LR44 battery

What is the impact of the design and manufacturing process of LR44 battery?

In terms of ingredients, attention should be paid to the amount of positive and negative materials added. Generally speaking, the design and assembly process generally requires that the negative electrode capacity is relatively excessive relative to the positive electrode. If it is not excessive, the negative electrode will precipitate lithium during the charging process, forming lithium dendrites, which will affect safety. If the negative electrode is too excessive relative to the positive electrode, the positive electrode may be over-de-lithiumized, causing structural collapse.

The electrolyte is also a very important factor in the impact of the reversible capacity of the battery. The process of electrode material de- and intercalation of lithium ions is always a process of mutual use with the electrolyte. This mutual use has an important influence on the interface condition and internal structure of the electrode material. The electrolyte will be consumed in the process of mutual use with the positive and negative electrode materials. In addition, part of the electrolyte will be consumed during the formation of the battery to form the SEI film and pre-charge. Therefore, the type and amount of electrolyte also affect the battery life.

The manufacturing process of lithium-ion batteries mainly includes: positive and negative electrode ingredients, coating, film making, winding, shelling, injection, sealing, formation, etc. In the battery production process, each step of the process is very strict. Any process that is not well controlled may affect the battery cycle performance.

In the process of positive and negative electrode batching, attention should be paid to the amount of binder added, stirring speed, slurry concentration, temperature and humidity, and ensure that the materials can be evenly dispersed.

In the coating process, under the premise of ensuring the high specific energy of the battery, the positive (negative) electrode coating amount is reasonably controlled, and appropriately reducing the electrode thickness is conducive to reducing the battery attenuation rate. The coated pole piece is further compacted by a roller press. The appropriate positive electrode compaction density can increase the discharge capacity of the battery, reduce the internal resistance, reduce polarization loss, and extend the cycle life of the battery.

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