Lithium-ion battery safe storage device

Abstract

The application discloses a lithium ion battery safe storage device and belongs to the technical field of lithium ion battery safe energy storage. The lithium ion battery safe storage device further comprises a liquid cooling plate, the liquid cooling plate covers each battery module, and the sidewall of the bottom plate groove is connected; the upper surface of the liquid cooling plate is provided with a gas storage bag, the gas storage bag stores fire-retardant gas, the gas storage bag is communicated with a plurality of gas pipelines, each gas pipeline is communicated with the inside of the shell through the liquid cooling plate, and the fire-retardant gas is conveyed to the inside of the shell; meanwhile, the shell is provided with an exhaust hole, the exhaust hole discharges the fire-retardant gas and carries away heat, and cooling is realized. The lithium ion battery safe storage device can monitor the temperature in the shell in real time, intelligently cools when the temperature in the shell exceeds a threshold value, avoids the temperature from being unable to be lowered in time and thus causes thermal runaway to occur, inhibits the spread of thermal runaway among the modules, protects the battery modules, and reduces losses.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery safe energy storage technology, and specifically to a lithium-ion battery safe storage device. Background Technology

[0002] As a stable and efficient energy storage medium in electrochemical energy storage, lithium-ion batteries have been widely used in emerging industries such as new energy power generation and new energy electric vehicles. With the popularization of the new energy industry in modern society, the demand for electrochemical energy storage is gradually increasing, and the usage rate of lithium-ion batteries in production and daily life is also gradually increasing, becoming one of the mainstream energy storage methods. However, lithium-ion batteries have the problem of heat release during charging and discharging; therefore, lithium-ion modules—specifically the battery pack layer—need to prevent heat concentration during application.

[0003] In traditional battery packs, the modules of battery cells are densely arranged. When heat is concentrated, it can easily cause a single module cell to rupture or even explode. This can lead to rapid heat dissipation, and high-temperature gas and jet fire can damage adjacent module cells and components above the battery pack, further increasing the danger and causing greater losses. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a lithium-ion battery safe storage device that can monitor the temperature inside the casing in real time and intelligently cool down when the internal temperature of the casing exceeds a threshold, thereby avoiding the occurrence of thermal runaway due to the inability to reduce the temperature in time, suppressing the spread of thermal runaway between modules, protecting the battery modules, and reducing losses.

[0005] This invention provides a lithium-ion battery safety storage device, including a base plate groove for uniformly storing multiple battery modules. Each battery module includes battery cells housed within a casing. The device also includes a liquid cooling plate covering each battery module and connected to the sidewall of the base plate groove. A gas storage bag is disposed on the upper surface of the liquid cooling plate, containing flame-retardant gas. The gas storage bag is connected to multiple gas pipes, each passing through the liquid cooling plate and communicating with the interior of one of the casings to deliver the flame-retardant gas into the casing. Simultaneously, the casing has exhaust holes that discharge the flame-retardant gas and carry away heat, achieving cooling. Each gas pipe inside the casing is equipped with a solenoid valve. Each battery module's casing has an internal temperature sensor. When the temperature sensor detects that the internal temperature of the corresponding battery module's casing reaches a threshold temperature, the battery pack master controller controls the corresponding solenoid valve to open. The solenoid valve closes when the temperature sensor detects that the internal temperature of the battery module's casing has dropped below the threshold temperature.

[0006] Preferably, each of the housings is provided with an air extraction hole, which is close to the exhaust hole. Each air extraction hole is connected to one end of a branch exhaust pipe. The other end of each branch exhaust pipe is provided with a check valve to prevent the flame-retardant gas from flowing back into the housing. The check valve is connected to the main exhaust pipe. The end of the main exhaust pipe is provided with an air extraction pump. The main exhaust pipe is fixedly mounted on the liquid cooling plate. When the solenoid valve is opened, the battery pack main controller controls the air extraction pump to start synchronously, so as to guide the flame-retardant gas in the housing of each battery module to the atmosphere through the branch exhaust pipe and the main exhaust pipe. When the solenoid valve is closed, the battery pack main controller controls the air extraction pump to stop synchronously.

[0007] Preferably, a gas sensor is provided inside the housing, and the multiple battery modules are arranged in a matrix in the bottom plate groove. Each row of battery modules has heat insulation plates on both sides of the row direction, and each column of multiple battery modules has a groove on both sides of the bottom plate groove. A spring is provided in the groove, one end of the spring abuts against the bottom surface of the groove, and the other end is connected to a heat insulation movable plate. The heat insulation movable plate slides vertically in a sliding groove, which is fixedly set on the groove. An iron core is provided on the heat insulation movable plate, and the iron core is attracted and cooperates with an electromagnet. The electromagnet is set at the edge of the groove opening. At the same time, a folded heat insulation layer is provided in the groove, and the heat insulation layer is connected to the spring.

[0008] Preferably, the battery pack master controller is electrically connected to a buzzer, which is used to emit an alert sound. When the temperature sensor detects that the internal temperature of the battery module's casing is less than or equal to a first threshold, the battery pack master controller controls the temperature sensor to continue monitoring. When the temperature sensor detects that the internal temperature of the battery module's casing is greater than the first threshold, the corresponding solenoid valve opens, the gas pipeline releases gas, and the vacuum pump starts to remove heat from the casing. This continues until the temperature sensor detects that the internal temperature of the battery module's casing is less than the first threshold. At this point, the battery pack master controller controls the solenoid valve to close, the vacuum pump to shut down, and the buzzer releases a monitoring signal to alert management personnel to pay attention to the battery status, thus forming a first-level early warning.

[0009] Preferably, when the vacuum pump is turned on, if the temperature sensor detects that the internal temperature of the battery module casing is continuously greater than or equal to a first threshold, or if the gas sensor detects that the battery cell is releasing a specific gas, the battery pack master controller controls the corresponding solenoid valve and vacuum pump to remain open, and simultaneously controls the corresponding electromagnet to be de-energized, causing the iron core to release from the electromagnet. At this time, the spring pushes the movable plate, causing the movable plate to press tightly against the liquid cooling plate. At the same time, the spring pulls the heat insulation layer to unfold, thereby shielding the battery module and sealing the exhaust vent, preventing heat transfer to adjacent battery modules. When the temperature sensor detects that the internal temperature of the battery module casing is continuously less than the first threshold, or if the gas sensor does not detect the battery cell releasing a specific gas, the battery pack master controller controls the solenoid valve to close and the vacuum pump to shut down. At the same time, the buzzer releases a monitoring signal to alert management personnel to pay attention to the battery status, forming a secondary early warning.

[0010] Preferably, when the electromagnet is de-energized, the spring pulls the heat insulation layer to unfold, thus shielding the battery module and sealing the vent. When the temperature sensor detects that the internal temperature of the battery module's casing is greater than or equal to a second threshold and continues to rise, the battery pack main controller controls the buzzer to sound an alarm and prompts personnel to evacuate. When the temperature sensor detects that the internal temperature of the battery module's casing is less than the second threshold, and the gas sensor detects that the concentration of a specific gas is continuously rising, indicating that the release rate of the specific gas is continuously increasing, the battery pack main controller controls the buzzer to sound an alarm and prompts personnel to evacuate. When the gas sensor detects that the release rate of the specific gas is decreasing or remaining unchanged, the battery pack main controller controls the buzzer to release a signal to prompt maintenance, forming a three-level early warning system.

[0011] Preferably, the battery module contains multiple battery cells, and the safety valves on the multiple battery cells all face the vent holes and are parallel to the surface of the liquid cooling plate.

[0012] Preferably, the gas sensor is located above the exhaust port.

[0013] Preferably, the temperature sensor is fixedly mounted on the battery cell.

[0014] Preferably, the heat insulation layer corresponds to two springs, which are located on both sides of the heat insulation layer, and each spring is connected to the heat insulation layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this lithium-ion battery safety storage device, a liquid cooling plate is used to absorb heat from the battery module and simultaneously cool the flame-retardant gas. The cooled flame-retardant gas carries away the heat inside the casing. A temperature sensor is used to monitor the temperature inside the casing in real time. When the temperature sensor detects that the internal temperature of the corresponding battery module casing reaches the threshold temperature, the battery pack master controller controls the corresponding solenoid valve to open, allowing the flame-retardant gas in the gas storage pack to enter the casing, carry away the heat inside the casing, and then be discharged from the exhaust port. This ensures that the internal temperature of the battery module casing detected by the temperature sensor drops below the threshold temperature, at which point the battery pack master controller controls the solenoid valve to close.

[0017] This lithium-ion battery safety storage device solves the problem that when the modules of a traditional battery pack are densely arranged, heat concentration can easily lead to the rupture or even explosion of a single module cell. It avoids the problem of rapid heat and high-temperature gas diffusion, can monitor the temperature inside the casing in real time, and can intelligently cool down when the internal temperature of the casing exceeds the threshold. This prevents the temperature from failing to drop in time and thus prevents thermal runaway from occurring. It also inhibits the spread of thermal runaway between modules, protects the battery modules, and reduces losses. Attached Figure Description

[0018] Figure 1 This is a flowchart of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the battery module of the present invention;

[0020] Figure 3 This diagram shows the positional relationship between multiple battery modules and the heat insulation plate.

[0021] Figure 4 This is an assembly drawing of the base plate groove;

[0022] Figure 5 This is a schematic diagram showing the folded state of the insulation layer;

[0023] Figure 6 This is a schematic diagram showing the unfolded state of the insulation layer;

[0024] Figure 7 This is a schematic diagram showing the connection between the insulation layer and the spring.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Battery module, 2. Heat insulation plate, 3. Gas storage pack, 4. Battery cell, 5. Liquid cooling plate, 6. Gas sensor, 7. Exhaust port, 8. Suction port, 9. Branch exhaust pipe, 10. Main exhaust pipe, 11. Temperature sensor, 12. Solenoid valve, 13. Heat insulation layer, 14. Slide, 15. Heat insulation movable plate, 16. Spring, 17. Iron core. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. Words such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “inner,” “outer,” “upper,” “lower,” “far,” “near,” “front,” and “back” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0029] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0030] The lithium-ion battery safety storage device provided by this invention includes a base plate slot for uniformly storing multiple battery modules 1. Each battery module 1 includes battery cells 4 disposed within a housing, such as... Figures 2-6 It also includes: a liquid cooling plate 5, which covers each battery module 1 and is connected to the side wall of the bottom plate groove. A gas storage bag 3 is provided on the upper surface of the liquid cooling plate 5. The gas storage bag 3 stores flame-retardant gas and is connected to multiple gas pipes. Each gas pipe passes through the liquid cooling plate 5 and is connected to the interior of one of the housings for supplying flame-retardant gas into the housing. At the same time, the housing is provided with an exhaust hole 7 to discharge the flame-retardant gas and remove heat, thereby achieving cooling. Each gas pipe inside the housing is provided with a solenoid valve 12. Each battery module 1 is provided with a temperature sensor 11 inside its housing. When the temperature sensor 11 detects that the internal temperature of the corresponding battery module 1 reaches the threshold temperature, the battery pack master controller controls the corresponding solenoid valve 12 to open until the temperature sensor 11 detects that the internal temperature of the battery module 1 drops below the threshold temperature, at which point the battery pack master controller controls the solenoid valve 12 to close.

[0031] In this lithium-ion battery safety storage device, the liquid cooling plate 5 is used to absorb the heat of the battery module 1. At the same time, the liquid cooling plate 5 is used to cool the flame-retardant gas. The cooled flame-retardant gas carries away the heat inside the casing. The temperature sensor 11 is used to detect the temperature inside the casing in real time. When the temperature sensor 11 detects that the internal temperature of the corresponding battery module 1 casing reaches the threshold temperature, the battery pack master controller controls the corresponding solenoid valve 12 to open, so that the flame-retardant gas in the gas storage pack 3 enters the casing, carries away the heat inside the casing, and is discharged from the exhaust port 7, so that the internal temperature of the battery module 1 casing detected by the temperature sensor 11 drops below the threshold temperature, and the battery pack master controller controls the solenoid valve 12 to close.

[0032] This lithium-ion battery safety storage device can monitor the temperature inside the casing in real time and intelligently cool it down when the internal temperature exceeds a threshold. This prevents thermal runaway caused by the inability to reduce the temperature in time, inhibits the spread of thermal runaway between modules, protects the battery modules, and reduces losses.

[0033] In this embodiment, as Figures 2-6 Each of the aforementioned housings is provided with an air extraction hole 8, which is close to the exhaust hole 7. Each air extraction hole 8 is connected to one end of a branch exhaust pipe 9. The other end of each branch exhaust pipe 9 is provided with a check valve to prevent the flame-retardant gas from flowing back into the housing. The check valve is connected to the main exhaust pipe 10. The end of the main exhaust pipe 10 is provided with an air extraction pump. The main exhaust pipe 10 is fixedly mounted on the liquid cooling plate 5. When the solenoid valve 12 is opened, the battery pack main controller controls the air extraction pump to start synchronously, so as to guide the flame-retardant gas in the housing of each battery module 1 to the atmosphere through the branch exhaust pipe 9 and the main exhaust pipe 10. When the solenoid valve 12 is closed, the battery pack main controller controls the air extraction pump to stop synchronously.

[0034] By turning on the air pump, the gas inside the casing is quickly discharged into the atmosphere, avoiding the problem of untimely gas discharge and speeding up the gas discharge speed. At the same time, the cooling speed of battery cell 4 is faster. The check valve is used to prevent gas from flowing between multiple casings.

[0035] In this embodiment, as Figures 2-7A gas sensor 6 is installed inside the housing. The multiple battery modules 1 are arranged in a matrix in the bottom plate groove. Each row of battery modules 1 has heat insulation plates 2 on both sides of the row direction. Each column of multiple battery modules 1 has a groove on both sides of the bottom plate groove. A spring 16 is installed in the groove. One end of the spring 16 abuts against the bottom surface of the groove, and the other end is connected to a heat insulation movable plate 15. The heat insulation movable plate 15 slides vertically in a sliding groove 14. The sliding groove 14 is fixedly installed on the groove. An iron core 17 is installed on the heat insulation movable plate 15. The iron core 17 is attracted and cooperates with an electromagnet. The electromagnet is located at the edge of the groove opening. At the same time, a folded heat insulation layer 13 is installed in the groove. The heat insulation layer 13 is connected to the spring 16.

[0036] When the internal temperature of the casing exceeds a threshold, the battery pack master controller de-energizes the electromagnet, and the spring 16 releases to unfold the folded heat insulation layer 13, sealing the heated battery module 1 and preventing heat transfer to adjacent battery modules. By utilizing the diffusion and dilution of the cooled flame-retardant gas, and with the spring 16 driving the heat insulation layer 13 to unfold, the internal temperature of the battery module 1 can be effectively cooled, delaying the thermal runaway process and suppressing the spread of thermal runaway between modules.

[0037] In this embodiment, as Figures 1 to 7 The battery pack main controller is electrically connected to a buzzer, which is used to emit an alert sound to the outside world. The first threshold temperature is set to 60°C. When the temperature sensor 11 detects that the internal temperature of the battery module 1 is less than or equal to 60°C, the battery pack main controller controls the temperature sensor 11 to continue monitoring. When the temperature sensor 11 detects that the internal temperature of the battery module 1 is greater than 60°C, the corresponding solenoid valve 12 opens, the gas pipeline releases gas, and the air pump starts to remove the heat inside the casing. This continues until the temperature sensor 11 detects that the internal temperature of the battery module 1 is less than 60°C. At this point, the battery pack main controller controls the solenoid valve 12 to close, the air pump to shut down, and the buzzer releases a monitoring signal to alert management personnel to pay attention to the battery status, thus forming a first-level early warning.

[0038] In this embodiment, as Figure 1When the vacuum pump is turned on, if the temperature sensor 11 detects that the internal temperature of the battery module 1 is continuously greater than or equal to 60°C, or the gas sensor 6 detects that the battery cell 4 releases a specific gas, the battery pack main controller controls the corresponding solenoid valve 12 and vacuum pump to remain open, and simultaneously controls the corresponding electromagnet to be de-energized. The iron core 17 is released from the electromagnet, and at this time, the spring 16 pushes the movable plate 15 so that the movable plate 15 is in close contact with the liquid cooling plate 5. At the same time, the spring 16 pulls the heat insulation layer 13 to unfold, thereby shielding the battery module 1 and sealing the exhaust port 7 to prevent heat from being transferred to the adjacent battery module 1. When the temperature sensor 11 detects that the internal temperature of the battery module 1 is continuously less than 60°C, or the gas sensor 6 does not detect that the battery cell 4 releases a specific gas, the battery pack main controller controls the solenoid valve 12 to close and the vacuum pump to shut down. At the same time, the buzzer releases a monitoring signal to prompt the management personnel to pay attention to the battery status, forming a secondary warning.

[0039] In this embodiment, as Figure 1 When the electromagnet is de-energized, the spring 16 pulls the heat insulation layer 13 to unfold, thus shielding the battery module 1 and sealing the exhaust port 7. When the temperature sensor 11 detects that the internal temperature of the battery module 1 is greater than or equal to a second threshold and continues to rise (the second threshold is set to 100°C), the battery pack main controller controls the buzzer to sound an alarm and prompts personnel to evacuate. When the temperature sensor 11 detects that the internal temperature of the battery module 1 is less than 100°C, and the gas sensor 6 detects that the concentration of a specific gas is continuously rising, indicating that the release rate of the specific gas is continuously increasing, the battery pack main controller controls the buzzer to sound an alarm and prompts personnel to evacuate. When the gas sensor 6 detects that the release rate of the specific gas is decreasing or unchanged, the battery pack main controller controls the buzzer to release a signal to prompt maintenance, forming a three-level early warning system.

[0040] This lithium-ion battery safety storage device has a three-level early warning function, which takes corresponding early warning and control measures for battery module 1 under different conditions, and responds promptly to thermal runaway hazards, ensuring high safety. The lithium-ion battery safety storage device is simple and practical, with a clear path, low material cost, and easy-to-implement functions. Overall, it ensures the stability and safety of the battery module and battery pack during operation, reducing the losses caused by thermal runaway disasters.

[0041] In this embodiment, as Figure 2 and Figure 5 The battery module 1 contains multiple battery cells 4, and the safety valves on the multiple battery cells 4 all face the exhaust port 7 and are parallel to the surface of the liquid cooling plate 5.

[0042] This lithium-ion battery safety storage device changes the traditional cell placement method, avoiding direct damage to objects or people above the battery pack caused by thermal runaway high-temperature gas generation and jet flames. It facilitates the rapid discharge of high-temperature gas from the exhaust port 7 and the extraction port 8, which can better protect the safety of battery pack components and users.

[0043] In this embodiment, as Figure 5 The gas sensor 6 is located above the exhaust port 7.

[0044] In this embodiment, as Figure 2 The temperature sensor 11 is fixedly mounted on the battery cell 4.

[0045] In this embodiment, as Figure 7 The heat insulation layer 13 corresponds to two springs 16, which are located on both sides of the heat insulation layer 13, and each spring 16 is connected to the heat insulation layer 13.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery safety storage device, comprising a base plate groove for uniformly storing multiple battery modules (1), wherein the battery module (1) includes battery cells (4) disposed within a housing, characterized in that, It also includes a liquid cooling plate (5); The liquid cooling plate (5) covers the top of each battery module (1) and is connected to the side wall of the bottom plate groove. A gas storage bag (3) is provided on the upper surface of the liquid cooling plate (5). The gas storage bag (3) stores flame-retardant gas. The gas storage bag (3) is connected to multiple gas pipes. Each gas pipe passes through the liquid cooling plate (5) and is connected to the inside of one of the housings for conveying flame-retardant gas into the housing. At the same time, the housing is provided with an exhaust hole (7). The exhaust hole (7) discharges the flame-retardant gas and carries away heat to achieve cooling. Each housing is equipped with a solenoid valve (12) on the gas pipe inside the housing, and each battery module (1) is equipped with a temperature sensor (11) inside the housing. When the temperature sensor (11) detects that the internal temperature of the corresponding battery module (1) reaches the threshold temperature, the battery pack controller controls the corresponding solenoid valve (12) to open until the temperature sensor (11) detects that the internal temperature of the battery module (1) drops below the threshold temperature, the battery pack controller controls the solenoid valve (12) to close. Each of the aforementioned housings is provided with an air extraction hole (8), which is close to the exhaust hole (7). Each air extraction hole (8) is connected to one end of a branch exhaust pipe (9). The other end of each branch exhaust pipe (9) is provided with a check valve to prevent the flame-retardant gas from flowing back into the housing. The check valve is connected to the main exhaust pipe (10). The end of the main exhaust pipe (10) is provided with an air extraction pump. The main exhaust pipe (10) is fixedly installed on the liquid cooling plate (5). When the solenoid valve (12) is opened, the battery pack main controller controls the air extraction pump to open synchronously, so as to guide the flame-retardant gas in the housing of each battery module (1) to the atmosphere through the branch exhaust pipe (9) and the main exhaust pipe (10). When the solenoid valve (12) is closed, the battery pack main controller controls the air extraction pump to close synchronously. A gas sensor (6) is provided inside the housing. The multiple battery modules (1) are arranged in a matrix in the bottom plate groove. Each row of battery modules (1) is provided with heat insulation plates (2) on both sides of the row direction. Each column of multiple battery modules (1) is provided with a groove on both sides of the bottom plate groove. A spring (16) is provided in the groove. One end of the spring (16) abuts against the bottom surface of the groove, and the other end is connected to a heat insulation movable plate (15). The heat insulation movable plate (15) slides vertically in the sliding groove (14). The sliding groove (14) is fixedly set on the groove. An iron core (17) is provided on the heat insulation movable plate (15). The iron core (17) is attracted and cooperates with an electromagnet. The electromagnet is set at the edge of the groove opening. At the same time, a folded heat insulation layer (13) is provided in the groove. The heat insulation layer (13) is connected to the spring (16). The battery module (1) contains multiple battery cells (4), and the safety valves on the multiple battery cells (4) are all facing the exhaust port (7) and are all parallel to the surface of the liquid cooling plate (5).

2. The lithium-ion battery safe storage device as described in claim 1, characterized in that, The battery pack controller is electrically connected to a buzzer, which is used to emit a warning sound to the outside world. When the temperature sensor (11) detects that the internal temperature of the battery module (1) is less than or equal to the first threshold, the battery pack controller controls the temperature sensor (11) to continue to detect. When the temperature sensor (11) detects that the internal temperature of the battery module (1) is greater than the first threshold, the corresponding solenoid valve (12) opens, the gas pipeline releases gas, and the air pump starts to remove the heat inside the casing. Until the temperature sensor (11) detects that the internal temperature of the battery module (1) is less than the first threshold, the battery pack controller controls the solenoid valve (12) to close, the air pump to close, and the buzzer releases a monitoring signal to remind the management personnel to pay attention to the battery status, forming a first-level warning.

3. The lithium-ion battery safe storage device as described in claim 2, characterized in that, When the vacuum pump is turned on, if the temperature sensor (11) detects that the internal temperature of the battery module (1) is continuously greater than or equal to the first threshold, or if the gas sensor (6) detects that the battery cell (4) releases a specific gas, the battery pack controller will control the corresponding solenoid valve (12) and vacuum pump to continue to open, and at the same time control the corresponding electromagnet to de-energize, and the iron core (17) will release the adsorption state from the electromagnet. At this time, the spring (16) will push the movable plate (15) so that the movable plate (15) is in close contact with the liquid cooling plate (5). At the same time, the spring (16) will pull the heat insulation layer (13) to unfold, thereby shielding the battery module (1) and sealing the exhaust hole (7) to prevent heat from being transferred to the adjacent battery module (1). When the temperature sensor (11) detects that the internal temperature of the battery module (1) is continuously less than the first threshold, or if the gas sensor (6) does not detect that the battery cell (4) releases a specific gas, the battery pack controller will control the solenoid valve (12) to close, the vacuum pump to close, and at the same time the buzzer will release a monitoring signal to remind the management personnel to pay attention to the battery status, forming a secondary warning.

4. The lithium-ion battery safe storage device as described in claim 3, characterized in that, When the electromagnet is de-energized, the spring (16) pulls the heat insulation layer (13) to unfold, thereby shielding the battery module (1) and sealing the exhaust port (7). When the temperature sensor (11) detects that the internal temperature of the battery module (1) is greater than or equal to the second threshold and continues to rise, the battery pack controller controls the buzzer to issue a warning and prompts personnel to evacuate. When the temperature sensor (11) detects that the internal temperature of the battery module (1) is less than the second threshold, and the gas sensor (6) detects that the concentration of a specific gas is constantly rising, indicating that the release rate of the specific gas is constantly rising, the battery pack controller controls the buzzer to issue a warning and prompts personnel to evacuate. When the gas sensor (6) detects that the release rate of the specific gas is decreasing or unchanged, the battery pack controller controls the buzzer to release a signal to prompt maintenance, forming a three-level warning.

5. The lithium-ion battery safe storage device as described in claim 2, characterized in that, The gas sensor (6) is located above the exhaust port (7).

6. The lithium-ion battery safe storage device as described in claim 1, characterized in that, The temperature sensor (11) is fixedly mounted on the battery cell (4).

7. The lithium-ion battery safe storage device as described in claim 2, characterized in that, The heat insulation layer (13) corresponds to two springs (16), which are located on both sides of the heat insulation layer (13) and each spring (16) is connected to the heat insulation layer (13).

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