PE partition plate capable of increasing capacity of storage battery and preparation process of PE partition plate

Abstract

The invention relates to the technical field of PE partition plates, in particular to a PE partition plate capable of increasing the capacity of a storage battery and a preparation process thereof.The PE partition plate comprises a partition plate body, a composite layer and a reinforcing layer, the partition plate body is provided with ribs, and the reinforcing layer comprises a fiber reinforcing layer and a PE foam film; a plurality of ribs are arranged on the front side and the rear side of the partition plate body, the ribs and the partition plate body are integrally formed, the ribs penetrate through the composite layer and the reinforcing layer, and the ribs can enhance the strength and the heat-conducting property of the partition plate, provide certain elasticity and prevent active substances of a polar plate from falling off; the composite layer is used for improving the overall performance of the partition plate, the fiber reinforcement layer adopts a glass fiber mat, the PE partition plate disclosed by the invention has the advantages that through a multi-layer composite structure and a special structural design, the mechanical strength, corrosion resistance and heat dissipation performance of the partition plate are improved, and the capacity and performance of a storage battery are favorably improved.

Description

Technical Field

[0001] The invention relates to the technical field of PE separators, and in particular to a PE separator for increasing battery capacity and a preparation process thereof. Background Art

[0002] A chemical battery, or battery for short, is a device that can convert chemical energy into electrical energy. Among them, batteries that can be charged and discharged again are called storage batteries or secondary batteries, such as common lead-acid batteries and mobile phone batteries. This type of battery stores and releases electrical energy through reversible chemical reactions.

[0003] In a battery, the separator is a crucial component, located between the positive and negative plates. The performance of the separator directly affects the discharge capacity and charge-discharge cycle life of the battery. The main functions of the separator include: preventing the positive and negative electrodes from contacting each other and causing internal short circuits; maintaining a certain strength to prevent the plates from deforming, bending, and the active material from falling off; and storing the necessary electrolyte to ensure the high conductivity and reaction requirements of the battery.

[0004] However, the existing PE separator has a certain degree of corrosiveness because the electrolyte is composed of substances such as organic salts. Under long-term battery charging and discharging conditions, the performance of the PE separator will deteriorate, thereby affecting the capacitance of the battery. Summary of the invention

[0005] The purpose of the present invention is to provide a PE separator for increasing the capacity of a battery and a preparation process thereof, so as to solve the problem that the performance of the existing PE separator will deteriorate under the long-term charging and discharging conditions of the battery due to the electrolyte being composed of substances such as organic salts and having certain corrosiveness, thereby affecting the capacitance capacity of the battery.

[0006] To achieve the above-mentioned purpose, the present invention provides a PE separator for increasing the capacity of a battery and a preparation process thereof, comprising a separator body, a composite layer and a reinforcement layer, wherein the composite layer is arranged on the separator body and is located on one side of the separator body, the reinforcement layer is arranged on the composite layer and is located on a side of the composite layer away from the separator body, the separator body has ribs, the ribs are arranged on a side of the separator body close to the composite layer and the reinforcement layer, and the ribs penetrate the composite layer and the reinforcement layer; the reinforcement layer comprises a fiber reinforced layer and a PE foam film, the fiber reinforced layer is connected to the composite layer and is located on a side of the composite layer away from the separator body, and the PE foam film is connected to the fiber reinforced layer and is located on a side of the fiber reinforced layer away from the composite layer.

[0007] Among them, the composite layer includes an antioxidant protective film, a PE substrate and a flame retardant film, the antioxidant protective film is connected to the partition body and is located on one side of the partition body; the PE substrate is connected to the antioxidant protective film and is located on the side of the antioxidant protective film away from the partition body; the flame retardant film is connected to the PE substrate and is located on the side of the PE substrate away from the antioxidant protective film.

[0008] Among them, the composite layer also includes a honeycomb heat dissipation film and a thermally conductive silicone sheet, the honeycomb heat dissipation film is connected to the flame retardant film and is located on the side of the flame retardant film away from the PE substrate; the thermally conductive silicone sheet is connected to the honeycomb heat dissipation film and to the fiber reinforced layer, and is located between the honeycomb heat dissipation film and the fiber reinforced layer.

[0009] Among them, the PE substrate includes an ultraviolet absorbing film, an electric wave absorbing film and an anti-aging protective film, the ultraviolet absorbing film is connected to the anti-oxidation protective film, and is located on the side of the anti-oxidation protective film away from the partition body; the electric wave absorbing film is connected to the ultraviolet absorbing film, and is located on the side of the ultraviolet absorbing film away from the anti-oxidation protective film; the anti-aging protective film is respectively connected to the electric wave absorbing film and the flame retardant film, and is located between the electric wave absorbing film and the flame retardant film.

[0010] Wherein, the PE separator for increasing the battery capacity also includes a reinforcement layer, which is connected to the separator body and is located on one side of the separator body.

[0011] Wherein, the partition body further has a vertical side rib, which is fixedly connected to the partition body and is located on a side of the partition body close to the reinforcement layer and passes through the reinforcement layer.

[0012] The present invention also includes a process for preparing a PE separator for increasing the capacity of a battery, comprising the following steps:

[0013] Preparing raw materials for the partition body, the composite layer and the reinforcement layer;

[0014] Cleaning and drying the surface of the partition body, and then designing and processing the ribs and the vertical side ribs on the surface of the partition body;

[0015] Firstly, the anti-oxidation protective film is attached to one side of the substrate body, and then the PE substrate, the flame retardant film, the honeycomb heat dissipation film and the thermal conductive silicone sheet are attached in sequence;

[0016] The fiber reinforcement layer is attached to the outer side of the thermally conductive silicone sheet, and the PE foam film is attached to the outer side of the fiber reinforcement layer;

[0017] Laying the reinforcement layer on both sides of the partition body;

[0018] The assembled PE separators are comprehensively inspected, including appearance quality, bonding strength between layers, and integrity of ribs and vertical edge ribs.

[0019] The present invention discloses a PE separator for increasing the capacity of a battery and a preparation process thereof. The separator body is made of ultra-high molecular weight polyethylene as a raw material. The separator body constitutes the basis of the entire separator, is located in the innermost layer, and provides the main mechanical strength and vibration resistance. A plurality of ribs are provided on both the front and rear sides of the separator body. The ribs are integrally formed with the separator body and penetrate the composite layer and the reinforcement layer, but do not affect the functionality of each layer of the film. The ribs can enhance the strength and thermal conductivity of the separator, and provide a certain elasticity to prevent the active material of the plate from falling off. The composite layer is used to improve the overall performance of the separator. The fiber reinforcement layer adopts a glass fiber felt. The fiber reinforcement layer can effectively resist the internal pressure changes generated by the battery during the charging and discharging process to prevent the overall deformation or rupture of the separator. At the same time, the interwoven structure of the fibers also provides additional electrolyte channels to promote the rapid migration of ions. The PE foam film ensures the toughness and buffering effect of the separator. The PE separator of the present invention improves the mechanical strength, corrosion resistance and heat dissipation of the separator through a multi-layer composite structure and a special structural design, which helps to improve the capacity and performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0021] Figure 1 It is a schematic diagram of the overall structure of a PE separator for increasing battery capacity according to the first embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation structure of the partition body of the first embodiment of the present invention.

[0023] Figure 3 The first embodiment of the present invention Figure 2 Enlarged view of point A.

[0024] Figure 4 Schematic diagram of the structure of the reinforcement layer of the second embodiment of the present invention.

[0025] Figure 5 It is a flow chart of a process for preparing a PE separator for increasing battery capacity according to a third embodiment of the present invention.

[0026] In the figure: 101-partition body, 102-composite layer, 103-reinforcement layer, 104-ribs, 105-fiber reinforcement layer, 106-PE foam film, 107-anti-oxidation protective film, 108-PE substrate, 109-flame retardant film, 110-honeycomb heat dissipation film, 111-thermal conductive silicone sheet, 112-ultraviolet absorption film, 113-radio wave absorption film, 114-anti-aging protective film, 201-reinforcement layer, 202-vertical side ribs, 203-ion conduction reinforcement layer, 204-mechanical reinforcement layer, 205-chemical stabilization layer. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0028] First embodiment:

[0029] See also Figures 1 to 3 ,in Figure 1 This is a schematic diagram of the overall structure of the PE separator that increases the battery capacity. Figure 2 This is a schematic diagram of the installation structure of the partition body. Figure 3 yes Figure 2 Enlarged view of point A.

[0030] The present invention provides a PE separator for increasing the capacity of a battery and a preparation process thereof, comprising a separator body 101, a composite layer 102 and a reinforcement layer 103, wherein the separator body 101 has ribs 104, the reinforcement layer 103 comprises a fiber reinforcement layer 105 and a PE foam film 106, the composite layer 102 comprises an anti-oxidation protective film 107, a PE substrate 108, a flame retardant film 109, a honeycomb heat dissipation film 110 and a thermal conductive silicone sheet 111, and the PE substrate 108 comprises an ultraviolet absorption film 112, an electric wave absorption film 113 and an anti-aging protective film 114. Through a multi-layer composite structure and a special structural design, the mechanical strength, corrosion resistance and heat dissipation performance of the separator are improved, which helps to improve the capacity and performance of the battery. It can be understood that the aforementioned scheme can be used to enhance the performance of the PE separator and improve the battery capacity, and can also be used to improve the heat dissipation performance of the PE separator.

[0031] According to this specific embodiment, the composite layer 102 is arranged on the partition body 101 and is located on one side of the partition body 101. The reinforcing layer 103 is arranged on the composite layer 102 and is located on a side of the composite layer 102 away from the partition body 101. The partition body 101 has ribs 104. The ribs 104 are arranged on a side of the partition body 101 close to the composite layer 102 and the reinforcing layer. The ribs 104 penetrate the composite layer 102 and the reinforcing layer. The reinforcing layer 103 includes a fiber reinforced layer 105 and a PE foam film 106. The fiber reinforced layer 105 is connected to the composite layer 102 and is located on the side of the composite layer 102 away from the partition body 101. The PE foam film 106 is connected to the fiber reinforced layer 105 and is located on the side of the fiber reinforced layer 105 away from the composite layer 102. The partition body 101 is made of ultra-high molecular weight polyethylene as a raw material. The partition body 101 constitutes the basis of the entire partition and is located in the innermost layer. The main mechanical strength and vibration resistance are provided. A plurality of ribs 104 are provided on the front and rear sides of the partition body 101. The ribs 104 are inclinedly arranged and are integrally formed with the partition body 101, and penetrate the composite layer 102 and the reinforcement layer 103, but do not affect the functionality of each layer of the film. The ribs 104 can enhance the strength and thermal conductivity of the partition, and provide a certain elasticity to prevent the active material of the plate from falling off; the composite layer 102 is used to improve the overall performance of the partition. The fiber reinforcement layer 105 adopts glass fiber felt. The fiber reinforcement layer 105 can effectively resist the internal pressure changes generated by the battery during the charging and discharging process to prevent the overall deformation or rupture of the partition. At the same time, the interwoven structure of the fibers also provides additional electrolyte channels to promote the rapid migration of ions. The PE foam film 106 ensures the toughness and buffering effect of the partition. The PE partition of the present invention improves the mechanical strength, corrosion resistance and heat dissipation of the partition through a multi-layer composite structure and a special structural design, which helps to improve the capacity and performance of the battery.

[0032] Among them, the antioxidant protective film 107 is connected to the partition body 101 and is located on one side of the partition body 101; the PE substrate 108 is connected to the antioxidant protective film 107 and is located on the side of the antioxidant protective film 107 away from the partition body 101; the flame retardant film 109 is connected to the PE substrate 108 and is located on the side of the PE substrate 108 away from the antioxidant protective film 107.

[0033] Secondly, the honeycomb heat dissipation film 110 is connected to the flame retardant film 109 and is located on the side of the flame retardant film 109 away from the PE substrate 108; the thermal conductive silicone sheet 111 is connected to the honeycomb heat dissipation film 110 and to the fiber reinforced layer 105, and is located between the honeycomb heat dissipation film 110 and the fiber reinforced layer 105.

[0034] The antioxidant protective film 107 is used to prevent the partition body 101 from being oxidized and extend its service life. The flame retardant film 109 is made of a polymer material containing a flame retardant, and its main function is to improve the fire retardant effect of the partition. In abnormal situations such as short circuit or overheating of the battery, the flame retardant film 109 can quickly decompose and produce a large amount of gas and water vapor to form a protective layer to prevent the spread of fire; the honeycomb heat dissipation film 110 is made of an aluminum honeycomb panel with good air permeability, and its structure is similar to a honeycomb, with a large number of hexagonal holes. The honeycomb heat dissipation film 110 can enhance the heat dissipation permeability and improve the heat dissipation efficiency of the partition. During the operation of the battery, the heat generated can be quickly dissipated through the holes of the honeycomb heat dissipation film 110 to reduce the temperature inside the battery; the thermal conductive silicone sheet 111 can effectively guide the heat generated by the partition and transfer it to the battery casing or other heat dissipation components, thereby further improving the performance of the partition.

[0035] At the same time, the ultraviolet absorbing film 112 is connected to the antioxidant protective film 107 and is located on the side of the antioxidant protective film 107 away from the partition body 101; the radio wave absorbing film 113 is connected to the ultraviolet absorbing film 112 and is located on the side of the ultraviolet absorbing film 112 away from the antioxidant protective film 107; the anti-aging protective film 114 is respectively connected to the radio wave absorbing film 113 and the flame retardant film 109 and is located between the radio wave absorbing film 113 and the flame retardant film 109; the ultraviolet absorbing film 112 is made of a polymer material containing ultraviolet absorbers, which can absorb and convert ultraviolet energy, thereby protecting the PE partition from ultraviolet damage; the radio wave absorbing film 113 is used to absorb and shield electromagnetic waves; the anti-aging protective film 114 improves the anti-aging performance of the PE partition by adding anti-aging agents (such as hindered amine light stabilizers) to prevent the material from aging due to long-term exposure to light, high temperature and other environments.

[0036] Second embodiment:

[0037] Based on the first embodiment, please refer to Figure 4 , Figure 4It is a schematic diagram of the structure of the reinforcement layer of the second embodiment. The PE separator for increasing the battery capacity in this embodiment also includes a reinforcement layer 201. The separator body 101 also has vertical side ribs 202. The reinforcement layer 201 includes an ion conduction reinforcement layer 203 and a mechanical reinforcement layer 204.

[0038] According to this specific embodiment, the reinforcement layer 201 is connected to the partition body 101 and is located on one side of the partition body 101 .

[0039] Among them, the ion conduction enhancement layer 203 is connected to the partition body 101 and is located on the side of the partition body 101 close to the vertical edge rib 202; the mechanical enhancement layer 204 is connected to the ion conduction enhancement layer 203 and is located on the side of the ion conduction enhancement layer 203 away from the partition body 101.

[0040] Secondly, the chemical stabilization layer 205 is connected to the mechanical enhancement layer 204 and is located on a side of the mechanical enhancement layer 204 away from the ion conduction enhancement layer 203 .

[0041] The ion conduction enhancement layer 203 is made of a material with high ion conductivity, which can improve the conduction efficiency of ions in the partition body 101 and reduce the resistance of ion transmission, thereby maintaining the high capacitance of the battery; the mechanical reinforcement layer 204 is made of a high-strength and high-toughness material, such as glass fiber mesh, carbon fiber cloth or aramid fiber paper, which can enhance the mechanical strength of the partition and prevent the partition from rupturing due to expansion or contraction during the battery charging and discharging process, thereby ensuring the long-term stability of the battery; the chemical stabilization layer 205 prevents the electrolyte from corroding the partition body 101, thereby extending the service life of the partition and ensuring that the ions in the electrolyte can smoothly pass through the partition body 101.

[0042] Secondly, the vertical side ribs 202 are fixedly connected to the partition body 101, and are located on one side of the partition body 101 close to the reinforcement layer 201, and penetrate the reinforcement layer 201; the vertical side ribs 202 are symmetrically and evenly distributed on the edges of both ends of the partition body 101, so as to enhance the strength and stability of the edges of the partition body 101.

[0043] Third embodiment:

[0044] See also Figure 5 , Figure 5 The present invention is a flow chart of a process for preparing a PE separator for increasing battery capacity.

[0045] The present invention also includes a process for preparing a PE separator for increasing the capacity of a battery, comprising the following steps:

[0046] S101: preparing raw materials for the separator body 101, the composite layer 102 and the reinforcement layer 103;

[0047] S102: Cleaning and drying the surface of the partition body 101, and then designing and processing the ribs 104 and the vertical side ribs 202 on the surface of the partition body 101;

[0048] S103: firstly, the anti-oxidation protective film 107 is attached to one side of the substrate body, and then the PE substrate 108, the flame retardant film 109, the honeycomb heat dissipation film 110 and the thermal conductive silicone sheet 111 are attached in sequence;

[0049] S104: Laminating the fiber reinforcement layer 105 on the outer side of the thermally conductive silicone sheet 111 , and laminating the PE foam film 106 on the outer side of the fiber reinforcement layer 105 ;

[0050] S105: attaching the reinforcement layer 201 to both sides of the partition body 101;

[0051] S106: Perform a comprehensive inspection on the assembled PE separator, including the appearance quality, the bonding strength between the layers, and the integrity of the ribs 104 and the vertical side ribs 202.

[0052] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A PE separator for increasing battery capacity, characterized in that: The partition body comprises a partition body, a composite layer and a reinforcement layer, wherein the composite layer is arranged on the partition body and located on one side of the partition body, the reinforcement layer is arranged on the composite layer and located on a side of the composite layer away from the partition body, the partition body has ribs, the ribs are arranged on a side of the partition body close to the composite layer and the reinforcement layer, and the ribs penetrate the composite layer and the reinforcement layer; The reinforcement layer includes a fiber reinforcement layer and a PE foam film, the fiber reinforcement layer is connected to the composite layer and is located on a side of the composite layer away from the partition body, and the PE foam film is connected to the fiber reinforcement layer and is located on a side of the fiber reinforcement layer away from the composite layer.

2. The PE separator for increasing battery capacity according to claim 1, characterized in that: The composite layer includes an antioxidant protective film, a PE substrate and a flame retardant film, the antioxidant protective film is connected to the partition body and is located on one side of the partition body; the PE substrate is connected to the antioxidant protective film and is located on a side of the antioxidant protective film away from the partition body; the flame retardant film is connected to the PE substrate and is located on a side of the PE substrate away from the antioxidant protective film.

3. The PE separator for increasing battery capacity according to claim 2, characterized in that: The composite layer also includes a honeycomb heat dissipation film and a thermally conductive silicone sheet. The honeycomb heat dissipation film is connected to the flame retardant film and is located on a side of the flame retardant film away from the PE substrate; the thermally conductive silicone sheet is connected to the honeycomb heat dissipation film and to the fiber reinforced layer, and is located between the honeycomb heat dissipation film and the fiber reinforced layer.

4. The PE separator for increasing battery capacity as claimed in claim 3, characterized in that: The PE substrate includes an ultraviolet absorbing film, an electric wave absorbing film and an anti-aging protective film. The ultraviolet absorbing film is connected to the anti-oxidation protective film and is located on the side of the anti-oxidation protective film away from the partition body; the electric wave absorbing film is connected to the ultraviolet absorbing film and is located on the side of the ultraviolet absorbing film away from the anti-oxidation protective film; the anti-aging protective film is respectively connected to the electric wave absorbing film and the flame retardant film, and is located between the electric wave absorbing film and the flame retardant film.

5. The PE separator for increasing battery capacity according to claim 1, characterized in that: The PE separator for increasing the battery capacity also includes a reinforcement layer, which is connected to the separator body and is located on one side of the separator body.

6. The PE separator for increasing battery capacity as claimed in claim 5, characterized in that: The partition body also has a vertical side rib, which is fixedly connected to the partition body and is located on a side of the partition body close to the reinforcement layer and passes through the reinforcement layer.

7. A process for preparing a PE separator for increasing battery capacity, used for preparing a PE separator for increasing battery capacity as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Preparing raw materials for the partition body, the composite layer and the reinforcement layer; Cleaning and drying the surface of the partition body, and then designing and processing the ribs and the vertical side ribs on the surface of the partition body; Firstly, the anti-oxidation protective film is attached to one side of the substrate body, and then the PE substrate, the flame retardant film, the honeycomb heat dissipation film and the thermal conductive silicone sheet are attached in sequence; The fiber reinforcement layer is attached to the outer side of the thermally conductive silicone sheet, and the PE foam film is attached to the outer side of the fiber reinforcement layer; Laying the reinforcement layer on both sides of the partition body; The assembled PE separators are comprehensively inspected, including appearance quality, bonding strength between layers, and integrity of ribs and vertical edge ribs.

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