Energy density of ternary lithium battery

Introduction Energy density of ternary lithium battery Energy density Regarding energy density, it is an indicator that affects the endurance performance of new energy vehicles. At this parameter, the energy density of lithium iron phosphate battery cells is only

Energy density of ternary lithium battery

Energy density Regarding energy density, it is an indicator that affects the endurance performance of new energy vehicles. In this parameter, the energy density of lithium iron phosphate battery cells is only about 110 Wh/kg, while ternary lithium battery cells are generally 200 Wh/kg. In other words, for batteries of the same weight, the energy density of ternary lithium batteries is 1.7 times that of lithium iron phosphate batteries, which can extend the life of batteries for energy vehicles. news. There is one thing about safe new energy vehicles that has car owners talking, and that is spontaneous combustion. There are many spontaneous combustion accidents in new energy vehicles every year. Ultimately, this is about battery stability. In this regard, lithium iron phosphate batteriescurrently have the most thermally stable power batteries and have absolute advantages over ternary lithium batteries in terms of safety. The electrical heating peak of lithium iron phosphate batteries reaches 350°C, and the chemical components inside the battery need to reach 500~600°C before starting to decompose. However, the thermal stability of ternary lithium batteries is very average and will start to decompose around 300°C. Efficiency by temperature difference Of course, although lithium iron phosphate batteries are resistant to high temperatures, ternary lithium batteries have better resistance to low temperatures. This is the main technical route for manufacturing low-temperature lithium batteries. At minus 20°C, ternary lithium batteries can release 70.14% of their capacity, while lithium iron phosphate batteries cannotrelease only 54.94% of their capacity. And because at low temperature, the discharge platform of ternary lithium batteries is much higher than the voltage platform of lithium iron phosphate batteries, the startup is faster. Charging efficiency: On the one hand, ternary lithium batteries are more efficient. Lithium batteries are charged using the current limiting and voltage limiting method, which is the first stage of constant current charging. At this point, the current is large and the efficiency is high. After the constant current reaches a certain voltage, it enters the second stage of constant voltage charging. At present, the current is small and the efficiency is low. Therefore, the charging efficiency of both is measured by the ratio of constant current charging capacity to the total capacity of the battery, called constant current ratio. The results experimentals show that there is little difference between the two when charging below 10°C, but the distance will increase when charging above 10°C. When charging at 20°C, the constant current ratio of the ternary lithium battery is 52.75%. and the constant current ratio of lithium iron phosphate battery is 10.08%, the former is 5 times that of the latter. Lifespan The lifespan of lithium iron phosphate batteries is better than that of ternary lithium batteries. The theoretical life of a ternary lithium battery is 2,000 cycles, but when it reaches 1,000 cycles, the capacity drops to 60%. Even Tesla, the best in the industry, can only retain 70% of its capacity after 3,000 cycles, while lithium iron phosphate batteries can still retain 80% of their capacity after the same cycle. Written at the end In comparison, lithium iron phosphate batteries are safe, have a long lifelong life and resistant to high temperatures; Ternary lithium batteries have the advantages of light weight, high charging efficiency and low temperature resistance. Therefore, the different adaptability of the two is the reason why the two males coexist.

74v240ah lithium battery multiplex

The energy density of lithium batteries currently used in electric vehicles by Pacific Automotive Network is approximately 100-150Wh/kg, is 2 times higher than that of lead-acid batteries is about 3 times higher, and the cycleability is much higher than that of lead-acid batteries, so lithium-ion batteries are currently the preferred battery for the development of electric vehicles.

Energy density refers to the energy released by the battery per unit of mass or per unit of volume. energy, that is, the specific energy of thevolume or mass-specific energy. Both energy density and power density are changing quantities. After the battery is used several times, the energy density will decrease (the battery capacity will attenuate) and the power density will also decrease, and these two quantities will also change with changes in the environment. For example, they will change (usually decrease) to some extent during extremely cold or hot seasons.

Currently, no battery has the energy density necessary to be practical enough to drive an electric vehicle with a range of several hundred kilometers. Improving battery energy density is also a top priority in current battery research and development. Assuming that safety is solved, if the battery energy density can reach 300~400 Wh/kg, it will have the capacity to compete with it. Traditional fuel-powered locomotives in terms of cruising range, but another well-known problem with batteries is their lifespan. Battery energy density will decrease with battery usage, and this decay is not linear, but can be. a sudden decrease. Therefore, when developing automotive batteries, circularity is also a decisive factor.

(Photo/Text/Photo: Pacific Automotive Network Gu_)

72V40Ah, the energy is 72*40=2880Wh. The current energy density of lithium batteries can reach 200Wh/Kg, which is already very impressive. Let's calculate based on 200, the weight should not be less than 2880/200=14.4 kg. Basically, the weight is not less than 15 kg. This is a lithium-ion battery made of ternary materials. If it is made of lithium iron phosphate material, it will be veryvery powerful if it can reach 130 Wh/Kg. The lithium iron phosphate battery is: 2880/130 = 22 kg. This is only the case for battery cells. If it is a module and BMS, structural parts, etc. are added, the weight will increase.

As for the price. Let's calculate the ternary battery at the cheapest price of 1.2 yuan/Wh. The price is 2,880 x 1.2 = 3,500 yuan. If it is a lithium iron phosphate battery, the price is nearly 6,000 yuan based on the cheapest price of 2 yuan/Wh.

The calculations above are all relatively conservative and the values ​​are relatively reliable.

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01