[Solved] Charging Ca/Ca Batteries: Car Alternators, Optimal Voltage (16.2-16.8V), & Effect on Electronics

As the batteries made in Ca / Ca calcium technology. They require increased voltage during the final phase of charging. Up to 16V. It is usually 16.2-16.8V. Otherwise, the battery being charged will not reach the correct electrolyte density. And now the question: How is the Ca / Ca battery charged by a car alternator? It is known that the voltage in the vehicle does not exceed 14-14.8V. So generally it appears that such a battery does not have the correct electrolyte density. And rather there is no question of a long life of such a battery. Is this not a deliberate act? Most batteries are unable to look into the cell. And measure the electrolyte density. Ba, even in most modern cars. There is no question of disconnecting the battery during charging. Will the voltage of 16.2-16.8V damage the installation and electronic components?

murgrabia wrote:

And rather there is no question of a long life of such a battery

Why? In an old Audi 80 I had a Ca / Ca battery and lasted exactly 5 years despite being not very careful.

murgrabia wrote:

Is this not a deliberate act?

No. This is a compromise between battery life and the complexity of a charging system. To be able to charge a battery up to 16 V, the charge regulator would need to closely monitor the battery status and reduce the voltage to a safe level in time, otherwise the battery would be damaged quickly. Why complicate the charging system too much if the profits will be rather disproportionate in relation to costs and disadvantages?

murgrabia wrote:

Most batteries are unable to look into the cell. And measure the electrolyte density. Ba, even in most modern cars.

Well, because most of the currently produced batteries do not require topping up, so the manufacturer does not anticipate the need for access to the cell.

murgrabia wrote:

There is no question of disconnecting the battery during charging.

In any vehicle more advanced than the c 330 there is no question of disconnecting the battery while the engine is running - it may damage the electronic components in the vehicle's equipment.

murgrabia wrote:

Will the voltage of 16.2-16.8V damage the installation and electronic components?

A short-term voltage spike is unlikely to hurt, but is long-term voltage of this value safe - I would have doubts.

I recommend using the search engine ...

So much for the topic: http://www.akubiz.biz/
https://www.youtube.com/channel/UCbSVXP31l7_8DMoTg8h23vw

Tests made for ordinary Kowalski.
How the battery is built.