The average unit volume or mass of battery energy released. Generally, under the same volume, the energy density of lithium-ion batteries is 2.5 times that of nickel-cadmium batteries and 1.8 times that of nickel-metal hydride batteries. Therefore, in the case of equal battery capacities, lithium-ion batteries will be more efficient than nickel-cadmium and nickel-metal hydride batteries. Smaller and lighter weight.
Battery energy density = battery capacity × discharge platform / battery thickness / battery width / battery length.
BYD
Currently, BYD lithium iron phosphate battery has an individual energy density of 150Wh, and BYD plans to continue to increase its energy density to 160Wh. In addition to lithium iron phosphate batteries, BYD is also developing ternary lithium batteries synchronously, and if the technology of ternary lithium batteries is incorporated into lithium iron phosphate batteries, some adjustments will be made to the original practice of using graphite as a negative electrode material, and then around 2020. BYD plans to raise the monomer energy density of lithium iron phosphate batteries to 200Wh.
In addition, in terms of follow-up ternary batteries, BYD's ternary batteries already have mass production conditions, and the current energy density has reached 200Wh/kg. The goal of BYD's triple battery is to reach a battery specific energy of 240Wh/kg in 2018 and 300Wh/kg in 2020.
Waterma
Production of 32650 cylindrical power lithium iron phosphate battery, monomer energy density has reached 145Wh/kg, the next goal is to achieve 160Wh/kg; triple battery current energy density of 200Wh/kg, is expected to reach 300Wh/kg by 2020 Level.
National Energy Battery
As early as 2013, Guoneng lithium iron phosphate and ternary battery monomer energy density reached 160Wh/kg and 200Wh/kg. It is estimated that by the end of 2017, the energy density of lithium iron phosphate battery will reach 180Wh/kg, the PACK will reach 134Wh/kg, and the ternary battery energy density will exceed 240Wh/kg.
Gateway Power
In terms of energy density, the company has now mass-produced a three-element soft pack battery with a specific energy of 210 WH/Kg. On the basis of improving battery safety, it is expected that in 2020 the company's soft pack battery cell energy density of up to 300WH/Kg, Pack up to 220WH/Kg; lithium titanate battery monomer energy density of 110WH/Kg or more.
Smart Energy
The company's production of power battery cell energy density up to 220Wh/Kg, PACK grouped after the energy density of 140Wh/Kg. At the same time, the company's BMS system can achieve 5 levels of protection. The battery packs are made of lightweight materials and structural optimization has been performed.
BAK battery
In 2016, BAK Sanyuan’s power battery industry accounted for more than 30%, ranking first. At present, the energy density of Baker's single cell is nearly 220Wh/kg, and it will be further increased to 300Wh/kg.
Carne new energy
Carnay New Energy has already supplied batches of energy density of 220Wh/kg batteries, with a system specific energy of more than 130Wh/kg batteries. At the same time, the technology and technology level have achieved 250Wh/kg and technical 300Wh/kg product reserves, respectively.
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