There are two types of commonly used valve-controlled batteries: one type is lean, that is, cathode absorption type thin glass fiber membrane battery; the other type is gel battery. The principle and structure of these two types of valve-regulated batteries are based on the original lead-acid battery
. Measures are taken to promote the recombination of oxygen circulation and inhibit the generation of hydrogen. Any generation of oxygen can be considered as a loss of water. If the water is consumed excessively, the battery will dry out and fail, and the internal resistance of the battery will increase and the capacity of the battery will be lost. The specific differences are as follows: '(1) The ultra-fine glass fiber diaphragm for lean-liquid valve-controlled batteries absorbs all the electrolyte in the diaphragm, the diaphragm is about 95% saturated, and the electrolyte density is about 1.30k9/1. There is no free electrolyte in the battery. The diaphragm and the pole plate adopt a tight assembly process, and the internal resistance is small and the force is even. In the structure, horizontal layout is generally adopted. When vertical layout is adopted, the height of the two ends of the same plate should be compressed to a minimum to avoid stratification or slow down the stratification process. (2) The colloidal valve-controlled battery is similar to the traditional flooded lead-acid battery. The monolithic trough-type electrode plate and the ordinary diaphragm plate are assembled in the battery tank, and then the colloidal electrolyte composed of dilute sulfuric acid and SiO, particles is injected. , The electrolyte density is 1.24k9/1. This electrolyte fills all the gaps in the separator, the pole plate and the battery tank and solidifies, thereby completely wrapping the positive and negative plates. Therefore, at the initial stage of use, the oxygen generated on the positive electrode does not diffuse into the negative electrode channel and cannot be reduced with the active material lead on the negative electrode, and can only be discharged from the space by the exhaust valve. After using for a period of time, the colloid begins to dry up and shrink to produce cracks. Oxygen can diffuse to the surface of the negative electrode through the cracks. The oxygen circulation is maintained, the exhaust valve is not often opened, and the battery becomes sealed. The colloidal electrolyte has good uniformity, so the plate is uniformly stressed and not easy to bend during the charge and discharge process. The flow of electrolyte at the top and bottom of the colloidal electrolyte battery used in the battery is prevented, thereby avoiding stratification.
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