Battery management system experiment platform

Abstract

The utility model relates to the technical field of batteries, and discloses a battery management system experiment platform, which comprises a cabinet body, a CAN communication module, an integrated module, a charger assembly, a motor assembly, a battery assembly and an upper computer outside the cabinet body, the cabinet body is provided with a cabinet door and an observation window; the integrated module is arranged on the front cabinet door and comprises a touch screen controller module, a touch screen electrically connected with the touch screen controller module, an electric instrument and a key assembly. The interior of the cabinet body is divided into a first space, a second space and an isolation space between the first space and the second space. The second space is divided into a plurality of subspaces through a partition plate frame; the partition plate frame is provided with a plurality of vibration reduction pieces and forms a hollow gap. The battery assembly is placed in the first space, and the charger assembly and the motor assembly are placed in corresponding subspaces of the second space; the CAN communication module further comprises a communication adapter connected with the upper computer and the touch screen controller module. The whole structure of the experiment platform is more compact and safer, external interference is reduced, and experiment precision and working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an experimental platform for a battery management system. Background Technology

[0002] The battery management system (BMS) is a core component of electric vehicles and hybrid electric vehicles, serving as the heart of their powertrain. It primarily performs online detection and real-time monitoring of the vehicle's batteries, providing the vehicle with information such as battery voltage, current, temperature, state of charge (SOC), and insulation status. Simultaneously, it assesses the battery's operating status and the battery pack's inherent characteristics in real time. If a fault occurs, it promptly sends a fault signal and triggers an alarm to the vehicle. Therefore, research into BMS and battery pack protection is crucial to adapt to the evolving demands of automotive technology in battery management.

[0003] Currently, the battery management system experimental platform used by the school includes a base frame and related integrated modules installed on the base frame, while components such as battery packs and motors are placed on the base support and connected to the integrated modules via cables.

[0004] The existing experimental platforms face numerous challenges in practical use. The most significant is the open, distributed placement of key components such as battery packs and motors on the base support. Sometimes, for ease of connection, some components are even placed on the floor outside the base support. This layout not only poses safety hazards but also risks operators accidentally touching live parts or high-speed rotating mechanical structures, leading to accidents. Furthermore, the open arrangement hinders the acquisition of accurate data, as external environmental factors such as temperature fluctuations can adversely affect measurement results, causing data deviations and impacting the accuracy and reliability of experimental results. Moreover, existing experimental platforms employ large integrated modules to clearly demonstrate the connection methods of the entire battery management system, resulting in a large footprint. However, the actual space occupied by key components such as battery packs and motors is relatively small, leading to a mismatch in space utilization. In laboratory spaces with limited capacity, this layout makes efficient space utilization and flexible arrangement difficult, limiting the number of devices, increasing the complexity of management and maintenance, and reducing the efficiency of scientific research. Utility Model Content

[0005] The present invention aims to provide a battery management system experimental platform, optimize the structure of the experimental platform to make it more compact and safe, and effectively reduce external interference, which is of great significance for improving experimental accuracy and work efficiency.

[0006] The basic solution provided by this utility model is: a battery management system experimental platform, including a cabinet, a CAN communication module, an integrated module, a charger assembly, a motor assembly and a battery assembly integrated and electrically connected within the cabinet, and a host computer located outside the cabinet.

[0007] The cabinet has movable doors on both the front and rear surfaces; observation windows are provided on the sides and / or rear surface of the cabinet.

[0008] The integrated module includes a touch screen controller module located inside the front cabinet door, and a touch screen, electrical instruments, and button assembly electrically connected to the touch screen controller module and located outside the front cabinet door.

[0009] The cabinet interior is divided into a first space, a second space, and an isolation space between the two; the second space is divided into several sub-spaces by a partition frame; the partition frame is equipped with several vibration damping components and forms a gap in the middle space; several heat dissipation holes are opened on the cabinet corresponding to the positions of the isolation space and the gap in the middle space of the partition frame; the battery assembly is placed in the first space, and the charger assembly and motor assembly are placed in the corresponding sub-spaces of the second space;

[0010] The CAN communication module also includes a communication adapter installed on the outside of the front cabinet door, which connects the host computer and the touch screen controller module.

[0011] Furthermore, the charger assembly includes a charger; the motor assembly includes a motor and a motor controller that are electrically connected; the battery assembly includes a battery pack, a plurality of individual cell detection and equalization charging modules, and a battery pack thermal management module that are electrically connected; wherein, the charger, the motor controller, the plurality of individual cell detection and equalization charging modules, and the battery pack thermal management module are all electrically connected to the CAN communication module.

[0012] Furthermore, the touchscreen controller module includes a battery management chip, a main controller, and a power chip that are electrically connected. The main controller is electrically connected to the touchscreen, electrical instruments, and button components. The main controller is connected to a relay fuse assembly, which is electrically connected to the battery assembly.

[0013] Furthermore, the battery management chip uses the BQ76952 model device.

[0014] Furthermore, the battery management chip is connected to a 12V detection interface for both CAN and non-CAN signals.

[0015] Furthermore, the partition frame includes a fixed plate and a mounting plate. The fixed plate is connected to the cabinet body, and the mounting plate is located above the fixed plate and is connected to the fixed plate at least at each of its four corners by a vibration damping element.

[0016] Furthermore, the cabinet has protrusions on both sides of the mounting plate corresponding to the location where the partition frame is installed, with the protrusions located above the mounting plate.

[0017] Furthermore, the observation window is sealed with explosion-proof glass.

[0018] Furthermore, a shelf can be rotatably installed on the side of the cabinet near the communication adapter.

[0019] Furthermore, at least on the side wall corresponding to the first space inside the cabinet, there are fire detectors, fire alarms, and cameras aimed at the battery assembly. The fire detectors, fire alarms, and cameras are electrically connected to the CAN communication module via data cables.

[0020] The working principle and advantages of this utility model are as follows:

[0021] By optimizing the experimental platform structure, while maintaining the modular design of the battery management system components, all related components are integrated into a cabinet, making it more compact and with a reasonable overall space occupation. Each component is efficiently laid out according to its operating characteristics and the experimental needs of multiple people operating simultaneously. The components are safely isolated, effectively reducing external interference and providing a safe and convenient experimental operating environment for the battery management system for multiple people, ensuring the accuracy of data transmission during the experiment.

[0022] The front surface of the cabinet features electrical instruments and a touchscreen, providing multi-angle data display to meet the needs of multiple users sharing a single experimental platform for data observation. The touchscreen is embedded in the cabinet surface, making it easy to operate without taking up extra space. Its size can be customized to fit the cabinet surface, and the display content can be customized as needed, such as the structural composition of the power battery system, the monitoring and management process and working principle of the battery management system. It offers multiple teaching functions, is vivid and engaging, and is more flexible and adaptable to teaching than displaying schematic diagrams of hardware structures. Various switches are arranged around the touchscreen and grouped according to function, such as power switches and experimental mode switches, for quick and easy operation. The rear surface and two side observation windows provide multi-angle fault diagnosis, suitable for applications where multiple people share a single experimental platform, balancing experimental efficiency and safety.

[0023] The internal space of the cabinet is rationally laid out according to the operating characteristics of each component. Isolation spaces effectively separate critical battery components from other components, while partitions provide vibration damping and heat dissipation for the motor and charger components. This ensures the safe independent operation of each component without interference, improving the accuracy of data transmission during experiments. Furthermore, the rationally designed dimensions of each space within the cabinet can accommodate different component models and quantities of individual batteries, enhancing its versatility.

[0024] The design of the communication adapter enables the touchscreen controller module to communicate with the host computer, allowing for monitoring and data storage via the host computer's control interface. A rotatable shelf is further designed to hold the host computer or laptop needed for experimental operations, providing a suitable recording station for multi-person experiments.

[0025] By improving the battery management system hardware, the accuracy of data collection is ensured, enabling precise collection of various data from electric vehicle batteries and providing essential basic data for management functions such as battery state of charge estimation and health status diagnosis. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of an experimental platform for a battery management system provided in an embodiment of this utility model;

[0027] Figure 2 Right view of an experimental platform for a battery management system provided in an embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of a battery management system experimental platform provided in an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A partial schematic diagram at point A in the middle;

[0030] Figure 5 Rear view of an experimental platform for a battery management system provided in an embodiment of this utility model;

[0031] Figure 6 A schematic diagram of the hardware architecture of a battery management system experimental platform provided in an embodiment of this utility model;

[0032] Figure 7 A schematic diagram of the software architecture of a battery management system experimental platform provided in an embodiment of this utility model;

[0033] Figure 8 This is a schematic diagram of the structure of a touch screen controller module provided in an embodiment of the present utility model;

[0034] The markings in the accompanying drawings include: cabinet 1, cabinet door 11, observation window 12, first space 13, isolation space 131, second space 14, protrusion 141, partition frame 15, fixing plate 151, mounting plate 152, vibration damping component 153, fastener 1531, vibration damping spring 1532, vibration damping block 1533, heat dissipation hole 16, touch screen 2, electrical instrument 3, button assembly 4, communication adapter 5, battery pack 6, charger 7, motor 8, motor controller 81, shelf 9, host computer 10. Detailed Implementation

[0035] The following detailed explanation illustrates the specific implementation methods:

[0036] The basic implementation examples are as follows: Figure 1As shown: A battery management system experimental platform includes a cabinet, a CAN communication module, an integrated module, a charger assembly, a motor assembly, and a battery assembly integrated and electrically connected within the cabinet, and a host computer located outside the cabinet.

[0037] The cabinet has movable doors on both the front and rear surfaces. The integrated module includes a touchscreen controller module, as well as a touchscreen, electrical instruments, and button components electrically connected to the touchscreen controller. The touchscreen controller module is located inside the front cabinet door, while the touchscreen, electrical instruments, and button components are located outside the front cabinet door. In this embodiment, the electrical instruments are located at the top, with the button components arranged below them. The touchscreen is located below the button components, and the screen size can be adapted to design a dual-screen content display. The electrical instruments can display important data such as battery pack temperature, voltage, SOC value, and SOH value. The button components can be equipped with motor control switches, status indicator lights, discharge switches, and power switches to ensure safe operation. The touchscreen can simultaneously display graphic and textual information such as electrical schematics, battery data, and SOC calculation data in split-screen mode. The overall design provides a good user interaction experience with button and display functions, ensuring the requirements of teaching, experimental, and safe operation.

[0038] The CAN communication module includes a CAN bus and a communication adapter. The communication adapter is installed on the outside of the front cabinet door, specifically on the side of the touchscreen in this embodiment. A shelf is rotatably mounted on the side of the cabinet closest to the communication adapter. The height of the shelf is suitable for an adult standing to operate. This rotatable structure can be achieved using existing technology.

[0039] The cabinet has observation windows on its sides and / or rear surface, which are sealed with explosion-proof glass. In this embodiment, for example... Figure 2 As shown, the observation window is set on the side, and its reasonable position allows for effective observation of the corresponding components inside the cabinet. In other embodiments, it can be set on both the side and the rear surface to broaden the field of view and facilitate observation from multiple angles and by multiple people.

[0040] like Figure 3 As shown, the interior of the cabinet is divided into a first space, a second space, and an isolation space between the two; the second space is further divided into several sub-spaces by a partition shelf; the battery assembly is placed in the first space, and the charger assembly and motor assembly are placed in the corresponding sub-spaces of the second space.

[0041] Specifically, the overall dimensions of the cabinet are designed with reference to conventional electrical cabinets, such as 1000*600*2200mm (length*width*height), which is convenient for adults to operate. Each space is rationally designed based on the standard dimensions of the battery pack, motor, motor controller, and charger, leaving sufficient space after placing the corresponding components to ensure effective heat dissipation and universal compatibility with multiple models. In this embodiment, the first space accommodates battery packs of 3 to 16 cells. Along the width of the cabinet, the width of the isolation space can be 4-7cm, with a reasonable hollow volume, effectively isolating the battery pack from other components while reducing the impact of heat and vibration from other components on the battery pack, ensuring the normal operation of the battery pack.

[0042] The partition frame is equipped with several vibration damping elements and forms a central gap, simultaneously achieving vibration damping and enhanced heat insulation. For example... Figure 4 As shown, the partition frame includes a fixed plate and a mounting plate. The fixed plate is fixedly connected to the cabinet, and the mounting plate is located above the fixed plate and is flexibly connected to the fixed plate at least at each of its four corners via a vibration damping element. The design of the vibration damping elements creates a flexible connection between the fixed plate and the mounting plate, absorbing vibrations when the components are placed on the mounting plate, thus achieving effective vibration damping. At the same time, the position of the vibration damping elements creates a gap between the fixed plate and the mounting plate, enhancing the heat insulation of adjacent components. The heat generated by the components is mainly conducted to the mounting plate, and after the heat is dissipated through the gap, the fixed plate, which is close to the adjacent components, absorbs little or no heat. Therefore, the heat generated by the components themselves has almost no impact on the adjacent components.

[0043] In this embodiment, the vibration damping component includes fasteners, damping springs, damping sleeves, and damping blocks. The damping sleeve is a flexible component, such as a rubber component. The fixing plate and mounting plate have matching mounting holes at the vibration damping component mounting locations. Fasteners are sequentially inserted through the damping block, the mounting plate mounting holes, the damping sleeve (with the damping spring sleeved on the outside of the damping sleeve), and the fixing plate mounting holes. The fasteners are conventional bolt and nut fastening components, thus enabling the vibration damping component to be connected to the mounting plate and fixing plate as a whole. When the motor assembly and charger assembly are placed on the corresponding mounting plates, and the motor assembly and charger assembly vibrate on the mounting plates, the damping blocks absorb the vibration, the damping sleeve is subjected to external pressure, and the damping spring is deformed under pressure, with one end suitable for abutting against the mounting plate and the other end suitable for abutting against the fixing plate. The damping spring, damping sleeve, and damping block work together to absorb vibration, improving the vibration absorption effect of the vibration damping component. A flexible connection between the mounting plate and the fixed plate can be achieved by setting a damping spring. By incorporating a flexible damping sleeve within the damping spring, not only is the spring guided, but it also prevents direct contact and a rigid connection between the mounting plate and the fixed plate when the spring is subjected to external pressure. This effectively absorbs component vibration, resulting in a simple structure, high reliability, and convenient installation. In other embodiments, the damping component can adopt other existing structures, as long as it achieves vibration absorption between the mounting plate and the fixed plate and allows for heat dissipation through the space created by the damping component's installation.

[0044] Raised protrusions are fixedly installed at the locations where the shelf racks are installed inside the cabinet, positioned above the opposite sides of the mounting plate. When no components are placed on the mounting plate, the distance between the protrusions and the mounting plate can be 3–5 mm. The protrusions are designed to limit the movement of the mounting plate, ensuring its balance during vibration; simultaneously, when the protrusions and fasteners are appropriately positioned and sized, they can also limit the movement of components placed on the mounting plate.

[0045] like Figure 5 As shown, several heat dissipation holes are opened on the cabinet at the positions corresponding to the gaps between the isolation space and the partition frame. The specific design of the heat dissipation holes can be reasonably arranged according to the heat dissipation characteristics of the components.

[0046] like Figure 6 The diagram shows the hardware structure of the battery management system experimental platform in this embodiment. The charger assembly includes a charger; the motor assembly includes an electrically connected motor and a motor controller; the battery assembly includes an electrically connected battery pack, several individual cell detection and equalization charging modules, and a battery pack thermal management module; the integrated module includes a touch screen controller module, as well as a touch screen, electrical instruments, and button assembly electrically connected to the touch screen controller module; the CAN communication module includes a CAN bus and a communication adapter.

[0047] The charger, motor controller, several individual battery detection and equalization charging modules, battery pack thermal management module, and touch screen controller module are connected via a CAN bus. The host computer and touch screen controller module are connected via a communication adapter, enabling efficient data transmission across the entire battery management system experimental platform. In this embodiment, the communication adapter is a CAN / USB converter. Appropriate cable selection and well-designed wiring channels within the cabinet ensure efficient cabling throughout the system. In other embodiments, the hardware structure can be configured according to experimental requirements.

[0048] like Figure 7 The diagram shows the hardware structure of the battery management system experimental platform in this embodiment. The single-cell detection and equalization charging module collects data such as voltage and temperature of each cell in the battery pack, and also performs data storage and detection of loose wire connections. The touch screen controller module software design mainly implements: data acquisition, battery pack thermal management, equalization charging control, battery pack SOC estimation, battery pack SOH estimation, battery fault alarm and diagnosis, and maximum charge / discharge power Pmax estimation. These functions are all based on the battery voltage, current, temperature, and other parameters obtained from the data acquisition. Specifically, the touchscreen controller module receives voltage, temperature, and SOC information from multiple battery cells via the CAN bus and processes the data; it periodically collects the total voltage and current of the power battery pack (a higher sampling frequency results in better SOC estimation) and sends battery pack current and other information to the individual battery detection and equalization charging module; it estimates the SOC value of individual cells or the battery pack using a specific algorithm based on voltage, current, and temperature information; it estimates the battery SOH; it estimates the maximum charge and discharge power of the battery pack; it performs equalization charging of the battery pack; it monitors abnormal or faulty battery conditions; it issues graded alarms for fault information and takes corresponding protective actions, which are then performed via button components. Data is also displayed via the touchscreen and electrical instruments; the entire system also includes a real-time clock module, with the touchscreen controller module interfaced to read absolute time for calculating the power battery pack's power-off resting time. The charger's charging current is controllable, ranging from 0-300A. When the battery pack needs charging, the touchscreen controller module selects between fast charging and regular charging. The touchscreen controller module communicates with the vehicle's CAN network using an extended CAN communication module. Through the USB-to-CAN communication interface, the touch screen controller module also communicates with the host PC to realize monitoring and data storage under the host computer control interface, including related fault display, parameter setting and graphic drawing.

[0049] like Figure 8As shown, the touchscreen controller module includes a battery management chip, a main controller, and a power chip (forming the core circuit of the battery management system, BMS) that are electrically connected. The main controller is electrically connected to the touchscreen, electrical instruments, and button components. The main controller is connected to a relay-fuse assembly, which is electrically connected to the battery pack. Specifically, the battery pack's connection to the external environment includes fuses, relays, and a sensing resistor. The fuse protects the battery from prolonged overcurrent damage if other protection systems fail. The relays, controlled by the main controller, are used to control the battery's charging and discharging. The current sensing resistor is located between the battery cathode and the PACK-. To ensure heat dissipation while maintaining high measurement accuracy, it can be made into a low-resistance copper block. The current generated during battery discharge creates a voltage drop across the resistor. By measuring this voltage drop, the current discharge of the battery can be determined, allowing for appropriate protection or other measures.

[0050] A dedicated battery management chip integrates a series of peripherals and functions for managing the battery, such as analog-to-digital conversion, linear regulators, and gate drivers. The battery management chip collects important battery parameters (such as voltage, current, and temperature) and forwards this information to the main controller. It also provides a battery balancing solution to optimize battery system performance. In this embodiment, a system is formed by collecting information from 14 batteries, monitoring the battery pack temperature via RTDs, implementing protection functions, low-power modes, etc., and communicating with the main controller. In this embodiment, the battery management chip uses the BQ76952 model, which collects the voltage of each cell and can react based on the voltage data. The chip's integrated RTD detection function simplifies the monitoring system; the RTD in the battery pack can be directly connected to the battery management chip to obtain the current temperature. The chip can determine whether a load or charging device is connected by detecting the voltage or current on the battery bus PACK+ and PACK-. The chip's integrated current detection function can easily obtain the current discharge current. The chip also provides a reusable analog-to-digital converter pin. In this embodiment, the ADC multiplexed pin is used to detect the voltage across the relay to determine the current operating status of the relay and fuse. In addition, to ensure the normal operation of the battery pack in scenarios without a CAN bus, such as electric bicycles, an interface is added for situations without a CAN bus. In this case, the BMS outputs a 12V signal, and the returned signal is connected to the ADC pin. If a 12V signal is returned, the system is operating normally. All of the above information can be exchanged with the main controller MCU through the communication interface. The main controller MCU can use a PIC18F25K80 device, which directly controls the opening and closing of the relays and is the control core of the entire BMS. It communicates with the outside world via the CAN bus, and the communication objects include other battery management systems, motor drive systems, etc. The MCU will only decide whether to close the relay based on the current state when the external CAN bus is connected. The MCU's functions are not limited to this; it also includes button component control, touch screen control, GPS module, DTU data transmission module, etc. The battery management chip and the main controller communicate using the SPI or IIC protocol. The main controller controls certain I / O pins of the battery management chip to achieve low-power mode and wake-up functions.

[0051] Inside the cabinet, at least on the side wall corresponding to the first space, are installed fire detectors, fire alarms, and cameras aimed at the battery pack. The fire detectors, fire alarms, and cameras are electrically connected to a CAN communication module via data cables. Data is transmitted, displayed, and controlled via the CAN communication module to the touchscreen controller module and the host computer. The camera lens faces the battery pack, allowing real-time monitoring and recording of its status. It also features infrared imaging capabilities for recording battery pack conditions in dark environments. The fire alarms and fire detectors are typically installed on the top wall of the corresponding space within the cabinet. These are specialized composite fire detectors capable of real-time acquisition and recording parameters such as smoke concentration and composition, battery and ambient temperature changes, H2 and CO production, and volatile organic compound (VOC) content. The fire detectors, fire alarms, and cameras are arranged according to existing fire protection system installation methods to achieve fire monitoring of the space containing the battery pack.

[0052] This embodiment provides a battery management system experimental platform. By optimizing the experimental platform structure, while maintaining the modular design of battery management system components, all related components are integrated into a cabinet, making it more compact and with a reasonable overall space occupation. Each component is efficiently laid out according to its operating characteristics and the experimental needs of multiple people operating simultaneously. The components are safely isolated, effectively reducing external interference and providing a safe and convenient experimental operating environment for battery management systems for multiple people, ensuring the accuracy of data transmission during the experimental process.

[0053] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all general technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A battery management system experimental platform, characterized in that, The cabinet body, the CAN communication module, the integrated module, the charging machine assembly, the motor assembly and the battery assembly integrated in the cabinet body and electrically connected, and the upper computer arranged outside the cabinet body are comprised. The front surface and the rear surface of the cabinet body are movably provided with cabinet doors. The integrated module comprises a touch screen controller module arranged on the inner side of the front surface cabinet door, and a touch screen, an electrical instrument and a key assembly arranged on the outer side of the front surface cabinet door and electrically connected with the touch screen controller module. The cabinet body is internally divided into a first space, a second space and an isolation space between the two spaces. The CAN communication module further comprises a communication adapter mounted on the outer side of the front surface cabinet door, and the upper computer and the touch screen controller module are connected through the communication adapter.

2. The battery management system experimental platform of claim 1, wherein, The charging machine assembly comprises a charging machine.

3. The battery management system experimental platform of claim 1, wherein, The motor assembly comprises a motor and a motor controller electrically connected.

4. The battery management system experimental platform of claim 3, wherein, The battery assembly comprises a battery pack, a plurality of single battery detection and equalization charging modules and a battery pack thermal management module electrically connected.

5. The battery management system experimental platform of claim 3, wherein, The battery management chip adopts a BQ76952 type device.

6. The battery management system experimental platform of claim 1, wherein, The battery management chip is connected with a 12V detection interface when there is no CAN.

7. The battery management system experimental platform of claim 6, wherein, The fixed plate is connected with the cabinet body, and the mounting plate is located above the fixed plate and connected with the fixed plate through at least one damping member at each of the four corners.

8. The battery management system experimental platform of claim 1, wherein, The position where the mounting plate is located is above the mounting plate.

9. The battery management system experimental platform of claim 1, wherein, The observation window is sealed with explosion-proof glass.

10. The battery management system experimental platform of claim 1, wherein, The side of the cabinet body close to the communication adapter is rotatably mounted with a storage plate. The inside of the cabinet body is provided with a fire detector, a fire alarm and a camera aiming at the battery assembly on at least the side wall corresponding to the first space, wherein the fire detector, the fire alarm and the camera are respectively electrically connected with the CAN communication module through data lines.

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