JP6686333B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage device including a power storage element.

  BACKGROUND ART In a power storage device including a power storage element, a configuration in which a plurality of power storage elements are held by a holding member has been conventionally known (for example, see Patent Document 1).

JP, 2011-34730, A

  By the way, in a conventional power storage device, a member such as a partition plate (hereinafter, referred to as “arranged object”) may be provided on the side of the power storage element. In this case, after the storage element and the holding member have been assembled, the placed object is blocked by the holding member or the electricity storage element, making it difficult to visually recognize, and it becomes difficult to confirm the presence or absence of the placed object and the placement state such as the placement position. There is a risk. For this reason, when it is desired to confirm the arrangement state of the arrangement object, it is necessary to disassemble the once-assembled power storage element and the holding member to confirm the arrangement state of the arrangement object. May occur.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a power storage device capable of improving workability during assembly.

  In order to achieve the above object, a power storage device according to one embodiment of the present invention includes a power storage element and a holding member that holds the power storage element, and the holding member is provided on a side of the power storage element. An opening is provided at a position facing the placed object.

  According to this, since the holding member has the opening at a position facing the object provided on the side of the power storage element, the presence or absence of the object and the position of the object are determined from the opening when assembling the power storage device. The arrangement can be easily visually confirmed. Therefore, workability at the time of assembling the power storage device can be improved.

  Further, the holding member has a first holding member arranged on the electrode terminal side of the electricity storage device, and the first holding member is located at a position facing a surface of the arranged object on the electrode terminal side. It may have an opening.

  According to this, the first holding member arranged on the electrode terminal side of the power storage element has the first opening portion at a position facing the surface on the electrode terminal side of the placed object. Even after assembling and, it is possible to easily visually confirm the presence or absence of the arrangement through the first opening. Therefore, workability at the time of assembling the power storage device can be improved.

  Further, the holding member has a second holding member arranged on the side opposite to the electrode terminal of the electricity storage device, and the second holding member is lateral to the opposite end of the arrangement. It may have a wall formed and the wall may have a second opening at a position facing the end of the arrangement.

  According to this, the second holding member arranged on the side opposite to the electrode terminal of the electricity storage element has a wall portion formed on the side of the end portion on the opposite side to the electrode terminal of the arranged object. . Then, the wall portion has the second opening portion at a position facing the end portion of the arrangement object. Therefore, even after the second holding member and the arrangement object are assembled, the arrangement position of the arrangement object can be easily visually recognized from the second opening. Therefore, workability at the time of assembling the power storage device can be improved.

  Further, the power storage device includes, as the arrangement, a partition plate provided on a side of the power storage element, the wall portion is disposed to face the first wall portion and the first wall portion, and A first wall part and a second wall part forming a groove part into which the partition plate is inserted, and at least one of the first wall part and the second wall part, the partition plate of the groove part. The second opening may be formed at a position corresponding to the bottom surface with which the tip of the above contacts.

  According to this, at least one of the first wall portion and the second wall portion forming the groove portion into which the partition plate provided on the side of the power storage element is inserted is contacted with the tip of the partition plate of the groove portion. The second opening is formed at a position corresponding to the bottom surface in contact with the second opening. Therefore, even after the second holding member and the partition plate are assembled, the insertion state of the partition plate into the groove portion can be easily visually recognized from the second opening. Therefore, workability at the time of assembling the power storage device can be improved.

  Further, a plurality of the second openings may be formed side by side in the longitudinal direction of the groove on at least one of the first wall and the second wall.

  According to this, in at least one of the first wall portion and the second wall portion, since the plurality of second opening portions are formed side by side in the longitudinal direction of the groove portion, the partition plate from the plurality of second opening portions. The state of insertion into the groove can be confirmed. This makes it possible to confirm whether or not the partition plate is inserted in the groove portion in a tilted state, so that the posture of the partition plate can be easily confirmed. Therefore, workability at the time of assembling the power storage device can be improved.

  In addition, in the first wall portion and the second wall portion, in each of the pair of wall surfaces of the first wall portion and the second wall portion facing each other, a plurality of protruding from a position different from a position facing each other. May be formed.

  According to this, at least one of the first wall portion and the second wall portion is formed with a plurality of projecting portions that project from positions different from the positions facing each other. With this, when the partition plate is inserted into the groove portion, the plurality of protrusions evenly contact the partition plate, so that the partition plate can be easily inserted into the groove portion, and the inserted partition plate can be firmly held in the groove portion. be able to.

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

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. It is a perspective view showing composition of a bottom side arrangement member concerning an embodiment of the invention. It is a top view showing composition of a bottom side arrangement member concerning an embodiment of the invention. It is a perspective view which shows the structure which the partition plate is arrange | positioned at the predetermined position of the groove part of the bottom surface side arrangement member which concerns on embodiment of this invention. It is a perspective view which shows the structure in which the partition plate is not arrange | positioned in the predetermined position of the groove part of the bottom face side arrangement member which concerns on embodiment of this invention. It is a perspective view which shows the structure which assembled the bottom side arrangement | positioning member which concerns on embodiment of this invention, the partition plate, the electrical storage element, and the terminal side arrangement | positioning member. FIG. 3 is a perspective view showing a configuration in which a bottom surface side arrangement member, a power storage element, and a terminal side arrangement member according to the embodiment of the present invention are assembled.

  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 an exterior body 10 including an exterior body 100 and a lid 110. In addition, as shown in FIG. 2, the power storage device 1 includes a bottom surface side disposing member 20, a partition plate 30, a power storage element 40, a terminal side disposing member 50, a bus bar 60, and an inner side of the exterior body 10. And a substrate 70.

  Exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of power storage device 1. The exterior body 10 arranges the power storage element 40, the substrate 70, and the like at predetermined positions, and protects the power storage element 40, the substrate 70, 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 100 and a lid 110. The exterior body 100 is a bottomed rectangular tubular housing having an opening formed therein, and includes a bottom surface side arrangement member 20, a partition plate 30, a power storage element 40, a terminal side arrangement member 50, a bus bar 60, and a substrate. And 70. The lid 110 is a flat rectangular cover member that closes the opening of the exterior body 100, and is provided with a positive electrode external terminal 111 and a negative electrode external terminal 112. Power storage device 1 charges electricity from the outside and discharges electricity to the outside through positive electrode external terminal 111 and negative electrode external terminal 112.

  The bottom surface side arranging member 20 is arranged on the side opposite to the electrode terminals of the electricity storage device 40 (that is, the bottom surface side of the electricity storage device 40, the lower side or the Z axis direction minus side, hereinafter referred to as the “bottom surface side”). The second holding member is a rectangular member and holds the partition plate 30 and the storage element 40 from below. That is, the bottom surface side arrangement member 20 is placed on the bottom wall of the exterior body 100, and holds the partition plate 30 and the power storage element 40 at a predetermined position with respect to the exterior body 10.

  Specifically, the bottom surface side arranging member 20 is made of an insulating material, and the partition plate 30 and the power storage element 40 are inserted into the grooves and the recesses formed on the upper surface, so that the partition plate 30 and the power storage element 40. Are fixed in the exterior body 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. Details of the configuration of the bottom surface side arrangement member 20 will be described later.

  The partition plate 30 is an arrangement object that is arranged on the side of any one of the power storage elements 40 included in the power storage device 1. Specifically, the partition plate 30 is a rectangular and plate-shaped member that is arranged between two adjacent power storage elements 40 and partitions the two power storage elements 40. In the present embodiment, three partition plates 30 are arranged for four power storage elements 40.

  Here, the partition plate 30 is a member having a heat insulating property (heat insulating plate), and is made of, for example, a heat insulating material made of mica. Specifically, as an example of the heat insulating material forming the partition plate 30, a damascene material formed by accumulating and combining mica pieces can be mentioned. That is, the partition plate 30 has a function of suppressing the heat generated from the power storage element 40 from being transferred to the adjacent power storage elements 40 and the like.

  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. . Power storage element 40 is arranged between two partition plates 30 or between partition plate 30 and the side wall of exterior body 10 (side wall of exterior body 100) and is housed in exterior body 10. 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 is a first holding member that holds 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. Hold in place with respect to.

  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. It should be noted that the terminal-side arrangement member 50 may have a configuration in which a concave portion into which the partition plate 30 is inserted is formed similarly to the power storage element 40, and may also hold the partition plate 30, or may not hold the partition plate 30.

  Further, the bus bar 60 and the substrate 70 are placed on the terminal side arrangement member 50. That is, the terminal side arrangement member 50 also has a function of positioning with respect to the power storage element 40 when the bus bar 60 and the substrate 70 are attached to the power storage element 40. In addition to the substrate 70, components such as a relay, a shunt resistor, a hall sensor, and a precharge resistor may be placed on the terminal side placement member 50.

  The terminal-side disposing 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, the bus bar 60 connects the positive electrode terminal or the negative electrode terminal of one power storage element 40 to the negative electrode terminal or the positive electrode terminal of the other power storage element 40 in the adjacent power storage elements 40. In the present embodiment, bus bar 60 connects four power storage elements 40 in series.

  The board 70 is arranged above the terminal side arrangement member 50. The substrate 70 is connected to the positive electrode terminal or the negative electrode terminal of the storage element 40 by a wiring (lead wire), and for example, acquires and monitors the charge state and discharge state (battery state such as voltage and temperature) of the storage element 40. ,Control.

  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 410, a positive electrode terminal 430, and a negative electrode terminal 440, and the container 410 includes a container lid portion 420. Further, an electrode body, a positive electrode current collector, a negative electrode current collector, and the like are arranged inside the container 410, but detailed description thereof will be omitted.

  The container 410 is composed of a casing main body having a rectangular tubular shape made of metal and having a bottom, and a metallic container lid portion 420 that closes an opening of the casing main body. Further, the container 410 is capable of hermetically sealing the inside by, for example, welding the container lid 420 and the housing body after accommodating the electrode body and the like inside. Thus, the container 410 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 410 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, both of which are attached to the container lid 420. 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.

  As shown in FIG. 4, the terminal side arrangement member 50 is a member arranged on the electrode terminal side of the plurality of power storage elements 40 (four power storage elements 40 in the present embodiment), and the plurality of power storage elements 40 are arranged above the plurality of power storage elements 40. Busbars 60 (three busbars 60 in the present embodiment) and substrate 70 are arranged. Specifically, the terminal side placement member 50 has a terminal exposed portion 510, a first opening 520, and a substrate mounting portion 530.

  The terminal exposed portion 510 is provided at a position facing the positive electrode terminal 430 and the negative electrode terminal 440 of the power storage element 40, and is a portion that exposes the positive electrode terminal 430 and the negative electrode terminal 440 of the power storage element 40 from the terminal side arrangement member 50. Specifically, the terminal exposed portion 510 is formed on the terminal side arrangement member 50 corresponding to the positive electrode terminal 430 and the negative electrode terminal 440 of each of the four power storage elements 40, and the terminal side arrangement member 50 is connected to the terminal side arrangement member 50. 8 rectangular openings penetrating in the thickness direction (Z-axis direction). That is, in the exposed terminal portion 510, four pairs of two openings lined up in the X-axis direction are arranged in the Y-axis direction.

  The first opening 520 is a portion formed at a position facing the surface of the partition plate 30 on the electrode terminal side (the positive electrode terminal 430 side or the negative electrode terminal 440 side, that is, the upper side or the Z axis direction plus side). Specifically, two first openings 520 are formed at positions facing the upper surface of each of the three partition plates 30 of the terminal side arrangement member 50, and the terminal side arrangement member 50 is arranged at the terminal side arrangement. These are six elongated through-holes that penetrate the member 50 in the thickness direction (Z-axis direction). That is, in the first opening 520, three sets of two openings lined up in the X-axis direction are arranged in the Y-axis direction.

  The board mounting portion 530 is a planar portion that is formed at the central position of the terminal side arrangement member 50 and on which the board 70 is mounted. That is, a space is formed between the substrate platform 530 and the lid 110, and the substrate 70 is placed in the space.

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

  FIG. 5 is a perspective view showing the configuration of the bottom surface side arrangement member 20 according to the embodiment of the present invention. FIG. 6 is a plan view showing the configuration of the bottom surface side arrangement member 20 according to the embodiment of the present invention. Note that FIG. 6A is a plan view showing the entire bottom surface side arrangement member 20. FIG. 6B is an enlarged view in which a part of the bottom surface side arrangement member 20 is enlarged.

  As shown in FIGS. 5 and 6, the bottom surface side disposing member 20 has a recess 210 into which the bottom surface side end portion of the power storage element 40 is inserted and a wall portion 220 that partitions the bottom surface side end portions of the plurality of power storage elements 40. Have and.

  The recess 210 is a long recess extending in the X-axis direction that is formed corresponding to each of the plurality of power storage devices 40, and is arranged side by side in the Y-axis direction. In the present embodiment, four recesses 210 are formed on the upper surface of bottom surface side arrangement member 20 corresponding to each of the four power storage elements 40. Then, in the plurality of recesses 210, the bottom end of the power storage element 40 is inserted into each recess 210, and the bottom surfaces of the plurality of power storage elements 40 are supported from below.

  The wall portion 220 is a wall-shaped portion formed on the side of the end portion on the bottom surface side of the electricity storage device 40. Specifically, the wall portion 220 is a portion that is disposed between the bottom surface side ends of two adjacent power storage elements 40 and partitions the bottom surface side ends of the two power storage elements 40. In the present embodiment, three wall portions 220 are formed for four power storage elements 40.

  Further, the wall portion 220 is formed with a groove portion 222 into which an end portion on the lower side of the partition plate 30 (that is, the opposite side of the electrode terminal, the bottom side, or the negative side in the Z-axis direction) is inserted. Specifically, the wall portion 220 has a first wall portion 220a and a second wall portion 220b that are arranged to face each other, and the groove portion 222 has a first wall portion 220a and a second wall portion 220b. Is formed between. Here, the first wall portion 220a is a wall formed on one side (the negative side in the Y-axis direction) in the arrangement direction of the plurality of power storage elements 40, and the second wall portion 220b is the arrangement of the plurality of power storage elements 40. It is a wall formed on the other side in the direction (the Y-axis direction plus side). That is, the wall portion 220 has the first wall portion 220a and the second wall portion 220b forming the groove portion 222 with the first wall portion 220a.

  In addition, in the first wall portion 220a and the second wall portion 220b, a plurality of protrusions from positions different from the positions facing each other on each of the pair of wall surfaces of the first wall portion 220a and the second wall portion 220b facing each other. The projecting portion 223 is formed. Specifically, as shown in FIG. 6B, the first protrusion 223a formed on the first wall 220a is different from the second protrusion 223b formed on the second wall 220b. , Projecting from different positions in the X-axis direction. That is, the first protrusions 223a and the second protrusions 223b are arranged so as to be staggered in the X-axis direction (in a zigzag pattern).

  In the present embodiment, the plurality of protrusions 223 are long ribs extending in the insertion direction of the partition plate 30 (that is, the vertical direction or the Z-axis direction). That is, each of the plurality of protruding portions 223 is formed over the width of the groove portion 222 in the insertion direction (depth direction or Z-axis direction). By thus forming the protrusion 223 over the width of the groove 222 in the insertion direction, the tip portion of the partition plate 30 inserted into the groove 222 can be supported in the insertion direction.

  Note that the plurality of protrusions 223 do not have to be ribs that are long in the insertion direction, and may be protrusions having a shape that protrudes into a substantially conical shape, a substantially semicircular shape, or the like. In this case, the plurality of protrusions are preferably formed not only at different positions in the longitudinal direction of the groove 222 but also at different positions in the insertion direction.

  In addition, the wall portion 220 has a plurality of rectangular second opening portions 221 formed in a notch shape in the upper portion. In the present embodiment, two second openings 221 are formed in each of the three walls 220. The two second openings 221 are formed side by side in the longitudinal direction of the groove 222 formed in the wall 220. Further, each of the two second openings 221 is cut out to the position of the bottom surface of the groove 222. That is, each of the two second openings 221 has an inner surface (lower inner surface) forming the same plane as the bottom surface of the groove 222.

  Next, a configuration in which the partition plate 30 is arranged in the groove portion 222 of the bottom surface side arrangement member 20 will be described in detail.

  FIG. 7 is a perspective view showing a configuration in which the partition plate 30 is arranged at a predetermined position of the groove portion 222 of the bottom surface side arrangement member 20 according to the embodiment of the present invention. FIG. 8 is a perspective view showing a configuration in which the partition plate 30 is not arranged at a predetermined position of the groove portion 222 of the bottom surface side arrangement member 20 according to the embodiment of the present invention. Note that FIG. 8 is a diagram showing a configuration in which the partition plate 30 arranged on the minus side in the Y-axis direction is not arranged at a predetermined position of the groove portion 222.

  As shown in FIG. 7, in the bottom surface side arrangement member 20, when the lower end of the partition plate 30 is inserted up to a predetermined position of the groove portion 222 formed in the wall portion 220, the two second opening portions are inserted. 221 is closed by the lower end of the partition plate 30. In this state, as described above, each of the two second openings 221 has the lower inner surface forming the same plane as the bottom surface of the groove 222, and thus the two second openings 221 are formed. The lower end of the partition plate 30 is in contact with the inner surface of the lower side of 221. In other words, in the first wall 220a and the second wall 220b forming the groove 222, the second opening 221 is formed at a position corresponding to the bottom surface of the groove 222 with which the tip of the partition plate 30 is in contact. Are formed.

  Thereby, the partition plate 30 is inserted to the bottom surface of the groove part 222 (that is, a predetermined position of the groove part 222) by visually recognizing the state where the second opening 221 is closed by the lower end of the partition plate 30. Can be confirmed. In some cases, the tip of the partition plate 30 does not have to be in contact with the bottom surface of the groove 222. That is, even when the partition plate 30 is not inserted into the groove 222 until it comes into contact with the bottom surface, for example, the partition plate 30 is inserted from the second opening 221 to a depth of about 80 to 90% of the groove 222. If it is visible, it may be determined that the partition plate 30 is sufficiently inserted into the groove portion 222.

  On the other hand, as shown in FIG. 8, in the bottom side arrangement member 20, when the lower end of the partition plate 30 is not inserted to the predetermined position of the groove 222 formed in the wall 220, two The second opening 221 is not closed by the lower end of the partition plate 30. That is, in this state, the open space remains in the second opening 221. Furthermore, when the partition plate 30 is inserted into the groove portion 222 in a tilted state, a large amount of open space remains, being biased to one of the two second opening portions 221.

  Thereby, the partition plate can be visually confirmed by observing a state where the second opening 221 is not completely closed by the lower end of the partition plate 30 and the space opened to the second opening 221 remains. It can be confirmed that the bottom surface of the groove portion 222 (that is, a predetermined position of the groove portion) is not inserted. In addition, the partition plate 30 is inserted in the groove 222 in a tilted state by visually recognizing a state in which a large amount of open space remains, being biased to one of the two second openings 221. Can be confirmed.

  Further, when the partition plate 30 is inserted into the groove 222, the first projecting portion 223a and the second projecting portion 223b are arranged in contact with each other from both sides of the partition plate 30 in the Y-axis direction. That is, the first projecting portion 223a and the second projecting portion 223b are spaced in the Y-axis direction between the projecting side end portion of the first projecting portion 223a and the projecting side end portion of the second projecting portion 223b. The (distance) is formed to be substantially equal to the thickness of the partition plate 30.

  Next, a detailed description will be given of a comparison between a configuration in which the bottom surface side arrangement member 20, the partition plate 30, the power storage element 40, and the terminal side arrangement member 50 are assembled, and a configuration in which the partition plate 30 is removed from the configuration.

  FIG. 9 is a perspective view showing a configuration in which the bottom surface side arrangement member 20, the partition plate 30, the power storage element 40, and the terminal side arrangement member 50 according to the embodiment of the present invention are assembled. FIG. 10 is a perspective view showing a configuration in which the bottom surface side arrangement member 20, the power storage element 40, and the terminal side arrangement member 50 according to the embodiment of the present invention are assembled.

  Specifically, FIG. 9A is a perspective view showing the entire configuration in which the bottom surface side arrangement member 20, the partition plate 30, the storage element 40, and the terminal side arrangement member 50 are assembled. FIG. 9B is an enlarged view in which a region around the first opening 520 of the terminal side placement member 50 having the configuration is enlarged. The hatched portion shown in (b) of FIG. 9 indicates the upper surface of the partition plate 30.

  Further, FIG. 10A is a perspective view showing the entire configuration in which the bottom surface side arrangement member 20, the power storage element 40, and the terminal side arrangement member 50 are assembled. FIG. 10B is an enlarged view of an area around the first opening 520 of the terminal side placement member 50 having the configuration, and is an enlarged view of an area corresponding to FIG. 9B.

  As shown in FIG. 9B, when the partition plate 30 is assembled, the partition plate 30 can be visually recognized from the first opening 520, so it is determined that the partition plate 30 is arranged. can do. On the other hand, as shown in FIG. 10B, when the partition plate 30 is not assembled, the partition plate 30 cannot be visually recognized from the first opening 520, so that the partition plate 30 is arranged. You can judge that there is no. That is, the first opening 520 is an opening through which the presence or absence of the partition plate 30 can be visually recognized. From this, the configuration in which the bottom surface side arrangement member 20, the partition plate 30, the power storage element 40, and the terminal side arrangement member 50 are assembled is accommodated in the exterior body 100, and it is confirmed from the side that the partition plate 30 is inserted. Even if it cannot be performed, the presence or absence of the partition plate 30 can be visually recognized from the first opening 520.

  With the above configuration, power storage device 1 can solve the following problems.

  That is, in the power storage device having the conventional configuration, after the power storage element and the holding member (terminal side disposition member) that holds the electrode terminal side portion of the power storage element are assembled, the side disposition (partitioner) of the power storage element is separated. The plate) may be hidden behind the holding member or the storage element. Therefore, there is a problem that it is difficult to confirm whether or not the object is arranged on the side of the power storage element.

  According to power storage device 1 according to the present embodiment, terminal-side placement member 50 that is placed on the electrode terminal side of power storage element 40 is located at a position facing the surface on the electrode terminal side of partition plate 30 as the placement object. It has a first opening 520. Therefore, even after the terminal side placement member 50 and the storage element 40 are assembled, the presence or absence of the partition plate 30 can be easily visually recognized from the first opening 520. Therefore, workability at the time of assembling the power storage device 1 can be improved.

  In addition, in the power storage device having the conventional configuration, by mounting the placement object (partition plate) on the holding member (bottom surface side placement member) that holds the lower portion of the power storage element, a predetermined position on the side of the power storage element is obtained. There is a configuration in which an arrangement object is arranged. In this case, after the holding member and the placement object are assembled, a part of the placement object may be hidden behind the holding member. Therefore, whether the placement object is placed at a predetermined position on the side of the power storage element. There is a problem that it is difficult to confirm whether or not.

  According to power storage device 1 according to the present embodiment, bottom surface side arrangement member 20 arranged on the side opposite to the electrode terminal of power storage element 40 has the end on the side opposite to the electrode terminal of partition plate 30 as the arrangement object. It has a wall 220 formed laterally of the part. The wall 220 has a second opening 221 at a position facing the end of the partition plate 30. Therefore, even after the bottom surface side arrangement member 20 and the partition plate 30 are assembled, the arrangement position of the partition plate 30 can be easily visually recognized from the second opening 221. Therefore, workability at the time of assembling the power storage device 1 can be improved.

  Further, the tip of the partition plate 30 of the groove portion 222 is in contact with the first wall portion 220a and the second wall portion 220b forming the groove portion 222 into which the partition plate 30 provided on the side of the power storage element 40 is inserted. The second opening 221 is formed at a position corresponding to the bottom surface in contact with the second opening 221. Therefore, even after the bottom surface side arrangement member 20 and the partition plate 30 are assembled, the insertion state of the partition plate 30 into the groove 222 of the partition plate 30 can be easily visually recognized. Therefore, workability at the time of assembling the power storage device 1 can be improved.

  Further, from the above-described configuration, power storage device 1 according to the present embodiment includes power storage element 40, and terminal side arrangement member 50 and bottom surface side arrangement member 20 as a holding member that holds power storage element 40. The terminal-side arrangement member 50 and the bottom-side arrangement member 20 respectively serve as openings formed at positions facing the partition plate 30 as an arrangement provided on the side of the power storage element 40. It can be said to have one opening 520 and the second opening 221.

  That is, the terminal-side arrangement member 50 and the bottom-side arrangement member 20 as holding members are located at the positions facing the partition plate 30 provided on the side of the power storage element 40, respectively, at the first opening 520 and the second opening. 221 is included. Therefore, when the power storage device 1 is assembled, the presence or absence of the partition plate 30 and the arrangement state such as the arrangement position can be easily visually recognized from the first opening 520 or the second opening 221. Therefore, workability at the time of assembling the power storage device 1 can be improved.

  Further, since the plurality of second openings 221 are formed side by side in the longitudinal direction of the groove 222 in the first wall 220a and the second wall 220b, the partition plate 30 is formed from the plurality of second openings 221. It is possible to confirm the insertion state of the groove into the groove 222. This makes it possible to confirm whether or not the partition plate 30 is inserted in the groove portion 222 in a tilted state, so that the posture of the partition plate can be easily confirmed. Therefore, workability at the time of assembling the power storage device 1 can be improved.

  In addition, the first wall portion 220a and the second wall portion 220b each have a plurality of protrusions from positions different from the positions facing each other on each of the pair of wall surfaces of the first wall portion 220a and the second wall portion 220b facing each other. The projecting portion 223 is formed. Thus, when the partition plate 30 is inserted into the groove 222, the plurality of protrusions 223 uniformly contact the partition plate 30. In addition, in the width direction of the groove 222, the first protruding portion 223a and the first protruding portion 223a are more than the distance between the first protruding portion 223a provided on one wall surface and the second protruding portion 223b provided on the other wall surface. It is possible to widen the interval between the wall surface facing the protrusion 223a. Here, in the width direction of the groove 222, the distance between the first protrusion 223a provided on one wall surface and the second protrusion 223b provided on the other wall surface is substantially equal to the thickness of the partition plate 30. . That is, the gap between the first protrusion 223a and the wall surface facing the first protrusion 223a can be made wider than the thickness of the partition plate 30. Accordingly, the partition plate 30 can be easily inserted, and the inserted partition plate 30 can be a groove portion 222 that can be firmly held by the plurality of protrusions 223.

  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 claims, and is intended to include meanings equivalent to the claims and all modifications within the scope. 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 embodiment, the arrangement is the partition plate 30 that partitions two adjacent power storage elements 40. However, the placed object is not limited to the partition plate 30, and may be a spacer for maintaining the intervals between the plurality of power storage elements 40. Further, the placed object may be an insulating member that insulates between the plurality of power storage elements 40, between the power storage element 40 and the exterior body, between the power storage element 40 and another electric device, or the like. Further, the arranged object may be an elastic member that is arranged between the plurality of power storage elements 40 and applies a predetermined load to the side surfaces of the plurality of power storage elements 40. Further, the arranged object may be a member having a function of combining two or more of a spacer, an insulating member, and an elastic member. Further, the arranged object may be various sensors for detecting the state of the storage element, such as a temperature sensor (thermistor) for detecting the temperature of the storage element and a voltage sensor for detecting the voltage value of the storage element. Good.

  Further, in the above-described embodiment, the bottom surface side arrangement member 20 is configured such that the lower end portion of the partition plate 30 is inserted into the groove portion 222. However, the bottom surface side arrangement member 20 may not have the groove portion 222 into which the lower end portion of the partition plate 30 is inserted, and may be a wall that supports the partition plate 30 (or other arranged object) laterally. It may be configured to have a section.

  Moreover, in the said embodiment, the bottom surface side arrangement | positioning member 20 decided that the 2nd opening part 221 was formed in the 1st wall part 220a and the 2nd wall part 220b. However, the second opening may be formed in one of the first wall 220a and the second wall 220b. That is, it is sufficient that the second opening is formed in at least one of the first wall 220a and the second wall 220b.

  In addition, in the above-described embodiment, power storage device 1 includes a plurality of power storage elements 40. However, the power storage device may be configured to include one power storage element 40. Even in this case, when the terminal side arrangement member is arranged on the electrode terminal side of the electricity storage device 40, the terminal side arrangement member is opened at a position facing an arrangement object arranged on the side of the electricity storage device 40. Any structure may be used as long as it has a section. When the placed object is arranged laterally of the wall portion of the bottom surface side arrangement member, the bottom surface side arrangement member is a wall portion formed beside the arrangement object arranged laterally of the electricity storage device 40. In addition, any structure may be used as long as it has an opening.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a power storage device or the like that can improve workability during assembly.

DESCRIPTION OF SYMBOLS 1 Electric storage device 10 Exterior body 20 Bottom surface side arrangement member 40 Electric storage element 50 Terminal side arrangement member 60 Bus bar 70 Substrate 100 Exterior body body 110 Lid body 111 Positive electrode external terminal 112 Negative electrode external terminal 210 Recess 220 Wall part 220a First wall part 220b No. Two wall part 221 Second opening part 222 Groove part 223 Projection part 223a First projection part 223b Second projection part 410 Container 420 Container lid part 430 Positive electrode terminal 440 Negative electrode terminal 510 Terminal exposed part 520 First opening part 530 Substrate mounting part

Claims (5)

A plurality of storage elements,
A holding member for holding the plurality of power storage elements,
The holding member has a second holding member arranged on the side opposite to the electrode terminals of the plurality of power storage elements,
The second holding member has a wall portion formed laterally to the opposite end portion of the arrangement provided between the plurality of power storage elements,
The wall portion is disposed at a position facing the end portion of the placement object, and a second opening portion penetrating the second holding member in a second direction facing the end portion of the placement object. Power storage device having a . The holding member has a first holding member arranged on the electrode terminal side of the plurality of power storage elements,
The first holding member is arranged at a position facing a surface of the arrangement on the side of the electrode terminal, and faces the surface of the arrangement on the side of the electrode terminal, which is different from the second direction. the power storage device according to claim 1 having a first opening extending through the first holding member in the first direction. The power storage device includes, as the arrangement, a partition plate provided between the plurality of power storage elements,
The wall portion has a first wall portion and a second wall portion that is arranged to face the first wall portion and forms a groove portion into which the partition plate is inserted with the first wall portion,
The second opening portion is formed in at least one of the first wall portion and the second wall portion at a position corresponding to a bottom surface of the groove portion with which the tip of the partition plate is in contact. The power storage device according to 1 or 2 . The power storage device according to claim 3 , wherein a plurality of the second openings are formed side by side in at least one of the first wall portion and the second wall portion in a longitudinal direction of the groove portion. In the first wall portion and the second wall portion, a plurality of protrusions protruding from positions different from the positions facing each other on each of the pair of wall surfaces of the first wall portion and the second wall portion facing each other. the power storage device according to claim 3 or 4 parts are formed.

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