Why do lithium batteries require an IEC62133 test report?

Introduction Why do lithium batteries need IEC62133 test report? How to make a lithium battery? It is not obligatory to make an IEC62133 test report. Generally, foreign customers are concerned about the battery.

Why do lithium batteries require an IEC62133 test report?

It is not mandatory for lithium batteries to produce IEC62133 test reports. Generally, overseas customers require suppliers to provide them out of concern for battery safety. Additionally, lithium batteries use the IEC62133 standard for CB certification. Therefore, if you really need to make an IEC62133 report, you can simply go for CB certification.

DGM lithium battery report can identify multiple products

According to the classification of electrolytic materials, lithium ion batteries can be divided into liquid lithium ion batteries and lithium polymer. -ionic batteries. Due to the relatively high cost of lithium polymer batteries, their market share is relatively low. Liquid lithium batteries are widely used in the field of electric vehicles. In terms of electric vehicle applications, batterieslithium polymer are currently being commercialized. With technological advancements and the realization of large-scale production, the cost of lithium polymer batteries is expected to decrease rapidly and the penetration rate is expected to further increase.

Main listed companies in lithium battery industry: CATL (300750.SZ), Guoxuan Hi-Tech (002074.SZ), Yiwei Lithium Energy (300014.SZ) , Desai Battery (000049.SZ), Narada power supply (300068.SZ), etc.

Main data of this article:Battery thickness, weight, capacity, internal resistance, cycle time, permeability, etc.

Lithium-ion batteries can be divided into liquid lithium-ion batteries and polymer lithium-ion batteries

The electrolyte used in lithium-ion batteries is generally composed of organic solvents and salts of lithium dissolved in them. the solvents currently used are mainlyipally carbonate compounds (divided into two categories: PC-based and EC-based).

Lithium-ion batteries can be divided into liquid lithium-ion batteries and polymer lithium-ion batteries. Lithium-ion polymer batteries are developed from liquid lithium-ion batteries in addition to organic solvents and lithium salts. Polymer electrolytes also contain a pure solid/gel type polymer.

The difference between the two types of battery materials mainly lies in the electrolyte

Since the positive and negative electrode materials used in Liquid lithium ion batteries and Polymer lithium ion batteries are the same, the difference mainly lies in the electrolyte, the electrolyte of liquid lithium ion battery is liquid and the electrolyte of polymer lithium ion battery is a semi-solid colloid or a pure solid.

The difference in materialsaux of the electrolyte affects the material of the two shells, the choice of separators and current collectors. Compared with liquid lithium batteries, the outer packaging of lithium polymer batteries uses thinner aluminum film, which is thinner than steel and aluminum shells. However, when the thickness of the battery is the same, the material cost of lithium polymer batteries is the same. that of liquid lithium batteries. Close, but the cost of the process is much higher than the latter;

In lithium polymer batteries, the electrolyte plays the dual function of separator and electrolyte: 1) Separates the positive electrode and negative. materials as a separator, making the battery No self-discharge or short circuit occurs internally 2) The electrolyte plays the role of Lithium ions are conducted between the negative electrodes.

The occupancy rate of lithium polymer batteries is relativelyt low

The thickness of lithium polymer batteries can theoretically reach 0.5mm, which meets the requirement of mobile phones whose battery thickness is 4 mm and the following requirements: Compared with liquid lithium batteries, lithium polymer batteries are lighter under the same capacity and have higher capacity under the same size, the internal resistance of the polymer cell can reach less; greater than 35 mΩ, which significantly reduces the battery's self-consumption of electricity.

Compared to liquid lithium batteries, lithium polymer batteries have higher energy density, are more customizable, lighter and safer. However, due to their higher cost than liquid lithium batteries, the market share of lithium polymer batteries is relatively small.

The areas of application of these two types of batteriescontinue to expand

Liquid lithium-ion batteries are widely used in 3C electronic products, electric vehicles, industrial markets and other fields, relying on their cost-effective advantages, have been applied to notebook computers, camcorders, large-scale energy storage and other markets. As the performance of liquid lithium-ion batteries improves, their application areas are also constantly expanding, such as power tools, electric toys, telephones and household appliances.

Lithium polymer batteries have fine characteristics and can meet product needs. Lithium-ion polymer batteries are mainly used in mobile phones, Bluetooth headsets, laptops, etc. As its technology continues to mature and prices continue to fall, areas of applicationThe potentials of lithium-ion polymer batteries include electric vehicles, small radios and walkie-talkies, electric bicycles, military fields, etc.

According to data from Gaogong Lithium Battery, the penetration rate of lithium polymer batteries in the field of electric vehicles is low. In 2020, liquid lithium batteries (cylindrical and square batteries) accounted for 90.5% of shipments in the energy sector. vehicle field %. In terms of electric vehicle applications, lithium polymer batteries are being commercialized.

The penetration rate of lithium-ion polymer batteries is expected to further increase

At present, most lithium-ion polymer batteries are found in laboratory. pilot phase, and their costs are relatively high. It is still not comparable to liquid batteries, but with technological advances and theachieving large-scale production, its cost should decrease rapidly. Polymer solid electrolytes based on PEO or PEO-like membranes are expected to accelerate the commercialization process, thereby increasing the penetration rate of lithium-ion polymer batteries.

—— For more detailed research and analysis of this industry, please see the"Analysis Report of Demand Forecasting and Strategic Investment Planning of China Industry lithium batteries" from Qianzhan Industry Research Institute"

About a dozen products can be identified

Lithium batteries are a type of battery which uses lithium metal or lithium alloy as positive/negative electrode materials and uses non-aqueous electrolyte solutions As the application scope of lithium batteries gradually expands and the den.As the energy volume and capacity of a single battery become higher and higher, the safety of lithium batteries has attracted more and more attention.

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