SY3500 5V 1A Lithium Battery Charger & Discharger Module

The SY3500 5V 1A Lithium Battery Charger/Discharger Module Output is designed to charge a single lithium-ion battery or multiple batteries in parallel. Its charging port can draw power directly from a USB source, making it ideal for compact power solutions.

Charging and discharging involve chemical reactions, but lithium-ion batteries are unique in their behavior. Energy flows into and out of the battery due to ion movement between the anode and cathode. However, battery capacity gradually decreases over time as ions become trapped in the structure, along with internal corrosion and side reactions affecting the electrolyte and electrodes.

Lithium-ion batteries operate safely within their specified voltage range. Applying voltage above the recommended level can compromise stability. Prolonged charging above 4.3V for cells designed for 4.2V can form metallic lithium on the anode. This causes cathode materials to oxidize, produces CO₂ gas, and increases cell pressure. If charging continues, the built-in CID (Current Interrupt Device) cuts off current at 1,000–1,380 kPa (145–200 psi).

Unlike lead-acid batteries, lithium-ion cells do not require full saturation charging, which is advantageous for renewable energy storage systems such as solar panels or wind turbines. This also simplifies charger design, as balancing circuits are generally unnecessary.

The SY3500 Lithium Battery Charger/Discharger Module for Power Bank Construction operates with a 5V input at 1A, 5V output, 500–800 mA charge current, and 1A discharge current. It is designed for high-capacity cylindrical lithium-ion batteries, featuring intelligent control to prevent overcharge and overdischarge, as well as short-circuit protection.

This 5V 1A Lithium Battery Charger/Discharger Module is fully compatible with 18650 batteries, including flat-top cells with a voltage range of 3.2–4.2V, providing safe and stable operation throughout charge-discharge cycles. The 18650 Battery Charger Module with Intelligent Control ensures optimal battery lifespan and reliable performance under various conditions.

Compact and user-friendly, the Lithium Battery Charger/Discharger Management Module is suitable for DIY projects, renewable energy systems, and other electronic applications. Its intelligent current and voltage management prolong battery life and optimize performance, allowing safe and efficient charging without risk of overcharge or overdischarge.

The SY3500 Module is a complete lithium battery charge and discharge management solution, combining smart control, protective circuits, and robust design to ensure battery safety, stability, and longevity, while enabling easy installation in a wide range of projects.

Applications of the SY3500 Module

1. Safe charging and discharging of 18650 lithium-ion batteries in home and industrial electronic projects.
2. Use in small solar energy storage systems and wind turbines for continuous power supply.
3. Powering emergency lights and home power banks with intelligent charge and discharge control.
4. Integration in robots and portable electronic devices with rechargeable batteries.
5. Managing lithium-ion batteries in smart devices and digital tools with safe voltage and current control.

Specifications of the SY3500 5V 1A Lithium Battery Charger Discharger Module

1. Input Voltage: 5V, 1A
2. Output Voltage: 5V
3. Charge Current: 500–800 mA
4. Discharge Current: 1A
5. Compatible Battery Type: High-capacity cylindrical lithium-ion batteries
6. 18650 Battery Voltage Range: 3.2–4.2V
7. Intelligent Overcharge Protection: Yes
8. Intelligent Overdischarge Protection: Yes
9. Short-Circuit Protection Circuit: Yes
10. Supports Charging Single or Multiple Batteries in Parallel
11. Can Draw Power from USB Port for Charging
12. Charging Process Can Be Intermittent without Saturation
13. Suitable for Renewable Energy Storage Systems such as Solar Panels and Small Wind Turbines
14. No Balancing Required Unlike Lead-Acid Batteries
15. Compact Design, Easy to Install in Home and Industrial Projects
16. Cell Pressure Protection: Activates at 1,000–1,380 kPa (145–200 psi)

Features of the Lithium Battery Charger and Discharger

1. Intelligent control to prevent overcharge and overdischarge of batteries
2. Short-circuit protection circuit to enhance safety and prevent battery damage
3. Supports charging a single battery or multiple batteries in parallel, drawing power from a USB port
4. Suitable for renewable energy storage systems, including solar panels and wind turbines