什么是钠电池的湿热测试？

What is the damp heat test for sodium-ion batteries?

湿热测试模拟南方梅雨、地下室高湿仓储环境，检验 PACK 密封、绝缘系统长期耐潮性能。标准工况温度 60℃、相对湿度 95% RH，样品连续放置 480 小时不间断监测电压与绝缘。高湿高温水汽会透过密封缝隙进入包体，凝露附着高压线束、B 板电路板，引发漏电、线路腐蚀，单串电芯压差持续拉大。测试完成取出常温干燥 24 小时复测绝缘电阻，绝缘值无大幅下滑、无壳体内部凝露水渍、电芯无自放电异常判定合格。户用储能、地下室备用电源 PACK 必须通过湿热测试，密封工艺缺陷产品长期高湿环境极易出现 BMS 短路停机。

Damp Heat Test simulates plum rain in southern China and high-humidity basement storage to verify long-term moisture resistance of PACK sealing and insulation systems. Standard conditions: 60℃, 95% RH relative humidity, continuously place samples for 480 hours with uninterrupted voltage and insulation monitoring. High-temperature humid vapor penetrates sealing gaps and condenses on high-voltage harnesses and BMS circuit boards, triggering electric leakage and circuit corrosion with continuously widened single-string voltage difference. Take out samples, dry at room temperature for 24 hours and retest insulation resistance; the sample passes without sharp insulation drop, internal condensation or abnormal cell self-discharge. Household storage and basement backup power PACKs must pass damp heat testing. Products with defective sealing easily suffer BMS short-circuit shutdown under long-term high humidity.