Signal measurement and control circuit and system for low voltage system of vehicle, and new energy vehicle

Abstract

A signal measurement and control circuit and system for a low voltage system of a vehicle, and a new energy vehicle. By means of the design of a power supply module (11), a signal module (12) and a central control module (13), the circuit is separated into an electrical portion and a signal portion; the central control module (13) is connected to the power supply module (11) and the signal module (12) by means of signal wires; the power supply module (11) is connected to an external high voltage power supply voltage by means of an electrical wire and connected to each low voltage electrical appliance (14) by means of an electrical wire, and the power supply module (11) processes the high voltage power supply voltage, generates a target power supply voltage meeting a preset condition, and supplies power to each low voltage electrical appliance (14) on the basis of the target power supply voltage; and the central control module (13) performs signal interaction and data processing with each component in the circuit, and initiates a control instruction to the signal module (12). Thus, by means of the design of circuit separation and central control of the circuit, the efficiency and effectiveness of signal measurement, control and analysis of the low voltage power supply system of the new energy vehicle are improved.

Description

Automotive low-voltage system signal measurement and control circuits and systems and new energy vehicles

[0001] This application claims priority to Chinese Patent Application No. 2024104865220, filed on April 22, 2024, entitled "Automotive Low-Voltage System Signal Measurement and Control Circuit, System and New Energy Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to automotive electronics technology, and more particularly to a signal measurement and control circuit and system for automotive low-voltage systems, and to new energy vehicles. Background Technology

[0003] The current low-voltage system signal measurement and control circuit of new energy vehicles needs to acquire and analyze the electrical parameters of each power supply signal processing module. Therefore, it is necessary to design the power supply signal processing module and signal circuit separately in advance. In order to ensure the effectiveness of low-voltage system signal measurement and control of new energy vehicles, it is necessary to first ensure the flexibility and safety of the design of the power supply signal processing module.

[0004] The power supply signal processing module mainly uses hard-wired, stamped-plate, or PCB-based low-voltage power supply devices. However, current power supply signal processing modules suffer from low flexibility and complex design and debugging, resulting in low flexibility and efficiency in acquiring and analyzing low-voltage system signals in new energy vehicles. Therefore, a signal measurement and control circuit for automotive low-voltage systems is needed to improve the efficiency and effectiveness of signal detection, control, and analysis in new energy vehicles. Summary of the Invention

[0005] This application provides a signal measurement and control circuit, system, and new energy vehicle for automotive low-voltage systems, which solves the problems of low flexibility and complex design and debugging in existing automotive low-voltage system power supply signal processing modules, resulting in low flexibility and efficiency in acquiring and analyzing low-voltage system signals in new energy vehicles.

[0006] In a first aspect, this application provides a signal measurement and control circuit for a low-voltage automotive system. The circuit is applied to a target vehicle that uses electrical energy as its power source. The circuit includes:

[0007] Power supply module, signal module, and central control module;

[0008] The power supply module is used to process the high-voltage power supply voltage, generate a target power supply voltage that meets preset conditions, and supply power to each low-voltage electrical appliance according to the target power supply voltage.

[0009] The central control module is used to interact with the signal module, process or store the detection data in the signal module, and drive the signal module to perform signal acquisition, signal processing or signal transmission functions through instruction data.

[0010] Furthermore, the central control module is connected to the power supply module and the signal module via signal lines, and the power supply module is connected to the high-voltage power supply voltage via electrical lines, and is also connected to each of the low-voltage electrical appliances via electrical lines.

[0011] As an optional implementation, the power supply module includes a DC-DC converter output module and multiple power supply branches, each power supply branch including a power supply signal processing module and at least one low-voltage electrical appliance.

[0012] The first end of each power supply signal processing module is interconnected with each other via electrical lines and signal lines, and is connected to the output end of the DC-DC converter output module. The first end of each power supply signal processing module is connected to the central control module via a signal line. The second end of each power supply signal processing module is connected to the low-voltage electrical appliance of the corresponding power supply branch via an electrical line. The input end of the DC-DC converter output module is connected to the high-voltage power supply voltage via an electrical line. The signal end of the DC-DC converter output module is connected to the signal module via a signal line.

[0013] As an optional implementation, the power supply signal processing module includes a power chip module and a transistor module;

[0014] The power chip module is connected to the DC-DC converter output module, the driving terminal of the transistor module is connected to the power chip module, the first terminal of the transistor module is connected to the low-voltage electrical appliance on the corresponding power supply branch, and the second terminal of the transistor module is grounded.

[0015] As an optional implementation, the signal module includes a first detection module, which is connected to the power supply module via a signal line. The first detection module is used to detect the electrical parameters of the power supply module.

[0016] Furthermore, the first detection module may be integrated into the central control module, or integrated into the signal module, or set up independently of the central control module and the signal module;

[0017] Furthermore, if the first detection module is set up independently of the central control module and the signal module, or if the first detection module is integrated into the signal module, then the first detection module is connected to the central control module via a signal line.

[0018] As an optional implementation, the signal module further includes a second detection module, which is used to detect the operating parameters of the target vehicle during its overall operation.

[0019] Furthermore, the central control module is also used to determine the operating status of the target vehicle and / or each of the low-voltage electrical appliances based on the operating parameters of the target vehicle during its overall operation and the electrical parameters of the power supply module.

[0020] As an optional implementation, the signal module further includes a communication module, which includes an internal communication module and an external communication module;

[0021] The communication module is connected to the central control module via a signal line and is used to communicate and interact with other working areas inside the target vehicle, external devices, or external cloud data platforms according to the instruction data of the central control module.

[0022] As an optional implementation, the internal communication module includes a controller area network bus transceiver module and a domain controller, and the internal communication module is used to communicate and exchange data with other working systems inside the target vehicle;

[0023] The controller LAN bus transceiver module is connected to the central control module via a signal line and to the domain controller via a signal line. The controller LAN bus transceiver module transmits the target data in the central control module to the domain controller via the controller LAN bus signal channel. The domain controller transmits the target data to the domain controllers corresponding to other working domains in the target vehicle via the Ethernet connection inside the target vehicle.

[0024] As an optional implementation, the external communication module includes a data acquisition module and / or an antenna module. The data acquisition module is used for wired communication data interaction with external devices, and the antenna module is used for wireless communication data interaction with an external cloud data platform.

[0025] The data acquisition module and the antenna module are connected to the domain controller via signal lines.

[0026] Secondly, this application provides an automotive low-voltage system signal measurement and control system, the system including, as in the first aspect, an automotive low-voltage system signal measurement and control circuit, low-voltage electrical appliances, and a remote device equipped with the cloud data platform.

[0027] Thirdly, this application provides a new energy vehicle, which includes the vehicle low-voltage system signal measurement and control circuit as described in the first aspect.

[0028] The automotive low-voltage system signal measurement and control circuit, system, and new energy vehicle provided in this application, through the design of a power supply module, a signal module, and a central control module, separates the circuit into electrical and signal parts. The central control module is connected to the power supply module and the signal module via signal lines. The power supply module is connected to the external high-voltage power supply via electrical lines and also to each low-voltage electrical appliance via electrical lines. The power supply module processes the high-voltage power supply to generate a target power supply voltage that meets preset conditions, and supplies power to each low-voltage electrical appliance according to the target power supply voltage. The central control module interacts with the components in the circuit for signal exchange and data processing, and sends control commands to the signal module. Thus, by separating the circuit loops and implementing a central control design, the efficiency and effectiveness of signal detection, control, and analysis in the low-voltage power supply system of new energy vehicles are improved. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] Figure 1 is a schematic diagram of the structure of a signal measurement and control circuit for an automotive low-voltage system disclosed in an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the structure of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of the structure of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of the structure of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention.

[0035] Reference numerals: Power supply module, 11; Signal module, 12; Central control module, 13; Low-voltage electrical appliances, 14; DC-DC converter output module, 21; Power supply branch, 22; Power supply signal processing module, 23; Power chip module, 24; Transistor module, 25; First detection module, 31; Second detection module, 32; Communication module, 41; Internal communication module, 42; External communication module, 43; Controller area network bus transceiver module, 44; Domain controller, 45; Data acquisition module, 46; Antenna module, 47; External devices, 48; Cloud data platform, 49;

[0036] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept of this application in any way, but rather to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0038] The current low-voltage system signal measurement and control circuit of new energy vehicles needs to acquire and analyze the electrical parameters of each power supply signal processing module. Therefore, it is necessary to design the power supply signal processing module and signal circuit separately in advance. In order to ensure the effectiveness of low-voltage system signal measurement and control of new energy vehicles, it is necessary to first ensure the flexibility and safety of the design of the power supply signal processing module.

[0039] As vehicles become increasingly electrified and intelligent, the demand for intelligent vehicle power distribution is also rising. Traditional power distribution systems often use fuses, relays, and circuit boards, which have the following drawbacks: lack of circuit fault detection and feedback, making troubleshooting difficult if a problem occurs in a circuit; functional safety cannot be guaranteed; lack of circuit current / voltage monitoring makes power consumption control difficult; and it does not support Over-the-Air (OTA) upgrades.

[0040] Specifically, typical automotive low-voltage power distribution devices currently on the market include hard-wired, stamped-plate, and printed circuit board (PCB) types. Hard-wired power distribution boxes have limited circuit shunting / contact points, and their terminal / busbar-based design is not conducive to circuit design and modification. With the increasing demand for more complex subsystem functions, stamped-plate fuse boxes have become more widely used. Compared to hard-wired boxes, stamped-plate power distribution boxes offer the advantage of increased circuit shunting capacity, but they are also less conducive to circuit design modifications and have higher costs. PCB power distribution boxes offer flexible current arrangement, easier circuit design updates, greater variability in circuit shunting and contacts, and support for integrated electronic components, but their cost is slightly higher and they require a higher level of expertise from the design team.

[0041] In summary, the current power supply signal processing modules suffer from low flexibility and complex design and debugging, resulting in low flexibility and efficiency in acquiring and analyzing low-voltage system signals in new energy vehicles. Therefore, a signal measurement and control circuit for automotive low-voltage systems is needed to improve the efficiency and effectiveness of signal detection, control, and analysis in new energy vehicles.

[0042] This application provides an intelligent low-voltage power distribution system, which mainly comprises a central control module, a Controller Area Network (CAN) transceiver module, a signal processing module, a voltage detection module, a temperature detection module, a current conversion circuit, a diagnostic interface, a domain controller, an antenna module, a vehicle-to-everything (V2X) time-sharing protocol (TSP) transmission, and a cloud data platform. Compared with traditional low-voltage power distribution solutions, it has advantages such as low weight, high functional safety level, support for OTA upgrades, support for fault detection and diagnosis, convenient power consumption management, and support for cloud-based big data analysis.

[0043] Specifically, one implementation of this application uses a power chip and field-effect transistor combined as a power supply signal processing module, which can provide power distribution, overload protection, and reverse protection for various low-voltage electrical devices. The central control module, as the brain of the system, is mainly responsible for processing and storing CAN signals, hard-wired signals, system power supply signal processing module signals, voltage and temperature signals. The CAN transceiver module is mainly responsible for network communication between the domain controller's CAN signals and the central control module. The signal processing module is mainly responsible for the conversion of external hard-wired signals. The domain controller is mainly responsible for communication between external signals and the CAN transceiver module. The antenna module uploads the loop current and voltage signals to the cloud through the vehicle network TSP.

[0044] In general, the technical concept of this application lies in separating the circuit into electrical and signal components through the design of a power supply module, a signal module, and a central control module. The central control module is connected to the power supply module and the signal module via signal lines. The power supply module is connected to the external high-voltage power supply via electrical lines and also to various low-voltage electrical appliances. The power supply module processes the high-voltage power supply to generate a target power supply voltage that meets preset conditions, and then supplies power to the various low-voltage electrical appliances according to the target power supply voltage. The central control module interacts with the components in the circuit for signal processing and data processing, and sends control commands to the signal module. Therefore, by separating the circuit loops and implementing a central control design, the efficiency and effectiveness of signal detection, control, and analysis in the low-voltage power supply system of new energy vehicles are improved.

[0045] Please refer to Figure 1, which is a schematic diagram of the structure of a signal measurement and control circuit for an automotive low-voltage system disclosed in an embodiment of the present invention. As shown in Figure 1, this application provides a signal measurement and control circuit for an automotive low-voltage system. The circuit is applied to a target vehicle that uses electrical energy as its power source. The circuit includes:

[0046] Power supply module 11, signal module 12 and central control module 13;

[0047] The power supply module 11 is used to process the high voltage power supply voltage, generate a target power supply voltage that meets the preset conditions, and supply power to each low voltage appliance 14 according to the target power supply voltage.

[0048] The power supply module can be designed with appropriate power electronic devices or digital and analog circuit devices to transform the power supply voltage or current according to the actual application scenario, so as to obtain the target power supply voltage that meets the preset conditions, and supply power to each low-voltage electrical appliance 14 according to the target power supply voltage.

[0049] The central control module 13 is used to interact with the signal module 12, process or store the detection data in the signal module 12, and drive the signal module 12 to perform signal acquisition, signal processing or signal transmission functions through instruction data.

[0050] The central control module 13 can be implemented as a microcontroller or other embedded microprocessor / microcontroller, or as a processor platform equipped with an in-vehicle operating system, etc., and is used to control the interaction of detection signals or control signals during the signal measurement and control process of the automotive low-voltage system.

[0051] In addition, the central control module 13 is connected to the power supply module 11 and the signal module 12 via signal lines. The power supply module 11 is connected to the high voltage power supply via electrical lines and to each low voltage appliance 14 via electrical lines.

[0052] For ease of understanding, electrical circuits and signal circuits are separated in this application; however, in some application scenarios, they can be used together. In the accompanying drawings, dashed lines between modules represent electrical circuits, and solid lines represent control circuits. Furthermore, in some application scenarios, signal module 12 and power supply module 11 can also be connected via signal lines to achieve interaction between detection and control signals.

[0053] It should be noted that, for the automotive low-voltage system signal measurement and control circuit provided in this application, the main target of electrical signal measurement and control is the various low-voltage electrical appliances 14 on the vehicle. Therefore, when discussing this measurement and control circuit separately, the low-voltage electrical appliance 14 can be understood as an interface, and the low-voltage electrical appliance 14 is an external electrical device of the circuit. However, for ease of understanding in subsequent embodiments, the low-voltage electrical appliance 14 is included as part of the power supply module 11 in later embodiments and described in principle as a whole, while it is described separately in this embodiment. Those skilled in the art should understand that whether the low-voltage electrical appliance 14 is included in the overall circuit discussion does not affect the innovation of the electrical and signal parts of the circuit itself, or the design of the central control part. Only in practical application scenarios, considering the understanding of the principle, can it be included in the circuit itself for discussion or can it be separated from the circuit for discussion.

[0054] By designing the power supply module 11, signal module 12, and central control module 13, the circuit is separated into electrical and signal components. The central control module 13 is connected to the power supply module 11 and signal module 12 via signal lines. The power supply module 11 is connected to the external high-voltage power supply via electrical lines and also to each low-voltage appliance 14 via electrical lines. The power supply module 11 processes the high-voltage power supply to generate a target power supply voltage that meets preset conditions, and supplies power to each low-voltage appliance 14 according to the target power supply voltage. The central control module 13 interacts with the components in the circuit for signal processing and sends control commands to the signal module 12. Thus, by separating the circuit loops and implementing a central control design, the efficiency and effectiveness of signal detection, control, and analysis in the low-voltage power supply system of new energy vehicles are improved.

[0055] Please refer to Figure 2, which is a schematic diagram of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention. As shown in Figure 2, as an optional implementation, the power supply module 11 includes a DC-DC converter output module 21 and multiple power supply branches 22. Each power supply branch 22 includes a power supply signal processing module 23 and at least one low-voltage electrical appliance 14.

[0056] The figure shows a simplified implementation consisting of two power supply branches, one of which is also shown as a ground-based implementation. This implementation is only an optional solution, and the design of the specific power supply module and the selection of components depend on the actual application scenario.

[0057] The first end of each power supply signal processing module 23 is interconnected with each other through electrical lines and signal lines, and is connected to the output end of the DC-DC converter output module 21. The first end of each power supply signal processing module 23 is connected to the central control module 13 through a signal line. The second end of each power supply signal processing module 23 is connected to the low-voltage electrical appliance 14 of the corresponding power supply branch 22 through an electrical line. The input end of the DC-DC converter output module 21 is connected to the high-voltage power supply voltage through an electrical line. The signal end of the DC-DC converter output module 21 is connected to the signal module 12 through a signal line.

[0058] The DC-DC converter output module is used to convert the amplitude of external high-voltage power supply signals, usually the voltage provided by the vehicle's power supply battery, into DC power supply signals suitable for each power supply branch. Subsequently, through the power supply signal processing module of each branch, power can be supplied to the low-voltage electrical appliances on the corresponding branch. Thus, on the one hand, signal isolation and circuit protection of low-voltage electrical appliances can be achieved, and on the other hand, the working status of each power supply branch can be detected and controlled separately.

[0059] The DC-DC converter output module 21 processes the external high-voltage power supply signal and connects to multiple power supply branches 22. Each power supply branch 22 includes a power supply signal processing module 23 for processing electrical signals and corresponding low-voltage electrical appliances 14. The first end of each power supply signal processing module 23 is interconnected via electrical and signal lines and connected to the output end of the DC-DC converter output module 21. The first end of each power supply signal processing module 23 is connected to the central control module 13 via a signal line. The second end of each power supply signal processing module 23 is connected to the low-voltage electrical appliance 14 of the corresponding power supply branch 22 via electrical lines. The input end of the DC-DC converter output module 21 is connected to the high-voltage power supply voltage via electrical lines, and the signal end of the DC-DC converter output module 21 is connected to the signal module 12 via a signal line. The power supply voltage is processed and detected via electrical lines, and the information exchange between detection and control signals is achieved via signal lines. Thus, by designing the circuit with loop separation and central control, the efficiency and effectiveness of signal detection, control, and analysis in the low-voltage power supply system of new energy vehicles are improved.

[0060] As an optional implementation, the power supply signal processing module 23 includes a power chip module 24 and a transistor module 25;

[0061] The power chip module 24 is connected to the DC-DC converter output module 21, the driving end of the transistor module 25 is connected to the power chip module 24, the first end of the transistor module 25 is connected to the low-voltage appliance 14 on the corresponding power supply branch 22, and the second end of the transistor module 25 is grounded.

[0062] As mentioned earlier, in a specific implementation, power chip modules, such as insulated gate bipolar transistors (IGBTs), can be used to connect to external field-effect transistors to achieve signal control and isolation of the power supply circuit. Multiple outputs on the same IGBT can also be multiplexed through multiple field-effect transistors and connected to different power supply circuits.

[0063] In addition, transistor modules can also be other components capable of electrical signal control under the control of drive signals, and power chip modules can also be implemented in other ways.

[0064] The power chip module 24 and transistor module 25 are connected to realize the processing of electrical signals of each circuit, thereby realizing the function of highly flexible power supply to low-voltage loads, as well as the detection and protection function of the power supply signal processing module 23, improving the efficiency, effectiveness and safety of signal detection, control and analysis of the low-voltage power supply system of new energy vehicles.

[0065] Please refer to Figure 3, which is a schematic diagram of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention. As shown in Figure 3, in an optional implementation, the signal module 12 includes a first detection module 31, which is connected to the power supply module 11 via a signal line. The first detection module 31 is used to detect the electrical parameters of the power supply module 11.

[0066] Furthermore, the first detection module 31 can be integrated into the central control module 13, or integrated into the signal module 12, or set up independently of the central control module 13 and the signal module 12.

[0067] Furthermore, if the first detection module 31 is set up independently of the central control module 13 and the signal module 12, or if the first detection module 31 is integrated into the signal module 12, then the first detection module 31 is connected to the central control module 13 through a signal line.

[0068] The first detection module is used to detect the electrical parameters of the power supply module. When the power supply module includes multiple power supply branches, the first detection module can also be connected to the preset detection points on the corresponding power supply branches through multiple signal lines to obtain the corresponding information.

[0069] The electrical parameters of the power supply module 11 are detected by the first detection module 31. The first detection module 31 can be integrated into the central control module 13, or integrated into the signal module 12, or set up independently of the central control module 13 and the signal module 12. If the first detection module 31 is set up independently of the central control module 13 and the signal module 12, or if the first detection module 31 is integrated into the signal module 12, the first detection module 31 is connected to the central control module 13 through a signal line, realizing signal interaction with the central control module 13. Thus, electrical detection can be performed according to the instructions of the central control module 13, or the electrical parameters of the power supply module 11 can be transmitted. This improves the effectiveness and flexibility of electrical parameter detection on the low-voltage power supply signal processing module 23. The data is stored locally through the central control module 13, which facilitates the analysis of the circuit working status and fault diagnosis, and improves the efficiency, effectiveness and safety of signal detection, control and analysis of the low-voltage power supply system of new energy vehicles.

[0070] As an optional implementation, the signal module 12 further includes a second detection module 32, which is used to detect the operating parameters of the target vehicle during its overall operation.

[0071] In addition, the central control module 13 is also used to determine the working status of the target vehicle and / or each low-voltage electrical appliance 14 based on the working parameters of the target vehicle's overall operation process and the electrical parameters of the power supply module 11.

[0072] The second detection module is used to detect comprehensive operating parameters such as voltage, temperature, and power inside the vehicle. Combined with the data from the first detection module, the data can be sent to the central control module for local analysis or uploaded to the cloud data platform for big data analysis, thereby obtaining relevant information such as the operating status of the vehicle and the operating status of each low-voltage electrical appliance.

[0073] The second detection module 32 acquires comprehensive operating parameters during vehicle operation, which are then combined with the electrical parameters of the low-voltage circuit to determine the operating status of the target vehicle and / or each low-voltage electrical appliance 14. This improves the effectiveness, flexibility, and practicality of electrical parameter detection on the low-voltage power supply signal processing module 23. Furthermore, the central control module 13 enables local data storage, facilitating the analysis of circuit operating status and troubleshooting. This enhances the efficiency, effectiveness, and safety of signal detection, control, and analysis in the low-voltage power supply system of new energy vehicles.

[0074] Please refer to Figure 4, which is a schematic diagram of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention. As shown in Figure 4, as an optional implementation, the signal module 12 further includes a communication module 41, which includes an internal communication module 42 and an external communication module 43.

[0075] The communication module 41 is connected to the central control module 13 via a signal line and is used to communicate and interact with other working areas inside the target vehicle, external devices 48, or external cloud data platforms 49 according to the instruction data of the central control module 13.

[0076] The target vehicle's working domains are divided into functional or task-based categories for each component, including the powertrain domain (safety), chassis domain (vehicle motion), cockpit / intelligent information domain (entertainment), autonomous driving domain (driver assistance), and body domain (body electronics). Other sub-functions can be integrated into these five major working domains or implemented through cross-domain interactions. Therefore, the communication module can be used for data exchange between low-voltage electrical components and related electrical data across the working domains, improving the effectiveness of the operational status analysis process. Simultaneously, it can connect to external devices or cloud platforms, enabling parallel execution of data analysis and acquisition, thus improving data analysis efficiency.

[0077] The communication module 41 enables data interaction between relevant devices inside or outside the vehicle. It can be used to detect and control the electrical parameters of the low-voltage electrical appliances 14, while also analyzing and troubleshooting the corresponding electrical parameters, thereby improving the efficiency and effectiveness of signal detection, control and analysis of the low-voltage power supply system of new energy vehicles.

[0078] As an optional implementation, the internal communication module 42 includes a controller local area network bus transceiver module 44 and a domain controller 45. The internal communication module 42 is used to exchange communication data with other working systems inside the target vehicle.

[0079] The controller LAN bus transceiver module 44 is connected to the central control module 13 via a signal line and to the domain controller 45 via a signal line. The controller LAN bus transceiver module 44 transmits the target data in the central control module 13 to the domain controller 45 via the controller LAN bus signal channel. The domain controller 45 transmits the target data to the corresponding domain controller 45 of other working domains in the target vehicle via the Ethernet connection inside the target vehicle.

[0080] Through the controller local area network bus transceiver module 44 and the domain controller 45, data exchange of electrical parameters of low-voltage electrical appliances 14 in each working domain of the vehicle can be realized, thereby facilitating the analysis and troubleshooting of the working status of low-voltage electrical appliances 14 and the whole vehicle, and improving the efficiency and effectiveness of signal detection, control and analysis of the low-voltage power supply system of new energy vehicles.

[0081] As an optional implementation, the external communication module 43 includes a data acquisition module 46 and / or an antenna module 47. The data acquisition module 46 is used for wired communication data interaction with an external device 48, and the antenna module 47 is used for wireless communication data interaction with an external cloud data platform 49.

[0082] The data acquisition module 46 and the antenna module 47 are connected to the domain controller 45 via signal lines.

[0083] The data acquisition module 46 and / or antenna module 47 enable data interaction with external devices 48 or cloud data platform 49 outside the vehicle, thereby facilitating the analysis and troubleshooting of low-voltage electrical appliances 14 and the overall vehicle operating status, and improving the efficiency and effectiveness of signal detection, control and analysis of the low-voltage power supply system of new energy vehicles.

[0084] Please refer to Figure 5, which is a schematic diagram of another automotive low-voltage system signal measurement and control circuit disclosed in an embodiment of the present invention. As shown in Figure 5, in a practical implementation, the aforementioned embodiments can be combined. In the figure, lines with arrows represent electrical circuits, and lines without arrows represent signal circuits. The first detection module for the electrical parameters of each power supply signal processing module is built into the central control module. The second detection module is specifically implemented through the voltage and temperature detection module and the signal processing module of the hard-wired signal section. The CAN transceiver module, domain controller, diagnostic interface, and cloud data platform constitute the communication module. The DC-DC output, each power supply signal processing module, and low-voltage electrical appliances constitute the power supply module. External devices that may be connected to the diagnostic interface and the external high-voltage power supply connected to the DC-DC are not shown here.

[0085] The overall circuit mainly includes a central control module, a CAN transceiver module, a signal processing module, a voltage detection module, a temperature detection module, a current conversion circuit, a diagnostic interface, a domain controller, an antenna module, and a TSP transmission. The system also includes various low-voltage electrical appliances, a cloud data platform, and external devices that may be connected to the diagnostic interface.

[0086] The high voltage of the vehicle is converted to low voltage by the DC-DC module, and then the low voltage electrical appliances are powered through the power signal processing module that combines power chips and MOSFETs. The central control module monitors and stores the voltage, current and other status information of each power signal processing module. The status information of the power signal processing module is transmitted to the domain controller through the CAN channel via the CAN transceiver module, and then transmitted to other domain controllers via Ethernet by the domain controller. The voltage, current and other status information of each power signal processing module can be read by the data acquisition device through the vehicle diagnostic interface, or it can be uploaded to the cloud data platform for storage via the vehicle antenna through the TSP, and displayed in the user application or energy management background. The central control module can monitor the system voltage and temperature through the voltage monitoring module and the temperature monitoring module. Hard-wired signals can be converted by the signal processing module and then transmitted to the central control module for processing, realizing the hard-wired activation / disconnection of some controllers.

[0087] This application provides an automotive low-voltage system signal measurement and control system, the system including an automotive low-voltage system signal measurement and control circuit as described in any embodiment, low-voltage electrical appliances, and a remote device equipped with a cloud data platform.

[0088] This application provides a new energy vehicle, which includes a low-voltage system signal measurement and control circuit as described in any embodiment.

[0089] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0090] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A signal measurement and control circuit for an automotive low-voltage system, characterized in that, The circuit is applied to a target vehicle that uses electricity as its power source, and the circuit includes: Power supply module, signal module, and central control module; The power supply module is used to process the high-voltage power supply voltage, generate a target power supply voltage that meets preset conditions, and supply power to each low-voltage electrical appliance according to the target power supply voltage. The central control module is used to interact with the signal module, process or store the detection data in the signal module, and drive the signal module to perform signal acquisition, signal processing or signal transmission functions through instruction data. Furthermore, the central control module is connected to the power supply module and the signal module via signal lines, and the power supply module is connected to the high-voltage power supply voltage via electrical lines, and is also connected to each of the low-voltage electrical appliances via electrical lines.

2. The circuit according to claim 1, characterized in that, The power supply module includes a DC-DC converter output module and multiple power supply branches, each power supply branch including a power supply signal processing module and at least one low-voltage electrical appliance. The first end of each power supply signal processing module is interconnected with each other via electrical lines and signal lines, and is connected to the output end of the DC-DC converter output module. The first end of each power supply signal processing module is connected to the central control module via a signal line. The second end of each power supply signal processing module is connected to the low-voltage electrical appliance of the corresponding power supply branch via an electrical line. The input end of the DC-DC converter output module is connected to the high-voltage power supply voltage via an electrical line. The signal end of the DC-DC converter output module is connected to the signal module via a signal line.

3. The circuit according to claim 2, characterized in that, The power supply signal processing module includes a power chip module and a transistor module; The power chip module is connected to the DC-DC converter output module, the driving terminal of the transistor module is connected to the power chip module, the first terminal of the transistor module is connected to the low-voltage electrical appliance on the corresponding power supply branch, and the second terminal of the transistor module is grounded.

4. The circuit according to claim 1, characterized in that, The signal module includes a first detection module, which is connected to the power supply module via a signal line. The first detection module is used to detect the electrical parameters of the power supply module. Furthermore, the first detection module may be integrated into the central control module, or integrated into the signal module, or set up independently of the central control module and the signal module; Furthermore, if the first detection module is set up independently of the central control module and the signal module, or if the first detection module is integrated into the signal module, then the first detection module is connected to the central control module via a signal line.

5. The circuit according to claim 4, characterized in that, The signal module further includes a second detection module, which is used to detect the operating parameters of the target vehicle during its overall operation. Furthermore, the central control module is also used to determine the operating status of the target vehicle and / or each of the low-voltage electrical appliances based on the operating parameters of the target vehicle during its overall operation and the electrical parameters of the power supply module.

6. The circuit according to any one of claims 1-5, characterized in that, The signal module further includes a communication module, which includes an internal communication module and an external communication module. The communication module is connected to the central control module via a signal line and is used to communicate and interact with other working areas inside the target vehicle, external devices, or external cloud data platforms according to the instruction data of the central control module.

7. The circuit according to claim 6, characterized in that, The internal communication module includes a controller local area network bus transceiver module and a domain controller. The internal communication module is used to communicate and exchange data with other working systems inside the target vehicle. The controller LAN bus transceiver module is connected to the central control module via a signal line and to the domain controller via a signal line. The controller LAN bus transceiver module transmits the target data in the central control module to the domain controller via the controller LAN bus signal channel. The domain controller transmits the target data to the domain controllers corresponding to other working domains in the target vehicle via the Ethernet connection inside the target vehicle.

8. The circuit according to claim 7, characterized in that, The external communication module includes a data acquisition module and / or an antenna module. The data acquisition module is used for wired communication data interaction with external devices, and the antenna module is used for wireless communication data interaction with an external cloud data platform. The data acquisition module and the antenna module are connected to the domain controller via signal lines.

9. A signal measurement and control system for an automotive low-voltage system, characterized in that, The system includes a low-voltage automotive system signal measurement and control circuit as described in any one of claims 1-8, low-voltage electrical appliances, and a remote device equipped with the cloud data platform.

10. A new energy vehicle, characterized in that, The new energy vehicle includes the automotive low-voltage system signal measurement and control circuit as described in any one of claims 1-8.

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