BMS battery pack management system detection device

Abstract

The utility model belongs to the technical field of battery application, and particularly relates to a BMS battery pack management system detection device. The BMS battery pack management system detection device comprises a BMS battery pack simulation module, a signal generation module, a test data acquisition module, a core processor module and an AI accelerator board. According to the BMS battery pack management system detection device of the utility model, modular design and application are adopted, so that a test environment can be simply and rapidly established, different detection requirements can be met, and rapid detection can be realized; according to the detection device of the BMS battery pack management system, the online AI accelerator board is adopted, AI test verification of the BMS management system is accelerated, and research and development time is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery application, and in particular relates to a BMS battery group management system detection device. Background Art

[0002] The new energy storage system is an important technology and basic equipment for building a new power system, an important support for achieving the goals of carbon peak and carbon neutrality, and an important field for promoting new domestic energy formats and seizing new international strategic heights. Among them, the battery pack is one of the core components of the energy storage system, and its safety and durability are important indicators for evaluating the energy storage system.

[0003] The component that ensures the safe use and stable performance of the battery module is the BMS management system in the battery module. The BMS system implements real-time monitoring of the performance of multiple cells in the battery module and detection of system insulation. When the electrical parameters of the cells in the module are unbalanced or there are safety hazards, the BMS system will use different strategies to make adjustments to ensure the normal operation of the system. At present, the way to implement BMS system detection is usually a complete set of customized systems on the market, which has limited detection functions and a long detection cycle. Summary of the invention

[0004] The utility model proposes a BMS battery management system detection device, which realizes modular design, can easily and quickly build a test environment, test and verify the functions of samples, and meet different detection requirements.

[0005] A BMS battery management system detection device, comprising:

[0006] BMS battery pack simulation module, signal generation module, test data acquisition module, core processor module, wherein the BMS battery pack simulation module, signal generation module, and test data acquisition module are connected via the core processor module;

[0007] The test data acquisition module is used to connect to the host computer to acquire test data;

[0008] The signal generating module is connected to the core processor to generate the pulse signal and PWM signal required for the test;

[0009] The BMS battery pack simulation module includes a quick-plug module control box, a battery simulation circuit module, a temperature thermal resistance module, and a relay circuit module. The quick-plug module control box has a quick-plug module interface. The battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are connected to the core processor module through the quick-plug module interface, and the battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are used to be connected to the BMS battery pack management system respectively.

[0010] Optionally, the test data acquisition module includes a UART communication circuit, a data storage device and a data simulator, wherein the UART communication circuit is used to communicate with a host computer to convey test instructions; the data storage device is used to store test data and test instructions; and the data simulator is used to generate test data according to test requirements.

[0011] Optionally, the BMS battery management system detection device also includes an AI acceleration board, which is connected to the data simulator and the core processor module, and the AI ​​acceleration board is used to accelerate the BMS management system AI test verification.

[0012] Optionally, the battery simulation circuit module includes a multi-channel battery simulator.

[0013] Optionally, the temperature thermal resistance module is a multi-channel programmable resistance card.

[0014] Optionally, the BMS battery management system detection device further includes a power drive circuit, which provides power for the BMS battery management system detection device.

[0015] Optionally, the BMS battery management system detection device also includes a voltage simulation circuit and a current simulation circuit, and the voltage simulation circuit and the current simulation circuit provide simulated voltage and simulated current for the BMS battery management system.

[0016] In summary, the BMS battery management system detection device described in this application has the following advantages:

[0017] 1. The BMS battery management system detection device described in the utility model adopts modular design and application. The test system hardware and software are based on the modular design concept. Users can choose according to their own needs. Deep matching of different scene requirements can easily and quickly build a test environment;

[0018] 2. The detection device of the BMS battery management system described in the utility model adopts an online AI acceleration board to accelerate the AI ​​test verification of the BMS management system, which greatly saves research and development time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1It is a schematic diagram of the planar structure of a BMS battery management system detection device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] A BMS battery management system detection device, such as Figure 1 As shown, including:

[0024] BMS battery pack simulation module 100, signal generating module 200, test data acquisition module 300, core processor module 400, AI acceleration board 500, power drive circuit 600, the BMS battery pack simulation module 100, signal generating module 200, test data acquisition module 300, AI acceleration board 500 are connected through the core processor module 400.

[0025] The test data acquisition module 100 includes a UART communication circuit, a data storage device and a data simulator. The UART communication circuit is used to communicate with the host computer and convey test instructions. The data storage device is used to store test data and test instructions. The function of the data simulator is to generate different test data according to test requirements: during routine tasks, it provides the electrical parameters required for testing the BMS system, and also provides training set data and verification set data to the AI ​​accelerator board 500.

[0026] The signal generating module 200 includes a signal generator, which generates different signals, mainly pulse signals and PWM signals, according to different test requirements.

[0027] The AI ​​accelerator board 500 is connected to the data simulator and the core processor module. The function of this module is that during the test phase, the AI ​​accelerator board divides the test data into a training set and a verification set according to the test requirements. The training set data simulates adding different noise data according to different test requirements to train the BMS management system with AI learning function. After the training is completed, it is verified by the verification set data. Compared with the existing technology that trains and tests the BMS management system with AI learning function based on experimental data after the test is completed, it greatly saves R&D time.

[0028] The power driving circuit 600 provides power for the BMS battery management system detection device.

[0029] The BMS battery pack simulation module 300 includes a quick-plug module control box, a battery simulation circuit module, a temperature thermal resistance module, and a relay circuit module. The quick-plug module control box has a quick-plug module interface. The battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are connected to the core processor module through the quick-plug module interface, and the battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are used to be connected to the BMS battery pack management system respectively.

[0030] The BMS battery management system detection device described in this embodiment is connected to the corresponding interface of the BMS battery management system: the BMS battery simulation module 100 is connected to the total pressure port of the BMS management system under test, the temperature thermal resistance module is connected to the temperature sampling port of the BMS management system, and the signal generating module 200 is connected to the signal sampling port of the BMS management system.

[0031] In this embodiment, the temperature resistance module is a multi-channel programmable resistance card.

[0032] Programmable multi-channel resistor cards can be designed for different applications with flexible design architecture, allowing the card to support 12-bit, 16-bit or 24-bit resolution, as well as larger resistance values. Programmable multi-channel resistor cards are used as system test simulations, allowing users to verify system response during the design phase or production testing.

[0033] In an embodiment, the battery simulation circuit module includes a multi-channel battery simulator.

[0034] The multi-channel battery simulator is a low-power, multi-channel, high-precision programmable battery simulator with a dual-quadrant design. The current can be charged and discharged, and the voltage accuracy can reach up to 0.6mV. It supports μA-level current measurement. A single machine has up to 24 channels, and the channels are isolated from each other, which facilitates the use of multiple channels in series. It can meet the testing needs of BMS in multi-channel, multi-parameter, and complex testing environments.

[0035] 1. Insulation resistance test

[0036] Insulation resistance test is one of the important functions of power energy storage BMS. Factors such as changes in the operating environment and aging of components can cause the insulation performance of the energy storage battery pack to decline, causing the system shell potential to rise, affecting the normal operation of the battery pack, and may also cause heat accumulation in the leakage circuit, causing safety hazards. This embodiment uses the battery simulation circuit module to simulate the insulation resistance data for testing.

[0037] Usually, a programmable insulation resistance box is used to test the insulation detection function of the BMS. When selecting a programmable insulation resistance box, four parameters are generally considered: withstand voltage range, resistance range, adjustment resolution, and resistance accuracy.

[0038] Using a programmable insulation resistance box to test the simulated insulation resistance data of the battery simulation circuit module in this embodiment has the following advantages:

[0039] High withstand voltage: The maximum withstand voltage is 2000V, which meets the development trend of 1500V DC voltage level of power storage power station;

[0040] Wide range: The resistance range is 50Ω~61MΩ, which is better than the insulation resistance array test requirements required for a long time and meets the test requirements of energy storage BMS with various specifications;

[0041] High precision: The programming accuracy is up to ±1%, meeting the market demand for testing different voltage levels and different insulation fault levels;

[0042] High safety: Double guarantee of resistance overcurrent protection and safety voltage protection, safe testing is more assured.

[0043] 2. Temperature test

[0044] Temperature is an important factor affecting the working performance of power storage batteries. If the battery temperature is too high, the electrolyte will evaporate and lose water, which will accelerate the chemical reaction inside the battery, affecting the battery life and performance, and even causing overheating, short circuit and other phenomena. If the battery temperature is too low, the internal chemical reaction will slow down, resulting in a slower battery charging speed, and the internal electrolyte will become viscous, reducing the output power and capacity. This embodiment uses a temperature thermal resistance module to simulate the battery pack temperature data for testing.

[0045] Regarding BMS temperature collection, the current market has clearer requirements on the collection range, collection accuracy, and number of collection channels. Therefore, higher simulation accuracy requirements are placed on temperature simulation devices. The temperature simulation accuracy should be better than 0.3°C, and the accuracy of the corresponding programmable resistor should be better than 0.4%.

[0046] This embodiment uses a programmable resistor card to test the temperature acquisition function of the BMS. For the selection of the temperature thermal resistance module, four parameters are generally considered: the number of channels, the resistance range, the resistance error, and the adjustment fineness.

[0047] Using a programmable resistor card to test the temperature data of the battery pack simulated by the temperature resistance module in this embodiment has the following advantages:

[0048] Safe and reliable: built-in short circuit, overvoltage and other protection circuits to ensure the safety of the object under test and the test system;

[0049] Good consistency: parameters can be set and the test can be synchronized with one button to ensure the consistency of each channel test;

[0050] High efficiency: CAN / LAN / RS232 communication interface is standard, supporting host computer software communication control, effectively improving test efficiency;

[0051] High precision: resistance accuracy 0.1%, resolution up to 1Q.

[0052] The voltage simulation circuit and the current simulation circuit provide simulated voltage and simulated current for the BMS battery pack management system.

[0053] 3. Voltage test

[0054] The data acquisition part of this embodiment specifies the BMS single-cell voltage acquisition range and error requirements, and adds relevant test methods. In addition, 1500V has become the mainstream voltage level of energy storage power stations. Therefore, this puts forward higher requirements on the output voltage accuracy of the single-cell battery simulation device and the output channel withstand voltage to ground. The accuracy of the battery simulation device should be better than 1mV, and the output channel withstand voltage to ground should be greater than 1500V.

[0055] 4. Current test

[0056] In order to reduce charge and discharge losses and improve system efficiency, mainstream energy storage BMSs already support active / passive balancing, and the maximum active balancing current can reach 5 A. Therefore, this embodiment stipulates that the energy storage BMS should support "active balancing and passive balancing"; at the same time, for the balancing test, it should support at least 10mV step value for adjustment testing.

[0057] The core processor module 400 includes an MCU microprocessor, which is responsible for coordinating the normal operation of the above-mentioned related functional modules and executing related functions according to the test logic.

[0058] The BMS battery management system detection device also includes a voltage simulation circuit and a current simulation circuit, and the voltage simulation circuit and the current simulation circuit are used to provide simulated voltage and simulated current for the BMS battery management system.

[0059] In summary, the utility model introduces a BMS battery management system detection device, which realizes the test of battery insulation resistance, temperature, voltage and current. This device has a high-precision and highly integrated design, with the core processor module 400 as the center, and the single cell voltage accuracy can reach up to 0.1mV, which can ensure the test accuracy and effectively save the test space; it realizes modular design, and the test system hardware and software are based on the modular design concept. Users can choose according to their own needs, and deeply match the needs of different scenarios.

[0060] Finally, it should be noted that any modification or equivalent replacement of part or all of the technical features based on the device structure of this patent and the technical solution of the described embodiment, which does not deviate from the essence of the corresponding technical solution of this patent, belongs to the patent scope of the device structure of this utility model and the described implementation scheme.

Claims

1. A BMS battery management system detection device, characterized in that: include: BMS battery pack simulation module, signal generation module, test data acquisition module, core processor module, wherein the BMS battery pack simulation module, signal generation module, and test data acquisition module are connected via the core processor module; The test data acquisition module is used to connect to the host computer to acquire test data; The signal generating module is connected to the core processor to generate the pulse signal and PWM signal required for the test; The BMS battery pack simulation module includes a quick-plug module control box, a battery simulation circuit module, a temperature thermal resistance module, and a relay circuit module. The quick-plug module control box has a quick-plug module interface. The battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are connected to the core processor module through the quick-plug module interface, and the battery simulation circuit module, the temperature thermal resistance module, and the relay circuit module are used to be connected to the BMS battery pack management system respectively.

2. The BMS battery management system detection device according to claim 1, characterized in that: The test data acquisition module includes a UART communication circuit, a data storage device and a data simulator. The UART communication circuit is used to communicate with the host computer to convey test instructions; the data storage device is used to store test data and test instructions; and the data simulator is used to generate test data according to test requirements.

3. The BMS battery management system detection device according to claim 1, characterized in that: It also includes an AI acceleration board, which is connected to the data simulator and the core processor module, and uses the AI ​​acceleration board to accelerate the AI ​​test verification of the BMS management system.

4. The BMS battery management system detection device according to claim 1, characterized in that: The battery simulation circuit module includes a multi-channel battery simulator.

5. The BMS battery management system detection device according to claim 1, characterized in that: The temperature thermal resistance module is a multi-channel programmable resistance card.

6. The BMS battery management system detection device according to claim 1, characterized in that: It also includes a power drive circuit, which provides power for the BMS battery management system detection device.

7. The BMS battery management system detection device according to claim 1, characterized in that: It also includes a voltage simulation circuit and a current simulation circuit, which provide simulated voltage and simulated current for the BMS battery management system.

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