Why is the car battery still useless with the advantage of lithium batteries

We know that lithium batteries are widely used in the field of new energy car power lithium-ion batteries due to their light weight, high energy density, and environmental protection. However, lithium batteries are rarely seen in car batteries. why? First and foremost, safety. The reason why lithium batteries are not widely used in car batteries is safety, which is not unrelated to the characteristics of lithium batteries. It is known that the discharge temperature of lithium batteries is -20 degrees to 60 degrees, and the charging temperature is 0 degrees to 45 degrees, and bumps can easily cause fire and explosion. It can be said that lithium batteries are most afraid of high and low temperatures. Netizens who have opened the cover of the proposed engine know that the operating temperature of the proposed engine of the traditional fuel truck is very high, and it is necessary to maintain an optimal operating temperature. In order to maintain this scale, the engine The remaining heat is transferred to the proposed engine room and then to the outside of the car. At this time, the temperature of the proposed engine room can be imagined. What's more, many vehicles today are equipped with turbochargers, and turbocharging uses the proposed engine exhaust to drive, the temperature is generally 400-500 degrees, such a high temperature is undoubtedly a disaster for ordinary lithium batteries. In addition to temperature, knocking and kneading is also unacceptable for lithium batteries. We know that most of the car batteries are placed in the cabin of the car. If the lithium battery of the vehicle is in a traffic accident, the lithium battery is kneaded, and the result is likely to be a fire or explosion, causing secondary harm, or even It will become the first evil that endangers the members of the car. Secondly, function and cost. Generally speaking, the function of lithium battery is relatively good, why is its function discussed here? The homework is far less simple, let's do a brief calculation. The discharge power of lithium batteries at low temperatures is very low. Therefore, if you want to propose a vehicle, you need more than 5 times the usual battery pack to supply power. We use the 40 amp-hour battery commonly used for small cars to calculate, the leading brand Panasonic at work The capacity of Samsung's 18650 battery can reach 2900 mAh, and about 14 cells in parallel can reach the capacity of 40 ampere hours; on the other hand, if the voltage is to be increased to the level of the proposed battery, at least 4 more groups must be connected in series, namely 14*4 u003d56 cells. Let’s calculate with a high-capacity battery of 20 yuan. The lithium battery needs 1120 yuan. This cost is much higher than that of a lead-acid battery of 300 to 400 yuan. In addition, when the car is proposed, the battery needs to be discharged with a current of more than 100 ampere hours, so the battery must be at least 5C (5 times rate discharge) to be enough. This can be easily achieved by lead-acid batteries, unlike lithium batteries. Large currents will be straight. Affect the life of lithium batteries, increase the use of costs. In terms of repair rate, since the current production and use of lithium batteries only have a history of more than 20 years, there is still room for improvement in some planning and processes, which has also caused the repair rate of lithium batteries produced by many small and medium-sized domestic manufacturers to remain high. Condition: Lead-acid batteries have been opened for a hundred years, and the technology is relatively old and stable, and the application is more focused. Another point is that the lithium battery cannot be compensated by electric energy along with the power amplifier. Once the lithium battery of the power amplifier is compensated for electric energy, it is likely to spontaneously ignite or explode. This also greatly restricts its use in cars. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What should I pay attention to when buying lithium battery products?