Novel composite structure AGM separator

Abstract

The utility model discloses a novel composite structure AGM separator, which comprises two first glass fiber boards, two reinforcing boards and two second glass fiber boards, the two first glass fiber boards are respectively and oppositely arranged on the outermost layer, namely the first layer and the sixth layer, the two reinforcing boards are respectively and oppositely arranged on the second layer and the fifth layer, and the two reinforcing boards are respectively and oppositely arranged on the outermost layer, namely the first layer and the sixth layer. The two second glass fiber plates are oppositely arranged on the third layer and the fourth layer respectively, the two reinforcing plates are arranged between the first glass fiber plate and the second glass fiber plates respectively, and limiting structures are arranged among the first glass fiber plate, the second glass fiber plates and the reinforcing plates. According to the composite structure, the two glass fiber plates with different beating degrees are adopted, and the reinforcing plates and the fixing assemblies are adopted for fixed connection, so that the connection stability is ensured, and meanwhile, the composite structure has relatively high strength, rebound resilience and relatively high liquid absorption performance and discharge efficiency.

Description

Technical Field

[0001] This utility model relates to the field of AGM partition technology, and in particular to a novel composite structure AGM partition. Background Technology

[0002] With the continuous development of battery technology, especially in the fields of starting batteries and energy storage batteries, the requirements for battery performance are becoming increasingly stringent. AGM separators, as an advanced battery separator material, play an increasingly important role in battery technology due to their unique structure and performance. Made of ultrafine glass fibers, AGM separators possess high porosity and excellent liquid absorption properties, effectively absorbing and retaining electrolyte to ensure the smooth progress of electrochemical reactions within the battery. Furthermore, AGM separators also exhibit good mechanical strength and corrosion resistance, maintaining stable performance even in harsh battery operating environments. Therefore, AGM separators play a crucial role in improving battery energy density, extending battery life, and enhancing battery safety.

[0003] Despite the significant advantages of AGM separators in battery technology, their research and development and production still face numerous technical challenges. These include improving the porosity and liquid absorption rate of AGM separators to meet the demands of high-performance batteries; optimizing the mechanical properties of AGM separators to ensure their stability under complex operating environments; and reducing the production cost of AGM separators to enhance their market competitiveness. To address these challenges, current research and development trends in AGM separator technology focus primarily on material innovation, process optimization, and performance improvement. By introducing new materials, improving production processes, and strengthening performance testing, continuous progress and development of AGM separator technology are being driven to meet market demand for high-performance, low-cost battery separators.

[0004] Patent document CN209104246U discloses an AGM separator, including an AGM separator body. The AGM separator body has several horizontally aligned holes. Each side surface of the AGM separator body also has an elastic layer, and each elastic layer surface includes several elastic protrusions. This invention improves the resilience and compressibility of the AGM separator, thereby enhancing the adhesion between the AGM separator and the electrode plate.

[0005] The aforementioned AGM separator is a single-structure separator, with both the porosity of the separator material and the beating rate of the glass fiber layer being single parameters. This design has gradually revealed some drawbacks in practical applications. Due to the singularity of porosity and beating rate, single-structure AGM separators often struggle to simultaneously meet the battery's performance requirements for high electrolyte absorption, high wet voltage retention, high strength, and low resistivity. For example, while high porosity is beneficial for electrolyte absorption, it may reduce the mechanical strength of the separator; and while high beating rate glass fibers can improve electrolyte absorption, they may also lead to a loose separator structure, affecting the battery's internal resistance and cycle life. Therefore, to overcome these drawbacks of single-structure AGM separators, the focus of improvement has gradually shifted to the development of composite separators. By combining glass fiber layers with different porosities and beating rates, and adding polymer materials with specific functions, multi-layered composite AGM separators can be designed, thereby achieving comprehensive optimization of battery performance. However, the introduction of the composite AGM separator concept has brought about a new problem: the stability of AGM separators with various parameters during composite assembly. Ensuring that these separator layers with different porosities, percussion rates, and material properties are tightly bonded during the composite process, and avoiding the detachment of multiple separators during use, has become a pressing technical challenge. Summary of the Invention

[0006] The purpose of this invention is to provide a novel composite structure AGM partition to address the aforementioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a novel composite structure AGM partition, comprising two first fiberglass boards, two reinforcing plates, and two second fiberglass boards. The two first fiberglass boards are respectively disposed opposite to each other in the outermost layer, namely the first layer and the sixth layer. The two reinforcing plates are respectively disposed opposite to each other in the second layer and the fifth layer. The two second fiberglass boards are respectively disposed opposite to each other in the third layer and the fourth layer. The two reinforcing plates are respectively disposed between the first fiberglass boards and the second fiberglass boards. A limiting structure is provided between the first fiberglass boards, the second fiberglass boards, and the reinforcing plates. Fixing components are provided on the outside of the two first fiberglass boards, the two reinforcing plates, and the two second fiberglass boards.

[0008] As a further description of the above technical solution: the limiting structure includes multiple protrusions and multiple grooves formed at the top and bottom of the reinforcing plate. The multiple protrusions are respectively disposed on the surface of the first glass fiber plate and the second glass fiber plate near the reinforcing plate, and the multiple protrusions and multiple grooves are mutually adapted.

[0009] As a further description of the above technical solution: the fixing component includes two fixing brackets and multiple bolts. The side walls of the two first fiberglass boards are provided with slots. The two ends of the two fixing brackets are slidably connected to four grooves respectively. The top and bottom ends of the fixing brackets are provided with first screw holes. The first fiberglass boards are provided with second screw holes. The bolts are threadedly connected to the two first fiberglass boards through the first screw holes and the second screw holes.

[0010] As a further description of the above technical solution: the two first fiberglass boards, the two reinforcing plates and the two second fiberglass boards are all provided with recessed portions on both end sidewalls, and the depth of the recessed portion is the same as the thickness of the fixing frame.

[0011] As a further description of the above technical solution: a polyurethane adhesive is provided between the groove and the protrusion.

[0012] As a further description of the above technical solution: both the fixing frame and the bolts are coated with epoxy resin.

[0013] As a further description of the above technical solution: a polyvinyl alcohol layer is provided on the outside of the reinforcing plate.

[0014] As a further description of the above technical solution: a sodium carboxymethyl cellulose layer is provided on the outside of the second glass fiber board.

[0015] As a further description of the above technical solution: the height of the fixing frame 1 is set to 2 mm.

[0016] This invention provides a novel composite structure AGM separator. It offers the following advantages: the first glass fiber board uses a breaking rate of 34, and the second glass fiber board uses a breaking rate of 39. The 34 breaking rate glass fiber has a high breaking rate and finer fibers, enabling the formation of more fine pores. This high porosity maximizes the separator's liquid absorption performance, ensuring that the electrolyte can fully penetrate the separator, improving the battery's energy density and discharge efficiency, and reducing internal resistance. The 39 breaking rate glass fiber has a moderate breaking rate, maintaining a certain level of liquid absorption while increasing the separator's strength and resilience. This composite structure uses two glass fiber boards with different breaking rates and is fixedly connected using reinforcing plates and fixing components, ensuring connection stability and simultaneously possessing high strength, resilience, high liquid absorption performance, and high discharge efficiency.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0018] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a novel composite AGM partition proposed in this utility model;

[0020] Figure 2 This utility model Figure 1 A magnified structural diagram at point A;

[0021] Figure 3 This is a three-dimensional exploded structural diagram of the present invention;

[0022] Figure 4 This is a three-dimensional exploded view of the structure of this utility model after the fixing components have been removed;

[0023] Figure 5 This is a three-dimensional structural diagram of the reinforcing plate of this utility model;

[0024] Figure 6 This is a cross-sectional structural diagram of the fixing frame of this utility model;

[0025] Figure 7 This is a cross-sectional view of the second glass fiber cotton board of this utility model.

[0026] Legend:

[0027] 1. Fixing frame; 2. First screw hole; 3. Second screw hole; 4. Bolt; 5. Slot; 6. First fiberglass board; 7. Reinforcing plate; 8. Second fiberglass board; 9. Protrusion; 10. Groove; 11. Polyurethane adhesive; 12. Recess; 13. Polyvinyl alcohol layer; 15. Epoxy resin coating; 16. Sodium carboxymethyl cellulose layer. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figure 1-7A novel composite structure AGM partition includes two first fiberglass boards 6, two reinforcing plates 7, and two second fiberglass boards 8. The two first fiberglass boards 6 are respectively arranged opposite each other in the outermost layer, i.e., the first layer and the sixth layer. The two reinforcing plates 7 are respectively arranged opposite each other in the second layer and the fifth layer. The two second fiberglass boards 8 are respectively arranged opposite each other in the third layer and the fourth layer. The two reinforcing plates 7 are respectively disposed between the first fiberglass boards 6 and the second fiberglass boards 8, and a limiting structure is provided between the first fiberglass boards 6, the second fiberglass boards 8, and the reinforcing plates 7. Fixing components are provided on the outside of the two first fiberglass boards 6, the two reinforcing plates 7, and the two second fiberglass boards 8. The first fiberglass boards 6 are made of... The first glass fiber board has a breakage rate of 34, while the second glass fiber board 8 uses a breakage rate of 39. The 34 glass fiber has a high breakage rate and finer fibers, which can form more tiny pores. The high porosity setting can maximize the liquid absorption performance of the separator, ensuring that the electrolyte can fully penetrate into the separator, improving the energy density and discharge efficiency of the battery, and reducing the internal resistance of the battery. The 39 glass fiber has a moderate breakage rate, which is to increase the strength and resilience of the separator while maintaining a certain liquid absorption performance. This composite structure uses two glass fiber boards with different breakage rates and is fixedly connected by a reinforcing plate 7 and a fixing component to ensure the stability of the connection, and at the same time has high strength, resilience, and high liquid absorption performance and discharge efficiency.

[0030] As a preferred technical solution of this embodiment, the limiting structure includes a plurality of protrusions 9 and a plurality of grooves 10 formed at the top and bottom of the reinforcing plate 7. The plurality of protrusions 9 are respectively disposed on the surfaces of the first fiberglass board 6 and the second fiberglass board 8 near the reinforcing plate 7, and the plurality of protrusions 9 and the plurality of grooves 10 are mutually adapted to each other. The plurality of protrusions 9 of the first fiberglass board 6 and the second fiberglass board 8 are inserted into the grooves 10 at the top and bottom of the reinforcing plate 7, which can realize the limiting and fixing between the reinforcing plate 7, the first fiberglass board 6 and the second fiberglass board 8, and prevent the first fiberglass board 6 and the second fiberglass board 8 from sliding relative to the intermediate reinforcing plate 7.

[0031] As a preferred technical solution of this embodiment, the fixing component includes two fixing brackets 1 and multiple bolts 4. The side walls of the two first fiberglass boards 6 are provided with slots 5. The two ends of the two fixing brackets 1 are slidably connected to four grooves 10 respectively. The top and bottom ends of the fixing brackets 1 are provided with first screw holes 2. The first fiberglass boards 6 are provided with second screw holes 3. The bolts 4 are threadedly connected to the two first fiberglass boards 6 through the first screw holes 2 and the second screw holes 3. The fixing brackets 1 can fix and limit the multiple boards to prevent them from falling apart during use.

[0032] As a preferred technical solution in this embodiment, the two end sidewalls of the two first fiberglass boards 6, the two reinforcing plates 7 and the two second fiberglass boards 8 are provided with recesses 12, the depth of the recesses 12 is the same as the thickness of the fixing frame 1; the fixing frame 1 is tightly attached to the two sides of the two first fiberglass boards 6, the two reinforcing plates 7 and the two second fiberglass boards 8 through the recesses 12, thereby increasing the stability of the structure.

[0033] As a preferred technical solution in this embodiment, a polyurethane adhesive 11 is provided between the groove 10 and the protrusion 9; the first glass fiber board 6 and the second glass fiber board 8 can be connected and fixed by the polyurethane adhesive 11. The chemical properties of the polyurethane adhesive 11 are relatively stable and will not react with the electrolyte.

[0034] As a preferred technical solution in this embodiment, both the fixing frame 1 and the bolt 4 are provided with an epoxy resin coating 15 on their exterior. Since the fixing frame 1 and the bolt 4 are components outside the AGM partition, the epoxy resin coating 15 can effectively improve their corrosion resistance and durability. As a high-performance protective material, the epoxy resin coating 15 has excellent sealing properties and chemical stability, and can isolate external moisture, oxygen and corrosive media from direct contact with the metal substrate, thereby greatly extending the service life of the fixing frame 1 and the bolt 4.

[0035] As a preferred technical solution in this embodiment, the reinforcing plate 7 is provided with a polyvinyl alcohol layer 13 on its exterior; it has good water absorption and swelling properties, and can be used to improve the wet pressure holding capacity of the partition.

[0036] As a preferred technical solution in this embodiment, a sodium carboxymethyl cellulose layer 16 is provided on the outside of the second glass fiber board 8. The sodium carboxymethyl cellulose layer 16 can enhance the liquid absorption capacity. Since the second glass fiber board 8 is inside the composite board, its liquid absorption capacity is not as strong as that of the outer first glass fiber board 6. Therefore, the sodium carboxymethyl cellulose layer 16 can enhance the strength of the second glass fiber board 8 and reduce the stratification phenomenon of acid concentration.

[0037] As a preferred technical solution in this embodiment, the height of the fixing frame 1 is set to 2 mm; the thickness of the fixing frame 1 is relatively thin, so that the composite partition can be adapted to the usage environment in actual use.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel composite structure AGM partition, comprising two first glass fiber plates (6), two reinforcing plates (7), and two second glass fiber plates (8), characterized in that, Two first fiberglass boards (6) are respectively disposed opposite to each other on the outermost layer, namely the first layer and the sixth layer. Two reinforcing plates (7) are respectively disposed opposite to each other on the second layer and the fifth layer. Two second fiberglass boards (8) are respectively disposed opposite to each other on the third layer and the fourth layer. The two reinforcing plates (7) are respectively disposed between the first fiberglass board (6) and the second fiberglass board (8). A limiting structure is provided between the first fiberglass board (6), the second fiberglass board (8) and the reinforcing plate (7). Fixing components are provided on the outside of the two first fiberglass boards (6), the two reinforcing plates (7) and the two second fiberglass boards (8).

2. The novel composite structure AGM partition according to claim 1, characterized in that, The limiting structure includes multiple protrusions (9) and multiple grooves (10) formed at the top and bottom of the reinforcing plate (7). The multiple protrusions (9) are respectively disposed on the surface of the first glass fiber plate (6) and the second glass fiber plate (8) on the side close to the reinforcing plate (7). The multiple protrusions (9) and the multiple grooves (10) are mutually adapted.

3. The novel composite structure AGM partition according to claim 1, characterized in that, The fixing assembly includes two fixing brackets (1) and multiple bolts (4). The side walls of the two first fiberglass boards (6) are provided with slots (5). The two ends of the two fixing brackets (1) are slidably connected to four grooves (10) respectively. The top and bottom ends of the fixing brackets (1) are provided with first screw holes (2). The first fiberglass boards (6) are provided with second screw holes (3). The bolts (4) are threaded to the two first fiberglass boards (6) by means of the first screw holes (2) and the second screw holes (3).

4. The novel composite structure AGM partition according to claim 1, characterized in that, The two first fiberglass boards (6), the two reinforcing plates (7) and the two second fiberglass boards (8) are provided with recesses (12) on both ends of the sidewalls. The depth of the recesses (12) is the same as the thickness of the fixing frame (1).

5. A novel composite structure AGM partition according to claim 2, characterized in that, A polyurethane adhesive (11) is provided between the groove (10) and the protrusion (9).

6. The novel composite structure AGM partition according to claim 3, characterized in that, The outer surfaces of the fixing frame (1) and the bolts (4) are both coated with epoxy resin (15).

7. The novel composite structure AGM partition according to claim 1, characterized in that, The reinforcing plate (7) is provided with a polyvinyl alcohol layer (13) on its exterior.

8. The novel composite structure AGM partition according to claim 1, characterized in that, The exterior of the second glass fiber board (8) is provided with a sodium carboxymethyl cellulose layer (16).

9. A novel composite structure AGM partition according to claim 3, characterized in that, The height of the fixing frame (1) is set to 2 mm.

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