Hybrid circuit board and battery pack having same
Embodiments of the present disclosure relate to a hybrid circuit board and a battery pack having the same. The battery pack includes: a plurality of battery cells arranged in one direction, each of the battery cells including a positive electrode terminal and a negative electrode terminal; a plurality of busbars electrically connected to the positive electrode terminal or the negative electrode terminal of each of the battery cells; and a hybrid circuit board including a rigid substrate and a flexible substrate that is coupled to the rigid substrate and is electrically connected to the busbars. The rigid substrate is arranged between the busbars and the flexible substrate.
1 . A hybrid circuit board comprising:
a flexible substrate comprising a flexible material and a plurality of tab connection portions extending outwardly from an edge of the flexible material, the tab connection portions being electrically connected to a plurality of busbars, the busbars electrically connecting a plurality of battery cells; and
a rigid substrate comprising a rigid material, the rigid substrate being coupled to the flexible substrate to support the flexible substrate,
wherein the flexible substrate has a first shape portion formed at both sides of a first tab connection portion from among the tab connection portions, the first shape portion being concavely cut inwardly from the edge of the flexible substrate, and
wherein the rigid substrate has a support portion supporting only a proximal portion of the first tab connection portion at where it connects to the flexible substrate.
2 . The hybrid circuit board of claim 1 ,
wherein a substrate tab is electrically connected to each of the tab connection portions and the busbars.
3 . The hybrid circuit board of claim 2 , wherein one end of each of the substrate tabs is soldered to a corresponding one of the tab connection portions, and the other end thereof is laser-welded to one of the busbars.
4 . The hybrid circuit board of claim 2 , wherein the flexible substrate has a second shape portion extending from the edge of the flexible substrate in an ‘S’ shape and being integrally formed with a second tab connection portion from among the tab connection portions.
5 . The hybrid circuit board of claim 2 , further comprising a sensor connection portion extending in an ‘S’ shape from the edge of the flexible substrate,
wherein the sensor connection portion comprises:
a temperature sensor configured to measure a temperature of at least one of the battery cells;
a foam pad accommodating the temperature sensor; and
a metal tab coupled to the foam pad and connected to the temperature sensor and the at least one of the battery cells.
6 . A battery pack comprising:
a plurality of battery cells arranged in one direction, each of the battery cells comprising a positive electrode terminal and a negative electrode terminal;
a plurality of busbars electrically connected to the positive electrode terminal or the negative electrode terminal of each of the battery cells; and
a hybrid circuit board comprising a rigid substrate and a flexible substrate coupled to the rigid substrate and comprising a plurality of tab connection portions extending outwardly from edges of the flexible substrate and electrically connected to the busbars, the rigid substrate being between the busbars and the flexible substrate,
wherein the flexible substrate has a first shape portion at both sides of at least one of the tab connection portions, the first shape portion being concavely cut inwardly from one of the corresponding edges of the flexible substrate, and
wherein the rigid substrate has a support portion supporting only a proximal portion of the at least one of the tab connection portions at where the at least one of the tab connection portions connects to the flexible substrate.
7 . The battery pack of claim 6 , wherein the flexible substrate comprises
a substrate tab electrically connected to each of the tab connection portions and one of the busbars.
8 . The battery pack of claim 7 , wherein the flexible substrate has a second shape portion extending from one of the edges of the flexible substrate in an ‘S’ shape and integrally formed with another one of the tab connection portions.
9 . The battery pack of claim 7 , wherein one end of the substrate tab is soldered to a corresponding one of the tab connection portions, and the other end thereof is laser-welded to one of the busbars.
10 . The battery pack of claim 9 , further comprising a sensor connection portion extending in an ‘S’ shape from one of the edges of the flexible substrate,
wherein the sensor connection portion comprises:
a temperature sensor configured to measure a temperature of at least one of the battery cells;
a foam pad accommodating the temperature sensor; and
a metal tab coupled to the foam pad and connected to the temperature sensor and the at least one of the battery cells.
11 . The hybrid circuit board of claim 1 , wherein the rigid substrate has a first shape portion formed at both sides of the support portion and corresponding in shape to and overlapping the first shape portion formed in the flexible substrate.
12 . The battery pack of claim 6 , wherein the rigid substrate has a first shape portion formed at both sides of the support portion and corresponding in shape to and overlapping the first shape portion formed in the flexible substrate.