What is a 18650 lithium battery 2600mah? How to connect the 18650 lithium battery 2600mah protection board

　　What is a 18650 lithium battery 2600mah? 18650 lithium battery 2600mah protection board wiring method. As far as the battery market is concerned, the emergence of lithium batteries has solved the problems of traditional lead-acid batteries with short lifespan, incomplete charging and discharging, memory effect, and heavy metal pollution. Lithium batteries are widely used in various equipment for storage. In terms of energy fields, it is relatively wide, including UPS, intelligent robots, office supplies, batteries, base stations, towers and other products. A friend asked the editor what a 18650 lithium battery 2600mah is and how to connect the lithium battery protection board. Let me introduce it to you below.

　　What is a 18650 lithium battery 2600mah?

　　18650 lithium battery 2600mah generally refers to a 37V lithium cobalt oxide 10-cell battery pack, or a 38.4V twelve-cell lithium iron phosphate battery pack.

　　We know that the single voltage of lead-acid batteries is 2V, and in the case of eighteen strings, it is 36V. Most of the batteries used in the early days were lead-acid batteries, and 36V lead-acid batteries are widely used in all walks of life, including many portable Electronic products also use 36V voltage. Some electric bicycles in use now use 36V lead-acid batteries.

　　When various portable electronic products are upgraded to use lighter and longer-life lithium batteries, it is customary to call this lithium battery also a 18650 lithium battery 2600mah. Whether it is a 3.7V lithium cobalt oxide battery or a 3.2V lithium iron phosphate battery, they cannot be combined exactly into 36V, only 37V or 38.4V. Our portable electronic products are all used with wide voltages. For example, most electronic products that use 36V can actually use 30-45V. Therefore, either 37V lithium cobalt oxide battery or 38.4V lithium iron phosphate battery can be fully suitable for most 36V electronic products and 36V electric bicycles.

　　The composition and main functions of lithium battery protection board

　　The reason why lithium battery protection is needed is determined by its own characteristics. Since the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short-circuited, or charged and discharged at ultra-high temperatures, the lithium battery components will always appear with a delicate protective board and a current fuse. The protection function of lithium batteries is usually completed by the protection circuit board and PTC. The protection board is composed of electronic circuits. It accurately monitors the voltage of the battery core and the current of the charging and returning circuit in an environment of -40°C to +85°C. Controls the on and off of the current loop; PTC prevents severe damage to the battery in high temperature environments.

　　It is generally required that the Control (IC) detects and controls the cell voltage and the current and voltage of the charge and discharge circuit at -25°C ~ 85°C. Under normal circumstances, the C-MOS switch is turned on to protect the cell and lithium battery circuit. The board is in normal working condition, and when the cell voltage or the operating current in the circuit exceeds the preset value of the comparison circuit in the control IC, the CMOS will be turned off within 15 to 30ms, that is, the cell discharge or charging circuit will be closed to ensure Safety of users and batteries.

　　Lithium battery protection board connection method

　　There are two design methods for lithium battery protection plates, namely positive plate and negative plate. The principle and purpose are the same. However, the device does not support modifying the settings of the positive and negative protective plates through software, so it can only be done through physically correct connection to determine the protection method, and the software used is also different. The following describes the connection methods and operation methods of the two protection boards.

　　During the process, there are many connection methods when the battery protection board is tested on non-standard battery equipment. It is also worth getting familiar with the test connection. The simple process is as follows:

　　1. Place the device on a relatively horizontal table and adjust the stability of the device to make it stable;

　　2. Ensure that the humidity of the environment in which the equipment is used is within the range of 30~50%. If the humidity is too high, it is easy to cause leakage of the chassis and electric shock accidents;

　　3. Connect to the appropriate power supply (AC220V/0.1A), turn on the power button of the main device, and turn on the respective power module buttons;

　　4. Check whether the device can display and test normally.

　　18650 lithium battery 2600mah protection board wiring method

　　The third wire of some lithium-ion batteries is a temperature protection wire, and some are battery information verification wires (for example, if a non-original battery is replaced, an alarm will be prompted). Lithium-ion batteries are both batteries + protection boards. The 3 wires will only appear on the protection board, and the battery will always only have 2 wires. There are two types of lithium-ion batteries. Obviously the 3.7V one is non-aluminum iron phosphate and can be replaced directly.

　　1. Remove the packaging of the original battery, and then use a soldering iron to separate the protective plate and battery.

　　2. Similarly, remove the protective plate of your new battery and connect the battery to the old protective plate. (Pay attention to the positive and negative poles)

　　The purpose of the lithium battery protection board is to protect the battery from overcharging and over-discharging, prevent large currents from damaging the battery, and balance the battery voltage when fully charged. For the life of the battery pack, it is recommended that the battery charging voltage should not exceed 3.6v at any time.

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