Carry out aging test

Now all new energy concept products of new energy vehicles and new energy robots use new energy lithium batteries to form large-capacity lithium batteries. So what are the technical specifications of these lithium batteries? We understand the commonly used sizes of battery separators. 18650 is the founder of lithium batteries. In order to save costs, Sony Corporation of Japan introduced a standard lithium battery with a diameter of 18mm, a length of 65mm, and a length

Ordinary 18650 batteries are divided into lithium batteries and lithium iron phosphate batteries. The nominal voltage of the lithium battery is 3.7V, the charging cut-off voltage is 4.2V, the nominal voltage of the lithium iron phosphate battery is 3.2V, the charging cut-off voltage is 3.6V, the general capacity is 1200mah-3000mah, and the general capacity is 2200Mah-2600mah.

Lithium batteries understand what it is in the battery separator, so what is aging?

Aging is the process in which the product is loaded and operated under a certain temperature and/or load. After a period of time or a cycle, the functional goals of the product are met.

Lithium battery aging generally refers to the injection of liquid after the battery is first placed and assembled, which can be normal temperature aging or high temperature aging. Its purpose is to stabilize the performance and composition of the SEI film formed after initial charging. The room temperature aging temperature is 25 degrees, and the high temperature aging different plants, some 38 degrees or 45 degrees, the time is between 48 and 72 hours.

Aging and insulation seal aging:

Regarding the open aging of the battery, regarding the room temperature aging, if the relative humidity can be controlled below 2%, it is better to seal it after aging.

For high temperature aging, the sealing aging effect is better.

But it is certain that there are electrochemical dynamic changes during the aging process, which is of great help to the stability of SEI and can promote the stability of the electrochemical system.

The principle and purpose of the aging of the electrolyte of a lithium battery is to fully moisturize, and the other is that some active components of the cathode material must be inactivated by response, so that the battery as a whole function is safer, many companies in order to make the process faster, high temperature aging , But high temperature aging needs to pay attention to the control time and temperature. Because high temperature aging can produce living substances that exceed the normal temperatureDegree aging, the degradation control effect is good, the effective ingredients fully reflect the safety characteristics of the battery, the control is not good, the reaction is overreacted, so the electrical function is reduced , The capacity is reduced, the infrared is new, and there is even a possibility of leakage

After high temperature aging, the battery function is more stable. Most lithium battery manufacturers use high temperature aging operations in the production process. Aging at 45~50C for 1~3 days, and then at room temperature. Potential undesirable phenomena will be exposed after high temperature aging of the battery: voltage change, thickness change and internal resistance change are direct tests of battery safety and electrochemical performance.

High temperature aging In order to shorten the entire production cycle of the battery, only players enter the battery and only the battery that accelerates the chemical reaction at high temperature. The battery is not more than the benefits that may damage the battery. The best room temperature incubation time is more than three weeks, we are negative Yes, when the balance between the gap and the electrolyte encounters a chemical reaction, the battery is the truth.