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CN-114220676-B - High contact reliability sexually activated closure

CN114220676BCN 114220676 BCN114220676 BCN 114220676BCN-114220676-B

Abstract

The excitation closer with high contact reliability comprises a first shell, a second shell, an excitation source, a piston, a first conductor and a second conductor, wherein the second shell is arranged in the first shell, the first conductor and the second conductor are arranged in an insulating mode, the first conductor and the second conductor are respectively arranged between contact surfaces of the first shell and the second shell in a penetrating mode, one end of the first conductor is positioned outside the shell, the other end of the first conductor is arranged on the second shell in the first shell in an insulating non-contact mode, and the excitation source receives an excitation signal to drive the piston to enable the first conductor and the second conductor in the first shell to be in conductive contact. The exciting closer can be used for rapidly switching on the grounding branch after the fault current of the main circuit of the battery pack is cut off so as to release the residual energy of the energy storage element in the main circuit, thereby ensuring the safety of the subsequent operation. The second shell is arranged in the first shell, so that the shell structure is more compact and the volume is smaller.

Inventors

  • DUAN SHAOBO
  • WANG XIN
  • SHI XIAOGUANG
  • GE XIBIN

Assignees

  • 西安中熔电气股份有限公司

Dates

Publication Date
20260505
Application Date
20220111

Claims (14)

  1. 1. The high-contact-reliability excitation closer is characterized by comprising a first shell, a second shell, an excitation source, a piston, a first conductor and a second conductor, wherein the second shell is arranged in the first shell, the first conductor and the second conductor are arranged in an insulating mode, the first conductor and the second conductor are respectively arranged between contact surfaces of the first shell and the second shell in a penetrating mode, one end of the first conductor is arranged outside the shell, the other end of the first conductor is arranged on the second shell in an insulating and non-contact mode, the first conductor and the second conductor respectively comprise a pre-contact part, a connecting part and a conducting part, the connecting part is electrically connected with the pre-contact part and the conducting part in a conducting mode, the excitation source receives an excitation signal to drive the piston to enable the pre-contact part of the first conductor and the pre-contact part of the second conductor to be electrically contacted, and when the excitation signal is received, the pre-contact part of the first conductor is deformed to be in a deformed shape of the pre-contact part of the second conductor, or the pre-contact part of the first conductor is provided with an elastic structure, and the pre-contact part of the second conductor is provided with a notch, and the elastic structure is clamped at the notch, so that the pre-contact part of the first conductor and the pre-contact part is electrically contacted with the pre-contact part in a pre-contact mode.
  2. 2. The high contact reliability energized closer of claim 1 wherein the pre-contact portion is in a bent relationship with a connecting portion, the conductive portion is located outside of the first housing and the second housing, the connecting portion is located between the contact surfaces of the first housing and the second housing, the pre-contact portions of the first conductor and the second conductor are located on the second housing in an insulated non-contact manner, and the energizing source receives the energizing signal to drive the piston to bring the pre-contact portions of the first conductor and the second conductor located in the first housing into conductive contact.
  3. 3. The high contact reliability energized closer of claim 2 wherein the piston is supported within the first housing by a first conductor precontact.
  4. 4. The high contact reliability energized closer of claim 2 wherein a limit structure is provided on the first conductor pre-contact and the second housing to limit the initial position of the first conductor pre-contact.
  5. 5. The high contact reliability energized closer of claim 2 wherein the precontacted end face of the first conductor is provided with a saw tooth structure.
  6. 6. The high contact reliability energized closer of claim 2 wherein an energy absorbing rib is disposed transversely between the second conductor precontact and the bottom of the second housing, the energy absorbing rib and the second conductor precontact remaining in a gap therebetween, the precontact of the first conductor being located between the second conductor precontact and the piston, the energizing source receiving the energizing signal to drive the piston to displace, the first conductor precontact to be in conductive contact with the second conductor precontact.
  7. 7. The high contact reliability energized closer of claim 2 wherein the resilient structure is U or V-shaped.
  8. 8. The high contact reliability energized closer of claim 7 wherein the notches of the second conductor precontacted portions are formed by resilient bending of less than 90 ° by which the two sides of the U or V shaped resilient structure are snapped.
  9. 9. The high contact reliability energized closer of claim 6 wherein the front end of the precontacted portion of the second conductor is bent to form a stop portion that is disposed through a gap between the energy absorbing rib end and the second housing wall.
  10. 10. The high-contact-reliability excitation closer according to claim 2, wherein the second housing is provided with a communicating limit groove on the outer side surface and the opposite sides of the end surface of the second housing, the first conductor and the second conductor are respectively located in the limit groove, and a positioning structure for positioning the first conductor and the second conductor is arranged in the limit groove.
  11. 11. The high contact reliability energized closer according to any of the claims 1 to 10, wherein the first housing and the second housing are provided with mating fitting bosses and fitting grooves at their contact.
  12. 12. The high contact reliability energized closer according to any of the claims 1 to 10, wherein limit cams are provided in the first housing for pressing the first and second conductors on the second housing wall, respectively.
  13. 13. The high contact reliability energized closer according to any one of claims 1 to 10, wherein a vent hole is provided in an end face of the second housing located in the first housing.
  14. 14. The high contact reliability energized closer according to any of the claims 1 to 10, wherein a grill through hole is provided in the bottom of the second housing.

Description

High contact reliability sexually activated closure Technical Field The invention relates to the field of electric power control and electric automobiles, in particular to electric energy release protection of an energy storage element component after the main circuit of an electric fault is cut off. Background Besides the traditional hot-melt fuse, the main loop protection device of the battery pack of the electric vehicle has a structure (namely an exciting device) for rapidly cutting off an opening and gradually expanding the application range, can rapidly realize the function from normally closed to normally open of an electric switch, overcomes the defects of the traditional fuse, and has the advantages of small power consumption (small heating value), small volume and weight, good current impact resistance, quick breaking time and the like. The main circuit of the battery pack is connected with a plurality of electrical elements including an inductor, a capacitor, a motor and the like, and when the main circuit of the battery pack has fault current, the fault current can be cut off by means of a hot melt fuse or an excitation device to disconnect the battery pack from the main circuit. However, the devices such as an inductor, a capacitor, a motor and the like in the external circuit of the battery pack also store certain electric energy which is not released yet, so that potential safety hazards are caused to subsequent operation and repair of personnel. At present, after a main loop circuit of a battery pack of an electric vehicle is cut off, a corresponding protection device does not appear in quick release of residual electric energy of an energy storage component, the potential safety hazard of the residual electric energy is not negligible, and based on the requirement, an excitation closer is provided, and the normally open to normally closed function of the circuit can be quickly realized. The excitation closer is connected to the grounding path of the main loop of the electric vehicle and is in parallel connection with the battery pack. When the battery pack works normally, the grounding branch is in a normally open state, and when the main circuit has fault current and is cut off, the exciting device of the normally open switching normally closed circuit acts immediately to quickly connect the grounding branch, and the electric energy of the energy storage component in the main circuit is released, so that the follow-up operation safety is ensured. Disclosure of Invention The invention aims to provide an excitation closer with high contact reliability, which is characterized in that an excitation source drives a piston to enable a first conductor and a second conductor to be in conductive contact and match with an excitation fuse, so that the electric energy of a load in a circuit can be released, and the first shell and the second shell are nested, so that the shell structure is more compact and the volume is smaller. The high-contact-reliability excitation closer comprises a first shell, a second shell, an excitation source, a piston, a first conductor and a second conductor, wherein the second shell is arranged in the first shell, the first conductor and the second conductor are arranged in an insulating mode, the first conductor and the second conductor penetrate through contact surfaces of the first shell and the second shell respectively, one end of the first conductor is positioned outside the shell, the other end of the second conductor is arranged on the second shell in the first shell in an insulating non-contact mode, and the excitation source receives an excitation signal to drive the piston to enable the first conductor and the second conductor in the first shell to be in conductive contact. The first conductor and the second conductor respectively comprise a pre-contact part, a connecting part and a conducting part, the connecting part is in conductive connection with the pre-contact part and the conducting part, the pre-contact part and the connecting part are in bending relation, the conducting part is positioned outside the first shell and the second shell, the connecting part is positioned between the contact surfaces of the first shell and the second shell, the pre-contact parts of the first conductor and the second conductor are positioned on the second shell in an insulating non-contact mode, and the excitation source receives an excitation signal to drive the piston to enable the pre-contact parts of the first conductor and the second conductor positioned in the first shell to be in conductive contact. Preferably, the piston is supported within the first housing by a first conductor precontact. Preferably, a limiting structure for limiting the initial position of the first conductor pre-contact part is cooperatively arranged on the first conductor pre-contact part and the second shell. Preferably, the precontacted end surface of the first conductor is provided with a sa