Data acquisition system and vehicle

Abstract

This disclosure relates to the field of vehicle data acquisition technology, providing a data acquisition system and a vehicle. The data acquisition system includes: a first controller, a power line carrier communication module, and at least one acquisition module; the first controller is coupled to at least one acquisition module via the power line carrier communication module; the first controller and at least one acquisition module perform bidirectional signal transmission via the power line carrier communication module. By using the power line carrier communication module to replace traditional physical wiring harnesses to achieve bidirectional information interaction between the first controller and at least one acquisition module, the connection method is simplified, eliminating the need for laying a large number of physical wiring harnesses, saving wiring space, and enhancing scalability.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle data acquisition technology, specifically to a data acquisition system and a vehicle. Background Technology

[0002] The data acquisition module collects key information about the vehicle's operation, such as speed, RPM, and position, and then transmits the collected data to the controller. In applications related to the vehicle's power battery system, the acquisition module can collect key information about the power battery, such as voltage, temperature, and safety monitoring data. The controller can analyze and process the collected data to achieve precise control of the vehicle.

[0003] In related technologies, the controller and various acquisition modules are connected through physical wiring harnesses to achieve information exchange. However, physical wiring harnesses are complex, take up space, and are not easy to expand. Summary of the Invention

[0004] The purpose of this disclosure is to provide a data acquisition system and vehicle to solve the technical problems in the related art.

[0005] This disclosure provides a data acquisition system, including: a first controller, a power line carrier communication module, and at least one acquisition module; The first controller is coupled to the at least one acquisition module via the power line carrier communication module; The first controller and the at least one acquisition module transmit signals bidirectionally through the power line carrier communication module.

[0006] Optionally, the power line carrier communication module includes: a first power line carrier communication circuit, a power transmission conductor, and at least one second power line carrier communication circuit; The first power line carrier communication circuit is coupled to the first controller, and the first power line carrier communication circuit is coupled to the at least one second power line carrier communication circuit through the power transmission conductor. The at least one second power line carrier communication circuit is coupled to the at least one acquisition module, and the at least one second power line carrier communication circuit corresponds one-to-one with the at least one acquisition module. The first power line carrier communication circuit is used to modulate the control signal sent by the first controller and couple it to the power transmission conductor, so as to demodulate it through the second power line carrier communication circuit and send it to the acquisition module; The second power line carrier communication circuit is used to modulate the data collected by the acquisition module and couple it to the power transmission conductor, so that it can be demodulated by the first power line carrier communication circuit and sent to the first controller.

[0007] Optionally, the first power line carrier communication circuit is further configured to demodulate the first carrier signal and transmit it to the first controller when the first identification information matches the identification information of the first controller, wherein the first identification information represents the identification information of the receiver corresponding to the first carrier signal, and the first carrier signal represents the signal of the data collected by the acquisition module being transmitted sequentially through the second power line carrier communication circuit and the power transmission conductor to the first power line carrier communication circuit.

[0008] Optionally, the second power line carrier communication circuit is further configured to demodulate the second carrier signal and transmit it to the acquisition module when the second identification information matches the identification information of the acquisition module corresponding to the second power line carrier communication circuit. The second identification information represents the identification information of the receiver corresponding to the second carrier signal, and the second carrier signal represents the signal of the control signal issued by the first controller that is transmitted sequentially through the first power line carrier communication circuit and the power transmission conductor to the second power line carrier communication circuit.

[0009] Optionally, the first power line carrier communication circuit includes: a first power line carrier chip, a first bandpass filter, and a first coupling protection circuit; The first controller is sequentially coupled to the power transmission conductor via the first power line carrier chip, the first bandpass filter, and the first coupling protection circuit. The first controller is further configured to modulate, filter, and couple the control signal sequentially through the first power line carrier chip, the first bandpass filter, and the first coupling protection circuit, and then couple it to the power transmission conductor to transmit it to the second power line carrier communication circuit. The first coupling protection circuit, the first bandpass filter, and the first power line carrier chip are also used in sequence to perform coupling protection, filtering, and demodulation on the first carrier signal, and then send it to the first controller. The first carrier signal represents the signal of the data collected by the acquisition module being transmitted to the first power line carrier communication circuit via the second power line carrier communication circuit and the power transmission conductor.

[0010] Optionally, the second power line carrier communication circuit includes: a second power line carrier chip, a second bandpass filter, and a second coupling protection circuit; The acquisition module is sequentially coupled to the power transmission conductor via the second power line carrier chip, the second bandpass filter, and the second coupling protection circuit. The acquisition module is also used to sequentially modulate, filter, and couple the acquired data through the second power line carrier chip, the second bandpass filter, and the second coupling protection circuit, and then couple it to the power transmission conductor to transmit it to the first power line carrier communication circuit. The second coupling protection circuit, the second bandpass filter, and the second power line carrier chip are also used in sequence to perform coupling protection, filtering, and demodulation on the second carrier signal, and then send it to the acquisition module. The second carrier signal represents the control signal issued by the first controller, which is transmitted to the second power line carrier communication circuit in sequence through the first power line carrier communication circuit and the power transmission conductor.

[0011] Optionally, the power transmission conductor includes a power copper busbar.

[0012] Optionally, the acquisition module includes: a second controller, an acquisition chip, a voltage sensor, and a temperature sensor; The second controller is coupled to the power line carrier communication module, and the second controller is coupled to the voltage sensor and the temperature sensor respectively through the acquisition chip; The voltage sensor is used to detect the voltage value of the battery cell and send the voltage value to the acquisition chip; The temperature sensor is used to detect the temperature value of the battery cell and send the temperature value to the acquisition chip; The acquisition chip is used to send the voltage value and the temperature value to the second controller.

[0013] Optionally, the acquisition module further includes a safety monitoring circuit; The safety monitoring circuit is coupled to the second controller; The safety monitoring circuit is used to perform safety monitoring on the power battery pack, obtain safety monitoring data, and send the safety monitoring data to the second controller.

[0014] This disclosure also provides a vehicle, including: The aforementioned data acquisition system.

[0015] The above technical solution uses a power line carrier communication module to replace the traditional physical wiring harness to realize bidirectional information interaction between the first controller and at least one acquisition module, which simplifies the connection method, eliminates the need to lay a large number of physical wiring harnesses, saves wiring space, and enhances scalability.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a block diagram illustrating a data acquisition system according to an exemplary embodiment.

[0018] Figure 2 This is a schematic diagram of a data acquisition system according to an exemplary embodiment.

[0019] Figure 3 This is a schematic diagram of another data acquisition system according to an exemplary embodiment.

[0020] Figure 4 This is a schematic diagram illustrating a signal modulation according to an exemplary embodiment.

[0021] Figure 5 This is a schematic diagram illustrating a signal coupling according to an exemplary embodiment.

[0022] Figure 6 This is a schematic diagram illustrating signal demodulation according to an exemplary embodiment.

[0023] Figure 7 This is a schematic diagram of another data acquisition system according to an exemplary embodiment.

[0024] Figure 8 This is a signal processing flowchart of a first power line carrier communication circuit according to an exemplary embodiment.

[0025] Figure 9 This is a block diagram illustrating a first power line carrier communication circuit according to an exemplary embodiment.

[0026] Figure 10 This is a block diagram illustrating a second power line carrier communication circuit according to an exemplary embodiment.

[0027] Figure 11 This is a block diagram illustrating a data acquisition module according to an exemplary embodiment.

[0028] Explanation of reference numerals in the attached figures 10-First controller, 20-Power line carrier communication module, 21-First power line carrier communication circuit, 211-First power line carrier chip, 212-First bandpass filter, 213-First coupling protection circuit, 22-Power transmission conductor, 23-Second power line carrier communication circuit, 231-Second power line carrier chip, 232-Second bandpass filter, 233-Second coupling protection circuit, 30-Acquisition module, 31-Second controller, 32-Acquisition chip, 33-Voltage sensor, 34-Temperature sensor, 35-Safety monitoring circuit. Detailed Implementation

[0029] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0030] In the following description, the words "first" and "second" are used only to distinguish the purpose of the description and should not be interpreted as indicating or implying relative importance or order.

[0031] The data acquisition module collects key information about the vehicle's operation, such as speed, RPM, and position, and then transmits the collected data to the controller. In applications related to the vehicle's power battery system, the acquisition module can collect key information about the power battery, such as voltage, temperature, and safety monitoring data. The controller can analyze and process the collected data to achieve precise control of the vehicle.

[0032] Most existing power battery systems rely on physical wiring harnesses (such as CAN communication) for connection, which leads to reduced energy density (wiring harnesses account for more than 7% of the vehicle weight), complex wiring harness layout (difficult to wire for communication between multiple battery packs), limited scalability (unable to flexibly adapt to different project platforms), and risks of cable aging, poor contact of connectors or short circuits, resulting in low communication reliability.

[0033] In other words, the controller and each acquisition module are connected by physical wiring harnesses to achieve information exchange. The physical wiring harnesses are complex, take up space, and are not easy to expand.

[0034] To address the aforementioned issues, a power line carrier communication module is used to replace the traditional physical wiring harness to achieve bidirectional information exchange between the first controller and at least one acquisition module. This simplifies the connection method, eliminates the need for laying a large number of physical wiring harnesses, saves wiring space, and enhances scalability.

[0035] Figure 1 This is a block diagram illustrating a data acquisition system according to an exemplary embodiment. This data acquisition system can be applied to a vehicle or a vehicle's power battery system. Please refer to [link / reference]. Figure 1The data acquisition system may include a first controller 10, a power line carrier communication module 20, and at least one acquisition module 30.

[0036] The first controller 10 is coupled to at least one acquisition module 30 via a power line carrier communication module 20; The first controller 10 and at least one acquisition module 30 transmit signals bidirectionally through the power line carrier communication module 20.

[0037] Coupling can include direct or indirect connections.

[0038] The first controller 10 sends control signals (e.g., acquisition wake-up command, equalization command) to at least one acquisition module 30 via the power line carrier communication module 20, and the acquisition module 30 sends the acquired data (e.g., sensor data) to the first controller 10 via the power line carrier communication module 20.

[0039] Please see Figure 2 The communication principle of the data acquisition system is as follows: First, the acquisition module 30 or the first controller 10, acting as the data sender, sends data. The transmitted data is modulated from a digital signal into a high-frequency carrier signal using modulation technology, and then transmitted through a coupling transmission method. The received data is demodulated from the high-frequency carrier signal into a digital signal using demodulation technology to restore the initial transmitted data. Then, the corresponding first controller 10 or acquisition module 30, acting as the receiver, receives the data.

[0040] Modulation techniques can be, but are not limited to, frequency-shift keying (FSK), phase-shift keying (PSK), etc.

[0041] When the data acquisition system is applied to the vehicle's power battery system, the first controller 10 can be the main control module of the Battery Management System (BMS).

[0042] The power line carrier communication module 20 replaces the traditional physical wiring harness to realize bidirectional information interaction between the first controller 10 and at least one acquisition module 30, which simplifies the connection method, eliminates the need to lay a large number of physical wiring harnesses, saves wiring space, and enhances scalability.

[0043] In one possible implementation, please refer to Figure 2 The power line carrier communication module 20 may include a first power line carrier communication circuit 21, a power transmission conductor 22, and at least one second power line carrier communication circuit 23.

[0044] The first power line carrier communication circuit 21 is coupled to the first controller 10, and the first power line carrier communication circuit 21 is coupled to at least one second power line carrier communication circuit 23 through the power transmission conductor 22. The at least one second power line carrier communication circuit 23 is coupled to at least one acquisition module 30, and the at least one second power line carrier communication circuit 23 corresponds one-to-one with the at least one acquisition module 30.

[0045] The first power line carrier communication circuit 21 is coupled to the first controller 10. The first power line carrier communication circuit 21 can be directly connected to the first controller 10, or the first power line carrier communication circuit 21 can be indirectly connected to the first controller 10 through other devices.

[0046] The first power line carrier communication circuit 21 is coupled to at least one second power line carrier communication circuit 23 through a power transmission conductor 22. The first power line carrier communication circuit 21 can be directly connected to at least one second power line carrier communication circuit 23 through the power transmission conductor 22, or the first power line carrier communication circuit 21 can be indirectly connected to at least one second power line carrier communication circuit 23 through other devices and then through the power transmission conductor 22.

[0047] The number of second power line carrier communication circuits 23 is the same as that of acquisition modules 30, with one second power line carrier communication circuit 23 corresponding to one acquisition module 30. One second power line carrier communication circuit 23 is coupled to one acquisition module 30. It can be that one second power line carrier communication circuit 23 is directly connected to one acquisition module 30, or it can be indirectly connected to one acquisition module 30 through other devices.

[0048] For example, there are N second power line carrier communication circuits 23, namely second power line carrier communication circuit 1, second power line carrier communication circuit 2... second power line carrier communication circuit N, and there are also N acquisition modules 30, namely acquisition module 1, acquisition module 2... acquisition module N, second power line carrier communication circuit 1 is coupled to acquisition module 1, second power line carrier communication circuit 2 is coupled to acquisition module 2..., and second power line carrier communication circuit N is coupled to acquisition module N.

[0049] Please see Figure 3 The first power line carrier communication circuit 21 is used to modulate the control signal sent by the first controller 10 and couple it to the power transmission conductor 22, so that it can be demodulated by the second power line carrier communication circuit 23 and sent to the acquisition module 30.

[0050] The control signals can be, but are not limited to, the acquisition wake-up command and equalization command of the acquisition module 30.

[0051] Please see Figures 4-6The first controller 10 sends a control signal in digital form. Then, through the first power line carrier communication circuit 21, the control signal is modulated from a low-frequency digital signal onto a high-frequency carrier signal, becoming a high-frequency carrier signal. This high-frequency carrier signal is coupled to the power transmission conductor 22 for transmission to the second power line carrier communication circuit 23. The second power line carrier communication circuit 23 demodulates the high-frequency carrier signal, restoring it to a digital control signal, and sends it to the acquisition module 30. The high-frequency carrier signal can be coupled to the power transmission conductor 22 using a capacitor or inductive coupler.

[0052] The second power line carrier communication circuit 23 is used to modulate the data collected by the acquisition module 30 and couple it to the power transmission conductor 22, so that it can be demodulated by the first power line carrier communication circuit 21 and sent to the first controller 10.

[0053] Please see Figure 7 The acquisition module 30 acquires the data in the form of a digital signal, and then the second power line carrier communication circuit 23 loads the acquired data from a low-frequency digital signal onto a high-frequency carrier signal, modulates it into a high-frequency carrier signal, couples the high-frequency carrier signal to the power transmission conductor 22 for transmission, and transmits it to the first power line carrier communication circuit 21. The first power line carrier communication circuit 21 demodulates the high-frequency carrier signal, restores the acquired data in the form of a digital signal, and sends it to the first controller 10.

[0054] In one possible implementation, the first power line carrier communication circuit 21 is further configured to demodulate the first carrier signal and transmit it to the first controller 10 if the first identification information matches the identification information of the first controller 10.

[0055] The first identification information represents the identification information of the receiver corresponding to the first carrier signal, and the first carrier signal represents the signal that the data collected by the acquisition module 30 is transmitted sequentially to the first power carrier communication circuit 21 via the second power carrier communication circuit 23 and the power transmission conductor 22.

[0056] The data collected by the acquisition module 30 is transmitted sequentially through the second power line carrier communication circuit 23 and the power transmission conductor 22 to the high-frequency carrier signal at the first power line carrier communication circuit 21, which is the first carrier signal.

[0057] The first power line carrier communication circuit 21 compares the first identification information with the identification information of the first controller 10. If the first identification information matches the identification information of the first controller 10, that is, if the first identification information is the same as the identification information of the first controller 10, it determines that the first carrier information is to be sent to the first controller 10, and then demodulates the first carrier signal and transmits it to the first controller 10.

[0058] The signal will only be demodulated and sent to the first controller 10 when the identification information of the first carrier signal matches the identification information of the first controller 10, which can ensure the correctness and security of data transmission.

[0059] In another possible implementation, to prevent the first power line carrier communication circuit 21 from simultaneously transmitting and receiving data, data priority settings can be used to avoid this. By setting the communication module status word and interrupt priority, it can be ensured that the module is only in receiving or transmitting state at any given time, thus preventing transmission and reception conflicts.

[0060] Please see Figure 8 The first power line carrier communication circuit 21 is constantly in signal receiving mode, continuously detecting carrier signals (such as control signals issued by the first controller 10 or data collected by the acquisition module 30) on the power transmission conductor 22. If a carrier signal is detected, it first checks whether the target address in the data packet matches its assigned address. If the address is correct, it triggers a carrier signal reception interrupt program, stops receiving the next data packet, and after completing signal demodulation, sends the demodulated signal to the receiver via the serial port. If the address is incorrect, it is considered invalid data, skips processing, and enters the serial port signal detection process. The serial port signal detection process includes first detecting whether there is a serial port signal. If a serial port signal is detected, it triggers a serial port signal reception interrupt program, stops receiving the next data packet, and after completing signal modulation, sends the modulated signal to the receiver via the carrier. The serial port signal is the signal before modulation. If there is no signal from either the power busbar or the serial port, the carrier data detection can be restarted to form a loop.

[0061] In one possible implementation, the second power line carrier communication circuit 23 is further configured to demodulate the second carrier signal and transmit it to the acquisition module 30 when the second identification information matches the identification information of the acquisition module 30 corresponding to the second power line carrier communication circuit 23.

[0062] The second identification information represents the identification information of the receiver corresponding to the second carrier signal, and the second carrier signal represents the signal of the control signal issued by the first controller 10 transmitted sequentially through the first power carrier communication circuit 21 and the power transmission conductor 22 to the second power carrier communication circuit 23.

[0063] The control signal issued by the first controller 10 is transmitted sequentially through the first power line carrier communication circuit 21 and the power transmission conductor 22 to the high-frequency carrier signal at the second power line carrier communication circuit 23, which is the second carrier signal.

[0064] The second power line carrier communication circuit 23 compares the second identification information with the identification information of the acquisition module 30 corresponding to the second power line carrier communication circuit 23. If the second identification information matches the identification information of the acquisition module 30 corresponding to the second power line carrier communication circuit 23, that is, if the second identification information is the same as the identification information of the acquisition module 30 corresponding to the second power line carrier communication circuit 23, it is determined that the second carrier information is to be sent to the acquisition module 30 corresponding to the second power line carrier communication circuit 23, and only then will the second carrier signal be demodulated and transmitted to the corresponding acquisition module 30.

[0065] The signal will only be demodulated and sent to the acquisition module 30 corresponding to the second power line carrier communication circuit 23 when the identification information of the second carrier signal matches the identification information of the acquisition module 30 corresponding to the second power line carrier communication circuit 23. This ensures the correctness and security of data transmission.

[0066] In another possible implementation, in order to prevent the second power line carrier communication circuit 23 from sending and receiving data simultaneously, the second power line carrier communication circuit 23 can be configured in the same way as the first power line carrier communication circuit 21, which will not be described in detail here.

[0067] In one possible implementation, please refer to Figure 9 The first power line carrier communication circuit 21 may include a first power line carrier chip 211, a first bandpass filter 212, and a first coupling protection circuit 213.

[0068] The first controller 10 is sequentially coupled to the power transmission conductor 22 via the first power line carrier chip 211, the first bandpass filter 212, and the first coupling protection circuit 213.

[0069] The first bandpass filter may include a receiving bandpass filter and a transmitting bandpass filter. The input of the receiving bandpass filter is connected to the first coupling protection circuit 213, and the output of the receiving bandpass filter is connected to the first power line carrier chip 211; the input of the transmitting bandpass filter is connected to the first power line carrier chip 211, and the output of the transmitting bandpass filter is connected to the first coupling protection circuit 213.

[0070] Transmitting bandpass filters can be used to filter out unwanted signals other than those specified, preventing invalid signals from being loaded onto the power busbar through the coupling circuit. Receiving bandpass filters can be used to filter out noise and interference signals other than the target frequency, ensuring the accuracy of received data and its anti-interference capability.

[0071] The first controller 10 is also used to modulate, filter and couple the control signal sequentially through the first power line carrier chip 211, the first bandpass filter 212 and the first coupling protection circuit 213, and then couple it to the power transmission conductor 22 to transmit it to the second power line carrier communication circuit 23.

[0072] The first power line carrier chip 211 modulates the control signal sent by the first controller 10 to obtain a first modulated signal. The transmit bandpass filter in the first bandpass filter 212 filters the first modulated signal to obtain a filtered first modulated signal. The first coupling protection circuit 213 protects the filtered first modulated signal from coupling and couples the protected signal to the power transmission conductor 22 for transmission to the second power line carrier communication circuit 23.

[0073] The first coupling protection circuit 213, the first bandpass filter 212, and the first power line carrier chip 211 are also used to perform coupling protection, filtering, and demodulation on the first carrier signal, respectively, before sending it to the first controller 10.

[0074] The data collected by the first carrier signal characterization acquisition module 30 is transmitted sequentially through the second power carrier communication circuit 23 and the power transmission conductor 22 to the signal at the first power carrier communication circuit 21.

[0075] The first coupling protection circuit 213 is also used to couple and protect the first carrier signal transmitted by the power transmission conductor 22 and transmit it to the receiving bandpass filter in the first bandpass filter 212; the receiving bandpass filter in the first bandpass filter 212 is also used to filter the first carrier signal after coupling protection to obtain the filtered first carrier signal; the first power carrier chip 211 is also used to demodulate the filtered first carrier signal and transmit it to the first controller 10.

[0076] The first power line carrier chip 211 can integrate modulation, demodulation, filtering, and amplifier functions to realize signal transmission and signal reception.

[0077] The first coupling protection circuit 213 can be used to protect the interface circuit devices from being burned out, and to achieve a safe connection between the power line and the communication circuit through electromagnetic isolation.

[0078] In one possible implementation, please refer to Figure 10 The second power line carrier communication circuit 23 may include a second power line carrier chip 231, a second bandpass filter 232, and a second coupling protection circuit 233.

[0079] The acquisition module 30 is coupled to the power transmission conductor 22 in sequence through the second power line carrier chip 231, the second bandpass filter 232, and the second coupling protection circuit 233.

[0080] The second bandpass filter 232 may include a receiving bandpass filter and a transmitting bandpass filter. The input terminal of the receiving bandpass filter is connected to the second coupling protection circuit 233, and the output terminal of the receiving bandpass filter is connected to the second power line carrier chip 231; the input terminal of the transmitting bandpass filter is connected to the second power line carrier chip 231, and the output terminal of the transmitting bandpass filter is connected to the second coupling protection circuit 233.

[0081] Transmitting bandpass filters can be used to filter out unwanted signals other than those specified, preventing invalid signals from being loaded onto the power busbar through the coupling circuit. Receiving bandpass filters can be used to filter out noise and interference signals other than the target frequency, ensuring the accuracy of received data and its anti-interference capability.

[0082] The acquisition module 30 is also used to modulate, filter and couple the acquired data sequentially through the second power line carrier chip 231, the second bandpass filter 232 and the second coupling protection circuit 233, and then couple it to the power transmission conductor 22 to transmit it to the first power line carrier communication circuit 21.

[0083] The second power line carrier chip 231 is used to modulate the acquired data collected by the acquisition module 30 to obtain a second modulated signal. The transmit bandpass filter in the second bandpass filter 232 is used to filter the second modulated signal to obtain a filtered second modulated signal; the second coupling protection circuit 233 is used to perform coupling protection on the filtered second modulated signal and couple the coupled protected signal to the power transmission conductor 22 for transmission to the first power line carrier communication circuit 21.

[0084] The second coupling protection circuit 233, the second bandpass filter 232, and the second power line carrier chip 231 are also used to perform coupling protection, filtering, and demodulation on the second carrier signal, respectively, before sending it to the acquisition module 30.

[0085] The second carrier signal represents the control signal issued by the first controller 10, which is transmitted sequentially through the first power carrier communication circuit 21 and the power transmission conductor 22 to the second power carrier communication circuit 23.

[0086] The second coupling protection circuit 233 is also used to couple and protect the second carrier signal transmitted by the power transmission conductor 22 and transmit it to the receiving bandpass filter in the second bandpass filter 232; the receiving bandpass filter in the second bandpass filter 232 is also used to filter the second carrier signal after coupling protection to obtain the filtered second carrier signal; the second power carrier chip 231 is also used to demodulate the filtered second carrier signal and transmit it to the corresponding acquisition module 30.

[0087] The second power line carrier chip 231 can integrate modulation, demodulation, filtering, and amplifier functions to realize signal transmission and signal reception.

[0088] The second coupling protection circuit 233 can be used to protect interface circuit devices from being burned out, and achieve a safe connection between the power line and the communication circuit through electromagnetic isolation.

[0089] It should be understood that the signal processing flow of the second power line carrier communication circuit 22 can refer to that of the second power line carrier communication circuit 21, and will not be described again in this embodiment.

[0090] In one possible implementation, when the data acquisition system is applied to the vehicle's power battery system, the first controller 10 may be the BMS main control module, and the power transmission conductor 22 may include a power copper busbar.

[0091] By reusing the power transmission conductor 22 with a power copper busbar, wiring space and harness costs can be saved.

[0092] In one possible implementation, please refer to Figure 11 The acquisition module 30 may include a second controller 31, an acquisition chip 32, a voltage sensor 33, and a temperature sensor 34.

[0093] The second controller 31 is coupled to the power line carrier communication module 20, and the second controller 31 is coupled to the voltage sensor 33 and the temperature sensor 34 respectively through the acquisition chip 32.

[0094] Voltage sensor 33 is used to detect the voltage value of the battery cell and send the voltage value to acquisition chip 32.

[0095] Temperature sensor 34 is used to detect the temperature value of the battery cell and send the temperature value to the acquisition chip 32.

[0096] The acquisition chip 32 is used to send the voltage and temperature values ​​to the second controller 31.

[0097] In other embodiments, the acquisition module 30 may further include an equalization circuit coupled to the acquisition chip 32.

[0098] In another possible implementation, the acquisition module 30 also includes a safety monitoring circuit 35.

[0099] The safety monitoring circuit 35 is coupled to the second controller 31.

[0100] The safety monitoring circuit 35 can be directly connected to the second controller 31, or it can be indirectly connected to the second controller 31 through other devices.

[0101] The safety monitoring circuit 35 is used to monitor the safety of the power battery pack, obtain safety monitoring data, and send the safety monitoring data to the second controller 31.

[0102] The safety monitoring circuit 35 may be, but is not limited to, an acceleration sensor, a thermal runaway monitoring device with a pressure sensor, a hydrogen (H2) sensor, a smoke sensor, or a leak detection device with a leak sensor.

[0103] The acquisition chip 32 of the acquisition module 30 and the safety monitoring circuit 35 can exchange data via a communication serial port (I2C or SPI) and the second controller 31. The power line carrier communication module 20 can also exchange data with the first controller 10 and the acquisition module 30 via a communication serial port (I2C or SPI).

[0104] The data acquisition system disclosed herein uses a power busbar as a communication carrier to achieve data interaction between the acquisition module and the BMS main control module. This data acquisition system employs power line carrier technology to directly load signals onto the positive and negative power busbars of the battery, eliminating the need for independent physical communication harnesses, saving harness and installation costs, reducing system wiring complexity, and supporting flexible configuration of multiple batteries. This improves the flexibility of expanding the number of battery cells in series and eliminates compatibility limitations caused by differences in project platforms.

[0105] This disclosure also provides a vehicle including the aforementioned data acquisition system.

[0106] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0107] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0108] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A data acquisition system, characterized in that, It includes a first controller, a power line carrier communication module, and at least one acquisition module; The first controller is coupled to the at least one acquisition module via the power line carrier communication module; The first controller and the at least one acquisition module transmit signals bidirectionally through the power line carrier communication module.

2. The data acquisition system according to claim 1, characterized in that, The power line carrier communication module includes: a first power line carrier communication circuit, a power transmission conductor, and at least one second power line carrier communication circuit; The first power line carrier communication circuit is coupled to the first controller, and the first power line carrier communication circuit is coupled to the at least one second power line carrier communication circuit through the power transmission conductor. The at least one second power line carrier communication circuit is coupled to the at least one acquisition module, and the at least one second power line carrier communication circuit corresponds one-to-one with the at least one acquisition module. The first power line carrier communication circuit is used to modulate the control signal sent by the first controller and couple it to the power transmission conductor, so as to demodulate it through the second power line carrier communication circuit and send it to the acquisition module; The second power line carrier communication circuit is used to modulate the data collected by the acquisition module and couple it to the power transmission conductor, so that it can be demodulated by the first power line carrier communication circuit and sent to the first controller.

3. The data acquisition system according to claim 2, characterized in that, The first power line carrier communication circuit is further configured to demodulate the first carrier signal and transmit it to the first controller when the first identification information matches the identification information of the first controller. The first identification information represents the identification information of the receiver corresponding to the first carrier signal, and the first carrier signal represents the signal of the data collected by the acquisition module being transmitted sequentially through the second power line carrier communication circuit and the power transmission conductor to the first power line carrier communication circuit.

4. The data acquisition system according to claim 2, characterized in that, The second power line carrier communication circuit is further configured to demodulate the second carrier signal and transmit it to the acquisition module when the second identification information matches the identification information of the acquisition module corresponding to the second power line carrier communication circuit. The second identification information represents the identification information of the receiver corresponding to the second carrier signal, and the second carrier signal represents the signal of the control signal issued by the first controller that is transmitted sequentially through the first power line carrier communication circuit and the power transmission conductor to the second power line carrier communication circuit.

5. The data acquisition system according to claim 2, characterized in that, The first power line carrier communication circuit includes: a first power line carrier chip, a first bandpass filter, and a first coupling protection circuit; The first controller is sequentially coupled to the power transmission conductor via the first power line carrier chip, the first bandpass filter, and the first coupling protection circuit. The first controller is further configured to modulate, filter, and couple the control signal sequentially through the first power line carrier chip, the first bandpass filter, and the first coupling protection circuit, and then couple it to the power transmission conductor to transmit it to the second power line carrier communication circuit. The first coupling protection circuit, the first bandpass filter, and the first power line carrier chip are also used in sequence to perform coupling protection, filtering, and demodulation on the first carrier signal, and then send it to the first controller. The first carrier signal represents the signal of the data collected by the acquisition module being transmitted to the first power line carrier communication circuit via the second power line carrier communication circuit and the power transmission conductor.

6. The data acquisition system according to claim 2, characterized in that, The second power line carrier communication circuit includes: a second power line carrier chip, a second bandpass filter, and a second coupling protection circuit; The acquisition module is sequentially coupled to the power transmission conductor via the second power line carrier chip, the second bandpass filter, and the second coupling protection circuit. The acquisition module is also used to sequentially modulate, filter, and couple the acquired data through the second power line carrier chip, the second bandpass filter, and the second coupling protection circuit, and then couple it to the power transmission conductor to transmit it to the first power line carrier communication circuit. The second coupling protection circuit, the second bandpass filter, and the second power line carrier chip are also used in sequence to perform coupling protection, filtering, and demodulation on the second carrier signal, and then send it to the acquisition module. The second carrier signal represents the control signal issued by the first controller, which is transmitted to the second power line carrier communication circuit in sequence through the first power line carrier communication circuit and the power transmission conductor.

7. The data acquisition system according to any one of claims 2-6, characterized in that, The power transmission conductor includes a power copper busbar.

8. The data acquisition system according to any one of claims 1-6, characterized in that, The acquisition module includes: a second controller, an acquisition chip, a voltage sensor, and a temperature sensor; The second controller is coupled to the power line carrier communication module, and the second controller is coupled to the voltage sensor and the temperature sensor respectively through the acquisition chip; The voltage sensor is used to detect the voltage value of the battery cell and send the voltage value to the acquisition chip; The temperature sensor is used to detect the temperature value of the battery cell and send the temperature value to the acquisition chip; The acquisition chip is used to send the voltage value and the temperature value to the second controller.

9. The data acquisition system according to claim 8, characterized in that, The acquisition module also includes a safety monitoring circuit; The safety monitoring circuit is coupled to the second controller; The safety monitoring circuit is used to perform safety monitoring on the power battery pack, obtain safety monitoring data, and send the safety monitoring data to the second controller.

10. A vehicle, characterized in that, include: The data acquisition system according to any one of claims 1-9.

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