Battery device for guided cooling of battery cells and a power bus
A battery device for a motor vehicle, in particular an electric motor vehicle, having at least two battery cells and a power bus, which are arranged in an interior of a battery housing and can be temperature-controlled by a flowable coolant arranged in the interior. In an intermediate space between the battery cells, the power bus and a deflector element are arranged, wherein the deflector element includes at least one passage opening for the coolant, which passage opening is arranged in such a way that coolant flowing through the passage opening flows along the power bus.
1 . A battery device for an electric motor vehicle, said battery device comprising:
a battery housing defining an interior;
at least two battery cells and a power bus, which are each arranged in the interior of the battery housing and are configured to be temperature-controlled by a flowable coolant contained in the interior;
a deflector element arranged between the battery cells; and
an intermediate space disposed within the interior at a location between the battery cells,
wherein the power bus, the flowable coolant, electrical connections on the at least two battery cells, and the deflector element are each arranged in the intermediate space,
wherein the deflector element is arranged in the intermediate space such that the deflector element divides the intermediate space into a first subspace in which the power bus and the electrical connections of a first battery cell of the at least two battery cells are positioned and a second subspace in which the electrical connections of a second battery cell of the at least two battery cells are positioned, wherein the deflector element comprises at least one passage opening for the coolant, wherein the at least one passage opening is arranged such that coolant flowing in the first subspace is urged to flow along and in direct contact with the power bus before passing through the at least one passage opening and into the second subspace.
2 . The battery device according to claim 1 , further comprising a perfusable free region for the flowable coolant arranged both below and above the battery cells.
3 . The battery device according to claim 1 , wherein the deflector element is arranged to define a U-shaped flow path of the coolant in the intermediate space and around the power bus.
4 . The battery device according to claim 1 , wherein the deflector element comprises a plurality of passage openings, wherein all of the passage openings are arranged at a common distance from a top of the deflector element.
5 . The battery device according to claim 1 , wherein the passage opening has a cross-section that is circular, elliptical, polygonal, or quadrilateral.
6 . The battery device according to claim 1 , wherein the coolant is guided above the battery cells in a first flow direction, wherein the deflector element is arranged perpendicular to the first flow direction; and/or
wherein the coolant is guided below the battery cells in a second flow direction, wherein the deflector element is arranged perpendicular to the second flow direction.
7 . The battery device according to claim 1 , wherein the power bus electrically connects the at least two battery cells to one another.
8 . The battery device according to claim 1 , wherein the deflector element is sealed against an inner wall and the battery housing.
9 . The battery device according to claim 1 , wherein the battery housing comprises at least one coolant inlet and one coolant outlet that are arranged on opposite sides of the battery device.
10 . The battery device according to claim 1 , further comprising a conveyor device for conveying the coolant in a flow direction.
11 . The battery device according to claim 1 , wherein the first battery cell of the at least two battery cells is arranged to face a first side of the deflector element, and the second battery cell of the at least two battery cells is arranged to face a second side of the deflector element that is opposite the first side.
12 . The battery device according to claim 11 , wherein the battery device comprises at least two first battery cells and/or at least two second battery cells, wherein a cell intermediate channel is arranged between the two first battery cells and the two second battery cells, which cell intermediate channel connects a perfusable free region below the respective battery cells to a perfusable free region above the battery cells.
13 . The battery device according to claim 1 , wherein the coolant is a dielectric fluid.
14 . An electric motor vehicle comprising the battery device of claim 1 .
15 . A method for operating a battery device of an electric motor vehicle having a battery housing defining an interior, at least two battery cells and a power bus, which are each arranged in the interior of the battery housing and are configured to be temperature-controlled by a flowable coolant contained in the interior; a deflector element arranged between the battery cells; and an intermediate space disposed within the interior at a location between the battery cells, wherein the power bus, the flowable coolant, electrical connections on the at least two battery cells, and the deflector element are each arranged in the intermediate space, wherein the deflector element is arranged in the intermediate space such that the deflector element divides the intermediate space into a first subspace in which the power bus and the electrical connections of a first battery cell of the at least two battery cells are positioned and a second subspace in which the electrical connections of a second battery cell of the at least two battery cells are positioned, wherein the deflector element comprises at least one passage opening for the coolant, wherein the at least one passage opening is arranged such that coolant flowing in the first subspace is urged to flow along and in direct contact with the power bus before passing through the at least one passage opening and into the second subspace,
wherein the method comprises the steps of:
delivering the coolant into the first subspace,
flowing the coolant along and in direct contact with the power bus,
after flowing along the power bus, flowing the coolant through the passage opening, and
flowing the coolant into the second subspace.
16 . The method according to claim 15 , wherein the flowing steps together comprise flowing the coolant in a U shape around the deflector element.
17 . The method according to claim 15 , wherein at least the first battery cell of the at least two battery cells is arranged to face a first side of the deflector element, and at least the second battery cell of the at least two battery cells is arranged to face a second side of the deflector element that is opposite the first side, wherein the at least two battery cells comprises at least two of the first battery cells and at least two of the second battery cells, wherein the delivering step comprises flowing coolant (i) through a coolant inlet below the first battery cells and/or the second battery cells and (ii) upwards through at least one cell intermediate channel between the first battery cells and/or the second battery cells and (iii) into the first subspace.
18 . The method according to claim 17 , wherein the method comprises directing the coolant flow from the coolant inlet to the coolant outlet.
19 . The battery device according to claim 1 , wherein the busbar partially blocks the opening.
20 . The battery device according to claim 1 , wherein the deflector element is sealed against an inner wall that runs perpendicular to the deflector element, wherein the inner wall is disposed between the battery cells, wherein the inner wall includes a first opening through which the coolant is delivered into the intermediate space and a second opening through which the coolant is expelled from the intermediate space, and wherein the first opening is positioned to deliver the coolant in a space disposed between the power bus and the first battery cell.