Solar Street Light Power Supply Design

Design

1. Design requirements of lithium battery for solar street light:

1) Design requirements for lithium battery pack model: 14.8V84AH.

2) The outlet port is on the top, the length of the cable is 12cm, the thickness: 2 square meters, the protection plate: 15A

3) Basic characteristics of the protection board

1. Single overvoltage protection value: 3.7V

2. Overvoltage release value: 3.65V

3. Single under-voltage protection value: 2.5V

4. Undervoltage release value: 2.7V

5. Instantaneous discharge current: 100A

6. The finished battery has short circuit and reverse charge protection.

4) Design requirements for battery cycle life: 5000 times (national standard charge and discharge standard)

5) Design requirements for battery dimensions:

2. Design scheme of lithium battery for solar street light:

1) Size: length: 530mm-width: 145mm-height: 100mm

2) Shell: aluminum shell

3) Protection board (BMS): It is mainly a protection circuit designed for the rechargeable lithium battery pack. Due to the chemical characteristics of the lithium battery itself, it needs to provide intelligent power calculation, overcharge, overdischarge, short circuit, overcurrent and other protection functions. To avoid fire, explosion and other hazards.

4) Lithium iron phosphate battery 3.7V Li-ion cell (Lishen 20 4S4P).

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