Lithium-ion batteries are widely used in electric vehicles because of their high energy density, compact structure and light weight. There is no doubt that electric vehicles have brought great convenience to people's travel, but their fire accidents are still reported. The safety of lithium-ion batteries is like a "sword of Damocles" hanging over the head. How to find a balance between safety and high energy density has become a difficult problem that the whole industry chain of electric vehicles needs to face.

Byd, as one of the world's largest electric vehicle R&D manufacturers, is taking the lead in actively exploring innovative solutions. In order to continuously improve the comprehensive performance of the battery and solve the problems of range anxiety, safety anxiety and charging anxiety of electric vehicle users from the source, BYD plans to carry out comprehensive performance testing of lithium batteries.

As a national high-tech enterprise, Dianshi Instrument sets laboratory equipment research and development, design, manufacturing and service in one, in the field of materials, chemistry, engineering thermal physics, public safety and other fields for many years, for many well-known colleges, research institutions and enterprises (such as: University of Science and Technology of China, Institute of Engineering Thermophysics of Chinese Academy of Sciences, Guoxuan High-tech, etc.) provided the overall solution of the laboratory, and established a long-term stable cooperative relationship.

Instruments and equipment are the important material basis for experimental research, which is of crucial significance for the research to achieve great results. Byd urgently needs to match a professional and stable partner to continue to provide scientific research grade battery comprehensive performance test experimental equipment.

Recently, Dianshi Instrument and BYD have carried out strategic cooperation on the battery comprehensive performance test project. Dianshi Instrument with good customer reputation, strong technical strength, rich R & D and manufacturing experience, stood out from the fierce competition, won the high praise of BYD!

Project difficulty

Difficulties and challenges

"The devil is in the details." In order to ensure smooth cooperation, the heads of various departments of Point Stone instrument have made full preparations and strive to be accurate in every link. According to the person in charge of the technology Department, the technical team encountered three major difficulties in the promotion of the heat island (battery integrated experimental module) project.

"First of all, in terms of time, the customer needs are urgent, time is tight, and the task is urgent; Secondly, the battery integrated experiment room is a non-standard customized equipment, and there is no reference object on the market at present. In addition, the heat island (battery integrated experimental chamber) requires a variable environment, and multi-factor coupling needs to be achieved at the same time to simulate a complex experimental environment, and the technical requirements are very high.

Second, strength and confidence

"Those three things put together, it's challenging. But based on our years of experience in the field of comprehensive battery performance testing, the technical team finally produced a very detailed and stable technical solution."

"Confidence comes from strength, after several rounds of prudent technical evaluation, our team believes that this project is worth fighting for, and also attaches great importance to this cooperation opportunity, hoping to achieve innovation and breakthroughs, and repay BYD's trust and praise for Point Stone instrument."

【Blight spot technique】

Complexity and simplicity

The heat island (battery complex Laboratory module) achieves the ideal combination of complexity and simplicity, and its high degree of integration depends on the modular design concept.

1.the function is complex

Heat island (battery integrated experiment room) can realize multiple functions such as composite environment simulation (high temperature, high pressure, low temperature, low pressure), laser ignition, temperature test, observation record, data (pressure, temperature, gas type, gas content) collection and analysis, active protection and so on.
2. Simple design
The heat island (battery integrated experimental module) adopts the modular design concept and is composed of six major systems, namely: load-bearing shell, low-pressure vacuum system, environmental simulation system, cavity system, data acquisition system and intelligent operating system. The layout of each module is reasonable and the operation is orderly.

Second, security and flexibility

1. Safe operation

The heat island (battery comprehensive experiment room) is equipped with five protective devices, which are: explosion-proof device, emergency stop device, automatic pressure relief device, temperature protection device of the experiment room, overload and overcurrent protection device, which escort the safety of experimental personnel and equipment.

2.Flexible operation

The heat island (battery comprehensive experiment room) is small and delicate as a whole, and the bottom is installed with universal wheels, which can be flexibly moved at any time and anywhere according to needs; The combustion chamber can be removed for easy cleaning and maintenance.

Customer feedback

According to the feedback of BYD representatives, Dianshi Instrument is very "professional, dedicated and stable" in this cooperation. "Byd has always followed the development route of independent research and development, independent production and independent brand, and has always adhered to the development concept of" technology is king, innovation is based ". Strong independent innovation ability is the most important hard indicator when we select partners, and good reputation is also indispensable.
According to the comprehensive investigation and evaluation, Dianshi instrument is a "little giant" in the field of non-standard customized scientific research instruments and equipment, with rich experience and deep technical accumulation, in line with "specialized, refined, special, new" and other characteristics. From sales to research and development, the engineers of Point Stone Instrument are very professional, not only outstanding business ability but also very dedicated, no matter when and where they can always help us solve problems in a timely manner, sincere, stable and trustworthy."
Reaching strategic cooperation with BYD is a brush in the development process of Dianshi instrument, which is of great significance to carry on the past and future, and inject infinite vitality into a new round of technology upgrading and value chain upgrading of Dianshi instrument. It marks a key step of sincere cooperation and mutual benefit between the two sides, highlighting and expanding the competitive advantage of Dianshi Instrument in the industry.
With its core strength and comparative advantages, Dianshi Instrument successfully passed the strict review and has been successfully selected into BYD supplier library. Looking ahead, the two sides are expected to further broaden the areas of cooperation and deepen the concept of coordinated development. Adhering to the concept of "focus, ideal, effective", Dianshi Instrument will continue to help the national scientific and technological level progress!