Panasonic battery performance. It is well known that lithium battery performance is mainly determined by the positive electrode, negative electrode, electrolyte and diaphragm. The positive and negative materials have important influence on the key indexes such as capacity, energy density, cycle life, safety, magnification performance and cost.
Although with the ternary as the cathode material, but the lithium titanate battery is to break the graphene as the negative of the traditional battery technology line, changed to lithium titanate as the anode material, which makes it a similar phenomenon in the eyes of peers. But it is the characteristics of lithium titanate, Panasonic Battery so that the material of the battery has a significant feature.
Panasonic battery to lithium iron phosphate - graphene, ternary - graphene, ternary - lithium titanate three lithium batteries, for example, from the energy density point of view, lithium titanate battery at a disadvantage. Northeast Railway (000,686, stock it) reported that the current lithium iron phosphate battery than the actual energy of 100-120Wh / kg, three yuan battery was 150-200Wh / kg, of which Tesla nickel-cobalt aluminum battery used more Is to reach 252Wh / kg, while the silver dragon lithium titanate battery only 90Wh / kg, Panasonic Battery only some of the graphite anode electrode battery half.
And then from the cost, lithium titanate battery is no advantage. At present, the silver dragon lithium titanate battery raw materials, including titanium hydroxide and lithium hydroxide, the price is higher than the graphite anode material. According to the results of China's battery network research, the current lithium iron phosphate, ternary battery costs 1,100 yuan / kwh-1200 yuan / kwh, Panasonic Battery while the cost of lithium titanate battery is about three times the battery.
Energy density is twice as low, the cost is higher than 2-3 times, Panasonic battery how to participate in market competition? Obviously, it is its own unique advantages touched some of the industry.
First of all, from the battery's most important safety considerations, lithium titanate thriving.
Panasonic battery as a negative material when the potential platform up to 1.55V, than the traditional graphite anode material more than 1V, although the loss of some energy density, but also means that the battery more secure. Technical experts Lu blue light has said that the battery charge quickly when the negative voltage demand is relatively low, but if too low, lithium battery is easy to precipitate very lively lithium metal, this lithium ion is not only conductive, but also with the electrolyte reaction, and then Release heat, Panasonic Battery produce combustible gas, causing a fire. And lithium titanate because of the high out of 1V voltage to avoid the negative voltage of 0 cases, it will indirectly avoid the lithium ion precipitation, thus ensuring the safety of the battery.
As the Panasonic battery in high temperature, low temperature environment can achieve safe use, but also reflects its resistance to wide temperature (especially low temperature) an important advantage. At present, Yinlong lithium titanate battery safety operating temperature range between -50 degrees to 65 degrees, while the ordinary graphite negative battery temperature below -20 degrees when the energy began to decay, -30 degrees when the charge capacity is only Charge the total capacity of 14%, in the cold weather simply can not work properly.
In addition, because the lithium titanate battery even overcharged, only 1% of the volume change, known as zero-strain material, which makes it has a very long life. Silver Long chairman Wei Yincang has said that Yinlong lithium titanate battery life of up to 30 years, and the car life is equal, while the average life of ordinary graphite anode battery life, but 3-4 years. From the full life cycle, Panasonic Battery lithium titanate battery costs lower.
Panasonic battery's last advantage is the rapid charge and discharge capacity, high charge rate. At present, Yinlong lithium titanate battery charging rate of 10C, or even 20C, while the ordinary graphite anode battery charging rate of only 2C-4C.
Based on the technical characteristics of Panasonic battery, the industry believes that it fit the new energy bus, large-scale energy storage equipment needs. Take the bus, the general single mileage of not more than 40 km, each terminal waiting to wait until the next departure time interval of at least a few minutes. At this time the low energy density of Panasonic battery will not affect the use of the bus, but reflects the benefits of the battery fast charge. As a public transport, the bus on the battery safety, durability have put forward higher requirements.