Vehicle Propre solutions your questions. Since electrical vehicles carry a traction battery with a big power capability, has the 12 V battery for equipment change into ineffective?
Our reader’s query
After studying Soufyane’s article entitled ” Electrical vehicles: which gear consumes probably the most? “, certainly one of our readers reacted this fashion within the feedback: “ So, foolish query, is the 12 V battery ornamental? ».
Our reply
It’s extra notably this sentence that has created doubt: “ All this gear attracts its power from the traction battery “. Sure, it’s true in a sure approach, in a shortened approach.
Personally, the data that I had obtained a couple of years in the past from producers’ EV technicians was that it’s at all times the 12 V battery which provides the accent gear, this aspect inherited from the thermal fashions being maintained in cost by the lithium ion pack. A number of feedback following the article additionally go on this course.
And now the doubt units in. Not possible to deal with the topic with out contacting Soufyane, the writer of the article. That is additionally the power of Vehicle Propre, enriching one another with our private information and questioning ourselves when obligatory. Applied sciences evolve, it’s essential to know tips on how to combine these evolutions.
We each mentioned the topic at size, evaluating our sources. A really fascinating train that made us assume again to our personal experiences with thermal fashions. When a gasoline or diesel automobile is began, is it the 12 V battery that provides the customers or does the circulate come instantly from the alternator. And there, it grew to become apparent, it’s not so binary.
And on a thermal?
Let’s take a traditional 30-year-old thermal automobile with a reasonably discharged 12 V battery. By turning on the headlights with out switching on the ignition, we will see that they illuminate lower than common. Supplied there may be sufficient juice left and the alternator is operational, if the engine is began, the sunshine depth of the headlights will increase markedly. It may possibly even be stronger when accelerating. The function of the alternator seems apparent.
Automotive began, if the alternator is useless, does the 12 V gear nonetheless work? Sure more often than not, generally in degraded mode. The electrical home windows go up extra timidly, for instance. What if the 12 V battery could be very discharged and the alternator is in good situation? Similar, it really works.
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One other situation, is it potential to drive with a began petrol automobile when the 12 V battery is totally discharged or the alternator is out of order? Sure, in each instances, the ignition receives what it does with electrical energy, no less than with sure fashions. And this due to a fairly effective however fairly easy digital administration. It’s extra advanced with the present fashions.
When an electrical is began
Serious about what occurs on a thermal automobile has allowed us to make certain of two issues. To begin with, when the automobile is began, the availability of electrical energy to 12 V gear probably comes from the battery and/or the alternator, relying on the state of affairs. However, if the engine is reduce, there is just one supply left: the 12 V battery.
Second level: there are variations in conduct relying on the fashions. And for electrical vehicles? Wouldn’t there be an intermediate aspect enjoying a bit the identical function because the alternator when the engine is began? A converter for instance. The best way to know ? Ah however, sure, after all, I’m revolted to not have considered it sooner! Who higher than e-Garages to reply these questions?
Therefore a telephone name to our pals in Carquefou, close to Nantes. ” When the automobile is began, a converter provides the 12 V and recharges the accent battery. It’s he who powers the whole lot, and it’s utterly clear for the 12 V “, replied the EV restore professionals. Specifying : ” This working mode is similar for all EVs outfitted with a 12 V battery ».
What if the electrical automobile just isn’t began?
When an electrical automobile just isn’t began, it’s like on a thermal mannequin, ” it’s the 12 V battery that powers the whole lot “. And this, thanks to some computer systems which then shortly fall asleep. This operation serves what’s of the order of telemetry and makes it potential to speak remotely with the car.
Throughout this era, the 12 V battery will be saved degree by drawing on the traction battery, nonetheless passing by the converter. Some electrical vehicles clearly point out this. Thus the Kia e-Soul, by a flashing blue gentle on the prime of the dashboard, when it’s not plugged right into a terminal or a socket.
However, when the ignition is on, however the car just isn’t began, Revolte seen 2 eventualities: ” On the Citroën C-Zero and Peugeot iOn, the 12 V battery alone provides the gear with the mandatory power. It’s completely different on the Renault Kangoo the place the converter is already energetic “. Thanks staff!
Do with out a 12 V lead battery
Might we do with out the 12 V battery? This lead aspect is most frequently similar to that of a thermal. When my Kia e-Soul died, the repairman steered that, given the space from the Kia dealership, I’m going to Renault subsequent door: “ It’s the identical battery mannequin as on their Mégane or their petrol Clio ».
Nevertheless, it’s not so easy, as a result of relying on the electrical automobile mannequin, even when the 12 V battery is similar, there may be usually a selected producer protocol to comply with when changing it.
Word that, in accordance with Revolte’s explanations, with a useless 12 V battery, it’s inconceivable to begin the Korean SUV. However by connecting a booster, it really works, and you’ll drive with out downside. You simply need to not reduce earlier than with the ability to remedy the issue. Producers have already thought-about adopting a 12 V lithium battery as an alternative of lead chemistry. So Tesla.
And do with out this aspect utterly? Similar, many have already thought of it. That is technically possible, however would require another, probably dearer than a 12V battery.
With this new Inexperienced Stamp part, Vehicle-propre journalists are there to reply your questions on electromobility. Selection of a car, want for technical data… Ship us your questions within the feedback beneath or by e mail at this tackle:
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