How is a single battery?

　　Author ：Iflowpower – Portable Power Station Supplier

The processing of the monomer battery, the processing of the monomer electrode, mixing the electrode active material, the binder, solvent, etc., fully stirred and dispersed, forming a slurry. Apply: Apply the prepared slurry to the designated thickness to the collector (aluminum foil or copper foil, etc.

). Baked: high temperature baking drying treatment. The mixing is contacted, and it is for better ways to fix the mixed slurry on the aluminum foil or copper foil, and the drying process is a high energy consumption process, and if it can improve the link, it can reduce the positive and negative of the lithium battery.

Extreme processing cost. The homogenate of the lithium battery is a key link of lithium battery processing. It is important to mix ingredients such as active substances, binders, and conductive agents into uniform suspensions, usually we first disperse the binder into gel.

, Then some crafts will first disperse the conductive agent with the collant into conductive glue, then mixed with the active material. Some craftsmanship will mix the conductive agents and binders with the collaborators, the key to the homogenous mortar is how to disperse the various components in the slurry, and optimize the homogenation process in order to achieve this goal. The homogenous process is important into dry homogenous and wet homogenous, and the current weight-based equipment manufacturers have also begun to use high-speed cutting purposes with high-speed cutting purposes.

In addition, many materials manufacturers have developed a lot of additives for improving slurry dispersions. In the second step, after the processing of the unitary battery is completed the above-described electrode drying process, we entered the processing of the next link of the lithium battery processing. Pressure: The roller pressure is a rolling pressure that has been applied to make it compacted, which is more preferably attached to the aluminum foil or copper foil.

Cut: Separation is to cut into strips on the rolled poles. In order to prevent the dried electrode from absorbing moisture, the entire monomer battery processing link is carried out in a dry interval. The processing process of square dynamic lithium battery cells has three major categories.

One is a winding process. This process is generally applied to the process of cylindrical battery, and is currently used in the processing technology of square storage batteries. The advantage is that the processing efficiency is high, and the continuous processing can be achieved.

The disadvantage is also clear. Since the bending angle is relatively large, it is easy to generate electrode breakage, defects, especially in the case of thick electrodes, this problem will change More serious; the second is a laminated process, a laminated process is a relatively ideal process, and the positive and negative pole sheet will first punch, obtain a pole piece of a particular shape, and then select the positive or negative electrode plate diaphragm. The package is protected, and then manually or laminated machine is laminated.

This process does not cause a pole-shaped change, and a thicker electrode can be used, but since the laminated process is a non-sustained process, it is stacked The processing efficiency of the sheet is relatively low, and the manufacturer of this process is relatively small; the third is the Z-type laminated process. This process uses a persistent diaphragm, and the positive and negative pole plates that will be punched in the middle of the diaphragm. Based on the advantages of retaining the lamination process, it also accelerated the processing process, improved processing efficiency, and there are currently more applications.

The battery core should first be welded, and the polar welding method is important to use the ultrasonic welding process, and the battery core processed by the winding process is unable to do very thick, so it usually will 2-4 battery cells are sold in parallel, and the battery structure of the laminated process is not limited, so a single electric wire welding pole ear is generally. The next step is to the shelling step. After the outer surface of the electrical core welded the extremely ears is wrapped in the protective film, it is loaded into the battery housing, and the positive and negative pole column of the lid on the cover of the battery case is applied.

Ultrasonic welding, riveting and other processes are connected together, then the upper cover and housing of the battery are welded together by laser welding. After the welding is completed, the leak detection is usually taken, and the battery that is unqualified in the leakage rate, the common leak detection method includes a method of direct pressure, multiplier and differential pressure, and good sealing is to ensure long-term lithium battery performance. The key to stabilizing and reliability, so the battery leakage is also an essential part of the square power lithium battery processing.

The battery of which leak-screening is then a very important hydrotoxic process. Since the electrolyte of the lithium battery is very sensitive to moisture, the liquid-liquid process must be carried out inside the drying, in order to improve the infiltration effect of the electrolyte, usually Vacuum liquid. The battery sufficiently infiltrated battery is then entered into a process, and it is important to activate the battery by activating the battery for small current to the battery.

In addition, due to the problem of processing gas during electrolyte decomposition, the gas that occurs can accumulate within the battery cell, causing the electrolyte infiltration inadequate, so the manufacturer is in order to discharge the gas in the process, Arrange the battery seal after chemical. The battery is also aged, so-called aging is to put the electric storage battery on hold at a certain temperature, the substance of the battery can result in the external voltage and internal resistance of the battery due to some side reactions in the lithium battery during the shelving. By monitoring the voltage, internal resistance and capacity of the battery pack, it is possible to remove the battery that is unqualified and unqualified from the self-discharge, to improve the consistency of the monomer battery, and the aging results are also subsequent battery packs.

Important reference for matching, in order to accelerate the aging of battery aging, improve processing efficiency, manufacturers usually aging at high temperatures (50-60 ¡ã C) to shorten battery aging time.