Cooling device for a battery system, in particular of a motor vehicle

A battery system with integrated cooling function, comprising:

• at least a first and a second battery unit,
• a cooling device, including:
• at least a first cooling plate and a second cooling plate respectively flowable through by a coolant,
• the first and second cooling plates respectively including a first fluid inlet connected fluidically with a first fluid outlet via a first fluid duct extending along an extent direction, and a second fluid inlet connected fluidically with a second fluid outlet via a second fluid duct extending along the extent direction,
• wherein the fluid inlets and the fluid outlets of the cooling plates are connected with one another such that in a least one cooling plate the coolant flowing in the extent direction of the respective cooling plate through the first fluid duct flows opposite to the extent direction through the second fluid duct of the same cooling plate, or vice versa,
• wherein each battery unit is thermally coupled respectively with an associated cooling plate.

An air conditioning circuit for a motor vehicle, comprising:

• a compressor for compressing a coolant,
• a condenser, arranged downstream of the compressor, for cooling the compressed coolant,
• a vaporizer, arranged upstream of the compressor, which has a vaporizer inlet and a vaporizer outlet,
• a battery system, including:
• a cooling device including at least a first cooling plate and a second cooling plate, which are flowable through by the coolant and are arranged respectively for thermal coupling with a respective battery unit,
• wherein the first and second cooling plate respectively include a first fluid inlet which is connected fluidically with a first fluid outlet via a first fluid duct extending along an extent direction, and a second fluid inlet which is connected fluidically with a second fluid outlet via a second fluid duct extending along the axial direction, the fluid ducts of the first and second cooling plate connected fluidically with one another such that the coolant flows successively through the fluid ducts of at least two different cooling plates,
• wherein at least one of the first fluid duct and the second fluid duct is composed of at least two flat tubes extending along a longitudinal direction of the cooling plate and mounted on the cooling plate,
• wherein the fluid inlets and the fluid outlets of the cooling plates are connected with one another such that in at least one cooling plate a coolant flowing in the extent direction of the respective cooling plate through the flat tubes of the first fluid duct flows contrary to the extent direction through the flat tubes of the second fluid duct of the same cooling plate, or vice versa,
• at least two battery units, wherein each battery unit is thermally coupled with an associated cooling plate, and
• wherein the cooling device communicates fluidically with the vaporizer inlet and with the vaporizer outlet.