CN118589232B - Connector and connector assembly - Google Patents

Abstract

The invention discloses a connector and a connector assembly. The connector includes: a housing having an installation opening; a power terminal disposed in the housing for electrical connection to a high voltage load circuit; a threaded fastener for fastening the power terminal to a mating power terminal of a mating connector; two signal terminals disposed in the housing; a cover movable between an open position to open the mounting port and a closed position to close the mounting port; and mating signal terminals disposed in the cover. When the cover is moved from the open position to the closed position, the mating signal terminals are moved from a separated position electrically separated from the two signal terminals to a bridging position bridging the two signal terminals; the high voltage load loop is energized after the mating signal terminal is moved to the bridging position and is de-energized after the mating signal terminal is moved to the separating position. The invention can simplify the structure of the connector, reduce the volume of the connector and improve the use safety.

Description

Connector and connector assembly

Technical Field

The present invention relates to a connector and a connector assembly including the same.

Background

In the prior art, high voltage connectors generally include a housing and power and signal terminals disposed in the housing. The power supply terminal is used for being electrically connected to the high-voltage load loop, and the signal terminal is used for being electrically connected to the low-voltage control loop. The low voltage control loop is used for controlling the power on and power off of the high voltage load loop. The high voltage load circuit is energized after the low voltage control circuit is turned on and the high voltage load circuit is de-energized after the low voltage control circuit is turned off. In the prior art, this low pressure control loop is commonly referred to as a high pressure interlock loop or simply HVIL (Hazardous Voltage Interlock Loop or High Voltage Interlock Loop). The high voltage interlock circuit is mainly used for preventing live working, such as live fastening of power terminals of two high voltage power connectors, live separation of the power terminals of the two high voltage power connectors, and the like. In this way, the use safety can be improved, and for example, electric shock accidents and arc ablation problems can be prevented.

In the prior art, when the high voltage connector is mated with the mating connector, the signal terminal of the high voltage connector is mated with the mating signal terminal in the mating connector to switch on the low voltage control loop and control the power supply to supply power to the high voltage load loop through the low voltage control loop. In the prior art, since the signal terminals and the mating signal terminals are provided in the two connectors, respectively, this results in an uncomplicated structure and a large volume.

Furthermore, in the prior art, during the operation of the threaded fastener to fasten the power supply terminal of the high voltage connector and the counter power supply terminal of the counter connector, there is a risk that the signal terminal is accidentally moved to a position to be counter-matched with the counter signal terminal, which may cause the high voltage load circuit to be accidentally energized, thereby causing a live operation.

Disclosure of Invention

The present invention is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.

According to one aspect of the present invention, a connector is provided. The connector includes: a housing having an installation opening; a power terminal disposed in the housing for electrical connection to a high voltage load circuit; a threaded fastener adapted to be tightened or loosened by a tool extending into the mounting port for fastening the power terminal to a mating power terminal of a mating connector; two signal terminals disposed in the housing; a cover movable between an open position to open the mounting port and a closed position to close the mounting port; and mating signal terminals disposed in the cover. When the cover is moved from the open position to the closed position, the mating signal terminals are moved from a separated position electrically separated from the two signal terminals to a bridging position bridging the two signal terminals; the high voltage load loop is energized after the counter signal terminal is moved to the bridging position and is de-energized after the counter signal terminal is moved to the separating position.

According to an exemplary embodiment of the invention, the cover is movable from the open position to the closed position after the power terminals and the pair of power terminals are fastened together by the threaded fastener.

According to another exemplary embodiment of the present invention, the threaded fastener is adapted to move between a pre-assembled position for releasing the power terminal and the pair of power supply terminals and a final assembled position for fastening the power terminal and the pair of power supply terminals; when the threaded fastener is in the pre-load position, the threaded fastener is in a position to interfere with the cover to prevent the cover from being moved to the closed position before the power terminals are secured to the pair of power distribution power terminals.

According to another exemplary embodiment of the present invention, a pre-lock structure is formed in the housing, the pre-lock structure being adapted to engage with the flange portion of the threaded fastener to pre-lock the threaded fastener in the pre-load position.

According to another exemplary embodiment of the present invention, the pre-lock structure includes: an upper resilient clip adapted to rest on an upper side of the flange portion of the threaded fastener; and a lower resilient catch adapted to bear against the underside of the flange portion of the threaded fastener. When the threaded fastener is in the pre-load position, the flange portion of the threaded fastener is clamped between the upper and lower resilient catches such that the threaded fastener is pre-locked in the pre-load position.

According to another exemplary embodiment of the present invention, the cover is detachably mounted to the housing and is rotatable relative to the housing between the open position and the closed position.

According to another exemplary embodiment of the present invention, a connection part is formed at one side of the cover, and the connection part is movably connected with the housing such that the cover can be rotated between the open position and the closed position with respect to the housing.

According to another exemplary embodiment of the invention, a catch is formed on the cover, a projection is formed on the housing, the projection being adapted to engage into a catch groove of the catch; the protrusion is engaged into the catch slot of the catch when the lid is in the closed position to lock the lid in the closed position.

According to another exemplary embodiment of the present invention, the connector further includes: and a sealing ring sleeved on the outer peripheral wall of the cover and suitable for being pressed between the outer peripheral wall of the cover and the inner peripheral wall of the mounting opening of the shell. When the cover is in the closed position, the seal ring is compressed between the outer peripheral wall of the cover and the inner peripheral wall of the mounting opening of the housing to achieve a seal therebetween.

According to another exemplary embodiment of the present invention, the connector further includes: and the two signal cables are respectively and electrically connected with the two signal terminals, are led out from the shell and are used for being electrically connected to a low-voltage control loop, and the low-voltage control loop is used for controlling the power on and power off of the high-voltage load loop.

According to another exemplary embodiment of the present invention, the connector further includes: and an insulator for holding the two signal terminals, a slot being formed in the housing, the insulator being detachably inserted into the slot.

According to another exemplary embodiment of the present invention, the insulator, the two signal terminals and the two signal cables are preassembled together to constitute one single signal module, which is detachably mounted in the housing.

According to another exemplary embodiment of the present invention, a mating portion adapted to be inserted into the slot of the housing is formed at an inner side of the cover, and an inner cavity adapted to be mated with one end of the insulator is formed in the mating portion; the mating signal terminals are fixedly disposed in the mating portion of the cover and are adapted to be inserted into the insulator to make electrical contact with two signal terminals in the insulator.

According to another exemplary embodiment of the present invention, two mounting holes are formed in the insulator, and the two signal terminals are respectively inserted into the two mounting holes of the insulator; and/or a mounting groove is formed in the mating part of the cover, and the mating signal terminal is inserted into the mounting groove in an interference fit manner.

According to another exemplary embodiment of the present invention, the power terminal has a first connection end in the housing, and a connection hole allowing the threaded fastener to pass therethrough is formed on the first connection end of the power terminal so that the power terminal can be fastened to the pair of power distribution power terminals by the threaded fastener.

According to another exemplary embodiment of the present invention, the power terminal further has a second connection end located outside the housing, the second connection end of the power terminal being for electrical connection to the high voltage load circuit.

According to another exemplary embodiment of the present invention, a connection nut is fixed on the second connection end of the power terminal, so that the second connection end of the power terminal can be fastened to the connection terminal of the high voltage load circuit by a bolt screwed with the connection nut.

According to another exemplary embodiment of the present invention, the connector comprises two power terminals and two threaded fasteners for fastening the two power terminals to two pair of power distribution power terminals of the mating connector, respectively.

According to another aspect of the present invention, a connector assembly is provided. The connector assembly includes: the connector; and a mating connector mated with the connector. The mating connector includes: a mating housing; a mating power distribution source terminal arranged in the mating housing; and a nut disposed in the mating housing, a threaded fastener of the connector passing through the power supply terminal and the pair of power distribution source terminals and being threaded with the nut to fasten the power supply terminal and the pair of power distribution source terminals together.

According to another exemplary embodiment of the present invention, the mating connector further includes: and the cable is electrically connected with the pair of power distribution source terminals. The cable is led out of the mating housing for electrical connection to a high voltage load circuit.

According to another aspect of the present invention, a connector is provided. The connector includes: a housing; a power terminal disposed in the housing for electrical connection to a high voltage load circuit; two signal terminals disposed in the housing; a moving member movable between a first position and a second position relative to the housing; and an opposite signal terminal provided in the moving member. When the moving member is moved from the first position to the second position, the mating signal terminal is moved from a separated position electrically separated from the two signal terminals to a bridging position bridging the two signal terminals; the high voltage load loop is energized after the counter signal terminal is moved to the bridging position and is de-energized after the counter signal terminal is moved to the separating position.

According to an exemplary embodiment of the invention, the moving part is a separate part from the housing, which is movable from a first position separated from the housing to a second position engaged with the housing.

According to another exemplary embodiment of the present invention, the moving part is movably connected to the housing, being movable between the first position and the second position.

According to another exemplary embodiment of the present invention, the moving member and the housing are integrally formed, and a flexible connection is provided between the moving member and the housing, such that the moving member is movable between the first position and the second position.

In the foregoing respective exemplary embodiments according to the present invention, the signal terminal and the counter signal terminal for controlling the energization and the de-energization of the high voltage load circuit are provided in the same connector, and therefore, the structure of the connector and the counter connector can be simplified, and the volumes of the connector and the counter connector can be reduced.

Furthermore, in the foregoing respective exemplary embodiments according to the present invention, the cover must be in the open position when the threaded fastener is operated through the mounting port of the housing, so that the mating signal terminal can be prevented from being accidentally moved to the bridging position bridging the two signal terminals when the threaded fastener is operated. Therefore, the invention can ensure that the high-voltage load loop is powered off when the threaded fastener is operated, thereby effectively avoiding live operation and improving the use safety.

Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.

Drawings

Fig. 1 shows a schematic perspective view of a connector according to an exemplary embodiment of the invention, with a cover in an open position;

FIG. 2 shows a cross-sectional view of a connector according to an exemplary embodiment of the invention with a cover in an open position;

Fig. 3 shows a schematic perspective view of a signal module and a cover of a connector according to an exemplary embodiment of the invention, wherein the cover is in an open position;

Fig. 4 shows a cross-sectional view of a signal module and a cover of a connector according to an exemplary embodiment of the invention, wherein the cover is in an open position;

Fig. 5 shows a schematic perspective view of two signal terminals and a mating signal terminal of a connector according to an exemplary embodiment of the invention, wherein the mating signal terminal is in a separated position electrically separated from the two signal terminals;

FIG. 6 shows a cross-sectional view of a connector and counter connector with a threaded fastener in a pre-load position and a cover in an open position according to an exemplary embodiment of the present invention;

FIG. 7 shows a cross-sectional view of a connector and counter connector with a threaded fastener in a final installed position securing together a power terminal and a counter power terminal according to an exemplary embodiment of the present invention;

fig. 8 shows a schematic perspective view of a connector and counter connector according to an exemplary embodiment of the invention, wherein the power terminals and the counter power terminals are fastened together, the cover being in a closed position;

Fig. 9 shows a cross-sectional view of a connector and counter connector according to an exemplary embodiment of the invention, wherein the power terminals and the counter power terminals are fastened together, the cover being in a closed position;

Fig. 10 shows a schematic perspective view of two signal terminals and a mating signal terminal of a connector according to an exemplary embodiment of the invention, wherein the mating signal terminal is in a bridging position bridging the two signal terminals.

Detailed Description

The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

According to one general technical concept of the present invention, a connector is provided. The connector includes: a housing having an installation opening; a power terminal disposed in the housing for electrical connection to a high voltage load circuit; a threaded fastener adapted to be tightened or loosened by a tool extending into the mounting port for fastening the power terminal to a mating power terminal of a mating connector; two signal terminals disposed in the housing; a cover movable between an open position to open the mounting port and a closed position to close the mounting port; and mating signal terminals disposed in the cover. When the cover is moved from the open position to the closed position, the mating signal terminals are moved from a separated position electrically separated from the two signal terminals to a bridging position bridging the two signal terminals; the high voltage load loop is energized after the counter signal terminal is moved to the bridging position and is de-energized after the counter signal terminal is moved to the separating position.

According to another general technical concept of the present invention, a connector assembly is provided. The connector assembly includes: the connector; and a mating connector mated with the connector. The mating connector includes: a mating housing; a mating power distribution source terminal arranged in the mating housing; and a nut disposed in the mating housing, a threaded fastener of the connector passing through the power supply terminal and the pair of power distribution source terminals and being threaded with the nut to fasten the power supply terminal and the pair of power distribution source terminals together.

Fig. 1 shows a schematic perspective view of a connector 100 according to an exemplary embodiment of the invention, wherein the cover 2 is in an open position; fig. 2 shows a cross-sectional view of a connector 100 according to an exemplary embodiment of the invention, wherein the cover 2 is in an open position; fig. 3 shows a schematic perspective view of the signal module 3 and the cover 2 of the connector 100 according to an exemplary embodiment of the invention, wherein the cover 2 is in an open position; fig. 4 shows a cross-sectional view of the signal module 3 and the cover 2 of the connector 100 according to an exemplary embodiment of the invention, wherein the cover 2 is in an open position; fig. 5 shows a schematic perspective view of two signal terminals 31 and a mating signal terminal 41 of a connector 100 according to an exemplary embodiment of the present invention, wherein the mating signal terminal 41 is in a separated position electrically separated from the two signal terminals 31; fig. 6 shows a cross-sectional view of the connector 100 and counter connector 200 according to an exemplary embodiment of the invention, with the threaded fastener 6 in a pre-assembled position and the cover 2 in an open position; fig. 7 shows a cross-sectional view of connector 100 and counter connector 200 according to an exemplary embodiment of the present invention, with threaded fastener 6 in a final installed position securing power terminal 5 and counter power terminal 5' together; fig. 8 shows a schematic perspective view of a connector 100 and a counter connector 200 according to an exemplary embodiment of the invention, wherein the power terminals 5 and the counter power terminals 5' are fastened together, the cover 2 being in a closed position; fig. 9 shows a cross-sectional view of a connector 100 and a counter connector 200 according to an exemplary embodiment of the invention, wherein the power terminals 5 and the counter power terminals 5' are fastened together, the cover 2 being in a closed position; fig. 10 shows a schematic perspective view of two signal terminals 31 and a mating signal terminal 41 of a connector 100 according to an exemplary embodiment of the invention, wherein the mating signal terminal 41 is in a bridging position bridging the two signal terminals 31.

As shown in fig. 1-10, in one exemplary embodiment of the present invention, a connector 100 is disclosed. The connector 100 includes: a housing 1, a power supply terminal 5, a threaded fastener 6, two signal terminals 31, a cover 2 and a mating signal terminal 41. The housing 1 has a mounting port 101. A power terminal 5 is provided in the housing 1 for electrical connection to a high voltage load circuit (not shown). The threaded fastener 6 is adapted to be tightened or loosened by a tool (not shown) extending into the mounting port 101 for fastening the power terminal 5 to the mating power terminal 5' of the mating connector 200. Two signal terminals 31 are provided in the housing 1. The cover 2 is movable between an open position that opens the mounting port 101 and a closed position that closes the mounting port 101. The mating signal terminal 41 is provided in the cover 2.

As shown in fig. 1 to 10, in the illustrated embodiment, when the cover 2 is moved from the open position to the closed position, the counterpart signal terminal 41 is moved from a separate position electrically separated from the two signal terminals 31 to a bridging position bridging the two signal terminals 31. The high voltage load circuit is energized after the counter signal terminal 41 is moved to the bridging position bridging the two signal terminals 31, and the high voltage load circuit is de-energized after the counter signal terminal 41 is moved to the separating position electrically separated from the two signal terminals 31.

As shown in fig. 1-10, in the illustrated embodiment, the cover 2 is not moved from the open position to the closed position until after the power terminals 5 and the pair of power terminals 5' are fastened together by the threaded fasteners 6.

As shown in fig. 1 to 10, in the illustrated embodiment, the threaded fastener 6 is adapted to move between a pre-assembled position (the position shown in fig. 6) for releasing the power terminal 5 and for securing the power terminal 5 and a final assembled position (the position shown in fig. 7) for the power terminal 5'. When the threaded fastener 6 is in the pre-installed position, the threaded fastener 6 is in a position to interfere with the cover 2 to prevent the cover 2 from being moved to the closed position before the power terminal 5 is fastened to the power terminal 5'.

As shown in fig. 1-10, in the illustrated embodiment, a pre-lock structure is formed in the housing 1, the pre-lock structure being adapted to engage with the flange portion 61 of the threaded fastener 6 to pre-lock the threaded fastener 6 in the pre-load position.

As shown in fig. 1 to 10, in the illustrated embodiment, the pre-lock structure includes: an upper elastic buckle 16a and a lower elastic buckle 16b. The upper resilient catch 16a is adapted to abut against the upper side of the flange portion 61 of the threaded fastener 6. The lower resilient catch 16b is adapted to abut against the underside of the flange portion 61 of the threaded fastener 6. When the threaded fastener 6 is in the pre-load position, the flange portion 61 of the threaded fastener 6 is clamped between the upper and lower resilient catches 16a, 16b such that the threaded fastener 6 is pre-locked in the pre-load position.

As shown in fig. 1 to 10, in the illustrated embodiment, the cover 2 is detachably mounted to the housing 1 and is rotatable relative to the housing 1 between an open position and a closed position.

As shown in fig. 1 to 10, in the illustrated embodiment, a connection portion 21 is formed at one side of the cover 2, and the connection portion 21 is movably connected with the housing 1 so that the cover 2 can be rotated between an open position and a closed position with respect to the housing 1.

As shown in fig. 1 to 10, in the illustrated embodiment, a catch 22 is formed on the lid 2, and a projection 12 is formed on the housing 1, the projection 12 being adapted to engage into a catch groove of the catch 22. When the lid 2 is in the closed position, the projections 12 are engaged into the detents of the catch 22 to lock the lid 2 in the closed position.

As shown in fig. 1 to 10, in the illustrated embodiment, the connector 100 further comprises a sealing ring 25, the sealing ring 25 being fitted over the outer peripheral wall of the cover 2 and adapted to be pressed between the outer peripheral wall of the cover 2 and the inner peripheral wall of the mounting opening 101 of the housing 1. When the lid 2 is in the closed position, the gasket 25 is pressed between the outer peripheral wall of the lid 2 and the inner peripheral wall of the mounting opening 101 of the housing 1 to achieve a seal therebetween.

As shown in fig. 1 to 10, in the illustrated embodiment, the connector 100 further includes two signal cables 32, and the two signal cables 32 are electrically connected to the two signal terminals 31, respectively. Two signal cables 32 are led out of the housing 1 for electrical connection to a low voltage control loop (not shown) for controlling the energizing and de-energizing of the high voltage load loop.

As shown in fig. 1 to 10, in the illustrated embodiment, the connector 100 further includes an insulator 33, the insulator 33 being for holding the two signal terminals 31. A slot 13 is formed in the housing 1, and an insulator 33 is detachably inserted into the slot 13.

As shown in fig. 1 to 10, in the illustrated embodiment, the insulator 33, the two signal terminals 31, and the two signal cables 32 are preassembled to constitute one single signal module 3, and the signal module 3 is detachably mounted in the housing 1.

As shown in fig. 1 to 10, in the illustrated embodiment, a mating portion 23 adapted to be inserted into the slot 13 of the housing 1 is formed at the inner side of the cover 2, and an inner cavity 24 adapted to be mated with one end of the insulator 33 is formed in the mating portion 23. The mating signal terminals 41 are fixedly disposed in the mating portion 23 of the cover 2 and are adapted to be inserted into the insulator 33 to make electrical contact with the two signal terminals 31 in the insulator 33.

As shown in fig. 1 to 10, in the illustrated embodiment, two mounting holes are formed in the insulator 33, and two signal terminals 31 are inserted into the two mounting holes of the insulator 33, respectively. A fitting groove is formed in the mating portion 23 of the cover 2, into which the mating signal terminal 41 is inserted with an interference fit.

As shown in fig. 1 to 10, in the illustrated embodiment, the power terminal 5 has a first connection end 5a located in the housing 1, and a connection hole allowing a threaded fastener 6 to pass through is formed on the first connection end 5a of the power terminal 5 so that the power terminal 5 can be fastened to the opposite power terminal 5' by the threaded fastener 6.

As shown in fig. 1 to 10, in the illustrated embodiment, the power terminal 5 further has a second connection end 5b located outside the housing 1, the second connection end 5b of the power terminal 5 being for electrical connection to a high voltage load circuit.

As shown in fig. 1 to 10, in the illustrated embodiment, a connection nut 5c is fixed on the second connection end 5b of the power terminal 5 such that the second connection end 5b of the power terminal 5 can be fastened to the connection terminal of the high voltage load circuit by a bolt screwed with the connection nut 5 c.

As shown in fig. 1-10, in the illustrated embodiment, the connector includes two power terminals 5 and two threaded fasteners 6, the two threaded fasteners 6 being used to fasten the two power terminals 5 to two power distribution terminals 5' of the mating connector 200, respectively.

In another exemplary embodiment of the present invention, as shown in fig. 1-10, a connector assembly is also disclosed. The connector assembly includes: a connector 100 and a counter connector 200. The mating connector 200 mates with the connector 100. The mating connector 200 includes: a mating housing 7, a mating power distribution source terminal 5' and a nut 8. The mating power supply terminal 5' is arranged in the mating housing 7. A nut 8 is provided in the mating housing 7. The threaded fastener 6 of the connector passes through the power terminal 5 and the pair of power terminals 5 'and is threaded with the nut 8 to fasten the power terminal 5 and the pair of power terminals 5' together.

As shown in fig. 1-10, in the illustrated embodiment, the counter connector 200 further includes a cable 9, the cable 9 being electrically connected to the counter power supply terminal 5'. A cable 9 leads from the mating housing 7 for electrical connection to a high voltage load circuit.

Although not shown, in another exemplary embodiment of the present invention, a connector is also disclosed. The connector includes: the housing 1, the power supply terminal 5, the two signal terminals 31, a moving member (not shown), and the mating signal terminal 41. A power terminal 5 is provided in the housing 1 for electrical connection to a high voltage load circuit (not shown). Two signal terminals 31 are provided in the housing 1. A moving member (such as, but not limited to, the illustrated cover 2) is movable relative to the housing 1 between a first position and a second position. The mating signal terminal 41 is provided in the moving member. When the moving member is moved from the first position to the second position, the mating signal terminal 41 is moved from the separated position electrically separated from the two signal terminals 31 to the bridging position bridging the two signal terminals 31. The high voltage load loop is energized after the counter signal terminal 41 is moved to the bridging position and is de-energized after the counter signal terminal 41 is moved to the separating position.

Although not illustrated, in another exemplary embodiment of the present invention, the moving member is a separate member separated from the housing 1, and is movable from a first position separated from the housing 1 to a second position engaged with the housing 1.

Although not shown, in another exemplary embodiment of the invention, a moving member is movably coupled to the housing 1, capable of moving between a first position and a second position.

Although not shown, in another exemplary embodiment of the present invention, the moving member is integrally formed with the housing 1, and there is a flexible connection between the moving member and the housing 1 so that the moving member can move between the first position and the second position.

It will be appreciated by those skilled in the art that the above-described embodiments are exemplary and that modifications may be made to the embodiments described in various embodiments without structural or conceptual aspects and that these variations may be resorted to without departing from the scope of the invention.

Although the present invention has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the invention and are not to be construed as limiting the invention.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and that the word "a" or "an" does not exclude a plurality. In addition, any element numbers of the claims should not be construed as limiting the scope of the invention.

Claims (24)

1. A connector, comprising: The housing (1) has a mounting opening (101); A power terminal (5), arranged in the housing (1) and used for being electrically connected to a high-voltage load circuit; a threaded fastener (6) adapted to be tightened or loosened by a tool inserted into the mounting opening (101), and used to fasten the power terminal (5) to a mating power terminal (5') of a mating connector (200); Two signal terminals (31) are arranged in the housing (1); a cover (2) capable of moving between an open position for opening the installation opening (101) and a closed position for closing the installation opening (101); and A matching signal terminal (41) is arranged in the cover (2), When the cover (2) is moved from the open position to the closed position, the mating signal terminal (41) is moved from a separated position electrically separated from the two signal terminals (31) to a bridging position bridging the two signal terminals (31). The high-voltage load circuit is energized after the matching signal terminal (41) is moved to the bridging position, and is de-energized after the matching signal terminal (41) is moved to the separated position. 2. The connector according to claim 1, characterized in that: The cover (2) can be moved from the open position to the closed position only after the power terminal (5) and the mating power terminal (5') are fastened together by the threaded fastener (6). 3. The connector according to claim 2, characterized in that: The threaded fastener (6) is suitable for moving between a pre-installation position for loosening the power terminal (5) and the mating power terminal (5') and a final installation position for fastening the power terminal (5) and the mating power terminal (5'); When the threaded fastener (6) is in the pre-installed position, the threaded fastener (6) is in a position interfering with the cover (2) to prevent the cover (2) from being moved to the closed position before the power terminal (5) is fastened to the mating power terminal (5'). 4. The connector according to claim 3, characterized in that: A pre-locking structure is formed in the housing (1), the pre-locking structure being suitable for engaging with a flange portion (61) of the threaded fastener (6) to pre-lock the threaded fastener (6) in the pre-installed position. 5. The connector according to claim 4, characterized in that: The pre-locking structure comprises: An upper elastic buckle (16a) adapted to abut against an upper side of a flange portion (61) of the threaded fastener (6); and A lower elastic buckle (16b) adapted to abut against the lower side of the flange portion (61) of the threaded fastener (6), When the threaded fastener (6) is in the pre-installed position, the flange portion (61) of the threaded fastener (6) is clamped between the upper elastic buckle (16a) and the lower elastic buckle (16b), so that the threaded fastener (6) is pre-locked in the pre-installed position. 6. The connector according to claim 1, characterized in that: The cover (2) is detachably mounted on the housing (1) and is rotatable relative to the housing (1) between the open position and the closed position. 7. The connector according to claim 1, characterized in that: A connecting portion (21) is formed on one side of the cover (2), and the connecting portion (21) is movably connected to the shell (1), so that the cover (2) can rotate relative to the shell (1) between the open position and the closed position. 8. The connector according to claim 1, characterized in that: A buckle (22) is formed on the cover (2), and a protrusion (12) is formed on the housing (1), wherein the protrusion (12) is suitable for engaging with a slot of the buckle (22); When the cover (2) is in the closed position, the protrusion (12) is engaged in the slot of the buckle (22) to lock the cover (2) in the closed position. 9. The connector according to claim 1, further comprising: A sealing ring (25) is sleeved on the outer peripheral wall of the cover (2) and is suitable for being squeezed between the outer peripheral wall of the cover (2) and the inner peripheral wall of the installation opening (101) of the housing (1). When the cover (2) is in the closed position, the sealing ring (25) is squeezed between the outer peripheral wall of the cover (2) and the inner peripheral wall of the mounting opening (101) of the housing (1) to achieve sealing between the two. 10. The connector according to claim 1, further comprising: Two signal cables (32) are electrically connected to the two signal terminals (31) respectively. The two signal cables (32) are led out from the housing (1) and are used to be electrically connected to a low-voltage control circuit, and the low-voltage control circuit is used to control the power on and power off of the high-voltage load circuit. 11. The connector according to claim 10, further comprising: an insulator (33) for holding the two signal terminals (31), A slot (13) is formed in the housing (1), and the insulator (33) is detachably inserted into the slot (13). 12. The connector according to claim 11, characterized in that: The insulator (33), the two signal terminals (31) and the two signal cables (32) are pre-assembled together to form a separate signal module (3); the signal module (3) is detachably mounted in the housing (1). 13. The connector according to claim 11, characterized in that: A mating portion (23) suitable for being inserted into the slot (13) of the housing (1) is formed on the inner side of the cover (2), and an inner cavity (24) suitable for being matched with one end of the insulator (33) is formed in the mating portion (23); The mating signal terminal (41) is fixedly arranged in the mating portion (23) of the cover (2) and is suitable for being inserted into the insulator (33) to electrically contact the two signal terminals (31) in the insulator (33). 14. The connector according to claim 13, characterized in that: Two mounting holes are formed in the insulator (33), and the two signal terminals (31) are respectively inserted into the two mounting holes of the insulator (33); and/or A mounting groove is formed in the mating portion (23) of the cover (2), and the mating signal terminal (41) is inserted into the mounting groove in an interference fit manner. 15. The connector according to claim 1, characterized in that: The power terminal (5) has a first connection end (5a) located in the housing (1), and a connection hole is formed on the first connection end (5a) of the power terminal (5) for allowing the threaded fastener (6) to pass through, so that the power terminal (5) can be fastened to the mating power terminal (5') by the threaded fastener (6). 16. The connector according to claim 15, characterized in that: The power terminal (5) also has a second connection end (5b) located outside the housing (1), and the second connection end (5b) of the power terminal (5) is used to be electrically connected to the high-voltage load circuit. 17. The connector according to claim 16, characterized in that: A connecting nut (5c) is fixed to the second connecting end (5b) of the power terminal (5), so that the second connecting end (5b) of the power terminal (5) can be fastened to the connecting terminal of the high-voltage load circuit by means of a bolt threadedly connected to the connecting nut (5c). 18. The connector according to claim 1, characterized in that: The connector comprises two power terminals (5) and two threaded fasteners (6), wherein the two threaded fasteners (6) are used to respectively fasten the two power terminals (5) to two mating power terminals (5') of the mating connector (200). 19. A connector assembly, comprising: The connector (100) according to any one of claims 1 to 18; and A mating connector (200) is mated with the connector (100), The mating connector (200) comprises: A matching housing (7); A mating power terminal (5') is arranged in the mating housing (7); and A nut (8) is arranged in the matching housing (7). The threaded fastener (6) of the connector passes through the power terminal (5) and the mating power terminal (5') and is threadedly connected to the nut (8) to fasten the power terminal (5) and the mating power terminal (5') together. 20. The connector assembly according to claim 19, wherein: The mating connector (200) further comprises: The cable (9) is electrically connected to the matching power terminal (5'). The cable (9) is led out from the matching housing (7) and is used for being electrically connected to a high-voltage load circuit. 21. A connector, comprising: Housing (1); A power terminal (5), arranged in the housing (1) and used for being electrically connected to a high-voltage load circuit; Two signal terminals (31) are arranged in the housing (1); a moving member capable of moving relative to the housing (1) between a first position and a second position; and A matching signal terminal (41) is arranged in the moving component, When the moving component is moved from the first position to the second position, the matching signal terminal (41) is moved from a separated position electrically separated from the two signal terminals (31) to a bridge position bridging the two signal terminals (31). The high-voltage load circuit is energized after the matching signal terminal (41) is moved to the bridging position, and is de-energized after the matching signal terminal (41) is moved to the separated position. 22. The connector according to claim 21, characterized in that: The moving component is an independent component separated from the housing (1), and is capable of moving from a first position separated from the housing (1) to a second position engaged with the housing (1). 23. The connector according to claim 21, characterized in that: The moving component is movably connected to the housing (1) and is capable of moving between the first position and the second position. 24. The connector according to claim 21, characterized in that: The moving component and the housing (1) are integrally formed, and a flexible connection portion is provided between the moving component and the housing (1), so that the moving component can move between the first position and the second position.