A power distribution device and vehicle

Abstract

The application relates to a power distribution device and a vehicle, comprising an MCU, an Efuse chip and a multi-channel high-side drive module; the MCU is used for responding to vehicle power-on, controlling a plurality of drive channels of the multi-channel high-side drive module to output drive voltages to a plurality of ECUs for normal power distribution, and controlling the Efuse chip to close the output of the drive voltage; the MCU is also used for responding to vehicle hibernation, controlling the Efuse chip to output the drive voltage to the plurality of ECUs for low-power consumption power distribution, and controlling a plurality of drive channels of the multi-channel high-side drive module to close the output of the drive voltage, so that the technical problem that the current ECU normal power distribution scheme in the industry adopts the Efuse chip for one-to-one power distribution, and the cost and complexity are high can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a power distribution device and a vehicle. BACKGROUND

[0002] With the continuous upgrading of the automobile electronic and electrical architecture, the traditional distributed electronic and electrical architecture is gradually transformed into a new generation of regional architecture. In the new regional architecture, more automobile electronic control units need to implement regional intelligent power distribution functions. Intelligent power distribution needs to implement current detection, I2T curve protection algorithm and other functions to replace the traditional physical fuse function. Among them, part of the automobile electronic control unit (ECU for short) not only needs to be powered after the vehicle starts, but also needs to be powered after the vehicle sleeps. This power distribution method is called constant power distribution.

[0003] At present, the ECU constant power distribution scheme in the industry adopts Efuse chips for one-to-one power distribution, as shown in Figure 1 Efuse chips are currently new products in the industry, and the cost of single chips and peripheral circuits is high, and the replaceability is poor. In addition, Efuse chips do not have a power-on precharge function, which will cause a charging overcurrent at the moment of power-on, resulting in power-off. Therefore, a precharge circuit needs to be designed separately. In summary, the Efuse chip one-to-one power distribution scheme not only has high cost, but also has high design complexity. SUMMARY

[0004] The purpose of the present application is to provide a power distribution device and a vehicle to solve the technical problem of high cost and complexity of the ECU constant power distribution scheme in the industry using Efuse chips for one-to-one power distribution.

[0005] To achieve the above purpose, the embodiment of the present application provides a power distribution device, which comprises an MCU, an Efuse chip and a multi-channel high-side drive module.

[0006] The input pin of the Efuse chip is connected with the MCU, for receiving the control signal of the MCU; the output pin of the Efuse chip is connected with a plurality of ECUs, for outputting a drive voltage to the ECUs.

[0007] The multi-channel high-side drive module comprises a plurality of drive channels corresponding to the plurality of ECUs one by one.

[0008] The input pin of each drive channel is connected with the MCU, for receiving the control signal of the MCU.

[0009] The output pin of each drive channel is connected with a corresponding ECU, for outputting a drive voltage to the ECU.

[0010] The MCU is configured to control the multiple drive channels to output drive voltages to normally power the multiple ECUs and control the Efuse chip to stop outputting drive voltages in response to the whole vehicle being powered on.

[0011] The MCU is further configured to control the Efuse chip to output drive voltages to low-power power the multiple ECUs and control the multiple drive channels to stop outputting drive voltages in response to the whole vehicle being in sleep.

[0012] The power distribution device has the following advantages:

[0013] When there are at least two small-current (current less than 5A) always-on ECUs in the area controller, one Efuse chip and one multi-channel high-side drive module are used to combine power distribution. The multi-channel high-side drive module is used to normally power the at least two small-current always-on ECUs when the whole vehicle is powered on, and the Efuse chip is used to low-power the at least two small-current always-on ECUs after the whole vehicle is in sleep. Compared with the one-to-one power distribution scheme using the Efuse chip, the combined power distribution of the present application only needs to use one Efuse chip, reduces the use of the Efuse chip, and the high-side drive chip has strong impact current resistance and does not need a power-on pre-charging circuit and will not have an overcurrent shutdown problem. Therefore, it is not necessary to separately increase the power-on pre-charging circuit, and the high-side drive chip has a low cost. In summary, the power distribution device has a simple structure design and can greatly reduce the cost of the power distribution device.

[0014] The present application also provides a vehicle comprising the power distribution device.

[0015] The details and advantages of the present application not described in detail are described in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A structural diagram of a power distribution device mentioned in the background.

[0018] Figure 2 A structural diagram of a power distribution device in an embodiment of the present application.

[0019] Figure 3 A structural diagram of a power distribution device in a specific embodiment of the present application.

[0020] Figure 4 For Figure 3 The flow chart of the normal power distribution mode of the power distribution device after the power-up operation.

[0021] Figure 5 For Figure 3 The flow chart of the low-power-consumption power distribution mode of the power distribution device after the sleep switching.

[0022] Figure 6 For Figure 3 The flow chart of the power distribution switching mode of the power distribution device after the ECU wake-up. DETAILED DESCRIPTION

[0023] The detailed description of the drawings is intended as an illustration of the current embodiments of the present application and is not intended to represent the only form in which the present application can be practiced. It should be understood that the same or equivalent functions can be accomplished by different embodiments that are intended to be within the spirit and scope of the present application.

[0024] One embodiment of the present application provides a power distribution device capable of realizing two power distribution modes, i.e., normal power distribution (power distribution by HSD chip) and low-power-consumption power distribution (power distribution by Efuse chip), as shown in Figure 2 , which comprises an MCU, an Efuse chip and a multi-channel high-side driver module.

[0025] The input pin of the Efuse chip is connected with one output pin of the MCU, for receiving the control signal output by the MCU, which can be an SPI or an IO port control signal; the output pin of the Efuse chip is connected with the power input of a plurality of ECUs, for outputting driving voltage to the ECUs to perform power distribution for the ECUs.

[0026] The multi-channel high-side driver module (HSD, High-side driver) comprises a plurality of driving channels corresponding to the plurality of ECUs one by one; the input pin of each driving channel is connected with one output pin of the MCU, for receiving the control signal output by the MCU, which can be a high / low level logic voltage; the output pin of each driving channel is connected with the power input of a corresponding ECU, for outputting driving voltage to the ECU to perform power distribution for the ECU.

[0027] The MCU is configured to control the plurality of driving channels to output driving voltage to the plurality of ECUs to perform normal power distribution, and control the Efuse chip to close the output of driving voltage, in response to the power-up of the whole vehicle; at this time, the multi-channel high-side driver module is controlled to provide large current power distribution for the ECU in normal working state, and the current is generally within 5A.

[0028] The MCU is also configured to control the Efuse chip to output a driving voltage for low-power power distribution of the plurality of ECUs and to control the plurality of driving channels to stop outputting the driving voltage in response to the whole vehicle hibernation; at this time, the Efuse chip outputs the current required after the ECU hibernation, and the current is generally less than 10 mA.

[0029] Specifically, the Efuse constant power distribution in the current automobile area controller is a new technology, and its application design is not perfect. In the area controller, both the large current (>5A) and the small current (<5A) constant power distribution ECU load are designed by one-to-one power distribution of the Efuse chip. Based on this, the above-mentioned power distribution device is proposed for the demand of the small current constant power distribution ECU (i.e. the plurality of ECUs). When there are at least two small current constant power distribution ECUs in the area controller, one Efuse chip and one multi-channel high-side drive module can be used for combined power distribution. The multi-channel high-side drive module is used for normal power distribution of the at least two small current constant power distribution ECUs during the whole vehicle power-on operation, and the Efuse chip is used for low-power power distribution of the at least two small current constant power distribution ECUs after the whole vehicle hibernation. Compared with the one-to-one power distribution scheme of the Efuse chip, the combined power distribution mode of the present application only needs to use one Efuse chip, reduces the use of the Efuse chip, the HSD chip has strong impact current capacity, does not need a power-on pre-charging circuit, and will not have the problem of power-on overcurrent shutdown, so it is not necessary to separately increase the power-on pre-charging circuit, and the HSD chip has low cost. In summary, the power distribution device of the present application has simple structure design, and can greatly reduce the cost of the power distribution device.

[0030] In some embodiments, an output pin of the Efuse chip is connected with each ECU through a power diode, an anode of the power diode is connected with the output pin of the Efuse chip, and a cathode of the diode is connected with a power input pin of the ECU.

[0031] Specifically, the power diode is a power diode with a lower voltage drop, mainly used for isolation of the HSD chip and the Efuse chip in parallel driving output, and the specific model is not limited, but the diode power consumption when the output is short-circuited needs to be considered. Because the Efuse chip has a limited output current in low-power mode, for example, the Efuse chip of ST VNF1048 has a fixed output current of 200mA in low-power mode, and for example, the Efuse chip of Infineon 2ED2410 can configure the output current size through a peripheral circuit in low-power mode; therefore, after sleep, if the ECU wiring harness is short-circuited to GND, the current increases sharply, that is, EUC overcurrent occurs, which exceeds the current limit of the Efuse chip in low-power mode, at this time, the corresponding power diode is reversely biased, the power diode is not conductive, and the fault ECU is isolated from the Efuse chip.

[0032] In some embodiments, the Efuse chip is provided with a diagnostic pin connected to the wake-up pin of the MCU, and the diagnostic pin is used to output a diagnostic signal to the MCU;

[0033] If the current flowing through any ECU is greater than the preset current limit of the Efuse chip in low-power mode when the Efuse chip performs low-power power distribution for the plurality of ECUs, the diagnostic signal is low, and the MCU is woken up; otherwise, the diagnostic signal is high, and the MCU is in sleep or powered by the multi-channel high-side drive module for the plurality of ECUs.

[0034] Specifically, a detection module can be provided, which can be integrated in the Efuse chip, for detecting whether the current flowing through the plurality of ECUs is greater than the preset current limit of the Efuse chip in low-power mode. The Efuse chip determines whether to output a high-level diagnostic signal or a low-level diagnostic signal according to the detection result.

[0035] The MCU is also used to control the Efuse chip and the multi-channel high-side drive module to work according to the diagnostic signal;

[0036] The MCU is used to output corresponding control signals to the plurality of drive channels and the Efuse chip in response to the whole vehicle power-on, control the plurality of drive channels to output drive voltages to normally distribute power to the plurality of ECUs, and control the Efuse chip to close the output drive voltage.

[0037] When the diagnostic signal is high, the MCU responds to the whole vehicle hibernation, outputs corresponding control signals to the plurality of drive channels and the Efuse chip, controls the Efuse chip to output drive voltage for low-power power distribution of the plurality of ECUs, and controls the plurality of drive channels to close the output of drive voltage.

[0038] When the diagnostic signal is low, the MCU is woken up by the Efuse chip, and is used to output corresponding control signals to the plurality of drive channels and the Efuse chip, control the plurality of drive channels to output drive voltage for normal power distribution of the plurality of ECUs, and control the Efuse chip to close the output of drive voltage. At this time, the power distribution mode is switched from low-power power distribution of the Efuse chip to normal power distribution of the HSD chip.

[0039] In some embodiments, the power distribution device further comprises a NOT circuit and a switching diode, an input pin of the NOT circuit is connected with the diagnostic pin, an output pin of the NOT circuit is connected with an anode of the switching diode, and a cathode of the switching diode is connected with an input pin of the plurality of drive channels; the NOT circuit is used to receive the diagnostic signal and perform NOT operation on the diagnostic signal. If the diagnostic signal is high, a low level is obtained after the NOT operation, and at this time the switching diode is not turned on. If the diagnostic signal is low, a high level is obtained after the NOT operation, and at this time the switching diode is turned on. The high level is sent to the input pin of the plurality of drive channels.

[0040] When the input pin of the drive channel inputs a high level, the output pin of the drive channel outputs drive voltage for normal power distribution of the ECU. When the input pin of the drive channel inputs a low level, the output pin of the drive channel closes the output of drive voltage.

[0041] Specifically, after the Efuse chip wakes up the MCU, the HSD chip outputs for normal power distribution of the ECU is switched, and the whole mode switching process is about 30 ms. This 30 ms will cause the power distribution of the rear ECU to be interrupted and cannot be maintained continuously during the switching process. Therefore, in the embodiment, a NOT circuit is designed. The diagnostic signal passes through the NOT circuit and forms an OR gate with the control signal output by the MCU to the plurality of drive channels. The level change of the diagnostic signal wakes up the MCU at the same time, and can also instantaneously control the HSD chip output to be opened, thereby ensuring the power distribution continuity of the ECU after the power distribution mode is switched.

[0042] In some embodiments, the multi-channel high-side drive module further comprises a current detection pin connected with an ADC function detection pin of the MCU, for outputting power distribution current signals of each ECU to the MCU; specifically, a current sensor can be arranged to detect the power distribution current signals of each ECU and feed back the detection results to the multi-channel high-side drive module.

[0043] The MCU is further configured to diagnose whether each ECU has a fault according to the power distribution current signals of each ECU, and if any ECU has a fault, control a drive channel corresponding to the any ECU to close the output of the drive voltage, isolate the fault ECU from the HSD chip, and realize an I2T protection function; specifically, the signals output by the current detection pin are corresponding voltage values obtained by ADC conversion of the power distribution current of each ECU, so as to facilitate the calculation of the MCU, and the MCU compares the voltage values with a preset voltage threshold value, if the voltage value is greater than or equal to the voltage threshold value, it is determined that the corresponding ECU has a fault, and if the voltage value is less than the voltage threshold value, it is determined that the corresponding ECU is normal.

[0044] In some embodiments, the multi-channel high-side drive module is provided with a diagnostic function selection input pin connected with a diagnostic function selection output pin of the MCU, and the diagnostic function selection input pin is configured to receive a diagnostic function selection signal output by the diagnostic function selection output pin of the MCU.

[0045] The multi-channel high-side drive module is specifically configured to determine a target ECU according to the diagnostic function selection signal and output a power distribution current signal of the target ECU to the MCU.

[0046] In some embodiments, the input pin of each drive channel is connected with an output pin of the MCU through a switching diode, the anode of the switching diode is connected with the MCU, and the cathode of the switching diode is connected with the input pin of each drive channel.

[0047] Specifically, when the output pin of the MCU outputs a high level, the corresponding switching diode is turned on, the input pin of the drive channel receives a high level, and the output pin of the drive channel outputs a drive voltage to normally distribute power to the ECU; when the output pin of the MCU outputs a low level, the corresponding switching diode is not turned on, the input pin of the drive channel receives a low level, and the output pin of the drive channel closes the output of the drive voltage.

[0048] In some embodiments, the multi-channel high-side drive module is formed by connecting multiple single-channel HSD chips in parallel, or by connecting multiple multi-channel HSD chips in parallel, or is a multi-channel HSD chip, or is formed by connecting at least one single-channel HSD chip and at least one multi-channel HSD chip in parallel, or is an SPI-controlled high-side drive chip.

[0049] For example, Figure 3 The power distribution device shown in a specific embodiment is shown in FIG. 1, and Figure 3 In the power distribution device shown in FIG. 1, the multi-channel high-side drive module is formed by connecting at least one single-channel HSD chip and at least one multi-channel HSD chip in parallel, and the multi-channel high-side drive module includes n HSD chips, which are named HSD_1 to HSD_n.

[0050] HSD_1 is a multi-channel HSD chip, HSD_1 includes two drive channels 1 and 2, drive channel 1 inputs IN_1 signal and outputs OUT_1 signal, drive channel 2 inputs IN_2 signal and outputs OUT_2 signal, HSD_1 is provided with an enable pin, a diagnostic function selection input pin, and a current detection pin, the enable pin is used to receive the enable signal DEN_1 output by the MCU, for example, when DEN_1 is high, drive channel 1 is enabled, and when DEN_1 is low, drive channel 1 is disabled; when IN_1 signal is high and drive channel 1 is enabled, drive channel 1 outputs OUT_1 signal as corresponding ECU power distribution, when IN_1 signal is low and drive channel 1 is disabled, drive channel 1 closes the output OUT_1 signal, for example, when DEN_2 is high, drive channel 2 is enabled, and when DEN_2 is low, drive channel 2 is disabled; when IN_2 signal is high and drive channel 2 is enabled, drive channel 2 outputs OUT_2 signal as corresponding ECU power distribution, when IN_2 signal is low and drive channel 2 is disabled, drive channel 2 closes the output OUT_2 signal, the diagnostic function selection input pin is used to receive the diagnostic function selection signal SEL_1 output by the MCU, and the current detection pin is used to output the ECU power distribution current signal ADC_1 to the MCU; when SEL_1 is low, ADC_1 outputs the current ADC value corresponding to channel OUT1; when SEL_1 is high, ADC_1 outputs the current ADC value corresponding to channel OUT2.

[0051] Among them, HSD_n is a single-channel HSD chip, HSD_1 includes a drive channel n, the drive channel n inputs IN_n signal, and outputs OUT_n signal, HSD_n is provided with an enable pin, a diagnostic function selection input pin and a current detection pin, the enable pin is used to receive the enable signal DEN_n output by the MCU, for example, when DEN_n is high, the drive channel n is enabled, when DEN_n is low, the drive channel n is not enabled; when the IN_n signal is high and the drive channel n is enabled, the drive channel n outputs the OUT_n signal as the corresponding ECU power distribution, when the IN_n signal is low and the drive channel n is not enabled, the drive channel n closes the output OUT_n signal, the diagnostic function selection input pin is used to receive the diagnostic function selection signal SEL_n output by the MCU, and the current detection pin is used to output the ECU power distribution current signal ADC_n to the MCU; when SEL_n is high, ADC_n output is the current ADC value corresponding to the channel OUT_n; when SEL_1 is low, ADC_n output is closed.

[0052] Specifically, the current ADC value refers to the result of converting the current signal into a digital signal through an analog-to-digital converter (ADC), and the ADC value is usually expressed as a digital form of current value, which can be used to measure and analyze the current; the size and accuracy of the ADC value depend on the bit number (bit number) and reference voltage of the ADC; the higher the bit number, the higher the accuracy of the ADC, and the wider the current range that can be represented; the reference voltage determines the unit and range of the ADC value; for example, assuming that an ADC has a bit number of 10 bits and a reference voltage of 5V; then the current resolution of the ADC is 5V / 2^10=5mV, that is, each ADC unit represents a current of 5 millivolts; if a current signal is 20mA, the corresponding ADC value is 20mA / 5mV=4; therefore, the current ADC value can be converted to a suitable voltage range and implemented using an appropriate ADC.

[0053] Among them, Figure 3 The power distribution device mainly includes the following working modes: normal power distribution after power-on operation, low-power power distribution after sleep switching, and power distribution switching after ECU wake-up.

[0054] Please refer to Figure 4The working mode of the normal power distribution after the power-up operation includes: after the MCU is powered up and initialized, the IN_1-IN_n pins are pulled high, that is, the HSD chip channel OUT is controlled to output, and the rear ECU is normally powered. At this time, the Efuse chip does not output under the control of the MCU; the MCU controls DEN_1-DEN_n and SEL_1-SEL_n at the same time, the voltage ADC value corresponding to the current of the ECU power distribution is polled and output by the change of the SEL_1-SEL_n level, ADC_1-ADC_n, which is used to monitor the current value of the rear ECU_n under normal power supply, if the ECU_n overflows or short-circuits to GND, the I2T protection can be turned off by the ADC output current value.

[0055] Please refer to Figure 5 The working mode of the low-power consumption power distribution in the sleep switching includes: before the whole vehicle enters the sleep state, the MCU switches the power distribution according to the following two conditions: ① the MCU receives the sleep instruction of the automobile CAN bus network message; ② the MCU reads the current value of the HSD chip channel output, that is, the ECU_1-ECU_n power distribution current, and the power distribution current is lower than 50mA; when the above two conditions are met, the MCU controls the Efuse chip to enter the low-power consumption mode, and the MCU controls the HSD chip output to be closed after a period of time, that is, the HSD chip enters the sleep mode and no longer distributes power to the ECU_1-ECU_n, at this time, the Efuse chip completely distributes power to the ECU_1-ECU_n in the sleep mode, so as to realize the automatic switching of the power distribution mode.

[0056] Please refer to Figure 6, the ECU wake-up power distribution switching mode of work includes: due to the Efuse chip low-power mode output current limit, such as ST VNF1048 in low-power mode only 200 mA fixed output current, Infineon 2ED2410 in low-power mode can be configured by peripheral circuit output current size; therefore, after sleep, if the wake-up ECU_1 ~ ECU_n is caused by the current back to normal working state or ECU_1 ~ ECU_n harness short circuit to GND, the current increases sharply, exceeds the Efuse chip low-power mode current limit, at this time the Efuse chip low-power mode off output, trigger diagnosis signal DIAG level change, wake up MCU power distribution mode switching to HSD chip power supply; HSD chip IN_n and diagnosis signal DIAG output parallel gate control, the role is Efuse chip wake-up MCU, to switch HSD chip output to ECU power distribution, the whole mode switching process in about 30 ms time, this 30 ms time will cause the wake-up ECU_1 ~ ECU_n power distribution interruption, unable to maintain in the switching over power distribution continuity, therefore, the diagnosis signal DIAG after the inverter circuit and IN_1 ~ IN_n or gate, diagnosis signal DIAG level change wake-up MCU, also can control HSD chip open instantaneously, to ensure that the mode switching ECU_1 ~ ECU_n power distribution continuity.

[0057] Another embodiment of the present application also provides a vehicle, which comprises the power distribution device of the above-mentioned embodiments.

[0058] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical application or improvement of the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A power distribution device, characterized by, The MCU, the Efuse chip and the multi-channel high-side drive module are included. The input pin of the Efuse chip is connected with the MCU, and is used for receiving the control signal of the MCU. The output pin of the Efuse chip is connected with a plurality of ECUs, and is used for outputting the drive voltage to the ECUs. The multi-channel high-side drive module includes a plurality of drive channels corresponding to the plurality of ECUs. The input pin of each drive channel is connected with the MCU, and is used for receiving the control signal of the MCU. The output pin of each drive channel is connected with a corresponding ECU, and is used for outputting the drive voltage to the ECU. The MCU is used for controlling the multi-channel high-side drive module to output the drive voltage to the plurality of ECUs for power distribution in response to the whole vehicle being powered on, and controlling the Efuse chip to close the output of the drive voltage.

2. The power distribution device of claim 1, wherein, The MCU is also used for controlling the Efuse chip to output the drive voltage to the plurality of ECUs for power distribution in response to the whole vehicle being in sleep, and controlling the multi-channel high-side drive module to close the output of the drive voltage.

3. The power distribution device of claim 2, wherein, The output pin of the Efuse chip is connected with each ECU through a power diode, the anode of the power diode is connected with the output pin of the Efuse chip, and the cathode of the power diode is connected with the power input pin of the ECU. The Efuse chip is provided with a diagnosis pin, and the diagnosis pin is used for outputting a diagnosis signal to the MCU. If the current flowing through any ECU is greater than a preset current limit value when the Efuse chip performs low-power power distribution on the plurality of ECUs, the diagnosis signal is low, otherwise, the diagnosis signal is high. The MCU is also used for controlling the Efuse chip and the multi-channel high-side drive module to work according to the diagnosis signal. The MCU controls the multi-channel high-side drive module to output the drive voltage to the plurality of ECUs for normal power distribution in response to the whole vehicle being powered on, and controls the Efuse chip to close the output of the drive voltage. When the diagnosis signal is high, the MCU controls the Efuse chip to output the drive voltage to the plurality of ECUs for power distribution in response to the whole vehicle being in sleep, and controls the multi-channel high-side drive module to close the output of the drive voltage.

4. The power distribution device of claim 3, wherein, When the diagnosis signal is low, the MCU controls the multi-channel high-side drive module to output the drive voltage to the plurality of ECUs for power distribution, and controls the Efuse chip to close the output of the drive voltage. The power distribution device further includes a NOT circuit and a switching diode, the input pin of the NOT circuit is connected with the diagnosis pin, the output pin of the NOT circuit is connected with the anode of the switching diode, and the cathode of the switching diode is connected with the input pin of the multi-channel high-side drive module. When the input pin of the drive channel inputs high level, the output pin of the drive channel outputs the drive voltage to the ECU for normal power distribution, and when the input pin of the drive channel inputs low level, the output pin of the drive channel closes the output of the drive voltage.

5. The power distribution device of claim 1, wherein, The multi-channel high-side drive module further comprises a current detection pin connected with the MCU, and configured to output a power distribution current signal of each ECU to the MCU; The MCU is further configured to diagnose whether each ECU is faulty according to the power distribution current signal of each ECU, and control a drive channel corresponding to any faulty ECU to stop outputting a drive voltage.

6. The power distribution device of claim 5, wherein, The multi-channel high-side drive module is provided with a diagnostic function selection input pin configured to receive a diagnostic function selection signal of the MCU. The multi-channel high-side drive module is specifically configured to determine a target ECU according to the diagnostic function selection signal, and output a power distribution current signal of the target ECU to the MCU.

7. The power distribution device of claim 1, wherein, The input pin of each drive channel is connected with the MCU through a switching diode, an anode of the switching diode is connected with the MCU, and a cathode of the switching diode is connected with the input pin of each drive channel.

8. The power distribution device of claim 1, wherein, The multi-channel high-side drive module is formed by parallel connection of multiple single-channel HSD chips, or multiple multi-channel HSD chips, or one multi-channel HSD chip, or parallel connection of at least one single-channel HSD chip and at least one multi-channel HSD chip, or an SPI-controlled high-side drive chip.

9. A vehicle characterized by comprising: The power distribution device comprises the power distribution device according to any one of claims 1-8.

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