A vehicle-mounted redundant power supply and new energy vehicle

Abstract

The present invention discloses a vehicle-mounted redundant power supply and a new energy vehicle, wherein a 12V battery is connected to a first-level distribution box; the first-level distribution box is connected to a DCDC converter; a spare 12V battery is connected to a second-level distribution box; the second-level distribution box is connected to a DCDC converter; the DCDC converter is connected to a high-voltage power battery; the first and second-level distribution boxes are respectively connected to the first-level distribution box and the second-level distribution box; the first-level distribution box and the second-level distribution box are used to supply power to VDC, ADC, EPS, IPB and BCM, as well as high-power loads; the first and second-level distribution boxes are used to supply power to low-power loads. The technical content disclosed in the present invention ensures that when a power system fails during the automatic driving process, driving safety will not be affected, and even under the most serious fault level, it can still be ensured that the vehicle can drive safely for a period of time within a certain period of time, thereby ensuring driving safety.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and more specifically, to a vehicle-mounted redundant power supply and a new energy vehicle. Background Art

[0002] With the research on L3 and above autonomous driving technology, autonomous driving and its related modules are required to have a higher functional safety level, such as requiring backup redundancy for braking and steering functions, and backup redundancy for network communications. For the power supply system, L3 and above levels need to have redundant power supply nodes, which can be diagnosed when the power supply system fails and immediately switch to the backup power supply system to avoid single point failure in the traditional vehicle power supply system, which causes multiple functional failures of the entire vehicle. Among them, the loss of control of drive control, steering assistance, brake control and other functions can cause serious personal injury to the driver and passengers.

[0003] Technical solutions of existing technology:

[0004] 1. The power supply architecture adopts a backup 12V battery redundant power supply architecture;

[0005] 2. Redundant power supply loads still use traditional fuse protection.

[0006] Disadvantages of existing technology:

[0007] 1. When the main power supply circuit fails, it can only be powered by the backup 12V battery. Since the working current exceeds about 100A during the vehicle's driving, the backup 12V battery will run out of power in a short time, and the power supply time is short;

[0008] 2. When a problem occurs in this power supply circuit, all power supply modules connected to it must be cut off, and it is impossible to accurately diagnose a specific circuit fault. When the fault disappears, it cannot recover automatically.

[0009] Therefore, how to provide a vehicle-mounted redundant power supply and a new energy vehicle has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0010] The purpose of the present invention is to provide a vehicle-mounted redundant power supply and a new energy vehicle.

[0011] According to a first aspect of the present invention, there is provided a vehicle-mounted redundant power supply, comprising a high-voltage power battery, a DCDC converter, a 12V battery, a backup 12V battery, a first level one power distribution box, a second level one power distribution box and a first level two power distribution box;

[0012] The 12V battery is connected to the first level distribution box, and the circuit it is connected to is the first power supply circuit; the first level distribution box is connected to the DCDC converter, and the circuit it is connected to is the second power supply circuit; the backup 12V battery is connected to the second level distribution box, and the circuit it is connected to is the fourth power supply circuit; the second level distribution box is connected to the DCDC converter, and the circuit it is connected to is the third power supply circuit; the DCDC converter is connected to the high-voltage power battery; the first level distribution box is respectively connected to the first level distribution box and the second level distribution box; the first level distribution box and the second level distribution box supply power to VDC, ADC, EPS, IPB and BCM, as well as high-power loads; the first level distribution box supplies power to low-power loads.

[0013] Optionally, the 12V battery is connected to the first MOSFET and the second MOSFET in the first primary power distribution box;

[0014] When the 12V battery or the first power supply circuit fails, the monitoring circuit in the first-level distribution box accurately detects the failure of the 12V battery or the first power supply circuit, and quickly turns off the first MOSFET and the second MOSFET through the drive circuit, and the entire vehicle is powered by the DCDC converter and the backup 12V battery; when the monitoring circuit in the first-level distribution box detects that the 12V battery or the first power supply circuit recovers from a faulty state to a normal state, the first MOSFET and the second MOSFET are turned on in a short time through the drive circuit to form a path.

[0015] Optionally, the tenth MOSFET and the eleventh MOSFET in the first primary distribution box are connected to the twenty-third MOSFET in the DCDC converter;

[0016] When the second power supply circuit short-circuits, the tenth MOSFET and the eleventh MOSFET in the first-level distribution box are quickly turned off, the twenty-third MOSFET in the DCDC converter is quickly turned off, the load powered by the first-level distribution box is powered by the 12V battery, and the load powered by the second-level distribution box is powered by the DCDC converter and the backup 12V battery.

[0017] Optionally, the twenty-first MOSFET and the twenty-second MOSFET in the second primary distribution box are connected to the twenty-fourth MOSFET in the DCDC converter;

[0018] When the third power supply circuit short-circuit fails, the twenty-first MOSFET and the twenty-second MOSFET in the second-level distribution box are quickly turned off, the twenty-fourth MOSFET in the DCDC converter is quickly turned off, the load powered by the first-level distribution box is powered by the 12V battery and the DCDC converter, and the load powered by the second-level distribution box is powered by the backup 12V battery.

[0019] Optionally, the backup 12V battery is connected to the twelfth MOSFET and the thirteenth MOSFET in the second primary power distribution box;

[0020] When the backup 12V battery or the fourth power supply circuit fails, the monitoring circuit in the second-level distribution box accurately detects the short circuit fault of the backup 12V battery or the fourth power supply circuit, and quickly turns off the twelfth MOSFET and the thirteenth MOSFET through the drive circuit, and the entire vehicle is powered by the DCDC converter and the 12V battery; when the monitoring circuit in the second-level distribution box detects that the backup 12V battery or the fourth power supply circuit recovers from the fault state to the normal state, the twelfth MOSFET and the thirteenth MOSFET are turned on in a short time through the drive circuit to form a path.

[0021] Optionally, when the power supply circuits of VDC, ADC, EPS, IPB and BCM fail, the corresponding connecting switches third MOSFET, fourth MOSFET, fifth MOSFET, sixth MOSFET and seventh MOSFET in the first-level distribution box are turned off, or the corresponding connecting switches fourteenth MOSFETQ, fifteenth MOSFETQ, sixteenth MOSFETQ, seventeenth MOSFETQ and eighteenth MOSFETQ in the second-level distribution box are turned off; when the power supply circuits corresponding to VDC, ADC, EPS, IPB and BCM recover from the fault state to the normal state, the corresponding connecting switches are turned on in a short time.

[0022] Optionally, when the DCDC converter fails, the first-level distribution box turns off the tenth MOSFET and the eleventh MOSFET, the second-level distribution box turns off the twenty-first MOSFET and the twenty-second MOSFET, the load powered by the first-level distribution box is powered by a 12V battery, and the load powered by the second-level distribution box is powered by a backup 12V battery.

[0023] According to a second aspect of the present invention, there is provided a new energy vehicle, comprising the on-board redundant power supply as described in any one of the first aspect of the present invention.

[0024] The technical content disclosed in the present invention has the following beneficial effects: ensuring that when the power supply system fails, driving safety will not be affected, and even under the most serious fault level, it can still be guaranteed that the vehicle can drive safely for a period of time within a certain period of time, thereby ensuring driving safety.

[0025] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0027] Figure 1 The present invention is a schematic diagram of a vehicle-mounted redundant power supply provided according to an embodiment.

[0028] Explanation of the figure marks: 1-first power supply circuit, 2-second power supply circuit, 3-third power supply circuit, 4-fourth power supply circuit, IDU_1-first level distribution box, IDU_2-second level distribution box, IDU_3-first level distribution box, Q1-first MOSFET, Q2-second MOSFET, Q3-third MOSFET, Q4-fourth MOSFET, Q5-fifth MOSFET, Q6-sixth MOSFET, Q7-seventh MOSFET, Q8-eighth MOSFET, Q9-ninth MOSFET, Q10-tenth MOSFET, Q11-eleventh MOSFET, Q12-twelfth MOSFET, Q13-thirteenth MOSFET, Q14-fourteenth MOSFET, Q15-fifteenth MOSFET, Q16-sixteenth MOSFET, Q17-seventeenth MOSFET, Q18-eighteenth MOSFET, Q19-nineteenth MOSFET, Q20-twentieth MOSFET, Q21-twenty-first MOSFET, Q22-twenty-second MOSFET, Q23-twenty-third MOSFET, Q24-twenty-fourth MOSFET. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] According to a first aspect of the present invention, Figure 1 As shown, a vehicle-mounted redundant power supply is provided, including a high-voltage power battery, a DCDC converter, a 12V battery, a backup 12V battery, a first level distribution box IDU_1, a second level distribution box IDU_2 and a first level distribution box IDU_3;

[0035] The 12V battery is connected to the first-level distribution box IDU_1, and the circuit it is connected to is the first power supply circuit 1; the first-level distribution box IDU_1 is connected to the DCDC converter, and the circuit it is connected to is the second power supply circuit 2; the backup 12V battery is connected to the second-level distribution box IDU_2, and the circuit it is connected to is the fourth power supply circuit 4; the second-level distribution box IDU_1 is connected to the DCDC converter, and the circuit it is connected to is the third power supply circuit 3; the DCDC converter is connected to the high-voltage power battery; the first-level distribution box IDU_3 is respectively connected to the first-level distribution box IDU_1 and the second-level distribution box IDU_2; the first-level distribution box IDU_1 and the second-level distribution box IDU_2 supply power to VDC, ADC, EPS, IPB and BCM, as well as high-power loads; the first-level distribution box IDU_3 supplies power to low-power loads.

[0036] In some embodiments, the first-level distribution box IDU_3 is connected to the ninth MOSFET Q9 in the first-level distribution box IDU_1; the first-level distribution box IDU_3 is connected to the twentieth MOSFET Q20 in the second-level distribution box IDU_2.

[0037] The high-power load cooling fan is connected to the eighth MOSFET Q8 in the first-level distribution box IDU_1; the high-power load blower is connected to the nineteenth MOSFET Q19 in the second-level distribution box IDU_2.

[0038] In some embodiments, the 12V battery is connected to the first MOSFETQ1 and the second MOSFETQ2 in the first primary distribution box IDU_1;

[0039] When a fault occurs in the 12V battery or the first power supply circuit 1, the monitoring circuit in the first level distribution box IDU_1 accurately detects the fault in the 12V battery or the first power supply circuit 1, and quickly turns off the first MOSFET Q1 and the second MOSFETQ2 through the drive circuit, and the entire vehicle is powered by the DCDC converter and the backup 12V battery; when the monitoring circuit in the first level distribution box IDU_1 detects that the 12V battery or the first power supply circuit 1 recovers from a faulty state to a normal state, the first MOSFET Q1 and the second MOSFETQ2 are turned on in a short time through the drive circuit to form a path.

[0040] The tenth MOSFET Q10 and the eleventh MOSFET Q11 in the first primary distribution box IDU_1 are connected to the twenty-third MOSFET Q23 in the DCDC converter;

[0041] When the second power supply loop 2 short-circuit fails, the tenth MOSFET Q10 and the eleventh MOSFET Q11 in the first-level distribution box IDU_1 are quickly turned off, the twenty-third MOSFET Q23 in the DCDC converter is quickly turned off, the load powered by the first-level distribution box IDU_1 is powered by the 12V battery, and the load powered by the second-level distribution box IDU_2 is powered by the DCDC converter and the backup 12V battery.

[0042] The twenty-first MOSFET Q21 and the twenty-second MOSFET Q22 in the second primary distribution box IDU_2 are connected to the twenty-fourth MOSFET Q24 in the DCDC converter;

[0043] When the third power supply circuit 3 short-circuit fails, the twenty-first MOSFETQ21 and the twenty-second MOSFETQ22 in the second-level distribution box IDU_2 are quickly turned off, and the twenty-fourth MOSFET Q24 in the DCDC converter is quickly turned off, and the load powered by the first-level distribution box IDU_1 is jointly powered by the 12V battery and the DCDC converter, and the load powered by the second-level distribution box IDU_2 is powered by the backup 12V battery.

[0044] The backup 12V battery is connected to the twelfth MOSFET Q12 and the thirteenth MOSFET Q13 in the second primary distribution box IDU_2;

[0045] When the backup 12V battery or the fourth power supply circuit 4 fails, the monitoring circuit in the second-level distribution box IDU_2 accurately detects the short circuit fault of the backup 12V battery or the fourth power supply circuit 4, and quickly turns off the twelfth MOSFET Q12 and the thirteenth MOSFETQ13 through the drive circuit, and the entire vehicle is powered by the DCDC converter and the 12V battery; when the monitoring circuit in the second-level distribution box IDU_2 detects that the backup 12V battery or the fourth power supply circuit 4 recovers from the fault state to the normal state, the twelfth MOSFET Q12 and the thirteenth MOSFETQ13 are turned on in a short time through the drive circuit to form a path.

[0046] When the power supply circuits of VDC, ADC, EPS, IPB and BCM fail, the corresponding connection switches third MOSFETQ3, fourth MOSFETQ4, fifth MOSFETQ5, sixth MOSFETQ6 and seventh MOSFETQ7 in the first-level distribution box IDU_1 are turned off, or the corresponding connection switches fourteenth MOSFETQ14, fifteenth MOSFETQ15, sixteenth MOSFETQ16, seventeenth MOSFETQ17 and eighteenth MOSFETQ18 in the second-level distribution box IDU_2 are turned off. When the power supply circuits corresponding to VDC, ADC, EPS, IPB and BCM recover from the fault state to the normal state, the corresponding connection switches are turned on in a short time.

[0047] When the DCDC converter fails, the first-level distribution box IDU_1 turns off the tenth MOSFET Q10 and the eleventh MOSFET Q11, and the second-level distribution box IDU_2 turns off the twenty-first MOSFET Q21 and the twenty-second MOSFET Q22, and the load powered by the first-level distribution box IDU_1 is powered by the 12V battery, and the load powered by the second-level distribution box IDU_2 is powered by the backup 12V battery.

[0048] When a power supply circuit fails, the fault is graded and corresponding prompts are given according to different levels to remind the driver to take over the vehicle or take corresponding measures. The specific LEVEL is shown in Table 1:

[0049] Table 1

[0050]

[0051] According to a second aspect of the present invention, there is provided a new energy vehicle, comprising the on-board redundant power supply described in any one of the first embodiments.

[0052] In summary, the technical content disclosed in the present invention ensures that when the power system fails during automatic driving, it will not affect driving safety. Even under the most serious fault level, it can still ensure that the vehicle can drive safely for a period of time within a certain period of time, thereby ensuring driving safety. According to different fault levels, a graded reminder scheme is adopted to inform the driver of the vehicle's fault status so that he can take corresponding measures or take over the vehicle immediately.

[0053] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A vehicle-mounted redundant power supply, characterized in that: include: High-voltage power battery, DCDC converter, 12V battery, spare 12V battery, first-level distribution box, second-level distribution box and first-level distribution box; The 12V battery is connected to the first primary distribution box, and the circuit connected to it is the first power supply circuit; the first primary distribution box is connected to the DCDC converter, and the circuit connected to it is the second power supply circuit; the backup 12V battery is connected to the second primary distribution box, and the circuit connected to it is the fourth power supply circuit; the second primary distribution box is connected to the DCDC converter, and the circuit connected to it is the third power supply circuit; the DCDC converter is connected to the high-voltage power battery; the first secondary distribution box is connected to the first primary distribution box and the second primary distribution box respectively; The first level distribution box and the second level distribution box provide power for VDC, ADC, EPS, IPB and BCM, as well as high power loads; The first and second level distribution boxes supply power to low power loads; The 12V battery is connected to the first MOSFET and the second MOSFET in the first primary distribution box; When the 12V battery or the first power supply circuit fails, the monitoring circuit in the first level distribution box accurately detects the failure of the 12V battery or the first power supply circuit, and quickly turns off the first MOSFET and the second MOSFET through the drive circuit, and the whole vehicle is powered by the DCDC converter and the backup 12V battery; when the monitoring circuit in the first level distribution box detects that the 12V battery or the first power supply circuit recovers from the fault state to the normal state, the first MOSFET and the second MOSFET are turned on through the drive circuit to form a path; The tenth MOSFET and the eleventh MOSFET in the first primary distribution box are connected to the twenty-third MOSFET in the DCDC converter; When the second power supply circuit short-circuits, the tenth MOSFET and the eleventh MOSFET in the first level distribution box are turned off, the twenty-third MOSFET in the DCDC converter is quickly turned off, the load powered by the first level distribution box is powered by the 12V battery, and the load powered by the second level distribution box is powered by the DCDC converter and the backup 12V battery; The twenty-first MOSFET and the twenty-second MOSFET in the second primary distribution box are connected to the twenty-fourth MOSFET in the DCDC converter; When the third power supply circuit short-circuits, the twenty-first MOSFET and the twenty-second MOSFET in the second-level distribution box are quickly turned off, the twenty-fourth MOSFET in the DCDC converter is quickly turned off, the load powered by the first-level distribution box is powered by the 12V battery and the DCDC converter, and the load powered by the second-level distribution box is powered by the backup 12V battery; The backup 12V storage battery is connected to the twelfth MOSFET and the thirteenth MOSFET in the second primary power distribution box; When the backup 12V battery or the fourth power supply circuit fails, the monitoring circuit in the second-level power distribution box accurately detects the short circuit fault of the backup 12V battery or the fourth power supply circuit, and quickly turns off the twelfth MOSFET and the thirteenth MOSFET through the drive circuit, and the whole vehicle is powered by the DCDC converter and the 12V battery; when the monitoring circuit in the second-level power distribution box detects that the backup 12V battery or the fourth power supply circuit recovers from the fault state to the normal state, the twelfth MOSFET and the thirteenth MOSFET are turned on in a short time through the drive circuit to form a path; When the power supply circuits of VDC, ADC, EPS, IPB and BCM fail, the corresponding connection switches 3rd MOSFET, 4th MOSFET, 5th MOSFET, 6th MOSFET and 7th MOSFET in the first level distribution box are turned off, or the corresponding connection switches 14th MOSFETQ, 15th MOSFETQ, 16th MOSFETQ, 17th MOSFETQ and 18th MOSFETQ in the second level distribution box are turned off. When the power supply circuits corresponding to VDC, ADC, EPS, IPB and BCM recover from the fault state to the normal state, the corresponding connection switches are turned on; When the DCDC converter fails, the first level distribution box turns off the tenth MOSFET and the eleventh MOSFET, the second level distribution box turns off the twenty-first MOSFET and the twenty-second MOSFET, the load powered by the first level distribution box is powered by the 12V battery, and the load powered by the second level distribution box is powered by the backup 12V battery; When a power supply circuit fails, the fault is graded and corresponding prompts are given according to different levels to remind the driver to take over the vehicle or take corresponding measures: There are three levels of faults: level 1 fault, level 2 fault and level 3 fault: The first level fault is: if one or more of the 12V battery fault, backup 12V battery fault, first power supply circuit fault or fourth power supply circuit fault occurs, the 12V battery fault light of the combination instrument will be on; The second level fault is: if only one of the two power supplies of VDC, ADC, EPS, IPB or BCM fails, the corresponding module fault light will be lit in the instrument cluster, and the text prompt "Unable to enter automatic driving mode" will be displayed; The third level fault is: DCDC converter failure, then the DCDC system fault light in the instrument cluster continues to flash, and the text prompts "Power system failure, please take over the vehicle immediately"; The MP5 voice broadcasts once "Power system failure, please take over the vehicle immediately".

2. A new energy vehicle, characterized in that: Including the vehicle-mounted redundant power supply as described in claim 1.

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