Multi-layer composite AGM (absorptive glass mat) separator

Abstract

The utility model provides a multilayer composite AGM separator, which comprises a base layer, an inner layer, a middle layer and an outer layer, the inner layer, the middle layer and the outer layer are sequentially arranged on two sides of the base layer from inside to outside, the base layer is made of carbon fiber composite materials, the inner layer is made of high melting point fiber materials, the middle layer is made of superfine glass fiber materials, and the outer layer is made of high molecular weight polyethylene; broken-line-shaped shallow grooves are formed in the two sides of the base layer at equal intervals, and broken-line-shaped bosses matched with the shallow grooves are arranged on the inner side of the inner layer. The AGM separator has the beneficial effects that through a composite structure of multiple layers of materials, high performance and multifunctionality of the separator are realized, and the safety and reliability of a battery are improved.

Description

Technical Field

[0001] The utility model relates to the field of battery separators, and more specifically, to a multi-layer composite AGM separator. Background Art

[0002] The AGM separator is a key component in sealed lead-acid batteries. It not only has the function of absorbing electrolytes but also is responsible for isolating the positive and negative electrodes of the battery to prevent short circuits. The performance of the AGM separator directly affects the starting performance, deep cycling ability, and service life of the battery. With the continuous development of battery technology, the performance requirements for AGM separators are also constantly increasing.

[0003] Traditional AGM separators are usually made of a single material. Although these materials meet certain performance requirements, they still have limitations in terms of mechanical strength, thermal stability, and electrochemical stability. For example, in a high-temperature environment, the dimensional stability and chemical stability of these materials may decrease, resulting in shrinkage, deformation, or degradation of the separator, thereby affecting the performance and safety of the battery. Summary of the Utility Model

[0004] Based on the above technical problems, the utility model proposes a multi-layer composite AGM separator.

[0005] A multi-layer composite AGM separator, the AGM separator includes: a base layer, an inner layer, a middle layer, and an outer layer. The inner layer, the middle layer, and the outer layer are sequentially arranged on both sides of the base layer from inside to outside. The base layer is made of a carbon fiber composite material, the inner layer is made of a high-melting-point fiber material, the middle layer is made of an ultra-fine glass fiber material, and the outer layer is made of high-molecular-weight polyethylene; on both sides of the base layer, there are zigzag shallow grooves with the same interval, and on the inner side of the inner layer, there are zigzag convex platforms matching the shallow grooves.

[0006] Preferably, in the AGM separator, an adhesive is applied between adjacent layers.

[0007] Preferably, the surfaces of the base layer, the inner layer, the middle layer, and the outer layer are subjected to surface activation treatment.

[0008] Advantageous Effects:

[0009] 1. Through the composite structure of multi-layer materials, the high performance and multi-functionality of the separator are realized, and the safety and reliability of the battery are improved;

[0010] 2. The base layer is made of a lightweight, high-strength, and high-rigidity carbon fiber composite material, which has good thermal stability and corrosion resistance;

[0011] 3. The inner layer of the high-melting-point fiber material ensures the stability of the separator in a high-temperature environment and extends the service life of the battery;

[0012] 4. The intermediate layer of the enhanced ultra-fine glass fiber provides excellent mechanical strength, preventing the separator from cracking during use;

[0013] 5. The outer layer of high molecular weight polyethylene ensures the electrochemical stability of the separator, reducing the risk of internal short circuit in the battery;

[0014] 6. The outer layer of high molecular weight polyethylene or polypropylene ensures the electrochemical stability of the separator, reducing the risk of internal short circuit in the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 shows the structural schematic of the present utility model Figure 1 ;

[0016] Figure 2 shows the structural schematic of the present utility model Figure 2 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0018] As Figures 1 to 2 shown, a multi-layer composite AGM separator, the innermost layer 2 of the AGM separator is the base layer 1, and the inner layer 2, the middle layer 3, and the outer layer 4 are sequentially arranged on both sides of the base layer 1 from inside to outside, and the surfaces of the base layer 1, the inner layer 2, the middle layer 3, and the outer layer 4 are subjected to surface activation treatment.

[0019] The base layer 1 is made of carbon fiber composite material. The base layer 1 made of carbon fiber composite material endows the separator with extremely high strength and rigidity, and can effectively prevent the separator from deforming or cracking due to external force or internal pressure during battery use.

[0020] The inner layer 2 is made of high melting point fiber material. The high melting point fiber material ensures that the separator can remain stable in a high temperature environment, which is particularly important for the battery to work under extreme temperature conditions, such as the high temperature generated when an electric vehicle is in a hot environment or during high-speed charging;

[0021] The middle layer 3 is made of ultra-fine glass fiber material. The ultra-fine glass fiber material further enhances the mechanical strength of the separator, ensuring the durability of the separator during long-term use and preventing cracking caused by mechanical fatigue;

[0022] The outer layer 4 is made of high molecular weight polyethylene. The high molecular weight polyethylene as the material of the outer layer 4 provides excellent electrochemical stability, reduces the risk of internal short circuit in the battery, and thus improves the safety performance of the battery.

[0023] On both sides of the base layer 1, there are zigzag shallow grooves 5 with the same interval. On the inner side of the inner layer 2, there are zigzag bosses 6 that match the shallow grooves 5. The matching design of the zigzag shallow grooves 5 on both sides of the base layer 1 and the bosses 6 of the inner layer 2 increases the contact area between layers, improves the bonding strength between layers. At the same time, this structural design also helps the flow and distribution of the electrolyte, improving the electrochemical reaction efficiency of the battery.

[0024] In the AGM separator, an adhesive is applied between adjacent layers. The outer layer 4 of high molecular weight polyethylene ensures the electrochemical stability of the separator and reduces the risk of internal short circuit of the battery.

[0025] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-layer composite AGM separator, characterized in that, The AGM separator includes: a base layer, an inner layer, a middle layer, and an outer layer. The inner layer, the middle layer, and the outer layer are sequentially arranged on both sides of the base layer from the inside to the outside. The base layer is made of a carbon fiber composite material, the inner layer is made of a high melting point fiber material, the middle layer is made of an ultra-fine glass fiber material, and the outer layer is made of high molecular weight polyethylene; both sides of the base layer are provided with zigzag shallow grooves at the same intervals, and the inner side of the inner layer is provided with zigzag convex platforms matching the shallow grooves.

2. The multi-layer composite AGM separator according to claim 1, wherein In the AGM separator, an adhesive is applied between adjacent layers.

3. The multi-layer composite AGM separator according to claim 1, characterized in that, The surfaces of the base layer, the inner layer, the middle layer, and the outer layer are subjected to surface activation treatment.

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