Switch device, distribution box, and vehicle

Abstract

A switch device, a distribution box, and a vehicle. The switch device comprises a first switch unit and a second switch unit. The first switch unit comprises a first moving contact assembly, a first static contact assembly and a first driving assembly. The first driving assembly is drivingly connected to the first moving contact assembly. The second switch unit comprises a second moving contact assembly, a second static contact assembly, and a second driving assembly. The second driving assembly is drivingly connected to the second moving contact assembly. The distribution box comprises the switch device. The vehicle comprises the switch device or the distribution box.

Description

Switching device, distribution box and vehicle

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410698943.X, filed on May 30, 2024, and entitled “Switching device, distribution box and vehicle”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the electrical technical field, in particular, to a switching device, a distribution box and a vehicle. BACKGROUND

[0004] In a vehicle distribution box, a switching device can be used to simultaneously control the on-off of positive and negative lines in the same circuit, and two sets of contact assemblies in the switching device control the positive and negative lines in the same circuit respectively. In the related technology, when one of the two sets of contact assemblies is stuck and cannot break the line, the entire switching device cannot work normally, and the circuit where the switching device is located is always live, which affects the normal operation of the distribution box. SUMMARY

[0005] The purpose of the present disclosure is to provide a switching device, a distribution box and a vehicle, when one of the two sets of contact assemblies in the switching device is stuck and cannot break, the other set of contact assemblies can still work normally, so that the circuit where the switching device is located can be normally de-energized, to at least partially solve the above problems.

[0006] To achieve the above purpose, the first aspect of the present disclosure provides a switching device, comprising:

[0007] a first switching unit, comprising a first moving contact assembly, a first stationary contact assembly and a first driving assembly, the first driving assembly is drivingly connected with the first moving contact assembly, for driving the first moving contact assembly to move in the direction towards or away from the first stationary contact assembly; and

[0008] a second switching unit, comprising a second moving contact assembly, a second stationary contact assembly and a second driving assembly, the second driving assembly is drivingly connected with the second moving contact assembly, for driving the second moving contact assembly to move in the direction towards or away from the second stationary contact assembly;

[0009] The first switching unit and the second switching unit are respectively used for positive and negative lines, for selectively breaking the positive and negative lines;

[0010] When the first switching unit fails, the on-off of the circuit is realized by the second switching unit.

[0011] Optionally, the switch device further comprises a housing, and the first switch unit and the second switch unit are arranged in the housing.

[0012] Optionally, the housing comprises a base, a middle cover and an upper cover, the base and the middle cover enclose a first accommodating space, the first switch unit is arranged in the first accommodating space, and the middle cover and the upper cover enclose a second accommodating space, and the second switch unit is arranged in the second accommodating space.

[0013] Optionally, the switch device further comprises an arc extinguishing assembly arranged in the housing, and the first switch unit and / or the second switch unit are arc extinguished by the arc extinguishing assembly.

[0014] Optionally, the housing is provided with an opening corresponding to the position of the arc extinguishing assembly, and a plurality of arc separation plates with first through holes are arranged between the opening and the arc extinguishing assembly.

[0015] Optionally, the first through holes on at least two adjacent arc separation plates of the plurality of arc separation plates are staggered.

[0016] Optionally, the arc extinguishing assembly comprises a grid support, a grid group and a gas generating element, the grid group and the gas generating element are arranged in the grid support, and the grid group comprises a plurality of arc extinguishing grids arranged at intervals in a first direction.

[0017] Optionally, the first switch unit and / or the second switch unit further comprises a static arc striking structure and a dynamic arc striking structure; the first static contact assembly and / or the second static contact assembly introduce an electric arc into the arc extinguishing assembly through the static arc striking structure, and the first dynamic contact assembly and / or the second dynamic contact assembly introduce the electric arc into the arc extinguishing assembly through the dynamic arc striking structure.

[0018] Optionally, the first static contact assembly comprises two first connecting terminal assemblies, each first connecting terminal assembly comprises a first connecting terminal body and a first connecting terminal and a first static contact point arranged at two ends of the first connecting terminal body respectively, one end of the static arc striking structure is connected to the first static contact point, the other end of the static arc striking structure is arranged at one side of the grid group and is arranged at intervals with the arc extinguishing grids, and the static arc striking structure is used for arc striking of the first static contact point.

[0019] Optionally, the end of the static arc striking structure away from the first static contact point is connected to the first connecting terminal body at a position close to the first connecting terminal, and is used for shunting the current flowing through the first connecting terminal body.

[0020] Optionally, the switch device further comprises a control unit, the first switch unit further comprises a shunt, the shunt is arranged on the first terminal body, and the shunt, the first driving assembly and the second driving assembly are connected with the control unit.

[0021] Optionally, the first movable contact assembly comprises a first movable contact bridge and two first movable contacts arranged on the first movable contact bridge, the movable arc striking structure comprises a first arc striking part and a second arc striking part, the first arc striking part is connected to the first movable contact, the second arc striking part comprises a first end and a second end, the first end corresponds to one end of the first arc striking part away from the first movable contact and has a gap therebetween, the second end is connected with the first movable contact connected with the first arc striking part, and the second end is located on one side of the grid piece and is arranged in a spaced manner with the arc extinguishing grid piece.

[0022] Optionally, the first end is formed with a bending part, and the bending part is arranged in a corresponding manner with one end of the first arc striking part away from the first movable contact.

[0023] Optionally, the first switch unit further comprises an electrical connector, each first movable contact is connected with the first arc striking part, each first arc striking part has a corresponding second arc striking part, and the electrical connector is used for electrically connecting each second arc striking part.

[0024] Optionally, the first movable contact is connected with the first driving assembly, and the electrical connector is connected with the first driving assembly, so that the first movable contact is connected with the second arc striking part.

[0025] Optionally, the first movable contact assembly further comprises a first connector, a first support and a first elastic member, the first support and the first movable contact bridge are connected through the first elastic member, the first connector is sleeved on the first movable contact bridge and the first support, and the first connector is fixedly connected with the first support or the first movable contact bridge.

[0026] Optionally, the first driving assembly comprises a first push rod, the first support is provided with a first clamping groove, the first clamping groove is matched with the first push rod, and the first clamping groove is used for enabling the first driving assembly to drive the first movable contact assembly to move, the first connector is provided with a first avoiding channel corresponding to the first clamping groove, and the first avoiding channel is used for allowing the first push rod to pass through.

[0027] Optionally, the first driving assembly further comprises a first housing and a first electromagnetic coil for driving the first push rod, the first electromagnetic coil is arranged in the first housing, one end of the first push rod is arranged in a cavity formed by the first electromagnetic coil, and the other end of the first push rod passes through the first housing and is clamped with the first clamping groove.

[0028] Optionally, the electric connector is connected with the first housing, the first housing is connected with the first push rod, the first push rod is movably attached to the inner wall of the first avoiding channel and connected with the first connector, the first connector is connected with the first movable contact bridge, so that the first movable contact is connected through the first movable contact bridge, the first connector, the first push rod, the first housing and the electric connector.

[0029] The second aspect of the present disclosure provides a distribution box comprising the switch device provided by the first aspect of the present disclosure.

[0030] The third aspect of the present disclosure provides a vehicle comprising the switch device provided by the first aspect of the present disclosure or the distribution box provided by the second aspect of the present disclosure.

[0031] By the above technical solution, the switch device comprises a first switch unit and a second switch unit, wherein the first switch unit and the second switch unit can be respectively used for controlling the on-off of the positive line and the negative line, that is, the switch device can simultaneously control the on-off of the positive line and the negative line, and when the switch device is applied to the distribution box, some contactors can be at least partially omitted, the structure of the distribution box is simplified, the volume of the distribution box is reduced, and the manufacturing cost of the distribution box is reduced. Moreover, the first switch unit comprises a first driving assembly for driving the first movable contact assembly to move towards or away from the first static contact assembly, and the second switch unit comprises a second driving assembly for driving the second movable contact assembly to move towards or away from the second static contact assembly, so that when the movable contact of the movable contact assembly of one switch unit and the static contact of the static contact assembly are adhered and cause different implementations of tripping, the other switch unit can be tripped to cut off the power supply, so that the circuit in which the switch device is located can be normally cut off, the distribution box can be normally operated, and the safety is higher.

[0032] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0033] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and together with the following specific embodiments, serve to explain the present disclosure but do not constitute a limitation on the present disclosure. In the drawings:

[0034] FIG. 1 is a schematic diagram of the overall structure of the switch device provided in an exemplary embodiment of the present disclosure;

[0035] Fig. 2 is a schematic view of a structure of a first switch unit provided in a switch device according to an exemplary embodiment of the present disclosure;

[0036] Fig. 3 is a schematic view of a partial structure of the first switch unit according to an exemplary embodiment of the present disclosure;

[0037] Fig. 4 is a schematic view of a structure of an arc extinguishing assembly according to an exemplary embodiment of the present disclosure;

[0038] Fig. 5 is a schematic view of a structure of a first driving assembly according to an exemplary embodiment of the present disclosure;

[0039] Fig. 6 is a schematic view of a structure of the first driving assembly according to an exemplary embodiment of the present disclosure, which is different from the view of Fig. 5;

[0040] Fig. 7 is a sectional view of C-C in Fig. 6 according to an exemplary embodiment of the present disclosure;

[0041] Fig. 8 is a schematic view of a structure of a first movable contact assembly according to an exemplary embodiment of the present disclosure;

[0042] Fig. 9 is a schematic view of a structure of a first bracket according to an exemplary embodiment of the present disclosure;

[0043] Fig. 10 is a schematic view of a structure of a first connecting member according to an exemplary embodiment of the present disclosure;

[0044] Fig. 11 is a schematic view of a structure of a second switch unit and a circuit board according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0046] In the present disclosure, an X direction is provided for the switch device, wherein the X direction is a first direction, and the direction indicated by the arrow is a positive direction of the X direction, and vice versa. In the absence of a contrary indication, "inner and outer" refer to the inner and outer contours of the corresponding components; "far and near" refer to the corresponding structures or components being far away or close to another structure or component. In addition, it should be noted that the terms such as "first", "second" and the like are used to distinguish one element from another.

[0047] A vehicle distribution box is generally used to distribute electrical energy from a power source to various electrical devices of a vehicle, and the distribution box of the vehicle has various switch devices, such as contactors and fuses, for controlling the flow of current and protecting the electrical devices.

[0048] In the distribution box of a vehicle, a switch device can be used to control the on-off of the positive and negative lines in the same circuit at the same time. Generally, two sets of contact assemblies are included in the switch device, one of which can be used to control the on-off of the positive line, and the other can be used to control the on-off of the negative line. The driving mechanism in the switch device can simultaneously drive the two sets of contact assemblies in the switch device to act, so that the positive and negative lines are turned on and off at the same time. However, when one of the positive and negative lines fails and causes one of the contact assemblies in the switch device to adhere and fail to break the line, the driving mechanism cannot work normally, and thus the other contact assembly in the switch device also cannot break the line normally, so that the circuit in which the switch device is located is always live, affecting the normal work of the distribution box, and also having a high risk of electric shock.

[0049] To at least partially solve the above problems, the first aspect of the present disclosure provides a switch device 70, as shown in FIGS. 1-11, comprising a first switch unit 10 and a second switch unit 20, wherein the first switch unit 10 and the second switch unit 20 can be used to control the on-off of the positive line and the negative line in the direct current circuit respectively, that is, the switch device 70 can be used to control the on-off of the positive line and the negative line at the same time, and the application of the switch device 70 to the distribution box can at least partially eliminate some contactors, simplify the structure of the distribution box, reduce the volume of the distribution box, and reduce the manufacturing cost of the distribution box.

[0050] In addition, the first switch unit 10 and the second switch unit 20 are respectively used for the positive electrode line and the negative electrode line, and are used for selectively disconnecting the positive electrode line and the negative electrode line, and are also used for selectively connecting the positive electrode line and the negative electrode line. The first switch unit 10 includes a first moving contact assembly 12, a first stationary contact assembly 11, and a first driving assembly 13. The first driving assembly 13 is drivingly connected with the first moving contact assembly 12, and is used for driving the first moving contact assembly 12 to move towards or away from the first stationary contact assembly 11, and is used for connecting or disconnecting the positive electrode line in the direct current circuit loop. The second switch unit 20 includes a second moving contact assembly 22, a second stationary contact assembly 21, and a second driving assembly 23. The second driving assembly 23 is drivingly connected with the second moving contact assembly 22, and is used for driving the second moving contact assembly 22 to move towards or away from the second stationary contact assembly 21, and is used for connecting or disconnecting the negative electrode line in the direct current circuit loop. The first switch unit 10 for controlling the connection or disconnection of the positive electrode line and the second switch unit 20 for controlling the connection or disconnection of the negative electrode line respectively have independent driving assemblies for driving the moving contact assemblies thereof, and can realize power-off through the other switch unit when the moving contact assembly of one switch unit and the stationary contact assembly thereof are stuck together and cause different realization of tripping, so that the power distribution box can be normally operated and has high safety. For example, when the first switch unit 10 fails, the circuit can be connected or disconnected through the second switch unit 20. It should be understood that when the second switch unit 20 fails, the circuit can also be connected or disconnected through the first switch unit 10, which is not limited here.

[0051] In some embodiments, the switch device 70 further includes a housing 40, and the first switch unit 10 and the second switch unit 20 are both arranged in the housing 40. The housing 40 is an insulating housing.

[0052] In the above-mentioned embodiments, as shown in FIG. 1, the housing 40 includes a base 41, a middle cover 43, and an upper cover 42. The base 41 and the middle cover 43 form a first containing space 80, and the first switch unit 10 is arranged in the first containing space 80. The middle cover 43 and the upper cover 42 form a second containing space, and the second switch unit 20 is arranged in the second containing space.

[0053] In some embodiments, the switch device 70 further includes an arc extinguishing assembly 14 arranged in the housing, and the first switch unit 10 and / or the second switch unit 20 are arc-extinguished through the arc extinguishing assembly 14.

[0054] In the above-mentioned embodiments, the switch device 70 includes three forms. In a first form, as shown in FIGS. 2, 3 and 11, the first switch unit 10 is arc-extinguished by the arc-extinguishing assembly 14, and the second switch unit 20 is not arc-extinguished by the arc-extinguishing assembly 14. When the switch device 70 is applied to a distribution box, the first switch unit 10 of the switch device 70 can be used to control the on-off of the main positive line in the distribution box which is connected to the positive pole of a power source (e.g. a battery), and the second switch unit 20 of the switch device 70 can be used to control the on-off of the main negative line in the distribution box which is connected to the negative pole of the power source (e.g. the battery). When the switch device 70 is operated, the first switch unit 10 including the arc-extinguishing assembly 14 can be controlled to turn on or turn off the main positive line in the distribution box, and then the second switch unit 20 can be controlled to turn on or turn off the main negative line in the distribution box. The first switch unit 10 including the arc-extinguishing assembly 14 and the second switch unit 20 not including the arc-extinguishing assembly 14 can reduce the volume of the switch device 70, and when the switch device 70 is applied to the distribution box, the switch device 70 can reduce the space occupied by the distribution box, and thus the volume of the distribution box can be reduced.

[0055] In a second form, the first switch unit 10 and the second switch unit 20 are both arc-extinguished by the arc-extinguishing assembly 14, and both of the switch units can be arc-extinguished. When the switch device 70 is applied to the circuit system of the distribution box, either of the first switch unit 10 and the second switch unit 20 can be connected to the main positive line in the distribution box which is connected to the power source (e.g. the battery).

[0056] In a third form, the first switch unit 10 is not arc-extinguished by the arc-extinguishing assembly 14, and the second switch unit 20 is arc-extinguished by the arc-extinguishing assembly 14. When the switch device 70 is applied to the distribution box, the second switch unit 20 of the switch device 70 can be connected to the main positive line in the distribution box which is connected to the power source (e.g. the battery), and the second switch unit 20 can be connected to the main negative line in the distribution box which is connected to the power source (e.g. the battery). When the switch device 70 is operated, the second switch unit 20 including the arc-extinguishing assembly 14 can be controlled to turn on or turn off the main positive line in the distribution box, and then the first switch unit 10 can be controlled to turn on or turn off the main negative line in the distribution box.

[0057] It should be noted that in the three forms of the switch device 70, when the moving contact of the moving contact assembly of one of the first switch unit 10 and the second switch unit 20 is stuck to the stationary contact of the stationary contact assembly, the moving contact of the moving contact assembly and the stationary contact of the stationary contact assembly of the other one can be controlled to be turned off, and thus the power supply is interrupted. Details are not described herein.

[0058] In some embodiments, as shown in FIG. 2, the housing 40 is provided with an opening 411 corresponding to the position of the arc extinguishing assembly 14, and a plurality of arc separation plates 30 with first through holes 31 are arranged between the opening 411 and the arc extinguishing assembly 14. Each of the arc separation plates 30 is provided with a plurality of first through holes 31. The opening 411 and the first through holes 31 can be used for the gas heated and expanded by the arc in the switch device 70 to be discharged from the housing 40 to the outside of the housing 40, and the plurality of arc separation plates 30 arranged between the opening 411 and the first switch unit 10 can prevent the arc in the housing 40 from being discharged to the outside of the housing 40. Specifically, the plurality of arc separation plates 30 can be arranged in the direction of the opening 411 towards the arc extinguishing assembly 14, and the arc separation plates 30 far from the arc extinguishing assembly 14 among the plurality of arc separation plates 30 can be clamped on the opening 411 of the wall of the housing 40 to cover the opening 411. In addition, the first through holes 31 on at least two adjacent arc separation plates 30 among the plurality of arc separation plates 30 can be staggered to prevent the arc from passing out of the housing 40 through the first through holes 31 on the arc separation plates 30.

[0059] In some embodiments, the housing 40 is provided with an opening 411, and a plurality of arc separation plates 30 with first through holes 31 are arranged between the opening 411 and the second switch unit 20. Each of the arc separation plates 30 is provided with a plurality of first through holes 31. The opening 411 and the first through holes 31 can be used for the gas heated and expanded by the arc in the switch device 70 to be discharged from the housing 40 to the outside of the housing 40, and the plurality of arc separation plates 30 arranged between the opening 411 and the second switch unit 20 can prevent the arc in the housing 40 from being discharged to the outside of the housing 40. Specifically, the plurality of arc separation plates can be arranged in the direction of the opening 411 towards the second switch unit 20, and the arc separation plates 30 far from the second switch unit 20 among the plurality of arc separation plates 30 can be clamped on the opening 411 of the wall of the housing 40 to cover the opening 411. In addition, the first through holes 31 on at least two adjacent arc separation plates 30 among the plurality of arc separation plates 30 can be staggered to prevent the arc from passing out of the housing 40 through the first through holes 31 on the arc separation plates 30.

[0060] In addition, it should be understood that the arc separation plates 30 are made of insulating materials.

[0061] In some embodiments, as shown in FIGS. 2 to 4, the arc extinguishing assembly 14 includes a grid holder 141, a grid group 143 and a gas generating member 142, the grid group 143 and the gas generating member 142 are arranged on the grid holder 141, and the grid group 143 includes a plurality of arc extinguishing grids 143a arranged in a first direction. The arc extinguishing grids 143a of the grid group 143 and the gas generating member 142 can be used to extinguish the arc.

[0062] In order to accelerate the extinction of the arc, an arc striking structure can be arranged in the switch device 70. In some embodiments, the first switch unit 10 and / or the second switch unit 20 further comprises a static arc striking structure 16 and a dynamic arc striking structure 17, the first static contact assembly 11 and / or the second static contact assembly 21 introduces the arc into the arc extinguishing assembly 14 through the static arc striking structure 16 to accelerate the transfer of the arc, so that the arc can be quickly introduced into the arc extinguishing assembly 14 for arc extinguishing. The first dynamic contact assembly 12 and / or the second dynamic contact assembly 22 introduces the arc into the arc extinguishing assembly 14 through the dynamic arc striking structure 17 to accelerate the transfer of the arc, so that the arc can be quickly introduced into the arc extinguishing assembly 14 for arc extinguishing. Among them, the grid group 143 and the gas generating element 142 in the arc extinguishing assembly 14 can be used to extinguish the arc, when the arc is introduced into the arc extinguishing assembly 14 by the static arc striking structure 16 and the dynamic arc striking structure 17, the arc will burn the gas generating element 142 to generate gas to consume the energy of the arc, and then introduce the arc into the grid group 143 for arc extinguishing. The arc extinguishing of the gas generating element 142 and the arc extinguishing of the grid group 143 are both existing arc extinguishing means, which will not be described here.

[0063] In the above embodiments, whether the static arc striking structure 16 and the dynamic arc striking structure 17 are arranged in the first switch unit 10 and the second switch unit 20 can be determined according to whether the arc extinguishing assembly 14 is included in the first switch unit 10 and the second switch unit 20. When the arc extinguishing assembly 14 is included in the first switch unit 10, the dynamic arc striking structure 17 and the static arc striking structure 16 can be included in the first switch unit 10; when the arc extinguishing assembly 14 is included in the second switch unit 20, the dynamic arc striking structure 17 and the static arc striking structure 16 can be included in the second switch unit 20.

[0064] In some embodiments, the first switch unit 10 in the switch device 70 includes the arc extinguishing assembly 14, the static arc striking structure 16 and the dynamic arc striking structure 17. As shown in FIGS. 2-4, the first static contact assembly 11 in the first switch unit 10 of the switch device 70 includes two first connecting terminal assemblies 111, each of which includes a first connecting terminal body 111a, and a first connecting terminal 111b and a first static contact 111c arranged at both ends of the first connecting terminal body 111a respectively, one end of the static arc striking structure 16 is connected to the first static contact 111c, and the other end of the static arc striking structure 16 is located on one side of the grid group 143 and is arranged in a spaced manner with the arc extinguishing grid 143a, which is used for arc striking of the first static contact 111c. Among them, the end of the static arc striking structure 16 away from the first static contact 111c is connected to the first static contact 111c at the same potential, which can facilitate the transfer of the arc root at the first static contact 111c to the end of the static arc striking structure 16 away from the first static contact 111c, and then facilitate the arc root at the first static contact 111c to be introduced into the arc extinguishing assembly 14 for arc extinguishing, so as to achieve the purpose of fast arc extinguishing.

[0065] In some embodiments, the static arc leading structure 16 is connected to the first connecting terminal body 111a at a position close to the first connecting terminal 111b, away from one end of the first static contact 111c, for shunting the current flowing through the first connecting terminal body 111a, and sharing part of the current flowing through the first connecting terminal body 111a. The static arc leading structure 16 can serve as a branch of the current when the current flows, and share part of the current flowing through the first connecting terminal body 111a. When arc is needed to be led, the arc root of the arc at the first static contact 111c can be quickly led to the arc extinguishing assembly 14 for arc extinguishing.

[0066] In some embodiments, as shown in FIGS. 2 and 3, the first connecting terminal body 111a can be configured as a U-shaped structure to form magnetic blowing force towards the arc extinguishing chamber, further accelerating the transfer of the arc root at the first static contact 111c.

[0067] As shown in FIGS. 2 and 3, the first static contact assembly 11 in the first switch unit 10 includes two first connecting terminal assemblies 111, and a static arc leading structure 16 is connected to each of the first static contacts 111c in the two first connecting terminal assemblies 111. In addition, the arc extinguishing assembly 14 in the first switch unit 10 is also two, and the two arc extinguishing assemblies 14 are respectively arranged corresponding to the two first connecting terminal assemblies 111, and can be used for arc extinguishing of the two first connecting terminal assemblies 111.

[0068] In some embodiments, as shown in FIGS. 2 to 4 and FIGS. 8 to 10, the first moving contact assembly 12 includes a first moving contact bridge 122 and two first moving contacts 121 arranged on the first moving contact bridge 122, the moving arc leading structure 17 includes a first arc leading part 171 and a second arc leading part 172, the first arc leading part 171 is connected to the first moving contact 121, the second arc leading part 172 includes a first end 172b and a second end 172a, the first end 172b corresponds to an end of the first arc leading part 171 away from the first moving contact 121 and has a gap 90 therebetween, the second end 172a is connected to the first moving contact 121 connected to the first arc leading part 171, for forming an equipotential connection between the second arc leading part 172 and the first moving contact 121, and the second end 172a is arranged on one side of the grid group 143 and is spaced apart from the arc extinguishing grid 143a, so as to facilitate the arc root at the first moving contact 121 to be introduced into the arc extinguishing assembly 14 for arc extinguishing through the first arc leading part 171 and the second arc leading part 172.

[0069] In the above embodiments, the specific path of the first moving contact 121 leading arc through the moving arc leading structure 17 can be: the arc root at the first moving contact 121 is transferred to the first arc leading part 171, the arc transferred to the first arc leading part 171 jumps to the first end 172b of the second arc leading part 172, and then is introduced into the arc extinguishing assembly 14 for arc extinguishing through the second arc leading part 172.

[0070] In some embodiments, the first end 172b of the second arc leading portion 172 of the arc leading portion structure 17 is formed with a bending portion 172c, which is arranged corresponding to the end of the first arc leading portion 171 away from the first moving contact 121. The arrangement of the bending portion 172c can facilitate the arc jumping of the end of the first arc leading portion 171 away from the first moving contact 121 to the second arc leading portion 172.

[0071] In some embodiments, as shown in FIG. 2, the two first moving contacts 121 in the first moving contact assembly 12 are each arranged with an arc leading structure 17 to lead the arc at the first moving contact 121 into the corresponding arc extinguishing assembly 14, so as to quickly transfer the arc at the first moving contact 121 to the arc extinguishing assembly 14 for extinguishing.

[0072] In addition, the first switch unit 10 further comprises an electrical connecting member 18. As described above, the two first moving contacts 121 in the first moving contact assembly 12 are each arranged with an arc leading structure 17 to lead the arc at the first moving contact 121 into the corresponding arc extinguishing assembly 14, i.e. each first moving contact 121 in the first moving contact assembly 12 is connected with a first arc leading portion 171, each first arc leading portion 171 has a corresponding second arc leading portion 172, and the electrical connecting member 18 is used to electrically connect each second arc leading portion 172, so as to make each first moving contact 121 and each second arc leading portion 172 in equal potential connection, thereby facilitating the arc root at the first moving contact 121 to transfer to the corresponding arc extinguishing assembly 14.

[0073] In some embodiments, the first moving contact 121 is electrically connected with the first driving assembly 13, and the electrical connecting member 18 is electrically connected with the first driving assembly 13, so as to electrically connect the first moving contact 121 with the second arc leading portion 172. The electrical connection between the first moving contact 121 and the first driving assembly 13 is realized through the first driving assembly 13 and the electrical connecting member 18, without the need to additionally add a structure for electrically connecting the first moving contact 121 and the second arc leading portion 172, thereby saving cost, simplifying the structure of the switch device 70, and saving space in the housing 40 of the switch device 70.

[0074] In some embodiments, as shown in FIGS. 2, 3 and 8, the first moving contact assembly 12 further comprises a first connecting member 123, a first support 124 and a first elastic member 125, the first support 124 is connected with the first moving contact bridge 122 through the first elastic member 125, the first connecting member 123 is sleeved on the first moving contact bridge 122 and the first support 124, and the first connecting member 123 is fixedly connected with the first support 124 or the first moving contact bridge 122.

[0075] In some embodiments, the first driving assembly 13 comprises a first push rod 131, the first support 124 is provided with a first clamping groove 124a, the first clamping groove 124a is clamped with the first push rod 131, and the first driving assembly 13 is used to drive the first moving contact assembly 12 to move. The first connecting piece 123 is provided with a first avoiding passage 123b corresponding to the first clamping groove 124a, the first avoiding passage 123b is used for the first push rod 131 to pass through, and the first push rod 131 is movably attached to the first avoiding passage 123b.

[0076] In some embodiments, the first connecting piece 123 is fixedly connected with the first moving contact bridge 122. As shown in FIGS. 8 to 10, a second through hole 123a can be formed on the first connecting piece 123, and the connecting piece can be fixed on the first moving contact bridge 122 by a screw passing through the second through hole 123a, so that the first connecting piece 123 can move relative to the first support 124. The first driving assembly 13 drives the first moving contact assembly 12 to move as a whole in the direction towards the first stationary contact assembly 11 by the first push rod 131, and when the first moving contact 121 of the first moving contact assembly 12 and the first stationary contact 111c of the first stationary contact assembly 11 abut, the first driving assembly 13 drives the first support 124 to continue to move by the first push rod 131. At this time, the first connecting piece 123 and the first moving contact bridge 122 stop moving, the first elastic piece 125 between the first support 124 and the first moving contact bridge 122 is compressed, the pressure between the first moving contact 121 and the first stationary contact 111c becomes larger, and the first driving assembly 13 is finally positioned, and the pressure generated at this time is the final pressure commonly used in the field. The moving contact assembly can make the connection between the first moving contact 121 and the first stationary contact 111c more reliable.

[0077] In other possible embodiments, when the first connecting piece 123 is fixedly connected with the first support 124, the first connecting piece 123 and the first moving contact bridge 122 are relatively movable, and the first driving assembly 13 drives the first moving contact assembly 12 to move in the direction towards the first stationary contact assembly 11 by the push rod of the first driving assembly 13. When the first moving contact 121 of the first moving contact assembly 12 abuts against the first stationary contact 111c of the first stationary contact assembly 11, the first driving assembly 13 drives the first support 124 and the first connecting piece 123 to continue to move, the first moving contact bridge 122 stops moving, the first elastic piece 125 between the first support 124 and the first moving contact bridge 122 is compressed, the pressure between the first moving contact 121 and the first stationary contact 111c becomes larger, and the first driving assembly 13 is finally positioned, and the pressure generated at this time is the final pressure commonly used in the field. The first moving contact assembly 12 can make the connection between the first moving contact 121 and the first stationary contact 111c more reliable.

[0078] In some embodiments, the first elastic member 125 can be configured as a spring, a protrusion can be arranged on the surface of the first movable contact bridge 122 opposite to the first support 124 and on the surface of the first support 124 opposite to the first movable contact bridge 122, and the two ends of the first elastic member 125 configured as a spring can be sleeved on the protrusions, facilitating the fixation of the first elastic member 125 configured as a spring.

[0079] In some embodiments, as shown in FIGS. 5-7, the first driving assembly 13 further comprises a first housing 132 and a first electromagnetic coil 133 for driving the first push rod 131, the first electromagnetic coil 133 is disposed in the first housing 132, one end of the first push rod 131 is disposed in a cavity formed by the first electromagnetic coil 133, and the other end of the first push rod 131 passes through the first housing 132 and is clamped with the first clamping groove 124a. Specifically, the first housing 132 comprises a first magnetic yoke 132a and a second magnetic yoke 132b. The coil former is disposed in the accommodating space formed by the first magnetic yoke 132a and the second magnetic yoke 132b for fixing the electromagnetic coil. The first driving assembly 13 further comprises a first static core 134, a second static core 135, a moving core 136 and a set of magnets 137. The electromagnetic coil is two, the two electromagnetic coils and the set of magnets 137 form an inner cavity, the first static core 134 is disposed at the bottom of the inner cavity, and the second static core 135 is disposed at the top of the inner cavity and connected with the first magnetic yoke 132a. One end of the first push rod 131 is located in the inner cavity and connected with the moving core 136, and the other end of the first push rod 131 extends out of the inner cavity through the second static core 135 and the first magnetic yoke 132a, and the first push rod 131 can move in the inner cavity with the moving core 136. The first push rod 131 is electrically connected with the second static core 135 and the first magnetic yoke 132a, and the first magnetic yoke 132a is electrically connected with the second magnetic yoke 132b. In addition, when the electromagnetic coil is not powered, the moving core 136 is in contact with the first static core 134, and the moving core 136 is kept stable by the magnetic force of the magnets 137. When the electromagnetic coil is momentarily powered, the moving core 136 starts to move under the push of the electromagnetic coil, the first push rod 131 extends out of the inner cavity, and drives the first movable contact assembly 12 through the first support 124, until the moving core 136 moves to the second static core 135 and abuts against the second static core 135, the moving core 136 stops moving. The first magnetic yoke 132a, the second magnetic yoke 132b, the first static core 134 and the second static core 135 are made of magnetic material and serve as a magnetic channel. When the electromagnetic coil is powered off, the magnetic force generated by the coil disappears, and the moving core 136 can be stably attached to the static core under the magnetic force of the magnets 137. When the electromagnetic coil is reversely powered, the state of the first driving assembly 13 changes, the moving core 136 moves towards the first static core 134, and the first push rod 131 retracts in the inner cavity. The first support 124 clamped with the first push rod 131 drives the first movable contact assembly 12 away from the first static contact assembly 11. After moving to the first static core 134, the moving core 136 stops moving.

[0080] In some embodiments, the electric connector 18 is electrically connected with the first housing 132, the first housing 132 is electrically connected with the first push rod 131, the first push rod 131 is movably attached to the inner wall of the first avoiding passage 123b and is electrically connected with the first connector 123, the first connector 123 is electrically connected with the first movable contact bridge 122, so that the first movable contact 121 is electrically connected through the first movable contact bridge 122, the first connector 123, the first push rod 131, the housing 132 and the electric connector 18. The housing 132 is a first magnetic yoke 132a and a second magnetic yoke 132b. The first movable contact assembly 12 and the first driving assembly 13 are used for the electrical connection of the first movable contact 121 and the second arc leading part 172, which can reduce the setting of redundant structures, save costs and reduce the space occupied in the housing 40 of the switch device 70.

[0081] As mentioned above, the second switch unit 20 of the switch device 70 includes the second stationary contact assembly 21, the second movable contact assembly 22 and the second driving assembly 23. The second switch unit 20 can include the movable arc leading structure 17, the stationary arc leading structure 16 and the arc extinguishing assembly 14, or the second switch unit 20 can not include the movable arc leading structure 17, the stationary arc leading structure 16 and the arc extinguishing assembly 14.

[0082] As shown in FIG. 11, the second switch unit 20 does not include the movable arc leading structure 17, the stationary arc leading structure 16 and the arc extinguishing assembly 14. The structure of the second driving assembly 23 in the second switch unit 20 is the same as that of the first driving assembly 13 in the first switch unit 10, the structure of the second movable contact assembly 22 in the second switch unit 20 is also the same as that of the first movable contact assembly 12 in the first switch unit 10, the connection relationship between the second driving assembly 23 and the second movable contact assembly 22 is also the same as that between the first driving assembly 13 and the second movable contact assembly 22 in the first switch unit 10, and the driving process between the second driving assembly 23 and the second movable contact assembly 22 is also the same as that between the first driving assembly 13 and the second movable contact assembly 22 in the first switch unit 10, which will not be described here.

[0083] In addition, as shown in FIG. 11, the second static contact assembly 21 in the second switch unit 20 includes two second connection terminal assemblies 211, each of which includes a second connection terminal body 211c and a second connection terminal 211b and a second static contact 211a arranged at the two ends of the second connection terminal body 211c respectively, the second movable contact assembly 22 includes two second movable contacts 221 arranged corresponding to the two second static contacts 211a, and the second driving assembly 23 drives the second movable contact assembly 22 to move in the direction towards or away from the second static contact assembly 21, so that the second movable contact 221 moves in the direction close to or away from the second static contact 211a, and then the second movable contact 221 and the corresponding second static contact 211a can be in abutment or disconnected.

[0084] In some embodiments, as shown in FIG. 11, the switch device 70 further includes a control unit 50, and as shown in FIG. 2, the first switch unit 10 further includes a shunt 15 arranged on the first connection terminal body 111a, and the shunt 15, the first driving assembly 13 and the second driving assembly 23 are all in communication connection with the control unit 50. The control unit 50 can collect the current signal flowing through the first connection terminal body 111a through the shunt 15, control the first driving assembly 13 and the second driving assembly 23 to work according to the collected current signal, so as to control the first movable contact 121 of the first movable contact assembly 12 and the first static contact 111c of the first static contact assembly 11 to be in abutment or disconnected, and also control the second movable contact of the second movable contact assembly 22 and the second static contact 211a of the second static contact assembly 21 to be in abutment or disconnected.

[0085] In some embodiments, as shown in FIG. 2, an insulating piece 19 is arranged between the first connection terminal body 111a and the grid group 143, which can separate the shunt 15 from the arc extinguishing assembly 14 to prevent the arc extinguishing assembly 14 from generating electromagnetic interference to the shunt 15.

[0086] In some embodiments, the current signal of the first connection terminal body 111a is collected through the shunt 15, and the disconnection between the first movable contact 121 and the first static contact 111c in the first switch unit 10 is controlled according to the current signal of the first connection terminal body 111a, and arc extinguishing is performed through the arc extinguishing assembly 14, so as to realize the function of overcurrent protection of the circuit in which the switch device 70 is connected. After the switch device 70 collects the current signal through the shunt 15, the disconnection of the first movable contact 121 and the first static contact 111c in the first switch unit 10 is controlled according to the value of the current signal, which can overcome the situation that the fuse cannot be normally fused under small overload current conditions, so as to make the safety of the switch device 70 higher.

[0087] In some embodiments, referring to FIG. 11, the control unit 50 can be configured as a circuit board 500, the circuit board 500 is signal connected with the shunt 15, the circuit board 500 is also signal connected with the electromagnetic coils of the first drive assembly 13 and the second drive assembly 23 respectively, in addition, referring to FIG. 1, the shell 40 is also provided with a communication interface 60, the circuit board 500 is also signal connected with the communication interface 60, the circuit board 500 is arranged in the second containing space enclosed by the middle cover 43 and the upper cover 42, and the circuit board 500 at least includes a signal conditioning module, a processor control module, a drive module and a communication module. When the switch device 70 realizes the function of overcurrent protection, the current signal collected by the shunt 15 is transmitted to the signal conditioning module, the current signal is further transmitted to the processor control module after being processed by the signal conditioning module, the processor control module compares the current signal with the threshold of the preset overcurrent protection signal, when the value of the collected current signal is greater than the threshold of the overcurrent protection signal, the drive module drives the first drive assembly 13 to work, so that the first moving contact 121 is disconnected with the corresponding first stationary contact 111c, wherein the moving arc structure 17 and the stationary arc structure 16 in the first switch unit 10 can introduce the arc generated between the first moving contact 121 and the first stationary contact 111c into the arc extinguishing assembly 14 for arc extinguishing, so as to complete the overcurrent protection; then the drive module drives the second drive assembly 23 to work, so that the second moving contact 221 is disconnected with the second stationary contact 211a.

[0088] In some embodiments, the external control device can transmit a control signal to the circuit board 500 through the communication interface 60, the control signal is transmitted to the processor module, the processor module drives the first drive assembly 13 and the second drive assembly 23 to work through the drive module according to the control signal, so as to drive the connection and disconnection between the first moving contact 121 and the first stationary contact 111c and the connection and disconnection between the second moving contact 221 and the second stationary contact 211a, so as to control the connection and disconnection of the line connected with each switch unit respectively.

[0089] The second aspect of the present disclosure provides a distribution box, which comprises the switch device 70 provided in the first aspect of the present disclosure, and all the beneficial effects of the switch device 70 are included in the distribution box.

[0090] The third aspect of the present disclosure provides a vehicle, which comprises the switch device 70 provided in the first aspect of the present disclosure and the distribution box provided in the second aspect of the present disclosure. The vehicle can be a pure electric vehicle or a hybrid electric vehicle, which is not limited here.

[0091] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, which all belong to the protection scope of the present disclosure.

[0092] It should also be noted that various technical features described in the above detailed description are capable of being combined in any suitable manner, and that the disclosure is not limited to the specific combinations set out in the above detailed description.

[0093] Furthermore, various embodiments of the disclosure can be combined in any suitable manner, as long as they do not contradict the idea of the disclosure, and they should also be considered as disclosed by the disclosure.

Claims

1. A switching device (70) characterized by, The switch device (70) comprises: a first switch unit (10) comprising a first movable contact assembly (12), a first static contact assembly (11) and a first driving assembly (13), the first driving assembly (13) being connected with the first movable contact assembly (12) and used for driving the first movable contact assembly (12) to move in a direction towards or away from the first static contact assembly (11); and a second switch unit (20) comprising a second movable contact assembly (22), a second static contact assembly (21) and a second driving assembly (23), the second driving assembly (23) being connected with the second movable contact assembly (22) and used for driving the second movable contact assembly (22) to move in a direction towards or away from the second static contact assembly (21); the first switch unit (10) and the second switch unit (20) are respectively used for a positive line and a negative line, and are used for selectively disconnecting the positive line and the negative line; when the first switch unit (10) fails, the circuit is turned on or off by the second switch unit (20).

2. The switching device (70) according to claim 1, characterized in that The switch device (70) further comprises a housing (40), and the first switch unit (10) and the second switch unit (20) are both arranged in the housing (40).

3. The switching device (70) according to claim 2, characterized in that The housing (40) comprises a base (41), a middle cover (43) and an upper cover (42), the base (41) and the middle cover (43) form a first containing space (80), the first switch unit (10) is arranged in the first containing space (80), and the middle cover (43) and the upper cover (42) form a second containing space, and the second switch unit (20) is arranged in the second containing space.

4. The switching device (70) according to claim 2 or 3, characterized in that The switch device (70) further comprises an arc extinguishing assembly (14) arranged in the housing (40), and the first switch unit (10) and / or the second switch unit (20) are arc-extinguished by the arc extinguishing assembly (14).

5. The switching device (70) according to claim 4, characterized in that The housing (40) is provided with an opening (411) corresponding to the position of the arc extinguishing assembly (14), and a plurality of arc separation plates (30) with first through holes (31) are arranged between the opening (411) and the arc extinguishing assembly (14).

6. The switching device (70) according to claim 5, characterized in that The first through holes (31) on at least two adjacent arc separation plates (30) in the plurality of arc separation plates (30) are staggered.

7. The switching device (70) according to any one of claims 4-6, characterized in that The arc extinguishing assembly (14) comprises a grid support (141), a grid group (143) and a gas generating element (142), the grid group (143) and the gas generating element (142) are both arranged in the grid support (141), and the grid group (143) comprises a plurality of arc-extinguishing grids (143a) arranged at intervals in a first direction.

8. The switching device (70) according to claim 7, characterized in that The first switch unit (10) and / or the second switch unit (20) further comprises a static arc leading structure (16) and a dynamic arc leading structure (17); the first static contact assembly (11) and / or the second static contact assembly (21) leads the electric arc into the arc extinguishing assembly (14) through the static arc leading structure (16), and the first dynamic contact assembly (12) and / or the second dynamic contact assembly (22) leads the electric arc into the arc extinguishing assembly (14) through the dynamic arc leading structure (17).

9. The switching device (70) according to claim 8, characterized in that, The first static contact assembly (11) comprises two first connecting terminal assemblies (111), each of which comprises a first connecting terminal body (111a) and a first connecting terminal (111b) and a first static contact point (111c) arranged at two ends of the first connecting terminal body (111a) respectively, one end of the static arc leading structure (16) is connected to the first static contact point (111c), and the other end of the static arc leading structure (16) is arranged on one side of the grid group (143) and is spaced apart from the arc extinguishing grid (143a) for leading the arc for the first static contact point (111c).

10. The switching device (70) according to claim 9, characterized in that One end of the static arc leading structure (16) away from the first static contact point (111c) is connected to the first connecting terminal body (111a) near the first connecting terminal (111b) for shunting the current flowing through the first connecting terminal body (111a).

11. The switching device (70) according to claim 9 or 10, characterized in that The switch device (70) further comprises a control unit (50), the first switch unit (10) further comprises a shunt (15) arranged on the first connecting terminal body (111a), and the shunt (15), the first driving assembly (13) and the second driving assembly (23) are connected with the control unit (50).

12. The switching device (70) according to any one of claims 8-11, characterized in that The first dynamic contact assembly (12) comprises a first dynamic contact bridge (122) and two first dynamic contact points (121) arranged on the first dynamic contact bridge (122), the dynamic arc leading structure (17) comprises a first arc leading part (171) and a second arc leading part (172), the first arc leading part (171) is connected to the first dynamic contact point (121), the second arc leading part (172) comprises a first end (172b) and a second end (172a), the first end (172b) corresponds to one end of the first arc leading part (171) away from the first dynamic contact point (121) and has a gap (90) therebetween, the second end (172a) is connected with the first dynamic contact point (121) connected with the first arc leading part (171), and the second end (172a) is arranged on one side of the grid group (143) and is spaced apart from the arc extinguishing grid (143a).

13. The switching device (70) according to claim 12, characterized in that The first end (172b) is formed with a bending part (172c) arranged correspondingly to one end of the first arc leading part (171) away from the first dynamic contact point (121).

14. The switching device (70) according to claim 12 or 13, characterized in that The first switch unit (10) further comprises an electrical connector (18), each of the first movable contacts (121) is connected with the first arc striking part (171), each of the first arc striking parts (171) has a corresponding second arc striking part (172), and the electrical connector (18) is used for connecting each of the second arc striking parts (172).

15. The switching device (70) according to claim 14, characterized in that The first movable contact (121) is connected with the first driving assembly (13), and the electrical connector (18) is connected with the first driving assembly (13), so that the first movable contact (121) is connected with the second arc striking part (172).

16. The switching device (70) according to claim 14 or 15, characterized in that The first movable contact assembly (12) further comprises a first connector (123), a first support (124) and a first elastic member (125), the first support (124) and the first movable contact bridge (122) are connected through the first elastic member (125), the first connector (123) is sleeved on the first movable contact bridge (122) and the first support (124), and the first connector (123) is fixedly connected with the first support (124) or the first movable contact bridge (122).

17. The switching device (70) according to claim 16, characterized in that The first driving assembly (13) comprises a first push rod (131), the first support (124) is provided with a first clamping groove (124a), the first clamping groove (124a) is matched with the first push rod (131), and the first driving assembly (13) is used for driving the first movable contact assembly (12) to move, the first connector (123) is provided with a first avoiding channel (123b) corresponding to the first clamping groove (124a), and the first avoiding channel (123b) is used for allowing the first push rod (131) to pass through.

18. The switching device (70) according to claim 17, characterized in that The first driving assembly (13) further comprises a first housing (132) and a first electromagnetic coil (133) used for driving the first push rod (131), the first electromagnetic coil (133) is arranged in the first housing (132), one end of the first push rod (131) is arranged in an inner cavity surrounded by the first electromagnetic coil (133), and the other end of the first push rod (131) passes through the first housing (132) and is clamped with the first clamping groove (124a).

19. The switching device (70) according to claim 18, characterized in that The electrical connector (18) is connected with the first housing (132), the first housing (132) is connected with the first push rod (131), the first push rod (131) is movably attached to an inner wall of the first avoiding channel (123b) and connected with the first connector (123), the first connector (123) is connected with the first movable contact bridge (122), so that the first movable contact (121) is connected through the first movable contact bridge (122), the first connector (123), the first push rod (131), the first housing (132) and the electrical connector (18).

20. A distribution box, characterized by The switch device (70) comprises the switch device (70) according to any one of claims 1-19.

21. A vehicle characterized by A switch device (70) as claimed in any one of claims 1-19 or a distribution box as claimed in claim 20.

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