Battery device with protection against fire propagation
A battery device ( 3 ) is provided. The battery device comprises a casing having a plurality of sides ( 10 a - 10 f ) including a bottom side, a top side opposite to said bottom side, two lateral sides, a front side, and a rear side opposite to said front side, wherein the plurality of sides are assembled to form a sealed container, and a battery cell pack ( 20 ) located within the sealed container. The casing comprises at least one outlet ( 31 ) arranged at at least one of the plurality of sides. The sealed container is configured to prevent heated gases generated upon a malfunction of the battery cell pack from escaping the casing except via the at least one outlet. The battery device further comprises a filter ( 13 ) arranged at said at least one outlet for limiting at least flames from escaping the casing, and terminals for connection of the battery device to a load, another battery device or an external power source, arranged at the front side, and wherein said at least one outlet is arranged at the rear side of the casing.
1 . A battery device comprising:
a casing having a plurality of sides including a bottom side, a top side opposite to said bottom side, two lateral sides, a front side, and a rear side opposite to said front side, wherein the plurality of sides are assembled to form a sealed container, wherein the top side, the bottom side, and the lateral sides extend beyond the front side to form a compartment coupled to and distinct from the sealed container, the casing comprising at least one outlet arranged at the rear side of the casing;
a front panel arranged in front of the front side of the casing to form the compartment; and
a battery cell pack located within the sealed container,
wherein the sealed container is configured to prevent heated gases generated upon a malfunction of the battery cell pack from escaping the casing except via said at least one outlet,
wherein a filter is arranged at said at least one outlet for limiting at least flames from escaping said casing, and
wherein terminals for connection of the battery device to a load, another battery device or an external power source are arranged at the front panel.
2 . The battery device of claim 1 , wherein the filter comprises a flame-retardant and high-temperature resistant material.
3 . The battery device of claim 1 , wherein the plurality of sides of the casing includes high-temperature resistant and/or flame-resistant material.
4 . The battery device of claim 1 , wherein the plurality of sides of the casing is assembled together along a plurality of joints, and wherein a sealing element is arranged at the plurality of joints.
5 . The battery device of claim 1 , wherein the plurality of sides of the casing are hermetically welded together to form the sealed container.
6 . The battery device of claim 1 , wherein the sealed container is delimited by the plurality of sides of the casing.
7 . The battery device according to claim 1 , wherein the battery cell pack is disposed within the casing such that heated gases are directed towards the outlet via at least a passage located between the battery cell pack and the top side of the casing or between the battery cell pack and the bottom side of the casing.
8 . The battery device according to claim 1 , wherein the casing includes a single outlet located at the rear side of the casing.
9 . The battery device according to claim 1 , wherein said at least one outlet occupies at least 25% of the area of the rear side of the casing.
10 . The battery device according to claim 1 , wherein the battery cell pack includes an arrangement of Lithium-ion based battery cells.
11 . The battery device according to claim 1 , wherein the battery cell pack occupies approximately 40-90% of the volume of the sealed container.
12 . The battery device according to claim 1 , wherein the battery device is configured to operate in a charging mode during which the battery cell pack is charged by the external power source and in a discharging mode during which power is provided by the battery device to the load.