RECTANGULAR SECONDARY BATTERY AND METHOD OF MAKING THE SAME

摘要

A rectangular secondary battery according to the present invention includes an electroconductive member, a first insulating member, a pressure-sensitive circuit breaker that includes an inversion plate and a positive electrode current collector. The electroconductive member has a first outer side surface and a second outer side surface that face away from each other. The first insulating member includes a pair of short side walls. One of the short side walls is located outside of the first outer side surface and presses the first outer side surface toward the second outer side surface. The other short side wall is located outside of the second outer side surface and presses the second outer side surface toward the first outer side surface.

主权项

1. A rectangular secondary battery comprising:
a rectangular housing that has an opening; a sealing plate that has a through-hole and that seals the opening; an electrode body that includes a positive electrode plate and a negative electrode plate and that is disposed in the rectangular housing; a terminal that is electrically connected to the positive electrode plate or the negative electrode plate and that is inserted into the through-hole of the sealing plate; an electroconductive member that is disposed between the sealing plate and the electrode body, that is electrically connected to the terminal, and that has an opening portion at an end thereof on the electrode body side; a inversion plate that seals the opening portion; a current collector that is electrically connected to the positive electrode plate or the negative electrode plate and that is connected to the inversion plate; and a first insulating member that is disposed between the inversion plate and the current collector, wherein, when the pressure inside the rectangular housing reaches a predetermined value or higher, the inversion plate deforms and an electrical connection between the positive electrode plate or the negative electrode plate and the terminal is cut due to deformation of the inversion plate, wherein the first insulating member has a through-hole, wherein the inversion plate and the current collector are connected to each other through the through-hole of the first insulating member, wherein the first insulating member and the current collector are fixed to each other, wherein the electroconductive member has a first outer side surface and a second outer side surface that face away from each other, and wherein the first insulating member includes a first pressing portion that is located outside of the first outer side surface and that presses the first outer side surface toward the second outer side surface and a second pressing portion that is located outside of the second outer side surface and that presses the second outer side surface toward the first outer side surface.