This article provides equipment for the Cool Co-op platform WeChat public number military brother outdoor original. Responsible editor: equipped cool Kel
With the continuous development of outdoor lighting products, 18650 rechargeable batteries are increasingly used in outdoor lighting applications. The 18650 battery brings great convenience to our outdoor lighting. But at present, the shoddy 18650 battery has a large number of hidden safety hazards. In order to ensure the reliability of the 18650 battery charge and discharge and the safety of outdoor lighting, please purchase the regular professional brand 18650 battery.
18650 battery brief description:
The 18650 battery is a battery model standard developed by SONY Corporation in the early days of the island. The 18650 is an appearance specification of this round battery: 18 indicates that the battery diameter is 18 mm; 65 indicates that the battery length is 65 mm. 0 indicates that the battery is cylindrical.
Note: Under normal circumstances, the length of the 18650 battery with a protective circuit installed on the upper side of the battery anode is generally about 69mm.
At present, 18650 battery specifications are mostly lithium-ion batteries. The nominal voltage of a single cell is generally 3.6V - 3.7V. Due to its high capacity density, no memory effect, long cycling charge and discharge life, etc., the 18650 battery is now widely used in various fields and goes deep into all of our favorite outdoor sports. Currently, some professional outdoor lighting brands have 18650 batteries. Highlight flashlights, camp lights and headlights. The battery packs on most laptops we use every day are also using 18650 batteries.
The power battery on the famous Tesla electric car is made up of more than 7 thousand 18650 batteries.
18650 battery structure:
1, a regular 18650 battery first tube is steel.
When the 18650 battery is overcharged and over-discharged, it will generate heat and the internal pressure of the battery will suddenly increase. When the pressure exceeds the battery withstand pressure, it may explode. Also, the battery is very likely to explode due to high battery short circuit temperature, strong external force, and impact damage. Therefore, the steel tube can play a very good protective effect.
2. Safety relief valve and safety vent are installed at the positive position. It is used to quickly discharge the pressure gas generated by overheating inside the discharge battery to avoid the risk of the battery exploding due to pressure expansion.
3. Once the battery overheats and the pressure suddenly increases, the pressure gas produced is discharged to the outside through the safety relief valve. The chemical substances in the gas react chemically with the oxygen in the air, and the combustion may occur. To prevent the battery from overheating. Therefore, a protective circuit board will be added to the regular 18650 battery. Overcharge, overdischarge, overheating, short circuit protection, and reverse polarity protection circuit boards are the key to the safe use of the 18650 battery.
Protective circuit board mounted on a single 18650 battery
18650 battery safety:
To be sure, the 18650 battery technology is very mature, as long as the battery itself is not a problem, as long as the quality of the battery circuit board is no problem, safety is fully guaranteed. We have all seen above that the 18650 battery itself has multiple protection systems. Therefore, we do not need to talk about tiger discoloration on the 18650 battery.
However, 18650 batteries without functional protection circuits such as overcharge protection have great security risks. Friends should pay high attention to them. The military brother is by no means an alarmist for making gimmicks.
Three without 18650 battery
The following figure shows the violent dismantling of the 18650 battery after the full discharge of the military brother (not to imitate dismantling). We can see that this 18650 battery has only vent holes and no package protection circuit board. If we use such 18650 batteries for overcharging, overdischarging, overheating or strong external impact, safety in use is not guaranteed. .
As long as you purchase the regular brand 18650 battery and use the 18650 battery correctly, safety can be guaranteed.
How to buy 18650 battery
At present, the 18650 battery market is full of fish, a large number of "three no" products flood the market, there are many unqualified businessmen will not sell the disassemble battery protection circuit, even if some ultra-low-priced 18650 battery marked the protection circuit is also used a poor protection circuit board. These will give everyone a very serious security risk with 18650 batteries.
The figure below shows the 18650 battery with no protection circuit
Buy 18650 battery to buy a clear brand identity, with overcharge protection, over discharge protection, short circuit protection and overheat protection of the regular brand 18650 battery. Do not buy low-quality, low-quality 18650 battery.
When choosing the 18650 charger, you must also choose the regular charger that matches the brand battery. The regular charger has a smart constant current charging function that can extend the battery life, as well as overcharge and overheat protection functions. The poor quality 18650 battery charger not only does not guarantee battery charging safety, but also greatly reduces the service life of the 18650 battery.
friendly reminder:
1, the use of regular professional brand 18650 battery and the corresponding supporting charger.
2. Use 18650 batteries as much as possible on lighting fixtures for professional outdoor lighting brands.
3, 18650 battery Please put in a place where no flammable items are charged.
4, found that the battery leakage and deformation to stop using and discard.
5, to avoid the new and old batteries and different brands of batteries together.
6, do not throw the battery into the fire.
7. Charge the battery once after the battery has been placed for more than three months.
8, the vast majority of charging treasure (mobile power) is 18650 battery pack, please buy regular brand.
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