Lithium battery storage temperature monitoring system

Abstract

A lithium battery storage temperature monitoring system. The lithium battery storage temperature monitoring system comprises: a controller and an infrared thermal imaging device, wherein the controller is in communication connection with the infrared thermal imaging device; the infrared thermal imaging device is used for acquiring temperature information of lithium batteries on a lithium battery shelf, and sending same to the controller; and the controller is used for determining, on the basis of the temperature information corresponding to the lithium battery shelf, a lithium battery that has a thermal runaway precursor on the lithium battery shelf, and performing emergency handling.

Description

Lithium battery storage temperature monitoring system

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202410922809.3, filed on July 8, 2024, entitled "Lithium Battery Storage Temperature Monitoring System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of lithium battery warehouse storage, and more specifically, to a lithium battery warehouse temperature monitoring system. Background Technology

[0004] In related technologies, lithium battery shelf temperature monitoring is achieved based on distributed temperature-sensing optical fibers installed on the lithium battery shelves. These fibers utilize the back-spreading Raman dispersion effect, measuring changes in the external temperature of the fiber by analyzing changes in the intensity of anti-Stokes light within the fiber, thereby enabling temperature monitoring of the lithium batteries on the shelf. However, this method is limited by the size of the lithium batteries, making it unable to detect the temperature of small-sized lithium batteries on the shelf. Furthermore, it is affected by the ambient air environment where lithium batteries may experience thermal runaway, thus failing to effectively detect the actual temperature of the lithium batteries. Summary of the Invention

[0005] The purpose of this disclosure is to provide a lithium battery storage temperature monitoring system that can quickly, efficiently and accurately monitor the temperature of lithium batteries on lithium battery shelves.

[0006] To achieve the above objectives, this disclosure provides a lithium battery storage temperature monitoring system, comprising: a controller and an infrared thermal imaging device, wherein the controller is communicatively connected to the infrared thermal imaging device, and the detection area of ​​the infrared thermal imaging device covers the lithium battery shelf;

[0007] The infrared thermal imaging device is used to acquire the temperature information of the lithium batteries in the lithium battery shelf and send it to the controller;

[0008] The controller is used to determine, based on the temperature information corresponding to the lithium battery shelf, the lithium battery that shows signs of impending thermal runaway on the lithium battery shelf, and to perform emergency handling.

[0009] The above technical solution uses infrared thermal imaging equipment to acquire temperature information of lithium batteries in the lithium battery storage area. A controller connected to the infrared thermal imaging equipment identifies lithium batteries showing signs of impending thermal runaway based on this temperature information and initiates emergency response. Monitoring the temperature of lithium batteries in the storage area using infrared thermal imaging equipment enables rapid, efficient, and accurate temperature measurement. This non-contact, rapid temperature measurement is not limited by battery size or shelf type, improving the initial fire detection capability in lithium battery storage and offering broad applicability.

[0010] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 is a schematic diagram of a lithium battery storage temperature monitoring system according to an exemplary embodiment of the present disclosure.

[0013] Figure 2 is a schematic diagram of an existing lithium battery storage temperature monitoring system.

[0014] Figure 3a is a schematic diagram showing the installation location of an infrared thermal imaging device according to an exemplary embodiment of the present disclosure.

[0015] Figure 3b is another schematic diagram showing the installation location of an infrared thermal imaging device according to an exemplary embodiment of the present disclosure.

[0016] Figure 4 is another schematic diagram of a lithium battery storage temperature monitoring system according to an exemplary embodiment of the present disclosure.

[0017] Figure 5 is a flowchart illustrating the operation of a lithium battery storage temperature monitoring system according to an exemplary embodiment of the present disclosure.

[0018] Explanation of reference numerals in the attached diagram: 1. Infrared thermal imaging temperature monitoring platform; 2. Infrared thermal imaging equipment; 3. Lithium battery shelf; 301. Shelf upright; 302. Shelf beam; 303. Battery tray; 4. Switch; 5. Display device; 6. Ambient temperature sampling device; 7. Fire protection system; 8. Fire extinguishing equipment. Detailed Implementation

[0019] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0020] In related technologies, there is a distributed fiber optic temperature measurement lithium battery storage temperature monitoring system, as shown in Figure 2. The system includes battery storage temperature monitoring software, a distributed fiber optic temperature measurement host, a fire alarm, and a temperature-sensing fiber optic cable. The distributed fiber optic temperature measurement host is communicatively connected to the battery storage temperature monitoring software, the fire alarm, and the temperature-sensing fiber optic cable. The temperature-sensing fiber optic cable is suspended below the top plate of the lithium battery shelf. The distributed temperature-sensing fiber optic cable detects the temperature of the lithium batteries in each compartment of the lithium battery shelf, so as to trigger an alarm through the fire alarm when the lithium battery shows signs of thermal runaway.

[0021] The inventors discovered the following technical defects in this technology:

[0022] 1. The temperature measurement principle of DTS (Distributed Temperature Sensing) is based on the backscattering Raman effect. It measures the change in external temperature of the fiber by analyzing the change in the intensity of anti-Stokes light in the fiber. However, it has certain requirements for spatial resolution, generally requiring a spatial resolution ≥ 0.5 meters. Higher spatial resolution will be accompanied by higher cost and technical complexity.

[0023] 2. Because lithium batteries are only stored on the shelf for a short time, and the distributed temperature sensing fiber is set under the top plate of the lithium battery shelf, it cannot be directly attached to the object being measured for temperature detection, resulting in low reliability of the detection results.

[0024] 3. For open-style lithium battery racks, the vertical and horizontal spaces of the compartments are interconnected, and the airflow between compartments is good. When a lithium battery experiences thermal runaway, the released heat will cause the surrounding air to expand, the air density to decrease, and it will rise, unable to converge around the temperature-sensing optical fiber. Due to the influence of the air environment during the thermal runaway of the lithium battery, the DTS cannot effectively detect the actual temperature of the lithium battery.

[0025] 4. For small-sized lithium batteries, such as some lithium batteries with a minimum width of 13.5 mm, the heat that precedes thermal runaway in such small-sized lithium batteries cannot cause a significant temperature rise in the 0.5-meter-long temperature-sensing optical fiber, making it impossible to detect the temperature of small-sized lithium batteries on the shelf.

[0026] In view of this, the present disclosure provides a lithium battery storage temperature monitoring system that can quickly, efficiently and accurately monitor the temperature of lithium batteries on lithium battery shelves.

[0027] Figure 1 is a schematic diagram of a lithium battery storage temperature monitoring system according to an exemplary embodiment of the present disclosure. As shown in Figure 1, the lithium battery storage temperature monitoring system may include: a controller and an infrared thermal imaging device, wherein the controller is communicatively connected to the infrared thermal imaging device, and the detection area of ​​the infrared thermal imaging device covers all lithium battery shelves;

[0028] Multiple infrared thermal imaging devices are used to acquire temperature information of lithium batteries in the lithium battery shelf and transmit it to the controller;

[0029] The controller is used to identify lithium batteries on the lithium battery shelf that show signs of impending thermal runaway based on the temperature information corresponding to the lithium battery shelf, and to perform emergency treatment.

[0030] It is worth noting that when a lithium battery shows signs of impending thermal runaway, its temperature will change. According to Stefan Boltzmann's law (i.e., the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature: E = σT),... 4 As temperature rises, lithium batteries radiate stronger infrared energy. Infrared thermal imaging equipment can capture the infrared radiation energy on the surface of lithium batteries and convert it into corresponding temperature data. It can quickly capture temperature changes and distribution throughout the detection area and provide accurate data information (such as single-point temperature, multi-point temperature, and temperature point coordinates). It is not limited by the type of lithium battery shelving and can quickly measure the heating temperature of smaller lithium batteries. It can detect abnormalities in a timely manner, thereby improving the early fire detection capability of lithium batteries in the storage process, gaining more fire advance time, helping users to take timely measures to prevent losses, and greatly reducing the possibility of property damage.

[0031] For example, as shown in Figure 4, when the controller is an infrared thermal imaging temperature monitoring platform 1, the infrared thermal imaging temperature monitoring platform 1 communicates with the infrared thermal imaging device 2 through a switch 4. The total measurement area of ​​the infrared thermal imaging device 2 covers the lithium battery shelf 3. The infrared thermal imaging device 2 captures the infrared radiation energy on the surface of the lithium batteries in the lithium battery shelf 3 and converts it into temperature information. It then forwards the temperature information to the infrared thermal imaging temperature monitoring platform 1 through the switch 4. Based on the temperature information corresponding to the lithium battery shelf 3, the infrared thermal imaging temperature monitoring platform 1 identifies the lithium batteries on the lithium battery shelf 3 that show signs of impending thermal runaway and performs emergency treatment.

[0032] In this embodiment, infrared thermal imaging equipment is used to acquire the surface temperature distribution of lithium batteries in the lithium battery storage area in real time. This allows for the acquisition of a large amount of temperature data in a short period, enabling rapid, efficient, and accurate temperature measurement. It achieves non-contact, rapid temperature measurement and is not limited by lithium battery size or shelf type, thus improving measurement speed and accuracy and broadening its applicability. The controller identifies lithium batteries showing signs of impending thermal runaway based on the temperature information corresponding to each lithium battery shelf and performs emergency handling, improving the initial fire detection capability in the lithium battery storage process and enabling real-time and rapid monitoring of initial fire conditions in lithium battery storage.

[0033] To help those skilled in the art better understand the lithium battery storage temperature monitoring system provided in this disclosure, a detailed description is provided below.

[0034] In one feasible implementation, there are multiple infrared thermal imaging devices, and the controller is communicatively connected to each of the multiple infrared thermal imaging devices. The total detection area of ​​the multiple infrared thermal imaging devices covers all lithium battery racks.

[0035] For example, as shown in Figure 4, when the controller is an infrared thermal imaging temperature monitoring platform 1, the infrared thermal imaging temperature monitoring platform 1 communicates with multiple infrared thermal imaging devices 2 through a switch 4. The total detection area of ​​the multiple infrared thermal imaging devices 2 covers all lithium battery shelves 3. The multiple infrared thermal imaging devices 2 capture the infrared radiation energy on the surface of lithium batteries in each compartment of each lithium battery shelf 3 and convert it into temperature information. The temperature information is then forwarded to the infrared thermal imaging temperature monitoring platform 1 through the switch 4. Based on the temperature information corresponding to each lithium battery shelf 3, the infrared thermal imaging temperature monitoring platform 1 determines the lithium batteries on each lithium battery shelf 3 that show signs of impending thermal runaway and performs emergency treatment.

[0036] In one feasible implementation, a first number of infrared thermal imaging devices are respectively installed on the shelf beams or shelf columns of the first lithium battery shelf. The detection direction of the first number of infrared thermal imaging devices is towards the second lithium battery shelf, the detection range of each infrared thermal imaging device covers multiple compartments on the second lithium battery shelf, and the detection range of the first number of infrared thermal imaging devices covers the second lithium battery shelf.

[0037] The second lithium battery shelf is equipped with a second number of infrared thermal imaging devices on its beams or uprights. The detection direction of the second number of infrared thermal imaging devices is towards the third lithium battery shelf. The detection range of each infrared thermal imaging device covers multiple compartments on the third lithium battery shelf, and the detection range of the second number of infrared thermal imaging devices covers the third lithium battery shelf.

[0038] It is worth noting that, for ease of installation, the infrared thermal imaging equipment is preferably thin, such as a card-type device. The first and second quantities can be determined based on the detection range of each infrared thermal imaging device, or can be preset according to the temperature detection accuracy requirements; this disclosure does not limit this. In the embodiments of this disclosure, the number and location of infrared thermal imaging devices on each lithium battery shelf are determined based on the detection surface size of the lithium battery shelf and the detection range of each infrared thermal imaging device, to ensure that the total detection range of all infrared thermal imaging devices covers all lithium battery shelves.

[0039] It is worth noting that the detection ranges of the first or second number of infrared thermal imaging devices may partially overlap, edge overlap, or not overlap. In this embodiment of the present disclosure, non-overlapping or edge overlap is preferred, so that the total detection range of the minimum number of infrared thermal imaging devices can cover all lithium battery racks, thereby reducing installation costs.

[0040] For example, as shown in Figure 3a, taking two lithium battery shelves with a detection surface size of 1.15m × 0.375m as an example, each lithium battery shelf includes shelf uprights 301, shelf beams 302, and battery trays 303. The shelf uprights 301 and shelf beams 302 form a storage compartment, and each storage compartment contains one battery tray 303, which is used to place lithium batteries. Both row A and row B shelves are open lithium battery shelves 3, and each battery tray 303 on both shelves stores lithium batteries (the lithium batteries stored on row B shelf are not shown). The placement of row A and row B shelves is shown in Figure 3a, according to the lithium battery storage... The detection surface size of the racks and the detection range of each infrared thermal imaging device are determined. Four infrared thermal imaging devices 2 are installed on the middle rack upright 301 facing the A rack on the B rack. The detection range of each infrared thermal imaging device 2 on the B rack covers multiple storage locations on the A rack, and the total detection area of ​​the four infrared thermal imaging devices 2 covers the A rack. Correspondingly, four infrared thermal imaging devices 2 are also installed on the middle rack upright 301 facing the B rack on the A rack. The detection range of each infrared thermal imaging device 2 on the A rack covers multiple storage locations on the B rack, and the total detection area of ​​the four infrared thermal imaging devices 2 covers the B rack. Temperature monitoring of the A rack is performed using the thermal imaging devices installed on the B rack, and vice versa.

[0041] For example, as shown in Figure 3b, taking a lithium battery shelf with three detection surfaces measuring 1.15m × 0.375m as an example, each lithium battery shelf includes shelf uprights 301, shelf beams 302, and battery trays 303. The shelf uprights 301 and shelf beams 302 form a storage compartment, and each storage compartment contains one battery tray 303, which is used to hold lithium batteries. The A-row, B-row, and C-row shelves are all open lithium battery shelves 3, and each battery tray 303 on the three shelves stores lithium batteries (the lithium batteries stored on the B-row and C-row shelves are not shown). The placement of the A-row, B-row, and C-row shelves is shown in Figure 3b. Based on the detection surface size of the lithium battery shelves and the detection range of each infrared thermal imaging device, the middle shelf upright 301 on the B-row shelf facing the A-row shelf is placed on... Four infrared thermal imaging devices 2 are installed. Each infrared thermal imaging device 2 on the B-row shelf has a detection range covering multiple storage locations on the A-row shelf, and the total detection area of ​​the four infrared thermal imaging devices 2 covers the A-row shelf. Similarly, four infrared thermal imaging devices 2 are installed on the intermediate shelf uprights 301 of the B-row shelf facing the C-row shelf, with each infrared thermal imaging device 2 on the B-row shelf having a detection range covering multiple storage locations on the C-row shelf, and the total detection area of ​​the four infrared thermal imaging devices 2 covering the C-row shelf. Likewise, four infrared thermal imaging devices 2 are installed on the intermediate shelf uprights 301 of either the A-row or C-row shelf facing the B-row shelf, with each infrared thermal imaging device 2 on the A-row or C-row shelf having a detection range covering multiple storage locations on the B-row shelf, and the total detection area of ​​the four infrared thermal imaging devices 2 covering the B-row shelf. Temperature monitoring of the A-row and C-row shelves is performed using thermal imaging devices installed on the A-row and C-row shelves, and temperature monitoring of the B-row shelf is performed using thermal imaging devices installed on the A-row and C-row shelves.

[0042] Accordingly, when the A, B, C, and D rows of shelves are arranged parallel to each other and aligned sequentially, infrared thermal imaging equipment can be installed on the B and C rows (the two middle shelves) according to the installation position of the infrared thermal imaging equipment on the B row shelf as shown in Figure 3b above. Infrared thermal imaging equipment is not installed on the A and B rows (the remaining two shelves). Temperature monitoring of the A and C rows is performed using thermal imaging equipment installed on the B row shelf in different orientations, and temperature monitoring of the B and D rows is performed using thermal imaging equipment installed on the C row shelf in different orientations.

[0043] In one feasible implementation, the detection range of each infrared thermal imaging device is determined as follows:

[0044] Determine the field of view of the infrared thermal imaging device and the distance between the infrared thermal imaging device and the object it is detecting;

[0045] The detection range of the infrared thermal imaging equipment is determined based on the field of view and distance.

[0046] For example, determine the field of view of the infrared thermal imaging device and the distance between the infrared thermal imaging device and the object it is detecting. Substitute the field of view and distance into the following formula to obtain the detection range of the infrared thermal imaging device. The formula is:

[0047] Where A represents the detection range of the infrared thermal imaging device, d represents the distance between the infrared thermal imaging device and the object it is detecting, and θ represents the field of view of the infrared thermal imaging device.

[0048] As shown in the above calculation formula, under the same conditions, the detection range of an infrared thermal imaging device can be adjusted by changing its field of view or the distance between it and the object it is detecting. For example, increasing the field of view or the distance between the infrared thermal imaging device and the object it is detecting expands the detection range; decreasing the field of view or the distance between the infrared thermal imaging device and the object it is detecting reduces the detection range.

[0049] It should be understood that the larger the detection range of an external thermal imaging device, the lower the accuracy of its detection results. Therefore, the detection range of the external thermal imaging device can be adjusted according to the detection accuracy.

[0050] In one feasible implementation, the temperature information includes the temperature of the lithium batteries in the lithium battery shelf;

[0051] The controller is used to compare the temperature of each lithium battery on the lithium battery shelf with the target temperature threshold. When the temperature of a lithium battery exceeds the target temperature threshold, it determines that the lithium battery is showing signs of thermal runaway.

[0052] For example, the controller compares the temperature of each lithium battery with a target temperature threshold. When the temperature of a lithium battery exceeds the target temperature threshold, it determines that the lithium battery is showing signs of impending thermal failure, thereby quickly and accurately identifying each lithium battery on the shelf that is showing signs of impending thermal failure.

[0053] In one feasible embodiment, the lithium battery storage temperature monitoring system may further include an ambient temperature sampling device, which includes a temperature sensor and a temperature control unit, and the temperature control unit is communicatively connected to the temperature sensor and the controller, respectively.

[0054] A temperature sensor is used to sample the current ambient temperature, obtain a temperature sampling signal, and transmit the temperature sampling signal to the temperature control unit.

[0055] The temperature control unit is used to obtain the target temperature threshold based on the temperature sampling signal and send the target temperature threshold to the controller.

[0056] For example, as shown in Figure 4, the lithium battery storage temperature detection system also includes an ambient temperature sampling device 6, which is communicatively connected to the infrared thermal imaging temperature monitoring platform 1. The temperature sensor in the ambient temperature sampling device 6 samples the current ambient temperature of the lithium battery shelf to obtain a temperature sampling signal. The temperature host in the ambient temperature sampling device 6 obtains the target temperature threshold based on the temperature sampling signal and sends the target temperature threshold to the infrared thermal imaging temperature monitoring platform 1 in the form of an equivalent digital signal.

[0057] In this embodiment, the temperature threshold can be automatically adjusted according to changes in ambient temperature, avoiding false alarms in the lithium battery storage temperature detection system due to seasonal or ambient temperature changes, thereby improving the stability and accuracy of the lithium battery storage temperature detection system and ensuring the reliability of alarms.

[0058] In one feasible implementation, the temperature host is used to reduce the initial temperature threshold to obtain the target temperature threshold when the temperature sampling signal characterizes the ambient temperature as reaching a preset first threshold.

[0059] When the ambient temperature represented by the temperature sampling signal reaches a preset second threshold, the initial temperature threshold is increased to obtain the target temperature threshold.

[0060] It is worth noting that the preset first threshold and the preset second threshold can be preset based on seasonal temperature or ambient temperature, and this disclosure does not limit this. Whether a seasonal change or an ambient temperature change has occurred can be determined based on the preset first threshold and the preset second threshold. For example, if the temperature sampling signal indicates that the ambient temperature has reached the preset first threshold, and the seasonal change is determined to be winter or the ambient temperature is decreasing, the initial temperature threshold is lowered to obtain the target temperature threshold; if the temperature sampling signal indicates that the ambient temperature has reached the preset second threshold, and the seasonal change is determined to be summer or the ambient temperature is increasing, the initial temperature threshold is increased to obtain the target temperature threshold.

[0061] It is worth noting that the initial temperature threshold can be gradually decreased or increased based on the user-defined or system default temperature adjustment step size.

[0062] For example, when lithium batteries are moved from high-temperature regions (such as tropical or subtropical areas) to low-temperature regions (such as the Antarctic, Arctic, or near-polar regions), the ambient temperature may drop from above 0°C to below 0°C. If the temperature threshold is not adjusted, an alarm signal may not be triggered when the lithium battery shows signs of impending thermal runaway. Therefore, the temperature threshold needs to be lowered. Conversely, when lithium batteries are moved from low-temperature regions to high-temperature regions, the temperature threshold needs to be increased.

[0063] For example, if the lithium battery storage location changes to winter, the ambient temperature may drop from above 0°C to below 0°C. If the temperature threshold is not adjusted, the alarm signal may not be triggered when the lithium battery shows signs of thermal runaway. Therefore, the temperature threshold needs to be lowered. Conversely, if the lithium battery storage location changes to summer, the temperature threshold needs to be increased.

[0064] In one feasible implementation, the lithium battery storage temperature monitoring system further includes a display device that is communicatively connected to the controller;

[0065] The controller is used to generate thermal image information of the lithium batteries in the lithium battery shelf based on the temperature information of each lithium battery on the shelf, and to control the display device to display the thermal image information.

[0066] For example, as shown in Figure 4, the lithium battery storage temperature monitoring system also includes a display device 5, which is communicatively connected to the infrared thermal imaging temperature monitoring platform 1. The infrared temperature monitoring platform generates thermal image information of the lithium batteries in the lithium battery shelf 3 according to the temperature information of each lithium battery on the lithium battery shelf 3, and controls the display device 5 to display the thermal image information.

[0067] In this embodiment of the disclosure, the thermal image information of each lithium battery shelf is displayed through a display device, allowing users to intuitively observe the temperature status of each lithium battery, thereby processing the data and facilitating user interaction, operation, and judgment.

[0068] In one feasible implementation, the controller is used to activate a first-level emergency measure when a lithium battery shows signs of impending thermal runaway on the lithium battery shelf, and to activate a second-level emergency measure if the first-level emergency measure fails.

[0069] In this embodiment, two levels of emergency measures are preset. The first level of emergency measures is activated based on the location information, and the second level of emergency measures is activated when the first level of emergency measures fails. When the lithium battery shows signs of thermal runaway, the corresponding emergency measures can be activated, realizing intelligent emergency response when the lithium battery shows signs of thermal runaway, which greatly reduces the losses caused by the thermal runaway of the lithium battery.

[0070] The first-level emergency measure in this disclosure may be to issue an alarm and notify maintenance personnel; it may also be to transfer lithium batteries showing signs of thermal runaway by controlling a stacking robot linked to the lithium battery storage temperature monitoring system; or it may be to control the stacking robot to transfer lithium batteries showing signs of thermal runaway while issuing an alarm and notifying maintenance personnel.

[0071] In one feasible implementation, the controller is used to generate location information when a lithium battery showing signs of impending thermal runaway appears on the lithium battery shelf, send the location information to maintenance personnel and issue an alarm, so that maintenance personnel can handle the lithium battery showing signs of impending thermal runaway based on the location information.

[0072] For example, as shown in Figure 3a, when a lithium battery showing signs of impending thermal runaway appears in shelf A and / or shelf B, the controller generates the location coordinates of all lithium batteries showing signs of impending thermal runaway and sends all location coordinates as location information to the maintenance personnel's terminal device or control display device to display the location information for the maintenance personnel to view, and issues an alarm so that the maintenance personnel can deal with the lithium batteries showing signs of impending thermal runaway in a timely manner based on the location information.

[0073] In one feasible implementation, the controller can issue an alarm in at least one of the following ways:

[0074] It triggers the speaker to play alarm audio, controls the indicator lights to flash, and pushes alarm text to the maintenance personnel's terminal equipment.

[0075] It should be understood that the controller may issue alarms in ways including but not limited to triggering the speaker to play alarm audio, controlling the indicator light to flash, and pushing alarm text to the maintenance personnel's terminal equipment.

[0076] In this embodiment of the invention, when a lithium battery shows signs of impending thermal runaway, multiple alarm methods can be used to alert maintenance personnel, thereby improving the effectiveness of fire response.

[0077] In one feasible implementation, the controller generates location information when a lithium battery exhibits signs of impending thermal runaway on the lithium battery shelf, and sends the location information to a stacking robot so that the stacking robot can transfer the lithium battery exhibiting signs of impending thermal runaway to a predetermined safe area based on the location information.

[0078] For example, as shown in Figure 3a, when a lithium battery showing signs of thermal runaway appears in shelf A and / or shelf B, the controller generates the position coordinates of all lithium batteries showing signs of thermal runaway in shelf A and / or shelf B, and sends them as position information to the stacking robot. The stacking robot is automatically dispatched to the corresponding location coordinates, grabs the lithium battery showing signs of thermal runaway, and quickly transfers it to a predetermined safe area to isolate the fire source.

[0079] In this embodiment, by linking with a stacking robot, the control of lithium battery thermal runaway is rapidly responded to. When a lithium battery showing signs of impending thermal runaway is detected on the shelf, it is quickly transferred to a predetermined safe area to reduce the risk of fire spread.

[0080] In one feasible implementation, the lithium battery storage temperature monitoring system also includes a fire detector, which is communicatively connected to the controller;

[0081] Fire detectors are used to detect fire information in the lithium battery rack;

[0082] The controller is used to determine whether a fire has occurred based on the fire information of the lithium battery shelf when the first-level emergency measures are activated, and to determine that the first-level emergency measures are invalid if the fire information indicates that a fire has occurred.

[0083] It is worth noting that the fire detector can be a smoke detector or a heat detector, and this disclosure does not limit it.

[0084] For example, after activating the first-level emergency measures, the controller combines location information and fire detection information from fire detectors to determine whether a fire has occurred. If a fire has occurred, the controller determines that the first-level emergency measures have failed and then activates the second-level emergency measures.

[0085] Alternatively, after activating the first-level emergency response, the controller sends its location information to the fire protection system it communicates with. The fire protection system determines whether a fire has occurred based on the location information sent by the controller and the fire information detected by the fire detectors. If a fire has occurred, the system determines that the first-level emergency response has failed and then activates the second-level emergency response.

[0086] This disclosure provides two levels of emergency response measures to handle two scenarios: the precursor to thermal runaway of lithium batteries and the occurrence of a fire. The intelligent isolation and extinguishing of fires greatly reduce the losses caused by thermal runaway of lithium batteries.

[0087] In one feasible implementation, the controller is used to send location information and fire information to the fire protection system, so that the fire protection system can activate the fire extinguishing equipment corresponding to the location information to fight the fire.

[0088] It is worth noting that fire extinguishing equipment includes, but is not limited to, automatic fire extinguishing equipment, gas fire extinguishing equipment, and dry powder fire extinguishing equipment. These equipment can reduce the spread of fire or eliminate the source of the fire in various ways, thereby protecting people, property, and the environment from the hazards of fire.

[0089] For example, as shown in Figure 4, when the first-level emergency measures fail and the thermal runaway of the lithium battery causes the fire to spread, the fire detectors in the area where the lithium battery is located will activate to obtain fire information. The fire protection system 7 will issue a fire alarm based on the location information and the fire information, and at the same time activate the fire extinguishing equipment 8 in the corresponding location to put out the fire.

[0090] In this embodiment of the invention, by linking with the fire protection system to activate the second-level emergency measures, the smoke from the fire can be reduced, the response speed to the fire can be improved, and the losses or hazards caused by the thermal failure of lithium batteries can be minimized.

[0091] As shown in Figure 5, the complete operation process of the lithium battery storage temperature monitoring system can include:

[0092] In step S101, the temperature information of lithium batteries in each compartment of each lithium battery shelf is acquired by multiple infrared thermal imaging devices.

[0093] In step S102, the temperature of each lithium battery on each lithium battery shelf is compared with the target temperature threshold to identify lithium batteries showing signs of thermal runaway.

[0094] In step S103, the current ambient temperature information is sampled by a temperature sensor, and the initial temperature threshold is adjusted by the temperature host according to the temperature sampling signal to obtain the target temperature threshold.

[0095] In step S104, the temperature of each lithium battery on each lithium battery shelf is compared with the target temperature threshold to identify lithium batteries showing signs of impending thermal runaway. If yes, proceed to step S105; otherwise, return to step S101.

[0096] In step S105, location information is generated and an alarm signal is output.

[0097] In step S106, the first-level emergency measures are activated.

[0098] In step S107, the fire information of each lithium battery shelf is detected by fire detection system.

[0099] In step S108, the fire protection system determines whether a fire has occurred based on the fire information and location information. If yes, proceed to step S109; otherwise, return to step S107.

[0100] In step S109, the second-quarter emergency measures are activated.

[0101] The lithium battery storage temperature monitoring system disclosed herein can monitor the temperature status of lithium batteries in lithium battery shelves using infrared thermal imaging equipment. It is adaptable to different types of shelves, especially in open shelf environments, and can quickly measure the heating temperature of small-sized lithium batteries. This effectively improves the early fire detection capability of lithium batteries in the storage process, allowing for greater fire advance warning and significantly reducing the possibility of property damage. Furthermore, it can display the surface temperature distribution of objects and provide temperature values, improving the speed and accuracy of temperature measurement and enabling the acquisition of large amounts of temperature data in a short time. This makes real-time fire monitoring more convenient and efficient. It is equipped with multiple alarm methods, such as audible alarms, flashing alarms, and information push notifications. Maintenance personnel can select the appropriate alarm method as needed to ensure that alarm information is promptly delivered to relevant personnel for timely fire response. Moreover, it can automatically adjust the target temperature threshold according to changes in ambient temperature, avoiding false alarms caused by seasonal or ambient temperature variations, thereby improving system stability and accuracy and ensuring alarm reliability.

[0102] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0103] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0104] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A lithium battery storage temperature monitoring system, characterized in that, include: A controller and an infrared thermal imaging device (2), wherein the controller is communicatively connected to the infrared thermal imaging device (2), and the detection area of ​​the infrared thermal imaging device (2) covers the lithium battery shelf (3); The infrared thermal imaging device (2) is used to acquire the temperature information of the lithium batteries in the lithium battery shelf (3) and send it to the controller; The controller is used to determine the lithium battery on the lithium battery shelf (3) that shows signs of thermal runaway based on the temperature information corresponding to the lithium battery shelf (3), and to perform emergency treatment.

2. The lithium battery storage temperature monitoring system according to claim 1, characterized in that, The temperature information includes the temperature of the lithium batteries in the lithium battery shelf (3); The controller is used to compare the temperature of each lithium battery on the lithium battery shelf (3) with a target temperature threshold, and when the temperature of the lithium battery is greater than the target temperature threshold, it determines that the lithium battery has a precursor to thermal runaway.

3. The lithium battery storage temperature monitoring system according to claim 2, characterized in that, It also includes an ambient temperature sampling device (6), which includes a temperature sensor and a temperature host, and the temperature host is communicatively connected to the temperature sensor and the controller respectively; The temperature sensor is used to sample the current ambient temperature, obtain a temperature sampling signal, and transmit the temperature sampling signal to the temperature host. The temperature host is used to obtain the target temperature threshold based on the temperature sampling signal and send the target temperature threshold to the controller.

4. The lithium battery storage temperature monitoring system according to claim 3, characterized in that, The temperature host is used to reduce the initial temperature threshold to obtain the target temperature threshold when the temperature sampling signal indicates that the ambient temperature has reached a preset first threshold. If the ambient temperature reaches a preset second threshold as indicated by the temperature sampling signal, the initial temperature threshold is increased to obtain the target temperature threshold.

5. The lithium battery storage temperature monitoring system according to any one of claims 1-4, characterized in that, It also includes a display device (5), which is communicatively connected to the controller; The controller is used to generate thermal image information of the lithium batteries in the lithium battery shelf (3) according to the temperature information of each lithium battery on the lithium battery shelf (3), and control the display device (5) to display the thermal image information.

6. The lithium battery storage temperature monitoring system according to any one of claims 1-5, characterized in that, The number of infrared thermal imaging devices (2) is multiple, and the controller is communicatively connected to each of the multiple infrared thermal imaging devices (2). The total detection area of ​​the multiple infrared thermal imaging devices (2) covers all lithium battery shelves (3).

7. The lithium battery storage temperature monitoring system according to claim 6, characterized in that, The first lithium battery shelf is provided with a first number of infrared thermal imaging devices (2) on the shelf beams (302) or shelf columns (301). The detection direction of the first number of infrared thermal imaging devices (2) is towards the second lithium battery shelf. The detection range of each infrared thermal imaging device (2) covers multiple compartments on the second lithium battery shelf. The detection range of the first number of infrared thermal imaging devices (2) covers the second lithium battery shelf. The second lithium battery shelf is provided with a second number of infrared thermal imaging devices (2) on the shelf beams (302) or shelf uprights (301). The detection direction of the second number of infrared thermal imaging devices (2) is towards the third lithium battery shelf. The detection range of each infrared thermal imaging device (2) covers multiple compartments on the third lithium battery shelf.

8. The lithium battery storage temperature monitoring system according to claim 7, characterized in that, The detection range of each of the infrared thermal imaging devices (2) is determined as follows: Determine the field of view of the infrared thermal imaging device (2) and the distance between the infrared thermal imaging device (2) and its detection object; The detection range of the infrared thermal imaging device (2) is determined based on the field of view and the distance.

9. The lithium battery storage temperature monitoring system according to any one of claims 1-8, characterized in that, The controller is used to activate the first-level emergency measures when a lithium battery with signs of impending thermal runaway appears on the lithium battery shelf (3), and to activate the second-level emergency measures if the first-level emergency measures fail.

10. The lithium battery storage temperature monitoring system according to claim 9, characterized in that, The controller is used to generate location information when a lithium battery showing signs of impending thermal runaway appears on the lithium battery shelf (3), send the location information to the maintenance personnel and issue an alarm, so that the maintenance personnel can handle the lithium battery showing signs of impending thermal runaway according to the location information.

11. The lithium battery storage temperature monitoring system according to claim 9, characterized in that, The controller is used to generate location information when a lithium battery showing signs of thermal runaway appears on the lithium battery shelf (3), and send the location information to the stacking robot so that the stacking robot can transfer the lithium battery showing signs of thermal runaway to a predetermined safe area according to the location information.

12. The lithium battery storage temperature monitoring system according to claim 11, characterized in that, It also includes a fire detector, which is communicatively connected to the controller; The fire detector is used to detect fire information of the lithium battery shelf (3); The controller is used to determine whether a fire has occurred based on the fire information of the lithium battery shelf (3) when the first-level emergency measures are activated, and to determine that the first-level emergency measures have failed if a fire has occurred based on the fire information.

13. The lithium battery storage temperature monitoring system according to claim 12, characterized in that, The controller is used to send the location information and the fire information to the fire protection system (7) so that the fire protection system (7) can activate the fire extinguishing equipment (8) corresponding to the location information to extinguish the fire.

14. The lithium battery storage temperature monitoring system according to claim 10, characterized in that, The controller generates an alarm through at least one of the following methods: It triggers the speaker to play alarm audio, controls the indicator lights to flash, and pushes alarm text to the maintenance personnel's terminal equipment.

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