JP5326208B2 - Assembled battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack preventing short circuit between battery modules in the fixing work of a bus bar and enhancing the fixing work efficiency of the bus bar. <P>SOLUTION: The battery pack has a battery module group formed by arranging a plurality of battery modules each having an output terminal, a plurality of conductive bus bars 40 fixed to the output terminal and for electrically connecting the battery modules, and a plate-like bus bar holding plate 20 made of an insulating material and for holding the bus bar. The battery pack furthermore has an insulating cover member 30 arranged every bus bar on a bus bar holding surface 20a on the opposite side to the battery module group, out of both surfaces of the bus bar holding plate, and capable of changing the corresponding bus bar into the insulated state and the exposed state. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to an assembled battery.

  A plurality of battery modules including a plurality of electrically connected single cells are arranged to form a battery module group, and the battery modules are electrically connected in series and / or in parallel to achieve high output and high power. Generally, a battery pack having a capacity is used. The battery modules are electrically connected by fixing a conductive bus bar to the output terminal.

  In such an assembled battery, an insulating bus bar holding plate holding a plurality of bus bars is provided in order to improve the workability of fixing the bus bars and the output terminals. The bus bar holding plate is made of an insulating resin material or the like. When assembling the assembled battery, each bus bar is positioned with respect to each battery module by attaching the bus bar holding plate to the case housing the battery module group, and then the bus bar and the output terminal are fastened with bolts or the like. (See Patent Document 1).

After all the bus bars are fastened to the output terminals, an insulating cover that covers the entire bus bar holding surface is attached to the bus bar holding surface opposite to the battery module group on both sides of the bus bar holding plate. This is to prevent the bus bar from coming into contact with a member outside the assembled battery or the like and causing a short circuit between the battery modules.
JP 2000-223095 A

  The short circuit between the battery modules after assembling the assembled battery can certainly be prevented by the insulating cover.

  However, during the bus bar fastening operation, the bus bar that has been fastened to the output terminal remains exposed. For this reason, there exists a possibility that a fastening tool may contact several bus bars and a short circuit may occur between battery modules.

  Therefore, the operator must perform the bus bar fastening work while paying careful attention to the handling of the fastening tool, the working posture, and the like, and there is a problem that workability is poor.

  Accordingly, an object of the present invention is to provide an assembled battery that can prevent the occurrence of a short circuit between battery modules at the time of fixing the bus bar, improve the fixing workability of the bus bar, and thus improve the assembly workability of the assembled battery. There is.

In order to achieve the above object, the invention according to claim 1 is formed by arranging a plurality of battery modules in which positive and negative output terminals are led out in the same direction so that the leading directions of the positive and negative output terminals are the same. A battery module group;
A plurality of conductive bus bars fixed to the positive and negative output terminals for electrically connecting the battery modules;
One plate-like bus bar holding plate that is arranged only in the direction in which the positive and negative output terminals are led and integrally holds all the bus bars, and is formed from an insulating material;
A plurality of insulating cover members which are arranged for each bus bar on the bus bar holding surface opposite to the battery module group on both surfaces of the bus bar holding plate and can change the corresponding bus bar between a covered state and an exposed state. and, the possess,
At least one of the cover members adjacent to each other has a restricting means for restricting the other cover member to cover the corresponding bus bar when the corresponding bus bar is exposed. is a battery pack made.

  According to the assembled battery of the present invention, since the bus bar is provided on the bus bar holding surface of the bus bar holding plate for each bus bar and has the insulating cover member that can change the corresponding bus bar between the covered state and the exposed state, Each can be separately changed into a covered state and an exposed state, preventing the occurrence of a short circuit between the battery modules during the bus bar fixing operation, improving the bus bar fixing workability, and assembling workability of the assembled battery Can be improved. Further, after the assembled battery is assembled, the bus bar can be covered with the cover member to prevent a short circuit between the battery modules and contact with the high voltage section.

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

(First embodiment)
FIG. 1A is a perspective view showing an example of the assembled battery 10 according to the first embodiment of the present invention when viewed from the front side, and FIG. 1B shows the assembled battery 10 when viewed from the back side. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. FIG. 3 is a perspective view showing the battery module group 50a assembled with the bus bar holding plate 20 in a state where the bus bar 40 is changed to the covering state by the cover member 30 arranged on the bus bar holding plate 20, and FIG. 5 is a perspective view showing an example of a battery module 50 that is a unit unit when assembling 10, FIG. 5 is a perspective view showing the battery module 50 shown in FIG. 4 turned upside down and disassembled, and FIG. 6 is a thin battery. 1 is a perspective view showing an example of 100. FIG. 7 is a perspective view showing the bus bar holding plate 20 and the cover member 30 of the first embodiment, FIG. 8A is a perspective view showing the main part of FIG. 7, and FIG. 8B is a bus bar holding plate. 20 is a perspective view showing a state where the bus bar 40 held at 20 is fastened to the output terminals 140 and 150 of the battery module 50. FIG. In FIG. 2, the surface located on the left side is the front surface of each member, and the surface located on the right side is the back surface of each member.

  With reference to FIGS. 1 to 3, the assembled battery 10 is generally a battery module group 50 a formed by arranging a plurality of battery modules 50 including output terminals 140 and 150, and a battery fixed to the output terminals 140 and 150. A plurality of conductive bus bars 40 for electrically connecting the modules 50, a plate-like bus bar holding plate 20 formed of an insulating material that holds the bus bars 40, and a battery out of both surfaces of the bus bar holding plate 20 An insulating cover member 30 that is arranged for each bus bar 40 on the bus bar holding surface 20a that holds the bus bar 40 on the opposite side of the module group 50a and that can change the corresponding bus bar 40 between a covered state and an exposed state. doing. Various forms for fixing the bus bar 40 to the output terminals 140 and 150 can be selected. In this embodiment, the bus bar 40 is fixed to the output terminals 140 and 150 by fastening with bolts. In the battery module group 50a, a plurality of battery modules 50 are arranged with a cooling air passage 51 through which cooling air flows. The bus bar holding plate 20 includes a through hole 21 formed corresponding to the position of the cooling air flow path 51. The through hole 21 has a long hole shape that matches the opening shape of the cooling air flow path 51. Details will be described below.

  The assembled battery 10 is an in-vehicle battery mounted on a vehicle such as an automobile or a train, and a plurality of battery modules 50 are stacked in a space 11 in the assembled battery case 11. The assembled battery case 11 has an upper plate 12 and a lower plate 13, an inlet duct 14 for introducing cooling air is connected to the front surface of the upper plate 12, and cooling air is led to the back surface of the upper plate 12. An outlet duct 15 is connected for the purpose. The inlet duct 14 is connected to a blower (not shown). The cooling air supplied from the blower is guided into the assembled battery case 11 through the inlet duct 14.

  By connecting any number of battery modules 50 in series and parallel, the assembled battery 10 can handle a desired current, voltage, and capacity. In the illustrated battery module group 50a, ten battery modules 50 are arranged. Ten battery modules 50 are arranged in two rows in the vertical direction and in five rows in the horizontal direction. The positive and negative output terminals 140 and 150 of the battery module 50 are all provided on the same surface (front surface). For example, the positive output terminal 140 of the battery module 50 in the upper left column is the positive output terminal of the assembled battery 10, and the negative output terminal 150 of the battery module 50 in the lower left column is the assembled battery 10. The output terminal on the negative electrode side. Reference numeral 16 in FIGS. 2 and 3 denotes a battery controller.

  The battery modules 50 are air-cooled, and the space between the battery modules 50 is used as a cooling air flow path 51 through which cooling air for cooling each of the battery modules 50 flows (see FIG. 2). The cooling air flows in the cooling air channel 51 from the front side where the positive and negative output terminals 140 and 150 of the battery module 50 are provided to the back side. By cooling each battery module 50 by flowing cooling air, the battery temperature is lowered and the characteristics such as charging efficiency are prevented from being lowered. The clearance between the battery modules 50, that is, the height of the cooling air flow path 51, is defined by a collar (not shown) disposed between the battery modules 50 at the time of stacking. The clearance between the battery modules 50 is determined in consideration of a layout when mounted on the vehicle, dimensions necessary for functioning as the cooling air flow path 51, and the like, but is about several millimeters.

  The space between the upper battery module 50 and the restraint plate 75 and the space between the lower battery module 50 and the lower plate 13 are also used as the cooling air flow paths 51a and 51b. The through holes 21 corresponding to the positions of the cooling air flow paths 51a and 51b do not exist, but the upper cooling air flow path 51a faces the gap between the bus bar holding plate 20 and the upper plate 12, and the lower cooling air flow path In 51b, a gap between the bus bar holding plate 20 and the lower plate 13 is exposed.

  With reference to FIGS. 4 and 5, the battery module 50 includes a cell unit 60 including a plurality of (eight in the illustrated example) thin batteries 100 housed in a module case 70. The battery module 50 is a type of assembled battery in that it includes a plurality of electrically connected single cells. In the present specification, the battery module 50 is a unit unit for assembling an “assembled battery”, and includes a plurality of single cells. A unit in which a battery is stored in a case is referred to as a “battery module”.

  The module case 70 includes a lower case 71 having a box shape in which an opening 71a is formed, and an upper case 72 forming a lid for closing the opening 71a. The edge 72a of the upper case 72 is wound around the edge 71c of the peripheral wall 71b of the lower case 71 by caulking (see the partially enlarged view of FIG. 4). The lower case 71 and the upper case 72 are formed from a relatively thin steel plate or aluminum plate, and are given a predetermined shape by pressing.

  The cell unit 60 includes a battery group 80 in which eight thin batteries 100 are stacked in the thickness direction and electrically connected in series, and a plate-like spacer for sandwiching a tab (electrode) of the thin battery 100. 110 and positive and negative output terminals 140 and 150. Insulating covers 91 and 92 are detachably attached to the front and back surfaces of the cell unit 60.

  The insulating covers 91 and 92 are used to cover the front side and the back side of the battery group 80. An insertion port 91a for inserting a voltage detection line connector (not shown) is formed at the center position of the insulating covers 91 and 92. The detection of voltage is performed for charge / discharge management of the battery module 50.

  The positive and negative output terminals 140 and 150 are led out from the module case 70 through notches 71d and 71e formed in a part of the peripheral wall 71b of the lower case 71. The insertion port 91a of the insulating covers 91 and 92 is also exposed to the outside of the module case 70 through a notch 71f formed in a part of the peripheral wall 71b. Screw holes 141 and 151 into which bolts 43 (see FIG. 8) to be described later are screwed are formed on the front surfaces of the output terminals 140 and 150.

  In order to insert through bolts 74 (see FIG. 3) into the four corners of the module case 70, bolt holes 73 are formed in the four corners of the lower case 71 and the upper case 72, and two spacers 110 are provided. Bolt holes 111 are formed in the upper surface. Reference numeral 93 in FIG. 5 indicates a sleeve inserted into the bolt hole 111 of the spacer 110, and reference numeral 94 indicates a cushioning material provided between the cell unit 60 and the upper case 72.

  Referring to FIG. 6, a thin battery 100 is, for example, a flat lithium ion secondary battery, and a laminated power generation element (not shown) in which a positive electrode plate, a negative electrode plate, and a separator are sequentially laminated is a laminate film or the like. It is sealed with an exterior material 100a. In the battery 100, one end is electrically connected to the power generation element, and a positive electrode tab 100p and a negative electrode tab 100n having a plate shape are led out from the exterior material 100a. The tabs 100p and 100n extend on both sides of the thin battery 100 in the longitudinal direction. In the thin battery 100 including the stacked power generation element, it is necessary to apply pressure to the power generation element and hold it in order to maintain the battery performance by keeping the distance between the electrode plates uniform. For this reason, each thin battery 100 is accommodated in the module case 70 so that the power generation element is pressed down.

  Referring to FIGS. 7 and 8, bus bar holding plate 20 is a plate member having a substantially outer shape, and has mounting portions 22 for holding each of a plurality of bus bars 40. An opening 23 that penetrates from the front surface to the back surface is formed in the mounting portion 22. The output terminals 140 and 150 of the adjacent battery modules 50 face the opening 23. The bus bar holding plate 20 is also formed with an opening 23a that allows the positive and negative output terminals of the assembled battery 10 to face. Further, a holding claw 24 that protrudes from the front surface of the bus bar holding plate 20 and engages with a part of the outer peripheral edge of the bus bar 40 to hold the bus bar 40 is provided. The bus bar holding plate 20 is formed with a window portion 27 through which a voltage detection line connector (not shown) is inserted. The voltage detection line connector is inserted into the insertion port 91 a of the battery module 50 through the window portion 27. The lower end portion of the bus bar holding plate 20 is fitted into a receiving portion 13a formed on the upper end surface of the lower plate 13 (see FIG. 2). Thereby, the mounting position of the bus bar holding plate 20 is determined, and the positions of the plurality of bus bars 40 being held are determined collectively. The bus bar holding plate 20 is made of an insulating material, for example, an insulating resin material. The insulating resin material is not particularly limited, and examples thereof include PP (polypropylene).

  The bus bar 40 includes a pair of fastening portions 44 (corresponding to a fixing portion) fastened (fixed) to the output terminals 140 and 150, and an engagement recess 45 that engages with the holding claw 24. The bus bar 40 shown in the figure has a flat rectangular shape. The fastening portions 44 are provided at both end positions in the longitudinal direction, and the bolt holes 41 are formed. The engaging recess 45 is provided at a central position in the longitudinal direction of the bus bar 40. By fitting the engaging recess 45 into the holding claw 24, the bus bar 40 is held at the mounting site 22. The opening 23 and the holding claw 24 are formed in a direction and a position that match the output terminals 140 and 150 that are electrically connected. Therefore, by fitting the engaging recess 45 into the holding claw 24, each bus bar 40 can be easily arranged at a position matching the output terminals 140 and 150 to be connected. In the illustrated example, eight bus bars 40 are arranged in the horizontal direction, and one bus bar 40 is arranged in the vertical direction. Even if the connection directions are different in this way, the direction in which the bus bar 40 is held by the holding claws 24 is regulated, so that erroneous connection can be fundamentally eliminated.

  The bus bar 40 is fixed to the output terminals 140 and 150 by fastening the bolts 43 inserted into the bolt holes 41 into the screw holes 141 and 151 of the output terminals 140 and 150. The holding claw 24 has not only a bus bar holding function but also a rotation preventing function during the operation of fastening the bolt 43. As a result of fixing the bus bar 40 to the output terminals 140 and 150, the bus bar holding plate 20 is fixed to the battery module group 50a.

  The bus bar 40 is exposed to the outside on the bus bar holding surface 20a opposite to the battery module group 50a on both sides of the bus bar holding plate 20. When conductive foreign objects contact the bus bars 40 exposed on the bus bar holding plate 20, a short circuit occurs between the battery modules 50. In order to prevent such a short circuit between the battery modules 50, it is necessary to cover the bus bar 40 with an insulating cover.

  Here, when the entire bus bar holding surface 20a of the bus bar holding plate 20 is covered with one insulating cover, the occurrence of a short circuit between the battery modules 50 after the assembled battery 10 is assembled is surely prevented. I can. However, since the bus bar 40 that has been fastened to the output terminals 140 and 150 remains exposed during the fastening operation of the bus bar 40, the fastening tool comes into contact with the plurality of bus bars 40, and the battery modules 50 are short-circuited. There still remains a risk of occurrence.

  Therefore, in the battery pack 10 of the first embodiment, the insulating cover member 30 is arranged for each bus bar 40 on the bus bar holding surface 20a of the bus bar holding plate 20, and the corresponding bus bar 40 is covered and exposed. And can be changed.

  When the corresponding bus bar 40 is fastened to the output terminals 140 and 150, the cover member 30 exposes the corresponding bus bar 40, and when the other bus bar 40 other than the corresponding bus bar 40 is fastened to the output terminals 140 and 150. Then, the corresponding bus bar 40 is set in the covering state.

  7 and 8A, the cover member 30 of the first embodiment is detachably attached to the bus bar holding surface 20a of the bus bar holding plate 20, and is attached to the bus bar holding surface 20a. The corresponding bus bar 40 is in a covered state, and the corresponding bus bar 40 is exposed by being removed from the bus bar holding surface 20a. In FIG. 8A, the cover member 30 is attached on the upper side in the drawing, and the upper bus bar 40 (not shown in the drawing) is covered. On the other hand, on the lower side in the figure, the cover member 30 is removed, and the lower bus bar 40 is exposed.

  The cover member 30 includes a storage portion 31 for covering the bus bar 40 and an attachment portion 32 that is detachably attached to the bus bar holding surface 20a. The storage unit 31 also stores the head of the bolt 43 to which the bus bar 40 is fastened. The attachment portion 32 includes a claw portion 32a that is disposed at a substantially central portion in the longitudinal direction of the cover member 30 and engages with the mounting portion 22, a convex portion 32b that fits into the concave portion 25 formed on the bus bar holding surface 20a, and a holding claw A pin receiving portion 32c into which a pin portion 24a formed on the front surface of 24 is fitted. The claw portion 32a is locked to the mounting portion 22, the convex portion 32b of the cover member 30 is fitted into the concave portion 25 of the bus bar holding surface 20a, and the pin portion 24a of the holding claw 24 is fitted into the pin receiving portion 32c, thereby covering the cover member. 30 is attached to the bus bar holding surface 20a.

  In the illustrated example, the concave portion 25 is formed in a rectangular shape, and the convex portion 32b is formed in a circular shape. Since the contact between the concave portion 25 and the convex portion 32b becomes a point contact, it is easy to absorb a dimensional error or the like as compared to the surface contact when the concave portion 25 and the convex portion 32b have the same shape. For this reason, attachment and removal of the cover member 30 with respect to the bus bar holding surface 20a can be easily performed. The same applies to the shape of the pin receiving portion 32c and the shape of the pin portion 24a.

  The cover member 30 is set to a size and a shape that do not block the through hole 21 when the cover member 30 is attached to the bus bar holding surface 20a so that the intake of the cooling air is not hindered. The cover member 30 is made of, for example, an insulating resin material. The insulating resin material is not particularly limited, and examples thereof include PP (polypropylene). The attachment part 32 may be a system using a removable adhesive or pressure-sensitive adhesive other than the fitting system shown in the figure. After the bus bar 40 is fastened, the cover member 30 can be fixed to the bus bar holding plate 20 by heat welding.

  Next, the assembly procedure of the assembled battery 10 in this embodiment is demonstrated.

  A plurality of battery modules 50 arranged on the lower plate 13 are sandwiched and fixed between the lower plate 13 and the restraining plate 75 to form a battery module group 50a. When the battery modules 50 are stacked, a collar is disposed between the battery modules 50 to define the height of the cooling air flow path 51.

  The bus bar 40 is held on the bus bar holding surface 20 a of the bus bar holding plate 20. At this time, each bus bar 40 is disposed at a position matching the output terminals 140 and 150 to be connected by fitting the engaging recess 45 into the holding claw 24. The claw portion 32a is locked to the mounting portion 22, the convex portion 32b of the cover member 30 is fitted into the concave portion 25 of the bus bar holding surface 20a, the pin portion 24a of the holding claw 24 is fitted into the pin receiving portion 32c, and the cover member 30 is fitted to the bus bar. It is attached to the holding surface 20a. By attaching the cover member 30 to the bus bar holding surface 20a, the corresponding bus bar 40 is brought into a covering state. The cover member 30 is attached to each bus bar 40, and all the bus bars 40 are covered.

  The bus bar holding plate 20 is disposed on the front surface of the battery module group 50a. At this time, the lower end portion of the bus bar holding plate 20 is fitted into the receiving portion 13 a of the lower plate 13 to regulate the position of the bus bar holding plate 20 with respect to the lower plate 13. By positioning the bus bar holding plate 20, the plurality of bus bars 40 are positioned simultaneously. Further, the center of the bolt hole 41 of the bus bar 40 and the center of the screw holes 141 and 151 of the output terminals 140 and 150 coincide.

  Next, an operation of fastening the bus bar 40 to the output terminals 140 and 150 is performed. When starting the fastening operation, only one cover member 30 is removed from the bus bar holding surface 20a, and only the bus bar 40 to be fastened is changed from the covered state to the exposed state. The other cover member 30 remains attached to the bus bar holding surface 20a, and the other remaining bus bars 40 are kept in a covered state.

  In this state, the bolt 43 is inserted into the bolt hole 41 of the bus bar 40 that is exposed. The bolt 43 is fastened to the screw holes 141 and 151 of the output terminals 140 and 150 through the opening 23 of the mounting portion 22 (see FIG. 8B). Since the center of the bolt hole 41 of the bus bar 40 and the center of the screw holes 141 and 151 of the output terminals 140 and 150 are coincident, the fastening operation of the bolt 43 can be easily performed. As a result of fixing the bus bar 40 to the output terminals 140 and 150, the bus bar holding plate 20 is fixed to the battery module group 50a.

  When fastening the bus bar 40 other than the bus bar 40 that has been fastened to the output terminals 140 and 150, first, the cover member 30 that has been removed is reattached to the original position, and the bus bar 40 that has been fastened is removed. Change from an exposed state to a covered state.

  Thereafter, only one next cover member 30 is removed from the bus bar holding surface 20a, only the bus bar 40 to be fastened is changed from the covered state to the exposed state, and the fastening operation described above is performed. When the fastening operation is completed, the cover member 30 that has been removed is attached again to the original position, and the bus bar 40 that has been performing the fastening operation is changed from the exposed state to the covered state.

  Since the fastening operation to the output terminals 140 and 150 is performed in a state where only one bus bar 40 to be fastened is exposed, the bus bar 40 that has been fastened to the output terminals 140 and 150 is in a covered state. For this reason, generation | occurrence | production of the short circuit of battery modules 50 by a fastening tool contacting the some bus bar 40 can be eliminated fundamentally. Therefore, the operator does not need to pay excessive attention to the handling of the fastening tool, the working posture, etc., and the workability at the time of fastening the bus bar 40 is improved. Thus, the occurrence of a short circuit between the battery modules 50 during the fastening operation of the bus bar 40 can be prevented, and the fastening workability of the bus bar 40 can be improved, and as a result, the assembly workability of the assembled battery 10 can be improved.

  When the fastening work of the last bus bar 40 is completed, the cover member 30 that has been removed is attached again to the original position, and the last bus bar 40 that has been fastened is changed from the exposed state to the covered state. Thereby, the fastening work about all the bus bars 40 is completed. Since all the bus bars 40 are in the covering state, after the assembled battery 10 is assembled, the occurrence of a short circuit between the battery modules 50 and the contact with the high voltage portion are prevented.

  As described above, according to the assembled battery 10 of the first embodiment, each bus bar 40 is arranged on the bus bar holding surface 20a of the bus bar holding plate 20, and the corresponding bus bar 40 can be changed between a covered state and an exposed state. Since the insulating cover member 30 is provided, each of the bus bars 40 can be individually changed into a covered state and an exposed state, and the occurrence of a short circuit between the battery modules 50 during the fastening operation of the bus bar 40 can be prevented. Therefore, it is possible to improve the workability of fastening the bus bar 40 and to improve the workability of assembling the assembled battery 10. Moreover, after the assembled battery 10 is assembled, the bus bar 40 can be covered with the cover member 30 to prevent the battery modules 50 from being short-circuited or from being brought into contact with the high voltage section.

  When the cover member 30 fastens the corresponding bus bar 40 to the output terminals 140, 150, the corresponding bus bar 40 is exposed, and when the other bus bar 40 other than the corresponding bus bar 40 is fastened to the output terminals 140, 150, Since the corresponding bus bar 40 is in the covering state, the fastening operation of the bus bar 40 is performed in a state where only one bus bar 40 to be fastened is exposed. For this reason, generation | occurrence | production of the short circuit of battery modules 50 at the time of the fastening operation | work of the bus bar 40 can be fundamentally eliminated. Therefore, it is possible to further improve the workability of fastening the bus bar 40, and further improve the workability of assembling the assembled battery 10.

  The cover member 30 is detachably attached to the bus bar holding surface 20a of the bus bar holding plate 20, and is attached to the bus bar holding surface 20a so that the corresponding bus bar 40 is covered, and the cover member 30 is removed from the bus bar holding surface 20a. Since the bus bar 40 is in the exposed state, the change between the covering state and the exposed state of the corresponding bus bar 40 can be easily performed.

(Second Embodiment)
FIG. 9 is a perspective view showing the bus bar holding plate 20 and the cover member 30 of the second embodiment. In addition, the same code | symbol is attached | subjected to the member which is common in 1st Embodiment, and the description is partially abbreviate | omitted.

  The second embodiment is different from the first embodiment in which the bus bar holding plate 20 and the cover member 30 are integrated parts, which are separate parts.

  Similarly to the assembled battery 10 of the first embodiment, the assembled battery 10 of the second embodiment is also provided by disposing an insulating cover member 30 for each bus bar 40 on the bus bar holding surface 20 a of the bus bar holding plate 20. The bus bar 40 can be changed between a covered state and an exposed state. Further, when the corresponding bus bar 40 is fastened to the output terminals 140 and 150, the cover member 30 exposes the corresponding bus bar 40 and fastens other bus bars 40 other than the corresponding bus bar 40 to the output terminals 140 and 150. Sometimes, the corresponding bus bar 40 is in a covered state.

  Referring to FIG. 9, the cover member 30 of the second embodiment is rotatably connected to the bus bar holding surface 20a of the bus bar holding plate 20 via a hinge portion 33, and is directed to the bus bar holding surface 20a. , The corresponding bus bar 40 is put in a covered state, and the corresponding bus bar 40 is exposed by turning in a direction away from the bus bar holding surface 20a. On the upper side in the figure, the cover member 30 is rotated in a direction toward the bus bar holding surface 20a, and the upper bus bar 40 (not shown in the figure) is in a covered state. On the other hand, on the lower side in the figure, the cover member 30 is rotated in a direction away from the bus bar holding surface 20a, and the lower bus bar 40 is exposed.

  The upper cover member 30 has a hinge portion 33 arranged at the upper end edge of the bus bar holding plate 20, and is opened upward in the figure around the hinge portion 33. On the other hand, the lower cover member 30 has a hinge portion 33 arranged at the lower end edge of the bus bar holding plate 20 and is opened downward in the figure around the hinge portion 33. That is, the upper cover member 30 is opened upward, and the lower cover member 30 is opened downward. The cover member 30 is fastened to the bus bar holding surface 20a by fitting the convex portion 32b of the cover member 30 into the concave portion 25 of the bus bar holding surface 20a and fitting the pin portion 24a of the holding claw 24 into the pin receiving portion 32c.

  The bus bar holding plate 20 and the cover member 30 may be manufactured separately, and the hinge portion 33 of the cover member 30 may be joined to the bus bar holding plate 20. It is preferable to have a structure that is folded back at. This is because the number of parts can be reduced and the joining work can be omitted.

  Similarly to the first embodiment, the cover member 30 according to the second embodiment prevents the battery modules 50 from being short-circuited during the fastening operation of the bus bar 40, thereby improving the fastening workability of the bus bar 40. The assembly workability of the assembled battery 10 can be improved.

  The cover member 30 is pivotally connected to the bus bar holding surface 20a of the bus bar holding plate 20 via the hinge portion 33, and can easily change between the covered state and the exposed state of the corresponding bus bar 40. Can do. Since the bus bar holding plate 20 and the cover member 30 are formed as an integral part via the hinge portion 33, the cover member 30 can be easily opened and closed, and positioning when the cover member 30 is closed is easy, and the cover member 30 is lost. There is no fear.

(Third embodiment)
FIG. 10 is a perspective view showing the bus bar holding plate 20 and the cover member 30 of the third embodiment. In addition, the same code | symbol is attached | subjected to the member which is common in 1st, 2nd embodiment, and the description is partially abbreviate | omitted.

  The third embodiment is different from the first and second embodiments in which the entire surface of the bus bar 40 is changed to the exposed state in that a part of the surface of the bus bar 40 can be changed to the exposed state. .

  Similarly to the assembled battery 10 of the first and second embodiments, the assembled battery 10 of the third embodiment also includes an insulating cover member 30 for each bus bar 40 on the bus bar holding surface 20a of the bus bar holding plate 20. The corresponding bus bar 40 can be changed between a covered state and an exposed state. Further, when the corresponding bus bar 40 is fastened to the output terminals 140 and 150, the cover member 30 exposes the corresponding bus bar 40 and fastens other bus bars 40 other than the corresponding bus bar 40 to the output terminals 140 and 150. Sometimes, the corresponding bus bar 40 is in a covered state.

  Referring to FIG. 10, each of the bus bars 40 includes a pair of fastening portions 44 fastened to the output terminals 140 and 150 and an engaging recess 45 that engages with the holding claw 24 as described above. Yes. The pair of fastening portions 44 are provided at both ends in the longitudinal direction, and the engaging recess 45 is provided at a central position in the longitudinal direction. The cover member 30 of 3rd Embodiment can change each of a pair of fastening part 44 in the corresponding bus bar 40 into a covering state and an exposure state separately.

  The cover member 30 includes a base portion 34 attached to the bus bar holding surface 20a of the bus bar holding plate 20 and a pair of covering portions 35 that are rotatably connected to the base portion 34 and individually cover the pair of fastening portions 44. And have. The base portion 34 is a central portion between the pair of fastening portions 44 and is disposed along a direction (vertical direction in the drawing) orthogonal to the longitudinal direction of the bus bar 40. The base 34 is attached to the bus bar holding surface 20a by adhesion, fitting, heat welding, or the like. In the illustrated example, the base portion 34 is attached to the bus bar holding surface 20a by locking the claw portion 32a to the mounting portion 22 and fitting the pin portion 24a of the holding claw 24 into the pin receiving portion 32c. The base portion 34 is sufficient if it has a function of attaching the cover member 30 to the bus bar holding surface 20a at a portion other than the pair of fastening portions 44. The place is good. The covering portion 35 also covers the heads of the bolts 43 to which the bus bar 40 is fastened, similarly to the storage portion 31. On the upper side in the drawing, the pair of covering portions 35 of the cover member 30 are rotated in the direction toward the bus bar holding surface 20a, and the upper bus bar 40 (not shown in the drawing) is in the covering state. On the other hand, on the lower side in the figure, the pair of covering portions 35 of the cover member 30 is rotated in a direction away from the bus bar holding surface 20a, and each of the pair of fastening portions 44 in the lower bus bar 40 is exposed.

  In the illustrated bus bar 40, a pair of fastening portions 44 are arranged on both sides of the engaging recess 45 around the engaging recess 45. In accordance with such an arrangement of the bus bars 40, the cover member 30 has a pair of covering parts 35 arranged on both sides of the base part 34 around the base part 34. The pair of covering portions 35 rotate like wings around the base portion 34. By fitting the convex part 32b provided in the covering part 35 into the concave part 25 of the bus bar holding surface 20a, the covering part 35 is fastened to the bus bar holding surface 20a.

  Preferably, the cover member 30 further includes a holding member that holds the exposed state of the corresponding bus bar 40. By holding the cover member 30 at a position that does not interfere with the fastening operation of the bus bar 40 and holding the corresponding bus bar 40 in an exposed state, there is no need to hold the cover member 30 so as not to cover the bus bar 40. This is because the workability at the time of fastening is improved.

  The cover member 30 of the third embodiment further includes a holding member 36 that holds the exposed state of both the pair of fastening portions 44 in the corresponding bus bar 40. The holding member 36 has a first projecting piece 36a formed on one covering portion 35 (right side in the drawing) so as to protrude toward the front side, and the other covering portion 35 (left side in the drawing) facing the front side. And a pair of second projecting pieces 36b formed so as to project. The first projecting piece 36 a and the second projecting piece 36 b extend along the longitudinal direction of the cover member 30. A concave groove 36c is formed between the pair of second projecting pieces 36b. The width dimension of the concave groove 36c is substantially equal to the width dimension of the first protruding piece 36a, and is set to a dimension in which the first protruding piece 36a is fitted.

  Similarly to the first and second embodiments, the cover member 30 of the third embodiment prevents the battery modules 50 from being short-circuited during the fastening operation of the bus bar 40 and improves the fastening workability of the bus bar 40. As a result, the assembly workability of the assembled battery 10 can be improved.

  With the base portion 34 of the cover member 30 covering the engagement recess 45 of the bus bar 40, the pair of covering portions 35 individually covers the pair of fastening portions 44 in the corresponding bus bar 40. Easy to change. Since only the pair of covering portions 35 is opened and closed while the base portion 34 is attached to the bus bar holding surface 20a, the bus bar holding plate 20 and the cover member 30 can be handled as an integral part, and the covering portion 35 can be easily opened and closed. Positioning when closing the portion 35 is easy, and there is no possibility of losing the cover member 30.

  The cover member 30 of the second embodiment opens above and below the bus bar holding plate 20, whereas the cover member 30 of the third embodiment has a pair of covering portions 35 on the front side of the bus bar holding plate 20. Open to fold. For this reason, according to the cover member 30 of the third embodiment, the bus bar 40 is fastened even if the assembled battery has a structure in which a space for retracting the cover member 30 above and below the bus bar holding plate 20 cannot be secured. The fastening area of the bus bar 40 can be performed by securing an opening area necessary for this purpose on the front side of the fastening portion 44.

  Further, when the bus bar 40 is fastened, the first projecting piece 36a is fitted into the concave groove 36c between the second projecting pieces 36b, whereby the pair of opened covering portions 35 are connected to each other, and the pair of bus bars 40 are connected. The exposed state of both of the fastening portions 44 is maintained. Therefore, it is not necessary to perform the fastening operation while holding the open cover member 30, and the workability at the time of fastening the bus bar 40 becomes better.

  In addition, the structure which changes each of a pair of fastening part 44 in the bus bar 40 into a covering state and an exposed state is not limited to a rotation type structure like 3rd Embodiment. For example, each of the pair of fastening portions 44 can be individually changed to a covered state and an exposed state by a detachable type as in the first embodiment.

(Fourth and fifth embodiments)
11A and 11B are plan views showing the holding member 36 in the fourth embodiment, and FIGS. 12A and 12B are a plan view and a front view showing the holding member 36 in the fifth embodiment. It is. In addition, the same code | symbol is attached | subjected to the member which is common in 1st-3rd embodiment, and the description is abbreviate | omitted in part.

  The structure of the holding member 36 can be changed as appropriate as long as the cover member 30 is opened to hold the exposed state of the bus bar 40 while the bus bar 40 is fastened and the cover member 30 can be easily closed after the bus bar 40 is fastened. The fourth and fifth embodiments differ from the third embodiment in that the configuration of the holding member 36 is modified.

  Referring to FIGS. 11A and 11B, the holding member 36 of the fourth embodiment is a first protruding piece formed to protrude toward the front side on one covering portion 35 (left side in the figure). 36a and a pair of second projecting pieces 36b formed on the other covering portion 35 (right side in the drawing) so as to project toward the front surface side. The second projecting piece 36b extends along a direction orthogonal to the longitudinal direction of the cover member 30 (a direction orthogonal to the paper surface of FIG. 11A). A concave groove 36c is formed between the pair of second projecting pieces 36b. The width dimension of the concave groove 36c is substantially equal to the width dimension of the first protruding piece 36a, and is set to a dimension in which the first protruding piece 36a is fitted. Further, the first projecting piece 36a is formed with a locking projection 37a that is locked to a locking claw 37b provided in the concave groove 36c. Even with such a holding member 36, when the bus bar 40 is fastened, the first protruding piece 36a fits into the concave groove 36c between the second protruding pieces 36b, and the locking claw 37b is locked to the locking projection 37a. By doing so, the opened pair of covering portions 35 are connected to each other, and the exposed state of both of the pair of fastening portions 44 in the bus bar 40 is maintained (FIG. 11B).

  Referring to FIGS. 12A and 12B, the holding member 36 according to the fifth embodiment forms a pair formed so as to protrude toward the front side on one covering portion 35 (left side in the figure). 1 protrusion piece 38a, and the 2nd protrusion piece 38b which makes the pair formed so that it might protrude toward the front side at the other coating | coated part 35 (right side in the figure) was included. The first projecting piece 38 a and the second projecting piece 38 b extend along the longitudinal direction of the cover member 30. When the pair of covering portions 35 are opened, the first projecting piece 38a and the second projecting piece 38b are provided so as to overlap each other. Further, the first protruding piece 38a is formed with a locking recess 39a that is locked to a locking claw 39b provided on the overlapping second protruding piece 38b. A snap fit is formed by the locking recess 39a and the locking claw 39b. Also with such a holding member 36, when the bus bar 40 is fastened, the locking claws 39b are locked to the locking recesses 39a, so that the pair of opened covering portions 35 are connected to each other. The exposed state of both of the fastening portions 44 is maintained (FIG. 12B).

(Sixth embodiment)
FIGS. 13A and 13B are a perspective view and a side view showing the main part of the assembled battery 10 of the sixth embodiment. In addition, the same code | symbol is attached | subjected to the member which is common in the 1st-5th embodiment, and the description is partially omitted.

  The cover member 30 is covering the corresponding bus bar 40 when other bus bars 40 other than the corresponding bus bar 40 are fastened. However, there is a possibility that the cover member 30 is opened for some reason and the bus bar 40 other than the bus bar 40 to be fastened is changed to the exposed state. In particular, when the adjacent bus bars 40 are exposed and the potentials of the adjacent bus bars 40 are different, a short circuit between the battery modules 50 is likely to occur when the bus bars 40 are fastened. For this reason, it is preferable that the adjacent cover member 30 cooperate and form the barrier part used as a barrier with respect to the short circuit of adjacent bus bars 40. FIG. This is to prevent occurrence of a short circuit between adjacent battery modules 50 in advance.

  Therefore, in the sixth embodiment, adjacent cover members 30 cooperate to form a barrier portion 160 that serves as a barrier against a short circuit between adjacent bus bars 40. In this regard, the sixth embodiment is different from the first to fifth embodiments. Since the barrier portion 160 formed by the adjacent cover members 30 exists as a barrier against a short circuit between the adjacent bus bars 40, occurrence of a short circuit between the adjacent battery modules 50 can be prevented in advance.

  Barrier portion 160 is formed by having a structure in which adjacent cover members 30 cannot change adjacent bus bars 40 to an exposed state. Since both adjacent bus bars 40 cannot be changed to the exposed state, occurrence of a short circuit between the adjacent battery modules 50 can be prevented in advance.

  Each of the adjacent cover members 30 is rotatably connected to the bus bar holding surface 20a of the bus bar holding plate 20 via the hinge portion 33 in the same manner as the cover member 30 of the second embodiment. By rotating in the direction toward 20a, the corresponding bus bar 40 is in a covered state, and by rotating in a direction away from the bus bar holding surface 20a, the corresponding bus bar 40 is in an exposed state. The hinge portion 33 in at least one of the adjacent cover members 30 is disposed between the adjacent bus bars 40.

  Adjacent cover members 30 and adjacent bus bars 40 are arranged adjacent to each other in the vertical direction. The hinge portion 33 in at least one of the cover members 30 adjacent to each other in the vertical direction is arranged at a position above the corresponding bus bar 40. In the illustrated example, the hinge portion 33 in the upper cover member 30 is disposed at a position above the upper bus bar 40, and the hinge portion 33 in the lower cover member 30 is positioned above the lower bus bar 40. It is arranged in. With such an arrangement, one of the adjacent cover members 30, that is, the hinge portion 33 of the lower cover member 30 is arranged between the bus bars 40 adjacent in the vertical direction.

  Since only the hinge portion 33 in the lower cover member 30 is disposed between the adjacent bus bars 40, both the upper cover member 30 and the lower cover member 30 can be structurally opened. Yes (see FIG. 13A). However, as shown in FIG. 13B, when the fastening tool 161 or the like comes into contact with the upper and lower cover members 30, the lower cover member 30 is closed, and the lower bus bar 40 is brought into a covered state. Therefore, in relation to a member that may short-circuit adjacent bus bars 40 (for example, the fastening tool 161), the upper and lower adjacent cover members 30 have a structure in which both the upper and lower adjacent bus bars 40 cannot be changed to an exposed state. have. With this structure, the upper and lower adjacent cover members 30 cooperate to form a barrier portion 160 that serves as a barrier against a short circuit between the upper and lower adjacent bus bars 40. Since the barrier portion 160 formed by the adjacent cover members 30 exists as a barrier against a short circuit between the adjacent bus bars 40, the occurrence of a short circuit between the adjacent battery modules 50 can be prevented in advance.

  In addition, the hinge part 33 in the upper cover member 30 is disposed at a position below the upper bus bar 40, and the hinge part 33 in the lower cover member 30 is also disposed at a position below the lower bus bar 40. Even so, the hinge portion 33 of one of the adjacent cover members 30 is disposed between the adjacent bus bars 40. Also in this case, similarly to the illustrated sixth embodiment, the cover members 30 adjacent to each other in the vertical direction in relation to a member (for example, the fastening tool 161) that may short-circuit the adjacent bus bars 40, Both the upper and lower adjacent bus bars 40 have a structure that cannot be changed to the exposed state.

  As described above, in the sixth embodiment, the lower cover member 30 is configured such that the hinge portion 33 is disposed at a position above the lower bus bar 40 and is opened upward. (See FIG. 13A). Even if the lock member 162 (corresponding to the convex portion 32b and the concave portion 25 and the pin receiving portion 32c and the pin portion 24a) for removing the cover member 30 from the bus bar holding surface 20a is removed, the hinge portion 33 is covered. It does not have an elastic force that opens the member 30 upward, and is formed so as to allow the cover member 30 to rotate in the direction toward the bus bar holding surface 20a by its own weight.

  Even when the lock member 162 of the lower cover member 30 is removed while the upper bus bar 40 is fastened, the lower cover member 30 rotates in the direction toward the bus bar holding surface 20a due to its own weight. In addition, the covering state of the lower bus bar 40 can be maintained. Therefore, the cover members 30 adjacent in the vertical direction have a structure in which both the bus bars 40 adjacent in the vertical direction cannot be changed to the exposed state. With this structure, the upper and lower adjacent cover members 30 cooperate to form a barrier portion 160 that serves as a barrier against a short circuit between the upper and lower adjacent bus bars 40, and the upper and lower adjacent battery modules 50. Generation | occurrence | production of mutual short circuit can be prevented beforehand.

  In order to make the structure in which the upper and lower adjacent bus bars 40 cannot be changed to the exposed state by using the dead weight of the cover member 30, at least one of the upper and lower adjacent cover members 30. It is sufficient if the hinge portion 33 of the one cover member 30 is disposed at a position above the corresponding bus bar 40. Therefore, as in the sixth embodiment, the upper and lower cover members 30 are both configured to be opened upward, and the upper cover member 30 is opened upward and the lower cover member 30 is opened downward. The upper cover member 30 may be opened downward, and the lower cover member 30 may be opened upward. The cover member 30 that is opened upward is rotated in the direction toward the bus bar holding surface 20a by its own weight, and the covering state of the corresponding bus bar 40 can be maintained.

(Seventh embodiment)
14A and 14B are a perspective view and a side view showing the main part of the assembled battery 10 of the seventh embodiment. In addition, the same code | symbol is attached | subjected to the member which is common in 1st-6th embodiment, and the description is abbreviate | omitted in part.

  In the case of the cover member 30 of a type that is rotatably connected to the bus bar holding surface 20a via the hinge portion 33, the adjacent cover members 30 have a structure in which both the adjacent bus bars 40 cannot be changed to the exposed state. For this purpose, it is sufficient that the hinge portion 33 of at least one of the adjacent cover members 30 is disposed between the adjacent bus bars 40.

  In the seventh embodiment, only the hinge portion 33 of one cover member 30 is placed between the adjacent bus bars 40 in that the hinge portions 33 of the adjacent cover members 30 are arranged between the adjacent bus bars 40. The sixth embodiment is different from the sixth embodiment. Further, in the seventh embodiment, when at least one of the cover members 30 adjacent to each other has the bus bar 40 corresponding to one cover member 30 exposed, the corresponding bus bar is covered with the other cover member 30. It has the control means 170 which controls so that it may do.

  In the seventh embodiment, the hinge portion 33 in the upper cover member 30 is disposed at a position below the upper bus bar 40, and the hinge portion 33 in the lower cover member 30 is disposed lower than the lower bus bar 40. It is arranged at an upper position. With such an arrangement, the hinge portions 33 of the adjacent cover members 30 are both arranged between the bus bars 40 adjacent in the vertical direction.

  As shown in FIG. 14B, when the upper cover member 30 is opened and the upper bus bar 40 is exposed, the lower cover member 30 can be opened even if the lower cover member 30 is opened. As a result of mutual interference, the lower cover member 30 cannot be opened. Contrary to the illustrated example, when the lower cover member 30 is opened and the lower bus bar 40 is in an exposed state, even if the upper cover member 30 is opened, the storage portions 31 of the cover member 30 are not connected to each other. As a result of interference, the upper cover member 30 cannot be opened. Therefore, the cover members 30 adjacent in the vertical direction have a structure in which both the bus bars 40 adjacent in the vertical direction cannot be changed to the exposed state. That is, when one of the adjacent cover members 30 is open, this one open cover member 30 (the upper cover member 30 in FIG. 14B) is replaced with the other cover member 30 ( In FIG. 14B, it functions as a restricting means 170 that restricts the lower cover member 30) to a closed state. With this structure, it is possible to prevent the occurrence of a short circuit between adjacent battery modules 50 in the same manner as in the sixth embodiment.

(Eighth embodiment)
FIG. 15 is a side view showing a main part of the assembled battery 10 of the eighth embodiment. In addition, the same code | symbol is attached | subjected to the member which is common in 1st-7th embodiment, and the description is partially abbreviate | omitted.

  As in the seventh embodiment, the eighth embodiment includes a cover member 30 of a type that is rotatably connected to the bus bar holding surface 20a via a hinge portion 33. The adjacent cover member 30 and the adjacent bus bar 40 are disposed adjacent to each other in the vertical direction, and the hinge portions 33 of the upper and lower adjacent cover members 30 are disposed between the adjacent bus bars 40 in the vertical direction.

  In the eighth embodiment, the upper and lower cover members 30 that are adjacent to each other are either the upper or lower cover member 30 with the corresponding bus bar 40 exposed, and the other cover with the corresponding bus bar 40 covered. A connection member 165 connected to the member 30 is included. Furthermore, it has a lock member 162 for holding the upper cover member 30 to the bus bar holding surface 20a.

  The connection member 165 includes connection pieces 165a and 165b provided in the respective storage portions 31 of the upper and lower cover members 30, and the connection pieces 165a and 165b have shapes that fit each other. FIG. 15 shows a state in which the lower cover member 30 is opened to expose the lower bus bar 40 and the upper cover member 30 is closed to cover the upper bus bar 40. The lower cover member 30 is held in an open state by the connection piece 165b fitting into the connection piece 165a of the upper cover member 30 in accordance with the upward opening operation.

  The lock member 162 includes a convex portion 32b that fits into the concave portion 25 formed in the bus bar holding surface 20a. By fitting the convex portion 32b of the cover member 30 into the concave portion 25 of the bus bar holding surface 20a, the cover member 30 is fastened to the bus bar holding surface 20a.

  When the upper cover member 30 is fastened to the bus bar holding surface 20a, the lock member 162 does not rotate the upper and lower cover members 30 connected via the connection member 165 against their own weight. It is formed as follows.

  Further, when the upper cover member 30 is not fastened to the bus bar holding surface 20a, the upper and lower cover members 30 connected via the connection member 165 have the lower cover member 30 due to their own weight. Is formed to allow rotation in the direction toward the bus bar holding surface 20a. When the upper cover member 30 is used alone, the upper hinge portion 33 is preferably set so that the upper cover member 30 does not rotate due to its own weight. This is because the upper cover member 30 is opened downward, so that the covering state can be maintained unless it is rotated by its own weight. The lower hinge portion 33 is preferably formed so as to allow the lower cover member 30 to rotate in the direction toward the bus bar holding surface 20a by its own weight. This is because the lower cover member 30 is open upward, so that the covering state can be maintained by allowing the cover member 30 to rotate by its own weight.

  By configuring the lock member 162 and the hinge portion 33 as described above, when the upper and lower cover members 30 are connected via the connection member 165, the upper and lower cover members 30 exhibit the following behavior. As shown in FIG. 15, the lower cover member 30 exposes the lower bus bar 40, and the upper cover member 30 covers the upper bus bar 40. The lower cover member 30 is opened and connected to the upper cover member 30 via a connection member 165.

  When the upper cover member 30 is fastened to the bus bar holding surface 20a by the lock member 162, the upper and lower cover members 30 do not rotate against their own weight, and the lower cover member 30 is opened. Is kept in the state. In this state, the lower bus bar 40 is fastened. The connection member 165 at this time also functions as a holding member 36 that holds the exposed state of the lower bus bar 40.

  When the lower bus bar 40 is fastened, if the lock member 162 of the upper cover member 30 is accidentally removed, the upper and lower cover members 30 are lowered by their own weight. The cover member 30 rotates in the direction toward the bus bar holding surface 20a, and the lower cover member 30 covers the lower bus bar 40. Thus, the open state of the lower cover member 30 cannot be maintained unless the upper cover member 30 is closed.

  Contrary to the illustrated example, the upper cover member 30 may be opened and connected to the lower cover member 30 via the connection member 165. Even if the lock member 162 of the lower cover member 30 is removed, the upper and lower cover members 30 are rotated by the weight of the upper and lower cover members 30 in the direction toward the bus bar holding surface 20a, and the lower bus bar 30 40 covering states are maintained. Therefore, the cover members 30 adjacent in the vertical direction have a structure in which both the bus bars 40 adjacent in the vertical direction cannot be changed to the exposed state. With this structure, it is possible to prevent the occurrence of a short circuit between adjacent battery modules 50 in the same manner as in the sixth embodiment.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the technical concept of the present invention.

  For example, the battery module group 50a in which the battery modules 50 are arranged in two stages and five rows is illustrated, but the arrangement form is not limited to this. Moreover, although the case where the cover member 30 and the bus bar 40 are adjacent to each other in the vertical direction is illustrated, the positional relationship between the adjacent members is not limited to this case. The present invention can also be applied to the assembled battery 10 in which the battery modules 50 are stacked such that the cover member 30 and the bus bar 40 are adjacent to each other in the horizontal direction.

FIG. 1A is a perspective view showing an example of an assembled battery according to the first embodiment of the present invention as seen from the front side, and FIG. 1B is a perspective view showing the assembled battery as seen from the back side. It is. It is sectional drawing which follows the 2-2 line of FIG. 1 (A). It is a perspective view which shows the battery module group with which the bus bar holding plate was assembled | attached in the state which changed the bus bar into the covering state by the cover member arrange | positioned at the bus bar holding plate. It is a perspective view which shows an example of the battery module which is a unit unit at the time of assembling an assembled battery. FIG. 5 is a perspective view showing the battery module shown in FIG. 4 turned upside down and further disassembled. It is a perspective view which shows an example of a thin battery. It is a perspective view which shows the bus bar holding plate and cover member of 1st Embodiment. FIG. 8A is a perspective view showing the main part of FIG. 7, and FIG. 8B is a perspective view showing a state in which the bus bar held on the bus bar holding plate is fastened to the output terminal of the battery module. It is a perspective view which shows the bus bar holding plate and cover member of 2nd Embodiment. It is a perspective view which shows the bus bar holding plate and cover member of 3rd Embodiment. 11A and 11B are plan views showing a holding member in the fourth embodiment. FIGS. 12A and 12B are a plan view and a front view showing a holding member in the fifth embodiment. FIGS. 13A and 13B are a perspective view and a side view showing the main part of the assembled battery of the sixth embodiment. 14A and 14B are a perspective view and a side view showing the main part of the assembled battery of the seventh embodiment. It is a side view which shows the principal part of the assembled battery of 8th Embodiment.

Explanation of symbols

10 battery packs,
20 Busbar holding plate,
20a Bus bar holding surface,
21 through hole,
22 wearing part,
23 opening,
24 holding nails,
24a pin part,
25 recess,
30 cover member,
31 storage section,
32 mounting part,
32a nail part,
32b convex part,
32c pin receiving part,
33 Hinge part,
34 Base,
35 covering part,
36 holding member,
36a first protruding piece,
36b 2nd protrusion piece,
36c concave groove,
38a first protruding piece,
38b second protruding piece,
40 Busba,
41 bolt holes,
43 volts,
44 Fastening part (fixing part),
45 engaging recess,
50 battery module,
50a battery module group,
51 Cooling air flow path,
100 thin battery,
140, 150 output terminals,
160 barrier section,
162 Lock member,
165 connecting member,
165a, 165b connection piece,
170 Regulatory means.

Claims (12)

A battery module group in which a plurality of battery modules in which positive and negative output terminals are led out in the same direction are arranged so that the lead-out directions of the positive and negative output terminals are the same, and
A plurality of conductive bus bars fixed to the positive and negative output terminals for electrically connecting the battery modules;
One plate-like bus bar holding plate that is arranged only in the direction in which the positive and negative output terminals are led and integrally holds all the bus bars, and is formed from an insulating material;
A plurality of insulating cover members which are arranged for each bus bar on the bus bar holding surface opposite to the battery module group on both surfaces of the bus bar holding plate and can change the corresponding bus bar between a covered state and an exposed state. and, the possess,
At least one of the cover members adjacent to each other has a restricting means for restricting the other cover member to cover the corresponding bus bar when the corresponding bus bar is exposed. the battery pack to be.   The cover member exposes the corresponding bus bar when the corresponding bus bar is fixed to the output terminal, and the corresponding bus bar when the other bus bar other than the corresponding bus bar is fixed to the output terminal. The assembled battery according to claim 1, wherein the battery is covered.   The cover member is detachably attached to the bus bar holding surface of the bus bar holding plate, and is attached to the bus bar holding surface so as to cover the corresponding bus bar, and is removed by removing from the bus bar holding surface. The assembled battery according to claim 1, wherein the bus bar is exposed.   The cover member is pivotally connected to the bus bar holding surface of the bus bar holding plate via a hinge portion, and rotates in a direction toward the bus bar holding surface to bring the corresponding bus bar into a covered state. The assembled battery according to claim 1, wherein the bus bar is exposed by rotating in a direction away from the bus bar holding surface. Each of the bus bars includes a pair of fixing portions fixed to the output terminal,
2. The assembled battery according to claim 1, wherein the cover member is capable of individually changing each of the pair of fixing portions in the corresponding bus bar between a covered state and an exposed state . The cover member includes a base portion attached to the bus bar holding surface of the bus bar holding plate, a pair of covering portions that are rotatably connected to the base portion and individually cover the pair of fixing portions, The assembled battery according to claim 5, comprising: The assembled battery according to claim 6, wherein each of the pair of covering portions is arranged on both sides of the base portion around the base portion . The assembled battery according to claim 1, wherein the cover member further includes a holding member that holds an exposed state of the corresponding bus bar . The assembled battery according to claim 5, wherein the cover member further includes a holding member that holds an exposed state of both of the pair of fixing portions in the corresponding bus bar . A battery module group in which a plurality of battery modules in which positive and negative output terminals are led out in the same direction are arranged so that the lead-out directions of the positive and negative output terminals are the same, and
A plurality of conductive bus bars fixed to the positive and negative output terminals for electrically connecting the battery modules;
One plate-like bus bar holding plate that is arranged only in the direction in which the positive and negative output terminals are led and integrally holds all the bus bars, and is formed from an insulating material;
A plurality of insulating cover members which are arranged for each bus bar on the bus bar holding surface opposite to the battery module group on both surfaces of the bus bar holding plate and can change the corresponding bus bar between a covered state and an exposed state. And having
The cover member is pivotally connected to the bus bar holding surface of the bus bar holding plate via a hinge portion, and rotates in a direction toward the bus bar holding surface to bring the corresponding bus bar into a covered state. The corresponding bus bar is exposed by rotating in a direction away from the bus bar holding surface,
The hinge portion in at least one of the adjacent cover members is disposed between the adjacent bus bars,
Thus, the adjacent cover member has a structure in which both the adjacent bus bars cannot be changed to an exposed state, and the battery pack is formed by forming a barrier portion that serves as a barrier against a short circuit between the adjacent bus bars . A battery module group in which a plurality of battery modules in which positive and negative output terminals are led out in the same direction are arranged so that the lead-out directions of the positive and negative output terminals are the same, and
A plurality of conductive bus bars fixed to the positive and negative output terminals for electrically connecting the battery modules;
One plate-like bus bar holding plate that is arranged only in the direction in which the positive and negative output terminals are led and integrally holds all the bus bars, and is formed from an insulating material;
A plurality of insulating cover members which are arranged for each bus bar on the bus bar holding surface opposite to the battery module group on both surfaces of the bus bar holding plate and can change the corresponding bus bar between a covered state and an exposed state. And having
The cover member is pivotally connected to the bus bar holding surface of the bus bar holding plate via a hinge portion, and rotates in a direction toward the bus bar holding surface to bring the corresponding bus bar into a covered state. The corresponding bus bar is exposed by rotating in a direction away from the bus bar holding surface,
The adjacent cover member and the adjacent bus bar are arranged adjacent to each other vertically,
The hinge portion of at least one of the cover members adjacent to each other in the vertical direction is disposed at a position above the corresponding bus bar, and the cover member rotates in the direction toward the bus bar holding surface by its own weight. Allow to move,
Thus, the adjacent cover member has a structure in which both the adjacent bus bars cannot be changed to an exposed state, and the battery pack is formed by forming a barrier portion that serves as a barrier against a short circuit between the adjacent bus bars . A battery module group in which a plurality of battery modules in which positive and negative output terminals are led out in the same direction are arranged so that the lead-out directions of the positive and negative output terminals are the same, and
A plurality of conductive bus bars fixed to the positive and negative output terminals for electrically connecting the battery modules;
One plate-like bus bar holding plate that is arranged only in the direction in which the positive and negative output terminals are led and integrally holds all the bus bars, and is formed from an insulating material;
A plurality of insulating cover members which are arranged for each bus bar on the bus bar holding surface opposite to the battery module group on both surfaces of the bus bar holding plate and can change the corresponding bus bar between a covered state and an exposed state. And having
The cover member is pivotally connected to the bus bar holding surface of the bus bar holding plate via a hinge portion, and rotates in a direction toward the bus bar holding surface to bring the corresponding bus bar into a covered state. The corresponding bus bar is exposed by rotating in a direction away from the bus bar holding surface,
The adjacent cover member and the adjacent bus bar are arranged adjacent to each other vertically,
Each of the hinge portions of the cover members adjacent vertically is disposed between the bus bars adjacent vertically,
The cover members adjacent to each other in the vertical direction further
A connecting member that connects either the upper or lower cover member with the corresponding bus bar exposed to the other cover member with the corresponding bus bar covered; and
A locking member for securing the upper cover member to the bus bar holding surface;
When the lock member is fixing the upper cover member to the bus bar holding surface, the upper and lower cover members connected via the connection member do not rotate against their own weight,
When the upper cover member is not fastened to the bus bar holding surface, the upper and lower cover members connected via the connection member are connected to the hinge portion by the weight of the upper cover member. Allowing rotation in the direction toward the holding surface,
Thus, the adjacent cover member has a structure in which both the adjacent bus bars cannot be changed to an exposed state, and the battery pack is formed by forming a barrier portion that serves as a barrier against a short circuit between the adjacent bus bars .

Images