US 2019/0296314 A1Published application

Battery module for a motor vehicle

AssigneeDeutsche Post AG

InventorsStephan Hartmann, Nils Armbruster, Alejandro Lorca Mouliaà

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Abstract

The subject matter of the invention is a battery module for a motor vehicle having a multiplicity of battery cells, each having a first pole and a second pole and a contact plate which extends in a transverse direction and in a longitudinal direction, wherein a first group of the battery cells are connected via their respective first pole, one after the other to a first side, extending in the longitudinal direction, of the contact plate, and a remaining second group of the battery cells are connected by their respective second pole, one after the other to a second side, extending in the longitudinal direction, of the contact plate, with the result that, by means of the contact plate the first group of the battery cells are connected via the first poles, and the second group of the battery cells are connected via the second poles, in parallel, and the first group of the battery cells and the second group of the battery cells are connected in series, and between adjacent first poles on the first side and/or between adjacent second poles on the second side, at least one cutout, extending in the transverse direction, is provided in the contact plate, with a length such that the ratio of the resistance of the contact plate in the extent in the longitudinal direction with respect to the resistance of the contact plate in the extent in the transverse direction is ≥2.

Claims11

Dependent claims

Battery module having a multiplicity of battery cells, each having a first pole and a second pole and a contact plate which extends in a transverse direction and in a longitudinal direction, wherein

a first group of the battery cells are connected by their respective first pole one next to the other to a first side, extending in the longitudinal direction, of the contact plate, and a remaining second group of the battery cells are connected by their respective second pole one next to the other to a second side, extending in the longitudinal direction, of the contact plate, with the result that, by means of the contact plate, the first group of the battery cells are connected in parallel via the first poles, and the second group of the battery cells are connected in parallel via the second poles, and the first group of the battery cells and the second group of the battery cells are connected in series,
in each case three adjacent battery cells of the first group and of the second group are arranged offset with respect to one another in the manner of a triangle, and a first cutout in the contact plate is provided between the three adjacent battery cells, and
when there are two battery cells in the first group a second cutout extends away from the first cutout between the two battery cells of the first group in the direction of the first side, and a third cutout extends away in the direction of the second side from the first cutout between one of the two battery cells of the first group and the battery cell of the second group and/or between the battery cell of the second group and a further adjacent battery cell of the second group, with the result that owing to the second and third cutouts the ratio of the resistance of the contact plate in the extent in the longitudinal direction with respect to the resistance of the contact plate in the extent in the transverse direction is ≥2.

Method for reducing currents in the longitudinal direction of a contact plate, extending in a transverse direction and in the longitudinal direction, of a battery module, with which a multiplicity of battery cells, each having a first pole and a second pole, can be connected, wherein

a first group of the battery cells are connected by their respective first pole one next to the other to a first side, extending in the longitudinal direction, of the contact plate, and a remaining second group of the battery cells are connected by their respective second pole one next to the other to a second side, extending in the longitudinal direction, of the contact plate, with the result that, by means of the contact plate, the first group of the battery cells are connected in parallel via the first poles, and the second group of the battery cells are connected in parallel via the second poles, and the first group of the battery cells and the second group of the battery cells are connected in series, and in each case three adjacent battery cells of the first group and of the second group are arranged offset with respect to one another in the manner of a triangle, having the step:
forming a first cutout into the contact plate, between the three adjacent battery cells, forming, when there are two battery cells in the first group, a second cutout from the first cutout, between the two battery cells of the first group in the direction of the first side, and forming from the first cutout a third cutout between one of the two battery cells of the first group and the battery cell of the second group and/or between the battery cell of the second group and a further adjacent battery cell of the second group in the direction of the second side with a respective length in such a way that, owing to the second and third cutouts, the ratio of the resistance of the contact plate in the extent in the longitudinal direction with respect to the resistance of the contact plate in the extent in the transverse direction is ≥2.

Dependencies are inferred from the claim text.

Facts

Application: 16/364,325Filed 26 Mar 2019
Priority: DE 10 2018 107 091.826 Mar 2018
Published: 26 Sep 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H01M 50/509
Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing: characterised by…
H01M 50/213
Characterised by their shape: adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/503
Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing: characterised by…
H01M 2220/20
Batteries for particular applications: batteries in motive systems, e.g. vehicle, ship, plane