WO2020189657A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2020189657A1
WO2020189657A1 PCT/JP2020/011623 JP2020011623W WO2020189657A1 WO 2020189657 A1 WO2020189657 A1 WO 2020189657A1 JP 2020011623 W JP2020011623 W JP 2020011623W WO 2020189657 A1 WO2020189657 A1 WO 2020189657A1
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WO
WIPO (PCT)
Prior art keywords
power storage
plate material
storage element
outer plate
element unit
Prior art date
Application number
PCT/JP2020/011623
Other languages
French (fr)
Japanese (ja)
Inventor
彰吾 ▲つる▼田
彬 和田
拓也 中畑
Original Assignee
株式会社Gsユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Gsユアサ filed Critical 株式会社Gsユアサ
Priority to JP2021507354A priority Critical patent/JPWO2020189657A1/ja
Publication of WO2020189657A1 publication Critical patent/WO2020189657A1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222Inorganic material
    • H01M50/224Metals
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present invention relates to a power storage device including a plurality of power storage elements.
  • Patent Document 1 discloses a power storage device having a storage battery group.
  • rectangular end plates are arranged at both ends of the storage battery group in the stacking direction with an insulator plate having a heat insulating function and an insulating function interposed therebetween.
  • the end plates are connected to each other by a pair of connecting bands extending in the stacking direction.
  • An object of the present invention is to provide a power storage device provided with a plurality of power storage elements and having improved safety.
  • the power storage device includes a power storage element unit having a plurality of power storage elements and an end member having a portion arranged laterally in the first direction of the power storage element unit.
  • the inner plate material and the outer plate material are arranged so as to be stacked in the first direction, and the inner plate material abuts on the first side surface, which is the side surface on the first direction side of the power storage element unit, and the power storage
  • the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit in the second direction intersecting the first direction, which is arranged between the element unit and the outer plate material.
  • the width of the outer plate material in the second direction is larger than the width of the inner plate material in the second direction.
  • a power storage device including a plurality of power storage elements and with improved safety.
  • FIG. 1 is a perspective view showing the appearance of the power storage device according to the embodiment.
  • FIG. 2 is an exploded perspective view showing an internal configuration of the power storage device according to the embodiment.
  • FIG. 3 is an exploded perspective view showing a detailed internal configuration of the power storage device according to the embodiment.
  • FIG. 4 is a perspective view showing the end member according to the embodiment separated from the power storage element unit.
  • FIG. 5 is an exploded perspective view showing each of the end member and the power storage element unit according to the embodiment in an exploded manner.
  • FIG. 6 is a perspective view showing a magnitude relationship between the components of the end member and the width of the end face of the unit according to the embodiment.
  • FIG. 7 is a front view showing the magnitude relationship between the components of the end member and the vertical width of the end face of the unit according to the embodiment.
  • FIG. 8 is a perspective view of the end member according to the embodiment.
  • the power storage device includes a power storage element unit having a plurality of power storage elements and an end member having a portion arranged laterally in the first direction of the power storage element unit.
  • the inner plate material and the outer plate material are arranged so as to be stacked in the first direction, and the inner plate material abuts on the first side surface, which is the side surface on the first direction side of the power storage element unit, and the power storage
  • the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit in the second direction intersecting the first direction, which is arranged between the element unit and the outer plate material.
  • the width of the outer plate material in the second direction is larger than the width of the inner plate material in the second direction.
  • the end member has a portion where at least two plate members are overlapped with each other, so that the strength required for protection can be obtained.
  • the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit and the width of the outer plate material is larger than the width of the inner plate material, there is a space that facilitates the inward deformation of the outer plate material. To do. Therefore, when a large external force suitable for the power storage element unit acts on the outer plate material, the outer plate material is deformed and the external force can be absorbed. This reduces the possibility of damage to the power storage element unit.
  • the end member according to this embodiment has a predetermined strength by stacking a plurality of plate materials, and the width of the outer plate material is larger than the width of the inner plate material, so that the end member has a deformability capable of absorbing impact.
  • the power storage device according to this aspect is a power storage device with improved safety.
  • the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit, and the inner plate material is viewed from the first direction. In that case, it may be arranged in the outer shape region of the first side surface.
  • the inner plate material is formed in a size smaller than the outer shape of the first side surface of the power storage element unit when viewed from the first direction, and is arranged in the outer shape region of the first side surface. .. Therefore, since the space in which the outer plate material can be easily deformed increases, the effect of absorbing the external force by the outer plate material is improved, and as a result, the safety of the power storage device is improved.
  • Each of the plurality of power storage elements may be arranged side by side in the first direction with the long side surface facing the first direction.
  • the end member is arranged on the outside of the long side surface of the power storage element located at the end in the first direction.
  • the long side surface which is a easily deformable portion of the power storage element, is protected, and the expansion of the long side surface is efficiently suppressed.
  • the safety of the power storage device is improved.
  • Each of the plurality of power storage elements may be arranged side by side with the short side surface facing the first direction and the long side surfaces of the two power storage elements adjacent to each other facing each other.
  • the end member is arranged on the outside of the short side surface of the plurality of power storage elements.
  • the end member further has an intermediate plate material arranged between the inner plate material and the outer plate material, and the intermediate plate material includes a first intermediate plate portion facing the inner plate material and the power storage element unit. It has a second intermediate plate portion facing the second side surface adjacent to the first side surface, and the outer plate material includes a first outer plate portion facing the first intermediate plate portion of the intermediate plate material and the intermediate plate material. It may have a second outer plate portion facing the second intermediate plate portion of the above.
  • both the first side surface and the second side surface of the power storage element unit are protected by the end member. Therefore, the safety of the power storage device is further improved.
  • the end members are arranged on both sides of the power storage element unit in the first direction, and the second outer plate portion of the outer plate material of one of the two end members is the two ends. It may have a connecting portion connected to the second outer plate portion of the other outer plate material of the member.
  • the pair of end members protect both first side surfaces of the power storage element unit in the first direction and the second side surface connecting these first side surfaces.
  • the pair of end members are mechanically connected to each other by connecting the two second outer plate portions. Therefore, one end member functions as a member for reinforcing the other end member. Therefore, the safety of the power storage device is further improved.
  • the present invention can also be realized as an end member arranged for a power storage element unit including a plurality of power storage elements.
  • the longitudinal direction of the housing (opposite direction of the short side surface of the housing) or the facing direction of the short side surface of one power storage element is defined as the X-axis direction.
  • the lateral direction of the housing (opposite direction of the long side surface of the housing) or the facing direction of the long side surface of one power storage element is defined as the Y-axis direction.
  • the alignment direction of the main body portion and the fixed wall portion in the housing, or the longitudinal direction of the short side surface of the power storage element is defined as the Z-axis direction.
  • the Z-axis direction is the vertical direction and the Z-axis direction plus side is the “upper”, but this does not limit the posture when the actual power storage device is used.
  • Each drawing may differ from the actual shape, positional relationship, and ratio by appropriately emphasizing, omitting, or adjusting the ratio in order to show the present invention.
  • the plus side in the X-axis direction indicates the arrow direction side of the X-axis
  • the minus side in the X-axis direction indicates the side opposite to the plus side in the X-axis direction.
  • expressions indicating relative directions or postures such as parallel and orthogonal include cases where they are not strictly the directions or postures.
  • the fact that the two directions are orthogonal not only means that the two directions are completely orthogonal, but also that they are substantially orthogonal, that is, that they include a difference of about several percent. Also means.
  • FIG. 1 is a perspective view showing the appearance of the power storage device 10 according to the embodiment.
  • FIG. 2 is an exploded perspective view showing the internal configuration of the power storage device 10 according to the embodiment.
  • FIG. 3 is an exploded perspective view showing a detailed internal configuration of the power storage device 10 according to the embodiment.
  • the power cable 20 and the electric wire 30 for connecting the power storage device 10 and the external device are not shown.
  • the power storage device 10 is a device capable of charging electricity from the outside and discharging electricity to the outside.
  • the power storage device 10 is a battery module used for power storage, power supply, and the like.
  • the power storage device 10 includes automobiles such as electric vehicles (EV), hybrid electric vehicles (HEV) or plug-in hybrid electric vehicles (PHEV), motorcycles, watercraft, snowmobiles, agricultural machinery, construction machinery and the like. It is used for driving a moving body, starting an engine or backing up, or for stationary use for home use or a generator.
  • the power storage device 10 includes a power storage element unit 200 having a plurality of power storage elements 210, and a housing 100 for accommodating the power storage element units 200.
  • the power storage element unit 200 has four power storage elements 210.
  • the number of power storage elements 210 included in the power storage element unit 200 is not limited to four.
  • the power storage element unit 200 may include a plurality of power storage elements 210.
  • the housing 100 forms a space for accommodating the power storage element unit 200 and the like between the fixed wall portion 140 provided with the fixing portion 145 for fixing the power storage device 10 to the other member 500 and the fixed wall portion 140. It has a box-shaped main body 105 and the like. As shown in FIG. 3, the fixed wall portion 140 is provided with a plurality of screw holes 146 for fixing the power storage element unit 200. The end member 300 and the power storage element unit 200 are fixed to the upper surface of the fixed wall portion 140 by screwing each of the plurality of bolts 50 penetrating the end member 300, which will be described later, into the screw holes 146. Further, the main body 105 is arranged so as to surround the end member 300 and the power storage element unit 200.
  • each element such as the power storage element unit 200 is arranged on the upper surface of the flat plate-shaped fixed wall portion 140 as a whole, and the main body portion 105 is arranged so as to cover these power storage element units 200 and the like from above and from the side.
  • the fixing portion 145 of the fixing wall portion 140 is provided with a fixing opening 145a, and the fixing opening 106 is provided at the end of the main body portion 105.
  • the bolt 40 inserted through the fixing opening 106 and the fixing opening 145a is screwed into the screw hole (or nut) of the other member 500. That is, the main body portion 105 and the fixed wall portion 140 are fastened together with the other member 500 by the bolt 40.
  • four such fixing points of the housing 100 are provided, and the power storage device 10 is fixed to the other member 500 by these four fixing points.
  • one wall portion (wall portion on the plus side in the X-axis direction) of the main body portion 105 is provided with an exhaust pipe 190 and an external connection portion 195 arranged above the exhaust pipe 190.
  • the exhaust pipe 190 is a member for guiding the gas to the outside of the housing 100 when the gas is discharged from the gas discharge valves of one or more power storage elements 210 in the housing 100.
  • the external connection unit 195 is a member that holds a pair of power cables 20 connected to the positive electrode and the negative electrode of the power storage element unit 200, and a plurality of electric wires 30 connected to a BMU (Battery Management Unit) 400 described later.
  • BMU Battery Management Unit
  • the pair of power cables 20 and the plurality of electric wires 30 extend to the outside from the external connection portion 195, but each of the pair of power cables 20 and the plurality of electric wires 30 is located at the position of the external connection portion 195. , May have a connector for connecting to an external device.
  • the housing 100 is made of a metal such as iron and has a box-shaped main body 105
  • the power storage device 10 is relatively small and has an outer shell (that is, the housing 100). It has the characteristic of high strength. Therefore, the power storage device 10 is mounted on the automobile as a battery for operating the electric device mounted on the automobile or as a backup battery for guaranteeing the operation. Therefore, as another member 500 to which the power storage device 10 is fixed, an automobile body is exemplified.
  • the other member 500 is simply represented as a rectangular plate-shaped member, but the other member 500 has a size and shape as long as it has a portion to which the power storage device 10 can be fixed. Is not particularly limited.
  • the housing 100 has a support wall portion 110 which is one of a plurality of wall portions other than the fixed wall portion 140, and the support wall portion 110 has an attachment portion 120 for attaching a supported member. are doing.
  • a supported member larger than the support wall portion 110 can be attached to the mounting portion 120 when viewed from the side of the supported member.
  • the mounting portion 120 has a mounting hole 120a that is screwed with a bolt or the like for mounting the supported member.
  • the power storage device 10 When the power storage device 10 is mounted on an automobile, the power storage device 10 can be arranged between the driver's seat and the passenger's seat because the power storage device 10 is relatively small.
  • the console box including the drink holder and the like can be attached to the four attachment portions 120 arranged on the support wall portion 110 in the present embodiment. That is, the power storage device 10 can function as a support member for supporting the console box.
  • a BMU (Battery Management Unit) 400 that controls charging / discharging of the power storage element unit 200 is further housed inside the housing 100.
  • the BMU 400 is fixed to the upper surface of the fixing wall portion 140 with a plurality of bolts. It is not essential that the power storage device 10 incorporates the BMU 400, and the charge / discharge control of the power storage element unit 200 may be performed by an external device.
  • the power storage element unit 200 is held in a state of being sandwiched between end members 300 facing each other in the arrangement direction (Y-axis direction) of the power storage elements 210.
  • a plurality of bus bars 250 for electrically and mechanically connecting a plurality of power storage elements 210
  • a bus bar frame 255 for holding the plurality of bus bars 250.
  • the bus bar frame 255 is provided with a plurality of bus bar openings 256, each of the plurality of bus bars 250 being arranged in any of the plurality of bus bar openings 256, and one or two power storage elements below the bus bar frame 255. Joined to 210.
  • the cover member 280 is further arranged above the power storage element unit 200, and the bus bar 250 is arranged between the power storage element unit 200 and the cover member 280. That is, the bus bar frame 255 is arranged between the power storage element unit 200 and the cover member 280.
  • FIG. 4 is a perspective view showing the end member 300 according to the embodiment separated from the power storage element unit 200.
  • FIG. 5 is an exploded perspective view showing each of the end member 300 and the power storage element unit 200 according to the embodiment in an exploded manner.
  • the power storage device 10 includes an end member 300 having a portion of the power storage element unit 200 arranged laterally in the Y-axis direction.
  • the Y-axis direction is an example of the first direction, and in the present embodiment, it coincides with the arrangement direction of the plurality of power storage elements 210 in the power storage element unit 200.
  • the long side surfaces 211 of the plurality of power storage elements 210 are arranged in the Y-axis direction in a posture orthogonal to the Y-axis direction (in other words, a posture in which the short side surfaces 212 are parallel to the Y-axis direction).
  • the power storage element unit 200 includes a plurality of power storage elements 210, a spacer 220 arranged between two adjacent power storage elements 210, and an arrangement direction (Y-axis direction) of the plurality of power storage elements 210. It has end spacers 225 arranged at both ends of the above. That is, in the present embodiment, the unit end surface 201, which is the side surface of the power storage element unit 200 in the Y-axis direction, is formed by the outer surface of the end spacer 225.
  • the unit end face 201 is an example of the first side surface. In the present embodiment, the unit end face 201 is not a simple flat surface, but has a concave or convex portion (concave and convex portion) as shown in FIG. Therefore, the term "contacting the unit end face 201" includes not only contacting the flat portion of the unit end face 201 but also contacting the surface of the uneven portion.
  • the end member 300 is arranged in contact with the end face 201 of the unit.
  • the end member 300 is composed of an inner plate material 310 that abuts on the end surface 201 of the unit and a plate material arranged outside the inner plate material 310.
  • the intermediate plate material 320 and the outer plate material 330 are arranged outside the inner plate material 310.
  • Each of the intermediate plate material 320 and the outer plate material 330 is an example of the "outer plate material" in relation to the inner plate material 310.
  • Each of the inner plate material 310, the intermediate plate material 320, and the outer plate material 330 is produced by performing press working or the like on a metal plate material such as iron. Further, the end member 300 is manufactured by welding these plate materials. The inner plate material 310 and the intermediate plate material 320 are overlapped and welded. The intermediate plate material 320 of the inner plate material 310 and the intermediate plate material 320 integrated by welding is welded to the outer plate material 330 through a plurality of joining openings 312 (see FIG. 5) provided in the inner plate material 310. .. As a result, the end member 300 having a structure in which the inner plate material 310, the intermediate plate material 320, and the outer plate material 330 are laminated is formed.
  • the intermediate plate member 320 has a first intermediate plate portion 321 facing the inner plate material 310 and a second intermediate plate portion 325 facing the unit side surface 202.
  • the unit side surface 202 is a side surface adjacent to the unit end surface 201.
  • the unit side surface 202 is an example of the second side surface, and is a side surface of the power storage element unit 200 in the X-axis direction. That is, the first intermediate plate portion 321 and the second intermediate plate portion 325 are connected in a posture orthogonal to each other. Second intermediate plate portions 325 are provided at both ends of the first intermediate plate portion 321 in the X-axis direction.
  • the intermediate plate member 320 configured in this way is arranged with respect to the power storage element unit 200 in a state of surrounding the end portion of the power storage element unit 200 in the Y-axis direction from three directions as a part of the end member 300.
  • the outer plate material 330 has a first outer plate portion 331 facing the first intermediate plate portion 321 of the intermediate plate material 320 and a second intermediate plate portion 325 facing the second intermediate plate portion 325 of the intermediate plate material 320. (Ii) It has an outer plate portion 335. That is, the first outer plate portion 331 and the second outer plate portion 335 are connected in a posture orthogonal to each other. Second outer plate portions 335 are provided at both ends of the first outer plate portion 331 in the X-axis direction.
  • the outer plate material 330 configured in this way is arranged with respect to the power storage element unit 200 in a state of surrounding the end portion of the power storage element unit 200 in the Y-axis direction from three directions as a part of the end member 300.
  • the second intermediate plate portion 325 of the intermediate plate material 320 has a through hole 325a in a portion opened to the outside of the lower end portion, and the second outer plate portion 335 of the outer plate material 330 penetrates into a portion opened to the outside of the lower end portion. It has a hole 335a.
  • the through hole 335a of the outer plate material 330 is arranged directly above the through hole 325a of the intermediate plate material 320. Further, the bolt 50 is inserted into the through hole 335a and the through hole 325a and screwed into the screw hole 146 of the fixed wall portion 140 (see FIG. 3).
  • the end member 300 and the power storage element unit 200 are fixed to the fixed wall portion 140.
  • the end member 300 is also provided with a through hole 335a and a through hole 325a on the minus side in the X-axis direction, and one end member 300 is fixed by two bolts 50. It is fixed to the wall portion 140.
  • the end members 300 having the above configuration are arranged on both sides of the power storage element unit 200 in the Y-axis direction, as shown in FIGS. 4 and 5. These pair of end members 300 are connected by a connection plate 380 arranged above the power storage element unit 200.
  • the two shaft portions 329 provided on the end member 300 are inserted into the two through holes of the connection plate 380 and tightened with the nut 90.
  • the pair of end members 300 are connected by the connecting plate 380.
  • the two shaft portions 329 are fixed to the intermediate plate material 320.
  • the intermediate plate material 320 has a protruding portion 328 that projects upward from the upper end of the first intermediate plate portion 321 of the power storage element unit 200, and is erected upward at the protruding portion 328.
  • a shaft portion 329 is provided.
  • the outer plate material 330 has a protruding portion 332 that protrudes upward from the power storage element unit 200 from the upper end of the first outer plate portion 331, and the protruding portion 332 is provided with a through hole 332a through which the shaft portion 329 penetrates. There is.
  • the pair of end members 300 have a structure in which the outer plate members 330 are fastened to each other with bolts 60 and nuts 62.
  • the second outer plate portion 335 of the outer plate material 330 located on the outermost side of the end member 300 is provided with a connecting portion 336 connected to the second outer plate portion 335 of the end member 300 of the connection partner.
  • the connecting portion 336 is formed by bending the tip portion of the second outer plate portion 335 outward, and the second outer plate portion is formed as a plate-like portion parallel to the first outer plate portion 331. It is provided at 335.
  • a plurality of (three in this embodiment) through holes 336a are formed in the connecting portion 336. As shown in FIG.
  • the two end members 300 sandwiching the power storage element unit 200 are connected by a connection plate 380 arranged above, and both left and right (X-axis directions) ends are fastened.
  • one of the two end members 300 can firmly restrain the other in the front-rear direction (Y-axis direction).
  • the two end members 300 connected to each other in this way are fastened to the fixed wall portion 140 by a plurality of bolts 50. That is, the two end members 300 and the power storage element unit 200 sandwiched between them are firmly fixed to the fixed wall portion 140.
  • the end member 300 arranged in contact with the side surface of the power storage element unit 200 is formed of a plurality of stacked plate materials, and in the present embodiment, the sizes and shapes of the plurality of plate materials are different from each other. There is. This point will be described with reference to FIGS. 6 to 8.
  • FIG. 6 is a perspective view showing a magnitude relationship between the components of the end member 300 and the width of the unit end face 201 according to the embodiment.
  • FIG. 7 is a front view showing the magnitude relationship between the components of the end member 300 and the vertical width of the unit end face 201 according to the embodiment.
  • FIG. 8 is a perspective view of the end member 300 according to the embodiment.
  • the "horizontal width” is the width in the X-axis direction
  • the "vertical width” is the width in the Z-axis direction.
  • FIG. 7 shows a view of the power storage element unit 200 when viewed from the side of the unit end surface 201, and the approximate arrangement area of the inner plate material 310 with respect to the unit end surface 201 is the inner plate arrangement area 310a (dotted). Area).
  • the width Wa of the inner plate material 310 that abuts on the unit end surface 201 is smaller than the width Ws of the unit end surface 201.
  • the width Wb of the intermediate plate material 320 and the width Wc of the outer plate material 330 located outside the inner plate material 310 in the end member 300 are both larger than the width Wa of the inner plate material 310.
  • the width Wc of the outer plate material 330 is larger than the width Wb of the intermediate plate material 320.
  • Each of the width Wc of the outer plate material 330 and the width Wb of the intermediate plate material 320 is based on a portion facing the unit end surface 201 in the Y-axis direction.
  • the width Wc of the outer plate material 330 is the width of the first outer plate portion 331
  • the width Wb of the intermediate plate material 320 is the width of the first intermediate plate portion 321. This also applies to the vertical width of the outer plate material 330 and the vertical width of the intermediate plate material 320.
  • the inner plate material 310 having a width smaller than that of the unit end surface 201 is in contact with the unit end surface 201, and the intermediate plate material 320 and the outer plate material 330 having a width larger than that of the inner plate material 310 are arranged outside the inner plate material 310.
  • the inner plate member 310 is not remarkably biased toward the plus side or the minus side in the X-axis direction with respect to the intermediate plate member 320 and the unit end face 201.
  • the center of the inner plate member 310 in the X-axis direction coincides with the center of the intermediate plate member 320 and the unit end face 201 in the X-axis direction (including substantially matching, the same applies hereinafter).
  • the positive or negative end portion of the inner plate member 310 in the X-axis direction is separated from the second intermediate plate portion 325 of the intermediate plate member 320 and the unit end surface 202 by a predetermined distance in the X-axis direction.
  • the vertical width Ha of the inner plate material 310 that abuts on the unit end surface 201 is smaller than the vertical width Hs of the unit end surface 201.
  • the vertical width Hb of the intermediate plate material 320 and the vertical width Hc of the outer plate material 330 located outside the inner plate material 310 in the end member 300 are both larger than the vertical width Ha of the inner plate material 310.
  • the vertical width Hc of the outer plate material 330 is larger than the vertical width Hb of the intermediate plate material 320.
  • the inner plate material 310 is not remarkably biased to the plus side or the minus side in the Z-axis direction with respect to the intermediate plate material 320 and the unit end face 201.
  • the center of the inner plate member 310 in the Z-axis direction coincides with the center of the intermediate plate member 320 and the unit end face 201 in the Z-axis direction.
  • the power storage device 10 has a power storage element unit 200 having a plurality of power storage elements 210 and a side of the power storage element unit 200 in the first direction (Y-axis direction in the present embodiment). It includes an end member 300 having a portion arranged in the direction.
  • the end member 300 includes an inner plate material 310 and an outer plate material 330 arranged so as to be overlapped in the Y-axis direction.
  • the inner plate material 310 comes into contact with the unit end surface 201, which is the side surface of the power storage element unit 200 on the Y-axis direction side.
  • the inner plate material 310 is arranged between the power storage element unit 200 and the outer plate material 330, and the width of the inner plate material 310 is set in the second direction (X-axis direction in the present embodiment) intersecting the Y-axis direction. It is smaller than the width of the unit end face 201.
  • the width of the outer plate material 330 in the X-axis direction is larger than the width of the inner plate material 310 in the X-axis direction.
  • the end member 300 can obtain the strength required for protection by having a portion where at least two plate members are overlapped. Further, since the width of the inner plate material 310 is smaller than the width of the unit end face 201 and the width of the outer plate material 330 is larger than the width of the inner plate material 310, there is a space that facilitates the inward deformation of the outer plate material 330. To do. That is, as shown in FIG. 8, there is a space in which the inner plate material 310 is not arranged at the end portion of the outer plate material 330 in the X-axis direction.
  • This space is a space in which the inward deformation of the outer plate material 330 is not hindered by the inner plate material 310. Therefore, when a large external force suitable for the power storage element unit 200 acts on the outer plate material 330, the outer plate material 330 is deformed to absorb the external force. This reduces the possibility of damage to the power storage element unit 200. That is, the end member 300 according to the present embodiment has a predetermined strength by stacking a plurality of plate materials, and the width of the outer plate material 330 is larger than the width of the inner plate material 310, so that shock absorption is achieved. It also has possible deformability. As described above, the power storage device 10 according to the present embodiment is a power storage device with improved safety.
  • the rigidity of the portion where high rigidity is required is secured by partially increasing the thickness instead of increasing the total thickness, and the deformation of the end member 300 is performed. We have secured a space for this. Further, in the end member 300, since the difference in thickness of each part is realized by stacking a plurality of plate materials, the end member 300 is machined from a single material, or the end member 300 is manufactured by a mold. The end member 300 is easier to manufacture than the above.
  • two adjacent plate materials are mechanically connected by welding. Therefore, as compared with the case where two adjacent plate members are connected by bolts and nuts, rivets, or the like, the weight of the power storage device 10 can be reduced or the number of parts can be reduced. This has the effect of saving space and weight of the power storage device 10.
  • the width of the inner plate material 310 is made smaller than the width of the unit end face 201, thereby suppressing the increase in size of the power storage device 10 and the outer plate material 330. A space is secured to facilitate the inward deformation of the.
  • the "outer plate material 330" can be replaced with the "intermediate plate material 320". That is, as described with reference to FIG. 6, the width of the intermediate plate material 320 arranged outside the inner plate material 310 is larger than the width of the inner plate material 310. Therefore, as shown in FIG. 8, at the end of the intermediate plate material 320 in the X-axis direction, there is a space in which the inner plate material 310 is not arranged, and in this space, the intermediate plate material 320 is deformed inward. It is a space that is not obstructed by the plate material 310. Therefore, the intermediate plate material 320 can be deformed so as to protect the power storage element unit 200.
  • the "X-axis direction" which is the second direction can be replaced with the "Z-axis direction”. That is, as described with reference to FIG. 7, the vertical width of the outer plate material 330 arranged outside the inner plate material 310 is larger than the vertical width of the inner plate material 310. Therefore, at the end of the outer plate material 330 in the Z-axis direction, there is a space in which the inner plate material 310 is not arranged, and this space is a space in which the inward deformation of the outer plate material 330 is not hindered by the inner plate material 310. is there. Therefore, the outer plate material 330 can be deformed so as to protect the power storage element unit 200.
  • the width of the inner plate member 310 is the unit end face in the third direction (Z-axis direction in the present embodiment) intersecting the first direction (Y-axis direction) and the second direction (X-axis direction). It is smaller than the width of 201.
  • the inner plate member 310 is arranged in the outer shape region of the unit end face 201 when viewed from the Y-axis direction (see FIG. 7).
  • the inner plate material 310 is formed in a size smaller than the outer shape of the unit end face 201 when viewed from the X-axis direction, and is arranged in the outer shape region of the unit end face 201. Therefore, the space for facilitating the deformation of the outer plate material 330 is increased, and the effect of absorbing the external force by the outer plate material 330 is improved. As a result, the safety of the power storage device 10 is improved. This also applies to the intermediate plate material 320 between the inner plate material 310 and the outer plate material 330.
  • the inner plate material 310 is smaller than the unit end face 201, the space for facilitating the deformation of the intermediate plate material 320 is increased, and thus the effect of absorbing the external force by the intermediate plate material 320 is improved. This contributes to the improvement of the safety of the power storage device 10.
  • each of the plurality of power storage elements 210 is arranged side by side in the Y-axis direction with the long side surface 211 facing the Y-axis direction.
  • the end member 300 is arranged outside the long side surface 211 of the power storage element 210 located at the end in the Y-axis direction.
  • the long side surface 211 which is a easily deformable portion of the power storage element 210, is protected, and the expansion of the long side surface 211 is efficiently suppressed.
  • the safety of the power storage device 10 is improved.
  • the end member 300 has an intermediate plate material 320 arranged between the inner plate material 310 and the outer plate material 330.
  • the intermediate plate member 320 has a first intermediate plate portion 321 facing the inner plate material 310 and a second intermediate plate portion 325 facing the unit side surface 202 of the power storage element unit 200.
  • the outer plate material 330 has a first outer plate portion 331 facing the first intermediate plate portion 321 of the intermediate plate material 320, and a second outer plate portion 335 facing the second intermediate plate portion 325 of the intermediate plate material 320.
  • the end member 300 protects both the unit end surface 201 and the unit side surface 202 of the power storage element unit 200. Therefore, the safety of the power storage device 10 is further improved.
  • the second outer plate portion 335 of the outer plate material 330 is arranged outside the second intermediate plate portion 325, and as shown in FIG. 8, the second outer plate portion 335 is arranged.
  • the width of the intermediate plate portion 325 in the Y-axis direction is smaller than the width of the second outer plate portion 335 in the Y-axis direction. Therefore, when the X-axis direction is defined as the "first direction", each of the plurality of power storage elements 210 has the short side surface 212 directed to the first direction (X-axis direction), and the two power storage elements 210 adjacent to each other. It is explained that the long side surfaces 211 of the above are arranged side by side in an opposite posture.
  • the power storage device 10 includes an end member 300 having a portion arranged sideways in the first direction (X-axis direction) of the power storage element unit 200.
  • the end member 300 includes an intermediate plate material 320 (second intermediate plate portion 325) and an outer plate material 330 (second outer plate portion 335) arranged so as to be overlapped in the X-axis direction.
  • the second intermediate plate portion 325 comes into contact with the side surface of the power storage element unit 200 on the X-axis direction side (in this example, the unit side surface 202).
  • the second intermediate plate portion 325 is arranged between the power storage element unit 200 and the second outer plate portion 335, and is the second in the second direction (in the case of this example, the Y-axis direction) intersecting the X-axis direction.
  • the width of the second intermediate plate portion 325 is smaller than the width of the unit side surface 202 of the power storage element unit 200.
  • the width of the second outer plate portion 335 in the Y-axis direction is larger than the width of the second intermediate plate portion 325 in the Y-axis direction.
  • the end member 300 is arranged outside the short side surface 212 of the plurality of power storage elements 210.
  • the current collector is arranged near the short side surface 212 inside the power storage element 210, or when the power storage device 10 is impacted by the short side surface 212 being protected by the end member 300.
  • the possibility that the current collector damages the electrode body is reduced.
  • the safety of the power storage device 10 is improved.
  • the end members 300 are arranged on both sides of the power storage element unit 200 in the Y-axis direction.
  • the second outer plate portion 335 of one of the two end members 300 has a connecting portion 336 connected to the second outer plate portion 335 of the other outer plate material 330 of the two end members 300.
  • the pair of end members 300 protects both unit end faces 201 in the Y-axis direction of the power storage element unit 200 and the unit side surface 202 connecting these unit end faces 201.
  • the pair of end members 300 are mechanically connected by connecting the two second outer plate portions 335. Therefore, one end member 300 functions as a member for reinforcing the other end member 300. Therefore, the safety of the power storage device 10 is further improved.
  • the end member 300 may be arranged so that the inner plate material 310 is in contact with the unit side surface 202. That is, when the posture of the end member 300 is the same as the posture shown in FIG. 4, each of the plurality of power storage elements 210 has the short side surface 212 directed in the first direction (Y-axis direction) and is adjacent to each other.
  • the long side surfaces 211 of the two power storage elements 210 may be arranged side by side in opposite positions.
  • the unit side surface 202 is an example of the first side surface
  • the unit end surface 201 is an example of the second side surface.
  • the end member 300 can obtain the strength required for the protection of the power storage element unit 200 by stacking a plurality of plate materials.
  • the end member 300 is formed with a space that facilitates inward deformation of the plate materials (intermediate plate material 320 and outer plate material 330) outside the inner plate material 310.
  • the number of plate materials constituting the end member 300 is not limited to 3.
  • the end member 300 may be formed by stacking at least two plate members.
  • the end member 300 may be composed of the inner plate material 310 and the intermediate plate material 320.
  • the intermediate plate material 320 is an "outer plate material" when viewed from the inner plate material 310.
  • the end member 300 may be composed of the inner plate material 310 and the outer plate material 330 joined to the inner plate material 310.
  • the end member 300 may be composed of the intermediate plate material 320 and the outer plate material 330.
  • the intermediate plate material 320 is an "inner plate material" when viewed from the outer plate material 330.
  • the end member 300 can obtain the strength required for the protection of the power storage element unit 200 by stacking a plurality of plate materials, and the end member 300 is deformed to the inside of the outer plate material. A space can be formed to facilitate.
  • the intermediate plate material 320 may be a flat plate material having no second intermediate plate portion 325.
  • the outer plate material 330 may be a flat plate material having no second outer plate portion 335.
  • a connecting member for connecting the pair of end members 300 such as the connecting plate 380, is arranged, the power storage element unit 200 can be restrained and protected by the pair of end members 300.
  • the bolt 60 and the nut 62 are used to connect the pair of end members 300, but the method of connecting the pair of end members 300 is not limited.
  • the pair of end members 300 may be connected by caulking or welding a part of the pair of end members 300 to each other.
  • the material of the component of the power storage device 10 is not limited to the material described in the embodiment.
  • Each of the housing 100 and the end member 300 does not have to be made of metal.
  • the housing 100 and the end member 300 may be formed of a non-metal such as fiber reinforced plastic.
  • the materials of the plurality of plate materials constituting the end member 300 may be different. Each material of the plurality of plate materials may be determined based on the strength, rigidity, manufacturing cost, etc. required for the end member 300.
  • the present invention can be applied to a power storage device provided with a power storage element such as a lithium ion secondary battery.
  • Power storage device 200 Power storage element unit 201 Unit end face 202 Unit side surface 210 Power storage element 211 Long side surface 212 Short side surface 300 End member 310 Inner plate material 320 Intermediate plate material 321 First intermediate plate part 325 Second intermediate plate part 330 Outer plate material 331 First outer Plate part 335 Second outer plate part 336 Connecting part 500 Other members

Abstract

A power storage device (10) comprises a power storage element unit (200) including a plurality of power storage elements (210), and an end member (300) having a portion disposed laterally of the power storage element unit (200) in the Y-axis direction. The end member (300) includes an inner plate material (310) and an outer plate material (330) overlapping each other in the Y-axis direction. The inner plate material (310) abuts on a unit end surface (201) of the power storage element unit (200) which is a side surface on the Y-axis direction side. The inner plate material (310) is disposed between the power storage element unit (200) and the outer plate material (330). In the X-axis direction intersecting the Y-axis direction, the width of the inner plate material (310) is smaller than the width of the unit end surface (201). The width of the outer plate material (330) in the X-axis direction is greater than the width of the inner plate material (310) in the X-axis direction.

Description

蓄電装置Power storage device
 本発明は、複数の蓄電素子を備える蓄電装置に関する。 The present invention relates to a power storage device including a plurality of power storage elements.
 特許文献1には、蓄電池群を有する蓄電装置が開示されている。この蓄電装置では、蓄電池群の積層方向両端に、断熱機能及び絶縁機能を有するインシュレータプレートを介装して長方形状のエンドプレートが配置される。エンドプレート同士は、当該積層方向に延在する一対の連結バンドにより連結される。 Patent Document 1 discloses a power storage device having a storage battery group. In this power storage device, rectangular end plates are arranged at both ends of the storage battery group in the stacking direction with an insulator plate having a heat insulating function and an insulating function interposed therebetween. The end plates are connected to each other by a pair of connecting bands extending in the stacking direction.
特開2001-236937号公報Japanese Unexamined Patent Publication No. 2001-236937
 複数の蓄電素子からなる蓄電素子列における各蓄電素子の膨れの抑制は、各蓄電素子の容器の不具合、または、蓄電素子列を収容する外装体の不具合等を招き得る。そのため、蓄電素子列における各蓄電素子の膨れの抑制は、蓄電装置の安全性の向上の観点から重要である。この課題に対して、上記従来の蓄電装置のように、一対のエンドプレートで連結バンドによって蓄電素子列を拘束することで、各蓄電素子の膨れを抑制することは可能である。 Suppression of swelling of each power storage element in a power storage element row composed of a plurality of power storage elements may lead to a malfunction of the container of each power storage element, a malfunction of the exterior body accommodating the power storage element row, or the like. Therefore, suppressing the swelling of each power storage element in the power storage element row is important from the viewpoint of improving the safety of the power storage device. To solve this problem, it is possible to suppress the swelling of each power storage element by restraining the power storage element row with a connecting band with a pair of end plates as in the conventional power storage device.
 しかしながら、特許文献1の蓄電装置では、蓄電素子列の端面(インシュレータプレートの外側面)よりも大きなサイズのエンドプレートが、当該端面に当接する。そのため、仮に蓄電装置に、蓄電素子の並び方向の大きな外力が作用した場合、エンドプレートが当該端面の全域を押圧することになり、当該端面の角部が損傷するおそれがある。このような事象を防止するためには、エンドプレートを厚くすることでエンドプレートの変形を抑制することが考えられる。しかし、この対策は、蓄電装置のサイズまたは重量の増加を招くため、好ましい対策とは言えない。 However, in the power storage device of Patent Document 1, an end plate having a size larger than the end face (outer surface of the insulator plate) of the power storage element row comes into contact with the end face. Therefore, if a large external force is applied to the power storage device in the arrangement direction of the power storage elements, the end plate presses the entire area of the end face, and the corner portion of the end face may be damaged. In order to prevent such an event, it is conceivable to suppress the deformation of the end plate by making the end plate thicker. However, this measure is not a preferable measure because it causes an increase in the size or weight of the power storage device.
 本発明は、複数の蓄電素子を備える蓄電装置であって、安全性が向上された蓄電装置を提供することを目的とする。 An object of the present invention is to provide a power storage device provided with a plurality of power storage elements and having improved safety.
 本発明の一態様に係る蓄電装置は、複数の蓄電素子を有する蓄電素子ユニットと、前記蓄電素子ユニットの第一方向の側方に配置される部分を有するエンド部材とを備え、前記エンド部材は、前記第一方向に重ねて配置された、内板材及び外板材を含み、前記内板材は、前記蓄電素子ユニットの前記第一方向側の側面である第一側面に当接し、かつ、前記蓄電素子ユニットと前記外板材との間に配置されており、前記第一方向と交差する第二方向において、前記内板材の幅は、前記蓄電素子ユニットの前記第一側面の幅よりも小さく、前記外板材の前記第二方向の幅は、前記内板材の前記第二方向の幅よりも大きい。 The power storage device according to one aspect of the present invention includes a power storage element unit having a plurality of power storage elements and an end member having a portion arranged laterally in the first direction of the power storage element unit. The inner plate material and the outer plate material are arranged so as to be stacked in the first direction, and the inner plate material abuts on the first side surface, which is the side surface on the first direction side of the power storage element unit, and the power storage The width of the inner plate material is smaller than the width of the first side surface of the power storage element unit in the second direction intersecting the first direction, which is arranged between the element unit and the outer plate material. The width of the outer plate material in the second direction is larger than the width of the inner plate material in the second direction.
 本発明によれば、複数の蓄電素子を備える蓄電装置であって、安全性が向上された蓄電装置を提供できる。 According to the present invention, it is possible to provide a power storage device including a plurality of power storage elements and with improved safety.
図1は、実施の形態に係る蓄電装置の外観を示す斜視図である。FIG. 1 is a perspective view showing the appearance of the power storage device according to the embodiment. 図2は、実施の形態に係る蓄電装置の内部構成を示す分解斜視図である。FIG. 2 is an exploded perspective view showing an internal configuration of the power storage device according to the embodiment. 図3は、実施の形態に係る蓄電装置の詳細な内部構成を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a detailed internal configuration of the power storage device according to the embodiment. 図4は、実施の形態に係るエンド部材を蓄電素子ユニットから離して図示する斜視図である。FIG. 4 is a perspective view showing the end member according to the embodiment separated from the power storage element unit. 図5は、実施の形態に係るエンド部材及び蓄電素子ユニットのそれぞれを分解して示す分解斜視図である。FIG. 5 is an exploded perspective view showing each of the end member and the power storage element unit according to the embodiment in an exploded manner. 図6は、実施の形態に係るエンド部材の構成要素及びユニット端面の横幅の大小関係を示す斜視図である。FIG. 6 is a perspective view showing a magnitude relationship between the components of the end member and the width of the end face of the unit according to the embodiment. 図7は、実施の形態に係るエンド部材の構成要素及びユニット端面の縦幅の大小関係を示す正面図である。FIG. 7 is a front view showing the magnitude relationship between the components of the end member and the vertical width of the end face of the unit according to the embodiment. 図8は、実施の形態に係るエンド部材の斜視図である。FIG. 8 is a perspective view of the end member according to the embodiment.
 本発明の一態様に係る蓄電装置は、複数の蓄電素子を有する蓄電素子ユニットと、前記蓄電素子ユニットの第一方向の側方に配置される部分を有するエンド部材とを備え、前記エンド部材は、前記第一方向に重ねて配置された、内板材及び外板材を含み、前記内板材は、前記蓄電素子ユニットの前記第一方向側の側面である第一側面に当接し、かつ、前記蓄電素子ユニットと前記外板材との間に配置されており、前記第一方向と交差する第二方向において、前記内板材の幅は、前記蓄電素子ユニットの前記第一側面の幅よりも小さく、前記外板材の前記第二方向の幅は、前記内板材の前記第二方向の幅よりも大きい。 The power storage device according to one aspect of the present invention includes a power storage element unit having a plurality of power storage elements and an end member having a portion arranged laterally in the first direction of the power storage element unit. The inner plate material and the outer plate material are arranged so as to be stacked in the first direction, and the inner plate material abuts on the first side surface, which is the side surface on the first direction side of the power storage element unit, and the power storage The width of the inner plate material is smaller than the width of the first side surface of the power storage element unit in the second direction intersecting the first direction, which is arranged between the element unit and the outer plate material. The width of the outer plate material in the second direction is larger than the width of the inner plate material in the second direction.
 本態様の蓄電装置によれば、エンド部材により少なくとも蓄電素子ユニットの第一側面側が保護される。エンド部材は、少なくとも2つの板材が重ねられる部分を有することで、保護に必要な強度を得ることができる。さらに、内板材の幅が蓄電素子ユニットの第一側面の幅よりも小さく、かつ、外板材の幅が内板材の幅よりも大きいため、外板材の内側への変形を容易にさせる空間が存在する。そのため、外板材に、蓄電素子ユニット向きの大きな外力が作用した場合、外板材が変形することにより外力を吸収できる。これにより、蓄電素子ユニットが損傷する可能性が低減される。つまり、本態様に係るエンド部材は、複数の板材が重ねられることで所定の強度を有し、かつ、外板材の幅が内板材の幅よりも大きいことで、衝撃吸収が可能な変形能も有している。従って、本態様に係る蓄電装置は、安全性が向上された蓄電装置である。 According to the power storage device of this embodiment, at least the first side surface side of the power storage element unit is protected by the end member. The end member has a portion where at least two plate members are overlapped with each other, so that the strength required for protection can be obtained. Further, since the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit and the width of the outer plate material is larger than the width of the inner plate material, there is a space that facilitates the inward deformation of the outer plate material. To do. Therefore, when a large external force suitable for the power storage element unit acts on the outer plate material, the outer plate material is deformed and the external force can be absorbed. This reduces the possibility of damage to the power storage element unit. That is, the end member according to this embodiment has a predetermined strength by stacking a plurality of plate materials, and the width of the outer plate material is larger than the width of the inner plate material, so that the end member has a deformability capable of absorbing impact. Have. Therefore, the power storage device according to this aspect is a power storage device with improved safety.
 前記第一方向及び前記第二方向と交差する第三方向において、前記内板材の幅は、前記蓄電素子ユニットの前記第一側面の幅よりも小さく、前記内板材は、前記第一方向から見た場合に、前記第一側面の外形の領域内に配置されてもよい。 In the first direction and the third direction intersecting the second direction, the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit, and the inner plate material is viewed from the first direction. In that case, it may be arranged in the outer shape region of the first side surface.
 この構成によれば、内板材は、第一方向から見た場合に、蓄電素子ユニットの第一側面の外形よりも小さいサイズに形成され、かつ、第一側面の外形の領域内に配置される。従って、外板材の内側への変形が容易な空間が増えるため、外板材による外力の吸収効果が向上され、その結果、蓄電装置の安全性が向上する。 According to this configuration, the inner plate material is formed in a size smaller than the outer shape of the first side surface of the power storage element unit when viewed from the first direction, and is arranged in the outer shape region of the first side surface. .. Therefore, since the space in which the outer plate material can be easily deformed increases, the effect of absorbing the external force by the outer plate material is improved, and as a result, the safety of the power storage device is improved.
 前記複数の蓄電素子のそれぞれは、長側面を前記第一方向に向けた姿勢で、前記第一方向に並んで配置されてもよい。 Each of the plurality of power storage elements may be arranged side by side in the first direction with the long side surface facing the first direction.
 この構成によれば、第一方向の端部に位置する蓄電素子の長側面の外側にエンド部材が配置される。これにより、蓄電素子の変形しやすい部分である長側面が保護され、長側面の膨張が効率よく抑制される。その結果、蓄電装置の安全性が向上する。 According to this configuration, the end member is arranged on the outside of the long side surface of the power storage element located at the end in the first direction. As a result, the long side surface, which is a easily deformable portion of the power storage element, is protected, and the expansion of the long side surface is efficiently suppressed. As a result, the safety of the power storage device is improved.
 前記複数の蓄電素子のそれぞれは、短側面を前記第一方向に向け、かつ、互いに隣り合う2つの蓄電素子の長側面が対向する姿勢で並んで配置されてもよい。 Each of the plurality of power storage elements may be arranged side by side with the short side surface facing the first direction and the long side surfaces of the two power storage elements adjacent to each other facing each other.
 この構成によれば、複数の蓄電素子の短側面の外側にエンド部材が配置される。これにより、蓄電素子の内部において短側面の近くに集電体が配置されている場合、短側面がエンド部材に保護されていることで、蓄電装置に衝撃が与えられた場合において、集電体が電極体を損傷する可能性が低減される。その結果、蓄電装置の安全性が向上する。 According to this configuration, the end member is arranged on the outside of the short side surface of the plurality of power storage elements. As a result, when the current collector is arranged near the short side surface inside the power storage element, the short side surface is protected by the end member, so that the current collector is impacted when the power storage device is impacted. Reduces the possibility of damaging the electrode body. As a result, the safety of the power storage device is improved.
 前記エンド部材はさらに、前記内板材と前記外板材との間に配置された中間板材を有し、前記中間板材は、前記内板材に対向する第一中間板部と、前記蓄電素子ユニットの前記第一側面に隣接する第二側面に対向する第二中間板部とを有し、前記外板材は、前記中間板材の前記第一中間板部に対向する第一外板部と、前記中間板材の前記第二中間板部に対向する第二外板部とを有してもよい。 The end member further has an intermediate plate material arranged between the inner plate material and the outer plate material, and the intermediate plate material includes a first intermediate plate portion facing the inner plate material and the power storage element unit. It has a second intermediate plate portion facing the second side surface adjacent to the first side surface, and the outer plate material includes a first outer plate portion facing the first intermediate plate portion of the intermediate plate material and the intermediate plate material. It may have a second outer plate portion facing the second intermediate plate portion of the above.
 この構成によれば、エンド部材により、蓄電素子ユニットの第一側面及び第二側面の両方が保護される。そのため、蓄電装置の安全性がより向上される。 According to this configuration, both the first side surface and the second side surface of the power storage element unit are protected by the end member. Therefore, the safety of the power storage device is further improved.
 前記エンド部材は、前記蓄電素子ユニットの前記第一方向における両側のそれぞれに配置されており、2つの前記エンド部材のうちの一方の前記外板材の前記第二外板部は、2つの前記エンド部材のうちの他方の前記外板材の前記第二外板部と連結される連結部を有してもよい。 The end members are arranged on both sides of the power storage element unit in the first direction, and the second outer plate portion of the outer plate material of one of the two end members is the two ends. It may have a connecting portion connected to the second outer plate portion of the other outer plate material of the member.
 この構成によれば、一対のエンド部材により、蓄電素子ユニットの第一方向の両方の第一側面、及び、これら第一側面を接続する第二側面が保護される。
一対のエンド部材は、2つの第二外板部が連結されることで、互いに機械的に接続される。そのため、一方のエンド部材が他方のエンド部材を補強する部材として機能する。従って、蓄電装置の安全性がより向上される。
According to this configuration, the pair of end members protect both first side surfaces of the power storage element unit in the first direction and the second side surface connecting these first side surfaces.
The pair of end members are mechanically connected to each other by connecting the two second outer plate portions. Therefore, one end member functions as a member for reinforcing the other end member. Therefore, the safety of the power storage device is further improved.
 本発明は、複数の蓄電素子を含む蓄電素子ユニットに対して配置されるエンド部材として実現することもできる。 The present invention can also be realized as an end member arranged for a power storage element unit including a plurality of power storage elements.
 以下、図面を参照しながら、本発明の実施の形態に係る蓄電装置について説明する。以下で説明する実施の形態は、包括的または具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置及び接続形態、製造工程、製造工程の順序などは、一例であり、本発明を限定する主旨ではない。以下の実施の形態における構成要素のうち、最上位概念を示す独立請求項に記載されていない構成要素については、任意の構成要素として説明される。各図において、寸法等は厳密に図示したものではない。 Hereinafter, the power storage device according to the embodiment of the present invention will be described with reference to the drawings. The embodiments described below provide comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, manufacturing processes, order of manufacturing processes, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Among the components in the following embodiments, the components not described in the independent claims indicating the top-level concept are described as arbitrary components. In each figure, the dimensions and the like are not exactly illustrated.
 以下の説明及び図面中において、筐体の長手方向(筐体の短側面の対向方向)、または、1つの蓄電素子における短側面の対向方向をX軸方向と定義する。筐体の短手方向(筐体の長側面の対向方向)、または、1つの蓄電素子における長側面の対向方向をY軸方向と定義する。筐体における本体部と固定壁部との並び方向、または、蓄電素子の短側面の長手方向をZ軸方向と定義する。これらX軸方向、Y軸方向及びZ軸方向は、互いに交差(本実施の形態では直交)する方向である。本実施の形態では、Z軸方向を上下方向とし、かつ、Z軸方向プラス側を「上」として説明を行うが、このことは、実際の蓄電装置の使用時における姿勢を限定しない。各図面については、本発明を示すために、適宜強調、省略、または比率の調整を行うことで、実際の形状、位置関係、及び比率とは異なる場合がある。 In the following description and drawings, the longitudinal direction of the housing (opposite direction of the short side surface of the housing) or the facing direction of the short side surface of one power storage element is defined as the X-axis direction. The lateral direction of the housing (opposite direction of the long side surface of the housing) or the facing direction of the long side surface of one power storage element is defined as the Y-axis direction. The alignment direction of the main body portion and the fixed wall portion in the housing, or the longitudinal direction of the short side surface of the power storage element is defined as the Z-axis direction. These X-axis directions, Y-axis directions, and Z-axis directions intersect each other (orthogonally in the present embodiment). In the present embodiment, the Z-axis direction is the vertical direction and the Z-axis direction plus side is the “upper”, but this does not limit the posture when the actual power storage device is used. Each drawing may differ from the actual shape, positional relationship, and ratio by appropriately emphasizing, omitting, or adjusting the ratio in order to show the present invention.
 X軸方向プラス側とは、X軸の矢印方向側を示し、X軸方向マイナス側とは、X軸方向プラス側とは反対側を示す。Y軸方向及びZ軸方向についても同様である。さらに、平行及び直交などの、相対的な方向または姿勢を示す表現は、厳密には、その方向または姿勢ではない場合も含む。2つの方向が直交している、とは、当該2つの方向が完全に直交していることを意味するだけでなく、実質的に直交していること、すなわち、数%程度の差異を含むことも意味する。 The plus side in the X-axis direction indicates the arrow direction side of the X-axis, and the minus side in the X-axis direction indicates the side opposite to the plus side in the X-axis direction. The same applies to the Y-axis direction and the Z-axis direction. Further, expressions indicating relative directions or postures such as parallel and orthogonal include cases where they are not strictly the directions or postures. The fact that the two directions are orthogonal not only means that the two directions are completely orthogonal, but also that they are substantially orthogonal, that is, that they include a difference of about several percent. Also means.
 (実施の形態)
 [1.蓄電装置の全般的な説明]
 まず、図1~図3を用いて、実施の形態に係る蓄電装置10の全般的な説明を行う。図1は、実施の形態に係る蓄電装置10の外観を示す斜視図である。図2は、実施の形態に係る蓄電装置10の内部構成を示す分解斜視図である。図3は、実施の形態に係る蓄電装置10の詳細な内部構成を示す分解斜視図である。図2及び図3では、蓄電装置10と外部機器とを接続する電力ケーブル20及び電線30の図示は省略されている。
(Embodiment)
[1. General description of power storage device]
First, with reference to FIGS. 1 to 3, a general description of the power storage device 10 according to the embodiment will be given. FIG. 1 is a perspective view showing the appearance of the power storage device 10 according to the embodiment. FIG. 2 is an exploded perspective view showing the internal configuration of the power storage device 10 according to the embodiment. FIG. 3 is an exploded perspective view showing a detailed internal configuration of the power storage device 10 according to the embodiment. In FIGS. 2 and 3, the power cable 20 and the electric wire 30 for connecting the power storage device 10 and the external device are not shown.
 蓄電装置10は、外部からの電気を充電し、また外部へ電気を放電できる装置である。蓄電装置10は、電力貯蔵用途または電源用途等に使用される電池モジュールである。具体的には、蓄電装置10は、電気自動車(EV)、ハイブリッド電気自動車(HEV)またはプラグインハイブリッド電気自動車(PHEV)等の自動車、自動二輪車、ウォータークラフト、スノーモービル、農業機械、建設機械等の移動体の駆動用、エンジン始動用若しくはバックアップ用、または、家庭用若しくは発電機用に使用される定置用として用いられる。 The power storage device 10 is a device capable of charging electricity from the outside and discharging electricity to the outside. The power storage device 10 is a battery module used for power storage, power supply, and the like. Specifically, the power storage device 10 includes automobiles such as electric vehicles (EV), hybrid electric vehicles (HEV) or plug-in hybrid electric vehicles (PHEV), motorcycles, watercraft, snowmobiles, agricultural machinery, construction machinery and the like. It is used for driving a moving body, starting an engine or backing up, or for stationary use for home use or a generator.
 図1~図3に示すように、蓄電装置10は、複数の蓄電素子210を有する蓄電素子ユニット200と、蓄電素子ユニット200を収容する筐体100とを備える。本実施の形態では、蓄電素子ユニット200は4個の蓄電素子210を有している。蓄電素子ユニット200が有する蓄電素子210の数は4には限定されない。蓄電素子ユニット200は複数の蓄電素子210を備えていればよい。 As shown in FIGS. 1 to 3, the power storage device 10 includes a power storage element unit 200 having a plurality of power storage elements 210, and a housing 100 for accommodating the power storage element units 200. In the present embodiment, the power storage element unit 200 has four power storage elements 210. The number of power storage elements 210 included in the power storage element unit 200 is not limited to four. The power storage element unit 200 may include a plurality of power storage elements 210.
 筐体100は、蓄電装置10を他の部材500に固定するための固定部145が設けられた固定壁部140と、固定壁部140との間に蓄電素子ユニット200等を収容する空間を形成する箱型の本体部105とを有する。図3に示すように、固定壁部140には、蓄電素子ユニット200の固定のためのねじ穴146が複数設けられている。後述するエンド部材300を貫通する複数のボルト50のそれぞれが、ねじ穴146に螺合することで、エンド部材300及び蓄電素子ユニット200が固定壁部140の上面に固定される。さらに、エンド部材300及び蓄電素子ユニット200を囲むように本体部105が配置される。 The housing 100 forms a space for accommodating the power storage element unit 200 and the like between the fixed wall portion 140 provided with the fixing portion 145 for fixing the power storage device 10 to the other member 500 and the fixed wall portion 140. It has a box-shaped main body 105 and the like. As shown in FIG. 3, the fixed wall portion 140 is provided with a plurality of screw holes 146 for fixing the power storage element unit 200. The end member 300 and the power storage element unit 200 are fixed to the upper surface of the fixed wall portion 140 by screwing each of the plurality of bolts 50 penetrating the end member 300, which will be described later, into the screw holes 146. Further, the main body 105 is arranged so as to surround the end member 300 and the power storage element unit 200.
 つまり、全体として平板状の固定壁部140の上面に蓄電素子ユニット200等の各要素が配置されており、これら、蓄電素子ユニット200等を上方及び側方から覆うように本体部105が配置される。固定壁部140の固定部145には固定用開口部145aが設けられており、本体部105の端部には、固定用開口部106が設けられている。固定用開口部106及び固定用開口部145aに挿通されたボルト40が、他の部材500のねじ穴(またはナット)に螺合する。つまり、本体部105と固定壁部140とは、ボルト40によって他の部材500に共締めされる。本実施の形態では、このような、筐体100の固定箇所が4つ設けられており、これら4つの固定箇所によって、他の部材500に蓄電装置10が固定される。 That is, each element such as the power storage element unit 200 is arranged on the upper surface of the flat plate-shaped fixed wall portion 140 as a whole, and the main body portion 105 is arranged so as to cover these power storage element units 200 and the like from above and from the side. To. The fixing portion 145 of the fixing wall portion 140 is provided with a fixing opening 145a, and the fixing opening 106 is provided at the end of the main body portion 105. The bolt 40 inserted through the fixing opening 106 and the fixing opening 145a is screwed into the screw hole (or nut) of the other member 500. That is, the main body portion 105 and the fixed wall portion 140 are fastened together with the other member 500 by the bolt 40. In the present embodiment, four such fixing points of the housing 100 are provided, and the power storage device 10 is fixed to the other member 500 by these four fixing points.
 図1に示すように、本体部105の一つの壁部(X軸方向プラス側の壁部)には、排気管190及び排気管190よりも上方に配置された外部接続部195が設けられている。排気管190は、筐体100内の1以上の蓄電素子210のガス排出弁からガスが排出された場合、そのガスを筐体100の外部に導くための部材である。外部接続部195は、蓄電素子ユニット200の正極及び負極に接続された一対の電力ケーブル20と、後述するBMU(Battery Management Unit)400に接続された複数の電線30とを保持する部材である。図1では、一対の電力ケーブル20及び複数の電線30は外部接続部195から外部に延設されているが、一対の電力ケーブル20及び複数の電線30のそれぞれは、外部接続部195の位置に、外部機器と接続するためのコネクタを有してもよい。 As shown in FIG. 1, one wall portion (wall portion on the plus side in the X-axis direction) of the main body portion 105 is provided with an exhaust pipe 190 and an external connection portion 195 arranged above the exhaust pipe 190. There is. The exhaust pipe 190 is a member for guiding the gas to the outside of the housing 100 when the gas is discharged from the gas discharge valves of one or more power storage elements 210 in the housing 100. The external connection unit 195 is a member that holds a pair of power cables 20 connected to the positive electrode and the negative electrode of the power storage element unit 200, and a plurality of electric wires 30 connected to a BMU (Battery Management Unit) 400 described later. In FIG. 1, the pair of power cables 20 and the plurality of electric wires 30 extend to the outside from the external connection portion 195, but each of the pair of power cables 20 and the plurality of electric wires 30 is located at the position of the external connection portion 195. , May have a connector for connecting to an external device.
 筐体100は、鉄等の金属で形成されており、かつ、箱型の本体部105を有しているため、蓄電装置10は、比較的に小型でかつ外殻(つまり筐体100)の強度が高いという特性を有している。そのため、蓄電装置10は、自動車に搭載された電気機器の動作のためのバッテリー、または、当該動作を保証するバックアップ用のバッテリーとして自動車に搭載される。従って、蓄電装置10が固定される他の部材500としては、自動車の車体が例示される。図1及び図2では、他の部材500は、簡易的に矩形の板状部材として表しているが、他の部材500は、蓄電装置10を固定できる部分を有していれば、サイズ及び形状に特に限定はない。 Since the housing 100 is made of a metal such as iron and has a box-shaped main body 105, the power storage device 10 is relatively small and has an outer shell (that is, the housing 100). It has the characteristic of high strength. Therefore, the power storage device 10 is mounted on the automobile as a battery for operating the electric device mounted on the automobile or as a backup battery for guaranteeing the operation. Therefore, as another member 500 to which the power storage device 10 is fixed, an automobile body is exemplified. In FIGS. 1 and 2, the other member 500 is simply represented as a rectangular plate-shaped member, but the other member 500 has a size and shape as long as it has a portion to which the power storage device 10 can be fixed. Is not particularly limited.
 筐体100は、固定壁部140以外の複数の壁部のうちの1つである支持壁部110を有しており、支持壁部110は、被支持部材を取り付けるための取付部120を有している。取付部120には、被支持部材の側から見た場合に、支持壁部110よりも大きな被支持部材を取り付けることができる。取付部120は、被支持部材を取り付けるためのボルト等と螺合する取付穴120aを有している。蓄電装置10が自動車に搭載される場合、蓄電装置10は比較的に小型であることから、運転席と助手席との間に配置できる。この場合、本実施の形態において支持壁部110に4つ配置された取付部120に、ドリンクホルダ等を含むコンソールボックスを取り付けることができる。つまり、蓄電装置10を、コンソールボックスを支持する支持部材として機能させることができる。 The housing 100 has a support wall portion 110 which is one of a plurality of wall portions other than the fixed wall portion 140, and the support wall portion 110 has an attachment portion 120 for attaching a supported member. are doing. A supported member larger than the support wall portion 110 can be attached to the mounting portion 120 when viewed from the side of the supported member. The mounting portion 120 has a mounting hole 120a that is screwed with a bolt or the like for mounting the supported member. When the power storage device 10 is mounted on an automobile, the power storage device 10 can be arranged between the driver's seat and the passenger's seat because the power storage device 10 is relatively small. In this case, the console box including the drink holder and the like can be attached to the four attachment portions 120 arranged on the support wall portion 110 in the present embodiment. That is, the power storage device 10 can function as a support member for supporting the console box.
 本実施の形態では、筐体100の内部にはさらに、蓄電素子ユニット200の充放電を制御するBMU(Battery Management Unit)400が収容されている。BMU400は、複数のボルトで固定壁部140の上面に固定される。蓄電装置10がBMU400を内蔵することは必須ではなく、蓄電素子ユニット200の充放電の制御は外部の機器によって行われてもよい。 In the present embodiment, a BMU (Battery Management Unit) 400 that controls charging / discharging of the power storage element unit 200 is further housed inside the housing 100. The BMU 400 is fixed to the upper surface of the fixing wall portion 140 with a plurality of bolts. It is not essential that the power storage device 10 incorporates the BMU 400, and the charge / discharge control of the power storage element unit 200 may be performed by an external device.
 蓄電素子ユニット200は、図2及び図3に示すように、蓄電素子210の並び方向(Y軸方向)で対向するエンド部材300に挟まれた状態で保持されている。蓄電素子ユニット200の電極端子の側(Z軸方向プラス側)には、複数の蓄電素子210を電気的及び機械的に接続する複数のバスバー250と、複数のバスバー250を保持するバスバーフレーム255とが配置される。バスバーフレーム255には、バスバー用開口部256が複数設けられており、複数のバスバー250のそれぞれは、複数のバスバー用開口部256のいずれかに配置され、その下方の1つまたは2つの蓄電素子210に接合される。 As shown in FIGS. 2 and 3, the power storage element unit 200 is held in a state of being sandwiched between end members 300 facing each other in the arrangement direction (Y-axis direction) of the power storage elements 210. On the electrode terminal side (plus side in the Z-axis direction) of the power storage element unit 200, a plurality of bus bars 250 for electrically and mechanically connecting a plurality of power storage elements 210, and a bus bar frame 255 for holding the plurality of bus bars 250. Is placed. The bus bar frame 255 is provided with a plurality of bus bar openings 256, each of the plurality of bus bars 250 being arranged in any of the plurality of bus bar openings 256, and one or two power storage elements below the bus bar frame 255. Joined to 210.
 本実施の形態では、蓄電素子ユニット200の上方にはさらにカバー部材280が配置されており、蓄電素子ユニット200とカバー部材280との間にバスバー250が配置されている。つまり、蓄電素子ユニット200とカバー部材280との間にバスバーフレーム255が配置されている。 In the present embodiment, the cover member 280 is further arranged above the power storage element unit 200, and the bus bar 250 is arranged between the power storage element unit 200 and the cover member 280. That is, the bus bar frame 255 is arranged between the power storage element unit 200 and the cover member 280.
 [2.蓄電素子ユニット及びその周辺の構成]
 次に、以上のように構成された蓄電装置10における、蓄電素子ユニット200及びその周辺の構成を、図4及び図5を用いて説明する。図4は、実施の形態に係るエンド部材300を蓄電素子ユニット200から離して図示する斜視図である。図5は、実施の形態に係るエンド部材300及び蓄電素子ユニット200のそれぞれを分解して示す分解斜視図である。
[2. Configuration of power storage element unit and its surroundings]
Next, the configuration of the power storage element unit 200 and its surroundings in the power storage device 10 configured as described above will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing the end member 300 according to the embodiment separated from the power storage element unit 200. FIG. 5 is an exploded perspective view showing each of the end member 300 and the power storage element unit 200 according to the embodiment in an exploded manner.
 図4に示すように、本実施の形態に係る蓄電装置10は、蓄電素子ユニット200のY軸方向の側方に配置される部分を有するエンド部材300を備えている。Y軸方向は第一方向の一例であり、本実施の形態では、蓄電素子ユニット200における複数の蓄電素子210の並び方向と一致する。図5に示すように複数の蓄電素子210は長側面211が、Y軸方向と直交する姿勢(言い換えると短側面212がY軸方向に平行な姿勢)でY軸方向に並べられている。 As shown in FIG. 4, the power storage device 10 according to the present embodiment includes an end member 300 having a portion of the power storage element unit 200 arranged laterally in the Y-axis direction. The Y-axis direction is an example of the first direction, and in the present embodiment, it coincides with the arrangement direction of the plurality of power storage elements 210 in the power storage element unit 200. As shown in FIG. 5, the long side surfaces 211 of the plurality of power storage elements 210 are arranged in the Y-axis direction in a posture orthogonal to the Y-axis direction (in other words, a posture in which the short side surfaces 212 are parallel to the Y-axis direction).
 蓄電素子ユニット200は、図5に示すように、複数の蓄電素子210と、隣り合う2つの蓄電素子210の間に配置されたスペーサ220と、複数の蓄電素子210の並び方向(Y軸方向)における両端に配置されたエンドスペーサ225とを有する。つまり、本実施の形態では、蓄電素子ユニット200のY軸方向の側面であるユニット端面201は、エンドスペーサ225の外側面により形成されている。ユニット端面201は、第一側面の一例である。本実施の形態では、ユニット端面201は単純な平面ではなく、図4に示すように、凹状または凸状の部分(凹凸部分)を有している。従って、「ユニット端面201に当接する」という場合、ユニット端面201の平坦な部分に当接することだけでなく、凹凸部分の表面に当接することも含む。 As shown in FIG. 5, the power storage element unit 200 includes a plurality of power storage elements 210, a spacer 220 arranged between two adjacent power storage elements 210, and an arrangement direction (Y-axis direction) of the plurality of power storage elements 210. It has end spacers 225 arranged at both ends of the above. That is, in the present embodiment, the unit end surface 201, which is the side surface of the power storage element unit 200 in the Y-axis direction, is formed by the outer surface of the end spacer 225. The unit end face 201 is an example of the first side surface. In the present embodiment, the unit end face 201 is not a simple flat surface, but has a concave or convex portion (concave and convex portion) as shown in FIG. Therefore, the term "contacting the unit end face 201" includes not only contacting the flat portion of the unit end face 201 but also contacting the surface of the uneven portion.
 エンド部材300は、ユニット端面201に当接して配置される。具体的には、エンド部材300は、ユニット端面201に当接する内板材310及びその外側に配置された板材で構成される。本実施では、内板材310の外側に中間板材320及び外板材330が配置される。中間板材320及び外板材330のそれぞれは、内板材310との関係において「外板材」の一例である。 The end member 300 is arranged in contact with the end face 201 of the unit. Specifically, the end member 300 is composed of an inner plate material 310 that abuts on the end surface 201 of the unit and a plate material arranged outside the inner plate material 310. In this implementation, the intermediate plate material 320 and the outer plate material 330 are arranged outside the inner plate material 310. Each of the intermediate plate material 320 and the outer plate material 330 is an example of the "outer plate material" in relation to the inner plate material 310.
 内板材310、中間板材320及び外板材330のそれぞれは、鉄等の金属の板材に対し、プレス加工等を行うことで作製される。さらに、エンド部材300は、これらの板材を溶接することで作製される。内板材310と中間板材320とは重ねられて溶接される。溶接により一体化された内板材310及び中間板材320のうちの中間板材320が、内板材310に設けられた複数の接合用開口部312(図5参照)を介して外板材330と溶接される。これにより、内板材310、中間板材320及び外板材330が積層された構造を有するエンド部材300が形成される。 Each of the inner plate material 310, the intermediate plate material 320, and the outer plate material 330 is produced by performing press working or the like on a metal plate material such as iron. Further, the end member 300 is manufactured by welding these plate materials. The inner plate material 310 and the intermediate plate material 320 are overlapped and welded. The intermediate plate material 320 of the inner plate material 310 and the intermediate plate material 320 integrated by welding is welded to the outer plate material 330 through a plurality of joining openings 312 (see FIG. 5) provided in the inner plate material 310. .. As a result, the end member 300 having a structure in which the inner plate material 310, the intermediate plate material 320, and the outer plate material 330 are laminated is formed.
 中間板材320は、図4及び図5に示すように、内板材310に対向する第一中間板部321と、ユニット側面202に対向する第二中間板部325とを有する。ユニット側面202は、ユニット端面201に隣接する側面である。本実施の形態において、ユニット側面202は、第二側面の一例であり、蓄電素子ユニット200のX軸方向の側面である。つまり、第一中間板部321と第二中間板部325とは互いに直交する姿勢で接続されている。第一中間板部321のX軸方向の両端に第二中間板部325が設けられている。このように構成された中間板材320は、エンド部材300の一部として、蓄電素子ユニット200のY軸方向の端部を三方向から囲む状態で蓄電素子ユニット200に対して配置される。 As shown in FIGS. 4 and 5, the intermediate plate member 320 has a first intermediate plate portion 321 facing the inner plate material 310 and a second intermediate plate portion 325 facing the unit side surface 202. The unit side surface 202 is a side surface adjacent to the unit end surface 201. In the present embodiment, the unit side surface 202 is an example of the second side surface, and is a side surface of the power storage element unit 200 in the X-axis direction. That is, the first intermediate plate portion 321 and the second intermediate plate portion 325 are connected in a posture orthogonal to each other. Second intermediate plate portions 325 are provided at both ends of the first intermediate plate portion 321 in the X-axis direction. The intermediate plate member 320 configured in this way is arranged with respect to the power storage element unit 200 in a state of surrounding the end portion of the power storage element unit 200 in the Y-axis direction from three directions as a part of the end member 300.
 外板材330は、図4及び図5に示すように、中間板材320の第一中間板部321に対向する第一外板部331と、中間板材320の第二中間板部325に対向する第二外板部335とを有する。つまり、第一外板部331と第二外板部335とは互いに直交する姿勢で接続されている。第一外板部331のX軸方向の両端に第二外板部335が設けられている。このように構成された外板材330は、エンド部材300の一部として、蓄電素子ユニット200のY軸方向の端部を三方向から囲む状態で蓄電素子ユニット200に対して配置される。 As shown in FIGS. 4 and 5, the outer plate material 330 has a first outer plate portion 331 facing the first intermediate plate portion 321 of the intermediate plate material 320 and a second intermediate plate portion 325 facing the second intermediate plate portion 325 of the intermediate plate material 320. (Ii) It has an outer plate portion 335. That is, the first outer plate portion 331 and the second outer plate portion 335 are connected in a posture orthogonal to each other. Second outer plate portions 335 are provided at both ends of the first outer plate portion 331 in the X-axis direction. The outer plate material 330 configured in this way is arranged with respect to the power storage element unit 200 in a state of surrounding the end portion of the power storage element unit 200 in the Y-axis direction from three directions as a part of the end member 300.
 中間板材320の第二中間板部325は、下端部の外側に開いた部分に貫通孔325aを有し、外板材330の第二外板部335は、下端部の外側に開いた部分に貫通孔335aを有する。中間板材320と外板材330とを組み合わせる際に、中間板材320の貫通孔325aの直上に外板材330の貫通孔335aが配置される。さらに、ボルト50が貫通孔335a及び貫通孔325aに挿し通されて、固定壁部140のねじ穴146に螺合する(図3参照)。これにより、エンド部材300及び蓄電素子ユニット200が固定壁部140に固定される。図4及び図5では表されていないが、エンド部材300は、X軸方向マイナス側にも貫通孔335a及び貫通孔325aが設けられており、1つのエンド部材300は、2つのボルト50で固定壁部140に固定される。 The second intermediate plate portion 325 of the intermediate plate material 320 has a through hole 325a in a portion opened to the outside of the lower end portion, and the second outer plate portion 335 of the outer plate material 330 penetrates into a portion opened to the outside of the lower end portion. It has a hole 335a. When the intermediate plate material 320 and the outer plate material 330 are combined, the through hole 335a of the outer plate material 330 is arranged directly above the through hole 325a of the intermediate plate material 320. Further, the bolt 50 is inserted into the through hole 335a and the through hole 325a and screwed into the screw hole 146 of the fixed wall portion 140 (see FIG. 3). As a result, the end member 300 and the power storage element unit 200 are fixed to the fixed wall portion 140. Although not shown in FIGS. 4 and 5, the end member 300 is also provided with a through hole 335a and a through hole 325a on the minus side in the X-axis direction, and one end member 300 is fixed by two bolts 50. It is fixed to the wall portion 140.
 本実施の形態では、上記構成を有するエンド部材300は、図4及び図5に示すように、蓄電素子ユニット200のY軸方向における両側のそれぞれに配置されている。これら一対のエンド部材300は、蓄電素子ユニット200の上方に配置される接続板380によって接続される。 In the present embodiment, the end members 300 having the above configuration are arranged on both sides of the power storage element unit 200 in the Y-axis direction, as shown in FIGS. 4 and 5. These pair of end members 300 are connected by a connection plate 380 arranged above the power storage element unit 200.
 具体的には、接続板380の2つの貫通孔に、エンド部材300に設けられた2つの軸部329を差し込んでナット90で締め付ける。この作業を一対のエンド部材300のそれぞれで行うことで、一対のエンド部材300が接続板380によって接続される。 Specifically, the two shaft portions 329 provided on the end member 300 are inserted into the two through holes of the connection plate 380 and tightened with the nut 90. By performing this work on each of the pair of end members 300, the pair of end members 300 are connected by the connecting plate 380.
 2つの軸部329は、中間板材320に固定されている。具体的には、中間板材320は、第一中間板部321の上端から蓄電素子ユニット200の上方に向けて突出する突出部328を有し、突出部328には上方に向けて立設された軸部329が設けられている。外板材330は、第一外板部331の上端から蓄電素子ユニット200の上方に向けて突出する突出部332を有し、突出部332には軸部329が貫通する貫通孔332aが設けられている。中間板材320と外板材330とを組み合わせる際に、中間板材320の2つの軸部329が、外板材330の2つの貫通孔332aに挿し通される。これにより、エンド部材300の上端に2つの軸部329が配置される。 The two shaft portions 329 are fixed to the intermediate plate material 320. Specifically, the intermediate plate material 320 has a protruding portion 328 that projects upward from the upper end of the first intermediate plate portion 321 of the power storage element unit 200, and is erected upward at the protruding portion 328. A shaft portion 329 is provided. The outer plate material 330 has a protruding portion 332 that protrudes upward from the power storage element unit 200 from the upper end of the first outer plate portion 331, and the protruding portion 332 is provided with a through hole 332a through which the shaft portion 329 penetrates. There is. When the intermediate plate material 320 and the outer plate material 330 are combined, the two shaft portions 329 of the intermediate plate material 320 are inserted into the two through holes 332a of the outer plate material 330. As a result, two shaft portions 329 are arranged at the upper end of the end member 300.
 さらに、一対のエンド部材300は、それぞれの外板材330同士がボルト60及びナット62で締結される構造を有している。具体的には、エンド部材300において最も外側に位置する外板材330の第二外板部335に、接続相手のエンド部材300の第二外板部335と連結される連結部336が設けられている。本実施の形態では、連結部336は、第二外板部335の先端部が外側に曲げられることで形成されており、第一外板部331に平行な板状部分として第二外板部335に設けられている。連結部336には複数(本実施の形態では3つ)の貫通孔336aが形成されている。図5に示すように、2つのエンド部材300を組み合わせた場合、一方のエンド部材300の連結部336の貫通孔336aと、他方のエンド部材300の連結部336の貫通孔336aとがY軸方向で重ねられる。さらに、これら2つの貫通孔336aに挿し通されたボルト60にナット62が螺合する。このようなボルト60及びナット62による締結箇所が6つ設けられる。つまり、2つのエンド部材300のうちの一方のエンド部材300のX軸方向の両端部と、他方のエンド部材300のX軸方向の両端部とが6箇所で締結される。 Further, the pair of end members 300 have a structure in which the outer plate members 330 are fastened to each other with bolts 60 and nuts 62. Specifically, the second outer plate portion 335 of the outer plate material 330 located on the outermost side of the end member 300 is provided with a connecting portion 336 connected to the second outer plate portion 335 of the end member 300 of the connection partner. There is. In the present embodiment, the connecting portion 336 is formed by bending the tip portion of the second outer plate portion 335 outward, and the second outer plate portion is formed as a plate-like portion parallel to the first outer plate portion 331. It is provided at 335. A plurality of (three in this embodiment) through holes 336a are formed in the connecting portion 336. As shown in FIG. 5, when two end members 300 are combined, the through hole 336a of the connecting portion 336 of one end member 300 and the through hole 336a of the connecting portion 336 of the other end member 300 are in the Y-axis direction. Can be stacked with. Further, the nut 62 is screwed into the bolt 60 inserted through these two through holes 336a. Six such fastening points with bolts 60 and nuts 62 are provided. That is, both ends of one end member 300 of the two end members 300 in the X-axis direction and both ends of the other end member 300 in the X-axis direction are fastened at six points.
 すなわち、蓄電素子ユニット200を間に挟む2つのエンド部材300は、上方に配置された接続板380によって接続され、かつ、左右(X軸方向)の両端部が締結される。これにより、前後方向(Y軸方向)において2つのエンド部材300の一方は他方を強固に拘束できる。このように互いに接続された2つのエンド部材300は、固定壁部140に複数のボルト50によって締結される。つまり、2つのエンド部材300及びこれらに挟まれた蓄電素子ユニット200は、固定壁部140にしっかりと固定される。 That is, the two end members 300 sandwiching the power storage element unit 200 are connected by a connection plate 380 arranged above, and both left and right (X-axis directions) ends are fastened. As a result, one of the two end members 300 can firmly restrain the other in the front-rear direction (Y-axis direction). The two end members 300 connected to each other in this way are fastened to the fixed wall portion 140 by a plurality of bolts 50. That is, the two end members 300 and the power storage element unit 200 sandwiched between them are firmly fixed to the fixed wall portion 140.
 [3.エンド部材における各板材のサイズ及び形状]
 上記、蓄電素子ユニット200に側面に当接して配置されるエンド部材300は重ね合わされた複数の板材で形成されており、本実施の形態では、これら複数の板材の大きさ及び形状は互いに異なっている。この点に関し、図6~図8を用いて説明する。
[3. Size and shape of each plate in the end member]
The end member 300 arranged in contact with the side surface of the power storage element unit 200 is formed of a plurality of stacked plate materials, and in the present embodiment, the sizes and shapes of the plurality of plate materials are different from each other. There is. This point will be described with reference to FIGS. 6 to 8.
 図6は、実施の形態に係るエンド部材300の構成要素及びユニット端面201の横幅の大小関係を示す斜視図である。図7は、実施の形態に係るエンド部材300の構成要素及びユニット端面201の縦幅の大小関係を示す正面図である。図8は、実施の形態に係るエンド部材300の斜視図である。図6及び図7において、「横幅」はX軸方向の幅であり、「縦幅」はZ軸方向の幅である。図7では、蓄電素子ユニット200を、ユニット端面201の側から見た場合の図が示されており、ユニット端面201に対する内板材310のおおよその配置領域が、内板配置領域310a(ドットが付された領域)として図示されている。 FIG. 6 is a perspective view showing a magnitude relationship between the components of the end member 300 and the width of the unit end face 201 according to the embodiment. FIG. 7 is a front view showing the magnitude relationship between the components of the end member 300 and the vertical width of the unit end face 201 according to the embodiment. FIG. 8 is a perspective view of the end member 300 according to the embodiment. In FIGS. 6 and 7, the "horizontal width" is the width in the X-axis direction, and the "vertical width" is the width in the Z-axis direction. FIG. 7 shows a view of the power storage element unit 200 when viewed from the side of the unit end surface 201, and the approximate arrangement area of the inner plate material 310 with respect to the unit end surface 201 is the inner plate arrangement area 310a (dotted). Area).
 図6に示すように、エンド部材300を構成する複数の板材のうち、ユニット端面201に当接する内板材310の横幅Waは、ユニット端面201の横幅Wsよりも小さい。エンド部材300において内板材310の外側に位置する中間板材320の横幅Wb及び外板材330の横幅Wcは、ともに内板材310の横幅Waよりも大きい。外板材330の横幅Wcは中間板材320の横幅Wbよりも大きい。外板材330の横幅Wc及び中間板材320の横幅Wbのそれぞれは、ユニット端面201とY軸方向で対向する部分を基準にしている。つまり、外板材330の横幅Wcは、第一外板部331の横幅であり、中間板材320の横幅Wbは、第一中間板部321の横幅である。このことは、外板材330の縦幅及び中間板材320の縦幅にも適用される。 As shown in FIG. 6, among the plurality of plate materials constituting the end member 300, the width Wa of the inner plate material 310 that abuts on the unit end surface 201 is smaller than the width Ws of the unit end surface 201. The width Wb of the intermediate plate material 320 and the width Wc of the outer plate material 330 located outside the inner plate material 310 in the end member 300 are both larger than the width Wa of the inner plate material 310. The width Wc of the outer plate material 330 is larger than the width Wb of the intermediate plate material 320. Each of the width Wc of the outer plate material 330 and the width Wb of the intermediate plate material 320 is based on a portion facing the unit end surface 201 in the Y-axis direction. That is, the width Wc of the outer plate material 330 is the width of the first outer plate portion 331, and the width Wb of the intermediate plate material 320 is the width of the first intermediate plate portion 321. This also applies to the vertical width of the outer plate material 330 and the vertical width of the intermediate plate material 320.
 このように、ユニット端面201には、横幅がユニット端面201よりも小さい内板材310が当接し、その外側には内板材310よりも横幅が大きい中間板材320及び外板材330が配置される。内板材310は、中間板材320およびユニット端面201に対してX軸方向のプラス側またはマイナス側に著しく偏って配置されているのではない。内板材310のX軸方向の中央は、中間板材320およびユニット端面201のX軸方向の中央と一致(略一致も含む、以下同じ)している。言い換えれば、内板材310のX軸方向のプラス側またはマイナス側の端部は、中間板材320の第二中間板部325およびユニット端面202からX軸方向において所定距離だけ離間している。 As described above, the inner plate material 310 having a width smaller than that of the unit end surface 201 is in contact with the unit end surface 201, and the intermediate plate material 320 and the outer plate material 330 having a width larger than that of the inner plate material 310 are arranged outside the inner plate material 310. The inner plate member 310 is not remarkably biased toward the plus side or the minus side in the X-axis direction with respect to the intermediate plate member 320 and the unit end face 201. The center of the inner plate member 310 in the X-axis direction coincides with the center of the intermediate plate member 320 and the unit end face 201 in the X-axis direction (including substantially matching, the same applies hereinafter). In other words, the positive or negative end portion of the inner plate member 310 in the X-axis direction is separated from the second intermediate plate portion 325 of the intermediate plate member 320 and the unit end surface 202 by a predetermined distance in the X-axis direction.
 図7に示すように、エンド部材300の構成する複数の板材のうち、ユニット端面201に当接する内板材310の縦幅Haは、ユニット端面201の縦幅Hsよりも小さい。エンド部材300において内板材310の外側に位置する中間板材320の縦幅Hb及び外板材330の縦幅Hcは、ともに内板材310の縦幅Haよりも大きい。外板材330の縦幅Hcは中間板材320の縦幅Hbよりも大きい。このように、ユニット端面201には、縦幅がユニット端面201よりも小さい内板材310が当接し、その外側には内板材310よりも縦幅が大きい中間板材320及び外板材330が配置される。つまり、本実施の形態では、内板材310は、縦横ともにユニット端面201に小さく、Y軸方向から見た場合に、図7に示すように、ユニット端面201の外形の領域内の位置(内板配置領域310a)に配置される。 As shown in FIG. 7, of the plurality of plate materials constituting the end member 300, the vertical width Ha of the inner plate material 310 that abuts on the unit end surface 201 is smaller than the vertical width Hs of the unit end surface 201. The vertical width Hb of the intermediate plate material 320 and the vertical width Hc of the outer plate material 330 located outside the inner plate material 310 in the end member 300 are both larger than the vertical width Ha of the inner plate material 310. The vertical width Hc of the outer plate material 330 is larger than the vertical width Hb of the intermediate plate material 320. In this way, the inner plate material 310 having a vertical width smaller than that of the unit end surface 201 abuts on the unit end surface 201, and the intermediate plate material 320 and the outer plate material 330 having a vertical width larger than that of the inner plate material 310 are arranged on the outside thereof. .. That is, in the present embodiment, the inner plate material 310 is small in both the vertical and horizontal directions on the unit end surface 201, and when viewed from the Y-axis direction, as shown in FIG. 7, the position (inner plate) of the unit end surface 201 within the outer shape region. It is arranged in the arrangement area 310a).
 内板材310は、中間板材320およびユニット端面201に対してZ軸方向のプラス側またはマイナス側に著しく偏って配置されているのではない。内板材310のZ軸方向の中央は、中間板材320およびユニット端面201のZ軸方向の中央と一致している。 The inner plate material 310 is not remarkably biased to the plus side or the minus side in the Z-axis direction with respect to the intermediate plate material 320 and the unit end face 201. The center of the inner plate member 310 in the Z-axis direction coincides with the center of the intermediate plate member 320 and the unit end face 201 in the Z-axis direction.
 [4.効果等]
 以上説明したように、本実施の形態に係る蓄電装置10は、複数の蓄電素子210を有する蓄電素子ユニット200と、蓄電素子ユニット200の第一方向(本実施の形態ではY軸方向)の側方に配置される部分を有するエンド部材300とを備える。エンド部材300は、Y軸方向に重ねて配置された、内板材310及び外板材330を含む。内板材310は、蓄電素子ユニット200のY軸方向側の側面であるユニット端面201に当接する。内板材310は、蓄電素子ユニット200と外板材330との間に配置されており、Y軸方向と交差する第二方向(本実施の形態ではX軸方向)において、内板材310の幅は、ユニット端面201の幅よりも小さい。外板材330のX軸方向の幅は、内板材310のX軸方向の幅よりも大きい。
[4. Effect, etc.]
As described above, the power storage device 10 according to the present embodiment has a power storage element unit 200 having a plurality of power storage elements 210 and a side of the power storage element unit 200 in the first direction (Y-axis direction in the present embodiment). It includes an end member 300 having a portion arranged in the direction. The end member 300 includes an inner plate material 310 and an outer plate material 330 arranged so as to be overlapped in the Y-axis direction. The inner plate material 310 comes into contact with the unit end surface 201, which is the side surface of the power storage element unit 200 on the Y-axis direction side. The inner plate material 310 is arranged between the power storage element unit 200 and the outer plate material 330, and the width of the inner plate material 310 is set in the second direction (X-axis direction in the present embodiment) intersecting the Y-axis direction. It is smaller than the width of the unit end face 201. The width of the outer plate material 330 in the X-axis direction is larger than the width of the inner plate material 310 in the X-axis direction.
 この構成によれば、エンド部材300により、少なくとも蓄電素子ユニット200のユニット端面201側が保護される。エンド部材300は、少なくとも2つの板材が重ねられる部分を有することで、保護に必要な強度を得ることができる。さらに、内板材310の横幅がユニット端面201の横幅よりも小さく、かつ、外板材330の横幅が内板材310の横幅よりも大きいため、外板材330の内側への変形を容易にさせる空間が存在する。つまり、図8に示すように、外板材330のX軸方向の端部には、内板材310が配置されていない空間が存在する。この空間は、外板材330の内側への変形が、内板材310によって阻害されない空間である。そのため、外板材330に、蓄電素子ユニット200向きの大きな外力が作用した場合、外板材330が変形することにより外力を吸収できる。これにより、蓄電素子ユニット200が損傷する可能性が低減される。つまり、本実施の形態に係るエンド部材300は、複数の板材が重ねられることで所定の強度を有し、かつ、外板材330の幅が内板材310の幅よりも大きいことで、衝撃吸収が可能な変形能も有している。このように、本実施の形態に係る蓄電装置10は、安全性が向上された蓄電装置である。 According to this configuration, at least the unit end face 201 side of the power storage element unit 200 is protected by the end member 300. The end member 300 can obtain the strength required for protection by having a portion where at least two plate members are overlapped. Further, since the width of the inner plate material 310 is smaller than the width of the unit end face 201 and the width of the outer plate material 330 is larger than the width of the inner plate material 310, there is a space that facilitates the inward deformation of the outer plate material 330. To do. That is, as shown in FIG. 8, there is a space in which the inner plate material 310 is not arranged at the end portion of the outer plate material 330 in the X-axis direction. This space is a space in which the inward deformation of the outer plate material 330 is not hindered by the inner plate material 310. Therefore, when a large external force suitable for the power storage element unit 200 acts on the outer plate material 330, the outer plate material 330 is deformed to absorb the external force. This reduces the possibility of damage to the power storage element unit 200. That is, the end member 300 according to the present embodiment has a predetermined strength by stacking a plurality of plate materials, and the width of the outer plate material 330 is larger than the width of the inner plate material 310, so that shock absorption is achieved. It also has possible deformability. As described above, the power storage device 10 according to the present embodiment is a power storage device with improved safety.
 より詳細には、エンド部材300では、全体の厚みを大きくするのではなく、部分的に厚みを大きくすることで、高い剛性が求められる箇所の剛性を確保し、かつ、エンド部材300の変形のための空間を確保している。さらに、エンド部材300では、部分ごとの厚みの違いを、複数の板材を重ねることで実現しているため、単一の材料からエンド部材300を削り出すこと、または、鋳型でエンド部材300を作製することと比較するとエンド部材300の作製が容易である。 More specifically, in the end member 300, the rigidity of the portion where high rigidity is required is secured by partially increasing the thickness instead of increasing the total thickness, and the deformation of the end member 300 is performed. We have secured a space for this. Further, in the end member 300, since the difference in thickness of each part is realized by stacking a plurality of plate materials, the end member 300 is machined from a single material, or the end member 300 is manufactured by a mold. The end member 300 is easier to manufacture than the above.
 本実施の形態では、エンド部材300において、隣り合う2つの板材(内板材310及び中間板材320、並びに、中間板材320及び外板材330)は溶接によって機械的に接続されている。そのため、隣り合う2つの板材をボルト及びナット、またはリベット等で接続する場合と比較すると、蓄電装置10の軽量化または部品点数の削減が図られる。これによって、蓄電装置10の省スペース化および軽量化ができる効果がある。 In the present embodiment, in the end member 300, two adjacent plate materials (inner plate material 310 and intermediate plate material 320, and intermediate plate material 320 and outer plate material 330) are mechanically connected by welding. Therefore, as compared with the case where two adjacent plate members are connected by bolts and nuts, rivets, or the like, the weight of the power storage device 10 can be reduced or the number of parts can be reduced. This has the effect of saving space and weight of the power storage device 10.
 内板材310の大きさを、ユニット端面201と同程度にし、かつ、外板材330を、内板材310よりも大きく形成することで、外板材330の内側への変形を容易にする空間の形成は可能である。しかし、この場合は、蓄電装置10の大型化という別の問題が生じる。この点に関し、本実施の形態に係る蓄電装置10では、内板材310の幅を、ユニット端面201の幅よりも小さくしていることで、蓄電装置10の大型化を抑制するとともに、外板材330の内側への変形を容易にさせる空間を確保している。 By making the size of the inner plate material 310 about the same as the end face 201 of the unit and forming the outer plate material 330 larger than the inner plate material 310, the formation of a space that facilitates the inward deformation of the outer plate material 330 can be achieved. It is possible. However, in this case, another problem of increasing the size of the power storage device 10 arises. In this regard, in the power storage device 10 according to the present embodiment, the width of the inner plate material 310 is made smaller than the width of the unit end face 201, thereby suppressing the increase in size of the power storage device 10 and the outer plate material 330. A space is secured to facilitate the inward deformation of the.
 上記構成及びその効果の説明において、「外板材330」を「中間板材320」に置き換えることもできる。つまり、図6を用いて説明したように、内板材310の外側に配置される中間板材320の横幅は、内板材310の横幅よりも大きい。従って、図8に示すように、中間板材320のX軸方向の端部には、内板材310が配置されていない空間が存在し、この空間は、中間板材320の内側への変形が、内板材310によって阻害されない空間である。そのため、中間板材320は、蓄電素子ユニット200を保護するように、変形できる。さらに、上記構成及びその効果の説明において、第二方向である「X軸方向」を「Z軸方向」に置き換えることもできる。つまり、図7を用いて説明したように、内板材310の外側に配置される外板材330の縦幅は、内板材310の縦幅よりも大きい。従って、外板材330のZ軸方向の端部には、内板材310が配置されていない空間が存在し、この空間は、外板材330の内側への変形が、内板材310によって阻害されない空間である。そのため、外板材330は、蓄電素子ユニット200を保護するように変形できる。 In the above configuration and the explanation of its effect, the "outer plate material 330" can be replaced with the "intermediate plate material 320". That is, as described with reference to FIG. 6, the width of the intermediate plate material 320 arranged outside the inner plate material 310 is larger than the width of the inner plate material 310. Therefore, as shown in FIG. 8, at the end of the intermediate plate material 320 in the X-axis direction, there is a space in which the inner plate material 310 is not arranged, and in this space, the intermediate plate material 320 is deformed inward. It is a space that is not obstructed by the plate material 310. Therefore, the intermediate plate material 320 can be deformed so as to protect the power storage element unit 200. Further, in the description of the above configuration and its effect, the "X-axis direction" which is the second direction can be replaced with the "Z-axis direction". That is, as described with reference to FIG. 7, the vertical width of the outer plate material 330 arranged outside the inner plate material 310 is larger than the vertical width of the inner plate material 310. Therefore, at the end of the outer plate material 330 in the Z-axis direction, there is a space in which the inner plate material 310 is not arranged, and this space is a space in which the inward deformation of the outer plate material 330 is not hindered by the inner plate material 310. is there. Therefore, the outer plate material 330 can be deformed so as to protect the power storage element unit 200.
 本実施の形態では、第一方向(Y軸方向)及び第二方向(X軸方向)と交差する第三方向(本実施の形態ではZ軸方向)において、内板材310の幅は、ユニット端面201の幅よりも小さい。内板材310は、Y軸方向から見た場合に、ユニット端面201の外形の領域内に配置されている(図7参照)。 In the present embodiment, the width of the inner plate member 310 is the unit end face in the third direction (Z-axis direction in the present embodiment) intersecting the first direction (Y-axis direction) and the second direction (X-axis direction). It is smaller than the width of 201. The inner plate member 310 is arranged in the outer shape region of the unit end face 201 when viewed from the Y-axis direction (see FIG. 7).
 つまり、本実施の形態では、内板材310は、X軸方向から見た場合に、ユニット端面201の外形よりも小さいサイズに形成され、かつ、ユニット端面201の外形の領域内に配置される。従って、外板材330の変形を容易にさせる空間が増え、これにより、外板材330による外力の吸収効果が向上される。その結果、蓄電装置10の安全性が向上する。このことは、内板材310と外板材330との間の中間板材320にも適用される。つまり、内板材310がユニット端面201よりも小さいことで、中間板材320の変形を容易にさせる空間が増え、これにより、中間板材320による外力の吸収効果が向上される。このことは、蓄電装置10の安全性の向上に寄与する。 That is, in the present embodiment, the inner plate material 310 is formed in a size smaller than the outer shape of the unit end face 201 when viewed from the X-axis direction, and is arranged in the outer shape region of the unit end face 201. Therefore, the space for facilitating the deformation of the outer plate material 330 is increased, and the effect of absorbing the external force by the outer plate material 330 is improved. As a result, the safety of the power storage device 10 is improved. This also applies to the intermediate plate material 320 between the inner plate material 310 and the outer plate material 330. That is, since the inner plate material 310 is smaller than the unit end face 201, the space for facilitating the deformation of the intermediate plate material 320 is increased, and thus the effect of absorbing the external force by the intermediate plate material 320 is improved. This contributes to the improvement of the safety of the power storage device 10.
 本実施の形態では、複数の蓄電素子210のそれぞれは、長側面211をY軸方向に向けた姿勢で、Y軸方向に並んで配置されている。 In the present embodiment, each of the plurality of power storage elements 210 is arranged side by side in the Y-axis direction with the long side surface 211 facing the Y-axis direction.
 すなわち、Y軸方向の端部に位置する蓄電素子210の長側面211の外側にエンド部材300が配置される。これにより、蓄電素子210の変形しやすい部分である長側面211が保護され、長側面211の膨張が効率よく抑制される。その結果、蓄電装置10の安全性が向上する。 That is, the end member 300 is arranged outside the long side surface 211 of the power storage element 210 located at the end in the Y-axis direction. As a result, the long side surface 211, which is a easily deformable portion of the power storage element 210, is protected, and the expansion of the long side surface 211 is efficiently suppressed. As a result, the safety of the power storage device 10 is improved.
 本実施の形態では、エンド部材300は、内板材310と外板材330との間に配置された中間板材320を有する。中間板材320は、内板材310に対向する第一中間板部321と、蓄電素子ユニット200のユニット側面202に対向する第二中間板部325とを有する。外板材330は、中間板材320の第一中間板部321に対向する第一外板部331と、中間板材320の第二中間板部325に対向する第二外板部335とを有する。 In the present embodiment, the end member 300 has an intermediate plate material 320 arranged between the inner plate material 310 and the outer plate material 330. The intermediate plate member 320 has a first intermediate plate portion 321 facing the inner plate material 310 and a second intermediate plate portion 325 facing the unit side surface 202 of the power storage element unit 200. The outer plate material 330 has a first outer plate portion 331 facing the first intermediate plate portion 321 of the intermediate plate material 320, and a second outer plate portion 335 facing the second intermediate plate portion 325 of the intermediate plate material 320.
 この構成によれば、エンド部材300により、蓄電素子ユニット200のユニット端面201及びユニット側面202の両方の保護が図られる。そのため、蓄電装置10の安全性がより向上される。 According to this configuration, the end member 300 protects both the unit end surface 201 and the unit side surface 202 of the power storage element unit 200. Therefore, the safety of the power storage device 10 is further improved.
 ここで、本実施の形態では、上述のように、第二中間板部325の外側には、外板材330の第二外板部335が配置されており、図8に示すように、第二中間板部325のY軸方向の幅は、第二外板部335のY軸方向の幅よりも小さい。従って、X軸方向を「第一方向」と規定した場合、複数の蓄電素子210のそれぞれは、短側面212を第一方向(X軸方向)に向け、かつ、互いに隣り合う2つの蓄電素子210の長側面211が対向する姿勢で並んで配置されている、と説明される。さらに、第二中間板部325が、蓄電素子ユニット200のユニット側面202に当接して配置されている場合、蓄電装置10は、以下のように説明される。蓄電装置10は、蓄電素子ユニット200の第一方向(X軸方向)の側方に配置される部分を有するエンド部材300を備える。エンド部材300は、X軸方向に重ねて配置された、中間板材320(第二中間板部325)及び外板材330(第二外板部335)を含む。第二中間板部325は、蓄電素子ユニット200のX軸方向側の側面(本例の場合、ユニット側面202)に当接する。第二中間板部325は、蓄電素子ユニット200と第二外板部335との間に配置されており、X軸方向と交差する第二方向(本例の場合、Y軸方向)において、第二中間板部325の幅は、蓄電素子ユニット200のユニット側面202の幅よりも小さい。第二外板部335のY軸方向の幅は、第二中間板部325のY軸方向の幅よりも大きい。 Here, in the present embodiment, as described above, the second outer plate portion 335 of the outer plate material 330 is arranged outside the second intermediate plate portion 325, and as shown in FIG. 8, the second outer plate portion 335 is arranged. The width of the intermediate plate portion 325 in the Y-axis direction is smaller than the width of the second outer plate portion 335 in the Y-axis direction. Therefore, when the X-axis direction is defined as the "first direction", each of the plurality of power storage elements 210 has the short side surface 212 directed to the first direction (X-axis direction), and the two power storage elements 210 adjacent to each other. It is explained that the long side surfaces 211 of the above are arranged side by side in an opposite posture. Further, when the second intermediate plate portion 325 is arranged in contact with the unit side surface 202 of the power storage element unit 200, the power storage device 10 is described as follows. The power storage device 10 includes an end member 300 having a portion arranged sideways in the first direction (X-axis direction) of the power storage element unit 200. The end member 300 includes an intermediate plate material 320 (second intermediate plate portion 325) and an outer plate material 330 (second outer plate portion 335) arranged so as to be overlapped in the X-axis direction. The second intermediate plate portion 325 comes into contact with the side surface of the power storage element unit 200 on the X-axis direction side (in this example, the unit side surface 202). The second intermediate plate portion 325 is arranged between the power storage element unit 200 and the second outer plate portion 335, and is the second in the second direction (in the case of this example, the Y-axis direction) intersecting the X-axis direction. The width of the second intermediate plate portion 325 is smaller than the width of the unit side surface 202 of the power storage element unit 200. The width of the second outer plate portion 335 in the Y-axis direction is larger than the width of the second intermediate plate portion 325 in the Y-axis direction.
 このように、本実施の形態では、複数の蓄電素子210の短側面212の外側にエンド部材300が配置される。これにより、蓄電素子210の内部において短側面212の近くに集電体が配置されている場合、短側面212がエンド部材300に保護されていることで、蓄電装置10に衝撃が与えられた場合において、集電体が電極体を損傷する可能性が低減する。その結果、蓄電装置10の安全性が向上する。 As described above, in the present embodiment, the end member 300 is arranged outside the short side surface 212 of the plurality of power storage elements 210. As a result, when the current collector is arranged near the short side surface 212 inside the power storage element 210, or when the power storage device 10 is impacted by the short side surface 212 being protected by the end member 300. In, the possibility that the current collector damages the electrode body is reduced. As a result, the safety of the power storage device 10 is improved.
 図8に示すように、第二外板部335の内側には第二中間板部325が配置されていない空間が存在する。この空間は、第二外板部335の内側への変形が、第二中間板部325によって阻害されない空間である。そのため、第二外板部335に、蓄電素子ユニット200向きの大きな外力が作用した場合、第二外板部335が変形することにより外力を吸収できる。これにより、蓄電素子ユニット200が損傷する可能性が低減される。このことによっても蓄電装置10の安全性が向上する。 As shown in FIG. 8, there is a space inside the second outer plate portion 335 where the second intermediate plate portion 325 is not arranged. This space is a space in which the inward deformation of the second outer plate portion 335 is not hindered by the second intermediate plate portion 325. Therefore, when a large external force suitable for the power storage element unit 200 acts on the second outer plate portion 335, the second outer plate portion 335 is deformed to absorb the external force. This reduces the possibility of damage to the power storage element unit 200. This also improves the safety of the power storage device 10.
 本実施の形態では、エンド部材300は、蓄電素子ユニット200のY軸方向における両側のそれぞれに配置されている。2つのエンド部材300のうちの一方の外板材330の第二外板部335は、2つのエンド部材300のうちの他方の外板材330の第二外板部335と連結される連結部336を有する。 In the present embodiment, the end members 300 are arranged on both sides of the power storage element unit 200 in the Y-axis direction. The second outer plate portion 335 of one of the two end members 300 has a connecting portion 336 connected to the second outer plate portion 335 of the other outer plate material 330 of the two end members 300. Have.
 このように、本実施の形態では、一対のエンド部材300により、蓄電素子ユニット200のY軸方向の両方のユニット端面201、及び、これらユニット端面201を接続するユニット側面202が保護される。一対のエンド部材300は、2つの第二外板部335が連結されることで、機械的に接続される。そのため、一方のエンド部材300が他方のエンド部材300を補強する部材として機能する。従って、蓄電装置10の安全性がより向上される。 As described above, in the present embodiment, the pair of end members 300 protects both unit end faces 201 in the Y-axis direction of the power storage element unit 200 and the unit side surface 202 connecting these unit end faces 201. The pair of end members 300 are mechanically connected by connecting the two second outer plate portions 335. Therefore, one end member 300 functions as a member for reinforcing the other end member 300. Therefore, the safety of the power storage device 10 is further improved.
 (他の実施の形態)
 以上、本発明に係る蓄電装置について、実施の形態に基づいて説明した。しかしながら、本発明は、上記実施の形態に限定されるものではない。本発明の趣旨を逸脱しない限り、当業者が思いつく各種変形を上記実施の形態に施したものも、あるいは、上記説明された複数の構成要素を組み合わせて構築される形態も、本発明の範囲内に含まれる。
(Other embodiments)
The power storage device according to the present invention has been described above based on the embodiment. However, the present invention is not limited to the above embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the above-described embodiment, or a form constructed by combining the plurality of components described above is also within the scope of the present invention. include.
 蓄電素子210の短側面212側の保護を主眼とした場合、エンド部材300は、内板材310が、ユニット側面202に当接する姿勢で配置されてもよい。つまり、エンド部材300の姿勢が、図4に示す姿勢と同じである場合、複数の蓄電素子210のそれぞれは、短側面212を第一方向(Y軸方向)に向け、かつ、互いに隣り合う2つの蓄電素子210の長側面211が対向する姿勢で並んで配置されてもよい。この場合、ユニット側面202は、第一側面の一例であり、ユニット端面201は第二側面の一例である。 When the main purpose is to protect the short side surface 212 side of the power storage element 210, the end member 300 may be arranged so that the inner plate material 310 is in contact with the unit side surface 202. That is, when the posture of the end member 300 is the same as the posture shown in FIG. 4, each of the plurality of power storage elements 210 has the short side surface 212 directed in the first direction (Y-axis direction) and is adjacent to each other. The long side surfaces 211 of the two power storage elements 210 may be arranged side by side in opposite positions. In this case, the unit side surface 202 is an example of the first side surface, and the unit end surface 201 is an example of the second side surface.
 この構成が採用された場合であっても、エンド部材300は、複数の板材が重ねられていることで蓄電素子ユニット200の保護に必要な強度を得ることができる。エンド部材300には、内板材310よりも外側の板材(中間板材320及び外板材330)の内側への変形を容易にする空間が形成される。 Even when this configuration is adopted, the end member 300 can obtain the strength required for the protection of the power storage element unit 200 by stacking a plurality of plate materials. The end member 300 is formed with a space that facilitates inward deformation of the plate materials (intermediate plate material 320 and outer plate material 330) outside the inner plate material 310.
 エンド部材300を構成する板材の数は3には限定されない。エンド部材300は少なくとも2枚の板材が重ねられることで構成されればよい。内板材310と中間板材320とでエンド部材300が構成されてもよい。この場合、内板材310から見ると、中間板材320は「外板材」である。内板材310と、内板材310に接合された外板材330とでエンド部材300が構成されてもよい。中間板材320をユニット端面201またはユニット側面202に当接させて配置した場合、中間板材320と外板材330とでエンド部材300が構成されてもよい。この場合、外板材330から見ると、中間板材320は「内板材」である。いずれの場合であっても、エンド部材300は、複数の板材が重ねられていることで蓄電素子ユニット200の保護に必要な強度を得ることができ、かつ、外側の板材の内側への変形を容易にする空間を形成できる。 The number of plate materials constituting the end member 300 is not limited to 3. The end member 300 may be formed by stacking at least two plate members. The end member 300 may be composed of the inner plate material 310 and the intermediate plate material 320. In this case, the intermediate plate material 320 is an "outer plate material" when viewed from the inner plate material 310. The end member 300 may be composed of the inner plate material 310 and the outer plate material 330 joined to the inner plate material 310. When the intermediate plate material 320 is arranged so as to be in contact with the unit end surface 201 or the unit side surface 202, the end member 300 may be composed of the intermediate plate material 320 and the outer plate material 330. In this case, the intermediate plate material 320 is an "inner plate material" when viewed from the outer plate material 330. In any case, the end member 300 can obtain the strength required for the protection of the power storage element unit 200 by stacking a plurality of plate materials, and the end member 300 is deformed to the inside of the outer plate material. A space can be formed to facilitate.
 中間板材320は、第二中間板部325を有しない平板状の板材であってもよい。外板材330も同様に、第二外板部335を有しない平板状の板材であってもよい。この場合、接続板380のような、一対のエンド部材300を接続する接続部材が配置されていれば、一対のエンド部材300で蓄電素子ユニット200を拘束し、保護することは可能である。上述のように、内板材310の幅がユニット端面201の幅よりも小さい等の構成を有することで、内板材310の外側の板材(中間板材320または外板材330)の変形を容易にさせる空間は確保される。つまり、エンド部材300は衝撃吸収機能を発揮できる。 The intermediate plate material 320 may be a flat plate material having no second intermediate plate portion 325. Similarly, the outer plate material 330 may be a flat plate material having no second outer plate portion 335. In this case, if a connecting member for connecting the pair of end members 300, such as the connecting plate 380, is arranged, the power storage element unit 200 can be restrained and protected by the pair of end members 300. As described above, a space that facilitates deformation of the outer plate material (intermediate plate material 320 or outer plate material 330) of the inner plate material 310 by having a configuration such that the width of the inner plate material 310 is smaller than the width of the unit end face 201. Is secured. That is, the end member 300 can exert a shock absorbing function.
 実施の形態では、一対のエンド部材300を接続するために、ボルト60及びナット62を用いたが、一対のエンド部材300を接続する手法に限定はない。一対のエンド部材300の一部同士をかしめること、または、溶接することで、一対のエンド部材300が接続されてもよい。 In the embodiment, the bolt 60 and the nut 62 are used to connect the pair of end members 300, but the method of connecting the pair of end members 300 is not limited. The pair of end members 300 may be connected by caulking or welding a part of the pair of end members 300 to each other.
 蓄電装置10の構成要素の素材は、実施の形態で説明された素材には限定されない。筐体100及びエンド部材300のそれぞれは金属製でなくてもよい。繊維強化プラスチックのような非金属によって筐体100及びエンド部材300が形成されてもよい。エンド部材300を構成する複数の板材のそれぞれの素材が異なっていてもよい。エンド部材300に求められる強度、剛性、または製造コスト等に基づいて複数の板材のそれぞれの素材が決定されてもよい。 The material of the component of the power storage device 10 is not limited to the material described in the embodiment. Each of the housing 100 and the end member 300 does not have to be made of metal. The housing 100 and the end member 300 may be formed of a non-metal such as fiber reinforced plastic. The materials of the plurality of plate materials constituting the end member 300 may be different. Each material of the plurality of plate materials may be determined based on the strength, rigidity, manufacturing cost, etc. required for the end member 300.
 上記実施の形態に含まれる構成要素を任意に組み合わせて構築される形態も、本発明の範囲内に含まれる。 A form constructed by arbitrarily combining the components included in the above-described embodiment is also included in the scope of the present invention.
 本発明は、リチウムイオン二次電池などの蓄電素子を備えた蓄電装置に適用できる。 The present invention can be applied to a power storage device provided with a power storage element such as a lithium ion secondary battery.
  10 蓄電装置
 200 蓄電素子ユニット
 201 ユニット端面
 202 ユニット側面
 210 蓄電素子
 211 長側面
 212 短側面
 300 エンド部材
 310 内板材
 320 中間板材
 321 第一中間板部
 325 第二中間板部
 330 外板材
 331 第一外板部
 335 第二外板部
 336 連結部
 500 他の部材
10 Power storage device 200 Power storage element unit 201 Unit end face 202 Unit side surface 210 Power storage element 211 Long side surface 212 Short side surface 300 End member 310 Inner plate material 320 Intermediate plate material 321 First intermediate plate part 325 Second intermediate plate part 330 Outer plate material 331 First outer Plate part 335 Second outer plate part 336 Connecting part 500 Other members

Claims (6)

  1.  複数の蓄電素子を有する蓄電素子ユニットと、
     前記蓄電素子ユニットの第一方向の側方に配置される部分を有するエンド部材とを備え、
     前記エンド部材は、前記第一方向に重ねて配置された、内板材及び外板材を含み、前記内板材は、前記蓄電素子ユニットの前記第一方向側の側面である第一側面に当接し、かつ、前記蓄電素子ユニットと前記外板材との間に配置されており、
     前記第一方向と交差する第二方向において、前記内板材の幅は、前記蓄電素子ユニットの前記第一側面の幅よりも小さく、
     前記外板材の前記第二方向の幅は、前記内板材の前記第二方向の幅よりも大きい、
     蓄電装置。
    A power storage element unit having a plurality of power storage elements and
    It is provided with an end member having a portion arranged on the side in the first direction of the power storage element unit.
    The end member includes an inner plate material and an outer plate material arranged so as to be overlapped in the first direction, and the inner plate material abuts on the first side surface which is the side surface on the first direction side of the power storage element unit. Moreover, it is arranged between the power storage element unit and the outer plate material.
    In the second direction intersecting the first direction, the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit.
    The width of the outer plate material in the second direction is larger than the width of the inner plate material in the second direction.
    Power storage device.
  2.  前記第一方向及び前記第二方向と交差する第三方向において、前記内板材の幅は、前記蓄電素子ユニットの前記第一側面の幅よりも小さく、
     前記内板材は、前記第一方向から見た場合に、前記第一側面の外形の領域内に配置されている、
     請求項1記載の蓄電装置。
    In the first direction and the third direction intersecting the second direction, the width of the inner plate material is smaller than the width of the first side surface of the power storage element unit.
    The inner plate material is arranged in the outer shape region of the first side surface when viewed from the first direction.
    The power storage device according to claim 1.
  3.  前記複数の蓄電素子のそれぞれは、長側面を前記第一方向に向けた姿勢で、前記第一方向に並んで配置されている、
     請求項1または2記載の蓄電装置。
    Each of the plurality of power storage elements is arranged side by side in the first direction with the long side surface facing the first direction.
    The power storage device according to claim 1 or 2.
  4.  前記複数の蓄電素子のそれぞれは、短側面を前記第一方向に向け、かつ、互いに隣り合う2つの蓄電素子の長側面が対向する姿勢で並んで配置されている、
     請求項1または2記載の蓄電装置。
    Each of the plurality of power storage elements is arranged side by side with the short side facing the first direction and the long sides of the two power storage elements adjacent to each other facing each other.
    The power storage device according to claim 1 or 2.
  5.  前記エンド部材はさらに、前記内板材と前記外板材との間に配置された中間板材を有し、
     前記中間板材は、前記内板材に対向する第一中間板部と、前記蓄電素子ユニットの前記第一側面に隣接する第二側面に対向する第二中間板部とを有し、
     前記外板材は、前記中間板材の前記第一中間板部に対向する第一外板部と、前記中間板材の前記第二中間板部に対向する第二外板部とを有する、
     請求項1~4のいずれか一項に記載の蓄電装置。
    The end member further has an intermediate plate material arranged between the inner plate material and the outer plate material.
    The intermediate plate material has a first intermediate plate portion facing the inner plate material and a second intermediate plate portion facing the second side surface adjacent to the first side surface of the power storage element unit.
    The outer plate material has a first outer plate portion of the intermediate plate material facing the first intermediate plate portion and a second outer plate portion of the intermediate plate material facing the second intermediate plate portion.
    The power storage device according to any one of claims 1 to 4.
  6.  前記エンド部材は、前記蓄電素子ユニットの前記第一方向における両側のそれぞれに配置されており、
     2つの前記エンド部材のうちの一方の前記外板材の前記第二外板部は、2つの前記エンド部材のうちの他方の前記外板材の前記第二外板部と連結される連結部を有する、
     請求項5記載の蓄電装置。
    The end members are arranged on both sides of the power storage element unit in the first direction.
    The second outer plate portion of the outer plate material of one of the two end members has a connecting portion connected to the second outer plate portion of the outer plate material of the other of the two end members. ,
    The power storage device according to claim 5.
PCT/JP2020/011623 2019-03-18 2020-03-17 Power storage device WO2020189657A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015225700A (en) * 2014-05-26 2015-12-14 本田技研工業株式会社 Power storage device
WO2016084272A1 (en) * 2014-11-28 2016-06-02 三洋電機株式会社 Battery pack and vehicle equipped with same
JP2017069004A (en) * 2015-09-29 2017-04-06 株式会社Gsユアサ Power storage device and manufacturing method of the same
CN206250254U (en) * 2016-12-27 2017-06-13 宁德时代新能源科技股份有限公司 Battery modules end board assembly and battery modules
CN207967108U (en) * 2018-03-09 2018-10-12 宁德时代新能源科技股份有限公司 Battery modules end plate and battery modules

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015225700A (en) * 2014-05-26 2015-12-14 本田技研工業株式会社 Power storage device
WO2016084272A1 (en) * 2014-11-28 2016-06-02 三洋電機株式会社 Battery pack and vehicle equipped with same
JP2017069004A (en) * 2015-09-29 2017-04-06 株式会社Gsユアサ Power storage device and manufacturing method of the same
CN206250254U (en) * 2016-12-27 2017-06-13 宁德时代新能源科技股份有限公司 Battery modules end board assembly and battery modules
CN207967108U (en) * 2018-03-09 2018-10-12 宁德时代新能源科技股份有限公司 Battery modules end plate and battery modules

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