Testing device for battery management system

Abstract

The utility model provides a testing device for a battery management system. The testing device comprises a power supply module, a data acquisition module, a communication module and a control module, the power supply module is provided with a plurality of output channels, and one output channel is configured to be connected with one to-be-tested battery management system; the data acquisition module is connected with the output channel and is configured to obtain an output parameter of the output channel; the communication module is in communication connection with the battery management system and is used for acquiring acquisition parameters of the battery management system, and the acquisition parameters comprise parameters acquired by the battery management system from the output channel; the control module is connected with the data acquisition module and the communication module, and is used for obtaining the output parameters and the acquisition parameters, and determining the precision of the battery management system according to the output parameters and the acquisition parameters. The power supply module is provided with a plurality of output channels, and one output channel can be connected with one to-be-tested battery management system, so that a plurality of battery management systems can be tested at the same time, and the test efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more specifically to a testing device for a battery management system. Background Technology

[0002] The performance and reliability of the Battery Management System (BMS) within a battery pack are crucial for the stable operation of the battery pack. Typically, the BMS needs to be tested to obtain relevant data, which serves as a basis for evaluating its performance and reliability.

[0003] In related technologies, BMS testing devices can only test one BMS at a time. When testing multiple BMS, a lot of time and manpower are required, resulting in low testing efficiency.

[0004] Therefore, it is urgent to solve the above-mentioned technical problems. Utility Model Content

[0005] The embodiments of this application provide a testing apparatus for battery management systems, which can improve the technical problem that the current testing apparatus for battery management systems can only test one battery management system at a time, and that testing multiple battery management systems requires a lot of time and manpower, resulting in low testing efficiency.

[0006] An embodiment of this application provides a testing apparatus for a battery management system, the testing apparatus for the battery management system comprising:

[0007] A power module having multiple output channels, one of which is configured to connect to a battery management system under test;

[0008] A data acquisition module is connected to the output channel, and the data acquisition module is configured to acquire the output parameters of the output channel.

[0009] A communication module, which is communicatively connected to the battery management system, is used to acquire the acquisition parameters of the battery management system, including parameters acquired by the battery management system from the output channel;

[0010] The control module, which is connected to both the data acquisition module and the communication module, is used to acquire the output parameters and the acquisition parameters, and to determine the accuracy of the battery management system based on the output parameters and the acquisition parameters.

[0011] In some embodiments, the power module includes a first power supply and a second power supply, wherein the output channel of the first power supply is connected to the input terminal of the battery management system, and the output channel of the second power supply is connected to the output terminal of the battery management system.

[0012] In some embodiments, both the first power supply and the second power supply are bidirectional DC power supplies.

[0013] In some embodiments, an output channel includes a plurality of sub-channels connected in series, wherein the positive terminal of the sub-channels connected in series is connected to the positive terminal of the input terminal, and the negative terminal of the sub-channels connected in series is connected to the negative terminal of the input terminal.

[0014] In some embodiments, the data acquisition module is connected to each of the sub-channels.

[0015] In some embodiments, the control module is connected to the power module, and the control module is configured to output a control signal to the power module to adjust the output parameters of the power module.

[0016] In some embodiments, the data acquisition module is connected to the temperature sensor of the battery management system, and the data acquisition module is configured to acquire the temperature parameters of the temperature sensor, the acquired parameters including the temperature parameters acquired by the battery management system from the temperature sensor.

[0017] In some embodiments, the testing apparatus for the battery management system includes a temperature chamber, and the battery management system is disposed inside the temperature chamber.

[0018] In some embodiments, the control module is connected to the incubator and is configured to adjust the temperature of the incubator.

[0019] In some embodiments, the output parameters include voltage and current, and the acquisition parameters include voltage, current, and temperature.

[0020] The beneficial effects of the embodiments of this application are as follows:

[0021] In the embodiments of this application, by setting multiple output channels for the power module, one output channel can be connected to a battery management system under test, enabling simultaneous testing of multiple battery management systems, improving testing efficiency, and thus addressing the technical problem of low testing efficiency in battery management system testing devices. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of a test device for a battery management system provided in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] Test apparatus 1 for battery management system;

[0026] Power module 10, output channel 11, sub-channel 111, first power supply 12, second power supply 13;

[0027] Data acquisition module 20;

[0028] Communication module 30;

[0029] Control module 40;

[0030] Battery management system 50, temperature sensor 51;

[0031] Incubator 60°C. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0033] like Figure 1 As shown, an embodiment of this application provides a testing device 1 for a battery management system 50. The testing device 1 for the battery management system 50 includes a power module 10, a data acquisition module 20, a communication module 30, and a control module 40. The power module 10 has multiple output channels 11, and one output channel 11 is configured to be connected to a battery management system 50 to be tested. The data acquisition module 20 is connected to the output channel 11 and is configured to acquire the output parameters of the output channel 11. The communication module 30 is communicatively connected to the battery management system 50 and is used to acquire the acquired parameters of the battery management system 50, including the parameters acquired by the battery management system 50 from the output channel 11. The control module 40 is connected to both the data acquisition module 20 and the communication module 30 and is used to acquire the output parameters and the acquired parameters, and determine the accuracy of the battery management system 50 based on the output parameters and the acquired parameters.

[0034] The Battery Management System 50 can be applied to batteries to monitor and manage their charging and discharging, ensuring safe operation and extending battery life. The Battery Management System 50 can monitor the battery's operating status in real time, including parameters such as voltage, temperature, current, and capacity. By monitoring these parameters, it can promptly detect abnormal battery conditions, such as overcharging, over-discharging, and overheating, ensuring safe battery operation. The Battery Management System 50 can also estimate the battery's remaining charge (SOC) and state of health (SOH) based on its operating status and historical data. Estimating SOC and SOH helps users understand the battery's remaining usage time and lifespan, enabling timely maintenance and replacement to ensure the normal operation of equipment.

[0035] The test apparatus 1 for the battery management system 50 can be used to test the battery management system 50 to evaluate its performance and reliability. For example, the test apparatus 1 can test whether the parameters such as voltage, temperature, and current collected by the battery management system 50 are accurate, and whether the SOC value obtained by the battery management system 50 is accurate.

[0036] The power module 10 has multiple output channels 11, and each output channel 11 is connected to a battery management system 50 under test. This configuration allows the power module 10 to be connected to multiple battery management systems 50 simultaneously, facilitating simultaneous testing of multiple battery management systems 50 and improving testing efficiency.

[0037] like Figure 1 As shown, in some embodiments, the power module 10 can be a multi-channel DC power supply, and the number of output channels 11 can match the number of battery management systems 50. Each battery management system 50 is connected to one output channel 11.

[0038] It should be noted that the number of output channels 11 of the power module 10 can be greater than the number of battery management system 50 under test. In this case, the extra output channels 11 can be in a non-working state.

[0039] The data acquisition module 20 is connected to the output channel 11 of the battery management system 50, and the data acquisition module 20 can acquire data. For example, the data acquisition module 20 can acquire parameters such as voltage and current output from the output channel 11.

[0040] The communication module 30 is communicatively connected to the battery management system 50, and can communicate with the battery management system 50. For example, the communication module 30 can obtain the acquired parameters from the battery management system 50. The acquired parameters may include parameters such as voltage and current of the output channel 11 acquired by the battery management system 50.

[0041] Optionally, the communication module 30 may use the CAN FD bus protocol for communication, but is not limited to this.

[0042] The control module 40 is connected to the communication module 30, and the control module 40 can obtain the collected parameters of the battery management system 50 from the communication module 30.

[0043] The control module 40 is also connected to the data acquisition module 20, and the control module 40 can acquire the output parameters of the output channel 11 acquired by the data acquisition module 20.

[0044] The control module 40 can process the output parameters and the acquired parameters to evaluate the performance of the battery management system 50. For example, the control module 40 can compare the voltage in the output parameters with the voltage in the acquired parameters to evaluate the accuracy of the voltage acquisition function of the battery management system 50. The control module 40 can compare the current in the output parameters with the current in the acquired parameters to evaluate the accuracy of the current acquisition function of the battery management system 50.

[0045] Optionally, in some embodiments, the control module 40 can also perform ampere-hour integration calculations on the collected voltage, current, and other data to calculate the SOC value. The control module 40 compares the SOC value it calculates with the SOC value obtained from the battery management system 50 to evaluate the accuracy of the SOC value of the battery management system 50.

[0046] like Figure 1 As shown, in some embodiments, the power module 10 includes a first power supply 12 and a second power supply 13. The output channel 11 of the first power supply 12 is connected to the input terminal of the battery management system 50, and the output channel 11 of the second power supply 13 is connected to the output terminal of the battery management system 50.

[0047] The first power supply 12 and the second power supply 13 can be the same type of power supply. For example, both the first power supply 12 and the second power supply 13 are multi-channel DC power supplies. The first power supply 12 can be connected to the input terminal of the battery management system 50, and the second power supply 13 can be connected to the output terminal of the battery management system 50. The input terminal can be B+ and B- of the battery management system 50, and the output terminal can be P+ and P- of the battery management system 50.

[0048] Specifically, such as Figure 1 As shown, the first power supply 12 can be connected to B+ and B- of the battery management system 50, and the second power supply 13 can be connected to P+ and P- of the battery management system 50.

[0049] Optionally, in some embodiments, the first power supply 12 and the second power supply 13 can both be multi-channel bidirectional DC power supplies. When it is necessary to test the performance of the battery management system 50 under discharge conditions, the first power supply 12 can be used as the power source and the second power supply 13 can be used as the load; when it is necessary to test the performance of the battery management system 50 under charging conditions, the first power supply 12 can be used as the load and the second power supply 13 can be used as the power source.

[0050] In some embodiments, such as Figure 1 As shown, an output channel 11 includes multiple sub-channels 111 connected in series. The positive terminal of the sub-channels 111 connected in series is connected to the positive terminal of the input terminal, and the negative terminal of the sub-channels 111 connected in series is connected to the negative terminal of the input terminal.

[0051] An output channel 11 may include multiple sub-channels 111, which can be connected in series to output a larger voltage. Alternatively, multiple sub-channels 111 can be connected in parallel to output a larger current. Alternatively, multiple sub-channels 111 may include both series and parallel connections to output corresponding voltages and currents. With these settings, not only can multiple battery management systems 50 under test be tested simultaneously, but the output voltage and current of the power module 10 can also be adjusted according to testing needs, expanding the applicability of the power module 10 and making it compatible with testing multiple different models of battery management systems 50.

[0052] For example, the output channel 11 of the first power supply 12 may include a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel. After the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel of the first power supply 12 are connected in series, the negative terminal of the first sub-channel and the positive terminal of the fourth sub-channel are left open, so that the negative terminal of the first sub-channel of the first power supply 12 is connected to B- of the battery management system 50, and the positive terminal of the fourth sub-channel of the first power supply 12 is connected to B+ of the battery management system 50.

[0053] The output channel 11 of the second power supply 13 may include a first sub-channel, a second sub-channel, a third sub-channel, and a fourth sub-channel. After the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel of the second power supply 13 are connected in series, the negative terminal of the first sub-channel and the positive terminal of the fourth sub-channel are left open. The negative terminal of the first sub-channel of the second power supply 13 is connected to p- of the battery management system 50, and the positive terminal of the fourth sub-channel of the second power supply 13 is connected to p+ of the battery management system 50.

[0054] The connection methods for the remaining battery management systems 50 can refer to the above embodiments.

[0055] Alternatively, in some embodiments, such as Figure 1As shown, the battery management system 50 can collect the voltage and current of the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel. The battery management system 50 can also collect the total voltage and total current of the four sub-channels 111.

[0056] In some embodiments, such as Figure 1 As shown, the data acquisition module 20 is connected to each sub-channel 111.

[0057] It should be noted that when the battery management system 50 collects the voltage and current of the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel, the data acquisition module 20 can also correspondingly collect the voltage and current of the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel. The control module 40 can compare the voltage of the first sub-channel collected by the battery management system 50 with the voltage of the first sub-channel collected by the data acquisition module 20 to evaluate the accuracy of the battery management system 50's voltage acquisition function for the first sub-channel.

[0058] Similarly, the control module 40 can compare the voltage of the second sub-channel acquired by the battery management system 50 with the voltage of the second sub-channel acquired by the data acquisition module 20 to evaluate the accuracy of the battery management system 50's voltage acquisition function for the second sub-channel.

[0059] The control module 40 can compare the voltage of the third sub-channel acquired by the battery management system 50 with the voltage of the third sub-channel acquired by the data acquisition module 20 to evaluate the accuracy of the voltage acquisition function of the battery management system 50 for the third sub-channel.

[0060] The control module 40 can compare the voltage of the fourth sub-channel acquired by the battery management system 50 with the voltage of the fourth sub-channel acquired by the data acquisition module 20 to evaluate the accuracy of the voltage acquisition function of the battery management system 50 for the fourth sub-channel.

[0061] In some embodiments, such as Figure 1 As shown, the data acquisition module 20 can acquire the total voltage and total current of four sub-channels 111: the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel. The control module 40 compares the total voltage and total current acquired by the data acquisition module 20 with the total voltage and total current acquired by the battery management system 50 to evaluate the accuracy of the battery management system 50's acquisition function for total voltage and total current.

[0062] In some embodiments, the control module 40 is connected to the power module 10, and the control module 40 is configured to output control signals to the power module 10 to adjust the output parameters of the power module 10. For example, the control module 40 and the power module 10 can be connected via an RS485 line, but are not limited thereto.

[0063] To simulate the complex operating conditions of the battery management system 50 in actual use and to more comprehensively evaluate its performance, a control module 40 can be connected to the power module 10. The control module 40 can adjust the output parameters of the power module 10 to conform to the complex operating conditions in actual use. For example, the power module 10 can be placed in any one or more of the following conditions: running, stopped, charging, shutdown, and ready.

[0064] When the power module 10 is under multiple operating conditions, these conditions can be tested sequentially in a loop. For example, the power module 10 can be tested in a loop according to the operating conditions, shutdown conditions, charging conditions, shutdown conditions, operating conditions, and preparation conditions. This better reflects the complex operating conditions of the battery management system 50 in actual use and facilitates a more comprehensive evaluation of the power management system's performance.

[0065] Various operating conditions can be set according to actual needs. For example, in the running condition, power module 10 outputs voltage and current. In the shutdown condition, power module 10 outputs low voltage and low current. In the stop condition, power module 10 does not output voltage and current. In the preparation condition, power module 10 changes from not outputting voltage and current to outputting voltage and current.

[0066] In some embodiments, such as Figure 1 As shown, the data acquisition module 20 is connected to the temperature sensor 51 of the battery management system 50. The data acquisition module 20 is configured to acquire the temperature parameters of the temperature sensor 51. The acquired parameters include the temperature parameters acquired by the battery management system 50 from the temperature sensor 51.

[0067] The temperature sensor 51 can be a negative temperature coefficient thermistor (NTC resistor), but is not limited to this.

[0068] The battery management system 50 acquires temperature parameters through the temperature sensor 51. The data acquisition module 20 is connected to the temperature sensor 51 and acquires temperature parameters from the temperature sensor 51. The control module 40 can compare the temperature parameters acquired by the battery management system 50 with the temperature parameters acquired by the data acquisition module 20 to evaluate the accuracy of the battery management system 50's temperature parameter acquisition function.

[0069] In some embodiments, such as Figure 1 As shown, the test device 1 for the battery management system 50 includes a temperature chamber 60, and the battery management system 50 is disposed inside the temperature chamber 60.

[0070] The temperature chamber 60 can adjust the ambient temperature of the battery management system 50 to simulate the operating conditions of the battery management system 50 under different temperatures in actual use, and further comprehensively evaluate the performance of the battery management system 50.

[0071] In some embodiments, such as Figure 1 As shown, the control module 40 is connected to the temperature chamber 60, and the control module 40 is configured to adjust the temperature of the temperature chamber 60.

[0072] The control module 40 can adjust the temperature of the temperature chamber 60 according to the operating conditions. The control module 40 can compare the temperature of the temperature chamber 60, the temperature collected by the data acquisition module 20, and the temperature collected by the battery management system 50 to evaluate the accuracy of the battery management system 50's temperature parameter acquisition function.

[0073] In some embodiments, the control module 40 determines the accuracy of the battery management system 50 based on the output parameters and the acquired parameters. The accuracy of the battery management system 50 can be the accuracy of the acquired voltage, current, temperature, SOC value, etc.

[0074] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A testing device (1) for a battery management system, characterized in that, The application relates to a test device (1) for testing a battery management system (50), comprising: a power supply module (10) having a plurality of output channels (11), one of which is configured to be connected to one battery management system (50) to be tested; a data acquisition module (20) connected to the output channels (11) and configured to acquire output parameters of the output channels (11); a communication module (30) connected in communication with the battery management system (50) and configured to acquire acquisition parameters of the battery management system (50), the acquisition parameters including parameters acquired by the battery management system (50) from the output channels (11); and a control module (40) connected to the data acquisition module (20) and the communication module (30) and configured to acquire the output parameters and the acquisition parameters and determine the precision of the battery management system (50) according to the output parameters and the acquisition parameters. The power supply module (10) comprises a first power supply (12) and a second power supply (13), the output channels (11) of the first power supply (12) are connected to input ends of the battery management system (50), and the output channels (11) of the second power supply (13) are connected to output ends of the battery management system (50). The first power supply (12) and the second power supply (13) are both bidirectional direct-current power supplies. One output channel (11) comprises a plurality of sub-channels (111) connected in series, the positive poles of the sub-channels (111) connected in series are connected to positive poles in the input ends, and the negative poles of the sub-channels (111) connected in series are connected to negative poles in the input ends. The data acquisition module (20) is connected to each sub-channel (111).

2. The test device (1) according to claim 1, characterized in that The control module (40) is connected to the power supply module (10), and the control module (40) is configured to output a control signal to the power supply module (10) to adjust the output parameters of the power supply module (10).

3. The test device (1) according to claim 2, characterized in that The data acquisition module (20) is connected to a temperature sensor (51) of the battery management system (50), and the data acquisition module (20) is configured to acquire a temperature parameter of the temperature sensor (51), and the acquisition parameters include the temperature parameter acquired by the battery management system (50) from the temperature sensor (51).

4. The test device (1) according to claim 2, characterized in that The test device (1) comprises a temperature box (60), and the battery management system (50) is arranged in the temperature box (60).

5. The test device (1) according to claim 4, characterized in that The control module (40) is connected to the temperature box (60), and the control module (40) is configured to adjust the temperature of the temperature box (60).

6. The test device (1) according to any one of claims 1 to 5, characterized in that The output parameters include voltage and current, and the acquisition parameters include voltage, current and temperature.

7. The test device (1) according to claim 6, characterized in that ​ 8. The test device (1) according to claim 7, characterized in that ​ 9. The testing device (1) according to claim 8, characterized in that ​ 10. The test device (1) according to claim 7, characterized in that ​

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