BYD, one of China’s largest privately-owned enterprises has spent the last several years developing a new battery called the Blade Battery. The Blade Battery singular cells are arranged together in an array and then inserted into a battery pack. Due to the way the battery pack is structured, the space utilization of the battery pack is increased by over 50% compared to conventional lithium iron phosphate block batteries.
Key features of the Blade Battery:
- Surface temperature only reached 30 to 60°C while undergoing nail penetration tests, a ternary lithium battery exceeded 500°C.
- Would be far less susceptible to catching fire.
- Passed other extreme test conditions, including being crushed, bent, heated in a furnace to 300°C and overcharged by 260%.
- Slow heat release and low heat generation
While undergoing nail penetration tests, the Blade Battery emitted neither smoke nor fire after being penetrated, and its surface temperature only reached 30 to 60°C. Under the same conditions, a ternary lithium battery exceeded 500°C and violently burned, and while a conventional lithium iron phosphate block battery did not openly emit flames or smoke, its surface temperature reached dangerous temperatures of 200 to 400°C. This implies that EVs equipped with the Blade Battery would be far less susceptible to catching fire – even when they are severely damaged.
The Blade Battery also passed other extreme test conditions, such as being crushed, bent, being heated in a furnace to 300°C and overcharged by 260%. None of these resulted in a fire or explosion.
He Long, Vice President of BYD and Chairman of FinDreams Battery Co., Ltd., covered four distinct advantages of the Blade Battery including a high starting temperature for exothermic reactions, slow heat release and low heat generation, as well as its ability to not release oxygen during breakdowns or easily catch fire.
In the past few years, many EV manufacturers have fallen into a competition for ever-greater cruising range. When the range becomes the prime factor to consider, this focus is then transferred to power battery makers, leading to unreasonable pursuits of “energy density” in the battery industry. It is due to this unpractical focus on “energy density” that safety has been side-lined from power battery development. BYD’s Blade Battery aims to bring battery safety back to the forefront, a redirection from the industry’s tenuous focus on this crucial aspect.
“Today, many vehicle brands are in discussion with us about partnerships based on the technology of the Blade Battery,” said He Long. He added that BYD will gladly share and work with global partners to achieve mutually beneficial outcomes for all industry players.
The Han EV, BYD’s flagship sedan model slated for launch this June, will come equipped with the Blade Battery. The new model will lead the brand’s Dynasty Family, boasting a cruising range of 605 kilometres and an acceleration of 0 to 100km/h in just 3.9 seconds.