Does the 18650 lithium battery manufacturer have capacity division at the factory?
Capacity treatment at the factory of 18650 lithium battery manufacturers is an important step to ensure battery performance and safety, which helps to improve product quality and brand reputation to meet the needs of different customers. Is there a detailed guide for 18650 lithium battery manufacturers to have capacity division when leaving the factory?
1、 Does the 18650 lithium battery manufacturer have capacity division at the factory?
Legitimate 18650 lithium battery manufacturers will perform capacity division treatment when leaving the factory, which is one of the core processes in lithium battery production. The specific process is as follows:
1. Capacity sorting: Each battery is tested using a charging and discharging device and graded according to its actual capacity (such as 2800mAh, 3000mAh, 3500mAh) to ensure that the capacity difference within the same batch is ≤ 1%, avoiding battery pack imbalance caused by mixing.
2. Internal resistance and voltage screening: Simultaneously detect internal resistance (usually ≤ 30m Ω) and open circuit voltage (3.6-3.8V), eliminate abnormal cells, and ensure consistency of charging and discharging after grouping.
3. Additional testing for high-end manufacturers
3.1 Cycle life verification: Sampling for over 500 charge and discharge tests, with capacity decay ≤ 20%;
3.2 High rate performance: Verify the temperature rise (<60 ℃) and stability during discharge above 10C;
3.3 Safety testing: Sampling inspection of safety items such as overcharging/overdischarging/needle punching/squeezing, in compliance with UN38.3 standards.
4. Attention to users: When purchasing, the manufacturer should be requested to provide a capacity distribution report (including a capacity distribution histogram), and priority should be given to selecting battery cells from Super Power Yang. Unrated disassembled batteries or B-grade battery cells should be avoided (which can easily cause overheating and loss of control).
2、 The reason for the factory capacity division of 18650 lithium batteries.
18650 lithium battery manufacturers usually perform capacity division treatment when leaving the factory, for the following reasons:
1. Ensure consistency in battery performance: 18650 lithium batteries may have differences in capacity, internal resistance, and other parameters even within the same batch of batteries during production. Through capacity division processing, battery combinations with similar performance can be selected to ensure consistency in battery pack performance, thereby extending the service life of the battery pack and improving its overall performance.
2. Improve the safety of battery packs: During the capacity division process, it is possible to detect batteries with quality problems or performance that do not meet standards, avoiding safety hazards such as overheating, overcharging, and overdischarging during use after these batteries enter the market, and ensuring the safety of users' lives and property.
3. Meet different customer needs: Different electronic devices have different performance requirements for batteries. Through capacity division, manufacturers can classify batteries according to parameters such as capacity and internal resistance to meet customers' needs for batteries of different performance levels, providing customers with more accurate product selection.
4. Enhance brand reputation: For battery manufacturers, strict capacity separation before leaving the factory is a way to control and ensure product quality. Only by providing high-quality and reliable products can we win the trust and reputation of customers, enhance the market competitiveness and credibility of the brand.
As an indispensable core component of various electronic devices, the performance and quality of lithium batteries are directly related to the competitiveness and user experience of products. 18650 lithium batteries have become a popular choice in the market due to their standardized size, high energy density, and wide range of applications. When it comes to 18650 lithium battery manufacturers, Chao Liyang is undoubtedly one of the best, and it has strict standards and processes for capacity division before leaving the factory.
3、 About 18650 lithium battery
1. Definition and Characteristics: 18650 actually refers to the external specifications of the battery, which is an early lithium battery model designed by Sony Corporation in Japan. Among them, 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery. This type of battery has the characteristics of high energy density, long lifespan, safety and reliability, and is widely used in various electronic devices.
2. Application areas: 18650 batteries are widely used in various fields such as consumer electronics, power tools, electric vehicles, energy storage systems, etc. due to their excellent performance and standardized size. Whether it's smartphones, laptops, electric vehicles, or solar energy storage systems, the presence of 18650 batteries can be seen.
4、 The Importance of 18650 Lithium Battery Manufacturers
1. Product quality assurance: High quality 18650 lithium battery manufacturers can ensure the stability and reliability of battery quality and performance. They ensure that every battery meets high quality requirements through strict raw material procurement, production process control, and product testing.
2. Technological innovation capability: Leading battery manufacturers usually have strong R&D teams and advanced production equipment, which can continuously introduce new battery products with higher energy density, longer lifespan, and safer performance. These innovative achievements not only improve the performance of batteries, but also promote the progress of the entire industry.
3. Customized services: Different application scenarios have different requirements for battery performance and specifications. Excellent 18650 lithium battery manufacturers can provide customized solutions according to customer needs, meeting the usage needs of various special scenarios.
