Novel diaphragm structure of storage battery

Abstract

The utility model discloses a novel diaphragm structure of a storage battery, which belongs to the technical field of storage battery diaphragms and comprises a fiber diaphragm, a non-woven fabric layer and a PE (polyethylene) diaphragm layer. The non-woven fabric layer and the PE diaphragm layer are adhered to the two sides of the glass fiber diaphragm. The diaphragm structure is composed of the fiber diaphragm, the non-woven fabric layer and the PE diaphragm layer, and due to the arrangement of the non-woven fabric layer and the PE diaphragm layer, the air permeability and the structural strength of the diaphragm structure are improved, the service life of the diaphragm structure is prolonged, and the using effect of the diaphragm structure is improved. The non-woven fabric layer is formed by coating glue and silicon dioxide powder on the surface of the non-woven fabric, silicon dioxide has high liquid absorption capacity, and the liquid absorption capacity of the whole diaphragm structure is improved. The PE diaphragm layer is formed by coating glue and carbon black powder on the surface of a PE diaphragm; and the carbon black has good conductivity, so that the conductivity of the whole diaphragm structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery separator technology, specifically a novel battery separator structure. Background Technology

[0002] The main components of a lead-acid battery currently include: battery casing, safety valve, battery inner cover, battery cover plate, sheet-like positive electrode plate, sheet-like negative electrode plate, separator, sulfuric acid electrolyte, and battery terminals. The separator is mainly composed of a membrane; the performance of the separator determines the battery's interface structure, internal resistance, etc., directly affecting the battery's capacity, cycle life, and safety performance. A high-performance separator plays a crucial role in improving the overall performance of the battery. The main function of the separator is to separate the positive and negative electrodes, preventing short circuits caused by contact between the electrodes. It also allows electrolyte ions to pass through. The separator material is non-conductive, and its physicochemical properties have a significant impact on battery performance.

[0003] Existing separators use only glass fiber, which is prone to breakage, difficult to bend, has poor mechanical strength, and poor air permeability, resulting in poor separator performance. To solve the above problems, this utility model provides a novel separator structure for storage batteries. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide a novel battery separator structure. The separator structure consists of three layers: a fiber separator, a non-woven fabric layer, and a PE separator layer. The inclusion of the non-woven fabric layer and the PE separator layer enhances the air permeability and structural strength of the separator structure, thus solving the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This utility model provides a novel battery separator structure, including: a fiber separator, a non-woven fabric layer, and a PE separator layer; the non-woven fabric layer and the PE separator layer are adhered to both sides of the fiber separator. Here, the separator structure is formed by adhering the non-woven fabric layer and the PE separator layer to both sides of the fiber separator. Compared with a fiberglass separator of the same thickness, this enhances air permeability. Furthermore, existing separators using only fiberglass are prone to breakage and are not easily bent; while the separator structure with the added non-woven fabric layer and PE separator layer increases structural strength and improves the service life of the separator.

[0006] Preferably, the nonwoven fabric layer is formed by coating the surface of the nonwoven fabric with adhesive and silica powder; the nonwoven fabric coated with adhesive and silica powder is pasted onto one side of the glass fiber separator; in fact, the separator needs to be able to absorb and retain a certain amount of electrolyte to ensure the normal chemical reaction of the battery during operation; silica has a strong liquid absorption capacity, which improves the liquid absorption capacity of the entire separator structure.

[0007] Preferably, the PE membrane layer is formed by coating the surface of the PE membrane with adhesive and carbon black powder; in fact, the PE membrane coated with adhesive and carbon black powder is pasted on the other side of the glass fiber membrane. Carbon black has good conductivity, thereby improving the conductivity of the entire membrane structure.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. The diaphragm structure of this utility model consists of three layers: a fiber diaphragm, a non-woven fabric layer, and a PE diaphragm layer. The addition of the non-woven fabric layer and the PE diaphragm layer improves the air permeability and structural strength of the diaphragm structure, thereby increasing its service life and performance.

[0010] 2. The nonwoven fabric layer of this utility model is formed by coating the surface of the nonwoven fabric with glue and silica powder. Silica has a strong liquid absorption capacity, which improves the liquid absorption capacity of the entire diaphragm structure.

[0011] 3. The PE diaphragm layer of this utility model is formed by coating the surface of the PE diaphragm with adhesive and carbon black powder; carbon black has good electrical conductivity, thereby improving the conductivity of the entire diaphragm structure. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a novel diaphragm structure for a storage battery provided by this utility model.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1-Fiber diaphragm, 2-Non-woven fabric layer, 3-PE diaphragm layer. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1:

[0018] like Figure 1As shown, this embodiment provides a novel battery separator structure, including: a fiber separator 1, a non-woven fabric layer 2, and a PE separator layer 3; the non-woven fabric layer 2 and the PE separator layer 3 are adhered to both sides of the fiberglass separator 1. In fact, the separator needs to have a certain degree of permeability to allow necessary gas exchange between oxygen and hydrogen inside the battery. This is particularly important for valve-regulated sealed lead-acid batteries, as it involves the internal oxygen cycle. Here, the separator structure is formed by adhering the non-woven fabric layer 2 and the PE separator layer 3 to both sides of the fiberglass separator 1, which enhances permeability compared to a fiberglass separator of the same thickness. Furthermore, the separator needs sufficient mechanical strength to withstand the expansion and contraction of the battery during charging and discharging, as well as the physical pressure that may be encountered during handling and installation. Existing separators using only fiberglass are prone to breakage and are not easily bent; however, the separator structure with the addition of the non-woven fabric layer 2 and the PE separator layer 3 increases structural strength and improves the service life of the separator.

[0019] In this embodiment, the diaphragm structure consists of three layers: a fiber diaphragm 1, a non-woven fabric layer 2, and a PE diaphragm layer 3. The addition of the non-woven fabric layer 2 and the PE diaphragm layer 3 improves the air permeability and structural strength of the diaphragm structure, thereby increasing its service life and performance.

[0020] Example 2:

[0021] While retaining all the technical features in Specific Embodiment 1, the nonwoven fabric layer 2 is formed by coating the surface of the nonwoven fabric with adhesive and silica powder, and the nonwoven fabric coated with adhesive and silica powder is pasted on one side of the glass fiber diaphragm 1; in fact, the diaphragm needs to be able to absorb and retain a certain amount of electrolyte to ensure the normal chemical reaction of the battery during operation; silica has a strong liquid absorption capacity, which improves the liquid absorption capacity of the entire diaphragm structure.

[0022] Example 3:

[0023] While retaining all the technical features in specific embodiments one and two, the PE membrane layer 3 is formed by coating the surface of the PE membrane with glue and carbon black powder; in fact, the PE membrane coated with glue and carbon black powder is pasted on the other side of the glass fiber membrane 1. Carbon black has good conductivity, thereby improving the conductivity of the entire membrane structure.

[0024] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A novel separator structure for a storage battery, characterized by comprising a porous separator having a plurality of pores and a plurality of projections on the surface thereof. Comprise: A fibrous diaphragm (1), a non-woven fabric layer (2) and a PE diaphragm layer (3); the glass fiber diaphragm (1) is adhered with the non-woven fabric layer (2) and the PE diaphragm layer (3) on both sides.

2. A novel separator structure for a battery as claimed in claim 1, wherein, The non-woven fabric layer (2) is formed by coating glue and silica powder on the surface of the non-woven fabric.

3. A novel separator structure for a battery as claimed in claim 2, wherein, The PE diaphragm layer (3) is formed by coating glue and carbon black powder on the surface of the PE diaphragm.

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