Relationship between internal resistance and capacity of storage battery

There are many factors affecting the capacity of lead-acid batteries: discharge rate, temperature, termination voltage, plate geometry, electrolyte concentration, etc.

Internal resistance of battery: ohmic resistance and polarization internal resistance

Ohmic resistance: resistance of electrode material, electrolyte and separator.

Polarization internal resistance: internal resistance caused by positive and negative chemical reactions

The two do not directly affect each other, but affect each other by influencing other aspects. In other words, they do not have a direct relationship, but affect each other through the constraints that affect each other. For example, changes in temperature can affect the electrolyte and resistance of the battery.

1. The electrolyte temperature increases, the diffusion rate increases, the resistance decreases, and the electromotive force increases. Therefore, the battery capacity and the utilization rate of active substances increase with the increase of temperature.

2. The electrolyte temperature decreases greatly, the viscosity increases, the ion movement is blocked, the diffusion ability decreases, the resistance increases, and the resistance of the electrochemical reaction increases, resulting in the decrease of the battery capacity.


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