Battery cells and battery modules

Abstract

The invention relates to a battery cell (1) with a cell casing (2), the cell casing having a bottom (3), a cover (4) and connecting the bottom (3) and the cover (4) Connected side walls (5, 6, 7, 8), wherein the cover (4) is configured to extend in the longitudinal direction and has two openings arranged along its longitudinal extension and two openings arranged opposite to each other with reference to its longitudinal extension , wherein the positive connection electrode (9, 10) of the battery cell (1) is led through an opening and the negative connection electrode (9, 10) of the battery cell (1) is led through Another opening, wherein the connecting electrodes (9, 10) protrude to a predeterminable size from the upper side of the cover (4) facing away from the interior of the cell housing (2), wherein the connecting electrodes (9, 10) The first connection electrode (9) is arranged closer to the first end of the two ends of the cover (4), rather than closer to the second of the two ends of the cover (4), And wherein, the second connection electrode (10) of the connection electrodes (9, 10) is arranged closer to the second end of the cover (4) than to the first end of the cover (4), which Characteristic in that the distance between the first connecting electrode (9) and the first end of the cover (4) is greater than the distance between the second connecting electrode (10) and the second end of the cover (4) .

Description

technical field [0001] The invention relates to a battery cell and a battery module. Background technique [0002] In electrically driven motor vehicles, in particular electric vehicles and hybrid vehicles, the battery is used to supply the electric drive of the motor vehicle with electrical energy. Batteries of this type are usually formed by joining a number of battery modules connected in series. Each battery module usually has a plurality of battery cells connected in series, which are usually based on lithium. Each battery cell includes a cell housing and an electrochemical cell disposed in the cell housing. Arranged on one side of the cell housing are connecting electrodes via which electrical energy can be extracted from the battery cells or via which electrical energy can be supplied to the battery cells. The connecting electrodes of the battery cells are made, for example, of aluminum or copper. The connecting electrodes can be made of the same material or of di...

AI Technical Summary

Problems solved by technology

As a result, reliable electrical insulation between connection electrodes cannot be achieved.

Furthermore, during the assembly of a correspondingly configured battery module, an unintentional short circuit may result if an electrically conductive tool used for the assembly electrically conductively connects the two terminal electrodes to one another.

In addition, the accessibility of the tools for assembling the battery cells is hampered by the small distance between the connection electrodes

Images