WHAT IS THE OPTIMAL AMBIENT TEMPERATURE?

SOME FACTS ON THE SUBJECT OF AMBIENT OR OPERATING TEMPERATURE.

As a general rule, Banner recommends an operating temperature of max. -40 to +55 degrees Celsius; optimum storage conditions are approx. +25 to +27 degrees Celsius. These criteria apply to all lead-acid batteries and are valid for conventional, EFB, AGM and GEL technology.

Thermometer

Please be sure to observe the following instructions.

 

Since the battery is subject to the laws of chemistry and physics, the temperature of the battery has a significant influence on its characteristics. The higher the temperature, the faster chemical processes such as self-discharge take place in the battery, with massive repercussions for its service life.

 

Heat effect For this reason, the ambient temperature must not exceed +55 degrees Celsius. A value of +85 degrees Celsius is not uncommon in the engine compartment, especially in summer, but is considered uncritical for a maximum of 3 hours per day. 

 

Temperature-controlled charging characteristics are used, for example, to improve the temperature behaviour of batteries in the vehicle.

Effect of cold An acid density (at +27 degrees Celsius) of 1.28 kg/l (= open-circuit voltage of conventional battery ≥ approx. 12.7 V; AGM battery ≥ approx. 12.9 V) also means an optimal starting position in terms of the freezing point.

A fully charged battery (100% state of charge) only freezes at approx. -60 degrees Celsius.

 

However, care must be taken with discharged batteries. If there is any water in the discharged battery, the freezing point rises to almost 0 degrees Celsius. Discharged batteries can therefore freeze and, in extreme cases, even burst. The lower limit temperature of -40 degrees Celsius must be considered in terms of the chargeability, the state of charge and, as a result, the individual freezing limit of the battery.

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