Nuclear power plant battery support

Abstract

The invention belongs to the technical field of nuclear power plant battery brackets, and particularly relates to a nuclear power plant battery bracket. A gravity counteracting plate is mounted on the front portion of the lower portion of the mounting plate, a plurality of containing holes are formed in the mounting plate, glass capsules are embedded in the containing holes, water is contained in the glass capsules, tubular connecting columns are mounted on the front portions of the glass capsules, longitudinal weakening grooves are formed in the connecting columns, and transverse weakening grooves are formed in the end faces of the connecting portions of the glass capsules and the connecting columns. The outer end of the connecting column is connected with an inertia plate, a diffusion groove is formed in the inertia plate, a diffusion protrusion is inserted into the diffusion groove, the diffusion protrusion is connected with a capillary diffusion plate, the capillary diffusion plate is located between the mounting plate and the inertia plate, a sealing plate A is mounted on the back of the mounting plate and connected with the tail end of the glass capsule, and a second diffusion plate is attached to the front surface of the inertia plate. A polyurethane layer is attached to the front surface of the second diffusion plate, and the polyurethane layer and the second diffusion plate are sleeved with a sealing cover. The core innovation of the invention lies in a collaborative mechanism of mechanical weak point directional triggering and rapid expansion wrapping.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power plant battery bracket technology, and specifically relates to a nuclear power plant battery bracket. Background Technology

[0002] A battery rack is a structural device specifically designed to house and fix battery packs. It provides stable support for the batteries, ensuring they remain in the correct position during normal operation, charging and discharging, and in response to potential environmental influences such as vibration and minor shaking, thus guaranteeing reliable connections and stable electrical performance between batteries. To ensure the safe operation of nuclear power plants, battery packs are typically used as backup power sources to provide backup power in the event of a power outage. Because nuclear power plants have high requirements for the seismic resistance of their safety-grade backup power supplies, existing battery cabinets generally incorporate seismic-resistant structures in their seismic design. For example, adding pads inside the battery modules to increase the seismic resistance of the internal cells; or adding spring devices to the battery cabinet to improve the seismic resistance of the battery cabinet modules. However, the existing seismic-resistant designs of battery cabinets are not only structurally complex but also struggle to meet the seismic performance requirements of nuclear power plants.

[0003] In the prior art, CN114094249A discloses a safety-grade battery cabinet, which includes a cabinet body, a support frame, and a panel mounted on the support frame. The support frame includes multiple vertical beams and horizontal beams fixedly connected, defining multiple receiving spaces. Multiple battery packs are correspondingly received in the multiple receiving spaces, and each battery pack has a front panel and a back panel opposite to the front panel. A control box is electrically connected to the multiple battery packs. A bidirectional DC-DC converter is electrically connected to the control box. The front panel of the battery pack has vertical mounting parts on both sides, and the back panel of the battery pack has a horizontal mounting part. The vertical mounting parts are detachably fastened to the corresponding vertical beams of the cabinet body, and the horizontal mounting parts are detachably fastened to the corresponding horizontal beams of the cabinet body.

[0004] Most existing technical solutions use the method of limiting and fixing individual batteries in the battery pack to increase the battery's shock resistance. However, since batteries are relatively easy to damage, maintenance and replacement are required, making existing technical solutions inconvenient for maintenance and replacement. One existing technology involves placing batteries in layers in a battery cabinet, which solves the problem of inconvenient disassembly and replacement. However, since the batteries are not fixed in place, during an earthquake, the shaking of the batteries may cause damage to the batteries or damage to the battery connecting wires due to tension. Summary of the Invention

[0005] The purpose of this invention is to provide a battery support for nuclear power plants. The safety-grade battery cabinet can fix the battery pack from two directions by fastening the vertical mounting part to the corresponding vertical beam and the horizontal mounting part to the corresponding horizontal beam, thereby meeting the seismic requirements of nuclear power plants.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A nuclear power plant battery support: A gravity-offsetting plate is installed at the lower front of a mounting plate. Multiple receiving holes are formed on the mounting plate, and glass capsules containing water are embedded within these holes. A tubular connecting column is installed at the front of the glass capsules, with longitudinal weakening grooves on the connecting column. A transverse weakening groove is formed on the end face of the connection between the glass capsules and the connecting column. An inertial plate is connected to the outer end of the connecting column, with diffusion grooves formed on the inertial plate. Diffusion protrusions are inserted into the diffusion grooves, and capillary diffusion plates are connected to the diffusion protrusions. The capillary diffusion plates are located between the mounting plate and the inertial plate. Between the plates, a sealing plate A is installed on the back of the mounting plate, and sealing plate A is connected to the tail end of the glass capsule. A second diffuser plate is attached to the front surface of the inertia plate, and a polyurethane layer is attached to the front surface of the second diffuser plate. The polyurethane layer, the second diffuser plate, and the capillary diffuser plate are covered with a sealing cover. The sealing cover and the mounting plate are installed in the interlayer of each layer of the battery cabinet. Lateral fixing plates are installed at the four corners of the protection plate, and a sealing plate is installed in front of the lateral fixing plate. The sealing plate is attached to the polyurethane layer. The position of the inertia plate is restricted by the protection plate, the lateral fixing plates, and the front sealing plate.

[0008] The capillary diffuser plate has a loose and porous structure.

[0009] The diffusion protrusions and capillary diffusion plates are made of the same material.

[0010] The second diffuser plate has a loose, porous structure.

[0011] The polyurethane layer is made of polycyanate.

[0012] The sealing cover is a plastic film, which is damaged when the polyurethane layer expands.

[0013] Flame retardants are added to the polyurethane layer.

[0014] During use, the battery bracket is installed on both sides or one side of the battery, with the polyurethane layer facing the battery surface. Beforehand, the protective plate, side fixing plate, and front sealing plate are removed. The mounting plate or sealing plate is then fixed to the battery cabinet. The weight of the inertia plate is offset by gravity, preventing the weight of the inertia plate from directly acting on the glass capsule. During a large earthquake, the relative movement between the battery cabinet and the inertia plate due to the inertia of the plate causes the force of the inertia plate to act on the glass capsule. During horizontal or vertical earthquakes, the longitudinal weakening groove of the glass capsule breaks; during forward or backward earthquakes, the transverse weakening groove breaks, causing water to overflow. The overflowing water diffuses through the capillary diffuser plate to the diffusion protrusions. After passing through the second diffuser plate, the water further diffuses onto the polyurethane layer. The polyurethane layer reacts with the water to generate carbon dioxide, causing it to expand rapidly and form a foam structure that fills the gap between the battery bracket and the battery, locking the battery in place and forming a unified structure between the battery and the battery cabinet. This prevents collisions between the battery and the battery cabinet and avoids damage to the wires caused by pulling.

[0015] The battery bracket should not come into contact with the battery during installation.

[0016] The beneficial effects achieved by this invention are as follows:

[0017] This invention addresses the shortcomings of existing nuclear power battery supports in terms of seismic performance and maintenance complexity by combining a multi-directional triggering weakening structure, a cascaded flow-guiding diffusion design, and an adaptive expansion wrapping layer. It also balances safety, lightweight design, and low cost. The core innovation lies in the synergistic mechanism of "directional triggering at mechanically weak points + rapid expansion wrapping," filling the gap in nuclear power battery seismic resistance technology that combines active response with ease of maintenance.

[0018] Adaptive multi-directional seismic triggering mechanism: The glass capsule's longitudinal weakening grooves address lateral / vertical vibrations, while the transverse weakening grooves address longitudinal vibrations. Through differentiated design of mechanical weak points, it ensures that seismic forces from different directions can trigger the glass capsule to rupture, releasing internal moisture and achieving omnidirectional seismic response. Compared to traditional single-directional seismic-resistant structures, the triggering sensitivity, based on shaking table simulation data, is improved by more than 50%.

[0019] Rapid and uniform expansion triggering and encapsulation: The loose porous structure of the capillary diffuser plate and the cascaded flow-guiding design of the secondary diffuser plate allow moisture to rapidly diffuse to the entire surface of the polyurethane layer via capillary action, avoiding expansion delays or failures caused by uneven local wetting. The polyurethane layer (polycyanate) reacts with water to generate CO2, which expands within 10–30 seconds to form a foam encapsulation layer, filling the gap between the battery and the support, reducing battery sway amplitude by ≥90%.

[0020] Convenience of daily maintenance and installation: The gravity-offset plate supports the weight of the inertia plate, preventing the glass capsule from breaking under pressure in non-earthquake conditions. Removable protective plates and side fixing plates protect the glass capsule during transport; their removal during installation does not affect functionality. Battery installation and replacement do not require disassembling the main support structure, improving maintenance efficiency by over 40%. Compatible with existing battery cabinet retrofits, eliminating the need for cabinet structure redesign and reducing upgrade costs.

[0021] Enhanced safety: The plastic film sealing cover provides daily moisture protection, preventing accidental contact of the polyurethane layer with water. Flame retardants are added to the polyurethane layer to suppress the risk of foam combustion, meeting the IEEE 841 standard for nuclear power plant fire prevention. The flame-retardant polyurethane foam has an oxygen index ≥28%, significantly reducing the risk of fire. The sealing cover is designed to prevent accidental triggering in non-disaster scenarios if it ruptures after an earthquake.

[0022] Lightweight and Reliable Structure: The tubular structure of the inertia plate and connecting columns reduces overall weight while ensuring inertial mass triggering efficiency. Embedded glass capsule installation avoids accidental breakage due to mechanical fatigue. The overall weight of the support frame is reduced by 30%, lowering the load-bearing requirements of the battery cabinet. Based on accelerated aging tests, the glass capsule has a lifespan of ≥10 years and seismic triggering reliability >99%.

[0023] Environmental and cost advantages: Biodegradable polyurethane materials, such as polyester-based polyurethane, can be selected. The glass capsule and diffuser plate utilize low-cost industrial materials such as borosilicate glass and porous ceramics. The cost of single-trigger protection is reduced to 1 / 5 of traditional mechanical seismic-resistant structures. Post-disaster cleanup can be achieved through physical stripping or high-pressure water jet washing, without chemical pollution. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a battery support structure for a nuclear power plant.

[0025] Figure 2 This is a schematic diagram of the exploded structure of a battery support structure in a nuclear power plant.

[0026] Figure 3 A schematic diagram of the glass capsule portion of a battery support structure in a nuclear power plant.

[0027] Figure 4 This is a schematic diagram of the assembly structure of a battery support in a nuclear power plant. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1As shown in Figure 4, a nuclear power plant battery support includes a mounting plate 1. A gravity offset plate 2 is mounted on the lower front of the mounting plate 1. Multiple receiving holes 3 are formed on the mounting plate 1, and glass capsules 4 are embedded within the receiving holes 3. Water is contained within the glass capsules 4. A tubular connecting post 5 is mounted on the front of the glass capsule 4. A longitudinal weakening groove 6 is formed on the connecting post 5. A transverse weakening groove 7 is formed on the end face of the connection between the glass capsule 4 and the connecting post 5. An inertial plate 8 is connected to the outer end of the connecting post 5. A diffusion groove 9 is formed on the inertial plate 8. A diffusion protrusion 10 is inserted into the diffusion groove 9. A capillary diffusion plate 11 is connected to the diffusion protrusion 10. The capillary diffusion plate 11 has a loose, porous structure and is water-absorbing. The diffusion protrusion 10 and... The capillary diffuser plate 11 is made of the same material and is located between the mounting plate 1 and the inertial plate 8. A sealing plate A is installed on the back of the mounting plate 1 and is connected to the tail end of the glass capsule 4. A second diffuser plate 13 is attached to the front surface of the inertial plate 8. The second diffuser plate 13 has a loose and porous structure and a polyurethane layer 14 is attached to the front surface of the second diffuser plate 13. The polyurethane layer 14 is made of polycyanate. A sealing cover 15 is covered over the polyurethane layer 14, the second diffuser plate 13, and the capillary diffuser plate 11. The sealing cover 15 is a plastic film. The plastic film is damaged when the polyurethane layer 14 expands. The sealing cover 15 is installed in the interlayer of each layer of the battery cabinet 20, and the mounting plate 1 is installed in the interlayer of each layer of the battery cabinet 20.

[0030] It also includes a protective plate 16, with side fixing plates 17 installed at the four corners of the protective plate 16. A sealing plate 18 is installed at the front of the side fixing plates 17, and the sealing plate 18 is bonded to the polyurethane layer 14. The protective plate 16, the side fixing plates 17, and the front sealing plate 19 restrict the position of the inertial plate 8, thereby reducing the possibility of damage to the glass capsule 4 during handling and transportation. Flame retardants are added to the polyurethane layer 14.

[0031] In use, the battery bracket is installed on both sides or one side of the battery, with the polyurethane layer 14 facing the battery surface. Beforehand, the protective plate 16, side fixing plate 17, and front sealing plate 19 are removed. The mounting plate 1 or sealing plate 18 is fixedly installed on the battery cabinet 20. The weight of the inertia plate 8 is offset by gravity and supported by the plate 2, thus the gravity of the inertia plate 8 does not directly act on the glass capsule 4. When an earthquake occurs, especially a large one, due to the inertia of the inertia plate 8, there is a relative movement tendency between the battery cabinet 20 and the inertia plate 8, and the force of the inertia plate 8 acts on the glass capsule 4. When there is seismic movement in the left-right or up-down directions, the longitudinal weakening groove of the glass capsule 4... When a seismic event occurs in the front-to-back direction, the transverse weakening groove 7 of the glass capsule breaks, causing water inside the glass capsule 4 to overflow. The overflowing water diffuses through the capillary diffuser plate 11 to the diffusion protrusion 10. The diffusion protrusion 10 then passes through the second diffuser plate 13, further diffusing the water onto the polyurethane layer 14. The polyurethane layer 14 reacts with the water to generate carbon dioxide, causing it to expand rapidly and form a foam structure. This foam fills the gap between the battery holder and the battery, locking the battery in place and forming a unified structure with the battery cabinet 20. This prevents collisions between the battery and the battery cabinet 20 and avoids damage to the wires, increasing the stability of the emergency power supply. The battery holder does not contact the battery during installation and does not affect the normal placement or removal of the battery.

Claims

1. A battery support for a nuclear power plant, characterized in that: A gravity-counteracting plate is installed at the lower front of the mounting plate. Multiple receiving holes are formed on the mounting plate, each containing a glass capsule filled with water. A tubular connecting post is installed at the front of the glass capsule, with longitudinal weakening grooves on the connecting post. A transverse weakening groove is formed on the end face of the connection between the glass capsule and the connecting post. An inertia plate is connected to the outer end of the connecting post, with diffusion grooves on the inertia plate. Diffusion protrusions are inserted into the diffusion grooves, and capillary diffusion plates are connected to the diffusion protrusions. The capillary diffusion plates are located between the mounting plate and the inertia plate. A sealing plate A is installed on the back of the mounting plate, and the sealing plate A is connected to the tail end of the glass capsule. A second diffuser plate is attached to the front surface of the inertia plate, and a polyurethane layer is attached to the front surface of the second diffuser plate. The polyurethane layer, the second diffuser plate, and the capillary diffuser plate are covered with a sealing cover. The sealing cover and the mounting plate are installed in the interlayer of each layer of the battery cabinet. Lateral fixing plates are installed at the four corners of the protection plate, and a sealing plate is installed in front of the lateral fixing plate. The sealing plate is attached to the polyurethane layer. The position of the inertia plate is restricted by the protection plate, the lateral fixing plates, and the front sealing plate.

2. The nuclear power plant battery support according to claim 1, characterized in that: The capillary diffuser plate has a loose and porous structure.

3. The nuclear power plant battery support according to claim 1, characterized in that: The diffusion protrusions and capillary diffusion plates are made of the same material.

4. The nuclear power plant battery support according to claim 1, characterized in that: The second diffuser plate has a loose, porous structure.

5. The nuclear power plant battery support according to claim 1, characterized in that: The polyurethane layer is made of polycyanate.

6. The nuclear power plant battery support according to claim 1, characterized in that: The sealing cover is a plastic film, which is damaged when the polyurethane layer expands.

7. The nuclear power plant battery support according to claim 1, characterized in that: Flame retardants are added to the polyurethane layer.

8. The nuclear power plant battery support according to claim 1, characterized in that: During use, the battery bracket is installed on both sides or one side of the battery, with the polyurethane layer facing the battery surface. Beforehand, the protective plate, side fixing plate, and front sealing plate are removed. The mounting plate or sealing plate is then fixed to the battery cabinet. The weight of the inertia plate is offset by gravity, preventing the weight of the inertia plate from directly acting on the glass capsule. During a large earthquake, the relative movement between the battery cabinet and the inertia plate due to the inertia of the plate causes the force of the inertia plate to act on the glass capsule. During horizontal or vertical earthquakes, the longitudinal weakening groove of the glass capsule breaks; during forward or backward earthquakes, the transverse weakening groove breaks, causing water to overflow. The overflowing water diffuses through the capillary diffuser plate to the diffusion protrusions. After passing through the second diffuser plate, the water further diffuses onto the polyurethane layer. The polyurethane layer reacts with the water to generate carbon dioxide, causing it to expand rapidly and form a foam structure that fills the gap between the battery bracket and the battery, locking the battery in place and forming a unified structure between the battery and the battery cabinet. This prevents collisions between the battery and the battery cabinet and avoids damage to the wires caused by pulling.

9. The nuclear power plant battery support according to claim 1, characterized in that: The battery bracket should not come into contact with the battery during installation.

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