Heat insulating pad material, particularly for use in battery shield and manufacture of the same

A heat insulating assembly for a battery, said assembly comprising a battery case having outer walls provided with, at lower and upper locations thereon, hook holding locks and lock pins protruding thereover, respectively;

• and a pad made of a molded polyolefin foam and formed with supplementary recesses for lockingly receiving the lock pins disposed at opposed positions to the lock pins, the pad being mounted on the outer walls of the battery case in such a manner that a bottom side of the pad is received in the holding locks and the lock pins of the battery case are lockingly received in the recesses of the pad, thus uniting the pad and the surrounding walls of the battery case together.

A heat insulating assembly for a battery comprising a battery case having outer walls of a generally quadrilateral shape;

• spacer members projecting outwardly from corners of the outer walls to form spaces between respective adjacent spacer members;
• and pad members fitted and held within the spaces in a manner such that they cover the outer walls of the battery, the pad members being made of a molded polyolefin foam.

A heat insulating assembly for a battery comprising a battery case having outer walls;

• a one-piece pad member entirely enclosing the outer walls, the one-piece pad member being configured to conform to the battery case outer walls and constructed of a molded polyolefin foam having a mottled pattern on its surface produced by in-mold expansion molding of expandable polyolefin beads and a polyolefin film laminated together in a manner such that the pattern of the foam is transparent through the film;
• and a locking band fastened and secured around an outer perimeter of the pad member.

A heat insulating assembly for a battery comprising:

• a battery case having outer walls and a one-piece pad member entirely enclosing the outer walls, the one-piece pad member being configured to conform to the battery case outer walls and constructed of a molded polyolefin foam having a mottled pattern on its surface produced by in-mold expansion molding of expandable polyolefin beads and a polyolefin film laminated together in a manner such that the pattern of the foam is transparent through the film, the pad member having mutually engageable ends at both sides thereof and is spliced at its ends and secured to the battery case.