JP6281204B2 - Electricity storage element - Google Patents

Description

  The present invention relates to a power storage element having an electrode body housed in a container.

  As an approach to global environmental problems, vehicles equipped with a motor as a power source, such as hybrid vehicles and electric vehicles, instead of conventional gasoline vehicles are beginning to spread.

  In addition, power storage elements such as lithium ion secondary batteries are widely used as a power source for supplying electric power to motors provided in these hybrid vehicles.

  Such a power storage element includes, for example, an electrode terminal provided so as to protrude from the container, and a metal connection plate connected to the electrode terminal. Further, the connection plate and a conductive member for electrical connection with an external device are fastened by bolts, nuts, and the like.

  Patent Documents 1 and 2 disclose structures for preventing movement of electrode terminals and the like when fastening a connection plate and an external connection terminal in a battery having such a configuration.

Japanese Patent No. 5146110

  Here, in a power storage element such as a battery, when an external conductive member is attached with a bolt and a nut or the like, in order not to move a member such as an electrode terminal, conventionally, as disclosed in Patent Document 1 above, An insulating member (fixing member) for fixing these members is incorporated in the electric storage element.

  Specifically, this fixing member is disposed on the lid plate together with other members such as electrode terminals, and the lid plate and the container body are joined so that the opening of the container body is closed by the lid plate.

  As a method for joining the lid plate and the container body, for example, welding is used. Conventionally, the presence of the fixing member can be a limitation on the position and range of welding.

  In addition, since it is necessary to complete the attachment of the fixing member to the lid plate before welding the lid plate and the container body, the presence of the fixing member can be a limitation on the manufacturing process of the storage element. .

  In view of the above-described conventional problems, an object of the present invention is to provide a power storage element that can suppress the occurrence of unnecessary displacement of members such as electrode terminals and can be efficiently manufactured.

  In order to achieve the above object, a power storage element according to one embodiment of the present invention includes a container that houses an electrode body, and a positive electrode terminal and a negative electrode terminal that are electrically connected to the electrode body and project from the container A first terminal that is one of the first terminal, a first connection plate connected to the first terminal, a first fastening member that fastens the first connection plate and a conductive member outside the power storage element, and at least a part thereof Is disposed between the container and the first connection plate, and holds a part of the first fastening member, so that the first fastening member extends in a direction intersecting the protruding direction of the first terminal. A first insulating member that regulates movement, wherein the first insulating member is an engaging portion including a portion provided in a cutout shape from an edge of the first insulating member, It has an engaging part engaged with parts other than the wall surface of the said container.

  According to this configuration, a part of the first fastening member that fastens the first connecting plate and the external conductive member is restricted by the first insulating member from moving in the direction intersecting the protruding direction of the first terminal. .

  Accordingly, when the first connection plate and the conductive member are fastened, for example, the first connection plate is prevented from rotating around the first terminal. As a result, it is possible to suppress a decrease in the reliability of connection between the first connection plate and the first terminal, or a decrease in airtightness between the first terminal and the container.

  Moreover, the 1st insulating member has an engaging part containing the part provided in the notch shape from the edge. That is, the first insulating member can be attached to a predetermined portion of the power storage element so as to slide from a direction intersecting the protruding direction of the first terminal.

  Thereby, a 1st insulating member can be arrange | positioned, for example in the container of the state with which the cover plate and the container main body were joined by welding etc. That is, simply speaking, the first insulating member can be retrofitted to the container of the electricity storage element.

  Therefore, for example, the welded portion between the container body and the cover plate can be covered with the first insulating member. As a result, the effect of electrical insulation by the first insulating member can be obtained in a wider range.

  As described above, the electricity storage device according to this aspect is an electricity storage device in which occurrence of unnecessary displacement (movement or rotation of the member from its normal position) of members such as electrode terminals is suppressed and can be efficiently manufactured. It is.

  In the electricity storage device according to one embodiment of the present invention, the first insulating member is further in contact with the wall surface of the container, so that the first insulating member is in a plane intersecting the protruding direction of the first terminal. It is good also as having a contact part which controls rotation in.

  According to this configuration, the movement or rotation of the first insulating member relative to the container is more reliably suppressed, and as a result, the anti-rotation effect for the first connection plate and the first terminal is also improved.

  Further, in the energy storage device according to one aspect of the present invention, the contact portion is on an outer side of a side wall surface that is a wall surface parallel to a direction intersecting with a main surface of the container on which the first terminal is disposed. It is also possible to regulate the rotation of the first insulating member in the plane by abutting from the side.

  Further, in the energy storage device according to one aspect of the present invention, the contact portion is formed on an inner wall surface that is a wall surface provided upright from an edge of a main surface that is a surface on which the first terminal is disposed. By abutting from the inside, the rotation of the first insulating member in the plane may be restricted.

  Thus, the contact portion can be provided on the first insulating member in a manner corresponding to the shape of the container, for example. That is, it is possible to arrange the first insulating member in a container having various shapes by retrofitting.

  Moreover, the electrical storage element which concerns on 1 aspect of this invention WHEREIN: The said engaging part may engage with said 1st terminal which is parts other than the wall surface of the said electrical storage element.

  According to this configuration, the first insulating member can be retrofitted and fixed to the container using the first terminal which is an electrode terminal.

  The power storage device according to one embodiment of the present invention further includes a second terminal that is the other of the positive terminal and the negative terminal, a second connection plate connected to the second terminal, and the second connection plate. A second fastening member that fastens the conductive member outside the power storage element, and at least a part of the second fastening member is disposed between the container and the second connection plate, and holds a part of the second fastening member. A second insulating member that restricts movement of the second fastening member in a direction intersecting with the protruding direction of the second terminal, and the engaging portion of the first insulating member includes the power storage element, You may engage with said 2nd insulating member which is parts other than the wall surface of the said container.

  According to this configuration, it is possible to retrofit and fix the first insulating member to the container using the second insulating member functioning as a rotation preventing member on the second terminal side. That is, one of the first insulating member and the second insulating member is locked to the other. Therefore, the occurrence of displacement of the first insulating member and the second insulating member is suppressed by the shapes of the first insulating member and the second insulating member themselves without depending on other members.

  The power storage device according to one embodiment of the present invention further includes a second terminal that is the other of the positive terminal and the negative terminal, a second connection plate connected to the second terminal, and the second connection plate. A second fastening member that fastens a conductive member outside the power storage element, wherein the first insulating member is partially disposed between the container and the second connection plate, and the second fastening member By holding a part of the second fastening member, the movement of the second fastening member in the direction intersecting the protruding direction of the second terminal may be restricted.

  According to this configuration, for example, the first terminal side rotation stop and the second terminal side rotation stop can be carried by one member (first insulating member). Therefore, it is possible to reduce the number of parts constituting the power storage element, simplify the manufacturing process of the power storage element, and the like.

  In the energy storage device according to one embodiment of the present invention, the first insulating member has a thin portion that facilitates bending of the insulating member at a position between the first terminal and the second terminal. Also good.

  According to this configuration, since the work of arranging the first insulating member in the container is facilitated, the production of the power storage element is further improved.

  In the energy storage device according to one embodiment of the present invention, the first insulating member may be composed of a composite material of a resin and an inorganic material.

  According to this configuration, for example, it is possible to improve the strength as a detent of a member such as the first terminal and to improve the reliability of electrical insulation between the container and the other member.

  In the energy storage device according to one aspect of the present invention, the first fastening member includes a bolt and a nut, and the first insulating member holds the nut that is a part of the first fastening member. Also good.

  According to this configuration, the first insulating member holding the nut is disposed so as to be inserted between the first connection plate and the container, whereby the first insulating member can be retrofitted to the container.

  Further, in the energy storage device according to one aspect of the present invention, the first fastening member includes a bolt and a nut, and the first insulating member stands up with the bolt that is a part of the first fastening member. The first connection plate may be formed with a groove extending from the edge of the first connection plate to a position through which the bolt passes.

  According to this configuration, the first insulating member that holds the bolt in an upright state is disposed so that the bolt is inserted into the groove provided in the first connection plate, whereby the container of the first insulating member Can be retrofitted to.

  In the electric storage element according to one embodiment of the present invention, the conductive member connected to the first connection plate is a metal plate, and the first insulating member is the electric storage device from the side where the metal plate is disposed. When the element is viewed, it may be arranged so as to cover at least a region where the metal plate overlaps with a main surface on which the first terminal of the container is projected.

  According to this configuration, the first insulating member is disposed between the container and the metal plate (for example, bus bar) to be insulated from the container. Therefore, even if the power storage element to which the metal plate is connected is placed in an abnormal state where the metal plate or the power storage element is deformed by a strong impact, the container and the metal plate are not connected. Occurrence of a short circuit is suppressed.

  In addition, a power storage element according to one embodiment of the present invention includes a container that accommodates an electrode body, and a positive electrode terminal and a negative electrode terminal that are electrically connected to the electrode body and project from the container. A terminal, a first connection plate connected to the first terminal, a first fastening member that fastens the first connection plate and a conductive member outside the power storage element, and at least a part of the container and the first A restricting member that is disposed between the first connecting member and restricts the movement of the first fastening member in a direction intersecting the protruding direction of the first terminal by holding a part of the first fastening member. The restricting member is an engaging portion including a portion provided in a cutout shape from an end edge of the restricting member, the engaging member engaging with a portion other than the wall surface of the container of the power storage element. It may have a joint.

  According to this structure, the same effect as said 1st insulation member, such as suppression of rotation of a 1st connection board, can be acquired with a control member.

  Further, the regulating member according to one aspect of the present invention is a regulating member disposed in the power storage element, and the power storage element includes a container that houses the electrode body, and an electrode terminal that is electrically connected to the electrode body. And a connecting plate connected to the electrode terminal, and a fastening member that fastens the connecting plate and a conductive member outside the power storage element, and at least a part of the regulating member is the container and the It is arrange | positioned between connection plates, By hold | maintaining a part of said fastening member, the movement to the direction which cross | intersects the protrusion direction of the said electrode terminal of the said fastening member is controlled, From the edge of the said regulating member It is an engaging part including the part provided in the notch shape, Comprising: It has an engaging part engaged with parts other than the wall surface of the said container of the said electrical storage element.

  According to the restriction member of this aspect, the same effects as the first insulating member, such as suppression of the rotation of the connection plate, can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical storage element which can suppress the unnecessary shift | offset | difference of members, such as an electrode terminal, and can be manufactured efficiently can be provided.

It is a perspective view which shows the outline | summary of the internal structure of the battery in embodiment. It is a perspective view which shows an example of the shape of the insulating member in embodiment, and the attachment method. It is sectional drawing which shows the AA cross section in the insulating member of FIG. It is a figure which shows the insulation member and its periphery of the battery in embodiment. It is a figure for demonstrating the anti-rotation effect about the connection board and positive electrode terminal by an insulating member. It is a figure which shows the insulating member in the modification 1 of embodiment. It is a figure which shows an external appearance when the insulating member shown in FIG. 6 has a thin part. It is a top view which shows the shape of the various insulating members in the modification 2 of embodiment. It is sectional drawing of the insulating member in the modification 3 of embodiment. It is a side view which shows the insulating member of the battery in the modification 4 of embodiment, and the side surface of the periphery. It is a figure which shows the structure outline | summary of the battery in the modification 5 of embodiment. It is sectional drawing which shows the structural example of the insulating member in embodiment.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  In addition, the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, constituent elements, arrangement positions and connecting forms of the constituent elements shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  In the following embodiment, a battery is taken as an example of a power storage element, and the battery 10 in the embodiment will be described with reference to FIGS.

(Outline of configuration of power storage element)
FIG. 1 is a perspective view showing an outline of the internal structure of battery 10 in the embodiment. In FIG. 1, the inside of the container 100 is seen through.

  The battery 10 is a secondary battery that can charge and discharge electricity, for example, a non-aqueous electrolyte secondary battery.

  Examples of the non-aqueous electrolyte secondary battery include a lithium ion secondary battery in which the positive electrode active material is a lithium transition metal oxide such as lithium cobaltate and the negative electrode active material is a carbon material.

  The type of the battery 10 is not limited to the nonaqueous electrolyte secondary battery, and may be a secondary battery other than the nonaqueous electrolyte secondary battery, or may be a primary battery. Moreover, the battery 10 may be a capacitor such as a lithium ion capacitor, which is a power storage element.

  As shown in FIG. 1, the battery 10 includes a container 100 that houses the electrode body 400, and a positive electrode terminal 200 and a negative electrode terminal 300 that are electrically connected to the electrode body 400 and project from the container 100.

  One of the positive terminal 200 and the negative terminal 300 is an example of a first terminal, and the other is an example of a second terminal.

  The battery 10 further includes a connection plate 210 connected to the positive electrode terminal 200, a connection plate 310 connected to the negative electrode terminal 300, a fastening member 280 that fastens the connection plate 210 and an external conductive member, and a connection plate 310. And a fastening member 380 for fastening the external conductive member.

  Specifically, each of the connection plates 210 and 310 includes, for example, a conductive member such as a metal plate or a lead wire for electrical connection with another device (another power storage element or a load such as a motor). Can be fastened by fastening members 280 and 380.

  Note that each of the fastening members 280 and 380 is realized by a combination of a bolt and a nut in the present embodiment.

  The positive electrode terminal 200 and the connection plate 210 are connected by caulking or welding, for example. Similarly, the negative electrode terminal 300 and the connection plate 310 are connected by caulking or welding, for example.

  In the battery 10 having such a configuration, an insulating member 220 that functions as a detent for the positive electrode terminal 200 and the connection plate 210 and an insulating member 320 that functions as a detent for the negative electrode terminal 300 and the connection plate 310 are disposed. .

  At least a part of the insulating member 220 is disposed between the container 100 and the connection plate 210 and holds a part of the fastening member 280 so that the fastening member 280 intersects the protruding direction of the positive electrode terminal 200. Regulate the movement of

  Further, at least a part of the insulating member 320 is disposed between the container 100 and the connection plate 310, and by holding a part of the fastening member 380, the insulating member 320 intersects the protruding direction of the negative electrode terminal 300 of the fastening member 380. Restrict movement in the direction.

  In the present embodiment, when the protruding direction of the positive electrode terminal 200 and the negative electrode terminal 300 is parallel to the Z axis, the fastening members 280 in the XY plane, which is a plane intersecting the protruding direction, are insulated by the insulating members 220 and 320. The movement of 380 is restricted.

  The insulating member 220 is an engaging portion 221 including a portion provided in a cutout shape from the edge of the insulating member 220, and is an engaging portion that engages with a portion of the battery 10 other than the wall surface of the container 100. 221.

  Similarly, the insulating member 320 is an engaging portion 321 including a portion provided in a cutout shape from the edge of the insulating member 320, and is an engaging portion that engages with a portion of the battery 10 other than the wall surface of the container 100. 321.

  Details of the insulating members 220 and 320 will be described later with reference to FIG.

  The container 100 includes a container main body 101 having a rectangular cylindrical shape made of metal and having a bottom, and a metal lid plate 110 that closes an opening of the container main body 101.

  In addition, an electrode body 400, a positive electrode current collector 120, and a negative electrode current collector 130 are disposed inside the container 100.

  In addition, although liquid, such as electrolyte solution, is enclosed inside the container 100 of the battery 10, illustration of the liquid is omitted.

  The container 100 has a structure in which after the electrode body 400 and the like are accommodated therein, the lid plate 110 and the container body 101 are welded to seal the inside. As a technique for welding the lid plate 110 and the container body 101, for example, laser welding using a laser beam is employed.

  The electrode body 400 includes a positive electrode, a negative electrode, and a separator, and is a member that can store electricity. Specifically, the electrode body 400 is formed by winding a layered structure so that a separator is sandwiched between a negative electrode and a positive electrode so that the whole becomes an oval shape. Further, the positive foil is made of, for example, aluminum, and the negative foil is made of, for example, copper.

  The shape of the electrode body 400 is not limited to an oval shape, and may be a circular shape or an elliptical shape. The structure of the electrode body 400 is not limited to a wound type, and may be a structure in which flat plate plates are stacked.

  The positive electrode terminal 200 is an electrode terminal electrically connected to the positive electrode of the electrode body 400, and the negative electrode terminal 300 is an electrode terminal electrically connected to the negative electrode of the electrode body 400.

  The positive electrode terminal 200 and the negative electrode terminal 300 are attached to the cover plate 110 disposed above the electrode body 400 in a state insulated from the cover plate 110.

  Specifically, each of the positive electrode terminal 200 and the negative electrode terminal 300 is attached to the lid plate 110 via an insulating packing (not shown).

  The positive electrode current collector 120 is disposed between the positive electrode of the electrode body 400 and the side wall of the container 100, and is a member having conductivity and rigidity that is electrically connected to the positive electrode terminal 200 and the positive electrode of the electrode body 400. It is. The positive electrode current collector 120 is made of aluminum, like the positive electrode foil of the electrode body 400.

  The negative electrode current collector 130 is disposed between the negative electrode of the electrode body 400 and the side wall of the container 100, and is a member having conductivity and rigidity that is electrically connected to the negative electrode terminal 300 and the negative electrode of the electrode body 400. It is. The negative electrode current collector 130 is made of copper, like the negative electrode foil of the electrode body 400.

  Various non-aqueous electrolytes (electrolytic solutions) sealed in the container 100 can be selected.

  For example, as an organic solvent for non-aqueous electrolyte, ethylene carbonate, propylene carbonate, butylene carbonate, trifluoropropylene carbonate, γ-butyrolactone, γ-valerolactone, sulfolane, 1,2-dimethoxyethane, 1,2-diethoxyethane, Tetrahydrofuran, 2-methyltetrahydrofuran, 2-methyl-1,3-dioxolane, dioxolane, fluoroethyl methyl ether, ethylene glycol diacetate, propylene glycol diacetate, ethylene glycol dipropionate, propylene glycol dipropionate, methyl acetate, acetic acid Ethyl, propyl acetate, butyl acetate, methyl propionate, ethyl propionate, propyl propionate, dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, dipropyl carbonate, methyl isopropyl carbonate, ethyl isopropyl carbonate, diisopropyl carbonate, dibutyl carbonate, acetonitrile, fluoroacetonitrile, ethoxypentafluorocyclotriphosphazene, diethoxytetrafluorocyclotriphosphazene, Alkoxy and halogen-substituted cyclic phosphazenes such as phenoxypentafluorocyclotriphosphazene or chain phosphazenes, phosphate esters such as triethyl phosphate, trimethyl phosphate and trioctyl phosphate, boric acids such as triethyl borate and tributyl borate Esters, N-methyloxazolidinone, N-ethyloxazolidinone It includes non-aqueous solvents are. Moreover, a well-known additive can also be added to this.

  When a solid electrolyte is used, a porous polymer solid electrolyte membrane may be used as the polymer solid electrolyte, and an electrolyte solution may be further contained in the polymer solid electrolyte. Moreover, when using a gel-like polymer solid electrolyte, the electrolyte solution which comprises gel and the electrolyte solution contained in the pore etc. may differ. However, in the case of a medium-sized or large-sized battery that requires high output and high capacity, it is more preferable to use a nonaqueous electrolyte alone than to use a solid electrolyte or a polymer solid electrolyte.

(Details of insulation members)
The shape and the like of the insulating members 220 and 320 in the battery 10 according to the embodiment having the basic configuration as described above will be described with reference to FIGS.

  Here, in the present embodiment, the shape and mounting structure of the positive-side member (positive electrode terminal 200 and insulating member 220 and the like) and the negative-electrode side member (negative electrode terminal 300 and insulating member 320 and the like) are substantially the same. Are the same. Therefore, below, the matter regarding the member on the positive electrode side will be mainly described, and the description of the matter regarding the member on the negative electrode side will be omitted as appropriate.

  FIG. 2 is a perspective view showing an example of the shape and attachment method of the insulating member 220 in the embodiment. In FIG. 2, the container 100 is indicated by a dotted line, and the inside of the container 100 is seen through.

  3 is a cross-sectional view showing an AA cross section of the insulating member 220 of FIG.

  FIG. 4 is a diagram showing the insulating member 220 of the battery 10 and the periphery thereof in the embodiment.

  4A is a top view showing the structure around the insulating member 220 of the battery 10, and FIG. 4B is a front view corresponding to FIG. 4A. FIG. 4C is a side view corresponding to FIG.

  In this embodiment, for convenience of explanation, the protruding direction (Z-axis positive direction) of the electrode terminal (at least one of the positive electrode terminal 200 and the negative electrode terminal 300; the same shall apply hereinafter) in the battery 10 is treated as the top. There is no particular limitation on the orientation of the battery 10 when the battery 10 is disposed in an automobile or the like.

  The insulating member 220 provided in the battery 10 has a holding part 222. For example, as shown in FIG. 2, the holding unit 222 holds a nut 282 that is a part of a fastening member 280 including a bolt 281 and a nut 282.

  The holding part 222 of the present embodiment is realized by a hexagonal hole matched with a nut 282 whose outer shape is a hexagon. More specifically, the hole that is the holding portion 222 is a bottomed hole as shown in FIG. Therefore, even if there is no other insulating member between the insulating member 220 and the cover plate 110 immediately below the nut 282, the nut 282 and the cover plate 110 are electrically insulated.

  In FIG. 3, the depth of the holding portion 222 is shallower than the height of the nut 282 in the axial direction, so that a part of the nut 282 protrudes upward from the hole. However, the entire nut 282 may be inserted into the holding portion 222.

  In order to prevent the nut 282 inserted into the holding part 222 from falling off, the nut 282 and the holding part 222 (a part of the inner surface of the hole) may be temporarily fixed using, for example, a viscous material.

  Further, the nut 282 may be prevented from falling off by the frictional force between the insulating member 220 and the nut 282, which is generated by forming the hole serving as the holding portion 222 into a size that fits the nut 282.

  Further, the insulating member 220 in which the nut 282 is embedded may be manufactured by insert molding.

  Thus, the nut 282 is held by the insulating member 220 in a state where at least a part of the nut 282 is inserted into the holding portion 222 that is a hexagonal hole provided in the insulating member 220.

  As a result, the rotation of the nut 282 relative to the insulating member 220 (rotation in the XY plane) is restricted. That is, since the nut 282 is held by the holding portion 222, the bolts 281 and the nut 282 can be easily screwed together.

  Moreover, the insulating member 220 has the engaging part 221 including the part provided in the notch shape from the edge of the insulating member 220 as mentioned above.

  In the present embodiment, as shown in FIG. 2 and FIG. 4A, the engaging portion 221 is a hole provided so as to sandwich the positive electrode terminal 200 in the radial direction from the end edge of the insulating member 220. In this embodiment, a groove reaching a rectangular hole) is provided. That is, as shown in FIG. 2, the insulating member 220 is arranged so that the positive electrode terminal 200 is inserted into the engaging portion 221 from the side of the positive electrode terminal 200 attached to the lid plate 110 of the container 100. Can do.

  Further, a part of the groove in the engaging portion 221 is narrower than the outer diameter of the positive electrode terminal 200 as shown in FIG. Thereby, the insulating member 220 can be engaged with the positive electrode terminal 200. Further, the insulating member 220 engaged with the positive electrode terminal 200 is not easily detached from the positive electrode terminal 200.

  Note that the electrode terminals (the positive electrode terminal 200 and the negative electrode terminal 300) in this embodiment are an example of portions of the energy storage device other than the wall surface of the container.

  As described above, the insulating member 220 can be disposed later on the container 100 in a state where the cover plate 110 is welded to the container body 101, that is, the battery 10 that has completed all assembly work except for the insulating member 220. it can.

  Further, since the insulating member 220 has the engaging portion 221 that engages with the positive electrode terminal 200, the movement in the XY plane is restricted at least at one place. In addition, the insulating member 220 includes a holding portion 222 that holds the nut 282.

  Therefore, the movement of the nut 282 held by the insulating member 220 in the XY plane is restricted. As a result, as shown in FIG. 2, when the metal plate 800 and the connection plate 210 are fastened by the fastening member 280 (the bolt 281 and the nut 282), the positive electrode terminal 200 connected to the connection plate 210 and the connection plate 210. Is restricted.

  That is, the insulating member 220 exerts the effect of preventing the connection plate 210 and the positive electrode terminal 200 from rotating.

  The metal plate 800 is, for example, a bus bar that connects the positive electrode terminal 200 and an electrode terminal of another battery. For example, when the battery 10 is provided as one of a plurality of batteries included in the power storage device, the positive electrode terminal 200 of the battery 10 and the negative electrode terminals of other batteries are separated by the metal plate 800 that is one bus bar. Is connected.

  The metal plate 800 is structurally and electrically connected to the connection plate 210 by screwing a nut 282 into a bolt 281 that has passed through the mounting hole 801 and the through hole 211 of the connection plate 210.

  Insulating members 220 and 320 both employ resin as a base material, and can be elastically deformed to such an extent that the insulating members 220 and 320 can be attached to the container 100.

  A specific example of the material of the insulating members 220 and 320 will be described later with reference to FIG.

  Here, in the present embodiment, the insulating member 220 further includes a contact portion 223. The abutting portion 223 abuts against the wall surface of the container 100, thereby restricting the rotation of the insulating member 220 in a plane (XY plane) intersecting the protruding direction of the positive electrode terminal 200.

  As shown in FIGS. 2 and 4B and 4C, the contact portion 223 is provided in the insulating member 220 as a rib protruding downward from the lower surface edge of the insulating member 220.

  Therefore, the contact part 223 contacts the side wall surface 100a of the container 100 (see FIG. 4B) from the outside. Thereby, the rotation of the insulating member 220 in the XY plane is restricted.

  In addition, the side wall surface 100a is a wall surface parallel to the direction which cross | intersects the main surface 110a which is a surface where the electrode terminal of the container 100 is arrange | positioned.

  As described above, the insulating member 220 according to the present embodiment has the contact portion 223 that contacts the wall surface of the container 100. Thereby, rotation with respect to the container 100 of the insulating member 220 is suppressed more reliably. As a result, the anti-rotation effect for the connection plate 210 and the positive electrode terminal 200 is also improved.

  FIG. 5 is a view for explaining the anti-rotation effect for the connection plate 210 and the positive electrode terminal 200 by the insulating member 220.

  As shown in FIG. 5, when the head of the bolt 281 is rotated clockwise, for example, an external force that moves the bolt 281 in a direction parallel to the XY plane is caused by the rotation axis of the bolt 281 moving. To work. As a result, the external force also acts on the nut 282 screwed with the bolt 281.

  However, the nut 282 is held by the insulating member 220 as shown in FIGS. 2 to 4, and the movement of the insulating member 220 with respect to the container 100 is restricted at least at one place. Therefore, the movement of the nut 282 is restricted.

  Furthermore, in the present embodiment, the insulating member 220 has a contact portion 223 that contacts the wall surface of the container 100. Specifically, the insulating member 220 is provided with a pair of contact portions 223 so as to sandwich the container 100 when viewed from above.

  As a result, the degree of freedom of movement of the insulating member 220 in the XY plane is suppressed as compared with the case where the pair of contact portions 223 is not provided. More specifically, since the insulating member 220 includes the pair of contact portions 223, it is possible to substantially prevent rotation in the XY plane around the positive electrode terminal 200 of the insulating member 220. is there.

  In the present embodiment, the engaging portion 221 of the insulating member 220 is engaged with the cylindrical positive electrode terminal 200.

  However, for example, a concave portion or a convex portion is formed on the peripheral surface of the positive electrode terminal 200, and a part of the engaging portion 221 is caught by the concave portion or the convex portion, thereby substantially rotating the insulating member 220 in the XY plane. It may be prevented.

  Further, for example, an auxiliary member having a shape other than a perfect circle (for example, a polygon) in top view passing through the positive electrode terminal 200 is fixed to the lid plate 110 so as to be sandwiched between the lid plate 110 and the connection plate 210. The engaging member 221 having a shape that fits with the auxiliary member may be engaged with the auxiliary member. By doing so, it is possible to substantially prevent the insulating member 220 from rotating in the XY plane.

  Moreover, when providing the contact part 223 in the insulating member 220, there is no limitation in the number in particular. That is, one or three or more contact portions 223 may be provided on the insulating member 220.

  Further, the size and shape of the contact portion 223 are not limited to the size and shape shown in FIG. For example, the overall shape of the contact portion 223 in the front view does not need to be a rectangle as shown in FIG. 4B, and may be, for example, a semicircle, or a combination of a curve and a curve The shape may be

  As described above, the battery 10 according to the present embodiment includes the insulating member 220 that functions as a detent for the positive electrode terminal 200 and the connection plate 210.

  Thereby, the reliability of the connection part of the connection plate 210 and the positive electrode terminal 200 resulting from fastening the connection plate 210 and the metal plate 800 is reduced, or the positive electrode terminal 200 and the container 100 (the cover plate 110). The deterioration of the airtightness of the is suppressed.

  The insulating member 220 has an engaging portion 221 for attaching to the container 100, and the engaging portion 221 includes a portion provided in a cutout shape from the end edge of the insulating member 220.

  Therefore, retrofitting to the container 100 is possible. That is, the insulating member 220 can be attached to the container 100 as a substantial final step in the manufacture of the battery 10.

  Therefore, for example, a process including a complicated operation such as attachment of the electrode terminal to the lid plate 110 and a process including only an easy operation of attaching the insulating member 220 to the container 100 can be completely separated. Thereby, the efficiency concerning manufacture of the some battery 10 can be improved.

  Further, when the container main body 101 and the lid plate 110 are welded, the insulating member 220 does not exist on the main surface 110 a of the lid plate 110, so that the peripheral edge of the container main body 101 and the edge of the lid plate 110 are completely connected. It is possible to weld around.

  In other words, the welded portion between the container main body 101 and the lid plate 110, that is, the edge of the lid plate 110 can be covered with the insulating member 220.

  As a result, for example, as shown in FIG. 4A, when the battery 10 is viewed from the side where the metal plate 800 is disposed, the insulating member 220 is at least the metal plate 800 and the main surface 110a of the container 100. It can arrange | position so that the area | region where and may overlap.

  Thereby, even if the battery 10 to which the metal plate 800 is connected is placed in an abnormal state in which the metal plate 800 or the battery 10 is deformed by a strong impact, the container 100 and the metal plate Generation | occurrence | production of the short circuit between 800 is suppressed.

  The battery 10 may include an insulating member having a shape different from the shape of the insulating member 220 shown in FIG. Therefore, in the following, various modified examples related to the insulating member 220 in the embodiment will be described focusing on differences from the above embodiment.

(Modification 1)
FIG. 6 is a diagram illustrating an insulating member 250 according to the first modification of the embodiment.

  A part of the insulating member 250 shown in FIG. 6 is disposed between the container 100 and the connection plate 210 on the positive electrode side, and the other part is disposed between the container 100 and the connection plate 310 on the negative electrode side. And has a function as a detent for the positive side member and the negative side member.

  Specifically, the insulating member 250 includes a holding part 253 that holds a part of the fastening member 280, a holding part 254 that holds a part of the fastening member 380, and an engaging part 251 that engages with the positive electrode terminal 200. And an engaging portion 252 that engages with the negative electrode terminal 300.

  That is, a part of the insulating member 250 that functions as a detent for the positive-side member is disposed between the container 100 and the connection plate 310, and by holding a part of the fastening member 380, the fastening member 380 The movement of the negative electrode terminal 300 in the direction intersecting the protruding direction is restricted.

  The holding portions 253 and 254 are realized by a hexagonal bottomed hole that matches a nut (282, 382) having an outer shape that is hexagonal like the holding portion 222 in the embodiment shown in FIGS. Has been.

  The insulating member 250 further includes contact portions 255 and 256 that contact the side wall surface 100a of the container 100 from the outside.

  Although not shown in FIG. 6, for example, the contact portions 255 and 256 are also arranged on the lower surface edge of the insulating member 250 on the back side.

  Thus, the insulating member 250 in this modification has a structure in which the insulating member 220 and the insulating member 320 in the above embodiment are connected.

  When attaching the insulating member 250 having such a structure to the container 100 in which the positive electrode terminal 200 or the like is disposed, for example, first, the nut 282 is held by the holding portion 253 of the insulating member 250 and the nut 382 is held by the holding portion 254. Let

  Further, the engaging portion 251 is inserted between the connection plate 210 and the container 100, and the engaging portion 251 is engaged with the positive electrode terminal 200. In this state, the insulating member 250 is bent so as to be convex upward, the engaging portion 252 is inserted between the connection plate 310 and the container 100, and the engaging portion 252 is engaged with the negative electrode terminal 300.

  For example, by such a procedure, the insulating member 250 can be retrofitted to the container 100, and then the external conductive member and the connection plate 210 (310) are fastened using the bolt 281 (381) (for example, (See FIG. 2).

  During the fastening, the insulating member 250 restricts the fastening member 280 (380) from moving in the direction intersecting the protruding direction of the electrode terminals (200, 300). As a result, the rotation of the connection plate 210 (310) and the electrode terminals (200, 300) is suppressed.

  Here, as shown in FIG. 6, the movement of the insulating member 250 in this modification is restricted by two places (the positive terminal 200 and the negative terminal 300) other than the wall surface of the container 100. Therefore, the rotation of the insulating member 250 in the XY plane with the positive electrode terminal 200 or the negative electrode terminal 300 as an axis can be substantially prevented only by regulation by two places other than the wall surface of the container 100. .

  Further, since the insulating member 250 includes at least one abutting portion (for example, the abutting portion 255 shown in FIG. 6), the rotation of the insulating member 250 with respect to the container 100 is more reliably suppressed, and as a result, the connection The anti-rotation effect for the plate 210 (310) and the electrode terminals (the positive terminal 200 and the negative terminal 300) is also improved.

  Note that a procedure for bending the insulating member 250 occurs when the insulating member 250 is retrofitted to the container 100. Therefore, in order to facilitate this bending (bending), the insulating member 250 may have a thin portion.

  FIG. 7 is a view showing an appearance when the insulating member 250 shown in FIG. 6 has a thin portion 258.

  As shown in FIG. 7, the insulating member 250 is provided with a thin portion 258 at a position between the positive electrode terminal 200 and the negative electrode terminal 300 when the insulating member 250 is attached to the container 100.

  Thereby, since the bending of the insulating member 250 is facilitated, the efficiency of the retrofitting operation of the insulating member 250 to the container 100 is improved.

(Modification 2)
In the above embodiment, the engaging portion 221 included in the insulating member 220 is engaged with the electrode terminal. However, the engaging portion may engage with a portion other than the electrode terminal. For example, the engaging portion of the positive insulating member may be engaged with the negative insulating member.

  FIG. 8 is a top view showing the shapes of various insulating members in Modification 2 of the embodiment.

  The insulating member 520 shown in FIG. 8A has an engaging portion 525 that engages with the insulating member 620 on the negative electrode side in addition to the engaging portion 521 that engages with the positive electrode terminal 200.

  Specifically, the engaging portion 525 of the positive-side insulating member 520 and the engaging portion 625 of the negative-side insulating member 620 are fitted to each other in a top view as shown in FIG. It has an irregular shape that fits.

  Thus, one of the insulating member 520 and the insulating member 620 functions as a member that restricts the other rotation. As a result, the restriction of movement of the fastening member 280 held by the insulating member 520 and the fastening member 380 held by the insulating member 620 in the direction intersecting the protruding direction of the electrode terminals (200, 300) is more reliable. To be done.

  Here, the shape of the engaging portion for engaging the two insulating members with each other is not limited to the shape shown in FIG.

  For example, like the insulating members 530 and 630 shown in FIG. 8B, the hook-shaped engaging portions 535 and 635 are fitted to each other so that the insulating member 530 and the insulating member 630 are engaged with each other. Also good.

  Further, for example, as shown in FIG. 8C, the insulating member 540 includes an engaging portion 545 having a shape protruding in the reverse direction (negative electrode), and the insulating member 640 includes the engaging portion 545. You may have the engaging part 645 containing the recessed part of the shape to fit. Even in this configuration, one of the insulating member 540 and the insulating member 640 functions as a member that restricts rotation of the other.

  One of the positive side insulating members (520, 530, 540) and the negative side insulating members (620, 630, 640) shown in FIG. 8 is from the upper side (Z-axis positive direction) to the other side. It is a shape that can be fitted in.

  Therefore, after one of the positive-side insulating member (520, 530, 540) and the negative-side insulating member (620, 630, 640) is attached to the container 100, the other can be attached to the container 100. is there. That is, any of these insulating members can be retrofitted to the container.

  Although not shown in FIG. 8, each of the insulating members shown in FIG. 8 may be provided with at least one contact portion (see, for example, the contact portion 223 in FIG. 2).

  Further, each of the insulating members shown in FIG. 8 may not have the engaging portions (521, 531, 541, 621, 631, 641) that engage with the electrode terminals.

  For example, it is assumed that the insulating member 520 shown in FIG. 8A has a pair of contact portions 223 (see FIGS. 4B and 4C) arranged so as to sandwich the container 100 therebetween.

  In this case, for example, the pair of contact portions 223 can temporarily fix the insulating member 520 to the container 100 and position the Y-axis direction. Further, the insulating member 520 can be positioned in the X-axis direction by bringing the left end of the insulating member 520 into contact with the positive electrode terminal 200. For example, in such a case, the insulating member 520 may not have the engaging portion 521 that engages with the positive electrode terminal 200.

  One of the positive-side insulating members (520, 530, 540) and the negative-side insulating members (620, 630, 640) described above is an example of the first insulating member, and the other is the second insulating member. It is an example.

(Modification 3)
In the above embodiment, the abutting portion 223 of the insulating member 220 abuts on the side wall surface 100a (see FIG. 4B) of the container 100 from the outside. However, the contact portion may be provided on the insulating member so as to contact a wall surface other than the side wall surface 100a of the container. For example, the contact portion may be provided on the insulating member so as to contact the inner wall surface of the container 100.

  FIG. 9 is a cross-sectional view of an insulating member 260 in Modification 3 of the embodiment. The cross section shown in FIG. 9 is a cross section at a position corresponding to the AA cross section in FIG.

  As shown in FIG. 9, for example, when the lid plate 110 has a concave shape, the container 100 has an inner wall surface 100 b that is a wall surface standing from the edge of the main surface 110 a.

  In this case, both side surfaces of the insulating member 260 in the Y-axis direction function as the contact portions 223a. That is, the abutting portion 223a abuts against the inner wall surface 100b from the inside, whereby the rotation of the insulating member 260 in the plane intersecting the protruding direction of the positive electrode terminal 200 is restricted. As a result, the anti-rotation effect for the connection plate 210 and the positive electrode terminal 200 is improved.

  The insulating member 260 may further include a contact portion 223 that contacts the side wall surface 100a of the container from the outside. Thereby, the anti-rotation effect about the connection board 210 and the positive electrode terminal 200 by the insulating member 260 can further be improved.

(Modification 4)
In the above embodiment, the fastening member 280 is disposed inside the positive electrode terminal 200 in the battery 10 (see, for example, FIG. 1). However, the insulating member 220 can be retrofitted to a battery having a structure in which the fastening member 280 is disposed outside the positive electrode terminal 200.

  FIG. 10 is a side view showing the insulating member 220 of the battery 11 and the peripheral side surface thereof in Modification 4 of the embodiment.

  The battery 11 shown in FIG. 10 has a connecting plate 210 that extends outward (left side in FIG. 10) at the end of the positive electrode terminal 200, and a fastening member 280 is disposed outside the positive electrode terminal 200.

  Thus, even if the fastening member 280 is disposed outside the positive electrode terminal 200, the insulating member 220 holding the nut 282 is connected between the connection plate 210 and the container 100 from the outside of the battery 11. By inserting, it is possible to retrofit the insulating member 220 to the container 100.

(Modification 5)
In the above embodiment, the insulating member 220 holds the nut 282 that is a part of the fastening member 280. However, the insulating member 220 may hold the bolt 281 that is a part of the fastening member 280.

  FIG. 11 is a diagram showing a schematic configuration of the battery 12 in Modification 5 of the embodiment.

  In FIG. 11, the container 100 is indicated by a dotted line, and the inside of the container 100 is seen through.

  The battery 12 shown in FIG. 11 includes a connection plate 210a having a groove 212 as a characteristic configuration. The insulating member 220 holds the bolt 281 in an upright state.

  Specifically, the head of the bolt 281 is inserted into the holding portion 222 of the insulating member 220, and the bolt 281 is held by the insulating member 220 in this state.

  Further, the connection plate 210a is formed with a groove 212 extending from the end edge of the connection plate 210a to a position where the bolt 281 penetrates. Therefore, the insulating member 220 that holds the bolt 281 in an upright state can be inserted between the connection plate 210 a and the container 100.

  That is, the insulating member 220 can be attached to the container 100 by inserting the bolt 281 into the groove 212 from the opening of the groove 212 present at the right end of the connection plate 210a in FIG.

  That is, the insulating member 220 that holds the bolt 281 in an upright state can be retrofitted to the container 100.

  After the insulating member 220 is attached to the container 100 in this way, the metal plate 800 is disposed so that the bolt 281 penetrates the attachment hole 801 of the metal plate 800, and the metal plate 800 and the connection plate 210a are connected by the nut 282. Conclude.

  At the time of this fastening, as described in the above embodiment and the like, the insulating member 220 restricts the movement of the fastening member 280 in the direction intersecting the protruding direction of the positive electrode terminal 200. As a result, the rotation of the connection plate 210a and the positive electrode terminal 200 is suppressed.

(Insulating material)
Insulating members such as the insulating member 220 in the embodiment described above and the modifications 1 to 5 thereof are made of, for example, a composite material of a resin and an inorganic material. Thereby, the improvement of the intensity | strength as rotation prevention of members, such as an electrode terminal, and the improvement of the reliability of electrical insulation between the container 100 and other members are achieved.

  Hereinafter, examples of materials that can be adopted as the material by the insulating member such as the insulating member 220 will be described.

  FIG. 12 is a schematic diagram illustrating a configuration example of the insulating member 220 according to the embodiment.

  As shown to (a) of FIG. 12, the insulating member 220 may be comprised by disperse | distributing and containing (beta) which is a particulate inorganic material in (alpha) which is resin.

  In addition, as shown in FIG. 12B, the insulating member 220 may be configured by dispersing γ, which is a fibrous inorganic material, in α, which is a resin.

  In addition, resin employ | adopted as (alpha) is the heat resistant resin illustrated below, for example.

  That is, polyvinyl alcohol (PVA), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyimide, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyetherimide (PEI), polyphenylsulfone ( PPSU), polyamideimide (PAI), polyethersulfone (PES), polysulfone (PSF), polyacrylate (PAR), liquid crystal polyester (LCP), melamine resin (MF), phenol resin (PF), silicone resin (SI) ), Epoxy resin (EP), and the like are exemplified as a heat-resistant resin employed as a part of the material of the insulating member 220.

  In addition, as a fluororesin that is a kind of heat-resistant resin, polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / ethylene copolymer (ETFE), tetrafluoro Examples thereof include ethylene / perfluoroalkyl vinyl ether copolymer (FEP) and polychlorotrifluoroethylene (PCTFE).

  Also, a non-heat resistant resin may be adopted as α. Examples of the non-heat resistant resin employed as α include polyethylene (PE), polypropylene (PP), polystyrene, ABS resin, polyvinyl chloride, polystyrene, methacrylic resin, celluloses, and rubbers.

  Further, as β, which is a particulate inorganic material, for example, particulate ceramic is employed. Ceramics adopted as β include oxide ceramics such as alumina, silica, titania, zirconia, magnesia, ceria, yttria, zinc oxide, and iron oxide, and nitriding such as silicon nitride, titanium nitride, and boron nitride Physical ceramics are exemplified.

  Other ceramics used as β include silicon carbide, calcium carbonate, aluminum sulfate, aluminum hydroxide, potassium titanate, talc, kaolin clay, kaolinite, halloysite, pyrophyllite, montmorillonite, sericite, mica. Amesite, bentonite, zeolite, calcium silicate, magnesium silicate, diatomaceous earth, silica sand and the like are exemplified.

  Examples of γ that is a fibrous inorganic material include glass fiber, rock wool, carbon fiber, and ceramic fiber.

  When the insulating member 220 includes ceramic particles or fibers, it is assumed that the electrolyte of the battery 10 has leaked from the container 100. In this case, the acid content generated by hydrolysis of the electrolyte contained in the electrolyte is reduced. The effect of trapping by particles or fibers can be expected.

  In addition, for example, by employing a water-repellent resin as a resin constituting a part of the material of the insulating member 220, it is possible to suppress the occurrence of condensation on the surface of the insulating member 220.

  The illustrations and effects of the material of the insulating member 220 described above are also applied to the other insulating members such as the insulating member 320 in the embodiment and the insulating member 250 in the first modification.

(Supplement of embodiment and modification)
As above, the power storage element according to one embodiment of the present invention has been described based on the embodiment and the modification thereof. However, the present invention is not limited to these embodiments and modifications thereof. As long as it does not deviate from the gist of the present invention, various modifications conceived by those skilled in the art may be applied to the present embodiment or its modifications, or a structure constructed by combining a plurality of constituent elements described above. Included within the scope of the invention.

  For example, a member having the same shape as the insulating member 220 in the embodiment and having a low insulating property or a non-insulating property may be disposed in the battery 10 as the restricting member similarly to the insulating member 220. Thereby, the anti-rotation effect about the above-mentioned connection board 210 and the positive electrode terminal 200 can be acquired.

  In this case, if an insulator such as a resin is present between the regulating member and the container 100 of the battery 10, electrical insulation between the regulating member and the container 100 is ensured.

  The matter relating to the regulating member is also applied to each of the insulating members in the various modifications.

  In addition, for example, the battery 12 in Modification 5 shown in FIG. 11 may include an insulating member 520 shown in FIG. 8A instead of the insulating member 220.

  Further, for example, the structure on the negative electrode side of the battery 12 in Modification 5 shown in FIG. 11 may be the same as that of the battery 10 in the embodiment shown in FIG. That is, a battery having a structure in which the positive-side insulating member 220 holds the bolt 281 and the negative-side insulating member 320 holds the nut 382 can be realized.

  The present invention can provide an energy storage device that can suppress the occurrence of unnecessary displacement of members such as electrode terminals and can be efficiently manufactured. Therefore, the power storage device according to the present invention is useful as a power storage device mounted on an automobile or the like.

10, 11, 12 Battery 100 Container 100a Side wall surface 100b Inner wall surface 101 Container body 110 Cover plate 110a Main surface 120 Positive electrode current collector 130 Negative electrode current collector 200 Positive electrode terminal 210, 210a, 310 Connection plate 211 Through hole 212 Groove 220, 250, 260, 320, 520, 530, 540, 620, 630, 640 Insulating member 221, 251, 252, 321, 521, 525, 531, 535, 541, 545, 621, 625, 631, 635, 641, 645 Engagement part 222, 253, 254 Holding part 223, 223a, 255, 256 Contact part 258 Thin part 280, 380 Fastening member 281, 381 Bolt 282, 382 Nut 300 Negative electrode terminal 400 Electrode body 800 Metal plate 801 Mounting hole

Claims (11)

A storage element,
A container for housing the electrode body;
A first terminal that is electrically connected to the electrode body and is one of a positive terminal and a negative terminal provided protruding from the container;
A first connection plate connected to the first terminal;
A first fastening member for fastening the first connection plate and a conductive member outside the power storage element;
At least a part of the first fastening member is disposed between the container and the first connection plate, and crosses the protruding direction of the first terminal of the first fastening member by holding a part of the first fastening member. A first regulating member that regulates movement in the direction,
The first restricting member is an engaging portion including a portion provided in a cutout shape from an edge of the first restricting member, and is an engagement portion that engages with a portion other than the wall surface of the container of the power storage element. With the joint,
By abutting the wall surface of the container, have a contact portion for restricting the rotation of said first stop member, in a plane that intersects the protruding direction of the first terminal,
The first regulating member is a power storage element that is an insulating member . A storage element,
A container for housing the electrode body;
A first terminal that is electrically connected to the electrode body and is one of a positive terminal and a negative terminal provided protruding from the container;
A first connection plate connected to the first terminal;
A first fastening member for fastening the first connection plate and a conductive member outside the power storage element;
At least a part of the first fastening member is disposed between the container and the first connection plate, and crosses the protruding direction of the first terminal of the first fastening member by holding a part of the first fastening member. A first regulating member that regulates movement in the direction,
The first restricting member is an engaging portion including a portion provided in a cutout shape from an edge of the first restricting member, and has an engaging portion that engages with the first terminal of the power storage element. Power storage element. The abutting portion abuts from the outside on a side wall surface that is a wall surface parallel to a direction intersecting with a main surface on which the first terminal is disposed of the container. The electric storage element according to claim 1, wherein rotation in the plane is restricted. The abutting portion abuts from the inside on an inner wall surface, which is a wall surface standing from an edge of the main surface on which the first terminal is disposed, of the container. The electric storage element according to claim 1, wherein rotation in the plane is restricted. further,
A second terminal which is the other of the positive terminal and the negative terminal;
A second connection plate connected to the second terminal;
A second fastening member for fastening the second connection plate and a conductive member outside the power storage element;
At least a part is disposed between the container and the second connection plate, and by holding a part of the second fastening member, the second fastening member intersects the protruding direction of the second terminal. A second restricting member that restricts movement in the direction,
The said engagement part of said 1st control member engages with said 2nd control member which is parts other than the wall surface of the said container of the said electrical storage element. Power storage element. further,
A second terminal which is the other of the positive terminal and the negative terminal;
A second connection plate connected to the second terminal;
A second fastening member for fastening the second connection plate and a conductive member outside the power storage element;
A part of the first restricting member is disposed between the container and the second connection plate, and the second terminal of the second fastening member is held by holding a part of the second fastening member. The electrical storage element of any one of Claims 1-4 which regulates the movement to the direction which cross | intersects the protrusion direction. The power storage device according to claim 6, wherein the first restriction member has a thin portion that facilitates bending of the first restriction member at a position between the first terminal and the second terminal. The power storage element according to any one of claims 1 to 7, wherein the first regulating member is made of a composite material of a resin and an inorganic material. The first fastening member includes a bolt and a nut,
The power storage device according to claim 1, wherein the first regulating member holds the nut that is a part of the first fastening member. The first fastening member includes a bolt and a nut,
The first regulating member holds the bolt that is a part of the first fastening member in an upright state,
The storage element according to any one of claims 1 to 8, wherein a groove extending from an edge of the first connection plate to a position through which the bolt passes is formed in the first connection plate. The conductive member connected to the first connection plate is a metal plate,
The first regulating member has at least the metal plate and a main surface that is a surface on which the first terminal of the container protrudes when the power storage element is viewed from the side where the metal plate is disposed. The electric storage element according to claim 1, wherein the electric power storage element is disposed so as to cover an overlapping region.

Images