A power supply system, an electrical system assembly, and a vehicle

Abstract

The embodiment of the present application provides a power supply system, an electrical system assembly and a vehicle, which adopts a high-voltage direct-current converter, a first power distribution device and a battery assembly to form a low-voltage primary main power grid, adopts the high-voltage direct-current converter, a second power distribution device and the battery assembly to form a low-voltage primary auxiliary power grid. Two low-voltage primary power grids are provided with only one power supply with a voltage value of a first voltage value. The first power distribution port is used to supply power to a power consumption device with a working voltage of the first voltage value. The first direct-current voltage converter arranged in the first power distribution device and the second direct-current voltage converter arranged in the second power distribution device are used to output direct-current with a second voltage value, so as to form two low-voltage secondary power grids. Therefore, in the power supply system with two power sources, a low-voltage primary power grid corresponding to the second voltage value and a redundant power supply device associated with the primary power grid do not need to be additionally increased.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply system, an electrical system assembly, and a vehicle. Background Technology

[0002] Currently, in order to improve the reliability and fault tolerance of the power supply system, redundant power supplies are usually configured in the power supply system. When the main power supply fails, the redundant power supply can be switched on to avoid equipment shutdown, data loss and other situations caused by power outage.

[0003] However, in a power supply system with at least two power sources, the power grids corresponding to each power source are independent of each other. If a redundant power grid is required, the number of power grids and redundant power supply devices will increase significantly, resulting in a complex power supply system structure. Utility Model Content

[0004] This application provides a power supply system, an electrical system assembly, and a vehicle, aiming to improve the problem that in power supply systems with at least two power sources, it is necessary to increase the number of power grids and redundant power supply devices for each power source, resulting in a complex system structure.

[0005] A utility model provides a power supply system, the power supply system comprising:

[0006] A high-voltage direct current converter, wherein the high-voltage direct current converter outputs direct current at a first voltage value;

[0007] A first power distribution device, wherein a first voltage input terminal of the first power distribution device is coupled to the output terminal of the high voltage DC converter, and the first power distribution device includes at least one first power distribution port that outputs a first voltage value;

[0008] The second power distribution device has a first voltage input terminal coupled to the output terminal of the high voltage DC converter, and the second power distribution device includes at least one first power distribution port that outputs a first voltage value.

[0009] A battery assembly, wherein the battery assembly is coupled to the second voltage input terminal of the first power distribution device and to the second voltage input terminal of the second power distribution device; and...

[0010] The first power distribution device includes at least a first DC voltage converter, the voltage input terminal of the first DC voltage converter is coupled to the voltage input terminal of the first power distribution device, and is used to convert DC power of a first voltage value into DC power of a second voltage value. The first DC voltage converter includes at least one second power distribution port that outputs the second voltage value.

[0011] The second power distribution device includes at least a second DC voltage converter, the input terminal of which is coupled to the output terminal of the high voltage DC converter to convert DC power of a first voltage value into DC power of a second voltage value. The second DC voltage converter includes at least one second power distribution port that outputs the second voltage value.

[0012] This invention employs a high-voltage DC-DC converter, a first power distribution unit, and a battery pack to form a low-voltage primary main power grid, and a high-voltage DC-DC converter, a second power distribution unit, and a battery pack to form a low-voltage primary secondary power grid. Both low-voltage primary power grids are equipped with only one power supply with a first voltage value. Power is supplied to electrical equipment operating at the first voltage value through a first power distribution port. A second voltage value DC power is output through a first DC-DC converter in the first power distribution unit and a second DC-DC converter in the second power distribution unit, thus forming two low-voltage secondary power grids. Therefore, in a power supply system with two power sources, there is no need to add an extra low-voltage primary power grid corresponding to the second voltage value or redundant power supply devices associated with the primary power grid. This simplifies the power supply system structure and reduces system weight and cost.

[0013] An optional utility model includes a battery assembly comprising a first battery module, the first battery module being coupled to a second voltage input terminal of the first power distribution device and to a second voltage input terminal of the second power distribution device.

[0014] In this invention, in the event of a fault in the connection line between the high-voltage DC converter and the first power distribution device, and / or the connection line between the high-voltage DC converter and the second power distribution device, the first battery module can be replaced to supply power to one of the low-voltage primary main grid and the low-voltage primary secondary grid. This further reduces the structural complexity of the power supply system and improves the operational stability of the downstream circuits or electrical equipment of the first or second power distribution device.

[0015] An optional utility model embodiment includes the battery assembly comprising:

[0016] The first battery module is coupled to the second voltage input terminal of the first power distribution device;

[0017] The second battery module is coupled to the second voltage input terminal of the second power distribution device.

[0018] In this invention, if the high-voltage DC converter, or the connection line between the high-voltage DC converter and the first power distribution device, fails, the first battery module can be replaced to provide power, thereby improving the operational stability of the downstream circuits or electrical equipment of the first power distribution device. Similarly, if the high-voltage DC converter, or the connection line between the high-voltage DC converter and the second power distribution device, fails, the second battery module can be replaced to provide power, further improving the operational stability of the downstream circuits or electrical equipment of the second power distribution device. Alternating operation of the first and second battery modules evenly distributes the charge and discharge cycles of the battery modules, thereby extending the service life of the power supply system.

[0019] In one optional utility model embodiment, at least one first distribution port of the first power distribution device and at least one first distribution port of the second power distribution device are used to supply power to the same electrical device; and / or,

[0020] At least one second power distribution port of the first DC voltage converter and at least one second power distribution port of the second DC voltage converter are used to power the same electrical device.

[0021] In this invention, in the event of a power outage in the primary low-voltage grid, the secondary low-voltage grid can be activated to supply power to the equipment supplied by the primary grid. The combination of power redundancy in the battery pack and the secondary low-voltage grid significantly improves the operational stability of the equipment. Similarly, in the event of a power outage in the primary low-voltage grid, the secondary low-voltage grid can be activated to supply power to the equipment supplied by the secondary grid. Thus, the combination of power redundancy in the battery pack and the secondary low-voltage grid further enhances the operational stability of the equipment.

[0022] In one optional utility model, the power supply system further includes a regional control unit, wherein a first voltage input terminal of the regional control unit is coupled to one of the second power distribution ports of the first DC voltage converter, and a second voltage input terminal of the regional control unit is coupled to one of the second power distribution ports of the second DC voltage converter, so as to supply power to the regional control unit through one of the first DC voltage converter and the second DC voltage converter.

[0023] In this invention, when the voltage input of the first DC voltage converter fails, the system can switch to the second DC voltage converter for voltage input. Alternatively, when the voltage input of the second DC voltage converter fails, the system can switch to the first DC voltage converter for voltage input. This improves the power supply safety level of the area control unit and consequently enhances the operational stability of the equipment powered by the area control unit.

[0024] In one optional utility model, the first DC voltage converter is a bidirectional DC-DC converter.

[0025] In this invention, when the first DC-DC voltage converter is a bidirectional DC-DC converter, the voltage surges generated during operation by electrical equipment with a second operating voltage can be reversed by the first DC-DC voltage converter and input into the low-voltage primary main grid. The voltage surges and fluctuations are then absorbed by the first battery module. This stabilizes the voltage of the low-voltage secondary main grid and improves the power supply stability of the power supply system.

[0026] In one optional utility model, the second DC voltage converter is a bidirectional DC-DC converter.

[0027] In this invention, when the second DC-DC voltage converter is a bidirectional DC-DC converter, the voltage surges generated during operation by electrical equipment with a second operating voltage value can be reversed by the second DC-DC voltage converter and input into the low-voltage primary secondary power grid. The second battery module then absorbs the voltage surges and fluctuations. This stabilizes the voltage value of the low-voltage secondary secondary power grid, further improving the power supply stability of the power supply system.

[0028] In one optional embodiment, up to two high-voltage DC converters are provided, with the first power distribution device and the second power distribution device respectively coupled to the output terminal of the same high-voltage DC converter; or,

[0029] The first power distribution device is coupled to the output terminal of the first high-voltage DC converter, and the second power distribution device is coupled to the output terminal of the second high-voltage DC converter.

[0030] In this invention, the high-voltage direct current (HVDC) converters in the low-voltage primary main grid and the low-voltage primary auxiliary grid are shared. When only one HVDC converter is installed, it simultaneously outputs DC power of a first voltage value to both the low-voltage primary main grid and the low-voltage primary auxiliary grid. By sharing the HVDC converter between the low-voltage primary main grid and the low-voltage primary auxiliary grid, the power supply security of the power supply system can be improved while reducing the number of HVDC converters. This simplifies the structural complexity of the power supply system and reduces its weight and cost.

[0031] The high-voltage direct current (HVDC) converters in the low-voltage primary main grid and the low-voltage primary secondary grid are installed separately. With two HVDC converters, the first converter outputs DC power of a first voltage value to the low-voltage primary main grid, and the second converter outputs DC power of the first voltage value to the low-voltage primary secondary main grid. By employing different HVDC converter structures for the low-voltage primary main grid and the low-voltage primary secondary grid, the power supply stability of both grids can be avoided simultaneously if one HVDC converter fails.

[0032] In one optional utility model, the power supply system further includes a first bidirectional disconnect switch, which is coupled between a first voltage input terminal of the first power distribution device and a first voltage input terminal of the second power distribution device.

[0033] In this invention, the connection between the low-voltage primary main grid and the low-voltage secondary grid can be adjusted by setting the first bidirectional disconnect switch. For example, if a fault occurs in either the primary grid or the secondary grid, the load supplied by the faulty grid can be transferred to the normally operating grid, thereby ensuring the power supply stability of the equipment. Furthermore, based on the needs of the equipment, power can be supplied to a single primary grid, from the primary grid to the secondary grid. When supplying power to a single grid, the primary and secondary grids can be completely isolated when the first bidirectional disconnect switch is in the off state. Alternatively, the first bidirectional disconnect switch can be in the on state to achieve parallel power supply to the two grids. This improves the power supply efficiency and enriches the power supply modes of the power supply system; and / or,

[0034] The power supply system further includes a second bidirectional disconnect switch, which is coupled between the high-voltage DC converter and the first voltage input terminal of the first power distribution device; and / or

[0035] The power supply system also includes a third bidirectional disconnect switch, which is coupled between the high-voltage DC converter and the first voltage input terminal of the second power distribution device.

[0036] In this invention, when the high-voltage DC converter malfunctions, or when the connection line between the high-voltage DC converter and the first voltage input terminal of the first power distribution device malfunctions, the second bidirectional disconnect switch can be opened to isolate the faulty line from the low-voltage primary main power grid, thereby preventing further escalation of the fault. Similarly, when the high-voltage DC converter malfunctions, or when the connection line between the high-voltage DC converter and the first voltage input terminal of the second power distribution device malfunctions, the third bidirectional disconnect switch can be opened to isolate the faulty line from the low-voltage primary secondary power grid, thereby preventing further escalation of the fault.

[0037] In one optional utility model, the power supply system further includes a first unidirectional disconnect switch, which is coupled between the battery assembly and the second voltage input terminal of the first power distribution device, so that the current in the battery assembly flows unidirectionally into the first power distribution device.

[0038] In this invention, the first one-way disconnect switch is provided so that the current in the battery assembly flows unidirectionally into the first power distribution device, preventing the current in the first power distribution device from flowing back into the battery assembly, thereby protecting the battery assembly.

[0039] In one optional utility model, the power supply system further includes a second unidirectional disconnect switch, which is coupled between the battery assembly and the second voltage input terminal of the second power distribution device, so that the current in the battery assembly flows unidirectionally into the second power distribution device.

[0040] In this invention, the second unidirectional disconnect switch is coupled between the battery assembly and the second voltage input terminal of the second power distribution device, which allows the current in the battery assembly to flow unidirectionally into the second power distribution device, preventing the current in the second power distribution device from flowing back into the battery assembly, thereby protecting the battery assembly.

[0041] In one optional utility model, the power supply system further includes a third unidirectional disconnect switch, which is disposed at the first power distribution port.

[0042] In this invention, the third unidirectional disconnect switch is located at the first power distribution port, which can prevent the current in the electrical load from flowing back into the first power distribution device or the second power distribution device, thereby protecting at least one of the first power distribution device and the second power distribution device.

[0043] An optional utility model provides an electrical system assembly, the electrical system assembly comprising:

[0044] The power supply system as described in any one of the above utility models;

[0045] Electrical equipment, which is electrically connected to the power supply system to be powered by the power supply system.

[0046] In this invention, the electrical system assembly with the aforementioned power supply system can consist of a low-voltage primary main grid composed of a high-voltage DC-DC converter, a first power distribution device, and a battery pack, and a low-voltage primary secondary grid composed of a high-voltage DC-DC converter, a second power distribution device, and a battery pack. Each of the two low-voltage primary grids has only one power supply with a first voltage value. Power is supplied to the equipment operating at the first voltage value through the first power distribution port. A second voltage value DC power is output through a first DC-DC converter in the first power distribution device and a second DC-DC converter in the second power distribution device, thus forming two low-voltage secondary grids. Therefore, in a power supply system with two power sources, it is not necessary to add an additional low-voltage primary grid corresponding to the second voltage value or redundant power supply devices associated with the primary grid. That is, it is not necessary to add high-voltage DC-DC converters corresponding to voltage values ​​other than the first voltage value and battery packs for redundant power supply. Through the hierarchical arrangement of the power supply network, the structure of the high-voltage DC-DC converters and battery modules required for the two different power supplies is shared. This simplifies the structure of the electrical system assembly, reduces its weight and cost, and facilitates the placement of the power supply system within the electrical system assembly.

[0047] An optional utility model provides a vehicle that includes an electrical system assembly as described above.

[0048] In this invention, a low-voltage primary main power grid is composed of a high-voltage DC-DC converter, a first power distribution device, and a battery assembly, while a low-voltage secondary primary power grid is composed of a high-voltage DC-DC converter, a second power distribution device, and a battery assembly. Both low-voltage primary power grids are equipped with only one power supply with a first voltage value. Power is supplied to electrical equipment operating at the first voltage value through a first power distribution port. A second voltage value DC power is output through a first DC-DC converter in the first power distribution device and a second DC-DC converter in the second power distribution device, thus forming two low-voltage secondary power grids. Therefore, in a power supply system with two power sources, it is not necessary to add an additional low-voltage primary power grid corresponding to the second voltage value or redundant power supply devices associated with the primary power grid. That is, it is not necessary to add high-voltage DC-DC converters corresponding to voltage values ​​other than the first voltage value and battery assemblies for redundant power supply. Through the hierarchical arrangement of the power supply network, the structure of the high-voltage DC-DC converters and battery modules required for the two different power supplies is shared. This simplifies the vehicle structure, reduces vehicle weight and cost, and facilitates the arrangement of the electrical system assembly within the vehicle. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the power supply system provided in one embodiment of this application;

[0050] Figure 2 This is a schematic diagram of another power supply system provided in one embodiment of this application;

[0051] Figure 3 This is a schematic diagram of the structure of another power supply system provided in an embodiment of this application;

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. High-voltage DC converter; 2. First power distribution device; 21. First DC voltage converter; 3. Second power distribution device; 31. Second DC voltage converter; 4. Battery assembly; 41. First battery module; 42. Second battery module; 5. Area control unit; 6. First bidirectional disconnect switch; 7. Second bidirectional disconnect switch; 8. Third bidirectional disconnect switch; 9. First unidirectional disconnect switch; 10. Second unidirectional disconnect switch; 11. Third unidirectional disconnect switch; 12. Electrical equipment. Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0055] Currently, in order to improve the reliability and fault tolerance of the power supply system, redundant power supplies are usually configured in the power supply system. When the main power supply fails, the redundant power supply can be switched on to avoid equipment shutdown, data loss and other situations caused by power outage.

[0056] However, in a power supply system with at least two power sources, the power grids corresponding to each power source are independent of each other. If a redundant power grid is required, the number of power grids and redundant power supply devices will increase significantly, resulting in a complex power supply system structure.

[0057] Reference Figure 1 and Figure 2 As shown in the illustration, an embodiment of this application provides a power supply system, which may include a high-voltage DC-DC converter 1, a first power distribution device 2, a second power distribution device 3, and a battery assembly 4. The high-voltage DC-DC converter 1 outputs DC power at a first voltage value. The first voltage input terminal of the first power distribution device 2 is coupled to the output terminal of the high-voltage DC-DC converter 1, and the first power distribution device 2 includes at least one first power distribution port that outputs the first voltage value. The first voltage input terminal of the second power distribution device 3 is coupled to the output terminal of the high-voltage DC-DC converter 1, and the second power distribution device 3 includes at least one first power distribution port that outputs the first voltage value. The battery assembly 4 is coupled to a second voltage input terminal of both the first power distribution device 2 and the second voltage input terminal of the second power distribution device 3. Furthermore, the first power distribution device 2 includes at least a first DC-DC voltage converter 21, the voltage input terminal of which is coupled to the voltage input terminal of the first power distribution device 2, for converting the DC power at the first voltage value into DC power at a second voltage value. The first DC-DC voltage converter 21 includes at least one second power distribution port that outputs the second voltage value. The second power distribution device 3 includes at least a second DC voltage converter 31. The input terminal of the second DC voltage converter 31 is coupled to the output terminal of the high voltage DC converter 1 to convert DC power of a first voltage value into DC power of a second voltage value. The second DC voltage converter 31 includes at least one second power distribution port that outputs the second voltage value.

[0058] In this embodiment, the power supply system may include a high-voltage DC-DC converter 1, a first power distribution device 2, a second power distribution device 3, and a battery assembly 4. The high-voltage DC-DC converter 1 (HV-DCDC) refers to a power electronic device used to convert high-voltage DC power between different voltage levels, enabling the conversion of high-voltage DC power to DC voltages of other voltage levels. In one example, the input terminal of the high-voltage DC-DC converter 1 is coupled to a high-voltage DC power supply. By converting the voltage of the high-voltage DC power supply, the output terminal of the high-voltage DC-DC converter 1 outputs DC power at a first voltage value. For example, the first voltage value may be a low voltage of 48V.

[0059] The first power distribution device 2 can be understood as a device that distributes electrical energy from the power supply to different downstream circuits or electrical devices as needed. The first voltage input terminal of the first power distribution device 2 is coupled to the output terminal of the high-voltage DC converter 1, so that DC power of a first voltage value can be input to the first power distribution device 2 through the high-voltage DC converter 1. The first power distribution device 2 may include at least one first power distribution port that outputs the first voltage value. The first power distribution port is used to couple with an electrical device whose operating voltage is the first voltage value, thereby supplying power to the electrical device whose operating voltage is the first voltage value.

[0060] The second power distribution device 3 can be understood as a device that distributes electrical energy from the power supply to different downstream circuits or electrical devices as needed. The first voltage input terminal of the second power distribution device 3 is coupled to the output terminal of the high-voltage DC converter 1, so that DC power of a first voltage value can be input to the second power distribution device 3 through the high-voltage DC converter 1. The second power distribution device 3 may include at least one second power distribution port that outputs the first voltage value. The second power distribution port is used to couple with electrical devices operating at the first voltage value, thereby supplying power to the electrical devices operating at the first voltage value.

[0061] The battery assembly 4 can be understood as an energy storage component including at least one battery module. The battery assembly 4 is coupled to the second voltage input terminal of the first power distribution device 2 and to the second voltage input terminal of the second power distribution device 3. Therefore, in the event of a failure in the DC output of the high-voltage DC converter 1, the battery assembly 4 can supply power to the first power distribution device 2 and / or the second power distribution device 3, thereby improving the operational stability of the downstream circuits or electrical equipment of the first power distribution device 2 and / or the second power distribution device 3.

[0062] The first power distribution device 2 includes at least a first DC-DC converter 21, which is a power electronic device that converts one DC voltage level to another. The voltage input terminal of the first DC-DC converter 21 is coupled to the voltage input terminal of the first power distribution device 2. Thus, the DC voltage converted by the first DC-DC converter 21 can be output as a second voltage value. For example, the second voltage value can be 12V. In one or more embodiments, the first DC-DC converter 21 has two voltage input terminals, one of which is coupled to the output terminal of the high-voltage DC-DC converter 1, and the other is coupled to the output terminal of the first battery module 41. The first DC-DC converter 21 may include at least one second power distribution port that outputs the second voltage value. The second power distribution port is used to couple with an electrical device operating at the second voltage value, thereby supplying power to the electrical device operating at the second voltage value. Therefore, in the event of a failure in the DC output of the high-voltage DC converter 1, the first battery module 41 can be replaced to continue supplying power to the first DC voltage converter 21 located in the first power distribution device 2, allowing the electrical equipment operating at the second voltage value to continue working. This improves the operational stability of the electrical equipment.

[0063] The second power distribution device 3 includes at least a second DC-DC converter 31, which is a power electronic device that converts one DC voltage level to another. The voltage input terminal of the second DC-DC converter 31 is coupled to the voltage input terminal of the second power distribution device 3. Thus, the DC voltage converted by the second DC-DC converter 31 can be output as a second voltage value. For example, the second voltage value can be 12V. In one or more embodiments, the DC-DC converter has two voltage input terminals, one of which is coupled to the output terminal of the high-voltage DC-DC converter 1, and the other is coupled to the output terminal of the second battery module 42. The second DC-DC converter 31 may include at least one second power distribution port that outputs the second voltage value. The second power distribution port is used to couple with electrical equipment operating at the second voltage value, thereby supplying power to the electrical equipment operating at the second voltage value. Therefore, in the event of a failure in the DC output of the high-voltage DC converter 1, the second battery module 42 can be replaced to continue supplying power to the second DC voltage converter 31 located in the second power distribution device 3, allowing the electrical equipment operating at the second voltage value to continue working. This improves the operational stability of the electrical equipment.

[0064] In this embodiment of the application, the first power distribution device 2 and the second power distribution device 3 may be power distribution equipment such as smart electrical boxes.

[0065] In summary, a low-voltage primary main grid is formed using a high-voltage DC-DC converter 1, a first power distribution unit 2, and a battery pack 4. A low-voltage secondary primary grid is formed using a high-voltage DC-DC converter 1, a second power distribution unit 3, and a battery pack 4. Both low-voltage primary grids have only one power supply with a first voltage value. Power is supplied to equipment operating at the first voltage value through the first power distribution port. A second voltage value DC power is output through the first DC-DC converter 21 in the first power distribution unit 2 and the second DC-DC converter in the second power distribution unit 3, thus forming two low-voltage secondary grids. Therefore, in a power supply system with two power sources, it is not necessary to add an additional low-voltage primary grid corresponding to the second voltage value or redundant power supply devices associated with the primary grid. That is, it is not necessary to add a high-voltage DC-DC converter 1 for voltage values ​​other than the first voltage value and a battery pack 4 for redundant power supply. Through the hierarchical arrangement of the power supply network, the high-voltage DC-DC converter 1 and battery module required by the two different power supplies are shared. This simplifies the structure of the power supply system, reduces system weight and cost, and facilitates the layout of the power supply system.

[0066] Example 1

[0067] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, in one or more embodiments of this application, the battery assembly 4 includes a first battery module 41, which is coupled to the second voltage input terminal of the first power distribution device 2 and to the second voltage input terminal of the second power distribution device 3.

[0068] In this embodiment, the battery assembly 4 may include a first battery module 41, which can be understood as an energy storage module including at least one individual battery. For example, the individual battery may be a lithium battery or similar type. The first battery module 41 is coupled to the second voltage input terminal of the first power distribution device 2, thereby allowing direct current of a first voltage value to be input to the first power distribution device 2 through the first battery module 41. Furthermore, the first battery module 41 is coupled to the second voltage input terminal of the second power distribution device 3, thereby allowing direct current of a first voltage value to be input to the second power distribution device 3 through the first battery module 41. Therefore, in the event of a fault in the connection line between the high-voltage DC converter 1 and the first power distribution device 2, and / or the connection line between the high-voltage DC converter 1 and the second power distribution device 3, the first battery module 41 can be replaced to supply power to one of the low-voltage primary main grid and the low-voltage primary secondary grid. This can further reduce the structural complexity of the power supply system and improve the operational stability of the downstream circuits or electrical equipment of the first power distribution device 2 or the second power distribution device 3.

[0069] Under the aforementioned power supply system architecture, the power supply system can employ only two power sources: the first is the power supplied by the high-voltage DC converter 1, and the second is the power supplied by the first battery module 41. This achieves two different voltage outputs and power supply redundancy design, thereby significantly reducing the structural complexity of the power supply system while improving its power supply safety level.

[0070] In one or more embodiments of this application, the first DC voltage converter 21 is a bidirectional DC-DC converter.

[0071] In this embodiment, a bidirectional DC-DC converter (BDC) is a DC voltage conversion device capable of bidirectional energy flow. It can convert the DC voltage on the input side to the required DC voltage on the output side (forward operation) and can also reverse the energy from the output side back to the input side when demand reverses (reverse operation). Therefore, when the first DC voltage converter 21 is a bidirectional DC-DC converter, the surges generated during operation by electrical equipment with a second operating voltage can be reverse-converted by the first DC voltage converter 21 and input into the low-voltage primary main grid. The first battery module 41 absorbs the voltage surges and fluctuations. This stabilizes the voltage value of the low-voltage secondary main grid and improves the power supply stability of the power supply system.

[0072] In one or more embodiments of this application, the second DC voltage converter 31 is a bidirectional DC-DC converter.

[0073] In this embodiment, the bidirectional DC-DC converter is a DC voltage conversion device capable of bidirectional energy flow. It can convert the DC voltage on the input side to the required DC voltage on the output side (forward operation) and can also reverse the energy from the output side back to the input side when demand reverses (reverse operation). Therefore, when the second DC voltage converter 31 is a bidirectional DC-DC converter, the surges generated during operation by electrical equipment with a second operating voltage value can be reversed by the second DC voltage converter 31 and input to the low-voltage primary secondary grid. The second battery module 42 absorbs the voltage surges and fluctuations. This stabilizes the voltage value of the low-voltage secondary secondary grid, further improving the power supply stability of the power supply system.

[0074] In one or more embodiments, a voltage stabilizing capacitor can be connected in parallel at the output terminals of the first DC voltage converter 21 and the second DC voltage converter 31, thereby absorbing voltage surges and fluctuations caused by the electrical equipment.

[0075] In one or more embodiments of this application, reference is made to Figure 1 , Figure 2 as well as Figure 3 As shown, at least one first power distribution port of the first power distribution device 2 and at least one first power distribution port of the second power distribution device 3 are used to power the same electrical device. And / or, at least one second power distribution port of the first DC voltage converter 21 and at least one second power distribution port of the second DC voltage converter 31 are used to power the same electrical device.

[0076] In this embodiment, at least one first distribution port of the first power distribution device 2 and at least one first distribution port of the second power distribution device 3 are used to supply power to the same electrical equipment. That is, in the event of a power supply failure in the low-voltage primary main grid, the low-voltage secondary grid can also be activated to supply power to the electrical equipment supplied by the low-voltage primary main grid. The combination of power supply redundancy of the battery assembly 4 and power supply redundancy of the low-voltage secondary grid can greatly improve the operational stability of the electrical equipment.

[0077] At least one second power distribution port of the first DC voltage converter 21 and at least one second power distribution port of the second DC voltage converter 31 are used to power the same electrical equipment. That is, in the event of a power failure in the low-voltage primary main grid, the low-voltage secondary auxiliary grid can still be activated to power the electrical equipment supplied by the low-voltage secondary main grid. Therefore, the combination of power supply redundancy of the battery assembly 4 and power supply redundancy of the low-voltage secondary auxiliary grid can greatly improve the operational stability of the electrical equipment.

[0078] In the above embodiments, the power grid to which each electrical device is connected can be determined according to the power supply function safety level, without further limitations.

[0079] In one or more embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the power supply system further includes a regional control unit 5. The first voltage input terminal of the regional control unit 5 is coupled to one of the second power distribution ports of the first DC voltage converter 21, and the second voltage input terminal of the regional control unit 5 is coupled to one of the second power distribution ports of the second DC voltage converter 31, so as to supply power to the regional control unit 5 through one of the first DC voltage converter 21 and the second DC voltage converter 31.

[0080] In this embodiment, the Zone Control Unit 5 (ZCU) refers to a control unit for power distribution management of electrical equipment. The Zone Control Unit 5 includes a first voltage input terminal and a second voltage input terminal. The first voltage input terminal of the Zone Control Unit 5 is coupled to one of the second power distribution ports of the first DC-DC converter 21. The second voltage input terminal of the Zone Control Unit 5 is coupled to one of the second power distribution ports of the second DC-DC converter 31. Therefore, when a second voltage value of DC is input to the first voltage input terminal of the Zone Control Unit 5 through the first DC-DC converter 21, the Zone Control Unit 5 can adjust the output current according to the power demand of the electrical equipment it supplies. This can prevent overcurrent or undercurrent in the electrical load. Furthermore, the Zone Control Unit 5 can switch power supply paths. It can switch to the second DC-DC converter 31 for voltage input when the voltage input of the first DC-DC converter 21 fails, or vice versa. This improves the power supply safety level of the area control unit 5, thereby enhancing the operational stability of the electrical equipment powered by the area control unit 5.

[0081] In one or more embodiments of this application, reference is made to Figure 1 As shown, one high-voltage DC converter 1 is provided, and the first power distribution device 2 and the second power distribution device 3 are respectively coupled to the output terminal of the same high-voltage DC converter 1.

[0082] In this embodiment, the high-voltage direct current converter 1 is shared between the low-voltage primary main grid and the low-voltage primary auxiliary grid. When only one high-voltage direct current converter 1 is used, the first power distribution device 2 and the second power distribution device 3 are respectively coupled to the output terminal of the same high-voltage direct current converter 1. Thus, the high-voltage direct current converter 1 simultaneously outputs DC power of a first voltage value to both the low-voltage primary main grid and the low-voltage primary auxiliary grid. This shared high-voltage direct current converter 1 design improves the power supply security of the power supply system while reducing the number of high-voltage direct current converters (1), thereby simplifying the structural complexity of the power supply system and reducing its weight and cost. For example, this system architecture sharing the high-voltage direct current converter 1 is suitable for scenarios requiring a high level of power supply security for the high-voltage direct current converter 1.

[0083] In one or more embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the power supply system also includes a first bidirectional disconnect switch 6, which is coupled between the first voltage input terminal of the first power distribution device 2 and the first voltage input terminal of the second power distribution device 3.

[0084] In this embodiment, the power supply system may further include a first bidirectional disconnect switch 6. The first bidirectional disconnect switch 6 refers to a switching device used for bidirectional circuit switching control and providing electrical isolation during power outages. When coupled to the first voltage input terminal of the first power distribution device 2 and the first voltage input terminal of the second power distribution device 3, the first bidirectional disconnect switch 6 can control the conduction and disconnection of current from the low-voltage primary main grid to the low-voltage secondary grid, and also control the conduction and disconnection of current from the low-voltage secondary grid to the low-voltage primary main grid.

[0085] In one example, the connection between the low-voltage primary main grid and the low-voltage secondary grid can be adjusted by setting the first bidirectional disconnect switch 6. For instance, if a fault occurs in either the primary grid or the secondary grid, the load supplied by the faulty grid can be transferred to the normally operating grid via the first bidirectional disconnect switch 6, thereby ensuring the power supply stability of the equipment. Furthermore, power supply to a single primary grid can be selected from the primary grid to the secondary grid based on the needs of the equipment. When supplying power to a single primary grid, the primary and secondary grids can be completely isolated when the first bidirectional disconnect switch 6 is in the off state. Alternatively, the first bidirectional disconnect switch 6 can be in the on state to achieve parallel power supply to the two primary grids. This improves the power supply efficiency of the power supply system and enriches its power supply modes.

[0086] In one or more embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the power supply system also includes a second bidirectional disconnect switch 7, which is coupled between the high-voltage DC converter 1 and the first voltage input terminal of the first power distribution device 2.

[0087] In this embodiment, the power supply system may further include a second bidirectional disconnect switch 7, which is a switching device used for bidirectional circuit on / off control and providing electrical isolation during power outages. The second bidirectional disconnect switch 7 is coupled between the high-voltage DC converter 1 and the first voltage input terminal of the first power distribution device 2, enabling the circuit between the high-voltage DC converter 1 and the first voltage input terminal of the first power distribution device 2 to be connected and disconnected. When the high-voltage DC converter 1 needs to supply power to the first power distribution device 2, or when the first power distribution device 2 feeds back electrical energy to the high-voltage DC converter 1, the second bidirectional disconnect switch 7 can be closed to form a circuit. When the high-voltage DC converter 1 fails, or when the connection line between the high-voltage DC converter 1 and the first voltage input terminal of the first power distribution device 2 fails, the second bidirectional disconnect switch 7 can be opened to isolate the faulty line from the low-voltage primary main power grid, thereby preventing further expansion of the fault.

[0088] In one or more embodiments, refer to Figure 1 and Figure 2 As shown, the power supply system also includes a third bidirectional disconnect switch 8, which is coupled between the high-voltage DC converter 1 and the first voltage input terminal of the second power distribution device 3.

[0089] In this embodiment, the power supply system may further include a third bidirectional disconnect switch 8, which is a switching device used for bidirectional circuit on / off control and providing electrical isolation during power outages. The third bidirectional disconnect switch 8 is coupled between the first voltage input terminal of the high-voltage DC converter 1 and the second power distribution device 3, enabling the circuit between the high-voltage DC converter 1 and the first voltage input terminal of the second power distribution device 3 to be connected and disconnected. When the high-voltage DC converter 1 needs to supply power to the second power distribution device 3, or when the second power distribution device 3 feeds back electrical energy to the high-voltage DC converter 1, the third bidirectional disconnect switch 8 can be closed to form a circuit. When the high-voltage DC converter 1 fails, or when the connection line between the high-voltage DC converter 1 and the first voltage input terminal of the second power distribution device 3 fails, the third bidirectional disconnect switch 8 can be opened to isolate the faulty line from the low-voltage primary secondary power grid, thereby preventing further expansion of the fault.

[0090] In this embodiment, the first bidirectional isolation switch 6, the second bidirectional isolation switch 7, and the third bidirectional isolation switch 8 can all be back-to-back MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) arrays, typically referring to two MOS transistors connected source-to-source or drain-to-drain. By inputting a preset driving voltage to the gates of the two MOS transistors, they are both in the off state, thus blocking current in both directions and achieving bidirectional isolation.

[0091] In one or more embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the power supply system also includes a first one-way disconnect switch 9, which is coupled between the battery assembly 4 and the second voltage input terminal of the first power distribution device 2, so that the current in the battery assembly 4 flows unidirectionally into the first power distribution device 2.

[0092] In this embodiment, the power supply system may further include a first unidirectional disconnect switch 9. The first unidirectional disconnect switch 9 is a switching device that functions as an isolation and switching device in the circuit, and restricts the current flow in a single direction. The first unidirectional disconnect switch 9 is coupled between the battery assembly 4 and the second voltage input terminal of the first power distribution device 2, allowing the current in the battery assembly 4 to flow unidirectionally into the first power distribution device 2, preventing the current in the first power distribution device 2 from flowing back into the battery assembly 4. This protects the battery assembly 4.

[0093] In one or more embodiments of this application, the power supply system further includes a second one-way disconnect switch 10, which is coupled between the battery assembly 4 and the second voltage input terminal of the second power distribution device 3, so that the current in the battery assembly 4 flows unidirectionally into the second power distribution device 3.

[0094] In this embodiment, the power supply system may further include a second unidirectional disconnect switch 10. The second unidirectional disconnect switch 10 is a switching device that provides isolation and switching in the circuit and restricts current flow in a single direction. The second unidirectional disconnect switch 10 is coupled between the battery assembly 4 and the second voltage input terminal of the second power distribution device 3, allowing current in the battery assembly 4 to flow unidirectionally into the second power distribution device 3, preventing current in the second power distribution device 3 from flowing back into the battery assembly 4, thereby protecting the battery assembly 4.

[0095] In one or more embodiments of this application, reference is made to Figure 1 and Figure 2 As shown, the power supply system also includes a third one-way disconnect switch 11, which is located at the first power distribution port.

[0096] In this embodiment, the power supply system may further include a third unidirectional disconnect switch 11, which is a switching device that serves to isolate and disconnect the circuit and restricts the current flow in a single direction. The third unidirectional disconnect switch 11 is located at the first power distribution port, preventing backflow of current from the electrical load into the first power distribution device 2 or the second power distribution device 3, thereby protecting at least one of the first power distribution device 2 and the second power distribution device 3.

[0097] Example 2

[0098] In one or more embodiments, refer to Figure 1 and Figure 2 As shown, the battery assembly 4 may include a first battery module 41 and a second battery module 42. The first battery module 41 is coupled to the second voltage input terminal of the first power distribution device 2. The second battery module 42 is coupled to the second voltage input terminal of the second power distribution device 3.

[0099] In this embodiment of the application, the battery assembly 4 may further include two sets of battery modules, namely a first battery module 41 and a second battery module 42.

[0100] The first battery module 41 can be understood as an energy storage module including at least one individual battery. For example, the individual battery can be a lithium battery or similar type. The first battery module 41 is coupled to the second voltage input terminal of the first power distribution device 2, so that DC power of a first voltage value can be input to the first power distribution device 2 through the first battery module 41. Therefore, in the event of a failure in the high-voltage DC converter 1, or the connection line between the high-voltage DC converter 1 and the first power distribution device 2, the first battery module 41 can be replaced to supply power, thereby improving the operational stability of the downstream circuits or electrical equipment of the first power distribution device 2.

[0101] The second battery module 42 can be understood as an energy storage module including at least one individual battery. For example, the individual battery can be a lithium battery or similar type. The second battery module 42 is coupled to the second voltage input terminal of the second power distribution device 3, so that DC power of a first voltage value can be input to the second power distribution device 3 through the second battery module 42. Therefore, in the event of a failure in the high-voltage DC converter 1, or the connection line between the high-voltage DC converter 1 and the second power distribution device 3, the second battery module 42 can be replaced to supply power, thereby improving the operational stability of the downstream circuits or electrical equipment of the second power distribution device 3.

[0102] In summary, when the power supply circuit of the low-voltage primary main power grid fails, the low-voltage secondary auxiliary power grid can continue to operate, thereby improving the operational stability of various electrical devices. Furthermore, by having the first battery module 41 and the second battery module 42 operate alternately, the number of charge and discharge cycles of the battery modules is evenly distributed, thus extending the service life of the power supply system.

[0103] Example 3

[0104] Reference Figure 2 As shown, in one or more embodiments of this application, two high-voltage DC converters 1 are provided, the first power distribution device 2 is coupled to the output terminal of the first high-voltage DC converter 1, and the second power distribution device 3 is coupled to the output terminal of the second high-voltage DC converter 1.

[0105] In this embodiment, the high-voltage direct current (HVDC) converters 1 in the low-voltage primary main grid and the low-voltage primary secondary grid are separately configured. When two HVDC converters 1 are configured, the first power distribution device 2 is coupled to the output terminal of the first HVDC converter 1, and the second power distribution device 3 is coupled to the output terminal of the second HVDC converter 1. The first HVDC converter 1 outputs DC power of a first voltage value to the low-voltage primary main grid, and the second HVDC converter 1 outputs DC power of the first voltage value to the low-voltage primary secondary main grid. By employing different structural designs for the HVDC converters 1 in the low-voltage primary main grid and the low-voltage primary secondary grid, the power supply stability of both the primary and secondary grids can be avoided when a fault occurs in one HVDC converter 1. Therefore, this system architecture with two HVDC converters 1 configured separately is suitable for scenarios where the power supply safety level of the HVDC converters 1 is low.

[0106] This application also provides an electrical system assembly, which may include a power supply system and an electrical device 12 as described in any of the above utility model embodiments. The electrical device 12 is electrically connected to the power supply system to be powered by the power supply system.

[0107] This application also provides a vehicle that may include the electrical system assembly described in the above embodiments. A vehicle with the above electrical system assembly can meet ASIL (Automotive Safety Integrity Level) D, thereby improving the vehicle's operational safety and stability. The first voltage value can be 48V, and the second voltage value can be 12V. By sharing a first battery module 41 and a second battery module 42, three voltage power supplies are used to form a redundant power supply of 48V and 12V.

[0108] In one or more embodiments, when the vehicle integrates an intelligent driving system, the area control unit 5 can supply power to the domain controller in the intelligent driving system, thereby providing the input of the second voltage value through the first power distribution device 2 and the second power distribution device 3 respectively, achieving a redundant power supply state of the second voltage value, thereby meeting the power supply function safety requirements of the domain controller power supply function safety D.

[0109] In one or more embodiments, the electrical equipment in the vehicle can be connected to the power distribution ports of different power supply systems based on different operating voltage values ​​and power supply safety requirements, without being overly limited here. For example, a 48V blower product, which does not have power redundancy requirements or a necessary single-network power supply requirement, can be powered by any of the first power distribution ports in the first power distribution device 2 or the second power distribution device 3. As another example, a 12V roof-mounted lidar, which requires power from the first power distribution device 2 according to the intelligent driving system requirements, can be powered by the second power distribution port of the first DC voltage converter 21.

[0110] The way the first power distribution device 2 and the second power distribution device 3 are distributed in the vehicle allows the other power distribution device to continue to supply power even if one of them is damaged in the event of a collision, thus ensuring the safety of vehicle operation.

[0111] Terminology Explanation

[0112] Battery assembly 4 can be understood as an energy storage assembly including at least one battery module.

[0113] A power distribution device can be understood as a device that distributes electrical energy from a power supply to different downstream circuits or electrical equipment as needed. In this application, "multiple" refers to two or more.

[0114] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0115] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0116] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0117] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0118] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power supply system, characterized in that, The power supply system includes: A high-voltage direct current converter, wherein the high-voltage direct current converter outputs direct current at a first voltage value; A first power distribution device, wherein a first voltage input terminal of the first power distribution device is coupled to the output terminal of the high voltage DC converter, and the first power distribution device includes at least one first power distribution port that outputs a first voltage value; The second power distribution device has a first voltage input terminal coupled to the output terminal of the high voltage DC converter, and the second power distribution device includes at least one first power distribution port that outputs a first voltage value. A battery assembly, wherein the battery assembly is coupled to the second voltage input terminal of the first power distribution device and to the second voltage input terminal of the second power distribution device; and... The first power distribution device includes at least a first DC voltage converter, the voltage input terminal of the first DC voltage converter is coupled to the voltage input terminal of the first power distribution device, and is used to convert DC power of a first voltage value into DC power of a second voltage value. The first DC voltage converter includes at least one second power distribution port that outputs the second voltage value. The second power distribution device includes at least a second DC voltage converter, the input terminal of which is coupled to the output terminal of the high voltage DC converter to convert DC power of a first voltage value into DC power of a second voltage value. The second DC voltage converter includes at least one second power distribution port that outputs the second voltage value.

2. The power supply system according to claim 1, characterized in that, The battery assembly includes a first battery module, which is coupled to the second voltage input terminal of the first power distribution device and to the second voltage input terminal of the second power distribution device.

3. The power supply system according to claim 1, characterized in that, The battery assembly includes: The first battery module is coupled to the second voltage input terminal of the first power distribution device; The second battery module is coupled to the second voltage input terminal of the second power distribution device.

4. The power supply system according to claim 2 or 3, characterized in that, At least one first distribution port of the first power distribution device and at least one first distribution port of the second power distribution device are used to supply power to the same electrical device; and / or, At least one second power distribution port of the first DC voltage converter and at least one second power distribution port of the second DC voltage converter are used to power the same electrical device.

5. The power supply system according to claim 4, characterized in that, The power supply system further includes a regional control unit, wherein a first voltage input terminal of the regional control unit is coupled to one of the second power distribution ports of the first DC voltage converter, and a second voltage input terminal of the regional control unit is coupled to one of the second power distribution ports of the second DC voltage converter, so as to supply power to the regional control unit through one of the first DC voltage converter and the second DC voltage converter.

6. The power supply system according to claim 1, characterized in that, The first DC voltage converter is a bidirectional DC-DC converter; the second DC voltage converter is a bidirectional DC-DC converter.

7. The power supply system according to claim 1, characterized in that, At most two high-voltage DC converters are provided, with the first power distribution device and the second power distribution device respectively coupled to the output terminal of the same high-voltage DC converter; or... The first power distribution device is coupled to the output terminal of the first high-voltage DC converter, and the second power distribution device is coupled to the output terminal of the second high-voltage DC converter.

8. The power supply system according to claim 1, characterized in that, The power supply system further includes a first bidirectional disconnect switch, which is coupled between a first voltage input terminal of the first power distribution device and a first voltage input terminal of the second power distribution device; and / or The power supply system further includes a second bidirectional disconnect switch, which is coupled between the high-voltage DC converter and the first voltage input terminal of the first power distribution device; and / or The power supply system also includes a third bidirectional disconnect switch, which is coupled between the high-voltage DC converter and the first voltage input terminal of the second power distribution device.

9. The power supply system according to claim 1, characterized in that, The power supply system further includes a first one-way disconnect switch, which is coupled between the battery pack and the second voltage input terminal of the first power distribution device, so that the current in the battery pack flows unidirectionally into the first power distribution device. And / or, The power supply system further includes a second unidirectional disconnect switch, which is coupled between the battery pack and the second voltage input terminal of the second power distribution device, so that current in the battery pack flows unidirectionally into the second power distribution device; and / or The power supply system also includes a third one-way disconnect switch, which is located at the first power distribution port.

10. An electrical system assembly, characterized in that, The electrical system assembly includes: The power supply system as described in any one of claims 1-9; Electrical equipment, which is electrically connected to the power supply system to be powered by the power supply system.

11. A vehicle, characterized in that, The vehicle includes the electrical system assembly as described in claim 10.

Images