Immersion liquid cooling lithium battery array facing honeycomb support and thermal short circuit blocking structure

Abstract

The application relates to the technical field of batteries, in particular to a quick-release type honeycomb support for an immersed liquid-cooled lithium battery array and a thermal short-circuit blocking structure, which comprises a honeycomb holder, a hexagonal through groove is arranged in the honeycomb holder, a quick-release protection cylinder is arranged in the hexagonal through groove, a contact curved surface is arranged on the inner wall surface of the hexagonal through groove, and the quick-release protection cylinder increases the contact area with the inner wall surface of the hexagonal through groove through the contact curved surface; the quick-release type honeycomb support for the immersed liquid-cooled lithium battery array is characterized in that: the gap flow channel is formed by cooperation of the honeycomb holder and the quick-release protection cylinder, the immersed liquid can flow up and down conveniently, quick release and replacement can be realized, the battery cell unit and the quick-release protection cylinder are integrated into a fixed structure, the quick-release protection cylinder can be quickly released from the honeycomb holder through a quick-release tool, and the replacement of the battery cell unit can be realized.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to a quick-release cellular support structure and thermal short-circuit blocking structure for immersion liquid-cooled lithium battery arrays. Background Technology

[0002] Immersion liquid-cooled lithium batteries enclose the cell module and coolant in an independent space, allowing the coolant to directly contact the battery and absorb heat. The coolant completely surrounds the battery, eliminating dead zones and controlling the temperature difference between individual cells within ±2℃, resulting in more uniform heat dissipation. The cells in the coolant require supports for positioning and fixation to prevent displacement or shaking. Existing support structures, such as the cell support and battery pack disclosed in CN222927645U, describe a resin component with a second pressure relief hole. The first and second pressure relief holes overlap to form a pressure relief hole for supporting the cylindrical cell. The inner wall of the pressure relief hole has a protruding boss configured to support the cylindrical cell. The boss supports the cylindrical cell, preventing it from falling out. The projected area of ​​the boss within each pressure relief hole is smaller than the projected area of ​​the pressure relief hole itself, ensuring that the pressure relief hole is not completely blocked by the boss.

[0003] This method involves creating circular holes in a plate-like material, inserting cylindrical batteries into these holes for radial positioning, and adding bosses for axial blocking and limiting. However, this not only obstructs the flow of immersion liquid along the axial direction of the cylindrical battery, affecting heat dissipation, but also prevents quick removal of individual cylindrical cells. Because of the boss blocking, the entire plate-like material must be removed to access the cells, making maintenance inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-release cellular support structure and thermal short-circuit blocking structure for immersion liquid-cooled lithium battery arrays, so as to solve the technical problems mentioned in the background art that the existing support structure obstructs the flow of immersion liquid and cannot be quickly released.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick-release cellular support for immersion liquid-cooled lithium battery arrays, comprising a cellular retainer, wherein a hexagonal through-slot is provided through the cellular retainer, and a quick-release protective cylinder is provided in the hexagonal through-slot. A contact arc surface is formed on the inner wall surface of the hexagonal through-slot, and the quick-release protective cylinder increases the contact area with the inner wall surface of the hexagonal through-slot through the contact arc surface; a gap flow channel is formed between the corners of the hexagonal through-slot and the outer wall surface of the quick-release protective cylinder, through which the immersion liquid flows up and down; and further comprising an anchoring component, which is disposed in the inner and outer regions of the quick-release protective cylinder. A rotating slot is also provided on the inner wall of the hexagonal through-slot, and an anchoring insertion hole is provided on the inner wall of the rotating slot. The anchoring component locks the quick-release protective cylinder in the hexagonal through-slot by cooperating with the rotating slot and the anchoring insertion hole.

[0006] It also includes a quick-release tool, which works in conjunction with the anchoring component to unlock the anchoring component and remove the quick-release protective cylinder from the hexagonal through-slot.

[0007] The anchoring assembly includes end holes and collar cavities formed in the inner wall of the quick-release protective cylinder;

[0008] A synchronization collar is provided in the collar cavity, and an unlocking shaft is fixedly provided on the upper surface of the synchronization collar, the unlocking shaft extending into the end hole.

[0009] The lower surface of the synchronizing collar is fixedly provided with a collar spring piece. The collar spring piece provides upward elastic pressure to the synchronizing collar by contacting the bottom of the collar cavity, so that the synchronizing collar has an upward movement tendency.

[0010] The surface of the quick-release protective tube is fixedly provided with a rotating locking block. By rotating the quick-release protective tube, the rotating locking block can be locked into the rotating locking groove, thereby axially limiting the quick-release protective tube relative to the honeycomb retainer.

[0011] The rotating block has a through slot that communicates with the collar cavity. An extension arm is fixedly provided on the outer surface of the synchronous collar. The extension arm is located in the through slot and an anchoring shaft is fixedly provided on the upper part of the extension arm. Under the upward movement of the synchronous collar, the anchoring shaft is inserted into the anchoring hole, so that the quick-release protective cylinder is rotated and limited relative to the honeycomb retainer.

[0012] A thermal short-circuit blocking structure includes a quick-release cellular bracket facing an immersion liquid-cooled lithium battery array and a blocking dual-state cavity; the blocking dual-state cavity is opened inside the quick-release protective cylinder, a first AC port is opened through the upper part of the blocking dual-state cavity, a stepped annular groove is opened on the inner wall surface of the blocking dual-state cavity near the lower part, and a second AC port is opened through the stepped annular groove.

[0013] When the quick-release protective sleeve is installed in place inside the honeycomb retainer, the first and second AC holes correspond to the positions of the gap flow channels.

[0014] Both the first and second AC ports are inclined, so that the immersion liquid flowing through the gap channel can be diverted through the first and second AC ports to the blocking dual-state cavity.

[0015] An outer ring piston is provided in the stepped annular groove, and the outer ring piston is in sealed contact with the stepped annular groove; an inner ring piston is provided on the inner side of the outer ring piston, and the outer ring piston and the inner ring piston are in sealed contact; the inner surface of the inner ring piston is in sealed contact with the blocking dual-state cavity.

[0016] The lower surface of the inner ring piston is provided with a piston ring groove, which is coaxial with the inner ring piston. The side wall of the piston ring groove is provided with an inclined groove.

[0017] A retaining spring is fixedly provided at the lower part of the outer ring piston. The retaining spring is engaged in the inclined groove, so that when the inner ring piston moves upward, the inclined groove and the retaining spring can work together to apply an upward driving force to the outer ring piston. When the outer ring piston cannot move upward, when the upward driving force of the inner ring piston exceeds a set threshold, the retaining spring will move out of the inclined groove, and at this time the inner ring piston moves axially relative to the outer ring piston.

[0018] The quick-release protective cylinder has an L-shaped air duct inside, and a receiving slot is formed on the inner wall surface of the quick-release protective cylinder. The receiving slot is connected to the bottom of the blocking dual-state cavity through the L-shaped air duct.

[0019] The quick-release protective tube has a battery cell unit fixedly installed inside. The battery cell unit is provided with a battery cell pressure relief port, which is sealed and connected to the receiving slot.

[0020] When a thermal short circuit occurs in the battery cell, the gas is released through the battery cell pressure relief port. The gas enters the bottom of the blocking dual-state cavity through the receiving slot and the L-shaped air guide in sequence, driving the outer ring piston and the inner ring piston.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention relates to a quick-release honeycomb support for immersion liquid-cooled lithium battery arrays. It is applied to immersion liquid-cooled lithium battery arrays, and forms a gap flow channel through the cooperation of the honeycomb support and the quick-release protective sleeve, which facilitates the vertical circulation of the immersion liquid and improves the heat transfer efficiency of the immersion liquid. It also enables quick replacement, as the cell unit and the quick-release protective sleeve are an integral fixed structure. The quick-release protective sleeve can be quickly removed from the honeycomb support using a quick-release tool to replace the cell unit, thereby improving maintenance efficiency.

[0023] The thermal short-circuit blocking structure of this invention, in conjunction with a quick-release protective sleeve, can utilize the exhaust pressure during thermal short-circuit pressure relief of the battery cell unit to switch the blocking dual-state cavity from an immersion liquid flow state to an air insulation state, thereby reducing the heat transfer from the battery cell unit to surrounding battery cells during thermal runaway and improving the blocking effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the quick-release honeycomb bracket of the present invention.

[0025] Figure 2 This is a top view of the overall structure of the quick-release honeycomb bracket of the present invention.

[0026] Figure 3This is a schematic diagram of the honeycomb retainer and quick-release tool.

[0027] Figure 4 This is a diagram of a quick-release tool.

[0028] Figure 5 This is a top view of a single-unit structure of a cellular cage.

[0029] Figure 6 This is a schematic diagram of an explosion of a single structure of a honeycomb retainer and a quick-release protective sleeve.

[0030] Figure 7 A three-dimensional half-section view of the end face of a single structure of a honeycomb retainer and quick-release protective sleeve.

[0031] Figure 8 This is a three-dimensional half-section view of the structure at the rotating block.

[0032] Figure 9 A three-dimensional half-section view of the first AC port of a single-unit structure of a honeycomb retainer and quick-release protective sleeve.

[0033] Figure 10 This is a three-dimensional half-section view of the structure of the L-shaped air duct.

[0034] Figure 11 This is a schematic diagram of the quick-release protective sleeve structure.

[0035] Figure 12 This is a schematic diagram of a single-unit structure of a honeycomb cage.

[0036] Figure 13 This is a 3D half-section view of the quick-release protective cylinder.

[0037] Figure 14 This is a schematic diagram of the outer ring piston and the inner ring piston structure.

[0038] In the diagram: 1. Honeycomb retainer; 2. Quick-release protective sleeve; 3. Contact arc surface; 4. Gap flow channel; 5. Rotary slot; 6. Anchoring insertion hole; 7. Quick-release tool; 601. End hole; 602. Collar cavity; 603. Synchronous collar; 604. Unlocking shaft; 605. Collar spring; 606. Rotary locking block; 607. Locking block through slot; 608. Extension arm; 609. Anchoring shaft; 201. Blocking dual-state cavity; 202. First AC port; 203. 204. Stepped ring groove; 205. Second AC port; 206. Outer ring piston; 207. Inner ring piston; 208. Piston ring groove; 209. Angled groove; 2000. Clip spring; 210. L-shaped air guide; 211. Receiving slot; 212. Battery cell unit; 213. Battery cell pressure relief port; 101. Wall groove; 102. Rubber blowing membrane; 701. Anti-slip handle; 702. Assistive screw block; 703. Ejector pin plate; 704. Torque ejector pin. Detailed Implementation

[0039] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0040] Please see Figures 1 to 14 This invention provides a technical solution: a quick-release cellular bracket for immersion liquid-cooled lithium battery arrays, such as... Figure 1 and Figure 6 As shown, a hexagonal through slot is provided through the honeycomb retainer 1, and a quick-release protective sleeve 2 is provided in the hexagonal through slot. A contact arc surface 3 is formed on the inner wall surface of the hexagonal through slot, such as... Figure 5 As shown, the contact arc surface 3 is provided on all six faces of the hexagonal through groove. The quick-release protective cylinder 2 increases the contact area with the inner wall surface of the hexagonal through groove through the contact arc surface 3. It is worth noting that the thickness and dimensions of the honeycomb retainer 1 and quick-release protective cylinder 2 shown in the attached drawings are unrelated to the actual thickness in use. In actual production and use, they can be thicker or thinner than those shown in the attached drawings. A thicker honeycomb retainer 1 and quick-release protective cylinder 2 can improve the support and protection capabilities, while a thinner honeycomb retainer 1 and quick-release protective cylinder 2 can improve the battery energy density. The thickness of the honeycomb retainer 1 and quick-release protective cylinder 2 shown in the attached drawings is only for structural clarity.

[0041] A gap flow channel 4 is formed between the corners of the hexagonal through-slot and the outer wall surface of the quick-release protective cylinder 2. The immersion liquid flows up and down through the gap flow channel 4, such as... Figure 5 As shown, the gap channel 4 is the area between the corner of the hexagonal through groove and the outer wall surface of the quick-release protective cylinder 2, and the cross-section is triangular; it also includes an anchoring component, which is set in the inner and outer areas of the quick-release protective cylinder 2. The inner wall of the hexagonal through groove is also provided with a rotating slot 5, and the inner wall of the rotating slot 5 is provided with an anchoring insertion hole 6. The anchoring component locks the quick-release protective cylinder 2 in the hexagonal through groove by cooperating with the rotating slot 5 and the anchoring insertion hole 6.

[0042] like Figure 4 As shown, the quick-release tool 7 includes an anti-slip handle 701, a levering screw block 702, and a pin plate 703. The levering screw block 702 is integrally injection molded at one end of the anti-slip handle 701, and the pin plate 703 is fixed at the other end by screws. A torsion pin 704 is embedded and fixed on the pin plate 703. The quick-release tool 7 cooperates with the anchoring component to unlock the anchoring component and remove the quick-release protective cylinder 2 from the hexagonal through groove.

[0043] The anchoring assembly includes an end face 601 and a collar cavity 602 formed in the inner wall of the quick-release protective cylinder 2. A synchronizing collar 603 is disposed in the collar cavity 602, and an unlocking shaft 604 is welded and fixedly disposed on the upper surface of the synchronizing collar 603, extending into the end face 601. A collar spring piece 605 is fixedly disposed on the lower surface of the synchronizing collar 603. The collar spring piece 605 provides upward elastic pressure to the synchronizing collar 603 by contacting the bottom of the collar cavity 602, causing the synchronizing collar 603 to have an upward movement tendency.

[0044] The quick-release protective cylinder 2 has a rotating locking block 606 integrally formed on its surface. Rotating the quick-release protective cylinder 2 allows the rotating locking block 606 to engage in the rotating locking groove 5, thereby axially limiting the quick-release protective cylinder 2 relative to the honeycomb retainer 1. The rotating locking block 606 has a locking block through groove 607, which communicates with the collar cavity 602. An extension arm 608 is welded and fixed to the outer surface of the synchronous collar 603, located in the locking block through groove 607. An anchoring shaft 609 is welded and fixed to the upper part of the extension arm 608. With the upward movement of the synchronous collar 603, the anchoring shaft 609 inserts into the anchoring hole 6, thus rotatably limiting the quick-release protective cylinder 2 relative to the honeycomb retainer 1. (See attached diagram.) Figure 7 and attached Figure 8 As shown, when using the quick-release tool 7 of the present invention, the torsion pin 704 is inserted into the end face 601, causing the torsion pin 704 to press against the unlocking shaft 604. The unlocking shaft 604 drives the synchronous collar 603 to move downward, and the extension arm 608 and the anchoring shaft 609 move downward synchronously. The anchoring shaft 609 moves out of the anchoring hole 6, at which time the quick-release protective cylinder 2 can rotate relative to the honeycomb retainer 1. Rotating the anti-slip handle 701, the torsion pin 704 drives the quick-release protective cylinder 2 to rotate through its cooperation with the end face 601. The structure of the rotating slot 5 of the present invention is as follows. Figure 12 As shown, when the quick-release protective cylinder 2 rotates, the rotating block 606 can be unscrewed from the rotating slot 5, and then the rotating block 606 moves out along the gap flow channel 4 to achieve quick release.

[0045] Similarly, during installation, the anchor shaft 609 can be moved downward by twisting the ejector pin 704 to press it, or a certain slope can be opened on the inner upper surface of the rotating slot 5. During the process of rotating the locking block 606 being screwed into the rotating slot 5, the anchor shaft 609 is pressed downward by the slope of the inner upper surface of the rotating slot 5. When the anchor shaft 609 reaches the position of the anchoring hole 6, the anchor shaft 609 automatically pops out and locks.

[0046] A thermal short-circuit blocking structure includes a quick-release cellular support for an immersion liquid-cooled lithium battery array and a blocking dual-state cavity 201. The blocking dual-state cavity 201 is located inside the quick-release protective cylinder 2. A first AC port 202 is provided through the upper part of the blocking dual-state cavity 201. A stepped annular groove 203 is provided on the inner wall surface of the blocking dual-state cavity 201 near the lower part. A second AC port 204 is provided through the stepped annular groove 203.

[0047] When the quick-release protective sleeve 2 is installed in place inside the honeycomb retainer 1, the first AC hole 202 and the second AC hole 204 both correspond to the position of the gap flow channel 4.

[0048] Both the first AC port 202 and the second AC port 204 are inclined, allowing the immersion liquid flowing through the gap channel 4 to be diverted through the first AC port 202 and the second AC port 204 to the blocking dual-state cavity 201. Figure 9 and Figure 12 As shown, a wall groove 101 is formed on the inner wall surface of the hexagonal through groove in the honeycomb retainer 1. The wall groove 101 is located in the corresponding area of ​​the gap flow channel 4. A rubber blowing membrane 102 is sealed in the wall groove 101. When positive pressure gas is filled into the wall groove 101, the rubber blowing membrane 102 can expand. The expansion of the rubber blowing membrane 102 contacts the outer wall surface of the quick-release protective cylinder 2, so that the gap flow channel 4 is blocked and interrupted. The blocking and interruption point is located between the second AC hole 204 and the first AC hole 202. At this time, the immersion liquid can no longer flow up and down through the gap flow channel 4. The technical effect achieved is that, in conjunction with the blocking dual-state cavity 201, the first AC hole 202 and the second AC hole 204, the immersion liquid that should flow up and down along the gap flow channel 4 can flow up and down through the blocking dual-state cavity 201, the first AC hole 202 and the second AC hole 204, which can improve the flow rate of the immersion liquid inside the blocking dual-state cavity 201.

[0049] By controlling the intermittent expansion of the rubber blowing membrane 102, the immersion liquid in the gap channel 4 and the blocking dual-state cavity 201 can be alternately and in large quantities, improving the uniformity of heat dissipation. Gas channels are machined inside the honeycomb retainer 1, allowing the wall grooves 101 to communicate with each other. Specifically, the honeycomb retainer 1 can be divided into upper and lower parts for injection molding, with a semi-circular groove pre-set in the middle. The gas channels are formed by the grooves connecting together. The process is not elaborated further. The gas channels are connected to an external air source to control the air pressure in the wall grooves 101, enabling the rubber blowing membrane 102 to expand intermittently.

[0050] An outer ring piston 205 is provided in the stepped ring groove 203, and the outer ring piston 205 is in sealed contact with the stepped ring groove 203; an inner ring piston 206 is provided inside the outer ring piston 205, and the outer ring piston 205 and the inner ring piston 206 are in sealed contact, and the inner surface of the inner ring piston 206 is in sealed contact with the blocking dual-state cavity 201.

[0051] The lower surface of the inner ring piston 206 is provided with a piston ring groove 207, which is coaxially corresponding to the inner ring piston 206. The side wall of the piston ring groove 207 is provided with a sloped groove 208.

[0052] A retaining spring 209 is fixedly provided at the lower part of the outer ring piston 205. The retaining spring 209 is engaged in the inclined groove 208, so that when the inner ring piston 206 moves upward, the inclined groove 208 and the retaining spring 209 can cooperate to apply an upward driving force to the outer ring piston 205. When the outer ring piston 205 cannot move upward, when the upward driving force of the inner ring piston 206 exceeds a set threshold, the retaining spring 209 will move out of the inclined groove 208. At this time, the inner ring piston 206 moves axially relative to the outer ring piston 205.

[0053] The quick-release protective tube 2 has an L-shaped air duct 210 inside and a receiving slot 211 on the inner wall surface of the quick-release protective tube 2. The receiving slot 211 is connected to the bottom of the blocking dual-state cavity 201 through the L-shaped air duct 210.

[0054] The quick-release protective sleeve 2 has a battery cell unit 212 fixedly installed inside. The battery cell unit 212 is provided with a battery cell pressure relief port 213, which is sealed and connected to the receiving slot 211. When the battery cell unit 212 experiences a thermal short circuit and releases pressure and exhausts gas through the battery cell pressure relief port 213, the gas enters the bottom of the blocking dual-state cavity 201 through the receiving slot 211 and the L-shaped air guide channel 210 in sequence, driving the outer ring piston 205 and the inner ring piston 206.

[0055] The thermal short-circuit blocking structure in this invention, when not triggered, is in the following state: Figure 9 and Figure 10 As shown, the inner ring piston 206 and the outer ring piston 205 are at their lowest positions, and the retaining spring 209 is engaged in the inclined retaining groove 208. At this time, the blocking dual-state cavity 201 is filled with immersion liquid to ensure heat dissipation; the immersion liquid flowing up and down in the gap flow channel 4 can be diverted to the blocking dual-state cavity 201 through the first AC hole 202 and the second AC hole 204, so that the immersion liquid in the blocking dual-state cavity 201 circulates and dissipates heat from the battery cell unit 212.

[0056] When a thermal short circuit occurs in the battery cell 212, the electrolyte inside the battery cell 212 is decomposed, resulting in increased gas pressure. In order to prevent the battery cell 212 from exploding, the prior art will set a battery cell pressure relief port 213 for active pressure relief. In this invention, the battery cell pressure relief port 213 is connected to the receiving slot 211. The pressure relief gas from the battery cell pressure relief port 213 enters the bottom of the blocking dual-state cavity 201 through the receiving slot 211 and the L-shaped air guide channel 210, applying an upward driving pressure to the outer ring piston 205 and the inner ring piston 206. The inclined slot 208 and the locking spring 209 limit the relative displacement between the inner ring piston 206 and the outer ring piston 205 during the initial movement. As the outer ring piston 205 and the inner ring piston 206 move upward together, when the outer ring piston 205 moves to the top edge of the stepped ring groove 203, it will be restricted from moving by the stepped ring groove 203. At this time, the outer ring piston 205 will remain fixed and will block and close the second AC hole 204.

[0057] As the pressure relief port 213 continues to release pressure, the pressure below the inner ring piston 206 increases. When the pressure exceeds the set threshold, the retaining spring 209 will move out of the inclined retaining groove 208 through elastic deformation. At this time, the inner ring piston 206 is released and moves upward along the inner cavity of the blocking dual-state cavity 201, separating from the outer ring piston 205. This continues until the inner ring piston 206 blocks and closes the first AC port 202.

[0058] In this state, both the first AC port 202 and the second AC port 204 at the upper and lower positions of the blocking dual-state cavity 201 are blocked and closed. Furthermore, the blocking dual-state cavity 201 is filled with gas generated from the high-temperature decomposition of the electrolyte, thus switching the blocking dual-state cavity 201 from a state filled with immersion liquid to a state filled with gas. Since gases have larger intermolecular distances compared to liquids, the probability of molecules meeting and colliding is much lower than in liquids. Therefore, gases have extremely low thermal conductivity and better heat insulation effects. In the event of thermal runaway in the battery cell 212, the heat insulation of the blocking dual-state cavity 201 reduces the lateral heating impact on the surrounding battery cell 212, achieving a better blocking effect.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermal short-circuit blocking structure, comprising a quick-release cellular support for an immersion liquid-cooled lithium battery array and a blocking dual-state cavity, characterized in that: A quick-release cellular support for immersion liquid-cooled lithium battery arrays includes a cellular retainer with a hexagonal through slot running through it. A quick-release protective cylinder is installed in the hexagonal through slot. A contact arc surface is formed on the inner wall surface of the hexagonal through slot, and the quick-release protective cylinder increases the contact area with the inner wall surface of the hexagonal through slot through the contact arc surface. The corners of the hexagonal through-slot and the outer wall surface of the quick-release protective cylinder form a gap flow channel, through which the immersion liquid flows up and down; It also includes an anchoring component, which is set in the inner and outer areas of the quick-release protective tube. The inner wall of the hexagonal through groove is also provided with a rotating slot, and the inner wall of the rotating slot is provided with an anchoring hole. The anchoring component locks the quick-release protective tube in the hexagonal through groove by cooperating with the rotating slot and the anchoring hole. It also includes a quick-release tool, which works with the anchoring component to unlock the anchoring component and remove the quick-release protective cylinder from the hexagonal through-slot; The dual-state blocking cavity is located inside the quick-release protective cylinder. A first AC port is provided through the upper part of the dual-state blocking cavity. A stepped annular groove is provided on the inner wall surface of the dual-state blocking cavity near the lower part. A second AC port is provided through the stepped annular groove. An outer ring piston is provided in the stepped annular groove, and the outer ring piston is in sealed contact with the stepped annular groove. An inner ring piston is provided inside the outer ring piston, and the outer ring piston and the inner ring piston are in sealed contact. The inner surface of the inner ring piston is in sealed contact with the dual-state blocking cavity.

2. The thermal short-circuit blocking structure according to claim 1, characterized in that: The anchoring assembly includes end holes and collar cavities formed in the inner wall of the quick-release protective cylinder; A synchronization collar is provided in the collar cavity, and an unlocking shaft is fixedly provided on the upper surface of the synchronization collar, the unlocking shaft extending into the end hole.

3. The thermal short-circuit blocking structure according to claim 2, characterized in that: The lower surface of the synchronizing collar is fixedly provided with a collar spring piece. The collar spring piece provides upward elastic pressure to the synchronizing collar by contacting the bottom of the collar cavity, so that the synchronizing collar has an upward movement tendency.

4. The thermal short-circuit blocking structure according to claim 3, characterized in that: The surface of the quick-release protective tube is fixedly provided with a rotating locking block. By rotating the quick-release protective tube, the rotating locking block can be locked into the rotating locking groove, thereby axially limiting the quick-release protective tube relative to the honeycomb retainer. The rotating block has a through slot that communicates with the collar cavity. An extension arm is fixedly provided on the outer surface of the synchronous collar. The extension arm is located in the through slot and an anchoring shaft is fixedly provided on the upper part of the extension arm. Under the upward movement of the synchronous collar, the anchoring shaft is inserted into the anchoring hole, so that the quick-release protective cylinder is rotated and limited relative to the honeycomb retainer.

5. The thermal short-circuit blocking structure according to claim 1, characterized in that: When the quick-release protective sleeve is installed in place inside the honeycomb retainer, the first and second AC holes correspond to the positions of the gap flow channels.

6. The thermal short-circuit blocking structure according to claim 5, characterized in that: Both the first and second AC ports are inclined, so that the immersion liquid flowing through the gap channel can be diverted through the first and second AC ports to the blocking dual-state cavity.

7. The thermal short-circuit blocking structure according to claim 1, characterized in that: The lower surface of the inner ring piston is provided with a piston ring groove, which is coaxial with the inner ring piston. The side wall of the piston ring groove is provided with an inclined groove.

8. The thermal short-circuit blocking structure according to claim 7, characterized in that: A retaining spring is fixedly provided at the lower part of the outer ring piston. The retaining spring is engaged in the inclined groove, so that when the inner ring piston moves upward, the inclined groove and the retaining spring can work together to apply an upward driving force to the outer ring piston. When the outer ring piston cannot move upward, when the upward driving force of the inner ring piston exceeds a set threshold, the retaining spring will move out of the inclined groove, and at this time the inner ring piston moves axially relative to the outer ring piston.

9. The thermal short-circuit blocking structure according to claim 8, characterized in that: The quick-release protective cylinder has an L-shaped air duct inside, and a receiving slot is formed on the inner wall surface of the quick-release protective cylinder. The receiving slot is connected to the bottom of the blocking dual-state cavity through the L-shaped air duct.

10. The thermal short-circuit blocking structure according to claim 9, characterized in that: The quick-release protective tube has a battery cell unit fixedly installed inside. The battery cell unit is provided with a battery cell pressure relief port, which is sealed and connected to the receiving slot. When a thermal short circuit occurs in the battery cell, the gas is released through the battery cell pressure relief port. The gas enters the bottom of the blocking dual-state cavity through the receiving slot and the L-shaped air guide in sequence, driving the outer ring piston and the inner ring piston.

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