Positive and negative contactor simultaneous detection device, method and charging equipment

Abstract

The present application provides a positive and negative contactor simultaneous detection device, method and charging equipment, the device comprising: a control unit, a first contactor, a second contactor, a first contact detection unit, and a second contact detection unit; the signal output end of the control unit is connected to the input end of the first contactor and the input end of the second contactor respectively; the first contact detection unit detects the actual state information of the first contactor and outputs the first contact result to the control unit; the second contact detection unit is used to detect the actual state information of the second contactor and output the second contact result to the control unit; the control unit is also used to determine the target detection result according to the control signal, the first contact result and the second contact result. Improve the comprehensiveness and accuracy of the contactor detection results, reduce the occupancy rate of the control chip in the circuit pins, thereby releasing more pins in the circuit, reducing the cost on the chip, facilitating users to quickly handle abnormalities, and reducing repair and maintenance costs.

Description

Technical Field

[0001] The present application relates to the technical field of contactor detection, and in particular to a device and method for simultaneously detecting positive and negative contactors, and a charging device. Background Art

[0002] Charging piles are playing an increasingly important role in both the new energy industry and the automotive industry, and with them comes the need for faster and more convenient charging. In order to meet the charging needs of different models with different power, power allocation is achieved by controlling the opening and closing of the contactor between the DC charging module and the charging interface on the DC charging pile. Among them, the status detection of the contactor is the top priority for power allocation.

[0003] In the prior art, it is necessary to control a contactor through one pin of a control chip and detect the contactor through another pin. Therefore, for each contactor, two pins need to be connected from the control chip to control and detect the contactor. However, due to the limited number of pins of the control chip, when the number of contactors is large, more control chips need to be used, resulting in increased chip costs. Therefore, the existing contactor detection method is not suitable for scenarios with a large number of contactors. In addition, the use of the existing detection method has problems such as incomplete detection results. Summary of the invention

[0004] The purpose of the present application is to provide a positive and negative contactor simultaneous detection device, method and charging equipment to improve the accuracy of contactor detection in view of the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a positive and negative contactor simultaneous detection device, the device comprising: a control unit, a first contactor, a second contactor, a first contact point detection unit, and a second contact point detection unit;

[0007] The signal output end of the control unit is connected to the input end of the first contactor and the input end of the second contactor respectively;

[0008] The first output end of the first contactor is connected to the input end of the first contact detection unit, and the second output end of the first contactor is used to connect a load;

[0009] The first output end of the second contactor is connected to the input end of the second contact detection unit, and the second output end of the second contactor is used to connect a load;

[0010] The output end of the first contact detection unit and the output end of the second contact detection unit are both connected to the result input end of the control unit; the first contact detection unit is used to detect the actual state information of the first contactor and output the first contact result to the control unit; the second contact detection unit is used to detect the actual state information of the second contactor and output the second contact result to the control unit;

[0011] The control unit is used to send a control signal to the first contactor and the second contactor through the signal output end to trigger the on and off of the first contactor and the second contactor; the control unit is also used to determine a target detection result based on the control signal, the first contact result and the second contact result, and the target detection result is used to indicate whether the actual state of the first contactor and the second contactor is consistent with the state indicated by the control signal.

[0012] Optionally, the control unit includes: a main control module and a logic control module;

[0013] The signal output end of the main control module is respectively connected to the input end of the first contactor, the input end of the second contactor and the input end of the logic control module;

[0014] The input end of the logic control module is connected to the output end of the first contact detection unit and the output end of the second contact detection unit respectively;

[0015] The output terminal of the logic control module is connected to the result input terminal of the main control module;

[0016] The main control module is used to output the control signal to the first contactor, the second contactor and the logic control module;

[0017] The logic control module is used to receive the first touch result, the second touch result and the control signal, and determine a first detection result according to the control signal, the first touch result and the second touch result;

[0018] The main control module determines a target detection result according to the first detection result and the control signal.

[0019] Optionally, the logic control module includes: a first XOR gate, a second XOR gate, a third XOR gate, a first AND gate, a second AND gate and an OR gate;

[0020] The first input end of the first XOR gate is used to access the first contact result, the second input end of the first XOR gate is used to access the second contact result, and the output end of the first XOR gate is connected to the second input end of the second AND gate and the second input end of the second XOR gate;

[0021] The first input end of the first AND gate is used to access the first contact result, the second input end of the first AND gate is used to access the second contact result, and the output end of the first AND gate is connected to the second input end of the OR gate;

[0022] The first input end of the second AND gate is used to access the control signal, the output end of the second AND gate is connected to the first input end of the OR gate, and the output end of the OR gate is connected to the second input end of the third XOR gate;

[0023] The first input end of the second XOR gate is used to access the control signal, the output end of the second XOR gate is connected to the first input end of the third XOR gate, and the output end of the third XOR gate is used to output the first detection result.

[0024] Optionally, the control unit further comprises: a coil control module;

[0025] The input end of the coil control module is connected to the signal output end of the main control module;

[0026] The output end of the coil control module is connected to the input end of the first contactor and the input end of the second contactor respectively.

[0027] Optionally, it further includes: a first DC charging module and a second DC charging module;

[0028] The positive output end of the first DC charging module and the positive output end of the second DC charging module are both used to connect to the first contactor;

[0029] The negative output end of the first DC charging module and the negative output end of the second DC charging module are both used to connect to the second contactor.

[0030] In a second aspect, an embodiment of the present application further provides a charging device, comprising the positive and negative contactor simultaneous detection device described in the first aspect.

[0031] In a second aspect, an embodiment of the present application further provides a method for simultaneously detecting a positive and negative contactor, which is applied to a control unit in the device for simultaneously detecting a positive and negative contactor according to the first aspect, and the method comprises:

[0032] Sending a control signal to the first contactor and the second contactor;

[0033] receiving a first touch result of a first touch detection unit and a second touch result of a second touch detection unit;

[0034] A target detection result is determined according to the first contact result, the second contact result and the control signal, wherein the target detection result is used to indicate whether the actual states of the first contactor and the second contactor are consistent with the states indicated by the control signal.

[0035] Optionally, determining the target detection result according to the first touch result, the second touch result and the control signal includes:

[0036] Determine a first detection result according to the first contact result, the second contact result and the control signal, wherein the first detection result is used to indicate a fusion state of the first contactor and the second contactor;

[0037] The target detection result is determined according to the first detection result and the control signal.

[0038] Optionally, determining the first detection result according to the first touch result, the second touch result and the control signal includes:

[0039] The first touch result, the second touch result and the control signal are respectively input into a logic control module, and a first detection result is obtained through a first XOR gate, a second XOR gate, a third XOR gate, a first AND gate, a second AND gate and an OR gate.

[0040] Optionally, determining a target detection result according to the first detection result and the control signal includes:

[0041] The first detection result and the control signal are input into a main control module for comparison and processing to obtain a target detection result.

[0042] The beneficial effects of this application are:

[0043] The present application provides a positive and negative contactor simultaneous detection device, method and charging equipment. By connecting the signal output end of the control unit to the input end of the first contactor and the input end of the second contactor respectively, the control unit can send a control signal to the first contactor and the second contactor at the same time, so that the two contactors on the same circuit can be controlled by the control unit at the same time, so that the two contactors can be closed or disconnected at the same time, and the control unit can obtain the target detection result according to the control signal, the first contact result and the second contact result, and the obtained target detection result includes normal disconnection, adhesion abnormality, refusal to move abnormality and normal closure, while the existing detection results can only include partial results, which are not comprehensive compared to the target detection results in the present application. Therefore, the target detection results in the present application are more comprehensive and more accurate; and, compared with the prior art, it is necessary to control a contactor through one pin of the control chip and detect the contactor through another pin, which can reduce the pin occupancy rate of the control chip in the circuit, thereby releasing more pins in the circuit and reducing the cost on the chip. At the same time, it can also improve the comprehensiveness and accuracy of the contactor detection results, and can quickly locate the abnormal circuit according to the detection results, thereby reducing the personal and property safety caused by the contactor abnormality, facilitating users to quickly handle the abnormality and reducing repair and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 The first positive and negative contactor simultaneous detection device provided in the embodiment of the present application;

[0046] Figure 2 A second positive and negative contactor simultaneous detection device provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of the structure of a logic control module provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of the structure of a coil control module provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of the structure of a contact detection unit provided in an embodiment of the present application;

[0050] Figure 6A method for simultaneously detecting positive and negative contactors provided in an embodiment of the present application;

[0051] Figure 7 Another method for simultaneously detecting positive and negative contactors is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0053] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0054] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0055] Figure 1 The first positive and negative contactor simultaneous detection device provided in the embodiment of the present application is as follows: Figure 1 As shown, the positive and negative contactor simultaneous detection device may include: a control unit 1, a first contactor 2, a second contactor 3, a first contact point detection unit 4 and a second contact point detection unit 5.

[0056] like Figure 1As shown, the signal output end of the control unit 1 is respectively connected to the input end of the first contactor 2 and the input end of the second contactor 3, and the first output end of the first contactor 2 is connected to the input end of the first contact detection unit 4, wherein the first output end of the first contactor 2 can be the auxiliary contact end of the first contactor 2, and the second output end of the first contactor 2 can be connected to a load, wherein the second output end of the first contactor 2 can be the main contact end of the first contactor 2, and the load can refer to a charging gun. The first contactor 2 and the second contactor 3 can be contactors on the same circuit, the first contactor 2 can be a contactor CM+ on the positive circuit, and the second contactor 3 can be a contactor CM- on the negative circuit. Only when the first contactor 2 and the second contactor 3 are both working normally can the normal state of the circuit be guaranteed, and only then can the power be allocated, thereby ensuring the safety of the user of the charging device.

[0057] Continue as Figure 1 As shown, the first output end of the second contactor 3 can be connected to the input end of the second contact detection unit 5, and the second output end of the second contactor 3 can be connected to the load. Among them, the first output end of the second contactor 3 can be the auxiliary contact end of the second contactor 3, and the second output end of the second contactor 3 can be the main contact end of the second contactor 3. The output end of the first contact detection unit 4 and the output end of the second contact detection unit 5 can both be connected to the result input end of the control unit 1. The first contact detection unit 4 can be used to detect the actual state information of the first contactor 2, which refers to the actual on-off information of the first contactor 2, and the actual state information includes the on or off of the first contactor 2, and output the first contact result to the control unit 1, and the first contact result also indicates the on-off result of the first contactor 2. The first contact result can be represented by DI+, for example. Specifically, if the actual state information of the first contactor 2 is the on state, the first contact result output by the first contact detection unit 4 to the control unit 1 is 1; if the actual state information of the first contactor 2 is the off state, the first contact result output by the first contact detection unit 4 to the control unit 1 is 0.

[0058] Optionally, the second contact detection unit 5 can be used to detect the actual state information of the second contactor 3 and output the second contact result to the control unit 1. The actual state information of the second contactor 3 can also include whether the second contactor 3 is on or off, and the second contact result can indicate the on-off result of the second contactor 3. The second contact result can be represented by DI-, for example. Specifically, if the actual state information of the second contactor 3 is the on state, the second contact result output by the second contact detection unit 5 to the control unit 1 is 1; if the actual state information of the second contactor 3 is the off state, the first contact result output by the second contact detection unit 5 to the control unit 1 is 0.

[0059] Optionally, the control unit 1 can be used to send a control signal to the first contactor 2 and the second contactor 3 through the signal output terminal to trigger the on and off of the first contactor 2 and the second contactor 3. The control signal can be represented by DO, for example, if DO=high level or 1, it means that the first contactor 2 and the second contactor 3 are controlled to be closed, and when DO=low level or 0, it means that the first contactor 2 and the second contactor 3 are controlled to be disconnected.

[0060] Optionally, the control unit 1 can also be used to determine the target detection result according to the control signal, the first contact result and the second contact result, wherein the target detection result can be used to indicate whether the actual state of the first contactor 2 and the second contactor 3 is consistent with the state indicated by the control signal. When the actual state of the first contactor 2 and the second contactor 3 is consistent with the state indicated by the control signal and is closed, it means that the target detection result is normally closed, and power can be allocated; when the actual state of the first contactor 2 and the second contactor 3 is consistent with the state indicated by the control signal and is off, it means that the target detection result is normally off, and power cannot be allocated at this time; when the actual state of the first contactor 2 and the second contactor 3 is inconsistent with the state indicated by the control signal, there is an abnormality, wherein the abnormality can specifically include adhesion abnormality and refusal to move abnormality, and abnormal processing is required at this time. Therefore, the target detection result includes 4 comparison results, which can specifically include: normal disconnection, adhesion abnormality, refusal to move abnormality and normal closure.

[0061] Optionally, based on the four comparison results, the first contactor 2 and the second contactor 3 may include eight states, specifically, the eight states may include: both positive and negative are normally disconnected, negative contactor is adhered, positive contactor is adhered, contactor is fully adhered, contactor is fully refused to move, negative contactor refuses to move, positive contactor refuses to move, and both positive and negative are normally closed, wherein only one contactor refuses to move or is adhered, resulting in a circuit abnormality, which requires manual handling of the abnormality. Therefore, when judging, one of the positive and negative is adhered and both the positive and negative are adhered, and it is judged as contactor adhesion, and one of the positive and negative refuses to move and both the positive and negative refuse to move are judged as contactor refusal to move.

[0062] In this embodiment, by connecting the signal output end of the control unit to the input end of the first contactor and the input end of the second contactor respectively, the control unit can send a control signal to the first contactor and the second contactor at the same time, so that the two contactors on the same circuit can be controlled by the control unit at the same time, so that the two contactors can be closed or disconnected at the same time, and the control unit can obtain the target detection result according to the control signal, the first contact result and the second contact result, and the obtained target detection result includes normal disconnection, adhesion abnormality, refusal abnormality and normal closure. Therefore, the target detection result in the present application is more comprehensive and more accurate; and, compared with the prior art, it is necessary to control a contactor through one pin of the control chip and detect the contactor through another pin, which can reduce the occupancy rate of the pins of the control chip in the circuit, thereby releasing more pins of the control chip and reducing the cost on the chip. At the same time, it can also improve the comprehensiveness and accuracy of the contactor detection results, and can quickly locate the abnormal circuit according to the detection results, thereby reducing the personal and property safety caused by the contactor abnormality, facilitating users to quickly handle abnormalities, and reducing repair and maintenance costs.

[0063] Figure 2 The second positive and negative contactor simultaneous detection device provided in the embodiment of the present application is as follows: Figure 2 As shown, the control unit 1 may include: a main control module 11 and a logic control module 12 .

[0064] like Figure 2 As shown, the signal output end of the main control module 11 is respectively connected to the input end of the first contactor 2, the input end of the second contactor 3 and the input end of the logic control module 12. The input end of the logic control module 12 is respectively connected to the output end of the first contact detection unit 4 and the output end of the second contact detection unit 5, and the output end of the logic control module 12 can be connected to the result input end of the main control module 11.

[0065] Optionally, the main control module 11 may output control signals to the first contactor 2 , the second contactor 3 and the logic control module 12 .

[0066] Optionally, the logic control module 12 may receive the first touch result, the second touch result, and the control signal, and determine the first detection result according to the control signal, the first touch result, and the second touch result.

[0067] Optionally, the main control module 11 may determine the target detection result according to the first detection result and the control signal.

[0068] In this embodiment, the first contact result and the second contact result are first sent to the logic control module to obtain the first detection result, and then the first detection result is sent to the main control module, so that the main control module only needs to determine the target detection result according to the first detection result and the control signal. For the main control module, two contactors can be controlled simultaneously through one pin, and the purpose of detecting the two contactors can be achieved through only one pin. Figure 2 It can also be seen that the main control module only needs one output pin and one input pin to realize the control and detection of two contactors at the same time.

[0069] Figure 3 A schematic diagram of the structure of a logic control module provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the logic control module 12 may include: a first XOR gate, a second XOR gate, a third XOR gate, a first AND gate, a second AND gate and an OR gate.

[0070] Optionally, the first input terminal of the first XOR gate U4 is used to access the first contact result DI+, the second input terminal of the first XOR gate U4 is used to access the second contact result DI-, and the output terminal of the first XOR gate U4 is connected to the second input terminal of the second AND gate U3 and the second input terminal of the second XOR gate U1.

[0071] Optionally, the first input terminal of the first AND gate U6 is used to access the first contact result, the second input terminal of the first AND gate U6 is used to access the second contact result, and the output terminal of the first AND gate U6 is connected to the second input terminal of the OR gate U5.

[0072] Optionally, the first input terminal of the second AND gate U3 is used to access the control signal, the output terminal of the second AND gate U3 is connected to the first input terminal of the OR gate U5, and the output terminal of the OR gate U5 is connected to the second input terminal of the third XOR gate U2.

[0073] Optionally, the first input end of the second XOR gate U1 is used to access the control signal, the output end of the second XOR gate U1 is connected to the first input end of the third XOR gate U2, and the output end of the third XOR gate U2 is used to output the first detection result M, wherein the output end of the second XOR gate U1 outputs the operation result value S, and the output end of the XOR gate U5 outputs the carry value C, then the operation result value S and the carry value C pass through the third XOR gate U2 to obtain the first detection result M.

[0074] In this embodiment, the fusion state of the feedback of the first contactor and the second contactor can be obtained through the first XOR gate, the second XOR gate, the third XOR gate, the first AND gate, the second AND gate and the OR gate in the logic control module.

[0075] Continue to refer to Figure 2 ,like Figure 2As shown, the control unit 1 may further include: a coil control module 13 .

[0076] like Figure 2 As shown, the input end of the coil control module 13 can be connected to the signal output end of the main control module 11, and the output end of the coil control module 13 can be respectively connected to the input end of the first contactor 2 and the input end of the second contactor 3. Then, the main control module 11 can control the first contactor 2 and the second contactor 3 to be turned on or off at the same time through the coil control module 13.

[0077] Figure 4 A schematic diagram of the structure of a coil control module provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, when the control signal DO sent by the main control module 11 is at a high level, the control signal passes through the current limiting resistor R1 and enters the transistor Q1. After Q1 is turned on, the L4 pin of the relay RLY1 is grounded. After the coil of the relay RLY1 is energized, the output end of the relay RLY1 is closed, thereby controlling the first contactor 2 and the second contactor 3 to be turned on at the same time.

[0078] Optionally, when the control signal DO sent by the main control module 11 is at a low level, Q1 is not conducting, the coil of the relay RLY1 is de-energized, and the output end of the relay RLY1 is disconnected, thereby simultaneously controlling the first contactor 2 and the second contactor 3 to be disconnected.

[0079] Figure 5 A schematic diagram of the structure of a contact detection unit provided in an embodiment of the present application is shown in FIG. Figure 5 Taking the structure of the first contact detection unit as an example, the structure and detection principle of the second contact detection unit are similar to those of the first contact detection unit, and are not described in detail here.

[0080] like Figure 5 As shown, the first contact detection unit may include a resistor R2, a resistor R3, an optocoupler diode U7, and a resistor R4, wherein the resistor R2 is connected to the auxiliary contact of the first contactor CM+, and when the first contactor CM+ is turned on or off, the auxiliary contact will provide a feedback signal, and after detection and processing by the first contact detection unit, the first contact detection result DI+ is output. Specifically, when the main coil of the first contactor CM+ is energized, the auxiliary contact of the first contactor CM+ is also simultaneously attracted, the optocoupler diode U7 is turned on through the voltage division of R2 and R3, and DI+ is pulled up through the pull-up resistor R4, then the first contact detection result DI+ is 1.

[0081] Optionally, when the main coil of the first contactor CM+ is powered off, the auxiliary contact of the first contactor CM+ is also disconnected, the optocoupler diode U7 is not conducting, DI+ is pulled low, and the first contact detection result DI+ is 0.

[0082] Continue to refer to Figure 1 ,like Figure 1 As shown, the positive and negative contactor simultaneous detection device may also include: a first DC charging module 6 and a second DC charging module 7. The positive output end of the first DC charging module 6 and the positive output end of the second DC charging module 7 are both used to connect to the first contactor 2; the negative output end of the first DC charging module 6 and the negative output end of the second DC charging module 7 are both used to connect to the second contactor 3.

[0083] An embodiment of the present application further provides a charging device, which includes the positive and negative contactor simultaneous detection device in the aforementioned specific embodiment. The charging device may be, for example, a charging pile.

[0084] Figure 6 A method for simultaneously detecting a positive and negative contactor provided in an embodiment of the present application is applied to the control unit in the aforementioned device for simultaneously detecting a positive and negative contactor. The method may include:

[0085] S101 . Send a control signal to a first contactor and a second contactor.

[0086] The control signal may include: controlling the first contactor and the second contactor to be turned on or off.

[0087] Optionally, after the control unit sends a control signal to the first contactor and the second contactor, the first contactor and the second contactor are turned on or off based on the control signal. When the first contactor and the second contactor receive the control signal, actual status information of the first contactor and the second contactor may be the same as or different from the control status of the control signal. Therefore, the actual status information of the first contactor is detected by the first contact detection unit to obtain a first contact result, and the actual status information of the second contactor is detected by the second contact detection unit to obtain a second contact result.

[0088] Exemplarily, when the control signal DO is at a high level, that is, the first contactor and the second contactor are controlled to be turned on at the same time, the first contact result obtained by the first contact detection unit can be 0 or 1; and the second contact result obtained by the second contact detection unit can be 0 or 1. When the contact result is 1, it indicates that the contactor is turned on, and when the contact result is 0, it indicates that the contactor is turned off.

[0089] S102, receiving a first touch result of a first touch detection unit and a second touch result of a second touch detection unit.

[0090] Optionally, the first contact point detection unit sends the first contact point result DI+ obtained and the second contact point detection unit sends the second contact point result DI- obtained to the control unit.

[0091] S103: Determine a target detection result according to the first touch result, the second touch result and the control signal.

[0092] Optionally, the control unit may determine a target detection result using a preset method according to the first contact result, the second contact result and the control signal, and the target detection result may be used to indicate whether the actual states of the first contactor and the second contactor are consistent with the states indicated by the control signal.

[0093] Figure 7 Another method for simultaneously detecting positive and negative contactors provided in an embodiment of the present application is as follows: Figure 7 As shown, determining the target detection result according to the first touch result, the second touch result and the control signal in the above S103 may include:

[0094] S201: Determine a first detection result according to a first touch point result, a second touch point result, and a control signal.

[0095] Among them, the first detection result can be used to indicate the fusion state of the first contactor and the second contactor, and the fusion state can be represented by M. When M=0, it means that the state of the first contactor and the state of the second contactor are consistent with the control signal, for example, when DO=0, DI+=0 and DI-=0; or when DO=1, DI+=1 and DI-=1. When M=1, it means that at least one of the state of the first contactor and the state of the second contactor is inconsistent with the control signal, for example, when DO=0, DI+=0, DI-=1.

[0096] S202: Determine a target detection result according to the first detection result and the control signal.

[0097] Specifically, the first detection result and the control signal may be compared and processed to obtain a target detection result.

[0098] Optionally, determining the first detection result according to the first touch result, the second touch result and the control signal in S201 may include:

[0099] Optionally, the first contact result, the second contact result and the control signal are respectively input into the logic control module, and the first detection result is obtained through the first XOR gate, the second XOR gate, the third XOR gate, the first AND gate, the second AND gate and the OR gate.

[0100] Specifically, a carry value C is obtained through the first XOR gate, the first AND gate, the second AND gate and the OR gate, the control signal and the output result of the first XOR gate are input into the second XOR gate to obtain the operation value S, and then the carry value C and the operation value S are input into the third XOR gate for calculation to obtain the first detection result M.

[0101] Optionally, determining the target detection result according to the first detection result and the control signal in S202 may include:

[0102] Optionally, the first detection result M and the control signal DO are input into the main control module for comparison and processing to obtain a target detection result. The target detection result obtained is as shown in Table 1 below. The actual situation column in Table 1 shows the states of the first contactor and the second contactor at different detection results, and there are 8 states in total.

[0103] Optionally, when the circuit includes multiple loops, the abnormal loop can be quickly located based on the detection results of the loops and the identification of the loops.

[0104] Table 1

[0105] DO DI+ DI- S C M Indicates status Actual situation Target detection results 0 0 0 0 0 0 D0=0,M=0 Both positive and negative are disconnected normally Normal disconnection 0 0 1 1 0 1 D0=0,M=1 Negative contactor adhesion Abnormal adhesion 0 1 0 1 0 1 D0=0,M=1 Positive contactor adhesion Abnormal adhesion 0 1 1 0 1 1 D0=0,M=1 Contactor full adhesion Abnormal adhesion 1 0 0 1 0 1 D0=1,M=1 Contactor all rejected Abnormal refusal to move 1 0 1 0 1 1 D0=1,M=1 Negative contactor refuses to operate Abnormal refusal to move 1 1 0 0 1 1 D0=1,M=1 Positive contactor refuses to operate Abnormal refusal to move 1 1 1 1 1 0 D0=1,M=0 Both positive and negative are normally closed Normally closed

[0106] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules 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 communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0107] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccess Memory), disk or optical disk and other media that can store program code.

[0108] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A positive and negative contactor simultaneous detection device, characterized in that: The device comprises: a control unit, a first contactor, a second contactor, a first contact point detection unit, and a second contact point detection unit; The control unit comprises: a main control module and a logic control module; the first output end of the first contactor is connected to the input end of the first contact detection unit, and the second output end of the first contactor is used to connect a load; The first output end of the second contactor is connected to the input end of the second contact detection unit, and the second output end of the second contactor is used to connect a load; The signal output end of the main control module is respectively connected to the input end of the first contactor, the input end of the second contactor and the input end of the logic control module; The input end of the logic control module is connected to the output end of the first contact detection unit and the output end of the second contact detection unit respectively, the first contact detection unit is used to detect the actual state information of the first contactor and output the first contact result to the logic control module; the second contact detection unit is used to detect the actual state information of the second contactor and output the second contact result to the logic control module; The output terminal of the logic control module is connected to the result input terminal of the main control module; The main control module is used to output the control signal to the first contactor, the second contactor and the logic control module, and the control signal is used to trigger the on and off of the first contactor and the second contactor; The logic control module is used to receive the first contact result, the second contact result and the control signal, and determine a first detection result according to the control signal, the first contact result and the second contact result, wherein the first detection result is used to indicate a fusion state of the first contactor and the second contactor; The main control module determines a target detection result based on the first detection result and the control signal, and the target detection result is used to indicate whether the actual state of the first contactor and the second contactor is consistent with the state indicated by the control signal, and the target detection result includes normal disconnection, adhesion abnormality, refusal to move abnormality and normal closure.

2. The positive and negative contactor simultaneous detection device according to claim 1, characterized in that: The logic control module includes: a first XOR gate, a second XOR gate, a third XOR gate, a first AND gate, a second AND gate and an OR gate; The first input end of the first XOR gate is used to access the first contact result, the second input end of the first XOR gate is used to access the second contact result, and the output end of the first XOR gate is connected to the second input end of the second AND gate and the second input end of the second XOR gate; The first input end of the first AND gate is used to access the first contact result, the second input end of the first AND gate is used to access the second contact result, and the output end of the first AND gate is connected to the second input end of the OR gate; The first input end of the second AND gate is used to access the control signal, the output end of the second AND gate is connected to the first input end of the OR gate, and the output end of the OR gate is connected to the second input end of the third XOR gate; The first input end of the second XOR gate is used to access the control signal, the output end of the second XOR gate is connected to the first input end of the third XOR gate, and the output end of the third XOR gate is used to output the first detection result.

3. The positive and negative contactor simultaneous detection device according to claim 1, characterized in that: The control unit further comprises: a coil control module; The input end of the coil control module is connected to the signal output end of the main control module; The output end of the coil control module is connected to the input end of the first contactor and the input end of the second contactor respectively.

4. The positive and negative contactor simultaneous detection device according to claim 1, characterized in that: It also includes: a first DC charging module and a second DC charging module; The positive output end of the first DC charging module and the positive output end of the second DC charging module are both used to connect to the first contactor; The negative output end of the first DC charging module and the negative output end of the second DC charging module are both used to connect to the second contactor.

5. A charging device, characterized in that: It comprises the positive and negative contactor simultaneous detection device as described in any one of claims 1-4.

6. A method for simultaneously detecting positive and negative contactors, characterized in that: A control unit applied to the positive and negative contactor simultaneous detection device according to any one of claims 1 to 4, the method comprising: Sending a control signal to the first contactor and the second contactor; Receiving a first touch result of a first touch detection unit and a second touch result of a second touch detection unit; A target detection result is determined according to the first contact result, the second contact result and the control signal, wherein the target detection result is used to indicate whether the actual states of the first contactor and the second contactor are consistent with the states indicated by the control signal.

7. The method for simultaneous detection of positive and negative contactors according to claim 6, characterized in that: The determining the target detection result according to the first touch result, the second touch result and the control signal includes: Determine a first detection result according to the first contact result, the second contact result and the control signal, wherein the first detection result is used to indicate a fusion state of the first contactor and the second contactor; The target detection result is determined according to the first detection result and the control signal.

8. The method for simultaneous detection of positive and negative contactors according to claim 7, characterized in that: The determining a first detection result according to the first touch result, the second touch result and the control signal includes: The first touch result, the second touch result and the control signal are respectively input into a logic control module, and a first detection result is obtained through a first XOR gate, a second XOR gate, a third XOR gate, a first AND gate, a second AND gate and an OR gate.

9. The method for simultaneous detection of positive and negative contactors according to claim 7, characterized in that: The determining the target detection result according to the first detection result and the control signal includes: The first detection result and the control signal are input into a main control module for comparison and processing to obtain a target detection result.

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