JP2011216243A5 - - Google Patents

Description

When the external terminal is constituted by the male threaded portion of the bolt, the head of the bolt is interposed between the insulating packing and the connecting rod, and the distance between the insulating packing and the connecting rod is widened. A bending action (moment) is generated on the rivet by the action of the force when connecting, and there is a high possibility that the rivet or the connecting portion between the rivet and the connecting rod will be damaged. The head is housed in the bolt housing recess, and the protrusion bulging on the opposite side of the bolt housing recess is in a state of being fitted into the recess of the battery exterior body. The distance between the rivets can be minimized, and the bending effect on the rivet caused by the action of force when connecting a cable or the like to the external terminal can be reduced. Therefore, rotation of the insulating packing can be prevented, and damage on the rivet and its vicinity can be prevented.
In this case, the connecting rod is preferably flat.

That is, in a normal case, when the external terminal 31 a is configured by the male threaded portion 31 a of the bolt 31, the head portion 31 b of the bolt 31 is interposed between the outer insulating packing 34 and the connecting rod 32 and is connected to the outer insulating packing 34. As a result of an increase in the distance from the flange 32, a bending action (moment) is generated on the rivet 33 by the action of an external force when the bus bar B is connected to the external terminal 31a. The possibility of damaging the connecting portion 301 of the rivet 33 or the connecting portion 301 of the rivet 33 and the current collector 30 is increased.

In the above embodiment, in accordance with the adoption of a hexagonal bolt for the bolt 31 serving as the external terminal 31a, the outer shape of the bolt receiving recess 344 is formed in a hexagonal shape corresponding to the head portion 31b of the bolt 31. Although the rotation prevention of the bolt 31 is achieved by the flat portion on the inner peripheral surface of the housing recess 344, the present invention is not limited to this. For example, the head portion 31b of the bolt 31 is a triangular or quadrilateral polygon. In accordance with this, the outer shape of the bolt receiving recess 344 is formed into a polygonal shape such as a triangle or a quadrangle in the outer shape of the head 31b of the bolt 31, and the flat portion on the outer peripheral surface of the head 31b and the bolt You may make it accommodate the head part 31b of the bolt 31 in the bolt accommodation recessed part 344 so that the plane part on the internal peripheral surface of the accommodation recessed part 344 may contact or substantially contact. By doing in this way, the rotation prevention of the volt | bolt 31 can be achieved similarly to the said embodiment.

Claims (6)

  A battery exterior body containing electrodes, and a terminal structure for electrically connecting an object to be connected to an electrode in the battery exterior body, the terminal structure being electrically connected to the electrode and being connected to the battery A current collector disposed inside the exterior body, a connection rod attached to the outside of the battery exterior body with an external terminal, and an insulating packing interposed between the connection cage and the battery exterior body. A battery housing that is fixed to the battery exterior body through a rivet inserted through the battery exterior body and is electrically connected to the current collector. A concave portion is formed on either the upper surface or the opposing surface of the insulating packing that faces the outer surface of the battery outer casing, and the opposing surface that faces the outer surface of the battery outer casing or the outer surface of the battery outer casing of the insulating packing. On the other side, the concave Battery, wherein a convex portion fitted is formed. The concave portion and the convex portion are formed in a polygonal shape when viewed from a direction orthogonal to the facing surface, and a flat portion on the inner peripheral surface of the concave portion and a flat portion on the outer peripheral surface of the convex portion contact or The battery according to claim 1, wherein a convex portion is fitted into the concave portion so as to substantially contact. 3. The battery according to claim 1, wherein the insulating packing includes a rotation restricting portion capable of contacting the connecting rod in a direction intersecting with the axis of the rivet at a position away from a fixed position with respect to the battery exterior body by the rivet. The external terminal is configured by a male threaded portion of a bolt inserted from a surface side facing the outer surface of the battery exterior body with respect to the connection rod, and the insulating packing is formed with a bolt housing recess for housing the head of the bolt. is the convex portion opposite of the bolt housing recess bulges are formed with being, any one of claims 1 to 3 concave the convex portion on an outer surface of the battery case body is fitted is formed The battery described in 1. The battery according to claim 4, wherein the connection rod has a flat plate shape. The battery according to any one of claims 1 to 5 , wherein the battery exterior body has the concave portion or the convex portion formed integrally.