What This Plate Does and Why It Matters for Your Battery Pack This is a stainless steel power spring contact stamped battery connector plate — a single-piece metal stamping that
BQUQ Stainless Steel Power Spring Contact Stamped Battery Connector Plate
What This Plate Does and Why It Matters for Your Battery Pack This is a stainless steel power spring contact stamped battery connector plate — a single-piece metal stamping that holds power spring c
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
What This Plate Does and Why It Matters for Your Battery Pack
This is a stainless steel power spring contact stamped battery connector plate — a single-piece metal stamping that holds power spring contacts in place while carrying current between cells in a battery pack. You get repeatable contact pressure and electrical continuity across thousands of cycles because we hold flatness to 0.02 mm and contact surface roughness to Ra 0.4 µm. Average lead time is 15 days after drawing approval, and parts come out at 42–48 HRC when we use hardened 301 stainless, so they resist deformation under constant spring load.
How We Eliminate Distortion in Thin-Gauge Spring Contact Plates
Thin stainless (0.15 mm to 0.8 mm) wants to warp during stamping and after heat treatment. We counter that with a two-step progressive die that does blanking, coining, and forming in one pass, then a secondary stress-relief anneal at 400°C for 2 hours. This keeps the contact fingers parallel to the base plate within 0.02 mm total runout — measured on a CMM, not a feeler gauge. For high-cycle battery applications, we can add a micro-shot peening step to close micro-cracks on the bend radius, which pushes fatigue life past 10,000 insertion cycles.
Materials and Heat Treatment We Use for Battery Connector Plates
We stock three grades for this part: 301 full-hard stainless (standard, 48 HRC), 304 annealed (for deep-drawn pockets, 20 HRC max), and 430 ferritic (for cost-sensitive consumer packs, 85 HRB). If you need a specific temper, we can order it — but 301 full-hard is the default because it gives the best spring-back repeatability at ±0.5° bend angle. For corrosion resistance in humid environments, we offer passivation to ASTM A967, which removes free iron and leaves a chrome oxide layer without changing dimensions.
Spec Table: Dimensional and Performance Limits for This Stamped Plate
Parameter
Value / Range
Notes
Material
301 SS (full-hard), 304, 430
ASTM A240 certified
Thickness
0.15 – 0.8 mm
±0.01 mm per sheet
Hardness
42–48 HRC (301)
Vickers 430–500 HV
Dimensional tolerance
±0.01 mm (critical), ±0.05 mm (general)
Per ISO 2768-mK
Surface finish (Ra)
0.4 µm (contact area), 0.8 µm (rest)
Measured per ASME B46.1
Flatness
0.02 mm max
On a 50 mm × 50 mm area
Runout (contact fingers)
0.02 mm total
Relative to base plane
Bend angle accuracy
±0.5°
Spring-back compensated in die
Lead time
12–15 days (tooled), 25 days (new die)
From drawing approval
MOQ
No MOQ for standard sizes
Sample orders accepted
Packaging
Anti-static trays, reel or tube
Per EIA-481 for SMT
Inspection Before Every Shipment: What We Measure and How
Every batch gets a First Article Inspection (FAI) with 15 points recorded — that includes contact force at 0.5 mm deflection, surface roughness on the mating face, and flatness on a granite table. In-process, we use a high-speed camera at 200 frames per second to catch burr formation on the blanking edge before it exceeds 0.03 mm. Final QC checks 5 pieces per lot for dimensional compliance and 100% of parts for visible cracks using a 10× loupe. If you request it, we include a CMM report with X-Y-Z coordinates for all critical features — that report is free with orders over 5,000 pieces.
How This Plate Interacts with Your Spring Contact and Battery Cell
The plate’s stamped pockets are designed to nest a power spring contact with a press-fit retention force of 5–8 N, so the contact doesn’t shift during vibration (we test to 10 G RMS from 10–2000 Hz). The base plate thickness determines the current-carrying cross-section — for a 10 A continuous load, use 0.3 mm or thicker in 301 SS. If you’re pairing this with a nickel-plated contact, our passivation step keeps the stainless surface passive, preventing galvanic corrosion at the junction. We also add a laser-etched part number and batch code on the non-contact side — that costs nothing extra and helps you trace failures to a specific heat lot.
Tooling Options for Your Battery Connector Plate — Progressive Die or Multi-Slide
For high volume (over 100,000 parts), we use a progressive die with 16 stations — that includes pilot holes, coining, forming, and cut-off. This gives you a part cost of $0.03–$0.08 depending on thickness and finish. For medium runs (5,000–50,000), we use a multi-slide former that eliminates the carrier strip, reducing material waste by 15% compared to a progressive die. We keep 12 standard die sets for common battery sizes (18650, 21700, 26650) — if your part fits one of those, tooling cost is zero and lead time drops to 7 days. For custom shapes, a new die costs $1,200–$3,500 and takes 3 weeks to build and validate.
FAQ
What is the minimum order quantity for this stamped battery connector plate?
No MOQ — we accept one-piece samples for verification, and production pricing starts at 500 pieces.
Can you customize the contact finger length or bend angle?
Yes, we adjust the die geometry for custom finger length, width, and bend angle within 0.1 mm increments — just send your drawing or a sketch with critical dimensions.
How do you ensure quality for high-volume battery pack assembly?
We use SPC (Statistical Process Control) on critical dimensions, plus 100% visual inspection and a 5-piece CMM audit per lot, with reports available on request.
What is the typical lead time for a custom stainless steel power spring contact stamped battery connector plate?
For a new die: 25 days from drawing approval to first shipment; for an existing die: 12–15 days; for standard sizes in stock: 5 days.
Get a Firm Quote Within 12 Hours — Send Your Drawing Today
We reply with a firm price and lead time within 12 hours of receiving your RFQ. Email your drawing (STEP, DXF, or PDF) to sc@bquq.com or reach us on WhatsApp at +86 13713157787. This is precision manufacturing, made in China with 20 years of stamping experience — we’ve shipped over 40 million battery connector plates without a single field failure. If you’re still selecting the right material or finish, read our CNC cutting tool selection guide for die maintenance tips, or check the CNC machining tolerances guide to see what we can hold on your next project. No MOQ, no runaround — just a quote you can take to your purchasing team.
