JP5016566B2 - Battery assembly - Google Patents

Description

  The present invention relates to an assembled battery device.

In a fuel cell vehicle or the like, various assembled batteries configured to obtain a high voltage by combining a plurality of batteries have been proposed as a power source for assisting the power of the fuel cell. In this type of battery pack, it is housed in a box, and cooling is performed by introducing outside air into the box in order to prevent excessive heat generation. For this reason, a waterproof structure is required to prevent water from entering the inside of the battery. For example, a technique has been proposed in which an assembled battery is accommodated in a box and each terminal is covered with a terminal cover (see Patent Document 1).
JP-A-11-213976 (FIGS. 4 and 6)

By the way, in an assembled battery mounted on a fuel cell vehicle or the like, it is necessary to detect the remaining amount of the assembled battery, and therefore it is necessary to draw out a voltage detection wiring. Therefore, a waterproof structure for such sensing wiring is also required.
However, the structure described in Patent Document 1 has a problem that the voltage detection wiring cannot be drawn out because the entire terminal is covered with the terminal cover.

  The present invention solves the above-described conventional problems, and provides an assembled battery device that can reliably waterproof wiring together with terminals with a simple structure in an assembled battery including wiring for voltage detection. Objective.

  The invention according to claim 1 is a bus bar plate having a battery pack including a plurality of battery modules in which a plurality of batteries are arranged, and a through hole provided on one surface side of the battery pack and through which a terminal of each battery module passes. And a bus bar that connects a terminal of the one battery module and a terminal of the other battery module, and a ring that is provided between the bus bar plate and the battery module and collectively surrounds the plurality of terminals of the battery module. And a sensing line that is pulled out from between the adjacent batteries of the battery module and penetrates the inside of the first seal part and penetrates the bus bar plate. And.

  According to this, since each terminal of the battery module and the sensing line are configured to be positioned inside the first seal portion, both the terminal and the sensing line can be waterproofed with a simple structure. Become. In addition, since the sensing line is drawn from between adjacent batteries of the battery module, the number of sensing line holes formed in the bus bar plate can be reduced.

  The invention according to claim 2 is provided between the first seal portion and the battery module, and transmits a load generated when the battery module and the bus bar plate are assembled to the entire first seal portion. A load transmission plate is provided.

  According to this, when the battery module is assembled to the bus bar plate, the entire first seal portion can be deformed by pressing the entire first seal portion of the load transmission plate, so that the entire first seal portion can be It can be made to adhere to a plate and the waterproofing between the adjacent batteries of a battery module can be ensured.

  That is, if a plurality of terminals of the battery module are collectively surrounded, a gap is formed between adjacent batteries, and the sealing performance between the first seal portion and the bus bar plate corresponding to the gap is reduced. There is a risk. On the other hand, according to the second aspect of the present invention, the load is transmitted to the first seal portion located between the batteries via the load transmission plate. It becomes possible to make a part adhere more firmly with respect to a bus-bar plate.

  The invention according to claim 3 is characterized in that a locking portion for locking the sensing line is formed at the center of the load transmission plate.

  According to this, the through-hole formed in a bus-bar plate can be made small. In addition, since a plurality of sensing lines can be combined into one, the sensing lines can be easily inserted into the bus bar plate, and the assembling property is improved.

  According to a fourth aspect of the present invention, there is provided an annular second seal portion that is provided between the first seal portion and the battery and individually surrounds a plurality of terminals of the battery module.

  According to this, since the terminals are individually surrounded by the second seal portion, the sealing performance of the terminals can be improved.

  The invention according to claim 5 includes a ring-shaped plate between the second seal portion and the battery, and the sensing line passes between the battery and the plate and is inserted through the inside of the plate. It is characterized by having constituted so.

  According to this, the surface which the 2nd seal part contacts can be smoothed, and the sealing performance between the 2nd seal part and a battery can be improved.

  According to a sixth aspect of the invention, there is provided a guide member in which a guide groove for guiding the sensing line to the inside of the battery is formed between the second seal portion and the battery.

  According to this, the surface on which the second seal portion abuts can be smoothed by passing the sensing line through the guide groove, so that the sealing performance between the second seal portion and the battery can be improved.

  The invention according to claim 7 is provided with a tube that covers a part of the outer peripheral surface and the end surface of the battery.

  According to this, by covering a part of the end face of the battery with the tube, the second seal portion can be brought into contact with the tube, and water can be reliably prevented from entering from the surface of the end face of the battery.

  According to the present invention, in an assembled battery provided with voltage detection wiring, the wiring can be reliably waterproofed together with the terminals with a simple structure.

  FIG. 1 is a perspective view showing a high-voltage battery provided with the assembled battery device of the present embodiment, FIG. 2 is an exploded perspective view showing the high-voltage battery, FIG. 3 is a plan view showing the arrangement of bus bars on the bus bar plate, and FIG. FIG. 5 is a schematic plan view showing a sensing line, FIG. 6 is an enlarged perspective view showing a guide member, and FIG. 7 is a cross-sectional view showing a waterproof structure opposite to the terminal of the battery module. FIG. 8 is an exploded perspective view showing a state before the assembled battery device is assembled, FIG. 9 is a seal member, and FIG. 9 is a view from the bus bar plate side. (B) is a plan view when viewed from the battery module side, (c) is a side view, FIG. 10 shows a load transmission plate, and (a) is a plan view when viewed from the bus bar plate side. (B) is seen from the battery module side (C) is a side view, FIG. 11 (a) is a perspective view showing a load transmission plate, (b) is a perspective view showing a seal member, and (c) is when the load transmission plate is assembled to the seal member. FIG. 12 is a cross-sectional view showing the main part of the assembled battery device.

  As shown in FIG. 1, the high voltage battery S includes an assembled battery device 1, an ECU 2, and the like. The assembled battery device 1 is housed in a box 3, and the box 3 is fixed on a frame 4 formed like a cross beam. In addition, an ECU 2 is fixed to the upper portion of the box 3, and the ECU 2 is connected to the assembled battery device 1 via a connection cable 2a. The frame 4 on which the high-voltage battery S is mounted is attached to the lower side of a floor panel (not shown) of a vehicle body such as a fuel cell vehicle.

  As shown in FIG. 2, the box 3 includes an upper panel 3a constituting an upper surface, a front panel 3b constituting a front surface, a right panel 3c and a left panel 3d constituting a side surface, a rear panel 3e constituting a rear surface, and the like. Has been. The right panel 3c and the left panel 3d are formed with inlets 3c1 and 3d1 that serve as inlets for cooling air. A fan (not shown) is provided on the left panel 3d side, and air introduced from the intake ports 3c1 and 3d1 is discharged to the outside through an exhaust passage (not shown) formed on the lower surface side of the box 3, The assembled battery 5 in the box 3 can be cooled.

  The assembled battery device 1 includes an assembled battery 5, a bus bar plate 6, a bus bar 7, flexible substrates 30A and 30B (see FIG. 5), a seal member 40 (see FIG. 4), a load transmission plate 50 (see FIG. 4), and the like. Configured.

  The assembled battery 5 includes a plurality of battery modules 10 in which a battery 11A and a battery 11B are arranged side by side.

  The bus bar plate 6 is a base member for attaching the assembled battery 5 to a predetermined position, and has two recessed portions 6a and 6b opened on the rear surface side (see FIG. 3). The bus bar plate 6 is closed by a rear panel 3e via a seal member (not shown), so that a sealing property between the bus bar plate 6 and the rear panel 3e is secured.

  The bus bar 7 is a metal that electrically connects a terminal 15A (see FIG. 3) of one battery module 10 protruding in the recesses 6a and 6b and a terminal 15B (see FIG. 3) of another battery module 10 adjacent thereto. It is a board.

  As shown in FIG. 3, the terminals 15A and 15B of each battery module 10 protrude into the recesses 6a and 6b. The terminal 15A (15B) of one battery module 10 and the terminal 15B (15A) of another battery module 10 Are connected via a bus bar 7. Thereby, the batteries 11A and 11B are all connected in series on the respective sides of the recesses 6a and 6b of the bus bar plate 6. The terminal 15A at one end in the recess 6a is a plus terminal that is taken out to the outside, and the other terminal 15B is connected to one terminal 15A in the recess 6b through a conductive member (not shown). The other terminal 15B in the recess 6b is a minus terminal taken out to the outside. Thereby, all of each battery 11A, 11B is electrically connected in series, and a high voltage is obtained.

  As shown in FIG. 4, the battery module 10 includes batteries 11A and 11B, terminal bases 14 and 14, terminals 15A and 15B, guide members 16 and 16, plates 17 and 17, a conductive member 18, a cap 19, and a tube 20, 20 (see FIG. 7 and FIG. 12).

  The batteries 11A and 11B are arranged such that two unit cells 11a and 11a are connected in series and the axial directions thereof coincide with each other. Further, the battery 11A and the battery 11B are arranged side by side, and are arranged so that the pole of the battery 11A and the pole of the battery 11B are opposite to each other. In addition, the batteries 11A and 11B are connected and fixed between the unit cells 11a and the unit cells 11a by welding a metal connecting member (not shown). Each unit cell 11a is composed of a cylindrical chargeable / dischargeable lithium ion secondary battery, but is not limited to a cylindrical one, and may be a rectangular one.

  As shown in FIG. 5, a tab cover 13 made of synthetic resin is attached to an end portion of each unit cell 11 a on the positive electrode side. The tab cover 13 has a tongue 13a and is rotatably attached to the unit cell 11a. Band-shaped flexible boards 30A and 30B are attached to the batteries 11A and 11B as sensing lines for voltage detection. The flexible boards 30A and 30B extend along the batteries 11A and 11B, and are provided with metal tabs 31 for electrical connection with the negative poles of the unit cells 11a at the positions of the tongue portions 13a. After the metal tab 31 is welded to the negative electrode of the unit cell 11a by welding, the tab cover 13 is rotated to cover the metal tab 31 with the tongue 13a. Thus, by covering the metal tab 31 with the tongue portion 13a, it is possible to prevent the tube described later from being damaged by the welded portion.

  In FIG. 5, for convenience of explanation, the flexible substrates 30A and 30B are shown so that they can be seen. However, in reality, the flexible substrate 30A and the flexible substrate 30B face each other between the battery 11A and the battery 11B. It is arranged like this.

  Returning to FIG. 4, the terminal base 14 is made of metal, and is integrated with the disk portion 14a having a diameter slightly smaller than the diameter of the unit cell 11a and the peripheral portion of the disk portion 14a on the terminals 15A and 15B side. And a plurality of claw portions 14b formed in a bent shape. One terminal base 14 is joined to the positive electrode side of the unit cell 11a of the battery 11A by welding, and the other terminal base 14 is joined to the minus electrode side of the unit cell 11a of the battery 11B by welding.

  The terminal 15A includes a disk-like base portion 15a1 that fits with the terminal base 14, and a projection portion 15a3 that has a screw hole 15a2 formed at the center. Similarly, the terminal 15B includes a disk-like base portion 15b1 that fits into the terminal base 14, and a projection portion 15b3 that has a screw hole 15b2 formed at the center.

  In addition, as shown in FIG. 3, the protrusions 15 a 3 are formed such that the surfaces 15 a 4 and 15 a 4 in the arrangement direction of the batteries 11 A and 11 B in the battery module 10 are flat and the surfaces 15 a 5 and 15 a 5 on the side excluding the surfaces 15 a 4 and 15 a 4 are curved surfaces. It has become. On the other hand, in the protrusion 15b3, contrary to the protrusion 15a3, the surfaces 15b4 and 15b4 in the arrangement direction of the batteries 11A and 11B are curved, and the surfaces 15b5 and 15b5 on the side excluding the surfaces 15b4 and 15b4 are flat. .

  As shown in FIG. 6, the guide member 16 is made of a synthetic resin and has a cylindrical portion 16a that covers the periphery of the base portions 15a1 and 15b1 (see FIG. 4) of the terminals 15A and 15B, and a diameter from the upper end of the cylindrical portion 16a. And a ring portion 16b extending toward the center of the direction. The center of the ring portion 16b is a hole portion 16c into which the protrusion portions 15a3 and 15b3 of the terminals 15A and 15B are inserted, and the opening edge portion of the hole portion 16c protrudes one step from the outer upper surface of the ring portion 16b. A stepped portion 16d is formed. The opening shape of the hole portion 16c has a shape that follows the peripheral surfaces of the protrusions 15a3 and 15b3 of the terminals 15A and 15B, and the opposed one surfaces 16c1 and 16c1 are formed in a flat shape. The other surfaces 16c2, 16c2 are formed in a curved surface shape.

  The guide member 16 has guide grooves 16b1 corresponding to the widths of the flexible boards 30A and 30B extending on the upper surface of the ring portion 16b and extending in the middle of the stepped portion 16d in the radial direction at intervals of 90 degrees. The guide groove 16b1 is formed so that the flexible substrates 30A and 30B do not protrude from the surface of the ring portion 16b when the flexible substrates 30A and 30B are placed. A communication hole 16b2 penetrating in the thickness direction of the guide member 16 is formed in a portion of the four guide grooves 16b1 positioned at the step portion 16d of the two guide grooves 16b1 and 16b1 facing each other.

  Returning to FIG. 4, the plate 17 is made of a synthetic resin and formed in a ring shape. Further, the plate 17 is formed to have substantially the same width as the surface formed along the circumferential direction of the ring portion 16 b of the guide member 16. The plate 17 is formed so that the surface of the plate 17 does not protrude from the stepped portion 16d when the plate 17 is placed on the ring portion 16b.

  As shown in FIG. 7, the conducting member 18 is a metal plate for electrically connecting the battery 11A and the battery 11B, and includes a base plate 18a formed of a single metal plate and a base portion 18a. Also, a welding plate 18b formed of a thin metal plate is bonded to each other by welding. The base plate 18a is formed with openings 18a1 and 18a1 at which portions of the weld plate 18b are exposed at positions corresponding to the batteries 11A and 11B.

  The cap 19 is made of a synthetic resin and has a recess 19a that is open on the battery 11A, 11B side. The recess 19 a has a shape that follows the peripheral surface of the conducting member 18 (see FIG. 4), and is formed larger than the peripheral surface of the conducting member 18 with a margin. The depth of the recess 19a is formed such that the end portions of the batteries 11A and 11B together with the conducting member 18 can be accommodated.

  As shown in FIG. 8, when the flexible boards 30A and 30B are attached to the batteries 11A and 11B (see FIG. 5), the flexible boards 30A and 30B are moved from the outer periphery along the guide grooves 16b1 and 16b1 of the guide members 16A and 16B. It arrange | positions so that it may pass along an inner periphery, and covers and fixes the plates 17 and 17 on flexible board | substrate 30A, 30B.

  As described above, when the terminal bases 14 and 14, the terminals 15 </ b> A and 15 </ b> B, the guide members 16 and 16, and the plates 17 and 17 are attached to the batteries 11 </ b> A and 11 </ b> B, the heat-shrinkable tube 20 is attached to the batteries 11 </ b> A and 11 </ b> B. The tube 20 is heat-shrinked by applying hot air of a predetermined temperature. Thereby, the tubes 20 and 20 are in close contact with the peripheral surfaces of the batteries 11A and 11B.

  The tube 20 is formed of a polyolefin resin or the like, and has a length that can cover the outer peripheral surfaces of the batteries 11A and 11B and part of the end surfaces of the batteries 11A and 11B when thermally contracted. Here, the end face means the face of the plate 17 on the terminals 15A and 15B side, and the face of the single battery 11a of the battery 11A and the face of the single battery 11a of the battery 11B on the cap 19 side. ing.

  Then, the conducting members 18 are applied to the batteries 11A and 11B covered with the tube 20, the welding equipment is inserted from each opening 18a1, and the conducting members 18 are joined to the batteries 11A and 11B through the welding plates 18b. The By connecting the battery 11A and the battery 11B via the conducting member 18, all the single cells 11a of the battery module 10 are electrically connected in series.

  Furthermore, a predetermined amount of potting material P is poured into the recess 19a of the cap 19 (see FIG. 7A), and the batteries 11A and 11B connected by the conducting member 18 are pressed into the recess 19a and cured. The ends of the batteries 11 and 11B including the boundary between the conducting member 18 and the batteries 11A and 11B are sealed with the potting material P (see FIG. 7B). Thereby, intrusion of water or the like from the battery 11A, 11B side to which the cap 19 is attached is prevented. Further, the battery 11A and the battery 11B each covered with the tube 20 are fixed to each other via the connection fixing member 8 at the central portion in the axial direction (see FIG. 2).

  The battery module 10 configured as described above is attached to the bus bar plate 6 via the seal member 40 in which the load transmission plate 50 is fitted (see FIG. 8).

  As shown in FIGS. 9A and 11B, the seal member 40 is formed of an elastic member such as rubber, and is formed in an approximately 8 shape along the shape including the end faces of the batteries 11A and 11B. Has been. The sealing member 40 is formed with substantially circular insertion holes 40a and 40b at positions facing the batteries 11A and 11B.

  A first seal portion 41 extending along the peripheral edge is formed in an annular shape on the surface 40s of the seal member 40 on the bus bar plate 6 side. That is, the first seal portion 41 is configured such that the insertion hole 40 a and the insertion hole 40 b are connected to the bus bar plate 6 inside the first seal portion 41.

  Moreover, as shown in FIG.9 (b), on the surface 40t by the side of the battery module 10 of the sealing member 40, 2nd seal | sticker part 42A, 42B of substantially circular shape along the opening edge part of insertion hole 40a, 40b, respectively. It is formed in an annular shape. The surface 40t on the battery module 10 side has a coupling surface 40t1 that connects the insertion hole 40a and the insertion hole 40b.

  Further, as shown in FIG. 9C, a circumferential groove in which the peripheral portion 50v of the load transmission plate 50 is fitted between the surface 40s on the bus bar plate 6 side of the seal member 40 and the surface 40t on the battery module 10 side. 43 is formed.

  As shown in FIGS. 10 (a) and 11 (a), the load transmission plate 50 is formed of a rigid member such as a synthetic resin or metal, and its outer peripheral edge follows the shape of the seal member 40, and The seal member 40 is formed slightly smaller than the seal member 40. The load transmission plate 50 is formed with insertion holes 50a and 50b through which the terminals 15A and 15B are inserted, and rectangular small holes 50c and 50d are inserted between the insertion holes 50a and 50b. It is formed close to the holes 50a and 50b.

  Further, two locking portions 51 to which the flexible boards 30A and 30B are locked (temporarily fixed) are formed on the surface 50s of the load transmission plate 50 on the bus bar plate 6 side. The locking portion 51 includes locking pieces 51a and 51b formed in an L shape in a side view, and the flexible boards 30A and 30B can be passed through the back sides of the locking pieces 51a and 51b. . In addition, a gap is formed between the locking piece 51a and the locking piece 51b so that the flexible boards 30A and 30B can be pulled out together. Further, a positioning pin 54 for determining the relative position between the load transmission plate 50 and the bus bar plate 6 is formed on the surface 50s of the load transmission plate 50 in the vicinity of the locking portion 51 (see FIG. 10C). .

  Further, as shown in FIG. 10B, three hook-like engagement portions 52, 52, 53 are formed on the surface 50t of the load transmission plate 50 on the battery module 10 side so as to protrude to the battery module 10 side. Has been. The pair of engaging portions 52, 52 are located on both sides of the insertion hole 50a, and the engaging portion 53 is located on the opposite side of the small hole 50d with the insertion hole 50b interposed therebetween.

  As shown in FIG. 11C, by inserting the peripheral edge portion 50v of the load transmitting plate 50 into the peripheral groove 43 of the seal member 40, the insertion holes 50a and 50b, the small holes 50c and 50d, the locking portion 51, The positioning pin 54 and the engaging portion 53 (the engaging portion 52 is not shown) are assembled while being exposed from the inside of the seal member 40. Further, the shape (size) of the load transmission plate 50 is formed to be larger outside the first seal portion 41 and the second seal portions 42A and 42B when the plan view of FIG. Yes.

  As shown in FIGS. 8 and 12, the terminal 15A of the battery module 10 is inserted through the insertion hole 50a, and the terminal 15B is inserted through the insertion hole 50b. At this time, the flexible board 30A extending from the battery module 10 is inserted into the small hole 50c and pulled out from between the locking pieces 51a and 51b through the lower side of the locking pieces 51a. Further, the flexible substrate 30B is inserted into the small hole 50d and pulled out from between the locking piece 51a and the locking piece 51b through the lower side of the locking piece 51b. Further, the flexible boards 30 </ b> A and 30 </ b> B are combined and inserted into the holes 6 c formed in the bus bar plate 6. The size of the hole 6c is such that the connectors C and C (see FIG. 8) formed at the tips of the flexible substrates 30A and 30B can be inserted. The connectors C and C are connected to a board provided in the bus bar plate 6.

  Then, the terminals 15A and 15B are inserted into the insertion holes 50a and 50b and inserted into the through holes 6d and 6d formed in the bus bar plate 6. At this time, the first seal portion 41 of the seal member 40 comes into contact with the lower surface 6e of the bus bar plate 6 (see FIG. 12), and the second seal portions 42A and 42B (see FIG. 9B) of the seal member 40 are in contact with the plate 17. , 17 abuts against the surface of the tube 20 covered (see FIG. 12). Then, the bolts 9 and 9 are inserted into the screw insertion holes 7a and 7a formed in the bus bar 7, and the bolts 9 and 9 are screwed to the terminal 15A and the terminal 15B of another battery module 10 adjacent to the terminal 15A. . Thereby, the battery module 10 is fixed to the bus bar plate 6 in a cantilever state.

  When the left and right directions of the battery module 10 and the load transmission plate 50 are reversed, the engaging portions 52, 52, 53 abut on the guide groove 16b1 in which the communication hole 16b2 of the guide member 16 is not formed. Thus, the engaging portions 52, 52, 53 are not attached to the battery module 10. Thereby, the mutual orientation of the battery module 10 and the load transmission plate 50 is ensured.

  Further, the hole 6c is formed with a notch 6c1 into which the positioning pin 54 is inserted at one corner (see FIG. 8). This ensures the mutual orientation of the bus bar plate 6 and the load transmission plate 50 when the load transmission plate 50 is attached to the bus bar plate 6.

  As described above, according to the assembled battery device 1 of the present embodiment, since the terminals 15A and 15B and the flexible boards 30A and 30B are located inside the first seal portion 41, the flexible board 30A for voltage detection. , 30B, the battery module 10 can be waterproofed, and the sub-conductive part other than the main conductive part of the sensing line can be waterproofed. In addition, since the flexible substrates 30A and 30B are drawn from between the adjacent batteries 11A and 11B of the battery module 10, the number of holes 6c formed in the bus bar plate 6 can be reduced.

  Further, according to the present embodiment, since the entire first seal portion 41 is provided on the load transmission plate 50, the region Q where the load between the battery 11A and the battery 11B is difficult to act (see FIG. 12). In addition, a sufficient load can be applied, and the sealing performance can be further improved.

  Moreover, according to this embodiment, since the latching | locking part 51 which latches flexible board | substrate 30A, 30B is provided in the load transmission plate 50, the hole 6c formed in the bus-bar plate 6 can be made small. In addition, by collecting the flexible boards 30A and 30B in one place, the operation of passing the flexible boards 30A and 30B through the holes 6c is simplified, and the assembling property is improved.

  Further, according to the present embodiment, since the annular second seal portions 42A and 42B that individually surround the plurality of terminals 15A and 15B of the battery module 10 are provided, the sealing performance at the terminals 15A and 15B of the battery module 10 is provided. Can be improved. By improving the sealing performance, not only waterproofing but also intrusion of dust and the like can be effectively prevented.

  In addition, according to the present embodiment, by providing the ring-shaped plate 17, the surface with which the second seal portions 42A and 42B abut can be smoothed. Thereby, the sealing performance of 2nd seal part 42A, 42B and the tube 20 can be improved.

  Further, according to the present embodiment, since the guide groove 16b1 for guiding the flexible boards 30A and 30B is formed in the guide member 16, the surface with which the second seal portions 42A and 42B abut can be further smoothed. The sealing performance at the end surfaces of 11A and 11B (the surface of the tube 20 covering the plate 17) can be improved.

  In addition, the sealing performance in the end surface of battery 11A, 11B can further be improved by combining the plate 17 and the guide groove 16b1.

  Moreover, according to this embodiment, since not only the outer peripheral surface of battery 11A, 11B but a part of end surface is covered with the tube 20, battery 11A, 11B can be waterproofed easily. Furthermore, since the second seal portion abuts on the surface of the tube 20, the sealing performance at the interface with the battery module 10 can be improved.

  In the present embodiment, since the potting material P is poured into the cap 19 and cured, the waterproofing can be easily performed regardless of the accuracy of the length of the U-shaped battery module 10. Further, the amount of the potting material P can always be minimized, and the weight of the apparatus can be reduced.

  Moreover, in this embodiment, since potting and 2nd seal part 42A, 42B are used only for the end surface part of the tubes 20 and 20 which cover battery 11A, 11B, a component shape can be made small and high reliability is achieved. It becomes possible to obtain. Further, by collecting the tightening portion on one side of the battery module 10 and applying a face seal that is not affected by the axial displacement of the batteries 11A and 11B, waterproofing can be secured with a simple structure. In addition, since the battery module 10 is waterproofed, a waterproof structure is unnecessary around the battery module 10, and the cost can be reduced and the weight can be reduced, and a change in specifications such as a change in the number of batteries can be accommodated.

  In the present embodiment, the battery module 10 in which the batteries 11A and 11B including two unit cells 11a are combined has been described as an example. However, the present invention is not limited to this, and one or three or more batteries are used. It is good also as a battery module which combined the battery which consists of the single battery 11a.

FIG. 1 is a perspective view showing a high voltage battery provided with the assembled battery device of the present embodiment. It is a disassembled perspective view which shows a high voltage battery. It is a top view which shows arrangement | positioning of the bus bar of a bus bar plate. It is a disassembled perspective view which shows a battery module. It is a schematic plan view which shows a sensing line. It is an expansion perspective view which shows a guide member. It is sectional drawing which shows the waterproof structure on the opposite side to the terminal of a battery module, (a) is before waterproofing processing, (b) is after waterproofing processing. It is a disassembled perspective view which shows the state before the assembly | attachment of an assembled battery apparatus. The sealing member is shown, (a) is a plan view when viewed from the bus bar plate side, (b) is a plan view when viewed from the battery module side, and (c) is a side view. The load transmission plate is shown, (a) is a plan view when viewed from the bus bar plate side, (b) is a plan view when viewed from the battery module side, and (c) is a side view. (A) is a perspective view showing a load transmission plate, (b) is a perspective view showing a seal member, and (c) is a perspective view when the load transmission plate is assembled to the seal member. It is sectional drawing which shows the principal part of an assembled battery apparatus.

Explanation of symbols

1 assembled battery device 2 ECU
5 battery pack 6 bus bar plate 7 bus bar 10 battery module 11a single cell 11A, 11B battery 13 tab cover 15A, 15B terminal 16 guide member 16b1 guide groove 17 plate 18 conducting member 19 cap 20 tube 30A, 30B flexible substrate (sensing line)
31 Metal tab 41 1st seal part 42A, 42B 2nd seal part 50 Load transmission plate 51 Locking part S High voltage battery

Claims (7)

An assembled battery including a plurality of battery modules each including a plurality of batteries;
A bus bar plate provided on one side of the assembled battery and having a through hole through which a terminal of each battery module passes;
A bus bar connecting a terminal of one of the battery modules and a terminal of the other battery module;
An annular first seal portion provided between the bus bar plate and the battery module and collectively surrounding a plurality of terminals of the battery module;
For voltage detection of each battery, the battery module is pulled out from between the adjacent batteries, inserted through the inside of the first seal part, and a sensing line passing through the bus bar plate,
An assembled battery device comprising:   A load transmission plate is provided between the first seal portion and the battery module, and transmits a load generated when the battery module and the bus bar plate are assembled to the entire first seal portion. The assembled battery device according to claim 1.   The assembled battery device according to claim 2, wherein a locking portion that locks the sensing line is formed at the center of the load transmission plate.   4. The device according to claim 1, further comprising an annular second seal portion that is provided between the first seal portion and the battery and individually surrounds a plurality of terminals of the battery module. 5. The assembled battery device according to the item. A ring-shaped plate is provided between the second seal part and the battery,
The assembled battery device according to claim 4, wherein the sensing line is configured to pass between the battery and the plate and to be inserted through the inside of the plate.   6. The guide member according to claim 4, further comprising a guide member formed with a guide groove for guiding the sensing line to the inside of the battery between the second seal portion and the battery. Assembled battery device.   The assembled battery device according to any one of claims 4 to 6, further comprising a tube covering a part of an outer peripheral surface and an end surface of the battery.

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