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打造“冷静”的 AI 算力中心:激光焊接检测助力液冷散热高质量制造

打造“冷静”的 AI 算力中心:激光焊接检测助力液冷散热高质量制造

过去十年,数据中心的核心问题是算力。未来十年,这个问题可能变成散热。

随着 AI 服务器单颗 GPU 功耗从 300W 增长到 1000W 以上,风冷的物理经济性边界已被突破。以当前主流 AI 训练服务器为例,NVIDIA H100 功耗约 700W,NVIDIA B200 功耗达到 1000W 以上,GB200 NVL72 整柜功耗超过 120kW。传统空气冷却方案在高功率服务器场景下逐渐遭遇散热能力限制,而 Direct-to-Chip Liquid Cooling(冷板式液冷)正在成为主流方向 [1]

ASHRAE(美国采暖、制冷与空调工程师协会)指出,AI 和高性能计算(HPC)正在加速液冷技术在主流数据中心的普及。NVIDIA、Meta、Microsoft 等科技企业也在公开技术路线中持续推进液冷基础设施建设。

就在 6 月 1 日的 GTC Taipei 2026 大会上,黄仁勋宣告英伟达下一代 AI 超级芯片平台 Vera Rubin 全面量产,Vera Rubin NVL72 机柜整合 72 颗 Rubin GPU 与 36 颗 Vera CPU,采用 100% 液冷散热设计。

对于下一代高功率 AI 数据中心而言,液冷正在从“可选方案”变成“基础配置” [2]

随之而来的是中国液冷产业链迎来爆发,已形成覆盖关键零部件、液冷IT设备、整体解决方案及智算中心应用实践的完整产业生态,市场规模预计到 2029 年将达到约 1300 亿元 [3]

🟦 液冷产业链,由 AI 算力革命推动的“多米诺骨牌”。

资料来源:中国信通院《智算中心液冷产业全景研究报告(2025)》、ODCC 液冷技术白皮书、行业公开资料,德擎光学整理。

01

液冷系统里,

藏着大量激光加工工艺

液冷系统作为一套管路和冷却液循环系统,本质上也是一套复杂的金属连接系统。从冷板(Cold Plate)到 CDU,再到分液器(Manifold),几乎每一个核心部件都需要激光加工。

🟦 数据中心液冷系统示意

来源:Open Compute Project (OCP) Cooling Environments Project

而激光加工质量,一定程度上决定了液冷系统的生死。

与动力电池类似,液冷系统最大的风险不是散热效率不够,而是泄漏。冷却液一旦泄漏,轻则服务器停机,重则 GPU 损坏,极端情况下甚至导致整个机房宕机,因此液冷行业对焊接等加工质量要求极高。

 1. 冷板焊接 / 3D 打印冷板 

冷板内部通常包含微流道、流体腔体,需要将盖板与基板焊接密封。若焊接出现未熔合、裂纹,则可能形成慢渗漏,且问题往往在出厂检测时无法发现,在运行数月后暴露,潜在影响包括:冷却液泄漏、GPU 损坏、数据中心停机。

除此以外,日前行业已突破 3D 打印纯铜微通道冷板的量产瓶颈,此后金属增材制造将越来越多地承接冷板制造。而 3D 打印过程容易出现的未熔合、不合理支撑、鼓包、翘曲等缺陷,也将严重影响冷板的功用。

2. Manifold 分液器焊接

用于散热的管道装置,负责向多个冷板分配冷却液。其焊接质量直接决定压力稳定性、流量均匀性。

焊缝缺陷可能导致压降异常、流量失衡,影响整柜散热能力。

 3. CDU 焊接

CDU 是液冷系统心脏,涉及不锈钢管路、换热器、储液单元、大量焊接接头。

若焊接质量不足,可能导致泄漏、压力损失、整个液冷回路失效。

 4. UQD 快接头焊接

UQD(Universal Quick Disconnect)是用于快速断开的耦合器,实现液冷系统管路随时快速断开。由于液冷系统需要频繁维护,因此快接头要求零泄漏、高可靠、长寿命。

焊缝微裂纹可能在长期热循环后扩展,最终形成渗漏。

5. 波纹管/柔性连接件

波纹管(Flexible Bellows)通过自身弹性吸收振动和热膨胀应力,是保障液冷系统长期稳定运行的重要部件。

由于其通常处于持续振动和热循环环境中,波纹管与端管、法兰或接头连接处的焊接,即使出现极小的焊接缺陷,也可能在长期运行后逐渐扩展。

液冷部件
焊接目标
潜在缺陷
风险
冷板
密封性
未熔合
漏液
分液器
压力稳定
裂纹
流量失衡
CDU
系统可靠性
虚焊
系统失效
快接头
长寿命密封
微裂纹
长期渗漏
波纹管/柔性连接件
密封性
未熔合、微裂纹
漏液

🟦 液冷系统激光焊接位置及其潜在缺陷和风险

02

AI 时代的液冷制造,

正在走向 100% 在线检测

随着液冷产业规模扩大,传统抽检模式开始失效。因为液冷行业面对的海量检测任务:7×24 小时运行、万卡集群、百亿级数据中心,而任何一个焊接缺陷都有可能被放大。

当焊接质量开始成为数据中心可靠性的关键变量时,激光焊接检测也将从“质量管理工具”,升级为 AI 基础设施的重要组成部分。因此越来越多液冷厂商开始采用激光焊接在线检测。

AI 时代正在重塑基础设施,而每一次基础设施的变革,都建立在对关键机理的深入理解和对制造品质的不懈追求之上。

面向快速发展的液冷产业,德擎光学将继续秉持“以感知 见未知”的理念,通过先进的激光焊接检测技术与专业服务能力,帮助产业伙伴看见制造过程中那些影响性能与可靠性的关键细节。我们期待与 GPU、服务器、液冷系统及核心部件领域的合作伙伴一道,共同打造更加可靠、高效、可持续的下一代 AI 算力基础设施,为液冷产业高质量发展贡献力量。

参考文献:

[1] ASHRAE《Emergence and Expansion of Liquid Cooling in Mainstream Data Centers》

[2] Liquid cooling of data centers: A necessity facing challenges,作者:M. Azarifar 等,期刊:Applied Thermal Engineering 

[3] 中国信通院《智算中心液冷产业全景研究报告(2025年)》

[4] Open Compute Project (OCP) Cooling Environments Project: Liquid Cooling Technologies Overview 

转自:德擎光学DILIGINE
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  1. CONNECT:[ UseTime:0.000564s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000729s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000298s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000280s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000463s ]
  6. SELECT * FROM `set` [ RunTime:0.000200s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000686s ]
  8. SELECT * FROM `article` WHERE `id` = 740714 LIMIT 1 [ RunTime:0.000505s ]
  9. UPDATE `article` SET `lasttime` = 1781252881 WHERE `id` = 740714 [ RunTime:0.000631s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000313s ]
  11. SELECT * FROM `article` WHERE `id` < 740714 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002234s ]
  12. SELECT * FROM `article` WHERE `id` > 740714 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001440s ]
  13. SELECT * FROM `article` WHERE `id` < 740714 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003258s ]
  14. SELECT * FROM `article` WHERE `id` < 740714 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000768s ]
  15. SELECT * FROM `article` WHERE `id` < 740714 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000717s ]
0.092875s