CN110228395B - Dual power supply circuit system - Google Patents
Dual power supply circuit system Download PDFInfo
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- CN110228395B CN110228395B CN201910515083.0A CN201910515083A CN110228395B CN 110228395 B CN110228395 B CN 110228395B CN 201910515083 A CN201910515083 A CN 201910515083A CN 110228395 B CN110228395 B CN 110228395B
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- 230000009977 dual effect Effects 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000001131 transforming effect Effects 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 25
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention relates to a dual power supply circuit system. The dual power circuitry includes: a first power supply circuit for supplying a first power supply; the second power supply circuit is used for acquiring a high-voltage power supply as input, transforming the high-voltage power supply and providing the transformed high-voltage power supply as a second power supply; and a microprocessor for realizing switching control between the first power supply circuit and the second power supply circuit. According to the invention, the problems of switching between the standby power supply and the vehicle storage battery and loop self-checking can be solved. Further, according to the present invention, the active discharge function, the high voltage detection function, and the overvoltage protection function can be integrated in the backup power supply design.
Description
Technical Field
The invention relates to the field of power management of vehicles, in particular to a dual-power circuit system of a vehicle and the vehicle with the dual-power circuit system.
Background
Current new energy automobile motor drive systems EDS (electric drive system) require the use of an inverter to drive the motor. An inverter is a power electronic device that converts high voltage electrical energy by low voltage control. The control part needs low-voltage power supply to achieve the control purpose, and the low-voltage power source is usually a whole vehicle storage battery and is called KL30.
KL30 belongs to a rough discharge source, and due to the severe working environment of the whole vehicle, abnormal waveforms such as transient drop or undervoltage and overvoltage and the like usually appear in KL30, in order to ensure that a motor controller, namely an inverter, can still work normally for a short time under the abnormal condition of KL30, a standby power supply needs to be designed to ensure that the inverter works normally for a period of time, and particularly after the functional safety requirement is put forward, the design of the standby power supply becomes important.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a dual power circuit system and a dual power circuit control method capable of effectively switching a storage battery and a standby power of a whole vehicle.
The dual power supply circuit system of the present invention is characterized by comprising:
A first power supply circuit for supplying a first power supply;
The second power supply circuit is used as a standby power supply of the first power supply circuit, a high-voltage power supply is obtained as input, and the high-voltage power supply is provided as a second power supply after being transformed; and
And the microprocessor is used for realizing switching control between the first power supply circuit and the second power supply circuit, wherein the second power supply circuit is enabled when the microprocessor detects that the first power supply circuit works normally.
Optionally, the method further comprises: and a first switch (S4) arranged between the second power supply circuit and the microprocessor and enabled by the microprocessor, wherein a first end (Vfb) of the first switch is connected with the second power supply circuit, and a second end (HVLV) of the first switch is connected with the microprocessor.
Optionally, the voltage value of the second terminal is set to a prescribed threshold value, where the prescribed threshold value is located within the operating voltage range of the first power supply circuit.
Optionally, the method further comprises: and a second switch (D3) configured to cause the second power supply circuit to supply power when the output voltage of the first power supply circuit is less than the prescribed threshold.
Optionally, the second power supply circuit is an inverter.
Optionally, the inverter is configured to operate for a prescribed period of time while maintaining inverter peak conditions and thereafter shut down inverter power levels.
Optionally, the microprocessor is configured to read the voltage of the second terminal in the case of enabling the first switch, and determine whether to be supplied by the second power supply circuit according to the voltage of the second terminal.
Optionally, the microprocessor further comprises:
the counter is used for counting the abnormal power failure condition of the microprocessor;
A memory for storing a count value of the counter; and
And the control module is used for controlling the first power supply circuit to supply power under the condition that the count value is larger than a preset threshold value.
Optionally, the microprocessor determines whether the second switch is operating normally by comparing the voltage value of the second terminal (HVLV) of the first switch with the output voltage value (kl30_p) of the first power supply circuit.
Optionally, the method further comprises:
The active discharging module is used for realizing the active discharging of the high-voltage power supply; and
A digital isolation module for realizing the digital isolation between the active discharging module and the microprocessor,
Wherein the active discharge module is configured to be activated when the digital isolation module is powered down.
Optionally, the active discharge module is configured to employ a pulsed discharge mode until the high voltage power source is absent.
Optionally, a high-voltage detection module is used for performing high-voltage detection and inputting a high-voltage detection result to the microprocessor; and
And the analog isolation module is used for realizing analog isolation between the high-voltage detection module and the high-voltage power supply side.
Optionally, the method further comprises:
And the overvoltage protection module is arranged between the analog isolation module and the microprocessor and is used for realizing overvoltage protection.
The vehicle of the present invention is characterized by comprising the dual power supply circuit system.
The switching method of the dual power supply circuit of the invention realizes the switching of the first power supply circuit and the second power supply circuit by utilizing a microprocessor, and is characterized in that the method comprises the following steps:
A first step of: enabling a first power supply circuit and powering the microprocessor by the first power supply circuit;
And a second step of: judging whether the first power supply circuit works normally or not, and enabling the second power supply circuit under the condition that the first power supply circuit works normally as a judging result;
and a third step of: judging whether the second power supply circuit works normally or not, and enabling the first power supply circuit to not work under the condition that the second power supply circuit works normally.
Optionally, after the third step, further comprising:
fourth step: judging whether the microprocessor is abnormally powered down, and enabling the first power supply circuit to work under the condition that the judging result is that the microprocessor is abnormally powered down.
The computer-readable medium of the present invention, on which a computer program is stored, is characterized in that,
The computer program, when executed by the processor, implements the switching method of the dual power supply circuit described above.
The computer equipment comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and is characterized in that the processor realizes the switching method of the dual power supply circuit when executing the computer program.
As described above, according to the present invention, the switching between the backup power source and the vehicle battery and the loop self-test problem can be solved. Further, according to the present invention, the active discharge function, the high voltage detection function, and the overvoltage protection function can be integrated in the backup power supply design. Furthermore, according to the invention, the active discharging circuit can be activated under the abnormal condition of the inverter, thereby ensuring that the high-voltage capacitance is discharged and realizing electrical safety.
Drawings
Fig. 1 is a circuit schematic diagram of a dual power circuit system according to an embodiment of the present invention.
Fig. 2 is a flow chart showing the switching self-test performed by the dual power circuit system according to an embodiment of the invention.
Detailed Description
The following presents a simplified summary of the invention in order to provide a basic understanding of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
Fig. 1 is a circuit schematic diagram of a dual power circuit system according to an embodiment of the present invention. The present embodiment exemplifies a case where the dual power supply circuit system is applied to a vehicle.
As shown in fig. 1, the dual power circuit system according to an embodiment of the present invention includes:
A first power supply circuit KL30;
A second power supply circuit 10 (abbreviated as "FB") as a standby power supply for the first power supply circuit KL 30;
A microprocessor 20 (also simply referred to as "MCU" in fig. 2 below) supplied with power by the first power supply circuit KL30 or the second power supply circuit 10;
A first power management module 30 that performs power management on the first power circuit; and
A first power management module 40 enabled by microprocessor 20 via enable signal EN and implementing power management for second power circuit 10.
The second power supply circuit 10 receives a power supply from a high-voltage power source HVDC terminal (generally, for example, 60 to 450 v) as an input, and converts the high-voltage power supply to output a voltage Vfb, thereby providing the voltage as a second power supply.
Here, as one example, the second power supply circuit 10 employs a flyback (fly back) standby power supply. Flyback refers to that when a switching tube is switched on, an output transformer acts as an inductor, electric energy is converted into magnetic energy, and at the moment, an output loop has no current; in contrast, when the switching tube is turned off, the output transformer releases energy, magnetic energy is converted into electric energy, and current exists in the output loop.
After the first power supply circuit KL30 is powered on, the diode D1 is turned on, the switch S2 (normally closed switch) is turned on, the first power supply circuit KL30 works normally, the microcontroller 20 is powered on through the input terminal AD, and the system works normally. On the other hand, the second power supply circuit 10, which is a standby power supply after the high-voltage direct-current HVDC side is powered on, but the switch S4 (normally open switch) is turned off.
When the microprocessor 20 detects that the second power supply circuit 10 has a standby power supply power-up condition, the microprocessor 20 enables the switch S4, where the power-up condition refers to that the system power-up self-test is normal, that is, the circuit powered by the first power supply KL30 works normally, and it can be also implemented by judging whether the first power supply circuit KL30 works normally. At this time, the voltage value at the HVLV terminal (i.e., the high-voltage low-voltage terminal) in fig. 1 is about the output voltage of the second power supply circuit 10, where the output of the second power supply circuit 10 is set to 9V, and the first power supply circuit KL30 operates normally in the voltage range of 9-16V. It can be seen that the output of the second power supply circuit 10 is within the normal operating voltage range of the first power supply circuit KL 30.
When the voltage of the first power supply circuit KL30 is less than 9V due to some abnormality, the diode D3 is turned on, and the second power supply circuit 10 starts supplying power to the input terminal ADC of the microprocessor 20, whereby the normal operation of the whole system can be ensured.
The second power supply circuit 10 is constituted by a flyback standby power supply, for example, an inverter. As an example, the second power supply circuit 10 may be related to: enabling to maintain short-term operation, e.g. several seconds, under peak inverter conditions, after which the inverter power stage is turned off; the second power circuit 10 is designed to have a rated power equal to the standby power when the inverter is turned off, and a peak power equal to the low-voltage power required by the peak working condition of the inverter. Such index definition may optimize the design of the flyback standby power supply.
Further, the dual power circuit system according to an embodiment of the present invention may further include: an active discharge module 50 for realizing active discharge of the high-voltage power supply; and a digital isolation module 60 for implementing digital isolation between the active discharge module and the microprocessor.
As one example, the main discharge module 50 is configured to be activated when the digital isolation module 60 is powered down. The active discharge circuit 50 is started when the second power supply circuit 10 fails and the vehicle is in fault, and the discharge enable signal EN2 is transmitted to the active discharge circuit 50 through the digital isolation module 60. The active discharge circuit 50 should be designed to be active low and the digital isolation module 60 should be able to activate the active discharge function of the active discharge circuit 50 after power loss. The active discharge circuit 50 is designed, for example, in hardware, to complete the discharge within a prescribed rapid discharge time, and then to stop the discharge for several seconds, and should be able to continue using such pulsed discharge if one discharge fails, i.e., the high voltage is still present.
Further, the dual power circuit system according to an embodiment of the present invention may further include:
a high voltage detection module 70 for performing high voltage detection and inputting a high voltage detection result (hvdc_lv) to the microprocessor 20; and
The analog isolation module 80 is configured to implement analog isolation between the high voltage detection module 70 and the HVDC end of the high voltage power source.
The high-voltage power source HVDC end is detected by the high-voltage detection module 70 after passing through the analog isolation module 80 and is input into the microprocessor 20 for sampling, so that the real-time acquisition of the high-voltage signal is realized and is provided to the input end ADC end of the microprocessor 20 for controlling the second power source circuit 10.
Wherein, 5v_p and 5v_s of the analog isolation module 80 represent the power supply of the primary side and the secondary side of the isolation chip, respectively, and similarly, 5v_p and 5v_s of the digital isolation module 60 represent the power supply of the primary side and the secondary side of the isolation chip, respectively.
Further, the dual power circuit system according to an embodiment of the present invention may further include: an overvoltage protection module 90. The overvoltage protection module 90 is disposed between the analog isolation module 80 and the microprocessor 20 for implementing overvoltage protection, and supplies the overvoltage-protected voltage OVP to the input terminal D1 of the microprocessor 20.
Fig. 2 is a flow chart showing a dual power circuit system switching self-test according to an embodiment of the invention.
Next, a flow of switching self-test of the dual power circuit system according to an embodiment of the present invention will be described with reference to fig. 2.
In step S1, the first power supply circuit KL30 is powered on, the diode D1 is turned on, the switch S2 is turned on, and then the output terminal kl30_p of the first power supply circuit KL30 is powered on.
In step S2, it is determined whether the first power management module 30 is operating, and if yes, the process proceeds to step S3, and if no, the process proceeds to step S12. In step S12, it is determined that the diode D1 or the switch S2 is open, and the PEU (power electronic unit, a power electronic device of the vehicle, not shown in fig. 1) is safely turned off.
In step S3, as the first power management module 30 is operating, the microprocessor 20 is powered up and operating, and the switch S4 is enabled via the signal EN1, i.e., the HVLV terminal is powered up.
In step S4, the voltage value at HVLV terminal is read through the ADC port of the microprocessor 20, whether HVLV terminal is working normally (i.e. whether the second power supply circuit 10 is working normally) is determined, if it is determined that the voltage at HVLV terminal is abnormal, the system goes to step S13, the system goes to a controllable safe state, the second power supply circuit 10 stops supplying power, PEU is turned off safely, if it is determined that the voltage at HVLV terminal is normal, the microprocessor 20 turns off the switch S2 by instruction 'sw_uc=1', and closes the first power supply circuit KL30, at this time, attempts to take power from the standby second power supply circuit 10.
If the microprocessor 20 is powered down, this means that the standby power supply (the second power supply circuit 10) fails. Here, the microprocessor 20 may further be provided with: a counter 21 for counting the abnormal power-down of the microprocessor 20; a memory 22 for storing a count value of the counter; and a control module 23 for controlling so as to be supplied with power by the first power supply circuit in the case where the count value is greater than a preset threshold value.
Specifically, if the microprocessor 20 is abnormally powered down, the count value of the counter 21 is incremented by 1, and the memory 22 stores the abnormal electricity count value. As one example, the memory 22 is implemented by, for example, an E2 PROM.
Since sw_uc=0 after the microprocessor 20 is powered down, the process jumps to step S1, and the above steps are repeated, in step S5, the control module 23 of the microprocessor 20 determines whether the counter value n_fail > TBD of the abnormal power down (TBD is a preset threshold value), if yes, the process goes to step S14, and if no, the process goes to step S6. In step S14, it is determined that the diode D3 is open or the switch S4 is open, and the PEU is safely turned off.
In step S6, the first power supply circuit KL30 is turned off by sw_uc=1, so that the switch S2 is turned off.
Next, in step S7, it is determined whether the microprocessor 20 is powered down, if yes, the process goes to step S19, and if no, the process goes to step S8. In step S19, the counter value is incremented by 1 before the microprocessor 20 is powered down and returns to step S1.
In step S8, since the microprocessor 20 is not powered down, meaning that the second power supply circuit 10 as the standby power supply is powered up normally, the output voltage vkl30_p of the first power supply circuit KL30 is read.
In step S9, it is determined whether vkl30_p= HVLV-Vf. Where VF refers to the voltage drop of diode D3 and HVLV refers to the voltage at HVLV. If vkl30_p= HVLV-Vf is determined, the process proceeds to step S10, otherwise, the process proceeds to step S15 or step S17. In step S10, it is determined that the diode D3 is normal and the PEU is turned on in step S11.
In step S15, it is determined whether vkl30_p=kl30, if yes, the process proceeds to step S16, in which it is determined that the switch S2 is short-circuited in step S16, and the PEU is turned off, and if no, the process proceeds to step S17. Next, in step S17, it is determined whether kl30_p= HVLV, if yes, step S18 is continued, and in step S18, it is determined that the diode D3 is short-circuited, and the PEU is turned off.
As described above, according to the dual power supply circuit system and the dual power supply switching method of the present invention, switching between the backup power supply and the vehicle battery can be solved, and loop self-test of the backup power supply and the vehicle battery can be realized. Further, according to the present invention, the active discharge function, the high voltage detection function, and the overvoltage protection function can be integrated in the backup power supply design. Furthermore, according to the invention, the active discharging circuit can be activated under the abnormal condition of the inverter, thereby ensuring that the high-voltage capacitance is discharged and realizing electrical safety.
The above examples mainly illustrate the dual power supply circuitry of the present invention. Although only a few specific embodiments of the present invention have been described, those skilled in the art will appreciate that the present invention may be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and the invention is intended to cover various modifications and substitutions without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (16)
1. A dual power supply circuit system, comprising:
A first power supply circuit for supplying a first power supply;
the second power supply circuit is used for acquiring a high-voltage power supply as an input and providing the high-voltage power supply as a second power supply after transforming the high-voltage power supply;
A microprocessor for realizing switching control between the first power supply circuit and the second power supply circuit;
a first switch S4 disposed between the second power supply circuit and a diode D3, enabled by the microprocessor, wherein a first end of two ends of the first switch S4 is connected to the second power supply circuit, and a second end of two ends of the first switch S4 is connected to the diode D3;
the diode D3 is connected between the second terminal of the first switch S4 and the output terminal of the first power supply circuit;
wherein when the microprocessor detects that the first power supply circuit works normally, the second power supply circuit is enabled,
Wherein the microprocessor is further configured to:
Counting the abnormal power-down condition of the microprocessor, controlling to increment a count value by 1 and enable the first power supply circuit to supply power when the abnormal power-down condition of the microprocessor is caused, and judging that the first switch S4 or the diode D3 is open when the count value is larger than a preset threshold value;
Judging whether the second power supply circuit works normally or not, and enabling the first power supply circuit to not work under the condition that the second power supply circuit works normally as a judging result; and
When the second power supply circuit is normally operated and the first power supply circuit is not operated, judging whether the voltage of the output end of the first power supply circuit is equal to the voltage of the second end minus the voltage drop of the diode D3, and if not, judging as follows:
if the voltage of the output end of the first power supply circuit is equal to the voltage provided by the first power supply circuit, judging that a short circuit exists in a switch S2 in the first power supply circuit, wherein the switch S2 is used for switching on and off the first power supply circuit;
If the voltage of the output end of the first power supply circuit is equal to the voltage of the second end, judging that the diode D3 has short circuit;
wherein the microprocessor is still further configured to turn off the power electronics PEU of the vehicle based on any one of the following conditions:
The first power supply circuit does not work normally, or the second power supply circuit does work normally, or the count value is larger than a preset threshold value, or a switch S2 in the first power supply circuit is short-circuited, or a diode D3 is short-circuited.
2. The dual power circuitry of claim 1,
The voltage value of the second end is set to be a specified threshold value, and the specified threshold value is located in the working voltage range of the first power supply circuit.
3. The dual power circuitry of claim 2 wherein the diode D3 is configured to conduct to cause the second power circuit to provide power when the output voltage of the first power circuit is less than the prescribed threshold.
4. The dual power circuitry of claim 1,
The second power supply circuit is an inverter.
5. The dual power circuitry of claim 4,
The inverter is configured to operate for a prescribed period of time while maintaining inverter peak conditions and thereafter shut down the inverter power level.
6. The dual power circuitry of claim 4,
The microprocessor is configured to read the voltage of the second terminal in the case of enabling the first switch S4, and determine whether to be powered by the second power supply circuit according to the voltage of the second terminal.
7. The dual power circuitry of claim 1,
The microprocessor determines whether the diode D3 works normally by comparing the voltage value of the second end of the first switch S4 with the output voltage value of the first power circuit.
8. The dual power circuitry of any of claims 1-7, further comprising:
The active discharging module is used for realizing the active discharging of the high-voltage power supply; and
A digital isolation module for realizing the digital isolation between the active discharging module and the microprocessor,
Wherein the active discharge module is configured to be activated when the digital isolation module is powered down.
9. The dual power circuitry of claim 8,
The active discharge module is configured to employ a pulsed discharge mode until the high voltage power source is absent.
10. The dual power circuitry of any of claims 1-7, further comprising:
the high-voltage detection module is used for carrying out high-voltage detection and inputting a high-voltage detection result to the microprocessor; and
And the analog isolation module is used for realizing analog isolation between the high-voltage detection module and the high-voltage power supply side.
11. The dual power circuitry of claim 10, further comprising:
And the overvoltage protection module is arranged between the analog isolation module and the microprocessor and is used for realizing overvoltage protection.
12. A vehicle comprising the dual power circuit system according to any one of claims 1 to 11.
13. A switching method for the dual power circuit system of any one of claims 1 to 11, the switching method being implemented by a microprocessor for switching between a first power circuit and a second power circuit, the method comprising the steps of:
A first step of: enabling a first power supply circuit and powering the microprocessor by the first power supply circuit;
And a second step of: judging whether the first power supply circuit works normally or not, and enabling the second power supply circuit under the condition that the first power supply circuit works normally as a judging result;
And a third step of: judging whether the second power supply circuit works normally or not, and enabling the first power supply circuit to not work under the condition that the second power supply circuit works normally as a judging result;
wherein the method further comprises:
Counting the abnormal power-down condition of the microprocessor, controlling to increment a count value by 1 and enable the first power supply circuit to supply power when the abnormal power-down condition of the microprocessor is caused, and judging that the first switch S4 or the diode D3 is open when the count value is larger than a preset threshold value;
When the second power supply circuit is normally operated and the first power supply circuit is not operated, judging whether the voltage of the output end of the first power supply circuit is equal to the voltage of the second end minus the voltage drop of the diode D3, and if not, judging as follows: if the voltage of the output end of the first power supply circuit is equal to the voltage provided by the first power supply circuit, judging that a short circuit exists in a switch S2 in the first power supply circuit, wherein the switch S2 is used for switching on and off the first power supply circuit; if the voltage of the output end of the first power supply circuit is equal to the voltage of the second end, judging that the diode D3 has short circuit;
The power electronic device PEU of the vehicle is turned off based on any one of the following conditions: the first power supply circuit is not normally operated, or the second power supply circuit is not normally operated, or the count value is greater than a preset threshold, or the switch S2 of the first power supply circuit is short-circuited, or the diode D3 is short-circuited,
The first switch S4 is disposed between the second power supply circuit and the diode D3, and enabled by the microprocessor, a first end of two ends of the first switch S4 is connected to the second power supply circuit, and a second end of two ends of the first switch S4 is connected to the diode D3; the diode D3 is connected between the second terminal of the first switch S4 and the output terminal of the first power supply circuit.
14. The handover method of claim 13, further comprising, after the third step:
fourth step: judging whether the microprocessor is abnormally powered down, and enabling the first power supply circuit to work under the condition that the judging result is that the microprocessor is abnormally powered down.
15. A computer readable medium having a computer program stored thereon, characterized in that,
The computer program, when executed by a processor, implements the handover method of claim 13 or 14.
16. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the switching method of claim 13 or 14 when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515083.0A CN110228395B (en) | 2019-06-14 | 2019-06-14 | Dual power supply circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515083.0A CN110228395B (en) | 2019-06-14 | 2019-06-14 | Dual power supply circuit system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110228395A CN110228395A (en) | 2019-09-13 |
| CN110228395B true CN110228395B (en) | 2024-04-19 |
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| CN113406526B (en) * | 2020-03-17 | 2024-06-11 | 阿里巴巴集团控股有限公司 | Power supply access condition detection method and device |
| CN111267617B (en) * | 2020-03-30 | 2023-05-30 | 郑州智驱科技有限公司 | Power management system and control method based on five-in-one motor controller |
| CN112485725B (en) * | 2020-10-21 | 2022-10-28 | 惠州市德赛西威汽车电子股份有限公司 | Device and method for detecting power line state of vehicle-mounted entertainment and instrument system |
| CN112895902B (en) * | 2021-02-07 | 2022-08-19 | 中国第一汽车股份有限公司 | Power distribution system, control method of power distribution system and new energy automobile |
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