JP2006286602A - Lower case and battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lower case and a battery pack which can be assembled easily, regardless of the assembling man-hours. <P>SOLUTION: On the lower case and the battery pack for mounting and holding a plurality of battery modules, through holes, penetrating from a loading face 8 to a back face, are formed on a main body part of the lower case 2, and groove parts extending from the trough holes along the loading face 8 are formed on the loading face 8. Through bolts 20 are inserted from back face side of the through holes, and the through bolts 20 can be pulled down toward the loading face 8 side through the groove parts of the main body part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lower case for holding a battery module, and an assembled battery that holds a battery module using the lower case.

  A high output and high capacity assembled battery is made by electrically connecting a plurality of single cells in series and / or in parallel. In order to facilitate manufacture of the assembled battery, generally, a battery module in which a plurality of single cells are housed in a case is used as an assembly unit. In the battery module, a plurality of single cells are electrically connected within the case, and positive and negative output terminals are led out from the case. Then, an assembled battery is manufactured by electrically connecting a number of battery modules corresponding to the required output and capacity in series and / or in parallel.

  A plurality of the battery modules are fixed to the lower case forming the lower part of the case. Usually, the battery module is held in a predetermined position of the lower case, and bolts are inserted one by one to be fixed to the lower case (for example, Patent Document 1).

The battery module is a type of assembled battery in that it includes a plurality of electrically connected single cells, but in this specification, a unit unit for assembling an “assembled battery” A unit in which a single cell is housed in a case is referred to as a “battery module”.
JP 2001-229896 A

  However, when the bolts are fixed one by one as described above, there is a problem that it takes assembling man-hours. Further, when a plurality of battery modules are fixed with a single bolt, it is difficult to hold the battery modules so that the bolts pass.

  The present invention has been made to solve the problems associated with the above-described prior art, and an object thereof is to provide a lower case and an assembled battery that do not require assembling steps and are easy to assemble.

  The above object is achieved by the inventions described in (1) to (4) below.

  (1) A lower case for loading and holding a plurality of battery modules, a composite bolt in which a plurality of through bolts extend in the same direction from a long shaft portion, and a mounting surface on which the battery module is mounted A through hole penetrating from the mounting surface to the back surface is formed, and the same number of the through holes as the through bolts are provided to form a through hole group. The mounting surface is formed with a groove portion extending from the through hole along the mounting surface, a through bolt is inserted from the back side of the through hole, and the through bolt extends through the groove portion of the main body portion. The lower case is characterized in that the groove portion is provided so as to be able to pass through to the placement surface side.

  (2) An assembled battery having a lower case for loading and holding a plurality of battery modules, wherein the lower case includes a composite bolt in which a plurality of through bolts extend in the same direction from a long shaft portion, and the battery module A main body portion on which a mounting surface is provided, and a through hole penetrating from the mounting surface to the back surface is formed in the main body portion, and the same number of the through holes as the through bolts are provided. A through hole group is formed, and the mounting surface is formed with a groove extending from the through hole along the mounting surface, and a through bolt is inserted from the back side of the through hole. However, the battery pack is characterized in that the groove portion is provided to the placement surface side through the groove portion of the main body portion.

  (3) A lower case for loading and holding a plurality of battery modules, a main body provided with a mounting surface on which the battery modules are mounted, and arranged in a row on the main body. At least one rotating part that is rotatably connected to the main body with the direction of the axis as a central axis, and a through bolt that extends in a direction crossing the direction in which the rotating parts are arranged and is rotatably connected to each rotating part. A rotating shaft connected to each rotating portion through the rotating portions arranged in a row, and in a direction in which the rotating portion rotates with respect to the main body portion, The rotating means connected to the rotating shaft at the same time, the connecting means for switchably connecting to the fixed or rotatable state, and the through-bolts rotate to rotate the respective through bolts. On the axis of rotation Each through-bolts and is lower case, characterized in that it comprises a a rotation transmitting mechanism capable of switching the state of being released state, or the connection was ligated simultaneously.

  (4) A lower case for stacking and holding a plurality of battery modules, a main body provided with a mounting surface on which the battery modules are mounted, and arranged in a row on the main body. At least one rotating part that is rotatably connected to the main body with the direction of the axis as a central axis, and a through bolt that extends in a direction crossing the direction in which the rotating parts are arranged and is rotatably connected to each rotating part. A rotating shaft connected to each rotating portion through the rotating portions arranged in a row, and in the direction in which the rotating portion rotates relative to the main body portion, the rotating shaft The rotating means connected to the rotating shaft at the same time, the connecting means for switchably connecting to the fixed or rotatable state, and the through-bolts rotate to rotate the respective through bolts. Pair with rotating shaft Each through bolt Te is assembled battery characterized by having a a rotation transmitting mechanism capable of switching the state of being released state, or the connection was ligated simultaneously.

  According to the invention described in (1) above, since the battery module is inserted into the through bolt that is connected in advance to the main body of the lower case, the assembling work is easy and the number of assembling steps can be reduced. Further, since the through bolt can be tilted, the lower case can be transported and stored in a small space.

  According to the invention described in the above (2), since the battery module is inserted into the through bolt connected in advance to the main body of the lower case constituting the assembled battery, the assembling work is easy and the number of assembling steps can be reduced. Further, since the through bolt can be tilted, the lower case can be transported and stored in a small space.

  According to the invention described in (3) above, since the battery module is inserted into the through bolt that is connected in advance to the main body of the lower case, the assembling work is easy and the number of assembling steps can be reduced. Further, since the through bolt can be tilted, the lower case can be transported and stored in a small space.

  According to the invention described in (4) above, since the battery module is inserted into the through bolt that is connected in advance to the main body of the lower case constituting the assembled battery, the assembling work is easy and the number of assembling steps can be reduced. Further, since the through bolt can be tilted, the lower case can be transported and stored in a small space.

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

  1 is an overall perspective view showing the assembled battery according to the first embodiment, FIG. 2 is a plan view showing a main body portion of the lower case according to the first embodiment, and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is an enlarged perspective view of the main part of the main body of the lower case according to the first embodiment, and FIG. 5 is a plan view showing the composite bolt of the lower case according to the first embodiment.

  As shown in FIG. 1, in the assembled battery 1 according to the first embodiment of the present invention, a plurality of battery modules 3 are laminated on a plate-like lower case 2. The battery module 3 is a unit unit having a plurality of single cells therein, and each of the plurality of internal cells is electrically connected in series and / or in parallel and is connected from the output terminal 4 of the battery module 3 to a predetermined value. Current or voltage is output. The assembled battery 1 can obtain a desired current, voltage, or capacity by connecting a plurality of battery modules 3 in series or in parallel.

  In the lower case 2, three battery module groups 5 stacked in the vertical direction are arranged in four rows in the horizontal direction.

  As shown in FIGS. 2 to 5, the lower case 2 includes a main body portion 6 and a composite bolt 7 connected to the main body portion 6.

  The mounting surface 8 on which the battery module 3 of the main body 6 is mounted has an outer peripheral surface 9 that forms the outer peripheral portion of the mounting surface 8, and a concave surface 10 that is recessed from the outer peripheral portion inside the outer peripheral surface 9. is doing.

  A plurality of bolt guide portions 11 are provided at the step portion of the concave surface 10 with the outer peripheral surface 9 corresponding to the four corners of the battery module 3 to be placed. It penetrates.

  Therefore, the through holes 12 and the bolt guide portions 11 constitute two rows of parallel through hole groups 13 and bolt guide portion groups 14 arranged in the direction in which the battery module groups 5 are arranged.

  Each bolt guide portion 11 has an upper surface on the side in contact with the outer peripheral surface 9 that is the same height as the outer peripheral surface 9, and is formed with a height lower toward the concave surface 10 on the side opposite to the side in contact with the outer peripheral surface 9. Yes.

  The through-hole 12 is long in the extending direction of the through-hole group 13, and a groove portion 15 extending from one side of the extending direction of the through-hole 12 to the concave surface 10 is formed. The side where the groove 15 of the through hole 12 is provided is the same side in the same through hole group 13. Moreover, the side in which the groove part 15 is provided of the two through-hole groups 13 is a mutually reverse direction.

  In each bolt guide group 14, a shaft holding portion 16 formed higher than the concave surface 10 is formed between adjacent bolt guide portions 11.

  Two rows of receiving grooves 17 (receiving portions) are formed in the bolt guide portion 11 and the shaft holding portion 16 so as to communicate the through-hole group 13 from the back surface of the mounting surface 8. As shown in FIG. 3, a plurality of protrusions 18 are provided in the vicinity of the through hole 12 along the extending direction of the housing groove 17 on the inner surface of the housing groove 17.

  As shown in FIG. 5, the composite bolt 7 includes a shaft portion 19 and a plurality of through bolts 20 extending in parallel from the shaft portion 19 in the same direction. The through bolts 20 are provided at intervals corresponding to the holding holes 22 provided at the four corners of the battery module 3 placed on the lower case 2, and screw grooves 21 are formed at the end portions of the through bolts 20. ing.

  6 is a perspective view showing a state where the composite bolt is inserted into the main body, FIG. 7 is a partial cross-sectional view taken along the line VII-VII in FIG. 6, and FIG. 8 is a view showing movement of the composite bolt inserted into the main body. Yes, (A) is a perspective view when the composite bolt is made to stand upright on the main body, (B) is a perspective view when the composite bolt is brought down on the main body, and (C) is a standup of the composite bolt on the main body. It is a perspective view at the time of fixing.

  As shown in FIGS. 6 and 7, in the composite bolt 7, the through bolt 20 is inserted into the through hole 12 of the main body portion 6, the shaft portion 19 is accommodated in the accommodating groove 17, and is connected to the main body portion 6. Once the composite bolt 7 is pushed into the housing groove 17, the shaft portion 19 is held by the projection 18, and the composite bolt 7 is prevented from falling off from the main body portion 6. The protrusion 18 is preferably provided in the vicinity of the through-hole 12 where the composite bolt 7 is most susceptible to external force. However, the protrusion 18 may be provided in other parts, and if there are two or more in each receiving groove 17, the composite bolt 7 is composite. Since the bolt 7 can be held, the number is not limited as long as it is two or more.

  The shaft portion 19 housed in the housing groove 17 can slide along the extending direction of the housing groove 17 (the axial direction of the shaft portion 19), and as a result, as shown in FIGS. Thus, the through bolt 20 inserted in the through hole 12 can move from one side of the long through hole 12 to the other side.

  When the through-bolt 20 is on the side where the groove 15 of the through-hole 12 is provided, the through-bolt 20 has the main body portion with the shaft portion 19 as the center, as shown in FIGS. 6 can be rotated in a range from the vertical direction to the concave surface 10.

  When the through bolt 20 is on the side opposite to the groove portion 15 of the through hole 12, as shown in FIG. 8C, rotation of the through bolt 20 is suppressed by the through hole 12. Can be held upright in the vertical direction.

  Next, a method for stacking the battery module 3 on the lower case 2 according to the first embodiment will be described.

  9 is a perspective view when the composite bolt of the lower case according to the first embodiment is tilted to the main body, FIG. 10 is a perspective view when the battery module is stacked on the composite bolt of the lower case according to the first embodiment, FIG. FIG. 4 is a perspective view when the stacking of the battery modules on the lower case according to the first embodiment is completed.

  In the lower case 2, after the composite bolt 7 is connected to the main body 6, as shown in FIG. 9, the two composite bolts 7 are folded and stored so that the through bolt 20 contacts the concave surface 10 through the groove 15. Be transported. At this time, since the composite bolt 7 is folded and stored in the recessed surface 10 of the main body 6, the composite bolt 7 does not hinder storage and transportation, and a large amount of the lower case 2 can be stored in a space-saving manner. it can.

  When stacking the battery module 3 on the lower case 2, as shown in FIG. 10, two folded composite bolts 7 are raised vertically to the main body 6, and the through-bolt 20 is inserted into the groove of the through hole 12. Move to the opposite side of 15. Accordingly, the through bolt 20 is held upright in the vertical direction on the main body 6. The position of the through bolt 20 corresponds to the holding hole 22 of the battery module 3.

  Thereafter, the bolts 20 are inserted into the holding holes 22 of the battery module 3 to sequentially stack the battery modules 3. Between the battery modules 3 that overlap each other, a cylindrical collar 21 through which the through bolt 20 passes is provided in order to provide a cooling gap. The collar 21 is made of, for example, aluminum, and the surface is insulated.

  Since the two through-hole groups 13 of the main body 6 are opposite to each other at the position where the groove 15 is provided, the through-bolt 20 is moved after the folded through-bolt 20 is raised vertically to the main body 6. Is in the opposite direction. For this reason, after inserting the through bolt 20 into the holding hole 22 of the battery module 3, the movement of the composite bolt 7 in the extending direction of the shaft portion 19 can be suppressed. Thereby, the shift | offset | difference with respect to the main-body part 6 of the battery module 3 can be prevented.

  Such a structure in which the groove 15 is opposite in the two through-hole groups 13 can be easily realized at low cost by using the bolt guide portions 11 having the same shape in the two bolt guide groups 14. Further, when the bolt guide portion 11 having such a structure is used, when the through bolt 20 is stored in contact with the concave surface 10, the two through bolts 20 are alternately positioned, and the through bolts 20 are connected to each other. It does not overlap, and it also has the effect of saving space.

  After all the battery modules 3 are installed, as shown in FIG. 11, a restraining plate 23 covering all the battery module groups 5 is provided, and a nut 24 is fitted into the thread groove 21 at the end of the through bolt 20 from the upper part. All the battery modules 3 are fixed to the lower case 2.

  A control unit for controlling current and the like is placed on the upper portion of the restraint plate 23 (not shown), and an upper case (not shown) that covers the entire stacked battery module 3 and control unit is covered. The upper case and the lower case 2 are connected by a bolt or the like to form the assembled battery 1.

  Thus, in order to insert and laminate the composite bolt 7 previously connected to the main body 6 into the holding hole 22 of the battery module 3, for example, assembling rather than a method of fitting the bolts one by one after laminating the battery modules It does not take man-hours and is easy to work. In addition, it is possible to easily prevent displacement between the battery modules 3 when the battery modules 3 are stacked.

  Next, a second embodiment will be described.

  FIG. 12 is a plan view showing a lower case according to the second embodiment, FIG. 13 is an exploded perspective view of an enlarged main part of the lower case according to the second embodiment, and FIG. 14 is a rotation of the lower case according to the second embodiment. It is sectional drawing which shows a part, (A) shows the time when a rotation part and a rotating shaft are rotationally connected, (B) shows the time when a rotation part and a rotating shaft are connected non-rotatably. Note that the same members as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The lower case 25 according to the second embodiment has a main body portion 26 provided with a placement surface 27 on which the battery module 3 is placed, and a position corresponding to the holding hole 22 of the placed battery module 3. In addition, holes 28 arranged in two rows are formed.

  Each of the hole portions 28 is provided with a rotating portion 29 that is rotatable about the direction of the row in which the hole portions 28 are arranged as a central axis.

  Further, the lower case 25 has two rotating shafts 30 penetrating the rotating portion 29 for each row. A hollow portion 31 is formed inside the rotating portion 29, and the rotating shaft 30 passes through a pair of fixing holes 32 formed with the hollow portion 31 interposed therebetween. A pair of fixing grooves 33 extending in the axial direction of the rotating shaft 30 is formed on one inner wall of the fixing hole 32, and a pair of fixing grooves 33 are formed on the rotating shaft 30 corresponding to the shape of the fixing groove 33. A member 34 is formed.

  The rotating shaft 30 is fixed to the main body portion 26 so as to be rotatable and movable in the axial direction by a rotation holding member 35 provided in the vicinity of the rotating portion 29. The rotating shaft 30 is movable in the axial direction with respect to the rotating portion 29. Therefore, when the fixing member 34 is in the fixing hole 32 as shown in FIG. 14 (A), the cross section of the fixing hole 32 is non-circular. When the fixing member 34 moves from the fixing hole 32 and is in the hollow portion 31 as shown in FIG. 14B, the rotating portion 29 and the rotating shaft 30 are rotationally connected. Further, a driving side bevel gear 36 as a driving member is fixed to the rotary shaft 30 in each hollow portion 31.

  A through bolt 37 is rotatably connected to each rotating portion 29 so as to intersect the rotating shaft 30. A driven bevel gear 38 as a driven member is fixed to one end of the through bolt 37 on the rotating portion 29 side in the hollow portion 31 of the rotating portion 29, and a screw groove is formed on the other end. When the fixing member 34 moves from the fixing hole 32 and is in the hollow portion 31 as shown in FIG. 14B, the driven bevel gear 38 and the driving side bevel gear 36 are engaged with each other to serve as a rotation transmitting means.

  15 is an enlarged partial perspective view of the main part of the lower case for explaining before the through bolt stands upright from the main body, and FIG. 16 is an enlarged view of the main part of the lower case for explaining after the through bolt stands upright from the main body. It is a fragmentary perspective view.

  As shown in FIG. 15, the lower case 25 according to the second embodiment is conveyed in a state in which the through bolts 37 are folded and fit in the recessed surface 40 of the main body 26. Thereafter, the two rotating shafts 30 are rotated from the shaft end 41 of the rotating shaft 30 in a state where the respective fixing members 34 are fitted in the fixing grooves 33 of the corresponding fixing holes 32. Thereby, each rotating part 29 rotates with the rotating shaft 30, and each through bolt 37 connected to the rotating part 29 stands upright with respect to the main body part 26. In this way, the fixing member 34 and the fixing groove 33 serve as a connecting means for connecting the rotating shaft 30 and the respective rotating portions 29 at the same time so as to be switchable in a fixed or rotatable state.

  Next, the battery module 3 is placed on the main body 26 so that the through bolt 37 penetrates the holding hole 22 of the battery module 3, and the restraint plate 43 is disposed thereon. Unlike the restraint plate 23 of the first embodiment, the restraint plate 43 in the second embodiment has a nut 44 fixed to the restraint plate 43 by welding or the like. Instead of fixing the nut 44 integrally to the restraint plate 43, the nut 44 may be fitted non-rotatably to the restraint plate, or a tap may be formed on the restraint plate 43.

  Next, as shown in FIG. 16, the rotating shaft 30 is moved in the axial direction to move the fixing member 34 from the fixing groove 33 to the hollow portion 31, and the driving side bevel gear 36 is engaged with the driven side bevel gear 38. Thereafter, when the rotating shaft 30 is rotated, the fixing member 34 is disengaged from the fixing groove 33 and thus the rotating portion 29 does not rotate, but the driving side bevel gear 36 and the driven side bevel gear 38 are engaged with each other. The bolt 37 rotates. Thereby, all through bolts 37 connected to the respective rotary shafts 30 are screwed into the screw holes of the nut 44 at the same time, and the battery module 3 is fixed between the restraint plate 43 and the main body portion 26.

  In the second embodiment, the fixing member 34 and the fixing groove 33 as the rotating means can connect the rotating shaft 30 and the respective rotating portions 29 so that they can be switched to a fixed or rotatable state at the same time. By rotating the shaft 30, all the through bolts 37 arranged in the same row can be made upright at the same time, so that the number of assembling steps is not required and the operation is easy.

  Further, the driven bevel gear 38 and the drive side bevel gear 36 as the rotation transmitting means mesh in the hollow portions 31 of the respective rotating portions 29, thereby rotating all the through bolts 37 arranged in the same row at the same time. Since it can fasten simultaneously with respect to the fixed nut 44, an assembly man-hour is not taken and an operation | work is easy.

  Further, since the through-bolt 37 can be folded, the through-bolt 37 does not hinder storage and transportation, and a large number of lower cases 25 can be stored in a space-saving manner. Moreover, since the through bolts 37 connected in advance to the main body portion 26 are inserted into the holding holes 22 of the battery module 3, the number of assembling steps is not required and the operation is easy. In addition, it is possible to easily prevent displacement between the battery modules 3 when the battery modules 3 are stacked.

  Next, a third embodiment will be described.

  FIG. 17 is a view showing a state where the rotating part and the rotating shaft of the lower case according to the third embodiment are non-rotatably connected, and FIG. 17 (A) is a cross-sectional view in a plane perpendicular to the axial direction of the through bolt; B) is a cross-sectional view of the through-bolt in a plane parallel to the axial direction, and FIG. 18 is a view showing a state in which the rotating part and the rotating shaft of the lower case according to the third embodiment are rotationally connected. Is a sectional view in a plane perpendicular to the axial direction of the through bolt, and (B) is a sectional view in a plane parallel to the axial direction of the through bolt. Note that the same members as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The third embodiment differs from the second embodiment only in the rotation transmission means.

  As shown in FIGS. 17 and 18, the rotation transmission means of the third embodiment includes a worm gear 45 as a driving member fixed to the rotating shaft 30 and a worm wheel gear 46 as a driven member fixed to the through bolt 37. have. Accordingly, the rotating shaft 30 is moved in the axial direction from the state in which the fixing member 34 is fitted in the fixing groove 33 (see FIG. 17), the fixing member 34 is moved from the fixing groove 33 to the hollow portion 31, and the worm gear. 45 can be meshed with the worm wheel gear 46 (see FIG. 18). Thereby, the through-bolt 37 can be rotated by rotating the rotating shaft 30.

  Next, a fourth embodiment will be described.

  FIG. 19 is a view showing a state in which the rotating part and the rotating shaft of the lower case according to the fourth embodiment are non-rotatably connected, and FIG. 19A is a cross-sectional view in a plane perpendicular to the axial direction of the through bolt. B) is a cross-sectional view of the through-bolt in a plane parallel to the axial direction, and FIG. 20 is a view showing a state where the rotating part and the rotating shaft of the lower case according to the fourth embodiment are rotationally connected. Is a cross-sectional view in a plane perpendicular to the axial direction of the through-bolt, (B) is a cross-sectional view in a plane parallel to the axial direction of the through-bolt, and FIG. 21 shows the battery module placed on the lower case according to the fourth embodiment. FIG. 22 is a cross-sectional view taken along the line AA in FIG. 21, and FIG. 22 is a partial cross-sectional view in a plane parallel to the axial direction of the through bolt. Note that the same members as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The fourth embodiment differs from the second and third embodiments in rotation transmission means.

  As shown in FIGS. 19 and 20, the rotation transmission means of the fourth embodiment is fixed to the rotary shaft 30, and includes a drive member 53 in which a projecting portion 47 extending in the radial direction of the rotary shaft 30 is formed, and a through bolt 37. A helical spiral groove 48 that is fixed and has the through-bolt 37 as an axis is formed, and a driven member 54 into which the projecting portion 47 can be fitted is provided in the spiral groove 48. Therefore, the rotating shaft 30 is moved in the axial direction from the state in which the fixing member 34 is fitted in the fixing groove 33 (see FIG. 19), and the fixing member 34 is moved from the fixing groove 33 to the hollow portion 31 and driven. The protrusion 47 of the member 53 can be fitted into the spiral groove 48 of the driven member 54 (see FIG. 20). Thereby, the through-bolt 37 can be rotated by rotating the rotating shaft 30.

  In the rotation transmission means in the fourth embodiment, it is difficult to set the rotation angle of the through bolt 37 to be large. Therefore, in this embodiment, the battery module 3 is not fixed by the restraint plate as in the first to third embodiments, but another method is used. Each through bolt 37 of the lower case according to the fourth embodiment has battery stoppers 49 extending in pairs in a direction orthogonal to the axial direction of the through bolt 37 as shown in FIGS. 21 and 22. Three battery stoppers 49 are formed corresponding to the respective battery modules 3 to be inserted, and the sleeve 50 of each battery module 3 through which the through bolt 37 is inserted corresponds to the battery stopper 49. Thus, a space 51 is formed in which the battery stopper 49 can rotate as the through bolt 37 rotates.

  In the space 51, a step 52 having a predetermined length is formed at a position rotated 90 degrees from the position where the battery stopper 49 is inserted into the sleeve 50. Therefore, when the battery stopper 49 rotates 90 degrees, the battery stopper 49 rides on the stepped portion 52 and presses the battery module 3 toward the main body portion of the lower case, so that the battery module 3 can be fixed. It should be noted that the stepped portion 52 can be provided with a bar so that the battery stopper 49 does not return from the stepped portion 52, and the position of the stepped portion 52 is not limited to 90 degrees. Further, the number of battery stoppers 49 of each through bolt 37 is not limited to three for each battery module 3. For example, even when only one battery stopper 49 is provided in the uppermost battery module 3. The battery module 3 can be fixed. Further, as in the second and third embodiments, a restraint plate can be provided on the uppermost battery module 3, and the stepped portion 52 can be provided on the restraint plate.

  Moreover, the method using this level | step-difference part 52 can also be applied to 2nd and 3rd embodiment.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, in the first embodiment, the number of stacking battery modules 3 and the number of battery module groups 5 may be different. Further, when the two folded composite bolts 7 are raised vertically to the main body portion 6 and the through bolt 20 is moved to the side opposite to the groove portion 15 of the through hole 12, the through bolt 20 is again inserted into the through hole 12. A stop portion such as a protrusion may be provided in the through hole 12 so as not to return to the side where the groove portion 15 is provided. Moreover, the composite bolt 7 may be one instead of two.

1 is an overall perspective view showing an assembled battery according to a first embodiment. It is a top view which shows the main-body part of the lower case which concerns on 1st Embodiment. It is sectional drawing which follows the III-III line of FIG. It is the perspective view which expanded the principal part of the main-body part of the lower case which concerns on 1st Embodiment. It is a top view which shows the composite bolt of the lower case which concerns on 1st Embodiment. It is a perspective view which shows the time of inserting a compound volt | bolt in a main-body part. It is a fragmentary sectional view which follows the VII-VII line of FIG. It is a figure which shows the movement of the composite bolt inserted in the main-body part, (A) is a perspective view at the time of making a composite bolt stand upright to a main-body part, (B) is a perspective view at the time of falling a composite bolt to a main-body part. (C) is a perspective view when the composite bolt is fixed upright on the main body. It is a perspective view when the composite bolt of the lower case which concerns on 1st Embodiment is fallen to the main-body part. It is a perspective view at the time of laminating | stacking a battery module on the composite bolt of the lower case which concerns on 1st Embodiment. It is a perspective view when lamination | stacking of the battery module to the lower case which concerns on 1st Embodiment is completed. It is a top view which shows the lower case which concerns on 2nd Embodiment. It is the disassembled perspective view which expanded the principal part of the lower case which concerns on 2nd Embodiment. It is sectional drawing which shows the rotation part of the lower case which concerns on 2nd Embodiment, (A) shows the time when a rotation part and a rotating shaft are rotationally connected, (B) does not rotate a rotation part and a rotating shaft. When connected. It is an enlarged partial perspective view of the principal part of the lower case for demonstrating before a through bolt stands upright from a main-body part. It is an expanded partial perspective view of the principal part of the lower case for demonstrating after a through bolt has stood upright from the main-body part. It is a figure which shows the time of the rotation part and rotating shaft of the lower case which concern on 3rd Embodiment being connected non-rotatably, (A) is sectional drawing in a surface perpendicular | vertical to the axial direction of a through bolt, (B) It is sectional drawing in the surface parallel to the axial direction of a through bolt. It is a figure which shows the time of the rotational part and rotating shaft of the lower case which concern on 3rd Embodiment having been rotationally connected, (A) is sectional drawing in a surface perpendicular | vertical to the axial direction of a through bolt, (B) is through. It is sectional drawing in the surface parallel to the axial direction of a volt | bolt. It is a figure which shows the time of the rotation part of a lower case which concerns on 4th Embodiment, and a rotating shaft being connected non-rotatably, (A) is sectional drawing in a surface perpendicular | vertical to the axial direction of a through bolt, (B) It is sectional drawing in the surface parallel to the axial direction of a through bolt. It is a figure which shows the time of the rotational part and rotary shaft of the lower case which concern on 4th Embodiment being rotationally connected, (A) is sectional drawing in a surface perpendicular | vertical to the axial direction of a through-bolt, (B) is through. It is sectional drawing in the surface parallel to the axial direction of a volt | bolt. It is a fragmentary sectional view in the plane parallel to the axial direction of a through bolt which shows a time when a battery module is mounted in a lower case concerning a 4th embodiment. It is sectional drawing which follows the AA line of FIG.

Explanation of symbols

1 battery pack,
2,25 lower case,
3 Battery module,
4 output terminals,
5 Battery module group,
6,26 body part,
7 Composite bolt,
8,27 Placement surface,
9 outer peripheral surface,
10,40 concave surface,
11 Bolt guide,
12 through-holes,
13 Throughhole County,
14 Bolt Guide Department,
15 groove,
16 shaft holder,
17 receiving groove (receiving portion),
18 protrusions,
19 shaft,
20, 37 through bolts,
22 retaining holes,
28 holes,
29 Rotating part,
30 rotation axis,
31 hollow part,
32 fixing holes,
33 fixing groove,
34 fixing member,
35 rotation holding member,
36 drive-side bevel gear (drive member),
38 bolt side bevel gear (driven member),
43 Restraint plate,
45 Worm gear (drive member),
46 Worm wheel gear (driven member),
47 Protrusion,
48 spiral groove,
49 Battery stop,
51 space,
53 drive member,
54 Follower member.

Claims (21)

A lower case for loading and holding a plurality of battery modules,
A composite bolt in which a plurality of through bolts extend in the same direction from a long shaft portion;
A main body provided with a mounting surface on which the battery module is mounted;
In the main body portion, a through-hole penetrating from the placement surface to the back surface is formed, and the same number of the through-holes as the through-bolts are provided to form a through-hole group. A groove extending along the mounting surface is formed from
A lower case, wherein a through bolt is inserted from the back surface side of the through hole, and the through bolt is provided with the groove portion through the groove portion of the main body portion to the mounting surface side. The through hole is long in the extending direction of the shaft portion, and the groove portion is formed from one side of the long through hole,
The through bolt inserted into the through hole is slidable in the extending direction of the shaft portion, and the position on the other side of the through hole is the position of the holding hole through which the through bolt of the battery module is inserted. The lower case according to claim 1, which corresponds to: The main body portion is provided with two rows of through-hole groups into which two composite bolts can be inserted,
3. The lower case according to claim 2, wherein one side of the through hole on which the groove portion is provided is in a reverse direction in two rows of through hole groups.   4. A housing part for housing the shaft portion of the composite bolt is formed on the back surface of the main body part, and at least one protrusion is formed on the housing part. The lower case according to any one of claims. A battery pack having a lower case for loading and holding a plurality of battery modules,
The lower case is
A composite bolt in which a plurality of through bolts extend in the same direction from a long shaft portion;
A main body provided with a mounting surface on which the battery module is mounted;
In the main body portion, a through-hole penetrating from the placement surface to the back surface is formed, and the same number of the through-holes as the through-bolts are provided to form a through-hole group. A groove extending along the mounting surface is formed from
A assembled battery, wherein a through bolt is inserted from the back surface side of the through hole, and the through bolt is provided with the groove portion through the groove portion of the main body portion to the mounting surface side. The through hole is long in the extending direction of the shaft portion, and the groove portion is formed from one side of the long through hole,
The through bolt inserted into the through hole is slidable in the extending direction of the shaft portion, and the position on the other side of the through hole is the position of the holding hole through which the through bolt of the battery module is inserted. The assembled battery according to claim 5, which corresponds to: The main body portion is provided with two rows of through-hole groups into which two composite bolts can be inserted,
The assembled battery according to claim 6, wherein one side of the through hole where the groove portion is provided is in a reverse direction in two rows of through hole groups.   An accommodation portion for accommodating the shaft portion of the composite bolt is formed on the rear surface of the main body portion, and the accommodation portion is formed with at least one protrusion prevention pin. Item 8. The assembled battery according to any one of Items 5 to 7. A lower case for loading and holding a plurality of battery modules,
A main body provided with a mounting surface on which the battery module is mounted;
Arranged in a row in the main body, and at least one rotating portion coupled to the main body so as to be rotatable about the direction of the row as a central axis;
A through bolt extending in a direction intersecting the direction in which the rotating parts are arranged and rotatably connected to each rotating part;
A rotating shaft connected to each rotating part through the rotating parts arranged in a row; and
Connecting means for connecting the respective rotating parts connected to the rotating shaft to the rotating shaft at the same time in a fixed or rotatable state in the direction in which the rotating part rotates with respect to the main body. When,
Rotation transmitting means that can be switched to a state in which the through bolts are simultaneously connected to the rotary shaft or a state in which the connection is released so that the through bolts rotate as the rotary shaft rotates. When,
A lower case characterized by comprising: The connecting means includes a non-circular fixing hole that is formed in each of the rotating portions and to which the rotating shaft is pivotally attached;
A fixing member formed on the rotating shaft and having a shape corresponding to each of the fixing holes;
The lower case according to claim 9, wherein the fixing members are simultaneously inserted into and removed from the fixing holes corresponding to the fixing members by moving the rotating shaft in the axial direction. . The rotation transmitting means includes a driven member fixed to an end portion of each through bolt connected to the rotating portion, and a driving member fixed to the rotating shaft corresponding to each driven member. Have
11. The respective driving members are simultaneously connected to or separated from the corresponding driven members corresponding to the respective driving members by moving the rotating shaft in the axial direction. Lower case.   The lower case according to claim 11, wherein the driven member and the driving member are gears.   12. The driven member includes a spiral groove having a center axis of the through bolt as an axis, and the drive member includes a protrusion that can be fitted into the spiral groove. Lower case as described in. A lower case for loading and holding a plurality of battery modules,
A main body provided with a mounting surface on which the battery module is mounted;
Arranged in a row in the main body, and at least one rotating portion coupled to the main body so as to be rotatable about the direction of the row as a central axis;
A through bolt extending in a direction intersecting the direction in which the rotating parts are arranged and rotatably connected to each rotating part;
A rotating shaft connected to each rotating part through the rotating parts arranged in a row; and
Connecting means for connecting the respective rotating parts connected to the rotating shaft to the rotating shaft at the same time in a fixed or rotatable state in the direction in which the rotating part rotates with respect to the main body. When,
Rotation transmitting means that can be switched to a state in which the through bolts are simultaneously connected to the rotary shaft or a state in which the connection is released so that the through bolts rotate as the rotary shaft rotates. When,
An assembled battery comprising: The connecting means includes a non-circular fixing hole that is formed in each of the rotating portions and to which the rotating shaft is pivotally attached;
A fixing member formed on the rotating shaft and having a shape corresponding to each of the fixing holes;
The group according to claim 14, wherein the fixing members are simultaneously inserted into and removed from the fixing holes corresponding to the fixing members by moving the rotating shaft in the axial direction. battery. The rotating means includes a driven member fixed to an end portion of each through bolt connected to the rotating portion, a driving member fixed to the rotating shaft corresponding to the respective driven member, Have
16. The respective driving members are simultaneously connected to or separated from the corresponding driven members corresponding to the driving members by moving the rotating shaft in the axial direction. Battery pack.   The assembled battery according to claim 16, wherein the driven member and the driving member are gears.   The driven member has a spiral spiral groove having a center axis of the through-bolt as an axis, and the drive member has a protrusion that can be fitted in the spiral groove. The assembled battery described in 1.   A constraining plate is provided on the opposite side of the main body of the battery module placed on the main body, and the constraining plate has an end on the opposite side to the side connected to the rotating portion of the through bolt. The assembled battery according to any one of claims 14 to 18, wherein a nut that engages with the formed thread groove is fixedly provided.   A constraining plate is provided on the opposite side of the main body of the battery module placed on the main body, and the constraining plate is formed at the end of the through bolt that is opposite to the side connected to the rotating portion. The assembled battery according to any one of claims 14 to 19, wherein a screw hole to be screwed into the screw groove is fixedly provided. The through bolt is formed with at least one battery stopper extending in a direction intersecting with the axis of the through bolt,
The through bolt can be inserted into the battery module or a restraining plate provided on the opposite side of the main body of the battery module placed on the main body corresponding to the shape of the projecting portion of the through bolt. The space according to any one of claims 14 to 19, wherein a space portion is formed in which the through bolt can rotate around the axis at a predetermined position where the through bolt is inserted. battery.

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