High safety self-submerged energy storage system

Abstract

The utility model provides a kind of high safety self-submerging energy storage system, including foundation, water tank is opened on the foundation, the water level in the water tank meets container can be completely submerged container after falling into water tank, multiple support systems are arranged on the foundation, multiple the support system is close to the water tank arrangement, one end of the support system extends to water tank above and supports the container, the container is slidably connected with the support system, the length of the support system is telescopic, so that it can cancel the support to container, so that container falls into water tank the utility model passes through water body isolation oxygen, completely eliminates the risk of afterburning, greatly improves the safety and reliability of energy storage system.

Description

Technical Field

[0001] This utility model relates to the field of energy storage container technology, specifically to a high-safety self-immersion energy storage system. Background Technology

[0002] Current protective measures for energy storage systems in the event of battery thermal runaway mainly rely on traditional active or passive fire suppression methods, including: fire sprinkler systems: covering and cooling the energy storage unit with water or specialized fire extinguishing liquids to reduce the rate of thermal runaway spread; portable fire extinguishers: allowing on-site operators to directly apply chemical or gaseous extinguishing agents to locally extinguish the burning battery; and fixed fire-resistant isolation devices: isolating the energy storage unit from the surrounding environment through physical barriers to delay the spread of fire. These solutions are widely used in traditional energy storage projects and can control fire development and battery temperature rise to a certain extent, but are still limited by operating methods, response speed, and coverage area.

[0003] The following problems exist: 1. Significant personnel safety risks: Firefighting operations must be carried out close to the thermally runaway battery module, and high temperatures, smoke and toxic gases pose a significant threat to on-site personnel; 2. Insufficient firefighting response efficiency: Traditional sprinklers or handheld fire extinguishers cannot quickly cover the entire energy storage unit, making it difficult to effectively suppress the spread of thermal runaway in a short period of time, and there is a risk of fire spreading. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a highly safe self-immersion energy storage system. By isolating oxygen in water, the risk of reignition is completely eliminated, greatly improving the safety and reliability of the energy storage system.

[0005] To address the aforementioned technical problems, this utility model provides a high-safety self-immersion energy storage system, including a foundation, on which a water tank is formed. The water level in the water tank is sufficient to completely submerge a container after it falls into the tank. Multiple support systems are installed on the foundation, arranged close to the water tank. One end of each support system extends above the water tank and supports the container. The container is slidably connected to the support system. The length of the support system is extendable, allowing it to be removed from the container, thus enabling the container to fall into the water tank.

[0006] In some embodiments, the support system includes a push rod mechanism and a support assembly. The support assembly includes a fixed base and a support base. The fixed base is fixed to the foundation, and the support base is slidably disposed on the fixed base. One end of the support base extends above the water tank, and a groove is formed at the top of the end of the support base extending above the water tank. The bottom of the container is slidably connected to the support base through the groove. The push rod mechanism is connected to the support base and is used to control the support base to slide along the fixed base, thereby realizing the length extension and retraction of the support system.

[0007] In some embodiments, the slide is arranged at an angle, with the end of the slide away from the fixed base tilting downwards.

[0008] In some embodiments, the chute has an arc-shaped cross-section, and a slider is provided at the bottom of the container, the slider being semi-cylindrical.

[0009] In some embodiments, the fixing base is cylindrical, the inner wall of the fixing base is provided with lubricating oil, the support base is located inside the fixing base, and is slidably connected to the fixing base through the lubricating oil.

[0010] In some embodiments, the push rod mechanism includes a hydraulic cylinder and a hydraulic rod, the hydraulic cylinder being fixed to the foundation, the hydraulic rod being coaxially arranged with the support base, and one end of the hydraulic rod being connected to the support base.

[0011] In some embodiments, the hydraulic rod is connected to the support seat via a ball joint.

[0012] In some embodiments, a tension sensor is provided at the connection between the hydraulic rod and the support base.

[0013] In some embodiments, the inner wall and bottom of the water tank are provided with steel plates or reinforced concrete slabs.

[0014] In some embodiments, a liquid level sensor is provided on the inner wall of the water tank.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model monitors the battery status in real time through a battery management system. When a risk of thermal runaway is detected, it can quickly trigger the contraction of the support system, submerging the entire container in a water tank. The rapid cooling of the thermally runaway battery cells by water effectively suppresses flame spread, and the isolation of oxygen by the water completely eliminates the risk of reignition, greatly improving the safety and reliability of the energy storage system.

[0016] 2. The support system of this utility model adopts an inclined chute, which realizes automatic positioning of the container in the X and Y directions, ensuring that it is accurately positioned directly above the water tank. The push rod mechanism is connected by a ball joint and monitored by a tension sensor, which effectively avoids equipment damage caused by uneven loading, ensures that multiple support units operate synchronously, and allows the container to fall into the water tank smoothly and accurately.

[0017] 3. This utility model achieves fully automatic response and processing through a remote control center, ensuring that the system can quickly and accurately perform immersion operations in emergency situations, reducing human intervention delays and preventing the accident from escalating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the container of this utility model; Figure 3 This is a schematic diagram of the support system of this utility model.

[0019] Attached reference numerals: 1-Foundation; 2-Water tank; 3-Container; 31-High voltage box; 32-DC return switch; 33-Low voltage distribution cabinet; 34-Fire protection system; 35-Ventilation system; 36-Pressure relief system; 37-Slider; 4-Support system; 41-Push rod mechanism; 411-Hydraulic cylinder; 412-Hydraulic rod; 413-Solenoid directional valve; 42-Support assembly; 421-Fixed seat; 422-Support seat; 423-Slide groove; 5-Remote control center. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] like Figure 1 As shown, this utility model provides a high-safety self-immersion energy storage system, including a foundation 1, a water tank 2 on the foundation 1, and steel plates or reinforced concrete slabs installed on the inner wall and bottom of the water tank 2. That is, the water tank 2 is surrounded by multiple steel plates or multiple cast-in-place reinforced concrete slabs. A container 3 is located directly above the water tank 2. The water level in the water tank 2 is sufficient to completely submerge the container 3 after it falls into the water tank 2. A liquid level sensor is installed on the inner wall of the water tank 2 so that the water level can be replenished in time when it is insufficient.

[0022] like Figure 2 As shown, container 3 contains six rows of vertically stacked battery packs, which are connected in series via power harnesses to the bottom high-voltage box 31. On the left side are a fire suppression system 34, a low-voltage distribution cabinet 33, and a DC return switch 32. The front door of container 3 has openings for two ventilation systems 35 and one pressure relief system 36. The fire suppression system 34, ventilation system 35, and pressure relief system 36 are all existing technologies. They are all connected to the battery management system, which controls the operation of the fire suppression system 34, ventilation system 35, and pressure relief system 36 based on sensors inside the battery packs.

[0023] like Figure 1As shown, multiple support systems 4 are set on the foundation 1. The multiple support systems 4 are arranged close to the water tank 2. One end of the support system 4 extends above the water tank 2 and supports the container 3. At least four support systems 4 are set, which are used to support the four bottom corners of the container 3 respectively. The container 3 is slidably connected to the support system 4. The length of the support system 4 is telescopic, so that it can be removed from supporting the container 3, thereby allowing the container 3 to fall into the water tank 2.

[0024] like Figure 1 As shown, both the support system 4 and the battery management system (BMS) are connected to the remote control center 5 (CCU central control unit). The remote control center 5 is used to receive abnormal signals from the battery management system and control the contraction of the support system 4. It is understood that when an abnormality occurs in the battery pack inside the container 3, and the fire suppression system 34 is unable to suppress the abnormal battery pack from thermal runaway, the remote control center 5 sends a contraction signal to the control system. Multiple support systems 4 contract simultaneously, and the container 3 falls freely into the water tank 2, which can rapidly cool the thermally runaway battery cells, suppress the spread of flames, and completely eliminate the risk of reignition by isolating oxygen through the water.

[0025] like Figure 3 As shown, the support system 4 includes a push rod mechanism 41 and a support assembly 42. The support assembly 42 includes a fixed seat 421 and a support seat 422. The fixed seat 421 is fixed to the foundation 1 and is cylindrical. The inner wall of the fixed seat 421 is lubricated. The support seat 422 is located inside the fixed seat 421 and is slidably connected to the fixed seat 421 through the lubricating oil. The fixed seat 421 and the support seat 422 are restricted from relative rotation by a key, or the inner wall of the fixed seat 421 is square and the outer wall of the support seat 422 is also square.

[0026] like Figure 3 As shown, one end of the support base 422 extends above the water tank 2. A groove 423 is opened at the top of the end of the support base 422 extending above the water tank 2. The cross-section of the groove 423 is arc-shaped. A slider 37 is provided at the bottom of the container 3. The slider 37 is semi-cylindrical. The slider 37 can fit perfectly with the groove 423, so that the four corners of the bottom of the container 3 can accurately fall on the grooves 423 of the four support systems 4.

[0027] To ensure the further positioning of container 3 and its smooth entry into water tank 2, chute 423 is arranged at an angle, with the end of chute 423 away from fixed seat 421 tilting downwards, and lubricating oil is provided inside chute 423.

[0028] Understandably, the cooperation of slider 37 and chute 423 restricts the Y-direction of container 3 (the Y-direction is perpendicular to the sliding direction of support 422 and parallel to the ground); through the inclined arrangement of chute 423, multiple chute 423s can restrict the X-direction of container 3 (the X-direction is parallel to the sliding direction of support 422). When container 3 falls on support 422, it can be automatically positioned in both the X and Y directions, placing it directly above water tank 2. Furthermore, when hydraulic rod 412 retracts synchronously, container 3 will not move in the X direction, ensuring that container 3 falls smoothly into water tank 2.

[0029] In addition, a limiting plate is also provided on the support base 422. The limiting plate is set inside or outside the slide 423. After the container 3 is lifted above the water tank 2 by a crane and placed on multiple support bases 422, multiple hydraulic rods 412 extend to a preset distance at the same time, so that the limiting plate presses and fixes the container 3.

[0030] like Figure 3 As shown, the push rod mechanism 41 includes an electromagnetic directional valve 413, a hydraulic cylinder 411, and a hydraulic rod 412. The hydraulic cylinder 411 is fixed on the foundation 1. The electromagnetic directional valve 413 controls the oil circuit, causing the hydraulic rod 412 to extend or retract. The hydraulic rod 412 is coaxially arranged with the support base 422, and one end of the hydraulic rod 412 is connected to the support base 422 via a ball joint. The connection between the hydraulic rod 412 and the support base 422 via the ball joint prevents the bending moment on the support base 422 from being transmitted to the hydraulic rod 412, and allows the hydraulic rod 412 to adapt to small angular deviations, avoiding damage to the push rod due to uneven force caused by the off-center loading of the container 3.

[0031] Furthermore, a tension sensor is installed at the connection between the hydraulic rod 412 and the support base 422, which can monitor the force and feed it back to the central control unit to achieve overload protection and synchronous control.

[0032] It should be noted that the hydraulic cylinder 411 and the fixed base 421 mentioned above are both fixed to the foundation 1 by the foundation. The hydraulic cylinder 411 and the fixed base 421 can be fixed to the foundation by anchor bolts. The foundation is a concrete foundation. Figure 1 and Figure 3 (The basic structure is not shown in the image).

[0033] The working principle of this high-safety self-immersion energy storage system is as follows: ① Early warning monitoring (triggering conditions): The battery management system acquires the temperature and smoke status of each battery pack, as well as the internal temperature and smoke status of container 3, in real time. When at least two battery cells are detected to have an independent temperature exceeding 80°C and a smoke alarm is triggered, a command is sent to the CCU (Central Control Unit) to enter the preparation for sinking state. The battery management system automatically records the trigger time, and camera snapshots are used for tracing the source.

[0034] ②Preliminary confirmation and broadcast: CCU performs self-tests: communication, controller status and log archiving; activates audible and visual alarms and remotely notifies the site maintenance center; status switches to preparation for sinking.

[0035] ③Preparation for sinking: Electrical isolation: The BMS issues a disconnect command, and the main circuit breaker of the low-voltage room distribution cabinet 33 disconnects; the main circuit breaker reports "disconnection successful", and the bus voltage drops to <50V; if the main circuit breaker fails to disconnect or the voltage does not drop to a safe voltage, the descent is stopped and an alarm is triggered.

[0036] Water level check: Confirm that the liquid level in tank 2 is ≥3m (preset sinking depth) and there is no leakage. If the liquid level is insufficient, automatically replenish the liquid.

[0037] ④ Sinking: The CCU enters "sinking mode," and multiple hydraulic rods 412 retract synchronously. The CCU reads the tension measured by the tension sensor. If the tension is abnormal or the hydraulic rods 412 are not synchronized, the sinking is stopped and an alarm is triggered.

[0038] ⑤ Post-processing (long-term monitoring and recovery): Maintain electrical isolation and continuously monitor temperature and liquid level. If the system is stable (after 24 hours), drain the water in tank 2 to a safe water pool.

[0039] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A high-safety self-immersion energy storage system, characterized in that: The system includes a foundation (1), on which a water tank (2) is opened. The water level in the water tank (2) is such that the container (3) can be completely submerged after it falls into the water tank (2). Multiple support systems (4) are set on the foundation (1). The multiple support systems (4) are arranged close to the water tank (2). One end of the support system (4) extends above the water tank (2) and supports the container (3). The container (3) is slidably connected to the support system (4). The length of the support system (4) is extendable, so that it can cancel the support for the container (3), thereby allowing the container (3) to fall into the water tank (2).

2. The high safety self-submergence energy storage system of claim 1, wherein: The support system (4) includes a push rod mechanism (41) and a support assembly (42). The support assembly (42) includes a fixed seat (421) and a support seat (422). The fixed seat (421) is fixed on the foundation (1). The support seat (422) is slidably disposed on the fixed seat (421). One end of the support seat (422) extends above the water tank (2). A groove (423) is opened at the top of the end of the support seat (422) extending above the water tank (2). The bottom of the container (3) is slidably connected to the support seat (422) through the groove (423). The push rod mechanism (41) is connected to the support seat (422) and is used to control the support seat (422) to slide along the fixed seat (421), thereby realizing the length extension and retraction of the support system (4).

3. The high-safety self-immersion energy storage system according to claim 2, characterized in that: The slide (423) is arranged at an angle, with the end of the slide (423) away from the fixed seat (421) tilting downward.

4. The high safety self-submergence energy storage system of claim 2, wherein: The cross-section of the chute (423) is arc-shaped, and a slider (37) is provided at the bottom of the container (3). The slider (37) is semi-cylindrical and is used to cooperate with the chute (423).

5. The high-safety self-immersion energy storage system according to claim 2, characterized in that: The fixed seat (421) is cylindrical, and the inner wall of the fixed seat (421) is provided with lubricating oil. The support seat (422) is located inside the fixed seat (421) and is slidably connected to the fixed seat (421) through the lubricating oil.

6. The high-safety self-immersion energy storage system according to claim 2, characterized in that: The push rod mechanism (41) includes a hydraulic cylinder (411) and a hydraulic rod (412). The hydraulic cylinder (411) is fixed on the foundation (1). The hydraulic rod (412) is coaxially arranged with the support seat (422). One end of the hydraulic rod (412) is connected to the support seat (422).

7. The high-safety self-immersion energy storage system according to claim 6, characterized in that: The hydraulic rod (412) is connected to the support base (422) by a ball joint.

8. The high safety self-submergence energy storage system of claim 6, wherein: A tension sensor is installed at the connection between the hydraulic rod (412) and the support base (422).

9. The high safety self-submergence energy storage system of claim 1, wherein: The inner wall and bottom of the water tank (2) are provided with steel plates or reinforced concrete slabs.

10. The high-safety self-immersion energy storage system according to claim 1, characterized in that: A liquid level sensor is installed on the inner wall of the water tank (2).

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