gearbox housing

The development of electric drive assembly is generally divided into four stages from the original independent modules to the integration of all core modules. Before the popularization of the powertrain concept, the reducer, motor, and motor controller were all independent devices, which occupied a large space of the whole vehicle, and the complex line connection caused some losses during circuit transmission, reducing power efficiency. With the development of the powertrain to integration, third-party integrators get rid of the original idea of designing and reassembling the motor, reducer and motor controller separately, and directly carry out the integrated design The integrated structure has the advantages of high torque capacity and higher speed motor, but higher requirements are put forward for the durability of gears and bearings, shell strength, and oil seal sealing, especially the motor controller, whose operating environment changes and reliability requirements are more demanding. In the future, the integration of electric drive assemblies will be further improved, and the corresponding modules of power supply will be added, so integrators need to further increase the compatibility research of each module to ensure the advantages of their own products
Start time: 2016End time: 2017 Stage: embryonic period Industry events: reducers, motors, motor controllers are independent devices Industry impact: reducers, motors, motor controllers are independent devices, occupying large vehicle space, and complex line connections lead to losses during circuit transmission, reducing power efficiency
Start time: 2017End time: 2018 stage: Start-up period Industry events: Integrating the motor into the gearbox Industry impact: The volume of the electric drive assembly is gradually reduced, the weight is reduced, the efficiency is improved, and the endurance of the whole vehicle is improved
Start time: 2018End time: 2019 Stage: high-speed development period Industry events: partially integrated eDrive module industry impact: the volume of the electric drive assembly gradually decreases, the weight decreases, the efficiency is improved, and the vehicle endurance is improved

Start time: 2019End time: 2021 Stage: Mature period industry events: fully integrated eDrive module industry impact: reducer and motor controller separate design and reassembly ideas, directly integrated design

The upstream of China's electric drive powertrain industry chain is a supplier of parts, the value is large, the motor controller research and development is difficult, China's new energy vehicles are mainly equipped with permanent magnet synchronous motors, the value of the motor accounts for 40% of the powertrain, but due to the mature motor technology, so its gross profit margin is low, only 10%. The motor controller is the core component of the electric drive power assembly, and the development is difficult, the value accounts for 10% of the electric drive force assembly, of which the main component 1GBT localization rate is low, the technical threshold is high, of which Infineon accounts for nearly 50% of the market share. The reducer is a pure mechanical component, accounting for 40% of the value of the electric drive assembly, which is mainly composed of steel and aluminum, due to its lower technical door, more competitors, low gross margin, coupled with the rise in raw material prices, the gross profit margin is further reduced, and the value of the bicycle is 1.800 yuan; Midstream is an integrator, the bargaining power is weak, compared with the international electric drive power assembly, there is still a gap in the performance of China's electric drive power assembly, but the gap is gradually narrowing, some Chinese independent brands have been supplied for international electric drive power assembly brands, and are gradually recognized by international enterprises; After the recovery of the epidemic, pent-up demand was released, and China's automobile sales grew rapidly, and new energy vehicle sales in 2020 broke through a new high, increasing to 1.365 million units, a year-on-year increase of 13.5%. Since 2018, pure electric vehicle sales have accounted for more than 80% of the overall new energy vehicle sales, making it the largest category of new energy vehicle sales. Sales of pure electric vehicles are mainly composed of A-class and below. In 2020, 67% of A-class and below sales of pure electric models and 30% of B-segment models will be sold. Affected by policy subsidies and the increase in A-class sales driven by online car hailing, the proportion of A-class vehicles will gradually expand in the future

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