CN219657840U

CN219657840U - BMU testing arrangement

Info

Publication number: CN219657840U
Application number: CN202320282233.XU
Authority: CN
Inventors: 邓秉杰; 王伟平; 熊刚; 孔腾; 刘汤明
Original assignee: Fujian Nebula Electronics Co Ltd
Current assignee: Fujian Nebula Electronics Co Ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-09-08
Anticipated expiration: 2033-02-22

Abstract

The utility model provides a BMU testing device in the technical field of BMU testing, which comprises BMS testing equipment, a communication bus tool, a communication board card, a PC and a wireless communication module; the BMS test equipment is provided with a plurality of BCU simulators for simulating voltage, current and temperature of the battery cells during charging and discharging; one end of each BCU simulator is connected with the communication bus tool, and the other end of each BCU simulator is connected with the communication board card; the PC is connected with the BMS test equipment and the communication board card respectively; the wireless communication module is connected with the communication board card. The utility model has the advantages that: the BMU testing convenience is greatly improved, and the BMU testing cost is greatly reduced.

Description

BMU testing arrangement

Technical Field

The utility model relates to the technical field of BMU (body Mass Unit) testing, in particular to a BMU testing device.

Background

BMS (battery management system) also calls battery caregivers or battery households for each unit of intelligent management and maintenance battery embody in carrying out real-time supervision and management to the state of battery, prevent that the battery from appearing overcharging or putting excessively and leading to the incident in the in-process of charging and using, and prolong the life of battery.

The BMS is composed of a BCU (collector) and a BMU (battery management unit), the BCU is responsible for collecting charge and discharge data such as current, voltage and temperature of the battery, the charge and discharge data are transmitted to the BMU through CAN or ISOSPI, the BMU is responsible for carrying out calculation and analysis on the received charge and discharge data, and further, the charge and discharge process of the current is controlled, so that protection of the battery is achieved, and the comprehensive performance of the battery is improved.

After the BMU is produced, the BMU needs to be subjected to factory testing, however, traditional testing equipment aims at ring testing of the BMS, the BMU needs to be connected to the BCU in the testing process, and the BMU is connected to a related battery simulator, a temperature simulator and the like, so that the equipment is large in size, high in cost, complex in wiring and high in testing energy consumption.

Through searching, the Chinese patent application with the filing date of 2019.09.26 and the filing number of CN201910917314.0 discloses a system and a method for testing the hardware of a battery management system of a new energy automobile in a ring.

Therefore, how to provide a BMU testing device, to improve the convenience of BMU testing and reduce the cost of BMU testing, is a technical problem to be solved urgently.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a BMU testing device, which can improve BMU testing convenience and reduce BMU testing cost.

The utility model provides a BMU testing device, which comprises BMS testing equipment, a communication bus tool, a communication board card, a PC and a wireless communication module, wherein the BMU testing equipment is connected with the communication board card; the BMS test equipment is provided with a plurality of BCU simulators for simulating voltage, current and temperature of the battery cells during charging and discharging;

one end of each BCU simulator is connected with the communication bus tool, and the other end of each BCU simulator is connected with the communication board card; the PC is connected with the BMS test equipment and the communication board card respectively; the wireless communication module is connected with the communication board card.

Further, the wireless communication module is at least one of a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module or a ZigBee communication module.

The utility model has the advantages that:

the voltage, current and temperature of the battery cells during charging and discharging can be directly simulated and output by arranging the BCU simulator to replace the traditional BCU, and the battery simulator, the temperature simulator and the like are not needed to be connected, so that the volume of equipment is reduced, the cost and the test energy consumption are reduced, the wiring is simplified, the BMU test convenience is greatly improved, and the BMU test cost is greatly reduced.

Drawings

The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of a BMU test device according to the utility model.

Fig. 2 is a flow chart of the working principle of the utility model.

Detailed Description

The technical scheme in the embodiment of the utility model has the following overall thought: the BCU simulator is arranged to replace the traditional BCU, and related battery simulators, temperature simulators and the like are not needed to be connected, so that BMU testing convenience is improved, and BMU testing cost is reduced.

Referring to fig. 1 to 2, a preferred embodiment of a BMU testing apparatus according to the present utility model includes a BMS testing device, a communication bus fixture, a communication board card, a PC and a wireless communication module; the BMS test equipment is provided with a plurality of BCU simulators for simulating voltage, current and temperature of the battery cells during charging and discharging; the BCU simulator is used for replacing BCU needed to be used in BMU test, and the BCU simulator does not need voltage, current and temperature during actual charging and discharging of the current core, and only needs to simulate and output according to test parameters issued by the PC; the communication board card is used for communication between the BCU simulator and the PC; the PC is used for controlling the work of the BMU testing device; the communication bus tool is used for connecting the BCU simulator with the BMU to be tested; the wireless communication module is used for remotely controlling the BMU testing device or sending the testing result outwards;

The wireless communication module is at least one of a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module or a ZigBee communication module.

The working principle of the utility model comprises the following steps:

step S10, connecting a BMU to be tested to a communication bus tool and a PC, and powering up and initializing a BMU testing device;

step S20, inputting test parameters, test steps and test judgment conditions of each test item in advance through a PC; the test items are a data monitoring function, an overvoltage monitoring function, an undervoltage monitoring function, an overtemperature monitoring function and a voltage equalizing monitoring function;

step S30, the PC matches corresponding test parameters, test steps and test judgment conditions based on the received test instructions so as to control the BCU simulator to test the BMU to be tested for data monitoring function, overvoltage monitoring function, undervoltage monitoring function, overtemperature monitoring function and voltage equalizing monitoring function.

The test parameters, the test steps and the test judgment conditions of each test item are input in advance in the PC, and the PC is matched with the corresponding test parameters, the corresponding test steps and the corresponding test judgment conditions based on the received test instructions, so that the BCU simulator is controlled to perform the test of the data monitoring function, the overvoltage monitoring function, the undervoltage monitoring function, the overtemperature monitoring function and the voltage equalizing monitoring function on the BMU to be tested, and the comprehensiveness of the BMU test is greatly improved.

In step S20, the test parameters are voltage and temperature simulated and output by each BCU simulator, and a protection duration threshold of the BMU.

In the step S30, the data monitoring function test specifically includes:

step S311, the PC sets the voltage and the temperature output by each BCU simulator to the BMU to be tested based on the test parameters;

step S312, the PC acquires the acquired voltage and temperature from the BMU to be tested, judges whether the acquired voltage and temperature are consistent with the set value, and if yes, enters step S313; if not, generating a test result of abnormal data monitoring function;

step S313, the PC changes the voltage and the temperature output by the BCU simulator to the BMU to be tested;

step S314, after the PC delays for a specified time, acquiring the acquired voltage and temperature from the BMU to be tested, judging whether the acquired voltage and temperature are consistent with the set value again, and if so, generating a test result with normal data monitoring function; if not, generating a test result of the data monitoring function abnormality. The accuracy of the data monitoring function test is effectively improved by changing the voltage and the temperature output by the BMU simulator to be tested and performing secondary test.

In the step S30, the overvoltage monitoring function test specifically includes:

step S321, the PC sets the voltage output by at least one BCU simulator to the BMU to be tested as an overvoltage value based on the test parameters;

step S322, the PC judges whether overvoltage protection is promoted or not based on the BMS test equipment and feedback data of the BMU to be tested, if yes, step S323 is entered; if not, generating a test result of the overvoltage monitoring function abnormality;

step 323, the PC judges whether the time consumption for triggering overvoltage protection is within the protection duration threshold, if yes, a test result with normal overvoltage monitoring function is generated; if not, generating a test result of the overvoltage monitoring function abnormality.

In the step S30, the undervoltage monitoring function test specifically includes:

step S331, the PC sets the voltage output by at least one BCU simulator to the BMU to be tested as an under-voltage value based on the test parameters;

step S332, the PC judges whether to trigger the under-voltage protection based on the feedback data of the BMU to be tested, if yes, the step S333 is entered; if not, generating a test result of the undervoltage monitoring function abnormality;

step S333, the PC judges whether the time consumption for triggering the undervoltage protection is within the protection duration threshold, if yes, a test result with normal undervoltage monitoring function is generated; if not, generating a test result of the undervoltage monitoring function abnormality.

In the step S30, the over-temperature monitoring function test specifically includes:

step S341, the PC sets the temperature output by at least one BCU simulator to the BMU to be tested as an over-temperature value based on the test parameters;

step S342, the PC judges whether to promote the over-temperature protection based on the BMS test equipment and the feedback data of the BMU to be tested, if so, the step S343 is entered; if not, generating a test result of the abnormal overheat monitoring function;

step S343, the PC judges whether the time consumption for triggering the over-temperature protection is within the protection duration threshold, if so, a test result with normal over-temperature monitoring function is generated; if not, generating a test result of the over-temperature monitoring function abnormality.

In the step S30, the voltage equalizing monitoring function test specifically includes:

step S351, the PC sets a differential pressure value of at least two BCU simulators to the voltage output by the BMU to be tested based on the test parameters, and the differential pressure value exceeds a preset maximum allowable differential pressure;

step S352, the PC judges whether to promote non-equalizing protection based on feedback data of BMS test equipment and BMU to be tested, if yes, the step S353 is entered; if not, generating a test result of the monitoring function abnormality after the pressure equalizing;

step S353, the PC judges whether the time consumption for triggering the non-uniform voltage protection is within the protection time threshold, if yes, a test result with normal monitoring function is generated; if not, generating a test result of the voltage-sharing monitoring function abnormality.

And checking whether the BMU to be tested can trigger the corresponding protection action in the specified time or not through the protection duration threshold value, and compared with whether the corresponding protection action can be triggered by a single test or not, the accuracy of the BMU test is effectively improved.

In summary, the utility model has the advantages that:

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.

Claims

1. A BMU test device, characterized in that: the BMS testing device comprises BMS testing equipment, a communication bus tool, a communication board card, a PC and a wireless communication module; the BMS test equipment is provided with a plurality of BCU simulators for simulating voltage, current and temperature of the battery cells during charging and discharging;

2. The BMU test device according to claim 1, wherein: the wireless communication module is at least one of a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, a LORA communication module, a WIFI communication module, a Bluetooth communication module or a ZigBee communication module.