OpeningYour battery pack design is only as reliable as the spring that carries the current. We make battery contact springs exactly to your drawing. Every coil is verified before shipment. No guesswor
Your battery pack design is only as reliable as the spring that carries the current. We make battery contact springs exactly to your drawing. Every coil is verified before shipment. No guesswork, no tolerance surprises.
We are BQUQ, a precision manufacturing factory in Dongguan, China. We have run CNC, stamping, spring, and heat sink lines for 20 years. Your drawings go straight to the shop floor, not through a sales desk.
At a glance: Tolerance ±0.02 mm on wire diameter, ±0.05 mm on free length. Lead time 5–7 working days for prototypes, 10–15 days for production. No MOQ. Full material certification with every batch.
| Parameter | Value |
|---|---|
| Materials | Spring steel (SWP-A, SWP-B), stainless steel (SUS302, SUS304, SUS316), beryllium copper (C17200), phosphor bronze (C5210) |
| Wire diameter | 0.05 mm – 8.0 mm |
| Coil diameter | 0.5 mm – 60 mm |
| Free length | 1.0 mm – 200 mm |
| Tolerance (wire dia.) | ±0.02 mm |
| Tolerance (free length) | ±0.05 mm |
| Surface finish | Zinc plating, nickel plating, gold plating, passivation, or as-drawn |
| Process | Automatic CNC coiling, compression, extension, torsion, and forming |
| Batch size | 1 piece to 1,000,000 pieces, no minimum order |
| Inspection | 100% dimensional check on critical coils, load testing per batch |
| Certifications | ISO 9001:2015, IATF 16949 (automotive), RoHS, REACH |
We use Japanese and German coiling machines. This gives us repeatable geometry across high volumes. For load requirements, we test each batch on a digital force tester. You get actual data, not a promise.
1. Batch-traceable quality. Every spring gets a heat number and production date code. If a field failure occurs, we trace the exact wire lot, machine, and operator within one hour. You know exactly what you installed. This is standard for us, not a premium service.
2. Inspection report per batch. You receive a dimensional report and a load-deflection curve for every batch we ship. The report covers wire diameter, free length, solid height, and load at specified deflection. No extra charge. No request needed. It is attached to your packing list automatically.
3. One factory for CNC, stamping, springs, and heat sinks. Your battery contact spring often sits next to a stamped bracket, a CNC-machined terminal, or a heat sink. Send us the whole assembly drawing. We make all parts under one roof. You cut logistics, avoid tolerance stack-up between vendors, and get one responsible party for quality.
Custom battery contact springs from our shop go into demanding environments. Common applications include:
In each case, the spring must hold a stable contact force over thousands of cycles. Our material selection and heat treatment ensure low relaxation. You get consistent electrical contact, even at elevated temperatures.
Looking for a different part? We also machine Custom Wire Form Springs Made in China | Precision Manufacturing No MOQ in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We make one prototype for you to test, or one million for production. The unit price drops with volume, but we never turn away a single-piece sample order.
Q: How do you guarantee tolerance and quality? A: We inspect every coil dimensionally. For load-critical springs, we test a sample from each batch on a force tester. The inspection report is included with your shipment. If a batch fails, we re-run it at our cost.
Q: What is your lead time? A: Prototypes ship in 5–7 working days after drawing approval. Production orders take 10–15 working days, depending on surface treatment. Urgent orders can be expedited to 3 days for simple compression springs.
Q: Can you provide material certificates? A: Yes. Every batch ships with a mill certificate for the wire material, plus our own test report. For automotive or medical applications, we provide full traceability documentation.
Stop comparing quotes from middlemen. Send your drawing directly to the factory floor. Get a firm quote in 12 hours, not a vague estimate.
Email your PDF or STEP file to sc@bquq.com. Or message us on WhatsApp at +86 13713157787. We reply within one business hour during China working time (GMT+8).
Your drawing is safe with us. We sign NDAs on request. Precision manufacturing, made in China, with no MOQ and real engineering support. Let us quote your next battery contact spring.
| Parameter | Capability |
|---|---|
| Materials | SUS302/304/316, SWC piano wire, SWP music wire, 65Mn, phosphor bronze, beryllium copper |
| Types | Compression, extension, torsion, wire forms, battery springs, touch springs |
| Wire Diameter | 0.05 - 12.0 mm |
| Tolerance | ±0.02mm standard, ±0.01mm on request |
| Surface | Zinc plating, nickel, black oxide, passivation, shot peening |
| Machines | CNC spring coiling machines, torsion machines, wire forming machines |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Load test per batch, fatigue test data on request |
