1 cell 21700 lithium battery holder SMT surface mount type

Product Name: 1-cell 21700 Lithium Battery Holder (SMT Surface Mount Type)

Appearance and Structural Features:
Overall Structure: This is a single-cell battery holder designed specifically for surface mount technology (SMT), designed to accommodate a 21700 cylindrical lithium battery. It features an open frame design without traditional side walls, which greatly reduces weight and saves space while allowing for air circulation and heat dissipation.

Materials and Manufacturing Process:
Shell: The main body is made of black heat-resistant nylon material (specification: Heat Resistance Nylon 25% G/F), which offers excellent heat resistance (heat distortion temperature up to 235°C) and mechanical strength, making it highly suitable for reflow soldering processes.
Contacts: Both ends are equipped with nickel-plated spring steel contacts (Contacts: 0.3mm Spring Steel Temper, Nickel Plated). One end is a flat tab (positive terminal), and the other end is a helical spring or tab structure (negative terminal), ensuring good contact even in vibrating environments.

Functional Design (Key Features):
SMT Surface Mount Terminals: Unlike traditional wire connections, this battery holder has flat metal solder tabs extending from both sides. These tabs can be directly soldered to the pads on a printed circuit board (PCB), making it suitable for automated mass production.
PCB Layout Compatibility: Detailed PCB Layout dimensions (length, width spacing, etc.) are provided in the drawings, making it easy for engineers to design the circuit board directly.
Mounting Holes: The plastic frame has pre-drilled positioning holes with a diameter of approximately 1.5mm, which can be used for fixation or additional reinforcement during the production process.
Polarity Indication: The plastic housing usually has embossed positive and negative polarity symbols (+/-) to prevent incorrect assembly.
Dimension Specifications (Based on Drawing Markings):
Total Length (including terminals): Approximately 92.6mm
Body Length: Approximately 82.5mm
Width: Approximately 25mm
Height: Approximately 15.6mm

Electrical and Environmental Characteristics:
Heat Resistance: Can withstand high temperatures in lead-free reflow soldering processes (-40°C to 235°C).
Flammability: Meets UL94V-0 flame retardant rating for high safety.
Environmental Compliance: Complies with RoHS standards.