EMC radiation immunity test system of BMS

Abstract

The utility model discloses an EMC radiation immunity test system for a BMS, and relates to the technical field of electromagnetic compatibility test, and the system comprises a to-be-tested BMS placement platform, a cell simulator, a power supply, an artificial network, an antenna, a radio frequency generator, and an upper computer. Wherein the to-be-tested BMS placement platform, the cell simulator, the power supply, the artificial network and the antenna are all arranged in the EMC darkroom; the radio frequency generator and the upper computer are arranged outside the EMC darkroom; the to-be-tested BMS placing platform is used for placing a to-be-tested BMS, and the to-be-tested BMS comprises a BMU, a CMU and a relay; the signal acquisition end of the CMU is connected with the cell simulator; the BMU is connected with the control end of the relay, and meanwhile, the BMU is also in communication connection with the CMU and the upper computer; the output end of the power supply is connected to the power supply end of the BMU through an artificial network, and the artificial network is used for filtering clutters in output signals of the power supply; the output end of the radio frequency generator is connected to the antenna through a cable. The reliability of the test result is improved.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic compatibility testing technology, and in particular to an EMC radiation immunity testing system for a BMS. Background Art

[0002] EMC (Electromagnetic Compatibility) radiation immunity testing is a test method that evaluates the interference resistance of equipment / systems in electromagnetic radiation environments. A BMS (Battery Management System) is a device used to safely monitor and effectively manage battery modules to improve battery efficiency. It plays a key role in electric vehicles and renewable energy storage systems.

[0003] The BMS is mostly integrated inside the battery pack. In the existing technology, the EMC radiation immunity test of the BMS mostly relies on the actual battery pack to build a test system. However, the battery pack structure and the position of the BMS inside the battery pack will affect the EMC radiation immunity capability of the BMS, making it difficult to ensure the reliability of the test results. Utility Model Content

[0004] In view of the above problems, this application provides an EMC radiation immunity test system for BMS to improve the reliability of test results. The specific solution is as follows:

[0005] The present application provides an EMC radiation immunity test system for a BMS, comprising: a BMS placement platform to be tested, a battery cell simulator, a power supply, an artificial network, an antenna, a radio frequency generator, and a host computer;

[0006] The BMS placement platform, cell simulator, power supply, artificial network, and antenna are all placed inside the EMC chamber; the RF generator and host computer are placed outside the chamber.

[0007] The BMS to be tested placement platform is used to place the BMS to be tested, which includes the BMU, CMU and relays;

[0008] The signal acquisition terminal of the CMU is connected to the battery cell simulator;

[0009] The BMU is connected to the control terminal of the relay, and is also connected to the CMU and the host computer for communication;

[0010] The output end of the power supply is connected to the power supply end of the BMU through an artificial network. The artificial network is used to filter out noise in the power supply output signal.

[0011] The output of the RF generator is connected to the antenna via a cable.

[0012] In a possible implementation, the EMC radiation immunity test system of the BMS further includes: a shielding box; and a battery cell simulator is placed inside the shielding box.

[0013] In one possible implementation, the cable is a double-shielded coaxial cable.

[0014] In a possible implementation, the BMU and the host computer are connected to each other via a CAN link.

[0015] In one possible implementation, all lines connected to the BMU are bundled into a wire harness;

[0016] The wiring harness is placed along a straight line on a low relative dielectric constant support at a first preset distance above a ground plane of the EMC chamber.

[0017] In a possible implementation, the dielectric constant of the low relative dielectric constant support is less than or equal to 1.4.

[0018] In one possible implementation, the platform for placing the BMS to be tested includes a mobile platform;

[0019] The mobile platform is used to alternately move the BMU and the CMU to a position at a second preset distance from the antenna.

[0020] In one possible implementation, the mobile platform includes: a motor, an actuator, a storage platform, and a motor controller;

[0021] Among them, the storage platform is connected to the end of the actuator, and the motor controller is connected to the host computer and the motor;

[0022] The motor controller is used to drive the motor to rotate under the control of the host computer, and the rotation of the motor drives the actuator to move so that the BMU and CMU placed on the storage table are alternately moved to a position at a second preset distance from the antenna.

[0023] In a possible implementation, the radio frequency generator is connected to a host computer and is configured to adjust an output signal under the control of the host computer.

[0024] In a possible implementation, the battery cell simulator is obtained by simulating a lithium-ion battery.

[0025] With the help of the above technical solution, the EMC radiation immunity test system of the BMS provided in this application uses BMU, CMU, relays and battery cell simulators to form a whole to simulate the battery pack, instead of the actual battery pack to participate in the test; in the test system, since there is no battery pack entity and the relative position of the BMS is fixed, the difference in test results caused by the same BMS but different battery pack structure and / or position of the BMS in the battery pack is avoided, and the test results are highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the structure of an EMC radiation immunity test system for a BMS provided in this application;

[0028] Figure 2 A flow chart of the EMC radiation immunity test method for a BMS provided in this application;

[0029] Figure 3 A schematic diagram of the structure of another BMS EMC radiation immunity test system provided in this application;

[0030] Figure 4 A schematic diagram of the structure of a mobile platform provided in this application;

[0031] Figure 5 A schematic diagram of the structure of another mobile platform provided by this application;

[0032] Figure 6 A schematic diagram of the structure of another BMS EMC radiation immunity test system provided in this application;

[0033] Figure 7 A schematic diagram of the structure of another BMS EMC radiation immunity test system provided in this application;

[0034] Figure 8 A schematic diagram of the structure of a host computer provided in this application.

[0035] Reference numerals:

[0036] 1-BMU; 2-Ground plane; 3-Low relative dielectric constant support; 4-Wiring harness; 5-Main positive relay; 6-Main negative relay; 7-CMU; 8-Artificial network; 9-Power supply; 10-Cell simulator; 11-Shielding box; 12-RF generator; 13-Bulkhead connector; 14-Cable; 15-Antenna; 16-EMC chamber; 17-Host computer; 18-Desktop; 19-Base; 20-Hinge; 110-Communication interface; 120-Memory; 130-Input unit; 131-Touch screen; 132-Other input devices; 140-Display unit; 150-Camera; 160-Audio circuit; 161-Speaker; 162-Microphone; 163-Headphone jack; 170-Processor; 180-External interface; 190-Power supply. DETAILED DESCRIPTION

[0037] EMC (Electromagnetic Compatibility) radiated immunity testing is a method used to evaluate the interference immunity capabilities of a device / system in an electromagnetic radiation environment. This testing is designed to determine whether the device / system can maintain normal functionality and performance when exposed to electromagnetic radiation. During EMC radiated immunity testing, the device / system is exposed to simulated or actual electromagnetic radiation fields to simulate the electromagnetic interference that may be encountered in a real working environment. The test then observes whether the device / system's operating status and performance are disturbed or degraded by the electromagnetic radiation field. During EMC radiated immunity testing, the device / system is subjected to electromagnetic radiation at multiple frequencies and power levels according to standard requirements to evaluate its interference immunity capabilities in different electromagnetic radiation environments. By evaluating the EMC radiated immunity capabilities of a device / system, electromagnetic interference issues that may cause device / system failure or performance degradation can be identified and resolved, and the EMC performance of the device / system can be optimized.

[0038] A BMS (Battery Management System) is a crucial component of modern battery technology. It's used to safely monitor and effectively manage battery modules to improve battery efficiency, playing a particularly crucial role in electric vehicles and renewable energy storage systems. BMS tasks include real-time monitoring of battery status (such as voltage, current, and temperature), assessing battery health, balancing battery cells, controlling battery charge and discharge, predicting battery life, and protecting the battery from adverse conditions.

[0039] The BMS primarily consists of a CMU (Cell Monitor Unit), a BMU (Battery Management Unit), and relays, including a main positive relay and a main negative relay. The CMU is connected to the BMU and is primarily responsible for measuring battery status parameters (such as voltage, current, and temperature) and transmitting this data to the BMU. The BMU is primarily responsible for evaluating the data transmitted by the CMU. If the data is abnormal, it protects the battery by requesting a current reduction or shutting off the charge and discharge path to prevent the battery from exceeding permitted operating conditions. The relay is connected to the BMU to verify that the BMU can properly control the relay's on and off function.

[0040] EMC radiation immunity testing of BMSs is crucial for ensuring product compliance with national and international standards and customer requirements. For example, the BMS of electric vehicles is becoming increasingly intelligent and is being equipped with a growing number of body controllers, which inevitably leads to a more complex electromagnetic environment. As a crucial component of the vehicle's powertrain, ensuring the integrity and effectiveness of the BMS's functionality in this complex electromagnetic environment directly impacts the safety of passengers and property. Therefore, EMC radiation immunity testing of electric vehicle BMSs is crucial.

[0041] BMS is mostly integrated inside the battery pack (when a single battery cell cannot meet the voltage and / or power requirements, multiple battery cells need to be combined into a battery module in series and parallel. The battery pack is generally composed of a battery module, a thermal management system, a BMS, an electrical system and structural parts). In the prior art, when conducting EMC radiation immunity tests on BMS, most of the test systems are built on the actual battery pack (i.e., simulating various actual usage scenarios, using the actual battery pack as the object to be tested, and completing the test of the BMS integrated inside it by testing the actual battery pack). However, the battery pack structure and the position of the BMS in the battery pack will affect the EMC radiation immunity capability of the BMS. Even for battery packs using the same BMS, there are inevitably differences in the battery pack structure and the position of the BMS in the battery pack. Therefore, it is difficult to ensure the reproducibility of the test results.

[0042] Among them, the impact of the battery pack structure on the EMC radiation immunity capability of the BMS refers to the fact that the metal shell of the battery pack will have a shielding and protective effect on the BMS, resulting in a reduction in the actual field strength loaded on the BMS, while the non-metallic shell is quite different when conducting this test.

[0043] The impact of the BMS's position in the battery pack on the BMS's EMC radiation immunity capability refers to the fact that when BMS components are distributed at the top, front, and rear of the battery pack, the electromagnetic radiation interference intensity will be different due to the limitations of the test system construction.

[0044] The reproducibility of a BMS's EMC radiation immunity test results refers to the consistency and repeatability of test results under a given frequency and power level of electromagnetic radiation. The results are unaffected by factors such as the battery pack structure and the BMS's position within the pack. Test result repeatability is a key indicator for evaluating test result reliability.

[0045] To improve the reproducibility and reliability of BMS EMC radiation immunity test results, the present application discloses an EMC radiation immunity test system for a BMS. This test system uses a BMU, CMU, relays, and a cell simulator to form a simulated battery pack, replacing the actual battery pack in the test. In the test system, because there is no physical battery pack and the BMS is fixed relative to the pack, differences in test results caused by the same BMS but different battery pack structures and / or BMS positions within the pack are avoided, resulting in highly reliable test results. This test system is reliable and versatile.

[0046] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0047] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0048] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0049] See also Figure 1 , an EMC radiation immunity test system for a BMS provided in an embodiment of the present application includes: a BMS placement platform to be tested, a battery cell simulator 10, a power supply 9, an artificial network 8, an antenna 15, a radio frequency generator 12 and a host computer 17;

[0050] Among them, the BMS placement platform to be tested, the battery cell simulator 10, the power supply 9, the artificial network 8 and the antenna 15 are all placed inside the EMC darkroom 16, and the RF generator 12 and the host computer 17 are all placed outside the EMC darkroom 16;

[0051] The BMS to be tested placement platform is used to place the BMS to be tested, which includes a BMU 1, a CMU 7 and a relay, wherein the relay includes a main positive relay 5 and a main negative relay 6; the BMS to be tested and the cell simulator 10 form a whole to simulate the battery pack, the signal acquisition end of the CMU 7 is connected to the cell simulator 10, the BMU 1 is connected to the control end of the relay, and the BMU 1 is also connected to the CMU 7 and the host computer 17 (in communication). Figure 1 In the figure, the communication line between the BMU 1 and the host computer 17 is indicated by a dotted line);

[0052] The output end of the power supply 9 is connected to the power supply end of the BMU 1 through the artificial network 8. The artificial network 8 is used to filter out the noise in the output signal of the power supply 9.

[0053] The output end of the RF generator 12 is connected to the antenna 15 inside the EMC darkroom 16 via a cable 14 (double-shielded coaxial cable is recommended) through a bulkhead connector 13 provided on the wall of the EMC darkroom 16 .

[0054] The working principle of the embodiment of the present application is described in detail below:

[0055] The EMC chamber 16, also known as a semi-anechoic chamber, is an electromagnetically shielded chamber with electromagnetic wave absorbing materials applied to the interior walls and ceiling. The floor serves as an ideal reflective surface, simulating the testing conditions of an open field. The electromagnetic wave absorbing materials ensure the chamber's absorption properties, and the walls of the chamber eliminate reflected waves, resulting in high measurement accuracy during electromagnetic radiation emission and reception tests, making it an ideal EMC testing site.

[0056] To conduct EMC radiation immunity testing on a BMS, a test system must first be established within an EMC chamber 16. This involves placing the BMS under test on a test platform, arranging the internal and external components of the chamber, and connecting the appropriate wiring. In this test system, the output signal of power supply 9 is filtered by artificial network 8 before being supplied to BMU 1 to ensure sufficient power for testing. Antenna 15 is connected to an RF generator 12 outside the chamber via cable 14 and a bulkhead connector 13 on the wall of the chamber. RF generator 12 emits an RF signal to simulate a test interference signal. This interference signal is transmitted through antenna 15 to ensure that the BMS under test is tested in the conditions and states required by the standard.

[0057] After the test system is set up, the BMS can be controlled to enter normal working state, the test field strength is applied in the EMC darkroom 16, and the EMC radiation immunity test of the BMS is started. During the test, the CMU detects the status parameters of the battery cell simulator and transmits them to the BMU. The BMU uploads these status parameters to the host computer and controls the on and off of the relay according to the instructions issued by the host computer; the host computer monitors key signals of the BMU and CMU, such as battery cell voltage, relay status, etc., and evaluates the EMC radiation immunity of the BMS by judging whether the BMS can maintain a normal state during the test compared to before the test (for example, judging whether the battery cell voltage can be collected normally and whether the relay can maintain a closed state normally).

[0058] In a certain test scenario, the EMC radiation immunity test method of BMS is as follows: Figure 2 Shown, including:

[0059] Step S01: After the EMC radiation immunity test system of the BMS is built, the host computer 17 controls the BMS to enter a normal working state, and then enters step S02.

[0060] Step S02: applying a test field strength in the EMC darkroom 16, and then proceeding to step S03.

[0061] Step S03: The host computer 17 determines whether the cell voltage can be normally collected and whether the relay can normally maintain the closed state; if both conditions are met (i.e., the cell voltage cannot be normally collected and the relay cannot normally maintain the closed state), the process proceeds to step S04; if at least one of the conditions is not met, the process proceeds to step S05;

[0062] Step S04: the host computer 17 determines that the EMC radiation immunity performance of the BMS meets the requirements, and the test method under the current test field strength ends.

[0063] Step S05: the host computer 17 records the frequency band and test field strength threshold corresponding to the BMS failure. Thus, the test method under the current test field strength ends.

[0064] Compared with the traditional test bench, the embodiment of the present application avoids the difference in test results caused by the same BMS but different battery pack structure and / or position of the BMS in the battery pack because there is no battery pack entity and the position of the BMS relative to the antenna 15. The examination of the EMC radiation and interference immunity performance of the BMS is more objective, ensuring the reliability of the test results.

[0065] Compared with traditional test benches, the embodiments of the present application get rid of the constraints of the battery pack, reduce the work of carrying the battery pack, avoid the difficulties in test layout caused by the large size and heavy weight of the battery pack and the large space requirements for the test site, reduce the test layout time, and reduce the test cost.

[0066] Optionally, based on any of the above disclosed embodiments, the communication link used between the BMU and the host computer may be a CAN (Controller Area Network) link or other, but is not limited thereto.

[0067] CAN is a serial communication protocol bus designed for real-time applications. It uses twisted-pair wiring for signal transmission and is one of the most widely used fieldbuses in the world. The CAN protocol is used for communication between various components in automobiles, replacing expensive and bulky distribution wiring harnesses. The robustness of the protocol has extended its use to other automation and industrial applications. Features of the CAN protocol include complete serial data communication, real-time support, transmission rates up to 1 Mb / s, 11-bit addressing, and error detection.

[0068] Optionally, based on any of the embodiments disclosed above, still refer to Figure 1 Considering that there are many lines connected to the BMU, in order to arrange the lines in the EMC chamber 16 neatly, all the lines connected to the BMU can be bundled into a bundle 4. The bundle 4 is placed along a straight line on a non-conductive, low relative dielectric constant support (for example, a dielectric constant εr ≤ 1.4) 3, at a position a first preset distance above the ground plane 2 of the EMC chamber 16.

[0069] Specifically, throughout the continuous development of electronic technology, the microelectronics industry has largely maintained the correctness of Moore's Law. To improve the performance and speed of integrated circuits, more and smaller transistors are being integrated into chips. With this trend toward miniaturization, the distance between different layers of wires in a chip is also decreasing. As the thickness of silicon dioxide (SiO2), used as an insulating layer between wires, decreases, its capacitance increases. This charge accumulation interferes with signal transmission, reduces circuit reliability, and limits further increases in frequency. To address this issue, the microelectronics industry is using low-k dielectric materials to replace traditional silicon dioxide insulating materials. Low-k dielectric materials are dielectrics with relatively low dielectric constants (lower than SiO2).

[0070] Optionally, based on any of the embodiments disclosed above, the battery cell simulator 10 may use a lithium-ion battery for simulation, but is not limited thereto.

[0071] Optionally, based on any of the embodiments disclosed above, considering that in the test system, the cell simulator 10 is a test auxiliary device and is easily affected by the electromagnetic radiation field strength, in order to avoid affecting the judgment of the test results, the cell simulator 10 can be placed in a shielding box, so as to perform shielding protection on the cell simulator 10, such as Figure 3As shown. A shielding box is a metal body made of conductive or magnetic materials in various shapes such as shells, plates, and sleeves. It limits electromagnetic energy to a certain spatial range and is used to suppress radiation interference. It also processes conduction and radiation to provide an interference-free test environment for the wireless communication device under test.

[0072] Optionally, based on any of the above-disclosed embodiments, the BMS, BMU, and CMU can be used as separate test objects to assess the EMC radiation immunity of the BMU and CMU, respectively. This avoids discrepancies in test results caused by different BMU and CMU placements due to different battery packs, allowing for a more comprehensive assessment of product performance. To this end, the BMS placement platform includes a mobile platform for alternately moving the BMU and CMU to positions at a second predetermined distance from the antenna 15.

[0073] Alternatively, as Figure 4 As shown, the mobile platform includes: a motor, an actuator, a storage platform and a motor controller; the BMU and CMU are placed on the storage platform, the storage platform is connected to the end of the actuator, and the motor controller is connected to the host computer 17 and the motor; the motor controller is used to drive the motor to rotate under the control of the host computer 17, and the actuator is driven by the rotation of the motor, so that the BMU and CMU placed on the storage platform are alternately moved to a position at a second preset distance from the antenna 15.

[0074] Alternatively, as Figure 5 As described above, the actuator and the storage table form a rotating table, and the storage table is the desktop of the rotating table. The actuator includes a base 19 and a rotating shaft 20 of the rotating table. The bottom end of the rotating shaft 20 is movable and sunk into the base 19, and the top end of the rotating shaft 20 is fixed to the desktop 18; the BMU and CMU are placed on the desktop 18, and the distance from the center of the desktop 18 is equal; the rotating shaft 20 is linked to the motor, and the rotation of the motor drives the rotating shaft 20 to rotate, thereby causing the BMU and CMU on the desktop 18 to move alternately to a position at a second preset distance from the antenna 15.

[0075] The table top 18 may be a circular table top (eg Figure 5 ) or square desktop, etc., are not limited.

[0076] The base 19 can be fixed on the floor of the EMC darkroom 16 .

[0077] Optionally, based on any of the embodiments disclosed above, for example Figure 6 As shown, the RF generator 12 may be equipped with its own input and output devices (such as buttons and a display screen), and the user may directly input signals on the input and output devices to adjust the output signal of the RF generator 12.

[0078] Or, for example Figure 7 As shown, the radio frequency generator 12 is connected to the host computer 17 (at Figure 7 In the figure, the communication line between the RF generator 12 and the host computer 17 is indicated by a dotted line), which is used to automatically adjust the output signal under the control of the host computer 17, eliminating the need for manual adjustment.

[0079] Optionally, based on any of the above-disclosed embodiments, the host computer 17 in the embodiment of the present application can be a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc., and the embodiment of the present application does not impose any restrictions on this. Figure 1 、 Figures 3 to 7 In the example, the host computer 17 is a laptop computer.

[0080] Figure 8 An optional hardware structure diagram of the host computer 17 is shown.

[0081] refer to Figure 8 As shown, the host computer 17 may include a communication interface 110, a memory 120, an input unit 130, a display unit 140, a camera 150 (optional), an audio circuit 160 (optional), a speaker 161 (optional), a microphone 162 (optional), an earphone jack 163 (optional), a processor 170, an external interface 180, a power supply 190 and other components. Those skilled in the art will understand that Figure 8 These are merely examples of terminals or multi-function devices and do not limit the terminal or multi-function device. The terminal or multi-function device may include more or fewer components than shown in the figure, or may combine certain components or different components.

[0082] The input unit 130 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the portable multifunction device. Specifically, the input unit 130 may include a touch screen 131 (optional) and / or other input devices 132. The touch screen 131 can detect user touch operations on or near it (for example, operations performed on or near the touch screen using a finger, joint, stylus, or any other suitable object) and drive corresponding connected devices according to pre-set programs. The touch screen can detect user touch actions on the touch screen, convert the touch actions into touch signals and transmit them to the processor 170. It can also receive and execute commands sent by the processor 170; the touch signals include at least touch point coordinate information. The touch screen 131 provides an input interface and an output interface between the terminal 100 and the user. Touch screens can be implemented using various types, including resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch screen 131, the input unit 130 may also include other input devices. Specifically, the other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, and the like.

[0083] Among them, the input device 132 can receive input data and the like.

[0084] The display unit 140 can be used to display information input by or provided to the user, various menus of the terminal 100, interactive interfaces, file display, and / or playback of any multimedia file. In an embodiment of the present application, the display unit 140 can be used to display an interface for the EMC radiation immunity test results of the BMS, etc.

[0085] Memory 120 can be used to store instructions and data. It primarily includes an instruction storage area and a data storage area. The data storage area can store various data, such as multimedia files and text. The instruction storage area can store software units such as the operating system, applications, and instructions required for at least one function, or subsets or extensions thereof. It may also include non-volatile random access memory (RAM). It provides processor 170 with management functions for the hardware, software, and data resources within the computing and processing device, supporting control software and applications. It is also used to store multimedia files and running programs and applications.

[0086] The processor 170 is the control center of the host computer 17. It connects all components of the host computer 17 using various interfaces and circuits. By running or executing instructions stored in the memory 120 and accessing data stored in the memory 120, it performs various functions of the host computer 17 and processes data, thereby providing overall control over external devices. Optionally, the processor 170 may include one or more processing units. Preferably, the processor 170 may integrate an application processor and a modem processor, with the application processor primarily processing the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 170. In some embodiments, the processor and memory may be implemented on a single chip; in some embodiments, they may be implemented on separate chips. The processor 170 may also be used to generate corresponding operational control signals and send them to corresponding components of the computing and processing device. It may also read and process data in the software, particularly the data and programs in the memory 120, to enable the various functional modules therein to perform their corresponding functions, thereby controlling the corresponding components to operate as instructed.

[0087] Among them, the memory 120 can be used to store software codes related to the EMC radiation immunity test method of the BMS, the processor 170 can execute the steps of the EMC radiation immunity test method of the BMS, and can also schedule other units (such as the above-mentioned input unit 130 and the display unit 140) to implement corresponding functions.

[0088] In this embodiment of the present application, the communication interface 110 can send data to the BMU and receive processing results sent by the BMU.

[0089] The host computer 17 also includes a power supply 190 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 170 through a power management system, thereby realizing functions such as charging, discharging, and power consumption management through the power management system.

[0090] The host computer 17 also includes an external interface 180 , which can be a standard Micro USB interface or a multi-pin connector. It can be used to connect the host computer 17 to other devices for communication, and can also be used to connect a charger to charge the terminal 100 .

[0091] Although not shown, the host computer 17 may further include a flashlight, a wireless fidelity (WiFi) module, a Bluetooth module, sensors with different functions, etc., which will not be described in detail here.

Claims

1. A BMS EMC radiation immunity test system, characterized in that: include: The BMS to be tested is placed on a platform, a battery cell simulator (10), a power supply (9), an artificial network (8), an antenna (15), a radio frequency generator (12) and a host computer (17); The BMS placement platform to be tested, the battery cell simulator (10), the power supply (9), the artificial network (8) and the antenna (15) are all placed inside the EMC darkroom (16); the radio frequency generator (12) and the host computer (17) are all placed outside the EMC darkroom (16); The BMS placement platform to be tested is used to place the BMS to be tested, and the BMS to be tested includes a BMU (1), a CMU (7) and a relay; The signal acquisition terminal of the CMU (7) is connected to the cell simulator (10); The BMU (1) is connected to the control end of the relay, and the BMU (1) is also connected to the CMU (7) and the host computer (17) for communication; The output end of the power supply (9) is connected to the power supply end of the BMU (1) via the artificial network (8), and the artificial network (8) is used to filter out noise in the output signal of the power supply (9); The output of the radio frequency generator (12) is connected to the antenna (15) via a cable (14).

2. The EMC radiation immunity test system of BMS according to claim 1, characterized in that: The EMC radiation immunity test system of the BMS further includes: a shielding box (11); The battery cell simulator (10) is placed inside the shielding box (11).

3. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: The cable (14) is a double-shielded coaxial cable.

4. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: The BMU (1) and the host computer (17) are connected to each other via a CAN link.

5. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: All wires connected to the BMU are bundled into a wire harness (4); The wiring harness (4) is placed along a straight line on a low relative dielectric constant support (3) at a first preset distance above a ground plane (2) of an EMC darkroom (16).

6. The EMC radiation immunity test system of BMS according to claim 5, characterized in that: The dielectric constant of the low relative dielectric constant support (3) is less than or equal to 1.

4.

7. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: The BMS placement platform to be tested includes a mobile platform; The mobile platform is used to alternately move the BMU (1) and the CMU (7) to a position at a second preset distance from the antenna (15).

8. The EMC radiation immunity test system of BMS according to claim 7, characterized in that: The mobile platform includes: a motor, an actuator, a storage platform and a motor controller; The storage platform is connected to the end of the actuator, and the motor controller is connected to the host computer (17) and the motor; The motor controller is used to drive the motor to rotate under the control of the host computer (17), and the rotation of the motor drives the actuator to move so that the BMU and CMU placed on the storage table are alternately moved to a position at a second preset distance from the antenna (15).

9. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: The radio frequency generator (12) is connected to the host computer (17) and is used for adjusting the output signal under the control of the host computer (17).

10. The EMC radiation immunity test system of BMS according to claim 1 or 2, characterized in that: The battery cell simulator (10) is obtained by simulating a lithium-ion battery.

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