A new indoor rectangular battery explosion-proof safety isolation structure

Abstract

A new type of indoor rectangular battery explosion-proof safety isolation structure is provided, which comprises a battery, a welded aluminum row, a ceramicized silica gel plate, a fixed support and a battery isolation plate. The battery is arranged in an array inside the module and the positive and negative electrodes are alternately arranged horizontally. The welded aluminum row is welded to the positive and negative electrodes of the battery at both ends. The ceramicized silica gel plate is arranged around the battery, and small pieces of ceramicized silica gel plate are doped inside, which can be sintered into a hard ceramic layer at high temperature. The fixed support is an aluminum-magnesium alloy flange structure, including an end face fixed support and a side face fixed support, which are detachably connected through a fixed support connecting piece with mounting holes. The top has a shell connecting piece, and the fixed support is placed on the adaptively matched ceramicized silica gel plate. The battery isolation plate is a mica plate matched with the size of the battery surface, which is arranged between the fixed support and the battery. The use of the structure can effectively improve the explosion-proof safety of indoor rectangular battery, and the structure is stable and reliable, easy to install and maintain.

Description

Technical Field

[0001] This article belongs to the technical field of battery safety, specifically involving a novel indoor rectangular battery cell explosion-proof safety isolation structure. Background Technology

[0002] With the booming development of the new energy industry, lithium iron phosphate cells have been increasingly widely used in indoor power consumption scenarios (such as home energy storage systems and small emergency power devices) due to their advantages such as high safety and long cycle life. However, there are still problems to be solved in terms of safety protection of lithium iron phosphate cells in actual application.

[0003] Currently, lithium iron phosphate battery packs typically use separators to achieve protection and insulation between cells. Existing technologies mostly use epoxy boards or bakelite as separators to achieve this function. However, epoxy boards and bakelite have several insurmountable drawbacks: From a processing perspective, epoxy boards and bakelite have poor machinability. Cutting and drilling operations are not only inefficient but also prone to producing burrs and debris, increasing the difficulty of subsequent processing. In terms of mechanical properties, epoxy boards and bakelite have poor strength and toughness, making them unable to withstand the vibrations and impacts that the battery pack may experience during use. After long-term use, they are prone to cracking and damage, affecting their isolation and insulation performance. More importantly, when a battery experiences a short circuit or a cell explodes, epoxy boards and bakelite cannot effectively protect the cell and battery pack, failing to prevent further damage and providing reliable safety assurance. This significantly limits their application in battery systems with high safety requirements.

[0004] Given the numerous shortcomings of existing separators used in indoor rectangular battery cell packs, it is necessary to design a novel explosion-proof safety isolation structure for indoor rectangular battery cells to solve the problems existing in the current technology and improve the safety performance of the battery pack. Utility Model Content

[0005] To address the aforementioned issues, this paper proposes a novel indoor rectangular battery cell explosion-proof safety isolation structure. This structure comprises a battery cell, welded aluminum busbars, a ceramicized silicone sealant plate, a fixing bracket, and a battery cell isolation plate. The battery cell is placed inside the module, the welded aluminum busbars are positioned above the battery cell, and the ceramicized silicone sealant plate is positioned around the battery cell. The ceramicized silicone sealant plate is connected to the battery cell via the fixing bracket, which includes end-face fixing brackets and side fixing brackets. The end-face fixing bracket has a housing connector at its top, and both sides of the end-face fixing bracket are connected to the side fixing bracket via fixing bracket connectors. The battery cell isolation plate... The plate is positioned between the fixed bracket and the battery cell. The battery cell separator is made of mica. Through the cooperation between the ceramicized silicone mud plate, the fixed bracket, and the battery cell separator, a multi-layer protection system can be formed around the battery cell. The ceramicized silicone mud plate has high temperature resistance and flame retardancy, while the mica battery cell separator has excellent insulation performance and mechanical strength. The fixed bracket provides stable support for the entire structure through the coordinated connection of the end face and the side, and can also play a certain role in buffering when the battery cell expands. This multi-component collaborative design improves the overall safety of the battery pack from multiple dimensions such as isolation, protection, and support, and effectively solves the shortcomings of traditional separators in terms of explosion-proof, insulation, and mechanical performance.

[0006] Several battery cells are arranged in an array inside the module, with the positive and negative electrodes of the cells alternating horizontally. This array arrangement not only shortens the current transmission path, reduces the circuit resistance, and improves the charging and discharging efficiency of the battery pack, but also ensures that the cells are subjected to uniform stress within the module, reducing local overheating caused by uneven arrangement. At the same time, the horizontally alternating positive and negative electrode design can effectively avoid the potential difference concentration problem that may occur in the traditional series structure, reduce the risk of electrochemical corrosion between cells, and extend the cycle life of the battery pack.

[0007] The two ends of the welded aluminum busbar are connected to the positive and negative terminals of the battery cell respectively through a welding process. By welding the aluminum busbar, a stable electrical connection between the battery cells can be achieved. Its high conductivity ensures efficient current transmission between the battery cells, reduces contact resistance at the connection points, and reduces energy loss. At the same time, the connection structure formed by the welding process has strong mechanical strength and can withstand the expansion and contraction stress caused by temperature changes during the charging and discharging process of the battery cells. This avoids the loosening problems that may occur with traditional bolt connections, further ensuring the electrical connection stability and structural reliability of the battery pack.

[0008] The ceramicized silica gel mud plate is rectangular in shape and contains small pieces of ceramicized silica gel. When the local temperature of the battery exceeds 500°C, the ceramicized silica gel mud plate rapidly sinterstalizes into a hard ceramic layer. This ceramicized silica gel mud plate forms a physical barrier to isolate the high-temperature area from the surrounding battery cells, preventing the spread of thermal runaway. At the same time, the small pieces of ceramicized silica gel doped inside expand during the sintering process, filling any tiny gaps that may appear after sintering, further enhancing the barrier's sealing performance. This dual protection mechanism can not only withstand high-temperature impacts but also effectively block the penetration of flames and high-temperature gases, giving the battery module more time for emergency handling.

[0009] The mounting bracket is made of aluminum-magnesium alloy and features a folded edge structure. Ceramicized silicone mud plates of matching dimensions are placed on the end and side mounting brackets. The lightweight properties of aluminum-magnesium alloy reduce the overall weight of the battery module while ensuring structural strength. Its excellent heat dissipation performance can quickly conduct local heat to the external environment, preventing heat accumulation in the isolation area. The folded edge height of the mounting bracket is optimized to ensure that the ceramicized silicone mud plates can be placed while allowing reasonable space for the expansion of the battery cells, thus achieving an efficient balance between structural support and safety protection.

[0010] The fixed bracket connector is provided with mounting holes. The end face fixed bracket and the side fixed bracket are fixedly connected through the mounting holes by a detachable structure. The detachable structure enables quick assembly and disassembly, which facilitates flexible adjustment and subsequent maintenance and replacement during the battery module production process. This effectively reduces maintenance costs and time costs. This modular connection method not only ensures the stability of the overall structure of the fixed bracket, but also improves the adaptability and scalability of the battery module in different application scenarios.

[0011] The size of the cell separator is matched with the size of the cell surface. The cell separator is tightly attached to the cell surface. The mica material used has excellent insulation properties, which can effectively block the current conduction between cells and avoid the risk of short circuit.

[0012] Beneficial effects:

[0013] The ceramicized silicone mud plate, the fixing bracket, and the cell separator work together to form a multi-layered protection system around the cell. The ceramicized silicone mud plate has high temperature resistance and flame retardancy, while the mica cell separator has excellent insulation performance and mechanical strength. The fixing bracket provides stable support for the entire structure through the coordinated connection of the end face and the side, and can also play a certain role in buffering when the cell expands. This multi-component collaborative design improves the overall safety of the battery pack from multiple dimensions such as isolation, protection, and support, and effectively solves the shortcomings of traditional separators in terms of explosion-proof, insulation, and mechanical performance.

[0014] The cell array arrangement not only shortens the current transmission path, reduces loop resistance, and improves the charging and discharging efficiency of the battery pack, but also ensures that the cells are subjected to uniform stress within the module, reducing local overheating caused by uneven arrangement. At the same time, the horizontal alternating arrangement of the positive and negative electrodes of the cells can effectively avoid the potential difference concentration problem that may occur in the traditional series structure, reduce the risk of electrochemical corrosion between cells, and extend the cycle life of the battery pack.

[0015] By welding aluminum busbars, a stable electrical connection between battery cells can be achieved. Their high conductivity ensures efficient current transmission between cells, reduces contact resistance at the connection points, and minimizes energy loss. At the same time, the connection structure formed by the welding process has strong mechanical strength and can withstand the expansion and contraction stress caused by temperature changes during charging and discharging of the battery cells. This avoids the loosening problems that may occur with traditional bolt connections, further ensuring the electrical connection stability and structural reliability of the battery pack.

[0016] By forming a physical barrier with ceramicized silicone mud plates, the high-temperature area is isolated from the surrounding battery cells, preventing the spread of thermal runaway. At the same time, the small ceramicized silicone mud plates inside expand together during the sintering process, filling the tiny gaps that may be generated after sintering, further enhancing the sealing performance of the barrier. This dual protection mechanism can not only withstand high-temperature impacts, but also effectively block the penetration of flames and high-temperature gases, giving the battery module more time for emergency handling.

[0017] The lightweight properties of aluminum-magnesium alloy reduce the overall weight of the battery module while ensuring structural strength. Its excellent heat dissipation performance can quickly conduct local heat to the external environment, preventing heat from accumulating in the isolation area. The folded edge height of the fixing bracket has been optimized to ensure that the ceramicized silicone mud plate can be placed while leaving reasonable space for the expansion of the battery cell, thus achieving an efficient balance between structural support and safety protection.

[0018] The detachable structure of the end face fixing bracket and the side fixing bracket enables rapid assembly and disassembly, facilitating flexible adjustments during battery module production and subsequent maintenance and replacement. This effectively reduces maintenance and time costs. This modular connection method not only ensures the overall stability of the fixing bracket structure but also improves the adaptability and scalability of the battery module in different application scenarios.

[0019] The cell separator is tightly bonded to the cell surface, and the mica material used has excellent insulation properties, which can effectively block the current conduction between cells and avoid the risk of short circuit. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a novel indoor rectangular battery cell explosion-proof safety isolation structure.

[0021] Figure 2 This is a front view of a novel indoor rectangular battery cell explosion-proof safety isolation structure.

[0022] Figure 3 This is a side view of a novel indoor rectangular battery cell explosion-proof safety isolation structure.

[0023] Figure 4 This is a top view of a novel indoor rectangular battery cell explosion-proof safety isolation structure.

[0024] In the diagram: 1. Welded aluminum busbar, 2. Battery cell, 3. Side fixing bracket, 4. End fixing bracket, 5. Fixing bracket connector, 6. Ceramicized silicone mud plate, 7. Shell connector, 8. Battery cell isolation plate. Detailed Implementation

[0025] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0026] 1. Welded aluminum busbar, 2. Battery cell, 3. Side fixing bracket, 4. End fixing bracket, 5. Fixing bracket connector, 6. Ceramicized silicone mud plate, 7. Housing connector, 8. Battery cell isolation plate.

[0027] like Figure 1 , 2 As shown in Figures 3 and 4;

[0028] A novel indoor rectangular battery cell explosion-proof safety isolation structure is disclosed. The rectangular battery cell 2 explosion-proof safety isolation structure comprises a battery cell 2, a welded aluminum busbar 1, a ceramicized silicone sealant plate 6, a fixing bracket, and a battery cell isolation plate 8. The battery cell 2 is placed inside a module. The welded aluminum busbar 1 is positioned above the battery cell 2. The ceramicized silicone sealant plate 6 is positioned around the battery cell 2 and connected to the battery cell 2 via the fixing bracket. The fixing bracket includes an end-face fixing bracket 4 and a side fixing bracket 3. The top of the end-face fixing bracket 4 is provided with a housing connector 7, and both sides of the end-face fixing bracket 4 are connected to the side fixing brackets 3 via fixing bracket connectors 5. The battery cell isolation plate 8 is positioned between the fixing bracket and the battery cell 2 and is made of mica. The plurality of battery cells 2 are located within the module. The internal arrangement is in an array, and the positive and negative electrodes of the battery cell 2 are alternately arranged in the horizontal direction. The two ends of the welded aluminum busbar 1 are connected to the positive and negative electrodes of the battery cell 2 respectively by welding process. The ceramicized silica gel mud plate 6 is cuboid, and small pieces of ceramicized silica gel mud plate are doped inside the ceramicized silica gel mud plate 6. When the local temperature of the battery is higher than 500℃, the ceramicized silica gel mud plate 6 is rapidly sintered into a hard ceramic layer. The fixing bracket is made of aluminum-magnesium alloy and has a folded edge structure. The ceramicized silica gel mud plate 6 of the same size is placed on the end fixing bracket 4 and the side fixing bracket 3. The fixing bracket connector 5 is provided with mounting holes. The end fixing bracket 4 and the side fixing bracket 3 are fixedly connected through the mounting holes by a detachable structure. The size of the battery cell isolation plate 8 is adapted to the surface size of the battery cell 2.

[0029] Implementation example;

[0030] First, place each cell isolation plate 8 on the surface where the cell 2 contacts the fixed bracket, ensuring that the cell isolation plate 8 completely covers the contact area. Second, arrange the cells 2 sequentially inside the module, ensuring that the positive and negative electrodes of each cell 2 are alternately arranged horizontally. Place the welding aluminum busbars 1 on top of the cells 2 in sequence. Connect the two ends of each welding aluminum busbar 1 to the positive and negative electrodes of the two adjacent cells 2 respectively through laser welding. Then, install the side fixed bracket 3 and place it on the side of the cell 2. Next, install the end face fixed bracket 4. The two sides of the end face fixed bracket 4 are connected to the side fixed bracket 3 through fixed bracket connectors 5 to form a complete fixed bracket frame. Place ceramicized silicone mud plates 6 of matching size on the end face fixed bracket 4 and the side fixed bracket 3, ensuring that the ceramicized silicone mud plates 6 are tightly attached to the four sides of the fixed bracket to provide protection for subsequent explosion-proof and heat insulation. Finally, use the shell connector 7 on the top of the end face fixed bracket to connect and fix the entire structure to the outer shell through the connection structure, so that the structure remains stable during equipment operation.

[0031] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A novel indoor rectangular battery cell explosion-proof safety isolation structure, characterized in that, The rectangular battery cell explosion-proof safety isolation structure consists of a battery cell, welded aluminum busbars, ceramicized silicone mud plates, fixing brackets, and a battery cell isolation plate. The battery cell is placed inside the module, the welded aluminum busbars are located above the battery cell, and the ceramicized silicone mud plates are located around the battery cell. The ceramicized silicone mud plates are connected to the battery cell via fixing brackets. The fixing brackets include end-face fixing brackets and side fixing brackets. The top of the end-face fixing bracket is provided with a shell connector, and the two sides of the end-face fixing bracket are connected to the side fixing brackets via fixing bracket connectors. The battery cell isolation plate is located between the fixing brackets and the battery cell, and the battery cell isolation plate is made of mica.

2. The novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The aforementioned battery cells are arranged in an array inside the module, and the positive and negative terminals of the battery cells are alternately arranged in the horizontal direction.

3. The novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The two ends of the welded aluminum busbar are connected to the positive and negative terminals of the battery cell respectively through a welding process.

4. The novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The ceramicized silica gel mud plate is rectangular in shape, and small pieces of ceramicized silica gel mud plate are doped inside the ceramicized silica gel mud plate. When the local temperature of the battery exceeds 500°C, the ceramicized silica gel mud plate is rapidly sintered into a hard ceramic layer.

5. A novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The fixing bracket is made of aluminum-magnesium alloy and has a folded edge structure. Ceramicized silicone mud plates of matching size are placed on the end fixing bracket and the side fixing bracket.

6. The novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The fixed bracket connector is provided with mounting holes, and the end face fixed bracket and the side fixed bracket are fixedly connected through the mounting holes by a detachable structure.

7. The novel indoor rectangular battery cell explosion-proof safety isolation structure according to claim 1, characterized in that, The dimensions of the cell separator are adapted to the surface dimensions of the cell.

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