Lithium-ion Battery Charger Product Design
Mar 10, 2026| The structural design of lithium-ion battery chargers prioritizes heat dissipation and safety.
The casing is commonly made of aluminum alloy profiles, with some products equipped with shock-absorbing sleeves for enhanced impact resistance. Output cables utilize the new national standard terminals, and the positive terminal employs an independent cavity design to eliminate safety hazards caused by incompatibility. Some models feature bend-resistant protection for the output cables. For heat dissipation, internal cooling fans are commonly included, and the PCBA module is encapsulated or injected with adhesive for reinforcement and heat dissipation. Heat-generating components are equipped with metal heat sinks.
High-efficiency, high-power-density designs often employ a PFC+LLC architecture or an LLC architecture. Specific controllers include the STMicroelectronics L6562A PFC controller paired with the L6599A LLC controller, or the MPS HR1000A LLC controller. Control and protection circuits use an MCU for charging control, operational amplifiers for signal amplification or feedback, and short-circuit protection components are included. Key components include high-voltage filter capacitors, rectifier bridges, switching transistors, and synchronous rectification controllers.
For applications such as electric bicycles, product design must comply with safety standards such as GB 42296-2022, involving "interoperable and collaborative" communication interfaces and overall security protection.