MORE POSSIBLE CREATION TEMPLATES FOR LEAD-ACID BATTERIES
Gel batteries are lead-acid batteries that add a gelling agent to sulfuric acid to make the sulfuric acid electro-hydraulic into a colloidal state. The difference from conventional lead-acid batteries is not only that the electro-hydraulic is changed to gel. For example, non-solidified hydrocolloids belong to colloid batteries from the perspective of electrochemical classification structure and characteristics. Another example is the adhesion of polymer materials in the grid, commonly known as ceramic grids, which can also be regarded as the application characteristics of colloidal batteries. Recently, a laboratory has added a targeted coupling agent to the plate formula, which greatly improves the reaction utilization rate of the active material of the plate. According to non-public information, it can reach a weight-specific energy level of 70wh.
The interior of the colloidal battery is mainly SiO2 porous network structure, and there are a large number of tiny gaps, which can make the oxygen generated by the positive electrode of the battery migrate smoothly to the negative electrode plate, which is convenient for the negative electrode to absorb and combine; The reaction process is not much different.
There are two types of valve-regulated sealed lead-acid batteries: one is a valve-regulated sealed lead-acid battery using an ultra-fine glass fiber diaphragm (AGM); the other is a valve-regulated sealed lead-acid battery using a colloidal electrolyte (GFL). Battery (abbreviated as GFL-VRLA battery). They all use the principle of cathode absorption to seal the battery. Therefore, there must be about 10% of the diaphragm gap in the diaphragm of the AGM-VRLA battery. For the GFL-VRLA battery, after the injected silica sol becomes a gel, the skeleton will further shrink, and the viscosity of the silica sol should be controlled at 10mPa .s or so so that the gel cracks through between the positive and negative plates. The voids or cracks provide a channel for the oxygen evolved from the positive plate to reach the negative electrode. In the production of AGM-VRLA batteries, too much electrolyte perfusion is not conducive to the recombination of oxygen at the cathode, and too little electrolyte perfusion will cause the internal resistance of AGM-VRLA batteries to increase; in the production of GFL-VRLA batteries, if If the viscosity of the silica sol is too high, that is, the amount of silicon solution added is too large, which will cause excessive cracks in the gel and increase the internal resistance of the GFL-VRLA battery. On the contrary, it is not conducive to the recombination of oxygen at the cathode. Therefore, valve-regulated sealed lead-acid batteries have very strict production process requirements.