How are the lead-acid batteries used in semi electric mobile scissor lift platforms produced?

Lead-acid batteries used in semi-electric mobile scissor lift platforms are designed to provide reliable power for the lifting and maneuvering mechanisms. Their production involves several stages, which include the following:1. Raw Material Preparation
Lead: The primary material is refined lead, which is often obtained from recycled batteries or lead ore. The lead is smelted and purified to remove impurities.
Electrolyte:A sulfuric acid solution is prepared, which serves as the electrolyte for the battery.
Separator Material:These are usually porous membranes made of synthetic materials like polyethylene, which separate the positive and negative plates.
2. Plate Manufacturing
Grid Casting:Grids, which are frameworks that hold the active material, are cast from lead or lead alloys. The alloy may include antimony, calcium, or other additives to enhance mechanical strength and conductivity.
Paste Application:A mixture of lead oxide, water, sulfuric acid, and other additives is applied as a paste to the grids. This paste becomes the active material.
Drying and Curing:The pasted plates are dried and cured to achieve the proper chemical composition and mechanical properties.
3. Assembly
Plate Stacking:Positive and negative plates are stacked alternately with separators in between to prevent short circuits.
Cell Assembly:These plate stacks are placed in individual cells within a battery casing, usually made of durable polypropylene.
Interconnection:The cells are connected in series or parallel depending on the required voltage and capacity.
4. Filling and Formation
Electrolyte Filling:The cells are filled with sulfuric acid electrolyte at a controlled concentration.
Formation Charging:The battery undergoes an initial charging process to convert the active material into its final electrochemical state (e.g., converting lead dioxide in the positive plates and sponge lead in the negative plates).
5. Quality Testing
Batteries are subjected to rigorous testing to ensure they meet performance specifications. This includes:
- Voltage and capacity checks.
- Leak and pressure tests.
- Cycle life testing to simulate usage.
6. Final Assembly and Packaging
- The battery is sealed, labeled, and fitted with terminal connectors. Finally, it is packaged for shipping.
Special Features for Scissor Lifts
Lead-acid batteries used in semi-electric scissor lifts are often deep-cycle batteries, designed to provide consistent power over long periods and withstand repeated deep discharges. Some manufacturers also use sealed lead-acid (SLA) or gel-cell batteries, which are maintenance-free and more suitable for indoor use due to reduced risk of electrolyte spillage.
This process is generally carried out by specialized battery manufacturers following strict environmental and safety regulations, given the hazardous nature of lead and sulfuric acid.