JP2017033751A - Battery pack and battery module replacement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack having a structure which allows for efficient replacement of any one of a plurality of battery modules to be mounted.SOLUTION: A battery pack 1 includes a plurality of battery modules 2, a tray 32, a support 33, a bracket 4 and a bolt 5. The bracket 4 has a through hole 43 in which a female screw (second female screw S2) having an inside diameter, not in contact with the male screw T1 of the bolt 5, is formed. The support 33 has a fixing hole 331 in which a female screw (first female screw S1) fitting the male screw T1 of the bolt 5 is formed. The through hole 43 is arranged coaxially with the fixing hole 331. The bolt 5 is screwed in the fixing hole 331 through the through hole 43.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a battery pack incorporating a plurality of battery modules and a battery module replacement method.

  A battery is mounted to supply power to the electric system of the vehicle. According to the battery holding device described in Patent Document 1, the battery holding member having the battery tray on which the battery is placed and the holding surface on which the battery tray is placed is provided, and when removing the battery, without interfering with surrounding devices. The battery can be removed by inclining.

  Moreover, in the electric vehicle, a driving battery for supplying electric power to the driving motor is mounted. The vehicle battery pack described in Patent Document 2 has a plurality of battery modules in a case installed at the lower part of the vehicle body. Each battery module is composed of a plurality of battery cells. The case includes a tray on which the battery module is arranged and a cover that is attached to the tray so as to cover the battery module. Each battery module is fixed to a boss provided in the tray via a bracket.

JP 2012-201318 A Japanese Patent Laying-Open No. 2015-043336

  The battery cell of a battery or a battery pack needs to be replaced due to deterioration over time. In that case, if it has a structure like patent document 1, what is necessary is just to take out a battery and replace | exchange for a new thing as it is. However, in the case of a battery pack as in Patent Document 2, a deteriorated battery cell cannot be taken out and replaced alone. Also, not all battery cells in the battery pack are subject to replacement at the same time. That is, when the battery cell needs to be replaced in normal maintenance or the like, the minimum unit to be replaced is the battery module. At this time, the battery pack has an increased internal loading density in order to reduce the occupied volume, that is, a plurality of battery modules are arranged close to each other. For this reason, in order to secure a space for the operator to insert his / her hand when removing the battery module to be replaced, the battery module next to the battery module and the battery module next to the battery module should be disassembled and shifted or held tilted. Work is required, and workability is poor.

  Accordingly, the present invention provides a battery pack having a structure capable of efficiently replacing any one of a plurality of mounted battery modules, and a battery module replacement method for replacing at least one battery module in the battery pack. To do.

  A battery pack according to an embodiment of the present invention includes a plurality of battery modules, a tray, a support portion, a bracket, and a bolt. The plurality of battery modules are arranged side by side. The tray supports the plurality of battery modules. The support part is formed in the tray corresponding to each of the battery modules. The bracket is bridged from the battery module to the top of the support portion. The bolt fixes the bracket to the support portion. The bracket has a through hole in which a female screw portion having an inner diameter that does not contact the male screw portion of the bolt is formed. The support portion has a fixing hole in which a female screw portion that matches the male screw portion of the bolt is formed. The through hole is arranged coaxially with the fixing hole. The bolt is screwed into the fixing hole while passing through the through hole.

  At this time, the brackets are arranged in a pair symmetrical with respect to the center line passing vertically through the center of gravity of the battery module, and the through holes are provided at positions where the line segment connecting the centers of the through holes is offset with respect to the center line. It is also preferable. Moreover, it is also preferable that the brackets are arranged in a pair at positions that are symmetrical to the center line that passes vertically through the center of gravity of the battery module and that are lower than the center of gravity along the center line.

  The battery module replacement method according to the present invention is a battery module replacement method for replacing at least one battery module of a battery pack. The battery pack includes a plurality of battery modules, a tray, a support portion, a bracket, and a bolt. The plurality of battery modules are arranged side by side. The tray supports a plurality of battery modules. The support portion is formed in the tray corresponding to each of the battery modules, and a fixing hole in which the first female screw portion is formed is opened at the top. In the bracket, a second female screw portion having an inner diameter larger than the valley diameter of the first female screw portion is formed in a through hole extending from the battery module to the top of the support portion and coaxially disposed in the fixing hole. ing. The bolt has a male screw portion that matches the first female screw portion, and is screwed into the fixing hole while being passed through the through hole, and fixes the bracket to the support portion. In this battery module replacement method, the bolt is removed from the fixing hole of the support portion corresponding to the battery module to be replaced, and the jack bolt that fits the second female screw portion is attached to the through hole from above, and this jack bolt Tilt the battery module by screwing

  At this time, the brackets are arranged in a pair symmetrical with respect to the center line passing vertically through the center of gravity of the battery module, and the through holes are positioned at positions where the line segments connecting the centers of the respective through holes are offset with respect to the center line. In the case of having the battery module, the battery module to be replaced is tilted in the direction opposite to the direction in which the through hole is offset with respect to the center line by screwing the jack bolt into the through hole.

  In addition, when the bracket has a pair of through holes arranged symmetrically with respect to the center line passing vertically through the center of gravity of the battery module and at a position lower than the center of gravity along the center line, The battery module is tilted by screwing it into the through hole and pushing the battery module in the direction in which it is desired to tilt.

  Further, when another battery module is arranged on the side on which the replacement target battery module is tilted, the other battery module is tilted in the same manner as the replacement target battery module before the replacement target battery module is tilted.

  According to the battery pack of the present invention, the bracket extending from the battery module to the tray has the second female screw portion having a diameter larger than the valley diameter of the first female screw portion formed on the support portion of the tray. A formed through hole is provided. Therefore, it is possible to fix the bracket to the support portion by screwing a bolt having a male screw portion suitable for the first female screw portion of the fixing hole through the through hole. It can also be used for holding a battery module in an inclined state by screwing a jack bolt that fits into the second female screw portion.

  Further, according to the battery module replacement method of the present invention for replacing at least one battery module in the battery pack, the bolt is removed from the fixing hole in which the first female screw portion is formed, and the first female screw portion The battery pack is tilted by screwing a jack bolt that fits into the second female screw portion into the through hole in which the second female screw portion having an inner diameter larger than the valley diameter is formed. Since it can hold | maintain, in the operation | work which replaces any one of a battery module, an operation | work can be performed efficiently.

The perspective view of the battery pack of 1st Embodiment which concerns on this invention. The perspective view of the three battery modules of FIG. The disassembled perspective view which removed the battery module of FIG. 2 from the support part. The side view which inclined two battery modules of FIG. 2 to the terminal side. The perspective view of the battery module of the battery pack of 2nd Embodiment which concerns on this invention. The top view of the battery module of FIG. The side view which arranged three battery modules of FIG. The side view which inclined two battery modules of FIG. 7 to the terminal side. The side view of the battery module of the battery pack of 3rd Embodiment which concerns on this invention. The side view which inclined two battery modules of FIG. 9 to the terminal side. The perspective view of the battery module of the battery pack of 4th Embodiment which concerns on this invention. The disassembled perspective view which removed the battery module of FIG. 11 from the support part. The side view which tilted one of the battery modules of FIG. 11 to the opposite side to a terminal. The side view which inclined one of the battery modules of FIG. 11 to the terminal side. The perspective view of the battery module of the battery pack of 5th Embodiment which concerns on this invention. The top view of the battery module of FIG. The side view which arranged three battery modules of FIG. The side view which inclined two battery modules of FIG. 17 to the terminal side. The perspective view of the battery module of the battery pack of 6th Embodiment which concerns on this invention. The perspective view of the battery module of the 7th implementation type | system | group other battery pack which concerns on this invention. The top view of the battery module of FIG. The side view seen from the support part side of the battery module of FIG. The disassembled perspective view which removed the battery module of FIG. 22 from the support part. FIG. 21 is a side view in which one of the battery modules in FIG. 20 is tilted to the terminal side and the other to the opposite side.

  A battery pack 1 according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing a state in which a cover 31 of a case 3 is removed from a tray 32 so that a plurality of battery modules 2 can be seen, which is a battery pack 1 mounted on an electric vehicle. The battery module 2 is formed in a rectangular parallelepiped shape including long sides, and further stores a plurality of battery cells therein. A plurality of battery modules 2 are arranged side by side in the direction across the long side, five in FIG. In this specification, for convenience of explanation, the cover 31 side is defined as “upper”, the tray 32 side is defined as “lower”, the direction along the long side is defined as “X”, and the direction crossing the long side is defined as “Y”.

  The tray 32 has a plurality of battery modules 2 arranged in a direction crossing the long side (Y direction) placed on the storage unit. Each battery module 2 is fixed to the support portion 33 of the tray 32 with the bolt 5 via the bracket 4. In the case of FIG. 1, two sets of battery modules 2 arranged in a direction crossing the long side (Y direction) are stored in two sets along the long side (X direction). In addition to the control unit that controls charging and discharging of these battery modules 2, a battery module other than the battery module 2 shown in FIG. A cooling device or the like for adjusting the temperature is stored.

  Each battery module 2 has electrode terminals 21 </ b> A and 21 </ b> B facing one side of the battery modules 2 adjacent to the corner near the cover 31. In the battery module 2 housed in the battery pack 1, the electrode terminals 21 </ b> A and 21 </ b> B are connected in series by the bus bar 6. Except for the bus bars extending from the battery modules 2 positioned at both ends of the battery modules 2 arranged in the Y direction, the bus bar 6 extends from the electrode terminal 21A on one side in the X direction along the long side as shown in FIG. It is connected to the electrode terminal 21B of the battery module 2 across the upper part of the adjacent battery module 2 at a position where it does not interfere with the electrode terminal 21B.

  The battery module 2 is fixed to a support portion 33 formed on the tray 32. In FIG. 2, three battery modules 2 and supporting portions 33 corresponding to the three battery modules 2 are extracted and illustrated for easy understanding. The support portion 33 is disposed to face the side portion 22 of the battery module 2 located at both ends of the long side, and as shown in FIG. 3, the fixing hole 331 in which the first female screw portion S1 is formed is formed. The top 332 opens. In addition, the support part 33 may be integrally formed over the bottom part and side wall of the tray 32 so that it may protrude inside from the inner peripheral surface of the side wall of the tray 32, and may be erected from the bottom part. .

  As shown in FIG. 2, the brackets 4 are attached in pairs to the side portions 22 located at both ends of the long side of the battery module 2, and are bridged from the battery module 2 to the top portion 332 of the support portion 33. In this embodiment, the bracket 4 is arrange | positioned at a pair symmetrical with respect to the centerline A which passes along the gravity center 20 of the battery module 2 perpendicularly. The bracket 4 includes a base portion 41, a holding portion 42, and a through hole 43. The base 41 is along the side part 22 of the battery module 2 and is fixed by a bolt 5 as a fastener. When a stud bolt is provided on the battery module 2 side, a bolt hole is provided in the base 41 and fixed with a nut.

  As shown in FIG. 2, the holding portion 42 extends so as to cover the top portion 332 of the support portion 33 of the battery module 2. The holding part 42 is arrange | positioned in the position lower than the gravity center 20 of the battery module 2, as shown in FIG. Therefore, the top portion 332 of the support portion 33 is also provided at a position lower than the center of gravity 20 of the battery module 2. As shown in FIG. 3, the through hole 43 is formed with a second female screw portion S <b> 2 having an inner diameter larger than the valley diameter of the first female screw portion S <b> 1 formed in the fixing hole 331. As shown in FIG. 4, in the present embodiment, the through hole 43 is arranged coaxially with the fixing hole 331.

  The bolt 5 has a male screw T1 that matches the first female screw S1, is screwed into the fixing hole 331 with at least a part of the holding portion 42 interposed therebetween, and the battery module 2 is supported by the support portion 33 of the tray 32. To fix. In the case of this embodiment, as shown in FIG. 3, the through hole 43 is arranged coaxially with the fixing hole 331. The bolt 5 has a male screw T1 that fits the first female screw S1, and the through hole 43 of the bracket 4 has a second female inner diameter larger than the mountain diameter of the male screw T1 of the bolt 5. A screw S2 is formed. That is, a female screw portion S2 having an inner diameter that does not contact the male screw portion T1 of the bolt 5 is formed in the through hole 43. Accordingly, the bolt 5 is screwed into the fixing hole 331 while being passed through the through hole 43, and fixes the bracket 4 to the top portion 332 of the support portion 33. That is, the through hole 43 of the bracket 4 is used as a bolt hole.

  In the battery pack 1 configured as described above, it may be necessary to replace at least one of the built-in battery modules 2. At this time, the method for replacing the battery module 2 in the battery pack 1 of the present embodiment can be performed by the following procedure. First, when the battery module 2 to be replaced is located on the outermost side in the Y direction in FIG. 1, the bus bar 6 is removed from the electrode terminals 21 </ b> A and 21 </ b> B of the battery module 2, and the battery module 2 is further supported by the support portion 33. Remove the bolt 5 fixed to

  At this time, when it is necessary to secure a working space between the adjacent battery modules 2 in order to remove the connected bus bars 6 with respect to the other adjacent battery modules 2, FIG. As shown, a jack bolt 7 having a male screw portion T2 that fits the second female screw portion S2 of the through hole 43 of the bracket 4 is attached to the through hole 43 from above. Since the jack bolt 7 has a larger shaft diameter than the first female screw portion S1 of the fixing hole 331 of the support portion 33, the jack bolt 7 is screwed into the through hole 43 of the bracket 4 without being screwed into the fixing hole 331. . The jack bolt 7 lifts the battery module 2 from the support portion 33 via the bracket 4 when the tip abuts against the top portion 332 of the support portion 33. In addition, as shown in FIG. 4, it is good for the front-end | tip of the jack volt | bolt 7 to be rounded so that the 1st internal thread part S1 of the fixing hole 331 may not be damaged. In the case of this embodiment, the holding part 42 of the bracket 4 provided with the through hole 43 is lower than the position of the center of gravity 20 of the battery module 2 and is symmetrical with respect to the center line A passing through the center of gravity 20 vertically. The through hole 43 is arranged at the position. Therefore, when the jack bolt 7 is screwed into the through-hole 43 and the battery module 2 is lifted by the jack bolt 7, it is opposite to the direction in which it is desired to tilt in the Y direction across the long side, i. By pushing the battery module 2 to the side, the battery module is tilted. In the case of this embodiment, as shown in FIG. 4, the battery module is tilted to the side where the electrode terminals 21A and 21B of the battery module 2 are arranged.

  Further, when the battery module 2 to be exchanged is the battery module 2 other than the outermost side in the Y direction in FIG. 1, that is, at least one inside battery module 2, the cables such as the bus bar 6 and other sensors are removed. Therefore, it is necessary to incline the other battery modules 2 arranged in the Y direction first in order to secure a working space for the above. Specifically, as shown in FIG. 4, when another battery module 2 is arranged on the side where the battery module 2 to be replaced is tilted, it is arranged next to the battery module 2 to be exchanged before tilting. The other battery module 2 is tilted in the same manner as the battery module 2 to be replaced described above is tilted. Therefore, when two battery modules 2 to be replaced are arranged inward in the Y direction, the outermost battery module 2 is tilted, the next inner battery module 2 is tilted, and finally the replacement target battery module 2 is tilted. The battery module 2 is tilted. The bus bars 6 connecting the adjacent battery modules 2 are removed as appropriate when the battery modules 2 are tilted.

  FIG. 4 shows a state where the two battery modules 2 are tilted. The center of gravity 20 of the battery module 2 is located on the surface along the center line of the fixing hole 331 and the bolt 5 screwed into the fixing hole 331 when the battery module 2 is fixed to the support portion 33. In the tilted state, the battery module 2 is stabilized in the tilted state shown in FIG. 4 because the battery module 2 is out of the plane along the center line of the fixing hole 331. Accordingly, the next operation can be performed with the tilted battery module 2 as it is, and the workability is also good. In order to restore the tilted battery module to its original state, the jack bolt 7 may be rotated upward. Further, the jack bolt 7 is also attached to the replaced battery module 2 in the through hole 43 of the bracket 4, placed on the tray 32, and after the bus bar 6 and the sensor cables are restored, the jack bolt 7 Remove.

  In FIG. 4, the battery module 2 is tilted toward the electrode terminals 21 </ b> A and 21 </ b> B. However, in the configuration of the present embodiment, the battery module 2 is tilted to the side opposite to the electrode terminals 21 </ b> A and 21 </ b> B. You can also. A so-called “eye bolt” in which a ring is formed on the head of the bolt may be used as the jack bolt 7 so that the battery module 2 to be replaced can be lifted by a lifting device such as a crane. In that case, a sufficiently long eyebolt is employed so that the ring is positioned higher than the center of gravity 20 of the battery module 2.

  The battery pack 1 of the second to seventh embodiments will be described below. In the second to seventh embodiments, configurations having the same functions as those of the battery pack 1 of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is as follows. The description of one embodiment is taken into consideration. Further, since the overall configuration of the battery pack 1 is the same as the structure described in the first embodiment, description of the structure other than the support portion in the second to seventh embodiments is omitted.

  The battery pack 1 of 2nd Embodiment is demonstrated with reference to FIGS. In the battery pack 1 of the second embodiment, as shown in FIGS. 5, 6, and 7, the positions of the through holes 43 of the bracket 4 of the battery module 2 and the positions of the fixing holes 331 of the support portion 33 associated therewith are the first. This is different from the first embodiment. The through hole 43 is positioned so that the line segment B connecting the centers of the through holes 43 of the respective brackets 4 is offset by the width M in the Y direction with respect to the center line A passing vertically through the center of gravity of the battery module 2. Is provided. In the case of the second embodiment, the bracket 4 and the support portion 33 are offset by a width M to the opposite side in the Y direction with respect to the electrode terminals 21A and 21B of the battery module 2.

  Similar to the first embodiment, the through hole 43 provided in the bracket 4 has a second female inner diameter larger than the valley diameter of the first female screw portion S1 formed in the fixing hole 331 of the support portion 33. A screw portion S2 is provided. In other words, the through hole 43 has an inner diameter such that the male screw portion T1 of the bolt 5 that matches the first female screw portion S1 of the fixing hole 331 does not come into contact therewith. This through hole 43 is arranged coaxially with respect to the fixing hole 331, and is used as a bolt hole through which the bolt 5 provided with the male screw portion T1 adapted to the first female screw portion S1 is passed. The battery module 2 is fixed to the tray 32 by screwing the bolt 5 into the fixing hole 331 of the support portion 33. The holding portion 42 of the bracket 4 and the top portion 332 of the support portion 33 with which the holding portion 42 abuts are disposed at a position lower than the center of gravity 20 of the battery module 2.

  In the battery pack 1 of the second embodiment configured as described above, when it is necessary to replace at least one of the plurality of battery modules 2, cables such as the bus bar 6 and other sensors are disconnected. Therefore, it is necessary to secure a working space between the adjacent battery modules 2. In such a case, similarly to the first embodiment, the bolt 5 that fixes the bracket 4 to the support portion 33 is removed, and the male screw portion T2 that matches the second female screw portion S2 of the through hole 43 is provided. The jack bolt 7 is screwed into the through hole 43.

  In the case of this embodiment, the through hole 43 is offset by a width M in the Y direction across the long side with respect to the center of gravity 20 of the battery module 2, specifically, on the side opposite to the side where the electrode terminals 21 </ b> A and 21 </ b> B are provided. Therefore, just by screwing the jack bolt 7, the battery module 2 is inclined to the side opposite to the side where the through hole 43 is offset by the width M, that is, the electrode terminals 21A and 21B as shown in FIG. . Since the battery module 2 always tilts to the side opposite to the side where the through hole 43 is offset by the width M, the workability is good.

  In addition, when it is desired to incline the battery module 2 to the opposite side to the electrode terminals 21A and 21B, that is, the battery module 2 arranged in the Y direction is positioned on the outermost side on the opposite side of the electrode terminals 21A and 21B. When the battery module 2 or the subsequent battery module 2 is tilted to the opposite side with respect to the electrode terminals 21A and 21B, the through hole 43 of the bracket 4 may be offset with the support portion 33 toward the electrode terminals 21A and 21B. .

  The battery pack 1 of 3rd Embodiment is demonstrated with reference to FIG.9 and FIG.10. In the battery pack 1 of the third embodiment, as shown in FIGS. 9 and 10, the position of the holding portion 42 of the bracket 4 of the battery module 2 and the position of the top portion 332 of the support portion 33 associated therewith are as described in the first embodiment. This is different from the case of the second embodiment. The point that the through hole 43 is offset by the width M in the Y direction in which the line segment B connecting the center of the through hole 43 with respect to the center line A passing vertically through the center of gravity 20 of the battery module 2 crosses the long side is This is the same as the second embodiment.

  In the case of the third embodiment, as shown in FIG. 9, the holding portion 42 of the bracket 4 is disposed at a high position with respect to the center of gravity 20 of the battery module 2, and accordingly, the top portion 332 of the support portion 33 is also a battery. The module 2 is provided at a position higher than the center of gravity 20. Since the through hole 43 provided in the holding portion 42 is offset by a width M with respect to the center of gravity 20 of the battery module 2, the jack bolt 7 is attached to the through hole 43 as shown in FIG. Even when the battery module 2 is tilted, the battery module 2 is reliably tilted in the direction opposite to the offset direction. In the case of this embodiment, the through hole 43 is offset by a width M in the Y direction to the opposite side to the electrode terminals 21A and 21B. Therefore, by screwing the jack bolt 7 into the through hole 43, the battery module 2 is inclined toward the electrode terminals 21A and 21B.

  As can be seen by comparing the second and third embodiments with respect to the first embodiment, the position of the through hole 43 may be offset by a width M in the Y direction across the long side with respect to the battery module 2. For example, the same effect can be obtained regardless of whether the holding portion 42 of the bracket 4 and the top portion 332 of the support portion 33 in contact with the bracket 4 are at a low position or a high position with respect to the center of gravity 20 of the battery module 2. .

  A battery pack 1 according to a fourth embodiment will be described with reference to FIGS. 11 to 14. In the battery pack 1 of the fourth embodiment, as shown in FIGS. 11 and 12, the position and number of the through holes 43 of the bracket 4 of the battery module 2, and the fixing holes 331 of the support portion 33 of the tray 32 associated therewith. The position and number, and the number of bolts 5 attached to the fixing hole 331 are different from those in the first to third embodiments. In order to firmly fix the battery module 2 to the tray 32, each bracket 4 may be fixed to the support portion 33 with a plurality of bolts 5. In the present embodiment, each bracket 4 is fixed to the support portion 33 using two bolts 5.

  As shown in FIG. 12, the support portion 33 is provided with two fixing holes 331 for screwing the two bolts 5. The bracket 4 has two through holes 43 coaxially with the fixing hole 331 of the support portion 33, that is, two through holes 43. The bracket 4 is disposed at a position that is symmetric with respect to a center line A that passes vertically through the center of gravity 20 of the battery module 2. The two through holes 43 are provided with a second female screw portion S2 having an inner diameter larger than the valley diameter of the first female screw portion S1 of the fixing hole 331. In other words, the through-hole 43 has an inner diameter such that the bolt 5 having the male screw portion T1 that matches the first female screw portion S1 of the fixing hole 331 does not come into contact therewith. The two bolts 5 are screwed into the fixing holes 331 through the through holes 43 to fix the battery module 2 to the tray 32.

  As shown in FIGS. 11, 13, and 14, each through-hole 43 is offset by a width M on each side in the Y direction across the long side with respect to the center line A passing vertically through the center of gravity 20 of the battery module 2. It is arranged at the position. In addition, the holding portion 42 of the bracket 4 is disposed in a place lower than the position of the center of gravity 20 of the battery module 2, and accordingly, the top portion 332 of the support portion 33 of the tray 32 is also lower than the position of the center of gravity 20 of the battery module 2. Low.

  In the battery pack 1 of the fourth embodiment configured as described above, it is necessary to replace at least one of the plurality of battery modules 2, and cables such as the bus bar 6 and other sensors are connected. In order to remove, it may be necessary to secure a working space between the adjacent battery modules 2. In such a case, in the present embodiment, all the bolts 5 are removed and the jack bolts 7 are attached to either one of the through holes 43 as in the other embodiments.

  For example, when it is desired to incline the battery module 2 in the direction opposite to the electrode terminals 21A and 21B in the Y direction across the long side, the width M is offset to the side where the electrode terminals 21A and 21B are provided as shown in FIG. The jack bolt 7 is screwed into the through-hole 43 formed. The tip of the jack bolt 7 hits the top 332 of the support portion 33, and the battery module 2 may be inclined to the side opposite to the side where the jack bolt 7 is mounted, that is, the side opposite to the side where the electrode terminals 21A and 21B are provided. it can.

  For example, when it is desired to incline the battery module 2 to the side where the electrode terminals 21A and 21B are provided in the Y direction across the long side, as shown in FIG. 14, the side opposite to the side where the electrode terminals 21A and 21B are provided. The jack bolt 7 is screwed into the through hole 43 that is offset by the width M. The tip of the jack bolt 7 hits the top 332 of the support portion 33, and the battery module 2 can be tilted to the side opposite to the side where the jack bolt 7 is mounted, that is, the side where the electrode terminals 21A and 21B are provided.

  In the present embodiment, the holding portion 42 of the bracket 4 is arranged at a lower position than the position of the center of gravity 20 of the battery module 2. Since the position of the through hole 43 is offset by the width M in the Y direction across the long side with respect to the center of gravity 20 of the battery module 2, the holding portion 42 of the bracket 4 is connected to the battery as in the third embodiment. Even when the module 2 is arranged at a position higher than the center of gravity 20, the same function and effect are exhibited.

  A battery pack 1 according to a fifth embodiment will be described with reference to FIGS. 15 to 18. In the battery pack 1 of the fifth embodiment, as shown in FIGS. 15 and 16, the bracket 4 further has a bolt hole 44 through which the bolt 5 is passed at a position away from the through hole 43. Therefore, the fixing hole 331 of the support portion 33 is opened coaxially in the bolt hole 44. That is, the bolt 5 is screwed into the fixing hole 331 through the bolt hole 44 to fix the bracket 4 to the support portion 33. In the case of this embodiment, the bolt hole 44 is disposed at a position that is symmetric with respect to the center line A that passes vertically through the center of gravity 20 of the battery module 2, and a line segment C that connects the centers of the bolt holes 44 is the center line A It is arranged to cross.

  In the fifth embodiment, since the bolt hole 44 is disposed at a position away from the through hole 43, the through hole 43 inevitably has the center of gravity 20 of the battery module 2 vertically as shown in FIGS. 15 and 16. A line segment B connecting the centers of the through holes 43 is offset by a width M in the Y direction crossing the long side with respect to the center line A passing through. In the present embodiment, as shown in FIG. 16, one through hole 43 and one bolt hole 44 are provided in each bracket, and the through hole 43 is connected to the electrode terminals 21A and 21B in the Y direction as shown in FIG. On the opposite side to the center of gravity 20 of the battery module 2 and the bolt hole 44, it is offset by a width M. In the fifth embodiment, the through hole 43 is a hole in which a second female screw portion S2 for mounting the jack bolt 7 that abuts against the top portion 332 of the support portion 33 is formed as shown in FIG. It is not used as a hole through which the bolt 5 for fixing the module 2 to the support portion 33 is passed.

  In the battery pack 1 configured as described above, when it is necessary to replace at least one of the plurality of battery modules 2, the bolt 5 is removed from the fixing hole 331 and penetrated in the same manner as in the other embodiments. The jack bolt 7 is screwed into the hole 43 from above. The battery module 2 can be tilted as shown in FIG. 18 because the tip of the jack bolt 7 abuts against the top 332 of the support portion 33. In the case of the fifth embodiment, since the through hole 43 is provided at a position offset by the width M from the center of gravity 20 of the battery module 2 on the side opposite to the electrode terminals 21A and 21B, the jack bolt 7 is screwed. Thus, the battery module 2 can be tilted toward the electrode terminals 21A and 21B. Further, in the case where the side on which the battery module 2 is inclined is set in advance in preparation for the replacement of the battery module 2, the width M is offset in the Y direction with respect to the center of gravity 20 on the side opposite to the side where the battery module 2 is inclined. The through hole 43 may be disposed in

  The bolt hole 44 may not be arranged so that the line segment C that connects the center of the bolt hole 44 intersects the center line A that passes vertically through the center of gravity 20 of the battery module 2. That is, as in the first embodiment, the line segment B connecting the centers of the through holes 43 may be arranged so as to intersect the center line A passing vertically through the center of gravity 20. When the line segment B connecting the centers of the through holes 43 intersects the center line A passing vertically through the center of gravity 20 of the battery module 2, bolt holes 44 are formed on both sides of the through holes 43 in the Y direction across the long side. It may be provided.

  The battery pack 1 of 6th Embodiment is demonstrated with reference to FIG. In the battery pack 1 of the sixth embodiment, as shown in FIG. 19, the bolts are arranged so that the line segment C connecting the center of the bolt hole 44 intersects the center line A passing vertically through the center of gravity 20 of the battery module 2. A hole 44 is arranged, and through holes 43 are provided in the holding portion 42 of the bracket 4 on both sides of the bolt hole 44 in the Y direction across the long side. Accordingly, as shown in FIG. 19, when the battery module 2 is to be tilted in either of the Y directions, the jack bolt 7 may be screwed into the through hole 43 on the opposite side to the side to be tilted.

  In FIG. 19, three battery modules 2 are illustrated in the Y direction across the long side, and the battery modules 2 adjacent to the central battery module 2 are each inclined in a direction away from the central battery module 2. Yes. Since it can be tilted to either side according to the work situation, work efficiency is improved.

  The battery pack 1 of 7th Embodiment is demonstrated with reference to FIGS. 20-24. In the battery pack 1 of the seventh embodiment, the details of the through hole 43 and the bolt hole 44 provided in the bracket 4 of the battery module 2 are different from those of the other embodiments, as shown in FIGS. 20, 21, and 23. Yes. The bracket 4 of the battery module 2 of the present embodiment has a through hole 43 in which a female screw portion S for mounting the jack bolt 7 that abuts against the top portion 332 of the support portion 33 is formed. This is the same as the sixth embodiment in that it is disposed in the portion 42.

  Specifically, as shown in FIGS. 21 and 22, the bolt hole 44 is arranged so that a line segment C connecting these centers intersects a center line A passing vertically through the center of gravity 20 of the battery module 2 and penetrating therethrough. The holes 43 are arranged on both sides of the bolt holes 44 in the Y direction across the long side, at positions offset by a width M in the Y direction with respect to the center line A passing through the center of gravity 20 of the battery module 2 vertically. Yes.

  In the case of the present embodiment, the female screw portion S provided in the through hole 43 is formed in the same size as the female screw portion S formed in the fixing hole 331 of the support portion 33 as shown in FIG. Yes. Since the bolt 5 attached to the fixing hole 331 has a male screw portion T that matches the female screw portion S of the fixing hole 331, the through hole 43 having the same size as the female screw portion S of the fixing hole 331 is provided. Also suitable for female thread S. Therefore, the bolt 5 is passed through the bolt hole 44 to fix the bracket 4 to the support portion 33, and can also be used as the jack bolt 7 by being attached to the through hole 43. That is, it is not necessary to prepare the jack bolt 7 separately.

  As shown in FIG. 22, the holding part 42 of the bracket 4 is arranged at a position lower than the position of the center of gravity 20 of the battery module 2, and the top part 332 of the support part 33 corresponding thereto is also from the position of the center of gravity 20. Is also in a low position. In the case of the present embodiment, the bolt hole 44 is arranged so that the line segment C connecting the center of the bolt hole 44 intersects the center line A passing through the center of gravity 20 of the battery module 2 vertically, and the Y direction crosses the long side. Through holes 43 are arranged on both sides of the bolt holes 44 that are offset by the width M. Therefore, the holding part 42 may be arranged at a position higher than the center of gravity 20 of the battery module 2 as in the third embodiment. When the direction in which the battery module 2 is tilted is set in advance, one through hole 43 may be provided on the side opposite to the direction in which the battery module 2 is tilted.

  In the battery pack 1 of the seventh embodiment configured as described above, it is necessary to replace at least one battery module 2 among the plurality of battery modules 2, and the cables such as the bus bar 6 and other sensors are disconnected. Therefore, it may be necessary to secure a work space between the adjacent battery modules 2. In such a case, in this embodiment, the bolt 5 is removed as in the other embodiments, and the bolt 5 is used as a jack bolt 7 and screwed into the through hole 43 on the side opposite to the side where the battery module 2 is to be tilted. . When the tip of the bolt 5 abuts against the top 332 of the support portion 33, the battery module 2 is tilted to the side opposite to the side where the bolt 5 is screwed.

  In FIG. 24, three battery modules 2 are arranged in the Y direction crossing the long side, and the battery modules 2 adjacent to the center battery module 2 are tilted away from the center battery module 2. Is shown. Thus, in the battery pack 1 of the present embodiment, the battery module 2 can be tilted to any desired position. Further, the bolt 5 used to fix the battery module 2 to the support portion 33 can be screwed as a jack bolt 7 into the through hole 43 opposite to the direction in which the battery module 2 is inclined according to the work situation. Therefore, it is not necessary to prepare the jack bolt 7 separately, and the working efficiency is good.

  The battery pack 1 according to the present invention has been described above using the first to seventh embodiments. Each embodiment is representatively shown for easy understanding of the present invention, and the battery pack 1 of the present invention is not intended to be limited to these embodiments. Moreover, even if it is a structure which is different in each embodiment, what can be applied to other embodiment can be implemented in combination, and these are also included in the scope of the present invention. In the fifth to seventh embodiments, when the bolt hole 44 is provided separately from the through hole 43, it is not essential to provide the through hole 43 and the bolt hole 44 in the holding portion 42 of one bracket 4. Different brackets may be prepared and provided there.

  In addition, as described below as a battery pack of another embodiment according to the present invention, even if it is a group of battery packs configured on the basis that a female screw portion that fits the jack bolt is provided on the bracket. Good.

  [A1] A plurality of battery modules arranged side by side, a tray that supports the plurality of battery modules, a support unit that is integrally formed on the tray corresponding to each of the battery modules, and the battery module A battery pack comprising: a bracket that extends from the top of the support portion to the top of the support portion; and a bolt that fixes the bracket to the top portion, wherein the bracket is a female screw for mounting a jack bolt that abuts the top portion A battery pack having a through hole in which a portion is formed.

  [A2] The brackets are arranged in a pair symmetrical with respect to a center line passing vertically through the center of gravity of the battery module, and a line segment connecting the centers of the through holes is offset with respect to the center line. The battery pack described in [A1] having the through hole.

  [A3] The battery pack according to [A1], wherein the brackets are arranged in a pair symmetrically with respect to a center line passing vertically through the center of gravity of the battery module and lower than the center of gravity along the center line.

  [A4] The battery pack according to any one of [A1] to [A3], wherein the bracket has a bolt hole through which the bolt is passed at a position removed from the through hole.

  [A5] The battery pack described in [A4], wherein the bracket has the bolt hole at a position symmetrical to a center line passing vertically through the center of gravity of the battery module.

  [A6] The battery pack according to [A5], wherein the bracket has a pair of the two through holes that straddle a line segment that connects the centers of the bolt holes.

  [A7] The battery pack according to any one of [A4] to [A6], wherein the bracket has a female screw portion that fits into a male screw portion of the bolt in the through hole.

  [A8] The bracket has a female screw portion having an inner diameter larger than the mountain diameter of the male screw portion of the bolt in the through hole, and the bolt fixes the bracket to the support portion through the through hole. A battery pack described in any one of [A1] to [A3].

  [A9] A plurality of battery modules formed in a rectangular parallelepiped including a long side, a tray on which the plurality of battery modules are arranged and placed in a direction crossing the long side, and the battery modules positioned at both ends of the long side A support hole that is formed integrally with the tray and faces the respective side portions and has a first female screw portion formed at the top thereof is attached to each side portion of the battery module, and the support And a bracket having a through hole in which a second female screw portion that fits a male screw portion of a jack bolt mounted so as to abut against the top portion of the support portion is formed. And a bolt that has a male screw portion that fits into the first female screw portion and is screwed into the fixing hole with at least a portion of the holding portion interposed therebetween, and fixes the battery module to the tray. A battery module replacement method for replacing at least one battery module of a battery pack, wherein the bolt is removed from the fixing hole corresponding to the battery module to be replaced, and the jack bolt is attached to the through hole from above. A battery module replacement method for tilting the battery module in a direction crossing the long side by screwing the jack bolt.

  [A10] The brackets are arranged in a pair at positions symmetrical to a center line passing vertically through the center of gravity of the battery module, and line segments connecting the centers of the through holes are offset with respect to the center line. The battery module to be replaced in a direction opposite to the direction in which the through hole is offset with respect to the center line by screwing the jack bolt into the through hole. The battery module replacement method described in [A9] to be tilted.

  [A11] The bracket includes a pair of the through holes arranged at a position lower than the center of gravity along the center line in a pair symmetrical to a center line passing vertically through the center of gravity of the battery module. The battery module replacement method according to [A9], wherein the battery module is tilted by screwing a bolt into the through hole and pushing the bolt in a direction in which the bolt is tilted in a direction crossing the long side.

  [A12] The bracket has a bolt hole through which the bolt is passed at a position symmetrical to a center line passing vertically through the center of gravity of the battery module, and a line segment connecting the centers of the through holes is defined as the center line. The battery module replacement method according to [A9], wherein the through hole is provided at a position offset with respect to the battery.

  [A13] Each of the brackets has a pair of two through holes that straddle a line segment that connects the centers of the bolt holes, and each of the through holes on the side opposite to the direction in which the battery module is to be tilted. The battery module replacement method described in [A12], wherein the battery module is tilted by screwing a jack bolt.

  [A14] The bracket has a female screw portion that fits the male screw portion of the bolt in the through hole, and the bolt removed from the fixing hole is screwed into the through hole as the jack bolt, The battery module replacement method according to [A12] or [A13], wherein the battery module is tilted in a direction crossing the long side.

  [A15] The bracket has a female screw portion having an inner diameter larger than the crest diameter of the male screw portion of the bolt in the through hole, and the bolt is screwed into the fixing hole through the through hole. When the battery module to be replaced is removed, the bolt of the battery module to be replaced is removed from the fixing hole, and a jack bolt that fits the female screw part is inserted into the through hole. The battery module replacement method according to any one of [A9] to [A11], wherein the battery module is tilted in a direction crossing the long side by being screwed into the hole.

  [A16] When another battery module is arranged on the side where the battery module to be replaced is tilted, the other battery module is replaced with the battery module to be replaced before tilting the battery module to be replaced. The battery module replacement method according to any one of [A9] to [A15], which is tilted in the same manner.

  Furthermore, as described below as a battery pack according to another embodiment of the present invention, it may be a group of battery packs configured based on the positional relationship between the gravity center position of the battery module and the through hole of the bracket.

  [B1] A plurality of battery modules arranged side by side, a tray that supports the plurality of battery modules, a support unit that is integrally formed on the tray corresponding to each of the battery modules, and the battery module A battery pack comprising: a bracket that spans the top of the support part; and a bolt that fixes the bracket to the top part, wherein the support part is located at a position lower than the center of gravity of the battery module. And the bracket has at least a through hole in which a female screw portion is formed in a range overlapping the top portion.

  [B2] The brackets are arranged in a pair symmetrical with respect to a center line passing vertically through the center of the battery module, and a line segment connecting the centers of the through holes is offset with respect to the center line. The battery pack described in [B1] having the through hole.

  [B3] A plurality of battery modules arranged side by side, a tray that supports the plurality of battery modules, a support unit that is integrally formed on the tray corresponding to each of the battery modules, and the battery module A battery pack comprising: a bracket that spans the top of the support portion; and a bolt that secures the bracket to the top portion. The bracket is perpendicular to a center line that passes vertically through the center of gravity of the battery module. A battery pack having at least a through hole in which a female screw portion is formed at a position offset from a target position.

  [B4] The battery pack according to [B3], wherein the support portion has a top portion at a position lower than the center of gravity of the battery module.

  [B5] The bracket has the through hole having an inner diameter that does not contact the male screw portion of the bolt, and the bolt fixes the bracket to the support portion through the through hole. B4]. The battery pack described in any one of [4].

  [B6] The battery pack according to any one of [B1] to [B4], wherein the bracket has a bolt hole through which the bolt is passed at a position removed from the through hole.

  [B7] The battery pack according to [B6], wherein the bracket has a female screw portion that fits into a male screw portion of the bolt in the through hole.

  [B8] The battery pack described in [B6] or [B7], in which the bracket has the bolt hole at a position symmetrical to a center line passing vertically through the center of gravity of the battery module.

  [B9] The battery pack according to [B8], wherein the bracket has a pair of the two through holes that straddle a line segment that connects the centers of the bolt holes.

Furthermore, as described below as a battery pack of another embodiment according to the present invention, a group of battery packs configured based on the relationship between bolts for fixing the battery module via the bracket and through holes of the bracket. There may be.
[C1] A plurality of battery modules arranged side by side, a tray that supports the plurality of battery modules, a support portion formed on the tray corresponding to each of the battery modules, and the battery modules A battery pack comprising: a bracket spanned on the top of the support part; and a bolt for fixing the bracket to the support part, wherein the bracket has an inner diameter larger than the mountain diameter of the male screw part of the bolt. A battery pack having a through hole in which a female screw portion is formed.
[C2] The battery pack according to [C1], wherein the bracket further includes a bolt hole through which the bolt is passed at a position off the through hole.
[C3] The bracket is arranged at a position symmetrical to a center line that passes vertically through the center of gravity of the battery module, and a line segment that connects the centers of the bolt holes intersects the center line. The battery pack according to [C2], which has a hole and a pair of the through holes in a state of straddling a line connecting the centers of the bolt holes.

  DESCRIPTION OF SYMBOLS 1 ... Battery pack, 2 ... Battery module, 20 ... Center of gravity, 22 ... Side part, 32 ... Tray, 33 ... Support part, 331 ... Fixing hole, 332 ... Top part, 4 ... Bracket, 42 ... Holding part, 43 ... Through-hole 44 ... Bolt hole, 5 ... Bolt, 7 ... Jack bolt, S1 ... First female screw part, S2 ... Second female screw part, S ... Female screw part, A ... Center line, B ... (through hole Line segment connecting the center), C ... (connecting the center of the bolt hole), T1 ... (matching to the first female screw portion), male screw portion, T2 ... (matching to the second female screw portion) Male thread, M ... (offset) width.

Claims (7)

A plurality of battery modules arranged side by side;
A tray for supporting the plurality of battery modules;
A support portion formed on the tray corresponding to each of the battery modules;
A bracket spanned from the battery module to the top of the support,
A battery pack comprising a bolt for fixing the bracket to the support part,
The bracket has a through hole in which a female screw portion having an inner diameter that does not contact the male screw portion of the bolt is formed,
The support portion has a fixing hole in which a female screw portion that matches the male screw portion of the bolt is formed,
The through hole is arranged coaxially with the fixing hole,
The battery pack, wherein the bolt is screwed into the fixing hole in a state of passing through the through hole. The brackets are arranged in a pair symmetrical with respect to a center line that passes vertically through the center of gravity of the battery module, and the through hole is located at a position where a line segment that connects the centers of the through holes is offset with respect to the center line The battery pack according to claim 1, comprising: 3. The pair of brackets are disposed at a position symmetrical to a center line passing vertically through the center of gravity of the battery module and lower than the center of gravity along the center line. 4. Battery pack. A plurality of battery modules arranged side by side;
A tray for supporting the plurality of battery modules;
A support portion formed in the tray corresponding to each of the battery modules and having a first female screw portion formed at the top thereof;
A second female screw portion having an inner diameter larger than the valley diameter of the first female screw portion is formed in a through hole that extends from the battery module to the top portion of the support portion and is coaxially disposed in the fixing hole. A formed bracket;
A bolt that has a male threaded portion that matches the first female threaded portion and is threaded into the fixing hole in a state of being passed through the through hole, and fixing the bracket to the support portion;
A battery module replacement method for replacing at least one battery module of a battery pack comprising:
Remove the bolt from the fixing hole corresponding to the battery module to be replaced,
A jack bolt adapted to the second female screw part is attached to the through hole from above,
A battery module exchanging method, wherein the battery module is tilted by screwing the jack bolt. The brackets are arranged in a pair that is symmetrical with respect to a center line that passes vertically through the center of gravity of the battery module, and a line segment that connects the centers of the through holes is offset with respect to the center line. Having the through hole,
5. The battery module to be replaced is tilted in a direction opposite to a direction in which the through hole is offset with respect to the center line by screwing the jack bolt into the through hole. The battery module replacement method described. The bracket has the through hole disposed at a position lower than the center of gravity along the center line in a pair symmetrical to a center line passing vertically through the center of gravity of the battery module,
The battery module replacement method according to claim 4, wherein the battery module is tilted by screwing the jack bolt into the through hole and pushing the jack module in a direction in which the battery module is to be tilted. When the other battery module is disposed on the side on which the battery module to be replaced is tilted, the other battery module is tilted in the same manner as the battery module to be replaced before the battery module to be replaced is tilted. The battery module replacement method according to any one of claims 4 to 6, wherein the battery module is replaced.

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