A safety monitoring system for lithium battery containers

Abstract

The present invention relates to a safety monitoring system for a lithium battery container, and to the technical field of lithium battery transportation. The present invention monitors the smoke concentration and temperature in a lithium battery container through a smoke and temperature sensing module, and monitors the number of times the pressure relief exhaust device on the container is opened and closed through an opening and closing counting module. The conditions in the container are monitored by collecting the smoke concentration value, temperature value, and the number of times the pressure relief exhaust device is opened and closed in the container. The abnormal conditions of the smoke concentration value and the temperature value are used to reflect the thermal runaway of the lithium battery in the container, so that corresponding treatment measures can be made in time to reduce the risk of safety accidents. Finally, the monitoring data and positioning information are sent to the safety monitoring platform to realize remote monitoring of the container. The present invention is particularly suitable for the transportation of lithium batteries in railway containers, which effectively improves the safety of lithium battery transportation and reduces potential safety risks.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery transportation, and in particular to a safety monitoring system for a lithium battery container. Background Art

[0002] Lithium batteries have the characteristics of high energy density and long service life, so they play a wide and irreplaceable role in the fields of electronics, new energy vehicles, etc. In rail transportation, lithium batteries are usually loaded in containers. During the transportation of lithium battery cargo, affected by various factors, thermal runaway may occur under certain circumstances, causing battery overheating and fire. If the abnormality of lithium batteries is not discovered in time, accidents such as combustion or explosion may occur due to untimely handling.

[0003] During the thermal runaway of lithium batteries, there will be smoke, temperature rise, and increased air pressure. Therefore, by monitoring the environment inside the container, early signs of abnormal conditions of lithium battery cargo can be monitored and warned in advance to prevent larger accidents and improve the safety and reliability of lithium battery transportation. However, at this stage, there is still a lack of monitoring technology for the environment inside special containers for lithium battery cargo transportation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a safety monitoring system for a lithium battery container to solve the above technical problem.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a safety monitoring system for a lithium battery container, a pressure relief exhaust device is installed on the container to be monitored, and the system includes: an opening and closing counting module, a smoke and temperature sensing module and a monitoring host, the opening and closing counting module and the smoke and temperature sensing module are respectively connected to the monitoring host; the opening and closing counting module is installed on the pressure relief exhaust device, and is used to monitor the opening and closing times of the pressure relief exhaust device; the smoke and temperature sensing module is installed in the container to be monitored, and is used to monitor the smoke concentration value and temperature value in the container to be monitored, and judge whether the alarm condition is met according to the smoke concentration value and the temperature value, and if so, send an alarm to the monitoring host. The monitoring host sends an alarm signal; the monitoring host is installed on the container to be monitored, the monitoring host includes a main control module, the main control module includes an alarm unit, and the alarm unit is used to poll the smoke and temperature sensing modules and the opening and closing counting module after receiving the alarm signal to obtain monitoring data; and obtain the positioning information of the container to be monitored, and send the monitoring data and the positioning information to a safety monitoring platform wirelessly connected to the monitoring host, so as to perform safety monitoring on the container to be monitored according to the monitoring data, wherein the monitoring data includes the opening and closing times of the pressure relief exhaust device, the smoke concentration value and the temperature value.

[0006] The beneficial effects of the present invention are as follows: the present invention monitors the smoke concentration and temperature in the lithium battery container through the smoke and temperature sensing modules, and monitors the number of times the pressure relief exhaust device on the container is opened and closed through the opening and closing counting module. The conditions in the container are monitored by collecting the smoke concentration values, temperature values ​​and the number of times the pressure relief exhaust device is opened and closed in the container. The monitoring host sends the monitoring data and positioning information to the safety monitoring platform to realize remote monitoring of the container, so that when the lithium battery in the container has thermal runaway, the relevant personnel can make corresponding countermeasures in time to reduce the risk of safety accidents. The present invention is particularly suitable for the transportation of lithium batteries in railway containers, which effectively improves the safety of lithium battery transportation and reduces potential safety risks.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the main control module also includes a monitoring unit, which is used to obtain the sleep time of the main control module. When the sleep time of the main control module reaches a preset first sleep time threshold, the current motion state of the container to be monitored is obtained, and the current motion state is a transport state or a stationary state; the monitoring unit is also used to obtain the duration of the current motion state of the container to be monitored, and to determine whether the duration of the current motion state of the container reaches a preset state cycle; if reached, the smoke and temperature sensing modules and the opening and closing counting module are polled to obtain monitoring data, and the positioning information of the container to be monitored is obtained, and the monitoring data and the positioning information are sent to a security monitoring platform wirelessly connected to the monitoring host, so as to perform security monitoring of the container to be monitored according to the monitoring data.

[0009] Furthermore, the state cycle includes a dynamic cycle and a static cycle, the dynamic cycle represents the duration of the container to be monitored being in a transport and moving state, and the static cycle represents the duration of the container to be monitored being in a static state; when the monitoring unit obtains the duration of the container to be monitored being in the current motion state and determines whether the duration of the container being in the current motion state reaches a preset state cycle, it is specifically used to: if the container to be monitored is in the transport and moving state, obtain the duration of the container to be monitored being in the transport and moving state, and determine whether the duration of the container to be monitored being in the transport and moving state reaches a preset dynamic cycle; if the container to be monitored is in the static state, obtain the duration of the container to be monitored being in the static state, and determine whether the duration of the container to be monitored being in the static state reaches a preset static cycle.

[0010] Furthermore, the monitoring host also includes an acceleration sensor, a timing module, a communication module and a positioning module; the acceleration sensor, the timing module, the communication module and the positioning module are respectively connected to the main control module; the acceleration sensor is used to monitor the acceleration corresponding to the container to be monitored, and the acceleration corresponding to the container to be monitored is used to reflect the current motion state of the container to be monitored; the timing module is used to record the sleep time of the monitoring host, the duration of the container to be monitored in the transport state and the duration of the container to be monitored in the static state; the communication module is used to communicate with the security monitoring platform; the positioning module is used to locate the container to be monitored.

[0011] Furthermore, the opening and closing counting module includes a first control module, a Hall element and a magnet. The first control module is connected to the monitoring host and the Hall element respectively. The Hall element is installed on the pressure relief and exhaust device, and the magnet is installed on the opening and closing plate of the pressure relief and exhaust device.

[0012] Furthermore, when monitoring the opening and closing times of the pressure relief and exhaust device, the opening and closing counting module is specifically used to update the opening and closing times of the pressure relief and exhaust device after monitoring the change in the magnetic induction intensity between the Hall element and the magnet.

[0013] Furthermore, when updating the opening and closing times of the pressure relief exhaust device, the opening and closing counting module is specifically used to: add one to the opening and closing times of the pressure relief exhaust device, and save the updated opening and closing times of the pressure relief exhaust device.

[0014] Furthermore, when monitoring the smoke concentration and temperature values ​​in the container to be monitored, the smoke and temperature sensing module is specifically used to: end the sleep state of the smoke and temperature sensing module when the sleep time of the smoke and temperature sensing module reaches a preset second sleep time threshold; obtain the interval time from the last sampling of the smoke concentration and temperature values ​​in the container to be monitored; determine whether the interval time reaches the preset sampling period, and if so, collect the smoke concentration and temperature values ​​in the container to be monitored; otherwise, enter the sleep state.

[0015] Furthermore, when the smoke and temperature sensing module determines whether the alarm condition is met based on the smoke concentration value and the temperature value, it is specifically used to: determine whether the smoke concentration value is greater than a preset smoke concentration threshold, and determine whether the temperature value is greater than a preset temperature threshold; if the smoke concentration value is greater than the smoke concentration threshold or the temperature value is greater than the temperature threshold, then obtain the duration of the smoke concentration value being higher than the smoke concentration threshold or the duration of the temperature value being higher than the temperature threshold; determine whether the duration of the smoke concentration value being higher than the smoke concentration threshold or the duration of the temperature value being higher than the temperature threshold is greater than the alarm delay time; if so, determine that the alarm condition is met; otherwise, determine that the alarm condition is not met.

[0016] Furthermore, the smoke and temperature sensing module includes a second control module, a smoke sensor and a temperature sensor. The second control module is respectively connected to the monitoring host, the smoke sensor and the temperature sensor. The smoke sensor is used to monitor the smoke concentration value in the container to be monitored, and the temperature sensor is used to monitor the temperature value in the container to be monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a safety monitoring system for a lithium battery container according to the present invention;

[0018] Figure 2 This is a working flow chart of an alarm unit of a safety monitoring system for a lithium battery container of the present invention;

[0019] Figure 3 This is a working flow chart of a monitoring unit of a safety monitoring system for a lithium battery container of the present invention;

[0020] Figure 4 This is a working diagram of an opening and closing counting module of a safety monitoring system for a lithium battery container of the present invention;

[0021] Figure 5 This is a working diagram of a smoke and temperature sensing module of a safety monitoring system for a lithium battery container of the present invention. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1As shown, this embodiment provides a safety monitoring system for a lithium battery container, wherein a pressure relief exhaust device is installed on the container to be monitored, and the system comprises: an opening and closing counting module, a smoke and temperature sensing module and a monitoring host, wherein the opening and closing counting module and the smoke and temperature sensing module are respectively connected to the monitoring host; the opening and closing counting module is installed on the pressure relief exhaust device, and is used to monitor the opening and closing times of the pressure relief exhaust device; the smoke and temperature sensing module is installed in the container to be monitored, and is used to monitor the smoke concentration value and the temperature value in the container to be monitored, and judge whether the alarm condition is met according to the smoke concentration value and the temperature value, and if so, send an alarm signal to the monitoring host; the monitoring host is installed on the container to be monitored, and the monitoring host comprises a main control module, and the main control module comprises an alarm unit, such as Figure 2 As shown, the alarm unit is used to poll the smoke and temperature sensing modules and the opening and closing counting module after receiving the alarm signal to obtain monitoring data; and obtain the positioning information of the container to be monitored, and send the monitoring data and the positioning information to a safety monitoring platform wirelessly connected to the monitoring host, so as to perform safety monitoring of the container to be monitored according to the monitoring data, wherein the monitoring data includes the opening and closing times of the pressure relief exhaust device, the smoke concentration value and the temperature value.

[0024] The main control module of the monitoring host is in sleep mode, but when the bus, i.e. the slave node, has real-time abnormal alarm data, the monitoring host immediately starts polling the slave node data and starts positioning (networking, satellite search, etc.). After positioning is completed, the data is packaged and sent to the remote security monitoring platform.

[0025] This embodiment uses a smoke and temperature sensing module to monitor the smoke concentration and temperature in the lithium battery container, and uses an opening and closing counting module to monitor the number of times the pressure relief exhaust device on the container is opened and closed. The conditions in the container are monitored by collecting the smoke concentration value, temperature value, and the number of times the pressure relief exhaust device is opened and closed in the container. The monitoring host sends the monitoring data and positioning information to the safety monitoring platform to achieve remote monitoring of the container, so that when thermal runaway occurs in the lithium battery in the container, relevant personnel can take corresponding countermeasures in time to reduce the risk of safety accidents. The present invention is particularly suitable for the transportation of lithium batteries in railway containers, which effectively improves the safety of lithium battery transportation and reduces potential safety risks.

[0026] like Figure 3As shown, optionally, in an embodiment, the main control module also includes a monitoring unit, which is used to obtain the sleep time of the main control module. When the sleep time of the main control module reaches a preset first sleep time threshold, the current motion state of the container to be monitored is obtained, and the current motion state is a transport moving state or a stationary state; the monitoring unit is also used to obtain the duration of the current motion state of the container to be monitored, and to determine whether the duration of the current motion state of the container reaches a preset state cycle; if reached, the smoke and temperature sensing modules and the opening and closing counting module are polled to obtain monitoring data, and the positioning information of the container to be monitored is obtained, and the monitoring data and the positioning information are sent to a security monitoring platform wirelessly connected to the monitoring host, so as to perform security monitoring of the container to be monitored according to the monitoring data.

[0027] The main control module of the monitoring host is in a dormant state. When it exceeds the set first dormancy time threshold, it will wake up regularly and start working. The main control module of the monitoring host will determine the current motion state of the container and whether it meets the motion-static cycle. If not, it will continue to enter dormancy. If it meets, it will proceed to the next step. The next step is to poll the slave nodes (referring to the smoke and temperature sensing modules and the opening and closing counting modules) to see if there is data that needs to be reported. After polling and recording the slave node data, the monitoring host starts positioning (networking, satellite search, etc.). After positioning is completed, the data is packaged and sent to the remote security monitoring platform.

[0028] Optionally, in an embodiment, the state cycle includes a dynamic cycle and a static cycle, the dynamic cycle represents the duration of the container to be monitored being in a transport and moving state, and the static cycle represents the duration of the container to be monitored being in a static state; when the monitoring unit obtains the duration of the current motion state of the container to be monitored and determines whether the duration of the current motion state of the container reaches a preset state cycle, it is specifically used to: if the container to be monitored is in the transport and moving state, obtain the duration of the transport and moving state of the container to be monitored, and determine whether the duration of the transport and moving state of the container to be monitored reaches a preset dynamic cycle; if the container to be monitored is in the static state, obtain the duration of the static state of the container to be monitored, and determine whether the duration of the static state of the container to be monitored reaches a preset static cycle.

[0029] Optionally, in an embodiment, the monitoring host also includes an acceleration sensor, a timing module, a communication module and a positioning module; the acceleration sensor, the timing module, the communication module and the positioning module are respectively connected to the main control module; the acceleration sensor is used to monitor the acceleration corresponding to the container to be monitored, and the acceleration corresponding to the container to be monitored is used to reflect the current motion state of the container to be monitored; the timing module is used to record the sleep time of the monitoring host, the duration of the container to be monitored in the transport state and the duration of the container to be monitored in the stationary state; the communication module is used to communicate with the security monitoring platform; the positioning module is used to locate the container to be monitored.

[0030] The monitoring host is installed on the container to be monitored, and the container to be monitored is placed on a transport vehicle for transportation. When the transport vehicle drives the container to be monitored to move or stop, the acceleration corresponding to the container to be monitored measured by the acceleration sensor in the monitoring host will change. The movement state of the container can be determined by the acceleration corresponding to the container. The transport state means that the container is in the process of transport driven by the transport vehicle; the stationary state means that the container is stationary, for example, it is placed in a warehouse or yard.

[0031] The main control module of the monitoring host can adopt 51 single-chip microcomputer, STM32 controller, etc. The monitoring host is used to control the collaborative work and calculation processing between the smoke and temperature sensing modules and the opening and closing counting modules, interact with each module, and collect, process and forward data. Therefore, the monitoring host needs to meet the requirements of low power consumption and high stability, and be able to meet the working scenarios such as sensor acquisition, positioning, and communication. It has the ability to collect its own position, acceleration, and host power, collect the smoke concentration and temperature in the box obtained by the smoke and temperature sensing modules, and collect the number of opening and closing of the pressure relief exhaust device obtained by the opening and closing counting module, and send the collected information data to the remote system platform regularly through wireless communication.

[0032] The monitoring host also includes explosion-proof batteries, composite capacitors, coulomb meters, power conversion modules, buzzers, Bluetooth modules, GSM antennas, satellite antennas, etc. The performance of the power module of the monitoring host determines the durability of the device's working ability. Therefore, the data collection cycle needs to be as dense as possible to meet the quality of remote monitoring services. On the other hand, in order to fully extend the service life of the device, the device sleep and wake-up strategy will change with the changes in the train transportation status, and the device needs to be suitable for long-term harsh outdoor environments such as low temperature, high temperature, wind and sand, so the use of capacity batteries combined with capacitors for self-powered is a better way.

[0033] The positioning module of the monitoring host is a satellite positioning module. The satellite positioning module is designed with multi-mode hybrid positioning technology, that is, the design is mainly based on Beidou-3 positioning, and is compatible with GPS, Grenas and base station positioning, supports B1C frequency, and the positioning accuracy is within 10 meters.

[0034] The communication module of the monitoring host is mainly based on 4G full network access, and is backward compatible with 2 / 3 communication standards. In the actual transportation process, considering the coverage of domestic and foreign communication base stations, the monitoring host often encounters many abnormal situations, such as being unable to find the communication network for registration, being unable to locate due to obstruction of satellite signals, and being unable to return data due to communication abnormalities during data return. Therefore, the communication module is designed to use a timeout control method. Once the relevant limit time threshold is exceeded in each link of establishing communication, the current connection is interrupted to reduce unnecessary power consumption. In order to achieve good communication effects and realize signal reception and transmission, the antenna needs to be placed outside. The outside of the monitoring host is similar in appearance to the container ventilator, and an existing container ventilator is replaced during installation.

[0035] Optionally, in an embodiment, the opening and closing counting module includes a first control module, a Hall element and a magnet, the first control module is respectively connected to the monitoring host and the Hall element, the Hall element is installed on the pressure relief exhaust device, and the magnet is installed on the opening and closing plate of the pressure relief exhaust device.

[0036] The pressure relief exhaust device includes a mounting frame, a metal mesh and an opening and closing plate. The mounting frame is connected to the side wall of the container, the edge of the metal mesh is connected to the mounting frame, and the opening and closing plate is hinged to the mounting frame. The Hall element can be fixedly connected to the mounting frame or the metal mesh, and the magnet is connected to the side of the opening and closing plate facing the metal mesh. When the pressure in the container reaches a certain level, the pressure relief exhaust device opens, that is, the opening and closing plate opens to balance the internal and external pressures. When the opening and closing plate opens, the distance between the Hall element and the magnet increases, resulting in a decrease in the magnetic induction intensity between the Hall element and the magnet. Based on the Hall detection principle, the change in magnetic induction intensity brings about a voltage change, which can monitor the opening and closing times of the pressure relief exhaust device by one.

[0037] Optionally, in an embodiment, when monitoring the opening and closing times of the pressure relief exhaust device, the opening and closing counting module is specifically used to: update the opening and closing times of the pressure relief exhaust device after monitoring the change in the magnetic induction intensity between the Hall element and the magnet.

[0038] like Figure 4 As shown, optionally, in an embodiment, when updating the opening and closing times of the pressure relief exhaust device, the opening and closing counting module is specifically used to: add one to the opening and closing times of the pressure relief exhaust device, and save the updated opening and closing times of the pressure relief exhaust device.

[0039] The opening and closing counting module is in a dormant state. When the pressure inside the container is greater than a certain value, the pressure relief exhaust device is opened, and the Hall element of the opening and closing counting module records the opening, the opening and closing times are increased by one and the data is saved. After the recording is completed, the opening and closing counting module enters a dormant state. The air pressure inside the container increases, and the pressure relief exhaust device is opened. Therefore, by monitoring the opening and closing times of the pressure relief exhaust device, it can be known that the pressure relief exhaust device has been opened, and the air pressure inside the container increases before the pressure relief exhaust device is opened.

[0040] like Figure 5 As shown, optionally, in an embodiment, when the smoke and temperature sensing module monitors the smoke concentration value and the temperature value in the container to be monitored, it is specifically used to: when the sleep time of the smoke and temperature sensing module reaches a preset second sleep time threshold, end the sleep state of the smoke and temperature sensing module; obtain the interval time from the last sampling of the smoke concentration value and the temperature value in the container to be monitored; determine whether the interval time reaches the preset sampling period, if so, collect the smoke concentration value and the temperature value in the container to be monitored; otherwise, enter the sleep state.

[0041] Optionally, in an embodiment, when the smoke and temperature sensing module determines whether the alarm condition is met according to the smoke concentration value and the temperature value, it is specifically used to: determine whether the smoke concentration value is greater than the preset smoke concentration threshold, and determine whether the temperature value is greater than the preset temperature threshold. If the smoke concentration value is greater than the smoke concentration threshold or the temperature value is greater than the temperature threshold, then obtain the duration of the smoke concentration value being higher than the smoke concentration threshold or the duration of the temperature value being higher than the temperature threshold; determine whether the duration of the smoke concentration value being higher than the smoke concentration threshold or the duration of the temperature value being higher than the temperature threshold is greater than the alarm delay time. If it is greater, it is determined that the alarm condition is met, otherwise, it is determined that the alarm condition is not met. The smoke and temperature sensing module is in a dormant state and starts working after exceeding the set second dormancy time threshold. First, it will detect whether the sampling period (smoke concentration and temperature sampling time) meets the time requirement. The sampling period is the preset interval between two data collections. If it does not meet the requirement, it will continue to sleep. If it meets the time requirement, it will proceed to the next step. The smoke and temperature sensing modules will collect the smoke concentration and temperature values ​​of the environment at that time, and compare the data with the established threshold. If it does not exceed the threshold, it will continue to sleep. If it exceeds the threshold, it will record the alarm status and accumulate time. The purpose of accumulating time is to avoid reporting to the monitoring host immediately to prevent false alarms. Therefore, it is recorded whether the accumulated time exceeds the preset alarm delay time. If it does not exceed, the alarm will not be recorded and enter sleep. If it exceeds, the alarm data will be sent to the monitoring host.

[0042] Optionally, in an embodiment, the smoke and temperature sensing module includes a second control module, a smoke sensor and a temperature sensor, the second control module is respectively connected to the monitoring host, the smoke sensor and the temperature sensor, the smoke sensor is used to monitor the smoke concentration value in the container to be monitored, and the temperature sensor is used to monitor the temperature value in the container to be monitored.

[0043] The second control module is connected to the main control module of the monitoring host through a wired connection. The smoke sensor is based on the photoelectric principle. When smoke enters the smoke sensor, the smoke particles will scatter and absorb the light, causing the light intensity to weaken, thereby detecting the presence of smoke. The temperature sensor is based on the thermistor method and can sense temperature changes.

[0044] The number of smoke and temperature sensing modules can be reasonably set according to the size of the space in the container. Each smoke and temperature sensing module is dispersedly installed on the upper side of the container to ensure effective monitoring of the smoke, fog and temperature in the container. When at least two smoke and temperature sensing modules are provided, each smoke and temperature sensing module is independent of each other. As long as there is a smoke and temperature sensing module that meets the alarm condition, an alarm message is sent to the monitoring host, and the monitoring host enters the alarm process. When at least two smoke and temperature sensing modules are provided, it is necessary to set a number for each smoke and temperature sensing module. When sending data to the monitoring host, each smoke and temperature sensing module is distinguished by the number.

[0045] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A safety monitoring system for a lithium battery container, characterized in that: A pressure relief exhaust device is installed on the container to be monitored. The system includes: an opening and closing counting module, a smoke and temperature sensing module and a monitoring host. The opening and closing counting module and the smoke and temperature sensing module are respectively connected to the monitoring host. The opening and closing counting module is installed on the pressure relief exhaust device and is used to monitor the opening and closing times of the pressure relief exhaust device; The smoke and temperature sensing module is installed in the container to be monitored, and is used to monitor the smoke concentration value and temperature value in the container to be monitored, and judge whether the alarm condition is met according to the smoke concentration value and the temperature value, and if so, send an alarm signal to the monitoring host; The monitoring host is installed on the container to be monitored, and the monitoring host includes a main control module, and the main control module includes an alarm unit. The alarm unit is used to poll the smoke and temperature sensing modules and the opening and closing counting modules after receiving the alarm signal to obtain monitoring data; and obtain the positioning information of the container to be monitored, and send the monitoring data and the positioning information to a safety monitoring platform wirelessly connected to the monitoring host, so as to perform safety monitoring on the container to be monitored according to the monitoring data, wherein the monitoring data includes the opening and closing times of the pressure relief exhaust device, the smoke concentration value and the temperature value; The main control module further includes a monitoring unit, which is used to obtain the sleep time of the main control module, and when the sleep time of the main control module reaches a preset first sleep time threshold, obtain the current motion state of the container to be monitored, wherein the current motion state is a transport moving state or a stationary state; The monitoring unit is also used to obtain the duration of the container to be monitored being in the current motion state, and to determine whether the duration of the container to be monitored being in the current motion state reaches a preset state cycle; if reached, the smoke and temperature sensing modules and the opening and closing counting module are polled to obtain monitoring data, and the positioning information of the container to be monitored is obtained, and the monitoring data and the positioning information are sent to a security monitoring platform wirelessly connected to the monitoring host, so as to perform security monitoring on the container to be monitored according to the monitoring data; The state cycle includes a dynamic cycle and a static cycle, wherein the dynamic cycle represents the duration of the container to be monitored being in a transport state, and the static cycle represents the duration of the container to be monitored being in a static state; when the monitoring unit obtains the duration of the container to be monitored being in the current motion state and determines whether the duration of the container being in the current motion state reaches a preset state cycle, it is specifically used to: If the container to be monitored is in the transport state, the duration of the container to be monitored being in the transport state is obtained, and it is determined whether the duration of the container to be monitored being in the transport state reaches a preset dynamic cycle; If the container to be monitored is in the static state, the duration of the container to be monitored being in the static state is obtained, and it is determined whether the duration of the container to be monitored being in the static state reaches a preset static period.

2. A safety monitoring system for a lithium battery container according to claim 1, characterized in that: The monitoring host also includes an acceleration sensor, a timing module, a communication module and a positioning module; the acceleration sensor, the timing module, the communication module and the positioning module are respectively connected to the main control module; The acceleration sensor is used to monitor the acceleration corresponding to the container to be monitored, and the acceleration corresponding to the container to be monitored is used to reflect the current motion state of the container to be monitored; The timing module is used to record the sleep time of the monitoring host, the duration of the container to be monitored being in the transport state, and the duration of the container to be monitored being in the stationary state; The communication module is used to communicate with the security monitoring platform; The positioning module is used to position the container to be monitored.

3. A safety monitoring system for a lithium battery container according to claim 1, characterized in that: The opening and closing counting module includes a first control module, a Hall element and a magnet. The first control module is connected to the monitoring host and the Hall element respectively. The Hall element is installed on the pressure relief and exhaust device, and the magnet is installed on the opening and closing plate of the pressure relief and exhaust device.

4. A safety monitoring system for a lithium battery container according to claim 3, characterized in that: When monitoring the opening and closing times of the pressure relief exhaust device, the opening and closing counting module is specifically used to update the opening and closing times of the pressure relief exhaust device after monitoring the change in the magnetic induction intensity between the Hall element and the magnet.

5. A safety monitoring system for a lithium battery container according to claim 4, characterized in that: When updating the opening and closing times of the pressure relief exhaust device, the opening and closing counting module is specifically used to: add one to the opening and closing times of the pressure relief exhaust device, and save the updated opening and closing times of the pressure relief exhaust device.

6. A safety monitoring system for a lithium battery container according to claim 1, characterized in that: When monitoring the smoke concentration and temperature value in the container to be monitored, the smoke and temperature sensing module is specifically used to: When the sleep time of the smoke and temperature sensing module reaches a preset second sleep time threshold, the sleep state of the smoke and temperature sensing module is terminated; Obtaining the interval time since the last sampling of the smoke concentration value and temperature value in the container to be monitored; It is determined whether the interval time reaches a preset sampling period. If so, the smoke concentration value and temperature value in the container to be monitored are collected; otherwise, the system enters a dormant state.

7. A safety monitoring system for a lithium battery container according to claim 1, characterized in that: When the smoke and temperature sensing module determines whether the alarm condition is met according to the smoke concentration value and the temperature value, it is specifically used to: Determine whether the smoke concentration value is greater than a preset smoke concentration threshold, and determine whether the temperature value is greater than a preset temperature threshold; if the smoke concentration value is greater than the smoke concentration threshold or the temperature value is greater than the temperature threshold, obtain a duration of the smoke concentration value being higher than the smoke concentration threshold or a duration of the temperature value being higher than the temperature threshold; Determine whether the duration that the smoke concentration value is higher than the smoke concentration threshold or the duration that the temperature value is higher than the temperature threshold is greater than the alarm delay time; if so, determine that the alarm condition is met; otherwise, determine that the alarm condition is not met.

8. A safety monitoring system for a lithium battery container according to claim 1, characterized in that: The smoke and temperature sensing module includes a second control module, a smoke sensor and a temperature sensor. The second control module is connected to the monitoring host, the smoke sensor and the temperature sensor respectively. The smoke sensor is used to monitor the smoke concentration value in the container to be monitored, and the temperature sensor is used to monitor the temperature value in the container to be monitored.

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