Pure cobalt battery life

The pure cobalt battery has a lifespan of approximately 330 times.

1. Pure lithium cobalt oxide battery is a type of polymer battery. Only the positive electrode material uses pure lithium cobalt oxide. Pure lithium cobalt oxide battery is a better material for polymer batteries. The lifespan is relatively longer.

2. Lithium polymer batteries use file alloy as the positive electrode, polymer conductive materials, polyacetylene, polyaniline or polyparaphenol as the negative electrode, and organic solvents as the electrolyte.

3. The specific energy of lithium polyaniline battery can reach 350W.h/kg, but the specific power is only 50-60W/kg, the operating temperature is -40-70 degrees, and the service life is from -40 to 70 degrees. about 330 times.

What is the relationship between lithium and cobalt oxide? And the goatsTHE ?

Approximately one year under normal circumstances.

Lithium battery life refers to the battery capacity which decreases to 70% of the rated capacity (battery capacity at 25°C ambient temperature, standard atmospheric pressure and discharged to 0.2 C) after being used. during a period considered to be the end of life. In the industry, lifespan is generally calculated based on the number of complete cycles and discharge of lithium batteries. During use, irreversible electrochemical reactions will occur inside the lithium battery, leading to a decrease in capacity, such as decomposition of electrolyte, deactivation of active materials, collapse of cell structures. positive and negative electrodes, resulting in a reduction in the number of lithium. intercalated and deintercalated ions, etc. Experiments have shown that higher discharge ratess will cause capacity to decline more quickly. If the discharge current is lower, the battery voltage will be close to the equilibrium voltage and more energy can be released.

The theoretical life of lithium batteries is about 800 cycles, which is average among commercial rechargeable lithium batteries. Lithium iron phosphate is about 2,000 times that, while lithium titanate is said to be capable of reaching 10,000 cycles. Currently, major battery manufacturers promise in the specifications of their ternary battery cells that they can be used more than 500 times (charging and discharging under standard conditions). However, once the cells are assembled into battery packs, due to consistency issues. The main issues are tension and internal content. The resistance cannot be exactly the same and its lifespan is approx.n 400 times. The manufacturer recommends that the SOC usage window be 10% to 90%. It is not recommended to carry out deep charging and discharging, otherwise it will cause irreversible damage to the positive and negative electrode structures of the battery if the calculation is based on surface charging. and shallow discharge, the lifespan will be at least 1000 times. Additionally, if lithium batteries are frequently discharged at high speeds and in high temperature environments, the battery life will be significantly reduced, up to less than 200 times.

In recent years, with the different new energy materials, the existing dynamometer batteries on the market are mainly divided into lithium iron phosphate batteries, ternary lithium batteries (including NCA and NCM), batteries lithium manganate, cobalt. Lithium acid battery, nickel metal hydride battery,lithium titanate battery, etc. Among them, lithium iron phosphate batteries are currently the most common battery type in China's electric vehicle market, but in recent years, the market growth rate has been significantly slower than that of ternary lithium batteries. According to statistics, from January to April 2016, China's lithium iron phosphate battery market shipments reached 2.6 GWh, an increase of more than 2 times over the previous year, accounting for 75.3% of the entire ternary system battery market; 771.51 MWh, the same as last year. Compared with the same period, the increase reached 3.47 times., its proportion in the overall market also increased to 22.6%, and it has gradually become a hot product in China's power battery market.

It depends on the quality and material of the battery. A good batterycan be charged and discharged nearly 2,000 times, and an average battery can be charged and discharged 500 to 800 times. the battery is defective, maybe two or three hundred times. Generally, materials such as ternary materials are fully charged at about 4.2 V, and the cut-off discharge voltage is about 2.8 V. The voltage of lithium iron phosphate is lower.

There are big differences between corporate production and laboratory research and development:

Laboratories generally have a ratio of 90:5:5 or 80 :10:10 (positive active material: Conductive agent: binder), weight ratio, LCO, LMO and LFP are all similar;

But the actual design of lithium battery companies is very different,< /p>

Generally speaking, LCO: 95:2:3, (positive active material: conductive agent: binder);

LMO: similar to above;

Ordinary lithium titanate batteries swell after about 1,500 to 2,000 cycles, making them unable to be used normally.

Advantages

It is a stress-free material with good cycle performance;

The discharge voltage is stable and the electrolyte does not does not decompose, thus improving safety. performance of lithium batteries;

Compared with carbon anode materials, lithium titanate has a high lithium ion diffusion coefficient (2*10-8 cm2/s) and can be charged and discharged at high rates;

Titanate The electrical potential of lithium is higher than that of pure lithium metal, and it is less likely to produce lithium dendrites, which provides a basis for ensuring the safety of batteries lithium.

Disadvantages

Specific capacityis much lower than that of other metal-based materials. The theoretical capacity is 175 mAh/g;

The conductivity is low and the bias of large current discharges is serious, so the performance is poor at high flow rates;

En As a battery material, its tap density is relatively low, unit volume capacity is smaller.

The number of cycles of a lithium-ion battery depends on which material of the positive and negative electrodes has the lowest number of cycles. If the positive electrode is lithium cobalt oxide and the negative electrode is lithium titanate, then the cycle will be 500 times. However, if the positive electrode is replaced with lithium iron phosphate, the cycle performance of lithium titanate can be fully utilized, reaching 2,000 or even 10,000 times.

Characteristics of lithium cobalt oxide batteries

1. Performancesuperior electrochemicals.

2. Excellent processing performance.

3. . Tap density Large, it helps to increase the specific capacity of the battery volume

4. Product performance is stable and consistent

Understand the advantages and disadvantages of lithium cobalt oxide batteries in one article.

Lithium cobalt oxide battery parameters

Standard continuous discharge current: 0.2C

Maximum continuous discharge current: 0.5C

In operationOperating temperature: Charge: 0~45℃

Discharge: -20~60℃

Product size: MAX15*29*51mm

Internal resistance of finished product: ≤180mΩ

Cable model: UL1571/26# national standard wire, wire length 100mm

Protection parameters: voltage overload protection voltage / each string 4.28 ± 0.025 V

Overcharge and discharge protection voltage 2.4 ± 0.1 V, surin valuevoltage: 3 ~ 7 A

Understand the advantages and disadvantages of lithium cobalt oxide batteries in this article

The advantages and disadvantages of lithium cobalt oxide lithium and cobalt batteries

Advantages

1. Stable structure

2. High capacity ratio

3. Excellent process performance