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Lithium battery testing equipment is used in the performance testing and evaluation of lithium battery research and development, production and engineering applications. It mainly includes the testing and evaluation of lithium battery consistency, functionality, safety and reliability. It is in the production of lithium batteries. Core equipment. Errors in the mass production of lithium-ion batteries directly affect the quality of the entire batch of products, and in severe cases, they may even cause the entire batch of products to be scrapped. Therefore, real-time detection in the lithium battery production process is very important. Lithium batteries are prone to burn or explode due to short circuit, overcharge and other reasons, which are dangerous. Therefore, lithium batteries need multiple protection mechanisms, such as the use of protection circuits to prevent lithium batteries from overcharging, overdischarging, overloading, and overheating. The development of lithium battery technology focuses on controlling costs, increasing the energy density of lithium batteries, enhancing use safety, extending service life, and improving group consistency. The combination of lithium batteries and the information industry is also more mature.
The prosperity of the new energy vehicle market has promoted the acceleration of the production capacity expansion of power battery companies. In order to increase market share, companies have continued to develop new products and improve process quality, thus pushing the domestic lithium battery equipment industry into a golden period of development. Lithium battery manufacturers and equipment manufacturers will cooperate more closely to upgrade technology and develop new processes to enhance market competitiveness. The new production capacity and the renewal and transformation of existing production capacity have promoted the vigorous development of the lithium battery equipment industry.
The demand for lithium battery quality and production capacity makes large-scale and automated manufacturing an inevitable choice for battery manufacturers. Relying solely on stand-alone equipment cannot fully meet the needs of customers to improve quality and efficiency. It is a trend for lithium battery equipment manufacturers to provide segmented/whole-line integration solutions, and integration capabilities Strong back-end equipment companies can provide customized solutions of “chemical components + warehousing logistics + modular PACK”. The back-end production line mainly integrates chemical composition, capacity distribution, logistics and warehousing, fire safety, and production line information management systems. Specifically, it is subdivided by energy-saving, safe, high-efficiency, and flexible production. In addition to having core equipment technical strength, system integrators must also master the customer’s core process management and control process, strong data analysis and processing capabilities, and have a deep understanding of the front-end and back-end industrial chain and automated stand-alone enterprises.
Lithium battery testing equipment is an important equipment in the post-processing stage of the lithium battery production process, covering multiple disciplines such as machinery, electronics, information, software, data management, and automatic control. The “Industrial Structure Adjustment Guidance Catalogue (2019)” promulgated by the National Development and Reform Commission lists “lithium-ion battery automation and intelligent production of complete sets of manufacturing equipment” as an encouraged industry. The development trend of the domestic lithium battery testing equipment industry will be reflected in the following aspects :
The rapid growth of the lithium battery market and the increase in labor costs have enabled lithium battery manufacturers to improve production efficiency and reduce production costs through product standardization, production automation and intelligence.
The combination of big data and cloud platforms will play a more important role in the service and upgrade of lithium battery equipment manufacturers. The equipment is remotely connected to the cloud platform system, which can monitor, record, diagnose and alarm in real time, and perform remote maintenance and upgrade of the equipment through OTA. Through big data analysis, in-depth mining of the law of performance changes during the use of lithium battery equipment, in order to continuously optimize the performance of the equipment.
Lithium battery equipment manufacturers have moved from stand-alone sales to segmented integration, and then to full-line integration, and finally developed into automated full-line integration, which makes it easier to expand customers and is more trustworthy in terms of product consistency, equipment performance, and safety. The overall line layout is the development trend of the lithium battery equipment industry, and powerful companies are accelerating the overall line capacity.
In order to improve the cycle life, stability, self-discharge, safety and other electrochemical properties of the battery, the consistency of the lithium battery must be strictly controlled or the battery level must be accurately evaluated. Therefore, the measurement accuracy of the current and voltage of the chemical conversion and capacity separation equipment has Very high requirements. In terms of long-term testing and prediction of performance trends, low-precision battery testing equipment will cause large test deviations, and some important change trends and electrochemical indicators may be ignored. Therefore, continuously improving the control accuracy and detection accuracy of charging and discharging is an inevitable requirement for the development of the subsequent production line, and it is also a sign of the level of equipment.
When the traditional lithium battery charging and discharging equipment charges and discharges the battery, the electric energy in the discharge process is all consumed in the way of resistance discharge or electronic load discharge, which causes energy waste. New energy-saving and energy feedback equipment came into being to release the battery when the battery is discharged. The electric energy is fed back to the grid.
The application of high-performance, high-power power electronic devices in equipment will become more common, and the third-generation semiconductor power devices represented by silicon carbide (SiC) are becoming more and more widely used in industrial fields. SiC devices have extremely high withstand voltage levels and energy density, which can effectively reduce energy conversion losses and the volume and weight of the device.
There are a large number of lithium battery testing equipment companies in China, and the scale of the companies is generally small, and the products are relatively single. In the context of the country’s strong support for new energy, some small and medium-sized enterprises have joined the production industry, and the quality of lithium battery equipment varies. With the continuous improvement of lithium battery performance requirements, the pressure of battery companies to reduce costs and increase efficiency has passed on the impact, and the competition among equipment companies has intensified. Some companies with weak R&D capabilities and cost control capabilities will be accelerated in the fierce market competition. The trend of agglomeration of orders to leading companies is more obvious. On the whole, after the industry adjustment in 2019 and the impact of the epidemic in the first half of 2020, the lithium battery equipment industry has once again ushered in a high growth stage. With the introduction of the “carbon peak” and “carbon neutral” goals, In the future, the development of the new energy vehicle industry will accelerate and there will be huge room for medium and long-term growth. The mainstream lithium battery companies have a clear intention to expand production, and the expansion of leading companies continues to accelerate, which will further drive the investment demand for lithium battery equipment. At the same time, as the penetration rate of new energy vehicles increases and the energy storage market matures, testing equipment will play a more important role in application scenarios such as the testing of new energy vehicle power battery systems, the echelon utilization and recycling of retired batteries.
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