BYD's Blade Battery designed for improved safety
BYD announced the launch of its Blade Battery, which the company says was intended to mitigate concerns about battery safety in electric vehicles. At the recent online launch event, Wang Chuanfu, BYD Chairman and President, explained that the battery reflects the company’s determination to resolve issues in battery safety while also redefining safety standards for the entire industry.
The company highlighted a video of the new battery successfully passing a nail penetration test, which is seen as the most rigorous way to test the thermal runaway of batteries due to its sheer difficulty.
“In terms of battery safety and energy density, BYD’s Blade Battery has obvious advantages,” said Ouyang Minggao, Member of the Chinese Academy of Sciences and Professor at Tsinghua University.
The battery has been developed over the past several years. The singular cells are arranged together in an array and then inserted into a battery pack. According to the company, due to its optimized battery pack structure, the space utilization of the pack is increased by over 50% compared to conventional lithium iron phosphate block batteries.
While undergoing nail penetration tests, it emitted neither smoke nor fire after being penetrated, and its surface temperature only reached 30 to 60° C (86° to 140° F). Under the same conditions, a ternary lithium battery exceeded 500° C (932° F) 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 (392° to 752° F), reports the company. This implies that EVs equipped with the Blade Battery would be far less susceptible to catching fire even when they are severely damaged.
It also passed other extreme test conditions, such as being crushed, bent, being heated in a furnace to 300° C (572° F), and overcharged by 260%. The company reports that 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 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.
The company says that 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 industry. It is due to this unpractical focus on “energy density” that safety has been sidelined from power battery development. This new battery aims to bring 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 Long. He added that the company 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 new battery. The new model will lead the brand’s Dynasty Family, boasting a cruising range of 605 km (375 mi) and an acceleration of 0 to 100 km/h (0 to 62 mi/h) in just 3.9 seconds.
For more information, visit https://en.byd.com.