Electrochemical device comprising short circuit inducing member, and safety evaluation method using same
AssigneeLG Energy Solution, Ltd.
InventorsTae Jong Kim, Seo Young Yoon
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Abstract
The present technology relates to an electrochemical device comprising a separation membrane having a dotted line, and a short circuit inducing member, and a method capable of evaluating safety under internal short circuit conditions by using the electrochemical device. When using the electrochemical device of the present invention, it is possible to easily evaluate safety under internal short circuit conditions without physical deformation of an energy storage apparatus.
Claims12
An electrochemical device comprising a positive electrode, a separator, and a negative electrode are sequentially stacked,
- wherein the separator comprises a linear perforated line,
- a short circuit induction member disposed on one side or both sides of the separator adjacent to the perforated line, and
- the separator is a single layer,
- wherein the short circuit induction member is moved by a magnetic field applied from a position spaced apart from the electrochemical device, and
- wherein the perforated line is capable of broken according to the movement of the short circuit induction member.
A method for evaluating safety according to an internal short circuit of a battery, comprising:
- preparing a separator having a perforated line formed thereon;
- attaching a short circuit induction member including a magnetic material at a position adjacent to the perforated line;
- applying a magnetic field to the short circuit induction member;
- and
- moving the short circuit induction member to expose the perforated line portion,
- wherein the separator is a single layer, and
- wherein the moving the short circuit induction member to expose the perforated line portion induces a short circuit by peeling off the separator along the perforated line, thereby a positive electrode and a negative electrode included in the separator directly contact to each other through a broken portion created by the peeling of the separator.
Dependencies are inferred from the claim text.