钠电池 PACK 的防水等级有什么要求？

What are the waterproof grade requirements for sodium-ion battery PACK?

PACK 防水采用 IP 标准分级，第二位数字代表防水能力，根据应用场景差异化制定硬性指标，杜绝进水凝露故障。室内机房、户内柜式储能环境干燥无雨水，最低标准 IP54，可防飞溅水汽、室内潮气侵入；户外分布式光伏、电动三轮车、露营电源长期露天淋雨，强制 IP67，可短时完全浸水无进水；海上风电、船舶储能设备长期接触海水水雾，执行最高 IP68 水下浸没标准；通信户外机柜常规 IP55 抵御暴雨喷淋。IP 第一位代表防尘，第二位防水数值越高防护越强，防水依靠密封胶条、一体化壳体、防水连接器协同实现。等级不足的 PACK 在雨天、高湿环境会出现内部凝露，绝缘电阻大幅下降，引发漏电、模组压差紊乱甚至内部短路起火。北方露天储能、沿海项目统一升级至 IP67 标准，出厂配套喷淋防水抽样检测验证密封可靠性。

PACK waterproof performance is graded by IP standards, with the second digit representing waterproof capacity and rigid indicators differentiated according to application scenarios to eliminate water ingress and condensation faults. Indoor machine rooms and indoor cabinet energy storage are dry without rain, with the minimum standard IP54 to resist splashing water vapor and indoor moisture infiltration. Outdoor distributed photovoltaics, electric tricycles and camping power supplies exposed to rain for a long time are mandatory to reach IP67, capable of short-term full immersion without water entry. Offshore wind power and marine energy storage equipment exposed to seawater mist for a long time implement the highest IP68 underwater immersion standard. Outdoor communication cabinets adopt conventional IP55 to resist heavy rain spray. The first IP digit represents dust resistance, and the higher the second waterproof digit, the stronger the protection. Waterproof performance is realized jointly by sealing strips, integrated shells and waterproof connectors. PACKs with insufficient grades will generate internal condensation under rainy and high-humidity environments, sharply reduce insulation resistance, trigger electric leakage, disordered module voltage difference and even internal short-circuit fire. Northern open-air energy storage and coastal projects are uniformly upgraded to IP67 standard, with spray waterproof sampling inspection at factory delivery to verify sealing reliability.