(1) Electrolyte density under different geographical and climatic strips. Whether the electrolyte density is high or low, it is necessary to make a specific analysis for the specific situation. Winter temperature is low, the viscosity of the electrolyte is large, it is not easy to penetrate the inside of the plate, the end voltage and capacity of the battery will decline, especially in the strong discharge performance is particularly significant. In the case of more discharge of the battery, the electrolyte is also at risk of freezing. Therefore, in winter or cold areas, a higher density electrolyte should be used. On the contrary, in summer or hot areas, a lower density electrolyte should be used to prevent early damage to the separator and plate. The electrolyte of the lead-acid battery is prepared by a certain proportion of pure sulfuric acid and distilled water with a relative density of 1.84. The relative density is generally within the range of 1.24~1.31. According to the use of the battery, the working environment temperature is different, you can choose different relative density of the electrolyte. EverExceed stationary lead batteries not only pursue light weight, but also value the service life, often choose low density electrolyte; Lead batteries for electric bicycles have certain requirements for quality, and often choose electrolyte with moderate density; Starting lead-acid batteries require both light weight and strong instantaneous discharge capacity, and often use high-density electrolytes.

(2) the liquid level height of the electrolyte. The electrolyte level of the battery should be 10 to 15 mm higher than the plate. If the liquid level is too low, the surface of the exposed part of the plate, can not participate in the chemical reaction, so that the battery capacity is reduced, while the exposed part is also easy to vulcanize and damage. If the liquid level is too high, the electrolyte is easy to splash out; It is deposited on the cover to form a path between the poles and self-discharge, and it is easy to corrode the poles and wiring clips. Therefore, distilled water should be added in time and electrolyte should not be added. Because the reason for the liquid level drop is caused by water evaporation and water electrolysis when charging, the arbitrary addition of dilute sulfuric acid causes the electrohydraulic density to rise, affecting the life of the plate. Only in the case of splashing or pouring out of the electroliquid is allowed to add the appropriate density of electrolyte at the end of the charge.

(3) electrolytic liquid phase density. When the battery is fully charged, the pair density of the liquid phase is 1.31, the relative density of 25% discharge is 1.27, and the relative density of 5% discharge is 1.23. The discharge degree of the battery can be judged according to the relative density of the liquid phase. When the relative density of the liquid phase is higher than that of sufficient electricity, every 0.01 drop in the relative density is equivalent to 6% discharge, that is, the relative density is reduced by 0.04, and the discharge is approximately 25%.