CN118810653A - Electronic control unit power distribution circuit and vehicle controller - Google Patents
Electronic control unit power distribution circuit and vehicle controller Download PDFInfo
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- CN118810653A CN118810653A CN202410878057.5A CN202410878057A CN118810653A CN 118810653 A CN118810653 A CN 118810653A CN 202410878057 A CN202410878057 A CN 202410878057A CN 118810653 A CN118810653 A CN 118810653A
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- 238000005070 sampling Methods 0.000 claims description 19
- 238000003745 diagnosis Methods 0.000 description 7
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- 238000012544 monitoring process Methods 0.000 description 3
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Abstract
The invention discloses an electronic control unit power distribution circuit and a vehicle controller, and relates to the field of electric automobiles. The invention comprises a first power distribution module, at least two external electronic control units and a first power distribution module, wherein the first power distribution module is used for supplying power to the electronic control units at the same time; the at least two second power distribution modules are respectively connected with an electronic control unit, and each second power distribution module is used for supplying power to the corresponding electronic control unit; the power supply module is connected with the first power distribution module and the second power distribution module respectively and is used for supplying power to the first power distribution module and the second power supply module; the control module is respectively connected with the first power distribution module and the second power distribution module; the control module is used for controlling the first power distribution module to supply power to each electronic control unit in a sleep mode and controlling the second power distribution module to sleep; the electronic control unit is also used for controlling the second power distribution module to supply power to the electronic control unit in the normal mode and controlling the first power distribution module to sleep, so that the problem of high power consumption of the existing electronic fuse power distribution scheme under sleep is solved.
Description
Technical Field
The invention belongs to the field of electric automobiles, and particularly relates to an electronic control unit power distribution circuit and a vehicle controller.
Background
With the continuous advancement of automotive electronics, electronic fuses (eFUSEs) are becoming key components in the intelligent power architecture of automobiles. Compared with the traditional mechanical fuse, the electronic fuse not only realizes stable power supply and fault protection of an ECU (electronic control unit) in normal working and dormant states, but also has the advantages of rapid fault response capability and self-recovery property. In the development of area controllers (ZCU), functional domain controllers, and the like, the power requirements of eFUSEs are becoming increasingly significant. For example, in an entire vehicle architecture of an OEM (original equipment manufacturer), one regional controller would need to integrate up to twenty multiple electronic control units to supply power. If a one-to-one eFUSE power supply scheme is adopted, the production cost is high, and the power consumption of the power distribution circuit is high during dormancy.
Therefore, it is necessary to design a low-cost and low-power consumption electronic control unit power distribution circuit.
Disclosure of Invention
The invention aims to provide an electronic control unit power distribution circuit and a vehicle controller, which are used for solving the problem of high power consumption of a one-to-one eFUSE power distribution scheme in the prior art.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides an electronic control unit power distribution circuit, which comprises:
The first power distribution module is externally connected with at least two electronic control units and is used for simultaneously supplying power to the electronic control units, and the first power distribution module comprises an electronic fuse module;
the at least two second power distribution modules are respectively connected with one electronic control unit, and each second power distribution module is used for supplying power to the corresponding electronic control unit;
the power supply module is connected with the first power distribution module and the second power distribution module respectively and is used for supplying power to the first power distribution module and the second power distribution module;
the control module is respectively connected with the first power distribution module and the second power distribution module;
the control module is used for controlling the first power distribution module to supply power to each electronic control unit in a sleep mode and controlling the second power distribution module to sleep; and the second power distribution module is also used for controlling the second power distribution module to supply power to the electronic control unit in a normal mode, and controlling the first power distribution module to sleep.
In one embodiment of the present invention, in the sleep mode, the first power distribution module is further configured to collect a total operating current of all the electronic control units, and perform overcurrent or short-circuit fault diagnosis according to the total operating current; generating a fault status signal when an overcurrent or short-circuit fault occurs;
And the control module controls the first power distribution module to sleep according to the fault state signal, and controls the second power distribution module connected with the electronic control unit without overcurrent or short circuit fault to supply power to the electronic control unit without overcurrent or short circuit fault.
In one embodiment of the present invention, the control module controls the first power distribution module to sleep according to the fault status signal, controls the second power distribution module connected to the electronic control unit without the overcurrent or short-circuit fault to supply power to the electronic control unit without the overcurrent or short-circuit fault, and includes:
The control module generates a first enabling signal according to the fault state signal and sends the first enabling signal to each second power distribution module so that each second power distribution module supplies power for the corresponding electronic control unit;
collecting working current of each electronic control unit through each second power distribution module;
And determining the electronic control unit with overcurrent or short-circuit faults according to the working current of each electronic control unit, and stopping outputting the first enabling signal to the second power distribution module connected with the electronic control unit with the overcurrent or short-circuit faults.
In one embodiment of the invention, the power distribution system further comprises a first diode, wherein the positive electrode of the first diode is connected with the fault signal output end of the first power distribution module, and the negative electrode of the first diode is connected with the enabling end of the second power distribution module;
after the first power distribution module generates a fault state signal, the fault state signal is used as a second enabling signal to be transmitted to an enabling end of each second power distribution module through the first diode, so that each second power distribution module supplies power for the corresponding electronic control unit.
In one embodiment of the invention, the power supply further comprises a second diode, wherein the positive electrode of the second diode is connected with the control signal output end of the control module, and the negative electrode of the second diode is respectively connected with the negative electrode of the first diode and the enabling end of the second power distribution module;
For preventing the fault status signal from flowing to the control module after passing through the first diode.
In one embodiment of the invention, the first power distribution module comprises an electronic fuse chip, a sampling resistor and a power switching device;
One end of the sampling resistor is connected with the power module, and the other end of the sampling resistor is connected with the input end of the power device;
the output end of the power device is connected with the power supply end of each electronic control unit, and the control end of the power device is connected with the electronic fuse chip;
The electronic fuse chip is connected with two ends of the sampling resistor and used for controlling the on-off of the power device; the system is also used for collecting voltages at two ends of the sampling resistor, calculating total working current of all the electronic control units according to the voltages, and diagnosing overcurrent or short-circuit faults according to the total working current; when an overcurrent or short-circuit fault occurs, a fault status signal is generated.
In one embodiment of the present invention, a third diode is disposed between the first power distribution module and each of the electronic control units, and an anode of the third diode is connected to the first power distribution module, and a cathode of the third diode is connected to a power supply end of the corresponding electronic control unit.
In one embodiment of the invention, the first power distribution module comprises a discrete integrated circuit with a power supply function, or an integrated chip integrating a current sampling and output power supply function.
In one embodiment of the invention, the second power distribution module comprises an HSD chip or a discrete integrated circuit with high level output capability.
To achieve the object of the present application and other related objects, the present application also provides a vehicle controller including the electronic control unit power distribution circuit as described in any one of the above.
According to the electronic control unit power distribution circuit, two power distribution modules are arranged, a single first power distribution module with the electronic fuse module is used for simultaneously distributing power to a plurality of electronic control units in the sleep mode, and a plurality of second power distribution modules are used for respectively distributing power to the electronic control units in the normal mode.
According to the electronic control unit power distribution circuit, the first power distribution module is used for carrying out overcurrent or short-circuit fault diagnosis in the sleep mode, and generating the fault state signal to wake up the control module when the overcurrent or short-circuit fault occurs, the control module controls the second power distribution modules to respectively supply power to the corresponding electronic control units, the control module collects working current of each electronic control unit according to the second power distribution modules to determine the electronic control unit with the overcurrent or short-circuit fault, and stops supplying power to the electronic control unit with the overcurrent or short-circuit fault, so that fault monitoring and fault protection of the electronic control units are realized, and reliability and stability of the circuit are improved.
According to the electronic control unit power distribution circuit, in the time period from when the control module is awakened by the fault state signal to when each second power distribution module receives the enabling signal sent by the control module, the fault state signal is used as the enabling signal to control each second power distribution module to supply power for the corresponding electronic control unit, so that the phenomenon that the electronic control unit is powered off when the power distribution modules are switched is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a circuit schematic diagram of a one-to-one eFUSE power distribution scheme of the prior art.
Fig. 2 is a schematic diagram of a circuit module according to an exemplary embodiment of the application.
Fig. 3 is a schematic circuit diagram of an exemplary embodiment of the present application.
Fig. 4 is a schematic circuit diagram of an embodiment of the present application.
Reference numerals illustrate: 10. a power module; 20. a control module; 30. a first power distribution module; 40. a second power distribution module; 50. an electronic control unit; 21. a microcontroller; 31. an electronic fuse module; 311. eFUSE chips; 312. sampling a resistor; 313. a power device; 41. an HSD module; 42. HSD chip.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, in the prior art, a one-to-one eFUSE power distribution scheme is adopted for powering the electronic control units, and an electronic fuse module is required to be arranged for a power distribution circuit of each electronic control unit, however, the manufacturing cost of the electronic fuse module is high, and the power consumption is high due to the fact that the power consumption is required for the operation of each electronic fuse module in the sleep mode in the power distribution scheme.
It should be noted that eFUSEs typically detect current by measuring the voltage across a known sampling resistor and then shut off the current by controlling a power switching device when the current exceeds a design limit.
In order to solve the problem of high power consumption and high power distribution cost of a multi-path ECU (electronic control unit) in the prior art, the present invention provides an electronic control unit power distribution circuit, and these embodiments will be discussed in detail below.
Referring to fig. 2, in an exemplary embodiment of the present application, the electronic control unit power distribution circuit includes: a power module 10, a control module 20, a first power distribution module 30, and at least two second power distribution modules 40. The power module 10 is connected with the first power distribution module 30 and the second power distribution module 40 respectively, and is used for supplying power to the first power distribution module 30 and the second power distribution module 40; the first power distribution module 30 is externally connected with at least two electronic control units 50, and is used for simultaneously supplying power to the electronic control units 50; each of the second power distribution modules 40 is connected to one of the electronic control units 50, and is configured to supply power to the electronic control unit 50 connected to the second power distribution module 40; the control module 20 is respectively connected with the first power distribution module 30 and the second power distribution module 40, and is configured to control the first power distribution module 30 to supply power to each electronic control unit 50 in a sleep mode, and control the second power distribution module 40 to sleep; the control module 20 is further configured to control the second power distribution module 40 to supply power to the electronic control unit 50 in the normal mode, and control the first power distribution module 30 to sleep. Because the single first power distribution module with the electronic fuse module is adopted to distribute power for a plurality of electronic control units in the sleep mode, the power consumption of the power distribution circuit in the sleep mode can be reduced.
Specifically, the input end of the first power distribution module 30 is connected to the output end of the power module 10, the output end is connected to the power supply ends of the plurality of electronic control units 50, and the enable end is connected to the control module 20. In the sleep mode, the control module 20 controls the first power distribution module 30 to distribute power to the electronic control units 50, and at the same time, the first power distribution module 30 collects a total working current of each electronic control unit 50 under sleep, and performs overcurrent or short-circuit fault diagnosis according to the total working current. When at least one of the electronic control units 50 experiences an overcurrent or short-circuit fault, the total operating current increases, and when the total operating current increases to exceed a first current threshold, the first power distribution module 30 generates a fault status signal, so that the control module 20 controls the first power distribution module to sleep according to the fault status signal, and controls the second power distribution module connected with the electronic control unit without the overcurrent or short-circuit fault to supply power to the electronic control unit without the overcurrent or short-circuit fault. The first current threshold is set according to the total operating current when all the electronic control units 50 are dormant, for example, 120% or 150% of the total operating current when dormant.
Referring to fig. 3, in an exemplary embodiment of the present application, the first power distribution module 30 includes an electronic fuse module 31, an input end of the electronic fuse module 31 is connected to an output end of the power module 10, the output end is simultaneously connected to power supply ends of the plurality of electronic control units 50, an enable end of the electronic fuse module 31 is connected to the microcontroller 21, and the plurality of electronic control units 50 can be simultaneously powered according to a control signal of the microcontroller 21.
It should be understood that the method of diagnosing the overcurrent or short-circuit fault of the first power distribution module 30 may also be to obtain the total operating power of all the electronic control units 50 according to the total operating current. And compares the magnitude of the total operating power to a power threshold, the first power distribution module 30 generating a fault status signal when the total operating power exceeds the power threshold. Wherein the power threshold is set according to the total operating power of all the electronic control units 50 when they are operating normally, for example, to 120% or 150% of the total operating power when they are operating normally. In addition, the first power distribution module 30 may also send the total operating current to the control module 20 to facilitate other logic processing by the control module 20.
In an exemplary embodiment of the present application, the second power distribution modules 40 include at least two power distribution modules 40, wherein an input terminal of each second power distribution module 40 is connected to an output terminal of the power supply module 10, an enable terminal is connected to the control module 20, and an output terminal of each second power distribution module 40 is connected to a power supply terminal of one of the electronic control units 50. In the normal mode, each of the second power distribution modules 40 supplies power to one of the electronic control units 50 connected thereto, and collects an operating current of the electronic control unit 50. Of course, in other embodiments, the second power distribution modules 40 may be three or more, and each of the second power distribution modules 40 is connected to one of the electronic control units 50, so as to implement one-to-one power distribution for the electronic control units 50 by the control module 20 through the second power distribution modules 40.
Referring to fig. 3, in an exemplary embodiment of the present application, the second power distribution module 40 includes an HSD (high side driving) module 41, an input terminal of the HSD module 41 is connected to an output terminal of the power module 10, an output terminal of the HSD module is connected to one of the electronic control units 50, an enable terminal of the HSD module is connected to the microcontroller 21, and the electronic control unit 50 connected thereto is powered according to a control signal of the microcontroller 21. Since the HSD module 41 has a lower cost than the electronic fuse module, the manufacturing cost can be effectively reduced when the second power distribution module 40 is constructed by using the HSD module.
In the sleep mode, the control module 20 may be in a low power sleep state, in which most of the circuits in the control module stop working, and only the first power distribution module 30 is kept outputting the enable signal to keep the first power distribution module 30 distributing power to each of the electronic control units 50. At this time, the second power distribution module 40 is in a sleep state.
In an exemplary embodiment of the present application, the control module 20 includes a Microcontroller (MCU) 21, and when the control module 20 receives a fault status signal transmitted from the first power distribution module 30, the control module 20 generates a first enable signal according to the fault status signal and transmits the first enable signal to each of the second power distribution modules 40, so that each of the second power distribution modules supplies power to the corresponding electronic control unit 50; collecting an operating current of each of the electronic control units 50 through each of the second power distribution modules 40; the electronic control unit 50 having the overcurrent or short-circuit fault is determined according to the operation current of each of the electronic control units 50, and the output of the first enable signal to the second power distribution module 40 connected to the electronic control unit 50 having the overcurrent or short-circuit fault is stopped.
Specifically, the control module 20 is awakened after receiving the fault status signal, and the control module 20 controls each of the second power distribution modules 40 to supply power to the corresponding electronic control unit 50, and closes the first power distribution module 30, so that the electronic control unit power distribution circuit works in a normal mode. Next, the control module 20 may collect the working current of each electronic control unit 50 through each second power distribution module 40, and since the current flowing through the faulty electronic control unit 50 may increase, the control module 20 may perform an overcurrent or short-circuit fault diagnosis by comparing the working current of each electronic control unit 50 with the corresponding second current threshold, and when the working current of a certain electronic control unit 50 is greater than the corresponding second current threshold, it indicates that the overcurrent or short-circuit fault occurs in the electronic control unit 50, where the second current threshold is set according to the working current of each electronic control unit 50 during normal operation, for example, set to 120% or 150% of the working current of each electronic control unit 50 during normal operation. Finally, the control module 20 controls the second power distribution module 40 connected to the electronic control unit 50 having the overcurrent or short-circuit fault to be turned off, and stops supplying power to the electronic control unit 50 having the fault, so as to implement fault monitoring and fault protection in the normal mode.
Since the first power distribution module 30 is turned off and the second power distribution module 40 is not operated during the period from when the microcontroller 21 is awakened by the fault state signal to when each of the second power distribution modules 40 receives the first enable signal transmitted from the control module 20, the electronic control unit 50 is powered off. In order to avoid the power failure of the electronic control unit 50 caused by the above situation, the present application further provides a pre-start circuit, where the pre-start circuit obtains a temporary second enable signal through the fault status signal output by the first power distribution module 30, and sends the enable signal to the enable end of the second power distribution module 40, so as to enable each second power distribution module 40 to supply power to the corresponding electronic control unit 50 during a period from when the microcontroller 21 is awakened by the fault status signal to when each second power distribution module 40 receives the first enable signal sent by the control module 20.
Referring to fig. 4, in an embodiment of the present application, the control module 20 includes a Microcontroller (MCU) 21, the first power distribution module 30 includes an electronic fuse module 31, the second power distribution module 40 includes two HSD modules 41, and the electronic control unit 50 includes two HSD modules.
Specifically, the electronic fuse module 31 includes an eFUSE chip 311, a sampling resistor 312 and a power device 313, where the eFUSE chip 311 is a 2ED2410 chip, and of course, in other embodiments, the electronic fuse module 31 may also use a VNF1048 chip or an integrated chip (such as a BTG7 XXXXXX series chip) with integrated current sampling and power supply functions, and may also use a discrete integrated circuit with power supply functions. The power device 313 is an NMOS transistor, and in other embodiments, other power switching devices may be used instead, such as PMOS, IGBT, siC, or the like.
In this embodiment, two HSD modules 41 are integrated into the same HSD chip 42, and the HSD chip 42 uses a BTS7200-2EPA chip, although in other embodiments, the HSD modules 41 may use other HSD chips or discrete integrated circuits with high level output capability. In this embodiment, the number of the electronic control units 50 includes two, however, in other embodiments, the number of the electronic control units 50 may be more, and the chip or the circuit adopted by the HSD module 41 may be adaptively adjusted according to the actual situation, so that each of the HSD modules 41 corresponds to one of the electronic control units 50, and supplies power to the corresponding electronic control unit 50.
Specifically, the input end of the eFUSE chip 311 is connected with the power module 10, the enabling end is connected with the microcontroller 21, one end of the sampling resistor 312 is connected with the power module 10, the other end is connected with the input end of the power device 313, the output ends of the power device 313 are respectively connected with one electronic control unit 50, the control end is connected with the eFUSE chip 311, and the eFUSE chip 311 is connected with two ends of the sampling resistor 312. The microcontroller 21 controls the eFUSE chip 311 to further control the on-off state of the power device 313 to realize the control of the power supply to the electronic control unit 50. The eFUSE chip 311 may also restore the total operating current of the electronic control unit 50 by capturing the voltage across the sampling resistor 312, and when the total operating current exceeds a first current threshold, the eFUSE chip 311 generates a fault status signal and generates a fault status signal to the microcontroller 21.
The HSD chip 42 has an input terminal connected to the power module 10, an enable terminal connected to the microcontroller 21, and two output terminals connected to one of the electronic control units 50. In the normal mode, the microcontroller 21 controls the HSD chip 42 to supply power to the electronic control units 50, collects the working current of each electronic control unit 50, and sends the working current of each electronic control unit 50 to the microcontroller 21, the microcontroller 21 performs overcurrent or short-circuit fault diagnosis according to the working current, and when the working current of one electronic control unit 50 is greater than the corresponding second current threshold, the microcontroller 21 controls the HSD chip 42 to close the power supply to the electronic control unit 50 with fault.
In the sleep mode, the microcontroller 21 controls the eFUSE chip 311 to supply power to the electronic control unit 50, and the fault signal output terminal of the 2ED2410 chip is output to be low level. When at least one of the electronic control units 50 has an overcurrent or short-circuit fault, i.e. the total operating current exceeds a current threshold, the eFUSE chip 311 generates a high-level fault state signal, which is sent to the microcontroller 21 from the fault signal output end, so as to wake up the microcontroller 21, and the microcontroller 21 switches the operating mode from the sleep mode to the normal mode, i.e. generates a first enable signal to control the HSD chip 42 to supply power to the electronic control unit 50, and simultaneously turns off the eFUSE chip 311.
In this embodiment, a pre-start circuit is further provided, where the pre-start circuit includes a first diode, and is configured to wake up the HSD chip 42 in advance to supply power to the electronic control unit. Specifically, the fault signal output terminal of the eFUSE chip 311 is further connected to the positive electrode of a first diode, and the negative electrode of the first diode is connected to the enable terminal of the HSD chip 42. When an overcurrent or short-circuit fault occurs, eFUSE chip 311 generates a high-level fault status signal and provides the high-level fault status signal to microcontroller 21, and the high-level fault status signal also flows to the enable terminal of HSD chip 42 through the first diode, and wakes up HSD chip 42 as a second enable signal, so that HSD chip 42 supplies power to electronic control unit 50. It should be noted that, the pre-starting of the second power distribution unit 40 by a diode is only an example in this embodiment, and in other embodiments, the same purpose can be achieved by other circuit structures.
In order to prevent the fault state signal sent by the first power distribution module 30 from flowing to the microcontroller 21 after passing through the first diode, the embodiment further provides a second diode, where an anode of the second diode is connected to the control signal output end of the microcontroller 21, and a cathode of the second diode is connected to the enable end of the HSD chip 42 and a cathode of the first diode. Of course, the second diode need not be provided when the output port of the microcontroller 21 has unidirectional output characteristics.
After the HSD chip 42 and the microcontroller 21 are awakened by the fault status signal, the microcontroller 21 controls the HSD chip 42 to continue to supply power to the electronic control unit 50 and turns off the eFUSE chip 311. The HSD chip 42 collects the working current of each electronic control unit 50, and sends the working current of each electronic control unit 50 to the microcontroller 21, the microcontroller 21 performs overcurrent or short-circuit fault diagnosis according to the working current, and when the working current of one electronic control unit 50 is greater than the corresponding current threshold value, the microcontroller 21 controls the HSD chip 42 to close the power supply to the faulty electronic control unit 50.
In this embodiment, a third diode is further disposed between the first power distribution module 30 and the electronic control unit 50. Specifically, the third diodes include a plurality of third diodes, and each of the third diodes has an anode connected to the output terminal of the power device 313 and a cathode connected to one of the electronic control units 50 to perform a reverse connection preventing function.
In summary, in the electronic control unit power distribution circuit of the present application, by providing the first power distribution module 30 and the second power distribution module 40, the first power distribution module 30 is used for power distribution in the sleep mode, and the second power distribution module 40 is used for power distribution in the normal mode, compared with the prior art, the power consumption in the sleep mode is reduced by reducing the number of electronic fuse modules, and meanwhile, the production cost is reduced. In addition, the first power distribution module 30 performs overcurrent or short-circuit fault diagnosis in the sleep mode, and generates a fault state signal to wake up the control module 20 and the second power distribution module 40 when the overcurrent or short-circuit fault occurs, the control module 20 and the second power distribution module 40 further judge the electronic control unit 50 with the fault, and power supply to the electronic control unit 50 is closed, so that fault monitoring and fault protection of the electronic control unit 50 are realized, and reliability and stability of a circuit are improved.
To achieve the objects of the application and related objects, the present application also provides a vehicle controller including any one of the above-described electronic control unit power distribution circuits.
The above description is only a preferred embodiment of the present application and the description of the technical principle applied, and it should be understood by those skilled in the art that the scope of the present application is not limited to the specific combination of the above technical features, but also encompasses other technical features formed by any combination of the above technical features or the equivalent thereof without departing from the inventive concept, for example, the technical features disclosed in the present application (but not limited to) are replaced with technical features having similar functions.
Other technical features besides those described in the specification are known to those skilled in the art, and are not described herein in detail to highlight the innovative features of the present invention.
Claims (10)
1. An electronic control unit power distribution circuit, comprising:
The first power distribution module is externally connected with at least two electronic control units and is used for simultaneously supplying power to the electronic control units, and the first power distribution module comprises an electronic fuse module;
the at least two second power distribution modules are respectively connected with one electronic control unit, and each second power distribution module is used for supplying power to the corresponding electronic control unit;
the power supply module is connected with the first power distribution module and the second power distribution module respectively and is used for supplying power to the first power distribution module and the second power distribution module;
the control module is respectively connected with the first power distribution module and the second power distribution module;
the control module is used for controlling the first power distribution module to supply power to each electronic control unit in a sleep mode and controlling the second power distribution module to sleep; and the second power distribution module is also used for controlling the second power distribution module to supply power to the electronic control unit in a normal mode, and controlling the first power distribution module to sleep.
2. The electronic control unit power distribution circuit of claim 1, wherein in sleep mode, the first power distribution module is further configured to collect a total operating current of all of the electronic control units, and to diagnose an overcurrent or short-circuit fault based on the total operating current; generating a fault status signal when an overcurrent or short-circuit fault occurs;
And the control module controls the first power distribution module to sleep according to the fault state signal, and controls the second power distribution module connected with the electronic control unit without overcurrent or short circuit fault to supply power to the electronic control unit without overcurrent or short circuit fault.
3. The electronic control unit power distribution circuit of claim 2, wherein the control module controlling the first power distribution module to sleep based on the fault status signal, controlling the second power distribution module connected to the electronic control unit that has not experienced an overcurrent or short-circuit fault to power the electronic control unit that has not experienced an overcurrent or short-circuit fault, comprises:
The control module generates a first enabling signal according to the fault state signal and sends the first enabling signal to each second power distribution module so that each second power distribution module supplies power for the corresponding electronic control unit;
collecting working current of each electronic control unit through each second power distribution module;
And determining the electronic control unit with overcurrent or short-circuit faults according to the working current of each electronic control unit, and stopping outputting the first enabling signal to the second power distribution module connected with the electronic control unit with the overcurrent or short-circuit faults.
4. The electronic control unit power distribution circuit of claim 3, further comprising a first diode, wherein an anode of the first diode is connected to a fault signal output of the first power distribution module, and a cathode of the first diode is connected to an enable terminal of the second power distribution module;
after the first power distribution module generates a fault state signal, the fault state signal is used as a second enabling signal to be transmitted to an enabling end of each second power distribution module through the first diode, so that each second power distribution module supplies power for the corresponding electronic control unit.
5. The electronic control unit power distribution circuit according to claim 4, further comprising a second diode, wherein an anode of the second diode is connected to the control signal output terminal of the control module, and a cathode of the second diode is connected to the cathode of the first diode and an enable terminal of the second power distribution module, respectively;
For preventing the fault status signal from flowing to the control module after passing through the first diode.
6. The electronic control unit power distribution circuit of claim 2, wherein the first power distribution module comprises an electronic fuse chip, a sampling resistor, and a power switching device;
One end of the sampling resistor is connected with the power module, and the other end of the sampling resistor is connected with the input end of the power device;
the output end of the power device is connected with the power supply end of each electronic control unit, and the control end of the power device is connected with the electronic fuse chip;
The electronic fuse chip is connected with two ends of the sampling resistor and used for controlling the on-off of the power device; the system is also used for collecting voltages at two ends of the sampling resistor, calculating total working current of all the electronic control units according to the voltages, and diagnosing overcurrent or short-circuit faults according to the total working current; when an overcurrent or short-circuit fault occurs, a fault status signal is generated.
7. The electronic control unit power distribution circuit according to claim 1, wherein a third diode is arranged between the first power distribution module and each electronic control unit, the anode of the third diode is connected with the first power distribution module, and the cathode of the third diode is connected with the power supply end of the corresponding electronic control unit.
8. The electronic control unit power distribution circuit of claim 1, wherein the first power distribution module comprises a discrete integrated circuit with power supply functionality or an integrated chip integrating current sampling and output power supply functionality.
9. The electronic control unit power distribution circuit of claim 1, wherein the second power distribution module comprises an HSD chip or a discrete integrated circuit with high level output capability.
10. A vehicle controller, characterized in that it comprises an electronic control unit power distribution circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410878057.5A CN118810653A (en) | 2024-07-02 | 2024-07-02 | Electronic control unit power distribution circuit and vehicle controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410878057.5A CN118810653A (en) | 2024-07-02 | 2024-07-02 | Electronic control unit power distribution circuit and vehicle controller |
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| CN118810653A true CN118810653A (en) | 2024-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410878057.5A Pending CN118810653A (en) | 2024-07-02 | 2024-07-02 | Electronic control unit power distribution circuit and vehicle controller |
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| Country | Link |
|---|---|
| CN (1) | CN118810653A (en) |
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