Why Do Electric Vehicle Batteries Explode? - Techyev.com

Electric Vehicle Batteries are a type of rechargeable batteries which are used to power up the electric motors of any electric vehicle. These are also known as Traction Batteries. The EV batteries are particularly designed for high electric charge capacity.

As per the question do EV batteries explode, the answer is Yes, it's because of two reasons, the first one is the manufacturing defect of the battery, and the second reason results in multiple factors like vibration, short circuits, accidents, or just fluke. Vibration here means the capability of the lithium-ion battery is way beyond which can cause fire risk too.

Electric Vehicle Batteries


How do Lithium-ion Electric Vehicle Batteries Work?

Every Electric Vehicle includes an electric traction motor instead of the Internal Combustion Engine used in gasoline vehicles. The battery is the heart of an electric vehicle that runs everything like a controller which runs an electric motor, so it has to be long-lasting and powerful enough, and the driver can go anywhere with minimum re-charging.

Electric vehicles use a traction battery pack taking advantage of the chemistry of its materials. A battery is a device for chemical energy storing and converting into electricity. The traction battery pack or lithium-ion battery inside any electric vehicle is an assembly of individual batteries that combines to form a battery pack. The individual lithium-ion cell in most rechargeable electric vehicle batteries has the same basic components, electrodes, electrolytes, and separators. The positive electrode is called the cathode which features metal oxide (cobalt). The negative electrode is called an anode which is made of graphite.


"The Cathode is the single expensive element. Most of the lithium-ion batteries are of two types Nickel Cobalt Manganese (NCM) or Lithium Iron Phosphate (LFP)."


When the battery is used and stored energy is discharged, the ions (tiny particles) inside the battery moves from anode to cathode through a chemical solution called an electrolyte, generating an electric current. When the battery is recharged, particles flow back from the cathode to the anode. A liquid electrolyte makes easier lithium-ion movement from anode to cathode. The porous separator is vital in maintaining battery safety to keep the anode and cathode from coming into direct contact with each other.

When a lithium-ion battery powers a device the lithium charged to the graphite-anode loses electrons. This process generates lithium -ions as well as free electrons. The lithium-ions travel from anode to cathode via electrolyte and separator. When the battery needs to be recharged the process starts all over but in reverse.

This is why lithium-ion batteries are suitable for use in EVs because this process can be repeated several times. During, the lithium-ion battery at the charge, the charger forces electrons to the cathode, transferring to the anode. The entire chemical process occurs when a battery is discharged. To reverse, ions leave the cathode and return to the anode, After the charging process the battery is ready for use.


Electric vehicle batteries working


How are Electric Vehicle Batteries made?

The batteries that are used in Electric Vehicles recharge fully with minimum energy loss. The main elements inside Lithium-ion batteries are an anode, cathode, electrolyte, separator, and lithium-ions. The battery contains roughly 17 pounds of lithium carbonate, 77 pounds of nickel, 44 pounds of manganese, and 30 pounds of cobalt. The batteries are made using carbon, graphite, metal oxide, and a lithium salt.

The main component of EV batteries is being lithium and the demand for this component is at an all-time high. Materials that are used in these batteries like cobalt, nickel, and lithium all are extracted by environmentally damaging methods.

Where do the Organic Matters for Electric Vehicle Batteries come from?

Most battery packs for electric vehicles come from China. The materials that combine to make batteries come from different specific countries half of the world's cobalt is extracted from the Democratic Republic of Congo, Nickel is found in Australia, Brazil, and Indonesia, and 75% of Lithium is extracted in South America, particularly in Chile, Bolivia, and Argentina.

Researchers are solving ways to extract nickel and cobalt from batteries. Energy-X has developed the Lithium extraction process using Direct Lithium Extraction (DLE). This method collects a larger lithium yield at a faster rate and cost without using much water.


Electric vehicle batteries materials


What is the capacity of Electric vehicle batteries?

Electric vehicle owners have to know that nowadays engine size is not more important than petrol-guzzling vehicles. The important statistic is battery capacity that how efficiently vehicles use energy, which determines the range.

The vehicle's battery capacity can be measured in its ability to produce a set power output (in kilowatts) in a certain time period (in hours). A 60-kWh battery which is the common battery size of EVs allows three hours to travel. But in the real world, the distance you can travel on a single charge could be different reasons like temperature and speed you are driving.

The interesting fact is that the motors in the electric vehicle also work as a generator that can power a house. As you take your foot from the accelerator in electric vehicles, the vehicle converts its forward motion back into electricity. When you apply the brakes, the regenerative braking process happens more strongly, otherwise, the electricity that would be lost is stored in the battery to increase the range.



How do Electric Vehicle Batteries differ from Regular Vehicle Batteries?

Most drivers are confused about the difference between the batteries used in an electric vehicle and standard vehicle batteries which are required for traditional Internal Combustion Engines. An EV also uses 2 types of batteries that serve distinct purposes-
  • Lithium-ion battery
  • Deep-cycle battery
Both gas-fueled and electric vehicles use a lead-acid battery that uses the same chemistry to operate. Designed for the gas engine, an internal combustion battery requires a short burst of high energy to start the car, then the vehicle's alternator takes over the power supply.

An EV deep-cycle battery is designed to discharge energy while the vehicle runs. Commonly known as a 12-volt battery, lead acid batteries technically produce 12.6 volts of energy which consists of 6 cells and each makes 2.1-volts. These batteries convert chemical energy into electrical energy and the electrical current is produced as a result of a chemical reaction. A 12-volt battery powers a gas engine which requires thin plates. The thinner component allows electrons to move quickly through the system during start-ups. It is designed for a quick powerful bursts of energy.

Designed by repeatedly discharging energy, an EV battery requires thicker plates than the gasoline-fueled prototype. So, it doesn't have the same power to startup, it provides sustained energy.

Electric vehicle batteries recycling diagram


Can Electric Vehicle Batteries be recycled?

Like smartphones, EVs also have Lithium-ion batteries, The lead-acid batteries used in ICEs are widely recycled, but they can't be the same as lithium-ion batteries in electric vehicles. Currently, only 5% of lithium-ion batteries are recycled globally because of the high cost more than to mine new lithium. Still, most of the lithium-ion battery parts can be recycled.

The only EV battery material that can be recycled today is cobalt which leaves nickel, manganese, and lithium which are not economically recyclable and require additional cost, which is not only bad for the environment and left a ton of materials. The two main methods for recycling electric vehicle batteries involve extreme temperature or acid. Both processes generate emissions and create waste which can end up in the environment. The cost that is used for transporting the batteries from one place to another is expensive which is 40% of the overall cost of recycling.



Frequently Asked Questions:

  • How bad are EV Batteries for Environment?
Though electric vehicles produce zero-emission the manufacturing phase produces harmful emissions. Lthium-ion batteries are made using rare earth elements that can be mined, the mining operations harm the environment.

  • Do Electric vehicle batteries charge while driving?
Yes, the EV batteries charge while driving and the system is called a Re-generative braking system.

  • What are the methods of EV battery Recharging?
The methods by which the EV batteries can recharge are electric vehicle charging stations, regenerative braking, and Internal Combustion Engines(hybrid).


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