Bus bar assembly and frame assembly
A bus bar assembly installed in a frame for fixing a plurality of stacked battery cells is provided. The bus bar assembly may include: a bus bar fixed to the frame; a flexible printed circuit board electrically connected to the bus bar and configured to sense the plurality of battery cells; and a connection terminal having a protrusion formed on one surface of the connection terminal, is the protrusion being configured to pass through the flexible printed circuit board so as to be electrically connected to the flexible printed circuit board, and the connection terminal configured to be electrically connected to the bus bar through the opposite surface of the one surface, the opposite surface being bonded to the bus bar.
1. A bus bar assembly installed in a frame for fixing a plurality of stacked battery cells, the bus bar assembly comprising:
a bus bar fixed to an outside of the frame;
a flexible printed circuit board electrically connected to the bus bar and configured to sense the plurality of the stacked battery cells; and
a connection terminal including:
a first surface facing in a first direction and being in contact with the flexible printed circuit board;
a protrusion protruding in the first direction, the protrusion formed on the first surface and configured to pass through the flexible printed circuit board so as to be electrically connected to the flexible printed circuit board; and
a second surface facing in a second direction, which is opposite to the first direction, the second surface being in contact with the bus bar so that the connection terminal is configured to be electrically connected to the bus bar through the second surface.
2. The bus bar assembly of claim 1 , wherein the connection terminal comprises:
a bonding portion comprising the first surface and the second surface bonded to the bus bar; and
an engaging portion having the protrusion formed therein and extending from the bonding portion so as to be coupled to the flexible printed circuit board by means of a lap joint.
3. The bus bar assembly of claim 1 , wherein a plurality of protrusions is provided to face each other, and
wherein the plurality of protrusions passes through predetermined positions of the flexible printed circuit board and passing and protruding portions of the plurality of protrusions are pressed to be bent.
4. The bus bar assembly of claim 2 , wherein the second surface is disposed adjacent to the bus bar, and
wherein the second surface is bonded to the bus bar by applying a welding process to the first surface.
5. The bus bar assembly of claim 1 , wherein the bus bar has a recess formed therein to receive the connection terminal.
6. The bus bar assembly of claim 1 , wherein a conformal coating process is performed so as to cover the connection terminal and a portion of the bus bar around the connection terminal in a state in which the connection terminal is bonded to the bus bar.
7. The bus bar assembly of claim 1 , further comprising:
an engaging member configured to pass through the connection terminal and the bus bar so as to fix the connection terminal to the bus bar.
8. The bus bar assembly of claim 7 , wherein the connection terminal comprises:
a contact portion including a ring portion having a hole through which the engaging member passes and configured to come into contact with the bus bar; and
an engaging portion having the protrusion formed therein and extending from the contact portion so as to be coupled to the flexible printed circuit board by means of a lap joint.