Automatic liquid adding device for storage battery of electric passenger car

The invention discloses an automatic liquid adding device for a storage battery of an electric passenger car. The automatic liquid adding device comprises a long-strip-shaped shell, a detection pump and a liquid injection pump, wherein the detection pump and the liquid injection pump are arranged in the long-strip-shaped shell; the liquid injection pump is used for injecting electrolyte into the storage battery monomer; the detection pump is used for detecting the real-time electrolyte liquid level in the storage battery monomer when the electrolyte is injected; a liquid inlet of the liquid injection pump is connected with the liquid inlet hose, and a liquid outlet is connected with the liquid injection pipe; a liquid inlet of the detection pump is connected with the detection liquid inlet pipe, and a liquid outlet is connected with the detection liquid outlet pipe; the liquid inlet hose extends out of one end of the long-strip-shaped shell and is used for being inserted into electrolyte to be injected; the l