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FSW welding subcontracting process for energy storage liquid cold plates

Leak-proof aluminum energy storage liquid cold plate (FSW welding subcontracting finished product)

High-strength FSW weld seam detail of energy storage

Custom FSW equipment for energy storage liquid cold plate welding subcontracting

Energy Storage Liquid Cold Plate Friction Stir Welding Service

Our energy storage liquid cold plate welding subcontracting service is designed for thermal management components used in ESS and BESS systems.
Using friction stir welding (FSW), we deliver leak-proof, high-strength aluminum cooling plates suitable for long-term, high-load energy storage applications.
Customers may provide machined cold plate components for our welding-only service, or choose a one-stop manufacturing solution covering machining, welding, inspection, and delivery.
With stable process control and proven experience, we help reduce leakage risks, scrap rates, and lead times.

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Product Description

Industry Pain Points We Solve

In energy storage liquid cold plate production, traditional welding processes and scattered supply chains often bring unavoidable challenges. Our FSW welding subcontracting service directly addresses these core pain points for manufacturers:

High Leakage Risk: Long-channel aluminum liquid cold plates are prone to leakage due to porosity and micro-cracks caused by conventional welding — a critical issue for energy storage safety.
Unstable Thermal Performance: Inconsistent weld penetration leads to uneven coolant flow, reducing the heat dissipation efficiency of cold plates and affecting energy storage system stability.
Product Warping & Distortion: High heat input in traditional welding causes deformation of large, flat cold plate geometries, increasing assembly difficulty and scrap rates.
High Cost & Delivery Uncertainty: Cooperating with multiple suppliers (machining, welding, inspection) increases communication costs, delays, and quality control risks.

Why Choose Our FSW Welding Subcontracting Service?

Our advantages lie in professional FSW technology, rich industry experience, and integrated service capabilities — making us a reliable welding subcontracting partner for energy storage manufacturers worldwide:

1. Flexible & Customizable Cooperation Models

We adapt to your production layout: you can provide pre-machined cold plate parts for our welding-only service, or enjoy a full turnkey solution (machining → welding → inspection → delivery). No matter the scale of your project (pilot or mass production), we can match your timeline and quality requirements.

2. Leak-Proof & High-Strength Weld Quality

We adopt advanced friction stir welding (FSW) technology — a solid-state welding process that eliminates porosity, micro-cracks, and other defects common in traditional fusion welding. The weld joints are dense, high-strength, and completely leak-proof, ensuring the long-term reliability of energy storage cold plates in harsh working environments. This has been fully verified in our cooperation with overseas energy storage module manufacturers, where the weld qualification rate reaches 99.8%.

3. Stable Thermal Performance & Precision

Our FSW process achieves uniform weld penetration and smooth weld surfaces, ensuring consistent coolant flow and efficient heat transfer. We design custom fixturing for large, flat cold plate geometries, effectively avoiding warping and distortion, and ensuring the dimensional accuracy of each product meets your assembly requirements (precision ±0.1mm).

4. Shortened Lead Time & Cost Savings

Integrating machining and welding into one-stop service eliminates the need for multiple supplier cooperation, reduces communication costs and intermediate links, and shortens the overall supply chain lead time by 30% on average. At the same time, stable process control reduces scrap rates to less than 0.5%, further helping you save production costs.

5. Professional Expertise in New Energy & Energy Storage

Beyond energy storage cold plates, we have extensive experience in welding subcontracting for new energy vehicle (NEV) battery enclosures, battery trays, and other key components. We deeply understand the strict technical requirements of the new energy and energy storage industries, and our custom FSW equipment can be tailored to your specific welding needs, ensuring the compatibility and stability of the welding process.

Applications

Our energy storage liquid cold plate FSW welding subcontracting service is widely used in various energy storage scenarios, covering:

Energy Storage System (ESS) Liquid Cold Plates
Battery Energy Storage System (BESS) Cooling Plates
Aluminum Liquid Cooling Plates for Power Storage Modules
Industrial Energy Storage Thermal Management Components
NEV-related Energy Storage Auxiliary Cooling Components

Technical Specifications & Highlights

We focus on technical details to ensure stable and reliable welding results for your projects, with the following core technical advantages:

Material Compatibility: Specialized in welding aluminum alloys for thermal management (e.g., 5083, 6061, 6082) — the most commonly used materials for energy storage cold plates, ensuring good weldability and thermal conductivity.
Welding Thickness Range: 1mm - 10mm, optimized for common cold plate structures (thin-walled, long-channel, large-area flat plates).
Long-Channel Welding Capability: Stable weld penetration over extended weld paths (maximum length up to 3000mm), suitable for long-channel cold plate designs.
Custom Fixturing: Custom-designed fixtures for large, flat cold plate geometries, ensuring welding precision and avoiding deformation.
Strict Quality Control System: Full-process quality monitoring, including leak testing (1.5MPa pressure holding for 30 minutes, zero leakage), dimensional inspection (precision ±0.1mm), and complete process traceability (recording welding parameters, inspection results for each product).

FAQ

We answer the most common questions from our welding subcontracting customers to help you understand our service better:

Q1: Do you support welding-only service for energy storage liquid cold plates?

Yes, we do. You can provide pre-machined cold plate components, and we will complete the FSW welding process according to your technical requirements, ensuring weld quality and on-time delivery.

Q2: Can you provide a complete one-stop manufacturing service?

Absolutely. Our turnkey solution covers all links from raw material machining, FSW welding, strict quality inspection to final delivery, allowing you to save time and energy on supplier management.

Q3: How do you ensure the leak-proof performance of the welded cold plates?

We achieve leak-proof performance through three guarantees: ① FSW solid-state welding eliminates porosity and micro-cracks; ② Precise control of welding parameters (rotational speed, welding speed, axial force) to ensure weld density; ③ 100% leak testing for each finished product (1.5MPa pressure holding for 30 minutes) before delivery.

Q4: Is this service suitable for large-scale mass production of energy storage systems?

Yes. Our FSW welding process is highly scalable — we have custom FSW equipment and mature production lines that can meet both small-batch pilot projects and large-scale mass production needs (daily output up to 500 pieces), ensuring consistent product quality and on-time delivery.

Q5: Do you provide welding services for other new energy products besides energy storage cold plates?

Yes. As a professional FSW equipment customization and welding subcontracting manufacturer, we also provide welding services for new energy vehicle battery enclosures, battery trays, and other key components, with rich industry experience and mature technical solutions.

CTA

Whether you need welding-only support for energy storage liquid cold plates, a one-stop turnkey manufacturing solution, or custom FSW equipment for your production line, we are here to provide professional support.

⚡ Contact us today to discuss your specific welding subcontracting requirements — our professional technical team will provide you with a tailored FSW welding solution, ensuring high quality, efficiency, and cost savings for your energy storage and new energy projects.

Energy Storage Liquid Cold Plate Friction Stir Welding Service