BMS system integrated with European standard PLC communication

Abstract

The invention provides a BMS system integrated with European standard PLC communication, and relates to the technical field of electric vehicle battery management, the BMS system comprises a BMS module, the BMS module comprises a BMS battery management unit and a BMS master control MCU, the BMS master control MCU is connected with a charging communication PLC chip, and the BMS battery management unit and the charging communication PLC chip are both integrated with the BMS master control MCU. According to the invention, the charging communication PLC chip is integrated into the BMS module, so that the BMS system is higher in integration level and charging compatibility, can be compatible with national standard charging and European standard charging, can directly save the cost of an EVCC main chip, saves the cost of a housing and a mounting bracket of the EVCC, and is lower in cost during application.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle battery management, and more specifically, to a BMS system integrating European standard PLC communication. Background Art

[0002] With the booming development of electric vehicles and electric commercial vehicles, more and more automobile enterprises have begun to launch their products into overseas markets. However, the charging standards for new energy vehicles globally are not unified, and there are various standards such as the IEC standard, the CCS combined charging standard, the CHAdeMO standard, the SAE standard, and the GB / T standard. These standards have obvious differences and diversities in charging interfaces, charging strategies, and communication methods, bringing significant difficulties to the export of automobiles. To solve the problem of charging compatibility, there are mainly two solutions in the current market: one is to add an EVCC communication conversion module, and the other is to hard-integrate EVCC into the BMS. However, both of these methods have certain limitations. Adding an EVCC communication conversion module not only increases the complexity and cost of the system but also may introduce additional fault points. While hard-integrating EVCC into the BMS improves the system integration degree, it still requires additional EVCC main chips and CAN communication chips, resulting in a still high cost. Therefore, we make improvements and propose a BMS system integrating European standard PLC communication. Summary of the Invention

[0003] The purpose of the present invention is to address the problem of high cost in the current methods of adding an EVCC communication conversion module and hard-integrating EVCC into the BMS.

[0004] To achieve the above-mentioned invention purpose, the present invention provides a BMS system integrating European standard PLC communication to improve the above problems.

[0005] Specifically, this application is as follows: A BMS system integrating European standard PLC communication includes a BMS module. The BMS module includes a BMS battery management unit and a BMS main control MCU. The BMS main control MCU is connected to a charging communication PLC chip, and both the BMS battery management unit and the charging communication PLC chip are integrated with the BMS main control MCU.

[0006] As a preferred technical solution of this application, the BMS main control MCU is connected to an electronic lock drive circuit, and the electronic lock drive circuit is used to drive an electronic lock.

[0007] As a preferred technical solution of this application, the electronic lock drive circuit is an H-bridge circuit.

[0008] As a preferred technical solution of the present application, the charging communication PLC chip is connected to the BMS main control MCU through an SPI communication module, and the SPI communication module is used to implement SPI communication between the BMS main control MCU and the charging communication PLC chip.

[0009] As a preferred technical solution of the present application, the BMS main control MCU also integrates a CAN communication chip.

[0010] As a preferred technical solution of the present application, the BMS main control MCU is connected to BMS electronic components.

[0011] As a preferred technical solution of the present application, the charging communication PLC chip is connected to PLC electronic components.

[0012] As a preferred technical solution of the present application, the BMS main control MCU, the BMS battery management unit and the charging communication PLC chip cooperate to perform DC charging interaction with the charging pile to achieve European standard DC charging.

[0013] As a preferred technical solution of the present application, the BMS main control MCU, the BMS battery management unit and the charging gun cooperate to perform AC charging interaction with the AC charging pile to achieve European standard AC charging.

[0014] As a preferred technical solution of the present application, the BMS main control MCU, the BMS battery management unit and the CAN communication chip cooperate to perform interaction with the DC charging pile to achieve national standard DC charging.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the solution of the present application: In order to solve the problem of high cost in the prior art by adding an EVCC communication conversion module and hard integrating the EVCC into the BMS, in the present application, by integrating the charging communication PLC chip into the BMS module, the integration degree of the BMS system is higher, and the charging compatibility is stronger. It can be compatible with both national standard charging and European standard charging, and can directly save the cost of the EVCC main chip, and also save the cost of the EVCC housing and installation bracket, making the cost lower when the present application is applied. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the BMS system integrating European standard PLC communication provided by the present application.

[0017] Labels in the figure: 1. BMS battery management unit; 2. Electronic lock drive circuit; 3. BMS main control MCU; 4. SPI communication module; 5. CAN communication chip; 6. BMS electronic components; 7. Charging communication PLC chip; 8. PLC electronic components. Detailed Embodiments

[0018] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] As recorded in the background art, to solve the problem of charging compatibility, there are mainly two solutions in the current market: one is to add an EVCC communication conversion module, and the other is to hard-integrate EVCC into the BMS. However, both of these solutions have certain limitations. Adding an EVCC communication conversion module not only increases the complexity and cost of the system, but also may introduce additional fault points. While hard-integrating EVCC into the BMS improves the integration of the system, it still requires an additional EVCC main chip and CAN communication chip, resulting in a still relatively high cost.

[0020] To solve this technical problem, the present invention provides a BMS system integrating European standard PLC communication Specifically, please refer to Figure 1 , the BMS system integrating European standard PLC communication specifically includes: A BMS module, the BMS module includes a BMS battery management unit 1 and a BMS main control MCU 3. The BMS main control MCU 3 is connected to a charging communication PLC chip 7, and both the BMS battery management unit 1 and the charging communication PLC chip 7 are integrated with the BMS main control MCU 3.

[0021] For the BMS system integrating European standard PLC communication provided by the present invention, in this application, by integrating the charging communication PLC chip 7 into the BMS module, the BMS system has a higher integration degree and stronger charging compatibility. It can be compatible with both national standard charging and European standard charging, and can directly save the cost of the EVCC main chip, and also save the cost of the EVCC housing and installation bracket, making the cost lower when this application is used.

[0022] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings.

[0023] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0024] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] For Embodiment 1, please refer to Figure 1 , a BMS system integrating European standard PLC communication, including a BMS module. The BMS module includes a BMS battery management unit 1 and a BMS main control MCU 3. The BMS main control MCU 3 is connected to a charging communication PLC chip 7. Both the BMS battery management unit 1 and the charging communication PLC chip 7 are integrated with the BMS main control MCU 3. Integrating the charging communication PLC chip 7 with the BMS main control MCU 3 greatly simplifies the system architecture. From the perspective of hardware connection, it significantly reduces the wiring length and complexity between chips, reduces risks such as signal attenuation and electromagnetic interference caused by long lines, and thus effectively improves the quality and stability of signal transmission. In terms of the collaborative work of the system, integration makes each functional module physically closer, which helps to achieve more efficient resource sharing and task scheduling.

[0026] Furthermore, as Figure 1 shown, the BMS main control MCU 3 is connected to an electronic lock drive circuit 2. The electronic lock drive circuit 2 is used to drive the electronic lock. In the charging scenario, the electronic lock drive circuit 2 can accurately control the opening and closing state of the electronic lock. When charging starts, the electronic lock can be automatically locked to prevent accidental detachment or malicious plugging of the charging interface, effectively avoiding dangerous situations such as electric arcs and short circuits caused by connection interruptions, and ensuring the electrical safety during the charging process. During vehicle parking or transportation, the electronic lock can also play an anti-theft role, preventing unauthorized personnel from operating the battery system and ensuring the property safety of the battery and the whole vehicle. In addition, by controlling the electronic lock through the circuit, linkage with other systems can also be achieved, such as automatically unlocking after charging is completed, improving the convenience and intelligent experience of users.

[0027] Furthermore, the electronic lock drive circuit 2 is an H-bridge circuit, which can directly drive the electronic lock and adapt to foreign charging schemes. Using an H-bridge circuit as the electronic lock drive circuit has multiple advantages. Its strong driving ability can meet the working requirements of different types of electronic locks. Whether it is a low-impedance or high-impedance electronic lock, it can be stably driven to ensure the accuracy and reliability of the electronic lock operation. In terms of adapting to foreign charging schemes, due to the diversity and complexity of foreign charging facilities, the flexibility of the H-bridge circuit enables it to better match various specifications of charging interfaces and control logics.

[0028] Embodiment 2 further optimizes the BMS system integrating European standard PLC communication provided in Embodiment 1. Specifically, as Figure 1As shown, a SPI communication module 4 is connected between the charging communication PLC chip 7 and the BMS master MCU 3. The SPI communication module 4 is used to implement SPI communication between the BMS master MCU 3 and the charging communication PLC chip 7. The introduction of the SPI communication module 4 constructs a data transmission channel between the BMS master MCU 3 and the charging communication PLC chip 7, meeting the rapid exchange requirements of a large amount of data during the charging process. For example, real-time data such as charging current, voltage, and battery temperature can be accurately transmitted within a very short time, enabling the BMS master MCU 3 to adjust the charging strategy in a timely manner based on this data, avoiding charging abnormalities caused by data update delays, such as overcharging and over-discharging, effectively improving the charging safety and service life of the battery. At the same time, the reliability of the SPI communication module 4 ensures the accuracy of the data transmission process. The extremely low error rate enables the accurate interaction of instructions between the charging communication PLC chip 7 and the BMS master MCU 3, thus ensuring the smooth progress of the entire charging management process, significantly optimizing the charging performance, and bringing a faster, safer, and more reliable charging experience to users.

[0029] Furthermore, as Figure 1 shown, the BMS master MCU 3 is also integrated with a CAN communication chip 5. Integrating the CAN communication chip 5 endows the system with strong expansion and compatibility capabilities. In the vehicle's electronic and electrical architecture, the CAN bus is a widely used communication standard, and numerous electronic control units (ECUs) exchange information through the CAN bus. After the BMS master MCU 3 of this system integrates the CAN communication chip 5, it can seamlessly access the vehicle's CAN network and share real-time data and work collaboratively with other ECUs such as the engine control unit, brake control unit, and instrument display unit.

[0030] Furthermore, as Figure 1 shown, the BMS master MCU 3 is connected to BMS electronic components 6. The BMS electronic components 6 cover key components such as battery voltage monitoring chips, current sensors, and temperature sensors. The voltage monitoring chip can accurately measure the voltage of each battery in the battery pack, and keep real-time track of the voltage balance of the battery. Once an abnormal voltage of a certain battery is detected, it immediately notifies the master MCU to take corresponding balancing measures to prevent the battery from being damaged due to overvoltage or undervoltage, and extend the overall service life of the battery pack. The current sensor can accurately measure the magnitude of the charging and discharging current of the battery, providing accurate current data for the master MCU, so as to reasonably adjust the charging current according to the capacity and state of the battery during the charging process, avoiding irreversible damage to the battery caused by overcurrent charging; during the discharging process, it can also accurately control the discharging current of the battery according to the power demand of the vehicle, improving the energy utilization efficiency of the battery. The temperature sensor monitors the temperature change of the battery in real time.

[0031] Furthermore, as Figure 1As shown, the charging communication PLC chip 7 is connected to the PLC electronic component 8. The PLC electronic component 8 includes functional modules such as a signal conditioning circuit and an isolation circuit. The signal conditioning circuit can amplify, filter, shape, etc. various analog signals from the charging pile or the charging gun, and convert them into standard signals that the charging communication PLC chip 7 can accurately identify, improving the quality and reliability of the signals, ensuring that the charging communication PLC chip 7 can obtain accurate charging parameter information, such as the actual values of charging voltage and current, etc.; the isolation circuit establishes an electrical isolation barrier between the charging communication PLC chip 7 and the external charging device, effectively preventing chip damage caused by external electrical interference or faults, and at the same time ensuring the electrical safety of the system, avoiding the impact of safety accidents caused by charging device failures on the entire BMS system, improving the stability and reliability of the system in a complex charging environment, and ensuring the smooth progress of the charging process.

[0032] In this application, the charging communication PLC chip 7 and the PLC electronic component 8 can be directly integrated into the PCB hardware of the BMS module, which can directly save the cost of the EVCC main chip and the cost of the EVCC housing and mounting bracket, making the system cost lower and the system integration higher, and can directly reduce the layout space of the EVCC on the vehicle, improving the vehicle integration.

[0033] In the initial stage of battery management development, integrating the charging communication PLC chip 7 into the BMS module. From the perspective of system development, the charging communication PLC chip 7 and the BMS module share a BMS main control MCU3. While saving the MCU, a set of software platforms can be shared, reducing the structural development and mounting bracket development of the EVCC module.

[0034] Embodiment 3 further optimizes the BMS system integrating the European standard PLC communication provided in Embodiment 1 or 2. Specifically, the BMS main control MCU3, the BMS battery management unit 1 and the charging communication PLC chip 7 cooperate to perform DC charging interaction with the charging pile to achieve European standard DC charging.

[0035] Furthermore, the BMS main control MCU3, the BMS battery management unit 1 and the charging gun cooperate to perform AC charging interaction with the AC pile to achieve European standard AC charging.

[0036] Furthermore, the BMS main control MCU3, the BMS battery management unit 1 and the CAN communication chip 5 cooperate to perform interaction with the DC pile to achieve national standard DC charging.

[0037] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all of the embodiments. The preferred embodiments of the present invention are given in the drawings, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields shall be similarly within the scope of the patent protection of the present invention.

Claims

1. A BMS system integrating European standard PLC communication, characterized in that: The invention comprises a BMS module, wherein the BMS module comprises a BMS battery management unit (1) and a BMS main control MCU (3), wherein the BMS main control MCU (3) is connected to a charging communication PLC chip (7), and the BMS battery management unit (1) and the charging communication PLC chip (7) are integrated with the BMS main control MCU (3).

2. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The BMS main control MCU (3) is connected to an electronic lock driving circuit (2), and the electronic lock driving circuit (2) is used to drive the electronic lock.

3. A BMS system with integrated European standard PLC communication according to claim 2, characterized in that: The electronic lock driving circuit (2) is an H-bridge circuit.

4. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The charging communication PLC chip (7) and the BMS main control MCU (3) are connected to an SPI communication module (4), and the SPI communication module (4) is used to realize SPI communication between the BMS main control MCU (3) and the charging communication PLC chip (7).

5. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The BMS main control MCU (3) is also integrated with a CAN communication chip (5).

6. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The BMS main control MCU (3) is connected to a BMS electronic component (6).

7. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The charging communication PLC chip (7) is connected to a PLC electronic component (8).

8. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The BMS main control MCU (3), the BMS battery management unit (1) and the charging communication PLC chip (7) cooperate with the charging pile to perform direct current charging interaction, so as to realize European standard direct current charging.

9. A BMS system with integrated European standard PLC communication according to claim 1, characterized in that: The BMS main control MCU (3), the BMS battery management unit (1) and the charging gun cooperate to perform AC charging interaction with the AC pile to achieve European standard AC charging.

10. A BMS system with integrated European standard PLC communication according to claim 5, characterized in that: The BMS main control MCU (3), the BMS battery management unit (1) and the CAN communication chip (5) cooperate to interact with the DC charging pile to achieve national standard DC charging.

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