Battery Selection for Start-Stop System in Vehicles

Start-stop batteries are designed to meet the environmental and energy-saving requirements of modern vehicles by reducing fuel consumption and emissions through engine start and stop. Currently, the two main types of batteries used in the market are lead-acid and lithium iron phosphate batteries. Below are their respective advantages and disadvantages:

Lead-acid batteries:

Relatively low cost, mature technology, and widely used in the market;
High safety, overcharging, overcurrent, and overdischarge will not cause explosion;
In cold areas, it is difficult to start the battery at -20°C;
Relatively short cycle life, usually only 250-300 cycles, and a service life of about one year;
Large internal resistance, generally 3 milliohm, and the internal resistance will rise sharply after three months. Once the internal resistance reaches 5 milliohm, the battery is basically scrapped;
Low recycling rate and contains harmful substances.

Lithium iron phosphate batteries:

Long cycle life, about 2000 cycles, and a service life of up to ten years;
High safety, with overcharge, overcurrent, overdischarge, and temperature control protection functions;
High recycling rate, no harmful substances, can be recycled;
Good high-temperature performance, with a working temperature range between -20°C and 80°C;
High energy density, with a 50% higher capacity than lead-acid batteries and 70% less weight than lead-acid batteries of the same volume;
Can improve power and reduce fuel consumption, with fast ignition speed and complete fuel combustion;
Can support long-term storage, with low standby power consumption.

In summary, lithium iron phosphate batteries have obvious advantages, but the price is relatively higher than that of lead-acid batteries. If you only need a relatively low cost battery and use it more in less cold areas, then a lead acid battery may be more suitable for your needs. The following table summarises the relevant information: Lead-acid batteries Lithium iron phosphate batteries

Our lithium iron phosphate start-stop battery can compete with VARTA. As more and more luxury and high-end vehicles choose to use lithium iron phosphate batteries instead of lead-acid batteries, it is clear that the safety of lithium iron phosphate batteries has been verified. We can offer them the same solution at a lower cost, to serve a wider range of vehicles to enjoy the high-performance and long lifespan of lithium iron phosphate batteries. The main component of lithium iron phosphate batteries is iron, which is similar to lead, the main component of lead-acid batteries, and is not easily prone to fire or explosion.