High-temperature-resistant sealing ring for battery

Abstract

The utility model discloses a kind of high-temperature-resistant sealing rings for battery, relate to battery manufacturing technical field.The utility model includes connecting assembly, flexible sealing ring, protection component and containing box, connecting assembly includes inner tube and flexible outer tube, and flexible outer tube is provided on the circumference side of inner tube, and the inner wall of inner tube is fixed with protection component, and protection component includes sealing sheet and reinforcing ring, and reinforcing ring is fixed at the bottom end edge of sealing sheet, and sealing sheet and reinforcing ring are all fixed on the inner wall of inner tube, and the bottom end center of sealing sheet is fixed with containing box, and the circumference side of flexible outer tube is fixed with flexible sealing ring.The utility model is fixed with containing box by setting connecting assembly, flexible sealing ring, protection component and containing box, solve the problem that battery sealing ring is not high enough to high-temperature environment applicability, and sealing ring is easy to accelerate the combustion of battery after the fire in battery, the advantage of the utility model is: battery sealing ring is better to high-temperature environment applicability, and can be to a certain extent Flame Retardant.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology, and in particular relates to a high-temperature resistant sealing ring for batteries. Background Technology

[0002] Battery sealing rings are critical components in battery modules, primarily used to prevent electrolyte leakage, isolate external environments (such as moisture and oxygen), and maintain internal pressure balance. Their performance directly affects the battery's safety, lifespan, and reliability. Common applications include cylindrical batteries (such as 18650 and 21700), prismatic batteries, pouch batteries, and special batteries (such as lithium thionyl chloride batteries). However, they still have the following drawbacks in practical use:

[0003] During the use of battery sealing rings, the sealing rings usually change with the operating temperature. When the battery is at a high temperature, the sealing ring expands. After the temperature drops, the sealing ring returns to its original shape. After long-term working cycles, the elasticity of the sealing ring is easily reduced. The elasticity has no compensation effect, which affects the battery's suitability for high-temperature operating environments.

[0004] Secondly, during battery sealing ring operation, if the battery overheats and catches fire, the flames will directly burn through the sealing ring and spread to the outside of the battery. Furthermore, some battery sealing rings are made of flammable materials, which can easily accelerate battery combustion and affect battery safety. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature resistant sealing ring for batteries. By setting up a connecting component, a flexible sealing ring, a protective component, and a housing, it solves the problems that the battery sealing ring is not suitable for high-temperature environments and that the sealing ring can easily accelerate the combustion of the battery after an internal fire.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a high-temperature resistant sealing ring for batteries, comprising a connecting assembly, a flexible sealing ring, a protective assembly, and a receiving box. The connecting assembly includes an inner cylinder and a flexible outer cylinder. The flexible outer cylinder is disposed around the periphery of the inner cylinder. The protective assembly is fixed to the inner wall of the inner cylinder. The protective assembly includes a sealing sheet and a reinforcing ring. The reinforcing ring is fixed at the bottom edge of the sealing sheet. Both the sealing sheet and the reinforcing ring are fixed to the inner wall of the inner cylinder. The receiving box is fixed at the bottom center of the sealing sheet. The flexible sealing ring is fixed around the periphery of the flexible outer cylinder. During operation, the connecting assembly fixes the protective assembly in the inner cylinder, and the flexible sealing ring is fixed around the periphery of the flexible outer cylinder. Through the operation of the protective assembly, the inner cylinder is sealed, and the receiving box is placed in the inner cylinder. The flame-retardant dry powder is placed in the receiving box, and the interior of the battery is sealed by the flexible sealing ring.

[0008] Furthermore, the connecting assembly also includes an elastic ring. The diameter of the inner cylinder is smaller than the inner diameter of the flexible outer cylinder. The upper and lower parts of the inner cylinder and the flexible outer cylinder are both fixed with elastic rings. During operation, the elastic ring increases the squeezing effect of the flexible outer cylinder on the flexible sealing ring.

[0009] Furthermore, the flexible sealing ring is hollow, and an inner filling ring is fixed inside the flexible sealing ring. An outer ring is fixed around the periphery of the flexible sealing ring. The inner filling ring inside the flexible sealing ring increases elasticity and is pressed against the inner wall of the battery by the outer ring to seal the inside of the battery.

[0010] Furthermore, the protective assembly also includes a fixing plate one and a fixing plate two, which are fixed to each other. During operation, the fixing plate one and the fixing plate two are fixed in the inner cylinder to increase strength.

[0011] Furthermore, the bottom end of the second fixing piece is fixed to the top end of the sealing piece, and both the first fixing piece and the second fixing piece are fixed to the inner wall of the inner cylinder, increasing the connection strength of the protective components.

[0012] Furthermore, the bottom of the container is open, a flexible membrane is fixed to the lower part of the inner wall of the container, and flame-retardant dry powder is placed inside the container at the top of the flexible membrane. During operation, the flame-retardant dry powder is sealed inside the container by the flexible membrane.

[0013] This utility model has the following beneficial effects:

[0014] This invention solves the problem of insufficient adaptability of battery sealing rings to high-temperature environments by setting up a connecting component and a flexible sealing ring. The connecting component is inserted into the battery, ensuring that the receiving box is facing the energy storage component inside the battery. At this time, the outer ring of the flexible sealing ring is pressed against the inner wall of the battery, sealing the inside of the battery. During this process, the inner filling ring inside the flexible sealing ring increases the sealing strength, while the elastic ring between the inner cylinder and the flexible outer cylinder increases the compressive force and compensates for the sealing effect. This allows the battery sealing ring to compensate for the sealing compressive force and increases the adaptability of the sealing ring to high-temperature environments.

[0015] This invention solves the problem that the sealing ring can easily accelerate the combustion of a battery after an internal fire by setting up a connecting component, a protective component, and a housing box. When a fire breaks out inside the battery, the flame rises into the inner cylinder, burns the sealing sheet inside the inner cylinder, and damages the flexible membrane at the bottom of the housing box. The flame-retardant dry powder falls into the energy storage structure inside the battery, slowing down the combustion rate of the energy storage structure inside the battery and increasing the safety of battery use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0017] Figure 1 A three-dimensional view of the assembly structure of a high-temperature resistant sealing ring for a battery;

[0018] Figure 2 A three-dimensional view of the structure after the connecting component has been cut open;

[0019] Figure 3 This is a three-dimensional view of the flexible sealing ring section after it has been cut open.

[0020] Figure 4 A three-dimensional view of the protective components;

[0021] Figure 5 This is a three-dimensional view of the structure after the box is cut open.

[0022] Figure label:

[0023] 1. Connecting assembly; 101. Inner cylinder; 102. Elastic ring; 103. Flexible outer cylinder; 2. Flexible sealing ring; 201. Inner filling ring; 202. Outer ring; 3. Protective assembly; 301. Fixing piece one; 302. Fixing piece two; 303. Sealing piece; 304. Reinforcing ring; 4. Receiving box; 401. Flame retardant dry powder; 402. Flexible membrane. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0025] Please see Figure 1-3This utility model relates to a high-temperature resistant sealing ring for batteries, comprising a connecting component 1, a flexible sealing ring 2, a protective component 3, and a receiving box 4. The connecting component 1 includes an inner cylinder 101 and a flexible outer cylinder 103. The flexible outer cylinder 103 is disposed around the periphery of the inner cylinder 101, and the protective component 3 is fixed within the inner cylinder 101. The flexible outer cylinder 103 is used to connect the flexible sealing ring 2. The protective component 3 is fixed on the inner wall of the inner cylinder 101, and the protective component 3 seals the interior of the inner cylinder 101. The protective component 3 includes a sealing sheet 303 and a reinforcing ring 304. A reinforcing ring 304 is fixed at the bottom edge of the inner cylinder 101. Both the sealing sheet 303 and the reinforcing ring 304 are fixed to the inner wall of the inner cylinder 101. The sealing sheet 303 seals the inner cylinder 101. The reinforcing ring 304 increases the fixing strength between the sealing sheet 303 and the inner cylinder 101. A receiving box 4 is fixed at the bottom center of the sealing sheet 303. The receiving box 4 contains the flame-retardant dry powder 401. If a fire breaks out inside the battery, the flame-retardant dry powder 401 falls into the battery and slows down the spread of the flame. A flexible sealing ring 2 is fixed around the flexible outer cylinder 103. The flexible sealing ring 2 seals the gap between the flexible outer cylinder 103 and the battery.

[0026] Specifically, the connecting assembly 1 also includes an elastic ring 102. The diameter of the inner cylinder 101 is smaller than the inner diameter of the flexible outer cylinder 103. The upper and lower parts of the inner cylinder 101 and the flexible outer cylinder 103 are both fixed with elastic rings 102. The elastic rings 102 included in the connecting assembly 1 connect the inner cylinder 101 and the flexible outer cylinder 103 together, and compensate for the deformation of the flexible outer cylinder 103 and the flexible sealing ring 2 through the elastic rings 102, thereby increasing the sealing effect.

[0027] Furthermore, the flexible sealing ring 2 is hollow, and an inner filling ring 201 is fixed inside the flexible sealing ring 2. An outer ring 202 is fixed around the periphery of the flexible sealing ring 2. The inner filling ring 201 inside the flexible sealing ring 2 increases the elasticity of the flexible sealing ring 2, and the outer ring 202 contacts the battery and is squeezed against the inside of the battery to perform the sealing work.

[0028] The operation process of this embodiment is as follows: During operation, the connecting component 1 is inserted into the battery, and the receiving box 4 is positioned facing the energy storage component inside the battery. At this time, the outer ring 202 on the periphery of the flexible sealing ring 2 is pressed against the inner wall of the battery to seal the inside of the battery. During this process, the inner filling ring 201 inside the flexible sealing ring 2 increases the sealing strength, and at the same time, the elastic ring 102 between the inner cylinder 101 and the flexible outer cylinder 103 increases the compressive force and compensates for the sealing effect. Specific Implementation Example 2

[0029] Please see Figure 1 , 24, 5. Based on the first specific embodiment, the protection component 3 also includes a first fixing piece 301 and a second fixing piece 302. The first fixing piece 301 and the second fixing piece 302 are fixed to each other. The first fixing piece 301 and the second fixing piece 302 of the protection component 3 are fixed on the inner cylinder 101 and fixed to each other to protect the sealing piece 303.

[0030] Specifically, the bottom end of the fixing piece 302 is fixed to the top end of the sealing piece 303. Both the fixing piece 301 and the fixing piece 302 are fixed to the inner wall of the inner cylinder 101, so that the inner cylinder 101 is sealed during operation, preventing the sealing piece 303 from being damaged by the pressure inside the battery during operation.

[0031] Furthermore, the bottom of the receiving box 4 is open, and a flexible membrane 402 is fixed to the lower part of the inner wall of the receiving box 4. Flame retardant dry powder 401 is disposed inside the receiving box 4 at the top of the flexible membrane 402. The flame retardant dry powder 401 is contained in the receiving box 4 and sealed inside the receiving box 4 by the flexible membrane 402. When the battery catches fire, the flexible membrane 402 is broken, and the flame retardant dry powder 401 falls into the battery, slowing down the burning rate of the battery's internal structure.

[0032] The operation process of this embodiment is as follows: During operation, when a fire occurs inside the battery, the flame rises into the inner cylinder 101, burns the sealing sheet 303 inside the inner cylinder 101, and destroys the flexible membrane 402 in the lower part of the container 4. The flame-retardant dry powder 401 falls into the energy storage structure inside the battery, slowing down the burning rate of the energy storage structure inside the battery and increasing the safety of battery use.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-temperature-resistant sealing ring for a battery, comprising a connecting assembly (1), a flexible sealing ring (2), a protection assembly (3) and a containing box (4), characterized in that: The connecting assembly (1) includes an inner cylinder (101) and a flexible outer cylinder (103). The flexible outer cylinder (103) is provided around the inner cylinder (101). A protective assembly (3) is fixed on the inner wall of the inner cylinder (101). The protective assembly (3) includes a sealing plate (303) and a reinforcing ring (304). The reinforcing ring (304) is fixed at the bottom edge of the sealing plate (303). The sealing plate (303) and the reinforcing ring (304) are both fixed on the inner wall of the inner cylinder (101). A receiving box (4) is fixed at the center of the bottom end of the sealing plate (303). A flexible sealing ring (2) is fixed around the flexible outer cylinder (103).

2. The high temperature resistant sealing ring for battery of claim 1, wherein: The connecting assembly (1) further includes an elastic ring (102). The diameter of the inner cylinder (101) is smaller than the inner diameter of the flexible outer cylinder (103). The upper and lower parts of the inner cylinder (101) and the flexible outer cylinder (103) are both fixed with elastic rings (102).

3. The high temperature resistant sealing ring for battery as claimed in claim 1, wherein: The flexible sealing ring (2) is hollow inside, and an inner filling ring (201) is fixed inside the flexible sealing ring (2), and an outer ring (202) is fixed on the periphery of the flexible sealing ring (2).

4. The high temperature resistant sealing ring for battery of claim 1, wherein: The protective component (3) further includes a fixing piece one (301) and a fixing piece two (302), which are fixed to each other.

5. A high-temperature resistant sealing ring for batteries according to claim 4, characterized in that: The bottom end of the second fixing piece (302) is fixed to the top end of the sealing piece (303), and both the first fixing piece (301) and the second fixing piece (302) are fixed on the inner wall of the inner cylinder (101).

6. The high temperature resistant sealing ring for battery of claim 1, wherein: The bottom of the container (4) is open, and a flexible membrane (402) is fixed to the lower part of the inner wall of the container (4). Flame-retardant dry powder (401) is placed inside the container (4) at the top of the flexible membrane (402).

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