High energy low cost lithium polymer battery

Abstract

The utility model discloses a lithium polymer battery with high energy and low cost, which belongs to the technical field of batteries and comprises a battery case and a sealing cover mounted on the battery case, a positive tab is inserted into one end of the sealing cover, a negative tab is inserted into the other end of the sealing cover, and the lower ends of the positive tab and the negative tab penetrate into the battery case. The liquid electrolyte filled in the battery shell is replaced by the polymer electrolyte, and the polymer electrolyte is in a solid state or a gel state during use and does not contain liquid components, so that the problem of leakage of the battery can be solved, the safety and reliability of the battery are improved, the service life of the battery is prolonged, and the service life of the battery is prolonged. Therefore, the conversion of energy in the battery can be better utilized, the high-energy and low-cost use state of the battery is embodied, and the shape of the battery used by the polymer electrolyte is flexible and changeable and can be in a film shape, a flexible shape or any shape, so that the adaptability of the battery is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to high-energy, low-cost lithium polymer batteries. Background Technology

[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes to generate an electric current. It is a cup, tank, or other container or a portion of a composite container. It has positive and negative electrodes. With technological advancements, the term "battery" now generally refers to any small device capable of generating electrical energy.

[0003] The most common type of battery currently is the lithium battery, which uses a liquid electrolyte, usually a mixture of organic solvents and lithium salts. It is typically cylindrical or square in shape and has a relatively compact structure. However, because lithium batteries use a liquid electrolyte, they are prone to leakage and combustion, resulting in relatively low safety and risks of thermal runaway and fire. This leads to a shorter lifespan for lithium batteries, which increases the cost of use. Furthermore, due to their lower safety, the energy utilization of lithium batteries is also shortened, reducing the time that the batteries can be used. In order to solve the problems mentioned above, high-energy, low-cost lithium polymer batteries have been proposed. Utility Model Content

[0004] The purpose of this invention is to provide a high-energy, low-cost lithium polymer battery. By adding a polymer electrolyte to the liquid electrolyte filling the battery casing, the polymer electrolyte is used in a solid or gel form and does not contain any liquid components. It can mix with the liquid electrolyte, thereby reducing battery leakage, improving battery safety and reliability, and extending battery life. As a result, the energy conversion inside the battery can be better utilized, reflecting the high-energy, low-cost usage of the battery. Furthermore, the shape of the battery using the polymer electrolyte is flexible and can be varied, such as thin film, flexible, or arbitrary shape, enhancing the battery's adaptability and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-energy, low-cost lithium polymer battery, comprising a battery casing and a sealing cover mounted on the battery casing, wherein a positive electrode tab is inserted into one end of the sealing cover and a negative electrode tab is inserted into the other end of the sealing cover, the lower ends of the positive and negative electrode tabs extend into the battery casing, the battery casing is filled with a polymer electrolyte, and a polymer separator is disposed at the center of the inner cavity of the battery casing.

[0006] Preferably, the polymer separator divides the inner cavity of the battery casing into a positive electrode region and a negative electrode region, with the positive electrode tab located in the positive electrode region and the negative electrode tab located in the negative electrode region.

[0007] Preferably, the surface of the polymer membrane has micropores arranged in a honeycomb pattern.

[0008] Preferably, the surface of the battery casing is covered with an aluminum-plastic composite film, and the surface of the aluminum-plastic composite film is wrapped with adhesive tape.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention provides a high-energy, low-cost lithium polymer battery. By adding a polymer electrolyte to the liquid electrolyte filling the battery casing, the polymer electrolyte is used in a solid or gel form and does not contain any liquid components. It can mix with the liquid electrolyte, thereby reducing the risk of battery leakage, improving battery safety and reliability, and extending battery life. As a result, the energy conversion inside the battery can be better utilized, demonstrating the high-energy, low-cost usage of the battery. Furthermore, the shape of the battery using the polymer electrolyte is flexible and can be varied, including thin film, flexible, or arbitrary shapes, enhancing the battery's adaptability.

[0011] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the battery casing structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the polymer diaphragm structure of this utility model.

[0015] The following are labeled in the diagram: 1. Battery casing; 2. Sealing cap; 3. Positive electrode tab; 4. Negative electrode tab; 5. Polymer electrolyte; 6. Polymer separator; 7. Positive electrode area; 8. Negative electrode area; 9. Micro-perforation; 10. Aluminum-plastic composite membrane; 11. Adhesive tape. 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] This utility model provides, for example Figures 1-3 The high-energy, low-cost lithium polymer battery shown includes a battery casing 1 and a sealing cover 2 mounted on the battery casing 1. A positive electrode tab 3 is inserted into one end of the sealing cover 2, and a negative electrode tab 4 is inserted into the other end of the sealing cover 2. The lower ends of the positive electrode tab 3 and the negative electrode tab 4 extend into the battery casing 1. The battery casing 1 is filled with a polymer electrolyte 5, and a polymer separator 6 is provided at the center of the inner cavity of the battery casing 1. By replacing the liquid electrolyte filled inside the battery casing 1 with the polymer electrolyte 5, which is solid or gel-like in use and does not contain any liquid components, the problem of battery leakage can be reduced, the safety and reliability of the battery can be improved, and the battery life can be extended. Therefore, the energy conversion inside the battery can be better utilized, reflecting the high-energy, low-cost use of the battery. Furthermore, the shape of the battery using the polymer electrolyte 5 is also flexible and can be thin film, flexible, or arbitrary, enhancing the adaptability of the battery.

[0018] The polymer separator 6 divides the inner cavity of the battery casing 1 into a positive electrode region 7 and a negative electrode region 8. The positive electrode tab 3 is located in the positive electrode region 7, and the negative electrode tab 4 is located in the negative electrode region 8. By setting the positive electrode region 7 and the negative electrode region 8, the positive electrode tab 3 and the negative electrode tab 4 can easily react with the polymer electrolyte 5 at the designated positions, thereby generating energy.

[0019] The polymer separator 6 has micro-perforations 9 on its surface, arranged in a honeycomb pattern. The main function of the polymer separator 6 is to isolate the positive and negative electrodes and prevent short circuits. The micro-perforations 9 on the polymer separator 6 can effectively separate the positive and negative electrodes of the battery, preventing them from directly contacting each other and forming a short circuit. This design not only ensures that there is no physical contact between the positive and negative electrodes during the charging and discharging process, but also avoids the risk of short circuits. Secondly, the micro-perforations 9 on the polymer separator 6 allow lithium ions to pass through, forming a charging and discharging circuit. The structure of the micro-perforations 9 on the polymer separator 6 allows lithium ions to pass through smoothly, thereby completing the charging and discharging process of the battery.

[0020] The surface of the battery casing 1 is covered with an aluminum-plastic composite film 10. The aluminum-plastic composite film 10 has puncture resistance and can effectively prevent short circuits or leakage caused by external force damage to the battery, ensuring the integrity and service life of the battery. The surface of the aluminum-plastic composite film 10 is wrapped with adhesive tape 11. During the battery encapsulation process, the wrapped adhesive tape 11 can prevent electrolyte leakage and protect the internal aluminum-plastic composite film 10 and other components from electrolyte corrosion.

[0021] In practical use, a certain proportion of solid or gel-like polymer electrolyte 5 is filled into the original liquid electrolyte, so that the liquid electrolyte and polymer electrolyte 5 are mixed, thereby reducing the problem of battery leakage, improving the safety and reliability of the battery, and extending the battery's lifespan. Therefore, the energy conversion inside the battery can be better utilized. Subsequently, the mixed liquid electrolyte and polymer electrolyte 5 are introduced into the positive electrode region 7, polymer separator 6, and negative electrode region 8. Under certain voltage, temperature, and time conditions, the polymer electrolyte 5 undergoes an electrochemical polymerization reaction, growing a polymer network that encapsulates the electrolyte within the polymer electrolyte 5. This demonstrates a polymer battery with lower cost and higher energy density.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-energy, low-cost lithium polymer battery, comprising a battery casing (1) and a sealing cap (2) mounted on the battery casing (1), characterized in that: A positive electrode tab (3) is inserted into one end of the sealing cover (2), and a negative electrode tab (4) is inserted into the other end of the sealing cover (2). The lower ends of the positive electrode tab (3) and the negative electrode tab (4) extend into the battery case (1). The battery case (1) is filled with polymer electrolyte (5), and a polymer diaphragm (6) is provided at the center of the inner cavity of the battery case (1).

2. The high-energy, low-cost lithium polymer battery according to claim 1, characterized in that: The polymer separator (6) divides the inner cavity of the battery case (1) into a positive electrode region (7) and a negative electrode region (8), with the positive electrode tab (3) located in the positive electrode region (7) and the negative electrode tab (4) located in the negative electrode region (8).

3. The high-energy, low-cost lithium polymer battery according to claim 2, characterized in that: The surface of the polymer membrane (6) is provided with micro-holes (9), which are arranged in a honeycomb pattern.

4. The high-energy, low-cost lithium polymer battery according to claim 3, characterized in that: The surface of the battery casing (1) is covered with an aluminum-plastic composite film (10), and the surface of the aluminum-plastic composite film (10) is wrapped with adhesive tape (11).

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