What’s the Difference between Start Stop Car Batteries & Normal Batteries?

Start Stop Car Batteries

With the increasing popularity of on-off batteries and the production of new low emission vehicles by more and more manufacturers, on-off batteries are rapidly becoming the norm. But what are start stop car batteries and why do they replace ‘normal’ car batteries?

What are start stop car batteries?

The start stop car batteries work by automatically turning off the engine when the vehicle is suspended to save fuel, for example, when the vehicle stops at a red traffic light.

Ordinary car batteries only provide current to the starter to make it display, while modern start stop car batteries can discharge and charge many times. This means that even if the engine is stopped and the battery is idle, the start stop car batteries still supplies power to the auxiliary systems (lights, air conditioning and music). There is also a braking regeneration system, which stores energy during braking so that it can be used repeatedly in the future.

There are two sorts of start stop car batteries- EFB and AGM

EFB battery1

EFB battery – enhanced cycle pad battery is designed to meet the needs of ordinary start and stop vehicles, so that it can benefit from performance improvement and extended battery life, so as to meet higher cycle requirements. EFB battery can reduce the carbon dioxide emissions by 6%, compared with “ordinary car battery”, EFB battery can also increase the efficiency of 6% in terms of fuel consumption. The EFB battery will affect the higher power load of the auxiliary system, even if the car has been suspended.

EFB battery needs to be replaced with another EFB battery or your other standby start stop car batteries. AGM car battery ordinary car battery cannot be used to exchange start stop car batteries.

AGM battery – absorbent glass mat automotive battery is for larger, more demanding start stop vehicles, with more complex built-in technology than standard entry-level vehicles. All this is to reduce fuel consumption. In general, the fuel efficiency of AGM battery is increased by 8%, and the carbon dioxide emission is reduced by 8%.

Similar to EFB batteries, AGM batteries must be replaced with similar batteries.

Why are start stop car batteries becoming popular?

Stop and start the use of batteries because they can reduce carbon dioxide emissions, and carbon dioxide emissions are tons of car, therefore, this car battery update is to make our car more environmentally friendly.

Which manufacturers are advocates of start stop car batteries?

Manufacturers such as Audi, BMW, Fiat and Volkswagen are promoting the use of this new start stop technology, and so far more than 15 million vehicles in Europe have been running on these systems.

Why do I need a special battery for the automatic start-stop system?

Every start-up process is related to the large amount of energy of the car battery. The battery must be in a very good condition to reliably provide high starting current. Especially for modern vehicles equipped with automatic start stop system, the engine will shut down many times during driving. During these phases, the battery continues to power all consumers. Traditional starter batteries are not designed for this charging output.

Only the battery with start stop technology can meet these requirements and withstand pressure.

The generator charges the starter battery while driving

In the car without automatic start stop system, the starting process is usually one time. In the process of driving, the generator supplies power to the entertainment system, navigation equipment and other electrical equipment, so that if the generator works, the starting battery will not discharge during driving.

The start stop car batteries have a double load

The situation of vehicles with start stop technology is different. In the process of crossing the town, the battery will go through a series of start and stop cycles. If the car is stationary at the traffic lights and the engine stops running, the power consumption devices such as electric lights, windshield wiper, radio or display still need power supply. The load is increased by continuous discharge and charging.

In particular, short trips pose a challenge to batteries. Especially in the old battery and winter, the battery’s charge acceptance ability is reduced, so it can’t always ensure sufficient charge in short distance travel. This may cause the battery to gradually discharge, so at some point, the battery no longer has enough energy to start the engine. Due to the special technology, the internal resistance of AGM battery is much lower than that of traditional battery in the whole service life, so it can ensure sufficient charge acceptance ability in a long time, and the short journey with multiple start-up and stop stages can be better handled by AGM battery.

Three advantages of AGM batteries

AGM battery2

Excellent cold-start characteristics

AGM battery has a large cold start current. They powerfully start the starting motor and reduce its running time. Due to the cycle stability of AGM battery, the engine can be shut down and restarted several times in a short time without any difficulty during restart.

Balanced state of charge

In modern vehicles, AGM battery is not only charged by generator, but also powered by braking energy recovery system. A normal starter battery must remain permanently charged and therefore cannot absorb the energy generated by recovery. The AGM battery can operate in the partial charging range, so it provides enough “extra” capacity to store the energy generated during braking.

High reserve capacity

High reserve capacity ensures the power supply of various electrical components. The cycle stability of AGM technology ensures the power supply of components, and also provides high starting power. Even if the battery is not fully charged, for example, an electronic assistant and a consumer are provided to ensure comfort during parking, or the generator has been temporarily decoupled to reduce the load on the engine.

Interesting facts about start-stop technology

start-stop technology3

The start stop system needs the battery of modern technology, because the ordinary start battery can not meet the high requirements of these vehicles. The electrical system structure of modern vehicles requires the use of compatible battery technology to make it work normally and reliably.

Therefore, in many vehicles, new batteries must be “registered” – the battery management system (BMS) must know which type of battery is installed in the vehicle in order to make full use of its potential. If an incorrect battery is installed or not properly registered in the vehicle, this will lead to premature battery aging and re failure.

Therefore, only start stop car batteries – EFB or AGM batteries should be installed on vehicles equipped with an automatic start stop system. If an AGM battery is already installed in the vehicle, replace it with another AGM battery.

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