How to calculate power battery compared to energy density

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

The energy of the battery: refers to the electrical energy outputted in the external power under certain discharge conditions; the energy given by the energy: unit weight or unit volume, the weight ratio energy or volume ratio energy is more energy than the weight of the energy lithium iron. The volume ratio energy is: pure electric vehicle battery: about 110Wh / kg; 210WH / L mixed electric vehicle battery: about 65WH / kg; 120WH / L battery pack usually refers to the battery core plus protective plate portion, the battery pack is usually Refers to the battery pack plus housing part. Comparison energy of battery packs: ratio energy than the battery core ratio energy: weight and volume with the outer casing and other accessories.

Compared to energy refers to the energy of unit weight or unit volume, the specific energy of the battery is the size of electrode materials that participate in the unit mass of the electrode reaction. What is the power battery compared to energy? How to calculate the battery compared to energy density, the ratio energy of the battery is the electrical energy that the battery unit quality or unit volume can be output, and the unit is W · h / kg or W · h / L. More energy than energy is more energy and actual points.

Theoretical than energy refers to the energy that can be output in theory when the 1kg battery reaction material is completely discharged. The actual energy that the actual than energy is 1kg battery reaction substance can be output. Commonly used energy to compare different battery series.

See Table 7-12 of the main battery. Table 7-12 What is the energy power battery compared to energy power battery compared to energy, how to calculate how the power battery is calculated due to various factors, the actual amount of battery is far less than theoretical than energy. The actual relationship between the actual energy and theoretical ratio is as follows: w = w care kvkrkm in KV-voltage efficiency (the ratio of the operating voltage of the battery and the electromotive force); KR-reaction efficiency (representing the utilization of active substance); km- There are some substances that do not participate in the streaming reactions but also the substances of these substances, which should reduce the proportion of these substances to improve the proportion of these substances to improve the proportion of active substances.

The ratio of both is quality efficiency. The ratio energy of the battery is a comprehensive indicator, which reflects the quality level of the battery, and also shows the technical and management level of manufacturers. Typically, manufacturers do not independently assess this indicator, but when assessing the level of batteries produced, this is often measured.

Dynamic batteries are compared to energy density to calculate the battery. It is considered to calculate the battery energy density. First, you must first understand the conventional types of common lithium batteries, and lithium batteries are mainly divided into two kinds.

1 kind of lithium battery: representatives of new energy (ATL batteries), Bangkai batteries, Bai Bik, Three and Chaoyang. The materials used in this lithium battery are typically three yuan, also known as lithium cobaltate, which is in the advantages of large capacity and high energy density, and the energy density of the ternary battery is about 580Wh / liter, cobalt. The working voltage of lithium sour is generally 2.

75V ~ 4.2V, like domestic new energy enterprises ATL is now doing a battery of the 4.35V voltage system, and the energy density can be as high as 650Wh / liter.

These batteries are generally used in smartphones, tablets, laptops, and Bluetooth headphones. The materials used in this lithium battery are typically three yuan, also known as lithium cobaltate, which is in the advantages of large capacity and high energy density, and the energy density of the ternary battery is about 580Wh / liter, cobalt. The working voltage of lithium sour is generally 2.

75V ~ 4.2V, like domestic new energy enterprises ATL is now doing a battery of the 4.35V voltage system, and the energy density can be as high as 650Wh / liter.

These batteries are generally used in smartphones, tablets, laptops, and Bluetooth headphones. There is a tangled that there are also many manufacturers in China to discharge the cells with a three-yuan material, such as battery companies such as ultraviolet, Tianneng, Foster, and electro-optic power supply, these batteries can be used in a wheelbarrow. Thinking car, electric motorcycle, its performance can meet the customer's product requirements, and by the majority of users.

The second phosphate battery: power battery companies represented by BYD, Watma, China Aviation Lithium Electric Battery Factory. The material used in this battery is lithium iron phosphate, referred to as iron battery, mainly known for safety and circulating life, and the operating voltage of the iron battery is generally 2.3V ~ 3.

65V, and the cycle life is as high as 2000 times, and better Power battery companies can extend battery operating voltages to between 2.0V ~ 3.3.

65V. This power battery is often used on electric bus, electric car, electric forklift, mobile station. The calculation method of battery core energy density is as follows: energy density (WH / l) = capacity×Platform voltage ÷ volume ÷ 1000 (converter) Iron battery platform voltage: 3.

2V; three-dimensional lithium platform voltage is generally 3.7V. Cylindrical volume = πr2×H; rectangular volume = long×width×High; power battery material, to satisfy high power, high energy, energy power.

The most important core raw material for the key is the key, the positive, negative electrode, diaphragm, electrolyte, etc., plus the amount of steps after the end of the vehicle is terminated on the vehicle, and the content of resource recycling. Positive material: It is mainly based on ternary material, especially with high nickel ternary materials.

Negative electrode material: How much or graphite material is now applied, like artificial graphite, natural graphite, and so on. Diaphragm: From the current and future, it is still based on the material of the polyolefin, whether it is polypropylene or polyethylene, there is a power battery. It is possible to be a trend of development.

For such a development trend and requirement of energy density, the diaphragm of the polyolefin is a hot spot and a hot spot of industrialization. Electrolytic solution: currently based on lithium hexafluorophosphate, now new electrolytes, like lithium fsi, lithium TFSI, currently in the form of additives in the form of additives.

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