Application scenario
The road lighting battery system is designed for outdoor scenarios such as mobile lighting and emergency street lamps, offering 18650 battery packs, LED power display, and portable charging solutions.
Outdoor mobile lighting requires lightweight design, long battery life, and intuitive power feedback, with 7.4V 18650 battery packs being a common choice.
The solution integrates LED power display, overcharge and over-discharge protection, and a compatible charger, suitable for road construction, emergency lighting, and inspection operations.
The following case study illustrates typical cell specifications, protection parameters, and structural design considerations.
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Related case materials
Lighting Battery Design Solution
2020-04-071. Product Functional Parameters: 1) Lithium battery pack model design requirements: 18650-2S/6.8Ah/7.4V/50.32Wh. 1. Input characteristics: Designed with a compatible charger for charging the lithium battery pack.
1. Product Functional Parameters
1) Lithium battery pack model design requirements: 18650-2S/6.8Ah/7.4V/50.32Wh.
1. Input characteristics: Designed with a compatible charger for charging the lithium battery pack.
3) Power display: When the mobile lighting is turned on, the power display switch button can show the current battery level in real time.
1. Single-cell overcharge protection voltage: 4.3 ± 0.05V
2. Single-cell overcharge recovery voltage: 4.10 ± 0.05V
5. Combined battery overcurrent protection value: ~
6. Power display design scheme:
LED Display
Capacity ratio / LED4
Charging / 0%~20%
Flashing
21%~40%
80%~100%
Steady on
≥50mA
40%~21%
20 /
≤6.2V
5) Battery cycle life design requirements: 300~500 cycles (national standard charge/discharge standard)
1) Power display module: Uses microcontroller software to control LED lighting patterns to reflect the current battery level, making it intuitive and convenient.
3) Protection IC: The main protection function chip in the design scheme, providing real-time online monitoring of overcharge, over-discharge, overcurrent, and short circuit conditions to ensure the battery operates safely, stably, and efficiently.
5) MOSFET: MOSFET transistor acts as a switch in the protection circuit.
7) Battery casing: The overall appearance adopts a high-end rubber paint finish, forming the complete battery model.
3. PCM Schematic Diagram and Physical Images:
3. Product Structure Composition and Implementation
Road Lighting Batteries
Lighting Battery Design Solution
18650 Lithium Battery
Outdoor Lighting Battery