Ultra-compact coil Atam for batteries cooling in electric vehiclesERT

Atam developed an ultra-compact integrated solution combining coil and electrical connectors, to work under the bonnet of hybrid and electric vehicles regulating the cooling circuits of their lithium batteries.

The solution guarantees cutting-edge performance to the main devices responsible for under bonnet thermal management such as chillers, refrigerant pumps and shut-off valves. In order to function efficiently over long periods, the batteries of hybrid and electric cars must be able to maintain an optimal temperature, as constant as possible in a range between +20 °C and -40 °C, regardless of the outside temperature.

Atam’s ultra-compact solution is offered with different electrical parameters and types of connection to satisfy all motor types. The 22 mm coil and the overall dimensions of the winding are specifically designed to ensure all the force, linked to the number of turns, and the tolerance necessary, to adjust the valve. Space optimisation also exploits the geometry of the connector with the terminals encapsulated in the coil to form a single body. The employ of class H materials used for encapsulation offers an IP69K degree of protection, which have demonstrated optimal resistance to cracking and material failure.

The choice of materials has finally been the subject of careful studies at the Atam testing laboratory, equipped with a new double compartment climatic chamber allowing heat adjustment between +50/+220° C and cold adjustment between -80° C and +100° C. The testing procedures are capable of subjecting the samples to sudden thermal shocks in just 10 seconds, simulating the most severe field operating conditions.

In addition to testing and validating different types of materials, the new equipment is essential for collecting data relating to the different production stages based on the most rigid criteria or specific customer requests.