The performance indicators of new energy vehicles are becoming more and more demanding in terms of lightweight, cost reduction and space layout optimization, and the integrated products of electric drive systems have become the development trend of the industry.The electric drive system of new energy vehicles has undergone the development process from discrete to functional integration, to mechatronics. Relying on breakthroughs and innovations in key technologies to improve system integration, it has become the consensus of the new energy vehicle industry.

System performance and cost control have become the core factors considered in different integration solutions.New energy vehicle electric drive systems have different integration paths, and they need to be selectively packaged based on factors such as system performance, cost control, compactness, maintainability, supply chain management, and flexibility.The common ”big three electric" integration is mainly a three-in-one system of motor, electronic control, and reducer. The representative manufacturers are NIDEC and NIO.The common ”small three-power" integration is mainly a three-in-one system of on-board charger, DC/DC converter, and high-voltage power distribution unit. The representative manufacturers are Weimax and Inboer.Further, the all-in-one electric drive, on the basis of the three-in-one system, each company selectively packages according to its own technical route.There are six-in-one electric drives that integrate “Big three batteries” and “small three batteries”, and there are also “all-in-one electric drives” that integrate “big three batteries”, “small three batteries”, battery management systems, and vehicle controllers with a closer high-voltage system. The representative is BYD 8-in-1, Huawei 7-in-1.There are also extended battery pack integration solutions that incorporate the “small three batteries” assembly into the battery pack, which means that the manufacturer is Tesla.With the evolution of integrated technology, there is also the possibility of encapsulation into the assembly of electric compressors and thermal management units in the future.