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Assessing Remaining Battery Life

Assessing Remaining Battery Life

Spectro Modular estimates the remaining useful life (RUL) of a starter battery by assessing capacity and CCA. Capacity embodies electrical storage and CCA represents cranking ability.


Starter batteries have two common end-of-life scenarios:

  • Capacity fade
    Gradual loss of energy storage goes unnoticed until the engine stops cranking. Auxiliary loads in modern cars hasten capacity fade.
  • Heat failure
    Corrosion raises the internal resistance that slows cranking. Sulfation caused by partial charge also increases resistance.

End of battery life in most cases is defined by capacity fade. A capacity check identifies batteries in the fringe area marked in amber in the image below. The Spectro CA-12 assesses capacity by electrochemical impedance spectroscopy (EIS).

Reserve-Capacity-web-2.jpg

How Batteries Age
A German luxury car makertested the capacity and CCA of 175 starter batteries, shown as stars on the left. The test confirms that capacity is the leading health indicator.A CCA measurement alone does not provide reliable data.
 

en of life test of starter batteries.png

End-of-life tstarter batteries

 

Battery Definition

 

 

  • Capacity
    Storage of electrical energy in RC (Reserve capacity) or Ah, capacity loss is shown as a rock buildup.
  • CCA
    Responsible for engine cranking,
    illustrated by free-flowing tap.
  • SoC
    Liquid level denotes state-of-charge.

capacity and cca.jpeg

Graphic illustration of capacity and CCA


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Jaap Phaff Jaap Phaff
Neem contact op met Jaap voor vragen of zakelijke kansen met betrekking tot kabelmeettechnieken. We zijn graag betrokken bij het ontwikkelen van nieuwe oplossingen en het op de markt brengen ervan. Contact form jaap.phaff@heynen.nl
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