Turnkey full systems integration electronic manufacturing box build pcba assembly technology of battery pack for new energy electric vehicles

 
Abstract: battery system plays an important role in new energy vehicles. With the increasing market demand of new energy vehicles, more and more attention has been paid to the research and development and assembly production technology of battery pack. The battery packaging wiring is mostly arranged in a separate workshop, which is divided into different production areas according to the function. According to the requirements of the product assembly process, the battery packaging wiring is equipped with assembly, charging, testing, transportation and other equipment to complete the assembly task of the qualified battery pack.

 
Key words: new energy vehicle; battery pack;pcba box build assembly.
 

Introduction.
 
China's new energy vehicle industry is developing rapidly. The core technology of new energy vehicles is mainly battery pack, and its production and assembly quality directly affects the performance of new energy vehicles. At present, hammer ion battery is the mainstream of power battery in China, and iron phosphate cone battery is widely used, but the overall level lags behind that of the United States and Japan. Starting with the general situation of the power battery of the new energy vehicle, this paper discusses the structure of the battery pack and the technical knowledge of assembly and production. the article is posted by Dr. Lee Duang, Senior Vice President of Topscom Technology Automotive EMS Department,china Topscom provide one stop shop turnkey vehicles automotive electronic device pcba assembly contract electronic manufacturing services.
 
1 general situation and development direction of new energy vehicle battery in our country.
The power battery of new energy vehicle, according to whether it needs to be recharged or not, is divided into storage battery and fuel cell. Batteries are mainly used in pure electric vehicles, hybrid vehicles, plug-in hybrid vehicles, and fuel cells are mainly used in fuel cell vehicles. This paper mainly introduces the battery.
 
1.1 lead-acid battery.

The electrode material of lead-acid battery is lead and its oxide, and the electrolyte is sulfuric acid solution. Its advantages: stable voltage and low price. Its disadvantages: low specific energy, short service life and frequent daily maintenance. In China, lead-acid batteries have been widely used in the field of low-speed electric vehicles.

1.2 Silver hydrogen battery.

The anode material of hydrogen battery is brocade hydroxide and the cathode material is composed of multi-component alloy composed of pot, strong metal, silver and so on. its energy volume density is about 3 times that of lead-acid battery, and its specific power is about 10 times that of lead-acid battery. The disadvantages of baht hydrogen battery are as follows: the capacity of baht hydrogen battery decreases at low temperature and its charging tolerance is poor at high temperature; its raw materials such as metal brocade are very expensive; overdischarge.
 
The unified management software registers the basic information of each cylinder to realize the functions of cylinder query, information modification, filling inspection, data statistical management, summary printing and so on. Through computer management software, overdue cylinders and faulty cylinders can be screened automatically to put an end to filling with diseases. Before filling, if the computer detects a problem with the cylinder, the filling function of the filling controller is prohibited, so as to achieve the function of intelligent management of the cylinder.
 
4.4 Safety interlock function of chlorine leakage. Each filling port is equipped with a chlorine alarm, the leakage exceeds the alarm value, and the alarm signal is transmitted to the PLC.
P LC starts the acousto-optic alarm, stops the liquid chlorine liquid pump, cuts off the filling pneumatic valve, and records the alarm signal. the article is posted by Dr. Lee Duang, Senior Vice President of Topscom Technology Automotive EMS Department,china Topscom provide one stop shop turnkey vehicles automotive electronic device pcba assembly contract electronic manufacturing services.
 
Conclusion.
 
Through the comprehensive transformation, the liquid chlorine filling system realizes the interlock control of the quantitative filling of the cylinder and the liquid chlorine leakage alarm, realizes the computer information file management of the liquid chlorine cylinder, and records and checks the cylinder information automatically. The compressed space required by the system.
 
Electricity will cause permanent damage to the performance of the battery, and the state of charge is greatly limited. Brocade hydrogen battery is widely used in the field of remote control toys, and it is also used in the field of hybrid electric vehicles and pure electric vehicles.

1.3 "ion battery.

The new cone ion battery with high performance and low cost will be the successful direction of the power system development of new energy vehicles. The new cone ion power battery will use high voltage / high capacity cathode materials, high capacity anode materials and high voltage electrolyte to replace the existing lithium ion battery materials, and the battery cost, specific energy and energy density will have obvious advantages. it can greatly improve the economy and convenience of new energy vehicles.
In the future, we will focus on developing and manufacturing power batteries with high specific energy and high specific power. This work has been incorporated into the national key R & D plan in 2017. We will focus on the following issues: manufacturing consistency; safety and life after grouping; high-energy children and high-power compatibility; and screening of raw materials.
two。 Structure classification of common battery packs for new energy vehicles.

According to the different schemes of the power battery to provide power to the new energy vehicle, the size, weight and specification of the battery pack are also different. According to the models of new energy vehicles, the battery pack structure is roughly
divided into the following categories:

2.1 fuel-electric hybrid vehicle battery pack.

In view of the characteristics of the gas-electric hybrid vehicle, the battery pack is only equipped to assist the engine in the special stages of starting, acceleration, braking and so on, so the battery pack is relatively small and lightweight. At present, most of the fuel-electric hybrid vehicles on the market are hydrogen batteries, and the cooling system is relatively simple. Natural ventilation and cooling devices are often used for cooling, which is small in volume and light in weight. the article is posted by Dr. Lee Duang, Senior Vice President of Topscom Technology Automotive EMS Department,china Topscom provide one stop shop turnkey vehicles automotive electronic device pcba assembly contract electronic manufacturing services.
 
The air source pressure must be above 0.6 MPa to ensure that the pneumatic valve can operate normally and the valve closes reliably. In order to facilitate the inspection of the filling condition of the cylinder during the filling process, the filling function can be suspended according to the filling stop button in both the semi-automatic and automatic filling process.
Discussion: at present, the management of cylinders has not reached the full use of electronic tags, through the increasingly stringent requirements of the national management departments for the management of cylinders, all cylinders will use electronic tags in the future, we can achieve the tracking and management of the whole process of each cylinder, and completely put an end to illegal use.