Safety type large-scale energy storage protection device

Abstract

The utility model relates to a safe large -scale energy storage protection device, the utility model effectively solves the mechanism that the existing energy storage cabin lacks to specific fault unit carries out fast physical isolation and efficient cooling, is inconvenient for fast isolation and permanent suppression single fault module problem. The safe large -scale energy storage protection device passes through the linkage of support mechanism, adjusting mechanism and monitoring mechanism, when the corresponding monitoring mechanism in a certain storage cavity monitors the heat runaway sign, can immediately trigger the adjusting mechanism below the chamber, releases the locking to the support mechanism, makes the fault module accurate fall into the cooling insulating liquid in the bottom storage box, realizes fast physical isolation and permanent immersion fire extinguishing to the fault unit, fundamentally eliminates the possibility of reignition, and will strictly limit the accident in single chamber, effectively prevents the spread of heat runaway, the protection layer has both can delay the influence of external fire to internal module, also can guarantee electrical safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of energy storage protection devices, specifically relating to a safe large-scale energy storage protection device. Background Technology

[0002] With the rapid development of renewable energy sources such as wind and solar power, electrochemical energy storage systems, as key equipment for smoothing output and peak shaving / frequency regulation, are evolving towards large-scale and high-energy-density applications. Containerized or prefabricated large-scale energy storage power stations are widely used. However, their core storage unit, the lithium-ion battery, is susceptible to thermal runaway under conditions such as overcharging, internal short circuits, and mechanical abuse. During thermal runaway, the battery emits high-temperature, flammable, and toxic gases accompanied by open flames. A failure in a single battery can easily trigger a chain reaction affecting the entire battery cluster or even the entire energy storage module, leading to a catastrophic accident.

[0003] Currently, most battery modules inside energy storage compartments are fixedly installed, lacking a mechanism for rapid physical isolation and efficient cooling of specific faulty units in the early stages of a failure. Once a module experiences thermal runaway, the enormous heat and flames it releases can directly impact adjacent modules through heat conduction, radiation, and convection, causing the disaster to spread rapidly. Therefore, developing a protective device capable of early warning, rapid isolation, and permanent suppression of individual faulty modules is crucial for improving the intrinsic safety level of large-scale energy storage systems. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a safe large-scale energy storage protection device. This safe large-scale energy storage protection device realizes rapid physical isolation and permanent immersion fire extinguishing of the faulty unit, fundamentally eliminating the possibility of reignition, and strictly confining the accident to a single chamber, effectively preventing the spread of thermal runaway.

[0005] A safe large-scale energy storage protection device includes a protective box and a box cover. The bottom of the protective box is fixedly connected to a storage tank for storing cooling insulating liquid. The inside of the protective box is fixedly connected to a partition plate that can divide its interior into multiple storage cavities. The inner surfaces of the protective box and the storage tank, as well as the sides of the partition plate, are all fixedly connected to protective layers for heat insulation and insulation. The bottom of the inside of the protective box is provided with a support mechanism for supporting energy storage modules, and the support mechanism is provided with an adjustment mechanism that can adjust its support state. The box cover is placed on top of the protective box, and its upper surface is provided with a monitoring mechanism that can monitor the internal state of the protective box in real time.

[0006] Preferably, the support mechanism includes a first support plate and a second support plate. The first support plate and the second support plate are both hinged to the bottom of the protective box and are hinged to the same storage cavity below. The first support plate and the second support plate are both in a horizontal state and their hinged parts are respectively located on both sides below the storage cavity.

[0007] Preferably, the number of support mechanisms is the same as the number of storage cavities, and several sets of support mechanisms are respectively sealed at the bottom of several storage cavities.

[0008] Preferably, the adjustment mechanism includes an electric push rod, a movable block, a connecting rod, and a locking plate. The movable block is fixedly connected to the movable end of the electric push rod and slidably connected laterally inside the support mechanism. The fixed end of the electric push rod is laterally fixedly installed inside the support mechanism. Connecting rods are rotatably connected to both sides of the movable block, and a locking plate is rotatably connected to the end of the connecting rod away from the movable block. The locking plates on both sides of the movable block are respectively inserted through both sides of the support mechanism.

[0009] Preferably, the inner wall of the protective box and the side of the partition plate are provided with slots corresponding to the card plates, and the card plates on both sides of the adjustment mechanism are respectively inserted into the corresponding slots.

[0010] Preferably, both the first support plate and the second support plate are provided with an adjustment mechanism, and the adjustment mechanisms in the first support plate and the second support plate are arranged symmetrically.

[0011] Preferably, the monitoring mechanism includes a VOC sensor and a temperature sensor, both of which are fixedly installed on the upper surface of the lid and vertically aligned with the center of the storage cavity.

[0012] Preferably, the number of monitoring mechanisms is the same as the number of storage cavities, and several monitoring mechanisms are respectively fixedly installed at the top of the box cover and at the corresponding positions in the middle of several storage cavities, with the detection ends all passing through the bottom of the box cover.

[0013] The beneficial effects of the above technical solution are as follows:

[0014] This safe, large-scale energy storage protection device, through the linkage of the support mechanism, adjustment mechanism, and monitoring mechanism, can immediately trigger the adjustment mechanism below the storage cavity when the corresponding monitoring mechanism detects signs of thermal runaway. This releases the lock on the support mechanism, allowing the faulty module to fall precisely into the cooling insulation liquid in the bottom storage tank. This achieves rapid physical isolation and permanent immersion fire extinguishing of the faulty unit, fundamentally eliminating the possibility of reignition and strictly confining the accident to a single cavity, effectively preventing the spread of thermal runaway. The protective layer has excellent heat insulation and insulation properties, which can not only delay the impact of external fire on internal modules but also ensure electrical safety, making it more convenient for large-scale energy storage systems. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled state of the box lid of this utility model;

[0017] Figure 3 This is a schematic diagram of the disassembled support mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram showing the disassembled state of the support mechanism and adjustment mechanism of this utility model;

[0019] Figure 5 This is a frontal cross-sectional view of the present invention;

[0020] Figure 6 This is a side view sectional diagram of the present invention.

[0021] In the diagram: 1. Protective box; 2. Box lid; 3. Storage box; 4. Divider plate; 5. Protective layer; 6. Support mechanism; 601. First support plate; 602. Second support plate; 7. Adjustment mechanism; 701. Electric push rod; 702. Movable block; 703. Connecting rod; 704. Card plate; 8. Monitoring mechanism; 801. VOC sensor; 802. Temperature sensor; 9. Card slot; 10. Overflow pipe; 11. Sealing strip. Detailed Implementation

[0022] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The embodiments are described in detail below.

[0023] This embodiment provides a safe large-scale energy storage protection device, as shown in the attached figure. Figure 1 and 2As shown, the device includes a protective box 1 and a box cover 2. The bottom of the protective box 1 is fixedly connected to a storage box 3 for storing cooling insulation liquid. The top of both sides of the storage box 3 are connected to overflow pipes 10. The inside of the protective box 1 is fixedly connected to a partition plate 4 that can divide the inside into multiple storage cavities. The number of overflow pipes 10 is the same as the number of storage cavities, and each overflow pipe 10 corresponds to one storage cavity. When the energy storage unit in the storage cavity falls into the cooling insulation liquid in the storage box 3, the excess liquid can be discharged outward from the overflow pipes 10, which facilitates the collection of unused cooling insulation liquid.

[0024] As attached Figure 5 and 6 As shown, the inner surfaces of the protective box 1 and the storage box 3, as well as the sides of the partition plate 4, are all fixedly connected with protective layers 5 for heat insulation and electrical insulation. The lower surface of the box cover 2 is also fixedly connected with a protective layer 5. The material of the protective layer 5 is a high-temperature resistant ceramic fiber layer, which can be used for direct heat insulation and electrical insulation to prevent the external protective box 1 and box cover 2 from becoming electrified when the energy storage module experiences thermal runaway or leakage, thus ensuring personnel safety. The bottom of the protective box 1 is equipped with a support mechanism 6 for supporting the energy storage module. Specifically, see attached... Figure 3 and 4 As shown, the support mechanism 6 in this utility model includes a first support plate 601 and a second support plate 602. The first support plate 601 and the second support plate 602 are both hinged to the bottom of the protective box 1 and are hinged to the same storage cavity below. The first support plate 601 and the second support plate 602 are both in a horizontal state and their hinged parts are respectively located on both sides below the storage cavity. The ends of the first support plate 601 and the second support plate 602 away from the hinged parts are close to each other, which can seal the bottom of the storage cavity and facilitate the support of the energy storage module.

[0025] In one optional embodiment, the number of support mechanisms 6 is the same as the number of storage cavities, and several sets of support mechanisms 6 are respectively sealed at the bottom of several storage cavities, which can support the energy storage module in each storage cavity and ensure that the energy storage module is above the cooling insulating liquid and does not come into contact with it.

[0026] The support mechanism 6 is internally equipped with an adjustment mechanism 7 that can adjust its support state, as detailed in the attached diagram. Figure 4As shown, the adjustment mechanism 7 includes an electric push rod 701, a movable block 702, a connecting rod 703, and a locking plate 704. The movable block 702 is fixedly connected to the movable end of the electric push rod 701 and slidably connected to the inside of the support mechanism 6. The fixed end of the electric push rod 701 is fixedly installed inside the support mechanism 6. The two sides of the movable block 702 are rotatably connected to the connecting rod 703, and the end of the connecting rod 703 away from the movable block 702 is rotatably connected to the locking plate 704. The locking plates 704 on both sides of the movable block 702 are respectively inserted into the two sides of the support mechanism 6. The inner side wall of the protective box 1 and the side of the partition plate 4 are provided with slots 9 corresponding to the locking plates 704. The locking plates 704 on both sides of the adjustment mechanism 7 are respectively inserted into the corresponding slots 9. The first support plate 501 and the second support plate 502 are both provided with adjustment mechanisms 7, and the adjustment mechanisms 7 in the first support plate 501 and the second support plate 502 are symmetrically arranged.

[0027] The movable end of the electric push rod 701 extends outward, driving the movable block 702 to move. This causes the clamping plates 704 on both sides to be pushed outward and inserted into the corresponding slots 9 via the connecting rods 703 on both sides. This provides stable support for the first support plate 601 and the second support plate 602, ensuring that the first support plate 601 and the second support plate 602 can support the energy storage module in the storage cavity. Similarly, when the movable end of the electric push rod 701 retracts inward, it drives the movable block 702 to move closer to the electric push rod 701. This causes the clamping plates 704 on both sides to retract inward via the connecting rods 703, disengaging the clamping plates 704 from the corresponding slots 9. After losing the support of the adjustment mechanism 7, the first support plate 601 and the second support plate 602 will rotate downward, causing the energy storage module in the storage cavity to fall into the cooling insulating liquid below.

[0028] In one optional embodiment, the number of connecting rods 703 and locking plates 704 on the same side of the movable block 702 can be several. Several locking rods 704 are horizontally inserted through the side of the first support plate 601 or the second support plate 602, which can provide more stable support for the first support plate 601 and the second support plate 602.

[0029] The cover 2 is installed on top of the protective box 1. A sealing strip 11 is fixedly connected to the inner top wall of the cover 2, and a groove adapted to the sealing strip 11 is opened on the top of the protective box 1. When the cover 2 is fixed to the top of the protective box 1 with bolts, the sealing strip 11 is inserted into the groove, which can seal the top of each storage cavity and prevent the gas in each storage cavity from interfering with each other and affecting the accuracy of the monitoring mechanism 8. The upper surface of the cover 2 is provided with a monitoring mechanism 8 that can monitor the internal state of the protective box 1 in real time. The monitoring mechanism 8 includes a VOC sensor 801 and a temperature sensor 802. Sensors 802 are all fixedly installed on the upper surface of the cover 2 and vertically corresponding to the middle of the storage cavity. The number of monitoring mechanisms 8 is the same as the number of storage cavities. Several monitoring mechanisms 8 are fixedly installed on the top of the cover 2 and at the corresponding positions in the middle of several storage cavities, and the detection ends are all inserted through the bottom of the cover 2. When the electrolyte vapor evaporates abnormally, volatile organic compound gas will be generated. The VOC sensor 801 can monitor the energy storage module in the storage cavity below. The temperature sensor 802 can monitor the temperature of the energy storage module in real time. The two work together to determine in time whether the energy storage module has thermal runaway.

[0030] Several electric actuators 701, VOC sensors 801, and temperature sensors 802 are all electrically connected to an external control unit and electrically connected to an external circuit via wires. When the VOC sensor 801 and temperature sensor 802 above a storage cavity detect abnormal evaporation of electrolyte vapor or a sharp rise in temperature, the control unit determines it as a thermal runaway warning and immediately controls the movable ends of the electric actuators 701 in the first support plate 601 and the second support plate 602 below the energy storage module to retract, thereby separating the two side plates 704 from the slots, causing the first support plate 601 and the second support plate 602 to lose support. Under its own gravity, the energy storage module falls from the storage cavity and is directly immersed in the pre-stored cooling insulating liquid below. The energy storage module is completely immersed in the coolant, instantly isolated from oxygen and efficiently cooled, and the thermal runaway reaction is rapidly suppressed. Any flames that may be generated are suffocated inside the liquid, and high-temperature gases and particles are also captured by the liquid, thus preventing more serious damage to other energy storage modules.

[0031] In summary, the operating steps of this safe large-scale energy storage protection device are as follows:

[0032] 1. In the initial state, all electric push rods 701 in the support mechanism 6 are in the extended state. The connecting rod 703 pushes out the two side plates 704 and inserts them firmly into the slots 9 on the inner side wall of the protective box 1 and the side of the partition plate 4, ensuring that the energy storage module is suspended above the surface of the cooling insulating liquid in the storage box 3, and that the energy storage module is placed in each storage space.

[0033] 2. During system operation, each monitoring unit 8 continuously transmits the collected gas concentration and temperature data to the external control unit. The algorithm within the control unit performs cross-analysis and judgment on the data; when any storage cavity simultaneously experiences the following conditions:

[0034] The VOC sensor 801 detected that the concentration of volatile organic compounds exceeded a preset safety threshold;

[0035] Temperature sensor 802 detected an abnormal increase in module temperature that exceeded the set limit;

[0036] The control unit will determine within milliseconds whether the energy storage module in the cavity has experienced a thermal runaway warning or initial thermal runaway.

[0037] 3. Once the control unit confirms that the energy storage module in a specific storage cavity has failed, it will immediately send a retraction command to the electric push rod 701 inside the corresponding first support plate 601 and second support plate 602 below the cavity. The movable end of the electric push rod 701 will quickly retract, driving the movable block 702 to move towards the electric push rod body. The movable block 702 will drive the locking plate 704 to simultaneously disengage and retract from the corresponding locking slot 9 through the connecting rods 703 on both sides. The first support plate 601 and the second support plate 602 will instantly lose their lateral locking support and, under the action of their own gravity and the weight of the energy storage module, will rotate downwards around the hinge axis, just like two double doors being opened instantly. The failed energy storage module will lose its support and fall directly into the cooling insulation liquid in the storage tank 3 below under the action of gravity, and will be completely submerged.

[0038] 4. After the faulty energy storage module is submerged, the cooling insulating liquid quickly isolates it from oxygen and absorbs the large amount of heat it releases, instantly extinguishing any possible open flames and effectively suppressing the continuous exothermic chemical reaction inside, fundamentally preventing reignition. Furthermore, the energy storage module falling into the liquid causes the liquid level to rise, and the excess liquid and any air bubbles that may be trapped are discharged to the external collection device through the overflow pipe 10 connected to the storage cavity, preventing excessive pressure inside the tank and facilitating the subsequent recycling of the uncontaminated cooling insulating liquid.

[0039] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A safety-type large-scale energy storage protection device, comprising a protective box (1) and a box cover (2), characterized in that: The bottom of the protective box (1) is fixedly connected to a storage box (3) for storing cooling insulating liquid. The inside of the protective box (1) is fixedly connected to a partition plate (4) that can divide the inside into multiple storage cavities. The inner surfaces of the protective box (1) and the storage box (3) as well as the sides of the partition plate (4) are all fixedly connected to a protective layer (5) for heat insulation and insulation. The bottom of the inside of the protective box (1) is provided with a support mechanism (6) for supporting the energy storage module, and the inside of the support mechanism (6) is provided with an adjustment mechanism (7) that can adjust its support state. The box cover (2) is placed on the top of the protective box (1), and its upper surface is provided with a monitoring mechanism (8) that can monitor the internal state of the protective box (1) in real time.

2. The safety-type large-scale energy storage protection device according to claim 1, characterized in that: The support mechanism (6) includes a first support plate (601) and a second support plate (602). The first support plate (601) and the second support plate (602) are both hinged to the bottom of the protective box (1) and the first support plate (601) and the second support plate (602) are hinged to the bottom of the same storage cavity. The first support plate (601) and the second support plate (602) are both in a horizontal state and their hinged parts are respectively located on both sides below the storage cavity.

3. A safe large-scale energy storage protection device according to claim 2, characterized in that: The number of support mechanisms (6) is the same as the number of storage cavities, and several sets of support mechanisms (6) are respectively sealed at the bottom of several storage cavities.

4. A safe large-scale energy storage protection device according to claim 1, characterized in that: The adjustment mechanism (7) includes an electric push rod (701), a movable block (702), a connecting rod (703), and a locking plate (704). The movable block (702) is fixedly connected to the movable end of the electric push rod (701) and slidably connected to the inside of the support mechanism (6). The fixed end of the electric push rod (701) is fixedly installed inside the support mechanism (6). The two sides of the movable block (702) are rotatably connected to the connecting rod (703), and the end of the connecting rod (703) away from the movable block (702) is rotatably connected to the locking plate (704). The locking plates (704) on both sides of the movable block (702) are respectively inserted through the two sides of the support mechanism (6).

5. A safe large-scale energy storage protection device according to claim 4, characterized in that: The inner wall of the protective box (1) and the side of the partition plate (4) are provided with slots (9) corresponding to the card plate (704). The card plates (704) on both sides of the adjustment mechanism (7) are respectively inserted into the corresponding slots (9).

6. A safe large-scale energy storage protection device according to claim 2, characterized in that: The first support plate (601) and the second support plate (602) are both provided with adjustment mechanisms (7), and the adjustment mechanisms (7) in the first support plate (601) and the second support plate (602) are arranged symmetrically.

7. A safe large-scale energy storage protection device according to claim 1, characterized in that: The monitoring mechanism (8) includes a VOC sensor (801) and a temperature sensor (802), both of which are fixedly installed on the upper surface of the cover (2) and vertically corresponding to the middle of the storage cavity.

8. A safe large-scale energy storage protection device according to claim 7, characterized in that: The number of monitoring mechanisms (8) is the same as the number of storage cavities. Several monitoring mechanisms (8) are fixedly installed on the top of the box cover (2) and at the corresponding positions in the middle of several storage cavities, and the detection ends are all installed below the box cover (2).

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