A car battery is not just a source of power to start the engine, but a critical element of the vehicle's electrical system. Without it, it is impossible to imagine the operation of the starter, lighting, on-board computer or security systems. But when did the first battery suitable for use in cars appear? And how did it evolve to modern times? AGM, EFB and lithium-ion batteries?
In this article we will look at key milestones in the history of battery creation: from experiments with galvanic cells in the 19th century to mass production of lead-acid batteries, which are still the standard for most cars. You will also learn how the requirements for batteries have changed with the development of the automotive industry and what technological breakthroughs made it possible to increase their capacity, reliability and service life.
First steps: galvanic cells and experiments of the 19th century
The origins of car batteries go back to 1800when the Italian physicist Alessandro Volta invented the first chemical current source - volt pole. It was a collection of zinc and copper plates separated by a cloth soaked in salt water. Although the device could not store energy (that is, it was not a battery in the modern sense), it proved the possibility of generating electricity chemically.
First rechargeable battery appeared only in 1859when a French scientist Gaston Plante created the lead-acid battery. Its design consisted of two lead plates immersed in sulfuric acid. After several charge-discharge cycles, the device’s capacity increased - this became a revolution. However, such batteries were bulky, heavy and required regular maintenance.
- 🔋 1800 — Voltaic pole (the first chemical current source, but not a battery).
- 🔄 1859 — Gaston Plante invented the first lead-acid battery.
- ⚡ 1881 — Camille Faure improved the design by adding antimony to the lead plates to increase strength.
Interestingly, the first batteries were not used in cars (they simply did not exist in the form we are familiar with), but in telegraphy, lighting, and even in submarines. It was only with the advent of electric vehicles at the end of the 19th century that the need for compact and powerful power supplies arose.
The emergence of car batteries: the beginning of the 20th century
The first production cars, such as Benz Patent-Motorwagen (1886), they did without batteries - magnetos or dry elements were used for ignition. However, with the development of electrical systems (headlights, starter, signal), a reliable source of energy was required. The first car batteries appeared in 1910–1920swhen companies Exide and Willard began producing lead-acid batteries adapted for vehicles.
The key event was 1912when Cadillac equipped its models with an electric starter powered by a battery. This is an invention Charles Kettering made cars more accessible to the general public (previously, manual cranking was required to start the engine). From that moment on, the battery became an integral part of the car.
⚠️ Attention: Early car batteries required weekly maintenance - topping up with distilled water and checking the density of the electrolyte. Modern maintenance-free batteries lack this drawback, but are still sensitive to deep discharges.
| Year | Event | Impact on the auto industry |
|---|---|---|
| 1912 | The advent of the electric starter (Cadillac) | The battery has become a mandatory element of the car |
| 1920s | Mass production of lead-acid batteries (Exide, Willard) | Voltage standardization 6V, then 12V |
| 1950s | Transition to 12-volt systems | Increasing the power of starters and electrical equipment |
| 1970s | The appearance of maintenance-free batteries | Reduced maintenance requirements, increased service life |
B 1950s there was a transition from 6-volt systems to 12-volt systems, which was associated with an increase in vehicle energy consumption (powerful starters, additional equipment). This also influenced the design of the batteries: now they consisted of 6 series-connected banks of 2V each.
Technology evolution: from lead to AGM and lithium
Before 1970s all car batteries were served — owners had to regularly check the electrolyte level and add water. The situation changed with the advent maintenance-free batteries, which used alloys of lead and calcium. This reduced water evaporation and increased service life.
The next leap occurred in 1980–1990swhen were developed:
- 🔋 AGM (Absorbent Glass Mat) — the electrolyte is retained in fiberglass mats, which increases vibration resistance and charging speed. Used in vehicles with the system Start-Stop.
- ⚡ EFB (Enhanced Flooded Battery) — an improved version of the classic lead-acid battery with increased resistance to cyclic discharges.
- 🔋 Lithium-ion batteries - light and compact, but expensive. Used in hybrid and electric vehicles (for example, Tesla, Toyota Prius).
Today 90% passenger cars are equipped with lead-acid batteries (including AGM and EFB), while lithium-ion batteries remain a niche solution due to their high cost and demanding control system.
Why are AGM batteries more expensive than regular ones?
AGM plates use absorbed electrolyte technology, which increases their service life by 2–3 times compared to classic batteries. They can withstand up to 300–500 deep discharge cycles (versus 50–100 for conventional ones), which is critical for machines with a Start-Stop system. In addition, AGMs are less susceptible to sulfation and perform better at low temperatures.
Modern standards and requirements for batteries
With the development of automotive technology, the requirements for batteries have also changed. Modern batteries should:
- 🔌 Provide high starting current (from 400 to 1000 A) for reliable engine starting in cold weather.
- 🔄 Endure frequent discharge-charge cycles (relevant for cars with a system Start-Stop).
- 🌡️ Work in a wide temperature range (from -30°C to +60°C).
- 🔋 Have a low self-discharge (no more than 3–5% per month).
To select a battery today, several key parameters are used:
| Parameter | Description | Example value |
|---|---|---|
| Capacity (Ah) | The amount of energy that the battery can supply | 60 Ah, 75 Ah, 100 Ah |
| Starting current (A) | Maximum current when starting the engine | 500 A, 600 A, 800 A |
| Standard size | Dimensions and polarity of terminals | European (242×175×190 mm), Asian (232×173×225 mm) |
| Technology | Construction type | Lead-acid, AGM, EFB, Li-ion |
When choosing a battery, it is important to consider car manufacturer's recommendations, since an unsuitable battery can lead to electronic malfunctions or even failure of the generator. For example, for machines with a system Start-Stop Only AGM or EFB batteries are suitable.
Check the required capacity and starting current in the owner's manual|
Check terminal size and polarity (forward/reverse)|
Determine the type of battery (regular, AGM, EFB) depending on the equipment of the machine |
Compare brands (eg. Bosch, Varta, Mutlu) and warranty period |
Buy a battery no older than 6 months (see the production date on the case) -->
The future of car batteries: trends and innovations
The auto industry does not stand still, and battery technology continues to evolve. Among the key trends:
- 🔋 Solid State Batteries — instead of liquid electrolyte, solid polymers are used, which increases safety and energy intensity. Developed for electric vehicles (eg Toyota plans to release by 2027).
- ♻️ Disposal and recycling — up to 95% of lead from old batteries is recycled today, but scientists are looking for ways to make the process more environmentally friendly.
- ⚡ Fast charging — new lithium-ion and lithium iron phosphate (LFP) batteries allow you to charge up to 80% in 15–20 minutes.
Mass adoption is expected in the next 5–10 years lithium-sulfur and sodium ion batteries that are cheaper and more environmentally friendly than lithium-ion ones. However, lead-acid batteries will remain relevant for traditional internal combustion engines for a long time due to their low cost and proven reliability.
⚠️ Attention: When buying a used car, be sure to check the condition of the battery! The average service life of a modern battery is 4–5 years. If the battery is older, be prepared to replace it soon, especially before the winter season.
Practical tips: how to extend battery life
Even the best quality battery will not last long if you do not follow simple operating rules. Here's what will help extend its life:
If you rarely use the car, disconnect the negative terminal of the battery or use charger (for example, CTEK MXS 5.0) to maintain the charge level. This will prevent deep discharge, which is detrimental to lead-acid batteries.
- 🔌 Check voltage regularly - normal indicator with the engine turned off:
12.6–12.7 V. If below12.4 V, requires recharging. - 🚗 Avoid short trips — the generator does not have time to restore the battery charge, especially in winter.
- 🔧 Clean the terminals — oxidation increases resistance and impairs current conductivity. Use special lubricant (for example, Liqui Moly Batterie-Pol-Fett).
- 🌡️ Monitor the temperature — at -20°C the battery capacity drops by 30–40%. Use in cold weather preheater or take the battery home (relevant for removable batteries).
If the battery is still discharged, do not try to jump start the car on modern cars with sensitive electronics. Better use starter charger (for example, Berkut JSL-12000) or charge the battery with a stationary charger.
The main reason for premature battery failure is deep discharge and long-term storage in a discharged state. Even one such incident can reduce battery life by 30%.
FAQ: Frequently asked questions about car batteries
Is it possible to install a battery with a larger capacity than the manufacturer recommends?
Yes, but with reservations. For example, if the instructions indicate the capacity 60 Ah, and you put 75 Ah, it will not harm the car. The main thing is that starting current and dimensions coincided. However, the capacity is too large (e.g. 100 Ah instead of 60 Ah) can lead to undercharging of the battery, since the generator cannot cope with its full charging.
How to find out the production date of a battery?
The date is usually encoded on the case. For example, at Bosch and Varta format used C1 B2 999 999 123, where C1 - month (A=January, B=February, ..., L=December), and B2 — year (B=2011, C=2012, ..., M=2022, N=2023, etc.). U Mutlu the date is marked openly, for example, 03.2023.
What happens if you reverse the polarity when connecting the battery?
This will lead to short circuit, blown fuses, and in the worst case - failure of the generator, control unit or even fire. Always check polarity: positive terminal usually thicker and marked in red, minus - black.
How long does it take to fully charge a discharged battery?
The time depends on the battery capacity and the current of the charger. Optimal current - 10% of capacity (for example, for 60 Ah this is 6 A). In this case, a full charge will take approximately 10–12 hours. Fast current charging 20–30 A reduces time to 2–3 hours, but reduces battery life.
Is it possible to restore an old battery?
Partially yes. If the battery is sulfated (white coating on the plates), you can try desulfation special chargers (for example, OptiMate TM251). However, if the plates are physically destroyed or the cans are short-circuited, restoration is impossible. In such cases, it is cheaper to buy a new battery.