What are the influencing factors of battery capacity?

When the amount of battery active substance is certain, the actual capacity is determined by its utilization rate. Factors that affect the utilization of active substances are:

1.Effects of discharge conditions

(1) Under the condition that the total number of active substances is unchanged, the battery capacity decreases with the increase of the discharge current. Therefore, when talking about battery capacity, the discharge rate must be specified.

(2) The capacity of the battery and the utilization rate of the active substances increase with the increase of temperature, mainly due to changes in the performance of the electrolyte. One is the reduction of the citation temperature, the increase of the viscosity of the electrolyte, the greater resistance to ion movement, the reduced ability to diffuse, and the lack of use of the active substance due to the lack of acid, resulting in a decrease in capacity. The second is the increase in the temperature of the electrolyte resistance due to the decrease in temperature. As a result, the internal resistance of the battery increases, the voltage drop increases, and the capacity decreases.

(3) The cut-off voltage at the termination of voltage discharge also has a slight influence on the calculation of discharge time. In order to prevent the battery from discharging but damaging the bonds, and for the comparison between different batteries, the termination voltage at various discharge rates and temperatures is clearly determined in the standard.

2.Impact of design parameters

(1) When the quality of the active substance is certain, the geometric area in direct contact with the electrolyte increases, and the thickness of the polar plate is reduced. The utilization rate of active substances will increase. Battery capacity will increase.

(2) The effect of electrolyte concentration on battery capacity In lead-acid batteries, sulfuric acid is also a reactant. When the volume is fixed, the concentration of the electrolyte is increased, that is, the reaction substance is increased, so within the range of electrolyte concentration in actual use. Increased electrolyte concentration and increased battery capacity.

(3) The design parameters of the grid change the ordinary rectangular grid to a radial shape, and the polar ear is changed to a large current discharge performance and low temperature start of the intermediate battery, and the charging acceptance ability can be significantly improved.

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