What brands are recommended for grading lithium batteries?

The brands recommended in the ranking are: BYD, Desai, Scud and Pinsheng.

1. BYD: When mentioning this brand, many people will think of the cars on the streets. In fact, BYD has a very high reputation in the electric vehicle field. A major characteristic is its independence. Developed lithium battery technology. Relying on advanced lithium battery technology, it is unrivaled in the energy vehicle market. In addition, it also supplies cell phone batteries to many domestic cell phone manufacturers such as Xiaomi, Lenovo, ZTE and Huawei. This is only recognized by these major manufacturers because of its superior strength in technology research and development. Not everyone can enter this industry. A large number of shipments can keep costs to a minimum, and the price-performance ratio is good. deserves to be recommended.

2. Desai: A lot of people don’t know about this brand. In the early years, feature phones were just being released, when landlines and cordless phones were still popular. wireless phones produced by Desai It accounts for half of the sales volume in the domestic market. Many companies and institutions use its telephones and answering machines. It relies on first-class battery technology to enable cordless phones to talk while walking around like cell phones. Nowadays, the main business is supplying batteries to different cell phone manufacturers. It still has some technical advantages, so you can pay more attention to it.

3. Scud: Friends who have replaced cell phone batteries should know this brand. This is a well-known domestic battery manufacturer. As long as it's a TVmobile phone on sale worldwide. You can basically find replacement batteries in its store. The quality/price ratio is always the same. Its batteries are sold on all major e-commerce platforms. The quality is relatively reliable and worth recommending.

4. Pinsheng: One of the earliest domestic manufacturers engaged in battery production. The replacement batteries produced also have good sales on e-commerce such as Taobao and JD.com. The technology is relatively advanced and the leather. is sustainable, we might as well find out more.

The pros and cons of BYD's use of lithium titanate batteries

AA batteries are the standard for dry cell batteries USA and AA batteries in mainland China. are compatible with its standard, so 5 AA batteries are also called AA batteries.

The AAA battery is an American dry battery standard. It is compatible with mainland China AA battery or Taiwan AA battery standard. This is a common battery and it is smaller than AA battery, so AA battery also called AAA battery.

AA battery model:

SC model is also not common. This is usually the battery cell in the battery. It can be seen on imported power tools, cameras and equipment. is standard. The SC (flat head) battery has a height of 42.0 ± 0.5 mm and a diameter of 22.1 ± 0.2 mm.

Model C is the AA battery and has many uses. The standard C battery (flat head) has a height of 49.5 ± 0.5 mm and a diameter of 25.3 ± 0.2 mm.

Model D is an AA battery, widely used in civil, military and special DC power supplies. The standard D cell (flat head) has a height of 59.0 ± 0.5 mm and a diameter of 32.3 ± 0.2. mm.

Model N is less common and has fewer uses. The batStandard N rie (flat head) has a height of 28.5 ± 0.5 mm and a diameter of 11.7 ± 0.2 mm.

Reference materials:

Advantages of lithium titanate:

1. Stress-free negative electrode, stable structure, can withstand large magnification and ultra-long life. service life (otherwise the negative electrode material itself will not become a defect affecting the service life)

2. The potential is high and the minimum potential is greater than the precipitation potential of lithium, so there is no need to do this. worry about the safety risks caused by lithium precipitation

4. It has a wide temperature range, especially good at low temperatures. temperature performance, which can bewind be -40℃.

Disadvantages of lithium titanate

1. The most fatal drawback is that it is expensive. Titanium dioxide and graphite, you can feel it. The battery price is more than 3 times more expensive than lithium iron + graphite.

2. It is a stress-free material and has a low compaction density. At the same time, the voltage is high, resulting in a low voltage platform for the entire battery. Ultimately, the energy density is too low. The corresponding energy density of lithium titanate + ternary is probably less than 100wh/kg, while the corresponding energy density of graphite + ternary can reach 200wh/kg. Lithium titanate + lithium iron and graphite + lithium iron

3, safety under the same energy density. To achieve the same energy density, the safety of high lithium titanate + nickel and graphite + iron-lithium ratio will be worse. Although lithium titanate lIf it is safe, the bottleneck will become something else (like the positive electrode)

4, producing gas. SEI film cannot form on the surface of lithium titanate. The electrolyte constantly reacts with the negative electrode, resulting in continuous gas production, which can only be slowed down but cannot be eliminated. This leads to two problems: a. It is not possible to create software packages. (Some people say Yinlong has soft bags. They did it just for energy density and already cut it out in later planning). b. Excessive gas production will affect life and safety. Although there are more than 20,000 cycles in the laboratory, no one dares to promise 20,000 times in batches (unless it is an excessive promise). Compared to iron-lithium from today's leading manufacturers, which can already promise tens of thousands of cycles, there is no advantage. A productionExcessive gas flow will affect the design of safety devices such as explosion-proof valves, potentially causing premature valve explosion or excessive valve pressure.

4. There is no obvious advantage in terms of magnification. At present, fast-charging lithium iron can already charge and discharge at 5-6°C, basically reaching the current level of lithium titanate batteries. The advantageous range of lithium titanate is 5-10°C, but at that time, heat, charger and positive electrode will become bottlenecks.

5. The (full) application space is small. Based on the above comparison of advantages and disadvantages, it can be seen that the obvious advantage of lithium titanate lies in its low temperature performance. However, in an environment with a temperature above -30°C, the overall performance (price + load capacity, qwhatever the energy density) have no advantage (or the price is high) compared with lithium iron + graphite + supplementary heater In. In addition, the energy densityThe disadvantage is that it is difficult to win in PK. This is one of the reasons for the recent poor performance of Yinlong market. It has advantages at temperatures around -40°C, but there are very few application scenarios. It can only have advantages in certain military-industrial scenarios in Northeast Siberia, and the overall market is not large.

In summary, the advantages and disadvantages of lithium titanate , it can be seen that lithium titanate is just a beautiful thing, with limited practical application scenarios and prospects. After all, when there is no obvious performance gap, price is king.