Battery "unrolling", 1 million kilometers of safe driving, What breakthroughs does Geely’s latest short blade battery technology have?

PanSemicon2024 July 2, 2017 15:11 Hebei

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Geely Auto Group has released its latest generation of lithium iron phosphate short blade batteries developed independently.

With best-in-class battery life, charging speed and ultimate safety. Geely Auto's new short blade

Electric vehicle battery technology will set a new benchmark for electric vehicle batteries, with industry-leading safety,

Compact size, higher energy density, better volume utilization and greater flexibility.

Adapt to different battery pack designs.

 New safety standards

The new short-blade electric vehicle battery technology uses a high-strength, high-thermal stability, high-heat-resistant separator with

A highly stable separator is paired with a safe electrode, resulting in higher energy density and safety.

In addition, Geely Auto has applied its self-developed self-melting technology to the electrode surface to prevent accidental

Prevents short circuits. If the battery is punctured during an extreme impact, the aluminum foil layer will melt into the battery separator

To form an insulating layer to prevent short circuits and thermal runaway events.

The standard automotive test for energy efficiency is a single-needle puncture test, but Geely Auto has been testing a new short-blade electric

Automotive battery technology uses eight puncture needles simultaneously, which greatly increases the damage in extreme collision situations.

During the test, it was pierced by eight 5mm diameter steel needles at the same time.

 After standing for 1 hour, there is no adverse effect.

In addition, the new electric vehicle battery technology has also been used to test the 5.8 mm (5.8×42 mm) infantry rifle bullet.

During the projectile penetration test, no hot ignition incidents occurred.Exceeding industry benchmarks and rigorous testing

In addition to passing the 8- pin puncture test, Geely also conducted industry tests on the new short-blade electric vehicle battery technology.

The world's first "six-pole" series of tests, including seawater corrosion immersion, extreme cold environment, high-frequency battery pack bottom

Scrapes, 26-ton overload rollovers, single-battery side impacts and fire.

Patented grid design, energy absorption cavity, three-layer sandwich bottom guard plate, CTB integration, thermal

The battery successfully passed all six tests including the runaway control system and various other safety features.

Geely tested its new short-blade EV battery technology under conditions several times higher than the industry standard.

The results showed that the new electric vehicle battery technology did not experience thermal runaway, smoke,

Ignition or combustion. In addition, the insulation resistance value of the battery electrodes and the sealing state of the battery cells remain normal.

The results speak for themselves, showing that the new short-blade EV battery remains safe in the most extreme conditions

reliable.

1 million kilometers of safe driving

The use of multi-element doped electrode materials, combined with the smaller size and low internal resistance of the battery, makes the new short blade

Electric vehicle battery technology reduces the rate of internal chemical reactions, significantly extending the battery's lifespan.

According to Geely's tests, the new Tandao electric vehicle battery technology can have a cycle life of 3,500

The cycle is equivalent to charging and driving 1 million kilometers, with minimal impact on battery life.

If an average family travels 20,000 kilometers per year, the new short-blade electric car battery technology can last up to 50

By 2020, the battery life will be greatly extended, the residual value of used electric vehicles will be increased, and carbon emissions will be reduced annually.

More than 80,000 tons.

Ultra-fast charging and stable low-temperature performance

The new short-blade EV battery technology effectively solves the problem of high internal resistance in long-blade batteries on the market.

Geely's latest battery also uses long, thin carbon nanotubes to create a "highway" for ion transport.

Additives are added to improve the membrane permeability, making it easier for lithium ions to move between the electrodes.

And greatly improved the fast charging performance.Test data shows that among blade batteries of the same capacity, the SOC of the long blade battery is 10-80% higher than that of the long blade battery.

The average charging time is 26 minutes, the average charging rate is 1.61C, and the

new short knife EV battery technology is used.

The average time was 17 minutes and 4 seconds, and the average charging rate was 2.45C.

In addition, in extremely cold environments, the new electric vehicle battery technology has stronger discharge than the long blade battery.

At an ambient temperature of -30°C, the Long Blade battery maintains its capacity.

The average retention rate dropped to 78.96%, while the capacity retention rate of the new short-blade electric vehicle battery technology was

90.54%.

 Source: batteries news

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