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CN-121973627-A - Power distribution system, control method of power distribution system and vehicle

CN121973627ACN 121973627 ACN121973627 ACN 121973627ACN-121973627-A

Abstract

The embodiment of the invention relates to the technical field of low-voltage power supply, and discloses a power distribution system, a control method of the power distribution system and a vehicle, wherein in the power distribution system, a first conversion circuit and a second conversion circuit are both coupled with a power battery to convert initial voltage output by the power battery into first voltage, a third conversion circuit is coupled with the power battery to convert the initial voltage output by the power battery into second voltage, the first type of load is coupled to the first conversion circuit and is powered from the first conversion circuit, the second type of load is coupled to the first conversion circuit and the second conversion circuit and is powered from the first conversion circuit and/or the second conversion circuit, the third type of load is coupled to the third conversion circuit and is powered from the third conversion circuit, the working voltages of the first type of load and the second type of load are the first voltage, and the working voltage of the third type of load is the second voltage. By applying the technical scheme of the invention, the load with different voltages can be compatible, redundant power supply branches can be provided for the load, and the safety of the vehicle is ensured.

Inventors

  • DU MINGJIAN
  • LU GUOCHENG
  • ZHOU HONGBO
  • ZHANG QIAN

Assignees

  • 深蓝汽车科技有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (12)

  1. 1. A power distribution system, comprising: A power cell (100); a first conversion circuit (201) and a second conversion circuit (202), both coupled to the power cell (100), configured to convert an initial voltage output by the power cell (100) into a first voltage; A third conversion circuit (203) coupled to the power battery (100) and configured to convert an initial voltage output by the power battery (100) into a second voltage; -a first type of load (301) coupled to the first conversion circuit (201), taking power from the first conversion circuit (201); -a second type of load (302) coupled to said first conversion circuit (201) and to said second conversion circuit (202), taking power from said first conversion circuit (201) and/or said second conversion circuit (202); a third type of load (601) coupled to the third conversion circuit (203), the third conversion circuit (203) being powered; The working voltages of the first type of load (301) and the second type of load (302) are the first voltage, and the working voltage of the third type of load (601) is the second voltage.
  2. 2. The power distribution system of claim 1, further comprising: A battery (400) coupled to the first conversion circuit (201) and configured to supply power to the second type of load (302) when there is a fault in the first conversion circuit (201) and the second conversion circuit (202).
  3. 3. The power distribution system of claim 2, further comprising: A fourth conversion circuit (501), coupled to the first conversion circuit (201), configured to convert the first voltage to a second voltage; -a fourth type of load (602) coupled to the third conversion circuit (203) and the fourth conversion circuit (501), taking power from the third conversion circuit (203) and/or the fourth conversion circuit (501); wherein the operating voltage of the fourth type of load (602) is the second voltage.
  4. 4. The power distribution system of claim 3, wherein the fourth type of load (602) is further configured to draw power from the first conversion circuit (201) and/or the second conversion circuit (202) through the fourth conversion circuit (501).
  5. 5. The power distribution system of claim 3 or 4, wherein, The battery (400), coupled to the first conversion circuit (201), the second conversion circuit (202) and the fourth conversion circuit (501), is further configured to supply power to the fourth type of load (602) through the fourth conversion circuit (501) when there is a fault in the first conversion circuit (201) and the second conversion circuit (202).
  6. 6. The power distribution system of claim 5, further comprising: A first switch (K1) coupled between the first conversion circuit (201) and the first type of load (301) and the second type of load (302); -a control circuit (700) configured to control the first switch (K1) to open and to control the power battery (100) to supply power to the second type of load (302) via the second conversion circuit (202) and to control the power battery (100) to supply power to the third type of load (601) and the fourth type of load (602) via the third conversion circuit (203) when the first conversion circuit (201) fails.
  7. 7. The power distribution system of claim 6, further comprising: -a second switch (K2) coupled between the second conversion circuit (202) and the second type of load (302); the control circuit (700) is further configured to control the second switch (K2) to be turned off and control the power battery (100) to supply power to the first type of load (301) and the second type of load (302) through the first conversion circuit (201) and control the power battery (100) to supply power to the third type of load (601) and the fourth type of load (602) through the third conversion circuit (203) when the second conversion circuit (202) has a fault.
  8. 8. The power distribution system of claim 6, further comprising: A third switch (K3) coupled between the third conversion circuit (203) and the third type of load (601) and the fourth type of load (602); the control circuit (700) is further configured to control the third switch (K3) to be turned off and control the power battery (100) to supply power to the first type of load (301) and the second type of load (302) through the first conversion circuit (201), to supply power to the second type of load (302) through the second conversion circuit (202), and to supply power to the fourth type of load (602) through the fourth conversion circuit (501) when the third conversion circuit (203) has a fault.
  9. 9. The power distribution system of claim 7, further comprising: a fourth switch (K4) coupled between the fourth conversion circuit (501) and the fourth type of load (602); The control circuit (700) is further configured to control the storage battery (400) to supply power to the second type of load (302) and control the power battery (100) to supply power to the third type of load (601) and the fourth type of load (602) through the third conversion circuit (203) when the first conversion circuit (201) and the second conversion circuit (202) have faults; When the first conversion circuit (201), the second conversion circuit (202) and the third conversion circuit (203) have faults, the fourth switch (K4) is controlled to be closed, the storage battery (400) is controlled to supply power to the second type of load (302), and the fourth type of load (602) is controlled to supply power through the fourth conversion circuit (501).
  10. 10. The power distribution system of claim 9, further comprising: a fifth switch (K5) coupled between the first switch (K1) and the fourth conversion circuit (501); A sixth switch (K6) coupled between the second switch (K2) and the fourth conversion circuit (501); The control circuit (700) is further configured to control the fourth switch (K4), the fifth switch (K5) and the sixth switch (K6) to be turned off when there is a fault in the fourth conversion circuit (501).
  11. 11. A method of controlling a power distribution system, comprising: The method comprises the steps of acquiring working states of a plurality of conversion circuits, wherein the plurality of conversion circuits comprise a first conversion circuit, a second conversion circuit, a third conversion circuit and a fourth conversion circuit, and the second conversion circuit and the fourth conversion circuit are redundant conversion circuits; and controlling the power battery to supply power to the load through at least one conversion circuit in the plurality of conversion circuits according to the working state.
  12. 12. A vehicle comprising a power distribution system as set forth in any one of claims 1-10.

Description

Power distribution system, control method of power distribution system and vehicle Technical Field The invention relates to the technical field of low-voltage power supply, in particular to a power distribution system, a control method of the power distribution system and a vehicle. Background Along with the comprehensive transformation of the automobile industry to electric and intelligent, the quantity of low-voltage loads integrated in the vehicle is increased rapidly, the transformation of a whole low-voltage framework from 12V to 48V is promoted, and in order to achieve the goals of light weight, high efficiency and low cost, a 12V and 48V coexistence scheme is adopted in the current vehicle. In the related art, a bidirectional direct current converter is arranged between a 48V power supply branch and a 12V power supply branch so as to provide redundant power supply branches for loads and meet the safety requirements of vehicles. However, the bidirectional direct current converter is arranged to provide redundant branches for loads, so that the technical problem of power mismatch exists. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a power distribution system, a control method of the power distribution system and a vehicle, which are aimed at solving the technical problems of power mismatch caused by the arrangement of a bidirectional direct current converter, the provision of redundant branches for loads in the prior art. In a first aspect, an embodiment of the present application provides a power distribution system, including a power battery, a first conversion circuit, a second conversion circuit, a third conversion circuit, a first type load, a second type load, and a third type load, where the first conversion circuit and the second conversion circuit are each coupled to the power battery and configured to convert an initial voltage output by the power battery into a first voltage, the third conversion circuit is coupled to the power battery and configured to convert the initial voltage output by the power battery into a second voltage, the first type load is coupled to the first conversion circuit and configured to draw power from the first conversion circuit, the second type load is coupled to the first conversion circuit and the second conversion circuit and configured to draw power from the first conversion circuit and/or the second conversion circuit, the third type load is coupled to the third conversion circuit and configured to draw power from the third conversion circuit, and wherein an operating voltage of the first type load and the second type load is the first voltage, and an operating voltage of the third type load is the second voltage. The power distribution system realizes double improvement of power supply reliability and flexibility through a multi-conversion circuit and multi-load type partition power supply architecture. For loads with different voltage demands, the system adopts independent conversion circuits to accurately supply power, the first type of loads are supplied with power by the first conversion circuit, the second type of loads can be supplied with power by the first conversion circuit and the second conversion circuit through double power supply branches, and the third type of loads are independently supplied with power by the third conversion circuit. The power distribution system provided by the application can avoid complex coupling of voltage conversion links, and can optimize power distribution efficiency through partition management. According to the embodiment of the application, through the layered and domain-divided power supply strategy, the system ensures the power supply continuity of the key load, meanwhile, realizes flexible adaptation to diversified load demands, and effectively improves the overall power supply efficiency and system compatibility. In some embodiments, the power distribution system further includes a battery coupled to the first conversion circuit and configured to supply power to the second type of load when there is a fault in the first conversion circuit and the second conversion circuit. The power distribution system provides main power supply redundancy for the second type of load through the parallel connection of the double conversion circuits, and is matched with a standby power supply of a storage battery to construct a three-level power supply guarantee system. The double conversion circuits can realize mutual backup and power sharing of the main power supply paths, and the storage battery starts emergency power supply when the first conversion circuit and the second conversion circuit are invalid, so that a multi-level fault isolation mechanism is formed. The power supply continuity of the key load can be guaranteed, and the power distribution efficiency can be optimized. The power distribution system is applied to a vehicle, can realize