CN219997252U - Switch detection device, domain controller, automobile chassis and automobile - Google Patents
Switch detection device, domain controller, automobile chassis and automobile Download PDFInfo
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Abstract
The utility model discloses a switch detection device, a domain controller, an automobile chassis and an automobile, and relates to the technical field of automobile electronics. The utility model comprises a high-side switch module, a switch, a first detection module, a power supply switch module and a low-side switch module, wherein one end of the high-side switch module is coupled with a first power supply, the other end of the high-side switch module is coupled with the switch, and a power supply output end of the power supply switch module is coupled with the first detection module and is used for supplying power to the first detection module. The driving end of the low-side switch module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for driving the switch; and the first detection module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for detecting the working voltage value of the switch. Therefore, the diagnosis function of the electrical faults of the switch can be realized by arranging a circuit at the periphery of the low-side switch module, and the product cost is greatly reduced.
Description
Technical Field
The utility model relates to the technical field of automobile electronics, in particular to a switch detection device, a domain controller, an automobile chassis and an automobile.
Background
With the development of automobile electronic technology, automobile chassis also integrate more and more electric control components, such as an air spring switch valve, a compressor isolation valve and the like. The chassis domain controller is provided with a high-side driving circuit and a low-side driving circuit for driving and controlling each valve switch, the high-side driving circuit and the low-side driving circuit not only need to realize driving of the valve switch, but also need to realize protection functions for abnormal working conditions such as over-temperature, over-voltage, over-current and the like, and meanwhile, the chassis domain controller also needs to have diagnosis functions for electrical faults such as short circuit to a power supply, short circuit to the ground, load open circuit and the like.
However, the low-side driving chip further integrates an electrical fault diagnosis function in addition to a protection function which is usually carried by the low-side driving chip, but the price of the low-side driving chip is relatively high. Each valve switch in the chassis of the automobile needs an independent low-side driving chip, so that the cost of the domain controller system can be obviously increased under the condition of a large number of controlled valve switches.
Disclosure of Invention
The present utility model has been made in view of the above problems, and has as its object to provide a switch detection device, a domain controller, an automobile chassis and an automobile which overcome or at least partially solve the above problems.
The utility model provides a switch detection device, which comprises a high-side switch module, a switch, a first detection module, a power supply switch module and a low-side switch module, wherein:
one end of the high-side switch module is coupled with a first power supply, the other end of the high-side switch module is coupled with the switch, and a power supply output end of the power supply switch module is coupled with the first detection module and is used for supplying power to the first detection module;
the driving end of the low-side switch module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for driving the switch; and, in addition, the processing unit,
the first detection module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for detecting the working voltage value of the switch.
Optionally, the first detection module includes a first resistor, a second resistor and a third resistor sequentially connected in series;
the first resistor is coupled with the power supply output end of the power supply switch module, the first resistor, the second resistor and the switch are coupled to form a voltage division node, the third resistor is connected with the second resistor in series and then grounded, and the driving end of the low-side switch module is coupled with the voltage division node.
Optionally, the power supply switch module includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first triode and a second triode;
one end of the fifth resistor is coupled with one end of the fourth resistor, the other end of the fifth resistor is coupled with the emitter of the first triode and then grounded, one end of the fourth resistor is coupled with the base electrode of the first triode, one end of the sixth resistor is coupled with the collector electrode of the first triode, and the other end of the sixth resistor is coupled with one end of the seventh resistor and the base electrode of the second triode;
the emitter of the second triode and the other end of the seventh resistor are respectively coupled with the power supply input end of a second power supply, and the collector of the second triode is used as a power supply output end and is coupled with the first resistor.
Optionally, a driving diode is further connected in series between the driving end of the low-side switch module and the voltage dividing node, and an anode of the driving diode is coupled with the voltage dividing node.
Optionally, the circuit further comprises a first capacitor, and the first capacitor is connected in parallel with the third resistor.
Optionally, the circuit further includes a second capacitor and an electrostatic protection diode, wherein one end of the second capacitor and a negative electrode of the electrostatic protection diode are respectively coupled with the voltage division node, and the other end of the second capacitor and a positive electrode of the electrostatic protection diode are respectively grounded.
Optionally, the circuit further includes a microcontroller, the microcontroller including a first detection input, a second detection input, a power supply control output, and a low-side control output; wherein,
the first detection input end is coupled with the first detection node, the second detection input end is coupled with the second detection node, and the power supply control output end is coupled with the other end of the fourth resistor for adjusting the working voltage values of the first triode and the second triode; the method comprises the steps of,
the low-side control output end is coupled with the enabling end of the low-side switch module and used for adjusting the working voltage value of the low-side switch module.
Optionally, a voltage detection module is further coupled between the second detection input terminal and the emitter of the second triode.
The utility model also provides a domain controller, which comprises any one of the switch detection devices.
The utility model also provides an automobile chassis comprising the domain controller.
The utility model further provides an automobile, which comprises the automobile chassis.
Compared with the prior art, the high-side switch module comprises a high-side switch module, a switch, a first detection module, a power supply switch module and a low-side switch module, wherein one end of the high-side switch module is coupled with a first power supply, the other end of the high-side switch module is coupled with the switch, and a power supply output end of the power supply switch module is coupled with the first detection module and is used for supplying power to the first detection module. The driving end of the low-side switch module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for driving the switch; and the first detection module is coupled with one end of the switch, which is far away from the high-side switch module, and is used for detecting the working voltage value of the switch. Therefore, the diagnosis function of the electrical faults of the switch can be realized by arranging a circuit at the periphery of the low-side switch module, and the product cost is greatly reduced.
The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures.
In the drawings:
fig. 1 is a schematic diagram of module connection of a switch detection device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a switch detecting device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of another switch detecting device according to an embodiment of the present utility model;
reference numerals: 1. a high side switch module; 2. a switch; 3. a first detection module; 301. a first resistor; 302. a second resistor; 303. a third resistor; 4. a power supply switch module; 401. a fourth resistor; 402. a fifth resistor; 403. a sixth resistor; 404. a seventh resistor; 405. a first triode; 406. a second triode; 5. a low side switch module; 6. driving a diode; 7. a first capacitor; 8. a second capacitor; 9. an electrostatic protection diode; 10. a microcontroller; 11. and a voltage detection module.
Detailed Description
Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
Referring to fig. 1, an embodiment of the present utility model provides a switch detection device, which may include a high-side switch module 1, a switch 2, a first detection module 3, a power supply switch module 4, and a low-side switch module 5, wherein the switch 2 may include, but is not limited to, an electronic control switch of an air spring switch valve, an electronic control switch of a compressor isolation valve, and the like.
One end of the high-side switch module 1 is coupled with a first power supply v1, the other end of the high-side switch module is coupled with the switch 2, and a power supply output end of the power supply switch module 4 is coupled with the first detection module 3 and is used for supplying power to the first detection module 3. The driving end of the low-side switch module 5 is coupled to an end of the switch 2 remote from the high-side switch module 1, for driving the switch 2. And, the first detection module 3 is coupled with one end of the switch 2 away from the high-side switch module 1, and is used for detecting the working voltage value of the switch 2. The high side switch module 1 and the low side switch module 5 may be driving circuits for driving and controlling the switch 2. The working state of the switch 2 can be determined according to the detected working voltage value, and the working state can comprise a normal state and a fault state, wherein the fault state can comprise a plurality of states such as short circuit to a power supply, short circuit to ground, open load and the like. Therefore, the diagnosis function of the electrical faults of the switch can be realized by arranging a circuit on the periphery of the low-side switch module 5, and the product cost is greatly reduced.
In an alternative embodiment of the utility model, referring to fig. 2 and 3, the first detection module 3 includes a first resistor 301, a second resistor 302, and a third resistor 303 connected in series in sequence. The first resistor 301 is coupled to a power supply output of the power supply switch module 4. The power supply switch module 4 is configured to supply power to the first detection module 3. The first resistor 301, the second resistor 302 and the switch 2 are coupled to form a voltage division node a, the third resistor 303 is connected in series with the second resistor 302 and then grounded, and the coupling position of the second resistor 302 and the third resistor 303 is used as a first detection node b. The driving end of the low-side switch module 5 is coupled with the voltage dividing node a, and the power supply input end of the power supply switch module 4 serves as a second detection node c. The driving end of the low-side switch module 5 is coupled with the voltage division node a, and the grounding end of the low-side switch module 5 is grounded. And determining the working voltage value of the switch 2 through the detection voltage values of the first detection node b and the second detection node c. The operating voltage value of the switch 2 may include a normal state and a fault state, wherein the fault state may include various states such as a short to power, a short to ground, and an open load.
In the process of detecting the switch 2, the high-side switch module 1, the power supply switch module 4 and the low-side switch module 5 are adjusted to be in an off state. The voltage value of the first detection node b is detected as Vd, and the voltage value of the second detection node c is detected as Vb.
If vd=vb×r2/(r1+r2), determining that the switch 2 is in a fault state of shorting to the power supply, where R1 refers to the resistance value of the second resistor 302; r2 refers to the resistance value of the third resistor 303.
If vd=0v, the power supply switch module 4 is adjusted to be in a conductive state, and the voltage value Vd of the first detection node b is re-detected, and the voltage value Vb of the second detection node c is detected. The detection results are as follows:
if vd=0v, determining that the switch 2 is in a fault state of short-circuiting to ground; if vd=vb×r2/(r1+r2+r3), the power supply switch module 4 is adjusted to be in an off state, and the high-side switch module 1 is adjusted to be in an on state, the voltage value Vd of the first detection node b is re-detected, and the voltage value Vb of the second detection node c is detected. Wherein, R3 refers to the resistance value of the first resistor 301, and the detection result is as follows:
if vd=0v, determining that the switch 2 is in a fault state with open load; if vd=vb×r2/(r1+r2), the switch 2 is considered to be connected normally, and no electrical fault exists. Thereby adjusting the low-side switch module 5 to be in a conducting state so that the switch 2 enters a normal operating voltage value.
The switch detection device adopts the design of discrete devices, realizes the diagnosis function of the electrical fault of the electric control switch 2 in the chassis domain with lower cost, improves the safety of an automobile chassis system, and has the advantages of wide applicability, low hardware cost, easy realization and the like. The cost is reduced and the efficiency is improved for the clients, and meanwhile, the differentiated requirements of different clients can be well met.
In an alternative embodiment of the utility model, referring to fig. 2 and 3, the power switch module 4 may include a fourth resistor 401, a fifth resistor 402, a sixth resistor 403, a seventh resistor 404, a first triode 405, and a second triode 406. One end of the fifth resistor 402 is coupled to one end of the fourth resistor 401, the other end is coupled to the emitter of the first triode 405 and then grounded, one end of the fourth resistor 401 is coupled to the base of the first triode 405, one end of the sixth resistor 403 is coupled to the collector of the first triode 405, and the other end is coupled to one end of the seventh resistor 404 and the base of the second triode 406. The emitter of the second triode 406, the other end of the seventh resistor 404, and the power supply input terminal of the second power supply v2 are coupled to form the second detection node c, where the collector of the second triode 406 is the power supply output terminal of the power supply switch module 4. Thus, when a low level is input to the other end of the fourth resistor 401, the first transistor 405 and the second transistor 406 are both in the off state, and the power supply switch module 4 is in the off state. When a high level is input to the other end of the fourth resistor 401, the first transistor 405 and the second transistor 406 are both in a conductive state, and the power supply switch module 4 is in a conductive state, and can supply power to the first detection module 3 through the second power supply v 2.
In an alternative embodiment of the utility model, a driving diode 6 is further connected in series between the driving end of the low-side switch module 5 and the voltage dividing node a, and an anode of the driving diode 6 is coupled to the voltage dividing node a. The negative electrode of the driving diode 6 is coupled to the driving end of the low-side switch module 5, so as to provide reverse connection protection for the low-side switch module 5. In one example, the low-side switch module 5 may be a packaged low-side driver chip.
In an alternative embodiment of the utility model, referring to fig. 2, the circuit further includes a first capacitor 7, where the first capacitor 7 is connected in parallel with the third resistor 303, and the first capacitor 7 is used for voltage stabilizing filtering, so as to improve stability of detecting the working voltage value of the first detection node b and reduce a voltage detection error.
In an alternative embodiment of the utility model, the circuit further includes a second capacitor 8 and an electrostatic protection diode 9, where one end of the second capacitor 8 and a negative electrode of the electrostatic protection diode 9 are respectively coupled to the voltage division node a, and the other end of the second capacitor 8 and an positive electrode of the electrostatic protection diode 9 are respectively grounded. Thus, the second capacitor 8 and the electrostatic protection diode 9 form an electrostatic discharge protection circuit (ESD) for protecting the switch detection device.
In an alternative embodiment of the utility model, the circuit further comprises a microcontroller 10, the microcontroller 10 comprising a first detection input, a second detection input, a power supply control output and a low side control output. The first detection input terminal is coupled to the first detection node b, the second detection input terminal is coupled to the second detection node c, and the power supply control output terminal is coupled to the other end of the fourth resistor 401, so as to adjust the operating voltage values of the first triode 405 and the second triode 406. And the low-side control output terminal is coupled with the enabling terminal of the low-side switch module 5 and is used for adjusting the working voltage value of the low-side switch module 5. Therefore, the microcontroller 10 can adjust the level input to the other end of the fourth resistor 401, and the microcontroller 10 can adjust the level of the enabling end of the bottom side switch module, so as to finish detecting the voltage of the first detection node b and the second detection node c, and simultaneously control the turn-off or turn-on of the high side switch module 1 to diagnose the electrical fault of the switch 2.
In an alternative embodiment of the utility model, as shown in fig. 1 and 2, a voltage detection module 11 is further coupled between the second detection input terminal and the emitter of the second transistor 406, and the voltage detection module 11 may be a voltage detection circuit for monitoring the second power v2 connected to the emitter of the second transistor 406 (may also be referred to as the second detection node c).
In one example, considering that there is a conduction voltage drop of a diode, a triode, etc. and the influence of the accuracy of resistance and capacitance, when calculating the proportional relation between Vd and Vb, an error within a certain range is allowed, for example, the error range may be within 5%. For the 0V level, a certain range of errors may also be allowed, e.g. the error range may be + -0.3V.
In summary, the embodiment of the utility model discloses a switch detection device, which comprises a high-side switch module 1, a switch 2, a first detection module 3, a power supply switch module 4 and a low-side switch module 5, wherein one end of the high-side switch module 1 is coupled with a first power v1, the other end is coupled with the switch 2, and a power supply output end of the power supply switch module 4 is coupled with the first detection module 3 for supplying power to the first detection module 3. The driving end of the low-side switch module 5 is coupled to an end of the switch 2 remote from the high-side switch module 1, for driving the switch 2. And, the first detection module 3 is coupled with one end of the switch 2 away from the high-side switch module 1, and is used for detecting the working voltage value of the switch 2. Therefore, the diagnosis function of the electrical fault of the switch 2 can be realized by arranging a circuit at the periphery of the low-side switch module 5, and the product cost is greatly reduced.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
As will be readily appreciated by those skilled in the art: any combination of the above embodiments is possible, and thus is an embodiment of the present utility model, but the present specification is not limited by the text.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Claims (11)
1. The utility model provides a switch detection device, its characterized in that, the device includes high limit switch module (1), switch (2), first detection module (3), power supply switch module (4) and low limit switch module (5), wherein:
one end of the high-side switch module (1) is coupled with a first power supply, the other end of the high-side switch module is coupled with the switch (2), and a power supply output end of the power supply switch module (4) is coupled with the first detection module (3) and is used for supplying power to the first detection module (3);
the driving end of the low-side switch module (5) is coupled with one end of the switch (2) away from the high-side switch module (1) and is used for driving the switch (2); and, in addition, the processing unit,
the first detection module (3) is coupled with one end of the switch (2) away from the high-side switch module (1) and is used for detecting the working voltage value of the switch (2).
2. The switch detection device according to claim 1, wherein the first detection module (3) comprises a first resistor (301), a second resistor (302) and a third resistor (303) connected in series in sequence;
the first resistor (301) is coupled with a power supply output end of the power supply switch module (4), the first resistor (301), the second resistor (302) and the switch (2) are coupled to form a voltage division node, the third resistor (303) is connected with the second resistor (302) in series and then grounded, and a driving end of the low-side switch module (5) is coupled with the voltage division node.
3. The switch detection device according to claim 2, wherein the power supply switch module (4) comprises a fourth resistor (401), a fifth resistor (402), a sixth resistor (403), a seventh resistor (404), a first triode (405) and a second triode (406);
one end of the fifth resistor (402) is coupled with one end of the fourth resistor (401), the other end of the fifth resistor is coupled with the emitter of the first triode (405) and then grounded, one end of the fourth resistor (401) is coupled with the base electrode of the first triode (405), one end of the sixth resistor (403) is coupled with the collector electrode of the first triode (405), and the other end of the sixth resistor is coupled with one end of the seventh resistor (404) and the base electrode of the second triode (406);
the emitter of the second triode (406) and the other end of the seventh resistor (404) are respectively coupled with a power supply input end of a second power supply, and the collector of the second triode (406) is used as a power supply output end and is coupled with the first resistor (301).
4. The switch detection device according to claim 2, wherein a driving diode (6) is further connected in series between the driving end of the low-side switch module (5) and the voltage dividing node, and an anode of the driving diode (6) is coupled to the voltage dividing node.
5. The switch detection device according to claim 1, characterized in that the device further comprises a first capacitance (7), the first capacitance (7) being connected in parallel with a third resistance (303).
6. The switch detection device according to claim 2, further comprising a second capacitor (8) and an electrostatic protection diode (9), wherein one end of the second capacitor (8) and a negative electrode of the electrostatic protection diode (9) are respectively coupled to the voltage dividing node, and the other end of the second capacitor (8) and a positive electrode of the electrostatic protection diode (9) are respectively grounded.
7. A switch detection device according to claim 3, characterized in that the device further comprises a microcontroller (10), the microcontroller (10) comprising a first detection input, a second detection input, a supply control output and a low side control output; wherein,
the first detection input end is coupled between the second resistor (302) and the third resistor (303), the second detection input end is coupled with the power supply input end of the power supply switch module (4), and the power supply control output end is coupled with the other end of the fourth resistor (401) and used for adjusting the working voltage values of the first triode (405) and the second triode (406); the method comprises the steps of,
the low-side control output end is coupled with the enabling end of the low-side switch module (5) and used for adjusting the working voltage value of the low-side switch module (5).
8. The switch detection device of claim 7, wherein a voltage detection module (11) is further coupled between the second detection input and the emitter of the second transistor (406).
9. A domain controller, characterized in that the domain controller comprises a switch detection device according to any of claims 1-8.
10. An automotive chassis comprising the domain controller of claim 9.
11. An automobile comprising the automobile chassis of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320865049.8U CN219997252U (en) | 2023-04-18 | 2023-04-18 | Switch detection device, domain controller, automobile chassis and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320865049.8U CN219997252U (en) | 2023-04-18 | 2023-04-18 | Switch detection device, domain controller, automobile chassis and automobile |
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| CN219997252U true CN219997252U (en) | 2023-11-10 |
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| CN202320865049.8U Active CN219997252U (en) | 2023-04-18 | 2023-04-18 | Switch detection device, domain controller, automobile chassis and automobile |
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| CN (1) | CN219997252U (en) |
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