Electric washing circuit and relay electric washing equipment

Abstract

The utility model relates to the technical field of relays, in particular to an electric washing circuit and relay electric washing equipment, and the electric washing circuit comprises a pulse current module which comprises a first input end, a first output end and at least two constant current substrates, and the at least two constant current substrates are located between the first input end and the first output end and are arranged in parallel, the first output end is used for outputting electric washing pulse current; and the power supply module is connected with the first input end of the pulse current module. According to the scheme, the flexibility of relay electric washing control can be improved, and the accuracy of relay testing is improved.

Description

Technical Field

[0001] The present application relates to the field of relay technology, and in particular to an electric washing circuit and a relay electric washing device. Background Art

[0002] A relay is an electrical switching device used to control the on / off switching of a circuit. It operates by utilizing the effect of an electromagnet. When input current flows through a coil, the electromagnet generates a magnetic field, which in turn attracts or releases connected mechanical contacts, thereby opening or closing the circuit. Relays are used in practical technologies such as automated control, circuit protection, signal transmission, and electrical systems. They offer electrical isolation, high reliability, and the ability to control high-power loads. These characteristics make relays important in numerous fields, including industrial control, automotive electronics, and household appliances.

[0003] With the vigorous development of new energy vehicles, the requirements for the reliability of on-board relays are becoming increasingly higher. In order to evaluate the performance, stability and life of relays under different working conditions and ensure their effectiveness and safety in actual applications, a series of reliability testing processes are usually set up. Traditional relay testing methods cannot meet the reliability requirements of existing on-board relays. Relay electric washing test has gradually become a major part of reliability testing in the new energy vehicle industry.

[0004] In the related art, the relay electric cleaning equipment outputs pulse current to the relay contacts through resistor voltage division, thereby meeting the demand of cleaning the relay contacts with large current.

[0005] However, the applicant has found that the current relay electric washing equipment has the following technical problems:

[0006] Existing relay electrowashing equipment has difficulty in achieving accurate current output, resulting in poor flexibility and electrowashing effect of relay electrowashing. Summary of the Invention

[0007] Based on this, it is necessary to provide an electric washing circuit and relay electric washing equipment that can improve the flexibility of relay electric washing control and improve the accuracy of relay testing.

[0008] The present invention provides an electrowashing circuit from a first aspect, the electrowashing circuit comprising:

[0009] A pulse current module includes a first input end, a first output end, and at least two constant current substrates, wherein the at least two constant current substrates are located between the first input end and the first output end and are arranged in parallel, and the first output end is used to output an electrowashing pulse current;

[0010] The power supply module is connected to the first input terminal of the pulse current module.

[0011] In one embodiment, each of the constant current substrates includes a plurality of constant current output units, and the plurality of constant current output units are connected in parallel.

[0012] In one embodiment, the constant current output unit includes a first amplifier, a second amplifier and a switching tube, the first amplifier is connected to the second amplifier and is used to output a control signal to the switching tube, the source end of the switching tube is connected to the first input end, the drain end of the switching tube is connected to the first output end, and the gate end of the switching tube is connected to the output end of the second amplifier.

[0013] In one embodiment, the power module includes:

[0014] Constant current source unit;

[0015] A capacitor unit is connected in parallel with the constant current source unit. The capacitor unit is charged based on the current output by the constant current source unit and outputs a pulse current for electrowashing the relay to be tested. The instantaneous value of the pulse current is greater than the current value output by the constant current source unit.

[0016] In one embodiment, the electrowashing circuit further comprises:

[0017] The control module is connected to both the power supply module and the pulse current module, and is used to control the current source signal output by the power supply module, and is also used to output a control signal to the pulse current module, wherein the control signal is used to realize output control of the pulse current module.

[0018] In one embodiment, the control module includes:

[0019] A coil setting circuit, connected to the coil of the relay to be tested, for controlling the operating parameters of the coil of the relay to be tested;

[0020] A coil acquisition circuit is connected to the coil of the relay to be tested and is used to obtain the coil voltage and / or coil current of the relay to be tested;

[0021] a coil control bridge circuit, connected to the coil of the relay to be tested, for outputting a control signal to the coil of the relay to be tested, wherein the coil control bridge circuit is adapted to the coil structure of the relay to be tested;

[0022] a contact setting circuit, connected to the pulse current module, and configured to output the control signal to the pulse current module;

[0023] a contact current acquisition circuit, connected to the pulse current module, for acquiring the current value of the current signal output by the pulse current module;

[0024] The contact voltage acquisition circuit is connected to the contact of the relay to be tested and is used to obtain voltage values ​​at two ends of the contact of the relay to be tested.

[0025] In one embodiment, the electrowashing circuit further comprises:

[0026] The current acquisition module is connected to the relay to be tested and is used to obtain the current value flowing through the contacts of the relay to be tested.

[0027] In one embodiment, the electrowashing circuit further includes a heat dissipation module, the constant current substrate is fixed to the heat dissipation module, and the heat dissipation module is used to achieve heat exchange between the constant current substrate and a heat exchange medium.

[0028] In one embodiment, the electrowashing circuit further comprises:

[0029] a first switch unit, provided between the constant current source unit and the capacitor unit, for controlling a charging state of the capacitor unit;

[0030] a second switch unit, provided between the capacitor unit and the relay to be tested, for controlling the current output state of the relay to be tested;

[0031] The third switch unit is provided between the capacitor unit and the pulse current module, and is used to control the discharge state of the capacitor unit.

[0032] The present invention provides a relay electric washing device from a second aspect, comprising an electric washing circuit according to any one of the first aspects.

[0033] The above-mentioned electric washing circuit and relay electric washing device can achieve the following beneficial effects corresponding to the technical problems raised in the background technology by deducing the technical features:

[0034] The present solution provides an electrowashing circuit, including a pulse current module and a power supply module, wherein the pulse current module includes a constant current substrate, a first input terminal and a first output terminal. Specifically, a plurality of constant current substrates connected in parallel are provided in the pulse current module, and the input and output terminals of the constant current substrate are linked to input and output through the first input terminal and the first output terminal, which helps to precisely control the output value of the current while meeting the output demand of large current, thereby meeting the electrowashing processing requirements of relays of different specifications and improving the compatibility of relay electrowashing equipment. In implementation, the large current output demand of the pulse current module is differentiated to each constant current substrate, and multi-channel shunt control is performed in each constant current substrate, so that the overall control of the large current output can be achieved by controlling each constant current substrate, while improving the accuracy and efficiency of the current output control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. 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 creative work.

[0036] Figure 1 This is a structural diagram of an electric washing circuit in one embodiment of the present application;

[0037] Figure 2 This is a structural diagram of a pulse current module in one embodiment of the present application;

[0038] Figure 3 This is a structural diagram of a constant current substrate in one embodiment of the present application;

[0039] Figure 4 This is a connection diagram of a constant current output unit in one embodiment of the present application;

[0040] Figure 5 Schematic diagram of the structure of the control module in one embodiment of the present application.

[0041] Explanation of the accompanying drawings: 100, pulse current module; 101, constant current substrate; 1011, constant current output unit; 102, first input terminal; 103, first output terminal; 104, heat dissipation module; 200, power supply module; 201, constant current source unit; 202, capacitor unit; 300, control module; 301, coil setting circuit; 302, coil acquisition circuit; 303, coil control bridge circuit; 304, contact setting circuit; 305, contact current acquisition circuit; 306, contact voltage acquisition circuit. DETAILED DESCRIPTION

[0042] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0044] It will be understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of this application. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0045] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0046] It is understood that “at least one” refers to one or more, “a plurality” refers to two or more, and “at least a portion of an element” refers to a portion or all of an element.

[0047] As used herein, the singular forms "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include," "comprising," "having," and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the relevant listed items.

[0048] This application is made by the inventor based on his understanding and research of the following issues:

[0049] A relay is an electrical switching device used to control the on / off switching of a circuit. It operates by utilizing the effect of an electromagnet. When input current flows through a coil, the electromagnet generates a magnetic field, which in turn attracts or releases connected mechanical contacts, thereby opening or closing the circuit. Relays are used in practical technologies such as automated control, circuit protection, signal transmission, and electrical systems. They offer electrical isolation, high reliability, and the ability to control high-power loads. These characteristics make relays important in numerous fields, including industrial control, automotive electronics, and household appliances.

[0050] The application scenario of the present invention is mainly the reliability test of relays used in automobiles during the production process. During the production process, the contact surface of the relay contact has burrs and surface oxides, which need to be removed by high current pulses to make its conductive performance better. For example, the impedance of the relay contact that has not been electrowashed is about 100mΩ, but through the electrowashing treatment of high current pulses, the contacts produce an arc effect under the action of high current pulses, melting the burrs and surface oxides, making the contact contact tighter, and reducing the impedance of the relay contact to about 10mΩ. The relay electrowashing equipment can also detect abnormal products such as relay contact adhesion and relay coil breakage. The relay electrowashing equipment can set the constant current value according to the customer's requirements for how much current the relay contact can withstand, and can set the frequency, duty cycle and number of pulses of the constant current pulse, thereby realizing a kind of extreme aging test. If the number of pulses is too many, the relay contacts will continue to arc, which may melt and burn all the relay contacts. In an exemplary implementation scenario, a pulse current of 400 A, a duty cycle of 20%, a frequency of 10 Hz, and 100 pulses can be set to achieve the effect of electric washing of the relay without burning the relay contacts.

[0051] In the related art, the relay electric cleaning equipment outputs pulse current to the relay contacts through resistor voltage division, thereby meeting the demand of cleaning the relay contacts with large current.

[0052] However, the applicant has found that the current relay electric washing equipment has the following technical problems:

[0053] Existing relay electrowashing equipment has difficulty in achieving accurate current output, resulting in poor flexibility and electrowashing effect of relay electrowashing.

[0054] Based on the above problems, the present application provides an electric washing circuit and a relay electric washing device.

[0055] In one embodiment, the Figure 1 As shown, Figure 1 , an electrowashing circuit is shown, including a pulse current module 100 and a power supply module 200 .

[0056] The pulse current module 100 includes a first input terminal 102, a first output terminal 103, and at least two constant current substrates 101. The at least two constant current substrates 101 are located between the first input terminal 102 and the first output terminal 103, and the constant current substrates 101 are arranged in parallel. The first output terminal 103 is used to summarize and output the electrowashing pulse current.

[0057] The constant current substrate 101 is used to output a constant current signal. A plurality of constant current substrates 101 are provided in the pulse current module 100 , and the plurality of constant current substrates 101 are connected in parallel.

[0058] The power supply module 200 is connected to the first input terminal 102 of the pulse current module 100 .

[0059] Specifically, you can Figure 2 As shown, the pulse current module 100 is provided with a plurality of constant current substrates 101, each constant current substrate 101 can independently output a current signal. Based on the parallel relationship between the constant current substrates 101, the current signals output from all constant current substrates 101 can be accumulated to obtain an electrowashing pulse current with a larger current value. Exemplarily, the number of constant current substrates 101 can be 5, 10, etc. The specific number of constant current substrates 101 can be determined according to the output performance requirements of the pulse current module 100.

[0060] The first input terminal 102 is connected to the input terminal of the constant current substrate 101 and is used to input a current source signal to the constant current substrate 101 .

[0061] Specifically, the first input terminal 102 is used to input a current source signal to the constant current substrate 101. Since multiple constant current substrates 101 are provided in the pulse current module 100, multiple constant current substrates 101 are commonly connected to the same first input terminal 102. Exemplarily, the first input terminal 102 can be connected to a conductive transmission body made of a conductive medium, such as a copper pillar, a copper bar, etc. Taking a copper pillar as an example, the first input terminal 102 can be connected to a copper pillar body, and a plurality of small copper pillars can extend from the copper pillar to connect to the constant current substrate 101, thereby realizing the simultaneous input of current source signals to multiple constant current substrates 101.

[0062] The first output terminal 103 is connected to the output terminal of the constant current substrate 101 and is used to output an electrowashing pulse current.

[0063] Specifically, the first output terminal 103 is used to collect the current signal output by the constant current substrate 101. Since there are multiple constant current substrates 101 in the pulse current module 100, multiple constant current substrates 101 can be connected to the same first output terminal 103. Exemplarily, the first output terminal 103 can be connected to a conductive transmission body made of a conductive medium, such as a copper column, a copper bar, etc. Taking the copper column as an example, the first output terminal 103 can be connected to a copper column body, and several small copper columns can extend from the copper column to connect to the constant current substrate 101, thereby accessing the electrowashing pulse current output by the constant current substrate 101. The current signals output by each constant current substrate 101 in parallel are collected at the first output terminal 103, thereby being able to form the large current required for relay electrowashing.

[0064] By implementing the above-mentioned electric washing circuit, the following beneficial effects can be achieved:

[0065] This solution provides an electrowashing circuit, including a pulse current module 100 and a power supply module 200, wherein the pulse current module 100 includes a constant current substrate 101, a first input terminal 102 and a first output terminal 103. Specifically, a plurality of constant current substrates 101 connected in parallel are provided in the pulse current module 100, and the input and output terminals of the constant current substrate 101 are linked to input and output through the first input terminal 102 and the first output terminal 103, which helps to finely control the output value of the current while meeting the output demand of large current, thereby meeting the electrowashing processing requirements of relays of different specifications and improving the compatibility of relay electrowashing equipment. In implementation, the large current output demand of the pulse current module 100 is differentiated to each constant current substrate 101, and multiple shunt controls are performed in each constant current substrate 101, so that the overall control of the large current output can be achieved by controlling each constant current substrate 101, while improving the accuracy and efficiency of the current output control.

[0066] In one embodiment, the Figure 3 As shown, each constant current substrate 101 includes a plurality of constant current output units 1011 , and the plurality of constant current output units 1011 are connected in parallel.

[0067] Specifically, a plurality of constant current output units 1011 may be provided in each constant current substrate 101, and the ports of each constant current output unit 1011 may include an input terminal, an output terminal, and a control terminal. The input terminal is used to input a current source signal, the output terminal is used to output a constant current signal, and the control terminal is used to receive a current setting signal. The current setting signal can be used to control the current value, duty cycle, etc. of the current signal output by the constant current output unit 1011. The current setting signal can also be used to control the conduction state of the constant current output unit 1011.

[0068] In one embodiment, the Figure 4 As shown, the constant current output unit 1011 includes a first amplifier A1, a second amplifier A2 and a switch tube N1.

[0069] The first amplifier A1 is connected to the second amplifier A2 and is used to output a control signal to the switch tube N1. The drain of the switch tube N1 is connected to the first input terminal 102, the source of the switch tube N1 is connected to the first output terminal 103, and the gate terminal of the switch tube N1 is connected to the output terminal of the second amplifier A2.

[0070] The first amplifier A1 serves as a first-stage amplifier to form a proportional amplifier circuit, and the second amplifier A2 serves as a second-stage amplifier to form a constant current circuit.

[0071] Specifically, the non-inverting input of the first amplifier A1 is connected to the control terminal of the constant current output unit 1011, and the inverting input is grounded via a resistor. The non-inverting input of the second amplifier A2 is connected to the output of the first amplifier A1, and the inverting input is connected to the source of the switch N1. The output of the second amplifier A2 is connected to the gate of the switch N1. The drain of the switch N1 is connected to the input of the constant current output unit 1011, and the source is also connected to the output of the constant current output unit 1011.

[0072] In this way, the current setting signal connected to the control terminal of the constant current output unit 1011 is output to the switch tube N1 through the first amplifier A1 and the second amplifier A2, thereby controlling the conduction state of the switch tube N1. Since the switch tube N1 is arranged in the output loop of the current signal between the first input terminal 102 and the first output terminal 103, the output of the constant current output unit 1011 is controlled.

[0073] In this embodiment, the output stability and linearity of the constant current output unit 1011 are improved by two operational amplifiers connected in series. The precise control of each constant current output unit 1011 can also be achieved through a switch tube, thereby improving the flexibility of the pulse current module 100.

[0074] In one embodiment, the Figure 1 As shown, the power module 200 includes a constant current source unit 201 and a capacitor unit 202 .

[0075] The constant current source unit 201 is used to output a current source signal according to a preset instruction.

[0076] Specifically, the constant current source unit 201 can be an editable high-power digital power supply, which can be used to output a current source signal for the power module 200 , to supply power to the control module 300 , and to charge the capacitor unit 202 with electric energy.

[0077] For example, the constant current source unit 201 in this embodiment can be set to different operating modes, including a constant current mode, a voltage mode, etc. The power module 200 is connected to the control module 300, and while supplying power to the control module 300, the controlled and control module 300 outputs a current source signal.

[0078] Among them, the capacitor unit 202 is connected in parallel with the constant current source unit 201, and is used to store electricity and output a pulse current for electrowashing the relay to be tested based on the current source signal output by the constant current source unit 201. The instantaneous value of the pulse current is greater than the effective value of the current source signal.

[0079] Specifically, the capacitor unit 202 can be a supercapacitor with high capacity specifications. The capacitor unit 202 is connected in parallel with the constant current source unit 201, so that it can be charged when the constant current source unit 201 outputs a constant current or a constant voltage. During this process, the voltage across the capacitor unit 202 can be increased to the same as the output voltage of the constant current source unit 201. After the constant current source unit 201 stops outputting, the capacitor unit 202 can output a large pulse current for electrowashing the relay to be tested. The instantaneous value of the pulse current is higher than the effective value of the current source signal, thereby meeting the needs of relay electrowashing.

[0080] For example, in an application, the constant current source unit 201 can be set to output a current source signal with a maximum current value of 100A and a maximum voltage value of 24V. After the output, the capacitor unit 202 is charged with a constant current of 100A. At this time, the voltage across the capacitor unit 202 increases to 24V. At this time, the capacitor unit 202 can output a pulse current with a peak value of 400A and a duty cycle of 25%, thereby meeting the high current requirements of the relay electrowashing.

[0081] The pulse current module 100 is connected to the power module 200 and the relay to be tested, and is configured to output a constant current signal to the relay to be tested based on a current source signal provided by the power module 200 .

[0082] Specifically, the pulse current module 100 is connected to the power module 200, and obtains the current source signal through the power module 200. After obtaining the current source signal, it is distributed to several constant current substrates 101 for constant current output control. The multiple constant current output units 1011 in the constant current substrate 101 are connected to the current setting signal to achieve control of the output of the constant current substrate 101. Finally, the current signals output by the independently controlled constant current substrates 101 are collected in the output connection component and output to the relay under test.

[0083] In one embodiment, the Figure 1 As shown, the electric washing circuit further includes a control module 300 .

[0084] Among them, the control module 300 is connected to both the power supply module 200 and the pulse current module 100, and is used to control the current source signal output by the power supply module 200, and is also used to output a control signal to the pulse current module 100, and the control signal is used to realize the output control of the pulse current module 100.

[0085] For example, the pulse current module 100 is provided with 10 constant current substrates 101, and each constant current substrate 101 is provided with 12 constant current output units 1011. At this time, each constant current output unit 1011 can output a maximum current of 4A, so the entire pulse current module 100 can output a total of 4*10*12, that is, 480A current signal. When a current signal of 400A needs to be output, it is only necessary to control the constant current output unit 1011, that is, each constant current output unit 1011 assumes a current output of 3.33A. According to the current output value, the corresponding current setting signal is input to the pulse current module 100, thereby controlling the output voltage of the second amplifier in the constant current output unit 1011, and finally limiting the current value of the current signal of the pulse current module 100 to 400A. In another specific example, when the control module 300 controls the pulse current module 100 to output an electrowashing pulse current of 200A, multiple constant current substrates 101 output corresponding constant current sources, a total of 10*12=120 constant current sources, then each constant current source bears a current of 200A / 120=0.67A. Assuming that the resistance used is 0.075 ohms, the input of the second amplifier is set to 0.075Ω*0.67A=0.05025V.

[0086] In one embodiment, the Figure 5 As shown, the control module 300 includes a coil setting circuit 301 , a coil acquisition circuit 302 , a coil control bridge circuit 303 , a contact setting circuit 304 , a contact current acquisition circuit 305 , and a contact voltage acquisition circuit 306 .

[0087] The coil setting circuit 301 is connected to the coil of the relay to be tested and is used to control the operating parameters of the coil of the relay to be tested.

[0088] Specifically, the coil setting circuit 301 can set the control voltage according to the electric washing requirements of the relay.

[0089] The coil acquisition circuit 302 is connected to the coil of the relay to be tested, and is used to obtain the coil voltage and / or coil current of the relay to be tested.

[0090] Specifically, the coil acquisition circuit 302 may include a coil voltage acquisition circuit and a coil current acquisition circuit. The coil voltage acquisition circuit is used to acquire the voltage across the coil of the relay under test, thereby determining whether the voltage across the coil is normal when the relay under test is opened or opened. The coil current acquisition circuit is used to acquire the current flowing through the coil of the relay under test, thereby determining whether the coil current is normal when the relay under test is opened or opened.

[0091] The coil control bridge circuit 303 is connected to the coil of the relay to be tested and is used to output a control signal to the coil of the relay to be tested. The coil control bridge circuit 303 is adapted to the coil structure of the relay to be tested.

[0092] Specifically, the coil control bridge circuit 303 can connect and control the relay according to the application requirements of the relay, and can adapt to different relay specifications, such as: two-wire conventional relay, three-wire conventional relay, two-wire self-holding relay and three-wire self-holding relay, etc., and can also select which end of the relay coil is the positive voltage and which end is the negative voltage.

[0093] In this embodiment, a unit circuit related to coil control is provided in the control module 300, which can realize accurate control and acquisition detection of the relay coil.

[0094] The contact setting circuit 304 is connected to the pulse current module 100 and is used to output the control signal to the pulse current module 100 .

[0095] Specifically, the contact setting circuit 304 can set the total current of the pulse current module 100 to achieve accurate output.

[0096] The contact current acquisition circuit 305 is connected to the pulse current module 100 and is used to obtain the current value of the current signal output by the pulse current module 100 .

[0097] Specifically, the contact current acquisition circuit 305 can be connected to the pulse current module 100 to obtain the current value of the current signal output by the pulse current module 100. Exemplarily, the contact current acquisition circuit 305 can be connected to a shunt external to the pulse current module 100 for current acquisition.

[0098] The contact voltage acquisition circuit 306 is connected to the contact of the relay to be tested, and is used to obtain voltage values ​​at two ends of the contact of the relay to be tested.

[0099] In this embodiment, the unit circuits related to contact control in the control module 300 can achieve precise control and data acquisition detection of the contacts of the relay to be tested.

[0100] In one embodiment, the electrowashing circuit further includes a current acquisition module.

[0101] The current acquisition module is connected to the relay to be tested and is used to obtain the current value flowing through the contacts of the relay to be tested.

[0102] In this embodiment, a current acquisition module is provided in the electric washing circuit, which helps to detect the total current flowing through the contacts of the relay to be tested, thereby achieving overall control of the electric washing circuit.

[0103] In one embodiment, the Figure 2 As shown, the electric washing circuit also includes:

[0104] The heat dissipation module 104 is fixed to the constant current substrate 101 , and the heat dissipation module 104 is used to realize heat exchange between the constant current substrate 101 and a heat exchange medium.

[0105] The heat exchange medium may be air, water, inorganic solution, etc. The heat dissipation module 104 may be an air-cooled heat sink, a water-cooled radiator, etc.

[0106] In this embodiment, by providing the heat dissipation module 104 , the operating temperature of the constant current substrate 101 can be regulated, thereby improving the operating stability of the constant current substrate 101 .

[0107] In one embodiment, the Figure 1 As shown, the electric washing circuit further includes a first switch unit K1, a second switch unit K2, and a third switch unit K3.

[0108] The first switch unit K1 is disposed between the constant current source unit 201 and the capacitor unit 202 , and is used to control the charging state of the capacitor unit 202 .

[0109] The second switch unit K2 is provided between the capacitor unit 202 and the relay to be tested, and is used to control the current output state of the relay to be tested.

[0110] The third switch unit K3 is provided between the capacitor unit 202 and the pulse current module 100 , and is used to control the discharge state of the capacitor unit 202 .

[0111] In one embodiment, the control module 300 further includes a switch control circuit, which is connected to the first switch unit K1, the second switch unit K2, and the third switch unit K3 and is used to control the switching states of the first switch unit K1, the second switch unit K2, and the third switch unit K3.

[0112] For example, in an application scenario, the switching states of the third switch unit K3 and the first switch unit K1 and the second switch unit K2 are mutually exclusive. When the third switch unit K3 is turned on, the first switch unit K1 and the second switch unit K2 are turned off.

[0113] In this embodiment, multiple switching devices are provided in the electric washing circuit. Through the multiple switching units, the working state switching of the entire relay electric washing equipment is accurately controlled, which helps to improve the flexibility of the relay electric washing equipment in use.

[0114] In one embodiment, the Figure 1 As shown, the electric washing circuit also includes a discharge circuit.

[0115] Specifically, the discharge circuit may be connected to the capacitor unit 202 to release the electrical energy stored in the capacitor unit 202 .

[0116] In this embodiment, the release of capacitor energy in the electric washing circuit through the discharge circuit helps to avoid circuit damage caused by abnormal conditions such as short circuits during maintenance, and helps to improve the safety of the electric washing circuit.

[0117] In one embodiment, the Figure 5 As shown, the control module 300 may further include a capacitance acquisition circuit, a temperature control circuit, a screen display circuit, a processor circuit, and a communication control circuit.

[0118] The capacitance acquisition circuit is used to obtain the voltage across the capacitor unit 202 , which can assist in determining whether the capacitor unit 202 can provide sufficient power to other modules.

[0119] Among them, the temperature control circuit is responsible for collecting the internal temperature of the equipment and controlling the fan.

[0120] Among them, the screen display circuit can control the display screen and provide an operation interface for users to display information and interactively control.

[0121] Among them, the processor circuit is used to control the operation of all circuits on the device.

[0122] The communication control circuit is used to provide an external communication control unit, and illustratively, TCP / IP communication may be used.

[0123] Based on the same inventive concept, an embodiment of the present application also provides a relay electric washing device, including an electric washing current as recorded in any one of the above embodiments.

[0124] It can be understood that the above-mentioned relay electric washing equipment can also adopt other forms, and is not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of accurately outputting large currents suitable for the specifications of the relay.

[0125] The above circuit can be applied to relay devices or similar devices in electronic equipment such as AC adapters and in-vehicle equipment.

[0126] In the description of this specification, reference to the terms "some embodiments" or "other embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0127] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An electric washing circuit, characterized in that: The electric washing circuit includes: A pulse current module includes a first input end, a first output end, and at least two constant current substrates, wherein the at least two constant current substrates are located between the first input end and the first output end and are arranged in parallel, and the first output end is used to output an electrowashing pulse current; The power supply module is connected to the first input terminal of the pulse current module.

2. The electric washing circuit according to claim 1, characterized in that Each of the constant current substrates includes a plurality of constant current output units, and the plurality of constant current output units are connected in parallel.

3. The electric washing circuit according to claim 2, characterized in that: The constant current output unit includes a first amplifier, a second amplifier and a switching tube. The first amplifier is connected to the second amplifier and is used to output a control signal to the switching tube. The source end of the switching tube is connected to the first input end, the drain end of the switching tube is connected to the first output end, and the gate end of the switching tube is connected to the output end of the second amplifier.

4. The electric washing circuit according to claim 1, characterized in that The power module includes: Constant current source unit; A capacitor unit is connected in parallel with the constant current source unit. The capacitor unit is charged based on the current output by the constant current source unit and outputs a pulse current for electrowashing the relay to be tested. The instantaneous value of the pulse current is greater than the current value output by the constant current source unit.

5. The electric washing circuit according to claim 1, characterized in that The electric washing circuit also includes: The control module is connected to both the power supply module and the pulse current module, and is used to control the current source signal output by the power supply module, and is also used to output a control signal to the pulse current module, wherein the control signal is used to realize output control of the pulse current module.

6. The electric washing circuit according to claim 5, characterized in that: The control module includes: A coil setting circuit is connected to the coil of the relay to be tested and is used to control the operating parameters of the coil of the relay to be tested; A coil acquisition circuit is connected to the coil of the relay to be tested and is used to obtain the coil voltage and / or coil current of the relay to be tested; a coil control bridge circuit, connected to the coil of the relay to be tested, for outputting a control signal to the coil of the relay to be tested, wherein the coil control bridge circuit is adapted to the coil structure of the relay to be tested; a contact setting circuit, connected to the pulse current module, and configured to output the control signal to the pulse current module; A contact current acquisition circuit, connected to the pulse current module, for acquiring the current value of the current signal output by the pulse current module; The contact voltage acquisition circuit is connected to the contact of the relay to be tested and is used to obtain voltage values ​​at two ends of the contact of the relay to be tested.

7. The electric washing circuit according to claim 1, characterized in that: The electric washing circuit also includes: The current acquisition module is connected to the relay to be tested and is used to obtain the current value flowing through the contacts of the relay to be tested.

8. The electric washing circuit according to claim 1, characterized in that The electric washing circuit also includes: A heat dissipation module, to which the constant current substrate is fixed, and the heat dissipation module is used to realize heat exchange between the constant current substrate and a heat exchange medium.

9. The electric washing circuit according to claim 4, characterized in that: The electric washing circuit also includes: a first switch unit, provided between the constant current source unit and the capacitor unit, for controlling a charging state of the capacitor unit; a second switch unit, provided between the capacitor unit and the relay to be tested, for controlling the current output state of the relay to be tested; The third switch unit is provided between the capacitor unit and the pulse current module, and is used to control the discharge state of the capacitor unit.

10. A relay electric washing device, characterized in that: Comprising an electric washing circuit according to any one of claims 1-9.

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