What are the important repair methods and common faults of lithium battery protection board

How to repair and repair the lithium battery protection board if it is broken? If the lithium battery protection board is broken, you can first charge it with a charger to see if the protection board can be activated. If it can't be charged, it must be broken. It may be that the electronic components are damaged, or it may be reset! However, if the protection board is broken, the measured value should be 0V. If you are in contact with the lithium battery protection board, you may wish to discuss why the lithium battery protection board has no charge and discharge protection. I hope to bring you some useful help. What happens when the lithium battery protection board has no charge and discharge protection? First look at the ternary parameters: the conventional is 2.8～4.25, and the iron-lithium is 2.5～3.65V1. It may be voltage overcharge, overdischarge, overcurrent, short circuit, and overtemperature. 2. Use a multimeter to check whether the charging and discharging MOS tube is turned on. 3. If the lithium battery protection board is equipped with LED, the LED flashes for 0.5 seconds if the lithium battery protection board cannot be charged or discharged. 4. If the lithium battery protection board is equipped with a host computer, it can be connected to the host computer Check the protection status 5. The lithium battery protection board is equipped with a weak point switch. Please check whether the weak point switch is turned on. If these conditions occur, you can check the following methods to repair: 1. Overcharge, overdischarge, overcurrent, short-circuit and plug in the charger to restore 2. Overcurrent What is the lithium battery protection board when the load is disconnected? The lithium battery protection board is a protection for the charging and discharging of the lithium battery pack in series; when fully charged, it can ensure that the voltage difference between the individual cells is less than the set value, and realize the equal charge of the individual cells of the battery pack, which effectively improves The charging effect under the series charging mode; at the same time, the overvoltage, undervoltage, overcurrent, short circuit, and overtemperature status of each single battery in the battery pack are detected to protect and extend the battery life; undervoltage protection makes each single battery in Prevent the battery from being damaged due to over-discharge during use. Principle of lithium battery protection board: The reason why lithium battery (rechargeable) needs to be protected is determined by its own characteristics. Because the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short-circuited, and ultra-high temperature charging and discharging, the lithium battery components will always appear with a delicate protection board and a current fuse. The protection function of lithium battery is usually completed by the protection circuit board and current devices such as PTC. The protection board is composed of electronic circuits, which can accurately monitor the voltage of the cell and the charging and discharging circuit at all times under the environment of -40℃ to +85℃. Current, timely control the on and off of the current loop; PTC prevents severe damage to the battery in high temperature environments. Ordinary lithium battery protection boards usually include control ICs, MOS switches, resistors, capacitors and auxiliary devices FUSE, PTC, NTC, ID, memory, etc. Among them, the control IC controls the MOS switch to turn on under all normal conditions to make the cell and the external circuit conduct, and when the cell voltage or loop current exceeds the specified value, it immediately controls the MOS switch to turn off to protect the cell’s Safety. What are the common faults of lithium battery protection board? 1. No display, low output voltage, no load 2. No charging 3. No internal resistance, large internal resistance Statement: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete the previous article : What is the general difference between lithium batteries and lead-acid batteries?