POWER STORAGE MODULE

WIPO Patent Application WO/2017/203731

A1

The purpose of the present invention is to provide a power storage module that can continuously discharge a large current and for which welding strength is ensured. Provided is a power storage module comprising: at least two power storage cell bodies; a plate-like aluminum positive electrode terminal that protrudes without a step from inside of one of the power storage cell bodies in a direction orthogonal to a lamination direction and that has a thickness in the lamination direction of greater than 0.4mm and less than or equal to 1mm; a highly-rigid negative electrode terminal that has an overlap with the aluminum positive electrode terminal in a lamination direction view and that protrudes without a step from inside of overlapping power storage cell bodies; and an ultrasonic welding part formed by welding the aluminum positive electrode terminal and highly-rigid negative electrode terminal together in a region overlapping in the lamination direction view with at least one horn mark from ultrasonic welding provided on the surface of the aluminum positive electrode terminal. Overall, the width of the horn mark in a width direction intersecting, above the surface of the aluminum positive electrode terminal, a protrusion direction in which the aluminum positive electrode terminal protrudes is greater than a length of the horn mark in the protrusion direction.

OHNISHI NORIYUKI (JP)

PCT/JP2016/084479

November 30, 2017

November 21, 2016

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YAMAHA MOTOR CO LTD (JP)

B23K20/10; H01M50/211; H01M50/51; H01M50/516; H01M50/178; H01M50/548; H01M50/553; H01M50/562

JP2011009516A	2011-01-13
JP2004281236A	2004-10-07
JP2007229788A	2007-09-13
JP2004178860A	2004-06-24

TASS MEISTER PATENT FIRM (JP)

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