Battery capacity.dual purpose marine battery

　　capacity

　　The capacity unit of a battery is coulomb (C) or ampere hour (Ah). There are three specialized terms for characterizing the capacity characteristics of batteries:

　　a. Theoretical capacity. It refers to the amount of electricity calculated based on the electrochemical equivalent number of active substances participating in electrochemical reactions. Generally, in theory, 1 electrochemical equivalent substance will emit 1 Faraday electricity, that is, 96500C or 26.8Ah (the amount of 1 electrochemical equivalent substance is equal to the Atomic mass or molecular weight of the active substance divided by the number of electrons in the reaction).

　　b. Nameplate capacity. It refers to the minimum amount of electricity that a battery should discharge under specified discharge conditions, as specified or guaranteed during the design and production of batteries.

　　c. Actual capacity. It refers to the amount of electricity that a battery can release before terminating its voltage under certain discharge conditions, namely at a certain discharge current and temperature.

　　The actual capacity of the battery is usually 10%~20% larger than the Nameplate capacity.

　　The size of battery capacity is related to the quantity and activity of active substances on the positive and negative electrodes, as well as to the structure and manufacturing process of the battery and the discharge conditions (current, temperature) of the battery.

　　The comprehensive indicator that affects battery capacity is the utilization rate of active substances. In other words, the more fully active substances are utilized, the higher the capacity provided by the battery.

　　The utilization rate of active substances can be defined as:

　　Utilization rate=(actual battery capacity/theoretical battery capacity) × 100%

　　Alternatively, utilization rate=(theoretical dosage of active substance/actual dosage of active substance) × 100%.

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