Battery module having improved safety and operational lifespan
View Patent ↗The present disclosure discloses a battery module capable of preventing a battery cell from being damaged by vibration or impact. The battery module according to the present disclosure is characterized such that it includes a battery cell, a first cover disposed adjacent to the battery cell to cover one surface of the battery cell, and a first elastic member having elasticity, which is interposed between the battery cell and the first cover.
1. A battery module, comprising:
a battery cell having at least one positive electrode plate, at least one separator, and at least one negative electrode plate stacked in a first direction;
a first cover disposed adjacent to the battery cell to cover one surface of the battery cell; and
a first elastic member having elasticity and being interposed between the battery cell and the first cover along the first direction,
wherein the first elastic member is an elastic mat having a predetermined thickness and comprising two or more springs therein,
wherein some of the springs have a different modulus of elasticity from the rest of the springs.
2. A battery module, comprising:
a battery cell having at least one positive electrode plate, at least one separator, and at least one negative electrode plate stacked in a first direction;
a first cover disposed adjacent to the battery cell to cover one surface of the battery cell; and
a first elastic member having elasticity and being interposed between the battery cell and the first cover along the first direction,
wherein the first elastic member is an elastic mat having a predetermined thickness, wherein an interior of the elastic mat is filled with two or more springs,
wherein the springs are densely formed at a center portion of the elastic mat.
3. The battery module of claim 1 , wherein the some of the springs have a relatively greater modulus of elasticity than the rest of springs, and are disposed at a center portion of the elastic mat.
4. The battery module of claim 1 , wherein the first cover has a plate shape and is made from a metal.
5. The battery module of claim 1 , further comprising:
a second cover disposed adjacent to the battery cell to cover other surface of the battery cell; and
a second elastic member having elasticity and being interposed between the battery cell and the second cover.
6. An electric vehicle comprising the battery module according to claim 1 .
7. The battery module of claim 2 , wherein the first cover has a plate shape and is made from a metal.
8. The battery module of claim 2 , further comprising:
a second cover disposed adjacent to the battery cell to cover other surface of the battery cell; and
a second elastic member having elasticity and being interposed between the battery cell and the second cover.
9. An electric vehicle comprising the battery module according to claim 2 .
10. The battery module of claim 2 , wherein the elastic mat includes a mat cover surrounding the two or more springs.
11. The battery module of claim 10 , wherein the mat cover is made of fabric.
12. The battery module of claim 10 , wherein the elastic mat includes a spring frame to support and fix the positions of the two or more springs.
13. The battery module of claim 12 , wherein the spring frame includes holes in which respective springs of the two or more springs are disposed.
14. The battery module of claim 12 , wherein the spring frame includes a filler between the spring frame and the mat cover.
15. The battery module of claim 14 , wherein the filler is a sponge.