Overview of core precision parts of new energy vehicles

With the enhancement of global awareness of environmental protection and the transformation and upgrading of energy structure, new energy vehicles, as the representative of green travel, are changing our travel mode at an unprecedented speed.

### Overview of core precision parts of new energy vehicles

With the enhancement of global awareness of environmental protection and the transformation and upgrading of energy structure, new energy vehicles, as the representative of green travel, are changing our travel mode at an unprecedented speed. New energy vehicles, especially electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV), have breakthroughs in their core technologies that are inseparable from the manufacturing level of precision parts. This article will provide an in-depth overview of several core precision parts in new energy vehicles and discuss their key role in promoting the development of new energy vehicle industry.

#### 1. power battery system: the heart of the energy source The power battery system is the core component of new energy vehicles and is known as the "heart of electric vehicles". Its core precision parts include batteries, battery management systems (BMS) and battery pack structural parts. As a unit for storing electrical energy, the performance of the battery cell directly determines the cruising range and safety of electric vehicles. At present, lithium-ion batteries have become the mainstream choice because of their high energy density and long cycle life, while new technologies such as solid-state batteries are gradually moving towards commercialization, indicating the future of higher energy density and safety.

BMS is like the "brain" of the battery, responsible for monitoring the battery status, optimizing energy distribution, protecting the battery from damage, and ensuring the safe and efficient operation of the battery system. High-precision sensors, complex algorithms and reliable communication modules form the precise architecture of BMS.

The battery pack structure is responsible for protecting the battery cell from external impact, while providing a heat dissipation path to ensure that the battery pack can still work stably in extreme environments. The application of lightweight materials such as aluminum alloys and composite materials, as well as sophisticated manufacturing processes, make the battery pack both strong and lightweight.

#### 2. drive motor and controller: the essence of power conversion Drive motors and their controllers are the key to the power system of new energy vehicles. They efficiently convert the electrical energy in the battery into mechanical energy to drive the vehicle forward. Permanent magnet synchronous motor (PMSM) has become the first choice for electric vehicles because of its high efficiency and high power density. Its core precision parts include motor stator, rotor, bearing and electronic control unit (ECU).

The stator and rotor of the motor are designed and manufactured with extreme precision to ensure maximum electromagnetic conversion efficiency while reducing noise and vibration. High-performance bearings ensure the stability and durability of the motor under high-speed rotation. ECU is responsible for receiving driving instructions, accurately controlling the speed and torque output of the motor, and realizing the acceleration, deceleration and braking of the vehicle. It integrates complex control algorithms and high-speed processing chips.

#### 3. reducer and transmission system: The bridge of power transmission Although some electric vehicles use direct drive, more models still need to use reducers to optimize power output and improve driving experience. The reducer converts the high-speed and low-torque power of the motor into low-speed and high-torque power suitable for vehicle driving through precision mechanisms such as gears or planetary gear trains. Its internal gears, bearings and other parts need to undergo fine processing and strict assembly to ensure transmission efficiency and stability.

For hybrid vehicles, the transmission system also includes complex mechanisms such as clutches and transmissions. They need to maintain efficient and stable operation under complex working conditions such as oil-electric switching and power coupling, which puts forward higher requirements for the accuracy and reliability of parts.

#### 4. thermal management system: the guardian of temperature control The efficient operation of new energy vehicles cannot be separated from the support of the thermal management system. The system uses precision parts such as coolant circulation, heat exchangers, fans and thermostats to accurately control the temperature of key components such as batteries, motors, and electronic controls to ensure that they operate within the optimal operating temperature range and extend their service life. Improve overall performance. Especially in extremely cold or extremely hot environments, the performance of the thermal management system is particularly important.