Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The process of assembling lithium battery cells into groups is called PACK, which can be a single battery or a battery module connected in series and parallel. Under the current background of the new national standards, the demand for lithium batteries is increasing. Our company's lithium batteries are usually used in various models.

Objectively speaking, the lithium-ion battery pack production process is divided into three major sections, one is pole piece production, the other is cell production, and the third is battery assembly. In the lithium-ion battery production process, pole piece production is the foundation, battery core production is the core, and battery assembly is related to the quality of the finished lithium-ion battery. The specific steps of the lithium-ion battery production process include positive electrode slurrying, negative electrode slurrying, positive electrode sheets, negative electrode sheets, steel case assembly, liquid injection and testing, and packaging.

Every link in the lithium-ion battery production process must be strictly and carefully managed, so as to improve the safety performance of lithium-ion battery pack products.

PACK includes battery pack, bus bar, soft connection, protective board, outer packaging, output (including connector), highland barley paper, plastic bracket and other auxiliary materials to form PACK.

Features of PACK

①Battery pack PACK requires batteries to have a high degree of consistency (capacity, internal resistance, voltage, discharge curve, life).

②The cycle life of the battery pack PACK is lower than the cycle life of a single battery.

③Use under limited conditions (including charging and discharging current, charging method, temperature, etc.)

④ After the lithium battery pack PACK is formed, the battery voltage and capacity are greatly improved, and must be protected and monitored for charge equalization, temperature, voltage and overcurrent.

⑤The battery pack PACK must meet the voltage and capacity requirements required by the design.

In the PACK process, materials such as nickel sheets, copper-aluminum composite bus bars, copper bus bars, total positive and total negative bus bars, and aluminum bus bars will be used. Copper soft connections, aluminum soft connections, copper foil soft connections, etc. will also be used. The processing quality of busbars and soft connections needs to be evaluated from these aspects.

① Whether the material meets the requirements. If the busbar material does not meet the standards, the resistivity will increase. In particular, it is necessary to confirm whether it meets the ROHS related requirements.

② Whether the critical dimensions are processed in place. Excessive tolerances in critical dimensions may lead to insufficient safety distances between high-voltage components during the assembly process and cause serious safety hazards.

③The bonding force of the hard area of the soft connection and the stress absorption status of the soft area.

④ Check whether the overcurrent capacity of the actual processed soft connections and busbars meets the design standards, and whether there is any damage to the insulated thermoplastic sleeve .

Nxe has always attached great importance to product quality and strives to create "nuclear safety" level lithium batteries . In the future, Nxe will continue to use leading technologies, advanced products and solutions to promote the development of the company's lithium battery industry.