In recent years, with the continuous development of new energy vehicles, the company actively responded to the national call for energy conservation and emission reduction, promoted the use of new energy and developed circular economy. Automobile manufacturers have launched their own new energy vehicle products, including pure electric vehicles and hybrid vehicles. With the gradual progress of technology, electricity has gradually replaced traditional fuel as the power source of automobiles. There are various design problems and the birth of new design concepts in the design and research of the wiring harness in the power battery pack of new energy vehicles. As the signal transmission of the power battery, the power tool harness in the battery pack realizes the effective output of the power battery and effectively monitors the power consumption and travel of the power battery in the battery pack. In the design process, it also faces the test of design scheme, layout direction, EMC protection and other design aspects.

Automobile power tool harness is the main body of automobile circuit network. No wiring harness, no car circuit. With the improvement of people's requirements for automobile performance, economy and emission, automotive wiring harness becomes more and more complex, but the space of wiring harness in the car body is less and less. Therefore, how to improve the comprehensive performance design of automotive power tool harness has become the focus of people's attention.

At present, the number and structure of modules and monomers in the battery pack are determined according to the early design goals of the power battery pack for new energy vehicles. The cooling forms of battery pack are divided into air-cooled battery pack and water-cooled battery pack. In the design of packaged power tool harness, there are high-voltage harness and low-voltage harness, which are different from the traditional power tool harness for gasoline vehicles. Different forms of internal wiring harnesses of battery packs adopt different design methods and layout schemes.

In addition, the harness manufacturers of automotive electric tools are no longer only engaged in the later design and manufacture of harnesses, and it has become an inevitable trend to develop together with the main engine manufacturers in the initial development. Based on the author's many years' experience in wire harness design and manufacture, this paper discusses the general design process and principle of electric tool wire harness.

Automobile circuit design? Power distribution design? The correct design of automobile power system is directly related to the normal operation of automobile electronic components and even the whole automobile. Therefore, the starting point of designing automotive wiring harness in the world is basically sex, and the electrical system of automobiles consists of three main parts.

Battery direct power supply system (commonly known as conventional power supply or 30 way power supply), the load connected to this part of power supply is usually a part or important part of the car. The main purpose is to control as few components as possible when supplying power to these components, so as to ensure that they can work normally in a short time even if they cannot start the car. On site maintenance, etc. Please pay attention to Liushi to learn more about automobile electric tools harness.