A protocol conversion CAN repeater for plug-in and pure electric new energy commercial vehicles

Abstract

The utility model discloses a kind of CAN repeaters for the protocol conversion of plug-in and pure electric new energy commercial vehicle, the repeater is configured to include: CAN communication module, for with whole car CAN network and BMS CAN network communication connection;Central processing unit MCU, with the CAN communication module communication connection, for protocol conversion.This CAN repeater configuration MCU realizes the conversion of protocol, when replacing battery equipment, realize automatic matching, whole car no longer needs to replace the battery like original vehicle, but can be flexibly selected and replaced according to market existing battery, improve the flexibility of battery replacement.

Description

Technical Field

[0001] This utility model relates to a CAN repeater for protocol conversion in plug-in and pure electric new energy commercial vehicles. Background Technology

[0002] A CAN repeater is a device that connects network lines, commonly used for bidirectional forwarding of physical signals between two network nodes. A repeater is a relatively simple network interconnection device, primarily performing physical layer functions. It is responsible for transmitting information bit by bit at the physical layer between two nodes, performing functions such as signal replication, adjustment, and amplification, thereby extending the network length. CAN repeaters operate at the OSI physical layer and are the center of all nodes within a local area network. Their function is to amplify signals, compensate for signal attenuation, and support long-distance communication.

[0003] In plug-in hybrid and pure electric new energy commercial vehicles, the battery management system (BMS, primarily for intelligent management and maintenance of individual battery cells, preventing overcharging and over-discharging, extending battery life, and monitoring battery status), vehicle controller, and motor controller communicate via CAN for command control and information exchange. The communication content (also known as the communication protocol) between these components is determined by the vehicle manufacturer or powertrain manufacturer, depending on the complexity of the vehicle. Each component operates according to the established communication protocol. If a component is replaced in the system, the new component's communication protocol must adhere to the previous protocol, or a protocol conversion device must be added to convert the new device's protocol to the original component's protocol; otherwise, the system will not function. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model provides a CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles. This repeater can complete the protocol conversion between the new battery and the vehicle, thereby solving the problem of battery replacement flexibility.

[0005] The CAN repeater provided by this utility model is configured to include:

[0006] The CAN communication module is used for communication connection with the vehicle's CAN network and the BMS CAN network;

[0007] The central processing unit (MCU) is connected to the CAN communication module for protocol conversion.

[0008] Furthermore, the CAN receiving module includes a vehicle CAN network CAN receiving module and a BMS CAN network CAN receiving module.

[0009] Furthermore, the CAN transmitting module includes a vehicle CAN network CAN generating module and a BMS CAN network CAN transmitting module.

[0010] Furthermore, the central processing unit (MCU) includes a CAN data transceiver module, a data comparison module, and a data conversion and generation module. The CAN data transceiver module is communicatively connected to the CAN communication module. The data comparison module is configured between the CAN data transceiver module and the data conversion and generation module. The data conversion and generation module is communicatively connected to the CAN data transceiver module.

[0011] Furthermore, the repeater is also configured to include a power supply module that powers the CAN communication module and the central processing unit MCU, the power supply module being used to convert 18V to 32V DC power into 5V DC power.

[0012] The beneficial effects of this utility model are as follows: This CAN repeater is equipped with an MCU to realize protocol conversion. When the battery device is replaced, automatic matching is achieved. The whole vehicle no longer needs to be replaced with the same battery as the original vehicle. Instead, it can be flexibly selected and replaced according to the existing batteries on the market, which improves the flexibility of battery replacement. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this application, the accompanying drawings used or involved in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and other drawings can be obtained based on these drawings without creative effort:

[0014] Figure 1 This is a schematic block diagram of the CAN repeater provided by this utility model. Detailed Implementation

[0015] This section describes the invention more fully with reference to the accompanying drawings, in which illustrative embodiments of the invention are shown. However, the invention is also embodied in many different forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure is thorough and complete, and to fully convey the scope of the invention to those skilled in the art.

[0016] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprising” and “including,” as used herein, specify the presence of the illustrated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0017] Unless defined to the contrary, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in common dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant field, and will not be interpreted in an idealized or highly formal sense unless specifically defined herein.

[0018] Please refer to Figure 1 The CAN repeater for protocol conversion in plug-in and pure electric new energy commercial vehicles provided by this utility model is configured to include a CAN communication module and a central processing unit (MCU).

[0019] The CAN communication module is used for communication with the vehicle's CAN network and the BMS CAN network. It includes a CAN receiving module and a CAN transmitting module. The CAN receiving module includes a vehicle CAN network receiving module that communicates with the vehicle's CAN network and a BMS CAN network receiving module that communicates with the vehicle's battery management system CAN network (BMS CAN network). The CAN transmitting module includes a vehicle CAN network transmitting module that communicates with the vehicle's CAN network and a BMS CAN network transmitting module that communicates with the vehicle's battery management system CAN network (BMS CAN network). The vehicle CAN network refers to the CAN network in the vehicle's central control system. This repeater communicates with the CAN network of the vehicle's central control system via a data cable, and then uses the CAN communication protocol to achieve data transmission.

[0020] The central processing unit (MCU) communicates with the CAN communication module and performs user protocol conversion. The MCU has a storage function, capable of storing existing protocol identification programs, protocol comparison programs, and protocol generation and transmission programs. The programs described here refer to the CAN communication protocol, specifically the CAN communication protocol of the battery management system in plug-in hybrid and pure electric new energy commercial vehicles, and the CAN protocol of the vehicle's central control system. These protocols are written by the manufacturer before the vehicle and equipment leave the factory. This repeater only acts as a storage device, storing and comparing the stored protocols. Based on the comparison results, it selects the pre-stored CAN protocol and transmits it through the CAN communication module to the vehicle's CAN network and the BMS CAN network to achieve matching between the BMS CAN network and the vehicle's CAN network.

[0021] Please refer to Figure 1 The central processing unit (MCU) includes a CAN data transceiver module, a data comparison module, and a data conversion and generation module. The CAN data transceiver module is connected to the CAN communication module. The data comparison module is configured between the CAN data transceiver module and the data conversion and generation module. The data conversion and generation module is connected to the CAN data transceiver module.

[0022] The repeater is also configured to include a power supply module that powers the CAN communication module and the central processing unit MCU. The power supply module uses any existing DC-DC converter module to convert 18V to 32V DC to 5V DC.

[0023] This disclosure has been described with reference to the foregoing embodiments; however, these embodiments are merely examples for implementing this disclosure. It must be noted that the disclosed embodiments do not limit the scope of this disclosure. On the contrary, any changes and modifications made without departing from the spirit and scope of this disclosure are within the scope of patent protection of this disclosure.

Claims

1. A CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles, characterized in that, The repeater is configured to include: The CAN communication module is used for communication connection with the vehicle's CAN network and the BMS CAN network; The central processing unit (MCU) is connected to the CAN communication module for protocol conversion.

2. The CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles according to claim 1, characterized in that, The CAN communication module includes a CAN receiving module and a CAN transmitting module.

3. The CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles according to claim 2, characterized in that, The CAN receiving module includes a vehicle CAN network CAN receiving module and a BMS CAN network CAN receiving module.

4. The CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles according to claim 2, characterized in that, The CAN transmission module includes a vehicle CAN network CAN generation module and a BMS CAN network CAN transmission module.

5. The CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles according to claim 1, characterized in that, The central processing unit (MCU) includes a CAN data transceiver module, a data comparison module, and a data conversion and generation module. The CAN data transceiver module is communicatively connected to the CAN communication module. The data comparison module is configured between the CAN data transceiver module and the data conversion and generation module. The data conversion and generation module is communicatively connected to the CAN data transceiver module.

6. The CAN repeater for protocol conversion in plug-in hybrid and pure electric new energy commercial vehicles according to claim 1, characterized in that, The repeater is also configured to include a power module that powers the CAN communication module and the central processing unit MCU, the power module being used to convert 18V to 32V DC power into 5V DC power.

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