JP5292789B2 - Assembled battery and manufacturing method of assembled battery - Google Patents

Description

  The present invention relates to an assembled battery in which a plurality of battery modules are stacked and a method for manufacturing the assembled battery.

  In recent years, an assembled battery in which a battery module in which a plurality of batteries are housed is stacked has been used (see, for example, Patent Document 1). In this assembled battery, a battery module is stacked on a lower case, a restraint plate is stacked on the lower case, and a bolt is passed between the lower case and the restraint plate and fastened with a bolt, thereby fixing the battery module sandwiched between the lower case and the restraint plate. ing.

However, in such a structure, when fastening with through bolts, the through bolts may not reach due to the floating of the stacked battery modules. There is a problem that the number of work steps increases.
JP 2005-149837 A

  The present invention has been made to solve the above-described problems associated with the prior art, and an object thereof is to provide an assembled battery and a method of manufacturing the assembled battery that can reduce the work man-hours and the working time.

  The assembled battery according to the present invention that achieves the above object is provided by stacking a plurality of battery modules in which a plurality of electrically connected batteries are housed in a casing and placing the module on the lower case, and the stacked batteries An assembled battery in which a module is held between a lower case and a restraint plate from the stacking direction, the restraint plate extending from an outer peripheral portion to the lower case and a restraint plate temporary holding portion having a locking portion formed at the tip The lower case has a locked portion to which the locking portion of the restraining plate temporary holding portion is locked.

In another form of the assembled battery according to the present invention, which achieves the above object, a plurality of battery modules each having a plurality of electrically connected batteries housed in a housing are stacked and placed on the lower case. The assembled battery is held by sandwiching the stacked battery modules between the lower case and the restraining plate from the stacking direction. The constraining plate of the battery pack, as well as extending to the lower case, the locking pin engaging portion is provided is fixed to the distal end, said lower case is engaging portion of the engaging pin engaging To be locked. In addition, a recessed portion is formed in the engaged portion, a hook that engages with the recessed portion is formed in the engaging portion, and the engaging portion is accommodated in an accommodating space that penetrates the engaging pin in the radial direction. The hooks of the locking portions are formed to protrude in pairs in both radial directions of the locking pins, and the locking portions are rotatably connected to the locking pins in the housing space. In the meantime, there is formed a rotation suppressing portion that extends in the axial direction of the locking pin and that contacts the inner wall in the housing space and suppresses rotation when the locking portion rotates.

  A method of manufacturing an assembled battery according to the present invention that achieves the above object includes stacking a plurality of battery modules each including a plurality of electrically connected batteries housed in a housing and placing the module on the lower case. A battery assembly manufacturing method for holding a battery module sandwiched between a lower case and a restraint plate from the stacking direction, the restraint plate temporary extending from the outer periphery of the restraint plate to the lower case and having a locking portion formed at the tip. The holding part is locked to a locked part formed in the lower case, and the battery module is temporarily held between the restricting plate and the lower case, and then the restricting plate and the lower case are fixed.

Another embodiment of the method for manufacturing an assembled battery according to the present invention that achieves the above object is to stack a plurality of battery modules in which a plurality of electrically connected batteries are housed in a housing and place the battery modules on a lower case. And a method of manufacturing an assembled battery in which the stacked battery modules are held between the lower case and the restraining plate from the stacking direction. In the manufacturing method, the locking pin fixed to the restraining plate and extending with respect to the lower case and having a locking portion formed at the tip thereof is locked to the locked portion formed on the lower case, thereby Secure the restraint plate and the lower case. Further, it is locked by hooking a hook formed on the locking portion to the recess formed in the locked portion, and the locking portion is accommodated in an accommodation space penetrating the locking pin in the radial direction, The hooks of the locking portions are formed to protrude in pairs in both radial directions of the locking pins, and the locking portions are rotatably connected to the locking pins in the accommodating space. Between the hooks, there is formed a rotation suppressing portion that extends in the axial direction of the locking pin and contacts the inner wall in the accommodation space to suppress rotation when the locking portion rotates.

  The assembled battery according to the present invention configured as described above is provided with a restraint plate temporary holding portion that temporarily holds the restraint plate and the lower case, so that the battery module can be prevented from lifting when the restraint plate and the lower case are fixed. Man-hours and working time can be reduced.

Further, in another embodiment of the assembled battery according to the present invention configured as described above, a locking portion for locking with the locked portion of the lower case is provided at the tip of the locking pin provided on the restraining plate. Therefore, the locking pins can be fixed together with the restraining plate to the lower case, and the work man-hours and work time can be reduced. Moreover, since the rotation suppression part is provided in the latching | locking part, rotation of a latching | locking part can be suppressed and the direction of the latching | locking part at the time of inserting a latching pin can be hold | maintained favorably.

  In the assembled battery manufacturing method according to the present invention configured as described above, after temporarily holding the restraint plate and the lower case by the restraint plate temporary holding portion, the restraint plate and the lower case are fixed. The lifting of the battery module can be suppressed, and the work man-hours and work time can be reduced.

In another embodiment of the method for manufacturing an assembled battery according to the present invention configured as described above, a locking pin having a locking portion formed at the tip is locked to a locked portion formed in the lower case. Thus, since the restraining plate and the lower case are fixed, the locking pins can be fixed together with the restraining plate to the lower case, and the work man-hours and working time can be reduced. Moreover, since the rotation suppression part is provided in the latching | locking part, rotation of a latching | locking part can be suppressed and the direction of the latching | locking part at the time of inserting a latching pin can be hold | maintained favorably.

  Embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
1 is a perspective view showing an assembled battery according to this embodiment, FIG. 2 is an exploded perspective view showing the assembled battery according to this embodiment, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. FIG. 5 is an exploded perspective view of the battery module, FIG. 6 is a perspective view of a flat battery, and FIG. 7 is a view of a restraint plate in the assembled battery according to the embodiment. FIG. 8 is a partial perspective view showing a state where the side plate is temporarily held by the side plate temporary holding portion of the restraint plate, and FIG. 9 is taken along the line IX-IX in FIG. FIG. 10 is a partial cross-sectional view, FIG. 10 is a partial perspective view showing another example of the restraint plate, and FIG. 11 is a partial perspective view showing still another example of the restraint plate.

  As shown in FIGS. 1 to 3, in the assembled battery 1 according to the present embodiment, for example, five rows of battery module groups 3 configured by stacking two battery modules 2 are placed in the lower case 4.

  A restraint plate 5 is provided on the uppermost part of the battery module group 3, and the restraint plate 5 is fastened to the lower case 4 by a through bolt 6 so that the battery module group 3 is fixed between the restraint plate 5 and the lower case 4. . Spacers 8 are arranged above and below the through holes 7 of the battery module 2 into which the through bolts 6 are inserted, for receiving a load and ensuring a space for cooling air to pass through.

  As shown in FIGS. 4 and 5, the battery module 2 includes a housing 9 that covers the outside and a plurality of flat batteries 10 that are stacked and held inside the housing 9.

  The housing 9 is fastened to the main body 12 by a tightening process to cover the concave portion 11 while covering the main body 12 having the concave portion 11 for housing the flat battery 10 and the opening of the concave portion 11 of the main body 12. And a lid 13. A tightening portion 17 is formed at the edge of the lid surface 15 by a tightening process.

  The housing 9 serves to protect the flat battery 10 having low strength from external vibrations and shocks and to dissipate heat transmitted from the flat battery 10, and is formed of, for example, aluminum having good heat dissipation. ing.

  As shown in FIG. 6, each of the flat batteries 10 has a flat rectangular shape, and a plurality of positive and negative electrode plates, which are power generation elements, are alternately stacked with a separator interposed therebetween. The electrode tab 15 connected to the positive electrode plate and the negative electrode plate is led out from the outer material 14 while being housed together with the electrolyte in the outer material 14 such as a film. In the plurality of flat batteries 10 formed in this way, the electrode tabs 15 are electrically connected in series or in parallel by welding or the like, and both ends thereof (when the flat batteries 10 are connected in series) The positive electrode having the highest potential and the negative electrode of the battery having the lowest potential, or the positive and negative electrodes of each battery when connected in parallel, are connected to the positive and negative output terminals 18A and 18B of the battery module 2, respectively. Connected. The positive and negative output terminals 18A and 18B are led out from the housing 9 in a direction orthogonal to the stacking direction of the battery modules 2 (in the horizontal direction when the stacking direction of the battery modules 2 is up and down).

  The plurality of battery modules 2 placed on the lower case 4 are arranged with the output terminals 18 facing the same direction. A side plate 20 provided with a plurality of bus bars 21 for connecting the output terminals 18 of the battery modules 2 in series is installed on a side surface where the output terminals 18 of the plurality of battery modules 2 are provided. The bus bar 21 is disposed on a plate member 22 made of an insulating material such as a resin so as to pass the output terminals 18 that are electrically connected to each other. The bus bar 21 is connected to the output terminal 18 by a side plate fastening bolt 23.

  As shown in FIGS. 7 to 9, the restraint plate 5 has a restraint plate temporary holding portion 30 that extends from the outer peripheral portion of the restraint plate 5 to the lower case 4 and has a hook-shaped locking portion 31 formed at the tip. A plurality are formed. In the present embodiment, a restraint plate temporary holding portion 30 is provided on the side surface where the output terminal 18 of the battery module 2 is provided and the outer peripheral portion of the restraint plate 5 corresponding to the opposite surface. The restraint plate 5 is formed of, for example, a thin steel plate, and the restraint plate temporary holding portion 30 can be integrally formed with the restraint plate 5 by pressing or the like. However, the restraint plate temporary holding portion 30 may be attached by welding or the like.

  In the lower case 4, a locked portion 32 is formed on the surface on which the battery module 2 is placed, and the locked portion 31 of the constraint plate temporary holding portion 30 is hooked and locked.

  Each of the constraining plate temporary holding portions 30 provided corresponding to the side surfaces on which the output terminals 18 are provided is for holding both ends of the side plate 20 in the battery module stacking direction on the side opposite to the side facing the battery module 2. A pair of side plate temporary holding portions 40 is provided. The pair of side plate temporary holding portions 40 are formed to extend in opposite directions, and the side plate 20 can be temporarily held between the constraining plate temporary holding portion 30 and the side plate temporary holding portion 40. The gap X between the constraining plate temporary holding portion 30 and the side plate temporary holding portion 40 is larger than the plate thickness d of the side plate 20, and the holding length L between the two side plate temporary holding portions 40 is equal to the side plate. It is formed longer than the width W of 20. The side plate temporary holding portion 40 can be easily formed by cutting and raising from the constraining plate temporary holding portion 30. Moreover, as shown in FIG. 10, it is also possible to form side plate temporary holding part 40 'in the side part of restraint board temporary holding part 30', and as shown in FIG. 11, side plate temporary holding part It is also possible to form 40 ″ from the side portion of the constraining plate temporary holding portion 30 ″.

  Next, a method for manufacturing the assembled battery 1 according to the first embodiment will be described.

  12 is a perspective view showing the side plate temporarily held on the restraint plate, FIG. 13 is a perspective view showing the restraint plate temporarily held on the lower case 4, and FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG. FIGS. 15A and 15B are partial perspective views for explaining the side plate temporary holding structure in the assembled battery of the comparative example, where FIG. 15A shows before temporary holding and FIG. 15B shows after temporary holding.

  First, as shown in FIGS. 8, 9 and 12, the side plate 20 is fitted into the side plate temporary holding portion 40 of the restraint plate 5. At this time, since the side plate 20 is thin and easily bent, it can be easily fitted.

  Next, as shown in FIGS. 13 and 14, the restraint plate 5 is put on the battery module 2 placed on the lower case 4. At this time, the locking portion 31 at the tip of the restraint plate temporary holding portion 30 is hooked on the locked portion 32 of the lower case 4, and the restraint plate 5 is temporarily held by the lower case 4. Thereafter, the restraint plate 5 is fastened to the lower case 4 with a bolt 6, and the battery module group 3 is fixed between the restraint plate 5 and the lower case 4. At this time, since the restraint plate 5 is temporarily held by the lower case 4, the battery module 2 is not lifted up, and the through bolt 6 can be fastened without performing a work such as pressing by hand.

  Next, as shown in FIGS. 1 and 3, the bus bar 21 of the side plate 20 is fixed to the output terminal 18 of the battery module 2 by the side plate fastening bolts 23. Here, in the temporary holding structure of the comparative example shown in FIG. 15, the temporary holding flap 51 formed on the side plate 50 is hooked on the temporary holding pin 53 of the restraint plate 52 before the side plate fastening bolts are fastened. By fitting the cap 54, the side plate 50 is temporarily held on the restraint plate 52, and the number of work steps is increased. However, in this embodiment, since the side plate 20 is already temporarily held by the side plate temporary holding part 40, the side plate fastening bolt 23 can be easily fastened. Further, the side plate 20 can slide in the extending direction of the side plate 20, the gap X of the side plate temporary holding portion 40 is larger than the plate thickness d of the side plate 20, and the holding length L of the side plate temporary holding portion 40. Is longer than the width W of the side plate 20, the bus bar 21 can be moved relative to the electrode terminals. For this reason, it is possible to fasten the side plate fastening bolt 23 while positioning the bus bar 21 at an optimal position with respect to the electrode terminal 18.

  Thus, by providing the restraint plate temporary holding part 30 and the side plate temporary holding part 40, it is possible to reduce work man-hours and improve workability, and to shorten work time.

Second Embodiment
16 is a perspective view showing an assembled battery according to the second embodiment, FIG. 17 is an exploded perspective view showing the assembled battery according to the second embodiment, FIG. 18 is a sectional view taken along line XVIII-XVIII in FIG. Fig. 20 is a side view showing a locking pin of an assembled battery according to the second embodiment, Fig. 20 is a partially enlarged sectional view of the tip of the locking pin, and Fig. 21 is a partially enlarged sectional view taken along line XXI-XXI in Fig. 20. is there. In addition, about the site | part which has the same function as 1st Embodiment, the same code | symbol is used and in order to avoid duplication, the description is abbreviate | omitted.

  As shown in FIGS. 16 to 18, in the assembled battery 60 according to the second embodiment, for example, five battery module groups 3 formed by stacking two battery modules 2 are placed in the lower case 61. .

  A restraint plate 62 is provided on the uppermost part of the battery module group 3, and a plurality of locking pins 63 are fixed to the restraint plate 62. When the locking pin 63 is locked to the lower case 61, the battery module group 3 is fixed between the restraining plate 62 and the lower case 61. Spacers 8 are arranged above and below the through-holes 7 of the battery module 2 in which the locking pins 63 are inserted to receive a load and secure a space for cooling air to pass through.

  The restraint plate 62 is formed of, for example, a thin steel plate, and can be formed by pressing or the like.

  The locking pin 63 is made of metal, for example, and is fixed to the restraint plate 62 by welding or the like and extends from the vicinity of the outer peripheral portion of the restraint plate 62 to the lower case 61 as shown in FIGS. An accommodation space 64 penetrating in the radial direction is formed at the tip of the locking pin 63. The accommodation space 64 accommodates a locking portion 66 formed with a hook portion 65 protruding from the accommodation space 64 in both radial directions. The locking portion 66 is rotatably connected to the locking pin 63 by the connecting pin 67 having a hook formed by cracking the tip passing through the locking pin 63 and the locking portion 66. The locking part 66 is made of metal, for example.

  The hook portion 65 has a tapered shape in which the distal end side of the locking pin 63 is inclined, and can be elastically deformed in the radial center direction. Rotation between the pair of two hook portions 65 extends in the axial direction of the locking pin 63 in the accommodation space 64 and rotates with the inner wall of the accommodation space 64 when the locking portion 66 rotates. A suppressing portion 68 is formed.

  The lower case 61 is formed with a locked portion 69 on the surface on which the battery module 2 is placed, to which the locking portion 66 at the tip of the locking pin 63 is locked. A recessed portion 70 corresponding to the hook portion 65 is formed in the locked portion 69 so that the hook portion 65 of the locking portion 66 is hooked and engaged.

  Next, a method for manufacturing the assembled battery 60 according to this embodiment will be described.

  FIG. 22 is a partially enlarged cross-sectional view of the assembled battery showing a state in which the restraining plate is locked to the lower case by the locking pins.

  First, the battery module 2 is placed on the lower case 61, and the restraint plate 62 is placed thereon. At this time, the locking pin 63 fixed to the restraining plate 62 passes through the through hole 7 of the battery module 2, and the locking portion 66 at the tip of the locking pin 63 is engaged with the lower case 61 as shown in FIG. 22. The stop 69 is reached. The locking portion 66 has a tapered shape at the distal end side, and is smoothly inserted to be elastically deformed toward the center side, and is locked to the locked portion 69. As a result, the hook portion 65 that has been retracted in the radial center direction protrudes outward in the radial direction and is caught in the recess 70, and cannot be retracted in the pulling direction, and the restraint plate 62 is fixed to the lower case 61.

  Thus, according to this embodiment, since the locking pin 63 is fixed in advance to the restraining plate 62, all the locking pins 63 can be attached together with the restraining plate 62, and only by pushing in. The locking part 66 can be fixed to the locked part 69. Therefore, it is possible to reduce work man-hours to improve workability and shorten work time.

  Further, since the locking pin 63 penetrates the through hole 3, the battery module 2 can be fixed while being positioned well.

  Moreover, since the rotation suppression part 68 is provided in the latching | locking part 66, rotation of the latching | locking part 66 can be suppressed and the direction of the latching | locking part 66 at the time of inserting a latching pin can be hold | maintained favorably.

  As a modification of the assembled battery according to the second embodiment, as shown in FIG. 23, a recess 81 may be provided in the locking portion 80 and a hook portion 83 may be provided in the locked portion 82. Moreover, you may form a latching | locking part integrally at the front-end | tip of a latching pin. In addition, the hook portion may not be able to advance and retract in the radial direction by elastic deformation of the hook portion, but may be advanced and retracted by a spring or the like. In addition, the distal end side of the locking portion 66 is not tapered, but the side of the locked portion 69 where the locking pin 63 is inserted can be tapered.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, in the present embodiment, the battery module group 3 includes two battery modules 2, but the number may be other than two, and the battery module group 3 may be other than five rows. Moreover, the constraining plate temporary holding part 30 may be provided not only on the two sides of the constraining plate 5 but on three or more sides. Further, in the assembled battery 1 according to the first embodiment, a hook portion is not provided in the locking portion 31 and a recess is provided in the locked portion 32, but a recess is provided in the locking portion 31 and the locked portion 32 is provided. You may provide a hook part in this.

It is a perspective view which shows the assembled battery which concerns on this embodiment. It is a disassembled perspective view which shows the assembled battery which concerns on this embodiment. It is sectional drawing which follows the III-III line of FIG. It is a perspective view which shows the battery module of the assembled battery which concerns on this embodiment. It is a disassembled perspective view of the battery module. It is a perspective view which shows a flat type battery. It is a fragmentary perspective view which shows the restraint plate temporary holding part of the restraint plate in the assembled battery which concerns on this embodiment. It is a fragmentary perspective view which shows the time when the side plate is temporarily held by the side plate temporary holding part of the restraint plate. It is a fragmentary sectional view which follows the IX-IX line of FIG. It is a fragmentary perspective view which shows the other example of a restraint board. It is a fragmentary perspective view which shows the other example of a restraint board. It is a perspective view which shows the time of temporarily hold | maintaining the side plate to the restraint plate. FIG. 6 is a perspective view showing a state where a restraint plate is temporarily held on the lower case 4. It is sectional drawing which follows the XIV-XIV line | wire of FIG. It is a fragmentary perspective view for demonstrating the temporary holding structure of the side plate in the assembled battery of a comparative example, (A) shows before temporary holding and (B) shows after temporary holding. It is a perspective view which shows the assembled battery which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the assembled battery which concerns on 2nd Embodiment. It is sectional drawing which follows the XVIII-XVIII line of FIG. It is a side view which shows the latching pin of the assembled battery which concerns on 2nd Embodiment. It is a partial expanded sectional view of the tip of the locking pin. It is a partial expanded sectional view which follows the XXI-XXI line of FIG. It is a partial expanded sectional view of the assembled battery which shows the time of a restraint plate latching with a lower case with a latching pin. It is a partial expanded sectional view which shows the modification of the assembled battery which concerns on 2nd Embodiment.

Explanation of symbols

1,60 batteries,
2 battery modules,
3 battery module group,
4,61 Lower case,
5,62 restraint plate,
9 housing,
10 flat battery (battery),
18 output terminals,
20 side plates,
21 Busbar,
22 Plate member,
23 Side plate fastening bolt,
30, 30 ', 30 "restraint plate temporary holding portion,
31, 66, 80 locking part,
32, 69, 82 locked part,
40, 40 ', 40 "side plate temporary holder,
63 Locking pin,
64 containment space,
65,83 hook part,
68 rotation suppressor,
70, 81 recess,
d Thickness,
L holding length,
W width,
X gap.

Claims (12)

A plurality of battery modules in which a plurality of electrically connected batteries are housed in a housing are stacked and placed on the lower case, and the stacked battery modules are held between the lower case and a restraining plate from the stacking direction. Assembled battery,
The restraint plate extends from the outer peripheral portion to the lower case, and has a restraint plate temporary holding portion in which a locking portion is formed at the tip.
The assembled battery according to claim 1, wherein the lower case includes a locked portion to which the locking portion of the restraining plate temporary holding portion is locked. The battery module is provided with positive and negative output terminals led in a direction perpendicular to the stacking direction,
The assembled battery has a side plate to which a plurality of bus bars that connect output terminals of different battery modules are fixed in order to electrically connect different battery modules.
The assembled battery according to claim 1, wherein a side plate temporary holding portion that holds both ends of the side plate in the battery module stacking direction is formed in the constraining plate temporary holding portion. The assembled battery according to claim 2 , wherein the side plate temporary holding unit holds the side plate so that the position of the side plate can be adjusted.   The recess according to claim 1, wherein a hook is formed on one of the locking portion and the locked portion, and a hook that engages with the recess is formed on the other. Assembled battery. A plurality of battery modules in which a plurality of electrically connected batteries are housed in a housing are stacked and placed on the lower case, and the stacked battery modules are held between the lower case and a restraining plate from the stacking direction. Assembled battery,
A locking pin that extends to the lower case and has a locking portion at the tip is fixed to the restraining plate,
The lower case may have a the engaged portion which the engaging portion of the locking pin is locked,
A concave portion is formed in the locked portion, and a hook that engages with the concave portion is formed in the locking portion,
The locking portion is accommodated in an accommodating space that penetrates the locking pin in the radial direction, and the hook of the locking portion is formed to project in pairs in both radial directions of the locking pin,
The locking portion is rotatably connected to the locking pin in the accommodating space, and extends in the axial direction of the locking pin between a pair of hooks of the locking portion. An assembled battery , wherein a rotation suppressing portion that suppresses rotation in contact with the inner wall of the housing space is formed when the portion rotates .   The assembled battery according to claim 5, wherein the locking pin passes through a through hole formed in the battery module.   A plurality of battery modules in which a plurality of electrically connected batteries are housed in a casing are stacked and placed on the lower case, and the stacked battery modules are sandwiched and held between the lower case and a restraining plate from the stacking direction. A method for manufacturing an assembled battery, comprising:
  The restraint plate and the lower case are secured by locking a restraint plate temporary holding portion extending from the outer peripheral portion of the restraint plate to the lower case and having a catch portion formed at the tip thereof on the latched portion formed on the lower case. After the battery module is temporarily held in between, the restraint plate and the lower case are fixed.   A side plate in which a plurality of bus bars for connecting output terminals of different battery modules to be electrically connected to each other for electrically connecting a plurality of battery modules mounted on the lower case is formed in the restraint plate temporary holding portion, and 8. The assembled battery according to claim 7, wherein the bus bar of the side plate and the output terminal of the battery module are connected after temporarily holding by the side plate temporary holding portion that holds both ends of the side plate in the battery module stacking direction. Production method.   The method of manufacturing an assembled battery according to claim 8, wherein the side plate is held by the side plate temporary holding portion so that the position of the side plate can be adjusted.   The set according to any one of claims 7 to 9, wherein a hook formed on the other is hooked on a recess formed on one of the locking portion and the locked portion. Battery manufacturing method.   A plurality of battery modules in which a plurality of electrically connected batteries are housed in a casing are stacked and placed on the lower case, and the stacked battery modules are sandwiched and held between the lower case and a restraining plate from the stacking direction. A method for manufacturing an assembled battery, comprising:
  The restraint plate and the lower case are secured by locking a latch pin fixed to the restraint plate and extending to the lower case and having a latch portion formed at the tip thereof to a latched portion formed on the lower case. Fixed,
  It is locked by hooking a hook formed on the locking portion to the recess formed on the locked portion,
  The locking portion is accommodated in an accommodating space that penetrates the locking pin in the radial direction, and the hook of the locking portion is formed to project in pairs in both radial directions of the locking pin,
  The locking portion is rotatably connected to the locking pin in the accommodating space, and extends in the axial direction of the locking pin between a pair of hooks of the locking portion. A method of manufacturing an assembled battery, comprising: forming a rotation suppressing portion that suppresses rotation by contacting an inner wall of the housing space when the portion rotates.   The method for manufacturing an assembled battery according to claim 11, wherein the locking pin is passed through a through hole formed in the battery module.

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