A battery pack fire water tank

Abstract

This utility model discloses a battery pack fire-fighting water tank, which includes a tank body and a lifting mechanism. The tank body is located on one side of the battery pack production workbench, with its top flush with the workbench surface. The tank body includes a shell and a top plate, with the top plate slidably connected to the receiving space and having several through holes. The shell also has a water inlet and a water outlet. The lifting mechanism includes a fixed bracket, a lead screw, a connector, a connecting frame, and a drive motor. The lead screw is rotatably connected to the fixed bracket, the connector is slidably connected to the fixed bracket and threadedly connected to the lead screw, and the two ends of the connecting frame are respectively fixed to the connector and the top plate. The drive motor is connected to the fixed bracket, and its output shaft is connected to the lead screw. The seamless top plate can be used as an extension of the workbench in normal operation, saving space and not interfering with production. When a battery pack overheats, it can be directly pushed to the top plate, and the motor can be started to immerse it in water. The through holes facilitate water infiltration and efficient heat exchange. The water inlet and outlet support water circulation, and the water absorbs heat, isolates oxygen, and prevents reignition. The independently set tank body forms a fire-resistant zone, reducing the risk of fire spread.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery pack fire protection devices, specifically a battery pack fire water tank. Background Technology

[0002] Lithium-ion batteries, as a core component of the new energy industry, are widely used in electric vehicles, energy storage systems, and other fields. Their production process presents a dual challenge to efficiency and safety. Lithium-ion battery thermal runaway is characterized by three main features: high temperature, gas production, and strong re-ignition potential. If not controlled in time, it can trigger a chain reaction of fires in the workshop. Traditional fire-fighting solutions, such as independent fire pools and sprinkler systems, while capable of extinguishing fires, generally suffer from drawbacks such as large space requirements, response delays, and disruption to production processes. For example, lithium-ion battery production lines require continuous operation 24 / 7. Traditional external fire pools require separate land, and transporting battery packs is time-consuming, potentially missing the crucial 30-second cooling window. Furthermore, the water mist from sprinkler systems can pollute the cleanroom environment, affecting the accuracy of battery pack quality testing and increasing production costs.

[0003] Traditional fire-fighting equipment, such as independent water tanks and fire extinguisher cabinets, requires separate installation, disrupting the continuity of workbenches and necessitating detours or additional passageways for operators, thus reducing space utilization. Lithium-ion batteries can experience thermal runaway from overheating to explosion within minutes, while traditional methods of transporting them to external fire pools are time-consuming and can easily miss the optimal cooling period. Furthermore, manual handling of battery packs can exacerbate thermal runaway due to shaking, reducing the success rate of fire suppression. Traditional sprinkler systems rely on external water pressure, impacting the workshop environment and causing unnecessary losses.

[0004] A fire-fighting device for new energy lithium batteries is disclosed in patent application number CN202222929117.0. This device requires a pre-set independent location in the automated warehouse, resulting in fragmented shelving layout, large footprint of a single unit, and the need for a stacker crane to move battery packs, significantly increasing the complexity of workshop logistics. Using this fire-fighting device requires a significant amount of time to move battery packs, which can easily cause the battery packs to miss their optimal cooling period. Utility Model Content

[0005] The purpose of this utility model is to provide a battery pack fire-fighting water tank to solve the following technical problems mentioned in the background art:

[0006] Existing technologies are insufficient to quickly and effectively contain fires caused by thermal runaway of battery packs without disrupting the daily continuous operation of the workbench.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A battery pack fire-fighting water tank includes a tank body and a lifting mechanism. The tank body is located on one side of a battery pack production workbench, and its top is flush with the surface of the workbench. The lifting mechanism is connected to the tank body. The tank body includes a shell and a top plate. The shell has an accommodating space, and the top plate is slidably connected to the accommodating space. The top plate has several through holes, and the shell also has an inlet and a outlet. The lifting mechanism includes a fixed bracket, a lead screw, a connector, a connecting frame, and a drive motor. The lead screw is rotatably connected to the fixed bracket, and the connector is slidably connected to the fixed bracket and threadedly connected to the lead screw. The two ends of the connecting frame are fixedly connected to the connector and the top plate, respectively. The drive motor is connected to the fixed bracket, and the output shaft of the drive motor is connected to the lead screw.

[0009] Furthermore, the pool body has a double-layer structure, consisting of an outer wall and an inner liner, wherein the inner liner is made of corrosion-resistant material.

[0010] Furthermore, an intermediate plate is provided on one side of the shell near the bottom, which divides the containment space into a soaking space at the top and a filtration space at the bottom. A filter port is provided on the intermediate plate, and the soaking space and the filtration space are connected through the filter port.

[0011] Furthermore, a limit post is fixedly connected to the middle plate, and the top plate is slidably connected to the limit post.

[0012] Furthermore, a filter box is installed at the bottom of the middle plate, at the position of the filter port, and a filter element is installed inside the filter box.

[0013] Furthermore, the filter box is detachably connected to the bottom of the middle plate.

[0014] Furthermore, an L-shaped enclosure is fixed to the top of the shell.

[0015] Furthermore, the L-shaped enclosure is 5-15cm high, and a cushioning pad is provided on the side of the enclosure facing the workbench.

[0016] Furthermore, the drive motor is a servo motor, and a limit switch is provided on the fixed bracket. The limit switch is electrically connected to the drive motor to limit the lifting stroke of the top plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The top of the tank is flush with the workbench surface, and the seamless connection of the top plate can serve as an extension area of ​​the workbench without taking up extra space or interfering with routine operations such as battery pack production, assembly, and testing, ensuring a smooth production process.

[0019] When the battery pack overheats, it can be directly pushed to the top plate without complicated handling. Starting the drive motor will immerse the battery pack in water. The through holes in the top plate help the water penetrate in all directions, and efficient heat exchange suppresses thermal runaway.

[0020] The inlet and outlet support water circulation and replacement to ensure continuous cooling. The water can absorb heat and isolate oxygen, thus doubly inhibiting combustion and preventing reignition. The pool is independently set on one side of the workbench, forming a physical fireproof zone and reducing the risk of fire spread. Attached Figure Description

[0021] Figure 1 This is one of the schematic diagrams showing the installation state of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the present invention;

[0024] Figure 4 This is the second schematic diagram of the installation state of this utility model.

[0025] The markings in the diagram are: 1-Workbench, 2-Lifting mechanism, 3-Basin body, 4-Fixed bracket, 5-Connecting frame, 6-Top plate, 7-Enclosure, 8-Shell, 9-Immersion space, 10-Limiting column, 11-Outer wall, 12-Inner liner, 13-Intermediate plate, 14-Filtration space, 15-Filter box, 16-Filter port, 17-Filter element, 18-Drive motor, 19-Lead screw, 20-Connector, 21-Inlet, 22-Drain. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] A battery pack fire-fighting water tank, such as Figure 1 As shown, the fire-fighting water tank includes a tank body 3 and a lifting mechanism 2. The tank body 3 is located on one side of the battery pack production workbench 1, and the top of the tank body 3 is flush with the surface of the workbench 1. The lifting mechanism 2 is connected to the tank body 3. Figure 2 As shown, the pool body 3 includes a shell 8 and a top plate 6. The shell 8 has a receiving space, and the top plate 6 is slidably connected within the receiving space. The top plate 6 has several through holes. Figure 4As shown, the casing 8 is also equipped with a water inlet 21 and a drain outlet 22. The water inlet 21 can be connected to an external cold water source via a pipe, and the drain outlet can be connected to a return water pipe and is equipped with a drain valve. The water circulation system is equipped with a centrifugal pump. Water can be replaced by opening the drain outlet valve to drain water and simultaneously opening the water inlet to replenish water. Figure 3 As shown, the lifting mechanism 2 includes a fixed bracket 4, a lead screw 19, a connector 20, a connecting frame 5, and a drive motor 18; the lead screw 19 is rotatably connected to the fixed bracket 4, the connector 20 is slidably connected to the fixed bracket 4 and threadedly connected to the lead screw 19; the two ends of the connecting frame 5 are fixedly connected to the connector 20 and the top plate 6 respectively; the drive motor 18 is connected to the fixed bracket 4, and the output shaft of the drive motor 18 is connected to the lead screw 19.

[0029] Specifically, when the battery pack on workbench 1 overheats, the operator pushes it horizontally onto the top plate 6 of the tank 3. Since the top of the tank 3 is flush with the surface of workbench 1, it can be transferred directly without lifting, avoiding operational delays caused by height differences. At this time, the drive motor 18 starts, driving the lead screw 19 to rotate through the output shaft. The threaded engagement between the lead screw 19 and the connector 20 converts the rotational motion into linear motion, causing the connector 20 to slide vertically downwards along the fixed bracket 4. The connecting frame 5 synchronously transmits the displacement of the connector 20 to the top plate 6, forcing the top plate 6 to descend vertically within the housing 8's accommodating space. During the descent of the top plate 6, the battery pack enters the water inside the housing 8 along with the top plate 6. The through-hole design on the top plate 6 has a dual function: on the one hand, it allows water to permeate through the pores to the surface of the battery pack during immersion, forming all-around cooling; on the other hand, when the top plate 6 descends, the through-hole can balance the water pressure inside and outside the housing 8, preventing water level fluctuations from affecting the movement of the top plate 6. The water within the containment space absorbs heat from the battery pack through thermal conduction. Simultaneously, the inlet 21 replenishes cold water to maintain a stable water temperature, while the outlet 22 is used for periodic water changes or emptying and cleaning. The drive motor 18 can be started and stopped via a temperature sensor or a manual switch, ensuring a rapid response in case of abnormal battery pack temperature. Manual start-up is achieved via an emergency button installed next to the workbench. Automatic start-up is triggered by a temperature sensor installed on the top plate surface. When the sensor detects that the battery pack surface temperature exceeds 80°C, it automatically sends a signal to the drive motor controller, activating the lifting mechanism to lower the top plate. Furthermore, the mechanical structure driven by the lead screw 19 has a self-locking characteristic, preventing the top plate 6 from accidentally rising due to external force and ensuring the continuity of the cooling process.

[0030] The fire-fighting water tank does not affect the normal operation of the workbench 1 under normal circumstances. The top of the tank body 3 is flush with the surface of the workbench 1. Under normal conditions, the top plate 6 remains closed and seamlessly connected to the surface of the workbench 1, which is equivalent to an extension area of ​​the workbench 1. It does not occupy extra operating space and will not interfere with the workers' routine operations such as battery pack production, assembly, and testing on the workbench 1, ensuring smooth daily production processes. When there is a risk of overheating of the battery pack on the workbench 1, the battery pack can be directly pushed to the top plate 6 without complicated handling operations. The drive motor 18 can be quickly started to drive the lead screw 19 to transmit power, so that the connector 20 pulls the top plate 6 with the battery pack down into the water inside the shell 8 through the connecting frame 5. The through holes on the top plate 6 allow water to penetrate the surface of the battery pack from all directions. Combined with the water pre-filled in the water inlet 21, it achieves efficient heat exchange, quickly absorbs heat to suppress thermal runaway, and has a better cooling efficiency than conventional methods. The inlet 21 and outlet 22 support water circulation and replacement, which can ensure continuous cooling effect. In addition, after the battery pack is fully immersed in water, the water can absorb heat and isolate oxygen, thus doubly inhibiting combustion and preventing reignition. The pool 3 is independently set on one side of the workbench 1, forming a physical fireproof zone.

[0031] In a preferred embodiment, such as Figure 3 As shown, the shell 8 of the pool body 3 has a double-layer structure, comprising an outer wall 11 and an inner liner 12. The inner liner 12 is made of a corrosion-resistant material. The outer wall 11 provides stable structural support, protecting the internal space and water. The inner liner 12, made of corrosion-resistant material, effectively resists leakage of electrolyte, such as carbonates in lithium-ion battery electrolyte, that may leak when the battery pack overheats. This prevents the shell 8 from being corroded and damaged, extending the equipment's lifespan. It also prevents pollution caused by corrosion and ensures effective cooling. Common corrosion-resistant materials for the inner liner 12 include polytetrafluoroethylene (PTFE), 316L stainless steel, and fiberglass.

[0032] In a preferred embodiment, such as Figure 3 As shown, a middle plate 13 is provided on one side of the housing 8 near the bottom. The middle plate 13 divides the accommodating space into a top soaking space 9 and a bottom filtering space 14. A filter port 16 is provided on the middle plate 13, and the soaking space 9 and the filtering space 14 are connected through the filter port 16. Further optimized, a limiting post 10 is fixedly connected to the middle plate 13, and the top plate 6 is slidably connected to the limiting post 10. Further optimized, a filter box 15 is provided at the bottom of the middle plate 13 at the position of the filter port 16, and a filter element 17 is provided inside the filter box 15.

[0033] Specifically, the intermediate plate 13 divides the internal space of the housing 8 into a top immersion space 9 and a bottom filtration space 14. The immersion space 9 allows the battery pack to be immersed in water for cooling. The filtration space 14, in conjunction with the filter port 16 of the intermediate plate 13, allows electrolyte residue, metal fragments, and other impurities that may leak from the battery pack during immersion to enter the bottom through the filter port 16. The filter box 15 and internal filter element 17 at the bottom filter port 16 of the intermediate plate 13 can intercept and filter these impurities, preventing pollution during drainage and preventing blockage of the drain port 22. The limiting post 10 is slidably connected to the top plate 6, which can precisely limit the lifting trajectory of the top plate 6, preventing the top plate 6 from deviating when moving the battery pack up and down, ensuring that the battery pack enters the immersion space 9 stably, and improving the operational stability of the lifting mechanism 2. It should also be noted that the limiting post 10 should be located as far to the side as possible to avoid obstructing the descent of the battery pack. The filter element 17 can be made of a mixture of PP cotton filter element, activated carbon filter element, and glass fiber filter element.

[0034] In a preferred embodiment, such as Figure 3 As shown, the filter box 15 is detachably connected to the bottom of the intermediate plate 13. The filter box 15 can be detachably connected to the intermediate plate 13 via a snap-fit ​​connection or a bolt connection. Because the filter box 15 is detachably connected to the bottom of the intermediate plate 13, when a large amount of electrolyte residue, metal fragments, or other impurities accumulate inside the filter box 15, the operator can directly remove the filter box 15 for cleaning or replacement without disassembling other structures of the tank body 3. This convenient operation avoids long-term accumulation of impurities that could clog the filter port 16 and affect water flow.

[0035] In a preferred embodiment, such as Figure 2 As shown, an L-shaped baffle 7 is fixed to the top of the housing 8. When the battery pack overheats and needs to be pushed to the top plate 6, the L-shaped baffle 7 can limit the battery pack, preventing it from shifting and slipping during the pushing process, ensuring that it lands accurately on the top plate 6, and ensuring that the top plate 6 can then smoothly lower the battery pack into the immersion space 9. At the same time, if a small amount of water splashes up due to shaking during the cooling process of the battery pack, the L-shaped baffle 7 can effectively block the splashed water, preventing it from wetting the ground and affecting the normal operation of other equipment in the workshop.

[0036] In a preferred embodiment, the L-shaped barrier 7 has a height of 5-15cm, and a cushioning pad is provided on the side of the barrier 7 facing the workbench 1. The low height of 5-15cm for the L-shaped barrier 7 will not obstruct the worker's view or hinder hand operations. The cushioning pad on the side of the barrier 7 facing the workbench 1 can cushion the impact force between the battery pack and the barrier 7 when the overheated battery pack is pushed to the top plate 6, preventing damage to the battery pack or electrolyte leakage due to the impact. In an emergency, the low barrier 7 can guide the battery pack to land accurately on the top plate 6, preventing it from slipping and falling, while also blocking a small amount of water splashed during the cooling process to prevent wetting the ground.

[0037] In a preferred embodiment, the drive motor 18 is a servo motor, and a limit switch is provided on the fixed bracket 4. The limit switch is electrically connected to the drive motor 18 to limit the lifting and lowering stroke of the top plate 6. In an emergency, the servo motor can precisely adjust the speed of the lead screw 19 to drive the top plate 6 to rise and fall at a uniform speed, preventing the battery pack from shaking or slipping due to excessive lifting and lowering, and ensuring that it enters the water inside the housing 8 smoothly for cooling. At the same time, the limit switch on the fixed bracket 4 is electrically connected to the servo motor 18, which can accurately set the upper and lower limit strokes of the top plate 6. When rising, the top plate 6 is just flush with the worktable 1, without being too high and obstructing the operation. When descending, it can prevent the top plate 6 from falling too far and colliding with the bottom of the housing 8, protecting the motor 18, lead screw 19 and the structure of the top plate 6 from damage. Moreover, the limit switch can automatically trigger the start and stop of the motor 18, eliminating the need for manual monitoring of the position of the top plate 6, avoiding equipment failure or cooling delay due to operational errors, and taking into account both daily practicality and the safety and accuracy of emergency operation.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery pack fire-fighting water tank, characterized in that: The fire water tank includes a tank body (3) and a lifting mechanism (2). The tank body (3) is located on one side of the battery pack production workbench (1), and the top of the tank body (3) is flush with the surface of the workbench (1). The lifting mechanism (2) is connected to the tank body (3). The pool body (3) includes a shell (8) and a top plate (6). The shell (8) has a receiving space. The top plate (6) is slidably connected to the receiving space. The top plate (6) is provided with several through holes. The shell (8) is also provided with a water inlet (21) and a water outlet (22). The lifting mechanism (2) includes a fixed bracket (4), a lead screw (19), a connector (20), a connecting frame (5), and a drive motor (18). The lead screw (19) is rotatably connected to the fixed bracket (4). The connector (20) is slidably connected to the fixed bracket (4) and threadedly connected to the lead screw (19). The two ends of the connecting frame (5) are fixedly connected to the connector (20) and the top plate (6), respectively. The drive motor (18) is connected to the fixed bracket (4). The output shaft of the drive motor (18) is connected to the lead screw (19).

2. The battery pack fire-fighting water tank according to claim 1, characterized in that: The shell (8) of the pool body (3) has a double-layer structure. The shell (8) includes an outer wall (11) and an inner liner (12), wherein the inner liner (12) is made of corrosion-resistant material.

3. The battery pack fire-fighting water tank according to claim 1, characterized in that: A middle plate (13) is provided on one side near the bottom inside the shell (8). The middle plate (13) divides the accommodating space into a soaking space (9) at the top and a filtering space (14) at the bottom. A filter port (16) is provided on the middle plate (13). The soaking space (9) and the filtering space (14) are connected through the filter port (16).

4. A battery pack fire-fighting water tank according to claim 3, characterized in that: A limiting post (10) is fixedly connected to the middle plate (13), and the top plate (6) is slidably connected to the limiting post (10).

5. A battery pack fire-fighting water tank according to claim 3, characterized in that: A filter box (15) is provided at the bottom of the middle plate (13) at the position of the filter port (16), and a filter element (17) is provided inside the filter box (15).

6. A battery pack fire-fighting water tank according to claim 5, characterized in that: The filter box (15) is detachably connected to the bottom of the middle plate (13).

7. A battery pack fire-fighting water tank according to claim 1, characterized in that: An L-shaped enclosure (7) is fixed to the top of the shell (8).

8. A battery pack fire-fighting water tank according to claim 7, characterized in that: The height of the L-shaped enclosure (7) is 5-15cm, and a buffer pad is provided on the side of the enclosure (7) facing the workbench (1).

9. A battery pack fire-fighting water tank according to claim 1, characterized in that: The drive motor (18) is a servo motor, and a limit switch is provided on the fixed bracket (4). The limit switch is electrically connected to the drive motor (18) to limit the lifting stroke of the top plate (6).

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