CN218975348U - Intelligent contactor - Google Patents
Intelligent contactor Download PDFInfo
- Publication number
- CN218975348U CN218975348U CN202223482903.7U CN202223482903U CN218975348U CN 218975348 U CN218975348 U CN 218975348U CN 202223482903 U CN202223482903 U CN 202223482903U CN 218975348 U CN218975348 U CN 218975348U
- Authority
- CN
- China
- Prior art keywords
- contactor
- resistor
- circuit
- microcontroller
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The application provides an intelligent contactor which comprises a microcontroller, a drive control circuit, an electromagnetic mechanical switch, a contactor state reading circuit and a contactor state output circuit, wherein the microcontroller is connected to a first input end of the drive control circuit, a second input end of the drive control circuit is connected to a vehicle-mounted storage battery, and an output end of the drive control circuit is connected to the electromagnetic mechanical switch; the contactor state reading circuit is arranged in a preset range of the electromagnetic mechanical switch to acquire the contact state of the electromagnetic mechanical switch, and the output end of the contactor state reading circuit is connected to the microcontroller; one end of the contactor status output circuit is connected to the microcontroller, and the other end of the contactor status output circuit is connected to the external status reading circuit. The intelligent module judges the state of the contact and outputs signals, so that the design of the external controller is simplified.
Description
Technical Field
The application relates to the technical field of vehicle contactors, in particular to an intelligent contactor.
Background
The electric automobile rapidly develops, the power battery pack is used as the most important part on the electric automobile, the power battery pack is also rapidly developed, the power output control of the power battery pack is particularly important, the output control of the power source is mainly realized through a contactor connected in series on a high-voltage bus of the battery pack, the connection of the battery pack and other parts on the automobile is realized through the closing of the contactor, the electric power is provided for the parts, the disconnection of the battery pack and the other parts on the automobile is realized through the disconnection of the contactor, the power source of the automobile is cut off, therefore, the contactor is an important device for the high-voltage control of the automobile, and the disconnection and the closing state of the contactor are directly related to the operation of the electric automobile, so that the state of a contact of the contactor needs to be detected in real time, and the real-time and reliable output of the power source of the electric automobile is ensured.
The existing contactor is mainly simple electromagnetic, the main working principle is that the switch is opened and closed by controlling electromagnetic force, the contactor does not have contact judgment capability, the contact state of the contactor needs to be detected by an external controller, the voltage on two sides of the contact of the contactor is mainly detected by a voltage comparison method to judge the closing state of the contactor, and the state of the contactor is mainly detected by a BMS in battery pack application, so that the circuit design is complex.
Disclosure of Invention
In view of this, the object of the present application is to provide at least an intelligent contactor, which can simplify the design of an external controller by judging the state of the contact by the intelligent module itself and outputting a signal.
The application mainly comprises the following aspects:
in a first aspect, an embodiment of the present application provides an intelligent contactor, where the intelligent contactor includes a microcontroller, a drive control circuit, an electromagnetic mechanical switch, a contactor status reading circuit, and a contactor status output circuit, where the microcontroller is connected to a first input of the drive control circuit, a second input of the drive control circuit is connected to a vehicle-mounted battery, and an output of the drive control circuit is connected to the electromagnetic mechanical switch; the contactor state reading circuit is arranged in a preset range of the electromagnetic mechanical switch to acquire the contact state of the electromagnetic mechanical switch, and the output end of the contactor state reading circuit is connected to the microcontroller; one end of the contactor status output circuit is connected to the microcontroller, and the other end of the contactor status output circuit is connected to an external controller.
In one possible embodiment, the drive control circuit comprises a first resistor, a first switching device, a second resistor, a third resistor and a second switching device, wherein one end of the first resistor is connected to the microcontroller as a first input end of the drive control circuit, and the other end of the first resistor is connected to a control end of the first switching device; the first connecting end of the first switch device is connected to the ground, the second connecting end of the first switch device is connected to one end of the second resistor, and the other end of the second resistor is connected to the control end of the second switch device; the first connecting end of the second switching device is used as a second input end of the driving control circuit and connected to the vehicle-mounted storage battery, and the second connecting end of the second switching device is used as an output end of the driving control circuit and connected to the electromagnetic mechanical switch; one end of the third resistor is connected to the first connection end of the second switching device, and the other end of the third resistor is connected to the other end of the second resistor.
In one possible implementation, the intelligent contactor further comprises a contactor wake-up circuit, a first input terminal of the contactor wake-up circuit is connected to the vehicle-mounted storage battery, a second input terminal of the contactor wake-up circuit is connected to the external controller, and output terminals of the contactor wake-up circuit are respectively connected to the microcontroller, the electromagnetic mechanical switch and the contactor state output circuit.
In one possible implementation manner, the contactor wake-up circuit comprises a power chip, a first capacitor and a fourth resistor, wherein a first input end of the power chip is used as a first input end of the contactor wake-up circuit to be connected to the vehicle-mounted storage battery, a second input end of the power chip is used as a second input end of the contactor wake-up circuit to be connected to one end of the fourth resistor, and a power output end of the power chip is used as an output end of the contactor wake-up circuit to be respectively connected to the microcontroller, the electromagnetic mechanical switch and the contactor state output circuit; one end of the first capacitor is grounded, the other end of the first capacitor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to an external controller.
In one possible implementation, the intelligent contactor further comprises a coil current acquisition circuit, the electromagnetic mechanical switch comprises an electromagnetic coil and a mechanical contact switch, wherein one end of the electromagnetic coil is connected to a second connection end of the second switching device, the other end of the electromagnetic coil is connected to a first input end of the coil current acquisition circuit, the second input end of the coil current acquisition circuit is connected to a power output end of the power chip, and an output end of the coil current acquisition circuit is connected to the microcontroller; the first contact of the mechanical contact switch is connected to the positive electrode of the vehicle-mounted storage battery, and the second contact of the mechanical contact switch is connected to the positive electrode of the external electric load.
In one possible embodiment, the contactor status reading circuit includes an image sensor and an image processing chip, wherein the image sensor is disposed within a preset range of the mechanical contact switch to acquire image data of the mechanical contact switch; the output end of the image sensor is connected to one end of the image processing chip, and the other end of the image processing chip is connected to the microcontroller.
In one possible embodiment, the contactor status output circuit comprises a fifth resistor, a third switching device, a sixth resistor, a seventh resistor, and a fourth switching device, wherein one end of the fifth resistor is connected to the microcontroller, and the other end of the fifth resistor is connected to the control end of the third switching device; the first connecting end of the third switching device is connected to the ground, the second connecting end of the third switching device is connected to one end of a sixth resistor, and the other end of the sixth resistor is connected to the control end of the fourth switching device; the first connecting end of the fourth switching device is connected to the power output end of the power chip, and the second connecting end of the fourth switching device is connected to the external controller; one end of the seventh resistor is connected to the first connection terminal of the fourth switching device, and the other end of the seventh resistor is connected to the other end of the sixth resistor.
In one possible implementation manner, the coil current acquisition circuit comprises an eighth resistor, an operational amplifier, a ninth resistor and a second capacitor, wherein one end of the eighth resistor is connected to the other end of the electromagnetic coil, and the other end of the eighth resistor is grounded; the positive input end of the operational amplifier is used as a first input end of the coil current acquisition circuit and is connected to the other end of the electromagnetic coil, the negative input end of the operational amplifier is grounded, the power supply end of the operational amplifier is used as a second input end of the coil current acquisition circuit and is connected to the power supply output end of the power supply chip, and the grounding end of the operational amplifier is grounded; one end of the ninth resistor is connected to the output end of the operational amplifier, and the other end of the ninth resistor is connected to the microcontroller; one end of the second capacitor is connected to the other end of the ninth resistor, and the other end of the second capacitor is grounded.
In one possible implementation, the intelligent contactor further comprises a contactor enable circuit and a contactor current signal output circuit, wherein an input of the contactor enable circuit is connected to the external controller and an output of the contactor enable circuit is connected to the microcontroller; the output end of the contactor current signal output circuit is connected to an external controller, and the input end of the contactor current signal output circuit is connected to the microcontroller.
In one possible embodiment, the contactor enable circuit includes a tenth resistor and an eleventh resistor, and the contactor current signal output circuit includes a fifth switching device, wherein one end of the tenth resistor is connected to the microcontroller, the other end of the tenth resistor is grounded, one end of the eleventh resistor is connected to one end of the tenth resistor, and the other end of the eleventh resistor is connected to the external controller; the control end of the fifth switch device is connected to the microcontroller, the first connection end of the fifth switch device is connected to the external controller, and the second connection end of the fifth switch device is grounded.
The intelligent contactor comprises a microcontroller, a drive control circuit, an electromagnetic mechanical switch, a contactor state reading circuit and a contactor state output circuit, wherein the microcontroller is connected to a first input end of the drive control circuit, a second input end of the drive control circuit is connected to a vehicle-mounted storage battery, and an output end of the drive control circuit is connected to the electromagnetic mechanical switch; the contactor state reading circuit is arranged in a preset range of the electromagnetic mechanical switch to acquire the contact state of the electromagnetic mechanical switch, and the output end of the contactor state reading circuit is connected to the microcontroller; one end of the contactor status output circuit is connected to the microcontroller, and the other end of the contactor status output circuit is connected to the external status reading circuit. The intelligent module judges the state of the contact and outputs signals, so that the design of the external controller is simplified.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of an intelligent contactor according to an embodiment of the present application;
fig. 2 shows a second schematic structural diagram of an intelligent contactor according to an embodiment of the present application;
fig. 3 shows a third schematic structural diagram of an intelligent contactor according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be appreciated that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.
In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
The existing electromagnetic contactor mainly comprises electromagnetic mechanisms, contact systems, arc extinguishing devices, spring mechanisms, supports, bases and other elements, and mainly adopts the working principle that the contactor is electrified, an internal coil is closed, the contact is driven to be closed under the action of electromagnetic force, the coil of the contactor is powered off, the electromagnetic force disappears, the contact is disconnected, high-voltage side heavy current is controlled by low-voltage side small current, the whole contactor mainly comprises a mechanical structure, the self-diagnosis function is not achieved, and the state of the contact can be detected only by comparing and judging the voltages on two sides of the contact acquired by an external circuit.
That is, the conventional electromagnetic contactor has the following drawbacks:
1. the contact state of the contactor depends on external judgment;
2. the external controller mainly judges the contact point through a voltage comparison method;
3. the external controller is used for on-off control, and the self-locking function is not provided.
Based on this, the embodiment of the application provides an intelligent contactor, judges the state of contact and output signal through intelligent module self, has simplified external controller design, specifically as follows:
referring to fig. 1, fig. 1 shows a schematic structural diagram of an intelligent contactor according to an embodiment of the present application. As shown in fig. 1, the intelligent contactor provided in the embodiment of the present application includes a microcontroller 10, a drive control circuit 20, an electromagnetic mechanical switch 30, a contactor status reading circuit 40, and a contactor status output circuit 50.
The microcontroller 10 is connected to a first input of a drive control circuit 20, a second input of the drive control circuit 20 is connected to a vehicle battery, and an output of the drive control circuit 20 is connected to an electromagnetic mechanical switch 30.
The contactor status reading circuit 40 is arranged within a preset range of the electromagnetic mechanical switch 30 to obtain the contact status of the electromagnetic mechanical switch, and an output terminal of the contactor status reading circuit 40 is connected to the microcontroller 10.
One end of the contactor status output circuit 50 is connected to the microcontroller 10, and the other end of the contactor status output circuit 50 is connected to an external controller.
Referring to fig. 2, fig. 2 shows a second schematic structural diagram of an intelligent contactor according to an embodiment of the present application. As shown in fig. 2, the smart contactor further includes a contactor wake-up circuit 60, a coil current acquisition circuit 70, a contactor enable circuit 80, and a contactor current signal output circuit 90.
Wherein a first input terminal of the contactor wake-up circuit 60 is connected to the vehicle-mounted battery, a second input terminal of the contactor wake-up circuit 60 is connected to the external controller, and output terminals of the contactor wake-up circuit 60 are connected to the microcontroller 10, the electromagnetic mechanical switch 30, and the contactor status output circuit 50, respectively.
An input of the coil current acquisition circuit 70 is connected to an electromagnetic mechanical switch and an output of the coil current acquisition circuit 70 is connected to the microcontroller 10.
Wherein the input of the contactor enable circuit 80 is connected to an external controller and the output of the contactor enable circuit 80 is connected to the microcontroller 10;
the output of the contactor current signal output circuit 90 is connected to an external controller and the input of the contactor current signal output circuit 90 is connected to the microcontroller 10.
Referring to fig. 3, fig. 3 shows a third schematic structural diagram of an intelligent contactor according to an embodiment of the present application. As shown in fig. 3, the drive control circuit 20 includes a first resistor R1, a first switching device D1, a second resistor R2, a third resistor R3, and a second switching device D2.
One end of the first resistor R1 is connected to the microcontroller 10 as a first input end of the driving control circuit 20, and the other end of the first resistor R1 is connected to a control end of the first switching device D1, where the first switching device D1 may be an NPN triode.
The first connection terminal of the first switching device D1 is connected to the ground GND, the second connection terminal of the first switching device D1 is connected to one terminal of the second resistor R2, and the other terminal of the second resistor R2 is connected to the control terminal of the second switching device D2.
The first connection terminal of the second switching device D2 is connected to the vehicle-mounted battery as a second input terminal of the drive control circuit, and the second connection terminal of the second switching device D2 is connected to the electromagnetic mechanical switch 30 as an output terminal of the drive control circuit, wherein the second switching device D2 may be a PMOS switch.
One end of the third resistor R3 is connected to the first connection end of the second switching device R2, and the other end of the third resistor R3 is connected to the other end of the second resistor R2.
In another embodiment, the contactor wake-up circuit 60 includes a power chip 601, a first capacitor C1 and a fourth resistor R4,
the first input end of the power chip 601 is used as the first input end of the contactor wake-up circuit 60 to be connected to the vehicle-mounted storage battery, the second input end of the power chip 601 is used as the second input end of the contactor wake-up circuit 60 to be connected to one end of the fourth resistor R4, and the power output end VCC of the power chip 601 is used as the output end of the contactor wake-up circuit 60 to be used for outputting power and is respectively connected to the microcontroller 10, the electromagnetic mechanical switch 30 and the contactor state output circuit 50 to supply power for the microcontroller 10, the electromagnetic mechanical switch 30 and the contactor state output circuit 50.
One end of the first capacitor C1 is grounded, the other end of the first capacitor C2 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to an external controller, and the external controller generates an output wake-up signal for waking up the power chip 601.
The electromagnetic mechanical switch 30 includes an electromagnetic coil 301 and a mechanical contact switch 302, wherein one end of the electromagnetic coil 301 is connected to the second connection terminal of the second switching device D2, and the other end of the electromagnetic coil 301 is connected to the first input terminal of the coil current collecting circuit 70.
A second input of the coil current acquisition circuit 70 is connected to a power supply output VCC of the power supply chip 601, and an output of the coil current acquisition circuit 70 is connected to the microcontroller 10.
The first contact of the mechanical contact switch 302 is connected to the positive pole of the vehicle-mounted battery, and the second contact of the mechanical contact switch 302 is connected to the positive pole of the external electrical load.
In a preferred embodiment, the contactor status reading circuit 40 includes an image sensor 401 and an image processing chip 402,
the image sensor 401 is disposed within a preset range of the mechanical contact switch 302 to acquire image data of the mechanical contact switch 302, an output end of the image sensor 401 is connected to one end of the image processing chip 402, and the other end of the image processing chip 402 is connected to the microcontroller 10 to transfer the processed image data to the microcontroller 10.
The contactor status output circuit 50 includes a fifth resistor R5, a third switching device D3, a sixth resistor R6, a seventh resistor R7, and a fourth switching device D4.
One end of the fifth resistor R5 is connected to the microcontroller, and the other end of the fifth resistor R5 is connected to the control end of the third switching device D3, where the third switching device D3 may be an NPN triode.
The first connection terminal of the third switching device D3 is connected to the ground, the second connection terminal of the third switching device D3 is connected to one terminal of the sixth resistor R6, the other terminal of the sixth resistor R6 is connected to the control terminal of the fourth switching device D4, and the fourth switching device D4 may be a PMOS switch.
The first connection terminal of the fourth switching device D4 is connected to the power output terminal VCC of the power chip 601, and the second connection terminal of the fourth switching device D4 is connected to the external controller.
One end of the seventh resistor R7 is connected to the first connection terminal of the fourth switching device D4, and the other end of the seventh resistor R7 is connected to the other end of the sixth resistor R6.
The coil current collection circuit 70 includes an eighth resistor R8, an operational amplifier LM, a ninth resistor R9, and a second capacitor C2.
One end of the eighth resistor R8 is connected to the other end of the electromagnetic coil 301, and the other end of the eighth resistor R8 is grounded.
The positive input terminal of the operational amplifier LM is connected to the other end of the electromagnetic coil 301 as a first input terminal of the coil current collecting circuit 70, the negative input terminal of the operational amplifier LM is grounded, the power supply terminal of the operational amplifier LM is connected to the power supply output terminal VCC of the power supply chip 601 as a second input terminal of the coil current collecting circuit 70, and the ground terminal of the operational amplifier LM is grounded.
One end of the ninth resistor R9 is connected to the output terminal of the operational amplifier LM, and the other end of the ninth resistor R9 is connected to the microcontroller 10.
One end of the second capacitor C2 is connected to the other end of the ninth resistor R9, and the other end of the second capacitor C2 is grounded.
The contactor enable circuit 80 includes a tenth resistor R10 and an eleventh resistor R11, and the contactor current signal output circuit 90 includes a fifth switching device D5.
One end of the tenth resistor R10 is connected to the microcontroller 10, the other end of the tenth resistor R10 is grounded, one end of the eleventh resistor R11 is connected to one end of the tenth resistor R10, and the other end of the eleventh resistor R11 is connected to an external controller.
The control terminal of the fifth switching device D5 is connected to the microcontroller 10, the first connection terminal of the fifth switching device D5 is connected to the external controller, and the second connection terminal of the fifth switching device D5 is grounded.
In a specific embodiment, taking fig. 3 as an example, the working process of the intelligent contactor of the present application is as follows:
the contactor wake-up circuit 60 receives a wake-up signal output from the external controller, the wake-up signal enters the second input end of the power chip 601 through the fourth resistor R4 and the first capacitor C1, so that the power chip 601 is woken up, a corresponding voltage VCC is output from the output end of the power chip 601, power is supplied to a corresponding circuit inside the contactor, and the intelligent contactor is started, wherein the wake-up signal is a high-level signal, and under the condition that the external controller does not output the wake-up signal, the power chip 601 is in a dormant state, and the intelligent contactor is in the dormant state.
After the intelligent contactor is started, the microcontroller 10 detects an enable signal input by the external controller through the contactor enable circuit 80, if the microcontroller 10 detects an enable signal (high level signal) sent by the external controller through the contactor enable circuit 80, the microcontroller 10 outputs a contactor drive signal (high level signal) to the drive control circuit 20, at this time, the control end of the first switching device D1 is at a high level, the first switching device D1 is turned on, the second connection end of the first switching device D1 is pulled down, the second switching device D2 is turned on, and at this time, the electromagnetic coil 301 is in an energized state to close the contactor contact mechanical contact switch 302.
After the mechanical contact switch 302 is closed, the microcontroller 10 detects the current flowing through the electromagnetic coil 301 through the coil current acquisition circuit 70, and outputs the acquired current of the electromagnetic coil 301 to the external controller through the microcontroller 10 through the contactor current signal output circuit 90, and outputs the detected current of the electromagnetic coil 301 to the external controller through the fifth switching device D5 in the form of a PWM signal through a fixed frequency, wherein different duty cycles represent different currents, for example, the duty cycle is 0, representing the current of the electromagnetic coil 301 is 0A.
The image sensor 401 collects image data corresponding to the mechanical contact switch 302 and sequentially sends the image data to the image processing chip 402 for processing, the image processing chip 402 sends the processed image data to the microcontroller 10, the microcontroller 10 can obtain the state of the mechanical contact switch 302 according to the received image data, if the mechanical contact switch 302 is in a closed state, a high-level signal is output to the contactor state output circuit 50, at this time, the third switch device D3 is turned on, the second connection end of the third switch device D3 is pulled down and shows a low level, at this time, the fourth switch device D4 is turned on, the contactor state output circuit 50 outputs the high-level signal to the external controller, that is, after the external controller detects the high-level signal output by the contactor state output circuit 50, the external controller can directly determine that the intelligent contactor is in the closed state, that is, the external controller directly obtains the state of the intelligent contactor through the high-level signal output by the contactor state output circuit 50.
Similarly, if the mechanical contact switch 302 is in the off state, a low level signal is output to the contactor status output circuit 50, at this time, the third switching device D3 is turned off, the second connection end of the third switching device D3 is turned on, at this time, the fourth switching device D4 is turned off, the contactor status output circuit 50 outputs a low level signal to the external controller, at this time, the external controller detects the low level signal output by the contactor status output circuit 50, which indicates that the intelligent contactor is in the off state.
In summary, the present Shen Yi is as follows:
1. the intelligent sensor is internally provided with the image sensor, the image sensor chip and the microcontroller to acquire the contact closing state of the intelligent contactor, so that the non-contact judgment of the contact is realized.
2. The external control does not need to use a driving chip, so that the power consumption of the controller is reduced.
3. The external controller can judge the contact state only by detecting the state signal output by the intelligent contactor, and a high-voltage acquisition circuit is not needed, so that the circuit design is greatly simplified.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An intelligent contactor is characterized by comprising a microcontroller, a drive control circuit, an electromagnetic mechanical switch, a contactor state reading circuit and a contactor state output circuit,
the microcontroller is connected to a first input end of the drive control circuit, a second input end of the drive control circuit is connected to the vehicle-mounted storage battery, and an output end of the drive control circuit is connected to the electromagnetic mechanical switch;
the contactor state reading circuit is arranged in a preset range of the electromagnetic mechanical switch to acquire the contact state of the electromagnetic mechanical switch, and the output end of the contactor state reading circuit is connected to the microcontroller;
one end of the contactor status output circuit is connected to the microcontroller, and the other end of the contactor status output circuit is connected to an external controller.
2. The intelligent contactor of claim 1, wherein the drive control circuit comprises a first resistor, a first switching device, a second resistor, a third resistor, and a second switching device,
one end of the first resistor is used as a first input end of the driving control circuit to be connected to the microcontroller, and the other end of the first resistor is connected to a control end of the first switching device;
the first connecting end of the first switch device is connected to the ground, the second connecting end of the first switch device is connected to one end of the second resistor, and the other end of the second resistor is connected to the control end of the second switch device;
the first connecting end of the second switch device is used as a second input end of the drive control circuit to be connected to the vehicle-mounted storage battery, and the second connecting end of the second switch device is used as an output end of the drive control circuit to be connected to the electromagnetic mechanical switch;
one end of the third resistor is connected to the first connection end of the second switching device, and the other end of the third resistor is connected to the other end of the second resistor.
3. The intelligent contactor according to claim 1, further comprising a contactor wake-up circuit,
the first input end of the contactor wake-up circuit is connected to the vehicle-mounted storage battery, the second input end of the contactor wake-up circuit is connected to an external controller, and the output ends of the contactor wake-up circuit are respectively connected to the microcontroller, the electromagnetic mechanical switch and the contactor state output circuit.
4. The intelligent contactor according to claim 3, wherein the contactor wake up circuit comprises a power chip, a first capacitor and a fourth resistor,
the first input end of the power chip is used as the first input end of the contactor wake-up circuit and is connected to the vehicle-mounted storage battery, the second input end of the power chip is used as the second input end of the contactor wake-up circuit and is connected to one end of the fourth resistor, and the power output end of the power chip is used as the output end of the contactor wake-up circuit and is respectively connected to the microcontroller, the electromagnetic mechanical switch and the contactor state output circuit;
one end of the first capacitor is grounded, the other end of the first capacitor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the external controller.
5. The intelligent contactor according to claim 4, further comprising a coil current acquisition circuit, the electromagnetic mechanical switch comprising an electromagnetic coil and a mechanical contact switch, the drive control circuit comprising a second switching device,
one end of the electromagnetic coil is connected to a second connecting end of the second switching device, the other end of the electromagnetic coil is connected to a first input end of the coil current acquisition circuit, a second input end of the coil current acquisition circuit is connected to a power supply output end of the power supply chip, and an output end of the coil current acquisition circuit is connected to the microcontroller;
the first contact of the mechanical contact switch is connected to the positive electrode of the vehicle-mounted storage battery, and the second contact of the mechanical contact switch is connected to the positive electrode of the external electric load.
6. The intelligent contactor according to claim 5, wherein the contactor status reading circuit comprises an image sensor and an image processing chip,
the image sensor is arranged in a preset range of the mechanical contact switch to acquire image data of the mechanical contact switch;
the output end of the image sensor is connected to one end of the image processing chip, and the other end of the image processing chip is connected to the microcontroller.
7. The intelligent contactor according to claim 4, wherein the contactor status output circuit comprises a fifth resistor, a third switching device, a sixth resistor, a seventh resistor, and a fourth switching device,
wherein one end of the fifth resistor is connected to the microcontroller, and the other end of the fifth resistor is connected to the control end of the third switching device;
the first connecting end of the third switching device is connected to the ground, the second connecting end of the third switching device is connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to the control end of the fourth switching device;
the first connecting end of the fourth switch device is connected to the power output end of the power chip, and the second connecting end of the fourth switch device is connected to the external controller;
one end of the seventh resistor is connected to the first connection end of the fourth switching device, and the other end of the seventh resistor is connected to the other end of the sixth resistor.
8. The intelligent contactor according to claim 5, wherein the coil current acquisition circuit comprises an eighth resistor, an operational amplifier, a ninth resistor, and a second capacitor,
one end of the eighth resistor is connected to the other end of the electromagnetic coil, and the other end of the eighth resistor is grounded;
the positive input end of the operational amplifier is used as a first input end of the coil current acquisition circuit to be connected to the other end of the electromagnetic coil, the negative input end of the operational amplifier is grounded, the power supply end of the operational amplifier is used as a second input end of the coil current acquisition circuit to be connected to the power supply output end of the power supply chip, and the grounding end of the operational amplifier is grounded;
one end of the ninth resistor is connected to the output end of the operational amplifier, and the other end of the ninth resistor is connected to the microcontroller;
one end of the second capacitor is connected to the other end of the ninth resistor, and the other end of the second capacitor is grounded.
9. The intelligent contactor according to claim 1, further comprising a contactor enable circuit and a contactor current signal output circuit,
wherein an input of the contactor enable circuit is connected to an external controller and an output of the contactor enable circuit is connected to the microcontroller;
the output end of the contactor current signal output circuit is connected to an external controller, and the input end of the contactor current signal output circuit is connected to the microcontroller.
10. The intelligent contactor according to claim 9, wherein the contactor enable circuit comprises a tenth resistor and an eleventh resistor, the contactor current signal output circuit comprises a fifth switching device,
wherein one end of the tenth resistor is connected to the microcontroller, the other end of the tenth resistor is grounded, one end of the eleventh resistor is connected to one end of the tenth resistor, and the other end of the eleventh resistor is connected to an external controller;
the control end of the fifth switch device is connected to the microcontroller, the first connection end of the fifth switch device is connected to the external controller, and the second connection end of the fifth switch device is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223482903.7U CN218975348U (en) | 2022-12-26 | 2022-12-26 | Intelligent contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223482903.7U CN218975348U (en) | 2022-12-26 | 2022-12-26 | Intelligent contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218975348U true CN218975348U (en) | 2023-05-05 |
Family
ID=86162409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223482903.7U Active CN218975348U (en) | 2022-12-26 | 2022-12-26 | Intelligent contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218975348U (en) |
-
2022
- 2022-12-26 CN CN202223482903.7U patent/CN218975348U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107985229A (en) | Battery management system and its control method | |
| CN105978099A (en) | Low-voltage power supply management system for electric car | |
| CN205811597U (en) | A kind of electric automobile low tension management system | |
| CN107591859B (en) | Wireless charging receiving controller protection method and device | |
| CN102948035A (en) | Power supply control circuit and power supply control apparatus | |
| CN108556669B (en) | Vehicle-mounted charger and control device thereof | |
| CN108628431A (en) | Electronic equipment and its certainly energy consumption control circuit | |
| EP4027160B1 (en) | Universal plug status detection circuit | |
| CN208421767U (en) | Electronic equipment and its consumable can control circuit | |
| CN218975348U (en) | Intelligent contactor | |
| WO2022082503A1 (en) | Relay adhesion detection circuit, method and system | |
| CN216507988U (en) | Pre-discharge circuit and power battery | |
| CN115102261A (en) | Self-locking circuit | |
| CN112216557B (en) | High-efficiency signal circuit, control system and electrical equipment | |
| CN212811664U (en) | Geomagnetic detection Hall switch | |
| CN205059485U (en) | A dormancy control circuit and electric automobile controller for electric automobile controller | |
| CN212751817U (en) | Energy recovery device of motor controller | |
| CN101762395B (en) | Durability test device for automotive air-conditioning condenser fan | |
| CN111289882B (en) | Push-pull output PWM open circuit detection circuit and method and vehicle | |
| CN211653017U (en) | Circuit device for detecting overcurrent performance of vehicle-mounted connector | |
| CN104283472B (en) | Voltage regulator and its excessively low voltage protection circuit | |
| CN210007431U (en) | kinds of circuits | |
| CN2779419Y (en) | Pre-detection circuit for automobile load short circuit | |
| CN209282925U (en) | A kind of driving circuit for automatic transfer switching electric appliance controller | |
| CN214622953U (en) | Relay self-checking circuit and relay system of grid-connected inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |