Vehicle power supply system and automobile

Abstract

The invention relates to a vehicle power supply system and an automobile. The vehicle power supply system comprises a high-voltage power supply subsystem and a low-voltage power supply subsystem, wherein the low-voltage power supply subsystem comprises a high-low voltage conversion controller, a first low-voltage power supply module and a second low-voltage power supply module; the high-voltage power supply subsystem is used for sending a first electric signal so as to supply power to the driving motor and the low-voltage power supply subsystem; the high-low voltage conversion controller is used for receiving the first electric signal from the high-voltage power supply subsystem and converting the first electric signal into a second electric signal and a third electric signal; the first low-voltage power supply module is used for receiving the second electric signal from the high-low voltage conversion controller so as to supply power to the first load set; and the second low-voltage power supply module is used for receiving the third electric signal from the high-low voltage conversion controller so as to supply power to the second load set. The two low-voltage power supply modules providing different voltages are arranged to supply power to different load sets, so that the load bearing capacity of the vehicle can be improved, and the energy consumption of the vehicle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a vehicle power supply system and a vehicle. Background Art

[0002] As vehicle technology develops, more and more electrical loads are included in the vehicle.

[0003] In the prior art, when a vehicle is in use, a 12V low-voltage power supply system is usually used to power electrical loads in the vehicle.

[0004] However, the 12V low-voltage power supply system will lead to problems of low load bearing capacity and high energy consumption. Summary of the invention

[0005] One of the purposes of the present invention is to provide a vehicle power supply system to solve the problems of low load bearing capacity and high energy consumption in the prior art; the second purpose is to provide a vehicle.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A vehicle power supply system, comprising: a high-voltage power supply subsystem and a low-voltage power supply subsystem; wherein the low-voltage power supply subsystem comprises: a high-low voltage conversion controller, a first low-voltage power supply module, and a second low-voltage power supply module; the high-low voltage conversion controller is connected to the high-voltage power supply subsystem, the first low-voltage power supply module, and the second low-voltage power supply module respectively;

[0008] The high voltage power supply subsystem is used to send a first electrical signal to supply power to the drive motor and the low voltage power supply subsystem;

[0009] The high-low voltage conversion controller is used to receive the first electrical signal from the high-voltage power supply subsystem and convert the first electrical signal into a second electrical signal and a third electrical signal; wherein the voltage value indicated by the first electrical signal is greater than the voltage value indicated by the second electrical signal, and the voltage value indicated by the second electrical signal is greater than the voltage value indicated by the third electrical signal;

[0010] The first low-voltage power supply module is used to receive the second electrical signal from the high-low voltage conversion controller to supply power to a first load set; wherein the rated power of each first load in the first load set is greater than or equal to a preset power threshold;

[0011] The second low voltage power supply module is used to receive the third electrical signal from the high-low voltage conversion controller to supply power to a second load set; wherein the rated power of each second load in the second load set is less than the preset power threshold.

[0012] According to the above-mentioned technical means, by setting up a low-voltage power supply module that can provide a higher power supply voltage on the basis of an original low-voltage power supply module, and reasonably dividing the vehicle's load set based on the power supply voltages of the two low-voltage power supply systems, each low-voltage power supply module can supply power to the corresponding load set respectively, thereby improving the vehicle's load-bearing capacity. Among them, setting up a low-voltage power supply module that can provide a higher power supply voltage on the basis of an original low-voltage power supply module can reduce the energy consumption on the power supply harness and further reduce the vehicle's energy consumption.

[0013] Furthermore, the first low voltage power supply module is also used to supply power to the high and low voltage conversion controller.

[0014] According to the above technical means, the power supply stability of the high-voltage converter can be ensured, thereby ensuring the accuracy of the high-low voltage conversion controller, and further improving the accuracy of the vehicle power supply.

[0015] Further, the high-low voltage conversion controller includes a control unit and a conversion unit; the first low-voltage power supply module is connected to the control unit and is used to supply power to the control unit in the high-low voltage conversion controller; the control unit is connected to the conversion unit and is used to receive a high-low voltage conversion start instruction, and generate and send a conversion control instruction to the conversion unit according to the high-low voltage conversion start instruction; the conversion unit is also connected to the high-voltage power supply subsystem, the first low-voltage power supply module, and the second low-voltage power supply module, respectively, and is used to convert the first electrical signal received from the high-voltage power supply subsystem into the second electrical signal and the third electrical signal after receiving the conversion control instruction, and send the second electrical signal to the first low-voltage power supply module, and send the third electrical signal to the second low-voltage power supply module.

[0016] According to the above-mentioned technical means, by controlling the control unit to respond to the high-low voltage conversion start instruction, the conversion unit is controlled to start the high-low voltage conversion, which can further improve the safety and accuracy of the vehicle power supply system. By controlling the conversion unit to convert and generate the second electrical signal and the third electrical signal, electrical signals are provided to the first low-voltage power supply module and the second low-voltage power supply module, thereby realizing the power supply of the vehicle power supply system, improving the load bearing capacity of the vehicle, and reducing the energy consumption of the vehicle.

[0017] Furthermore, the control unit includes a control circuit and a drive circuit; wherein the control circuit is respectively connected to the drive circuit and the first low-voltage power supply module, and is used to generate and send an initial conversion control instruction to the drive circuit according to the received high-low voltage conversion start instruction; the drive circuit is used to amplify the initial conversion control instruction, obtain and send the conversion control instruction to the conversion unit.

[0018] According to the above technical means, the initial conversion control instruction issued by the control circuit is amplified by the driving circuit, so as to improve the accuracy of the generated conversion control instruction, thereby improving the accuracy of high and low voltage conversion and further improving the accuracy of the vehicle power supply system.

[0019] Further, the conversion unit includes a first bridge circuit, a second bridge circuit, a third bridge circuit, and a transformer circuit; wherein the first bridge circuit is connected to the high-voltage power supply subsystem, the control unit, and the transformer circuit, and is used to perform AC conversion processing on the first electrical signal according to the control of the conversion control instruction, and obtain and send a fourth electrical signal to the transformer circuit; wherein the fourth electrical signal is the first electrical signal after the AC conversion processing; the transformer circuit is also connected to the second bridge circuit and the third bridge circuit respectively, and is used to perform voltage conversion processing on the fourth electrical signal, obtain and send a fifth electrical signal to the second bridge circuit, and obtain and send a sixth electrical signal to the third bridge circuit; the second bridge circuit is used to perform DC conversion processing on the fifth electrical signal to obtain the second electrical signal; wherein the second electrical signal is the fifth electrical signal after the DC conversion processing; the third bridge circuit is used to perform DC conversion processing on the sixth electrical signal to obtain the third electrical signal; wherein the third electrical signal is the sixth electrical signal after the DC conversion processing.

[0020] According to the above technical means, direct current is first converted into alternating current through a first bridge circuit, then transformed through a transformer circuit, and then the transformed alternating current is converted back into direct current through a second bridge circuit. This can improve the accuracy of voltage conversion, that is, improve the accuracy of the generated second signal and third signal, and further improve the accuracy of the vehicle power supply system.

[0021] Furthermore, the high-low voltage conversion controller also includes an acquisition circuit; wherein the acquisition circuit is connected to the conversion unit and is used to acquire the current value indicated by the second electrical signal and the current value indicated by the third electrical signal; the control unit is connected to the acquisition circuit and is used to receive the current value indicated by the second electrical signal and perform early warning monitoring processing according to a preset first current early warning value, and is used to receive the current value indicated by the third electrical signal and perform early warning monitoring processing according to a preset second current early warning value.

[0022] According to the above-mentioned technical means, by setting an acquisition circuit in the high-low voltage conversion controller, it is monitored whether the current value indicated by the second signal and the current value indicated by the third signal exceed the threshold value, thereby ensuring that the first power supply module and the second power supply module can operate safely, that is, the first low-voltage power supply module and the second low-voltage power supply module are subjected to early warning monitoring and processing, which can improve the safety of vehicle operation and the user's driving experience.

[0023] Furthermore, the first low-voltage power supply module includes a first low-voltage battery and a first power distribution module; wherein the first low-voltage battery is connected to the high-low voltage conversion controller and the first power distribution module, respectively; the first power distribution module is used to receive a first load start-up instruction; wherein the first load start-up instruction is used to instruct at least one first load in the first load set to start; the first power distribution module is also used to control the power supply circuit of each of the at least one first load indicated to be turned on according to the first load start-up instruction, so that the first low-voltage battery supplies power to each of the at least one first load indicated.

[0024] According to the above-mentioned technical means, the first power distribution module responds to the received first load start-up instruction, controls the power supply circuit of each of the at least one first load indicated by the first load start-up instruction to be turned on, so as to realize the first low-voltage battery supplying power to each of the at least one first load indicated by the first load start-up instruction, which can improve the accuracy of power supply by the first low-voltage power supply module and further improve the accuracy of power supply to the vehicle.

[0025] Furthermore, the first power distribution module is also connected to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation for at least one first load indicated by the first load start instruction.

[0026] According to the above technical means, the first power distribution module is connected to the high-low voltage conversion controller, so that when the first low-voltage battery is insufficient, the high-low voltage conversion controller can compensate for the power supply of at least one first load indicated by the first load start instruction, thereby improving the accuracy of power supply provided by the first low-voltage power supply module and further improving the accuracy of power supply to the vehicle.

[0027] Furthermore, the second low-voltage power supply module includes a second low-voltage battery and a second power distribution module; wherein the second low-voltage battery is connected to the high-low voltage conversion controller and the second power distribution module, respectively; the second power distribution module is used to receive a second load start-up instruction; wherein the second load start-up instruction is used to instruct at least one second load in the second load set to start; the second power distribution module is also used to control the power supply circuit of each second load in the at least one indicated second load to be turned on according to the second load start-up instruction, so that the second low-voltage battery can supply power to each second load in the at least one indicated second load.

[0028] According to the above-mentioned technical means, the second power distribution module responds to the received second load start-up instruction, controls the power supply circuit of each of the at least one second load indicated by the second load start-up instruction to be turned on, so as to realize the second low-voltage battery supplying power to each of the at least one second load indicated by the second load start-up instruction, which can improve the accuracy of power supply by the second low-voltage power supply module and further improve the accuracy of power supply to the vehicle.

[0029] Furthermore, the second power distribution module is also connected to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation for at least one second load indicated by the second load start instruction.

[0030] According to the above-mentioned technical means, by connecting the second power distribution module with the high-low voltage conversion controller, the high-low voltage conversion controller can compensate for the power supply to at least one second load indicated by the second load start instruction when the second low voltage battery is insufficient, thereby improving the accuracy of power supply by the second low voltage power supply module and further improving the accuracy of power supply to the vehicle.

[0031] Furthermore, the voltage value indicated by the second electrical signal is 48V, and the voltage value indicated by the third electrical signal is 12V.

[0032] According to the above-mentioned technical means, by supplying power to a first low-voltage power supply module that can provide a 48V voltage and a second low-voltage power supply module that can provide a 12V voltage, the normal operation of each vehicle load can be guaranteed. On the basis of improving the accuracy of the vehicle's power supply, the stability of the vehicle's operation can be improved.

[0033] Furthermore, the high-low voltage conversion controller and the first low voltage power supply module, the high-low voltage conversion controller and the first power distribution module, and the first low voltage battery and the first power distribution module are connected through a first power supply harness; the high-low voltage conversion controller and the second low voltage power supply module, the high-low voltage conversion controller and the second power distribution module, and the second low voltage battery and the second power distribution module are connected through a second power supply harness; wherein, the first power supply harness is used to transmit the second electrical signal; and the second power supply harness is used to transmit the third electrical signal.

[0034] According to the above-mentioned technical means, by providing a low-voltage power supply module that can provide a higher power supply voltage on the basis of an original low-voltage power supply module, the diameter of the overall power supply harness can be reduced, that is, the sum of the diameters of the first power supply harness and the second power supply harness. On the basis of reducing the energy consumption of the overall power supply harness, the rubber of the power supply harness is further thinned, thereby reducing the weight of the vehicle.

[0035] A car comprises a vehicle power supply system that implements the above first aspect and / or various possible implementations of the first aspect.

[0036] Beneficial effects of the present invention:

[0037] By providing two low-voltage power supply modules that provide different voltages to supply power to different load sets, the load bearing capacity of the vehicle can be improved and the energy consumption of the vehicle can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of a vehicle power supply system provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure of another vehicle power supply system provided by an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of a high-to-low voltage conversion controller provided in one embodiment of the present invention.

[0041] Among them, 100-vehicle power supply system; 1-high voltage power supply subsystem; 2-low voltage power supply subsystem; 3-high and low voltage conversion controller; 4-first low voltage power supply module; 5-second low voltage power supply module; 6-first low voltage battery; 7-first power distribution module; 8-second low voltage battery; 9-second power distribution module; 10-first power supply wiring harness; 11-second power supply wiring harness; 12-conversion unit; 13-control unit; 14-control circuit; 15-drive circuit; 16-first bridge circuit; 17-second bridge circuit; 18-third bridge circuit; 19-transformer circuit; 20-collection circuit. DETAILED DESCRIPTION

[0042] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0043] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0044] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards, and corresponding operation entrances shall be provided for users to choose to authorize or refuse.

[0045] In the prior art, during the use of a vehicle, a 12V low-voltage power supply system is usually used to power the electrical loads in the vehicle. However, the 12V low-voltage power supply system will lead to problems such as low load bearing capacity and high energy consumption.

[0046] The present invention provides two low-voltage power supply modules that provide different voltages to supply power to different load sets, thereby improving the load bearing capacity of the vehicle and reducing the energy consumption of the vehicle.

[0047] The technical solution of the present invention is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0048] Figure 1 This is a schematic diagram of the structure of a vehicle power supply system provided by an embodiment of the present invention. Figure 1 As shown, the system of the embodiment of the present invention includes: a high voltage power supply subsystem 1 and a low voltage power supply subsystem 2 .

[0049] Specifically, the high-voltage power supply subsystem 1 is a power supply subsystem for driving the vehicle. The high-voltage power supply subsystem 1 is used to send a first electrical signal to supply power to the drive motor and the low-voltage power supply subsystem 2. Among them, the present application does not limit the high-voltage power supply subsystem 1, and any power supply system that can drive the vehicle to travel, that is, send a first electrical signal to supply power to the drive motor and the low-voltage power supply subsystem 2, can be used as the high-voltage power supply subsystem 1 provided in the present application. Optionally, it can be a power battery, wherein the present application does not limit the range of voltage values ​​provided by the power battery, and any range of voltage values ​​that can drive the vehicle to travel, that is, send a first electrical signal to supply power to the drive motor and the low-voltage power supply subsystem 2, can be used as the range of voltage values ​​provided by the power battery provided in the present application, and optionally, it can be 350V-400V. Specifically, the high-voltage power supply subsystem 1, such as a power battery, after supplying power to the drive motor, the drive motor drives the wheels of the vehicle to rotate, thereby realizing vehicle travel. Specifically, after the high-voltage power supply subsystem 1, such as a power battery, supplies power to the low-voltage power supply subsystem 2, the low-voltage power supply subsystem 2 supplies power to the vehicle load, thereby realizing the vehicle load operation.

[0050] Specifically, the low-voltage power supply subsystem 2 is a power supply subsystem for supplying power to the vehicle load. Among them, the low-voltage power supply subsystem 2 includes: a high-low voltage conversion controller 3, a first low-voltage power supply module 4, and a second low-voltage power supply module 5. The high-low voltage conversion controller 3 is connected to the high-voltage power supply subsystem 1, the first low-voltage power supply module 4, and the second low-voltage power supply module 5, respectively. Specifically, the high-low voltage conversion controller (Direct Current, referred to as DCDC) is used to connect the high-voltage power supply subsystem 1, the first low-voltage power supply module 4, and the second low-voltage power supply module 5 to realize the function of converting high voltage to low voltage.

[0051] Specifically, the high-low voltage conversion controller 3 is used to receive a first electrical signal from the high-voltage power supply subsystem 1, and convert the first electrical signal into a second electrical signal and a third electrical signal. The voltage value indicated by the first electrical signal is greater than the voltage value indicated by the second electrical signal, and the voltage value indicated by the second electrical signal is greater than the voltage value indicated by the third electrical signal. The present application does not limit the setting of the voltage value indicated by the second electrical signal. Any voltage value that is less than the voltage value indicated by the first electrical signal and can supply power to the vehicle load can be used as the voltage value indicated by the second electrical signal provided in the present application, and can optionally be 48V. The present application does not limit the setting of the voltage value indicated by the third electrical signal. Any voltage value that is less than the voltage value indicated by the second electrical signal and can supply power to the vehicle load can be used as the voltage value indicated by the third electrical signal provided in the present application, and can optionally be 12V.

[0052] The first low-voltage power supply module 4 is used to receive a second electrical signal from the high-low voltage conversion controller 3 to supply power to the first load set. The rated power of each first load in the first load set is greater than or equal to a preset power threshold, for example: 12W. Specifically, the first load set includes multiple first loads, wherein the present application does not limit the number of first loads included in the first load set, and for vehicles with different configurations, that is, vehicles including different vehicle loads, the number of first loads included in the first load set is also different. The first load may be an actuator that meets the above-mentioned rated power requirements, such as: lamps, motors, water pumps, horns and other actuators; the first load may also be a controller that meets the above-mentioned rated power requirements, such as: domain controllers and other controllers.

[0053] The second low voltage power supply module 5 is used to receive a third electrical signal from the high and low voltage conversion controller 3 to supply power to the second load set. The rated power of each second load in the second load set is less than a preset power threshold, for example: 12W. Specifically, the second load set includes a plurality of second loads, wherein the present application does not limit the number of second loads included in the second load set, and for vehicles with different configurations, that is, vehicles including different vehicle loads, the number of second loads included in the second load set is also different. The second load may be an actuator that meets the above-mentioned rated power requirements, such as: steering wheel assembly, fuel pump, sensor, camera, radar and other actuators; the first load may also be a controller that meets the above-mentioned rated power requirements, such as: driving controller, Bluetooth radio frequency controller and other controllers.

[0054] Optionally, the first load and the second load can also be divided according to the working current of each vehicle load. If the working current of the vehicle load is greater than or equal to a preset current value, for example: 1A, it is divided into the first load. If the working current of the vehicle load is less than the preset current value, for example: 1A, it is divided into the second load.

[0055] The vehicle power supply system provided by the embodiment of the present invention includes a high-voltage power supply subsystem and a low-voltage power supply subsystem; wherein the low-voltage power supply subsystem includes: a high-low voltage conversion controller, a first low-voltage power supply module, and a second low-voltage power supply module; the high-low voltage conversion controller is connected to the high-voltage power supply subsystem, the first low-voltage power supply module, and the second low-voltage power supply module respectively; the high-voltage power supply subsystem is used to send a first electrical signal to supply power to the drive motor and the low-voltage power supply subsystem; the high-low voltage conversion controller is used to receive the first electrical signal from the high-voltage power supply subsystem and convert the first electrical signal into a second electrical signal and a third electrical signal; wherein the voltage value indicated by the first electrical signal is greater than the voltage value indicated by the second electrical signal, and the voltage value indicated by the second electrical signal is greater than the voltage value indicated by the third electrical signal; the first low-voltage power supply module is used to receive the second electrical signal from the high-low voltage conversion controller to supply power to the first load set Power supply; wherein the rated power of each first load in the first load set is greater than or equal to a preset power threshold; a second low-voltage power supply module is used to receive a third electrical signal from the high-low voltage conversion controller to supply power to the second load set; wherein the rated power of each second load in the second load set is less than the preset power threshold, wherein, by setting up a low-voltage power supply module that can provide a higher power supply voltage on the basis of an original low-voltage power supply module, and the process of reasonably dividing the load set of the vehicle based on the power supply voltages of the two low-voltage power supply systems, each low-voltage power supply module is used to supply power to the corresponding load set, which can improve the load bearing capacity of the vehicle, wherein, on the basis of the original low-voltage power supply module, a low-voltage power supply module that can provide a higher power supply voltage is set up, which can reduce the energy consumption on the power supply harness and further reduce the energy consumption of the vehicle.

[0056] Figure 2 A schematic diagram of the structure of another vehicle power supply system provided by an embodiment of the present invention. Figure 1 Based on the embodiment shown, the present application describes another vehicle power supply system. Figure 2 As shown, the system of the embodiment of the present invention includes:

[0057] A high voltage power supply subsystem 1 and a low voltage power supply subsystem 2. The low voltage power supply subsystem 2 includes: a high-low voltage conversion controller 3, a first low voltage power supply module 4, and a second low voltage power supply module 5. The high-low voltage conversion controller 3 is connected to the high voltage power supply subsystem 1, the first low voltage power supply module 4, and the second low voltage power supply module 5, respectively. The high voltage power supply subsystem 1 is used to send a first electrical signal to supply power to the drive motor and the low voltage power supply subsystem 2. The high-low voltage conversion controller 3 is used to receive a first electrical signal from the high voltage power supply subsystem 1 and convert the first electrical signal into a second electrical signal and a third electrical signal. The voltage value indicated by the first electrical signal is greater than the voltage value indicated by the second electrical signal, and the voltage value indicated by the second electrical signal is greater than the voltage value indicated by the third electrical signal. The first low voltage power supply module 4 is used to receive a second electrical signal from the high-low voltage conversion controller 3 to supply power to a first load set. The rated voltage of each first load in the first load set is greater than the voltage value indicated by the second electrical signal. The second low voltage power supply module 5 is used to receive a third electrical signal from the high-low voltage conversion controller 3 to supply power to the second load set, wherein the rated voltage of each second load in the second load set is less than or equal to the voltage value indicated by the second electrical signal.

[0058] For a detailed description of the above contents, please refer to Figure 1 The description in the illustrated embodiment will not be repeated here.

[0059] Optionally, the first low-voltage power supply module is also used to supply power to the high-low voltage conversion controller 3. In addition to receiving the second electrical signal from the high-low voltage conversion controller 3 as described above to supply power to the first load set, the first low-voltage power supply module 4 can also supply power to the high-low voltage conversion controller 3 so that the high-low voltage conversion controller 3 converts the first electrical signal received from the high-voltage power supply subsystem 1 into a second electrical signal and a third electrical signal, and sends the second electrical signal to the first low-voltage power supply system and the third electrical signal to the second low-voltage power supply system. The first low-voltage power supply module supplies power to the high-low voltage conversion controller 3, which can ensure the stability of the power supply of the high-voltage converter, thereby ensuring the accuracy of the high-low voltage conversion controller 3 and further improving the accuracy of the vehicle power supply.

[0060] Optionally, the first low-voltage power supply module includes a first low-voltage battery 6 and a first power distribution module 7. After receiving the second electrical signal, the first low-voltage battery 6 can store electrical energy so that the low-voltage power supply system can work normally after the vehicle is under high voltage, that is, so that the first load in the first load set can work normally; the first low-voltage battery 6 can also supply power to the first load in the first load set. The present application does not limit the type of the first low-voltage battery 6, and any battery that can store electrical energy and supply power to the first load in the first load set can be used as the first low-voltage battery 6 provided in the present application.

[0061] Among them, the first low-voltage battery 6 is connected to the high- and low-voltage conversion controller 3 and the first power distribution module 7 respectively.

[0062] Optionally, the first power distribution module 7 is used to receive a first load start instruction. The first load start instruction is used to instruct at least one first load in the first load set to start. The present application does not limit the type and quantity of the first loads indicated to start by each first load start instruction. Optionally, it can be a first load in the first load set. Optionally, it can also be several first loads in the first load set. Optionally, it can also be each first load in the first load set. The present application does not limit the process of generating and sending the first load start instruction. Optionally, it can be a voice start instruction input by the user, a start instruction generated by the user based on an operation action, or a start instruction generated by the user based on a click operation on the operation interface.

[0063] Optionally, the first power distribution module 7 is further used to control the power supply circuit of each of the at least one first load indicated to be turned on according to the first load start instruction, so that the first low-voltage battery 6 supplies power to each of the at least one first load indicated. Specifically, after controlling the power supply circuit of each of the at least one first load indicated by the first load start instruction to be turned on, the first power distribution module 7 can distribute the power of the first low-voltage battery 6 so that the first low-voltage battery 6 supplies power to each of the at least one first load indicated.

[0064] Among them, the first power distribution module responds to the received first load start-up instruction, controls the power supply circuit of each of the at least one first load indicated by the first load start-up instruction to be turned on, so as to realize the first low-voltage battery supplying power to each of the at least one first load indicated by the first load start-up instruction, which can improve the accuracy of power supply of the first low-voltage power supply module 4 and further improve the accuracy of power supply to the vehicle.

[0065] Optionally, the first power distribution module is also connected to the high-low voltage conversion controller 3 so that the high-low voltage conversion controller 3 can compensate for the power supply of at least one first load indicated by the first load start instruction. Specifically, the output power of the first low-voltage battery 6 is limited. If the first load set is powered only by the first low-voltage battery 6, it will lead to the problem of insufficient power supply efficiency. Therefore, the first power distribution module 7 can be connected to the high-low voltage conversion controller 3 so that the high-low voltage conversion controller 3 can compensate for the power supply of at least one first load indicated by the first load start instruction to ensure the power supply efficiency. Among them, by connecting the first power distribution module 7 to the high-low voltage conversion controller 3, the high-low voltage conversion controller can compensate for the power supply of at least one first load indicated by the first load start instruction when the first low-voltage battery is insufficient, which can improve the accuracy of the power supply of the first low-voltage power supply module 4 and further improve the accuracy of the power supply of the vehicle.

[0066] Optionally, the second low-voltage power supply module includes a second low-voltage battery 8 and a second power distribution module 9. After receiving the third electrical signal, the second low-voltage battery 8 can store electrical energy so that the low-voltage power supply system can work normally after the vehicle is under high voltage, that is, so that the second load in the second load set can work normally; the second low-voltage battery 8 can also supply power to the second load in the second load set. The present application does not limit the type of the second low-voltage battery 8, and any battery that can store electrical energy and supply power to the second load in the second load set can be used as the second low-voltage battery 8 provided in the present application.

[0067] The second low-voltage battery 8 is connected to the high- and low-voltage conversion controller 3 and the second power distribution module 9 respectively.

[0068] Optionally, the second power distribution module 9 is used to receive a second load start instruction. The second load start instruction is used to instruct at least one second load in the second load set to start. The present application does not limit the type and quantity of the second loads indicated to start by each second load start instruction. Optionally, it can be a second load in the second load set. Optionally, it can also be several second loads in the second load set. Optionally, it can also be each second load in the second load set. The present application does not limit the process of generating and sending the second load start instruction. Optionally, it can be a voice start instruction input by the user, a start instruction generated by the user based on an operation action, or a start instruction generated by the user based on a click operation on the operation interface.

[0069] Optionally, the second power distribution module 9 is further used to control the power supply circuit of each of the at least one second load indicated to be turned on according to the second load start instruction, so that the second low-voltage battery 8 supplies power to each of the at least one second load indicated. Specifically, after controlling the power supply circuit of each of the at least one second load indicated by the second load start instruction to be turned on, the second power distribution module 9 can distribute the power of the second low-voltage battery 8 so that the second low-voltage battery 8 supplies power to each of the at least one second load indicated.

[0070] Among them, the second power distribution module responds to the received second load start-up instruction, controls the power supply circuit of each of the at least one second load indicated by the second load start-up instruction to be turned on, so as to realize the second low-voltage battery supplying power to each of the at least one second load indicated by the second load start-up instruction, which can improve the accuracy of power supply by the second low-voltage power supply module 5 and further improve the accuracy of power supply to the vehicle.

[0071] Optionally, the second power distribution module is also connected to the high-low voltage conversion controller 3 so that the high-low voltage conversion controller 3 can compensate for the power supply of at least one second load indicated by the second load start instruction. Specifically, the output power of the second low-voltage battery 8 is limited. If the second load set is powered only by the second low-voltage battery 8, it will lead to the problem of insufficient power supply efficiency. Therefore, the second power distribution module 9 can be connected to the high-low voltage conversion controller 3 so that the high-low voltage conversion controller 3 can compensate for the power supply of at least one second load indicated by the second load start instruction to ensure the power supply efficiency. Among them, by connecting the second power distribution module 9 to the high-low voltage conversion controller 3, the high-low voltage conversion controller can compensate for the power supply of at least one second load indicated by the second load start instruction when the second low-voltage battery is insufficient, which can improve the accuracy of the power supply of the second low-voltage power supply module 5 and further improve the accuracy of the power supply of the vehicle.

[0072] Optionally, the voltage value indicated by the second electrical signal is 48 V, and the voltage value indicated by the third electrical signal is 12 V. Specifically, the vehicle loads of the existing vehicle, when powered by the first low-voltage power supply module 4 that can provide a voltage of 48 V, and the second low-voltage power supply module 5 that can provide a voltage of 12 V, can ensure the normal operation of each vehicle load, and on the basis of improving the accuracy of the vehicle power supply, the stability of the vehicle operation can be improved.

[0073] The high-low voltage conversion controller and the first low voltage power supply module 4, the high-low voltage conversion controller 3 and the first power distribution module 7, and the first low voltage battery 6 and the first power distribution module 7 are connected through the first power supply harness 10. The high-low voltage conversion controller 3 and the second low voltage power supply module 5, the high-low voltage conversion controller 3 and the second power distribution module 9, and the second low voltage battery 8 and the second power distribution module 9 are connected through the second power supply harness 11. Among them, the first power supply harness 10 is used to transmit the second electrical signal. The second power supply harness 11 is used to transmit the third electrical signal. Specifically, by providing a low voltage power supply module that can provide a higher power supply voltage on the basis of an original low voltage power supply module, the diameter of the overall power supply harness can be reduced, that is, the sum of the diameters of the first power supply harness and the second power supply harness. On the basis of reducing the energy consumption of the overall power supply harness, the rubber of the power supply harness is further thinned, thereby reducing the weight of the vehicle.

[0074] The vehicle power supply system provided by the embodiment of the present invention comprises: Figure 1 On the basis of the illustrated embodiment, by combining the first low-voltage battery and the first power distribution module, the accuracy of the power supply of the first low-voltage power supply module can be improved, and the accuracy of the power supply of the vehicle can be further improved. By connecting the first power distribution module to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation, the accuracy of the power supply of the first low-voltage power supply module can be improved, and the accuracy of the power supply of the vehicle can be further improved. By combining the second low-voltage battery and the second power distribution module, the accuracy of the power supply of the second low-voltage power supply module can be improved, and the accuracy of the power supply of the vehicle can be further improved. By connecting the second power distribution module to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation, the accuracy of the power supply of the second low-voltage power supply module can be improved, and the accuracy of the power supply of the vehicle can be further improved. By combining the 48V and 12V voltage values, the stability of the vehicle operation can be improved. By combining two low-voltage power supply modules and two power supply harnesses, the energy loss on the power supply harness can be reduced, and the diameter of the power supply harness can be further reduced, and the harness rubber can be thinned, thereby reducing the weight of the vehicle. In summary, the vehicle power supply system provided by this embodiment has Figure 1 On the basis of the illustrated embodiment, the accuracy of vehicle power supply is improved, the stability of vehicle operation is improved, and the weight of the vehicle is reduced.

[0075] Figure 3 This is a schematic diagram of the structure of a high-low voltage conversion controller provided by an embodiment of the present invention. Figure 1 or Figure 2 Based on the embodiment shown in the figure, this embodiment describes the structure of the high and low voltage conversion controller. Figure 3As shown, the high-low voltage conversion controller provided by the embodiment of the present invention includes a control unit 12 and a conversion unit 13. Among them, the first low voltage power supply module is connected to the control unit 12 and is used to supply power to the control unit 12 in the high-low voltage conversion controller 3. Figure 2 In the description of the illustrated embodiment, the first low voltage power supply module 4 is also used to supply power to the high-low voltage conversion controller 3 . Specifically, the first low voltage power supply module 4 is used to supply power to the control unit 12 in the high-low voltage conversion controller 3 .

[0076] Among them, the control unit 12 is connected to the conversion unit 13, and is used to receive the high-low voltage conversion start instruction, and according to the high-low voltage conversion start instruction, generate and send the conversion control instruction to the conversion unit 13. Specifically, the high-low voltage conversion start instruction is used to indicate the start of the high-low voltage conversion, wherein the present application does not limit the process of generating and sending the first load start instruction. Specifically, the conversion control instruction is used to control the conversion unit 13 to perform high-low voltage conversion. Among them, the conversion unit 13 is also connected to the high-voltage power supply subsystem 1, the first low-voltage power supply module 4, and the second low-voltage power supply module 5, respectively, and is used to convert the first electrical signal received from the high-voltage power supply subsystem 1 into a second electrical signal and a third electrical signal after receiving the conversion control instruction, and send the second electrical signal to the first low-voltage power supply module 4, and send the third electrical signal to the second low-voltage power supply module 5.

[0077] Among them, by controlling the conversion unit to start the high-low voltage conversion in response to the high-low voltage conversion start instruction, the safety and accuracy of the vehicle power supply system can be further improved. By controlling the conversion unit to convert and generate the second electrical signal and the third electrical signal, electrical signals are provided to the first low-voltage power supply module and the second low-voltage power supply module, thereby realizing the power supply of the vehicle power supply system, improving the load bearing capacity of the vehicle, and reducing the energy consumption of the vehicle.

[0078] Among them, the present application does not limit the control unit 12 included in the high-low voltage conversion controller 3. Any unit that can be used to receive a high-low voltage conversion start instruction and generate and send a conversion control instruction to the conversion unit 13 based on the high-low voltage conversion start instruction can be used as the control unit 12 provided by the present application.

[0079] Optionally, the control unit includes a control circuit 14 and a drive circuit 15. The control circuit 14 is connected to the drive circuit 15 and the first low-voltage power supply module 4, respectively, and is used to generate and send an initial conversion control instruction to the drive circuit 15 according to the received high-low voltage conversion start instruction. The drive circuit 15 is used to amplify the initial conversion control instruction, obtain and send the conversion control instruction to the conversion unit 13. Specifically, since the power of the initial conversion control instruction is relatively small, the initial conversion control instruction can be amplified by the drive circuit 15 to obtain a conversion control instruction that can control the conversion unit 13 to perform high-low voltage conversion. By amplifying the initial conversion control instruction issued by the control circuit by the drive circuit 15, the accuracy of the generated conversion control instruction can be improved, thereby improving the accuracy of the high-low voltage conversion, and further improving the accuracy of the vehicle power supply system 100.

[0080] Among them, the present application does not limit the conversion unit 13 included in the high-low voltage conversion controller 3. Any unit that can be used to convert the first electrical signal received from the high-voltage power supply subsystem 1 into a second electrical signal and a third electrical signal after receiving a conversion control instruction, and send the second electrical signal to the first low-voltage power supply module 4 and send the third electrical signal to the second low-voltage power supply module 5 can be used as the conversion unit 13 provided by the present application.

[0081] Optionally, the conversion unit includes a first bridge circuit 16, a second bridge circuit 17, a third bridge circuit 18, and a transformer circuit 19. The first bridge circuit 16 is connected to the high-voltage power supply subsystem 1, the control unit 12, and the transformer circuit 19, and is used to perform AC conversion processing on the first electrical signal according to the control of the conversion control instruction, and obtain and send a fourth electrical signal to the transformer circuit 19. The fourth electrical signal is the first electrical signal after the AC conversion processing. The transformer circuit 19 is also connected to the second bridge circuit 17 and the third bridge circuit 18 respectively, and is used to perform voltage conversion processing on the fourth electrical signal, obtain and send a fifth electrical signal to the second bridge circuit 17, and obtain and send a sixth electrical signal to the third bridge circuit 18. The second bridge circuit 17 is used to perform DC conversion processing on the fifth electrical signal to obtain a second electrical signal. The second electrical signal is the fifth electrical signal after the DC conversion processing. The third bridge circuit 18 is used to perform DC conversion processing on the sixth electrical signal to obtain a third electrical signal. The third electrical signal is the sixth electrical signal after the DC conversion processing. Specifically, in the process of the first bridge circuit 16 performing AC conversion processing on the first electrical signal according to the control of the conversion control instruction, the fourth signal obtained by the conversion is controlled by adjusting the duty cycle of the first bridge circuit 16, so that the fourth signal is transformed by the transformer circuit 19 to obtain the fifth signal and the sixth signal. Among them, the DC power is first converted into AC power by the first bridge circuit, and then the voltage is transformed by the transformer circuit, and then the AC power after the voltage transformation is converted back to DC power by the second bridge circuit, which can improve the accuracy of voltage conversion, that is, improve the accuracy of the generated second electrical signal and the third electrical signal, and further improve the accuracy of the vehicle power supply system 100.

[0082] Optionally, the high-low voltage conversion controller also includes an acquisition circuit 20. The acquisition circuit 20 is connected to the conversion unit 13 and is used to collect the current value indicated by the second electrical signal and the current value indicated by the third electrical signal. The control unit 12 is connected to the acquisition circuit 20 and is used to receive the current value indicated by the second electrical signal and perform early warning monitoring processing according to the preset first current early warning value, and is used to receive the current value indicated by the third electrical signal and perform early warning monitoring processing according to the preset second current early warning value. Specifically, since each first load in the first load set is respectively connected to the first low-voltage power supply module 4, that is, each first load in the first load set is in parallel, therefore, the more the number of first loads started, the smaller the load resistance, and the greater the current value indicated by the second electrical signal under the premise of ensuring that the voltage value indicated by the second electrical signal is certain, wherein, if the current value indicated by the second electrical signal is higher than the preset first current early warning value, early warning prompt processing can be performed, and / or, the current value indicated by the second electrical signal can be reduced. Specifically, since each second load in the second load set is respectively connected to the second low-voltage power supply module 5, that is, each second load in the second load set is in parallel, the more second loads are started, the smaller the load resistance is, and the greater the current value indicated by the third electrical signal is under the premise of ensuring that the voltage value indicated by the third electrical signal is constant, wherein, if the current value indicated by the second electrical signal is higher than the preset second current warning value, then a warning prompt processing can be performed, and / or the current value indicated by the third electrical signal can be reduced. Among them, by setting the acquisition circuit 20 in the high-low voltage conversion controller 3, it is monitored whether the current value indicated by the second signal and the current value indicated by the third signal exceed the threshold value, so as to ensure that the first power supply module and the second power supply module can operate safely, that is, the first low-voltage power supply module 4 and the second low-voltage power supply module 5 are subjected to early warning monitoring processing, which can improve the safety of vehicle operation and the driving experience of users.

[0083] The high-low voltage conversion controller provided in the embodiment of the present invention can improve the accuracy of the high-low voltage conversion performed by the high-low voltage conversion controller by combining the control unit and the conversion unit, thereby further improving the accuracy of the vehicle power supply system.

[0084] The present invention further provides a car, comprising the vehicle power supply system 100 shown in any of the above embodiments.

[0085] Finally, it should be noted that the above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A vehicle power supply system, characterized in that: The system comprises: a high-voltage power supply subsystem and a low-voltage power supply subsystem; wherein the low-voltage power supply subsystem comprises: a high-low voltage conversion controller, a first low-voltage power supply module, and a second low-voltage power supply module; the high-low voltage conversion controller is connected to the high-voltage power supply subsystem, the first low-voltage power supply module, and the second low-voltage power supply module respectively; The high voltage power supply subsystem is used to send a first electrical signal to supply power to the drive motor and the low voltage power supply subsystem; The high-low voltage conversion controller is used to receive the first electrical signal from the high-voltage power supply subsystem and convert the first electrical signal into a second electrical signal and a third electrical signal; wherein the voltage value indicated by the first electrical signal is greater than the voltage value indicated by the second electrical signal, and the voltage value indicated by the second electrical signal is greater than the voltage value indicated by the third electrical signal; The first low-voltage power supply module is used to receive the second electrical signal from the high-low voltage conversion controller to supply power to a first load set; wherein the rated power of each first load in the first load set is greater than or equal to a preset power threshold; The second low voltage power supply module is used to receive the third electrical signal from the high-low voltage conversion controller to supply power to a second load set; wherein the rated power of each second load in the second load set is less than the preset power threshold.

2. The system according to claim 1, characterized in that The first low voltage power supply module is also used to supply power to the high and low voltage conversion controller.

3. The system according to claim 2, characterized in that The high-low voltage conversion controller includes a control unit and a conversion unit; The first low voltage power supply module is connected to the control unit and is used to supply power to the control unit in the high and low voltage conversion controller; The control unit is connected to the conversion unit, and is used to receive a high-low voltage conversion start instruction, and generate and send a conversion control instruction to the conversion unit according to the high-low voltage conversion start instruction; The conversion unit is also connected to the high-voltage power supply subsystem, the first low-voltage power supply module, and the second low-voltage power supply module, respectively, and is used to convert the first electrical signal received from the high-voltage power supply subsystem into the second electrical signal and the third electrical signal after receiving the conversion control instruction, and send the second electrical signal to the first low-voltage power supply module, and send the third electrical signal to the second low-voltage power supply module.

4. The system according to claim 3, characterized in that The control unit includes a control circuit and a drive circuit; The control circuit is connected to the drive circuit and the first low-voltage power supply module respectively, and is used to generate and send an initial conversion control instruction to the drive circuit according to the received high-low voltage conversion start instruction; The driving circuit is used to amplify the initial conversion control instruction, obtain and send the conversion control instruction to the conversion unit.

5. The system according to claim 3, characterized in that The conversion unit includes a first bridge circuit, a second bridge circuit, a third bridge circuit, and a voltage transformation circuit; The first bridge circuit is connected to the high-voltage power supply subsystem, the control unit, and the transformer circuit, and is used to perform AC conversion processing on the first electrical signal according to the control of the conversion control instruction, and obtain and send a fourth electrical signal to the transformer circuit; wherein the fourth electrical signal is the first electrical signal after the AC conversion processing; The voltage transformation circuit is also connected to the second bridge circuit and the third bridge circuit respectively, and is used to transform the fourth electrical signal, obtain and send a fifth electrical signal to the second bridge circuit, and obtain and send a sixth electrical signal to the third bridge circuit; The second bridge circuit is used to perform DC conversion processing on the fifth electrical signal to obtain the second electrical signal; wherein the second electrical signal is the fifth electrical signal after the DC conversion processing; The third bridge circuit is used to perform DC conversion processing on the sixth electrical signal to obtain the third electrical signal; wherein the third electrical signal is the sixth electrical signal after DC conversion processing.

6. The system according to claim 3, characterized in that The high-low voltage conversion controller also includes a collection circuit; Wherein, the acquisition circuit is connected to the conversion unit and is used to acquire the current value indicated by the second electrical signal and the current value indicated by the third electrical signal; The control unit is connected to the acquisition circuit, and is used to receive the current value indicated by the second electrical signal, and perform early warning monitoring processing according to the preset first current early warning value, and is used to receive the current value indicated by the third electrical signal, and perform early warning monitoring processing according to the preset second current early warning value.

7. The system according to claim 2, characterized in that The first low-voltage power supply module includes a first low-voltage battery and a first power distribution module; Wherein, the first low-voltage battery is connected to the high-low voltage conversion controller and the first power distribution module respectively; The first power distribution module is used to receive a first load start instruction; wherein the first load start instruction is used to instruct at least one first load in the first load set to start; The first power distribution module is also used to control the power supply circuit of each of the at least one indicated first load to be turned on according to the first load start instruction, so that the first low-voltage battery can supply power to each of the at least one indicated first load.

8. The system according to claim 7, characterized in that The first power distribution module is also connected to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation for at least one first load indicated by the first load start instruction.

9. The system according to claim 1, characterized in that The second low-voltage power supply module includes a second low-voltage battery and a second power distribution module; Wherein, the second low-voltage battery is connected to the high-low voltage conversion controller and the second power distribution module respectively; The second power distribution module is used to receive a second load start instruction; wherein the second load start instruction is used to instruct at least one second load in the second load set to start; The second power distribution module is also used to control the power supply circuit of each of the at least one second load indicated to be turned on according to the second load start instruction, so that the second low-voltage battery can supply power to each of the at least one second load indicated.

10. The system according to claim 9, characterized in that The second power distribution module is also connected to the high-low voltage conversion controller so that the high-low voltage conversion controller performs power supply compensation for at least one second load indicated by the second load start instruction.

11. The system according to any one of claims 1 to 10, characterized in that: The voltage value indicated by the second electrical signal is 48V, and the voltage value indicated by the third electrical signal is 12V.

12. The system according to claim 11, characterized in that The high-low voltage conversion controller and the first low voltage power supply module, the high-low voltage conversion controller and the first power distribution module, and the first low voltage battery and the first power distribution module are connected through a first power supply harness; the high-low voltage conversion controller and the second low voltage power supply module, the high-low voltage conversion controller and the second power distribution module, and the second low voltage battery and the second power distribution module are connected through a second power supply harness; wherein the first power supply harness is used to transmit the second electrical signal; and the second power supply harness is used to transmit the third electrical signal.

13. A car, characterized in that: A vehicle power supply system comprising any one of claims 1-12.

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