Stackable immersion-cooled battery module

Abstract

The present invention provides a battery module that manages the emission of toxic gases, utilizes an exhaust structure and gas filtration device to discharge gases in the event of thermal runaway inside the battery module, avoids the risk of explosion due to abnormal pressure or temperature increases, and optimizes the coolant circulation path to reduce fluid resistance. [Solution] A single-layer immersion-cooled battery module comprises a tank, a top lid, and a gas filtration device. Battery cells and a battery management circuit board are housed within the tank, which is filled with insulating coolant to immerse the battery cells and circuit board. A gas discharge passage and a depressurized superheat release device are provided between the tank and the top lid to control the pressure or temperature within the sealed space. The depressurized superheat release device automatically opens the gas discharge passage based on the pressure or temperature within the sealed space to discharge the generated gas. The gas filtration device is located above the top lid, covers the depressurized superheat release device, has a gas discharge opening, and filters and adsorbs the generated gas before discharging it.

Description

Technical Field

[0001] The present invention relates to an immersion-cooled battery module, particularly a stacked immersion-cooled battery module capable of discharging gas. The product

Background Art

[0002] When a storage battery undergoes thermal runaway, a series of irreversible chemical reactions occur inside the battery, causing intense heat generation. As the reaction causes the temperature to rise, toxic gases, toxic substances, or corrosive substances are released. Therefore, the fire protection system used for the storage battery is designed to spray water for battery ignition or fire extinguishing agents, etc. to rapidly cool and extinguish the fire. However, simply spraying fire extinguishing water or fire extinguishing agents cannot suppress the release of toxic gases. Particularly in a confined space (e.g., a residential or indoor environment), the toxic gases are not only harmful to the human body and the environment but also promote the reaction due to the high temperature, generating more toxic gases, increasing the pressure, and ultimately having the potential to cause a fire and explosion.

[0003] To prevent thermal runaway of the storage battery, immersion cooling technology for the battery has been developed. The immersion cooling technology immerses the battery cells in an insulating coolant, indirectly exchanges heat with the battery through the coolant, takes away the heat of the battery to lower the temperature, and can prevent large-scale combustion of the battery cells. However, since the connectors of conventional immersion-cooled battery modules are immersed in the coolant for a long time, the sealing performance of the connectors may decrease, the materials may corrode, the fluid resistance may increase, and maintenance may become difficult. For example, when the sealing performance decreases, the coolant leaks, causing a short circuit of the battery or a decrease in cooling efficiency. Some coolants corrode metals or sealing materials, affecting the durability of the connectors. When using a conductive coolant, there is a possibility of causing local short circuits or a decrease in insulation performance of the connectors. Immersion-type electrical connectors may also be difficult to maintain and inspect.

[0004] To solve the problems of the above prior art, the present invention ,product ​We provide a stacked immersion-cooled battery module. [Overview of the project] [Problems that the invention aims to solve]

[0005] In view of the above problems, the object of the present invention is to enable control of exhaust gases. The product The present invention provides a stacked immersion-cooled battery module. According to the present invention, the discharge of toxic gases can be managed, and by utilizing an exhaust structure and gas filtration device, gases can be discharged in the event of thermal runaway inside the battery module, thereby avoiding the risk of explosion due to abnormal increases in pressure or temperature, and the coolant circulation path can be optimized to reduce fluid resistance. Another objective of the present invention is to improve the durability of electrical connectors and the stability of the system, to improve the deterioration of sealing performance due to prolonged immersion in coolant, to reduce maintenance costs and inspection difficulty, and to improve the convenience of system maintenance. [Means for solving the problem]

[0006] To achieve the above objective, the present invention Stackable We provide an immersion-cooled battery module. The stackable immersion-cooled battery module has multiple layers and a gas discharge pipe. Each layer in the multiple layers has a single-layer immersion-cooled battery module, and the multiple layers are formed by stacking the single-layer immersion-cooled battery modules of each layer vertically. A single-layer immersion-cooled battery module comprises a tank, a top cover, and a gas filtration device. The tank has a housing space. At least one battery cell and a battery management circuit board are provided in the housing space, and the battery cell and battery management circuit board are immersed in an insulating coolant. The top cover is fitted over the tank. A gas discharge passage is provided between the tank and the top cover, and a depressurized superheat release device is provided in the gas discharge passage, forming a sealed space between the tank and the top cover. The depressurized superheat release device opens the gas discharge passage based on the pressure or temperature of the sealed space, creating a communication between the tank and the top cover, and controls the pressure or temperature of the sealed space by discharging the generated gas in the sealed space through the gas discharge passage. The gas filtration device is provided above the top cover, covers the depressurized superheat release device, and has a gas discharge opening on one side, and the generated gas filtration Then, the filtered generated gas is discharged through the gas discharge opening. Gas discharge pipes are provided outside the tank body of each layer structure and are connected to the gas discharge opening of each layer structure to discharge the generated gas. An electrical connector is provided above the top lid of the single-layer immersion-cooled battery module of each layer structure. The electrical connector has multiple electrical connectors. The horizontal height of the multiple electrical connectors of each layer structure is higher than the liquid level of the insulating coolant of each layer structure. An alignment recess that is recessed toward the sealed space is provided at the bottom of the tank body of the single-layer immersion-cooled battery module of each layer structure, forming a relief space. Multiple layer structures are stacked tightly by stacking the alignment recess of the upper layer of each layer structure in alignment with the electrical connector of the lower layer.

[0007] In one embodiment of the present invention, the depressurized superheat release device is opened or ruptured when the pressure in the sealed space is above a pressure threshold or the temperature in the sealed space is above a temperature threshold, and the top lid and the tank body become connected.

[0008] In one embodiment of the present invention, the depressurized superheat release device is a sealing gasket or seal. When the pressure in the sealed space is above a pressure threshold or the temperature in the sealed space is above a temperature threshold, the gasket or seal automatically ruptures or deforms, and the top lid and the tank body become connected.

[0009] In one embodiment of the present invention, the gas filtration device has a case and an adsorption layer. The case covers the adsorption layer. The adsorption layer covers the reduced pressure superheat release device. 。

[0010] In one embodiment of the present invention, a plurality of holes are sequentially provided on the lower side of the gas discharge pipe. Each hole is connected to a gas discharge opening in each layer structure. The generated gas flows out from the upper side of the gas discharge pipe.

[0011] In one embodiment of the present invention, Each hole and the gas discharge opening in each layer structure are connected via connecting pipes.

[0012] Furthermore, the present invention provides another stackable immersion-cooled battery module. The stackable immersion-cooled battery module has a plurality of layer structures, a plurality of connecting pipes, and a plurality of gas discharge pipes. As described above, each layer structure of the plurality of layer structures is ,single It has a layered liquid immersion cooling battery module. The single-layer immersion-cooled battery module, each with its own layer structure, is stacked vertically to form a multi-layer structure. The single-layer immersion-cooled battery module comprises a tank, a top lid, and a gas filtration device. The tank has a housing space. At least one battery cell and a battery management circuit board are placed in the housing space, and the battery cell and battery management circuit board are immersed in insulating coolant. The top lid is placed over the tank. A gas discharge passage is provided between the tank and the top lid, and a depressurized superheat release device is provided in the gas discharge passage, forming a sealed space between the tank and the top lid. The depressurized superheat release device opens the gas discharge passage based on the pressure or temperature of the sealed space, creating communication between the tank and the top lid, and controls the pressure or temperature of the sealed space by discharging the generated gas in the sealed space through the gas discharge passage. The gas filtration device is installed above the top cover, covers the reduced pressure superheat release device, has a gas discharge opening on one side, filters the generated gas, and discharges the filtered generated gas through the gas discharge opening. Multiple connecting pipes are provided at the gas discharge openings of each layer structure. The multiple gas discharge pipes are located outside the tank body of each layer structure and are connected to the corresponding connecting pipes to form a sealed circulation path.

[0013] In one embodiment of the present invention, an electrical connector is provided above the top lid of each layered single-layer immersion-cooled battery module. The electrical connector has multiple electrical connectors. The horizontal height of the multiple electrical connectors in each layered structure is higher than the liquid level of the insulating coolant in each layered structure. An alignment recess that is recessed toward the sealed space is provided at the bottom of the tank body of each layered single-layer immersion-cooled battery module, forming a relief space. Multiple layered structures are stacked tightly by aligning the alignment recess of the upper layer of each layered structure with the electrical connector of the lower layer.

[0014] In one embodiment of the present invention, the stacked immersion-cooled battery module further comprises a fire extinguishing tank and an air circulation drive. The fire extinguishing tank stores a fire extinguishing liquid, is located above the multi-layer structure, and is connected to a gas discharge pipe. The air circulation drive is located on one side of the fire extinguishing tank, is connected to the gas discharge pipe, and circulates the generated gas between the single-layer immersion-cooled battery modules of each layer structure. The fire extinguishing tank has a thermal melting sprinkler head. The thermal melting sprinkler head contains a molten material or a low-melting-point material, senses the ambient temperature, and automatically melts or deforms when a certain temperature is exceeded, causing the fire extinguishing liquid to flow out. The fire extinguishing liquid is non-conductive deionized water, a fluorine compound liquid, silicone oil, or synthetic insulating oil. [Effects of the Invention]

[0015] This invention product The stacked immersion-cooled battery module, when combined with an exhaust structure and gas filtration device, effectively dissipates heat from the battery module during operation and can control internal pressure or temperature. Furthermore, it improves the safety and durability of the battery system, and in the event of thermal runaway of the battery, it releases toxic gases to reduce their concentration, thereby minimizing the impact on the environment and human health. ,product The overlapping immersion cooling structure ensures uniform distribution of the coolant, dissipating heat from the battery and reducing the risk of thermal runaway. Furthermore, it avoids prolonged immersion of the electrical connector in the coolant, improving connector durability, extending the lifespan of the battery module, and ensuring heat dissipation efficiency and durability. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic side view of an embodiment of the single-layer immersion-cooled battery module of the present invention. [Figure 2] This is a schematic three-dimensional diagram of an embodiment of the single-layer immersion-cooled battery module of the present invention. [Figure 3] Figure 2 is a schematic front view. The electrical connectors have been omitted. [Figure 4] Figure 1 is a schematic diagram showing what happens when the battery cell experiences thermal runaway. [Figure 5] This is a three-dimensional schematic diagram of the first embodiment of the stacked liquid immersion cooling battery module of the present invention. [Figure 6] This is a schematic diagram showing the stacked state of FIG. 5. [Figure 7] This is a three-dimensional schematic diagram of the second embodiment of the stacked liquid immersion cooling battery module of the present invention. [Figure 8] This is a three-dimensional schematic diagram of the third embodiment of the stacked liquid immersion cooling battery module of the present invention. [Figure 9] This is a schematic diagram of the fourth embodiment of the stacked liquid immersion cooling battery module of the present invention. [Figure 10] This is a schematic diagram of the fourth embodiment of the stacked liquid immersion cooling battery module of the present invention. [Figure 11] This is a schematic diagram of the fourth embodiment of the stacked liquid immersion cooling battery module of the present invention.

Embodiments for Carrying out the Invention

[0017] Embodiments of the present invention will be described while referring to the drawings. In the drawings and the specification, the same reference numerals indicate the same or similar members. In the drawings, for the sake of simplicity or convenience of display, the shape and thickness may be enlarged for display. It should be noted that parts not disclosed in the drawings or described in the specification are obvious to those skilled in the art. Those skilled in the art can make various changes and improvements based on the content of the present invention.

[0018] Hereinafter, an embodiment of the single-layer immersion-cooled battery module of the present invention will be described with reference to Figures 1 to 4. The single-layer immersion-cooled battery module A1 has a tank body 10, a top lid 20, and a gas filtration device 30. The tank body 10 has a housing space 100. At least one battery cell 12 and a battery management circuit board 13 are provided in the housing space 100, and the battery cell 12 and the battery management circuit board 13 are immersed in insulating coolant 11. The top lid 20 is placed over the tank body 10. A gas discharge passage 200 is provided between the tank body 10 and the top lid 20, and a depressurized superheat release device 22 is provided in the gas discharge passage 200, forming a sealed space between the tank body 10 and the top lid 20. The depressurized superheat release device 22 opens the gas discharge passage 200 based on the pressure or temperature of the sealed space, so that the tank body 10 and the top lid 20 are in communication. As a result, the generated gas 90 in the sealed space flows out through the gas discharge passage 200, thereby controlling the pressure or temperature within the sealed space. The gas filtration device 30 is located above the top cover 20, covers the depressurized superheat release device 22, and has a gas discharge opening 32 on one side, which adsorbs the generated gas 90 and discharges the filtered generated gas 90 through the gas discharge opening 32.

[0019] As shown in Figure 1, an electrical connector 24 is provided above the top lid 20. The electrical connector 24 has a plurality of electrical connectors 241. The horizontal height of the plurality of electrical connectors 241 is higher than the liquid level of the insulating coolant 11 inside the tank body 10. Since the external connection electrical connector 241 is provided at a position higher than the liquid level of the insulating coolant 11, it is possible to prevent the insulating coolant 11 from entering the external connection electrical connector 241. An alignment recess 14 that is recessed toward the sealed space is provided at the bottom of the tank body 10, forming a relief space (a so-called positional retraction space or space-saving section) outside the tank body 10.

[0020] As shown in Figure 2, the single-layer immersion-cooled battery module A1 further includes a gas discharge pipe 40. The gas discharge pipe 40 is located outside the tank body 10 and is connected to a gas discharge opening 32 to discharge the generated gas. The length and size of the gas discharge pipe 40 can be adjusted as required. In this embodiment, the gas discharge pipe 40 is directly connected to the connected gas discharge opening 32. In other embodiments, an extension pipe or connecting pipe is provided between the gas discharge pipe 40 and the gas discharge opening 32, and the gas discharge pipe 40 and the gas discharge opening 32 are tightly coupled to discharge the generated gas.

[0021] As shown in Figure 3, the gas filtration device 30 has a case 34 and an adsorption layer 36. The case 34 covers the adsorption layer 36. The adsorption layer 36 covers the reduced pressure superheat release device 22. The adsorption layer 36 is preferably activated carbon, zeolite, an acidic substance neutralizer, or a volatile substance catalyst. Examples of acidic substance neutralizers include calcium carbonate or calcium hydroxide. Examples of volatile substance catalysts include manganese dioxide. When the battery cell 12 experiences thermal runaway and generates a high-pressure generated gas, the adsorption layer 36 first performs a first-stage filtration and adsorption on the generated gas to adsorb toxic substances onto the adsorption layer 36. Then, the filtered generated gas is discharged from the gas discharge opening 32.

[0022] As shown in Figure 4, if one of the battery cells 12' experiences thermal runaway, it generates high-temperature, high-pressure gases 90, such as flammable gases (H2, CH4, C2H4), toxic gases (HF, phosphate compounds), and volatile organic compounds (VOCs). When the pressure in the sealed space exceeds the pressure threshold or the temperature in the sealed space exceeds the temperature threshold, the depressurized superheat release device 22 automatically opens or ruptures, and the top lid 20 and the tank body 10 become connected. The generated gases 90 then enter the adsorption layer 36 of the gas filtration device 30 from the gas discharge passage 200 and are filtered, and the filtered generated gases 90 are discharged from the gas discharge opening 32. The pressure threshold or temperature threshold can be adjusted according to the material or settings of the depressurized superheat release device. According to the present invention, the depressurized superheat release device 22 can be activated by sensing changes in pressure or temperature.

[0023] In other embodiments, the depressurized superheat release device 22 is a sealing gasket or seal. When the pressure in the sealed space is above a pressure threshold or the temperature in the sealed space is above a temperature threshold, the gasket or seal automatically ruptures or deforms, and the top lid 20 and the tank body 10 become connected. Therefore, if the temperature in the sealed space below the depressurized superheat release device 22 is high and the pressure is not high enough, the depressurized superheat release device 22 opens, and the top lid 20 and the tank body 10 become connected. Alternatively, if the pressure in the sealed space is high and the temperature is not high enough, the depressurized superheat release device 22 also opens, and the top lid 20 and the tank body 10 become connected. The present invention can be used in the two scenarios described above.

[0024] A first embodiment of a stackable immersion-cooled battery module will be described below with reference to Figures 5 and 6. The stackable immersion-cooled battery module B1 has a plurality of layer structures and a gas discharge pipe 40. Each layer structure A in the plurality of layer structures has the single-layer immersion-cooled battery module. The description of the same components will be omitted below. As shown in Figures 5 and 6, this embodiment has two layers of layer structure A, but is not limited to these. The stacked configuration is formed by vertically stacking the single-layer immersion-cooled battery modules of each layer structure A.

[0025] Each layer structure A of the single-layer immersion-cooled battery module has an electrical connector 24. The electrical connector 24 has a plurality of electrical connectors 241. The horizontal height of the plurality of electrical connectors 241 in each layer structure A is higher than the liquid level of the insulating coolant inside each layer structure A. As a result, the sealing rings of the electrical connectors 241 are not immersed in the insulating coolant, thus solving the problem of insulating coolant leakage due to deterioration or deformation of the sealing rings of conventional electrical connectors. According to the structure of the present invention, it is possible to prevent the insulating coolant from leaking from the sealed portion of the electrical connector 241.

[0026] Each layer structure A has a single-layer immersion-cooled battery module A1 with a tank body 10 that recesses into the sealed space at the bottom, forming a relief space. By stacking the upper layer's alignment recess 14 of each layer structure A in line with the lower layer's electrical connector 24, multiple layer structures are stacked tightly. This reduces the overall stacking height of the stacked immersion-cooled battery modules B1, allowing for efficient use of space according to the product equipment requirements, while simultaneously reducing heat buildup between each layer structure A and improving the overall cooling effect.

[0027] A second embodiment of the stackable immersion-cooled battery module B2 will be described below with reference to Figure 7. The difference between this embodiment and the first embodiment is the gas discharge pipe 40'. The gas discharge pipe 40' is provided outside the tank body 10 of each layer structure A and is connected to the gas discharge opening 32 of each layer structure A to discharge the generated gas 90. Multiple holes 400 are sequentially provided on the lower side of the gas discharge pipe 40'. Each hole 400 is connected to the gas discharge opening 32 of each layer structure A. The generated gas 90 flows to the outside from the upper side of the gas discharge pipe 40'. As a result, if thermal runaway occurs inside the tank body 10 of any of the layers in the multiple layer structures, the pressure or temperature inside the tank body 10 will become higher than the outside. In that case, the upper side of the gas discharge pipe 40' can be opened to allow the generated gas 90 to flow smoothly to the outside and prevent the generated gas 90 from accumulating in the tank body 10, the gas filtration device 30, or the gas discharge pipe 40'.

[0028] A third embodiment of the stackable immersion-cooled battery module will be described below with reference to Figure 8. The stackable immersion-cooled battery module B3 has multiple layer structures, multiple connecting pipes 50, and multiple gas discharge pipes 40''. As described above, each layer structure A of the multiple layer structures has the single-layer immersion-cooled battery module A1. Multiple connecting pipes 50 are provided at the gas discharge openings 32 of each layer structure A. Multiple gas discharge pipes 40'' are provided outside the tank body 10 of each layer structure A and are connected to the corresponding connecting pipes 50 to form a sealed circulation path.

[0029] The stacked immersion-cooled battery module B3 further comprises a fire extinguishing tank 60 and an air circulation drive device 70. The fire extinguishing tank 60 stores fire extinguishing liquid, is located above the uppermost layer structure A, and is connected to a gas discharge pipe 40''. The air circulation drive device 70 is located on one side of the fire extinguishing tank 60, is connected to the gas discharge pipe 40'', and circulates the generated gas between the single-layer immersion-cooled battery modules of each layer structure A. The air circulation drive device 70 may also be an exhaust fan.

[0030] According to this embodiment, the leakage of toxic gases to the outside is prevented, reducing harm to the environment and personnel and improving safety. By filtering or adsorbing the generated gases with the gas filtration device 30 in each layer structure A, toxic gases can be absorbed or neutralized, preventing their outflow. Furthermore, by providing an air circulation drive device 70 in the sealed circulation path, the flow of gas is controlled, the gas is treated to prevent contamination of the external environment, and the device operates stably.

[0031] The fourth embodiment of the stacked immersion-cooled battery module will be described below with reference to Figures 9 to 11. The stacked immersion-cooled battery module B4 has a three-layer structure A. Each layer structure A contains the single-layer immersion-cooled battery module, and its description will be omitted. The difference between this embodiment and the third embodiment is that the fire extinguishing tank 60 has a thermal melting sprinkler head 62. The thermal melting sprinkler head 62 contains a molten material or a low-melting-point material, senses the ambient temperature, and automatically melts or deforms when it exceeds a certain temperature, releasing the fire extinguishing liquid 600. The fire extinguishing liquid 600 may be non-conductive deionized water, a fluorine compound liquid (e.g., perfluorohexanone and its analogues), silicone oil, or synthetic insulating oil.

[0032] Each single-layer liquid-immersion cooled battery module of layer structure A is connected to the corresponding connecting pipe 50 via a gas discharge pipe 40'', and an air circulation drive device 70 circulates the internal gas between each module, maintaining a uniform temperature between each module.

[0033] For example, as shown in Figures 10 to 11, if one battery cell 12' in a single-layer liquid-immersion cooled battery module with a second layer structure A02 fails and thermal runaway occurs, the internal temperature rises rapidly, triggering a chain reaction. The battery cell 12' is unable to self-cool and generates a gas 90. In this case, the pressure in the sealed space increases, the depressurizing superheat release device 22 opens automatically, and the tank body 10 and the top lid 20 become connected. The gas 90 generated inside the tank body 10 flows to the gas filtration device 30 for the first stage of filtration. The filtered gas 90 is discharged from the gas discharge opening 32 to the connecting pipe 50, and then further discharged from the gas discharge pipe 40''.

[0034] As can be seen in Figure 10, the gas is circulated by the air circulation drive device 70. The two gas discharge pipes 40'' of the second layer structure A02 are connected to the connecting pipes 50 of the first layer structure A01 and the third layer structure A03, respectively. Therefore, the generated gas 90 that has undergone the first stage of filtration passes through the gas filtration devices 30 of the first layer structure A01 and the third layer structure A03 to undergo the second stage of filtration. As a result, the generated gas 90, which is a toxic gas, is absorbed into the adsorption layers 36 of each internal layer within the sealed circulation path, and the material of the adsorption layer 36 of each layer exerts its maximum adsorption effect, lowering the temperature of the gas.

[0035] As shown in Figure 11, if the internal pressure or temperature exceeds the safe temperature even after the second stage of filtration, the thermal melt sprinkler head 62 automatically opens, melts or deforms, and the fire extinguishing liquid 600 flows downward into each layer structure A. If there is a single-layer immersion cooling battery module that has experienced thermal runaway, the depressurized superheat release device 22 is open, allowing the fire extinguishing liquid 600 to enter the tank body 10 directly, extinguishing the fire, cooling down, and absorbing toxic substances or gases. In the other layer structures, if there is no single-layer immersion cooling battery module that has experienced thermal runaway, the depressurized superheat release device 22 is not open, allowing the fire extinguishing liquid 600 to remain in the gas filter 30, cooling down and insulating the gas filter 30.

[0036] To summarize the above, the present invention productThe stacked immersion-cooled battery module prevents leakage of toxic gases when battery cells experience thermal runaway, and leakage caused by the insulating coolant corroding electrical connectors, thereby improving equipment safety. It also prevents explosion or fire in abnormal battery module conditions, ensuring user and equipment safety, slowing battery degradation, and extending battery life. According to the present invention, the stacked immersion-cooled battery module allows for the placement of more batteries within the same volume, improving storage density and making it suitable for large-scale applications. Furthermore, the gas discharge structure in each layer allows for uniform management and protection of each layer battery module, reducing localized overheating or thermal runaway. In the event of thermal runaway, the stacked structure integrates exhaust paths and gas filtration devices to effectively treat toxic and flammable gases, improving safety.

[0037] The above is merely an example of the present invention. The present invention is not limited to these examples. Any modifications and improvements made based on the claims and specification of the present invention are included within the scope of the present invention. [Explanation of symbols]

[0038] A1 Single-layer immersion battery module A layer structure A01 Layer structure of the first layer A02 Layer structure of the second layer A03 Layer structure of the third layer B1, B2, B3, B4 Stackable Immersion Cooled Battery Modules 10 Tank body 100 Containment space 11. Insulating coolant 12, 12' battery cells 13 Battery management circuit board 14 Alignment recess 20 Top lid 200 Gas discharge passage 22. Reduced pressure superheat release device 24 Electrical connectors 241 Electrical connector 30 Gas filtration system 32 Gas discharge opening 34 cases 36 Adsorption layer 40, 40', 40'' gas exhaust pipe 400 holes 50 connecting pipes 60 Fire extinguishing tanks 600 Fire extinguishing liquid 62 Heat-melting sprinkler heads 70 Air circulation drive device 90 Gases produced

Claims

1. It has a multi-layer structure and a gas discharge pipe, Each of the aforementioned multiple layer structures has a single-layer liquid immersion cooling battery module, and the multiple layer structures are formed by vertically stacking the single-layer liquid immersion cooling battery modules of each layer structure. The aforementioned single-layer liquid immersion cooled battery module is It has a tank body, a top lid, and a gas filtration device, The tank has a storage space, At least one battery cell and a battery management circuit board are provided in the aforementioned containment space, and the at least one battery cell and the battery management circuit board are immersed in an insulating coolant. The aforementioned top cover is installed over the tank body, A gas discharge passage is provided between the tank body and the upper lid, a reduced pressure superheat release device is provided in the gas discharge passage, and a sealed space is formed between the tank body and the upper lid. The depressurized superheat release device controls the pressure or temperature within the sealed space by opening the gas discharge passage based on the pressure or temperature of the sealed space, thereby connecting the tank body and the upper lid, and discharging the generated gas in the sealed space through the gas discharge passage. The gas filtration device is provided above the upper lid, covers the reduced pressure superheat release device, has a gas discharge opening on one side, filters the generated gas, and discharges the filtered generated gas from the gas discharge opening. The gas discharge pipe is provided outside the tank body of each layer structure, connected to the gas discharge opening of each layer structure, and discharges the generated gas. An electrical connector is provided above the top cover of the single-layer liquid immersion cooled battery module of each of the aforementioned layer structures. The aforementioned electrical connector has a plurality of electrical connectors, The horizontal height of the plurality of electrical connectors in each of the aforementioned layer structures is higher than the liquid level of the insulating coolant in each of the aforementioned layer structures. In each of the layered single-layer liquid immersion cooled battery modules, a positioning recess is provided at the bottom of the tank body that is recessed toward the sealed space, forming a relief space. A stackable liquid immersion cooled battery module, wherein the multiple layer structures are tightly stacked by aligning the alignment recess of the upper layer of each layer structure with the electrical connector of the lower layer.

2. The depressurized superheat release device is opened or ruptured when the pressure in the sealed space is above a pressure threshold or the temperature in the sealed space is above a temperature threshold, and the top lid and the tank body are in the state of communication. The stackable immersion-cooled battery module according to claim 1.

3. The reduced pressure superheat release device is a sealing gasket or seal, When the pressure in the sealed space is above a pressure threshold or the temperature inside the sealed space is above a temperature threshold, the sealing gasket or the seal automatically ruptures or deforms, and the top lid and the tank body become connected. The stackable immersion-cooled battery module according to claim 1.

4. The gas filtration device comprises a case and an adsorption layer, The case covers the adsorption layer, The adsorption layer covers the vacuum superheat release device. The stackable immersion-cooled battery module according to claim 1.

5. Multiple holes are provided sequentially on the lower side of the gas discharge pipe. Each of the holes is connected to the gas discharge opening of each of the layer structures, The generated gas flows outwards from the upper side of the gas discharge pipe. The stackable immersion-cooled battery module according to claim 1.

6. Each of the aforementioned holes and the gas discharge openings of each of the aforementioned layer structures are connected via connecting pipes. The stackable immersion-cooled battery module according to claim 5.

7. It has multiple layer structures, multiple connecting pipes, and multiple gas discharge pipes, Each of the aforementioned multiple layer structures has a single-layer liquid immersion cooling battery module, and the multiple layer structures are formed by vertically stacking the single-layer liquid immersion cooling battery modules of each layer structure. The aforementioned single-layer liquid immersion cooled battery module is It has a tank body, a top lid, and a gas filtration device, The tank has a storage space, At least one battery cell and a battery management circuit board are provided in the aforementioned containment space, and the at least one battery cell and the battery management circuit board are immersed in an insulating coolant. The aforementioned top cover is installed over the tank body, A gas discharge passage is provided between the tank body and the upper lid, a reduced pressure superheat release device is provided in the gas discharge passage, and a sealed space is formed between the tank body and the upper lid. The depressurized superheat release device controls the pressure or temperature within the sealed space by opening the gas discharge passage based on the pressure or temperature of the sealed space, thereby connecting the tank body and the upper lid, and discharging the generated gas in the sealed space through the gas discharge passage. The gas filtration device is provided above the upper lid, covers the reduced pressure superheat release device, has a gas discharge opening on one side, filters the generated gas, and discharges the filtered generated gas from the gas discharge opening. The plurality of connecting pipes are provided at the gas discharge openings of each of the layered structures. The plurality of gas discharge pipes are provided outside the tank body of each layer structure and are connected to the corresponding connecting pipes to form a sealed circulation path. Stackable immersion-cooled battery module.

8. An electrical connector is provided above the top cover of the single-layer liquid immersion cooled battery module of each of the aforementioned layer structures. The aforementioned electrical connector has a plurality of electrical connectors, The horizontal height of the plurality of electrical connectors in each of the aforementioned layer structures is higher than the liquid level of the insulating coolant in each of the aforementioned layer structures. The stackable immersion-cooled battery module according to claim 7.

9. In each of the layered single-layer liquid immersion cooled battery modules, a positioning recess is provided at the bottom of the tank body that is recessed toward the sealed space, forming a relief space. By stacking the upper layer of each of the aforementioned layer structures in alignment with the lower layer's electrical connector, the multiple layer structures are tightly stacked. The stackable immersion-cooled battery module according to claim 8.

10. It further includes a fire extinguishing tank and an air circulation drive device, The fire extinguishing tank stores fire extinguishing liquid, is located above the multiple layered structure, and is connected to the gas discharge pipe. The air circulation drive device is located on one side of the fire extinguishing tank, is connected to the gas discharge pipe, and circulates the generated gas between the single-layer liquid immersion cooling battery modules of each layer structure. The stackable immersion-cooled battery module according to claim 7.

11. The aforementioned fire extinguishing tank has a heat-melting sprinkler head, The aforementioned heat-melting sprinkler head contains a molten material or a low-melting-point material, senses the ambient temperature, and automatically melts or deforms when it exceeds a certain temperature, thereby releasing the fire-extinguishing liquid. The stackable immersion-cooled battery module according to claim 10.

12. The fire extinguishing liquid is non-conductive deionized water, a fluorine compound solution, silicone oil, or synthetic insulating oil. The stackable immersion-cooled battery module according to claim 10.

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