or a spring.

[0110] In the above embodiment, the holding portion 20 holds the shim 300 in a state where the holding portion 20 and the shim 300 are not in contact with each other, but the holding portion 20 and the shim 300 may also hold the shim 300 in a state where the holding portion 20 and the shim 300 are in contact with each other.

[0111] In the above embodiment, all of the holding portion protrusions 22 provided on the holding portion 20 have the above configuration, but it is not necessary for any of the holding portion protrusions 22 to have the above configuration.

[0112] In the above embodiment, the holding portion 20 is provided with four holding portion protrusions 22 (and magnets 40), but the number of holding portion protrusions 22 (and magnets 40) is not particularly limited, and only one holding portion protrusion 22 (and magnet 40) may be arranged.

[0113] In the above embodiment, the holding unit 20 holds the power storage unit 10 and the shim 300. However, it is not necessary for the holding unit 20 to hold at least one of the power storage unit 10 and the shim 300. In this case, at least one of the power storage unit 10 and the shim 300 is held by a member other than the holding unit 20.

[0114] In the above embodiment, the limiting portion 30 is disposed adjacent to the shim protrusion 320 to limit the movement of the shim 300, but the limiting portion 30 may be disposed adjacent to a portion other than the shim protrusion 320, such as the shim main body 310, to limit the movement of the shim 300. In this case, the shim 300 does not need to include the shim protrusion 320.

[0115] In the above embodiment, the shim 300 is described as having two shim protrusions 320, but there is no particular limitation on the number of shim protrusions 320. The shim 300 may have three or more shim protrusions 320. In this case, the configuration around the shim protrusions 320 added to the above configuration may have the same configuration as the above, or may have a different configuration.

[0116] In the above embodiment, the spacer wall 220 of the spacer 200b has a plurality of walls, but this is not limiting. The spacer 200b may be a holder that holds the energy storage elements 100 by including at least one of the walls included in the spacer wall 220, or may be a spacer that does not hold the energy storage elements 100 by not including all of the walls.

[0117] In the above embodiment, bottom 411 of case 400 has step 411b, but it does not have to have step 411b. In this case, case end 411c may be the connection portion between bottom wall 411a and side portion 412.

[0118] In the above embodiment, the height of the case body 410 in the Z-axis direction is not particularly limited. That is, the case body 410 may be configured to have a sufficient height in the Z-axis direction to accommodate the power storage unit 10, and the power storage unit 10 may not protrude from the case body 410 in the positive direction of the Z-axis. The case body 410 may have a height of about two-thirds or half of the power storage unit 10 in the Z-axis direction, to accommodate a portion of the power storage unit 10 in the negative direction of the Z-axis, and to expose a portion of the power storage unit 10 in the positive direction of the Z-axis. In this case, the lid 420 may have a height of about one-third or half of the power storage unit 10 in the Z-axis direction, and to accommodate a portion of the power storage unit 10 in the positive direction of the Z-axis.

[0119] In the above embodiment, a plurality of power storage units 10 arranged in the X-axis direction may be housed inside the case 400. A plurality of power storage units 10 arranged in the Y-axis direction may be housed inside the case 400. When a plurality of power storage units 10 are housed in the case 400, the above-described configuration may be provided for each of the plurality of power storage units 10, or the above-described configuration may not be provided for any of the power storage units 10.

[0120] In the above embodiment, the case 400 is provided with the case body 410 and the lid 420, but the lid 420 may not be provided.

[0121] In the above embodiment, the energy storage unit 10 may not include the spacer 200a or may not include the spacer 200b. When the energy storage unit 10 does not include the spacer 200b, the holding unit 20 included in the manufacturing apparatus 2 for the energy storage device 1 holds the energy storage elements 100 by holding a member other than the spacer 200b, such as the energy storage elements 100.

[0122] Any combination of the components of the above-described embodiment and its modifications is also included within the scope of the present invention. [Industrial Applicability]

[0123] The present invention can be applied to a manufacturing apparatus for an electricity storage device including an electricity storage element such as a lithium ion secondary battery. [Explanation of symbols]

[0124] 1. Energy storage device 2 Manufacturing equipment 10 Energy storage unit 20 Holding part 21 Holding part main body part 22, 22a, 22b, 22c, 22d Holding part protrusion 23 Opposite holding part 23a Support part 30 Restricted Section 31, 32 First Restriction Section 33 Second Restricted Section 34 Third Restricted Section 40 Magnet 100 Energy storage element 110 Container 140 terminals 200, 200a, 200b spacers 210 Spacer body 220, 221, 222 Spacer wall 230, 231, 232, 233, 234, 235 Spacer protrusions 300 sim 310 Shim body 320 Shim protrusion 330 Shim end 400 cases 410 Case body 411 Bottom 411a Bottom wall 411b Step 411c Case end 412 Side 420 Lid

Claims

1. An apparatus for manufacturing an electricity storage device, The power storage device is a power storage unit including a power storage element; a shim disposed adjacent to the power storage unit; a case that houses the power storage unit and the shim, the manufacturing apparatus includes a holding unit that holds the electricity storage unit, The holding portion holds the shim. Manufacturing equipment for energy storage devices.

2. The holding portion holds the shim by magnetic force. The manufacturing apparatus for the electricity storage device according to claim 1 .

3. The holding portion holds the shim in a non-contact state between the holding portion and the shim. The manufacturing apparatus for the electricity storage device according to claim 2 .

4. the case includes a bottom portion on one side in a second direction that intersects with a first direction that is an arrangement direction of the power storage unit and the shim, The holding portion holds the end portion of the shim on the one side in the second direction. The manufacturing apparatus for the electricity storage device according to any one of claims 1 to 3.

5. The holding portion holds the shim at a plurality of portions aligned in a third direction that intersects with a first direction that is an alignment direction of the power storage unit and the shim. The manufacturing apparatus for the electricity storage device according to any one of claims 1 to 3.

6. The holding portion is disposed adjacent to the shim in a direction intersecting a first direction in which the power storage unit and the shim are arranged, and includes a limiting portion that limits movement of the shim relative to the holding portion in the direction intersecting the first direction. The manufacturing apparatus for the electricity storage device according to any one of claims 1 to 3.

7. A method for manufacturing an electricity storage device, comprising: The power storage device is a power storage unit including a power storage element; a shim disposed adjacent to the power storage unit; a case that houses the power storage unit and the shim, The manufacturing method includes holding the shim with a holder that holds the power storage unit. A method for manufacturing an electricity storage device.

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