Forced reset excitation contactor and related device

Abstract

The present application provides an excitation contactor and related devices that can be forcibly reset. The excitation contactor is used in a high-current circuit. The excitation contactor includes a moving contact component, a stationary contact component, a first stationary contact, a second stationary contact and an impact component; the stationary contact component includes an iron core and a coil wound on the iron core, and both ends of the coil are respectively connected to a controller; the moving contact component includes a first moving contact and a second moving contact, and an armature connected to the first moving contact and the second moving contact; the first stationary contact is connected to a power supply through a power bus, and the second stationary contact is connected to at least one electrical appliance through the power bus; the coil is used to attract the armature to close according to a first control signal, and the armature drives the first moving contact and the second moving contact to close with the first stationary contact and the second stationary contact respectively; the impact component is used to impact the moving contact component according to the second control signal, so as to forcibly reset the moving contact component when welding occurs.

Description

Technical Field

[0001] The present application belongs to the technical field of emergency protection devices, and specifically relates to an excitation contactor capable of forced reset and related devices. Background Art

[0002] At present, with the rapid development of the new energy industry, high-voltage and high-current DC is widely used in wind, solar and storage, especially in the electric vehicle industry. In order to protect the battery pack and other on-board components, traditional fuses + contactors or excitation fuses + contactors are usually used on the busbar of electric vehicles to achieve overcurrent protection.

[0003] However, when the contacts of traditional contactors are stuck and cannot be separated, it may cause serious accidents such as battery pack fire. The excitation fuse + contactor solution can quickly disconnect the circuit, but once the excitation fuse is triggered, the power bus is completely disconnected, and the electric vehicle can continue to work only after the vehicle circuit is repaired and the excitation fuse is replaced. Summary of the invention

[0004] The present application provides an excitation contactor and related devices that can be forcibly reset, so as to solve the problem of contact welding of the excitation contactor without damaging the power bus, so that the high current circuit can continue to work after the contact is forcibly reset.

[0005] In a first aspect, the present application provides an excitation contactor capable of forced reset, which is applied to a high current circuit, wherein the high current circuit comprises a power supply, the excitation contactor, at least one electrical appliance and a controller, wherein the excitation contactor is connected to the power supply and the at least one electrical appliance via a power bus, and the controller is connected to the excitation contactor;

[0006] The controller is used to output a first control signal to the excitation contactor according to a control strategy, and to send a second control signal to the excitation contactor when a forced reset operation of the contactor needs to be performed;

[0007] The excitation contactor comprises a moving contact component, a stationary contact component, a first stationary contact point, a second stationary contact point and an impact component;

[0008] The stationary contact assembly includes an iron core and a coil wound on the iron core, and two ends of the coil are respectively connected to the controller; the moving contact assembly includes a first moving contact and a second moving contact, and an armature connected to the first moving contact and the second moving contact; the first stationary contact is connected to the power supply through the power bus, and the second stationary contact is connected to the at least one electrical appliance through the power bus;

[0009] The coil is used to attract the armature according to the first control signal, and the armature drives the first moving contact and the second moving contact to close with the first stationary contact and the second stationary contact respectively;

[0010] The impact component is used to impact the moving contact component according to the second control signal, so as to forcibly reset the moving contact component when welding occurs.

[0011] In a second aspect, the present application provides a high current circuit, comprising a power supply, at least one electrical appliance, a controller, and an excitation contactor as described in the first aspect, wherein the excitation contactor is connected to the power supply and the at least one electrical appliance via a power bus, and the controller is connected to the excitation contactor.

[0012] In a third aspect, the present application provides a vehicle comprising the high current circuit as described in the second aspect.

[0013] In a fourth aspect, the present application provides an electronic device comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps of the first aspect of the present application.

[0014] In a fifth aspect, the present application provides a computer storage medium storing a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps described in the first aspect of the present application.

[0015] In a sixth aspect, the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute some or all of the steps described in the first aspect of the present application. The computer program product may be a software installation package.

[0016] It can be seen that in the present application, the controller first outputs a first control signal to the excitation contactor according to the control strategy, and sends a second control signal to the excitation contactor when the excitation contactor forced reset operation needs to be performed; the coil in the excitation contactor attracts the armature according to the first control signal, and the armature drives the first moving contact and the second moving contact to close with the first static contact and the second static contact respectively; the impact component in the excitation contactor impacts the moving contact component according to the second control signal, so as to force the moving contact component to reset when welding occurs. In this way, while solving the welding problem of the excitation contactor contacts, the power bus will not be damaged, so that the high current circuit can continue to work after the contacts are forced to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1a It is a structural schematic diagram of a high current circuit provided in an embodiment of the present application;

[0019] Figure 1b is a schematic diagram of the architecture of a vehicle provided in an embodiment of the present application;

[0020] Figure 1c It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0021] Figure 2 is a structural block diagram of an excitation contactor provided in an embodiment of the present application;

[0022] Figure 3 It is a schematic diagram of the device structure of an excitation contactor provided in an embodiment of the present application;

[0023] Figure 4a is a structural schematic diagram of an initial state of an impact assembly provided by an embodiment of the present application;

[0024] Figure 4b It is a structural schematic diagram of the working state of an impact assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, systems, products or devices.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] The following is an introduction to the relevant terms involved in this application.

[0029] MGG: Microscale gas generator (MGG), a device that instantly generates a large amount of high-pressure gas through explosion.

[0030] Excitation fuse: When the excitation fuse is working normally, the current passes through the through-current bar, which has a small resistance and a strong ability to withstand impact current. When an overload or short circuit occurs, the external control will send an ignition signal to the micro gas generator (MGG) of the excitation fuse. The high-pressure gas generated by the MGG pushes the breaking piece inside the excitation fuse to quickly (less than 3ms) break the copper bar, thereby cutting off the short-circuit current. The excitation fuse relies on the fault current detection device to avoid false operation during normal overload and ensure that the current can be quickly cut off when a real fault occurs.

[0031] At present, when the contacts of traditional contactors are stuck and cannot be separated, it may cause serious accidents such as battery pack fire. The excitation fuse + contactor solution can quickly disconnect the circuit, but once the excitation fuse is triggered, the power bus is completely disconnected. The electric vehicle can continue to work only after the vehicle circuit is repaired and the excitation fuse is replaced.

[0032] To solve the above problems, an embodiment of the present application provides an excitation contactor that can be forcibly reset. The excitation contactor can be used in a high-current circuit to realize the combined function of an excitation fuse + contactor. The controller can output a first control signal to the excitation contactor according to the control strategy, and send a second control signal to the excitation contactor when it is necessary to perform a forced reset operation of the excitation contactor; the coil in the excitation contactor attracts the armature according to the first control signal, and the armature drives the first moving contact and the second moving contact to close with the first static contact and the second static contact respectively; in abnormal circumstances (contactor welding, electrical appliance fire, car collision, etc.), the impact component in the excitation contactor can impact the moving contact component according to the second control signal, so that the excitation contactor is forced to reset quickly. In this way, the excitation contactor can still be reused after solving the problem of excitation contactor welding. This solution can be applicable to a variety of scenarios, including but not limited to the application scenarios mentioned above.

[0033] The following introduces the system architecture involved in the embodiments of the present application.

[0034] See also Figure 1a , including a high current circuit 100, the high current circuit 100 includes a power supply 110, an excitation contactor 120, at least one electrical appliance 130 and a controller 140, the excitation contactor 120 is connected to the power supply 110 and the at least one electrical appliance 130 through a power bus, and the controller 140 is connected to the power supply 110, the excitation contactor 120 and the electrical appliance 130 respectively. The controller 140 is used to output a first control signal to the excitation contactor 120 according to the control strategy, and send a second control signal to the excitation contactor 120 when a forced reset operation of the excitation contactor 120 needs to be performed; please refer to Figure 2 The excitation contactor 120 includes a moving contact component 121, a stationary contact component 122, a first stationary contact 1231, a second stationary contact 1232 and an impact component (such as Figure 2 The first impact assembly 125-1 and the second impact assembly 125-2 in FIG. ...2; please refer to FIG. Figure 3 The stationary contact assembly 122 includes an iron core 1221 and a coil 1222 wound on the iron core 1221, and both ends of the coil 1222 are connected to the controller 140 respectively; the moving contact assembly 121 includes a first moving contact 1211 and a second moving contact 1212, and an armature 1213 connected to the first moving contact 1211 and the second moving contact 1212; the first stationary contact 1231 is connected to the power bus (such as Figure 3 The power bus 1 in the embodiment is connected to the power source 110, and the second static contact 1232 is connected to the power bus (such as Figure 3 The power bus 1') in the circuit is connected to at least one electrical appliance 130; the coil 1222 is used to attract the armature 1213 according to the first control signal, and the armature 1213 drives the first moving contact 1211 and the second moving contact 1212 to close with the first static contact 1231 and the second static contact 1232 respectively; the impact component is used to impact the moving contact component 121 according to the second control signal to force the moving contact component 121 to reset when welding occurs.

[0035] The controller may be a controller in a vehicle-mounted terminal, and is used to perform corresponding processing according to some signals in the high-current circuit, for example, detecting the power bus current to generate a corresponding control signal to the excitation contactor 120 .

[0036] See also Figure 1bThe present application also provides a vehicle 150, which includes the above-mentioned high-current circuit. Under abnormal circumstances (melting of the excitation contactor 120, fire of electrical appliances, car collision, etc.), the impact component in the excitation contactor 120 impacts the moving contact component 121 according to the second control signal, so that the excitation contactor 120 is forced to reset quickly, thereby solving the circuit fault without damaging the normal function of the excitation contactor.

[0037] In addition, the high current circuit 100 may also be a charging circuit in a charging pile, or in other application scenarios that require a high current, and no unique limitation is made here.

[0038] The present application also provides an electronic device 10, such as Figure 1c As shown, it includes at least one processor 11; a display screen 12; and a memory 13, and may also include a communications interface 15 and a bus 14. The processor 11, the display screen 12, the memory 13 and the communications interface 15 can communicate with each other through the bus 14. The display screen 12 is configured to display a preset user guide interface in the initial setting mode. The communications interface 15 can transmit information. The processor 11 can call the logic instructions in the memory 13 to execute the method in the above embodiment.

[0039] Optionally, the electronic device 10 may be a mobile electronic device or other devices, which are not limited to any particular device.

[0040] In addition, the logic instructions in the memory 13 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0041] The memory 13, as a computer-readable storage medium, can be configured to store software programs, computer executable programs, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 11 executes functional applications and data processing by running the software programs, instructions or modules stored in the memory 13, that is, implementing the methods in the above embodiments.

[0042] The memory 13 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created according to the use of the electronic device 10, etc. In addition, the memory 13 may include a high-speed random access memory and may also include a non-volatile memory. For example, a variety of media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, may also be a transient storage medium. The electronic device may be a vehicle-mounted terminal or a mobile terminal in a vehicle, and is not limited to uniqueness here.

[0043] The following is a detailed introduction to the specific example of the excitation contactor.

[0044] See also Figure 2 and Figure 3 The present application also provides an excitation contactor 120 that can be forcibly reset, which is applied to a high-current circuit. The high-current circuit includes a power supply, an excitation contactor 120, at least one electrical appliance and a controller. The excitation contactor 120 is connected to the power supply and at least one electrical appliance through a power bus, and the controller is connected to the excitation contactor 120; the controller is used to output a first control signal to the excitation contactor 120 according to a control strategy, and send a second control signal to the excitation contactor 120 when a forced reset operation of the excitation contactor 120 needs to be performed; the excitation contactor 120 includes a moving contact component 121, a stationary contact component 122, a first stationary contact 1231, a second stationary contact 1232 and an impact component (such as Figure 2 The first impact assembly 125-1 and the second impact assembly 125-2); the static contact assembly 122 includes an iron core 1221 and a coil 1222 wound on the iron core 1221, and both ends of the coil 1222 (such as Figure 3 The first end 2 of the coil and the second end 2' of the coil are respectively connected to the controller; the moving contact component 121 includes a first moving contact 1211 and a second moving contact 1212, and an armature 1213 connected to the first moving contact 1211 and the second moving contact 1212; the first static contact 1231 is connected to the power supply through the power bus, and the second static contact 1232 is connected to at least one electrical appliance through the power bus; the coil 1222 is used to attract the armature 1213 according to the first control signal, and the armature 1213 drives the first moving contact 1211 and the second moving contact 1212 to close with the first static contact 1231 and the second static contact 1232 respectively; the impact component is used to impact the moving contact component 121 according to the second control signal, so as to force the moving contact component 121 to reset when welding occurs.

[0045] In a specific implementation, the control strategy of the controller may be a corresponding instruction generated by a user operating a vehicle-mounted terminal, or may be an instruction generated by the self-operation of a high-current circuit (for example, corresponding instructions generated by detecting power supply status, electrical appliance status, and other working conditions). That is, when the high-current circuit is operating normally, if it involves controlling the excitation contactor 120, a first control signal is output to the coil 1222 of the excitation contactor 120, so that the iron core 1221 generates a magnetic attraction to attract the armature 1213, thereby causing the first moving contact 1211 to contact the first static contact 1231, and the second moving contact 1212 to contact the second static contact 1232, so that the circuit is in a conducting state, so that the electrical appliances in the high-current circuit can operate normally.

[0046] In addition, when the contacts of the excitation contactor 120 are welded or there are other situations where the bus circuit needs to be quickly disconnected, it is determined that the excitation contactor 120 needs to be forced to reset. Specifically, under normal working conditions, when the controller stops outputting the first control signal to the coil, the iron core 1221 loses its magnetic force, and then the spring (such as Figure 3 Under the action of the rebound force of the first spring 1216 and the second spring 1217), the armature 1213 is separated from the iron core 1221; at the same time, the first moving contact and the second moving contact are separated from the first static contact and the second static contact as the armature 1213 is separated from the iron core 1221; however, when welding occurs, even if the controller stops outputting the first control signal to the coil, the two pairs of contacts will not separate. At this time, if the control still detects the power bus current after the preset time, the second control signal is output to the impact component, driving the impact component to impact the moving contact component, and forcibly resetting the moving contact component before the contacts are completely welded, so that the moving contact component is separated from the static contact component.

[0047] It can be seen that in this embodiment, the controller first outputs a first control signal to the excitation contactor 120 according to the control strategy, and sends a second control signal to the excitation contactor 120 when it is necessary to perform a forced reset operation of the excitation contactor 120; the coil 1222 in the excitation contactor 120 attracts the armature 1213 according to the first control signal, and the armature 1213 drives the first moving contact 1211 and the second moving contact 1212 to close with the first static contact 1231 and the second static contact 1232 respectively; the impact component in the excitation contactor 120 impacts the moving contact component according to the second control signal to force the moving contact component to reset when welding occurs. In this way, while solving the welding problem of the contacts of the excitation contactor 120, the power bus will not be damaged, so that the high current circuit can continue to work after the contacts are forced to reset. In addition, since in this embodiment, a single excitation contactor 120 realizes the function of the excitation fuse + contactor in the prior art, the occupied space is reduced and the cost is reduced.

[0048] In a possible embodiment, two opposite side surfaces of the armature 1213 are respectively provided with extension pieces, and an impact assembly is provided under the extension piece. The impact object of the impact assembly is the extension piece, and the shape and position of the extension piece adaptively change with the shape and position of the impact assembly, which is not limited here.

[0049] In the specific implementation, Figure 3 As shown, a pair of symmetrical extensions extend from the armature 1213, and the impact assembly is arranged opposite to the extensions, that is, there are two extensions (such as Figure 3 The first extension piece 1214 and the second extension piece 1215 in the embodiment are provided with two impact assemblies. Figure 4a and Figure 4b As shown, the impact assembly includes a sleeve 21, in which a penetration cavity is provided, one side opening of the penetration cavity forms a volume cavity with the cavity wall, a micro gas generator MGG is provided in the volume cavity, and an impact piece is provided in the penetration cavity, the impact piece is clamped on the cavity wall through a sealing ring 24, and the impact piece body extends out of the other side opening of the penetration cavity; the other side opening is provided with a first limit piece 25 extending from the cavity wall of the penetration cavity; a spring 26 is sleeved on the impact piece, and the two ends of the spring 26 are respectively abutted on the impact piece and the first limit piece 25; wherein, the penetration cavity space between the impact piece and the micro gas generator forms a gas ignition space 29; when the micro gas generator is ignited, the explosion gas pushes the impact piece out of the other side opening to impact the moving contact assembly, so as to force the moving contact assembly to reset when welding occurs.

[0050] For details, please continue to refer to Figure 3 , Figure 4a and Figure 4b , the micro gas generator includes a first control terminal 3 and a second control terminal 3', and the first control terminal and the second control terminal are both connected to the controller to receive a second control signal; when the micro gas generator MGG receives the second control signal, the micro gas generator MGG is detonated to generate explosive gas, so that the gas in the detonation space 29 expands rapidly, and the impact piece is pushed out of the other side opening of the penetration cavity, so that the impact piece hits the corresponding extension piece, and the impact force forces the entire moving contact assembly to reset, and releases the adhesion state caused by the welding between the moving contact and the static contact. At the same time, the impact force is calculated according to the structural strength of the extension piece and the structural force of the contact adhesion, so that the overall structure satisfies the following inequality: the bearing capacity of the extension piece> the impact force> the adhesion force of the contact adhesion; in this way, the moving and static contacts are separated before they are completely adhered, and the overall structure is not damaged after the moving contact assembly is forced to reset, so that the excitation contactor 120 can continue to be used, and the vehicle is prevented from failing and being unable to drive due to the welding of the excitation contactor 120.

[0051] For example, in the excitation contactor 120, one or more groups of micro gas generators MGG can be set, and the number of micro gas generators MGG in each group can be two, which can be specifically set according to the needs of the excitation contactor 120; in addition, the two micro gas generators MGG can be connected in series or in parallel, as long as the MGG trigger circuit requirements and time requirements are met, and no unique limitation is made here.

[0052] For further information, please refer to Figure 4a and Figure 4b The impact piece includes a connecting piece 231 and a second limiting piece 232. An annular groove 28 is provided at one end of the connecting piece 231. The annular groove 28 is used to sleeve the annular sealing ring 24. The other end of the connecting piece 231 is connected to the second limiting piece 232. A spring 26 is sleeved on the connecting piece 231. The second limiting piece 232 and the first limiting piece 25 are abutted against each other to limit the impact piece from falling into the penetration cavity.

[0053] In a specific implementation, the connecting piece 231 of the impact piece can move in the opening on the other side of the penetration cavity. The first limiting piece 25 is used to limit the impact piece from completely rushing out of the opening on the other side. The second limiting piece 232 is used to limit the impact piece from completely falling into the penetration cavity. The corresponding first stroke is set by designing the size of the impact piece.

[0054] In one possible embodiment, when it is determined that a forced reset operation of the excitation contactor needs to be performed, a prompt message is generated by the controller and displayed on the screen of the vehicle terminal, for example, "The vehicle has a circuit abnormality, please check the fault in time."

[0055] Table 1 Loss comparison table

[0056] Welding current Loss First welding current 1 Second welding current 2 The third welding current 3 ··· ···

[0057] Table 2 Health score comparison table

[0058] Health points Handling opinions 10～8 Prompt failure 7～4 Tips for checking 3～1 Prompt replacement 0 Damage Tips

[0059] Furthermore, a loss score correspondence table (Table 1) and a health score query table (Table 2) are stored in the controller. Table 1 includes the correspondence between the welding current and the loss score. The welding current refers to the current at which welding may occur, that is, the current greater than the preset value. The loss score is used to indicate the degree of loss of the moving contact and the static contact when the contact adhesion problem is solved by the impact component.

[0060] As shown in Table 1, when the controller determines that welding occurs, the corresponding loss points are determined according to the current welding current, and then the current health points are determined. The loss points are subtracted from the health points to obtain the remaining health points. The processing opinions corresponding to the health points in Table 2 are then queried, and the corresponding processing opinions are displayed in the vehicle terminal to provide users with corresponding processing strategies to avoid the user being unable to know the condition of the excitation contactor 120, resulting in sudden damage to the excitation contactor 120, making the vehicle unusable.

[0061] For example, when welding occurs for the first time, since welding has not occurred before, the current health score is the initial health score (assuming it is 10 points), and the loss score of this time is 2 points according to the current (assuming it is the second welding current). The initial health score is subtracted from the loss score to obtain the remaining health score of this time, that is, 8 points. Then, according to the remaining health score of this time, Table 2 is queried, and the handling opinion is to prompt a fault. Then, a first prompt message is generated to prompt the user that a fault has occurred, and the first prompt message is displayed on the screen of the vehicle terminal. When welding occurs for the second time, the current health score is the remaining health score of the first time, that is, 8 points. If the welding current of this time is the first welding current, the remaining health score of this time becomes 7 points. Therefore, it can be seen from Table 2 that the handling opinion is to prompt for inspection, and the second prompt message is generated, and the second prompt message is displayed on the screen of the vehicle terminal to prompt the user to detect the actual loss of the excitation contactor 120 as soon as possible. If the damage is serious, the user can also replace it in time to avoid accidents. Similarly, after each welding occurs, the health score is recalculated, and the corresponding treatment advice is queried and provided to the user. When the health score reaches 3 points or below, the user is prompted to replace the excitation contactor 120.

[0062] Specifically, the corresponding relationship in Table 1 can be predicted by data statistics or neural network models. The welding current and contact loss degree are collected each time welding occurs, and the contact loss degree is quantified into a corresponding score value. Then, the neural network model is trained to obtain a corresponding relationship prediction model. According to the model, the corresponding relationship in Table 1 can be predicted. Then, corresponding processing opinions can be configured according to different situations.

[0063] In addition, different reminder frequencies can be set according to different scores in each processing opinion stage. If the user does not take corresponding measures according to the processing opinions, a certain reminder will be given at preset intervals. The reminder frequency can be increased according to different stages.

[0064] It can be seen that in this embodiment, the degree of wear of the contacts of the excitation contactor 120 can be monitored, and corresponding processing suggestions can be provided to the user, thereby improving the intelligence of the high-current circuit of the excitation contactor 120.

[0065] For further information, please refer to Figure 4a and Figure 4b An air hole 27 is provided on the cavity wall of the penetration cavity. When no gas explosion occurs in the blasting space 29, the air hole 27 is outside the blasting space 29. After the gas explosion occurs in the blasting space 29, the explosion gas pushes the impact member to expand the blasting space 29 so as to accommodate the air hole 27 within the range of the blasting space 29. The air hole 27 is used to guide the explosion gas out of the blasting space 29.

[0066] In a specific implementation, when no gas explosion occurs in the ignition space 29, since the air hole 27 is outside the ignition space 29 and there is no explosion gas, no gas is discharged from the air hole 27. When the micro gas generator MGG is detonated, causing the gas in the ignition space 29 to expand, the explosion gas pushes the impact piece so that the air hole 27 falls into the range of the ignition space 29. At this time, the explosion gas can be discharged from the air hole 27.

[0067] For details, please continue to refer to Figure 3 , Figure 4a and Figure 4b The excitation contactor 120 also includes an arc extinguishing gas duct, which is connected to the air hole 27. The explosion gas is guided to the first connection 128 or the second connection 129 through the air hole 27. The first connection 128 is the connection between the first moving contact 1211 and the first static contact 1231, and the second connection 129 is the connection between the second moving contact 1212 and the second static contact 1232.

[0068] like Figure 3 In this embodiment, the excitation contactor 120 includes a first impact component 125-1 and a second impact component 125-2. The first air hole 27 of the first impact component 125-1 is connected to the first arc extinguishing gas channel 124-1, and the first arc extinguishing gas channel 124-1 leads to the first connection 128; the second air hole 27 of the second impact component 125-2 is connected to the second arc extinguishing gas channel 124-2, and the second arc extinguishing gas channel 124-2 leads to the second connection 129. The explosive gas acts as an arc extinguishing gas to extinguish the arc at the contact connection, thereby enhancing the arc extinguishing effect and increasing the arc extinguishing speed, thereby reducing the possibility of safety risks in the circuit.

[0069] For example, the first stroke of the impact piece and the second stroke of the arc extinguishing gas reaching the first connection 128 or the second connection 129 are calculated, and the first time used for the first stroke and the second time used for the second stroke are adjusted to be consistent, that is, when the impact piece hits the extension piece, the arc extinguishing gas reaches the first connection 128 or the second connection 129 at the same time, so as to enhance the arc extinguishing effect, increase the arc extinguishing speed, and enable the arc extinguishing operation to be carried out in a timely manner.

[0070] In a possible embodiment, the excitation contactor 120 also includes a first arc extinguishing device 126 arranged at a first connection 128 or a second arc extinguishing device 127 at a second connection 129, the arc extinguishing device being used to extinguish the arc when the excitation contactor is normally disconnected and attracted, and to extinguish the arc together with the arc extinguishing gas after the micro gas generator MGG is detonated; the first connection 128 is the connection between the first moving contact 1211 and the first static contact 1231, and the second connection 129 is the connection between the second moving contact 1212 and the second static contact 1232.

[0071] In a specific implementation, the first connection 128 and the second connection 129 are respectively provided with corresponding first arc extinguishing devices 126 and second arc extinguishing devices 127, and arc extinguishing is performed by combining the arc extinguishing devices with arc extinguishing gas to improve the arc extinguishing capability of the excitation contactor 120. It can be understood that the type of arc extinguishing device is not limited in this embodiment, and it only needs to be able to adapt to the excitation contactor 120.

[0072] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the mobile electronic device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiment provided in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0073] The embodiment of the present application can divide the electronic device into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0074] The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

[0075] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, wherein the computer program enables a computer to execute part or all of the steps of any method described in the above method embodiments, and the above computer includes an electronic device.

[0076] The embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, the computer program is operable to cause a computer to execute some or all of the steps of any method described in the method embodiment. The computer program product may be a software installation package, and the computer includes an electronic device.

[0077] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0078] In the several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are merely schematic; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0079] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0080] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0081] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a volatile memory or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM) and direct RAM bus RAM (DR RAM). Various media that can store program code are available.

[0082] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions without departing from the spirit and scope of the present invention, and can make various changes and modifications, including the combination of the above-mentioned different functions and implementation steps, including software and hardware implementation methods, all of which are within the scope of protection of the present invention.

Claims

1. An excitation contactor capable of forced reset, characterized in that: Applicable to a high current circuit, the high current circuit comprises a power supply, the excitation contactor, at least one electrical appliance and a controller, the excitation contactor is connected to the power supply and the at least one electrical appliance via a power bus, and the controller is connected to the excitation contactor; The controller is used to output a first control signal to the excitation contactor according to a control strategy, and to send a second control signal to the excitation contactor when a forced reset operation of the excitation contactor needs to be performed; The excitation contactor comprises a moving contact component, a stationary contact component, a first stationary contact point, a second stationary contact point and an impact component; The stationary contact assembly includes an iron core and a coil wound on the iron core, and two ends of the coil are respectively connected to the controller; the moving contact assembly includes a first moving contact and a second moving contact, and an armature connected to the first moving contact and the second moving contact; the first stationary contact is connected to the power supply through the power bus, and the second stationary contact is connected to the at least one electrical appliance through the power bus; The coil is used to attract the armature according to the first control signal, and the armature drives the first moving contact and the second moving contact to close with the first stationary contact and the second stationary contact respectively; The impact component is used to impact the moving contact component according to the second control signal, so as to forcibly reset the moving contact component when welding occurs; The impact assembly comprises a sleeve, a penetration cavity is arranged in the sleeve, one side opening of the penetration cavity forms a volume cavity with the cavity wall, a micro gas generator is arranged in the volume cavity, an impact piece is arranged in the penetration cavity, the impact piece is clamped on the cavity wall through a sealing ring, and the impact piece body extends out of the other side opening of the penetration cavity; The other side opening is provided with a first stopper extending from the wall of the penetration cavity; a spring is sleeved on the impact member, and two ends of the spring are respectively disposed on the impact member and the first stopper; wherein the penetration cavity space between the impact member and the micro gas generator forms a gas ignition space; When the micro gas generator explodes, the explosion gas pushes the impact piece out from the other side opening to impact the moving contact component, so as to force the moving contact component to reset when welding occurs.

2. The forced resettable excitation contactor according to claim 1, characterized in that: Two side surfaces of the armature that are opposite to each other are respectively provided with extension pieces, the impact assembly is arranged under the extension pieces, and the impact object of the impact assembly is the extension piece.

3. The forced resettable excitation contactor according to claim 1, characterized in that: The micro gas generator comprises a first control end and a second control end, wherein the first control end and the second control end are both connected to the controller to receive the second control signal; The micro gas generator is used to ignite and explode upon receiving a second control signal to generate the explosion gas.

4. The forced resettable excitation contactor according to claim 1, characterized in that: The wall of the penetration cavity is provided with an air hole; when no gas explosion occurs in the blasting space, the air hole is outside the blasting space; after the gas explosion occurs in the blasting space, the explosion gas pushes the impact member to expand the blasting space so as to accommodate the air hole within the range of the blasting space; The air hole is used to guide the explosion gas out of the ignition space.

5. The forced resettable excitation contactor according to claim 1, characterized in that: The impact member includes a connecting member and a second limiting member. An annular groove is provided at one end of the connecting member, and the annular groove is used to sleeve an annular sealing ring. The other end of the connecting member is connected to the second limiting member. The spring is sleeved on the connecting member. The second limiting member is abutted against the first limiting member to limit the impact member from falling into the penetration cavity.

6. The forced resettable excitation contactor according to claim 4, characterized in that: The excitation contactor also includes an arc extinguishing air duct, which is connected to the air hole, and guides the explosion gas to a first connection point or a second connection point through the air hole. The first connection point is the connection point between the first moving contact and the first static contact, and the second connection point is the connection point between the second moving contact and the second static contact.

7. The forced resettable excitation contactor according to claim 4 or 6, characterized in that: The excitation contactor also includes an arc extinguishing device arranged at a first connection or a second connection, and the arc extinguishing device is used to extinguish the arc together with the arc extinguishing gas. The first connection is the connection between the first moving contact and the first static contact, and the second connection is the connection between the second moving contact and the second static contact.

8. A high current circuit, characterized in that: It comprises a power supply, at least one electrical appliance, a controller and an excitation contactor as described in any one of claims 1 to 7, wherein the excitation contactor is connected to the power supply and the at least one electrical appliance via a power bus, and the controller is connected to the excitation contactor.

9. A vehicle, characterized in that: Comprising the high current circuit as claimed in claim 8.

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