Abstract: Provided is an excitation protection device acting step by step with a single excitation source, including a shell body, an excitation source, impact devices and a conductor, wherein at least two impact devices respectively located in different cavities are provided in the shell body, one side of the impact device is provided with one excitation source, and the impact device and the excitation source are respectively in sealed contact with the cavities where the impact device and the excitation source are located; and the excitation source drives the impact devices to displace simultaneously or successively, and at least one of the impact devices breaks the conductor during the displacement process.

Abstract: Provided are a fuse and a circuit system. The fuse includes: a housing, a closed chamber being provided in the housing and being filled with an arc extinguishing filler, and a first conductive terminal and a second conductive terminal which are used as a current input end and a current output end being respectively connected to the housing; a melt which is connected in series between the first conductive terminal and the second conductive terminal, at least part of the melt being disposed through the closed chamber; and an impact apparatus, which is arranged in the housing, is positioned outside the closed chamber, and is configured to act, when receiving an excitation signal, on the melt to generate an impact force to make the melt break in the closed chamber.

Abstract: An excitation protection device acting step by step with a single excitation source, including a shell body, an excitation source, impact devices and a conductor, wherein at least two impact devices respectively located in different cavities are provided in the shell body, one side of the impact device is provided with one excitation source, and the impact device and the excitation source are respectively in sealed contact with the cavities where the impact device and the excitation source are located; and the excitation source drives the impact devices to displace simultaneously or successively, and at least one of the impact devices breaks the conductor during the displacement process. The excitation protection device of the present disclosure can be used for the protection of battery packs and load circuits of electric vehicles, or in other power control circuits.

Abstract: The present disclosure provides an excitation fuse with a conductor and a fusant being sequentially broken, the excitation fuse comprising a housing and a cavity in the housing, wherein at least one conductor is provided to be inserted in the housing and the cavity and has two ends connected with an external circuit; at least one fusant is provided in parallel on the conductor; an excitation device and a breaking device are mounted in the cavity at one side of the conductor; the excitation device may receive an external excitation signal to act to drive the breaking device to sequentially form at least one fracture on the conductor and the fusant respectively; and at least one fracture on the conductor is connected in parallel with the fusant.

Abstract: Provided are a fuse and a circuit system. The fuse includes: a housing, a closed chamber being provided in the housing and being filled with an arc extinguishing filler, and a first conductive terminal and a second conductive terminal which are used as a current input end and a current output end being respectively connected to the housing; a melt which is connected in series between the first conductive terminal and the second conductive terminal, at least part of the melt being disposed through the closed chamber; and an impact apparatus, which is arranged in the housing, is positioned outside the closed chamber, and is configured to act, when receiving an excitation signal, on the melt to generate an impact force to make the melt break in the closed chamber.

Abstract: The present disclosure provides an excitation fuse with a conductor and a fusant being sequentially broken, the excitation fuse comprising a housing and a cavity in the housing, wherein at least one conductor is provided to be inserted in the housing and the cavity and has two ends connected with an external circuit; at least one fusant is provided in parallel on the conductor; an excitation device and a breaking device are mounted in the cavity at one side of the conductor; the excitation device may receive an external excitation signal to act to drive the breaking device to sequentially form at least one fracture on the conductor and the fusant respectively; and at least one fracture on the conductor is connected in parallel with the fusant.