Cold-cranking amperes

FIGURE 23.23 Correction factor for calculating cold-cranking Ampere (CCA) rating. 

Cold crank performance, battery life expectancy, and freedom from maintenance are generally co-affected by the separators, whereas ampere-hour capacity remains largely unaffected at a given separator thickness. The properties of the different leaf and pocket separators are compared in Table 10. These typical separator properties (lines 1-4) are reflected in the electrical results of battery tests (lines 5-8). The data presented here are based on the 12 V starter battery standard DIN 43 539-02 tests based on other standards lead to similar results. 

For an automobile battery, invest ate what is meant by the following terms ampere-hotir rath cold-cranking rating, and reserve capacity rating. Write a brief report discussing your finding. 

Starter batteries should not be deep discharged they are designed for shallow discharges only. The lead is applied on thin plates in a sponge-like form that has the appearance of fine foam. This extends the surface area of the plates to achieve low resistance and maximum power, but this fragile structure is not suitable for deep discharges. Starter batteries are marked with CCA and ampere hour (Ah) or reserve capacity (RC). CCA refers to cold cranking amps, a measurement that represents the amount of current a battery can deliver at cold temperatures. (CCA and internal resistance are related.)... 

Capacity test in minutes at 75 amperes to 5.25 volts at SOT (27°C) cold cranking performance test not normally required for this battery. 

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