Pacific Automotive Network ternary lithium batteries and lithium manganese oxide batteries can be mixed. In terms of safety, lithium manganese batteries are much safer than ternary batteries in terms of lifespan, battery performance and other factors. and ternary lithium batteries are equivalent.
Safety in the battery industry still relies primarily on spontaneous combustion.
The three elements of combustion: temperature, fuels and oxygen.
When evaluating the safety of lithium batteries, it mainly depends on how well the lithium battery avoids the occurrence of three combustion factors at the same time.
As long as there is a short circuit, high temperature will occur. However, heat can be quickly dissipated by increasing the specific heat dissipation surface area of the battery. PaFor example, in BYD's blade battery design, the battery itself is a huge heat sink.
The main combustible substance in the battery is the electrolyte. The flash points of electrolytes of different formulas are different, some are 100 degrees and some can reach more than 200 degrees. But generally speaking, the electrolyte with the best electrical properties will have a lower flash point.
Lithium batteries have a closed structure and the negative electrode is often made of graphite, so oxygen is often precipitated from the oxide of the positive electrode. Especially when a short circuit in the battery generates high temperature, the oxide of the positive electrode decomposes under the action of high temperature and releases oxygen. Different material systems have different high temperature resistance properties. Even for iron phosphate material andof relatively high temperature resistant lithium, the manufacturing processes and cost budgets of different manufacturers will bring completely different properties, so it always depends on the manufacturer's formulation process. Generalize.
Ternary batteries can easily pass the acupuncture experiments with the combination of semi-solid gel electrolytes, but the energy density and charging and discharging current will be lower than conventional systems. current NCA811 and LCO with silicon-carbon negative electrode.
It depends solely on the choice of the manufacturer and the importance given to safety by the consumer.
However, the reality is that unless safety is mandated by national standards, the consumer market will not place any value on safety. Safety is just a selling point marketed by manufacturers.
Regarding Yadi's new battery: social securityrity, BYD did a better way to promote it, by releasing experimental videos.
Acupuncture testing, overload testing, high temperature durability testing, etc. After the comparative experiment results are published, you can judge the difference, and the publicity effect is very significant.
(Images/Text/Photos: Pacific Automotive Network Q&A)
Tesla uses ternary lithium batteries:
1. Phosphoric acid batteries using lithium iron as the cathode. The material has a long charge and discharge cycle life, but its disadvantages are that there are large deviations in energy density, high and low temperature performance and charge and discharge rate characteristics, and the production cost is high. lithium iron phosphate battery technology and applications. have already encountered the development bottleneck; the batteries haveu lithium manganate have low energy density, poor cycle stability and high temperature storage performance, so lithium manganate is only used as the cathode material for the first generation of power lithium batteries international;
2. Multi-materials are increasingly considered and recognized by the industry due to their dual advantages in overall performance and cost, and gradually surpass lithium iron phosphate and lithium manganate to become the dominant technology.surgical route;
3. A relatively balanced material in terms of capacity and safety, with better cycle performance than normal lithium cobalt oxide at the beginning, for technical reasons its rated voltage was only 3.5-. 3.6 V. In terms of usage range, there are some restrictions, but so far with continuous improvementDue to the formula and improvement of the structure, the rated voltage of the battery has reached 3.7V and the capacity has reached or exceeded the level of lithium cobalt oxide batteries.
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