Method and cooling system for cooling and extinguishing overheated battery module of high-voltage battery of motor vehicle

Abstract

The invention relates to a cooling system for cooling at least a first battery module and / or a second battery module of a high-voltage battery of a motor vehicle, said cooling system having a line arrangement comprising an input interface, a first outlet and a second outlet, which are assigned to the first battery module and the second battery module, respectively, the pipeline assembly is provided with a branch structure, so that the cooling medium provided at the input interface can be guided to the first outlet through the first pipeline branch and can be guided to the second outlet through the second pipeline branch, and the cooling medium can be selectively led out of the first outlet and / or the second outlet. According to a second aspect of the invention, the line assembly has an expansion device, and the cooling medium expanded by the at least one expansion device can be guided into the interior of the battery housing through the outlet, so that the cooling medium can directly contact at least one cell of the battery module.

Description

technical field [0001] The invention relates to a cooling system for cooling at least a first battery module and / or a second battery module of a high-voltage battery of a motor vehicle, wherein the cooling system has a line assembly comprising an input connection and At least one outlet, an input interface for connecting a container of a cooling medium for cooling at least the first battery module and / or the second battery module, the outlet being assigned to at least the first battery module and / or the second battery module. The invention also includes a corresponding method for cooling at least a first battery module and / or a second battery module of a high-voltage battery of a motor vehicle. Background technique [0002] The invention belongs to the field of high-voltage batteries, in particular for driving motor vehicles, such as electric vehicles and / or hybrid vehicles. In such high-voltage batteries, under certain circumstances, such as in the event of an accident, so...

AI Technical Summary

Problems solved by technology

The disadvantage is that, in order to extinguish the fire, a connection for an external extinguishing agent hose is required, which in turn can usually only be done by the fire brigade

Furthermore, here the respective coolant lines with corresponding openings are led through the battery modules, so that in the event of a fire extinguishing a certain pressure drop occurs along the lines, so that, for example, when two emergency openings are to be opened for extinguishing a fire, the The pressure at the latter opening may not be high enough to extinguish the associated submodule or to open the emergency opening based on pressure at all

[0007] The problem with cooling or extinguishing the high-voltage battery is mainly that, since a large amount of extinguishing agent, also referred to as cooling medium within the scope of the present invention, is required for this, it has to be supplied from an external source, usually by the fire brigade, However this takes a very long time and causes many of the other problems mentioned above

Though cooling or fire extinguishing can be started immediately when this emergency situation takes place by the fire extinguishing agent container inside the motor vehicle, yet because the fire extinguishing agent container inside the motor vehicle is limited by the installation space and cannot accommodate a large amount of fire extinguishing agent, thereby with such a small amount The fire extinguishing agent is just a drop in the bucket for extinguishing or cooling large high-voltage batteries, that is, there is no obvious effect

Due to the installation space, it is not possible to store large quantities of extinguishing agent inside the motor vehicle and this would result in a very high additional weight of the vehicle

Therefore, battery modules for extinguishing or cooling the high-voltage battery in the event of overheating or fire are relatively inefficient both in terms of time and in their effect

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