Direct-current contactor, power distribution box, power battery assembly, and vehicle

A power distribution box, wherein the power distribution box comprises:

• a contact assembly comprising a moving contact mechanism and a stationary contact mechanism that are disposed in pairs, wherein the moving contact mechanism comprises a moving contact and the stationary contact mechanism comprises a stationary contact and an arc introducing plate disposed around the stationary contact;
• an arc extinguishing assembly disposed around the contact assembly, wherein
• the arc introducing plate is configured to introduce an electric arc generated between the moving contact mechanism and the stationary contact mechanism into the arc extinguishing assembly;
• the arc extinguishing assembly comprises two fastening frames;
• a plurality of arc extinguishing plates are sequentially disposed in parallel in a direction from the stationary contact to one of the fastening frames;
• and
• the plurality of arc extinguishing plates are divided into two groups separately disposed in a direction from the stationary contact mechanism to the moving contact mechanism;
• and
• a drive assembly configured to drive a connection or a disconnection of the moving contact and the stationary contact.

A direct-current contactor, comprising:

• a contact assembly comprising a moving contact mechanism and a stationary contact mechanism that are disposed in pairs, wherein the moving contact mechanism comprises a moving contact and the stationary contact mechanism comprises a stationary contact and an arc introducing plate disposed around the stationary contact;
• an arc extinguishing assembly disposed around the contact assembly, wherein
• the arc introducing plate is configured to introduce an electric arc generated between the moving contact mechanism and the stationary contact mechanism into the arc extinguishing assembly;
• the arc extinguishing assembly comprises two fastening frames;
• a plurality of arc extinguishing plates are sequentially disposed in parallel in a direction from the stationary contact to one of the fastening frames;
• the plurality of arc extinguishing plates are sequentially arranged in a sector shape in a direction from the stationary contact mechanism to the moving contact mechanism;
• and
• a drive assembly configured to drive a connection or a disconnection of the moving contact and the stationary contact.