A valve comprising housing body, partition plate, and collecting device. The housing body defines a housing cavity. The partition plate is provided in the housing cavity. A leakage passage extends along the partition plate through the housing body. The collecting device comprises a lower piece, an upper piece, and a connector connecting them. The upper piece and the lower piece cover a leakage passage upper port and a leakage passage lower port, respectively. The lower piece comprises a collecting cavity communicating with the leakage passage lower port. The lower piece and lower part of the housing body are provided with lower fitting assembly. The upper piece and upper part of the housing body are provided with an upper fitting assembly. The lower piece and the upper piece are fitted on the housing body in place by means of the lower fitting assembly, the upper fitting assembly and the connector.

A valve comprising housing body, partition plate, and collecting device. The housing body defines a housing cavity. The partition plate is provided in the housing cavity. A leakage passage extends along the partition plate through the housing body. The collecting device comprises a lower piece, an upper piece, and a connector connecting them. The upper piece and the lower piece cover a leakage passage upper port and a leakage passage lower port, respectively. The lower piece comprises a collecting cavity communicating with the leakage passage lower port. The lower piece and lower part of the housing body are provided with lower fitting assembly. The upper piece and upper part of the housing body are provided with an upper fitting assembly. The lower piece and the upper piece are fitted on the housing body in place by means of the lower fitting assembly, the upper fitting assembly and the connector.

A temperature control system. The temperature control system includes a plurality of liquid pipelines and a multi-port valve. The multi-port valve includes a valve body and a valve core. The valve body has a mounting cavity, and the valve core is mounted in the mounting cavity. The valve body includes a body and a block-shaped additional portion, the mounting cavity is located on the body, and the block-shaped additional portion is attached to at least a part of a side wall of the body. The valve body includes a plurality of vias, and each via penetrates the block-shaped additional portion and a corresponding side wall of the body. Each liquid pipeline is configured to communicate with one via, there is a battery pack on at least one liquid pipeline, and the temperature control system is configured to control a temperature of the battery pack.