An intrinsic safety type immersion battery module technology for airport field

Abstract

The application discloses an intrinsically safe immersion type battery module technology for the field of airports. The battery module comprises a delay module, a purification device, a control box, a liquid coolant and a battery module. The control box is used for containing the battery core group, the liquid coolant and the inert gas. The control box is fixed in the delay module, and the delay module is designed as a flue gas buffer area. The purification device is arranged in the delay module. The module is filled with non-combustible gas to reduce the oxygen concentration. The technical scheme of the application can significantly improve the safety and stability of the battery module through the immersion type liquid cooling and the improved flue gas management and inert filling, and is particularly suitable for the fields with extremely high safety requirements such as airports.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to an intrinsically safe submerged battery module technology for the airport sector. Background Technology

[0002] With the rapid development of new energy technologies, battery technology has been widely applied in the transportation sector. Especially in airports, battery modules have become a core component of ground equipment power systems, making their safety paramount. However, high-energy-density batteries pose a significant risk of thermal runaway. This not only releases large amounts of high-temperature toxic fumes but may also trigger further safety accidents such as fires and explosions.

[0003] Existing submersible battery modules have mainly improved heat dissipation performance, but still need to be optimized in terms of smoke management and open flame suppression to meet the high safety and high reliability requirements of airport environments. Summary of the Invention

[0004] Based on this, and to address the aforementioned technical problems, the present invention provides an intrinsically safe submerged battery module technology for the airport field. The submerged battery module includes: a hysteresis module, a purification device, a control housing, a coolant, and a battery module. The control housing is filled with the coolant, and a first channel and a second channel are provided on the outside of the control housing. The battery module is fixed within the control housing and completely submerged in the coolant. The control housing is fixed to the center of the hysteresis module, and a third channel and a fourth channel are provided on the outside of the hysteresis module. The purification device is disposed within the hysteresis module and can be disassembled and replaced.

[0005] In the intrinsically safe submerged battery module described above, the battery module is an 82.8V 90Ah titanium lithium-ion battery module with battery dimensions of (80cm×47cm×35cm) and no local protrusions.

[0006] In the intrinsically safe submersible battery module described above, optionally, the length of the control box should at least exceed the length of the battery module, and at most should not exceed twice the length of the battery module; the width of the control box should at least exceed the width of the battery module, and at most should not exceed twice the width of the battery module; and the height of the control box should at least exceed 1.5 times the height of the battery module.

[0007] In the intrinsically safe immersion battery module described above, the coolant is hexafluoropropylene trimer.

[0008] In the intrinsically safe immersion battery module described above, optionally, the immersion height of the liquid coolant should at least exceed the height of the battery module.

[0009] In the intrinsically safe immersion battery module described above, optionally, the immersion height of the liquid coolant should not exceed 2 / 3 of the height of the control box.

[0010] In the intrinsically safe submerged battery module described above, optionally, the control box and the delay module are filled with non-combustible gas, which includes one or more of inert gas and carbon dioxide.

[0011] In the intrinsically safe submerged battery module described above, optionally, the purification device includes a tank and a filler, the filler including one or more of activated carbon, oxidation catalyst, calcium hydroxide, and sodium carbonate.

[0012] In the intrinsically safe submerged battery module described above, the control box is fixed inside the hysteresis module by welding.

[0013] In the intrinsically safe submersible battery module described above, the purification device and the delay module are tightly connected by internal and external threads.

[0014] In the intrinsically safe submerged battery module described above, the control housing further includes a pressure relief device; the pressure relief device is used to open when the gas pressure inside the control housing exceeds a preset value to connect the control housing and the delay module.

[0015] In the intrinsically safe submerged battery module described above, the hysteresis module further includes a pressure relief device; the pressure relief device is used to open when the gas pressure inside the hysteresis module exceeds a preset value to connect the hysteresis module with the external environment.

[0016] In the intrinsically safe submerged battery module described above, optionally, the pressure relief device is located at the edge of the upper cover of the control box / delay module; and / or, the pressure relief device is located in the central area of ​​the upper cover of the housing / delay module.

[0017] In the intrinsically safe submerged battery module described above, the pressure relief device is characterized as a one-way pressure relief valve.

[0018] This application has at least the following beneficial effects:

[0019] Through fully immersed liquid cooling technology, the battery cells are completely submerged in the coolant, isolating them from the outside air and effectively preventing the generation of open flames during thermal runaway. Simultaneously, the excellent thermal conductivity of the coolant rapidly removes heat, lowering the battery temperature and further preventing the development of thermal runaway, significantly improving the safety of the battery module in airport operations. Furthermore, the module is filled with inert gas, thus eliminating the possibility of oxygen-assisted combustion. The combination of a delay module and adsorption purification materials effectively slows the spread of smoke and absorbs harmful substances and explosive gases to a certain extent, thereby reducing the internal pressure of the module and the risk of explosion. This technical solution, through the synergistic effect of fully immersed liquid cooling technology, non-combustible gas filling, and delay module design, achieves multiple safeguards for flame and smoke management during thermal runaway. Attached Figure Description

[0020] Figure 1 This is a top view schematic diagram of the intrinsically safe submersible battery module technology structure for the airport field according to this application;

[0021] Figure 2 This is a front view schematic diagram of an intrinsically safe submerged battery module technology structure for the airport field according to this application;

[0022] Figure 3 This is a schematic diagram of the battery module technology structure of this application.

[0023]

[0024] Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that all directional indications (such as up, down, left, right, forward, backward, etc.) in the embodiments of the present invention are based on the specific posture shown in the accompanying drawings, used to illustrate the relative positional relationship and motion state between the components. When the posture changes, the corresponding directional description should also be adjusted accordingly.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixing" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] To address the aforementioned technical problems, this invention provides an intrinsically safe submerged battery module technology for the airport sector. The intrinsically safe submerged battery module includes: a hysteresis module 100, a purification device 200, a control box 300, a liquid coolant 400, and a battery module 500.

[0029] In this embodiment, the battery module 500 consists of a cell assembly 520, which is composed of a housing 510 and battery cells 521. The battery module 500 is an 82.8V 90Ah titanium lithium-ion battery module, with module battery dimensions (80cm×47cm×35cm), excluding any protrusions, and a weight of 128kg.

[0030] In this embodiment, the liquid coolant 400 is hexafluoropropylene trimer. Hexafluoropropylene trimer has a low boiling point and possesses a high dielectric constant, good insulation properties, ideal chemical inertness, excellent thermal conductivity, and good system compatibility. After carrying away the heat from battery thermal runaway, hexafluoropropylene undergoes a phase change vaporization. Phase change cooling can significantly improve the heat transfer efficiency of the liquid, exhibiting an exponential effect, to achieve rapid and stable heat reduction.

[0031] Optionally, in one embodiment, the battery module 500 inside the control housing 300 is completely submerged in the liquid coolant 400; the immersion height of the liquid coolant 400 should be at least greater than the height of the battery module 500. In this way, the complete immersion of the battery module 500 by the liquid coolant 400 maximizes the contact area, achieving the best heat dissipation efficiency and preventing a drastic increase in temperature in the event of thermal runaway. On the other hand, the cell assembly 520 can be isolated from oxygen, making it less likely to generate an open flame.

[0032] In the submerged battery module described above, optionally, the immersion height of the liquid coolant 400 should not exceed 2 / 3 of the height of the control housing 300. This prevents the liquid coolant 400 from being damaged by excessive instantaneous pressure due to vapors generated during normal operation of the battery cell 521 and thermal runaway.

[0033] It should be noted that the non-combustible gases mentioned in this article refer to gases other than combustible gases and combustion-supporting gases.

[0034] Optionally, in one embodiment, the non-flammable gas includes one or more of inert gases and carbon dioxide. Thus, the non-flammable gas can further prevent the possibility of thermal runaway of the battery cell 521 resulting in an open flame, while also not reacting with oxygen.

[0035] Optionally, in one embodiment, the delay module 100 is provided with a third channel port 120 and a fourth channel port 130 communicating with the outside, and the control box 300 is provided with a first channel port 320 and a second channel port 330 communicating with the outside. The first channel port 320, the second channel port 330, the third channel port 120, and the fourth channel port 130 are used to allow liquid coolant and / or non-flammable gas to flow through. In this way, the non-flammable gas and / or liquid coolant in the delay module 100 and the control box 300 can be replaced in a timely manner.

[0036] Optionally, in one embodiment, after the intrinsically safe submerged battery module is packaged and its sealing is tested, gas can be filled into the delay module 100 through the third channel port 120 or the fourth channel port 130 according to the physical properties of the non-flammable gas, so as to further block the path of flammable gas coming into contact with oxygen to generate an open flame.

[0037] Optionally, in one embodiment, the second channel port 330 is higher than the first channel port 320. The battery module 500 has a first state and a second state. When the battery module 500 switches from the first state to the second state, the second channel port 330 is used to introduce non-flammable gas into the control housing 300, and the first channel port 320 is used to allow liquid coolant 400 to be discharged from the control housing 300. Thus, during this process, the non-flammable gas is squeezed downwards from the top of the housing to allow the liquid coolant 400 to be discharged from the first channel port 320. This facilitates the introduction of non-flammable gas into the control housing 300 and the discharge of liquid coolant 400 from the control housing 300, so that the amount of non-flammable gas gradually increases and the amount of liquid coolant 400 gradually decreases within the control housing 300. During the transition from the second state to the first state of the submerged battery module 400, the first channel port 320 is used to introduce liquid coolant 400 into the control housing 300, and the second channel port 330 is used to allow non-flammable gas to exit from the control housing 300. Thus, the liquid coolant 400 is compressed upwards from the bottom of the housing to allow the non-flammable gas to exit through the second channel port 330. This facilitates both the introduction of liquid coolant 400 into the control housing 300 and the exit of non-flammable gas from the control housing 300, resulting in a gradual decrease in non-flammable gas and a gradual increase in liquid coolant 400 within the control housing 300.

[0038] Optionally, in one embodiment, the control box 300 is fixed to the central position of the delay module 100 by welding.

[0039] Optionally, in one embodiment, the purification device 200 is connected to the delay module 100 by internal and external threads.

[0040] Optionally, in one embodiment, the purification device 200 includes a replaceable tank 210 containing a filler 220, the filler 220 including one or more of activated carbon, oxidation catalyst, calcium hydroxide, and sodium carbonate, for adsorbing toxic and harmful gases and some smoke and dust released during thermal runaway.

[0041] When cell 521 experiences thermal runaway, the hexafluoropropylene trimer absorbs heat and vaporizes. This vaporization leads to an increase in pressure within the control housing 300. For safety reasons, the delay module 100 and control housing 300 also include a pressure relief valve 110 and an explosion-proof pressure relief valve 310, located at the edge of the cover of the delay module 100 / control housing 300; and / or at the center of the cover. When the pressure in the delay module 100 / control housing 300 reaches a preset safety threshold, the pressure relief valve 110 / explosion-proof pressure relief valve 310 will open to release pressure, further preventing structural damage to the individual cells 521 in the cell assembly 520. The preset value may be, but is not limited to, the minimum pressure that the delay module 100 / control housing 300 can withstand.

[0042] This technical solution effectively prevents the occurrence and propagation of thermal runaway through a dual guarantee of fully immersed liquid cooling design and inert gas filling. In the early stages of thermal runaway in battery module 500, the liquid coolant 400 removes a large amount of heat through vaporization. As thermal runaway intensifies, the synergistic effect of the delay module 100 and the purification device 200 slows down the spread of flue gas and adsorbs and neutralizes harmful components in the flue gas. At the same time, the pressure relief device rapidly discharges excess gas, thereby reducing the internal pressure of the module and preventing the accumulation of explosive gas and subsequent explosion.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An intrinsically safe submerged battery module technology for the airport sector, characterized in that, The intrinsically safe immersion battery module includes: a hysteresis module, a purification device, a control box, a liquid coolant, and a battery module; The control box is filled with the liquid coolant, and the control box is provided with a first channel port and a second channel port on the outside; The battery module is fixed inside the control box and is completely immersed in the liquid coolant. The control box is fixed in the center of the delay module, and the delay module is provided with a third channel port and a fourth channel port on the outside; The purification device is installed in the delay module and can be disassembled and replaced.

2. The intrinsically safe immersion battery module according to claim 1, characterized in that, The battery module is an 82.8V 90Ah titanium lithium-ion battery module. The module battery dimensions are (80cm×47cm×35cm), excluding any protrusions, and the weight is 128kg.

3. The intrinsically safe immersion battery module according to claim 2, characterized in that, The length of the control box should be at least greater than the length of the battery module, and at most not more than twice the length of the battery module; the width of the control box should be at least greater than the width of the battery module, and at most not more than twice the width of the battery module; the height of the control box should be at least more than 1.5 times the height of the battery module.

4. The intrinsically safe immersion battery module according to claim 1, characterized in that, The liquid coolant is hexafluoropropylene trimer.

5. The intrinsically safe immersion battery module according to claim 1, characterized in that, The immersion height of the liquid coolant should be at least greater than the height of the battery module.

6. The intrinsically safe immersion battery module according to claim 1, characterized in that, The immersion height of the liquid coolant should not exceed 2 / 3 of the height of the control box.

7. The intrinsically safe immersion battery module according to claim 1, characterized in that, The control box and the delay module are filled with non-combustible gas, which includes one or more of inert gas and carbon dioxide.

8. The intrinsically safe immersion battery module according to claim 1, characterized in that, The purification device comprises a tank and a filling material, wherein the filling material includes one or more of activated carbon, an oxidation catalyst, calcium hydroxide, and sodium carbonate.

9. The intrinsically safe immersion battery module according to claim 1, characterized in that, The control box is fixed inside the delay module by welding.

10. The intrinsically safe immersion battery module according to claim 1, characterized in that, The purification device and the delay module are tightly connected by internal and external threads.

11. The intrinsically safe immersion battery module as described in claim 1, characterized in that, The control box further includes a pressure relief device; the pressure relief device is used to open when the gas pressure inside the control box exceeds a preset value to connect the control box and the delay module.

12. The intrinsically safe immersion battery module as described in claim 1, characterized in that, The delay module further includes a pressure relief device; the pressure relief device is used to open when the gas pressure in the delay module is greater than a preset value to connect the delay module with the external environment.

13. The intrinsically safe immersion battery module as described in claim 11 or 12, wherein the pressure relief device is disposed at the edge of the upper cover of the control housing / delay module; and / or, the pressure relief device is disposed in the central area of ​​the upper cover of the housing / delay module.

14. The intrinsically safe immersion battery module as described in claim 11 or 12, characterized in that, The pressure relief device is configured as a one-way pressure relief valve.

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