Temperature overheat early warning method and device of quick-plug terminal and battery management system

Abstract

The invention provides a temperature overheat early warning method and device of a quick-plug terminal and a battery management system. The temperature overheating early warning equipment applied to the quick-plug terminal comprises a battery management system, the quick-plug terminal and a thermistor, the thermistor is installed in a shell of the quick-plug terminal and makes contact with the quick-plug terminal through the heat conduction device. A lead of the thermistor is led out through a channel reserved on the shell and is electrically connected with the battery management system; the method comprises the following steps: in the working process of the quick-plug terminal, acquiring voltage data of the thermistor through a wire; acquiring resistance data of the thermistor according to the voltage data; according to the resistance data, acquiring temperature data of the quick plug terminal; according to the temperature data of the quick-plug terminal, whether temperature overheating early warning is triggered or not is judged; if it is judged that the temperature overheating early warning is triggered, a target early warning strategy is executed according to the temperature data; wherein different temperature data correspond to different early warning strategies. Abnormal heating of the quick-plug terminal can be identified in time and early warning can be performed.

Description

Technical Field

[0001] This application relates to the field of quick-connect terminal technology, and in particular to a method, device and battery management system for early warning of overheating of quick-connect terminals. Background Technology

[0002] Home Energy Storage Systems (HESS) are a crucial component of distributed energy management, widely used in scenarios such as home photovoltaic grid connection and emergency backup power. This system connects to photovoltaic modules, battery modules, inverters, and other equipment via a DC bus or AC output terminal, and its core function is to store and dispatch electrical energy. During system operation, quick-connect terminals, as critical connection components, bear the responsibility of conducting high-power current; their reliability directly affects the system's stability and safety. However, during long-term operation, quick-connect terminals are prone to abnormal overheating due to factors such as increased contact resistance, overload operation, or environmental corrosion. Such overheating can lead to terminal aging, insulation failure, and even fire accidents.

[0003] Currently, existing technologies indirectly infer the temperature of quick-connect terminals by monitoring the temperature of battery modules and power devices. However, such methods cannot directly reflect the real-time temperature of the quick-connect terminals, making it difficult to identify abnormal heating of the quick-connect terminals in a timely manner and to issue timely warnings. Summary of the Invention

[0004] This application provides a method, device, and battery management system for early warning of overheating of quick-connect terminals, so as to achieve the effect of timely identification of abnormal heating of quick-connect terminals and timely early warning.

[0005] In a first aspect, embodiments of this application provide a method for early warning of overheating of quick-connect terminals, applied to an overheating warning device for quick-connect terminals. The overheating warning device includes: a battery management system, quick-connect terminals, and a thermistor; wherein the thermistor is installed inside the housing of the quick-connect terminal, and the thermistor contacts the quick-connect terminal through a heat-conducting device; the wires of the thermistor are led out through a reserved channel on the housing and electrically connected to the battery management system; the method is applied to the battery management system and includes: during the operation of the quick-connect terminal, acquiring voltage data of the thermistor through the wires; acquiring resistance data of the thermistor based on the voltage data; acquiring temperature data of the quick-connect terminal based on the resistance data; determining whether an overheating warning is triggered based on the temperature data of the quick-connect terminal; if it is determined that an overheating warning is triggered, executing a target warning strategy based on the temperature data; wherein different temperature data correspond to different warning strategies.

[0006] In one possible implementation, obtaining temperature data of the quick-connect terminal based on the resistance data includes: obtaining the resistor type and resistance value from the resistance data; obtaining a resistance temperature correspondence table corresponding to the resistor type; and obtaining the temperature data corresponding to the resistance value from the resistance temperature correspondence table.

[0007] In one possible implementation, determining whether an overheat warning is triggered based on the temperature data of the quick-connect terminal includes: if the temperature data of the quick-connect terminal is less than a first overheat warning threshold, then it is determined that no overheat warning has been triggered; if the temperature data is greater than or equal to the first overheat warning threshold but less than a second overheat warning threshold, then it is determined that a first-level overheat warning has been triggered; if the temperature data is greater than or equal to the second overheat warning threshold but less than a third overheat warning threshold, then it is determined that a second-level overheat warning has been triggered; if the temperature data is greater than or equal to the third overheat warning threshold, then it is determined that a third-level overheat warning has been triggered; wherein the first overheat warning threshold is less than the second overheat warning threshold, and the second overheat warning threshold is less than the third overheat warning threshold.

[0008] In one possible implementation, a target early warning strategy is executed based on temperature data, including: if the temperature data is greater than or equal to a first overheating early warning threshold but less than a second overheating early warning threshold, then the first early warning strategy is executed; if the temperature data is greater than or equal to the second overheating early warning threshold but less than a third overheating early warning threshold, then the second early warning strategy is executed; if the temperature data is greater than or equal to the third overheating early warning threshold, then the third early warning strategy is executed; wherein the first overheating early warning threshold is less than the second overheating early warning threshold, and the second overheating early warning threshold is less than the third overheating early warning threshold.

[0009] In one possible implementation, the overheat warning device for the quick-connect terminal further includes a cloud platform and an indicator light; accordingly, a first warning strategy is executed, including: controlling the indicator light on the indicator light to flash; and sending the first-level warning information to the cloud platform so that the cloud platform can display the first-level warning information.

[0010] In one possible implementation, the overheat warning device for the quick-connect terminal also includes a cloud platform and an indicator light; accordingly, a second warning strategy is executed, including: controlling the indicator light on the indicator light to flash; sending the secondary warning information to the cloud platform so that the cloud platform can display the secondary warning information; and sending a power reduction command to the energy storage system so that the energy storage system can reduce its power according to the power reduction command.

[0011] In one possible implementation, the overheat warning device for the quick-connect terminal also includes a cloud platform and an indicator light; accordingly, a third warning strategy is executed, including: controlling the indicator light on the indicator light to flash; sending the third-level warning information to the cloud platform so that the cloud platform can display the third-level warning information; sending a converter shutdown command and a circuit breaker disconnect command to the energy storage system so that the energy storage system shuts down the converter according to the converter shutdown command and drives the shunt trip unit of the circuit breaker to disconnect the circuit breaker according to the circuit breaker disconnect command.

[0012] Secondly, this application provides a temperature overheat warning device for quick-connect terminals, applied to a temperature overheat warning system for quick-connect terminals. The quick-connect terminal temperature overheat warning system includes: a battery management system, quick-connect terminals, and a thermistor; wherein the thermistor is installed inside the housing of the quick-connect terminal, and the thermistor contacts the quick-connect terminal through a heat-conducting device; the thermistor's wires are led out through a pre-reserved channel on the housing and electrically connected to the battery management system; the device is applied to the battery management system and includes: a voltage data acquisition module, used to acquire voltage data of the thermistor through the wires during the operation of the quick-connect terminal; a resistance data acquisition module, used to acquire resistance data of the thermistor based on the voltage data; a temperature data acquisition module, used to acquire temperature data of the quick-connect terminal based on the resistance data; a judgment module, used to determine whether a temperature overheat warning is triggered based on the temperature data of the quick-connect terminal; and a warning strategy execution module, used to execute a target warning strategy based on the temperature data if a temperature overheat warning is triggered; wherein different temperature data correspond to different warning strategies.

[0013] Thirdly, embodiments of this application provide a battery management system, including: a memory and a processor;

[0014] The memory stores the instructions that the computer executes;

[0015] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0016] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0017] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0018] The overheat warning method, device, and battery management system for quick-connect terminals provided in this application utilize a thermistor characterized by miniaturization, high insulation, and high temperature resistance. The thermistor is installed inside the casing of the quick-connect terminal and contacts it via a heat-conducting device, ensuring good thermal contact between the thermistor's sensing surface and the terminal. This allows the thermistor to sense temperature changes in the quick-connect terminal in real time, providing a direct means of temperature monitoring. The use of the heat-conducting device ensures efficient heat conduction between the thermistor and the terminal, improving the accuracy and response speed of temperature data. This provides a solid foundation for identifying abnormal heating of the quick-connect terminal, offering a more direct and accurate method than indirect temperature inference. Combined with the data processing capabilities of the battery management system, the system determines whether to trigger an overheat warning based on temperature data. When an overheat warning is triggered, a target warning strategy is executed. Different temperature data correspond to different warning strategies, and a multi-level warning logic is designed to promptly identify abnormal heating of the quick-connect terminal and issue timely warnings. In addition, the embedded design of thermistors avoids the poor adaptability problem caused by the large size and complex wiring of traditional contact temperature sensors, and does not damage the convenience and basic structure of the original connectors. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 This is a schematic diagram of the structure of the temperature overheat warning device for quick-connect terminals provided in the embodiments of this application;

[0021] Figure 2 A schematic flowchart illustrating the overheat warning method for quick-connect terminals provided in this application embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the overheat warning device for quick-connect terminals provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the battery management system provided in an embodiment of this application.

[0024] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0026] Figure 1 This is a schematic diagram of the structure of the overheat warning device for quick-connect terminals provided in the embodiments of this application, as shown below. Figure 1 As shown, the overheat warning device for the quick-connect terminal includes: a battery management system 1, a quick-connect terminal 2, a thermistor 3, a heat conduction device 4, a cloud platform 5, and a light display device 6.

[0027] In this embodiment, the thermistor 3 is installed inside the housing 21 of the quick-connect terminal 2. The housing 21 is an insulating housing.

[0028] Among them, quick-connect terminal 2 is an AC / DC quick-connect terminal. AC / DC quick-connect terminals refer to quick-connect terminals that can transmit both AC and DC power.

[0029] In this embodiment, the thermistor 3, through the heat conduction device 4, makes good thermal contact between the temperature sensing surface of the thermistor 3 and the root or main body of the metal conductive pin / sleeve of the quick-connect terminal 2.

[0030] Among them, the heat conduction device 4 can be a miniature thermal grease or thermal adhesive, etc.

[0031] In this embodiment, the wire 31 of the thermistor 3 is led out through a micro-channel reserved on the housing 21 and electrically connected to the battery management system 1.

[0032] In this embodiment, during the operation of the quick-connect terminal 2, the battery management system 1 obtains the voltage data of the thermistor 3 through the wire 31; based on the voltage data, it obtains the resistance data of the thermistor 3; based on the resistance data, it obtains the temperature data of the quick-connect terminal 2; based on the temperature data of the quick-connect terminal 2, it determines whether an overheat warning is triggered; if an overheat warning is triggered, it executes a target warning strategy based on the temperature data; different temperature data correspond to different warning strategies.

[0033] In this embodiment, the battery management system 1 is communicatively connected to the cloud platform 5 and the light display device 6. The battery management system 1 controls the indicator lights on the light display device 6 to flash; the battery management system 1 sends warning information to the cloud platform 5 so that the cloud platform 5 can display the warning information.

[0034] To address the aforementioned technical problems, this application proposes the following technical concept: The inventors have integrated a miniaturized, highly insulating, high-temperature-resistant thermistor with a quick-connect terminal. The thermistor is embedded inside the quick-connect terminal's housing, and a heat-conducting device ensures good thermal contact between the thermistor's sensing surface and the quick-connect terminal, enabling the thermistor to detect real-time temperature changes. Combined with the data processing capabilities of the battery management system, the system determines whether to trigger an overheat warning based on temperature data. When an overheat warning is triggered, different temperature data corresponds to different warning strategies. A multi-level warning logic has been designed to achieve real-time temperature monitoring and tiered warnings for the quick-connect terminal.

[0035] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0036] Figure 2 This is a flowchart illustrating the overheat warning method for quick-connect terminals provided in this application embodiment. The overheat warning device for quick-connect terminals includes: a battery management system, quick-connect terminals, and a thermistor; wherein the thermistor is installed inside the housing of the quick-connect terminal, and the thermistor is in contact with the quick-connect terminal through a heat-conducting device; the thermistor's wires are led out through a pre-reserved channel on the housing and electrically connected to the battery management system; the method is applied to the battery management system, such as... Figure 2 As shown, the method includes:

[0037] S201: During the operation of the quick-connect terminal, the voltage data of the thermistor is obtained through the wire.

[0038] In this embodiment, the thermistor is a negative temperature coefficient (NTC) thermistor. The resistance of an NTC thermistor decreases as temperature increases, and it is used for temperature sensing. For example, when the temperature rises from 25°C to 100°C, the resistance of the NTC thermistor decreases from 10kΩ to 1kΩ.

[0039] Among them, NTC thermistors are characterized by miniaturization, high insulation and high temperature resistance.

[0040] Alternatively, the thermal conductive device may be a miniature thermal grease or thermal adhesive.

[0041] In this embodiment, the NTC thermistor, through a heat-conducting device, ensures good thermal contact between its sensing surface and the root or main body of the metal conductive pin / sleeve of the quick-connect terminal, enabling the NTC thermistor to sense temperature changes of the quick-connect terminal in real time.

[0042] In this embodiment, the quick-connect terminal is an electrical connection terminal adapted for high-power scenarios, capable of transmitting high-ampere currents, and supporting tool-less quick insertion and removal. Quick-connect terminals are a safety blind spot; existing solutions often monitor core components such as batteries or inverters, neglecting the heat generated by increased contact resistance at the connection point of the quick-connect terminal. This embodiment directly senses the temperature change of the quick-connect terminal, essentially placing a monitoring point at the source of the risk.

[0043] In this embodiment, the Battery Management System (BMS) has a built-in constant current source circuit that outputs a stable micro current of 10μA-100μA, which forms a closed loop with the NTC thermistor through wires.

[0044] In this embodiment, when the quick-connect terminal is working, the NTC thermistor adjusts its resistance value according to the temperature change of the quick-connect terminal. The constant current source circuit in the BMS system outputs a constant current to the NTC thermistor. According to Ohm's law, the change in the NTC thermistor will synchronously cause the voltage across its terminals to change.

[0045] In this embodiment, the BMS has a built-in analog-to-digital converter (ADC). The BMS initiates ADC sampling at a fixed frequency (e.g., 1 time / second) to acquire the voltage data across the NTC thermistor. During sampling, filtering is performed, such as mean filtering, to eliminate sampling errors caused by voltage fluctuations and ensure stable voltage data.

[0046] In this embodiment, the NTC thermistor's wires are made of highly insulated, interference-resistant miniature wires to avoid electromagnetic interference causing voltage data distortion.

[0047] In this embodiment, the wires of the NTC thermistor are led out through a miniature channel reserved in the housing of the quick-connect terminal.

[0048] S202: Obtain the resistance data of the thermistor based on the voltage data.

[0049] In this embodiment, the resistance data includes the resistor model of the NTC thermistor and the resistance value of the NTC thermistor.

[0050] In this embodiment, the resistance value of the NTC thermistor is derived in reverse based on Ohm's law.

[0051] Specifically, the constant current source circuit outputs a constant current. Given the current value and the collected voltage data, the resistance value of the NTC thermistor is calculated using a modified formula based on Ohm's law.

[0052] Optionally, if the lead wire has a slight inherent resistance, the BMS will pre-enter the lead resistance calibration value and automatically subtract it during calculation to avoid the lead resistance affecting the accuracy of the NTC thermistor's resistance value.

[0053] S203: Obtain the temperature data of the quick-connect terminal based on the resistance data.

[0054] Specifically, the resistor model and resistance value are obtained from the resistance data; a resistance-temperature correspondence table is obtained for the resistor model; and the temperature data corresponding to the resistance value is obtained from the resistance-temperature correspondence table.

[0055] The resistance-temperature correspondence table stores the temperature data corresponding to different resistance values.

[0056] In this embodiment, NTC thermistors of different resistor models have different characteristics, and the resistance-temperature correspondence table is provided by the manufacturer. The corresponding resistance-temperature correspondence table is obtained based on the resistor model.

[0057] S204: Determine whether to trigger an overheat warning based on the temperature data of the quick-connect terminals.

[0058] Specifically, if the temperature data of the quick-connect terminal is less than the first overheat warning threshold, it is determined that no overheat warning has been triggered; if the temperature data is greater than or equal to the first overheat warning threshold but less than the second overheat warning threshold, it is determined that a first-level overheat warning has been triggered; if the temperature data is greater than or equal to the second overheat warning threshold but less than the third overheat warning threshold, it is determined that a second-level overheat warning has been triggered; if the temperature data is greater than or equal to the third overheat warning threshold, it is determined that a third-level overheat warning has been triggered; wherein the first overheat warning threshold is less than the second overheat warning threshold, and the second overheat warning threshold is less than the third overheat warning threshold.

[0059] In this embodiment, the BMS has pre-stored three overheat warning thresholds. The first overheat warning is T1, such as 70°C; the second overheat warning is T2, such as 85°C; and the third overheat warning is T3, such as 105°C. The first, second, and third overheat warning thresholds can be adjusted according to actual conditions.

[0060] Specifically, if the temperature data is less than T1, no overheating warning is triggered; if T1 ≤ temperature data < T2, a level one overheating warning is triggered; if T2 ≤ temperature data < T3, a level two overheating warning is triggered; if the temperature data is greater than or equal to T3, a level three overheating alarm is triggered.

[0061] Optionally, if the temperature data exceeds the normal temperature measurement range of the NTC thermistor, such as less than -40℃ or greater than 150℃, it is determined to be an NTC thermistor fault, triggering an independent fault alarm, which is different from the overheat warning.

[0062] S205: If it is determined that an overheating warning has been triggered, the target warning strategy shall be executed based on the temperature data; different temperature data correspond to different warning strategies.

[0063] Specifically, step S205 includes S2051 to S2053:

[0064] S2051: If the temperature data is greater than or equal to the first overheat warning threshold, but less than the second overheat warning threshold, then the first warning strategy shall be executed.

[0065] In this embodiment, the overheat warning device for the quick-connect terminal also includes a cloud platform and a light display device.

[0066] Specifically, the indicator lights of the control light display device are made to flash; the Level 1 warning information is sent to the cloud platform so that the cloud platform can display the Level 1 warning information.

[0067] Optionally, the light display device is an LED indicator.

[0068] In this embodiment, the BMS controls the LED indicator to flash, which is used to alert on-site personnel to abnormal temperature of the quick-connect terminals.

[0069] Optionally, the flashing color of the LED indicator can be set, such as yellow.

[0070] Optionally, Level 1 warning information can also be pushed to users' mobile phones simultaneously for non-emergency alerts.

[0071] Optionally, the Level 1 overheat warning triggered this time can be logged.

[0072] S2052: If the temperature data is greater than or equal to the second overheat warning threshold, but less than the third overheat warning threshold, then the second warning strategy shall be executed.

[0073] Specifically, the indicator lights of the control light display device are made to flash; the secondary warning information is sent to the cloud platform so that the cloud platform can display the secondary warning information; and a power reduction command is sent to the energy storage system so that the energy storage system can reduce its power according to the power reduction command.

[0074] In this embodiment, when executing the second warning strategy, the flashing color of the LED indicator can be switched to orange.

[0075] Alternatively, a prominent alarm message can be displayed on the user interface, such as the display screen of the energy storage system.

[0076] In this embodiment, the BMS sends a power reduction command to the energy storage system, causing the energy storage system to operate at reduced power according to a preset strategy, such as reducing it to 50% of the rated power. This reduces the current load on the quick-connect terminals and suppresses further temperature increases.

[0077] Optionally, the triggered Level 2 overheat warning can be logged.

[0078] S2053: If the temperature data is greater than or equal to the third overheat warning threshold, then the third warning strategy shall be executed; wherein the first overheat warning threshold is less than the second overheat warning threshold, and the second overheat warning threshold is less than the third overheat warning threshold.

[0079] Specifically, the indicator lights of the control light display device are flashed; the level 3 warning information is sent to the cloud platform so that the cloud platform can display the level 3 warning information; the converter shutdown command and the circuit breaker disconnect command are sent to the energy storage system so that the energy storage system can shut down the converter according to the converter shutdown command and drive the circuit breaker shunt trip unit to disconnect the circuit breaker according to the circuit breaker disconnect command.

[0080] In this embodiment, when executing the third warning strategy, the flashing color of the LED indicator can be switched to red.

[0081] Alternatively, the LED indicator can be set to always be red.

[0082] In this embodiment, the BMS sends a converter shutdown command to the energy storage system, causing the energy storage system to shut down the converter according to the command, and the converter immediately stops working. The converter is the core of power conversion; after shutdown, there is no current output, cutting off the current passing through the quick-connect terminals at the source.

[0083] The shunt trip unit is the electrically triggered component of the circuit breaker. After receiving the circuit breaker trip command, the energy storage system supplies power to the shunt trip unit through its auxiliary power supply, driving the shunt trip unit to disconnect the circuit breaker. Simply put, it is the circuit breaker's remote trip switch, responsible for physically disconnecting the circuit.

[0084] In this embodiment, when the converter stops working, it stops energy conversion, but a small amount of current may remain in the circuit, or there may be extreme cases where the converter fails and cannot be shut down. Disconnecting the circuit breaker via the shunt trip unit physically cuts off the circuit, which is equivalent to double protection, ensuring that no current flows through the quick-connect terminals. The tripping time of the shunt trip unit is extremely short, usually in the millisecond range. It acts instantly upon receiving a signal, enabling rapid circuit isolation.

[0085] In this embodiment, when the Level 3 overheat warning is triggered, the system is already in a high-risk state and it is not suitable for personnel to approach and operate manually. By disconnecting the circuit breaker through the shunt trip unit, the risk of electric shock or fire can be avoided.

[0086] In this embodiment, all warning information is uploaded to the cloud platform or the user's mobile phone via a wireless communication module. The wireless communication module can be a Wi-Fi module, a Bluetooth module, or a 4G-CAT1 module.

[0087] Optionally, the triggered Level 3 overheat warning can be logged.

[0088] In this embodiment, a multi-level progressive security response is achieved through proactive early warning and hierarchical protection, balancing the timeliness of early warning with system availability.

[0089] Optionally, historical temperature data can be uploaded through the BMS's communication interface for health analysis and predictive maintenance.

[0090] In summary, thermistors possess the characteristics of miniaturization, high insulation, and high temperature resistance. By mounting the thermistor inside the quick-connect terminal housing and ensuring it contacts the terminal via a heat-conducting device, a good thermal contact is formed between the thermistor's sensing surface and the terminal. This allows the thermistor to sense temperature changes in the quick-connect terminal in real time, providing a direct means of temperature monitoring. The use of a heat-conducting device ensures efficient heat conduction between the thermistor and the quick-connect terminal, improving the accuracy and response speed of temperature data. This provides a solid foundation for identifying abnormal heating of the quick-connect terminal, offering a more direct and accurate method than indirect temperature inference. Combined with the data processing capabilities of the battery management system, the system determines whether to trigger an overheat warning based on temperature data. When an overheat warning is triggered, a target warning strategy is executed. Different temperature data correspond to different warning strategies, and a multi-level warning logic is designed to promptly identify abnormal heating of the quick-connect terminal and issue timely warnings. Furthermore, the embedded design of the thermistor avoids the poor compatibility issues caused by the large size and complex wiring of traditional contact temperature sensors, without compromising the convenience and basic structure of the original connector.

[0091] Figure 3 This is a schematic diagram of the structure of the overheat warning device for quick-connect terminals provided in the embodiments of this application, as shown below. Figure 3As shown, the overheat warning device for quick-connect terminals provided in this embodiment is applied to an overheat warning system for quick-connect terminals. The overheat warning system includes a battery management system, quick-connect terminals, and a thermistor. The thermistor is installed inside the housing of the quick-connect terminal and contacts the terminal via a heat-conducting device. The thermistor's wires are led out through a pre-reserved channel on the housing and electrically connected to the battery management system. The device is applied to the battery management system. The overheat warning device for quick-connect terminals also includes a voltage data acquisition module 301, a resistance data acquisition module 302, a temperature data acquisition module 303, a judgment module 304, and a warning strategy execution module 305.

[0092] The voltage data acquisition module 301 is used to acquire the voltage data of the thermistor through wires during the operation of the quick-connect terminal.

[0093] The resistance data acquisition module 302 is used to acquire the resistance data of the thermistor based on the voltage data.

[0094] Temperature data acquisition module 303 is used to acquire temperature data of quick-connect terminals based on resistance data.

[0095] The judgment module 304 is used to determine whether to trigger an overheat warning based on the temperature data of the quick-connect terminal.

[0096] The early warning strategy execution module 305 is used to execute the target early warning strategy based on the temperature data if it is determined that an overheating early warning has been triggered; different temperature data correspond to different early warning strategies.

[0097] In one possible implementation, the temperature data acquisition module 303 is specifically used for: acquiring the resistor model and resistance value from the resistance data; acquiring a resistance temperature correspondence table corresponding to the resistor model; and acquiring the temperature data corresponding to the resistance value from the resistance temperature correspondence table.

[0098] In one possible implementation, the determination module 304 is specifically configured to: determine that no overheating warning has been triggered if the temperature data of the quick-connect terminal is less than the first overheating warning threshold; determine that a first-level overheating warning has been triggered if the temperature data is greater than or equal to the first overheating warning threshold but less than the second overheating warning threshold; determine that a second-level overheating warning has been triggered if the temperature data is greater than or equal to the second overheating warning threshold but less than the third overheating warning threshold; and determine that a third-level overheating warning has been triggered if the temperature data is greater than or equal to the third overheating warning threshold; wherein the first overheating warning threshold is less than the second overheating warning threshold, and the second overheating warning threshold is less than the third overheating warning threshold.

[0099] In one possible implementation, the early warning strategy execution module 305 is specifically configured to: execute the first early warning strategy if the temperature data is greater than or equal to the first overheating early warning threshold but less than the second overheating early warning threshold; execute the second early warning strategy if the temperature data is greater than or equal to the second overheating early warning threshold but less than the third overheating early warning threshold; and execute the third early warning strategy if the temperature data is greater than or equal to the third overheating early warning threshold; wherein the first overheating early warning threshold is less than the second overheating early warning threshold, and the second overheating early warning threshold is less than the third overheating early warning threshold.

[0100] In one possible implementation, the overheat warning device for the quick-connect terminal also includes a cloud platform and an indicator light; correspondingly, the warning strategy execution module 305 is also used to: control the indicator light of the indicator light to flash; and send the first-level warning information to the cloud platform so that the cloud platform can display the first-level warning information.

[0101] In one possible implementation, the overheat warning device for the quick-connect terminal also includes a cloud platform and an indicator light; correspondingly, the warning strategy execution module 305 is also used to: control the indicator light of the indicator light to flash; send the secondary warning information to the cloud platform so that the cloud platform can display the secondary warning information; and send a power reduction command to the energy storage system so that the energy storage system can reduce its power according to the power reduction command.

[0102] In one possible implementation, the overheat warning device for quick-connect terminals further includes a cloud platform and an indicator light; correspondingly, the warning strategy execution module 305 is also used to: control the indicator light of the indicator light to flash; send the three-level warning information to the cloud platform so that the cloud platform can display the three-level warning information; send the converter shutdown command and the circuit breaker disconnect command to the energy storage system so that the energy storage system can shut down the converter according to the converter shutdown command and drive the shunt trip unit of the circuit breaker to disconnect the circuit breaker according to the circuit breaker disconnect command.

[0103] The overheat warning for the quick-connect terminal provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0104] Figure 4 This is a schematic diagram of the battery management system provided in an embodiment of this application. Figure 4 As shown, the battery management system provided in this embodiment includes at least one processor 401 and a memory 402. Optionally, the battery management system further includes a communication component 403. The processor 401, memory 402, and communication component 403 are connected via a bus.

[0105] In a specific implementation, at least one processor 401 executes computer execution instructions stored in memory 402, causing at least one processor 401 to perform the above-described method.

[0106] The specific implementation process of processor 401 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0107] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0108] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0109] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0110] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0111] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0112] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0113] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0114] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0115] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0116] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0117] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0118] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0119] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for early warning of overheating of quick-connect terminals, characterized in that, A temperature overheat warning device for quick-connect terminals is provided. The device includes a battery management system, quick-connect terminals, and a thermistor. The thermistor is installed inside the housing of the quick-connect terminal and contacts the terminal via a heat-conducting device. The thermistor's lead wires are led out through a pre-reserved channel on the housing and electrically connected to the battery management system. The method, applied to the battery management system, includes: During the operation of the quick-connect terminal, the voltage data of the thermistor is acquired through the wire; Based on the voltage data, obtain the resistance data of the thermistor; Based on the resistance data, obtain the temperature data of the quick-connect terminal; Based on the temperature data of the quick-connect terminals, determine whether to trigger an overheat warning; If an overheating warning is triggered, the target warning strategy is executed based on the temperature data; different temperature data correspond to different warning strategies.

2. The method according to claim 1, characterized in that, The step of obtaining the temperature data of the quick-connect terminal based on the resistance data includes: Obtain the resistor type and resistance value from the resistor data; Obtain the resistance temperature correspondence table for the resistor model; Obtain the temperature data corresponding to the resistance value from the resistance-temperature correspondence table.

3. The method according to claim 1, characterized in that, The step of determining whether to trigger an overheat warning based on the temperature data of the quick-connect terminal includes: If the temperature data of the quick-connect terminal is less than the first overheat warning threshold, it is determined that the overheat warning has not been triggered. If the temperature data is greater than or equal to the first overheat warning threshold, but less than the second overheat warning threshold, then a first-level overheat warning is triggered. If the temperature data is greater than or equal to the second overheat warning threshold, but less than the third overheat warning threshold, then a second-level overheat warning is triggered. If the temperature data is greater than or equal to the third overheat warning threshold, then a level three overheat warning is triggered; wherein the first overheat warning threshold is less than the second overheat warning threshold, and the second overheat warning threshold is less than the third overheat warning threshold.

4. The method according to claim 1, characterized in that, The step of executing the target early warning strategy based on the temperature data includes: If the temperature data is greater than or equal to the first overheat warning threshold, but less than the second overheat warning threshold, then the first warning strategy is executed; If the temperature data is greater than or equal to the second overheat warning threshold, but less than the third overheat warning threshold, then the second warning strategy is executed; If the temperature data is greater than or equal to the third overheat warning threshold, then the third warning strategy is executed; wherein the first overheat warning threshold is less than the second overheat warning threshold, and the second overheat warning threshold is less than the third overheat warning threshold.

5. The method according to claim 4, characterized in that, The overheat warning device for the quick-connect terminal also includes a cloud platform and a light display device; Accordingly, the execution of the first early warning strategy includes: The indicator light of the light display device is controlled to flash; The Level 1 warning information is sent to the cloud platform so that the cloud platform can display the Level 1 warning information.

6. The method according to claim 4, characterized in that, The overheat warning device for the quick-connect terminal also includes a cloud platform and a light display device; Accordingly, the execution of the second early warning strategy includes: The indicator light of the light display device is controlled to flash; The level-two warning information is sent to the cloud platform so that the cloud platform can display the level-two warning information; A power reduction command is sent to the energy storage system so that the energy storage system operates at reduced power according to the power reduction command.

7. The method according to claim 4, characterized in that, The overheat warning device for the quick-connect terminal also includes a cloud platform and a light display device; Accordingly, the execution of the third early warning strategy includes: The indicator light of the light display device is controlled to flash; The Level 3 warning information is sent to the cloud platform so that the cloud platform can display the Level 3 warning information; A converter shutdown command and a circuit breaker disconnect command are sent to the energy storage system so that the energy storage system shuts down the converter according to the converter shutdown command and drives the shunt trip unit of the circuit breaker to disconnect the circuit breaker according to the circuit breaker disconnect command.

8. A temperature overheat warning device for quick-connect terminals, characterized in that, A temperature overheat warning device for quick-connect terminals includes: a battery management system, quick-connect terminals, and a thermistor; wherein the thermistor is installed inside the housing of the quick-connect terminal, and the thermistor is in contact with the quick-connect terminal through a heat-conducting device; the lead wire of the thermistor is led out through a reserved channel on the housing and electrically connected to the battery management system; the device is applied to the battery management system and includes: A voltage data acquisition module is used to acquire the voltage data of the thermistor through the wire during the operation of the quick-connect terminal; The resistance data acquisition module is used to acquire the resistance data of the thermistor based on the voltage data; A temperature data acquisition module is used to acquire the temperature data of the quick-connect terminal based on the resistance data; The judgment module is used to determine whether to trigger an overheat warning based on the temperature data of the quick-connect terminal; The early warning strategy execution module is used to execute the target early warning strategy based on the temperature data if it is determined that an overheating early warning has been triggered; different temperature data correspond to different early warning strategies.

9. A battery management system, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-7.

11. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-7.

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