Battery device
A battery device includes a cell stack in which a plurality of battery cells are stacked, a first plate having a gas inlet and having a first surface on which the cell stack is disposed, at least one cooling flow path disposed on a second surface of the first plate, and at least one venting flow path disposed on the second surface of the first plate and formed in a space between the cooling flow paths to be connected to the gas inlet.
1 . A battery device comprising:
a cell stack in which a plurality of battery cells are stacked;
a cooling member cooling the cell stack;
a sidewall portion surrounding a side surface of the cell stack and coupled to the cooling member;
an expanded flow path provided in the sidewall portion; and
a gas outlet coupled to the sidewall portion to be connected to the expanded flow path,
wherein the cooling member comprises:
a first plate having a gas inlet and having a first surface on which the cell stack is disposed;
a second plate spaced apart from the first plate by a predetermined distance,
at least one cooling flow path disposed on a second surface of the first plate; and
at least one venting flow path disposed on the second surface of the first plate and formed in a space between the cooling flow paths,
wherein the cooling flow path and the venting flow path are formed between the first plate and the second plate, and
wherein the gas outlet is connected to the at least one venting flow path through a side portion of the cooling member formed between the first plate and the second plate,
wherein the venting flow path is divided into a first venting flow path and a second venting flow path by the cooling flow path,
wherein the first venting flow path and the second venting flow path are formed as independent flow paths not connected to each other within the cooling member, and
wherein the first venting flow path and the second venting flow path are connected to each other through the expanded flow path.
2 . The battery device of claim 1 , wherein the cooling flow path is formed integrally with the first plate and the second plate.
3 . The battery device of claim 1 , wherein
the cooling flow path is formed integrally with the first plate, and
a space formed between the cooling flow path and the second plate is used as the venting flow path.
4 . The battery device of claim 1 , further comprising:
a reinforcing member coupled to a portion of the sidewall portion opposing the cell stack,
wherein the reinforcing member is formed of a material having a melting point higher than that of the sidewall portion.
5 . The battery device of claim 1 , wherein the cooling flow path includes:
a first flow path formed integrally with the first plate and the second plate; and
a second flow path formed integrally with the first plate, the second flow path having at least one portion spaced apart from the second plate by a predetermined distance.
6 . The battery device of claim 5 , wherein
the first flow path is a flow path formed to have a meandering shape, and
the second flow path is a flow path connecting the first flow path and a gas outlet to each other.
7 . The battery device of claim 5 , wherein the second flow path is a flow path disposed on an outermost side of the cooling flow path.
8 . The battery device of claim 7 , wherein
a plurality of first flow paths is dispersedly disposed, and
the second flow path is branched into a plurality of second flow paths, and the plurality of second flow paths are connected to the plurality of first flow paths, respectively.
9 . The battery device of claim 1 , comprising:
a first gas outlet connected to the first venting flow path; and
a second gas outlet connected to the second venting flow path.
10 . The battery device of claim 1 , wherein
the cell stack includes at least one terminal, and
the gas inlet is formed in a region of the first plate positioned below the terminal.
11 . The battery device of claim 1 , wherein
a cross-section of each of the cooling flow path and the venting flow path is formed to have a triangular shape, and
the cooling flow path has one triangular side formed by the cooling flow path, and the venting flow path has one triangular side formed by the second plate.