High-voltage contactor applicable to strong magnetic environment

Abstract

The invention discloses a high-voltage contactor applicable to a strong magnetic environment, and belongs to the technical field of high-voltage contactors. Two high-voltage contact heads are mounted at the top end of the shell, and a contact bridge is movably mounted in the shell; a piston located in the piston cavity is installed below the contact bridge. A pneumatic part or a hydraulic transmission part or a mechanical transmission part is installed at the bottom of the piston cavity in a sealed mode through a butt joint opening, the piston is indirectly controlled through the pneumatic part or the hydraulic transmission part, and the piston is directly controlled through the mechanical transmission part, so that the piston moves back and forth towards the position where the high-pressure contact head is located in the piston cavity. And finally, the contact bridge and the two high-voltage contact heads are controlled to be simultaneously closed or opened. The high-voltage contactor is controlled to be closed and opened in a pneumatic, hydraulic or mechanical transmission mode, the whole control process is not influenced by a strong magnetic environment, potential safety hazards such as control failure caused by strong magnetism do not exist, and the high-voltage contactor has better stability and reliability when being applied.

Description

Technical Field

[0001] The present invention relates to the technical field of high - voltage contactors, and particularly to a high - voltage contactor applicable to a strong magnetic environment. Background Art

[0002] With the development of technology and the promotion of the national new energy vehicle industry development plan, the popularity rate of new energy vehicles is getting higher and higher. The high - voltage contactor in the high - voltage main circuit of new energy vehicles is the most core component related to the connection of high - voltage power.

[0003] Currently, the high - voltage contactors used in new energy vehicles at home and abroad are electromagnetic - drive high - voltage contactors. As Figures 1 to 2 shown, this electromagnetic - drive high - voltage contactor includes a housing 1. Two high - voltage contact heads 2 are fixed at the top of the housing 1. A contact bridge 3 linked with a piston 4 is installed inside the housing 1. The piston 4 is a moving magnetic core made of magnetic material. The piston 4 can move in a piston chamber 5 inside the housing 1, and a low - voltage coil 6 is arranged around the piston 4. When the low - voltage coil 6 is energized, the piston 4 is magnetized to generate suction force, and the piston 4 attracts an iron block above it to achieve the closing of the high - voltage contactor.

[0004] However, when this electromagnetic high - voltage contactor is in a strong magnetic environment, the piston 4 and the iron block above it will be magnetized simultaneously, making them two magnets with opposite polarities at the approaching ends, resulting in the out - of - control closing of the high - voltage contactor and posing a great potential safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high - voltage contactor applicable to a strong magnetic environment. This high - voltage contactor controls its closing and opening in a pneumatic, hydraulic or mechanical transmission manner. The entire control process is not affected by the strong magnetic environment and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0006] The technical solution of the present invention is realized as follows:

[0007] A high - voltage contactor applicable to a strong magnetic environment includes a housing;

[0008] Two high - voltage contact heads are fixedly installed at the top end of the housing, and a contact bridge capable of closing or opening the two high - voltage contact heads simultaneously is movably installed inside the housing;

[0009] A piston made of non - magnetic material is concentrically installed below the contact bridge. The piston is located in a piston chamber inside the housing. An interface is opened at the bottom of the piston chamber, and a driving component is installed in the interface. The driving component is a pneumatic component, a hydraulic transmission component or a mechanical transmission component;

[0010] When the driving component is a pneumatic component, a sealed area is constructed in the piston chamber between the piston and the docking port. Injecting or pumping gas into this sealed area through the pneumatic component can indirectly control the piston to move back and forth in the piston chamber towards the location of the high-voltage contact head, and finally control the contact bridge to simultaneously close or disconnect from the two high-voltage contact heads;

[0011] When the driving component is a hydraulic transmission component, a sealed area is constructed in the piston chamber between the piston and the docking port. Injecting or pumping liquid into this sealed area through the hydraulic transmission component can indirectly control the piston to move back and forth in the piston chamber towards the location of the high-voltage contact head, and finally control the contact bridge to simultaneously close or disconnect from the two high-voltage contact heads;

[0012] When the driving component is a mechanical transmission component, the mechanical transmission component can directly control the piston to move back and forth in the piston chamber towards the location of the high-voltage contact head, and finally control the contact bridge to simultaneously close or disconnect from the two high-voltage contact heads.

[0013] Adopting the above scheme, the high-voltage contactor controls its closing and opening in a pneumatic, hydraulic or mechanical transmission manner. The entire control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0014] As a preferred implementation of the high-voltage contactor applicable to a strong magnetic environment, when the driving component is a pneumatic component, the construction conditions of the sealed area in the piston chamber are as follows:

[0015] Condition 1: A first sealing ring that is sealingly attached to the side wall of the piston chamber is installed on the upper limit of the piston body of the piston, and the pneumatic component is sealingly installed on the docking port;

[0016] Or Condition 2: A corrugated airbag is placed in the piston chamber between the piston and the docking port, and the lower part of the corrugated airbag is sealingly docked with the pneumatic component.

[0017] Adopting the above scheme, when the driving component is a pneumatic component, the high-voltage contactor is a pneumatic high-voltage contactor. It indirectly controls its closing and opening in a pneumatic manner. The entire control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0018] As a preferred implementation of the high-voltage contactor applicable to a strong magnetic environment, the pneumatic component is an air pump, and the air pump fills the sealed area with gas, and the gas is an inert gas.

[0019] Adopting the above scheme, in order to achieve pneumatic operation, an air pump is specifically used for driving; in order to further improve the stability of the gas in the above-mentioned sealed area, an inert gas such as nitrogen is used, and this type of gas is less affected by conditions such as temperature.

[0020] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, a cooling pot is further installed inside the housing and is arranged circumferentially around the piston chamber, and the cooling pot is filled with a coolant.

[0021] With the above solution, since the piston chamber is frequently inflated and deflated, the temperature inside the piston chamber will gradually increase. In order to further reduce the temperature around the piston chamber, a cooling pot is added to cool the periphery of the piston chamber.

[0022] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, when the driving component is a hydraulic transmission component, the structural conditions of the sealed area inside the piston chamber are as follows:

[0023] Condition 1: A second sealing ring that is installed on the piston body in a limited position and is in sealing fit with the side wall of the piston chamber, and the hydraulic transmission component is sealed and installed on the docking port;

[0024] Or Condition 2: A corrugated liquid bag is placed inside the piston chamber between the piston and the docking port, and the lower part of the corrugated liquid bag is in sealed butt joint with the hydraulic transmission component.

[0025] With the above solution, when the driving component is a hydraulic transmission component, the high-voltage contactor is a hydraulic high-voltage contactor, which indirectly controls its closing and opening in a hydraulic manner. The entire control process is not affected by the strong magnetic environment, and there will be no potential safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0026] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, the hydraulic transmission component is a water pump; in Condition 1 of the structural conditions of the sealed area inside the piston chamber, the liquid injected by the water pump into the sealed area is a coolant or a lubricating liquid; in Condition 2 of the structural conditions of the sealed area inside the piston chamber, the liquid injected by the water pump into the sealed area is a coolant.

[0027] With the above solution, in order to achieve hydraulic movement, a water pump is specifically used for driving; in order to further reduce the temperature inside and around the piston chamber, a coolant such as ethylene glycol is used as a booster to drive the piston, which can reduce the temperature inside and around the piston chamber; in order to further lubricate the piston and reduce the wear and corrosion of the piston, a lubricating oil or the like is used as a booster to drive the piston, which can not only lubricate the inner wall of the piston chamber, but also reduce the wear and corrosion of the piston.

[0028] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, when the driving component is a mechanical transmission component, a push rod that penetrates from the docking port into the piston chamber is detachably fixed on the mechanical transmission component; the push rod is made of non-magnetic material, and a buffer block is also installed in a limited position on the lower surface of the piston that is abutted by the push rod, and the push rod abuts on the buffer block.

[0029] With the above solution, when the driving component is a mechanical transmission component, the high-voltage contactor is a mechanical high-voltage contactor, which directly controls its closing and opening in a mechanical transmission manner. The entire control process is not affected by the strong magnetic environment, and there will be no potential safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0030] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, the mechanical transmission component is a single-axis lead screw slide; the single-axis lead screw slide includes a base, a lead screw, a guide rod, a slide seat and a motor, and the slide seat is driven by the motor to slide along the lead screw and the guide rod; the push rod is fixed on the slide seat.

[0031] With the above solution, in order to achieve mechanical transmission, a single-axis lead screw slide is specifically used for driving, and the slide seat is driven by the motor to slide along the lead screw and the guide rod, thereby driving the push rod to reciprocate.

[0032] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, the contact bridge and the piston are concentrically docked through a connecting rod, and a return spring that pushes the piston to move towards the docking head is sleeved on the lower half of the connecting rod.

[0033] With the above solution, in order to achieve the automatic reset of the piston, after the liquid movement component pumps out the liquid, the piston is pushed by the elastic force of the return spring to move towards the docking head. At this time, the contact bridge and the two high-voltage contact heads are disconnected at the same time, that is, the high-voltage contactor is automatically disconnected.

[0034] As a preferred embodiment of a high-voltage contactor applicable to a strong magnetic environment, a buckle one and a buckle two are concentrically docked on the upper half of the connecting rod, and a buffer spring is sleeved on the connecting rod between the buckle one and the buckle two;

[0035] The buckle one is located above the buckle two, and the contact bridge is fixed on the buckle one, and the buffer spring pushes the buckle one to move towards the high-voltage contact head.

[0036] With the above solution, in order to reduce the impact force when the contact bridge contacts the two high-voltage contact heads, a buffer spring is installed between the buckle one and the buckle two. When the contact bridge contacts the two high-voltage contact heads, the buffer spring will be compressed instantly, that is, the impact force generated when the contact bridge contacts the two high-voltage contact heads is converted into the elastic potential energy of the buffer spring, thereby extending the service life of the contact bridge.

[0037] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0038] 1. The high-voltage contactor controls its closing and opening by means of pneumatic, hydraulic or mechanical transmission; when the driving component is a pneumatic component, the high-voltage contactor is a pneumatic high-voltage contactor; when the driving component is a hydraulic transmission component, the high-voltage contactor is a hydraulic high-voltage contactor; when the driving component is a mechanical transmission component, the high-voltage contactor is a mechanical high-voltage contactor; the entire control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism, and it has better stability and reliability during application;

[0039] 2. To achieve pneumatic operation, an air pump is specifically used for driving; in order to further improve the stability of the gas in the above-mentioned sealed area, inert gases such as nitrogen are used, and such gases are less affected by conditions such as temperature.

[0040] 3. Since the piston chamber is frequently inflated and deflated, the temperature in the piston chamber will gradually increase. In order to further reduce the temperature around the piston chamber, a cooling kettle is added to cool the periphery of the piston chamber;

[0041] 4. To achieve hydraulic operation, a water pump is specifically used for driving; in order to further reduce the temperature inside and around the piston chamber, a coolant such as ethylene glycol is used as a booster to drive the piston, which can reduce the temperature inside and around the piston chamber; in order to further lubricate the piston and reduce the wear and corrosion of the piston, a lubricating oil or the like is used as a booster to drive the piston, which can not only lubricate the inner wall of the piston chamber, but also reduce the wear and corrosion of the piston;

[0042] 5. To achieve mechanical transmission, a single-axis lead screw slide is specifically used for driving, and the motor drives the slide to slide along the lead screw and guide rod, thereby driving the ejector rod to reciprocate;

[0043] 6. To achieve automatic reset of the piston, after the hydraulic component pumps out the liquid, the piston moves towards the docking head under the elastic action of the return spring. At this time, the contact bridge and the two high-voltage contact heads are simultaneously disconnected, that is, the high-voltage contactor automatically disconnects;

[0044] 7. In order to reduce the impact force when the contact bridge contacts the two high-voltage contact heads, a buffer spring is installed between the first buckle and the second buckle. When the contact bridge contacts the two high-voltage contact heads, the buffer spring will be compressed instantly, that is, the impact force generated when the contact bridge contacts the two high-voltage contact heads is converted into the elastic potential energy of the buffer spring, thereby extending the service life of the contact bridge. Description of the Drawings

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0046] Figure 1 It is a three-dimensional structure diagram of an electromagnetic drive type high-voltage contactor in the background technology;

[0047] Figure 2 For showing Figure 1 A three-dimensional structure diagram of the internal structure;

[0048] Figure 3 It is a three-dimensional structure diagram of a pneumatic type high-voltage contactor in Embodiment 1;

[0049] Figure 4 For showing Figure 3 A three-dimensional structure diagram of the internal structure;

[0050] Figure 5 It is a three-dimensional structure diagram of the internal structure of a pneumatic type high-voltage contactor in Embodiment 2;

[0051] Figure 6 It is a three-dimensional structure diagram of the internal structure of a pneumatic type high-voltage contactor in Embodiment 3;

[0052] Figure 7 It is a three-dimensional structure diagram of the internal structure of a pneumatic type high-voltage contactor in Embodiment 4;

[0053] Figure 8 It is a three-dimensional structure diagram of a hydraulic type high-voltage contactor in Embodiments 5 and 6;

[0054] Figure 9 For showing Figure 8 A three-dimensional structure diagram of the internal structure;

[0055] Figure 10 It is a three-dimensional structure diagram of the internal structure of a hydraulic type high-voltage contactor in Embodiment 7;

[0056] Figure 11 It is a three-dimensional structure diagram of a mechanical type high-voltage contactor in Embodiment 8;

[0057] Figure 12 For showing Figure 11 A three-dimensional structure diagram of the internal structure.

[0058] Markings in the figure: 1 - housing; 2 - high - voltage contact; 3 - contact bridge; 4 - piston; 5 - piston chamber; 6 - low - voltage coil; 7 - docking port; 8 - pneumatic component; 9 - seal ring one; 10 - corrugated airbag; 11 - cooling kettle; 12 - hydraulic transmission component; 13 - seal ring two; 14 - corrugated liquid bag; 15 - mechanical transmission component; 16 - ejector rod; 17 - buffer block; 18 - connecting rod; 19 - return spring; 20 - buckle one; 21 - buckle two; 22 - buffer spring. Detailed implementation

[0059] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0060] Embodiment 1, as Figures 3 to 4 shown, a high - voltage contactor applicable to a strong magnetic environment includes a housing 1; two high - voltage contacts 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 capable of closing or disconnecting the two high - voltage contacts 2 simultaneously is movably installed inside the housing 1, where both the high - voltage contact 2 and the contact bridge 3 are conductors; a piston 4 made of non - magnetic material (such as copper, etc.) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a docking port 7 is opened at the bottom of the piston chamber 5, and a pneumatic component 8, such as an integrated air - charging and air - pumping air pump, etc., is hermetically installed in the docking port 7 through threads; a seal ring one 9 that is in sealing contact with the side wall of the piston chamber 5 is installed at the upper limit of the piston body of the piston 4; a sealed area is formed in the piston chamber 5 between the piston 4 and the docking port 7, and by inflating or pumping air into this sealed area through the pneumatic component 8, the piston 4 can be controlled to move back and forth in the piston chamber 5 towards the location where the high - voltage contact 2 is located, and finally control the contact bridge 3 to close or disconnect from the two high - voltage contacts 2 simultaneously. This high - voltage contactor controls its closing and disconnecting in a pneumatic manner, and the entire control process is not affected by the strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0061] The pneumatic component 8 fills the sealed area formed in the piston chamber 5 with gas, and this gas is an inert gas, such as nitrogen, etc. In order to further improve the stability of the gas in the above - mentioned sealed area, an inert gas such as nitrogen is used, and such gases are less affected by conditions such as temperature.

[0062] As Figure 4As shown in the figure, the contact bridge 3 and the piston 4 are concentrically butted through the thread of the connecting rod 18. A return spring 19 that pushes the piston 4 to move towards the docking head is sleeved on the lower half of the connecting rod 18. In order to realize the automatic reset of the piston 4, after the pneumatic component extracts air, the piston 4 is pushed by the elastic force of the return spring 19 to move towards the docking head. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are disconnected simultaneously, that is, the high-voltage contactor is automatically disconnected.

[0063] As Figure 4 shown in the figure, the upper half of the connecting rod 18 is concentrically clamped with a first buckle 20 and a second buckle 21. A buffer spring 22 is sleeved on the connecting rod 18 between the first buckle 20 and the second buckle 21. Both the first buckle 20 and the second buckle 21 are insulators; the first buckle 20 is located above the second buckle 21, and the contact bridge 3 is fixed on the first buckle 20. The buffer spring 22 pushes the first buckle 20 to move towards the high-voltage contact head 2. In order to reduce the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, a buffer spring 22 is installed between the first buckle 20 and the second buckle 21. When the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously, the buffer spring 22 will be compressed, that is, the impact force generated when the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously is converted into the elastic potential energy of the buffer spring 22, thereby prolonging the service life of the contact bridge 3.

[0064] The working principle of this embodiment:

[0065] This high-voltage contactor is a pneumatic high-voltage contactor, which is applied to new energy vehicles. It is connected and controlled by the vehicle computer, and the pneumatic component 8 is used to control its closing and opening pneumatically. The whole control process is not affected by the strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application. When applied, the pneumatic component 8 is connected to the gas storage tank beside it. When the pneumatic component 8 inflates or extracts air into this sealed area, it can control the piston 4 to move back and forth in the piston chamber 5 towards the high-voltage contact head 2, and finally control the contact bridge 3 and the two high-voltage contact heads 2 to close or disconnect simultaneously.

[0066] Embodiment 2, as Figure 5 shown in the figure, the difference between this embodiment and Embodiment 1 is only that, based on Embodiment 1, a cooling kettle 11 is also installed inside the housing 1 and is arranged circumferentially around the piston chamber 5. The cooling kettle 11 is filled with a coolant, such as ethylene glycol, etc. Since the piston chamber 5 is frequently inflated and extracted, the temperature inside the piston chamber 5 will gradually increase. In order to further reduce the temperature around the piston chamber 5, a cooling kettle 11 is added to cool the periphery of the piston chamber 5.

[0067] Embodiment 3, as Figure 6As shown in the figure, a high-voltage contactor applicable to a strong magnetic environment includes a housing 1; two high-voltage contact heads 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 that can simultaneously close or disconnect the two high-voltage contact heads 2 is movably installed inside the housing 1. Both the high-voltage contact head 2 and the contact bridge 3 are conductors; a piston 4 made of non-magnetic material (such as copper, etc.) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; an interface 7 is opened at the bottom of the piston chamber 5, and a pneumatic component 8, such as an integrated air pump for inflation and air extraction, etc., is hermetically installed in the interface 7 through threads; a corrugated airbag 10 is placed in the piston chamber 5 between the piston 4 and the interface 7, and the lower part of the corrugated airbag 10 is hermetically docked with the docking head; a sealed area is formed inside the corrugated airbag 10, and by inflating or extracting air into this sealed area through the pneumatic component 8, the piston 4 can be controlled to move back and forth in the piston chamber 5 towards the position where the high-voltage contact head 2 is located, and finally control the contact bridge 3 to simultaneously close or disconnect with the two high-voltage contact heads 2. This high-voltage contactor controls its closing and disconnecting in a pneumatic manner, and the entire control process is not affected by the strong magnetic environment, and there will be no potential safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0068] The pneumatic component 8 fills the sealed area formed inside the corrugated airbag 10 with gas, and this gas is an inert gas. In order to further improve the stability of the gas in the above-mentioned sealed area, an inert gas such as nitrogen is used, and this type of gas is less affected by conditions such as temperature.

[0069] such as Figure 6 As shown in the figure, the contact bridge 3 and the piston 4 are concentrically docked through the threads of a connecting rod 18, and a return spring 19 that pushes the piston 4 towards the position where the docking head is located is sleeved on the lower half of the connecting rod 18. In order to achieve the automatic reset of the piston 4, when the pneumatic component extracts air, the piston 4 moves towards the position where the docking head is located under the elastic action of the return spring 19. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are simultaneously disconnected, that is, the high-voltage contactor automatically disconnects.

[0070] such as Figure 6As shown in the figure, the upper half of the connecting rod 18 is concentrically clamped with a first buckle 20 and a second buckle 21. A buffer spring 22 is sleeved on the connecting rod 18 between the first buckle 20 and the second buckle 21. Both the first buckle 20 and the second buckle 21 are insulators. The first buckle 20 is located above the second buckle 21. The contact bridge 3 is fixed on the first buckle 20. The buffer spring 22 pushes the first buckle 20 to move towards the high-voltage contact head 2. In order to slow down the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, a buffer spring 22 is installed between the first buckle 20 and the second buckle 21. When the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously, the buffer spring 22 will be compressed, that is, the impact force generated when the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously is converted into the elastic potential energy of the buffer spring 22, thereby prolonging the service life of the contact bridge 3.

[0071] The working principle of this embodiment:

[0072] This high-voltage contactor is a pneumatic high-voltage contactor, which is applied to new energy vehicles. It is connected and controlled by the vehicle computer. The pneumatic component 8 controls its closing and opening in a pneumatic manner. The whole control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application. During application, the pneumatic component 8 is connected to an air storage tank beside it. When the pneumatic component 8 inflates or deflates the corrugated airbag 10, it can control the piston 4 to move back and forth in the piston chamber 5 towards the high-voltage contact head 2, and finally control the contact bridge 3 to close or open simultaneously with the two high-voltage contact heads 2.

[0073] Embodiment 4, as Figure 7 shown, the difference between this embodiment and Embodiment 3 is only that, based on Embodiment 3, a cooling kettle 11 is also installed inside the housing 1 and arranged circumferentially around the piston chamber 5. The cooling kettle 11 is filled with a coolant, such as ethylene glycol. Since the corrugated airbag 10 is frequently inflated and deflated, the temperature inside the corrugated airbag 10 and the piston chamber 5 will gradually increase. In order to further reduce the temperature around the piston chamber 5, a cooling kettle 11 is added to cool the periphery of the piston chamber 5.

[0074] Embodiment 5, as Figures 8 to 9As shown, a high-voltage contactor suitable for use in a strong magnetic environment comprises a housing 1; two high-voltage contacts 2 are fixedly mounted on the top of the housing 1, and a contact bridge 3 capable of simultaneously closing or disconnecting the two high-voltage contacts 2 is movably mounted inside the housing 1, wherein the high-voltage contact 2 and the contact bridge 3 are both conductors; a piston 4 made of a non-magnetic material (such as copper, etc.) is concentrically mounted below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a docking port 7 is provided at the bottom of the piston chamber 5, and a hydraulic transmission component 12, such as an integrated water pump for water injection and pumping, is mounted in the docking port 7 through a threaded seal; a sealing ring is mounted on the piston body of the piston 4 to seal against the side wall of the piston chamber 5; a sealing area is formed in the piston chamber 5 between the piston 4 and the docking port 7, and the piston 4 can be controlled to move back and forth in the piston chamber 5 toward the location of the high-voltage contact 2 by injecting or pumping liquid into the sealing area through the hydraulic transmission component 12, and finally the contact bridge 3 and the two high-voltage contacts 2 are controlled to be closed or disconnected simultaneously. The high-voltage contactor adopts hydraulic method to control its closing and opening. The whole control process is not affected by the strong magnetic environment. There will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability when used.

[0075] The liquid injected into the sealing area formed in the piston chamber 5 by the hydraulic transmission component 12 is a coolant, such as ethylene glycol, etc. In order to further reduce the temperature inside and around the piston chamber 5, a coolant such as ethylene glycol is used as a propellant to drive the piston 4, which can reduce the temperature inside and around the piston chamber 5.

[0076] like Figure 9 As shown, the contact bridge 3 and the piston 4 are concentrically connected through the thread of the connecting rod 18, and the lower half of the connecting rod 18 is sleeved with a reset spring 19 that pushes the piston 4 to move toward the butt joint. In order to realize the automatic reset of the piston 4, after the hydraulic assembly is pumped, the piston 4 is pushed to move toward the butt joint under the elastic action of the reset spring 19, and at this time, the contact bridge 3 and the two high-voltage contacts 2 are disconnected at the same time, that is, the high-voltage contactor is automatically disconnected.

[0077] like Figure 9As shown in the figure, a first buckle 20 and a second buckle 21 are concentrically clamped on the upper half of the connecting rod 18. A buffer spring 22 is sleeved on the connecting rod 18 between the first buckle 20 and the second buckle 21. Both the first buckle 20 and the second buckle 21 are insulators. The first buckle 20 is located above the second buckle 21. The contact bridge 3 is fixed on the first buckle 20. The buffer spring 22 pushes the first buckle 20 to move towards the high-voltage contact head 2. In order to reduce the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, a buffer spring 22 is installed between the first buckle 20 and the second buckle 21. When the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously, the buffer spring 22 will be compressed. That is, the impact force generated when the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously is converted into the elastic potential energy of the buffer spring 22, thereby prolonging the service life of the contact bridge 3.

[0078] The working principle of this embodiment:

[0079] This high-voltage contactor is a hydraulic high-voltage contactor, which is applied to new energy vehicles. It is connected and controlled by the vehicle-mounted computer. The hydraulic transmission component 12 controls its closing and opening in a hydraulic manner. The entire control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application. During application, the hydraulic transmission component 12 is connected to a liquid storage tank beside it. When the hydraulic transmission component 12 injects or extracts liquid into the sealed area, it can control the piston 4 to move back and forth in the piston chamber 5 towards the high-voltage contact head 2, and finally control the contact bridge 3 to close or open simultaneously with the two high-voltage contact heads 2.

[0080] Embodiment Six, as Figures 8 to 9 shown, the difference between this embodiment and Embodiment Five is only that, based on Embodiment Five, the liquid injected by the hydraulic transmission component 12 into the sealed area formed in the piston chamber 5 is replaced by a lubricating liquid, such as lubricating oil, etc. In order to further lubricate the piston 4 and reduce the wear and corrosion of the piston 4, it uses a lubricating liquid such as lubricating oil as a booster to drive the piston 4, which can not only lubricate the inner wall of the piston chamber 5, but also reduce the wear and corrosion of the piston 4.

[0081] Embodiment Seven, as Figure 10As shown in the figure, a high-voltage contactor applicable to a strong magnetic environment includes a housing 1; two high-voltage contact heads 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 that can simultaneously close or disconnect the two high-voltage contact heads 2 is movably installed inside the housing 1. Both the high-voltage contact head 2 and the contact bridge 3 are conductors; a piston 4 made of non-magnetic material (such as copper, etc.) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a docking port 7 is opened at the bottom of the piston chamber 5, and a hydraulic transmission component 12, such as an integrated liquid injection and liquid extraction pump, etc., is hermetically installed in the docking port 7 through threads; a corrugated liquid bag 14 is placed in the piston chamber 5 between the piston 4 and the docking port 7, and the lower part of the corrugated liquid bag 14 is hermetically docked with the docking head; a sealed area is formed inside the corrugated liquid bag 14. By injecting or extracting liquid into this sealed area through the hydraulic transmission component 12, the piston 4 can be controlled to move back and forth in the piston chamber 5 towards the high-voltage contact head 2, and finally control the contact bridge 3 to simultaneously close or disconnect from the two high-voltage contact heads 2. This high-voltage contactor controls its closing and opening in a hydraulic manner, and the entire control process is not affected by the strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0082] The liquid injected by the hydraulic transmission component 12 into the sealed area formed inside the corrugated liquid bag 14 is a coolant. In order to further reduce the temperature inside and around the corrugated liquid bag 14, a coolant such as ethylene glycol is used as a booster to drive the expansion of the corrugated liquid bag 14, thereby driving the piston 4, and the temperature inside and around the corrugated liquid bag 14 can be reduced.

[0083] such as Figure 10 As shown in the figure, the contact bridge 3 and the piston 4 are concentrically docked through the threads of a connecting rod 18, and a return spring 19 that pushes the piston 4 towards the docking head is sleeved on the lower half of the connecting rod 18. In order to achieve the automatic reset of the piston 4, after the hydraulic component extracts liquid, the piston 4 moves towards the docking head under the elastic action of the return spring 19. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are simultaneously disconnected, that is, the high-voltage contactor automatically disconnects.

[0084] such as Figure 10As shown in the figure, a first buckle 20 and a second buckle 21 are concentrically clamped on the upper half of the connecting rod 18. A buffer spring 22 is sleeved on the connecting rod 18 between the first buckle 20 and the second buckle 21. Both the first buckle 20 and the second buckle 21 are insulators. The first buckle 20 is located above the second buckle 21. The contact bridge 3 is fixed on the first buckle 20. The buffer spring 22 pushes the first buckle 20 to move towards the high-voltage contact head 2. In order to slow down the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, a buffer spring 22 is installed between the first buckle 20 and the second buckle 21. When the contact bridge 3 contacts the two high-voltage contact heads 2, the buffer spring 22 will be compressed. That is, the impact force generated when the contact bridge 3 contacts the two high-voltage contact heads 2 is converted into the elastic potential energy of the buffer spring 22, thereby extending the service life of the contact bridge 3.

[0085] The working principle of this embodiment:

[0086] This high-voltage contactor is a hydraulic high-voltage contactor, which is applied to new energy vehicles. It is connected and controlled by the vehicle computer. The hydraulic transmission component 12 controls its closing and opening in a hydraulic manner. The entire control process is not affected by a strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application. During application, the hydraulic transmission component 12 is connected to a liquid storage tank beside it. When the hydraulic transmission component 12 injects or extracts liquid into the corrugated liquid bag 14, it can control the piston 4 to move back and forth in the piston chamber 5 towards the high-voltage contact head 2, and finally control the contact bridge 3 to close or open simultaneously with the two high-voltage contact heads 2.

[0087] Embodiment Eight, as Figures 11 to 12As shown in the figure, a high-voltage contactor applicable to a strong magnetic environment includes a housing 1; two high-voltage contact heads 2 are fixedly installed at the top of the housing 1, and a contact bridge 3 that can simultaneously close or disconnect the two high-voltage contact heads 2 is movably installed inside the housing 1, where both the high-voltage contact heads 2 and the contact bridge 3 are conductors; a piston 4 made of non-magnetic material (such as copper, etc.) is concentrically installed below the contact bridge 3, and the piston 4 is located in a piston chamber 5 inside the housing 1; a docking port 7 is opened at the bottom of the piston chamber 5, and a mechanical transmission component 15, such as a single-axis lead screw slide, etc., is installed in the docking port 7 through screws; the single-axis lead screw slide includes a pedestal, a lead screw, a guide rod, a slide seat, and a motor, and the slide seat is driven by the motor to slide along the lead screw and the guide rod; a push rod 16 is fixed on the slide seat; the slide seat is detachably fixed with a push rod 16 that penetrates from the docking port 7 into the piston chamber 5 through screws; the push rod 16 is made of non-magnetic material, and a buffer block 17 is also installed in a limited position on the lower surface of the piston 4 that is abutted by the push rod 16, and the push rod 16 abuts against the buffer block 17; by the push rod 16 on the mechanical transmission component 15 abutting against the piston 4, the piston 4 moves back and forth in the piston chamber 5 towards the location where the high-voltage contact heads 2 are located, and finally controls the contact bridge 3 to simultaneously close or disconnect from the two high-voltage contact heads 2. The high-voltage contactor controls its closing and disconnecting in a mechanical transmission manner, and the entire control process is not affected by the strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability during application.

[0088] As Figure 12 shown, the contact bridge 3 and the piston 4 are concentrically docked through the thread of a connecting rod 18, and a return spring 19 that pushes the piston 4 to move towards the location where the docking head is located is sleeved on the lower half of the connecting rod 18. In order to achieve the automatic reset of the piston 4, after the liquid moving component pumps out the liquid, the piston 4 is pushed by the elastic force of the return spring 19 to move towards the location where the docking head is located. At this time, the contact bridge 3 and the two high-voltage contact heads 2 are simultaneously disconnected, that is, the high-voltage contactor automatically disconnects.

[0089] As Figure 12 shown, a snap-fastener one 20 and a snap-fastener two 21 are concentrically clamped on the upper half of the connecting rod 18. A buffer spring 22 is sleeved on the connecting rod 18 between the snap-fastener one 20 and the snap-fastener two 21, and both the snap-fastener one 20 and the snap-fastener two 21 are insulators; the snap-fastener one 20 is located above the snap-fastener two 21, and the contact bridge 3 is fixed on the snap-fastener one 20, and the buffer spring 22 pushes the snap-fastener one 20 to move towards the location where the high-voltage contact heads 2 are located. In order to reduce the impact force when the contact bridge 3 contacts the two high-voltage contact heads 2, a buffer spring 22 is installed between the snap-fastener one 20 and the snap-fastener two 21. When the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously, the buffer spring 22 will be compressed, that is, the impact force generated when the contact bridge 3 contacts the two high-voltage contact heads 2 instantaneously is converted into the elastic potential energy of the buffer spring 22, thereby prolonging the service life of the contact bridge 3.

[0090] The working principle of this embodiment:

[0091] This high-voltage contactor is a mechanical high-voltage contactor, which is used in new energy vehicles. The vehicle-mounted connection controls the mechanical transmission component 15 to control its closing and disconnection by mechanical transmission. The entire control process is not affected by the strong magnetic environment, and there will be no safety hazards such as control failure caused by strong magnetism. It has better stability and reliability when used. When used, the top rod 16 on the single-axis lead screw slide hits the piston 4, so that the piston 4 moves back and forth in the piston chamber 5 toward the location of the high-voltage contact head 2, and finally controls the contact bridge 3 and the two high-voltage contact heads 2 to close or disconnect at the same time.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage contactor suitable for use in a strong magnetic environment, comprising a housing (1); Two high-voltage contacts (2) are fixedly mounted on the top of the housing (1), and a contact bridge (3) capable of simultaneously closing or opening the two high-voltage contacts (2) is movably mounted inside the housing (1); Features: A piston (4) made of non-magnetic material is coaxially mounted below the contact bridge (3), and the piston (4) is located in a piston chamber (5) inside the housing (1); a docking port (7) is provided at the bottom of the piston chamber (5), and a driving component is mounted in the docking port (7), and the driving component is a pneumatic component (8), a hydraulic transmission component (12) or a mechanical transmission component (15); When the driving component is a pneumatic component (8), a sealing area is constructed in the piston chamber (5) between the piston (4) and the docking port (7), and the pneumatic component (8) can be used to inject or evacuate air into the sealing area to indirectly control the piston (4) to move back and forth in the piston chamber (5) toward the location of the high-voltage contact head (2), thereby ultimately controlling the contact bridge (3) and the two high-voltage contact heads (2) to close or disconnect at the same time; When the driving component is a hydraulic transmission component (12), a sealing area is constructed in the piston chamber (5) between the piston (4) and the docking port (7). By injecting or pumping liquid into or out of the sealing area through the hydraulic transmission component (12), the piston (4) can be indirectly controlled to move back and forth in the piston chamber (5) toward the location of the high-voltage contact head (2), and finally the contact bridge (3) and the two high-voltage contact heads (2) can be controlled to close or disconnect at the same time. When the driving component is a mechanical transmission component (15), the mechanical transmission component (15) can directly control the piston (4) to move back and forth in the piston chamber (5) toward the location of the high-voltage contact head (2), and finally control the contact bridge (3) and the two high-voltage contact heads (2) to be closed or disconnected at the same time.

2. The high voltage contactor suitable for use in a strong magnetic environment according to claim 1, characterized in that: When the driving component is a pneumatic component (8), the structural conditions of the sealing area in the piston chamber (5) are as follows: Condition 1: A sealing ring (9) is installed on the piston (4) to seal against the side wall of the piston chamber (5), and the pneumatic component (8) is sealed and installed on the docking port (7); Or condition 2: a corrugated airbag (10) is placed in the piston chamber (5) between the piston (4) and the docking port (7), and the lower part of the corrugated airbag (10) is sealed and docked with the pneumatic component (8).

3. The high voltage contactor suitable for use in a strong magnetic environment according to claim 2, characterized in that: The pneumatic component (8) is an air pump, which fills the sealed area with gas.

4. The high voltage contactor suitable for use in a strong magnetic environment according to claim 3, characterized in that: A cooling pot (11) is also installed inside the housing (1) and is arranged circumferentially around the piston chamber (5). The cooling pot (11) is filled with cooling liquid.

5. The high voltage contactor suitable for use in a strong magnetic environment according to claim 1, characterized in that: When the driving component is a hydraulic transmission component (12), the structural conditions of the sealing area in the piston chamber (5) are as follows: Condition 1: A sealing ring 2 (13) is installed on the piston body (4) to seal against the side wall of the piston chamber (5), and the hydraulic transmission component (12) is sealed and installed on the docking port (7); Or condition 2: a corrugated liquid bag (14) is placed in the piston chamber (5) between the piston (4) and the docking port (7), and the bottom of the corrugated liquid bag (14) is sealed and docked with the hydraulic transmission component (12).

6. The high voltage contactor suitable for use in a strong magnetic environment according to claim 5, characterized in that: The hydraulic transmission component (12) is a water pump; in the first structural condition of the sealed area in the piston chamber (5), the liquid injected into the sealed area by the water pump is a coolant or a lubricant; in the second structural condition of the sealed area in the piston chamber (5), the liquid injected into the sealed area by the water pump is a coolant.

7. The high voltage contactor suitable for use in a strong magnetic environment according to claim 6, characterized in that: When the driving component is a mechanical transmission component (15), a push rod (16) is detachably fixed on the mechanical transmission component (15) and penetrates from the docking port (7) into the piston chamber (5); the push rod (16) is made of a non-magnetic material, and a buffer block (17) is also installed on the lower surface of the piston (4) abutted by the push rod (16), and the push rod (16) abuts against the buffer block (17).

8. The high voltage contactor suitable for use in a strong magnetic environment according to claim 7, characterized in that: The mechanical transmission component (15) is a single-axis screw slide; the single-axis screw slide comprises a base, a screw, a guide rod, a slide and a motor, and the motor drives the slide to slide along the screw and the guide rod; The push rod (16) is fixed on the slide seat.

9. The high voltage contactor suitable for use in a strong magnetic environment according to any one of claims 4, 6 or 8, characterized in that: The contact bridge (3) and the piston (4) are concentrically connected via a connecting rod (18), and the lower half of the connecting rod (18) is sleeved with a return spring (19) for pushing the piston (4) to move toward the location of the connecting head.

10. The high voltage contactor suitable for use in a strong magnetic environment according to claim 9, characterized in that: The upper part of the connecting rod (18) is coaxially connected with a first buckle (20) and a second buckle (21), wherein the connecting rod (18) is sleeved with a buffer spring (22) located between the first buckle (20) and the second buckle (21); The buckle one (20) is located above the buckle two (21), and the contact bridge (3) is fixed on the buckle one (20), wherein the buffer spring (22) pushes the buckle one (20) to move toward the location of the high-voltage contact head (2).

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