CN220730312U - Automobile voltage monitoring system and electric automobile - Google Patents
Automobile voltage monitoring system and electric automobile Download PDFInfo
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- CN220730312U CN220730312U CN202322416959.0U CN202322416959U CN220730312U CN 220730312 U CN220730312 U CN 220730312U CN 202322416959 U CN202322416959 U CN 202322416959U CN 220730312 U CN220730312 U CN 220730312U
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Abstract
The application relates to an automobile voltage monitoring system and electric automobile, this monitored control system includes power management module and voltage monitoring module, and wherein power management module includes: the voltage generation unit is used for generating n paths of power supply voltages, wherein n is a positive integer greater than 1; n power supply voltage output ends connected with the voltage generating unit and used for outputting n paths of power supply voltages; the multi-path selection switch unit is connected with the n power supply voltage output ends and used for acquiring the power supply voltage output by the n power supply voltage output ends in a polling way, wherein the power supply voltage acquired by the current polling of the multi-path selection switch unit is the monitored voltage; the voltage monitoring module includes: the monitoring voltage input end is connected with the multi-path selection switch unit and used for inputting the monitored voltage; the monitoring unit is connected with the monitoring voltage input end and used for judging whether the monitored voltage is abnormal or not, and the number of ports of the voltage monitoring module can be reduced in the mode, so that the cost is reduced.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to an automobile voltage monitoring system and an electric automobile.
Background
With the rapid development of autopilot, the safety requirements of automobiles on domain controllers are also higher and higher, and especially, certain functional safety requirements are required for multiple input voltages of important chips such as an SOC (System on Chip) Chip or an MCU (Microcontroller Unit, microcontroller) Chip in the domain controllers, and the like, the level of ASIL (Automotive Safety Integrity Level, automobile safety integrity level) is generally required to be reached, so that the monitoring of these input voltages needs to meet the ASIL, and the multiple input voltages of these important chips are generally provided by a PMIC (Power Management IC, power management Chip).
As shown in fig. 1, in order to realize ASIL level monitoring of multiple input voltages V11-V16 of a chip IC1 (for example, an SOC chip or an MCU chip), ADC sampling monitoring and comparison are performed on multiple output voltages of a PMIC (that is, multiple input voltages of the chip IC 1) by using a chip IC2 with an ASIL level, wherein the chip IC2 is provided with 6 ADC sampling ports (ADC 1-ADC 6) respectively connected with the 6 output voltages of the PMIC, and the voltage sampled by each sampling port is compared with a reference voltage, so as to achieve the purpose of monitoring the voltage, so as to ensure that the chip IC1 achieves the input voltage to meet the functional safety requirement. However, in the above manner, one ADC sampling port needs to be configured for each output voltage of the PMIC, and it is difficult to satisfy the multi-channel ADC sampling circuit design under the condition that the ports of the battery core IC2 are limited, and the repeated arrangement of the multi-channel ADC sampling circuits also causes an increase in circuit cost.
Disclosure of Invention
Accordingly, it is necessary to provide an automobile voltage monitoring system and an electric automobile, which can reduce the number of ports of the voltage monitoring module and reduce the cost.
In a first aspect, the present application provides an automotive voltage monitoring system, comprising a power management module and a voltage monitoring module;
the power management module includes:
the voltage generation unit is used for generating n paths of power supply voltages, wherein n is a positive integer greater than 1;
n power supply voltage output ends connected with the voltage generation unit and used for outputting n paths of power supply voltages;
the multi-path selection switch unit is connected with the n power supply voltage output ends and used for acquiring power supply voltages output by the n power supply voltage output ends in a polling mode, wherein the power supply voltage acquired by the current polling of the multi-path selection switch unit is monitored voltage;
the voltage monitoring module includes:
the monitoring voltage input end is connected with the multi-path selection switch unit and is used for inputting the monitored voltage;
the monitoring unit is connected with the monitoring voltage input end and is used for judging whether the monitored voltage is abnormal or not;
the sampling unit is connected with any one of the power supply voltage output ends and is used for sampling the power supply voltage output by the connected power supply voltage output end to obtain a sampling voltage;
the monitoring unit is further configured to compare the monitored voltage with the sampling voltage when the monitored voltage is a power supply voltage output by a power supply voltage output end connected to the sampling unit.
The multi-path selection switch unit comprises a selection switch and a controller;
the selection switch comprises n selection ends and a fixed end, wherein the n selection ends are respectively connected with the n power supply voltage output ends, the fixed end is connected with the monitoring unit, and the controller is connected with the fixed end and used for controlling the selection switch to switch among the n selection ends.
The monitoring device comprises a monitoring unit, a fault prompting module and a fault prompting module, wherein the fault prompting module is connected with the monitoring unit and is used for sending out fault prompting when the monitored voltage is judged to be abnormal, and sending out fault prompting when the difference value between the monitored voltage and the sampling voltage exceeds a preset range, and the fault prompting module is also used for sending out fault prompting when the monitored voltage obtained in two adjacent times is the same.
The fault prompting module is an audible alarm or a light alarm.
The system further comprises a vehicle-mounted display screen, wherein the fault prompting module is connected with the vehicle-mounted display screen and used for displaying fault prompting information through the vehicle-mounted display screen.
The voltage monitoring module is realized by a single chip microcomputer.
Wherein n=4, the voltage generating unit includes a first chip, first to fourth capacitors, first to fourth resistors;
the LDO1 to LDO4 output pins of the first chip are respectively connected with 4 power supply voltage output ends through first to fourth resistors, one ends of the first to fourth capacitors are respectively connected with the LDO1 to LDO4 output pins of the first chip, and the other ends of the first to fourth capacitors are grounded.
The multi-path selection switch unit comprises a second chip, fifth to seventh capacitors and fifth to eighth resistors;
the VIN pin of the second chip is connected with 5V input voltage, one end of a fifth capacitor is connected with the VIN pin of the second chip, the other end of the fifth capacitor is grounded, the V1P5D pin of the second chip is grounded through a sixth capacitor, the V1P5A pin of the second chip is grounded through a seventh capacitor, the AMUX pin of the second chip is connected with the monitoring voltage output end through a fifth resistor, the EWARN pin of the second chip is grounded through a sixth resistor, the TBBEN pin of the second chip is grounded through a seventh resistor, and the VDDO TP pin of the second chip is grounded through an eighth resistor.
Wherein, first chip and second chip are the singlechip.
In a second aspect, the present application also provides an electric vehicle, including the vehicle voltage monitoring system described above.
The above describes an automobile voltage monitoring system and an electric automobile, the automobile voltage monitoring system comprises a power management module and a voltage monitoring module; the power management module includes: the voltage generation unit is used for generating n paths of power supply voltages, wherein n is a positive integer greater than 1; n power supply voltage output ends connected with the voltage generation unit and used for outputting n paths of power supply voltages; the multi-path selection switch unit is connected with the n power supply voltage output ends and used for acquiring power supply voltages output by the n power supply voltage output ends in a polling mode, wherein the power supply voltage acquired by the current polling of the multi-path selection switch unit is monitored voltage; the voltage monitoring module includes: the monitoring voltage input end is connected with the multi-path selection switch unit and is used for inputting the monitored voltage; the monitoring unit is connected with the monitoring voltage input end and is used for judging whether the monitored voltage is abnormal or not, therefore, in the method, n paths of power supply voltages are acquired through polling by the multi-path switch selection unit, the monitored voltage is sequentially acquired by the monitoring unit through the monitoring voltage input end to perform abnormality detection, therefore, the n paths of power supply voltages can be subjected to abnormality detection only by setting one monitoring voltage input end, compared with the existing method, the port number of the voltage monitoring module can be reduced, the cost is reduced, in addition, the monitoring unit is connected with any one of the power supply voltage output ends and is used for sampling the power supply voltage output by the connected power supply voltage output end to obtain sampling voltage, and the monitoring unit is further used for comparing the monitored voltage with the sampling voltage when the monitored voltage is the power supply voltage output by the power supply voltage output end connected with the sampling unit, so that whether the multi-path switch selection unit is abnormal or not can be judged according to a comparison result.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a voltage monitoring device in the prior art;
fig. 2 is a schematic structural diagram of an automotive voltage monitoring system provided in the present application;
FIG. 3 is a schematic diagram of a multi-way switch unit according to the present disclosure;
FIG. 4 is a schematic diagram of a voltage generating unit according to the present disclosure;
fig. 5 is another schematic structural diagram of the multiple-selection switch unit provided in the present application;
fig. 6 is a schematic structural diagram of the voltage monitoring module provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Referring to fig. 2, an automotive voltage monitoring system 100 according to an embodiment of the present application includes a power management module 10 and a voltage monitoring module 20. The power management module 10 may be configured to provide multiple power supply voltages to the important chip IC0 such as SOC or MCU.
The power management module 10 includes a voltage generating unit 101, n power supply voltage output terminals V1 to Vn, and a multiplexing switch unit 102. In this embodiment, n=4 is taken as an example for explanation, where n is a positive integer greater than 1, and the 4 power supply voltage output terminals are power supply voltage output terminals V1 to V4 respectively.
The voltage generating unit 101 is connected to the 4 power supply voltage output terminals V1 to V4, and is configured to generate 4 power supply voltages, and the 4 power supply voltages are output from the 4 power supply voltage output terminals to the chip IC0. The multiplexing switch unit 102 is connected to the 4 power supply voltage output terminals V1 to V4, and is configured to poll and acquire the power supply voltages output by the 4 power supply voltage output terminals, that is, the multiplexing switch unit 102 sequentially acquires the power supply voltages output by the 4 power supply voltage output terminals, where the power supply voltage currently acquired by the multiplexing switch unit 102 by polling is defined as the monitored voltage.
The voltage monitoring module 20 includes a monitoring voltage input end Vi1, a monitoring unit 201 and a sampling unit 202, the monitoring unit 201 is connected with the monitoring voltage input end Vi1, the multi-path selection switch unit 102 inputs a monitored voltage obtained by current polling to the monitoring voltage input end Vi1, the monitoring unit 201 is used for judging whether the monitored voltage is abnormal, specifically, the monitoring unit 201 is used for judging whether the monitored voltage is within a preset threshold range, if the monitored voltage is not within the threshold range, the monitored voltage indicates that an overvoltage or an undervoltage condition exists, the monitored voltage is abnormal data, and if the monitored voltage is within the preset threshold range, the monitored voltage is normal data. The threshold range is determined according to the normal power supply voltage of each power supply voltage output end, the monitored voltages of different power supply voltage output ends are different, and the threshold ranges adopted are different. For example, assuming that the normal supply voltage output by the supply voltage output terminal V2 is 3V, the threshold range may be set to 2.9V to 3.1V, when the monitoring unit 201 determines that the monitored voltage output by the supply voltage output terminal V2 is within the threshold range, it indicates that the supply voltage currently output by the supply voltage output terminal V2 is normal, otherwise, it is abnormal. Whereas for other supply voltage outputs, for example supply voltage output V4, the normal supply voltage is 2.3V, the corresponding threshold range may be set to 2.2V-2.5V.
Therefore, in the present application, n paths of power supply voltages are acquired by polling by using the multi-path switch selection unit 102, so that the monitoring unit 201 sequentially acquires the monitored voltages through the monitoring voltage input end Vi1 to perform anomaly detection, and therefore, the n paths of power supply voltages can be detected abnormally by only setting one monitoring voltage input end Vi1, and compared with the existing mode, the port number of the voltage monitoring module can be reduced, and the cost is reduced.
In addition, the sampling unit 202 is connected to any one of the power supply voltage output terminals, and is configured to sample the power supply voltage output by the connected power supply voltage output terminal, so as to obtain a sampled voltage. The power supply voltage output terminal, which is different from the other power supply voltages, may be selected to be connected to the sampling unit 202, that is, the power supply voltage output terminal, which is connected to the sampling unit 2020, is different from the other power supply voltages.
As shown in fig. 2, the sampling unit 202 is connected to the supply voltage output terminal V4, and is configured to sample the voltage of the supply voltage output terminal V4. The monitoring unit 201 is further configured to compare the monitored voltage with the sampling voltage when the monitored voltage is the power supply voltage output by the power supply voltage output terminal V4 connected to the sampling unit 202, and specifically may determine whether the voltage difference between the monitored voltage and the sampling voltage is within a preset difference range. When the monitored voltage is the supply voltage output by the supply voltage output terminal V4 to which the sampling unit 202 is connected, the sampled voltage is obtained by sampling the supply voltage output by the supply voltage output terminal V4, so that the monitored voltage and the sampled voltage should be substantially the same (may be slightly different due to the voltage drop of the transmission line) under normal conditions. Therefore, when there is a large difference between the monitored voltage and the sampling voltage, it is indicated that the multiplexing switch unit 102 may malfunction or fail, so that the acquired power supply voltage (i.e., the monitored voltage) is abnormal. Therefore, by determining whether the voltage difference between the monitored voltage and the sampling voltage is within the preset difference range, it can be detected whether the multiplexing switch unit 102 has a fault or failure, where the preset difference range can be set to a smaller value, for example, may be 0.2V-0.5V, if the voltage difference between the monitored voltage and the sampling voltage is smaller within the preset difference range, the multiplexing switch unit 102 is normal, if the voltage difference between the monitored voltage and the sampling voltage is not within the preset difference range, it is indicated that the voltage difference between the monitored voltage and the sampling voltage is larger, and the multiplexing switch unit 102 has a fault or failure.
In addition, by the automobile voltage monitoring system 100 of the present application, it is also possible to detect whether the multiple-selection switch unit 102 is stuck.
Specifically, a power supply voltage output terminal connected to the sampling unit 202 is defined as Vi, where 1.ltoreq.i.ltoreq.n; the multiplexing switch unit 102 polls and obtains the power supply voltages output by the n power supply voltage output ends according to the following polling sequence: vi→v1→Vi Vi→v2→Vi v3→ … … Vi Vn-1→Vi Vn. Specifically, for the 4 power supply voltage output terminals V1 to V4 shown in fig. 1, the power supply voltage output terminal connected to the sampling unit 202 is V4, and the order in which the multiplexing switch unit 102 polls to obtain the power supply voltages of the 4 power supply voltage output terminals V1 to V4 is: the multiplexing switch unit 102 obtains the supply voltage of the supply voltage output terminal V4 as the monitored voltage to be transmitted to the monitor unit 201, then obtains the supply voltage of the supply voltage output terminal V1 as the monitored voltage to be transmitted to the monitor unit 201, then obtains the supply voltage of the supply voltage output terminal V4 as the monitored voltage to be transmitted to the monitor unit 201, and so on.
If the multi-way selection switch unit 102 is stuck, for example, if the stuck is generated after the power supply voltage of the output terminal V1 is obtained, then when the next time point of obtaining the power supply voltage comes, the monitored voltage obtained by the multi-way selection switch unit 102 is still the power supply voltage of the output terminal V1 due to the stuck, so that the monitored voltages obtained before and after the two times are the same. However, the power supply voltages output by the output terminals of different power supply voltages may be the same, for example, the power supply voltages output by the output terminals V1 and V2 are the same, if the power supply voltages of the output terminals are obtained according to the polling sequence of v1→v2→v3→v4, whether the multiple-selection switch unit 102 is stuck or not, the monitored voltages obtained at the first time and the second time are the same, so that it cannot be detected whether the multiple-selection switch unit is stuck or not according to the polling sequence of v1→v2→v3→v4. According to the polling sequence of vi→v1→vi→v2→vi→v3→ … … vi→vn-1→vi→vn, since the power supply voltage output by the power supply voltage output terminal V4 connected to the sampling unit 202 is different from the other power supply voltages, the monitored voltages obtained 2 times adjacent to each other before and after the power supply voltage output terminal V4 is different from the other power supply voltages under normal conditions, the monitoring unit 201 compares whether the monitored voltages obtained two adjacent times are the same or not, if not, it is indicated that the clamping stagnation is not generated in the multiplexing switch unit 102, if so, it is indicated that the clamping stagnation is generated in the multiplexing switch unit 102, and thus, whether the clamping stagnation is generated in the multiplexing switch unit 102 can be detected.
Optionally, the automotive voltage monitoring system 100 of the present application may further include a fault prompting module 30, where the fault prompting module 30 is connected to the monitoring unit 201 and is configured to send out a fault reminder when the monitored voltage is abnormal, and send out a fault reminder when the difference between the monitored voltage and the sampling voltage exceeds a preset range, and the fault prompting module 30 is further configured to send out a fault reminder when the monitored voltages obtained in two adjacent times are the same.
In some embodiments, the fault notification module 30 may be an audible alarm or a light alarm. The fault reminding information can be output in a voice broadcasting mode, or in a lamplight flashing mode. The sound alarm can be realized through the vehicle-mounted voice broadcasting system, namely, the vehicle-mounted voice broadcasting system is used for broadcasting fault prompts.
In other embodiments, the automobile voltage monitoring system may further include an on-board display screen, and the fault prompting module 30 is connected to the on-board display screen, and is configured to display fault prompting information through the on-board display screen.
Referring to fig. 3, in one embodiment of the present application, the multiple-path selection switch unit 102 includes a selection switch 1021 and a controller 1022, where the selection switch 1021 includes n selection terminals A1 and a fixed terminal A2, the n selection terminals A1 are respectively connected with the n supply voltage output terminals V1 to Vn, the fixed terminal A2 is connected with the monitoring unit 201, and the controller 1022 is connected with the fixed terminal A2, and is used for controlling the selection switch 1021 to switch between the n selection terminals A1, specifically controlling the fixed terminal A2 to be sequentially connected with the n selection terminals A1. It will be appreciated that when the fixed end A2 is connected to any one of the selection terminals A1, the supply voltage of the supply voltage output terminal to which the selection terminal A1 is connected can be obtained, so that polling can be achieved by switching the fixed end A2 between n selection terminals A1.
Further, the switching sequence of the n selection terminals A1 may correspond to the above polling sequence, that is, the controller 1022 controls the fixed terminal A2 to be sequentially connected to the n selection terminals A1, so that the fixed terminal A2 is sequentially connected to the corresponding power supply voltage output terminal in the sequence of vi→v1→vi→v2→vi→v3→ … … vi→vn-1→vi→vn, thereby enabling the multiple-path selection switch unit 102 to sequentially obtain the power supply voltage of the corresponding power supply voltage output terminal. More specifically, the fixed end A2 is first connected to the connection terminal A1 connected to the power supply voltage output terminal Vi, then switched to the connection terminal A1 connected to the power supply voltage output terminal V1, then switched to the connection terminal A1 connected to the power supply voltage output terminal Vi, then switched to the connection terminal A1 connected to the power supply voltage output terminal V2, and so on. In this way, whether or not the clamping of the multiple-selection switch unit 102 occurs can be detected by comparing whether or not the monitored voltages obtained by the monitoring unit 201 are the same for two adjacent times.
Of course, in other modes, if the power supply voltages of the plurality of power supply voltage output terminals are different, the power supply voltages of the output terminals may be obtained according to the polling sequence of v1→v2→v3→ … … Vn-1→vn, and the switching sequence of the n selection terminals A1 may correspond to the polling sequence.
As shown in fig. 4, in an embodiment of the present application, the voltage generating unit 101 includes a first chip U1, first to fourth capacitors C1 to C4, and first to fourth resistors R1 to R4.
The LDO1 to LDO4 output pins of the first chip U1 are respectively connected with 4 power supply voltage output ends V1 to V4 through first to fourth resistors R1 to R4, one ends of the first to fourth capacitors C1 to C4 are respectively connected with the LDO1 to LDO4 output pins of the first chip U1, and the other ends of the first to fourth capacitors C1 to C4 are grounded. In this embodiment, referring to fig. 5, the multiplexer unit 102 may also be a programmable analog multiplexer AMUX, which includes a second chip U2, fifth to seventh capacitors C5 to C7, and fifth to eighth resistors R5 to R8. The VIN pin of the second chip U2 is connected to the 5V input voltage, one end of the fifth capacitor C5 is connected to the VIN pin of the second chip U2, the other end of the fifth capacitor C5 is grounded, the V1P5D pin of the second chip U2 is grounded through the sixth capacitor C6, the V1P5A pin of the second chip U2 is grounded through the seventh capacitor C7, the AMUX pin of the second chip U2 is connected to the monitor voltage input terminal Vi1 through the fifth resistor R5, the EWARN pin of the second chip is grounded through the sixth resistor R6, the TBBEN pin of the second chip U2 is grounded through the seventh resistor R7, and the VDDO TP pin of the second chip U2 is grounded through the eighth resistor R8. The second chip U2 is configured to poll and obtain the power supply voltages output by the 4 power supply voltage output ends V1 to V4, and transmit the power supply voltages acquired by polling to the monitoring unit 201 through the monitoring voltage input end Vi1 from the AMUX pin.
Further, the voltage monitoring module 20 of the present application may be implemented by a single chip, which may be an ASIL-level chip, so as to implement voltage monitoring of the ASIL level, so as to ensure that the power supply of the power management module 10 meets the functional security level requirement of the ASIL level. As shown in fig. 6, the voltage monitoring module 20 may be implemented by a third chip U3 at an ASIL level, that is, the monitoring unit 201 and the sampling unit 202 are integrated in the same third chip U3, the mcu_adc1_ain0 pin of the third chip U3 is a monitoring voltage input terminal Vi1, connected to the AMUX pin of the second chip U2, and the mcu_adc1_ain1 of the third chip U3 is a sampling pin, connected to any one of the power supply voltage output terminals, for obtaining a sampling voltage.
The first chip U1 and the second chip U2 are both single-chip computers, and the models of the first chip U1 and the second chip U2 may be PC33PF8100.
The embodiment of the application also provides an electric automobile, which comprises the automobile voltage monitoring system described in any embodiment.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. The automobile voltage monitoring system is characterized by comprising a power management module and a voltage monitoring module;
the power management module includes:
the voltage generation unit is used for generating n paths of power supply voltages, wherein n is a positive integer greater than 1;
n power supply voltage output ends connected with the voltage generation unit and used for outputting n paths of power supply voltages;
the multi-path selection switch unit is connected with the n power supply voltage output ends and used for acquiring power supply voltages output by the n power supply voltage output ends in a polling mode, wherein the power supply voltage acquired by the current polling of the multi-path selection switch unit is monitored voltage;
the voltage monitoring module includes:
the monitoring voltage input end is connected with the multi-path selection switch unit and is used for inputting the monitored voltage;
the monitoring unit is connected with the monitoring voltage input end and is used for judging whether the monitored voltage is abnormal or not;
the sampling unit is connected with any one of the power supply voltage output ends and is used for sampling the power supply voltage output by the connected power supply voltage output end to obtain a sampling voltage;
the monitoring unit is further configured to compare the monitored voltage with the sampling voltage when the monitored voltage is a power supply voltage output by a power supply voltage output end connected to the sampling unit.
2. The automotive voltage monitoring system of claim 1, wherein the multiple-way selection switch unit comprises a selection switch and a controller;
the selection switch comprises n selection ends and a fixed end, wherein the n selection ends are respectively connected with the n power supply voltage output ends, the fixed end is connected with the monitoring unit, and the controller is connected with the fixed end and used for controlling the selection switch to switch among the n selection ends.
3. The automotive voltage monitoring system of claim 1, further comprising a fault prompting module connected to the monitoring unit for issuing a fault alert when the monitored voltage is judged to be abnormal and issuing a fault alert when the difference between the monitored voltage and the sampled voltage exceeds a preset range.
4. A vehicle voltage monitoring system according to claim 3, wherein the fault notification module is an audible alarm or a light alarm.
5. The automotive voltage monitoring system of claim 3, further comprising a vehicle-mounted display screen, wherein the fault prompting module is coupled to the vehicle-mounted display screen for displaying fault prompting information via the vehicle-mounted display screen.
6. The automotive voltage monitoring system of claim 1, wherein the voltage monitoring module is implemented using a single-chip microcomputer.
7. The automotive voltage monitoring system of claim 1, wherein the n=4, the voltage generating unit comprises a first chip, first to fourth capacitors, first to fourth resistors;
the LDO1 to LDO4 output pins of the first chip are respectively connected with 4 power supply voltage output ends through first to fourth resistors, one ends of the first to fourth capacitors are respectively connected with the LDO1 to LDO4 output pins of the first chip, and the other ends of the first to fourth capacitors are grounded.
8. The automotive voltage monitoring system of claim 7, wherein the multi-way selection switch unit comprises a second chip, fifth to seventh capacitors, fifth to eighth resistors;
the VIN pin of the second chip is connected with 5V input voltage, one end of a fifth capacitor is connected with the VIN pin of the second chip, the other end of the fifth capacitor is grounded, the V1P5D pin of the second chip is grounded through a sixth capacitor, the V1P5A pin of the second chip is grounded through a seventh capacitor, the AMUX pin of the second chip is connected with the monitoring voltage output end through a fifth resistor, the EWARN pin of the second chip is grounded through a sixth resistor, the TBBEN pin of the second chip is grounded through a seventh resistor, and the VDDO TP pin of the second chip is grounded through an eighth resistor.
9. The automotive voltage monitoring system of claim 7, wherein the first chip and the second chip are both single-chip computers.
10. An electric vehicle comprising the vehicle voltage monitoring system of any one of claims 1-9.
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| CN202322416959.0U CN220730312U (en) | 2023-09-05 | 2023-09-05 | Automobile voltage monitoring system and electric automobile |
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| CN202322416959.0U CN220730312U (en) | 2023-09-05 | 2023-09-05 | Automobile voltage monitoring system and electric automobile |
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