Current status of 18650 lithium ion battery 3.7v protection board technology, 18650 lithium ion battery 3.7v protection board design matters

　　Current status of 18650 lithium ion battery 3.7v protection board technology, 18650 lithium ion battery 3.7v protection board design matters. Because the parameters of lithium batteries are different, the corresponding types of protective plates are also different. Generally speaking, lithium batteries generally have a corresponding 18650 lithium ion battery 3.7v protection board to assist in their work. Therefore, the parameter requirements for 18650 lithium ion battery 3.7v protection boards are also extremely precise.

　　Current status of 18650 lithium ion battery 3.7v protection board technology

　　With the development of modern technology and the progress of modern industrialization, the technological development of 18650 lithium ion battery 3.7v PACK has become more and more mature. This is due to the low entry barrier of 18650 lithium ion battery 3.7v protection board.

　　Strictly speaking, to produce 18650 lithium ion battery 3.7v protection boards, manufacturers must have sufficient production equipment, inspection and testing, verify product functions, and simulate working environments to ensure the function of the protection boards. However, some manufacturers now do not need to have these complete production equipment to produce protective boards.

　　At present, the 18650 lithium ion battery 3.7v and its application industry has marginalized protective board technology. Taking 18650 lithium ion battery 3.7v electric bicycles as an example, electric bicycles are usually divided into three parts: motor, controller and power battery. The vehicle manufacturer hands over the purchase of the protective plate to the battery cell factory. The protective plate is just an accessory of the 18650 lithium ion battery 3.7v, and the battery cell factory belongs to the electrochemical industry. The factory's equipment and technical personnel are all configured in accordance with the requirements of the electrochemical industry. Yes, although some battery cell factories have also deployed PACK technical personnel, they are only responsible for purchasing protective boards, and the battery cell factories do not have the ability to design protective boards.

　　Therefore, the 18650 lithium ion battery 3.7v protection board not only protects the 18650 lithium ion battery 3.7v cells, but also serves as an adapter between the 18650 lithium ion battery 3.7v cells and the load. 18650 lithium ion battery 3.7v protection board manufacturers should serve as a bridge between battery cell factories and vehicle manufacturers.

　　18650 lithium ion battery 3.7v protection board design considerations

　　There are two design methods for 18650 lithium ion battery 3.7v protection boards, namely positive plate and negative plate. The principle and purpose are the same. Because the 18650 lithium ion battery 3.7v protection board is directly connected to the power supply, when some devices are started, the main path of the 18650 lithium ion battery 3.7v protection circuit passes through The larger current will have a big impact on the circuit. If some wiring designs are weak, there will be a risk of burning out the circuit board.

　　The number of single-cell 18650 lithium ion battery 3.7v protection chips is determined based on the number of cells in the 18650 lithium ion battery 3.7v pack, and they are used in series to protect the corresponding single-cell 18650 lithium ion battery 3.7v from the charge and discharge, overcurrent, and short-circuit conditions. While charging protection, the system uses the protection chip to control the on and off of the shunt discharge branch switching device to achieve balanced charging. This solution is different from the traditional approach of achieving balanced charging at the charger end and reduces the design of 18650 lithium ion battery 3.7v pack chargers. Application cost.

　　As the country vigorously develops new energy, many companies use lithium batteries to replace original lead-acid batteries, nickel-metal hydride batteries, etc. Due to the activity of lithium ions, 18650 lithium ion battery 3.7v protection boards must be added to prevent lithium batteries from overheating. Charge and discharge.

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