Pattern fuse including opening and battery module including the same
AssigneeLG Energy Solution, Ltd.
InventorsChang Bog Lee, Sang Eun Jung
Life of this patent
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Abstract
The present invention relates to a pattern fuse including a flame retardant coating layer and an opening, the pattern fuse being configured to prevent fire outbreak due to overcurrent generated when a circuit pattern is operated and to designate a breakage position, a flexible printed circuit board including the same, and a battery module including the same, wherein it is possible to prevent fire outbreak even when the pattern fuse is heated to a high temperature as the result of operation of the pattern fuse, and the pattern fuse is broken by fusing at a specific position thereof.
Claims9
A pattern fuse comprising:
- a first electroconductive line portion having a predetermined length configured to block current to inhibit breakage of functional elements;
- a first film layer;
- at least one opening formed in the first film layer,
- wherein the first electroconductive line portion is located in the at least one opening;
- a flame retardant coating layer formed on a first surface of the first film layer;
- an adhesive layer formed on a second surface of the first film layer, the first electroconductive line portion being formed on the adhesive layer abutting the second surface;
- and
- a second film layer formed on a surface of the adhesive layer opposite a surface of the adhesive layer on which the first electroconductive line portion is formed,
- wherein adhesion between the first electroconductive line portion and the adhesive layer is greater than adhesion between the first electroconductive line portion and the coating layer,
- wherein a melting point of the coating layer is higher than a melting portion of the first film layer, and a thermal conductivity of the coating layer is lower than a thermal conductivity of the first film layer, and
- wherein the thermal conductivity of the coating layer is 0.10 W/mk or less.
A battery module comprising:
- a battery cell;
- a battery management system configured to monitor voltage, current, and temperature of the battery cell;
- and
- a flexible printed circuit board connected to the battery cell and the battery management system, wherein
- the flexible printed circuit board comprises a pattern fuse comprising:
- a first electroconductive line portion having a predetermined length configured to block current to inhibit breakage of function elements, the first electroconductive line portion being aligned with at least one opening formed in a first film layer;
- a flame retardant coating layer formed on a first surface of the first film layer;
- an adhesive layer formed on a second surface of the first film layer, the first electroconductive line portion being formed on the adhesive layer abutting the second surface;
- and
- a second film layer formed on a surface of the adhesive layer opposite a surface of the adhesive layer on which the first electroconductive line portion is formed,
- wherein adhesion between the first electroconductive line portion and the adhesive layer is greater than adhesion between the first electroconductive line portion and the coating layer,
- wherein a melting point of the coating layer is higher than a melting point of the first film layer, and a thermal conductivity of the coating layer is lower than a thermal conductivity of the first film layer, and
- wherein the thermal conductivity of the coating layer is 0.10 W/mk or less.
Dependencies are inferred from the claim text.