JP2017016885A - Power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device capable of improving workability at the assembly of a power storage device.SOLUTION: A power storage device 1, which includes a power storage element 40 and an outer package 10, further includes a bottom surface side disposition member 20 which holds the power storage element 40. The outer package 10 includes, on the bottom wall face thereof, a restriction part 150 which restricts the movement of the bottom surface side disposition member 20 in a direction along the bottom wall surface. The bottom surface side disposition member 20 is smaller than the outer package 10 and disposed in a deviating manner to the outer package 10. An L-shaped space is formed between the bottom surface side disposition member 20 and the outer package 10.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a power storage device including a power storage element and an exterior body.

  2. Description of the Related Art Conventionally, in a power storage device including a power storage element, a configuration in which the power storage element is accommodated inside the exterior body is known (see, for example, Patent Document 1).

JP 2013-73918 A

  In the conventional power storage device, the size of the exterior body and the size of the power storage element have a corresponding relationship. For this reason, when assembling the power storage device, it is difficult to arrange other parts other than the power storage element in the exterior body, and the workability during assembly of the power storage device may be reduced.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a power storage device that can improve workability during assembly.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention is a power storage device including a power storage element and an exterior body, and includes a holding member that holds the power storage element. A wall surface of the exterior body has a restricting portion that restricts movement of the holding member in a direction along the wall surface, and the holding member is smaller than the exterior body and is arranged to be biased with respect to the exterior body An L-shaped space is formed between the holding member and the exterior body.

  According to this, in the power storage device, since the holding member is smaller than the exterior body and is disposed so as to be biased with respect to the exterior body, an L-shaped space is provided between the holding member and the exterior body. Is formed. Thus, since a space can be formed between at least two surfaces of the holding member and the inner surface of the exterior body, the space between the retention member and the exterior body can be increased. Thereby, arrangement | positioning of components other than an electrical storage element can be made easy, and the workability | operativity at the time of an assembly of an electrical storage apparatus can be improved.

  Further, the restricting portion may restrict movement of the holding member by engaging with a part of the holding member.

  According to this, the restricting portion restricts the movement of the holding member by engaging with a part of the holding member. For this reason, the restriction | limiting of the movement of the holding member in the direction along a wall surface is realizable with a simple structure.

  Further, the restricting portion may be a convex portion protruding from the wall surface.

  According to this, the convex part provided protruding from the wall surface of the exterior body engages with the holding member, thereby restricting the movement of the holding member. For this reason, the restriction | limiting of the movement of the holding member in the direction along a wall surface is realizable with a simple structure.

  The holding member may have an opening that fits into the convex portion.

  According to this, since the convex part provided in the wall surface of the exterior body fits in the opening part of a holding member, the movement in the direction along the wall surface of an exterior body can be controlled effectively.

  Furthermore, you may provide the fixing member connected to the said convex part and fixing the said holding member.

  According to this, the holding member can be fixed by connecting the fixing member to the convex portion from the inside of the power storage device, and the holding member does not have to be fixed to the exterior body using the fixing member from the outside of the exterior body. . For this reason, the workability | operativity at the time of an assembly can be improved.

  According to the present invention, workability at the time of assembling the power storage device can be improved.

It is a perspective view which shows the external appearance of the electrical storage apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which shows each component at the time of decomposing | disassembling the electrical storage apparatus which concerns on embodiment of this invention. It is a perspective view which shows the structure of the electrical storage element which concerns on embodiment of this invention. It is a perspective view which shows the structure before a bottom face side arrangement | positioning member is fixed to the exterior body main body which concerns on embodiment of this invention. It is a perspective view which shows the structure after the bottom face side arrangement | positioning member was fixed to the exterior body main body which concerns on embodiment of this invention. It is a top view which shows the structure after the bottom face side arrangement | positioning member was fixed to the exterior body main body which concerns on embodiment of this invention. It is sectional drawing when the structure after a bottom face side arrangement | positioning member is fixed to the exterior body main body which concerns on embodiment of this invention is cut | disconnected by the XZ plane. It is sectional drawing when the electrical storage apparatus which concerns on embodiment of this invention is cut | disconnected by XZ plane. It is a figure for demonstrating an example of the relationship between the control part of a bottom wall and the opening part of a bottom face side arrangement | positioning member based on other embodiment of this invention. It is a figure for demonstrating other examples of the relationship between the control part of a bottom wall and the opening part of a bottom face side arrangement | positioning member based on other embodiment of this invention. It is a figure for demonstrating other examples of the relationship between the control part of a bottom wall and the opening part of a bottom face side arrangement | positioning member based on other embodiment of this invention. It is a figure for demonstrating other examples of the relationship between the control part of a bottom wall and the opening part of a bottom face side arrangement | positioning member based on other embodiment of this invention. It is a figure for demonstrating other examples of the relationship between the control part of a bottom wall and the opening part of a bottom face side arrangement | positioning member based on other embodiment of this invention.

  Hereinafter, a power storage device according to an embodiment of the present invention will be described with reference to the drawings. The embodiment described below shows a specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements according to the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. Moreover, each figure is a figure for description of an electrical storage apparatus, and does not necessarily show exactly | strictly.

(Embodiment)
First, the configuration of the power storage device 1 will be described.

  FIG. 1 is a perspective view showing an appearance of power storage device 1 according to the embodiment of the present invention. FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment of the present invention is disassembled.

  In these figures, the Z-axis direction is shown as the vertical direction, and the Z-axis direction will be described below as the vertical direction. However, depending on the usage, the Z-axis direction may not be the vertical direction. The axial direction is not limited to the vertical direction. For example, the X axis direction may be the vertical direction. The same applies to the following drawings.

  The power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside. For example, the power storage device 1 is a battery module used for power storage use, power supply use, and the like. Among these, the power storage device 1 according to the present embodiment is suitably used as a stationary power supply device.

  First, as shown in FIG. 1, the power storage device 1 includes an exterior body 10 including an exterior body main body 100, a front wall portion 200, and an upper wall portion 300. As shown in FIG. 2, the power storage device 1 includes a bottom surface side arrangement member 20, a power storage element 40, a terminal side arrangement member 50, a bus bar 60, a wiring board 70, and the inside of the exterior body 10. A measurement board 81 and a main circuit board 82 are provided.

  The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1. The exterior body 10 arranges the power storage element 40 and the board (the wiring board 70, the measurement board 81, and the main circuit board 82) and the like at predetermined positions, and protects the power storage element 40 and the board from an impact or the like. The exterior body 10 is made of a highly rigid material such as a metal such as aluminum or iron. The package 10 may be made of a resin material such as polypropylene (PP), polycarbonate (PC), polybutylene terephthalate (PBT), or ABS resin.

  Here, the exterior body 10 includes an exterior body main body 100, a front wall portion 200, and an upper wall portion 300. The exterior body main body 100 is a member constituting the body of the exterior body 10, and includes a rectangular bottom wall and three rectangular side walls erected from the bottom wall. The exterior body main body 100 has a shape obtained by bending a plate-like member. The front wall portion 200 is a rectangular and plate-like member that forms another side wall of the exterior body 10. That is, the exterior body main body 100 and the front wall portion 200 form a bottomed rectangular cylindrical member. Note that a handle may be provided on the outer surface of the front wall portion 200. Thereby, removal or movement (carrying) of the power storage device 1 can be easily performed. The details of the configuration of the exterior body main body 100 will be described later.

  The upper wall portion 300 is a member that constitutes the upper wall (lid) of the exterior body 10, and is a rectangular and plate-like shape that closes the opening of the bottomed rectangular cylindrical member formed of the exterior body main body 100 and the front wall portion 200. It is a member. That is, in a state where the storage element 40, the substrate (the wiring substrate 70, the measurement substrate 81, and the main circuit substrate 82) are disposed inside the exterior body main body 100 and the front wall portion 200, the opening portion is the upper wall portion. It is closed at 300.

  The bottom surface arrangement member 20 is a flat rectangular member disposed on the bottom surface side of the power storage element 40 and is a holding member that holds the power storage element 40. That is, the bottom surface side arrangement member 20 is mounted on the bottom wall of the exterior body main body 100 and attached to the bottom wall, and holds the power storage element 40 at a predetermined position with respect to the exterior body 10.

  Specifically, the bottom surface side arrangement member 20 is made of an insulating material, and the power storage element 40 is inserted into a recess formed on the top surface to fix the power storage element 40 in the exterior body 10. In this way, the bottom surface side arrangement member 20 prevents the power storage element 40 from coming into contact with a conductive member such as the outer package 10 and protects the power storage element 40 and the like from vibration and impact.

  The bottom-surface-side arrangement member 20 may be formed of any insulating material, but for example, polybutylene terephthalate (GF reinforced PBT) reinforced with glass fiber, polyphenylene sulfide (PPS), or the like. It is preferably formed of a resin having high heat resistance. Thereby, even when the power storage element 40 generates heat, it is possible to suppress the bottom surface side arrangement member 20 from being damaged and affecting other power storage elements 40. In addition, as long as the insulation of the electrical storage element 40 can be ensured, the bottom face side arrangement | positioning member 20 does not need to be formed with an insulating material.

  The storage element 40 is a secondary battery (unit cell) that can charge and discharge electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. .

  In the present embodiment, 13 power storage elements 40 are accommodated in the outer package 10, but another power storage element 40 is added to the vacant space to accommodate 14 power storage elements 40. But it doesn't matter. Alternatively, the number of power storage elements 40 accommodated in the outer package 10 may be a plurality other than the above, or may be one. Moreover, the electrical storage element 40 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery or a capacitor. Details of the configuration of the storage element 40 will be described later.

  The terminal side arrangement | positioning member 50 is a flat rectangular member arrange | positioned at the electrode terminal side of the electrical storage element 40, and hold | maintains the electrical storage element 40 from upper direction. That is, the terminal side arrangement member 50 is arranged above the electricity storage element 40, and the electricity storage element 40 is packaged by sandwiching the electricity storage element 40 from the upper and lower sides (both sides in the Z-axis direction) together with the bottom surface side arrangement member 20. Hold the body 10 at a predetermined position.

  Specifically, the terminal-side arrangement member 50 is made of an insulating material, and the power storage element 40 is inserted into a recess formed on the lower surface to fix the power storage element 40 in the exterior body 10. In this way, the terminal-side arrangement member 50 prevents the power storage element 40 from coming into contact with a conductive member such as the exterior body 10 and protects the power storage element 40 and the like from vibration and impact.

  The bus bar 60 and the wiring board 70 are placed on the terminal side arrangement member 50. That is, the terminal-side arrangement member 50 also has a positioning function with respect to the power storage element 40 when the bus bar 60 and the wiring board 70 are attached to the power storage element 40.

  The terminal side arrangement member 50 may be formed of any insulating material, but from the viewpoint of reducing the manufacturing cost, for example, polypropylene (PP), polycarbonate (PC), ABS resin, or the like. It is preferable to form with resin. Note that the terminal-side arrangement member 50 may not be formed of an insulating material as long as the insulating properties of the power storage element 40, the bus bar 60, and the like can be ensured.

  The bus bar 60 is a conductive plate-like member such as a metal that is arranged above the terminal-side arrangement member 50 and electrically connects the plurality of power storage elements 40 to each other. Specifically, the bus bar 60 connects the positive terminal or the negative terminal of one power storage element 40 and the negative terminal or the positive terminal of another power storage element 40 in the adjacent power storage element 40. In the present embodiment, bus bar 60 connects 13 power storage elements 40 in series.

  The wiring board 70 is disposed above the terminal side arrangement member 50. In addition, in order to detect the voltage of the power storage element 40, the wiring board 70 is connected to the electrode terminals of at least one power storage element 40 of the power storage elements 40 included in the power storage device 1 (in this embodiment, all the power storage elements 40). A positive electrode terminal) of which one end is connected. In addition, the wiring board 70 has a rectangular shape and is disposed between the positive electrode terminal and the negative electrode terminal of the power storage element 40. In the present embodiment, two wiring boards 70 are arranged, but the number of wiring boards 70 is not limited. In addition, a harness or the like can be used instead of the wiring board 70. However, by connecting the electrode terminal and the measurement board 81 using the wiring board 70, the wiring can be easily routed and the assembling property is improved. . The wiring board 70 may have a configuration in which a thermistor is mounted and the temperature of the power storage element 40 can be detected.

  The measurement board 81 and the main circuit board 82 are disposed between the power storage element 40 and the side wall of the exterior body 10 and connected to at least one power storage element 40 of the power storage elements 40 included in the power storage device 1. It is a substrate that measures and controls the state of the storage element 40. Specifically, the main circuit board 82 is a board on which main circuit components through which a large current flows is mounted, and is fixed to the inner surface of the side wall of the exterior body 10 that faces the short side surface of the container of the storage element 40. The measurement substrate 81 is a substrate on which peripheral circuit components through which a small current flows is mounted, and is fixed to the inner surface of the side wall of the exterior body 10 facing the long side surface of the container of the power storage element 40.

  Next, the configuration of the storage element 40 will be described in detail.

  FIG. 3 is a perspective view showing a configuration of power storage element 40 according to the embodiment of the present invention.

  As shown in the figure, the storage element 40 includes a container 410, a positive terminal 430, and a negative terminal 440, and the container 410 includes a container lid 420.

  The container 410 includes a casing main body having a rectangular cylindrical shape made of metal and having a bottom, and a metal container lid 420 that closes an opening of the casing main body. In addition, the container 410 can be hermetically sealed by, for example, welding the container lid 420 and the housing body after accommodating the electrode body and the like inside. As described above, the container 410 is a rectangular parallelepiped container having the long side surfaces 411 on the side surfaces on both sides in the Y-axis direction and the short side surfaces 412 on the side surfaces on both sides in the X-axis direction. The material of the container 410 is not particularly limited, but is preferably a weldable metal such as stainless steel or aluminum. Moreover, although an electrode body etc. are arrange | positioned inside the container 410, detailed description is abbreviate | omitted.

  Next, the configurations of the bottom surface side arrangement member 20 and the exterior body main body 100 and an example of the relationship between these members will be described in detail.

  FIG. 4 is a perspective view showing a configuration before the bottom surface side arrangement member 20 is fixed to the exterior body main body 100 according to the embodiment of the present invention. FIG. 5 is a perspective view showing a configuration after the bottom surface side arrangement member 20 is fixed to the exterior body main body 100 according to the embodiment of the present invention. FIG. 6 is a plan view showing a configuration after the bottom surface side arrangement member 20 is fixed to the exterior body main body 100 according to the embodiment of the present invention. 6A is a plan view (viewed from above) when viewed from the positive side in the Z-axis direction, and FIG. 6B is a plan view of FIG. ) Is an enlarged view of a region A1.

  First, the configuration of the bottom surface side arrangement member 20 will be described in detail.

  As shown in FIGS. 4 to 6, the bottom surface side arrangement member 20 includes a holding portion 510 that is a portion that holds the plurality of power storage elements 40, both outer sides in the X axis direction and the negative side in the Y axis direction from the holding portion 510. And a mounted portion 520 that is attached to the bottom wall of the exterior body main body 100.

  A plurality of recesses 511 are formed on the upper surface of the holding portion 510, and a part of the bottom surface side (Z-axis direction minus side) of the power storage element 40 can be inserted into each recess 511. The plurality of recesses 511 hold the plurality of power storage elements 40 by restricting the movement of the plurality of power storage elements 40 inserted into the plurality of recesses 511. Specifically, the plurality of recesses 511 are a plurality of power storage elements 40 in a direction along the inner surface of the bottom wall of the exterior body main body 100 (a surface on the plus side in the Z-axis direction, hereinafter referred to as “bottom wall surface”). Regulate the movement of The plurality of recesses 511 support the bottom surfaces of the plurality of power storage elements 40 from below. Here, the direction along the bottom wall surface specifically refers to the direction along the X-axis direction, the direction along the Y-axis direction, and the component in the X-axis direction and the component in the Y-axis direction. One of the synthesized directions.

  The attached portion 520 is formed with seven openings 521 that penetrate in the thickness direction (Z-axis direction) of the bottom surface side arrangement member 20. In this embodiment, the opening 521 is a through hole having a circular cross section on the inner surface, but the cross sectional shape of the inner surface of the through hole is not limited to a circle, and may be a polygon such as a triangle or a quadrangle. Also good. Further, the number of openings 521 is not limited to seven, and may be a plurality other than seven or one.

  Further, as shown in FIGS. 4 and 6, the attached portion 520 is formed with two protruding portions 522 that protrude toward the side wall 130 (that is, the X axis direction plus side). The two protruding portions 522 protrude from the attached portion 520 by a length substantially equal toward the side wall 130 side. The two protrusions 522 may not be formed on the bottom surface side arrangement member 20.

  Next, the configuration of the exterior body 100 will be described in detail.

  As shown in FIGS. 4 to 6, the exterior body main body 100 includes a bottom wall 110 and side walls 120 to 140. In addition, a regulation unit 150 and a substrate holding unit 160 are provided on the bottom wall surface.

  The bottom wall 110 is a wall (a wall on the negative side in the Z-axis direction) disposed at the bottom of the exterior body main body 100, and has a rectangular shape and a flat plate shape. The side wall 120 is a wall disposed on the side of the exterior body 100 that is erected upward from the edge on the negative side in the X-axis direction of the bottom wall 110 (on the positive side in the Z-axis direction). And it has a flat plate shape. The side wall 130 is a wall disposed on the side portion of the exterior body main body 100 that is erected upward from the edge on the plus side in the X-axis direction of the bottom wall 110 and has a rectangular shape and a flat plate shape. Yes. The side wall 140 is a wall disposed on the side of the exterior body 100 that is erected upward from the edge on the Y axis direction plus side of the bottom wall 110 and has a rectangular shape and a flat plate shape. Yes.

  The restricting portion 150 is a convex portion protruding from the inner surface of the bottom wall 110, and in the present embodiment, seven restricting portions 150 are provided. The seven restricting portions 150 are provided at positions corresponding to the seven openings 521 of the bottom surface side arrangement member 20. Specifically, the restricting portion 150 is a convex portion protruding in a cylindrical shape, and fixes the seven openings 521 of the bottom surface side arrangement member 20 to the bottom wall 110 by a fixing member 170 such as a screw. Further, the number of the restricting portions 150 may be the same as the number of the opening portions 521 of the bottom surface side arrangement member 20, and is not limited to seven, and may be a plurality other than seven or one. May be.

  The restricting portion 150 is, for example, a metal boss, and is fixed integrally with the bottom wall 110 by caulking. Note that the restricting portion 150 may be fixed integrally with the bottom wall 110 by welding. Moreover, the control part 150 may be comprised with materials, such as not only metal but resin.

  The substrate holding unit 160 is a long member provided along the bottom wall surface, and in the present embodiment, four substrate holding units 160 are provided. Two of the four substrate holding portions 160 are elongated members extending along the inner surface of the bottom wall 110 and the inner surface of the front wall portion 200, and the other two are the inner surface and side walls of the bottom wall 110. It is a long member extending along the inner surface of 120.

  Here, a concave portion is formed in the substrate holding portion 160 in the longitudinal direction, and the measurement substrate 81 or the main circuit substrate 82 is inserted into the concave portion. That is, the concave portion is a concave portion into which the measurement board 81 or the main circuit board 82 is removably inserted toward the bottom wall 110.

  Next, the position where the bottom surface side arrangement member 20 is arranged in the exterior body main body 100 will be described in detail.

  As shown in FIGS. 4-6, the bottom face side arrangement | positioning member 20 is mounted in the predetermined position of a bottom wall surface. Specifically, the bottom surface side arrangement member 20 is smaller than the exterior body main body 100 and is disposed at a position biased with respect to the exterior body main body 100. Thereby, an L-shaped space is formed between the bottom surface side arrangement member 20 and the exterior body main body 100. For example, as shown in FIG. 6A, the L-shaped space includes a space S <b> 1 between the end of the bottom side arrangement member 20 on the minus side in the X-axis direction and the side wall 120, and the bottom side arrangement member 20. A space S2 is provided between the Y-axis direction negative end of the front wall 200 and the position where the front wall 200 is disposed.

  Here, as shown to (a) of FIG. 6, the board | substrate holding | maintenance part 160 is arrange | positioned in the position where the L-shaped space of the exterior body main body 100 is formed. That is, the measurement board 81 and the main circuit board 82 connected in an L shape can be arranged in the L-shaped space. For this reason, the L-shaped space formed by arranging the bottom surface side arrangement member 20 holding the electricity storage element 40 at a position biased with respect to the exterior body main body 100 can be effectively utilized, and the electricity storage device 1 can be downsized. Can be achieved. In addition to the measurement board 81 and the main circuit board 82, components such as a relay, a shunt resistor, a hall sensor, and a precharge resistor may be arranged in the L-shaped space. By disposing in this space, the power storage device can be reduced in size.

  Further, as shown in FIG. 6B, the restricting portion 150 restricts the movement of the bottom surface side arrangement member 20 by fitting with the opening 521 which is a part of the bottom surface side arrangement member 20. That is, the bottom surface side arrangement member 20 has an opening 521 that fits into the restriction portion 150.

  In addition, in the bottom surface side arrangement member 20, a restriction portion 150 provided on the bottom wall 110 of the exterior body main body 100 is fitted into each of the plurality of openings 521, and movement along the bottom wall surface is restricted at a plurality of locations. The For this reason, even if force is applied to the bottom surface side arrangement member 20 in the direction along the bottom wall surface, it is possible to suppress rotational movement with one opening 521 as a fulcrum.

  Further, since the restricting portion 150 is fitted in the opening 521, the restricting portion 150 contacts the opening 521 in all directions along the bottom wall surface. Thereby, even if it will be in the case where it will be in the state where force is applied to bottom face side arrangement member 20 from which direction along the bottom wall surface, regulation part 150 will be in the bottom wall surface of bottom face side arrangement member 20. The movement in the direction along can be controlled.

  Next, a configuration in which the bottom surface side arrangement member 20 is fixed to the exterior body main body 100 will be described in detail.

  FIG. 7 is a cross-sectional view of the configuration after the bottom surface side arrangement member 20 is fixed to the exterior body main body 100 according to the embodiment of the present invention, cut along the XZ plane. Specifically, FIG. 7A is a VII-VII cross-sectional view of FIG. 6A, and FIG. 7B is an enlarged view around the fixing member 170 of FIG. 7A. It is. More specifically, FIG. 7B is an enlarged view of the area A1 in FIG.

  As shown in FIG. 7, the bottom-side arrangement member 20 is configured such that the seven fixing members 170 each have seven restriction portions in a state where the opening 521 of the attached portion 520 of the bottom-side arrangement member 20 is penetrated by the restriction portion 150. By being connected to 150, it is fixed to the bottom wall surface. Specifically, the bottom surface side arranging member 20 is fixed to the restriction portion 150 by screwing a fixing member 170 such as a screw or a screw to a female screw portion 151 provided in the restriction portion 150, thereby fixing the bottom wall 110. Fixed to. For this reason, the bottom surface side arrangement | positioning member 20 can be firmly fixed to the bottom wall 110 of the exterior body main body 100 via the control part 150 with the simple and cheap structure.

  The fixing member 170 may be screwed into the female screw portion 151 via a washer (washer) 171 such as a spring washer or a flat washer in order to prevent the female screw portion 151 from being loosened or depressed. Although it is preferable, the washer 171 may not be used.

  Further, the female screw portion 151 that is screwed into the fixing member 170 is provided in the restricting portion 150 protruding from the bottom wall surface. Since the restricting portion 150 protrudes inward from the bottom wall surface in this way, the female screw portion 151 can be provided inside the exterior body main body 100. That is, by fixing the fixing member 170 to the female screw portion 151 from the inside of the exterior body 10, the length of the portion where the fixing member 170 and the female screw portion 151 are screwed can be secured, and the The screwed portion can be disposed inside the exterior body main body 100. For this reason, even if the fixing member 170 is not arranged outside the exterior body 10, the bottom surface side arranging member 20 can be fixed. Further, even when the fixing member 170 is arranged on the inner side, the fixing member 170 does not have a configuration in which the fixing member 170 penetrates the exterior body main body 100 and protrudes from the exterior body main body 100, and the bottom surface side arrangement member 20 and the exterior body main body 100 can be firmly fixed.

  Moreover, the to-be-attached part 520 in which the opening part 521 was formed is arrange | positioned to the side rather than the recessed part 511 of the holding | maintenance part 510, as shown in FIG. For this reason, when viewed from the positive side in the Z-axis direction, the restricting unit 150 restricts movement of the bottom surface side arrangement member 20 in the direction along the bottom wall surface at a position that does not overlap the power storage element 40. As described above, since the restricting portion 150 and the storage element 40 are arranged at positions that do not overlap when viewed from the positive side in the Z-axis direction, the space in the Z-axis direction inside the exterior body 10 is increased by an amount that does not overlap. can do. Further, the size of the exterior body 10 in the Z-axis direction can be reduced by increasing the space in the Z-axis direction. Further, the size of the power storage element in the Z-axis direction can be increased by increasing the space in the Z-axis direction.

  In addition, since the fixing member 170 can be attached at a position that does not overlap the power storage element 40, the fixing member 170 can be attached regardless of the state of arrangement of the power storage element 40 on the bottom surface arrangement member 20. For this reason, working efficiency can be improved.

  Next, the positional relationship in the Z-axis direction among the exterior body 10, the power storage element 40, the bottom surface side arrangement member 20, and the terminal side arrangement member 50 will be described in detail.

  FIG. 8 is a cross-sectional view when power storage device 1 according to the embodiment of the present invention is cut along an XZ plane. Specifically, FIG. 8 is a VIII-VIII cross-sectional view of FIG.

  As shown in FIG. 8, the bottom wall 110 and the top wall portion 300 of the exterior body main body 100 are arranged with the bottom surface side arrangement member 20, the power storage element 40, and the terminal side arrangement member 50 sandwiched in this order. Further, the total of the length (hereinafter referred to as “height”) H1, the height H2 of the storage element 40, and the height H3 of the terminal side arrangement member 50 of the bottom side arrangement member 20 is the bottom wall. 110 and the distance H4 between the upper wall portion 300 and each other. That is, the bottom wall 110 and the top wall portion 300 are arranged so that the bottom surface side arranging member 20, the power storage element 40, and the terminal side arranging member 50 do not expand in the arrangement direction (Z-axis direction).

  Thereby, for example, even if the opening 521 of the bottom surface side arrangement member 20 and the restricting portion 150 of the exterior body main body 100 are not fixed by the fixing member 170, the opening 521 and the restricting portion 150 are fitted. Can maintain the state.

  As described above, according to the power storage device 1 according to the embodiment of the present invention, in the power storage device 1, the bottom surface-side arrangement member 20 is smaller than the exterior body 10 and is biased with respect to the exterior body 10. Therefore, an L-shaped space is formed between the bottom surface side arrangement member 20 and the exterior body 10. As described above, since the space can be formed between the bottom surface side arrangement member 20 and at least two of the inner surfaces of the exterior body 10, the space between the power storage element 40 and the exterior body 10 can be increased. Thereby, arrangement | positioning of the electrical storage element 40 and another component can be made easy, and the workability | operativity at the time of the assembly of the electrical storage apparatus 1 can be improved.

  Further, since the measurement board 81 and the main circuit board 82 are arranged in the L-shaped space, the measurement board 81 and the main circuit board 82 can be arranged apart from the storage element 40. For this reason, it can suppress that the heat from the electrical storage element 40 is transmitted to the said board | substrate, and has an influence on the said board | substrate, and noise is generated in the circuit in the said board | substrate with the electric current which flows from the electrical storage element 40. Can be suppressed. Thereby, according to the electrical storage apparatus 1, the influence on the said board | substrate by the electrical storage element 40 can be suppressed.

  In addition, the restriction portion 150 provided on the bottom wall surface of the exterior body 10 restricts the movement of the bottom surface side arrangement member 20 that holds the power storage element 40 in the direction along the bottom wall surface of the exterior body 10. For this reason, even if it is the electrical storage apparatus 1 of the structure by which L-shaped space is formed, the electrical storage element 40 can be hold | maintained in the predetermined position of the exterior body 10. FIG. Thereby, for example, the mechanical load applied to the connection portion with the power storage element 40 such as the bus bar 60 or the other substrate such as the substrate is affected by the movement of the power storage element 40 toward the space between the exterior body 10. The influence on the power storage device 1 such as the collision of the power storage element 40 with the electric device can be suppressed.

  The restricting portion 150 is a convex portion that protrudes from the bottom wall surface of the exterior body 10. For this reason, the restriction | limiting of the movement in the direction along the bottom wall surface of the bottom face side arrangement | positioning member 20 is realizable with a simple structure.

  Moreover, since the restriction part 150 provided on the bottom wall surface of the exterior body 10 is fitted into the opening of the bottom surface side arrangement member 20, the movement in the direction along the bottom wall surface of the bottom surface side arrangement member 20 is effectively restricted. it can.

  In addition, the fixing member 170 is connected to the restricting portion 150 and fixes the bottom surface side arrangement member 20. In other words, the fixing member 170 can be connected to the regulating portion 150 from the inside of the power storage device 1 to fix the bottom surface side arrangement member 20, and the bottom surface can be used by using the fixing member from the outside of the exterior body 10 (minus side in the Z axis direction). The side arrangement member 20 may not be fixed to the exterior body 10. For this reason, the workability | operativity at the time of an assembly can be improved.

  The power storage device according to the embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. That is, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. In addition, an embodiment constructed by arbitrarily combining the constituent elements included in the above embodiment is also included in the scope of the present invention.

  For example, in the above embodiment, the restricting portion 150 fixes the opening 521 of the bottom surface side arrangement member 20 to the bottom wall 110 with a fixing member 170 such as a screw. However, as shown in FIG. The structure which is not fixed to the bottom wall 110 may be sufficient.

  FIG. 9 is a diagram for explaining an example of the relationship between the restriction portion 150A of the bottom wall 110 and the opening 521 of the bottom surface side arrangement member 20 according to another embodiment of the present invention. Specifically, FIG. 9A is a plan view of a region corresponding to FIG. 6B in a power storage device according to another embodiment. FIG. 9B is a cross-sectional view taken along the line AA in FIG.

  As shown in FIG. 9, the opening 521 of the bottom surface side arrangement member 20 may be configured not to be fixed to the restriction portion 150 </ b> A by the fixing member 170. That is, the female screw portion does not have to be formed in the restricting portion 150A. Even in the restriction portion 150A configured as described above, for example, as illustrated in FIG. 8, if the bottom surface side disposing member 20 is restricted from moving in a direction away from the bottom wall 110, the bottom surface The movement of the side arrangement member 20 in the direction along the bottom wall surface can be effectively restricted.

  Moreover, in the said embodiment and its modification, although the opening part 521 of the bottom face side arrangement | positioning member 20 was a through-hole in which the inner edge part of the opening part 521 continued cyclically | annularly, as shown in FIG. It may be an opening 521B provided in a cutout shape.

  FIG. 10 is a diagram for explaining another example of the relationship between the restriction portion 150 of the bottom wall 110 and the opening portion 521B of the bottom surface side arrangement member 20B according to another embodiment of the present invention. Specifically, FIG. 10A is a plan view of a region corresponding to FIG. 6B in a power storage device according to another embodiment. FIG. 10B is a cross-sectional view taken along the line BB in FIG.

  As shown in FIG. 10, the opening 521B of the bottom surface side arrangement member 20B may be a notch-shaped opening in which the X axis direction minus side is open. The open part is not limited to the minus side in the X-axis direction.

  Moreover, as shown in FIG. 11, the opening part 521C which has not penetrated the bottom face side arrangement | positioning member 20C in the Z-axis direction may be sufficient.

  FIG. 11 is a diagram for explaining another example of the relationship between the restriction portion 150C of the bottom wall 110 and the opening portion 521C of the bottom surface side arrangement member 20C according to another embodiment of the present invention. Specifically, FIG. 11A is a plan view of a region corresponding to FIG. 6B in a power storage device according to another embodiment. FIG. 11B is a cross-sectional view taken along the line CC of FIG.

  As shown in FIG. 11, the opening 521 </ b> C may be a recess that fits with the restriction portion 150 </ b> C provided on the bottom wall 110. Even such a recess has a shape that fits with the restricting portion 150C, and therefore the restricting portion 150C can restrict movement in all directions along the bottom wall surface of the bottom surface side arrangement member 20C.

  Moreover, as shown in FIG. 12, it is good also as a structure by which opening part 521D of bottom face side arrangement | positioning member 20D is fixed by control part 150D itself.

  FIG. 12 is a diagram for explaining another example of the relationship between the restriction portion 150D of the bottom wall 110 and the opening portion 521D of the bottom surface side arrangement member 20D according to another embodiment of the present invention. Specifically, FIG. 12A is a plan view of a region corresponding to FIG. 6B in a power storage device according to another embodiment. FIG. 12B is a cross-sectional view taken along the line DD of FIG.

  As shown in FIG. 12, the restriction portion 150D has a shape in which the tip on the plus side in the Z-axis direction is engaged with the opening 521D. Accordingly, the restriction portion 150D can restrict movement in the direction along the bottom wall surface of the bottom surface side arrangement member 20D, and can also restrict movement in the Z-axis direction.

  Moreover, in the said embodiment and its modification, the control part 150,150A, 150C, 150D is the structure fitted to the opening part 521,521A, 521A, 521D of the bottom face side arrangement | positioning member 20,20A-20D. However, as shown in FIG. 13, the restriction portion 150 </ b> E may be engaged with the opening 521 </ b> E of the bottom surface side arrangement member 20 </ b> E without being fitted.

  FIG. 13 is a diagram for explaining another example of the relationship between the restriction portion 150E of the bottom wall 110 and the opening 521E of the bottom surface side arrangement member 20E in the power storage device according to another embodiment of the present invention. is there. Specifically, FIG. 13A is a plan view of a region corresponding to FIG. 6B in a power storage device according to another embodiment. FIG. 13B is a cross-sectional view taken along line EE in FIG. FIG. 13C is a cross-sectional view taken along the line F-F in FIG.

  As shown in FIG. 13, the opening 521E of the bottom surface side arrangement member 20E is not fitted to the restricting portion 150E, but is engaged with a part of the outer edge of the restricting portion 150E. Furthermore, the bottom surface side arrangement member 20E is fixed to the restriction portion 150E by an opening 523E different from the opening 521E of the bottom surface side arrangement member 20E being penetrated by the fixing member 170. For this reason, the regulation part 150E can regulate the movement in the direction along the bottom wall surface of the bottom surface side arrangement member 20E via the fixing member 170.

  In FIG. 13, the fixing member 170 may not be attached. That is, the female screw portion 151E may not be provided in the restricting portion 150E, and the opening portion 523E may not be formed in the bottom surface side arrangement member 20E. In this case, the bottom surface side arrangement member 20E has openings 521E at four corners in the top view of the bottom surface side arrangement member 20E, and engages with the regulation part 150E in each of the four openings 521E. Preferably there is. In this case, each of the four restricting portions 150E engages with the opening 521E corresponding to the restricting portion 150E in a different direction. For this reason, the four restricting portions 150E can restrict the movement of the bottom surface side arrangement member 20E in all directions along the bottom wall surface.

  Moreover, in the said embodiment and its modification, the control part 150,150A, 150C, 150D, 150E provided in the bottom wall 110 of the exterior body main body 100 is the bottom face side arrangement | positioning member 20 in the direction along a bottom wall surface. , 20B, 20C, 20D, and 20E are restricted, but not limited thereto. For example, the side wall 130 provided in the exterior body main body 100 abuts the side wall 130 in the direction along the bottom wall surface of the protruding portion 522 of the bottom surface side positioning member 20, so that the bottom surface side positioning member in the direction along the bottom wall surface The movement of 20 may be restricted.

  Further, in the above-described embodiment and its modifications, the bottom surface side arrangement member 20 is placed on the bottom wall 110 of the exterior body main body 100, and the restriction portions 150, 150 </ b> A, 150 </ b> C, 150 </ b> D provided on the bottom wall 110. 150E regulates movement in the direction along the bottom wall surface, but is not limited thereto. The bottom surface side arrangement member is not limited to be placed on the bottom wall surface, and may be placed on any wall surface as long as it is the wall surface of the exterior body 100. The movement in the direction along the wall surface of the bottom surface side arrangement member may be restricted.

  Moreover, in the said embodiment and its modification, the bottom face side arrangement | positioning member 20, 20B, 20C, 20D, 20E arrange | positioned at the bottom face side of the electrical storage element 40 is employ | adopted as a holding member holding the electrical storage element 40. FIG. However, the present invention is not limited to this, and the terminal side arrangement member 50 arranged on the terminal side of the electricity storage element 40 may be employed as the holding member. That is, in this case, the movement of the terminal side arrangement member 50 in the direction along the inner surface of the upper wall portion 300 is restricted by the restriction portion provided on the upper wall portion 300. Similarly, as the holding member, a member that holds the side surface (short side surface or long side surface) of the power storage element may be employed.

  Moreover, in the said embodiment and its modification, although the regulation part 150,150A, 150C, 150D, 150E is a convex part which protrudes inward of the exterior body 10 from the bottom wall 110, it is not restricted to this. For example, the opening part provided in the bottom wall may be sufficient. In this case, the bottom-surface-side arrangement member may be formed with a convex portion that fits into an opening provided in the bottom wall.

  Moreover, in the said embodiment and its modification, the opening parts 521, 521B, 521C, 521D, 521E, and 523E are the bottom surface side arrangement | positioning members 20, 20B, 20C, 20D, and 20E, and the restriction parts 150, 150A, 150C, and 150D. , The movement in the direction along the bottom wall surface is restricted by engaging with 150E. However, the bottom surface side arrangement member is not limited to this, and the convex portion as the restriction portion formed on the bottom wall is restricted. And the structure which has the contact part contact | abutted in the direction along a bottom wall surface in the outer edge part of a bottom face side arrangement | positioning member may be sufficient.

  The present invention can be applied to a power storage device including a power storage element and an exterior body.

DESCRIPTION OF SYMBOLS 1 Power storage device 10 Exterior body 20, 20B, 20C, 20D, 20E Bottom side arrangement member 40 Storage element 50 Terminal side arrangement member 60 Bus bar 70 Wiring board 81 Measurement board 82 Main circuit board 100 Exterior body body 110 Bottom wall 120, 130, 140 Side wall 150, 150A, 150C, 150D, 150E Restriction part 151 Female thread part 170 Fixing member 171 Washer 200 Front wall part 300 Upper wall part 410 Container 411 Long side surface 412 Short side surface 420 Container lid part 430 Positive electrode terminal 440 Negative electrode terminal 510 Holding Portion 511 Recessed portion 520 Mounted portion 521, 521B, 521C, 521D, 521E, 523E Opening portion 522 Protruding portion

Claims (5)

A power storage device comprising a power storage element and an exterior body,
A holding member for holding the power storage element;
The exterior body has a regulating portion that regulates movement of the holding member in a direction along the wall surface on the wall surface of the exterior body,
The holding member is smaller than the exterior body and is arranged to be biased with respect to the exterior body,
An L-shaped space is formed between the holding member and the exterior body. The power storage device according to claim 1, wherein the regulating unit regulates movement of the holding member by engaging with a part of the holding member. The power storage device according to claim 1, wherein the restricting portion is a convex portion protruding from the wall surface. The power storage device according to claim 3, wherein the holding member has an opening that fits into the convex portion. further,
The power storage device according to claim 3, further comprising a fixing member that is connected to the convex portion and fixes the holding member.

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