Flame-retardant safe lithium battery core

Abstract

The utility model provides a flame-retardant safe lithium battery core, which relates to the technical field of safe lithium battery cores and comprises a battery core shell, a battery positive electrode and a battery negative electrode are mounted at the top of the battery core shell, a battery core body is mounted in the battery core shell, and a fire extinguishing component is mounted at the bottom of the battery core body. Flame-retardant foam is arranged between the battery cell body and the battery cell shell, a plurality of first through grooves are formed in the flame-retardant foam, a flame-retardant cavity is formed in the top of the flame-retardant foam, and the flame-retardant cavity is filled with a flame-retardant protective layer. The device can effectively prevent the combustion of the battery core body, and achieves the purpose of flame retardance, so that the continuous combustion of the lithium battery is effectively reduced, and the self-explosion condition is avoided; the flame retardant is arranged, so that flame spreading can be slowed down or inhibited; and by arranging the heat insulation layer, the heat transferred to the surrounding environment when the battery core body is overheated can be reduced, so that the fire risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of a safety lithium battery core, and more specifically, particularly relates to a flame-retardant safety lithium battery core. Background Art

[0002] A lithium battery is a type of battery with a lithium metal or lithium alloy as the negative electrode material and using a non-aqueous electrolyte solution. With the progress of lithium battery technology, its application fields are becoming more and more extensive. It can be found in small digital products such as mobile phones, cameras, and drones, and large fields such as aerospace, aviation, and automobiles. Lithium batteries have advantages such as large capacity and high monomer energy density.

[0003] Based on the above, the inventor found the following problems: Due to the strong activity of the core material alkali metal lithium used in new energy, when the existing safety lithium battery is impacted or dropped during use, the internal lithium battery core will be impacted by external forces, resulting in thermal runaway, and dangerous situations such as spontaneous combustion and even self-explosion may occur, posing a serious threat to personal safety and also causing a large amount of property losses.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a flame-retardant safety lithium battery core is provided with the expectation of achieving a more practical value. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a flame-retardant safety lithium battery core to solve the problem that the existing lithium battery core will have thermal runaway and dangerous situations such as spontaneous combustion and even self-explosion when impacted by external forces.

[0006] The purpose and effect of a flame-retardant safety lithium battery core of the utility model are achieved by the following specific technical means:

[0007] A flame-retardant safety lithium battery core includes a battery core housing. A battery positive electrode and a battery negative electrode are installed at the top of the battery core housing. A battery core body is installed inside the battery core housing. A fire extinguishing component is installed at the bottom of the battery core body. A flame-retardant foam is provided between the battery core body and the battery core housing. A plurality of through grooves one are formed inside the flame-retardant foam. A flame-retardant chamber is provided at the top of the flame-retardant foam, and a flame-retardant protective layer is filled in the flame-retardant chamber.

[0008] Further, the fire extinguishing component includes a group of through grooves two installed at the bottom of the battery core body. One end of the group of through grooves two is connected to a storage bin, and carbon dioxide gas is provided inside the storage bin.

[0009] Further, polyurethane rubber is provided inside the group of through grooves two.

[0010] Furthermore, the flame-retardant protective layer includes a flame retardant and a heat-insulating layer.

[0011] Furthermore, a flame-retardant filler is provided between the battery core bodies, and the material of the flame-retardant filler is alumina.

[0012] Furthermore, the material of the flame retardant is aluminum hydroxide.

[0013] Furthermore, the material of the heat-insulating layer is glass fiber.

[0014] Furthermore, the material of the battery core housing is polycarbonate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Through the combined use of the second through groove, the storage bin, carbon dioxide gas, polyurethane rubber, flame-retardant foam, and the first through groove, when the lithium battery core body is impacted by an external force and catches fire, the melting point of the polyurethane rubber is lower than that of the battery core body. When the battery core body reaches the self-ignition point, the polyurethane rubber is melted, and the carbon dioxide gas in the storage bin enters the flame-retardant foam through the second through groove, and then enters the first through groove to extinguish the self-igniting battery core body. Through the above design, it can effectively prevent the combustion of the battery core body, achieve the purpose of flame retardance, thereby effectively reducing the continuous combustion of the lithium battery and avoiding the situation of self-explosion.

[0017] The polyurethane rubber is easy to soften when encountering high temperatures and can be melted well, ensuring that carbon dioxide can play a flame-retardant role in a timely manner.

[0018] By setting the flame-retardant filler, alumina has good flame-retardant properties, can effectively slow down or inhibit the spread of flames, thereby improving the overall flame-retardant performance of the battery core body. At the same time, it can help with heat dissipation, contribute to reducing the battery temperature, and can increase the strength and hardness of the material, improving the durability and stability of the battery core body.

[0019] By setting the flame retardant, aluminum hydroxide has the function of slowing down or inhibiting the spread of flames, effectively improving the flame-retardant performance of the battery core body.

[0020] By setting the heat-insulating layer, the glass fiber can reduce the heat transferred from the battery core body to the surrounding environment when overheating occurs, thereby reducing the fire risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional schematic diagram of a flame-retardant safety lithium battery core of the utility model.

[0022] Figure 2 is a planar schematic diagram of a flame-retardant safety lithium battery core of the utility model.

[0023] Figure 3 This is a top view schematic diagram of a flame-retardant safety lithium battery core of the present utility model.

[0024] Figure 4 This is a plan view schematic diagram of a flame-retardant protective layer of a flame-retardant safety lithium battery core of the present utility model.

[0025] In the figure, the corresponding relationship between the component names and the drawing reference numerals is as follows:

[0026] 1. Battery core housing; 2. Battery positive electrode; 3. Battery negative electrode; 4. Battery core body; 5. Flame-retardant foam; 6. First through groove; 7. Flame-retardant chamber; 8. Flame-retardant protective layer; 801. Flame retardant; 802. Heat insulation layer; 9. Second through groove; 10. Storage bin; 11. Polyurethane rubber; 12. Flame-retardant filler. Specific embodiments

[0027] The following further describes in detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0028] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Example:

[0031] As shown in Figure 1 to Figure 4 shown:

[0032] The utility model provides a flame-retardant safety lithium battery core, which includes a battery core housing 1. A battery positive electrode 2 and a battery negative electrode 3 are installed at the top of the battery core housing 1. A battery core body 4 is installed inside the battery core housing 1. A fire extinguishing component is installed at the bottom of the battery core body 4. A flame-retardant foam 5 is arranged between the battery core body 4 and the battery core housing 1. A number of first through grooves 6 are formed inside the flame-retardant foam 5. A flame-retardant chamber 7 is arranged at the top of the flame-retardant foam 5. A flame-retardant protective layer 8 is filled inside the flame-retardant chamber 7.

[0033] Among them, the fire extinguishing component includes a group of second through grooves 9 installed at the bottom of the battery core body 4. One end of the group of second through grooves 9 is connected to a storage bin 10. Carbon dioxide gas is arranged inside the storage bin 10. Through the cooperation of the second through grooves 9, the storage bin 10, the carbon dioxide gas, a polyurethane rubber 11, the flame-retardant foam 5 and the first through grooves 6, when the lithium battery core body 4 is impacted by an external force and catches fire, the melting point of the polyurethane rubber 11 is lower than that of the battery core body 4. When the battery core body 4 reaches the self-ignition point, the polyurethane rubber 11 is melted. The carbon dioxide gas in the storage bin 10 enters the flame-retardant foam 5 from the second through grooves 9, and then enters the first through grooves 6 to extinguish the self-igniting battery core body 4. Through the above design, the combustion of the battery core body 4 can be effectively prevented, achieving the purpose of flame retardance, thereby effectively reducing the continuous combustion of the lithium battery and avoiding the situation of self-explosion.

[0034] Among them, a polyurethane rubber 11 is arranged inside the group of second through grooves 9. The polyurethane rubber 11 is easy to soften when encountering high temperatures and can be well melted, ensuring that the carbon dioxide can play a flame-retardant role in time.

[0035] Among them, the flame-retardant protective layer 8 includes a flame retardant 801 and a heat insulation layer 802.

[0036] Among them, a flame-retardant filler 12 is arranged between the battery core bodies 4. The material of the flame-retardant filler 12 is alumina. By setting the flame-retardant filler 12, alumina has good flame-retardant performance, can effectively slow down or inhibit the spread of flames, thereby improving the overall flame-retardant performance of the battery core body 4. At the same time, it can help with heat dissipation, contribute to reducing the battery temperature, and can increase the strength and hardness of the material, improving the durability and stability of the battery core body 4.

[0037] Among them, the material of the flame retardant 801 is aluminum hydroxide. By setting the flame retardant 801, aluminum hydroxide has the effect of slowing down or inhibiting the spread of flames, effectively improving the flame-retardant performance of the battery core body 4.

[0038] Among them, the material of the heat insulation layer 802 is glass fiber. By providing the heat insulation layer 802, the glass fiber can reduce the heat transferred from the battery cell body 4 to the surrounding environment when overheating occurs, thereby reducing the fire risk.

[0039] Among them, the material of the battery cell housing 1 is polycarbonate. Using polycarbonate as the material of the battery cell housing 1 can effectively improve its flame retardant performance.

[0040] Specific usage method and function of this embodiment:

[0041] During the use of this utility model, first confirm the integrity of the device. When the lithium battery cell body 4 is impacted by an external force and catches fire spontaneously, its internal temperature rises sharply. The melting point of the polyurethane rubber 11 is lower than that of the battery cell body 4. When the battery cell body 4 reaches the spontaneous combustion point, the polyurethane rubber 11 is melted, and the carbon dioxide gas in the storage bin 10 enters the flame retardant foam 5 from the through groove two 9, and then enters the through groove one 6 to extinguish the spontaneously combusted battery cell body 4, making it impossible or difficult for the combustion of the organic electrolyte to proceed, thereby achieving the purpose of flame retardance. By providing the flame retardant filler 12, alumina has good flame retardant performance, which can effectively slow down or inhibit the spread of the flame, thereby improving the overall flame retardant performance of the battery cell body 4. At the same time, it can help with heat dissipation, contribute to reducing the battery temperature, and can increase the strength and hardness of the material, improving the durability and stability of the battery cell body 4. At the same time, a heat insulation layer 802 is provided on the top of the flame retardant foam 5, which can reduce the heat transferred from the battery cell body 4 to the surrounding environment when overheating occurs, thereby reducing the fire risk. Through the above design, it can effectively prevent the combustion of the battery cell body 4 from proceeding, thereby effectively reducing the continuous combustion of the lithium battery and avoiding the situation of self-explosion.

[0042] The embodiments of this utility model are given for purposes of illustration and description, and are not exhaustive or limit the utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the utility model and its practical application, and to enable those of ordinary skill in the art to understand the utility model and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A flame-retardant safety lithium battery cell, comprising a battery cell housing (1), characterized in that: At the top of the battery cell housing (1), a battery positive electrode (2) and a battery negative electrode (3) are installed. Inside the battery cell housing (1), a battery cell body (4) is installed. At the bottom of the battery cell body (4), a fire extinguishing component is installed. A flame retardant foam (5) is provided between the battery cell body (4) and the battery cell housing (1). A number of first through grooves (6) are formed inside the flame retardant foam (5). At the top of the flame retardant foam (5), a flame retardant chamber (7) is provided, and a flame retardant protective layer (8) is filled inside the flame retardant chamber (7).

2. The flame-retardant safety lithium battery cell according to claim 1, wherein: The fire extinguishing component includes a group of second through grooves (9) installed at the bottom of the battery cell body (4). One end of the group of second through grooves (9) is connected to a storage bin (10), and carbon dioxide gas is provided inside the storage bin (10).

3. The flame-retardant safety lithium battery core according to claim 2, wherein: A polyurethane rubber (11) is provided inside the group of second through grooves (9).

4. The flame-retardant safety lithium battery cell according to claim 1, wherein: The flame retardant protective layer (8) includes a flame retardant (801) and a heat insulation layer (802).

5. The flame-retardant safety lithium battery cell according to claim 2, wherein: A flame retardant filler (12) is provided between the battery cell bodies (4), and the material of the flame retardant filler (12) is alumina.

6. The flame-retardant safety lithium battery core according to claim 4, characterized in that: The material of the flame retardant (801) is aluminum hydroxide.

7. The flame-retardant safety lithium battery core according to claim 4, wherein: The material of the heat insulation layer (802) is glass fiber.

8. The flame-retardant safety lithium battery core according to claim 1, characterized in that: The material of the battery cell housing (1) is polycarbonate.

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