Detection tool and detection method of BMS board card
By designing a BMS board detection tool set including a cylinder and a detection probe set, the problem of difficulty in measuring and evaluating the quality of the BMS board in the prior art is solved, an efficient and low-cost detection process is achieved, and the safety and reliability of the battery management system is improved.
Patent Information
- Application Number
- CN202510018042.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-03-21
AI Technical Summary
The prior art is difficult to measure and evaluate the quality of BMS boards quickly and accurately, affecting the safety and reliability of the battery management system.
A BMS board detection tool is designed, including a base, bracket, board fixing fixture, touch display screen, cylinder and detection probe set. By issuing test instructions by the detection tool controller, the cylinder drive probe is used to detect, collect voltage, current, temperature and other data, and data processing and storage are carried out through the MCU and data acquisition interface.
It realizes fast and accurate detection of BMS boards, simplifies the operation process, reduces learning costs and production costs, and improves production efficiency.
Smart Images
Figure CN119667581A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a detection tool and a detection method for a BMS board. Background Art
[0002] The battery management system (BMS) is the link between the battery and the user. As an important component of the energy storage battery, it directly detects and manages the entire process of battery operation, including the battery charging and discharging process, SOC estimation, battery temperature, single cell voltage, balance between single cells, total voltage of the battery pack, working current, battery pack thermal balance management, battery status analysis and online alarm, battery fault diagnosis, etc. The battery management system (BMS) test equipment system plays a key role in ensuring the safe and reliable operation of the battery and optimizing battery performance, and functional testing is an important means to evaluate whether the BMS test equipment system can accurately and effectively realize its various predetermined functions. In order to ensure the quality of the BMS board, a set of test tools for quickly measuring and evaluating the quality of the BMS board is urgently needed. Summary of the invention
[0003] The invention provides a detection tool and a detection method for a BMS board.
[0004] The technical solution adopted by the present invention to solve the above technical problems is: A detection tool for a BMS board, comprising a base and a bracket arranged above the base, a board fixing fixture being arranged on the base, a touch screen being arranged on the right side of the base, a cylinder being arranged on the bracket, the cylinder comprising a driving rod, a through hole being arranged on the bracket for cooperating with the driving rod, the driving rod extending downward from the top of the bracket, a detection probe group pressure plate being arranged at the bottom end of the driving rod and being opposite to the board fixing fixture, a plurality of probes being arranged at the bottom of the detection probe group pressure plate, a power module, a detection tool controller, a voltmeter and an ammeter connected in sequence being arranged in the base, a communication interface connected to the detection tool controller being arranged at the rear of the base, and the detection tool controller comprising an MCU, a data acquisition interface and a touch screen.
[0005] A method for detecting a BMS board card, using a BMS board card detection tool to detect the BMS board card, comprising the following steps: S1. The detection tooling controller sends a test command, and the cylinder receives the test command to drive the probe to move downward; S2. The detection tool controller detects the test data to obtain the detection value corresponding to the test data. The test data includes voltage measurement function test, current measurement function test, temperature measurement function test, SOC estimation function test, SOH evaluation function test, communication function test, equalization function test and fault diagnosis and protection function test; S3, the test value meets the test conditions; S4, the voltmeter and the ammeter send the test results to the MCU, and the test data is transmitted to the external memory through the data acquisition interface; S5. The cylinder drives the probe to move upward.
[0006] Preferably, the voltage measurement function test uses a high-precision voltage source to simulate different voltage states of the battery, sets a series of different standard voltage values, and then measures these voltages through the BMS test equipment system, compares the measured values with the standard values, calculates the measurement errors, and tests the response capability of the BMS board at different voltage change rates to ensure that it can accurately track voltage changes in real time.
[0007] Preferably, the current measurement function test uses a programmable electronic load to simulate the charge and discharge current of the battery, sets different current values and charge and discharge modes, compares the measured value with the set value, and evaluates the accuracy of the current measurement. Attention should also be paid to the measurement accuracy of the BMS board under high and low current conditions, as well as its ability to respond quickly to current changes.
[0008] Preferably, the temperature measurement function test uses a thermostat or a temperature simulator to provide different temperature environments, places the temperature sensor at a specified position, and simulates the temperature changes of the battery in actual operation. The BMS test equipment system should be able to accurately measure the temperature and compare it with the reading of a standard thermometer.
[0009] Preferably, the SOC estimation function test is performed by performing charge and discharge experiments on the battery, recording the voltage, current and time data of the battery at different charge and discharge stages, using the SOC estimation algorithm of the BMS test equipment system to calculate the SOC value based on these data, and comparing the calculated SOC value with the real SOC value calculated by actual capacity to evaluate the accuracy of the SOC estimation.
[0010] Preferably, the SOH evaluation function test performs multiple charge and discharge cycle experiments on the battery, records the battery's capacity decay and internal resistance change data, compares the evaluation result with the SOH value obtained by professional battery testing equipment to verify its accuracy, and examines the BMS board's ability to evaluate SOH at different battery usage stages and under different environmental conditions, as well as its ability to warn of abnormal situations such as sudden battery failure.
[0011] Preferably, the communication function test enables the BMS to communicate with other devices or systems to achieve interaction of data transmission and control instructions. When testing the communication function, it is necessary to check whether the communication protocol between the BMS test equipment system and the external memory or other related devices complies with the standard, whether the communication connection is stable and reliable, send different types of data and instructions, and verify the accuracy, completeness and timeliness of the data.
[0012] Preferably, the balancing function test puts the single cells in the battery pack in different initial voltage states, starts the balancing function of the BMS board, observes the voltage changes of each single cell within a certain period of time, and evaluates whether the balancing effect is obvious and whether the balancing speed meets the requirements.
[0013] Preferably, the fault diagnosis and protection function test simulates various fault conditions, such as overcharging, over-discharging, short circuit, and overheating, to check whether the BMS test equipment system can quickly detect the fault and trigger the corresponding protection mechanism, verify the recovery function of the BMS board after the fault occurs, and ensure that it can resume normal operation after the fault is eliminated.
[0014] Compared with the prior art, the detection tooling of the BMS board of the present invention has a simple structure, low manufacturing cost, and simple operation. When using the tooling, first fix the tooling on the equipment, connect the communication line on the tooling to the equipment, and then place the BMS board on the board fixing fixture of the tooling. The probe is just pressed on the PIN pin of the BMS board, and then the test can begin. When the test is completed, take out the current BMS board, put in the next BMS board, and then the next test can be carried out. The detection method of the BMS board of the present invention is simple to operate, simplifies the learning cost of the staff, improves production efficiency, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the detection tooling of the BMS board card of the present invention.
[0016] Figure 2 The figure is a flow chart of the detection method of the BMS board of the present invention. DETAILED DESCRIPTION
[0017] The present invention is further described in detail below with reference to the accompanying drawings.
[0018] like Figure 1As shown, a BMS board detection tool comprises a base 1 and a bracket 2 arranged above the base 1, a board fixing fixture 3 is arranged on the base 1, a touch screen 4 is arranged on the right side of the base 1, a cylinder 5 is arranged on the bracket 2, and the cylinder 5 includes a driving rod 51. The bracket 2 is provided with a through hole that cooperates with the driving rod 51, so that the driving rod 51 extends downward from the top of the bracket 2, and the bottom end of the driving rod 51 is provided with a detection probe group pressing plate 6 opposite to the board fixing fixture 3, and a plurality of probes 61 are arranged at the bottom of the detection probe group pressing plate 6. The base 1 is provided with a power module, a detection tool controller, a voltmeter and an ammeter connected in sequence, and the rear of the base 1 is provided with a communication interface connected to the detection tool controller, and the detection tool controller includes an MCU, a data acquisition interface and a touch screen 4. In addition to collecting data, the detection tool controller can also simulate the data required by the BMS board, such as the cell voltage, temperature, etc., and can output the detection results and export the comprehensive detection data to an external storage device, such as a U disk / SD card.
[0019] Before the test, first connect the communication line to the corresponding data acquisition interface on the test equipment, manually place the BMS board on the fixture 3 of the tooling and fix it, then turn on the cylinder 5, drive the rod 51 downward to move the probe 61 downward and press it onto the PIN pin of the BMS board, then start the equipment test button to test, after the test is completed, the drive rod 51 of the cylinder 5 moves upward and drives the probe 61 away from the BMS board, take out the BMS board, and then put in another BMS board for testing.
[0020] like Figure 2 As shown, the detection method of the BMS board includes the following steps: S1, the detection tool controller sends a test instruction, and the cylinder 5 receives the test instruction and drives the probe 61 to move downward; S2. The detection tool controller detects the test data to obtain the detection value corresponding to the test data. The test data includes voltage measurement function test, current measurement function test, temperature measurement function test, SOC estimation function test, SOH evaluation function test, communication function test, equalization function test and fault diagnosis and protection function test; S3, the test value meets the test conditions; S4, the voltmeter and the ammeter send the test results to the MCU, and the test data is transmitted to the external memory through the data acquisition interface; S5, the cylinder 5 drives the probe 61 to move upward; Voltage measurement function test: In the test equipment system, a high-precision voltage source is required to simulate different voltage states of the battery. First, set a series of different standard voltage values, and then measure these voltages through the BMS test equipment system. Compare the measured values with the standard values and calculate the measurement error. The error should be within the specified accuracy range. For example, for common battery management systems, the voltage measurement error may be required to be controlled within ±0.5%. At the same time, the response ability of the BMS board at different voltage change rates must be tested to ensure that it can accurately track voltage changes in real time.
[0021] Current measurement function test: A programmable electronic load is used to simulate the battery charge and discharge current. Different current values and charge and discharge modes are set, such as constant current charge, constant current discharge, pulse charge and discharge, etc., and the current is measured through the BMS test equipment system. Similarly, the measured value is compared with the set value to evaluate the accuracy of the current measurement. In addition, attention should be paid to the measurement accuracy of the BMS board under high and low current conditions, as well as the ability to respond quickly to current changes, in order to meet the needs of various working conditions in actual applications.
[0022] Temperature measurement function test: Temperature has an important impact on the performance and life of the battery, so the temperature measurement function of the BMS board must be accurate and reliable. Use a constant temperature box or temperature simulator to provide different temperature environments, place the temperature sensor in the specified position, and simulate the temperature changes of the battery in actual work. The BMS test equipment system should be able to accurately measure the temperature and compare it with the reading of the standard thermometer. Different temperature ranges should be covered during the test, including normal temperature, high temperature and low temperature, and the linearity and stability of the temperature sensor should be examined. For some BMS boards with multiple temperature measurement points, it is also necessary to verify the consistency and accuracy between the various measurement points.
[0023] SOC estimation function test: State of charge (SOC) estimation is one of the core functions of BMS, and its accuracy directly affects the efficiency and safety of battery use. By performing charge and discharge experiments on the battery, record the voltage, current, time and other data of the battery at different charge and discharge stages. Then, use the SOC estimation algorithm of the BMS test equipment system to calculate the SOC value based on these data. Compare the calculated SOC value with the actual SOC value calculated by the actual capacity to evaluate the accuracy of the SOC estimation. Different charge and discharge strategies and operating conditions, such as constant current charge and discharge, dynamic operating condition simulation, etc., can be used to comprehensively test the accuracy and stability of the SOC estimation algorithm under various conditions. In addition, the error accumulation of the SOC estimation can be observed through long-term charge and discharge cycle experiments to verify its long-term reliability.
[0024] SOH evaluation function test: The health status (SOH) evaluation function is used to monitor the aging degree and remaining life of the battery. Through multiple charge and discharge cycle experiments on the battery, the battery capacity decay, internal resistance change and other data are recorded. The BMS test equipment system uses the corresponding algorithm to evaluate the battery's SOH based on these data. The evaluation results can be compared with the SOH value obtained by professional battery testing equipment to verify its accuracy. At the same time, the BMS board's ability to evaluate SOH at different battery use stages and under different environmental conditions, as well as its ability to warn of abnormal situations such as sudden battery failure, is examined.
[0025] Communication function test: BMS needs to communicate with other devices or systems to achieve data transmission and control command interaction. When testing the communication function, check whether the communication protocol between the BMS test equipment system and the external memory or other related devices meets the standard and whether the communication connection is stable and reliable. Send different types of data and instructions to verify the accuracy, completeness and timeliness of the data. At the same time, simulate communication interference and failure conditions such as data packet loss, delay, error, etc., check the fault tolerance and retransmission mechanism of the BMS test equipment system to ensure that it can still work normally in a complex communication environment.
[0026] Equalization function test: Due to differences in manufacturing processes and usage environments, the voltage of the cells in the battery pack may be inconsistent. The equalization function is to ensure that the voltage of each cell in the battery pack remains at a relatively consistent level, thereby improving the overall performance and life of the battery pack. When testing the equalization function, first put the cells in the battery pack in different initial voltage states. Then, start the equalization function of the BMS board and observe the changes in the voltage of each cell within a certain period of time. Evaluate whether the equalization effect is obvious and whether the equalization speed meets the requirements. At the same time, check whether the equalization process will cause additional energy loss or other adverse effects on the battery.
[0027] Fault diagnosis and protection function test: BMS should have the ability to diagnose battery faults in a timely and accurate manner and take corresponding protective measures. By simulating various fault conditions, such as overcharging, overdischarging, short circuit, overheating, etc., check whether the BMS test equipment system can quickly detect the fault and trigger the corresponding protection mechanism, such as cutting off the charging and discharging circuit, sounding an alarm, etc. At the same time, verify the recovery function of the BMS board after the fault occurs to ensure that it can resume normal work after the fault is eliminated. In addition, the BMS board's fault recording and reporting function should be checked to facilitate subsequent fault analysis and processing.
[0028] The functional testing of the BMS board inspection tooling covers many aspects, and a series of rigorous experiments and testing methods are required to comprehensively evaluate its performance. Only by ensuring that the various functions of the BMS test equipment system are accurate and reliable can we provide strong support for battery management and ensure the safe and efficient operation of the battery system.
[0029] The detection tooling of the BMS board of the present invention has a simple structure, low manufacturing cost, and simple operation. When using the tooling, first fix the tooling on the equipment, connect the communication line on the tooling with the equipment, and then place the BMS board on the board fixing fixture of the tooling, and the probe is pressed just on the PIN pin of the BMS board, and then the test can be started. When the test is completed, take out the current BMS board, put in the next BMS board, and then the next test can be carried out. The detection method of the BMS board of the present invention is simple to operate, simplifies the learning cost of the staff, improves production efficiency, and saves costs.
[0030] Finally, it should be noted that the above embodiments only illustrate the technical solutions of the present invention, rather than limiting it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A BMS board detection tool, characterized in that: The invention comprises a base (1) and a bracket (2) arranged above the base (1), wherein a board fixing fixture (3) is arranged on the base (1), a touch screen (4) is arranged on the right side of the base (1), a cylinder (5) is arranged on the bracket (2), and the cylinder (5) comprises a driving rod (51), a through hole matched with the driving rod (51) is arranged on the bracket (2), the driving rod (51) extends downward from the top of the bracket (2), a detection probe group pressing plate (6) opposite to the board fixing fixture (3) is arranged at the bottom end of the driving rod (51), and a plurality of probes (61) are arranged at the bottom of the detection probe group pressing plate (6), a power supply module, a detection tool controller, a voltmeter and an ammeter connected in sequence are arranged in the base (1), a communication interface connected to the detection tool controller is arranged at the rear of the base (1), and the detection tool controller comprises an MCU, a data acquisition interface and a touch screen (4).
2. A method for detecting a BMS board, using the BMS board detection tooling of claim 1 to detect the BMS board, characterized in that: The following steps are involved: S1, the detection tool controller sends a test instruction, and the cylinder (5) receives the test instruction and drives the probe (61) to move downward; S2. The detection tool controller detects the test data to obtain the detection value corresponding to the test data. The test data includes voltage measurement function test, current measurement function test, temperature measurement function test, SOC estimation function test, SOH evaluation function test, communication function test, equalization function test and fault diagnosis and protection function test; S3, the test value meets the test conditions; S4, the voltmeter and the ammeter send the test results to the MCU, and the test data is transmitted to the external memory through the data acquisition interface; S5. The cylinder (5) drives the probe (61) to move upward.
3. The detection method of the BMS board according to claim 2 is characterized in that: The voltage measurement function test uses a high-precision voltage source to simulate different voltage states of the battery, sets a series of different standard voltage values, and then measures these voltages through the BMS test equipment system, compares the measured values with the standard values, calculates the measurement error, and tests the response capability of the BMS board at different voltage change rates to ensure that it can accurately track voltage changes in real time.
4. The method for detecting a BMS board according to claim 2, characterized in that: The current measurement function test uses a programmable electronic load to simulate the charge and discharge current of the battery, sets different current values and charge and discharge modes, compares the measured value with the set value, and evaluates the accuracy of the current measurement. It is also necessary to pay attention to the measurement accuracy of the BMS board under high and low current conditions, as well as its ability to respond quickly to current changes.
5. The method for detecting the BMS board according to claim 2, characterized in that: The temperature measurement function test uses a constant temperature box or a temperature simulator to provide different temperature environments, places the temperature sensor at the specified position, and simulates the temperature changes of the battery in actual operation. The BMS test equipment system should be able to accurately measure the temperature and compare it with the reading of the standard thermometer.
6. The method for detecting a BMS board according to claim 2, characterized in that: The SOC estimation function test performs charge and discharge experiments on the battery, records the voltage, current and time data of the battery at different charge and discharge stages, calculates the SOC value based on these data using the SOC estimation algorithm of the BMS test equipment system, compares the calculated SOC value with the real SOC value calculated by actual capacity, and evaluates the accuracy of the SOC estimation.
7. The method for detecting a BMS board according to claim 2, characterized in that: The SOH evaluation function test performs multiple charge and discharge cycle experiments on the battery, records the battery's capacity decay and internal resistance change data, compares the evaluation results with the SOH value obtained by professional battery testing equipment to verify its accuracy, and examines the BMS board's ability to evaluate SOH at different battery usage stages and under different environmental conditions, as well as its ability to warn of abnormal situations such as sudden battery failure.
8. The method for detecting a BMS board according to claim 2, characterized in that: The communication function test enables the BMS to communicate with other devices or systems to achieve interaction of data transmission and control instructions. When testing the communication function, it is necessary to check whether the communication protocol between the BMS test equipment system and the external memory or other related devices meets the standards, whether the communication connection is stable and reliable, send different types of data and instructions, and verify the accuracy, completeness and timeliness of the data.
9. The method for detecting a BMS board according to claim 2, characterized in that: The balancing function test puts the single cells in the battery pack in different initial voltage states, starts the balancing function of the BMS board, observes the voltage changes of each single cell within a certain period of time, and evaluates whether the balancing effect is obvious and whether the balancing speed meets the requirements.
10. The method for detecting a BMS board according to claim 2, characterized in that: The fault diagnosis and protection function test simulates various fault conditions, such as overcharging, over-discharging, short circuit, and overheating, to check whether the BMS test equipment system can quickly detect the fault and trigger the corresponding protection mechanism, verify the recovery function of the BMS board after the fault occurs, and ensure that it can resume normal work after the fault is eliminated.