JP6682786B2 - Power storage device and terminal side member - Google Patents

Description

  The present invention relates to a power storage device including a power storage element, and a terminal side arrangement member arranged on the electrode terminal side of the power storage element.

  BACKGROUND ART In a power storage device including a power storage element, a configuration in which electrode terminals of adjacent power storage elements are connected by a bus bar is conventionally known (see, for example, Patent Document 1).

JP, 2010-225583, A

  However, in the above conventional power storage device, the number of power storage elements to be arranged is predetermined and designed in accordance with the number, and thus there is a problem that it is difficult to change the number. That is, in the above-described conventional power storage device, the arrangement of the busbars and the resin member that holds the busbars are designed according to the number of power storage elements. Therefore, to change the number, the shape of the resin member is changed. The need arises.

  The present invention has been made to solve the above problems, and provides a power storage device in which the number of power storage elements can be easily changed, and a terminal side disposition member disposed on the electrode terminal side of the power storage element. The purpose is to

  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 first power storage element having a first terminal that is a positive electrode terminal or a negative electrode terminal, and an external connection terminal. One power storage element is provided with a terminal side placement member that is placed on the side of the first terminal, the terminal side placement member is a second terminal that the first power storage element and a second power storage element different from the first power storage element have. A conductive member accommodating portion capable of accommodating a first conductive member that connects the first conductive member and a second conductive member that connects the first terminal and the external connection terminal to the conductive member accommodating portion. Have and.

  According to this, in the power storage device, the terminal-side arrangement member is a conductive member housing portion that can house a first conductive member that connects the first terminal of the first power storage element and the second terminal of the second power storage element, It has the 1st derivation | leading-out part which can lead out the 2nd electroconductive member which connects a 1st terminal and an external connection terminal from the electroconductive member accommodation part. That is, if the first conductive member is arranged in the conductive member accommodating portion, the second power storage element can be connected to the first power storage element, and if the second conductive member is arranged in the first lead-out portion, the first power storage element is formed. An external connection terminal can be connected to. Therefore, by removing the second storage element and connecting the external connection terminal to the first storage element from the state where the second storage element is connected to the first storage element and the external connection terminal is connected to the second storage element. The number of power storage elements can be reduced. As described above, according to the power storage device, it is possible to easily attach and detach the power storage element, and thus it is possible to easily change the number of power storage elements.

  Further, the conductive member accommodating portion is an opening for arranging a bus bar capable of accommodating a bus bar connecting the first terminal and the second terminal as the first conductive member, and the first lead-out portion is the An opening for terminal connection that can lead out the second conductive member from the first terminal to the external connection terminal, the opening for arranging the bus bar and the opening for terminal connection are the terminal side. It may be an opening that penetrates different portions of the arrangement member in different directions.

  According to this, the conductive member accommodating portion is an opening portion for arranging the bus bar, the first lead-out portion is an opening portion for connecting the terminal, and these two opening portions are formed in different directions in different portions of the terminal side arrangement member. Penetrates into. That is, for example, by opening the conductive member housing portion toward the second power storage element, the first power storage element and the second power storage element can be easily connected via the conductive member housing portion. Further, by opening the first lead-out portion toward the external connection terminal, the first power storage element and the external connection terminal can be easily connected via the first lead-out portion.

  The terminal-side arrangement member may further include a wall formed on the outer periphery of the conductive member accommodating portion, and the first lead-out portion may be formed on the wall.

  According to this, in the terminal side arrangement member, a wall is formed on the outer periphery of the conductive member accommodating portion, and the first lead-out portion is formed on the wall, so when the wall is formed on the outer periphery of the conductive member accommodating portion. However, the first lead-out portion can be easily formed.

  Further, the terminal-side arrangement member may further include a second lead-out portion that can lead out a third conductive member that connects the external connection terminal and the third terminal.

  According to this, the terminal side arrangement member further includes the second lead-out portion that can lead out the third conductive member that connects the external connection terminal and the third terminal of the second power storage element. This allows the second power storage element to be easily connected to the external connection terminal when mounting the second power storage element.

  Further, the power storage device is further provided with a power storage device housing unit for housing the second power storage device, and the power storage device housing unit is arranged at a position adjacent to the first power storage device and closest to the external connection terminal. It may be a housing portion for the power storage element.

  According to this, since the electricity storage element housing portion is arranged at a position adjacent to the first electricity storage element and closest to the external connection terminal, when accommodating the second electricity storage element in the electricity storage element housing portion, The two storage elements can be easily connected to the first storage element and the external connection terminal.

  Further, the first terminal and the external connection terminal may be connected to each other without being connected to the second terminal and the third terminal.

  According to this, the first terminal and the external connection terminal of the first power storage element are connected to each other without being connected to the second terminal and the third terminal of the second power storage element. That is, even when the power storage device is provided with the power storage element housing part for housing the second power storage element, the first power storage element and the external connection terminal are connected without housing the second power storage element. Have a configuration. Thus, according to the power storage device, the number of power storage elements can be reduced from the number that can be accommodated.

  Note that the present invention can be realized not only as such a power storage device but also as a terminal side arrangement member arranged on the electrode terminal side of the power storage element included in the power storage device.

  According to the present invention, it is possible to provide a power storage device capable of easily changing the number of power storage elements.

FIG. 1 is a perspective view showing an external appearance of a power storage device according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing each component when the power storage device according to the embodiment of the present invention is disassembled. It is a perspective view showing the composition of the electric storage element concerning the embodiment of the invention. It is a perspective view showing composition of a terminal side arrangement member concerning an embodiment of the invention. FIG. 3 is a perspective view showing a positional relationship between a terminal side arrangement member, a power storage element and a bus bar according to the embodiment of the present invention. FIG. 3 is a perspective view showing a configuration in which a plurality of power storage elements according to the embodiment of the present invention are connected by a bus bar and a conductive member. FIG. 3 is a plan view showing a configuration in which a plurality of power storage elements according to the embodiment of the present invention are connected by a bus bar and a conductive member. FIG. 3 is a perspective view showing a configuration in the case where the power storage device according to the embodiment of the present invention includes 14 power storage elements. FIG. 3 is a plan view showing a configuration when the power storage device according to the embodiment of the present invention includes 14 power storage elements.

  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 one specific example of the present invention. Numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the constituent elements according to the following embodiments, the constituent elements that are not described in the independent claim showing the highest concept are described as arbitrary constituent elements. In addition, each drawing is a diagram for explaining the power storage device and is not necessarily strictly illustrated.

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

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

  In these drawings, the Z-axis direction is shown as the vertical direction, and the Z-axis direction will be described below as the vertical direction. However, the Z-axis direction may not be the vertical direction depending on the usage mode. 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 figures.

  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, power supply, or the like. Above all, the power storage device 1 according to the present embodiment is preferably used as a stationary power supply device.

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

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

  Here, the exterior body 10 has an exterior body main body 100, a front wall portion 200, and an upper wall portion 300. The exterior body 100 is a member that forms the body of the exterior body 10 and has a rectangular bottom wall and three rectangular side walls that stand upright from the bottom wall. The exterior body 100 has a shape obtained by bending a plate member. The front wall portion 200 is a rectangular and plate-shaped member that forms another side wall of the exterior body 10. In other words, the exterior body 100 and the front wall portion 200 form a bottomed rectangular tubular member.

  Further, the front wall portion 200 is provided with an external connection terminal 210 that is a terminal for connecting to the outside of the power storage device 1. The external connection terminal 210 has a positive electrode side terminal and a negative electrode side terminal. That is, the positive electrode side terminal of the external connection terminal 210 is connected to the positive electrode terminal of any of the power storage elements 40, and the negative electrode side terminal of the external connection terminal 210 is connected to the negative electrode terminal of any of the power storage elements 40.

  The upper wall portion 300 is a member that constitutes the upper wall (lid) of the exterior body 10, and has a rectangular and plate shape that closes the opening of a bottomed rectangular tubular member that includes the exterior body 100 and the front wall portion 200. It is a member. That is, with the storage element 40, the substrate (the wiring board 70, the measurement board 81, and the main circuit board 82) and the like arranged inside the exterior body 100 and the front wall portion 200, the opening is the upper wall portion. It is closed at 300.

  The bottom surface side arrangement member 20 is a flat rectangular member arranged on the bottom surface side of the electricity storage device 40, and supports the electricity storage device 40 from below. That is, the bottom surface side arrangement member 20 is placed on the bottom wall of the exterior body 100, is attached and fixed to the bottom wall, and supports 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 the recess formed on the upper surface to fix the power storage element 40 inside the outer casing 10. In this way, the bottom surface side arrangement member 20 prevents the electricity storage device 40 from coming into contact with a conductive member such as the outer casing 10 and protects the electricity storage device 40 and the like from vibration, impact and the like.

  The bottom surface side member 20 may be made of any insulating material. For example, polybutylene terephthalate (GF reinforced PBT) reinforced with glass fiber, polyphenylene sulfide (PPS), or the like may be used. It is preferably formed of a resin having high heat resistance. Accordingly, even when the power storage element 40 generates heat, it is possible to prevent the bottom surface side arrangement member 20 from being damaged and affecting other power storage elements 40. It should be noted that the bottom surface side disposing member 20 does not have to be formed of an insulating material as long as the insulating property of the electricity storage element 40 can be secured.

  The electricity storage device 40 is a secondary battery (single battery) 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 housed in exterior body 10. However, another power storage element 40 is added to the vacant space to store 14 power storage elements 40. But it doesn't matter. Details will be described later. Further, the electricity storage device 40 is not limited to the 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 member 50 is a flat rectangular member arranged on the electrode terminal side of the electricity storage device 40, and supports the electricity storage device 40 from above. That is, the terminal side arrangement member 50 is arranged above the electric storage element 40, and the electric storage element 40 is sandwiched from both the upper and lower sides (Z-axis direction) together with the bottom surface side arrangement member 20, so that the electric storage element 40 is packaged. Support in place against.

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

  Further, the bus bar 60 and the wiring board 70 are placed on the terminal side arrangement member 50. That is, the terminal side placement member 50 also has a function of positioning the bus bar 60 and the wiring board 70 with respect to the power storage element 40 when the power storage element 40 is attached. The terminal-side arranging member 50 may be made of any insulating material, but is preferably made of a resin such as PP, PE, PC or ABS resin in view of cost and the like. . Note that the terminal-side placement member 50 does not have to be formed of an insulating material as long as it is possible to ensure the insulating properties of the power storage element 40, the bus bar 60, and the like. Details of the configuration of the terminal side arrangement member 50 will be described later.

  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, bus bar 60 connects the positive electrode terminal or the negative electrode terminal of one power storage element 40 and the negative electrode terminal or the positive electrode terminal of another power storage element 40 in adjacent power storage elements 40. In the present embodiment, bus bar 60 connects thirteen power storage elements 40 in series.

  The wiring board 70 is arranged 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 has 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 the present embodiment, all the power storage elements 40. Has a wire whose one end is connected to the positive electrode terminal of. The wiring board 70 has a rectangular shape and is arranged between the positive electrode terminal and the negative electrode terminal of the electricity storage device 40. In the present embodiment, two wiring boards 70 are arranged, but the number of wiring boards 70 is not limited. Although a harness or the like can be used instead of the wiring board 70, by connecting the electrode terminals and the measurement board 81 using the wiring board 70, the wiring can be easily routed and the assemblability is improved. . Wiring board 70 may have a structure in which a thermistor is mounted and the temperature of power storage element 40 can be detected.

  The measurement board 81 and the main circuit board 82 are arranged between the power storage element 40 and the side wall of the exterior body 10, and are 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 a main circuit component through which a large current flows is mounted, and is fixed to the inner surface of the side wall of the exterior body 10 facing the short side surface of the container of the electricity storage device 40. Further, the measurement board 81 is a board on which peripheral circuit parts 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 electricity storage device 40.

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

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

  As shown in the figure, the electricity storage device 40 includes a container 420, a positive electrode terminal 430, and a negative electrode terminal 440, and the container 420 includes a container lid portion 421. Further, an electrode body (power generation element), a current collector (positive electrode current collector and negative electrode current collector), and the like are arranged inside the container 420, and a liquid such as an electrolytic solution (non-aqueous electrolyte) is sealed. However, detailed description is omitted.

  The container 420 is composed of a housing body having a rectangular tubular shape made of metal and having a bottom, and a metal container lid portion 421 that closes an opening of the housing body. Further, the container 420 can be hermetically sealed by, for example, welding the container lid 421 and the housing body after housing the electrode body and the like inside. As described above, the container 420 is a rectangular parallelepiped-shaped container having long side surfaces on both side surfaces in the Y-axis direction and short side surfaces on both side surfaces in the X-axis direction in FIG. The material of the container 420 is not particularly limited, but a weldable metal such as stainless steel or aluminum is preferable.

  The positive electrode terminal 430 is an electrode terminal electrically connected to the positive electrode of the electrode body via the positive electrode current collector, and the negative electrode terminal 440 is electrically connected to the negative electrode of the electrode body via the negative electrode current collector. These are connected electrode terminals and are both attached to the container lid 421. That is, the positive electrode terminal 430 and the negative electrode terminal 440 lead the electricity stored in the electrode body to the external space of the power storage element 40, and also introduce the electricity into the internal space of the power storage element 40 to store the electricity in the electrode body. It is a metal electrode terminal for doing.

  Next, the configuration of the terminal side placement member 50 will be described in detail.

  FIG. 4 is a perspective view showing the configuration of the terminal side placement member 50 according to the embodiment of the present invention. Further, FIG. 5 is a perspective view showing a positional relationship between the terminal side arrangement member 50, the power storage element 40, and the bus bar 60 according to the embodiment of the present invention.

  As shown in these drawings, the terminal side arrangement member 50 is a member arranged on the electrode terminal side of the plurality of power storage elements 40 (in the present embodiment, thirteen power storage elements 401 to 413), and is arranged above. A plurality of bus bars 60 (12 bus bars 60 in the present embodiment) and conductive members 61 to 63 are arranged. Specifically, the terminal-side placement member 50 has a conductive member placement portion 510, a conductive member placement portion 520, twelve conductive member placement portions 530, and a conductive member placement portion 540.

  First, the conductive member placement portion 530 will be described.

  The conductive member placement portion 530 is a portion where the bus bar 60 that connects the electrode terminals of the two power storage elements 40 is placed. That is, each of the 12 bus bar 60 is arranged in each of the 12 conductive member arrangement portions 530. The bus bar 60 is a conductive member that connects the positive electrode terminal 430 and the negative electrode terminal 440 of the adjacent power storage elements 40 among the plurality of power storage elements 40. Here, the conductive member placement portion 530 includes a mounting portion 531, a wall portion 532, and a protrusion portion 533, and the wall portion 532 forms a conductive member housing portion 534 that is an opening.

  The mounting portion 531 is a flat plate-shaped portion on which the bus bar 60 is mounted. The protruding portion 533 is a portion that protrudes inward from the inner surface of the wall portion 532 into the conductive member housing portion 534, and is disposed above the bus bar 60. That is, the projecting portion 533 sandwiches the bus bar 60 with the mounting portion 531 and fixes the bus bar 60 in the conductive member accommodating portion 534.

  The wall portion 532 is an annular wall that surrounds the outer periphery of the bus bar 60 when the bus bar 60 is placed on the placing portion 531 and is arranged upright (in the Z-axis direction). Here, the wall portion 532 is formed along the outer peripheral shape of the bus bar 60, prevents the bus bar 60 from coming into contact with another conductive member, and plays a role of a guide for disposing the bus bar 60. .

  Further, the wall portion 532 has a rectangular shape or a hexagonal shape in which two corner portions of the rectangular shape are cut off as viewed from above (Z-axis direction), and the bus bar 60 has an outer peripheral shape of the rectangular shape or It has the same shape as the hexagonal shape. When the wall portion 532 and the bus bar 60 have a shape that is not rotationally symmetrical, such as a hexagonal shape, the wall portion 532 is formed along the outer periphery of the bus bar 60, and therefore the bus bar 60 is arranged in the wrong direction. Can be prevented.

  The conductive member accommodation portion 534 is a space (opening portion) surrounded by the wall portion 532, and accommodates the bus bar 60. In other words, the wall portion 532 is formed on the outer periphery of the conductive member accommodating portion 534. That is, the conductive member accommodating portion 534 has the same shape as the outer peripheral shape of the bus bar 60 when viewed from above (Z-axis direction).

  The positive electrode terminal 430 and the negative electrode terminal 440 of the adjacent power storage elements 40 are inserted into the conductive member housing portion 534, and the bus bar 60 is connected. That is, the bolt portion of the positive electrode terminal 430 is inserted into the conductive member accommodating portion 534, and one end portion of the bus bar 60 is connected to the positive electrode terminal 430 by the nut. Further, the bolt portion of the negative electrode terminal 440 is inserted into the conductive member housing portion 534, and the other end portion of the bus bar 60 is connected to the negative electrode terminal 440 by the nut.

  Next, the conductive member placement portion 520 will be described.

  The conductive member placement portion 520 is a portion where the conductive member 61 connected to the electrode terminal of the storage element 40 or a bus bar 60a described later (see FIGS. 8 and 9) is placed. In the present embodiment, the conductive member 61 is arranged in the conductive member arrangement portion 520.

  The conductive member 61 is provided on the positive electrode terminal 430 of the power storage element 401, which is disposed at the end on the X axis direction positive side and the Y axis direction negative side of the plurality of power storage elements 40, and the front wall portion 200 of the exterior body 10. It is a conductive member connected to the positive electrode side terminal of the external connection terminal 210. That is, the conductive member 61 is a member that connects the electrode terminal of the storage element 40 and the external connection terminal 210. Although the conductive member 61 is a conductive wire (metal wiring) in the present embodiment, it may have any shape such as a metal rod-shaped member or a plate-shaped member.

  Here, the conductive member placement portion 520 has a mounting portion 521, a wall portion 522, and a protrusion portion 523, and the wall portion 522 forms a conductive member housing portion 524. A first lead-out portion 525 is formed on the wall portion 522.

  That is, the conductive member placement portion 520 is different from the conductive member placement portion 530 in that the first lead-out portion 525 is formed on the wall portion 522, but the placement portion 521 and the wall portion of the conductive member placement portion 520 are different. The configurations of 522, the protrusion 523, and the conductive member accommodating portion 524 are the same as the configurations of the mounting portion 531, the wall portion 532, the protrusion 533, and the conductive member accommodating portion 534 of the conductive member arrangement portion 530. Therefore, in the following, the details of the configurations of the mounting portion 521, the wall portion 522, the protrusion portion 523, and the conductive member accommodating portion 524 will be briefly described.

  The mounting portion 521 is a flat plate-shaped portion on which the bus bar 60a can be mounted. Further, the protrusion 523 is a portion that protrudes inward from the inner surface of the wall portion 522 toward the inside of the conductive member accommodating portion 524, and when the bus bar 60a is mounted on the mounting portion 521, can be arranged above the bus bar 60a. Has been formed. In other words, the projecting portion 523 can fix the bus bar 60a in the conductive member accommodating portion 524 by sandwiching the bus bar 60a with the mounting portion 521. In addition, in the present embodiment, the bus bar 60a is not arranged.

  The wall portion 522 is an annular wall that surrounds the outer periphery of the bus bar 60a when the bus bar 60a is placed on the placing portion 521, and is arranged upright (Z-axis direction). The conductive member accommodation portion 524 is a space (opening portion) surrounded by the wall portion 522 capable of accommodating the bus bar 60a. That is, the wall portion 522 is formed on the outer periphery of the conductive member housing portion 524, and the bus bar 60 a can be arranged in the conductive member housing portion 524.

  As described above, the bus bar 60a is not arranged in the present embodiment, but when the bus bar 60a is arranged in the conductive member accommodating portion 524, the bus bar 60a is connected to the positive electrode terminal 430 of the power storage element 401. , And a negative electrode terminal 440 (see FIGS. 8 and 9) of a power storage element 414 described later.

  The first lead-out portion 525 is a rectangular opening formed so that the conductive member 61 can be led out from the conductive member accommodating portion 524. Specifically, the first lead-out portion 525 is formed by notching the wall portion 522 on the minus side in the Y-axis direction in a rectangular shape, and the conductive member 61 can be arranged in the first lead-out portion 525. ing.

  Further, the conductive member accommodating portion 524 and the first lead-out portion 525 are openings that penetrate different portions of the terminal side placement member 50 in different directions. That is, the conductive member accommodating portion 524 is an opening for arranging the bus bar that can accommodate the bus bar 60a that connects the positive electrode terminal 430 of the power storage element 401 and the negative electrode terminal 440 of the power storage element 414, and the conductive member arranging portion 520 is connected to Z. It is formed so as to penetrate in the axial direction. Further, the first lead-out portion 525 is an opening for terminal connection that allows the conductive member 61 to be led out from the positive electrode terminal 430 of the power storage element 401 toward the positive electrode side terminal of the external connection terminal 210, and is provided in the conductive member arrangement portion 520. The wall portion 522 is formed so as to penetrate in the Y-axis direction. Thereby, the opening for arranging the bus bar and the opening for connecting the terminal are openings that penetrate different parts of the terminal side arranging member 50 in different directions.

  The first lead-out portion 525 may be formed by penetrating the wall portion 522 on the Y axis direction plus side in the Y axis direction, or the wall portion 522 on the X axis direction plus side or the minus side in the X axis direction. It does not matter even if it is formed so as to penetrate through. Further, the first lead-out portion 525 is not limited to a rectangular cutout, and may be a cutout having any shape such as a semicircular shape, or a rectangular or circular penetrating shape instead of a cutout. It may be a hole.

  Next, the conductive member placement portion 510 will be described.

  The conductive member placement portion 510 is a portion in which a conductive member 64 (see FIGS. 8 and 9), which will be described later, that is connected to the electrode terminal of the storage element 40 can be placed. Here, in the case where the conductive member 64 is arranged in the conductive member arrangement portion 510, the conductive member 64 has an end portion (an end portion on the X axis direction plus side and the Y axis direction minus side) of the plurality of power storage elements 40. ) Is connected to the positive electrode terminal 430 of the storage element 414 (see FIGS. 8 and 9). In the present embodiment, conductive member 64 is not arranged in conductive member arrangement portion 510, but in the following description, conductive member 64 is arranged in conductive member arrangement portion 510.

  The conductive member 64 is provided on the positive electrode terminal 430 of the power storage element 414 arranged at the end on the X axis direction positive side and the Y axis direction negative side of the plurality of power storage elements 40, and on the front wall portion 200 of the exterior body 10. It is a conductive member connected to the positive electrode side terminal of the external connection terminal 210. That is, the conductive member 64 is a member that connects the electrode terminal of the storage element 40 and the external connection terminal 210. Although the conductive member 64 is a conductive wire (metal wiring) in the present embodiment, it may have any shape such as a metal rod-shaped member or a plate-shaped member.

  As described above, the external connection terminal 210 is configured to be connectable to the positive electrode terminal 430 of the power storage element 401 and the positive electrode terminal 430 of the power storage element 414. That is, the external connection terminal 210 is configured to be connectable to the positive electrode terminal 430 of the power storage element 401 via the conductive member 61, and is configured to be connectable to the positive electrode terminal 430 of the power storage element 414 via the conductive member 64. There is.

  Here, the conductive member arranging portion 510 has a wall portion 511, and the wall portion 511 forms a conductive member accommodating portion 512. Further, the wall portion 511 is formed with a second lead portion 513.

  The wall portion 511 is an annular wall that surrounds the outer periphery of the conductive member 64 when the conductive member 64 is arranged, and is arranged upright (in the Z-axis direction). The wall portion 511 has a role of preventing the conductive member 64 from coming into contact with another conductive member.

  The conductive member accommodation portion 512 is a space (opening) surrounded by the wall portion 511, and accommodates the conductive member 64. In other words, the wall portion 511 is formed on the outer periphery of the conductive member accommodation portion 512. The positive electrode terminal 430 of the electricity storage device 40 is inserted into the conductive member accommodation portion 512, and the conductive member 61 is connected thereto. That is, the bolt portion of the positive electrode terminal 430 is inserted into the conductive member housing portion 512, and one end portion of the conductive member 61 is connected to the positive electrode terminal 430 by the nut.

  The second lead-out portion 513 is a rectangular opening formed so that the conductive member 64 can be led out from the conductive-member accommodating portion 512. Specifically, the second lead-out portion 513 is formed by notching the wall portion 511 on the minus side in the Y-axis direction in a rectangular shape, and the conductive member 64 can be arranged in the second lead-out portion 513. ing.

  In addition, the conductive member accommodating portion 512 and the second lead-out portion 513 are openings that penetrate different portions of the terminal side placement member 50 in different directions. That is, the conductive member accommodation portion 512 is an opening formed by penetrating the conductive member arrangement portion 510 in the Z-axis direction, and the second lead-out portion 513 defines the wall portion 511 of the conductive member arrangement portion 510 in the Y-axis direction. Is an opening formed through the.

  The second lead-out portion 513 may be formed by penetrating the wall portion 511 on the Y axis direction plus side in the Y axis direction, or the wall portion 511 on the X axis direction plus side or the minus side in the X axis direction. It does not matter even if it is formed so as to penetrate through. The second lead-out portion 513 is not limited to a rectangular cutout, and may be a cutout of any shape such as a semicircular shape, or a rectangular or circular cutout instead of a cutout. It may be a hole.

  Next, the conductive member placement portion 540 will be described. Note that the configuration of the conductive member placement portion 540 is substantially the same as the configuration of the conductive member placement portion 510 described above, so a simple description will be given below.

  The conductive member placement portion 540 is a portion where the conductive member 62 connected to the electrode terminal of the storage element 40 is placed. Here, the conductive member 62 is electrically connected to the negative electrode terminal 440 of the power storage element 413 arranged at the ends (the negative side in the X-axis direction and the negative side in the Y-axis direction) of the plurality of power storage elements 40. It is a member of sex. Although the conductive member 62 is a conductive wire (metal wiring) in the present embodiment, it may have any shape such as a metal rod-shaped member or a plate-shaped member.

  Specifically, the conductive member placement portion 540 corresponds to the rectangular opening in which the one end of the conductive member 62 is placed (that is, the conductive member accommodation portion 512 and the second lead portion 513 of the conductive member placement portion 510). (Opening). Then, the bolt portion of the negative electrode terminal 440 of the storage element 413 is inserted into the opening, and the one end portion of the conductive member 62 is connected to the negative electrode terminal 440 by the nut. In addition, a wall (that is, a wall corresponding to the wall portion 511 of the conductive member placement portion 510) standing upright (in the Z-axis direction) is formed around the opening, and the conductive member 62 serves as another conductive member. Prevents contact. Further, the other end of the conductive member 62 is connected to the negative electrode side terminal of the external connection terminal 210 provided on the front wall portion 200 of the exterior body 10 via the main circuit board 82 and the conductive member 63.

  Next, a configuration in which the plurality of power storage elements 40 (power storage elements 401 to 413) are connected by the bus bar 60 and the conductive members 61 to 63 will be specifically described.

  FIG. 6 is a perspective view showing a configuration in which a plurality of power storage elements 40 according to the embodiment of the present invention are connected by a bus bar 60 and conductive members 61 to 63. Specifically, this figure is a perspective view showing a configuration when the upper wall portion 300 and the wiring board 70 are removed from the power storage device 1 shown in FIG. 1.

  Further, FIG. 7 is a plan view showing a configuration in which a plurality of power storage elements 40 according to the embodiment of the present invention are connected by bus bar 60 and conductive members 61 to 63. That is, this figure is a top view of the configuration shown in FIG. 6 as viewed from the Z axis direction plus side.

  As shown in these figures, the conductive member 61 arranged in the conductive member arrangement portion 520 connects the positive electrode side terminal of the external connection terminal 210 provided on the front wall portion 200 and the positive electrode terminal 430 of the power storage element 401. To be done. Specifically, the conductive member 61 is arranged so as to straddle a power storage element housing portion 110 in which a power storage element 414 described later is stored. Then, the conductive member 61 connects the power storage element 401 to the external connection terminal 210 that is arranged adjacent to the power storage element housing part 110 and sandwiching the power storage element housing part 110.

  Here, the power storage element housing portion 110 is a housing portion for the power storage element 40 arranged at a position adjacent to the power storage element 401 and closest to the external connection terminal 210. That is, the storage element housing portion 110 is a space at the end portion on the plus side in the X-axis direction and the minus side in the Y-axis direction of the space in which the storage element 40 is stored.

  Further, the negative electrode terminal 440 of the electric storage element 401 and the positive electrode terminal 430 of the electric storage element 402 are connected by the bus bar 60 arranged in the conductive member arrangement portion 530, and in the same manner, the positive electrode terminal 430 of the electric storage element 413 is connected. . Further, the negative electrode terminal 440 of the storage element 413 and the main circuit board 82 are connected by the conductive member 62 arranged in the conductive member arrangement portion 540.

  Further, the conductive member 63 connects the main circuit board 82 and the negative terminal of the external connection terminal 210 provided on the front wall portion 200. Although the conductive member 63 is a conductive wire (metal wiring) in the present embodiment, it may have any shape such as a metal rod-shaped member or a plate-shaped member.

  As described above, the power storage device 1 including the thirteen power storage elements 40 can be configured. That is, the positive electrode terminal 430 of the power storage element 401 and the positive electrode side terminal of the external connection terminal 210 are connected to each other without being connected to the negative electrode terminal 440 and the positive electrode terminal 430 of the power storage element 414 described later. Here, the power storage device 1 can be changed from a configuration including 13 power storage elements 40 to a configuration including 14 power storage elements 40. Therefore, the configuration in which the power storage device 1 includes 14 power storage elements 40 will be described below.

  FIG. 8 is a perspective view showing a configuration in the case where power storage device 1 according to the embodiment of the present invention includes 14 power storage elements 40. Specifically, this figure is a diagram corresponding to FIG. Further, FIG. 9 is a plan view showing a configuration in the case where power storage device 1 according to the embodiment of the present invention includes 14 power storage elements 40. Specifically, this figure is a diagram corresponding to FIG. 7.

  As shown in these drawings, the power storage device 1 includes a conductive member 64 and a bus bar 60a instead of the conductive member 61. In addition, the power storage device 1 is provided with 14 power storage elements 40 (power storage elements 401 to 414) in addition to the power storage element 414.

  The power storage element 414 is a power storage element arranged at a position adjacent to the power storage element 401 and closest to the external connection terminal 210 (end on the X axis direction positive side and the Y axis direction negative side). That is, the power storage element 414 is arranged in the power storage device 1 by being housed in the power storage element housing section 110.

  The power storage element 414 has a positive electrode terminal 430 connectable to the positive electrode side terminal of the external connection terminal 210 and a negative electrode terminal 440 connectable to the positive electrode terminal 430 of the power storage element 401. That is, the power storage element 414 is connected to the positive electrode side terminal of the external connection terminal 210 and the positive electrode terminal 430 of the power storage element 401 while being housed in the power storage element housing portion 110.

  Here, the conductive member 64 connects the positive electrode side terminal of the external connection terminal 210 and the positive electrode terminal 430 of the storage element 414. Specifically, the bolt portion of the positive electrode terminal 430 of the storage element 414 is inserted into the conductive member housing portion 512 of the conductive member arrangement portion 510, and one end portion of the conductive member 64 is connected to the positive electrode terminal 430 by a nut. . The conductive member 64 is led out from the second lead portion 513, and the other end thereof is connected to the positive electrode side terminal of the external connection terminal 210.

  Further, bus bar 60a connects negative electrode terminal 440 of power storage element 414 and positive electrode terminal 430 of power storage element 401. That is, the bus bar 60a is arranged in the conductive member arrangement portion 520. Specifically, the bus bar 60a is housed in the conductive member housing portion 524 of the conductive member placement portion 520. Then, the bolt portion of the negative electrode terminal 440 of the power storage element 414 is inserted into the conductive member accommodation portion 524, and one end portion of the bus bar 60a is connected to the negative electrode terminal 440 with a nut. Further, the bolt portion of the positive electrode terminal 430 of the power storage element 401 is inserted into the conductive member housing portion 524, and the other end portion of the bus bar 60a is connected to the positive electrode terminal 430 with a nut. Since the bus bar 60a has the same configuration as the bus bar 60, detailed description thereof will be omitted.

  In this way, the conductive member 64 connects the positive electrode side terminal of the external connection terminal 210 and the positive electrode terminal 430 of the storage element 414. Further, the bus bar 60a connects the negative electrode terminal 440 of the power storage element 414 and the positive electrode terminal 430 of the power storage element 401.

  According to the above configuration, the electricity storage device 1 includes the electricity storage element 414 (second terminal) having the negative electrode terminal 440 (second terminal) connectable to the positive electrode terminal 430 (first terminal of the first electricity storage element) of the electricity storage element 401. A power storage element housing portion 110 for housing a power storage element) is provided. Further, the external connection terminal 210 has a polarity (reverse polarity) different from that of the positive electrode terminal 430 of the power storage element 401 (first terminal of the first power storage element) and the positive electrode terminal 430 of the power storage element 414 (the second terminal of the second power storage element). It is configured to be connectable to the third terminal) of the polarity).

  Further, the positive electrode terminal 430 of the power storage element 401 (first terminal of the first power storage element) and the negative electrode terminal 440 of the power storage element 414 (second terminal of the second power storage element different from the first power storage element) are connected. A conductive member accommodating portion 524 capable of accommodating the bus bar 60a (first conductive member) is provided. In addition, the conductive member 61 (second conductive member) that connects the positive electrode terminal 430 (first terminal) of the power storage element 401 and the positive electrode side terminal of the external connection terminal 210 can be led out from the conductive member housing portion 524. A lead-out section 525 is provided.

  When the power storage device 1 includes thirteen power storage elements 40, the conductive member 61 (second conductive member) is connected to the positive electrode terminal 430 (first terminal of the first power storage element) of the power storage element 401 and the external connection terminal. 210 is connected to the positive electrode side terminal. That is, the positive electrode terminal 430 of the power storage element 401 (first terminal of the first power storage element) and the positive electrode side terminal of the external connection terminal 210 are the negative electrode terminal 440 and the positive electrode terminal 430 of the power storage element 414 (second terminal of the second power storage element). And the third terminal) and are connected to each other.

  In the case where power storage device 1 includes 14 power storage elements 40, conductive member 64 (third conductive member) is the positive electrode side terminal of external connection terminal 210 and positive electrode terminal 430 of power storage element 414 (second power storage element). 3rd terminal) of. Further, the bus bar 60a (first conductive member) connects the positive electrode terminal 430 of the power storage element 401 (first terminal of the first power storage element) and the negative electrode terminal 440 of the power storage element 414 (second terminal of the second power storage element). To do.

  As described above, according to the power storage device 1 according to the embodiment of the present invention, the power storage element housing portion 110 that houses the second power storage element having the second terminal connectable to the first terminal of the first power storage element. And an external connection terminal 210 connectable to the first terminal and the third terminal of the second power storage element. That is, when the second power storage element is stored in the power storage element housing portion 110, the first terminal of the first power storage element and the second terminal of the second power storage element are connected and the second power storage element is connected to the first terminal of the second power storage element. The three terminals and the external connection terminal 210 are connected. When the second storage element is not stored in the storage element housing portion 110, the first terminal of the first storage element and the external connection terminal 210 are connected. Accordingly, the second power storage element can be easily attached and detached, and thus the power storage device 1 can easily change the number of the power storage elements 40. Further, even if the number of power storage elements 40 is changed, the terminal side arrangement member 50, the exterior body 10 and the like can be shared, so that the power storage device 1 having a different number of power storage elements 40 is configured at low cost. can do.

  In addition, in the power storage device 1, when changing from a configuration including 14 power storage elements 40 to a configuration including 13 power storage elements 40, the power storage element 414 connected to the external connection terminal 210 must be removed. Become. Here, when the power storage element 40 to be removed is a power storage element between two power storage elements 40 such as the power storage elements 401 to 412, the distance between the electrode terminals of the power storage element 40 after removal is generally considered from the viewpoint of cost and the like. Are connected by wires rather than busbars. In this case, when the voltage between the electrode terminals of the storage element 40 is measured, the wiring has a resistance higher than that of the bus bar. Therefore, connecting the electrode terminals with a wire is more effective than connecting the wires with a bus bar. The drop becomes large and an error occurs in the voltage measurement. From this, according to the configuration of the power storage device 1, even if the number of the power storage elements 40 is changed, the connection between the two power storage elements 40 can be left as the bus bar, so that the accuracy of voltage measurement is reduced. Can be suppressed.

  Further, in the power storage device 1, the terminal side arrangement member 50 includes a conductive member housing portion 524 capable of housing a first conductive member that connects the first terminal of the first power storage element and the second terminal of the second power storage element, It has the 1st derivation | leading-out part 525 which can lead out the 2nd electroconductive member which connects a 1st terminal and the external connection terminal 210 from the electroconductive member accommodating part 524. That is, if the first conductive member is arranged in the conductive member housing 524, the second power storage element can be connected to the first power storage element, and if the second conductive member is arranged in the first lead-out portion 525, The external connection terminal 210 can be connected to the power storage element. Therefore, from the state in which the second power storage element is connected to the first power storage element and the external connection terminal 210 is connected to the second power storage element, the second power storage element is removed and the external connection terminal 210 is connected to the first power storage element. As a result, the number of power storage elements 40 can be reduced. As described above, according to the power storage device 1, since the storage elements 40 can be easily attached and detached, the number of the storage elements 40 can be easily changed.

  Further, the conductive member accommodating portion 524 formed in the terminal side arrangement member 50 is an opening portion for arranging the bus bar, the first lead-out portion 525 is an opening portion for connecting the terminal, and these two opening portions are on the terminal side. It penetrates different parts of the arrangement member 50 in different directions. That is, by opening the conductive member housing 524 toward the second power storage element, the first power storage element and the second power storage element can be easily connected via the conductive member housing 524. In addition, by opening the first lead-out portion 525 toward the external connection terminal 210, the first storage element and the external connection terminal 210 can be easily connected via the first lead-out portion 525.

  Further, in the terminal side arrangement member 50, since the wall portion 522 is formed on the outer periphery of the conductive member accommodation portion 524 and the first lead-out portion 525 is formed on the wall portion 522, the wall is formed on the outer periphery of the conductive member accommodation portion 524. Even when the portion 522 is formed, the first lead-out portion 525 can be easily formed.

  Further, the terminal-side arrangement member 50 further includes a second lead-out portion 513 that can lead out a third conductive member that connects the external connection terminal 210 and the third terminal of the second power storage element. This allows the second power storage element to be easily connected to the external connection terminal 210 when mounting the second power storage element.

  Further, since the storage element housing part 110 is arranged at a position adjacent to the first storage element and closest to the external connection terminal 210, when storing the second storage element in the storage element housing part 110, The two storage elements can be easily connected to the first storage element and the external connection terminal 210.

  Further, the first terminal and the external connection terminal 210 of the first power storage element are connected to each other without being connected to the second terminal and the third terminal of the second power storage element. That is, even when the power storage device 1 is provided with the power storage element housing portion 110 in which the second power storage element is stored, the second power storage element is not housed and the first power storage element and the external connection terminal 210 are separated from each other. It has a connected configuration. As described above, according to the power storage device 1, the number of the power storage elements 40 can be reduced from the number that can be accommodated.

  Although the power storage device 1 according to the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. That is, it should be considered that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown not by the above description but by the scope of claims for patent, and it is intended that all modifications within the scope and meaning equivalent to the scope of claims for patent are included. Further, a form constructed by arbitrarily combining the constituent elements included in the above-described embodiment is also included within the scope of the present invention.

  For example, in the above-described embodiment, the first lead-out portion 525 is formed in the conductive member arrangement portion 520, and the second lead-out portion 513 is formed in the conductive member arrangement portion 510. However, as long as the conductive member 61 or 64 can be led out, one or both of the first lead-out portion 525 and the second lead-out portion 513 may not be formed.

  In addition, in the above-described embodiment, the conductive member accommodating portion 524 and the first lead-out portion 525, and the conductive member accommodating portion 512 and the second lead-out portion 513 are openings that penetrate different portions of the terminal side placement member 50 in different directions. It was decided to be a division. However, the conductive member housing portion 524 and the first lead-out portion 525, or the conductive member housing portion 512 and the second lead-out portion 513 may be openings that penetrate different portions of the terminal side placement member 50 in the same direction. .

  Further, in the above-described embodiment, the first lead-out portion 525 is formed on the wall portion 522 of the conductive member arrangement portion 520, and the second lead-out portion 513 is formed on the wall portion 511 of the conductive member arrangement portion 510. . However, the first lead-out portion 525 may be formed at a location other than the wall portion 522, and the second lead-out portion 513 may be formed at a location other than the wall portion 511.

  In addition, in the above-described embodiment, power storage device 1 is configured such that power storage element 414 can be attached and detached. However, the power storage element that can be attached and detached is not limited to the power storage element 414 and may be the power storage element 413. That is, the power storage element housing portion in which the attachable / detachable power storage element is housed is not limited to the housing portion arranged closest to the external connection terminal 210. In this case, a lead-out portion for leading out the conductive member is formed in the conductive member arrangement portion corresponding to the storage element 413.

  Further, in the above-described embodiment, the number of the power storage elements 40 included in the power storage device 1 can be reduced from 14 to 13 and changed to 13. However, the number of the power storage elements 40 that can be changed by the power storage device 1 is not particularly limited, and can be changed from 14 to 12, for example, or can be changed to another number. It doesn't matter. For example, in the case of reducing two, the power storage elements 40 to be reduced may be the power storage elements 414 and 401 or the power storage elements 414 and 413. In this case, it can be realized by forming a lead-out portion for leading out the conductive member in the corresponding conductive member arrangement portion.

  Further, in the above-described embodiment, power storage device 1 is configured to be able to accommodate 14 power storage elements 40, but the number of power storage elements 40 that can be stored is not limited to 14, It does not matter even if it is the number. Further, in the above-described embodiment, the power storage elements 40 are arranged in two rows (two rows of the power storage elements 401 to 406 (and 414) and the power storage elements 407 to 413), but this is also 1 It does not matter if they are arranged in rows or three or more rows.

  Further, in the above-described embodiment, the electric storage device 40 (the electric storage devices 401 to 413 (and 414)) is configured such that the longitudinal direction of the container lid portion 421 is oriented in the X-axis direction in FIG. 7 (or FIG. 9) ( The container 420 is arranged such that the long side surface thereof is parallel to the XZ plane. However, the storage element 40 may be arranged such that the longitudinal direction of the container lid 421 is oriented in the Y-axis direction (the long side surface of the container 420 is parallel to the YZ plane). Even in this case, of the space in which the power storage element 40 is stored, the space at the end on the positive side in the X-axis direction and the negative side in the Y-axis direction is used as the power storage element storage portion 110, and the same configuration as in the above-described embodiment is applied. be able to. That is, in this case, similarly to the above-described embodiment, the power storage element housed in the power storage element housing unit 110 is the power storage element 414, and the power storage element 401 is arranged adjacent to the power storage element 414. 210 can be configured to be connectable to the power storage element 414 and the power storage element 401. In this case, the storage element housing unit 110 serves as a storage unit for the storage element arranged at a position adjacent to the storage element 401 and closest to the external connection terminal 210. In this case, the number of storage elements 40, the arrangement position, the connection form (serial connection or parallel connection), etc. are not particularly limited. In addition, the electricity storage device 40 may be arranged such that the longitudinal direction of the container lid 421 is oriented in a direction different from the X-axis direction and the Y-axis direction (direction inclined from the X-axis direction and the Y-axis direction). Good. Further, power storage element housing portion 110 does not need to be arranged closest to external connection terminal 210.

  Further, the present invention can be realized not only as such a power storage device 1 but also as a terminal side arrangement member 50 provided on the power storage device 1 and arranged on the electrode terminal side of the power storage element 40. .

  INDUSTRIAL APPLICABILITY The present invention can be applied to a power storage device or the like that can easily change the number of power storage elements.

DESCRIPTION OF SYMBOLS 1 Electric storage device 10 Exterior body 20 Bottom surface side arrangement member 40, 401-414 Electric storage element 50 Terminal side arrangement member 60, 60a Bus bar 61-64 Conductive member 70 Wiring board 81 Measurement board 82 Main circuit board 100 Exterior body body 110 Electric storage element housing Part 200 Front wall part 210 External connection terminal 300 Upper wall part 420 Container 421 Container lid part 430 Positive electrode terminal 440 Negative electrode terminal 510-540 Conductive member arrangement part 511, 522, 532 Wall part 512, 524, 534 Conductive member accommodating part 513th Second derivation part 521, 531 Mounting part 523, 533 Projection part 525 First derivation part

Claims (8)

A power storage device comprising a first power storage element having a first terminal that is a positive electrode terminal or a negative electrode terminal and an external connection terminal,
A terminal side arrangement member arranged on the first terminal side of the first storage element,
The terminal side arrangement member,
A conductive member capable of accommodating a first conductive member connecting the first terminal and a second power storage element different from the first power storage element and having a polarity different from that of the first terminal. A containment unit,
A power storage device comprising: a first lead-out portion that can lead out a second conductive member that connects the first terminal and the external connection terminal from the conductive member accommodating portion.   The first conductive member connects the first terminal and the second terminal without connecting the first terminal and the external connection terminal,
  The second conductive member connects the first terminal and the external connection terminal without connecting the first terminal and the second terminal.
  The power storage device according to claim 1. The conductive member accommodating portion is an opening for bus bar arrangement capable of accommodating a bus bar connecting the first terminal and the second terminal as the first conductive member,
The first lead-out portion is an opening for terminal connection that can lead out the second conductive member from the first terminal to the external connection terminal,
Wherein A and opening of the busbar arrangement the openings for the terminal connections, the power storage device according to different portions of the terminal side arranged member to claim 1 or 2 as an opening portion penetrating in different directions. The terminal side arrangement member further has a wall formed on the outer periphery of the conductive member accommodating portion,
The power storage device according to claim 1, wherein the first lead-out portion is formed on the wall. The terminal side arrangement member, further,
Claim 1-4 having the external connection terminal, said second terminal second derivation unit can be derived a third conductive member for connecting the third terminal is a different person terminal and the second storage element The power storage device according to any one of 1. The power storage device according to claim 5 , wherein the first terminal and the external connection terminal are connected to each other without being connected to the second terminal and the third terminal. Furthermore, a storage element accommodating portion for accommodating the second storage element is provided,
The electric storage element housing portion is located adjacent to the first storage element, and, according to any one of claims 1 to 6, which is a housing portion of the storage element which is disposed closest to the external connection terminal Power storage device. A terminal side arrangement member arranged on the side of the first terminal of the first storage element having a first terminal that is a terminal of the positive electrode or the negative electrode,
A conductive member capable of accommodating a first conductive member connecting the first terminal and a second power storage element different from the first power storage element and having a polarity different from that of the first terminal. A containment unit,
A terminal-side disposing member, comprising: a first lead-out portion that can lead out a second conductive member that connects the first terminal and the external connection terminal from the conductive member housing portion.

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