CATL presents battery for long-range hybrid vehicles
The Freevoy Super Hybrid Battery promises to eliminate short-range, slow charging and reduced low-temperature performance experienced by EREVs and PHEVs owners. As reported by CATL, EREVs and PHEVs owners can now travel over 280 kilometres of range in 10 minutes of charging, thanks to the ultra-fast charging product. While brands like Li Auto, Avatr, Deepal, Changan Nevo and Neta are reported to already enjoy the new ultra-fast charging product, by 2025, the battery will be deployed on 30 more hybrid vehicle models.
To begin the design of the new Freevoy ultra-fast charging battery, CATL employed AB battery system integration technology to combine sodium-ion batteries and lithium-ion batteries in a defined ratio and arrangement. CATL utilized mixed, serial, and parallel connections of the sodium-ion batteries and lithium-ion batteries. This improved the low-temperature range by 5%. Subsequently, the sodium-ion battery was taken as the SOC benchmark for monitoring the AB battery system to assist in calibrating the lithium-ion battery’s charge level.
According to CATL, the product is made up of a surface modification technology for the cathode material and a high-voltage electrolyte formulation, providing a nano protective layer. It is believed that, with this innovative design, side reactions within the active layer are reduced. The Super Hybrid Battery boasts efficient lithium-ion transport as CATL employs cathode fast ion conductor coating technology as well as second-generation fast-charging graphite and novel nano-coating technologies for the anode. Meanwhile, high-activity, excited-state particles were incorporated into the cathode material.
While designing the battery, CATL incorporated BMS intelligent algorithm and hardware which is optimized to increase the SOC control accuracy of Freevoy by 40% and also increase the pure electric utilization rate by more than 10%. What’s more, a multi-level power predictive model was deployed for the charge-discharge polarization characteristics of the battery. This effort improved the power performance of the hybrid vehicles by 20%.
CATL also reported that Freevoy can efficiently operate in harsh temperature conditions, featuring discharge and charging capabilities in extreme cold temperatures down to -40 degrees Celsius and -30 degrees Celsius respectively. Thanks to the full temperature range accurate BMS technology, the product can efficiently surmount challenges with inaccurate charge prediction or attenuated power performance in harsh high and low-temperature environments. This BMS technology also functions to address the performance mismatch between lithium-ion and sodium-ion batteries at low temperatures.
With the new ultra-fast charging 4C Battery, CATL aims to revolutionize innovation in battery technology for EREVs and PHEVs.
Author: Abdulwaliy Oyekunle
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