Because there are not many low-temperature cold areas in the country, 18650 pack builder there are not many low-temperature battery manufacturers, but foreign countries such as Russia, the United States, Canada and other Nordic countries, the demand for low-temperature lithium-ion batteries is greater. So what is a low-temperature lithium-ion battery? Here's how:

Low-temperature lithium-ion batteries are mainly low-temperature lithium polymer, battery manufacturing machine low-temperature 18650 lithium-ion batteries and low-temperature lithium iron phosphate batteries, each has advantages and disadvantages.

low temperature polymer lithium battery

The low-temperature polymer lithium battery should be one of the best in low-temperature performance, li ion battery construction especially in the management of smart wearable technology equipment, which is a better advantage with China.

Low temperature polymer lithium battery

Low temperature performance characteristics:

At present, the low-temperature polymer lithium-ion battery of the claw battery can reach the temperature range of the following stages:

In the temperature range of -50℃ to 50℃, the effective discharge capacity can reach more than 75% at 0.2C rate. Effective cycle life is 150 to 200 cycles.

In the temperature range of -40 to 60 °C, the effective discharge capacity of 0.2 °C is greater than 85%, and the effective discharge capacity of 0.5 °C is greater than 75%

In the temperature range of -30℃ to 65℃, the discharge rate is 0.2C, the effective discharge capacity is more than 90%, the discharge rate can reach 2C, and the discharge capacity is more than 75%. Effective cycle life of more than 300 times.

In the temperature control range between -20℃ and 75℃, 0.2C rate discharge effectively improves the discharge environmental capacity by more than 95%, can really achieve 5C discharge, and effectively utilizes discharge data capacity by more than 65%; Effective development of circulation system service life of more than 300 times.

Due to the complexity and non-uniformity of the use environment, the above basic data will be biased by specific usage.

The advantages of adapting to the equipment space requirements.

At present, low-temperature polymer lithium batteries mainly use colloidal or solid-state lithium batteries, and the production process is lamination. Therefore, low-temperature polymer lithium batteries can be more flexible in the design and manufacture of battery capacity and shape, which can be basically customized. Especially in terms of small ultra-thin batteries, it has more advantages. At present, this use of more portable electronic devices or smart wearable devices, especially in extreme cold adventure equipment, is the current battery of choice.

In terms of product weight, calculated by colloidal or solid electrolyte, low-temperature lithium polymer batteries are basically the same as low-temperature lithium iron phosphate batteries, and under the same voltage and capacity, they are lighter than low-temperature 18,650 lithium-ion batteries.

In terms of the cost of production technology manufacturing enterprises, it is the highest cost management of these three low-temperature batteries, which is one of the main factors that limit its application.

Low temperature 18650 lithium battery

At present, the market for low-temperature 18650 lithium batteries is mainly liquid electrolyte. The shape and size of the steel shell cylindrical battery is fixed, that is to say, its shape and size are fixed, so the current maximum capacity of the battery is 3300mAh, which is the capacity that the more powerful lithium battery manufacturers can achieve, generally around 2800mAh.

18650 Low temperature battery

18650 Low temperature battery Features:

At present, the temperature of several stages that can be achieved by low-temperature 18650 lithium-ion batteries is as follows:

Within the temperature control range between -40℃ and 60℃, 0.2C rate discharge, effectively improve the discharge environmental capacity is 40% to 55%, and effectively develop the circulation system network life of more than 180 times;

In the temperature range of -30 to 65 °C, the discharge capacity is 65% and 60%, respectively, and the effective cycle life reaches more than 200 times.

In the temperature range of -20℃ to 75℃, the discharge rate is 0.2C, the effective discharge capacity is more than 80%, and the effective cycle life is more than 300 times.

In terms of application, due to the fixed performance and size of the battery, the use range is small, but its production cost is lower than that of low-temperature polymer lithium batteries and low-temperature lithium iron phosphate batteries.

low temperature lithium iron phosphate battery

Low-temperature lithium iron phosphate batteries have two forms of outsourcing, one is steel shell, which is mostly used in the field of new energy batteries, such as energy storage batteries, new energy vehicle batteries, etc.; One is a flexible packaging lithium iron phosphate battery with aluminum-plastic film as the outer packaging. The performance of this battery is basically the same as that of lithium polymer, but it is better than 18650 lithium-ion batteries at low temperatures and worse than lithium polymer. Because the development time of lithium iron phosphate battery technology is not long, the technology maturity and stability are worse than the other two kinds of batteries, and the equipment requirements are relatively high in the manufacturing process, so there are not many manufacturers of lithium iron phosphate batteries with better quality in China.

Low temperature lithium iron phosphate battery

The above is a simple analysis of several different ways of low-temperature lithium batteries, and I hope it will help you develop.