1,402 electric bicycle fires occurred nationwide in July! Beware of 5 signs of battery explosion

#千万IP创科普# Recently, the national electric bicycle safety hazard full chain rectification work team announced the national electric bicycle fire statistics in July. The data showed that from July 1 to July 31, a total of 1,402 electric bicycle fires occurred across the country!

Although electric bicycles make people's lives more convenient, once they catch fire,

It may cause great loss of life and property.

Electric bike catches fire

What problems might cause this?

Let’s take a look

01. Overcharging

If an electric bicycle is charged for too long, the battery will heat up, swell, or even explode . Let's take a look at the firefighters' experiment:

In the experiment, firefighters parked two fully charged electric bicycles in the corridor on the first floor and charged one of them with a non-original charger. After testing, it was found that within 3 minutes, the temperature inside the battery box quickly rose to nearly 900 degrees Celsius , and the ground temperature near the fire point reached 160 degrees Celsius.

02. Line aging

If an electric bicycle is used for too long, the connecting lines in the vehicle are prone to aging and loosening, causing leakage, poor contact or short circuit . If the vehicle's wires fail, the high temperature generated can easily ignite the vehicle's saddle and decorative plastic parts.

03. Improper use of charger

Many families have more than one electric bicycle. Mixing charging equipment for electric bicycles of different brands will also cause damage to the battery. The charger is a consumable item with a short lifespan and needs to be replaced in a timely manner. When replacing, pay attention to matching the battery model.

04. Illegal modification

Electric bicycle batteries generally include lead-acid batteries, lithium manganese oxide batteries, ternary lithium batteries, lithium iron phosphate batteries and other types. The charging voltages of various batteries are not exactly the same, and it is easy for them to be mixed during the modification process, resulting in overcharging and causing fire and explosion .

Preventing Electric Bicycle Fires

Pay attention to the correct use of batteries

What are the signs of battery explosion?

What should you do if a fire occurs?

Beware of 5 signs of battery explosion

01.Battery heating

The battery temperature continues to rise, exceeding 65°C and continuing to rise, which is an important precursor to battery explosion. Battery heating may be caused by external short circuit, overcharging or physical damage, and needs to be handled in time.

02.Battery deformation

The battery casing or single cell shows obvious swelling and deformation, which indicates that the battery has become unstable to a certain extent and has a high probability of turning into thermal runaway and combustion.

03. Electrolyte leakage

The battery electrolyte leaks to the outside through the sealing gasket or joint, which means that the battery protection structure has been damaged and the possibility of internal short circuit is high, posing certain safety hazards.

04. Pungent smell

The battery emits a pungent odor, which may be the gas produced by the decomposition of the electrolyte, indicating that the battery reaction has gotten out of control, causing excessive heat and combustion.

05. Abnormal current and voltage

The battery monitoring system detects abnormal fluctuations in current, voltage or internal resistance that exceed the normal operating range, which indicates that certain faults have occurred inside the battery and safety has decreased.

What should you do if an electric bicycle catches fire?

1. In case of fire on an electric bicycle, if conditions permit, the power switch should be turned off immediately to prevent electric shock or leakage accidents ;

2. Use ABC dry powder fire extinguisher or carbon dioxide fire extinguisher to extinguish the fire. If there is no fire extinguisher nearby, you can also use dry sand to sprinkle on the fire point to extinguish the fire;

3. If the fire is urgent and difficult to control, call 119 immediately for help.

How to choose a qualified electric bicycle?

It is recommended to choose an electric bicycle brand with high popularity and good reputation;

Check and understand the product's "three guarantees" period and the number of local after-sales service outlets to facilitate later repairs and maintenance;

Check the CCC certification mark of the vehicle, and verify the consistency between the certificate and the overall appearance of the vehicle, especially the length of the saddle. If there is a big discrepancy, it may be that the dealer is suspected of unauthorized modification, which may seriously affect the safety of riding the electric vehicle;

Feel whether the vehicle starts, accelerates, and runs smoothly, whether the vehicle is comfortable to operate, check the tightness of the brakes, the flexibility of the handlebars, and the mobility of the wheels to ensure that the vehicle you choose is suitable for your own control;

Do not modify the electric bicycle without authorization or ask the seller to modify it, so as not to bury hidden dangers to future driving safety;

You can confirm whether the battery complies with the "Technical Specifications" requirements by checking the battery's nameplate, specification sheet, instructions for use and other information, or by asking the seller to provide the product's corresponding "Technical Specifications" test report or certification certificate.