Vehicle-used secondary battery

Abstract

The invention provides a vehicle-used secondary battery comprising the following structures: an electrode beam formed by embedding isolation films between an anode plate and a cathode plate, and the isolation films are offset so as to make laminated lamination bodies to wind around a winding shaft in a flat shape, thus forming the electrode beam; a current collector arranged on an end edge portion of the electrode beam and combined with an exposed portion, and the exposed portion is formed by the anode plate or the cathode plate exposing from the laminated portion of the laminated body and extending along the end edge portion; an external part containing the electrode beam and the current collector, and comprises a pair of front portions opposite to a flat surface of the electrode beam, a pair of end surface portions positioned on two end portions of the front portions, a top surface portion and a bottom surface portion, the external part is formed in a rectangular shape, and the current collector is adjacent to one of the end surface portions; the current collector extends along the exposed portion, and a rigid reinforced cross-section deformation portion is formed on the front portion and extending along a direction crossing the end surface portion; the rigid reinforced cross-section deformation portion is formed corresponding to an extending area of the current collector; the current collector can be prevented from entering the electrode beam.

Description

technical field [0001] The present invention relates to a vehicle secondary battery mounted on a vehicle such as an automobile. Background technique [0002] Conventionally, as secondary batteries used in relatively small electronic devices such as cellular phones and personal computers, sealed secondary batteries such as non-aqueous electrolyte secondary batteries represented by nickel-metal hydride secondary batteries or lithium-ion secondary batteries are well known. Battery. In addition, recently, the development of a sealed secondary battery as a large-scale and high-capacity power source that can be mounted on various electric vehicles represented by electric vehicles, hybrid vehicles, and electric bicycles is also being carried out. [0003] For the structure of such a sealed secondary battery, for example, a laminated battery formed by inserting a strip-shaped separator (separator) between a strip-shaped positive electrode plate and a negative electrode plate and wi...

AI Technical Summary

Problems solved by technology

[0007] Although the battery box or cell case is required to be a structure that protects the internal battery even in case of an accident, it is difficult to avoid deformation of the cell case depending on the degree or form of the collision

If the battery shell is deformed, there will be a hidden danger of internal short circuit in view of this

In particular, if an

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