CN217770130U

CN217770130U - Test system of daisy chain communication tool and battery management system

Info

Publication number: CN217770130U
Application number: CN202221292324.3U
Authority: CN
Inventors: 俞奇超
Original assignee: Hangzhou Xieneng Technology Co ltd
Current assignee: Hangzhou Xieneng Technology Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-11-08
Anticipated expiration: 2032-05-24

Abstract

The utility model provides a test system of daisy chain communication tool and battery management system, including signal conversion module, signal processing module and communication module, signal conversion module with signal processing module is connected, signal processing module with communication module is connected; the signal conversion module is used for converting daisy chain signals into SPI signals, the signal processing module is used for processing the SPI signals into UART signals, and the communication module is used for converting the UART signals into 485 communication signals or CAN communication signals. The utility model can realize that the battery management system adopting the daisy chain communication mode can be connected with an upper computer for testing before the system is built; in addition, the daisy chain communication tool is powered by the upper computer, and an alternating current commercial power is not required to be additionally provided, so that the operation is convenient and safe.

Description

Test system of daisy chain communication tool and battery management system

Technical Field

The utility model relates to the field of communication technology, especially, relate to daisy chain communication tool, battery management system's test system.

Background

At present, energy storage system and electric automobile are developing rapidly, and the market demand of the battery module that they used also increases day by day, and battery module generally disposes Battery Management System (BMS), and BMS adopts CAN communication mode usually, and this kind of communication mode is with high costs, is unfavorable for market competition, and consequently, the producer adopts the daisy chain communication mode under the reliable prerequisite of assurance communication to reduce BMS's device cost, thereby obtain market competition.

Before the battery module is put into use, the BMS needs to be tested, and whether the wiring of each monomer electricity core is reliable or not, accurate in main test BMS and the battery module to and whether each monomer electricity core has a fault or not are tested. Before be through CAN communication mode and test upper computer connection test, after BMS changes to adopting daisy chain communication mode, unable and test upper computer direct set up communication connection, CAN only wait to test after the power supply system of energy storage or electric automobile's power supply system build the completion again, if finding the problem under this kind of circumstances when testing, need rewiring or change battery management system, when extravagant power supply system early build, and on-the-spot maintenance is changed inconvenient. In addition, if before the power supply system is built, one of the battery modules in the power supply system needs to be tested, a high-voltage box needs to be arranged and provides 220V alternating current for the high-voltage box, and the high-voltage box is large in size, inconvenient to move and unsafe for 220V mains supply.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a testing system for a daisy chain communication tool and a battery management system, which can test the battery management system using daisy chain communication before the power supply system is built.

In order to achieve the above object, the present invention provides a daisy chain communication tool, which includes a signal conversion module, a signal processing module and a communication module, wherein the signal conversion module is connected to the signal processing module, and the signal processing module is connected to the communication module; the signal conversion module is used for converting daisy chain signals into SPI signals, the signal processing module is used for processing the SPI signals into UART signals, and the communication module is used for converting the UART signals into 485 communication signals or CAN communication signals.

Optionally, the signal conversion module includes a daisy chain communication interface, and the communication module includes a 485 communication interface or a CAN communication interface.

Optionally, the SPI signal is a 4-wire SPI signal, and the signal conversion module and the signal processing module communicate with each other through the 4-wire SPI signal.

Optionally, the daisy chain communication interface and the 485 communication interface or the CAN communication interface are respectively located at two ends of the PCB.

The utility model also provides a test system of battery management system, battery management system includes daisy chain communication interface, test system includes the daisy chain communication tool, serial port instrument and the host computer of any one above-mentioned, the one end of serial port instrument is connected the daisy chain communication tool, and the other end is connected the host computer; the upper computer supplies power to the daisy chain communication tool through the serial port tool, during testing, the daisy chain communication tool is connected with a daisy chain communication interface of the battery management system, a daisy chain signal of the battery management system is converted into a 485 communication signal or a CAN communication signal, information is sent to the upper computer through the serial port tool, and the upper computer tests the battery management system according to the information.

Optionally, one end of the serial port tool is a 485 communication interface or a CAN communication interface, and the other end of the serial port tool is a USB interface, and the serial port tool is connected with the upper computer through the USB interface.

Optionally, the upper computer provides a DC5V power supply to the daisy chain communication tool through the serial port tool.

Optionally, the battery management system includes a slave control module, and the slave control module is provided with the daisy chain communication interface.

Optionally, the slave control module is connected with the single battery cell through a wire harness, collects data information of the single battery cell, and sends the data information to the upper computer through the daisy chain communication tool and the serial port tool, and the upper computer tests the battery management system according to the data information of the single battery cell.

Optionally, the data information of the individual electric core includes temperature data and voltage data of the individual electric core, and whether the individual electric core has a fault is tested according to the temperature data and the voltage data.

Compared with the prior art, the technical scheme of the utility model has following advantage: the daisy chain signal is converted into the SPI signal, the SPI signal is processed into the UART signal, and the UART signal is converted into the 485 communication signal or the CAN communication signal, so that the battery management system adopting the daisy chain communication mode CAN be connected with an upper computer for testing before the system is built; in addition, the upper computer is used for supplying power to the daisy chain communication tool, and alternating current commercial power does not need to be additionally provided, so that the operation is convenient and safe.

Drawings

Fig. 1 is a schematic diagram of a daisy chain communication tool provided by the present invention;

fig. 2 is a schematic diagram of a test system of a battery management system provided by the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to only these embodiments. The present invention covers any alternatives, modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.

The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are simplified and in non-precise proportion, and are only used for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.

Please refer to fig. 1, which is a schematic diagram of a daisy chain communication tool according to the present invention. The daisy chain communication tool is used to convert the daisy chain communication signal into a 485 communication signal or a CAN communication signal, and the conversion into the 485 communication signal is taken as an example in this embodiment. As shown in fig. 1, the daisy chain communication tool 2 includes a signal conversion module 21, a signal processing module 22 and a communication module 23, the signal conversion module 21 is connected to the signal processing module 22 through SPI signal communication, the signal processing module 22 is connected to the communication module 23 through UART signal communication, wherein the signal conversion module 21 includes a daisy chain communication interface 211 for connecting to a device using daisy chain communication, and the communication module 23 includes a 485 communication interface 231 for connecting to a device using 485 communication.

When the daisy chain communication device is used, the daisy chain communication interface 211 of the signal conversion module 21 is connected with a device using daisy chain communication, a received daisy chain communication signal is converted into an SPI signal which can be a 4-wire SPI signal, then the SPI signal is transmitted to the signal processing module 22, the signal processing module 22 processes the received SPI signal into a UART signal and transmits the UART signal to the communication module 23, and finally the communication module 23 converts the UART signal into a 485 communication signal according to a specific communication protocol, so that the daisy chain communication signal is converted into the 485 communication signal, and communication between the daisy chain communication device and the 485 communication device is realized. Specifically, the daisy chain communication tool can be in a PCBA form, the signal conversion module 21, the signal processing module 22 and the communication module 23 are all arranged on the PCB, the volume is small, the weight is light, the carrying is convenient, the operation is easy, and the daisy chain communication interface and the 485 communication interface are respectively arranged at two ends of the PCB.

Please refer to fig. 2, which is a schematic diagram of a testing system of a battery management system according to the present invention. The test system comprises the daisy chain communication tool 2, a serial port tool 3 and an upper computer 4, wherein the daisy chain communication tool 2 is connected with the battery management system 1, one end of the serial port tool 3 is connected with the daisy chain communication tool 2, and the other end of the serial port tool is connected with the upper computer 4.

The battery management system 1 is tested, whether the data information of the single battery cell can be normally acquired or not is mainly seen through the upper computer 4, whether wiring is correct and reliable or not is judged, and the data information of the single battery cell comprises the temperature, the voltage and the like of the single battery cell. In this embodiment, the battery management system 1 adopts a daisy chain communication mode, and includes the slave control module 11, the slave control module 11 is provided with a daisy chain communication interface 111, and the slave control module 11 is connected with the single battery cell through a wire harness to collect data information of the single battery cell, such as temperature, voltage, and the like.

When the test is carried out, the upper computer 4 supplies power to the daisy chain communication tool 2 through the serial port tool 3, and no additional power supply equipment or power supply is needed, so that the operation is convenient. Because the battery management system 1 adopts a daisy chain communication mode, after the temperature and voltage data of the single battery cells are collected from the control module 11, the daisy chain communication signals are sent out, the daisy chain communication tool 2 is connected with the daisy chain communication interface 111 of the slave control module 11, the daisy chain signals of the battery management system 1 are converted into 485 communication signals or CAN communication signals according to a communication protocol, and the information is sent to the upper computer 4 through the serial port tool 3, the upper computer 4 visually displays the received information on the temperature and voltage data of the single battery cells, if the data are normally displayed, the wiring of the tested battery management system 1 is normal, and if the data cannot be normally displayed, the data are abnormal, and further examination is needed; in addition, whether the single battery core has a fault or not is tested by judging whether the temperature data and the voltage data of the single battery core are abnormal or not, so that the battery management system 1 can be tested without being built in a whole power supply system.

Specifically, serial port instrument 3 is the serial port instrument that USB changes 485 or CAN communication, and its one end is 485 communication interfaces or CAN communication interfaces, and the other end is the USB interface, CAN be USB's public interface, is equipped with the female interface of matching USB on the host computer 4 to through the USB interface with serial port instrument 3 is connected, provides DC5V power to daisy chain communication instrument 2, need not to provide in addition and exchanges the commercial power, convenient operation, safety.

Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that alternatives to and integrations of the embodiments may be made as part of the common general knowledge, and reference may be made to one of the embodiments without explicit recitation.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A daisy-chain communication tool, comprising:

the device comprises a signal conversion module, a signal processing module and a communication module, wherein the signal conversion module is connected with the signal processing module, and the signal processing module is connected with the communication module;

the signal conversion module is used for converting daisy chain signals into SPI signals, the signal processing module is used for processing the SPI signals into UART signals, and the communication module is used for converting the UART signals into 485 communication signals or CAN communication signals.

2. The daisy chain communication tool of claim 1, wherein: the signal conversion module comprises a daisy chain communication interface, and the communication module comprises a 485 communication interface or a CAN communication interface.

3. The daisy chain communication tool of claim 1, wherein: the SPI signal is a 4-wire SPI signal, and the signal conversion module is communicated with the signal processing module through the 4-wire SPI signal.

4. The daisy chain communication tool of claim 2, wherein: the daisy chain communication interface and the 485 communication interface or the CAN communication interface are respectively positioned at two ends of the PCB.

5. A test system for a battery management system, the battery management system including a daisy-chain communication interface, the test system comprising:

the test system comprises the daisy chain communication tool according to any one of claims 1 to 4, a serial port tool and an upper computer, wherein one end of the serial port tool is connected with the daisy chain communication tool, and the other end of the serial port tool is connected with the upper computer;

the upper computer supplies power to the daisy chain communication tool through the serial port tool, during testing, the daisy chain communication tool is connected with a daisy chain communication interface of the battery management system, a daisy chain signal of the battery management system is converted into a 485 communication signal or a CAN communication signal, information is sent to the upper computer through the serial port tool, and the upper computer tests the battery management system according to the information.

6. The battery management system test system of claim 5, wherein: one end of the serial port tool is a 485 communication interface or a CAN communication interface, and the other end of the serial port tool is a USB interface, and the serial port tool is connected with the upper computer through the USB interface.

7. The battery management system test system of claim 6, wherein: and the upper computer provides a DC5V power supply for the daisy chain communication tool through the serial port tool.

8. The battery management system test system of claim 6, wherein: the battery management system comprises a slave control module, and the slave control module is provided with the daisy chain communication interface.

9. The battery management system test system of claim 8, wherein: the slave control module is connected with the single battery cell through a wire harness, acquires data information of the single battery cell, and sends the data information to the upper computer through the daisy chain communication tool and the serial port tool, and the upper computer tests the battery management system according to the data information of the single battery cell.

10. The battery management system test system of claim 9, wherein: the data information of the single battery cell comprises temperature data and voltage data of the single battery cell, and whether the single battery cell has faults or not is tested through the temperature data and the voltage data.