Top 10 Liquid Cold Plate Manufacturers in China: A 2026 Engineering Buyer’s Guide

Introduction

Power curves on AI servers and high-density compute cards have gone almost vertical over the past two years, and it’s pushing more buyers than ever to compare liquid cold plate manufacturers in China, where most of this supply chain is concentrated. A single GPU or AI accelerator now runs hot enough to push past what conventional air cooling can physically carry away — which is exactly why direct-to-chip liquid cooling has moved so fast into mainstream AI data center design. This isn’t a forecast anymore: analysts expect liquid cooling penetration in high-end AI infrastructure to hit 53% in 2026, which means it’s already the baseline, not the exception.

For the engineers and procurement leads actually placing orders, the question has shifted. It’s no longer whether to go liquid — it’s how to tell which of China’s many cold plate manufacturers can actually back up their engineering claims, and which ones are better at marketing than manufacturing. That’s what this guide is for. We won’t re-explain what a cold plate is, how it’s designed, or how it’s built — for that groundwork, see our dedicated pieces on what a liquid cold plate is and how it works, cold plate design, and cold plate manufacturing processes. Instead, we’re putting ten of the most active manufacturers in China side by side against the same buyer’s checklist.

Featured Snippet Target

The top liquid cold plate manufacturers in China are compared here by four things that actually predict reliability: material and joining-process capability, validation practices (thermal simulation, leak testing), certification, and production scalability — not by marketing claims or homepage polish. (For what a cold plate itself is, see our dedicated article — this guide is about who builds them well.)

Why China Dominates Liquid Cold Plate Manufacturing

China’s cold plate manufacturing cluster didn’t happen by accident. On one side, the country has the full supply chain already in place — copper and aluminum stock, precision machining, welding equipment — and cold plates are precision- and consistency-sensitive enough that proximity to an established metalworking base translates directly into shorter lead times and lower cost at both the prototype and production stages. On the other side, EV battery thermal management and AI data centers are both scaling fast, and both are pulling demand through the same domestic supply base, which has compounded China’s capacity and process know-how faster than almost anywhere else. The data center liquid cooling market alone is projected to approach $7 billion by 2029, and a meaningful share of that build-out will run through Chinese manufacturers.

But a dense supply base means more options, not more reliable ones. The real work for a buyer is separating the manufacturers with genuine engineering depth from the rest of the field.

What Actually Separates a Good Cold Plate Manufacturer From a Mediocre One

This section is a fast decision checklist, not a design tutorial — we’ve already covered the deep technical ground in our guides on cold plate design and cold plate manufacturing processes. Jump there if you need the full picture.

Material and Process: What a Manufacturer Can Actually Do, Not Just What It Quotes

The logic behind choosing copper, aluminum, or a copper-aluminum composite — and behind picking vacuum brazing, friction stir welding (FSW), or an embedded-tube design — is something we’ve already broken down in our cold plate design guide. In the context of choosing a manufacturer, the real question is simpler: does this shop run one process, or can it actually recommend the right combination for your application? Brazed and embedded-tube cold plates diverge sharply in thermal performance and where each one holds up in practice — a shop that only knows one of the two can’t give you a genuine trade-off comparison, it can only sell you what it already makes.

Friction stir welding is worth asking about specifically. It’s shown up increasingly often in cold plate manufacturing over the past few years because it creates a solid-state joint without melting the base metal, which typically gives it better leak-tightness and structural integrity than traditional brazing. A manufacturer that offers FSW alongside brazing and embedded-tube options can actually match the process to your application instead of defaulting to whatever their line is already set up for.

Validation: Thermal Simulation, Leak Testing, and Flatness Control

A manufacturer worth working with should hand you a thermal simulation report at the prototype stage — not leave you to discover a cooling shortfall after the system’s already assembled. Leak testing (helium leak detection, for instance) and flatness control at the cold plate’s contact surface are the two variables that most directly determine real-world thermal performance and long-term reliability, and they’re also the two things suppliers are most likely to gloss over during a quote. Ask for this validation data upfront, at the prototype stage, rather than tracing a failure back to it later. (For the process-level detail behind these validation steps, see our cold plate manufacturing process guide.)

Certifications That Actually Matter: ISO 9001, ISO 50001, IECQ QC080000 vs. Marketing Claims

“Certified” by itself doesn’t tell you much. ISO 9001 (quality management), ISO 50001 (energy management), and IECQ QC080000 (hazardous substance process management) each cover a completely different dimension of a manufacturer’s operation. Ask for verifiable certificates with current expiration dates — not a homepage line claiming “internationally certified” with no specifics behind it.

Prototyping Speed, MOQ Flexibility, and Production Scalability

For a part as customization-heavy as a cold plate, how fast a shop can turn a prototype into full production, how flexible its minimum order quantities are, and whether its line can actually scale from a pilot run to volume usually tells you more about real engineering capability than who quotes the lowest price. This matters most when your product is still in validation or early ramp — a shop built only for large standard runs can slow your whole project down.

China’s Top 10 Liquid Cold Plate Manufacturers to Know in 2026

The table below is organized by positioning and core process capability, not by “who’s #1” — and each manufacturer’s homepage is linked directly so you can verify for yourself. Aside from APALTEK, all information on the other nine companies comes from their own websites and public reporting; we’ve stated only what’s publicly verifiable and left out self-promotional language (“industry-leading,” “top-tier,” “high-precision,” and similar claims are excluded entirely).

APALTEK

Website: apaltek.com

APALTEK is a full-chain liquid cooling and thermal management manufacturer. Its product range spans cold plates (CP-ALCU, CP-AL, and CP-CU series), closed-loop and open-loop liquid cooling modules, In-Rack/In-Row CDUs, manifolds, and DC fans and pumps. The company holds 300+ patents and is certified to ISO 9001:2015 (quality management), ISO 50001:2018 (energy management), and IECQ QC080000:2017 (hazardous substance process management), with products meeting CE, FCC, and UKCA compliance. Its applications span AI data centers, servers and workstations, laser and optical modules, power electronics, medical devices, robotics, energy storage, and EVs. Because its product line runs from a standalone cold plate all the way to a system-level CDU, APALTEK is a natural fit for buyers who want cold plates and system integration handled by a single supplier.

Guangdong Winshare Thermal Technology

Website: winsharethermalloy.com

Guangdong Winshare Thermal Technology (also operating under the Winshare Thermal brand) was founded in 2009 and is headquartered in Qingxi Town, Dongguan, Guangdong, with an additional production facility in Chonburi Province, Thailand; its site lists a plant footprint of roughly 60,000 square meters. Its product line covers four cold plate types — brazed, friction stir welded (FSW), embedded-tube, and die-cast — along with heat sinks and vapor chambers. The company is certified to ISO 9001:2018, IATF 16949, ISO 14001, and ISO 45001. Its site describes its business as centered on thermal management for AI, automotive/EV, renewable energy, telecommunications, and laser/medical equipment applications.

XD Thermal Technology

Website: xdthermal.com

Headquartered in the Suzhou New District (SND), Jiangsu Province, XD Thermal’s product line is centered on EV battery thermal management — including cooling plates for prismatic, pouch, and blade battery formats, plus extruded serpentine cooling tubes covering cell formats such as 18650, 21700, 32700, and 4680, along with battery cooling trays. Its site states design, simulation, validation testing, and mass-production capability, with hydroforming and extrusion as its primary manufacturing processes and aluminum alloys such as 3003/4343 and 3003/4045 as its main materials. The company is IATF 16949 certified for automotive quality management. Its markets span EVs, energy storage systems, solar inverters, heavy equipment, eVTOL, marine systems, and data centers.

Sanhua (三花控股集团)

Website: sanhuagroup.com

Sanhua Holding Group, founded in 1984, is a diversified, publicly listed group whose core businesses are refrigeration components and automotive thermal management — spanning HVAC&R components, home appliance components, and automotive air-conditioning parts such as thermal expansion valves and receiver-driers. Its site states that domestic and overseas revenue are roughly split evenly, that about 70% of revenue comes from customers ranked among the world’s top 30 in their respective industries, and that more than ten of its product categories hold the #1 global market share, with over thirty ranked in the global top three. Its site content is focused on home appliances, HVAC, and automotive air-conditioning thermal management — it does not feature a dedicated liquid cold plate or data center product line — so buyers with a specific cold plate requirement should contact the relevant business unit directly to confirm whether matching products and capacity exist.

Lori Thermal

Website: lorithermal.com

Headquartered in Baoan District, Shenzhen, Guangdong, Lori Thermal’s site describes itself as a high-tech enterprise focused on high-power thermal cooling solutions, with more than 10 years in business. Its product line spans liquid cold plates (vacuum-brazed, friction stir welded, buried/embedded-tube, and direct-to-chip variants), heat sinks (skived fin, extruded, heat pipe, die-cast, bonded fin, stamped fin), coolant distribution units (CDUs), and server-cooling components such as manifolds, quick disconnects, and memory cooling. Listed manufacturing capabilities include CNC machining, friction stir welding, vacuum brazing, soldering, stamping, and extrusion. Its markets include data centers, AI systems, EV batteries, telecommunications, laser equipment, medical devices, aerospace, defense electronics, and renewable energy. No specific quality certifications are listed on the site.

Kenfa Tech

Website: kenfatech.com

Headquartered in Nancheng Subdistrict, Dongguan, Guangdong, Kenfa Tech’s site states more than 10 years in business. Its core products are liquid cold plates and heat sinks, manufactured using brazing, friction stir welding (FSW), soldering, skived-fin production, cold forging, extrusion, die-casting, and CNC machining, including copper-tube cold plates and heat-pipe-integrated products. The company is certified to ISO 9001:2015, IATF 16949:2016, and ISO 14001:2004. Its markets include EV batteries, medical devices, 5G telecom, inverters, data centers, laser equipment, IGBT modules, LED lighting, photovoltaic inverters, and energy storage systems. Its site notes that some of its engineers previously worked at thermal/electronics manufacturers including AAVID and Foxconn.

Awind

Website: awind-thermal.com

Headquartered in Dongguan, Guangdong, with two production facilities in Zhangmutou Town and Tangxia Town, Awind’s site states more than 20 years in thermal management. Its product line includes multiple heat sink types (heat pipe, vapor chamber, skived fin, aluminum extrusion, pin fin, folded fin) alongside liquid cold plates (copper tube, FSW, and vacuum-brazed variants). The site references thermal simulation using ICEPAK software and describes an integrated design, R&D, manufacturing, export, and service capability. Its homepage displays logos for Huawei, Dell, GE, OnSemi, HP, Cisco, and Intel — logo placement like this typically indicates some form of business relationship, but the depth and scope of that relationship isn’t independently verified here, so buyers should confirm directly with the manufacturer. No specific quality certifications are listed on the site.

M-stirling

Website: m-stirling.com

Headquartered in the Jiangning Development Zone, Nanjing, Jiangsu, M-stirling’s site describes the brand as an extension of Metalli’s business, focused on cooling and refrigeration. Its product line includes tube-fin, plate-fin, and microchannel heat exchangers; air, liquid, and phase-change thermal management solutions; liquid cold plates; aluminum and copper heat sinks; automotive radiators and AC condensers; and hydraulic oil coolers. Manufacturing processes include vacuum brazing, controlled-atmosphere brazing, welding, CNC machining, aluminum extrusion, aluminum die-casting, and sheet metal fabrication. Product pages reference the ISO 9001 standard. Its markets include construction equipment, agricultural and forestry machinery, green energy, rail vehicles, compressor systems, hydraulic systems, automotive, air separation/chemical processing, and electrical control systems.

Kingka Tech

Website: kingkatech.com

Headquartered in Xie Gang Town, Dongguan, Guangdong, Kingka Tech’s site states more than 15 years in thermal management and precision manufacturing, with 35 CNC machining centers. Its product line includes liquid cold plates (CPU/GPU water blocks, copper/stainless-steel tube variants, FSW, deep-hole machining, vacuum brazing/welding, and assembled types), heat sinks (extrusion, skived fin, bonded fin, cold forging, die-casting, heat pipe), and precision CNC-machined parts. Manufacturing processes include CNC milling, turning, and skiving, stamping, cold forging, soldering, die-casting, and surface treatment. Its site states that products go through at least four rounds of quality inspection before shipment. Its markets include telecommunications, power and energy, transportation, semiconductors, medical devices, consumer electronics, and automotive/EV.

ToneCooling

Website: tonecooling.com

Founded in 2004 and headquartered in Huizhou, Guangdong, ToneCooling’s site names Li Bing as its founder. It operates a roughly 30,000 m² precision manufacturing facility in Boluo, Huizhou, with 200+ employees, about 40% of whom are technical staff averaging around 20 years of experience. Its product line includes friction stir welded (FSW) cold plates, vacuum-brazed cold plates, embedded-tube cold plates, and liquid cold plates designed for CPUs/GPUs and EV batteries. Equipment includes 80+ CNC machines and a 1.2-meter by 68-meter aluminum tunnel brazing line. The company is certified to ISO 9001, ISO 14001, and IATF 16949, and holds 46 patents (14 invention patents and 32 utility model patents). Its markets span AI computing, data centers, EV battery systems, IGBT/SiC power modules, energy storage, photovoltaic inverters, medical imaging, high-power laser equipment, 5G infrastructure, and aerospace, with customers in 30 countries according to its site. Its site states annual shipments of more than 1 million cold plates, with a minimum order quantity of 5 units and a 7–15 day prototype lead time.

Matching the Manufacturer to Your Application

• AI data centers / servers: Look for engineering experience with high-heat-flux direct-to-chip cooling, and for whether the manufacturer can supply system-level components like In-Rack/In-Row CDUs and manifolds — not just a standalone cold plate. Leak-tightness and flatness control matter most here, since this application has the least tolerance for error.
• EVs / energy storage: Prioritize long-term material-to-coolant compatibility (corrosion resistance), batch-to-batch consistency, and any automotive- or energy-storage-grade quality system experience.
• Industrial equipment (laser/optical modules, power electronics, etc.): These applications tend to be more custom and lower-volume, so prioritize prototyping turnaround and the ability to machine non-standard geometries over large-batch standard-part capacity.

Questions to Ask Before You Place an Order

Get a Free Cold Plate Evaluation

Choosing a cold plate manufacturer ultimately comes down to who can back up their engineering claims against your actual power density, contact surface size, and target temperature — not who has the best-looking homepage. If you’d rather skip the process of contacting and comparing manufacturers one by one, send your operating parameters (power, contact surface dimensions, target inlet/outlet coolant temperature) to APALTEK’s engineering team, and we’ll provide a free cold plate selection recommendation and thermal simulation evaluation based on your numbers.