JP6442305B2 - Power storage module - Google Patents

Description

  The present invention includes a storage battery group in which a plurality of storage batteries are stacked, and electrically connects the electrode terminals of the storage batteries adjacent to each other in the stacking direction, and includes an external connection terminal portion that is electrically connected to an external device. The present invention relates to a power storage module to be provided.

  Generally, a power storage module including a storage battery group (battery module) in which a plurality of storage batteries (battery cells) are stacked is known. Since this power storage module is mounted on, for example, an electric vehicle such as a hybrid vehicle or an EV, the output voltage is set high by stacking a large number of storage batteries.

  In the power storage module, a negative electrode terminal provided in one of the storage batteries adjacent to each other and a positive electrode terminal of the other storage battery are electrically connected in series by a bus bar. As this type of technology, for example, a power storage device disclosed in Patent Document 1 is known.

  In this power storage device, at least first to third power storage modules each consisting of a plurality of power storage cells are juxtaposed, and the power storage module terminals of the power storage modules adjacent to each other are electrically connected by a power storage module bus bar. . The power storage module bus bar includes a long power storage module bus bar provided on one end side of the power storage module and a short power storage module bus bar provided on the other end side of the power storage module.

JP 2014-93276 A

  By the way, before the power storage module terminal (external connection terminal portion) of the power storage module is connected by the power storage module bus bar, the power storage module terminal is exposed to the outside. For this reason, there is a concern that the power storage module terminal comes into contact with other members and is damaged, and it is desired to effectively protect the power storage module terminal.

  The present invention solves this type of problem, and provides a power storage module capable of effectively protecting the external connection terminal portion with a simple configuration and forming a protective structure with excellent operability. With the goal.

  The present invention includes a storage battery group in which a plurality of storage batteries are stacked, and electrically connects the electrode terminals of the storage batteries adjacent to each other in the stacking direction, and includes an external connection terminal portion that is electrically connected to an external device. The present invention relates to a storage module to be provided. The power storage module includes an opening / closing lid that can open and close an external connection terminal portion with respect to the outside, and a bearing member that rotatably supports the opening / closing lid.

  The opening / closing lid is provided with a rotating shaft formed with two flat surfaces parallel to each other, while the bearing member has a bearing hole portion in which the rotating shaft is rotatably arranged. The bearing hole is constituted by a C-shaped inner circumferential surface provided with a shaft attaching / detaching slit set to an opening width equal to or larger than the distance between two flat surfaces.

  The power storage module preferably includes a holding mechanism that holds the open / close lid at a predetermined opening angle with respect to the bearing member. At this time, the holding mechanism includes a rotation-side protrusion provided on the opening / closing lid in the vicinity of the rotation shaft, and a fixed-side protrusion provided on the bearing member to be engaged with the rotation-side protrusion. And preferably.

  Further, in this power storage module, it is preferable that the bearing member is provided with a detachable protrusion that holds the opening / closing lid at an opening angle larger than the opening angle with respect to the bearing member. When the rotation-side convex portion gets over the attachment / detachment projection and engages with the attachment / detachment projection, the two flat surfaces of the rotation shaft can freely pass through the shaft attachment / detachment slit on the C-shaped inner peripheral surface. It is preferable that the posture is maintained.

  Furthermore, in this power storage module, when the rotation-side convex portion passes over the detachable convex portion and engages with the detachable convex portion, the extending portion that continues from the pivot shaft of the opening / closing lid to the lid body has a C-shape. It is preferable to hold in a posture parallel to the shaft attaching / detaching slit on the inner peripheral surface.

  According to the present invention, when the open / close lid is closed, the external connection terminal portion is not contacted from the outside, and the external connection terminal portion can be well protected. On the other hand, when the opening / closing lid is opened, the connection work to the external connection terminal portion is easily performed.

  Furthermore, the rotational shaft can pass through the shaft attaching / detaching slit only by arranging two flat surfaces of the rotating shaft at an angle corresponding to the shaft attaching / detaching slit of the C-shaped inner peripheral surface. Therefore, the opening / closing lid can be easily detached from the bearing member.

  Accordingly, it is possible to effectively protect the external connection terminal portion with a simple configuration and to configure a protection structure with excellent operability.

It is a schematic perspective explanatory drawing of the electrical storage module which concerns on embodiment of this invention. It is a principal part disassembled perspective explanatory drawing of the said electrical storage module. It is a principal part disassembled perspective explanatory drawing of the bus-bar unit which comprises the said electrical storage module. It is side surface explanatory drawing when an opening-and-closing lid is a closed state. It is side surface explanatory drawing when the said opening-and-closing lid | cover is a work open state. It is side surface explanatory drawing when the said opening-and-closing lid | cover is in a detachable state.

  As shown in FIG.1 and FIG.2, the electrical storage module 10 which concerns on embodiment of this invention is assembled | attached to electric vehicles, such as a hybrid vehicle which is not shown in figure, or EV, for example.

  The power storage module 10 includes a storage battery group (battery module) 12M in which a plurality of storage batteries (battery cells) 12 are stacked in the horizontal direction (arrow A direction). The storage battery 12 has a rectangular shape, and is stacked in the direction of arrow A alternately with an insulating separator (holder) 14 in a state of being placed in a standing posture.

  At both ends of the storage battery group 12M in the stacking direction, rectangular (or square) end plates 18a, 18b are disposed with insulator plates (or separators 14) 16a, 16b having heat insulating functions and insulating functions interposed therebetween. The The end plates 18a and 18b are arranged at both ends in the direction of arrow B and extend in the direction of arrow A, for example, are connected by a pair of connection bands 20a and 20b, and hold the storage battery group 12M integrally.

  The storage battery 12 consists of a lithium ion battery, for example, and has a rectangle (or square). On the upper surface of each storage battery 12, a positive electrode terminal 22a and a negative electrode terminal 22b are provided.

  As shown in FIG. 2, the insulator plates 16 a and 16 b are configured in a substantially flat plate shape (or may be the same as the separator 14). The end plates 18a and 18b are formed in a substantially flat plate shape, and a plurality of screw holes 24 are formed vertically at both ends of the end plates 18a and 18b in the arrow B direction.

  The connection band 20 a is formed of a horizontally long sheet metal (metal plate), and an opening 26 a is formed as necessary to introduce a coolant for weight reduction or cooling of the storage battery 12, for example. The connection band 20a has a U-shaped cross-section when viewed from one end in the stacking direction (arrow A direction) of the storage battery group 12M. The end portions 28a, 28a in the longitudinal direction (long side direction) of the connection band 20a are arranged on the plate surface (main surface) so as to cover the short sides of the end plates 18a, 18b by bending in the arrow B direction.

  In each end portion 28a, a plurality of hole portions 30a are formed vertically. Each hole 30a is arranged coaxially with each screw hole 24 of the end plates 18a, 18b. The screws 32a are inserted into the holes 30a and screwed into the screw holes 24, whereby the end portions 28a of the connection band 20a and the end plates 18a and 18b are fixed.

  Upper and lower ends of the connecting band 20a are provided with an upper bent portion 34a and a lower bent portion 36a that are bent inward in the horizontal direction from the vertical direction. The bent portion 34a covers one upper angle of the storage battery group 12M, and the bent portion 36a holds one lower corner portion of the storage battery group 12M.

  The connecting band 20b is configured in the same manner as the above-described connecting band 20a, and the same reference numerals are assigned the same reference numerals instead of the reference numerals a, and detailed descriptions thereof are omitted.

  A substantially U-shaped bus bar unit 36 is mounted on the upper surface of the storage battery group 12M. The bus bar unit 36 includes a plurality of bus bars 38 that electrically connect the electrode terminals 22a of one storage battery 12 and the electrode terminals 22b of the other storage battery 12 adjacent to each other. The bus bar 38 is connected to the insulating cover 40. Covered. The plurality of storage batteries 12 are electrically connected in series via the bus bar unit 36.

  The bus bar unit 36 is provided with a pair of external connection terminal portions 42a and 42b located at both ends in the stacking direction of the storage battery group 12M. One of the external connection terminal portions 42a and 42b is a positive pole and the other is a negative pole, and the axial direction extends outward in the stacking direction.

  As shown in FIG. 3, a case portion 40a is formed at one end of the insulating cover 40, and the external connection terminal portion 42a is accommodated in the case portion 40a. A pair of bearing members 44 are integrally provided on the upper portion of the case portion 40a, and an opening / closing lid 46 is rotatably supported by the bearing members 44. The open / close lid 46 can open and close the external connection terminal portion 42a with respect to the outside.

  As shown in FIGS. 3 and 4, the opening / closing lid 46 is integrally formed from a rotating shaft 48, an extending portion 50 and a lid body 52. The rotating shaft 48 is provided with two flat surfaces 48a and 48b that are parallel to each other at both ends, the extending portion 50 extends in parallel with the flat surfaces 48a and 48b, and the lid body 52 is It is bent from the end of the protruding portion 50 by approximately 90 °. The lid body 52 has a flat plate shape and contacts the end surface of the case portion 40a to protect the external connection terminal portion 42a. On the inner surface side of the lid main body 52, a rotation-side convex portion 54 is bulged and formed in the vicinity of the rotation shaft 48.

  Each bearing member 44 has a bearing hole 56 in which a rotation shaft 48 is rotatably disposed. The bearing hole 56 is constituted by a C-shaped inner peripheral surface 56a provided with a shaft attaching / detaching slit 58 set to an opening width S2 (S1 ≦ S2) equal to or greater than the distance S1 between the two flat surfaces 48a, 48b. The

  The bearing member 44 is formed with a bulging fixed side convex portion 60 that engages so that the rotational side convex portion 54 gets over. A holding mechanism 62 is constituted by the rotation-side convex portion 54 and the fixed-side convex portion 60, and the opening / closing lid 46 is held in a substantially horizontal posture (opening angle 90 °) by the holding mechanism 62 (see FIG. 5). This holding posture is suitable when performing wiring work or the like of the external connection terminal portion 42a. From the viewpoint of workability, the holding angle of the opening / closing lid 46 can be changed.

  As shown in FIGS. 3 and 6, the bearing member 44 has a detachable protrusion that holds the open / close lid 46 at an opening angle larger than 90 ° relative to the bearing member 44, for example, an opening angle of 120 °. 64 is provided. As shown in FIG. 6, the two flat surfaces 48 a and 48 b of the rotation shaft 48 are C in a state where the rotation-side convex portion 54 gets over the attachment / detachment projection 64 and engages with the attachment / detachment projection 64. It is held in such a posture that it can pass through the shaft attaching / detaching slit 58 of the letter-shaped inner peripheral surface 56a. With the rotation-side convex portion 54 engaged with the attaching / detaching convex portion 64, the extending portion 50 is held in a posture parallel to the shaft attaching / detaching slit 58 of the C-shaped inner peripheral surface 56a.

  The external connection terminal portion 42b side is configured in the same manner as the external connection terminal portion 42a described above, and detailed description thereof is omitted.

  Next, operation | movement of the electrical storage module 10 comprised in this way is demonstrated below.

  As shown in FIG. 4, the open / close lid 46 covers the external connection terminal portion 42a and protects the external connection terminal portion 42a when the lid main body 52 abuts against the end surface of the case portion 40a. Then, when performing the wiring work or the like of the external connection terminal portion 42a, the lid body 52 is swung upward, whereby the rotation shaft 48 is rotated in the opening direction within the bearing hole portion 56.

  For this reason, the rotation-side convex portion 54 that swings upward integrally with the lid main body 52 once makes contact with the fixed-side convex portion 60. Furthermore, when the lid body 52 is swung in the opening direction, the rotation-side convex portion 54 gets over the fixed-side convex portion 60 and engages with the fixed-side convex portion 60 (see FIG. 5). Accordingly, the opening / closing lid 46 is held in a substantially horizontal posture by the holding mechanism 62. In this state, wiring work and the like of the external connection terminal portion 42a are performed.

  After the wiring work or the like is completed, the opening / closing lid 46 is swung upward. Thereby, the rotation side convex part 54 gets over the attaching / detaching convex part 64 and engages with the attaching / detaching convex part 64 (see FIG. 6). For this reason, the opening / closing lid 46 is held at an opening angle (for example, 120 °) larger than the substantially horizontal posture. At that time, the two flat surfaces 48a and 48b of the rotating shaft 48 are held in such a posture that they can pass through the shaft attaching / detaching slit 58 of the C-shaped inner peripheral surface 56a. Accordingly, the rotation shaft 48 is detached from the bearing hole 56.

  In this case, in this embodiment, as shown in FIG. 4, when the opening / closing lid 46 is closed, the external connection terminal portion 42a is not contacted from the outside, and the external connection terminal portion 42a is well protected. be able to. On the other hand, as shown in FIG. 5, when the opening / closing lid 46 is opened, the connection work to the external connection terminal portion 42a is performed.

  Further, when the two flat surfaces 48a and 48b of the rotation shaft 48 are arranged at an angle corresponding to the shaft attachment / detachment slit 58 of the C-shaped inner peripheral surface 56a, the rotation shaft 48 is attached to the shaft attachment / detachment. It can pass through the slit 58. As a result, the opening / closing lid 46 can be easily detached from the bearing member 44.

  Further, since the rotation-side convex portion 54 gets over the fixed-side convex portion 60 and engages with the fixed-side convex portion 60, the operator feels that the opening / closing lid 46 is disposed at the wiring work position. (Click feeling) can be detected. Similarly, since the rotation-side convex portion 54 gets over the detachable convex portion 64 and engages with the detachable convex portion 64, the operator detects that the opening / closing lid 46 is disposed at a detachable position. It becomes possible to do.

  Therefore, the open / close lid 46 is held in the closed state, the work open state, and the detachable state, and the operator can easily know each state of the open / close lid 46. Therefore, the operability of the opening / closing lid 46 is improved satisfactorily.

  Furthermore, the extending portion 50 is held in a posture parallel to the shaft attaching / detaching slit 58 of the C-shaped inner peripheral surface 56a in a state where the rotation-side convex portion 54 is engaged with the attaching / detaching convex portion 64. . In this state, if the operator tries to rotate the opening / closing lid 46 in the closing direction, the rotating shaft 48 may be detached from the shaft attaching / detaching slit 58 before excessive stress is generated on the rotating shaft 48. It becomes possible. Thereby, there exists an advantage that damage to the opening-and-closing lid | cover 46 is suppressed reliably.

  For this reason, in the electrical storage module 10, while being able to protect the external connection terminal part 42a effectively with a simple structure, the effect that it becomes possible to comprise the protection structure excellent in operativity is acquired.

DESCRIPTION OF SYMBOLS 10 ... Power storage module 12 ... Storage battery 12M ... Storage battery group 14 ... Separator 18a, 18b ... End plate 20a, 20b ... Connection band 22a, 22b ... Electrode terminal 36 ... Bus bar unit 38 ... Bus bar 40 ... Insulating cover 42a, 42b ... External connection Terminal part 44 ... Bearing member 46 ... Opening / closing lid 48 ... Turning shaft 50 ... Extension part 52 ... Cover body 54 ... Turning side convex part 56 ... Bearing hole part 58 ... Shaft for attaching / detaching shaft 60 ... Fixed side convex part 62 ... Holding mechanism 64 ... Removable projection

Claims (4)

A storage battery module comprising a storage battery group in which a plurality of storage batteries are stacked, and electrically connecting electrode terminals of the storage batteries adjacent to each other in the stacking direction, and providing an external connection terminal portion that is electrically connected to an external device. There,
An open / close lid that can open and close the external connection terminal part with respect to the outside;
A bearing member for rotatably supporting the opening / closing lid;
With
While the opening / closing lid is provided with a rotating shaft formed with two flat surfaces parallel to each other,
The bearing member has a bearing hole portion in which the rotation shaft is rotatably arranged,
The power storage module according to claim 1, wherein the bearing hole portion is configured by a C-shaped inner peripheral surface provided with a shaft attaching / detaching slit set to an opening width equal to or larger than a distance between the two flat surfaces. The power storage module according to claim 1, further comprising a holding mechanism that holds the opening / closing lid at a predetermined opening angle with respect to the bearing member.
The holding mechanism includes a rotation-side convex portion provided on the opening / closing lid in proximity to the rotation shaft,
A fixed-side convex portion provided on the bearing member and engaged so that the rotating-side convex portion gets over,
A power storage module comprising: The storage module according to claim 2, wherein the bearing member is provided with a detachable convex portion that holds the opening / closing lid at an opening angle larger than the opening angle with respect to the bearing member,
When the rotation-side convex portion gets over the detachable convex portion and engages with the detachable convex portion, the two flat surfaces of the rotational shaft are used for the shaft detachment of the C-shaped inner peripheral surface. A power storage module, wherein the power storage module is held in a posture capable of passing through a slit.   4. The power storage module according to claim 3, wherein the rotation-side convex portion extends from the pivot shaft of the opening / closing lid to the lid body when the pivot-side convex portion gets over the detachable convex portion and engages with the detachable convex portion. The part is held in a posture parallel to the shaft attaching / detaching slit on the C-shaped inner peripheral surface.

Images