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新能源电动汽车PDU的散热解决方案

  • 2026-02-04 13:48:55
新能源电动汽车PDU的散热解决方案

前言

在新能源电动汽车的核心高压系统中,高压配电单元(PDU)扮演着“电能枢纽”的关键角色。它负责将动力电池的高压直流电,进行智能分配、转换与控制,以驱动电机、空调压缩机等核心部件,并为低压系统供电。其工作原理高度集成,通过内部精密的母排网络、功率半导体开关器件(如IGBT/MOSFET)、控制器及各类保护元件,实现对电能安全、高效的调度。

PDU的设计遵循安全、可靠、紧凑及轻量化四大核心原则。其结构通常采用模块化设计,将功率模块、控制板、连接器等高度集成于一个具备优异密封与电磁屏蔽性能的金属壳体内。这种高集成度与高功率密度的发展趋势,使得内部热管理成为设计的核心挑战——功率器件工作时产生的大量焦耳热若不能及时导出,将直接导致器件过热失效、性能衰减,甚至引发安全事故。

PDU的工作原理

随着1000V高压平台普及,PDU工作电流剧增,热量积聚问题凸显,传统散热依赖导热硅胶片、PET膜和液冷板,但面临导热效率低,热量传输受 PET 层阻隔的难题;在此背景下,轻薄导热硅胶垫片、导热绝缘片和液冷板的结合成为一项突破性解决方案。

导热硅胶垫片和导热绝缘片是一种兼具高导热性与高绝缘性的复合材料,通常以高分子聚合物(如硅胶、聚酰亚胺)为基体,填充氧化铝、氮化硼等高性能陶瓷导热粒子。其散热原理在于,通过片材内形成的连续导热通路,高效地将器件热源的热量“抽离”并横向扩散,最终经由垂直方向传递至或液冷板上。同时,其基体材料提供了可靠的电气绝缘屏障,能承受数千伏的高压,完美解决了散热与绝缘的矛盾。

最优散热解决方案(使用晟鹏科技的导热绝缘片和导热硅胶片)

在PDU中,导热硅胶片与导热绝缘片被广泛应用于功率模块与外壳、母排与壳体等关键界面。它不仅能有效填充微观空隙以降低接触热阻,其柔韧性也确保了在复杂不平表面上的紧密贴合。这一材料的应用,显著提升了PDU的散热均效与长期可靠性,是支撑电动汽车向更高电压平台与更高功率密度发展的关键材料创新。

综上,轻薄导热硅胶片、导热绝缘片和液冷板的结合精准契合PDU设计需求,有效解决高压大电流工况下的散热与绝缘难题。随着新能源汽车向高功率、集成化发展,其在PDU热管理中的核心作用将愈发凸显,为车辆高压系统安全稳定运行提供坚实保障。

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  1. CONNECT:[ UseTime:0.000503s ] mysql:host=127.0.0.1;port=3306;dbname=e_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000891s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.022417s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004194s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000648s ]
  6. SELECT * FROM `set` [ RunTime:0.009012s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000585s ]
  8. SELECT * FROM `article` WHERE `id` = 468741 LIMIT 1 [ RunTime:0.036937s ]
  9. UPDATE `article` SET `lasttime` = 1770394886 WHERE `id` = 468741 [ RunTime:0.004101s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001331s ]
  11. SELECT * FROM `article` WHERE `id` < 468741 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003530s ]
  12. SELECT * FROM `article` WHERE `id` > 468741 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000477s ]
  13. SELECT * FROM `article` WHERE `id` < 468741 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020455s ]
  14. SELECT * FROM `article` WHERE `id` < 468741 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.030301s ]
  15. SELECT * FROM `article` WHERE `id` < 468741 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005781s ]
0.218075s