Battery swapping cabinet detection device and method

Abstract

The application provides a battery replacement cabinet detection device and method in the technical field of battery replacement cabinet safety, which comprises a detection controller, a voltmeter for detecting battery voltage, a control end of which is connected with the detection controller, an ammeter for detecting battery charging and discharging current, a control end of which is connected with the detection controller, a battery charging loop switch for turning on and off the battery charging loop, a control end of which is connected with the detection controller, a battery communication loop switch for turning on and off the battery communication loop, a control end of which is connected with the detection controller, an alternating current internal resistance detection module for detecting the alternating current internal resistance of the battery, a control end of which is connected with the detection controller, and a communication module connected with the detection controller. The application has the advantages that early warning and active protection are realized, and the overall safety of the battery replacement cabinet is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of battery swapping cabinet safety technology, and in particular to a battery swapping cabinet testing device and method. Background Technology

[0002] Battery swapping stations effectively alleviate "range anxiety" for users (especially on-demand delivery riders) and significantly improve charging safety through centralized charging management of lithium batteries. By uniformly procuring compliant batteries (such as lithium iron phosphate batteries) and eliminating inferior or modified batteries used by users (such as batteries assembled using recycled cells or batteries with privately increased capacity), they reduce the risk of fires caused by unauthorized wiring, illegal indoor charging, the proliferation of inferior batteries, and illegal modifications. Simultaneously, battery swapping stations are typically equipped with aerosol fire suppression systems, smoke detectors, and flame-retardant compartments, enabling rapid (within 30 seconds) automatic isolation and extinguishing of fires in a single compartment, effectively suppressing the spread of fire.

[0003] However, the existing safety protection mechanisms of battery swapping cabinets have significant limitations: their protection functions are mostly focused on passive "after-the-fact" responses (such as flame retardant isolation and automatic fire extinguishing), and generally lack the ability to actively detect and warn of battery performance (such as health status and potential faults). This "emphasis on post-incident handling and neglect of pre-incident prevention" model makes it difficult to achieve early identification and proactive intervention of potential safety hazards, resulting in blind spots in safety protection.

[0004] Therefore, how to provide a detection device and method for battery swapping cabinets to achieve early warning and active protection, thereby improving the overall safety of battery swapping cabinets, has become an urgent technical problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a battery swapping cabinet detection device and method to achieve early warning and active protection, thereby improving the overall safety of the battery swapping cabinet.

[0006] In a first aspect, the present invention provides a battery swapping cabinet testing device, comprising:

[0007] A detection controller;

[0008] A voltmeter for detecting battery voltage, with its control terminal connected to the detection controller;

[0009] An ammeter for detecting the charging and discharging current of a battery, with its control terminal connected to the detection controller;

[0010] A battery charging circuit switch for switching the battery charging circuit on and off, with the control terminal connected to the detection controller;

[0011] A battery communication circuit switch for switching the battery communication circuit on and off, with the control terminal connected to the detection controller;

[0012] An AC internal resistance detection module for detecting the AC internal resistance of a battery, with its control terminal connected to the detection controller;

[0013] A communication module is connected to the detection controller.

[0014] Furthermore, the battery charging circuit switch is in the off state by default.

[0015] Furthermore, the battery communication circuit switch is in the off state by default.

[0016] Secondly, the present invention provides a method for testing a battery swapping cabinet, comprising the following steps:

[0017] Step S1: The battery charging circuit switch and the battery communication circuit switch are in the off state; one end of the battery charging circuit switch is connected to the charging power line of the battery swapping cabinet, and the other end is connected to the battery power line of the battery; one end of the battery communication circuit switch is connected to the charging communication line of the battery swapping cabinet, and the other end is connected to the battery communication line of the battery; the ammeter is connected to the charging power line; the voltmeter and the AC internal resistance detection module are both connected to the battery power line.

[0018] Step S2: After the detection device is powered on and started, the detection controller runs in the communication data hijacking mode. The detection controller obtains the data reading command sent by the battery swapping cabinet through the charging communication line, and forwards the data reading command to the battery through the battery communication line; the detection controller obtains the battery's operating data through the battery communication line, and forwards the operating data to the battery swapping cabinet through the charging communication line.

[0019] Step S3: The detection controller obtains the data monitoring command sent by the battery swapping cabinet through the charging communication line, closes the battery communication circuit switch based on the data monitoring command, and switches to the communication data monitoring mode to monitor the communication bus composed of the charging communication line and the battery communication line.

[0020] Step S4: The controller detects the voltage accuracy using a voltmeter;

[0021] Step S5: The detection controller closes the battery charging circuit switch, detects the current accuracy through an ammeter, detects the AC internal resistance through an AC internal resistance detection module, and detects the DC internal resistance through a voltmeter and an ammeter. The detection results of voltage accuracy, current accuracy, AC internal resistance, and DC internal resistance are uploaded through the communication module.

[0022] Step S6: The detection controller performs safety protection operations based on the battery's operating data and the monitored BMS data.

[0023] Furthermore, step S2 also includes:

[0024] Before forwarding the data read command or running data, the data read command or running data is parsed and modified based on a preset communication protocol.

[0025] Furthermore, step S3 also includes:

[0026] During the monitoring of the communication bus, the monitored data is parsed to obtain the battery's operating data, and the monitored operating data is uploaded through the communication module.

[0027] Furthermore, step S4 specifically includes:

[0028] The detection controller detects the battery voltage V11 through a voltmeter and acquires the voltage V12 from the battery BSM through the battery communication line. Based on the voltages V11 and V12, it calculates the voltage accuracy.

[0029] Furthermore, in step S5, the accuracy of current detection via ammeter specifically refers to:

[0030] The detection controller detects the battery's current curve Clist1 using an ammeter and acquires the current curve Clist2 from the battery's BSM via a battery communication line. Based on the current curves Clist1 and Clist2, it calculates the current accuracy.

[0031] Furthermore, in step S5, the detection of DC internal resistance using a voltmeter and an ammeter specifically involves:

[0032] The detection controller modifies the battery's requested current to adjust the battery's charging current. It collects the voltage V21 and current I21 at different times using a voltmeter and an ammeter, respectively, and calculates the DC internal resistance based on the voltage V21 and current I21.

[0033] Furthermore, step S6 specifically includes:

[0034] The detection controller monitors the battery's operating data and the monitored BMS data using preset monitoring thresholds or big data analysis technology. When a safety event is detected, it disconnects the battery charging circuit switch to perform safety protection operations.

[0035] The advantages of this invention are:

[0036] 1. By integrating voltage, current, and AC internal resistance detection modules and dual-loop switches (battery charging loop switch and battery communication loop switch), a hardware monitoring system is constructed. Combined with communication hijacking and eavesdropping modes, it acquires battery operating data in real time, dynamically detects voltage / current accuracy and AC / DC internal resistance, and accurately quantifies battery performance degradation. At the same time, based on preset thresholds or big data analysis, it identifies risk characteristics such as sudden increases in internal resistance and abnormal temperatures, and actively disconnects the charging loop before serious faults such as thermal runaway occur, realizing a closed-loop protection of "monitoring-early warning-interception". This reconstructs the safety logic of the battery swapping cabinet from reactive post-event handling to proactive pre-event defense, completely eliminating blind spots in battery health status, that is, realizing pre-event early warning and proactive protection, thereby greatly improving the overall safety of the battery swapping cabinet.

[0037] 2. The battery charging circuit switch and battery communication circuit switch in the device are in the off state by default, which prevents the risk of short circuit, overcharging or communication interference caused by accidental connection; the switches are kept off in the initial state to ensure safe start of the detection process; safety events (such as overvoltage and overheating) are responded to through safety protection operations (such as disconnecting the charging circuit switch), which significantly reduces the risk of battery explosion or fire.

[0038] 3. The device integrates components such as a voltmeter, ammeter, and AC internal resistance detection module, covering the detection of voltage accuracy, current accuracy, AC internal resistance, and DC internal resistance. This multi-parameter integration allows for a one-time assessment of the battery's health status (such as aging degree and capacity decay), avoiding the cumbersome step-by-step testing and improving testing efficiency. This comprehensive testing capability solves the problem of incomplete parameter coverage in existing technologies, and has high practicality and innovation. It can effectively support battery maintenance decisions and reduce the misjudgment rate.

[0039] 4. By comparing voltmeter and ammeter data with battery management system (BMS) data, voltage and current accuracy are calculated, reducing the error of a single sensor; by adjusting the charging current and collecting data at multiple times to calculate DC internal resistance, the accuracy of internal resistance measurement is improved. This cross-validation mechanism ensures the reliability of the test results.

[0040] 5. The detection controller operates in communication data hijacking mode, forwarding data between the battery swapping cabinet and the battery (data can be parsed and modified). It switches to communication data monitoring mode to monitor and parse the communication bus, allowing real-time data to be obtained without interrupting normal communication, which is convenient for monitoring battery status and potential faults.

[0041] 6. From initial setup to data upload and security protection, the detection controller automatically coordinates the process without manual intervention. For example, it automatically closes the switch to detect internal resistance and uploads the results, and automatically performs safety operations. This reduces detection time (traditional methods require step-by-step operations) and improves the operation and maintenance efficiency of the battery swapping cabinet. In other words, the automated process reduces labor costs and improves detection speed and consistency.

[0042] 7. The communication module allows test results (such as voltage accuracy and internal resistance data) to be uploaded to external systems. It supports uploading monitoring data, which facilitates remote monitoring of battery status. Combined with big data analysis technology, it can predict safety events (such as battery failures), realize preventive maintenance, improve the intelligence and scalability of the system, support Internet of Things (IoT) integration, and conform to the trend of modern battery management.

[0043] 8. Modular design (such as integrating all components into the detection controller) reduces additional hardware requirements; for example, voltmeters and ammeters can be reused for detection, avoiding the purchase of separate equipment. The default disconnect switch design also reduces energy consumption and maintenance costs. Resource optimization makes the solution more economical and easier to deploy.

[0044] 9. By integrating a detection controller, multi-parameter measurement modules (voltage, current, internal resistance), and an intelligent communication switch (charging / communication circuit is disconnected by default), comprehensive automated detection and safety assurance of the battery swapping cabinet's batteries are achieved. The core advantages are significantly improved operational safety (avoiding short circuit or overcharge risks through the default disconnected switch state and real-time safety monitoring mechanism), comprehensive coverage of key battery parameter detection (including voltage / current accuracy, AC / DC internal resistance, etc., supporting cross-verification to improve data reliability), and non-intrusive data acquisition through dynamic communication mode (intelligent switching between hijacking forwarding and listening modes). Combined with the automatic uploading and analysis of results by the remote communication module, the system ultimately ensures high-precision detection while significantly reducing the need for manual intervention, optimizing operation and maintenance efficiency, and improving the safety performance of the battery system. Attached Figure Description

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0046] Figure 1 This is a circuit diagram of a battery swapping cabinet detection device according to the present invention.

[0047] Figure 2 This is a flowchart of a battery swapping cabinet testing method according to the present invention. Detailed Implementation

[0048] The overall concept of the technical solution in this application embodiment is as follows: By integrating voltage, current, AC internal resistance detection modules and dual-loop switches, a hardware monitoring system is constructed. Combined with communication hijacking and eavesdropping modes, the operating data of the battery is obtained in real time, and the voltage / current accuracy and AC / DC internal resistance are dynamically detected to accurately quantify battery performance degradation. At the same time, based on preset thresholds or big data analysis, risk characteristics such as sudden increase in internal resistance and abnormal temperature are identified. Before serious faults such as thermal runaway occur, the charging circuit is actively disconnected to achieve closed-loop protection of "monitoring-early warning-blocking". The safety logic of the battery swapping cabinet is reconstructed from passive post-event handling to proactive pre-event defense, completely eliminating the blind spot of battery health status.

[0049] Please refer to Figures 1 to 2 As shown, a preferred embodiment of the battery swapping cabinet testing device of the present invention includes:

[0050] A detection controller is responsible for collecting relevant data, controlling relevant switches, performing relevant charging protection, and carrying out electrical performance testing and safety testing, etc.

[0051] A voltmeter for detecting battery voltage, with its control terminal connected to the detection controller;

[0052] An ammeter for detecting the charging and discharging current of a battery, with its control terminal connected to the detection controller;

[0053] A battery charging circuit switch for switching the battery charging circuit on and off, with the control terminal connected to the detection controller; the battery charging circuit switch is connected in series in the charging circuit of the battery swapping cabinet and the battery to realize charging protection. The left IN is connected to the charging power line of the battery swapping cabinet, and the right OUT is connected to the battery power line of the battery. It is in the off state by default, and is engaged during operation and disengaged during protection.

[0054] A battery communication circuit switch for switching the battery communication circuit on and off, with the control terminal connected to the detection controller; the battery communication circuit switch is connected in series in the communication circuit between the battery swapping cabinet and the battery, and is used for switching between communication data hijacking and non-hijacking. The left IN is connected to the charging communication line of the battery swapping cabinet, and the right OUT is connected to the battery communication line of the battery; when the switch is engaged, the detection controller does not participate in the communication between the battery swapping cabinet and the battery, and is in the off state by default.

[0055] An AC internal resistance detection module for detecting the AC internal resistance of a battery, with its control terminal connected to the detection controller;

[0056] A communication module, connected to the detection controller, is used for external communication to report data or receive control commands.

[0057] The battery charging circuit switch is in the off state by default.

[0058] The battery communication circuit switch is in the off state by default.

[0059] A preferred embodiment of the battery swapping cabinet testing method of the present invention includes the following steps:

[0060] Step S1: The battery charging circuit switch and the battery communication circuit switch are in the off state; one end of the battery charging circuit switch is connected to the charging power line of the battery swapping cabinet, and the other end is connected to the battery power line of the battery; one end of the battery communication circuit switch is connected to the charging communication line of the battery swapping cabinet, and the other end is connected to the battery communication line of the battery; the ammeter is connected to the charging power line; the voltmeter and the AC internal resistance detection module are both connected to the battery power line.

[0061] Step S2: After the detection device is powered on and started, the detection controller runs in the communication data hijacking mode. The detection controller obtains the data reading command sent by the battery swapping cabinet through the charging communication line, and forwards the data reading command to the battery through the battery communication line; the detection controller obtains the battery's operating data through the battery communication line, and forwards the operating data to the battery swapping cabinet through the charging communication line.

[0062] Step S3: The detection controller obtains the data monitoring command sent by the battery swapping cabinet through the charging communication line, closes the battery communication circuit switch based on the data monitoring command, and switches to the communication data monitoring mode (without the function of sending commands) to monitor the communication bus composed of the charging communication line and the battery communication line (monitoring can be performed from one side only).

[0063] Step S4: The controller detects the voltage accuracy using a voltmeter;

[0064] Step S5: The detection controller closes the battery charging circuit switch, detects the current accuracy through an ammeter, detects the AC internal resistance through an AC internal resistance detection module, and detects the DC internal resistance through a voltmeter and an ammeter. The detection results of voltage accuracy, current accuracy, AC internal resistance, and DC internal resistance are uploaded through the communication module.

[0065] Step S6: The detection controller performs safety protection operations based on the battery's operating data and the monitored BMS data.

[0066] This invention integrates multiple protection functions, enabling not only post-incident protection but also proactive protection through pre-incident electrical performance and safety testing. This reduces the risk of battery thermal runaway from the source, significantly improving the safety of the battery swapping cabinet. It also enables safe charging by monitoring and protecting the charging process in real time, preventing safety accidents caused by charging anomalies.

[0067] Step S2 further includes:

[0068] Before forwarding the data read command or execution data, the data read command or execution data is parsed and modified based on a preset communication protocol. In specific implementations, the hijacked data read command or execution data may or may not be modified.

[0069] Step S3 further includes:

[0070] During the monitoring of the communication bus, the monitored data is parsed to obtain the battery's operating data, and the monitored operating data is uploaded through the communication module.

[0071] Step S4 specifically involves:

[0072] The detection controller detects the battery voltage V11 using a voltmeter (the voltage across P+ and P- is obtained from the voltmeter and denoted as V11), and acquires the voltage V12 from the battery BMS via the battery communication line (there are two acquisition methods: one is that the detection controller directly issues an acquisition command and parses the BMS data in the feedback; the other is that the detection controller listens to the data on the communication bus and parses the BMS data). Based on the voltages V11 and V12, the voltage accuracy is calculated (the detection controller calculates the difference between V11 and V12 to determine whether it exceeds the abnormal range).

[0073] In step S5, the accuracy of current detection via ammeter specifically refers to:

[0074] The detection controller detects the battery's current curve Clist1 through an ammeter and acquires the current curve Clist2 from the battery BSM through the battery communication line. Based on the current curves Clist1 and Clist2, the current accuracy is calculated (the detection controller calculates the difference between Clist1 and Clist2 to determine whether it exceeds the abnormal range, or it can determine the maximum value, average value, or only the data of a few points of the entire curve).

[0075] In step S5, the detection of DC internal resistance using a voltmeter and an ammeter specifically involves:

[0076] The detection controller modifies the battery's requested current to adjust the battery's charging current. Voltage V21 and current I21 are collected at different times using a voltmeter and an ammeter, respectively. The DC internal resistance is calculated based on these voltages and currents. The formula for calculating the DC internal resistance is ΔV / ΔI. In real-time, multiple data points can be detected to calculate the internal resistance curve.

[0077] Step S6 specifically involves:

[0078] The detection controller performs safety monitoring on battery operating data and BMS data using preset monitoring thresholds or big data analytics. When a safety event is detected, it disconnects the battery charging circuit switch to execute safety protection operations. Upon receiving a clear protection command, it then closes the battery charging circuit switch.

[0079] In summary, the advantages of this invention are:

[0080] 1. By integrating voltage, current, and AC internal resistance detection modules and dual-loop switches (battery charging loop switch and battery communication loop switch), a hardware monitoring system is constructed. Combined with communication hijacking and eavesdropping modes, it acquires battery operating data in real time, dynamically detects voltage / current accuracy and AC / DC internal resistance, and accurately quantifies battery performance degradation. At the same time, based on preset thresholds or big data analysis, it identifies risk characteristics such as sudden increases in internal resistance and abnormal temperatures, and actively disconnects the charging loop before serious faults such as thermal runaway occur, realizing a closed-loop protection of "monitoring-early warning-interception". This reconstructs the safety logic of the battery swapping cabinet from reactive post-event handling to proactive pre-event defense, completely eliminating blind spots in battery health status, that is, realizing pre-event early warning and proactive protection, thereby greatly improving the overall safety of the battery swapping cabinet.

[0081] 2. The battery charging circuit switch and battery communication circuit switch in the device are in the off state by default, which prevents the risk of short circuit, overcharging or communication interference caused by accidental connection; the switches are kept off in the initial state to ensure safe start of the detection process; safety events (such as overvoltage and overheating) are responded to through safety protection operations (such as disconnecting the charging circuit switch), which significantly reduces the risk of battery explosion or fire.

[0082] 3. The device integrates components such as a voltmeter, ammeter, and AC internal resistance detection module, covering the detection of voltage accuracy, current accuracy, AC internal resistance, and DC internal resistance. This multi-parameter integration allows for a one-time assessment of the battery's health status (such as aging degree and capacity decay), avoiding the cumbersome step-by-step testing and improving testing efficiency. This comprehensive testing capability solves the problem of incomplete parameter coverage in existing technologies, and has high practicality and innovation. It can effectively support battery maintenance decisions and reduce the misjudgment rate.

[0083] 4. By comparing voltmeter and ammeter data with battery management system (BMS) data, voltage and current accuracy are calculated, reducing the error of a single sensor; by adjusting the charging current and collecting data at multiple times to calculate DC internal resistance, the accuracy of internal resistance measurement is improved. This cross-validation mechanism ensures the reliability of the test results.

[0084] 5. The detection controller operates in communication data hijacking mode, forwarding data between the battery swapping cabinet and the battery (data can be parsed and modified). It switches to communication data monitoring mode to monitor and parse the communication bus, allowing real-time data to be obtained without interrupting normal communication, which is convenient for monitoring battery status and potential faults.

[0085] 6. From initial setup to data upload and security protection, the detection controller automatically coordinates the process without manual intervention. For example, it automatically closes the switch to detect internal resistance and uploads the results, and automatically performs safety operations. This reduces detection time (traditional methods require step-by-step operations) and improves the operation and maintenance efficiency of the battery swapping cabinet. In other words, the automated process reduces labor costs and improves detection speed and consistency.

[0086] 7. The communication module allows test results (such as voltage accuracy and internal resistance data) to be uploaded to external systems. It supports uploading monitoring data, which facilitates remote monitoring of battery status. Combined with big data analysis technology, it can predict safety events (such as battery failures), realize preventive maintenance, improve the intelligence and scalability of the system, support Internet of Things (IoT) integration, and conform to the trend of modern battery management.

[0087] 8. Modular design (such as integrating all components into the detection controller) reduces additional hardware requirements; for example, voltmeters and ammeters can be reused for detection, avoiding the purchase of separate equipment. The default disconnect switch design also reduces energy consumption and maintenance costs. Resource optimization makes the solution more economical and easier to deploy.

[0088] 9. By integrating a detection controller, multi-parameter measurement modules (voltage, current, internal resistance), and an intelligent communication switch (charging / communication circuit is disconnected by default), comprehensive automated detection and safety assurance of the battery swapping cabinet's batteries are achieved. The core advantages are significantly improved operational safety (avoiding short circuit or overcharge risks through the default disconnected switch state and real-time safety monitoring mechanism), comprehensive coverage of key battery parameter detection (including voltage / current accuracy, AC / DC internal resistance, etc., supporting cross-verification to improve data reliability), and non-intrusive data acquisition through dynamic communication mode (intelligent switching between hijacking forwarding and listening modes). Combined with the automatic uploading and analysis of results by the remote communication module, the system ultimately ensures high-precision detection while significantly reducing the need for manual intervention, optimizing operation and maintenance efficiency, and improving the safety performance of the battery system.

[0089] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for testing a battery swapping cabinet, characterized in that: The method requires the use of a battery swapping cabinet testing device, including: A detection controller; A voltmeter for detecting battery voltage, with its control terminal connected to the detection controller; An ammeter for detecting the charging and discharging current of a battery, with its control terminal connected to the detection controller; A battery charging circuit switch for switching the battery charging circuit on and off, with its control terminal connected to the detection controller; the battery charging circuit switch is in the off state by default. A battery communication circuit switch for switching the battery communication circuit on and off, with its control terminal connected to the detection controller; the battery communication circuit switch is in the off state by default. An AC internal resistance detection module for detecting the AC internal resistance of a battery, with its control terminal connected to the detection controller; A communication module is connected to the detection controller; Includes the following steps: Step S1: The battery charging circuit switch and the battery communication circuit switch are in the off state; one end of the battery charging circuit switch is connected to the charging power line of the battery swapping cabinet, and the other end is connected to the battery power line of the battery; one end of the battery communication circuit switch is connected to the charging communication line of the battery swapping cabinet, and the other end is connected to the battery communication line of the battery; the ammeter is connected to the charging power line; the voltmeter and the AC internal resistance detection module are both connected to the battery power line. Step S2: After the detection device is powered on, the detection controller operates in communication data hijacking mode. The detection controller obtains the data read command sent by the battery swapping cabinet through the charging communication line and forwards the data read command to the battery through the battery communication line. The detection controller obtains the battery's operating data through the battery communication line and forwards the operating data to the battery swapping cabinet through the charging communication line. Before forwarding the data read command or operating data, the data read command or operating data is parsed and modified based on a preset communication protocol. Step S3: The detection controller obtains the data monitoring command sent by the battery swapping cabinet through the charging communication line, closes the battery communication circuit switch based on the data monitoring command, and switches to the communication data monitoring mode to monitor the communication bus composed of the charging communication line and the battery communication line; during the monitoring of the communication bus, the monitored data is parsed to obtain the battery's operating data, and the monitored operating data is uploaded through the communication module. Step S4: The detection controller detects the battery voltage V11 through a voltmeter, acquires the voltage V12 from the battery BSM through the battery communication line, and calculates the voltage accuracy based on the voltage V11 and voltage V12. Step S5: The detection controller closes the battery charging circuit switch, detects the current accuracy through an ammeter, detects the AC internal resistance through an AC internal resistance detection module, and detects the DC internal resistance through a voltmeter and an ammeter. The detection results of voltage accuracy, current accuracy, AC internal resistance, and DC internal resistance are uploaded through the communication module. Step S6: The detection controller performs safety monitoring on the battery's operating data and the monitored BMS data through preset monitoring thresholds or big data analysis technology. When a safety event is detected, the battery charging circuit switch is disconnected to perform safety protection operations.

2. The method for testing a battery swapping cabinet as described in claim 1, characterized in that: In step S5, the accuracy of current detection via ammeter specifically refers to: The detection controller detects the battery's current curve Clist1 using an ammeter and acquires the current curve Clist2 from the battery's BSM via a battery communication line. Based on the current curves Clist1 and Clist2, it calculates the current accuracy.

3. The method for testing a battery swapping cabinet as described in claim 1, characterized in that: In step S5, the detection of DC internal resistance using a voltmeter and an ammeter specifically involves: The detection controller modifies the battery's requested current to adjust the battery's charging current. It collects the voltage V21 and current I21 at different times using a voltmeter and an ammeter, respectively, and calculates the DC internal resistance based on the voltage V21 and current I21.

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