1. Unbranded lithium batteries are cheap and have great profit margins. New brands enter the market not only by technology, but also by price. No-name lithium batteries have almost no technical research, so low-cost competition has become their trump card. With exaggerated claims and unrealistic promises, these brands gained rapid acceptance by the aftermarket. Small brands in Anhui and Jiangxi often claimed that investment promotion would be successful and supply exceeded demand.
2. The brand model of the lithium battery industry is not obvious, and there are opportunities for off-brand products to take advantage. When it comes to lead-acid batteries, everyone knows Tianneng and Chaowei. In terms of lithium batteries for electric vehicles, apart from Phylion, which is selected by several major brandss, other brands of lithium batteries are unknown to industry players. Therefore, Brand In fact, these were only small workshops on the scale of village factories.
How many specifications are there for button cells?
150-350 yuan.
Chaowei lithium-ion battery not only has the characteristics of light weight, small size, high energy density, long cruising range and large charging energy. It can also realize the customized development needs of the electrical box to ensure the optimization of the overall vehicle layout.
Chaowei lithium-ion battery adopts flexible high-energy aluminum-plastic film packaging, and the energy density ofthe lithium-ion battery reaches 188 Wh/kg. At the same time, the lightweight design of the mechanism effectively improves the cruising range of the vehicle. Under NEDC operating conditions, the pure electric range reaches more than 200 km.
Precautions for using Chaowei batteries
When the electric vehicle is running, it is best to charge the battery after using about 80% of its power. Do not recharge after battery. is exhausted, if the battery is exhausted once, the power should be turned off, and do not use the "recovery voltage" of the battery to force driving to avoid the battery life is shortened due to excessive discharge.
If the battery has been continuously charged for more than 10 hours and the charger still does not change light or the battery becomes hot, charging should be stopped immediately and returned to after-sales service ofbattery. . It is strictly forbidden to charge the battery without changing the light.
There are two common types: rechargeable and non-rechargeable. Rechargeable batteries include 3.6V rechargeable lithium-ion button cells (LIR series) and 3V rechargeable lithium-ion button cells. Batteries (ML or VL series); non-rechargeable batteries include 3V lithium manganese button cells (CR series) and 1.5V alkaline zinc manganese button cells (LR and SR series).
Typically, the code name for coin cell batteries will have R, followed by a number. Some of these numbers directly represent the diameter and thickness of the battery, such as CR3032 for lithium battery buttons, which refers to a diameter of 30mm and a thickness of 32mm. Some of these numbers are special codes for diameter and thickness, such as LR41. , which refers to an alkaline battery - 7.9mm diameter and 3.6mm dThe thickness, SR43, refers to a silver oxide battery --- diameter 11.6 mm, thickness 4.2 mm.
The picture below shows several common button batteries:
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Classification of button batteries
1. Lithium battery
The common disposable lithium battery is lithium manganese battery (code C), rated voltage 3V.
Another type of disposable lithium battery, less common , is the lithium fluorocarbon battery (code B), with a rated voltage of 3V.
In addition, there is another commonly used secondary lithium battery, the ML lithium battery (name of code ML), with a nominal voltage of 3 V.
Lithium battery size numbers generally use the new IEC numbering method. The first two numbers are the diameter (unit: mm), the last two numbers are the thickness (unit: 0.1 mm), and the nearest number.is taken.
3. Silver Oxide
This button battery has the characteristics of long life and large capacity. It is widely used and has the largest application volume. This type of battery uses silver oxide as the positive electrode, zinc metal powder as the negative electrode, and the electrolyte is potassium hydroxide or sodium hydroxide. Electrical energy is generated by the chemical interaction of zinc and silver oxide.
The thickness (height) of silver oxide coin cell batteries is available in five specifications: 5.4mm, 4.2mm, 3.6mm, 2.6mm and 2 .1 mm, and its diameters are available in four specifications: 11.6 mm. , 9.5mm, 7.9mm and 6.8mm.
When choosing, you should choose one based on the size of its location. Its commonly used models include AG1, AG2, AG3, AG1O, AG13, SR626, etc. The AG model is the Japanese standard and the SR is the international standard model.nal.
4. Silver peroxide
The structure of this battery is basically the same as that of a silver oxide button cell. The main difference lies in the anode (absorbing electrode) of the battery. is composed of silver peroxide.
5. Alkaline manganese
This battery has large capacity and excellent low temperature performance. The materials used are cheap and inexpensive, and it can meet the requirements of continuous discharge. major currents.
The disadvantage is that the energy density is not sufficient and the discharge voltage is not stable enough. The positive electrode of the alkaline manganese button cell is manganese dioxide, the negative electrode is zinc, and the electrolyte is potassium hydroxide. Its nominal voltage is 1.5 V.
6. Mercury
Also known as mercury battery, it has the characteristics of being able to be used under te conditionshigh temperature, capable of long-term storage, stable discharge voltage and good mechanical properties. But its low temperature characteristics are not good. The positive electrode of this battery is mercury, the negative electrode is zinc, and the electrolyte can be potassium hydroxide or sodium hydroxide. Its nominal voltage is 1.35V.
7. Lithium-ion
The rated voltage of the disposable lithium manganese coin cell battery is 3V, the termination voltage is 2V, and the typical operating current is 0.1-0.2 my. It uses manganese dioxide with very stable chemical properties as the positive electrode material and lithium metal with very high specific energy as the negative electrode material.
The average annual reduction in capacity does not exceed 2% and the storage life is long. The battery adopts a semi-sealed structure and is safe to use. The adaptability rangeity to the temperature of disposable lithium manganese button batteries is wider from -20 to It can work normally under the conditions of +60 degrees Celsius.
It is mainly used in electronic dictionaries, motherboard CMOS batteries, watches, etc.
8. Secondary Lithium
This is a secondary button cell and a button cell that can be charged and discharged many times; rated voltage: 3.7V; charging voltage 4.2V; >
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The corresponding mark is visible on the back of the battery
LR---alkaline--1.5V
SR---oxide silver --1.55V
CR---lithium battery--3V
ZA---zinc air--1.4V
LIR- --secondary lithium Battery - 3.7V
9. Hammer button
This battery has the characteristics of high energy density, good storage performance, low self-discharge and long service life. The downside is that the internal resistance of the batteryis important. The positive electrode of the battery is made of manganese dioxide or iron disulfide as raw material, the negative electrode is a hammer, and the electrolyte is organic material.
The rated voltage of Li/MnO type hammer battery is 2.8V and the rated voltage of Li(CF)n type hammer battery is 3V.
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10. Battery with soldered pins
Battery with soldered pins, also known as battery with pins or battery with pins, is called battery with soldered battery in English; called pin battery in Taiwan and Hong Kong. This is a pin battery.
Usually small electronic devices, digital products, medical equipment, etc., button batteries used for energy storage need to be soldered on the printed circuit board (PCBA). The battery cells are made of stainless steel with nickel plating: the steel strip has uno hardness. Not easy to fold.
Nickel plating can firmly add tin to electronic components and prevent them from falling off easily. It is not possible to weld the battery and the steel strip directly. The solder is not strong, it falls off easily, and the contact area is small.
Reference materials:
Baidu encyclopedia button battery