CN213482400U - Contactor state detection circuit, system and vehicle - Google Patents
Contactor state detection circuit, system and vehicle Download PDFInfo
- Publication number
- CN213482400U CN213482400U CN202022366909.2U CN202022366909U CN213482400U CN 213482400 U CN213482400 U CN 213482400U CN 202022366909 U CN202022366909 U CN 202022366909U CN 213482400 U CN213482400 U CN 213482400U
- Authority
- CN
- China
- Prior art keywords
- contactor
- signal detector
- current signal
- detection circuit
- state detection
- 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
Abstract
The application provides a contactor state detection circuit, a system and a vehicle, wherein the contactor state detection circuit comprises a first power supply, a first contactor, a current signal detector and a voltage acquisition unit, one end of the first power supply is connected with one end of the first contactor, and the first contactor is connected between a charging interface and a battery in series; the other end of the first power supply is connected with the first end of the current signal detector; the second end of the current signal detector is connected with the other end of the first contactor, and the third end of the current signal detector is used for outputting a voltage signal representing the opening and closing state of the first contactor; the third end of the current signal detector is connected with the voltage acquisition unit, and the voltage acquisition unit is used for determining the state of the first contactor according to the voltage signal output by the current signal detector. By implementing the method and the device, the state of the first contactor is detected through the output voltage of the current signal detector, so that the state of the contactor is accurately judged.
Description
Technical Field
The utility model belongs to the technical field of electric automobile and specifically relates to a contactor state detection circuitry, system and vehicle.
Background
The contactor is a switching device which closes contacts by utilizing a magnetic field generated by current flowing through a coil and opens the contacts when electromagnetic attraction disappears when the coil is powered off. In the large-current charging device, a contactor is arranged between a battery and a charging interface, and the contactor is specifically connected as shown in fig. 1, so that the contactor plays an isolation role after the charging is stopped and plays a connection role during the charging.
Along with electric automobile's development, electric automobile's the speed of charging is higher and higher, and charging current is also bigger and bigger, and the condition of adhesion frequently appears in the contactor, when the contactor takes place the adhesion, can't make the contact disconnection of contactor through the coil outage, the interface that charges like this because the contactor contact is closed, and the state that does not charge is constantly and battery intercommunication, leads to battery voltage to reflect on the interface that charges, and the interface that charges promptly is in high-voltage status constantly, has brought very big potential safety hazard like this.
SUMMERY OF THE UTILITY MODEL
The application provides a contactor state detection circuit, system and vehicle, can accurately judge the state of contactor.
In a first aspect, an embodiment of the present application provides a contactor state detection circuit, the contactor state detection circuit includes a first power supply, a first contactor, a current signal detector, and a voltage acquisition unit, wherein:
one end of the first power supply is connected with one end of the first contactor, and the first contactor is connected between the charging interface and the battery in series;
the other end of the first power supply is connected with the first end of the current signal detector;
the second end of the current signal detector is connected with the other end of the first contactor, and the third end of the current signal detector is used for outputting a voltage signal representing the opening and closing state of the first contactor;
and the third end of the current signal detector is connected with the voltage acquisition unit, and the voltage acquisition unit is used for determining the state of the first contactor according to the voltage signal output by the current signal detector.
In a possible embodiment, the contactor state detection circuit further comprises a second contactor and a second power supply, and the second contactor and the first contactor have a mechanical linkage relationship;
one end of the second contactor is connected with the second power supply, and the other end of the second contactor is connected with the voltage acquisition unit.
In a possible implementation manner, the contactor state detection circuit further includes a constant current source, and the constant current source includes an input end and an output end;
the other end of the first power supply is connected with the first end of the current signal detector:
the other end of the first power supply is connected with the input end of the constant current source, the output end of the constant current source is connected with the first end of the current signal detector, and the constant current source is used for providing constant current for the current signal detector.
In another possible implementation manner, the contactor state detection circuit further includes at least one resistor, and the other end of the first power source is connected in series to the first end of the current signal detector through the at least one resistor.
Further, the contactor state detection circuit further comprises a switch tube and a battery management unit;
the first contactor is connected between the charging interface and the battery in series:
one end of the first contactor is connected with the charging interface, the other end of the first contactor is connected with the first end of the switch tube, the second end of the switch tube is connected with the battery, the third end of the switch tube is connected with the battery management unit, and the battery management unit is used for controlling the on-off of the switch tube according to a voltage signal representing the opening and closing state of the first contactor.
Optionally, the current signal detector includes any one of a hall current sensor, a current transformer and/or a sampling resistor.
Further, contactor state detection circuitry still includes the protection unit, the one end of protection unit is connected the output of constant current source, the other end of protection unit is connected the first end of current signal detector, the protection unit is used for when the voltage at first contactor both ends reaches the predetermined threshold value, the protection contactor state detection circuitry.
Optionally, the protection unit is a field effect transistor, and the contactor state detection circuit further includes a battery management unit;
one end of the protection unit is connected with the output end of the constant current source, and the other end of the protection unit is connected with the first end of the current signal detector:
the drain electrode of the field effect transistor is connected with the output end of the constant current source, and the source electrode of the field effect transistor is connected with the first end of the current signal detector;
and the grid electrode of the field effect tube is connected with the battery management unit.
In a second aspect, an embodiment of the present application further provides a contactor state detection system, where the contactor state detection system includes a charging interface, a battery, and any one of the above possible contactor state detection circuits.
In a third aspect, embodiments of the present application further provide a vehicle, where the vehicle includes any one of the above possible contactor state detection circuits.
Contactor state detection circuitry in this application includes first power, first contactor, current signal detector and voltage acquisition unit, wherein: one end of the first power supply is connected with one end of the first contactor, and the first contactor is connected between the charging interface and the battery in series; the other end of the first power supply is connected with the first end of the current signal detector; the second end of the current signal detector is connected with the other end of the first contactor, and the third end of the current signal detector is used for outputting a voltage signal representing the opening and closing state of the first contactor; and the third end of the current signal detector is connected with the voltage acquisition unit, and the voltage acquisition unit is used for determining the state of the first contactor according to the voltage signal output by the current signal detector. According to the method and the device, the state of the first contactor is detected through the output voltage of the current signal detector, if the voltage acquisition unit acquires that the current signal detector does not have the output voltage, the first contactor can be determined to be disconnected, and if the voltage acquisition unit acquires that the current signal detector has the voltage output, the first contactor can be determined to be in the closed state, so that the state of the contactor can be accurately judged.
Drawings
Fig. 1 is a block diagram of a contactor application according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a contactor state detection circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a contactor state detection circuit according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another contactor status detection circuit provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of yet another contactor state detection circuit provided by an embodiment of the present application;
fig. 6 is a block diagram of a contactor state detection system according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a block diagram of a contactor state detection circuit according to an embodiment of the present disclosure. As shown in fig. 2, the contactor state detection circuit 20 includes a first power supply 200, a first contactor 201, a current signal detector 202, and a voltage acquisition unit 203, wherein:
one end of the first power source 200 is connected with one end of the first contactor 201, and the first contactor 201 is connected in series between the charging interface 21 and the battery 22;
the other end of the first power supply 200 is connected to a first end of the current signal detector 202;
a second end of the current signal detector 202 is connected to the other end of the first contactor 201, and a third end of the current signal detector 202 is configured to output a voltage signal indicating an open/close state of the first contactor 201;
the third end of the current signal detector 202 is connected to the voltage collecting unit 203, and the voltage collecting unit 203 is configured to determine the state of the first contactor 201 according to the voltage signal output by the current signal detector 202.
Specifically, the first power supply 200 is configured to provide an operating voltage to the current signal detector 202, and optionally, the first power supply 200 may be a constant voltage source. The current signal detector 202 includes any one of a hall current sensor, a current transformer, and/or a sampling resistor. Taking the hall current sensor as an example, the hall current sensor is a component using the hall effect principle, a current Ic is introduced from a control current end of the component, the control current end is the first end and the second end of the current signal detector 202, and a magnetic field with a magnetic induction intensity of B is applied in a normal direction of a component plane, so that a potential VH is generated in a direction perpendicular to the current and magnetic field directions (i.e., between output ends), and the output end is the third end of the sensor 202. The voltage acquisition unit 203 may be an integrated chip with an Analog-to-Digital Converter (ADC) function, such as a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a field-programmable gate array (FPGA), or other transistor logic devices. Optionally, the current signal detector 202 may also be a sampling resistor, which is connected in series in the contactor state detection circuit 20 and is configured to collect a loop current of the contactor state detection circuit 20, when the first contactor 201 is closed, the contactor state detection circuit 20 has a loop current, the voltage collection unit 203 collects a voltage across the sampling resistor, and if a voltage is collected across the resistor, it is determined that the first contactor 201 is in a closed state.
The principle of the contactor state detection circuit 20 is as follows:
the first power supply 200, the first contactor 201 and the current signal detector 202 form a closed loop, and the current signal detector 202 collects loop current in the closed loop and outputs a voltage signal when the current is collected. When the first contactor 201 is in an open state, no current flows in the closed loop, that is, no current is collected by the current signal detector 202, and no voltage signal is output; when the first contactor 201 is in a closed state, a current flows through the closed loop, and the current signal detector 202 collects the current, thereby outputting a voltage signal. The voltage acquisition unit 203 acquires the output voltage of the current signal detector 202, and if the voltage acquisition unit 203 acquires that the current signal detector 202 has the output voltage, that is, the current signal detector 202 outputs a high level, the voltage acquisition unit 203 determines that the first contactor 201 is in a closed state; if the voltage acquisition unit 203 acquires that the current signal detector 202 does not output voltage, that is, the current signal detector 202 outputs a low level, the voltage acquisition unit 203 determines that the first contactor 201 is in an open state.
Further, the voltage acquisition unit 203 may determine whether the first contactor 201 is in the stuck state or the normally closed state according to the state of the first contactor 201 and whether the charging interface 21 has an insertion signal. For example, the charging interface 21 has an insertion signal indicating that an external device is charging the battery 22, and the first contactor 201 is in a closed state, which is a normal closed state; if the charging interface 21 is not plugged in a signal, i.e. if an external device is not charging the battery 22, the first contactor 201 should be in the open state, and if the first contactor 201 is in the closed state, it indicates that the contact of the first contactor 201 is stuck, i.e. the first contactor 201 is in the stuck state. Alternatively, the insertion signal may be sent by the charging interface 21, that is, the charging interface 21 has a function of detecting the insertion of an external device.
The block diagram of fig. 2 will be described with reference to specific components. Referring to fig. 3, fig. 3 is a schematic diagram of a contactor state detection circuit according to an embodiment of the present application. As shown in fig. 3, the first contactor KM1 is connected in series between the charging interface 31 and the battery 32, one end of the first power source U1 is connected to the first end of the current sensor S1, and either the positive pole or the negative pole of the first power source U1 can be connected to the first end of the current signal detector S1, which is not limited in this application as to whether the positive pole or the negative pole of the power source is connected to the first end of the current signal detector S1. Taking the example that the positive electrode of the first power source U1 is connected to the first end of the current signal detector S1, the negative electrode of the first power source U1 is connected to one end of the first contactor KM1, and the second end of the current signal detector S1 is connected to the other end of the first contactor KM 1. It should be noted that the contactor includes two parts, one part is a contact part, the other part is a coil part, the coil part is used for generating a magnetic field according to the current, so as to attract the contacts to pull in, and the connection relationship of the contactor in this application is not limited to the connection relationship of the coil part for the contact part. The third end of the current signal detector S1 is connected to a voltage acquisition unit Q1, the voltage acquisition unit Q1 is configured to acquire an output voltage of the current signal detector S1, if the first contactor KM1 is in a closed state, a current is generated in a closed loop formed by the first power source U1, the current signal detector S1 and the first contactor KM1, and the current signal detector S1 outputs a voltage signal; if the first contactor KM1 is in an open state, the first power source U1, the current signal detector S1 and the first contactor KM1 do not form a closed loop, and the current signal detector S1 does not output a voltage signal. The voltage collecting unit Q1 determines the open/close state of the first contactor KM1 according to whether there is a voltage signal output from the current signal detector S1.
In a possible embodiment, in order to eliminate interference of other factors in the circuit with the output of the voltage signal of the current signal detector, a constant current source is connected to the contactor state detection circuit, and the constant current source comprises an input end and an output end, based on the above description in conjunction with fig. 3. Specifically, referring to fig. 4, fig. 4 is a schematic diagram of another contactor state detection circuit provided in the embodiment of the present application. As shown in fig. 4, the other end of the first power source U2 is connected to the input terminal of the constant current source i1, the output terminal of the constant current source i1 is connected to the first terminal of the current signal detector S2, and the constant current source i1 is used for supplying a constant current to the current signal detector S2. When the first contactor KM2 is in a closed state, it is ensured that the current signal detector S2 can detect current, and thus, a voltage signal can be output according to the detected current, so that a situation that when the first contactor KM2 is closed, the current signal detector S2 cannot detect current due to shunting or interference of other circuits, and misjudgment occurs is avoided.
In another possible embodiment, in order to protect the closed loop formed by the first power source, the first contactor and the current signal detector, at least one resistor is connected to the contactor detection circuit, and the other end of the first power source U1 is connected in series to the first end of the current signal detector S1 through the at least one resistor, based on the above description in conjunction with fig. 3. Specifically, in the embodiment described above with reference to fig. 3, the first power source U1 directly provides voltage to the current signal detector S1, the voltage of the first power source U1 generates current through the wire therebetween and the internal resistance of the current signal detector S1, and since the internal resistance of the current signal detector S1 and the wiring resistance between the first power source U1 and the current signal detector S1 are generally not large, in implementing this embodiment, at least one resistor is connected to the contactor state detection circuit 30, so that the closed loop circuit currents of the first power source U1, the first contactor KM1 and the current signal detector S1 can be reduced, and the reliability of the contactor state detection circuit can be improved.
Further, in the embodiment described above with reference to fig. 4, the contactor state detection circuit further includes a switch tube and a battery management unit, as shown in fig. 4, one end of the first contactor KM2 is connected to the charging interface 41, the other end of the first contactor KM2 is connected to the first end of the switch tube K1, the second end of the switch tube K1 is connected to the battery 42, the third end of the switch tube K1 is connected to the battery management unit Q3, and the battery management unit Q3 is configured to control on/off of the switch tube K1 according to a voltage signal indicating an open/close state of the first contactor KM 2. Specifically, the battery management unit Q3 and the voltage acquisition unit Q2 may be units integrated in the same integrated chip, and the battery management unit Q3 is configured to output a control signal to the switching tube K1 according to the voltage signal acquired by the voltage acquisition unit Q2. For example, the switch tube K1 is a field effect transistor, the field effect transistor is turned off when the battery management unit Q3 outputs a high level, and the field effect transistor is turned on when the battery management unit Q3 outputs a low level, and when the voltage acquisition unit Q2 acquires a voltage output signal, it represents that the first contactor KM2 is in a closed state, and further, it may also be determined whether the first contactor KM2 is in an adhesion state by combining an insertion signal sent by the charging interface 41, and the specific implementation process may refer to the embodiment described in conjunction with fig. 2, which is not described herein again. The battery management unit Q3 outputs high level to the switch tube K1, the switch tube K1 is open, and because the first contactor KM2 and the switch tube K1 are in series, when the switch tube K1 is in an open state, even if the first contactor KM2 is in a closed state, the charging interface 41 and the battery 42 are not connected together, so that the voltage of the charging interface 41 is reduced to zero instead of the battery voltage, and the safety of the use of the charging interface is greatly improved.
Further, the contactor state detection circuit 40 further comprises a protection unit, one end of the protection unit is connected with the output end of the constant current source, the other end of the protection unit is connected with the first end of the current signal detector, and the protection unit is used for protecting the contactor state detection circuit when the voltage at the two ends of the first contactor reaches a preset threshold value. Illustratively, as shown in fig. 4, the protection unit is a field effect transistor Q1. Optionally, the drain of the fet Q1 is connected to the output of the constant current source i1, the source of the fet Q1 is connected to the first end of the current signal detector S2, the gate of the fet Q1 is connected to the battery management unit Q3, and the battery management unit Q3 is configured to output a voltage signal to the fet Q1 when the voltage across the first contactor KM2 is greater than a preset threshold, and control the fet Q1 to open, so that the contactor state detection circuit 40 opens. By implementing the embodiment, the contactor state detection circuit can be disconnected under the condition that the voltage across the first contactor is too high, so that the use safety of the contactor state detection circuit is improved.
On the basis of the above description in conjunction with fig. 3, in order to further improve the reliability of the state detection of the first contactor, the present application may further determine the state of the first contactor by performing state detection on a second contactor having a mechanical linkage relationship with the first contactor. In one possible implementation, referring to fig. 5, fig. 5 is a schematic diagram of a contactor state detection circuit according to an embodiment of the present application. As shown in fig. 5, the contactor state detection circuit 50 includes a first power source U3, a first contactor KM3, a current signal detector S3, and the voltage acquisition unit Q4, and the specific implementation process may refer to the embodiment described in conjunction with fig. 3, which is not described herein again. Optionally, the contactor state detection circuit 50 may further include a constant current source i2, and further, the contactor state detection circuit 50 may further include a switch tube K2 and a battery management unit Q5, and the specific implementation process may refer to the embodiment described in conjunction with fig. 4, which is not described herein again.
The contactor state detection circuit 50 further comprises a second contactor KM4 and a second power supply U4, wherein the second contactor KM4 and the first contactor KM3 have a mechanical linkage relationship; one end of the second contactor KM4 is connected to the second power source U4, and the other end of the second contactor KM4 is connected to the voltage collecting unit Q4. Specifically, the voltages of the first power source U3 and the second power source U4 may be the same, and it is known that the open/close state of the second contactor KM4 and the open/close state of the first contactor KM3 have a correlation due to the mechanical linkage relationship between the second contactor KM4 and the first contactor KM 3. For example, the first contactor KM3 and the second contactor KM4 are in the same state, that is, the first contactor KM3 is in a closed state, and the second contactor KM4 is also closed; for another example, the first contactor KM3 is in the same state as the second contactor KM4, but in the opposite state, that is, the first contactor KM3 is in the closed state, and the second contactor KM4 is in the open state. Taking the example that the first contactor KM3 and the second contactor KM4 are in the same state, when the first contactor KM3 is closed, the second contactor KM4 is subsequently closed, the voltage of the second power source U4 is transmitted to the voltage acquisition unit Q4 through the second contactor KM4, and the voltage acquisition unit Q4 determines that the second contactor KM4 is in a closed state according to the fact that the voltage acquired by the second contactor KM4 is at a high level, so as to determine that the first contactor KM3 is in a closed state. Alternatively, it may be determined that the first contactor KM3 is in the closed state according to the fact that the voltage acquisition unit Q4 acquires that any one of the voltage of the second contactor KM4 or the output voltage signal of the current signal detector S3 is at a high level. By implementing the embodiment, the reliability of the state detection of the first contactor KM3 is further improved by adding the state detection of the second contactor KM4 having a mechanical linkage relationship with the first contactor KM 3.
Referring to fig. 6, fig. 6 is a block diagram of a contactor state detection system according to an embodiment of the present disclosure. As shown in fig. 6, the contactor state detection system 60 includes a charging interface 600, a battery 602, and any one of the possible contactor state detection circuits 601 described above with reference to fig. 1 to 5, wherein the contactor state detection circuit 601 includes at least one contactor, the charging interface 600 is configured to receive a charging current of an external device, and the contactor in the contactor state detection circuit 601 is configured to connect the charging interface 600 with the battery 602, so that the charging current of the external device can be provided to the battery 602. The contactor state detection circuit 601 is configured to detect an open/close state of a contactor connected in series between the charging interface 600 and the battery 602.
In one possible application scenario, the embodiment of the present application further provides a vehicle including any one of the possible contactor state detection circuits described above with reference to fig. 1 to 5.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It is understood that the corresponding examples of fig. 1 to 5 are only used for explaining the embodiments of the present application, and should not be construed as limiting, and in the alternative, fig. 1 and 5 may also have other implementations, for example, the voltage collecting unit and the battery management unit may be integrated into one unit, and the like, and are not listed here.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.
Claims (10)
1. The utility model provides a contactor state detection circuitry, its characterized in that, contactor state detection circuitry includes first power, first contactor, current signal detector and voltage acquisition unit, wherein:
one end of the first power supply is connected with one end of the first contactor, and the first contactor is connected between the charging interface and the battery in series;
the other end of the first power supply is connected with the first end of the current signal detector;
the second end of the current signal detector is connected with the other end of the first contactor, and the third end of the current signal detector is used for outputting a voltage signal representing the opening and closing state of the first contactor;
and the third end of the current signal detector is connected with the voltage acquisition unit, and the voltage acquisition unit is used for determining the state of the first contactor according to the voltage signal output by the current signal detector.
2. The contactor status detection circuit according to claim 1, further comprising a second contactor having a mechanical linkage relationship with the first contactor, and a second power source;
one end of the second contactor is connected with the second power supply, and the other end of the second contactor is connected with the voltage acquisition unit.
3. The contactor state detection circuit of claim 1, further comprising a constant current source comprising an input and an output;
the other end of the first power supply is connected with the first end of the current signal detector:
the other end of the first power supply is connected with the input end of the constant current source, the output end of the constant current source is connected with the first end of the current signal detector, and the constant current source is used for providing constant current for the current signal detector.
4. The contactor state detection circuit of claim 1, further comprising at least one resistor through which the other terminal of the first power source is connected in series to the first terminal of the current signal detector.
5. The contactor state detection circuit according to claim 1, further comprising a switching tube and a battery management unit;
the first contactor is connected between the charging interface and the battery in series:
one end of the first contactor is connected with the charging interface, the other end of the first contactor is connected with the first end of the switch tube, the second end of the switch tube is connected with the battery, the third end of the switch tube is connected with the battery management unit, and the battery management unit is used for controlling the on-off of the switch tube according to a voltage signal representing the opening and closing state of the first contactor.
6. The contactor status detection circuit according to any of claims 1-5, wherein the current signal detector comprises any of a Hall current sensor, a current transformer and/or a sampling resistor.
7. The contactor state detection circuit of claim 3, further comprising a protection unit;
the output end of the constant current source is connected with the first end of the current signal detector, and the first end of the current signal detector is as follows:
the one end of protection unit is connected the output of constant current source, the other end of protection unit is connected the first end of current signal detector, the protection unit is used for when the voltage at first contactor both ends reaches the predetermined threshold value, the protection contactor state detection circuitry.
8. The contactor status detection circuit according to claim 7, wherein the protection unit is a field effect transistor, the contactor status detection circuit further comprising a battery management unit;
one end of the protection unit is connected with the output end of the constant current source, and the other end of the protection unit is connected with the first end of the current signal detector:
the drain electrode of the field effect transistor is connected with the output end of the constant current source, and the source electrode of the field effect transistor is connected with the first end of the current signal detector;
and the grid electrode of the field effect tube is connected with the battery management unit.
9. A contactor status detection system, comprising a charging interface, a battery, and the contactor status detection circuit of any one of claims 1-8.
10. A vehicle characterized by comprising the contactor state detection circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022366909.2U CN213482400U (en) | 2020-10-21 | 2020-10-21 | Contactor state detection circuit, system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022366909.2U CN213482400U (en) | 2020-10-21 | 2020-10-21 | Contactor state detection circuit, system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213482400U true CN213482400U (en) | 2021-06-18 |
Family
ID=76367100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022366909.2U Active CN213482400U (en) | 2020-10-21 | 2020-10-21 | Contactor state detection circuit, system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213482400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
-
2020
- 2020-10-21 CN CN202022366909.2U patent/CN213482400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113330323A (en) * | 2020-10-21 | 2021-08-31 | 深圳欣锐科技股份有限公司 | Contactor state detection circuit, system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113330323A (en) | Contactor state detection circuit, system and vehicle | |
| CN203519737U (en) | Electric vehicle test system possessing scram and insulation protection functions | |
| CN103338029B (en) | A kind of automatic reset device | |
| CN213482400U (en) | Contactor state detection circuit, system and vehicle | |
| CN217954698U (en) | Broken wire detection circuit | |
| CN109217425A (en) | A kind of charger circuit and its intelligent charge control method | |
| CN106771997A (en) | A kind of energy-storage system contactor adhesion detection means | |
| CN216056332U (en) | Anti-reverse connection circuit and charger | |
| CN209675960U (en) | A kind of preliminary filling protective device | |
| CN216056395U (en) | Charging circuit, cleaning device and cleaning system | |
| CN107069850A (en) | A kind of automobile starting power supply wiring folder, which comes off, to be protected and reverse connecting protection system and method | |
| CN207382017U (en) | The charger detection circuit and battery management system of a kind of battery management system | |
| CN206685314U (en) | A kind of relay with load faulty detection function | |
| CN115579999B (en) | Battery operation management system and battery operation management method | |
| CN216848061U (en) | Adhesion detection circuit of contactor, vehicle-mounted quick-charging contactor and battery car | |
| CN203965553U (en) | Processing and the diagnostic circuit thereof of a kind of AD signal or switching signal | |
| CN206178103U (en) | Energy storage system contactor adhesion detection device | |
| CN106253398B (en) | A kind of circuit for detecting and charger based on charging | |
| CN207475279U (en) | Energy-efficient emergency power supply control switching circuit | |
| CN213482398U (en) | Main and negative relay detection system | |
| CN206559103U (en) | A kind of automobile starting power supply wiring folder, which comes off, to be protected and reverse connecting protection system | |
| CN209525422U (en) | A kind of test circuit | |
| CN110133431A (en) | The positive-negative connected detection circuit of battery and the electronic equipment with charge function | |
| CN108237305A (en) | Electric welding machine power-down protection apparatus and electric welding machine | |
| CN208672722U (en) | A kind of DC load fault condition detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |