It is suitable for the degassing and rubber plugging process after secondary liquid injection. The equipment can preset standard parameters. After the battery is degassed and reaches the preset standard, the battery is sealed with rubber plug. Gas has a huge impact on the battery. The gas remaining inside the battery may cause lithium ion deintercalation, local failure and battery side reactions, further leading to deterioration of battery cycle stability, cycle life, SOH, and consistency! Filling in gaps for degassing quality testing to reduce the impact of gas on the battery.