Lithium battery solution for outdoor advertising machine
Quotation: (lithium battery of outdoor advertising machine, 12V lithium battery) with the diversification of human communication channels, the new advertising communication mode of advertising machine is rapidly popularized: the advertising machine has penetrated into every corner of our life, and the existence of advertising machine can be seen at supermarkets, bank halls, railway station platforms and other places at any time.
Outdoor advertising machine is usually equipped with backup battery to meet its power supply requirements. The backup power supply of LCD advertising machine designed by our company adopts lithium-ion battery design scheme, which requires that the lithium battery can provide ultra long-term power supply requirements, and can meet the use of backup power supply of advertising machine in different occasions. The external design of backup power supply can fully meet the overall design of the product, and can achieve the battery at any time Installation and replacement.
Design requirements:
1、 Design requirements of lithium battery for advertising machine:
Due to the small working current of the advertising machine itself, but the required power supply time is too long, high-capacity battery cells are usually selected to form high-capacity finished batteries to meet the requirements of its power supply time, and high security is required. Therefore, Sanyo or LG18650 electric core combination is adopted as the standby power supply of LCD advertising machine.
1) Model design requirements of lithium battery pack: 18650-3s1p / 2.6ah/11.1v.
2) Circuit design requirements:
1. Single section overcharge protection voltage: 4.28 ± 0.25V
2. Single section overcharge recovery voltage: 4.15 ± 0.50v
3. Single section over discharge protection voltage: 3.00 ± 0.08v
4. Single overdischarge recovery voltage: 3.10 ± 0.10v
5. Overcurrent protection value of combined battery (10ms): 5 ~ 8A
6. Over temperature protection value of combined battery (recoverable): 70 ± 5 ℃
7. The finished battery shall have short-circuit and reverse charging protection functions.
3) Cycle life design requirements: 300 ~ 500 times (in line with the national standard of charging and discharging).
4) Design requirements for battery shape and size: refer to battery shell, which can be customized according to customer requirements.
2、 Design scheme of standby power supply for advertising machine:
1) Protection board (PCM): it is mainly a protection circuit designed for rechargeable lithium battery. Due to the chemical characteristics of lithium battery, it is necessary to provide intelligent power calculation, overcharge, overdischarge, short circuit, overcurrent and other protection functions to avoid combustion, explosion and other hazards.
2) Protection IC: the main protection function chip of the standby power supply design scheme, which monitors the on-line function of the electric core at all times, so that the electric core can work in a safe, stable and efficient range.
3) Temperature switch: mainly designed for temperature protection function. When the temperature of the battery itself reaches 70 ± 5 ℃ due to other abnormal problems, the temperature switch is started for temperature protection
4) 18650 lithium ion cell: ur18650 / 2600mAH / 11.1v Li ion cell (Sanyo).
5) MOSFET: MOSFET, which plays a switching role in the protection circuit. It will never increase or decrease the voltage at both ends of the load, so as to ensure the voltage stability.
6) Battery package: PVC film