什么是钠电池的内阻？

What is the internal resistance of Sodium-ion Battery?    

钠电池内阻是指电池内部阻碍离子迁移和电子传导的总阻力，是衡量电池性能优劣的核心参数，单位为毫欧。内阻由电极材料阻力、电解液离子传导阻力、隔膜穿透阻力、接触电阻等多部分组成。内阻数值越小，代表离子和电子传输越顺畅，电池充放电效率越高、电量损耗越少、发热越少、动力输出越稳定；反之，内阻过大，充放电过程中会产生大量热量，电量损耗严重，充放电效率下降，长期使用易出现过热、衰减加速等问题。优质量产钠电池内阻极低，能够保障高效稳定运行。

The internal resistance of Sodium-ion Battery refers to the total resistance that hinders ion migration and electron conduction inside the battery, which is a core parameter to measure the performance of the battery, and the unit is milliohm. The internal resistance is composed of electrode material resistance, electrolyte ion conduction resistance, separator penetration resistance, contact resistance and other parts. The smaller the internal resistance value, the smoother the transmission of ions and electrons, the higher the charge and discharge efficiency of the battery, the less power loss, the less heat generation, and the more stable the power output; on the contrary, if the internal resistance is too large, a lot of heat will be generated during the charge and discharge process, the power loss is serious, the charge and discharge efficiency decreases, and problems such as overheating and accelerated attenuation are prone to occur during long-term use. High-quality mass-produced sodium batteries have extremely low internal resistance, which can ensure efficient and stable operation.