Bayerische Motoren Werke Aktiengesellschaft

Philip Kotter

Tuncay Idikurt

Alexander Muck

Robert Lustig

Thomas Hoefler

Daniel Scherer

Ruediger Daub

Christoph Born

Christian Zachar

Anas Mnif

Bernhard Nitschke

Thomas HÖFLER

An accumulator assembly includes first and second accumulator cells, each of which includes at least one electrical connection element. The accumulator assembly also includes a cell connector element which electrically connects the electrical connection element of the first accumulator cell with the electrical connection element of the second accumulator cell. The cell connector element is welded at least onto one of the electrical connection elements via a plurality of welding locations. The number and the location of the welding locations are selected according to an expected current density in such a way that more welding locations are arranged at locations with a higher expected current density, and zero or fewer welding locations are arranged at locations with a lower expected current density.

Accumulator assembly with an improved welding technique for a cell connector element

A cell module for a battery of a motor vehicle has a plurality of battery cells for storing electrical energy and a module frame which includes at least two pressure elements, between which the battery cells are arranged, and at least one tension rod which is loaded in tension. The tension rod is formed from a material and by which the pressure elements are clamped against each other via the battery cells. As a result, the battery cells are compressed, wherein the pressure plates are clamped against each other by the tension rod in such a manner that a yield strength or the 0.2% yield limit of the material of the tension rod is reached.

Cell module for a battery of a motor vehicle and method for producing such a cell module

A connector system for a battery module has a number of cell connectors of different successive cell connector types in order to form one or more electric contacts with one or more connections of one or more individual cells of the battery module, in particular for a power-transmitting tap in which each cell connector of a subsequent cell connector type is designed to electrically connect a larger number of connections of individual cells than the number of connections which can be connected by each cell connector of a preceding cell connector type. Each cell connector of a preceding cell connector type can be stacked and/or nested on a cell connector of a subsequent cell connector type in an assembly direction perpendicular to the main direction of extension.

Connector system, battery module, method for forming a tap, and operating device

The invention relates to a device for producing an electrically conductive connection between two battery modules of an electrically drivable motor vehicle, comprising at least one clamping unit, which is composed of metal and can be clamped to a connection pole of a battery cell of a battery module or can be clamped to a cell connector that is arranged on the connection pole and that connects the connection pole in an electrically conductive manner to a connection pole of a further battery cell of the battery module.

Connection between two battery modules of a battery system

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Munich, Germany

Philip Kotter