48V electric energy system and vehicle

Abstract

The invention relates to a vehicle which comprises a low-voltage power supply assembly, a low-voltage power utilization assembly and at least one domain control assembly. The low-voltage power utilization assembly comprises at least two loads, the at least two loads comprise a plurality of first loads and a plurality of second loads, and the rated voltage of the first loads is higher than that of the second loads; the low-voltage power supply assembly is connected with at least part of the first loads and the domain control assembly and used for directly providing first voltage for the corresponding first loads. The domain control assembly is respectively connected with the low-voltage power supply assembly, at least part of the first load and at least part of the second load, and is used for controlling the low-voltage power supply assembly to provide a first voltage for the first load corresponding to the domain control assembly, converting the first voltage into a second voltage and providing the second voltage for the corresponding second load, the first voltage is greater than the second voltage. According to the vehicle, the 12V power supply system of the vehicle in the related technology can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a 48V electric energy system and a vehicle. Background Art

[0002] With the development of technology, new energy vehicles are becoming more and more common in people's lives.

[0003] In the related art, new energy vehicles only use 12V batteries to power the vehicle's low-voltage loads. However, with the development of vehicles, there are more and more high-power devices on the vehicle, and the conventional 12V low-voltage system can hardly meet the development needs of electrical devices on the vehicle. Summary of the invention

[0004] Based on this, it is necessary to provide a 48V power system and vehicle that can improve the on-board 12V low-voltage power supply system in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a 48V electric energy system, the system comprising a low-voltage power supply component, a low-voltage power consumption component and at least one domain control component; wherein,

[0006] The low-voltage electrical component comprises a plurality of first loads and a plurality of second loads, wherein the rated voltage of the first loads is higher than the rated voltage of the second loads;

[0007] The low-voltage power supply component is respectively connected to at least part of the first loads and the domain control component, and is used to directly provide a first voltage to the corresponding first load;

[0008] The domain control component is respectively connected to the low-voltage power supply component, at least part of the first load and at least part of the second load, and is used to control the low-voltage power supply component to provide a first voltage to the first load corresponding to the domain control component, and convert the first voltage into a second voltage to provide a second voltage to the corresponding second load, wherein the first voltage is greater than the second voltage.

[0009] In one embodiment, the domain control component includes:

[0010] at least one voltage conversion unit, connected to the low-voltage power supply component and the corresponding second load, respectively, for converting a first voltage into a second voltage and supplying power to the corresponding second load;

[0011] A first control unit is respectively connected to the low-voltage power supply component and the voltage conversion unit, and is used to control the low-voltage power supply component to provide a first voltage for the first load corresponding to the domain control component, and to control the voltage conversion unit to provide a second voltage for the corresponding second load.

[0012] In one embodiment, the at least one voltage conversion unit includes:

[0013] a first voltage conversion unit, connected to the low-voltage power supply component, the corresponding second load and the control unit, respectively, for converting a first voltage into a second voltage, and supplying power to the corresponding second load under the control of the first control unit;

[0014] a second voltage conversion unit, connected to the low-voltage power supply component, the corresponding second load and the control unit, respectively, for converting the first voltage into a second voltage, supplying power to the first control unit and supplying power to the corresponding second load under the control of the first control unit;

[0015] The domain control component also includes a unidirectional conduction unit, an input end of the unidirectional conduction unit is connected to a second voltage conversion unit, an output end of the second voltage conversion unit is connected to the first voltage conversion unit, and the unidirectional conduction unit is used to prevent the first voltage conversion unit from supplying power to the control unit.

[0016] In one of the embodiments, when the second load is in a normal working state, the first control unit controls the first voltage conversion unit and the second voltage conversion unit to supply power to the second load simultaneously.

[0017] In one of the embodiments, when the second load is in a dormant state, the first control unit controls the second voltage conversion unit to supply power to the second load.

[0018] In one embodiment, the low-voltage power supply component has a negative port, a first positive port and at least one second positive port; the low-voltage power supply component includes a power supply unit and at least one third voltage conversion unit, wherein the number of the second positive ports is the same as the number of the third voltage conversion units;

[0019] The positive electrode of the power supply unit is connected to the first positive electrode port and the third voltage conversion unit respectively, the negative electrode of the power supply unit is connected to the negative electrode port, and the third voltage conversion unit is connected to the corresponding second positive electrode port;

[0020] The third voltage conversion unit is used to convert the external voltage of the external charging component into the first voltage, so that the external charging component charges the power supply unit.

[0021] In one embodiment, the low voltage power supply component further includes: a fourth voltage conversion unit, a second control unit and a switch unit, wherein:

[0022] The fourth voltage conversion unit is connected to the power supply unit and the second control unit respectively, the first end of the switch unit is connected to the first positive electrode port, the second end of the switch unit is connected to the positive electrode of the power supply unit, and the control end of the switch unit is connected to the second control unit;

[0023] The fourth voltage conversion unit is used to convert the first voltage into a third voltage. When the second control unit receives the third voltage, the second control unit controls the switch unit to turn on so that the power supply unit outputs the first voltage through the first positive port and the negative port.

[0024] In one embodiment, the low-voltage power supply component also includes: a sampling unit, which is respectively connected to the positive pole of the power supply unit, the negative pole of the power supply unit and the second control unit, and the second control unit is also used to obtain a sampling electrical signal of the sampling unit, and when the sampling electrical signal is abnormal, the switch unit is controlled to shut down.

[0025] In one embodiment, the low voltage power supply component further includes:

[0026] A protection unit, wherein a first end of the protection unit is connected to the first positive electrode port and the third voltage conversion unit, a second end of the protection unit is connected to the positive electrode of the power supply unit, and the protection unit is used to protect the power supply unit.

[0027] In a second aspect, the present application also provides a vehicle, which includes a 48V power system in any one of the above embodiments.

[0028] The above-mentioned 48V power system and vehicle include a low-voltage power supply component, a low-voltage power consumption component and at least one domain control component. The low-voltage power consumption component includes at least two loads, and the at least two loads include a plurality of first loads and a plurality of second loads, and the rated voltage of the first load is higher than the rated voltage of the second load; the low-voltage power supply component is respectively connected to at least part of the first load and the domain control component, and is used to directly provide a first voltage to the corresponding first load; the domain control component is respectively connected to the low-voltage power supply component, at least part of the first load and at least part of the second load, and is used to control the low-voltage power supply component to provide a first voltage to the first load corresponding to the domain control component, and convert the first voltage into a second voltage, and provide a second voltage to the corresponding second load, wherein the first voltage is greater than the second voltage. The 48V power system of the present application has two loads with different rated voltages, and a low-voltage power supply component capable of outputting a larger voltage is configured therein, which can reduce the current on the transmission harness while the power consumption on the vehicle remains unchanged, reduce the heat loss on the transmission harness, and reduce the volume of the transmission harness, thereby increasing the usable space in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] FIG1 is a schematic diagram of the structure of a 48V electric energy system in one embodiment of the present application;

[0031] FIG2 is a schematic diagram of the structure of a domain control component in one embodiment of the present application;

[0032] FIG3 is a schematic diagram of the structure of a domain control component in one embodiment of the present application;

[0033] FIG4 is a schematic diagram of the structure of a low-voltage power supply assembly in one embodiment of the present application;

[0034] FIG5 is a schematic diagram of the structure of a low-voltage power supply assembly in another embodiment of the present application;

[0035] FIG6 is a schematic diagram of the structure of a low-voltage power supply assembly in another embodiment of the present application;

[0036] FIG. 7 is a schematic diagram of the structure of a vehicle in another embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0040] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0041] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0042] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0043] In an exemplary embodiment, the present application provides a 48V electric energy system. The following is an example of the 48V electric energy system of the present application being applied to a vehicle. Please refer to FIG1 . The 48V electric energy system may include a low-voltage power supply component 11, a low-voltage power component 2, and at least one domain control component 3; wherein,

[0044] The low-voltage electrical component 2 includes a plurality of first loads 21 and a plurality of second loads 22, wherein the rated voltage of the first load 21 is higher than the rated voltage of the second load 22. The low-voltage power supply component 1 is respectively connected to at least part of the first loads 21 and the domain control component 3, and is used to directly provide a first voltage to the corresponding first load 21. The domain control component 3 is respectively connected to the low-voltage power supply component 1, at least part of the first loads 21 and at least part of the second loads 22, and is used to control the low-voltage power supply component 1 to provide a first voltage to the first load 21 corresponding to the domain control component 3, and to convert the first voltage into a second voltage, and provide a second voltage to the corresponding second load 22, wherein the first voltage is greater than the second voltage.

[0045] In one example, the first load 21 may be a 48V load, the second load 22 may be a 12V load, and the low-voltage power supply component 11 may be a 48V low-voltage battery pack. In an application, part of the first load 21 is directly connected to the low-voltage power supply component 11, and the low-voltage power supply component 11 directly provides the first voltage to the first load 21. In one example, the first load 21 directly connected to the low-voltage power supply component 11 may be a relatively high-power low-voltage load. In the present application, some conventional low-voltage loads with a rated voltage of 12V are replaced with low-voltage loads with a rated voltage of 48V. Compared with the method of increasing the current to meet the growing demand for the electric power of the low-voltage load in the related art, the present application adapts to the growing demand for the electric power of the low-voltage load by increasing the rated voltage of the low-voltage load. It can reduce the transmission current on the transmission harness while adapting to the growing demand for the electric power of the low-voltage load. When the transmission current is reduced, the diameter of the transmission harness can be adaptively reduced, thereby reducing the weight and volume of the transmission harness in the vehicle, helping the vehicle to reduce weight and increase the available space in the vehicle. At the same time, since the heat loss on the transmission harness is positively correlated with the transmission current, the heat loss on the transmission harness can also be reduced when the transmission current is reduced.

[0046] The 48V power system also includes at least one domain control component 3, part of the second load 22 and part of the first load 21 can be connected to the domain control component 3, and the domain control component 3 can control the working state of the corresponding second load 22 and the first load 21, and supply power to them according to their power requirements. Specifically, the domain control component 3 can also convert the first voltage into a second voltage to supply power to the second load 22 and part of the first load 21. It can be seen that in this application, the first voltage is converted into the second voltage for power supply through the domain control component 3, and the original 12V battery in the vehicle is eliminated, which can further help the vehicle reduce weight.

[0047] The above-mentioned 48V power system includes a low-voltage power supply component, a low-voltage power consumption component and at least one domain control component. The low-voltage power consumption component includes at least two loads, and the at least two loads include a plurality of first loads and a plurality of second loads, and the rated voltage of the first load is higher than the rated voltage of the second load; the low-voltage power supply component is respectively connected to at least part of the first load and the domain control component, and is used to directly provide a first voltage to the corresponding first load; the domain control component is respectively connected to the low-voltage power supply component, at least part of the first load and at least part of the second load, and is used to control the low-voltage power supply component to provide a first voltage to the first load corresponding to the domain control component, and convert the first voltage into a second voltage, and provide a second voltage to the corresponding second load, wherein the first voltage is greater than the second voltage. The present application has two loads with different rated voltages, and a low-voltage power supply component capable of outputting a larger voltage is configured in the vehicle, which can reduce the current on the transmission harness while keeping the power consumption on the vehicle unchanged, reduce the heat loss on the transmission harness, and reduce the volume of the transmission harness, thereby increasing the usable space in the vehicle.

[0048] In an exemplary embodiment, referring to FIG. 2 , the domain control component 3 includes: at least one voltage conversion unit 31 and a first control unit 32 .

[0049] The voltage conversion unit 31 is connected to the low-voltage power supply component 1 and the corresponding second load 22 respectively, and is used to convert the first voltage into the second voltage and supply power to the corresponding second load 22 .

[0050] The first control unit 32 is connected to the low-voltage power supply component 1 and the voltage conversion unit respectively, and is used to control the low-voltage power supply component 1 to provide a first voltage to the first load 21 corresponding to the domain control component 3, and to control the voltage conversion unit to provide a second voltage to the corresponding second load 22.

[0051] It can be understood that in order to provide the second voltage for the second load 22, the domain control component 3 has at least one voltage conversion unit 31 to convert the first voltage into the second voltage. The domain control component 3 also has a first control unit 32, which can control the voltage conversion unit 31 and the low-voltage power supply component 1 to output the corresponding current according to the required current of each first load 21 and the second load 32 corresponding to the domain control component 3.

[0052] In an exemplary embodiment, referring to FIG. 3 , at least one voltage conversion unit includes a first voltage conversion unit 311 and a second voltage conversion unit 312 , and the domain control component 3 further includes a unidirectional conduction unit 33 .

[0053] The first voltage conversion unit 311 is connected to the low-voltage power supply component 1, the corresponding second load 22 and the control unit respectively, and is used to convert the first voltage into the second voltage, and supply power to the corresponding second load 22 under the control of the first control unit. The second voltage conversion unit 312 is connected to the low-voltage power supply component 1, the corresponding second load 22 and the control unit respectively, and is used to convert the first voltage into the second voltage, supply power to the first control unit and supply power to the corresponding second load 22 under the control of the first control unit. The input end of the unidirectional conduction unit 33 is connected to the second voltage conversion unit 312, and the output end of the second voltage conversion unit 312 is connected to the first voltage conversion unit 311. The unidirectional conduction unit 33 is used to prevent the first voltage conversion unit 311 from supplying power to the control unit.

[0054] In one example, the first voltage conversion unit 311 and the second voltage conversion unit 312 may both be 48V to 12V DCDC (Direct Current-Direct Current), but the power of the first voltage conversion unit 311 and the second voltage conversion unit 312 may be different, and the power of the first voltage conversion unit 311 may be greater than the power of the second voltage conversion unit 312. In the application, the input ends of the first voltage conversion unit 311 and the second voltage conversion unit 312 are both connected to the low-voltage power supply component 1, and the output ends are both connected to the second load 22 corresponding to the domain control component 3, and the output end of the second voltage conversion unit 312 is also connected to the first control unit 32. When the vehicle is in a dormant state, the second load 22 in the vehicle may be in a dormant state or a low-energy state, and the first control unit 32 can control the second voltage conversion unit 312 to power the second load 22. At the same time, since the output end of the second voltage conversion unit 312 is also connected to the first control unit 32, the second voltage conversion unit 312 can also power the first control unit 32. When the vehicle is in a running state, the second load and the first load in the vehicle are also in a corresponding working state. At this time, the current required by each second load and each first load is relatively large. The first control unit 32 can control the first voltage conversion unit 311 to work so that the first voltage conversion unit 311 and the second voltage conversion unit 312 work together to supply power to the corresponding second load 22.

[0055] In the application, the domain control component 3 may also include a communication unit and a diagnostic unit. The communication unit is respectively connected to each first load 21 and each second load 32 corresponding to the domain control component 3, and the communication unit is also connected to the first control unit 32, so that each first load 21 can communicate with the first control unit 32, and each second load 32 can communicate with the first control unit 32. The diagnostic unit is respectively connected to each first load 21 and each second load 32 corresponding to the domain control component 3, and the diagnostic unit is also connected to the first control unit 32. The diagnostic unit can obtain the fault information of each first load 21 and each second load 32 in real time, and send the fault information to the first control unit 32. When the first control unit 32 receives the fault information, it controls to implement corresponding protection measures, such as cutting off the power supply of the first voltage conversion unit 311 and / or the second voltage conversion unit 312 to the faulty second load 22, and cutting off the power supply of the low-voltage power supply component 1 to the faulty first load 21, so as to avoid further expansion of the fault impact.

[0056] In an exemplary embodiment, please refer to FIG. 4 , the low-voltage power supply component 1 has a negative port P-, a first positive port P1+ and at least one second positive port P2+; the low-voltage power supply component 1 includes a power supply unit 11 and at least one third voltage conversion unit 12, wherein the number of the second positive ports P2+ is the same as the number of the third voltage conversion units 12. The positive pole of the power supply unit 11 is connected to the first positive port P1+ and the third voltage conversion unit 12, respectively, the negative pole of the power supply unit 11 is connected to the negative port P-, and the third voltage conversion unit 12 is connected to the corresponding second positive port P2+. The third voltage conversion unit 12 is used to convert the external voltage of the external charging component into a first voltage so that the external charging component charges the power supply unit 11.

[0057] In application, when the vehicle is in a dormant state and the low-voltage power supply component 1 is feeding power, an external charging component can be used to charge the power supply unit 11 of the low-voltage power supply component 1. Specifically, when the external charging component is a 48V battery, the power supply unit 11 can be charged directly through the first positive port P1+ and the negative port P-. If the external charging component is not a 48V battery, the external voltage needs to be converted to the first voltage first so that the external charging component can charge the power supply unit 11. Exemplarily, the third voltage conversion unit 12 can be a 12V to 48V DCDC. When the external charging component is a 12V battery, the power supply unit 11 can be charged through the second positive port P2+, the negative port P- and the third voltage conversion unit 12.

[0058] In an exemplary embodiment, please refer to FIG5 , the low-voltage power supply assembly 1 further includes: a fourth voltage conversion unit 13, a second control unit 14 and a switch unit 15, wherein the fourth voltage conversion unit 13 is connected to the power supply unit 11 and the second control unit 14 respectively, the first end of the switch unit 15 is connected to the first positive electrode port P1+, the second end of the switch unit 15 is connected to the positive electrode of the power supply unit 11, and the control end of the switch unit 15 is connected to the second control unit 14. The fourth voltage conversion unit 13 is used to convert the first voltage into a third voltage, and when the second control unit 14 receives the third voltage, the second control unit 14 controls the switch unit 15 to conduct, so that the power supply unit 11 outputs the first voltage through the first positive electrode port P1+ and the negative electrode port P-.

[0059] In the present application, a fourth voltage conversion unit 13, a second control unit 14 and a switch unit 15 are provided in the low voltage power supply assembly. The fourth voltage conversion unit 13 is connected to the power supply unit 11 to convert the first voltage into a third voltage, and provide the third voltage to the second control unit 14. When the second control unit 14 receives the third voltage, the second control unit 14 controls the switch unit 15 to turn on, so that the power supply unit 11 outputs the first voltage to the outside through the first positive port P1+ and the negative port P-. In one example, the switch unit can be a transistor or a switch.

[0060] In an exemplary embodiment, the low-voltage power supply component 1 further includes: a sampling unit 16 and a protection unit 17. The sampling unit 16 is connected to the positive electrode of the power supply unit 11, the negative electrode of the power supply unit 11 and the second control unit 14 respectively, and the second control unit 14 is also used to obtain the sampling electrical signal of the sampling unit 16, and control the switch unit 15 to turn off when the sampling electrical signal is abnormal. The first end of the protection unit 17 is connected to the first positive port and the third voltage conversion unit 2, and the second end of the protection unit 17 is connected to the positive electrode of the power supply unit 11, and the protection unit 17 is used to protect the power supply unit 11.

[0061] In this embodiment, when the power supply unit 11 is in a charging state, the second control unit 14 controls the switch unit 15 to be disconnected, and the external charging current enters the power supply unit 11 through the protection unit 17. When the power supply unit 11 is in a discharging state, the second control unit 14 controls the switch unit 15 to be turned on. When the power supply unit 11 is discharging, the second control unit 14 will obtain the sampling electrical signal of the sampling unit. The sampling electrical signal can be a sampling voltage or a sampling current. The second control unit 14 can detect whether the sampling electrical signal is normal. In the case of abnormal sampling electrical signal, the second control unit 14 can control the switch unit 15 to be turned off.

[0062] In an exemplary embodiment, the present application also provides a vehicle, which includes the 48V power system in any one of the above embodiments.

[0063] In an exemplary embodiment, the vehicle further includes a high-voltage power supply component 4 and a conversion component 5. The high-voltage power supply component 4 is used to output a fourth voltage, which is greater than the first voltage. The conversion component 5 is connected to the high-voltage power supply component 4 and the low-voltage power supply component 1, respectively, and is used to convert the fourth voltage into the first voltage so that the high-voltage power supply component charges the low-voltage power supply component 1. Among them, the high-voltage power supply component 4 can be a 400V or 800V high-voltage battery pack, and accordingly, the conversion component 5 can be a 400V to 48V DCDC, or an 800V to 48V DCDC.

[0064] In a detailed embodiment, the vehicle of the present application can be a 400V or 800V high-voltage electric vehicle or hybrid vehicle. Specifically, the 400V or 800V high-voltage power supply component 4 is converted to 400V or 800V to 48V DCDC output to the 48V low-voltage power supply component 1. There is only one 48V low-voltage power supply component in the whole vehicle. The 48V low-voltage power supply component 1 adopts a self-wake-up and self-power supply solution, and no external 12V battery is required to stimulate the 48V low-voltage power supply component 1 to make the 48V low-voltage power supply component 1 work. For the primary distribution load in the vehicle, a distribution box or an intelligent distribution box is used for 48V power supply. The primary distribution load is mainly high-current loads such as EPS, IBC, and fans, and the rated voltage of the primary distribution load is 48V. For the secondary power distribution load, the domain control component is used for distribution. The secondary power distribution load can include 48V low current load and 12V low current load. The domain control component has a built-in 48V to 12V DCDC to achieve 48V to 12V output and supply power to the 12V low current load. In order to solve the problem that the 48V to 12V DCDC can still supply power to components with memory and wake-up requirements after sleep, the domain control component is provided with a first voltage conversion unit and a second voltage conversion unit. When the current of the whole vehicle is greater than the output capacity of the second voltage conversion unit or the whole vehicle is awakened, the first voltage conversion unit is started, and the first voltage conversion unit and the second voltage conversion unit jointly output current to meet the needs of the secondary power supply network distribution, seamless connection, and the static current of the whole vehicle is minimized to meet the needs of the whole vehicle. On the one hand, the vehicle architecture proposed in this application can solve the problem of implementing a mixed coexistence of 48V and 12V power supplies. On the other hand, the vehicle architecture proposed in this application straightens out the order from high-voltage power supply components, low-voltage power supply components to primary power distribution and then to secondary power distribution, and clarifies the roles of components at each level. According to the architecture implementation plan of the present invention, it can ensure the smooth installation and implementation of 48V loads and 48V low-voltage power supply components.

[0065] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0066] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A 48V electric energy system, characterized in that: The system includes a low-voltage power supply component, a low-voltage power consumption component and at least one domain control component; wherein, The low-voltage electrical component comprises a plurality of first loads and a plurality of second loads, wherein the rated voltage of the first loads is higher than the rated voltage of the second loads; The low-voltage power supply component is respectively connected to at least part of the first loads and the domain control component, and is used to directly provide a first voltage to the corresponding first load; The domain control component is respectively connected to the low-voltage power supply component, at least part of the first load and at least part of the second load, and is used to control the low-voltage power supply component to provide a first voltage to the first load corresponding to the domain control component, and convert the first voltage into a second voltage to provide a second voltage to the corresponding second load, wherein the first voltage is greater than the second voltage.

2. The 48V electric energy system according to claim 1, characterized in that: The domain control component includes: at least one voltage conversion unit, connected to the low-voltage power supply component and the corresponding second load, respectively, for converting a first voltage into a second voltage and supplying power to the corresponding second load; A first control unit is respectively connected to the low-voltage power supply component and the voltage conversion unit, and is used to control the low-voltage power supply component to provide a first voltage for the first load corresponding to the domain control component, and to control the voltage conversion unit to provide a second voltage for the corresponding second load.

3. The 48V electric energy system according to claim 2, characterized in that: The at least one voltage conversion unit comprises: a first voltage conversion unit, connected to the low-voltage power supply component, the corresponding second load and the control unit, respectively, for converting a first voltage into a second voltage, and supplying power to the corresponding second load under the control of the first control unit; a second voltage conversion unit, connected to the low-voltage power supply component, the corresponding second load and the control unit, respectively, for converting the first voltage into a second voltage, supplying power to the first control unit and supplying power to the corresponding second load under the control of the first control unit; The domain control component also includes a unidirectional conduction unit, an input end of the unidirectional conduction unit is connected to a second voltage conversion unit, an output end of the second voltage conversion unit is connected to the first voltage conversion unit, and the unidirectional conduction unit is used to prevent the first voltage conversion unit from supplying power to the control unit.

4. The 48V electric energy system according to claim 3, characterized in that: When the second load is in a normal working state, the first control unit controls the first voltage conversion unit and the second voltage conversion unit to supply power to the second load simultaneously.

5. The 48V electric energy system according to claim 3, characterized in that: When the second load is in a dormant state, the first control unit controls the second voltage conversion unit to supply power to the second load.

6. The 48V electric energy system according to claim 1, characterized in that: The low-voltage power supply component has a negative port, a first positive port and at least one second positive port; the low-voltage power supply component includes a power supply unit and at least one third voltage conversion unit, wherein the number of the second positive ports is the same as the number of the third voltage conversion units; The positive electrode of the power supply unit is connected to the first positive electrode port and the third voltage conversion unit respectively, the negative electrode of the power supply unit is connected to the negative electrode port, and the third voltage conversion unit is connected to the corresponding second positive electrode port; The third voltage conversion unit is used to convert the external voltage of the external charging component into the first voltage, so that the external charging component charges the power supply unit.

7. The 48V electric energy system according to claim 6, characterized in that: The low voltage power supply component further includes: a fourth voltage conversion unit, a second control unit and a switch unit, wherein: The fourth voltage conversion unit is connected to the power supply unit and the second control unit respectively, the first end of the switch unit is connected to the first positive electrode port, the second end of the switch unit is connected to the positive electrode of the power supply unit, and the control end of the switch unit is connected to the second control unit; The fourth voltage conversion unit is used to convert the first voltage into a third voltage. When the second control unit receives the third voltage, the second control unit controls the switch unit to turn on so that the power supply unit outputs the first voltage through the first positive port and the negative port.

8. The 48V electric energy system according to claim 7, characterized in that: The low-voltage power supply component also includes: a sampling unit, which is respectively connected to the positive pole of the power supply unit, the negative pole of the power supply unit and the second control unit, and the second control unit is also used to obtain a sampling electrical signal of the sampling unit, and when the sampling electrical signal is abnormal, control the switch unit to shut down.

9. The 48V electric energy system according to claim 6, characterized in that: The low voltage power supply component also includes: A protection unit, wherein a first end of the protection unit is connected to the first positive electrode port and the third voltage conversion unit, a second end of the protection unit is connected to the positive electrode of the power supply unit, and the protection unit is used to protect the power supply unit.

10. A vehicle, characterized in that: The vehicle comprises the 48V electrical energy system as described in any one of claims 1-9.

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